| 1 | /* regcomp.c |
| 2 | */ |
| 3 | |
| 4 | /* |
| 5 | * 'A fair jaw-cracker dwarf-language must be.' --Samwise Gamgee |
| 6 | * |
| 7 | * [p.285 of _The Lord of the Rings_, II/iii: "The Ring Goes South"] |
| 8 | */ |
| 9 | |
| 10 | /* This file contains functions for compiling a regular expression. See |
| 11 | * also regexec.c which funnily enough, contains functions for executing |
| 12 | * a regular expression. |
| 13 | * |
| 14 | * This file is also copied at build time to ext/re/re_comp.c, where |
| 15 | * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT. |
| 16 | * This causes the main functions to be compiled under new names and with |
| 17 | * debugging support added, which makes "use re 'debug'" work. |
| 18 | */ |
| 19 | |
| 20 | /* NOTE: this is derived from Henry Spencer's regexp code, and should not |
| 21 | * confused with the original package (see point 3 below). Thanks, Henry! |
| 22 | */ |
| 23 | |
| 24 | /* Additional note: this code is very heavily munged from Henry's version |
| 25 | * in places. In some spots I've traded clarity for efficiency, so don't |
| 26 | * blame Henry for some of the lack of readability. |
| 27 | */ |
| 28 | |
| 29 | /* The names of the functions have been changed from regcomp and |
| 30 | * regexec to pregcomp and pregexec in order to avoid conflicts |
| 31 | * with the POSIX routines of the same names. |
| 32 | */ |
| 33 | |
| 34 | #ifdef PERL_EXT_RE_BUILD |
| 35 | #include "re_top.h" |
| 36 | #endif |
| 37 | |
| 38 | /* |
| 39 | * pregcomp and pregexec -- regsub and regerror are not used in perl |
| 40 | * |
| 41 | * Copyright (c) 1986 by University of Toronto. |
| 42 | * Written by Henry Spencer. Not derived from licensed software. |
| 43 | * |
| 44 | * Permission is granted to anyone to use this software for any |
| 45 | * purpose on any computer system, and to redistribute it freely, |
| 46 | * subject to the following restrictions: |
| 47 | * |
| 48 | * 1. The author is not responsible for the consequences of use of |
| 49 | * this software, no matter how awful, even if they arise |
| 50 | * from defects in it. |
| 51 | * |
| 52 | * 2. The origin of this software must not be misrepresented, either |
| 53 | * by explicit claim or by omission. |
| 54 | * |
| 55 | * 3. Altered versions must be plainly marked as such, and must not |
| 56 | * be misrepresented as being the original software. |
| 57 | * |
| 58 | * |
| 59 | **** Alterations to Henry's code are... |
| 60 | **** |
| 61 | **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
| 62 | **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
| 63 | **** by Larry Wall and others |
| 64 | **** |
| 65 | **** You may distribute under the terms of either the GNU General Public |
| 66 | **** License or the Artistic License, as specified in the README file. |
| 67 | |
| 68 | * |
| 69 | * Beware that some of this code is subtly aware of the way operator |
| 70 | * precedence is structured in regular expressions. Serious changes in |
| 71 | * regular-expression syntax might require a total rethink. |
| 72 | */ |
| 73 | #include "EXTERN.h" |
| 74 | #define PERL_IN_REGCOMP_C |
| 75 | #include "perl.h" |
| 76 | |
| 77 | #ifndef PERL_IN_XSUB_RE |
| 78 | # include "INTERN.h" |
| 79 | #endif |
| 80 | |
| 81 | #define REG_COMP_C |
| 82 | #ifdef PERL_IN_XSUB_RE |
| 83 | # include "re_comp.h" |
| 84 | EXTERN_C const struct regexp_engine my_reg_engine; |
| 85 | #else |
| 86 | # include "regcomp.h" |
| 87 | #endif |
| 88 | |
| 89 | #include "dquote_static.c" |
| 90 | #include "charclass_invlists.h" |
| 91 | #include "inline_invlist.c" |
| 92 | #include "unicode_constants.h" |
| 93 | |
| 94 | #define HAS_NONLATIN1_FOLD_CLOSURE(i) \ |
| 95 | _HAS_NONLATIN1_FOLD_CLOSURE_ONLY_FOR_USE_BY_REGCOMP_DOT_C_AND_REGEXEC_DOT_C(i) |
| 96 | #define HAS_NONLATIN1_SIMPLE_FOLD_CLOSURE(i) \ |
| 97 | _HAS_NONLATIN1_SIMPLE_FOLD_CLOSURE_ONLY_FOR_USE_BY_REGCOMP_DOT_C_AND_REGEXEC_DOT_C(i) |
| 98 | #define IS_NON_FINAL_FOLD(c) _IS_NON_FINAL_FOLD_ONLY_FOR_USE_BY_REGCOMP_DOT_C(c) |
| 99 | #define IS_IN_SOME_FOLD_L1(c) _IS_IN_SOME_FOLD_ONLY_FOR_USE_BY_REGCOMP_DOT_C(c) |
| 100 | |
| 101 | #ifndef STATIC |
| 102 | #define STATIC static |
| 103 | #endif |
| 104 | |
| 105 | |
| 106 | struct RExC_state_t { |
| 107 | U32 flags; /* RXf_* are we folding, multilining? */ |
| 108 | U32 pm_flags; /* PMf_* stuff from the calling PMOP */ |
| 109 | char *precomp; /* uncompiled string. */ |
| 110 | REGEXP *rx_sv; /* The SV that is the regexp. */ |
| 111 | regexp *rx; /* perl core regexp structure */ |
| 112 | regexp_internal *rxi; /* internal data for regexp object |
| 113 | pprivate field */ |
| 114 | char *start; /* Start of input for compile */ |
| 115 | char *end; /* End of input for compile */ |
| 116 | char *parse; /* Input-scan pointer. */ |
| 117 | SSize_t whilem_seen; /* number of WHILEM in this expr */ |
| 118 | regnode *emit_start; /* Start of emitted-code area */ |
| 119 | regnode *emit_bound; /* First regnode outside of the |
| 120 | allocated space */ |
| 121 | regnode *emit; /* Code-emit pointer; if = &emit_dummy, |
| 122 | implies compiling, so don't emit */ |
| 123 | regnode_ssc emit_dummy; /* placeholder for emit to point to; |
| 124 | large enough for the largest |
| 125 | non-EXACTish node, so can use it as |
| 126 | scratch in pass1 */ |
| 127 | I32 naughty; /* How bad is this pattern? */ |
| 128 | I32 sawback; /* Did we see \1, ...? */ |
| 129 | U32 seen; |
| 130 | SSize_t size; /* Code size. */ |
| 131 | I32 npar; /* Capture buffer count, (OPEN) plus |
| 132 | one. ("par" 0 is the whole |
| 133 | pattern)*/ |
| 134 | I32 nestroot; /* root parens we are in - used by |
| 135 | accept */ |
| 136 | I32 extralen; |
| 137 | I32 seen_zerolen; |
| 138 | regnode **open_parens; /* pointers to open parens */ |
| 139 | regnode **close_parens; /* pointers to close parens */ |
| 140 | regnode *opend; /* END node in program */ |
| 141 | I32 utf8; /* whether the pattern is utf8 or not */ |
| 142 | I32 orig_utf8; /* whether the pattern was originally in utf8 */ |
| 143 | /* XXX use this for future optimisation of case |
| 144 | * where pattern must be upgraded to utf8. */ |
| 145 | I32 uni_semantics; /* If a d charset modifier should use unicode |
| 146 | rules, even if the pattern is not in |
| 147 | utf8 */ |
| 148 | HV *paren_names; /* Paren names */ |
| 149 | |
| 150 | regnode **recurse; /* Recurse regops */ |
| 151 | I32 recurse_count; /* Number of recurse regops */ |
| 152 | U8 *study_chunk_recursed; /* bitmap of which parens we have moved |
| 153 | through */ |
| 154 | U32 study_chunk_recursed_bytes; /* bytes in bitmap */ |
| 155 | I32 in_lookbehind; |
| 156 | I32 contains_locale; |
| 157 | I32 contains_i; |
| 158 | I32 override_recoding; |
| 159 | I32 in_multi_char_class; |
| 160 | struct reg_code_block *code_blocks; /* positions of literal (?{}) |
| 161 | within pattern */ |
| 162 | int num_code_blocks; /* size of code_blocks[] */ |
| 163 | int code_index; /* next code_blocks[] slot */ |
| 164 | SSize_t maxlen; /* mininum possible number of chars in string to match */ |
| 165 | #ifdef ADD_TO_REGEXEC |
| 166 | char *starttry; /* -Dr: where regtry was called. */ |
| 167 | #define RExC_starttry (pRExC_state->starttry) |
| 168 | #endif |
| 169 | SV *runtime_code_qr; /* qr with the runtime code blocks */ |
| 170 | #ifdef DEBUGGING |
| 171 | const char *lastparse; |
| 172 | I32 lastnum; |
| 173 | AV *paren_name_list; /* idx -> name */ |
| 174 | #define RExC_lastparse (pRExC_state->lastparse) |
| 175 | #define RExC_lastnum (pRExC_state->lastnum) |
| 176 | #define RExC_paren_name_list (pRExC_state->paren_name_list) |
| 177 | #endif |
| 178 | }; |
| 179 | |
| 180 | #define RExC_flags (pRExC_state->flags) |
| 181 | #define RExC_pm_flags (pRExC_state->pm_flags) |
| 182 | #define RExC_precomp (pRExC_state->precomp) |
| 183 | #define RExC_rx_sv (pRExC_state->rx_sv) |
| 184 | #define RExC_rx (pRExC_state->rx) |
| 185 | #define RExC_rxi (pRExC_state->rxi) |
| 186 | #define RExC_start (pRExC_state->start) |
| 187 | #define RExC_end (pRExC_state->end) |
| 188 | #define RExC_parse (pRExC_state->parse) |
| 189 | #define RExC_whilem_seen (pRExC_state->whilem_seen) |
| 190 | #ifdef RE_TRACK_PATTERN_OFFSETS |
| 191 | #define RExC_offsets (pRExC_state->rxi->u.offsets) /* I am not like the |
| 192 | others */ |
| 193 | #endif |
| 194 | #define RExC_emit (pRExC_state->emit) |
| 195 | #define RExC_emit_dummy (pRExC_state->emit_dummy) |
| 196 | #define RExC_emit_start (pRExC_state->emit_start) |
| 197 | #define RExC_emit_bound (pRExC_state->emit_bound) |
| 198 | #define RExC_naughty (pRExC_state->naughty) |
| 199 | #define RExC_sawback (pRExC_state->sawback) |
| 200 | #define RExC_seen (pRExC_state->seen) |
| 201 | #define RExC_size (pRExC_state->size) |
| 202 | #define RExC_maxlen (pRExC_state->maxlen) |
| 203 | #define RExC_npar (pRExC_state->npar) |
| 204 | #define RExC_nestroot (pRExC_state->nestroot) |
| 205 | #define RExC_extralen (pRExC_state->extralen) |
| 206 | #define RExC_seen_zerolen (pRExC_state->seen_zerolen) |
| 207 | #define RExC_utf8 (pRExC_state->utf8) |
| 208 | #define RExC_uni_semantics (pRExC_state->uni_semantics) |
| 209 | #define RExC_orig_utf8 (pRExC_state->orig_utf8) |
| 210 | #define RExC_open_parens (pRExC_state->open_parens) |
| 211 | #define RExC_close_parens (pRExC_state->close_parens) |
| 212 | #define RExC_opend (pRExC_state->opend) |
| 213 | #define RExC_paren_names (pRExC_state->paren_names) |
| 214 | #define RExC_recurse (pRExC_state->recurse) |
| 215 | #define RExC_recurse_count (pRExC_state->recurse_count) |
| 216 | #define RExC_study_chunk_recursed (pRExC_state->study_chunk_recursed) |
| 217 | #define RExC_study_chunk_recursed_bytes \ |
| 218 | (pRExC_state->study_chunk_recursed_bytes) |
| 219 | #define RExC_in_lookbehind (pRExC_state->in_lookbehind) |
| 220 | #define RExC_contains_locale (pRExC_state->contains_locale) |
| 221 | #define RExC_contains_i (pRExC_state->contains_i) |
| 222 | #define RExC_override_recoding (pRExC_state->override_recoding) |
| 223 | #define RExC_in_multi_char_class (pRExC_state->in_multi_char_class) |
| 224 | |
| 225 | |
| 226 | #define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?') |
| 227 | #define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \ |
| 228 | ((*s) == '{' && regcurly(s))) |
| 229 | |
| 230 | /* |
| 231 | * Flags to be passed up and down. |
| 232 | */ |
| 233 | #define WORST 0 /* Worst case. */ |
| 234 | #define HASWIDTH 0x01 /* Known to match non-null strings. */ |
| 235 | |
| 236 | /* Simple enough to be STAR/PLUS operand; in an EXACTish node must be a single |
| 237 | * character. (There needs to be a case: in the switch statement in regexec.c |
| 238 | * for any node marked SIMPLE.) Note that this is not the same thing as |
| 239 | * REGNODE_SIMPLE */ |
| 240 | #define SIMPLE 0x02 |
| 241 | #define SPSTART 0x04 /* Starts with * or + */ |
| 242 | #define POSTPONED 0x08 /* (?1),(?&name), (??{...}) or similar */ |
| 243 | #define TRYAGAIN 0x10 /* Weeded out a declaration. */ |
| 244 | #define RESTART_UTF8 0x20 /* Restart, need to calcuate sizes as UTF-8 */ |
| 245 | |
| 246 | #define REG_NODE_NUM(x) ((x) ? (int)((x)-RExC_emit_start) : -1) |
| 247 | |
| 248 | /* whether trie related optimizations are enabled */ |
| 249 | #if PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION |
| 250 | #define TRIE_STUDY_OPT |
| 251 | #define FULL_TRIE_STUDY |
| 252 | #define TRIE_STCLASS |
| 253 | #endif |
| 254 | |
| 255 | |
| 256 | |
| 257 | #define PBYTE(u8str,paren) ((U8*)(u8str))[(paren) >> 3] |
| 258 | #define PBITVAL(paren) (1 << ((paren) & 7)) |
| 259 | #define PAREN_TEST(u8str,paren) ( PBYTE(u8str,paren) & PBITVAL(paren)) |
| 260 | #define PAREN_SET(u8str,paren) PBYTE(u8str,paren) |= PBITVAL(paren) |
| 261 | #define PAREN_UNSET(u8str,paren) PBYTE(u8str,paren) &= (~PBITVAL(paren)) |
| 262 | |
| 263 | #define REQUIRE_UTF8 STMT_START { \ |
| 264 | if (!UTF) { \ |
| 265 | *flagp = RESTART_UTF8; \ |
| 266 | return NULL; \ |
| 267 | } \ |
| 268 | } STMT_END |
| 269 | |
| 270 | /* This converts the named class defined in regcomp.h to its equivalent class |
| 271 | * number defined in handy.h. */ |
| 272 | #define namedclass_to_classnum(class) ((int) ((class) / 2)) |
| 273 | #define classnum_to_namedclass(classnum) ((classnum) * 2) |
| 274 | |
| 275 | #define _invlist_union_complement_2nd(a, b, output) \ |
| 276 | _invlist_union_maybe_complement_2nd(a, b, TRUE, output) |
| 277 | #define _invlist_intersection_complement_2nd(a, b, output) \ |
| 278 | _invlist_intersection_maybe_complement_2nd(a, b, TRUE, output) |
| 279 | |
| 280 | /* About scan_data_t. |
| 281 | |
| 282 | During optimisation we recurse through the regexp program performing |
| 283 | various inplace (keyhole style) optimisations. In addition study_chunk |
| 284 | and scan_commit populate this data structure with information about |
| 285 | what strings MUST appear in the pattern. We look for the longest |
| 286 | string that must appear at a fixed location, and we look for the |
| 287 | longest string that may appear at a floating location. So for instance |
| 288 | in the pattern: |
| 289 | |
| 290 | /FOO[xX]A.*B[xX]BAR/ |
| 291 | |
| 292 | Both 'FOO' and 'A' are fixed strings. Both 'B' and 'BAR' are floating |
| 293 | strings (because they follow a .* construct). study_chunk will identify |
| 294 | both FOO and BAR as being the longest fixed and floating strings respectively. |
| 295 | |
| 296 | The strings can be composites, for instance |
| 297 | |
| 298 | /(f)(o)(o)/ |
| 299 | |
| 300 | will result in a composite fixed substring 'foo'. |
| 301 | |
| 302 | For each string some basic information is maintained: |
| 303 | |
| 304 | - offset or min_offset |
| 305 | This is the position the string must appear at, or not before. |
| 306 | It also implicitly (when combined with minlenp) tells us how many |
| 307 | characters must match before the string we are searching for. |
| 308 | Likewise when combined with minlenp and the length of the string it |
| 309 | tells us how many characters must appear after the string we have |
| 310 | found. |
| 311 | |
| 312 | - max_offset |
| 313 | Only used for floating strings. This is the rightmost point that |
| 314 | the string can appear at. If set to SSize_t_MAX it indicates that the |
| 315 | string can occur infinitely far to the right. |
| 316 | |
| 317 | - minlenp |
| 318 | A pointer to the minimum number of characters of the pattern that the |
| 319 | string was found inside. This is important as in the case of positive |
| 320 | lookahead or positive lookbehind we can have multiple patterns |
| 321 | involved. Consider |
| 322 | |
| 323 | /(?=FOO).*F/ |
| 324 | |
| 325 | The minimum length of the pattern overall is 3, the minimum length |
| 326 | of the lookahead part is 3, but the minimum length of the part that |
| 327 | will actually match is 1. So 'FOO's minimum length is 3, but the |
| 328 | minimum length for the F is 1. This is important as the minimum length |
| 329 | is used to determine offsets in front of and behind the string being |
| 330 | looked for. Since strings can be composites this is the length of the |
| 331 | pattern at the time it was committed with a scan_commit. Note that |
| 332 | the length is calculated by study_chunk, so that the minimum lengths |
| 333 | are not known until the full pattern has been compiled, thus the |
| 334 | pointer to the value. |
| 335 | |
| 336 | - lookbehind |
| 337 | |
| 338 | In the case of lookbehind the string being searched for can be |
| 339 | offset past the start point of the final matching string. |
| 340 | If this value was just blithely removed from the min_offset it would |
| 341 | invalidate some of the calculations for how many chars must match |
| 342 | before or after (as they are derived from min_offset and minlen and |
| 343 | the length of the string being searched for). |
| 344 | When the final pattern is compiled and the data is moved from the |
| 345 | scan_data_t structure into the regexp structure the information |
| 346 | about lookbehind is factored in, with the information that would |
| 347 | have been lost precalculated in the end_shift field for the |
| 348 | associated string. |
| 349 | |
| 350 | The fields pos_min and pos_delta are used to store the minimum offset |
| 351 | and the delta to the maximum offset at the current point in the pattern. |
| 352 | |
| 353 | */ |
| 354 | |
| 355 | typedef struct scan_data_t { |
| 356 | /*I32 len_min; unused */ |
| 357 | /*I32 len_delta; unused */ |
| 358 | SSize_t pos_min; |
| 359 | SSize_t pos_delta; |
| 360 | SV *last_found; |
| 361 | SSize_t last_end; /* min value, <0 unless valid. */ |
| 362 | SSize_t last_start_min; |
| 363 | SSize_t last_start_max; |
| 364 | SV **longest; /* Either &l_fixed, or &l_float. */ |
| 365 | SV *longest_fixed; /* longest fixed string found in pattern */ |
| 366 | SSize_t offset_fixed; /* offset where it starts */ |
| 367 | SSize_t *minlen_fixed; /* pointer to the minlen relevant to the string */ |
| 368 | I32 lookbehind_fixed; /* is the position of the string modfied by LB */ |
| 369 | SV *longest_float; /* longest floating string found in pattern */ |
| 370 | SSize_t offset_float_min; /* earliest point in string it can appear */ |
| 371 | SSize_t offset_float_max; /* latest point in string it can appear */ |
| 372 | SSize_t *minlen_float; /* pointer to the minlen relevant to the string */ |
| 373 | SSize_t lookbehind_float; /* is the pos of the string modified by LB */ |
| 374 | I32 flags; |
| 375 | I32 whilem_c; |
| 376 | SSize_t *last_closep; |
| 377 | regnode_ssc *start_class; |
| 378 | } scan_data_t; |
| 379 | |
| 380 | /* |
| 381 | * Forward declarations for pregcomp()'s friends. |
| 382 | */ |
| 383 | |
| 384 | static const scan_data_t zero_scan_data = |
| 385 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,0}; |
| 386 | |
| 387 | #define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL) |
| 388 | #define SF_BEFORE_SEOL 0x0001 |
| 389 | #define SF_BEFORE_MEOL 0x0002 |
| 390 | #define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL) |
| 391 | #define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL) |
| 392 | |
| 393 | #define SF_FIX_SHIFT_EOL (+2) |
| 394 | #define SF_FL_SHIFT_EOL (+4) |
| 395 | |
| 396 | #define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL) |
| 397 | #define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL) |
| 398 | |
| 399 | #define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL) |
| 400 | #define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */ |
| 401 | #define SF_IS_INF 0x0040 |
| 402 | #define SF_HAS_PAR 0x0080 |
| 403 | #define SF_IN_PAR 0x0100 |
| 404 | #define SF_HAS_EVAL 0x0200 |
| 405 | #define SCF_DO_SUBSTR 0x0400 |
| 406 | #define SCF_DO_STCLASS_AND 0x0800 |
| 407 | #define SCF_DO_STCLASS_OR 0x1000 |
| 408 | #define SCF_DO_STCLASS (SCF_DO_STCLASS_AND|SCF_DO_STCLASS_OR) |
| 409 | #define SCF_WHILEM_VISITED_POS 0x2000 |
| 410 | |
| 411 | #define SCF_TRIE_RESTUDY 0x4000 /* Do restudy? */ |
| 412 | #define SCF_SEEN_ACCEPT 0x8000 |
| 413 | #define SCF_TRIE_DOING_RESTUDY 0x10000 |
| 414 | |
| 415 | #define UTF cBOOL(RExC_utf8) |
| 416 | |
| 417 | /* The enums for all these are ordered so things work out correctly */ |
| 418 | #define LOC (get_regex_charset(RExC_flags) == REGEX_LOCALE_CHARSET) |
| 419 | #define DEPENDS_SEMANTICS (get_regex_charset(RExC_flags) \ |
| 420 | == REGEX_DEPENDS_CHARSET) |
| 421 | #define UNI_SEMANTICS (get_regex_charset(RExC_flags) == REGEX_UNICODE_CHARSET) |
| 422 | #define AT_LEAST_UNI_SEMANTICS (get_regex_charset(RExC_flags) \ |
| 423 | >= REGEX_UNICODE_CHARSET) |
| 424 | #define ASCII_RESTRICTED (get_regex_charset(RExC_flags) \ |
| 425 | == REGEX_ASCII_RESTRICTED_CHARSET) |
| 426 | #define AT_LEAST_ASCII_RESTRICTED (get_regex_charset(RExC_flags) \ |
| 427 | >= REGEX_ASCII_RESTRICTED_CHARSET) |
| 428 | #define ASCII_FOLD_RESTRICTED (get_regex_charset(RExC_flags) \ |
| 429 | == REGEX_ASCII_MORE_RESTRICTED_CHARSET) |
| 430 | |
| 431 | #define FOLD cBOOL(RExC_flags & RXf_PMf_FOLD) |
| 432 | |
| 433 | /* For programs that want to be strictly Unicode compatible by dying if any |
| 434 | * attempt is made to match a non-Unicode code point against a Unicode |
| 435 | * property. */ |
| 436 | #define ALWAYS_WARN_SUPER ckDEAD(packWARN(WARN_NON_UNICODE)) |
| 437 | |
| 438 | #define OOB_NAMEDCLASS -1 |
| 439 | |
| 440 | /* There is no code point that is out-of-bounds, so this is problematic. But |
| 441 | * its only current use is to initialize a variable that is always set before |
| 442 | * looked at. */ |
| 443 | #define OOB_UNICODE 0xDEADBEEF |
| 444 | |
| 445 | #define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv)) |
| 446 | #define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b) |
| 447 | |
| 448 | |
| 449 | /* length of regex to show in messages that don't mark a position within */ |
| 450 | #define RegexLengthToShowInErrorMessages 127 |
| 451 | |
| 452 | /* |
| 453 | * If MARKER[12] are adjusted, be sure to adjust the constants at the top |
| 454 | * of t/op/regmesg.t, the tests in t/op/re_tests, and those in |
| 455 | * op/pragma/warn/regcomp. |
| 456 | */ |
| 457 | #define MARKER1 "<-- HERE" /* marker as it appears in the description */ |
| 458 | #define MARKER2 " <-- HERE " /* marker as it appears within the regex */ |
| 459 | |
| 460 | #define REPORT_LOCATION " in regex; marked by " MARKER1 \ |
| 461 | " in m/%"UTF8f MARKER2 "%"UTF8f"/" |
| 462 | |
| 463 | #define REPORT_LOCATION_ARGS(offset) \ |
| 464 | UTF8fARG(UTF, offset, RExC_precomp), \ |
| 465 | UTF8fARG(UTF, RExC_end - RExC_precomp - offset, RExC_precomp + offset) |
| 466 | |
| 467 | /* |
| 468 | * Calls SAVEDESTRUCTOR_X if needed, then calls Perl_croak with the given |
| 469 | * arg. Show regex, up to a maximum length. If it's too long, chop and add |
| 470 | * "...". |
| 471 | */ |
| 472 | #define _FAIL(code) STMT_START { \ |
| 473 | const char *ellipses = ""; \ |
| 474 | IV len = RExC_end - RExC_precomp; \ |
| 475 | \ |
| 476 | if (!SIZE_ONLY) \ |
| 477 | SAVEFREESV(RExC_rx_sv); \ |
| 478 | if (len > RegexLengthToShowInErrorMessages) { \ |
| 479 | /* chop 10 shorter than the max, to ensure meaning of "..." */ \ |
| 480 | len = RegexLengthToShowInErrorMessages - 10; \ |
| 481 | ellipses = "..."; \ |
| 482 | } \ |
| 483 | code; \ |
| 484 | } STMT_END |
| 485 | |
| 486 | #define FAIL(msg) _FAIL( \ |
| 487 | Perl_croak(aTHX_ "%s in regex m/%"UTF8f"%s/", \ |
| 488 | msg, UTF8fARG(UTF, len, RExC_precomp), ellipses)) |
| 489 | |
| 490 | #define FAIL2(msg,arg) _FAIL( \ |
| 491 | Perl_croak(aTHX_ msg " in regex m/%"UTF8f"%s/", \ |
| 492 | arg, UTF8fARG(UTF, len, RExC_precomp), ellipses)) |
| 493 | |
| 494 | /* |
| 495 | * Simple_vFAIL -- like FAIL, but marks the current location in the scan |
| 496 | */ |
| 497 | #define Simple_vFAIL(m) STMT_START { \ |
| 498 | const IV offset = RExC_parse - RExC_precomp; \ |
| 499 | Perl_croak(aTHX_ "%s" REPORT_LOCATION, \ |
| 500 | m, REPORT_LOCATION_ARGS(offset)); \ |
| 501 | } STMT_END |
| 502 | |
| 503 | /* |
| 504 | * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL() |
| 505 | */ |
| 506 | #define vFAIL(m) STMT_START { \ |
| 507 | if (!SIZE_ONLY) \ |
| 508 | SAVEFREESV(RExC_rx_sv); \ |
| 509 | Simple_vFAIL(m); \ |
| 510 | } STMT_END |
| 511 | |
| 512 | /* |
| 513 | * Like Simple_vFAIL(), but accepts two arguments. |
| 514 | */ |
| 515 | #define Simple_vFAIL2(m,a1) STMT_START { \ |
| 516 | const IV offset = RExC_parse - RExC_precomp; \ |
| 517 | S_re_croak2(aTHX_ UTF, m, REPORT_LOCATION, a1, \ |
| 518 | REPORT_LOCATION_ARGS(offset)); \ |
| 519 | } STMT_END |
| 520 | |
| 521 | /* |
| 522 | * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL2(). |
| 523 | */ |
| 524 | #define vFAIL2(m,a1) STMT_START { \ |
| 525 | if (!SIZE_ONLY) \ |
| 526 | SAVEFREESV(RExC_rx_sv); \ |
| 527 | Simple_vFAIL2(m, a1); \ |
| 528 | } STMT_END |
| 529 | |
| 530 | |
| 531 | /* |
| 532 | * Like Simple_vFAIL(), but accepts three arguments. |
| 533 | */ |
| 534 | #define Simple_vFAIL3(m, a1, a2) STMT_START { \ |
| 535 | const IV offset = RExC_parse - RExC_precomp; \ |
| 536 | S_re_croak2(aTHX_ UTF, m, REPORT_LOCATION, a1, a2, \ |
| 537 | REPORT_LOCATION_ARGS(offset)); \ |
| 538 | } STMT_END |
| 539 | |
| 540 | /* |
| 541 | * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL3(). |
| 542 | */ |
| 543 | #define vFAIL3(m,a1,a2) STMT_START { \ |
| 544 | if (!SIZE_ONLY) \ |
| 545 | SAVEFREESV(RExC_rx_sv); \ |
| 546 | Simple_vFAIL3(m, a1, a2); \ |
| 547 | } STMT_END |
| 548 | |
| 549 | /* |
| 550 | * Like Simple_vFAIL(), but accepts four arguments. |
| 551 | */ |
| 552 | #define Simple_vFAIL4(m, a1, a2, a3) STMT_START { \ |
| 553 | const IV offset = RExC_parse - RExC_precomp; \ |
| 554 | S_re_croak2(aTHX_ UTF, m, REPORT_LOCATION, a1, a2, a3, \ |
| 555 | REPORT_LOCATION_ARGS(offset)); \ |
| 556 | } STMT_END |
| 557 | |
| 558 | #define vFAIL4(m,a1,a2,a3) STMT_START { \ |
| 559 | if (!SIZE_ONLY) \ |
| 560 | SAVEFREESV(RExC_rx_sv); \ |
| 561 | Simple_vFAIL4(m, a1, a2, a3); \ |
| 562 | } STMT_END |
| 563 | |
| 564 | /* A specialized version of vFAIL2 that works with UTF8f */ |
| 565 | #define vFAIL2utf8f(m, a1) STMT_START { \ |
| 566 | const IV offset = RExC_parse - RExC_precomp; \ |
| 567 | if (!SIZE_ONLY) \ |
| 568 | SAVEFREESV(RExC_rx_sv); \ |
| 569 | S_re_croak2(aTHX_ UTF, m, REPORT_LOCATION, a1, \ |
| 570 | REPORT_LOCATION_ARGS(offset)); \ |
| 571 | } STMT_END |
| 572 | |
| 573 | |
| 574 | /* m is not necessarily a "literal string", in this macro */ |
| 575 | #define reg_warn_non_literal_string(loc, m) STMT_START { \ |
| 576 | const IV offset = loc - RExC_precomp; \ |
| 577 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s" REPORT_LOCATION, \ |
| 578 | m, REPORT_LOCATION_ARGS(offset)); \ |
| 579 | } STMT_END |
| 580 | |
| 581 | #define ckWARNreg(loc,m) STMT_START { \ |
| 582 | const IV offset = loc - RExC_precomp; \ |
| 583 | Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
| 584 | REPORT_LOCATION_ARGS(offset)); \ |
| 585 | } STMT_END |
| 586 | |
| 587 | #define vWARN_dep(loc, m) STMT_START { \ |
| 588 | const IV offset = loc - RExC_precomp; \ |
| 589 | Perl_warner(aTHX_ packWARN(WARN_DEPRECATED), m REPORT_LOCATION, \ |
| 590 | REPORT_LOCATION_ARGS(offset)); \ |
| 591 | } STMT_END |
| 592 | |
| 593 | #define ckWARNdep(loc,m) STMT_START { \ |
| 594 | const IV offset = loc - RExC_precomp; \ |
| 595 | Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED), \ |
| 596 | m REPORT_LOCATION, \ |
| 597 | REPORT_LOCATION_ARGS(offset)); \ |
| 598 | } STMT_END |
| 599 | |
| 600 | #define ckWARNregdep(loc,m) STMT_START { \ |
| 601 | const IV offset = loc - RExC_precomp; \ |
| 602 | Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_REGEXP), \ |
| 603 | m REPORT_LOCATION, \ |
| 604 | REPORT_LOCATION_ARGS(offset)); \ |
| 605 | } STMT_END |
| 606 | |
| 607 | #define ckWARN2reg_d(loc,m, a1) STMT_START { \ |
| 608 | const IV offset = loc - RExC_precomp; \ |
| 609 | Perl_ck_warner_d(aTHX_ packWARN(WARN_REGEXP), \ |
| 610 | m REPORT_LOCATION, \ |
| 611 | a1, REPORT_LOCATION_ARGS(offset)); \ |
| 612 | } STMT_END |
| 613 | |
| 614 | #define ckWARN2reg(loc, m, a1) STMT_START { \ |
| 615 | const IV offset = loc - RExC_precomp; \ |
| 616 | Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
| 617 | a1, REPORT_LOCATION_ARGS(offset)); \ |
| 618 | } STMT_END |
| 619 | |
| 620 | #define vWARN3(loc, m, a1, a2) STMT_START { \ |
| 621 | const IV offset = loc - RExC_precomp; \ |
| 622 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
| 623 | a1, a2, REPORT_LOCATION_ARGS(offset)); \ |
| 624 | } STMT_END |
| 625 | |
| 626 | #define ckWARN3reg(loc, m, a1, a2) STMT_START { \ |
| 627 | const IV offset = loc - RExC_precomp; \ |
| 628 | Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
| 629 | a1, a2, REPORT_LOCATION_ARGS(offset)); \ |
| 630 | } STMT_END |
| 631 | |
| 632 | #define vWARN4(loc, m, a1, a2, a3) STMT_START { \ |
| 633 | const IV offset = loc - RExC_precomp; \ |
| 634 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
| 635 | a1, a2, a3, REPORT_LOCATION_ARGS(offset)); \ |
| 636 | } STMT_END |
| 637 | |
| 638 | #define ckWARN4reg(loc, m, a1, a2, a3) STMT_START { \ |
| 639 | const IV offset = loc - RExC_precomp; \ |
| 640 | Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
| 641 | a1, a2, a3, REPORT_LOCATION_ARGS(offset)); \ |
| 642 | } STMT_END |
| 643 | |
| 644 | #define vWARN5(loc, m, a1, a2, a3, a4) STMT_START { \ |
| 645 | const IV offset = loc - RExC_precomp; \ |
| 646 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
| 647 | a1, a2, a3, a4, REPORT_LOCATION_ARGS(offset)); \ |
| 648 | } STMT_END |
| 649 | |
| 650 | |
| 651 | /* Allow for side effects in s */ |
| 652 | #define REGC(c,s) STMT_START { \ |
| 653 | if (!SIZE_ONLY) *(s) = (c); else (void)(s); \ |
| 654 | } STMT_END |
| 655 | |
| 656 | /* Macros for recording node offsets. 20001227 mjd@plover.com |
| 657 | * Nodes are numbered 1, 2, 3, 4. Node #n's position is recorded in |
| 658 | * element 2*n-1 of the array. Element #2n holds the byte length node #n. |
| 659 | * Element 0 holds the number n. |
| 660 | * Position is 1 indexed. |
| 661 | */ |
| 662 | #ifndef RE_TRACK_PATTERN_OFFSETS |
| 663 | #define Set_Node_Offset_To_R(node,byte) |
| 664 | #define Set_Node_Offset(node,byte) |
| 665 | #define Set_Cur_Node_Offset |
| 666 | #define Set_Node_Length_To_R(node,len) |
| 667 | #define Set_Node_Length(node,len) |
| 668 | #define Set_Node_Cur_Length(node,start) |
| 669 | #define Node_Offset(n) |
| 670 | #define Node_Length(n) |
| 671 | #define Set_Node_Offset_Length(node,offset,len) |
| 672 | #define ProgLen(ri) ri->u.proglen |
| 673 | #define SetProgLen(ri,x) ri->u.proglen = x |
| 674 | #else |
| 675 | #define ProgLen(ri) ri->u.offsets[0] |
| 676 | #define SetProgLen(ri,x) ri->u.offsets[0] = x |
| 677 | #define Set_Node_Offset_To_R(node,byte) STMT_START { \ |
| 678 | if (! SIZE_ONLY) { \ |
| 679 | MJD_OFFSET_DEBUG(("** (%d) offset of node %d is %d.\n", \ |
| 680 | __LINE__, (int)(node), (int)(byte))); \ |
| 681 | if((node) < 0) { \ |
| 682 | Perl_croak(aTHX_ "value of node is %d in Offset macro", \ |
| 683 | (int)(node)); \ |
| 684 | } else { \ |
| 685 | RExC_offsets[2*(node)-1] = (byte); \ |
| 686 | } \ |
| 687 | } \ |
| 688 | } STMT_END |
| 689 | |
| 690 | #define Set_Node_Offset(node,byte) \ |
| 691 | Set_Node_Offset_To_R((node)-RExC_emit_start, (byte)-RExC_start) |
| 692 | #define Set_Cur_Node_Offset Set_Node_Offset(RExC_emit, RExC_parse) |
| 693 | |
| 694 | #define Set_Node_Length_To_R(node,len) STMT_START { \ |
| 695 | if (! SIZE_ONLY) { \ |
| 696 | MJD_OFFSET_DEBUG(("** (%d) size of node %d is %d.\n", \ |
| 697 | __LINE__, (int)(node), (int)(len))); \ |
| 698 | if((node) < 0) { \ |
| 699 | Perl_croak(aTHX_ "value of node is %d in Length macro", \ |
| 700 | (int)(node)); \ |
| 701 | } else { \ |
| 702 | RExC_offsets[2*(node)] = (len); \ |
| 703 | } \ |
| 704 | } \ |
| 705 | } STMT_END |
| 706 | |
| 707 | #define Set_Node_Length(node,len) \ |
| 708 | Set_Node_Length_To_R((node)-RExC_emit_start, len) |
| 709 | #define Set_Node_Cur_Length(node, start) \ |
| 710 | Set_Node_Length(node, RExC_parse - start) |
| 711 | |
| 712 | /* Get offsets and lengths */ |
| 713 | #define Node_Offset(n) (RExC_offsets[2*((n)-RExC_emit_start)-1]) |
| 714 | #define Node_Length(n) (RExC_offsets[2*((n)-RExC_emit_start)]) |
| 715 | |
| 716 | #define Set_Node_Offset_Length(node,offset,len) STMT_START { \ |
| 717 | Set_Node_Offset_To_R((node)-RExC_emit_start, (offset)); \ |
| 718 | Set_Node_Length_To_R((node)-RExC_emit_start, (len)); \ |
| 719 | } STMT_END |
| 720 | #endif |
| 721 | |
| 722 | #if PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS |
| 723 | #define EXPERIMENTAL_INPLACESCAN |
| 724 | #endif /*PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS*/ |
| 725 | |
| 726 | #define DEBUG_RExC_seen() \ |
| 727 | DEBUG_OPTIMISE_MORE_r({ \ |
| 728 | PerlIO_printf(Perl_debug_log,"RExC_seen: "); \ |
| 729 | \ |
| 730 | if (RExC_seen & REG_ZERO_LEN_SEEN) \ |
| 731 | PerlIO_printf(Perl_debug_log,"REG_ZERO_LEN_SEEN "); \ |
| 732 | \ |
| 733 | if (RExC_seen & REG_LOOKBEHIND_SEEN) \ |
| 734 | PerlIO_printf(Perl_debug_log,"REG_LOOKBEHIND_SEEN "); \ |
| 735 | \ |
| 736 | if (RExC_seen & REG_GPOS_SEEN) \ |
| 737 | PerlIO_printf(Perl_debug_log,"REG_GPOS_SEEN "); \ |
| 738 | \ |
| 739 | if (RExC_seen & REG_CANY_SEEN) \ |
| 740 | PerlIO_printf(Perl_debug_log,"REG_CANY_SEEN "); \ |
| 741 | \ |
| 742 | if (RExC_seen & REG_RECURSE_SEEN) \ |
| 743 | PerlIO_printf(Perl_debug_log,"REG_RECURSE_SEEN "); \ |
| 744 | \ |
| 745 | if (RExC_seen & REG_TOP_LEVEL_BRANCHES_SEEN) \ |
| 746 | PerlIO_printf(Perl_debug_log,"REG_TOP_LEVEL_BRANCHES_SEEN "); \ |
| 747 | \ |
| 748 | if (RExC_seen & REG_VERBARG_SEEN) \ |
| 749 | PerlIO_printf(Perl_debug_log,"REG_VERBARG_SEEN "); \ |
| 750 | \ |
| 751 | if (RExC_seen & REG_CUTGROUP_SEEN) \ |
| 752 | PerlIO_printf(Perl_debug_log,"REG_CUTGROUP_SEEN "); \ |
| 753 | \ |
| 754 | if (RExC_seen & REG_RUN_ON_COMMENT_SEEN) \ |
| 755 | PerlIO_printf(Perl_debug_log,"REG_RUN_ON_COMMENT_SEEN "); \ |
| 756 | \ |
| 757 | if (RExC_seen & REG_UNFOLDED_MULTI_SEEN) \ |
| 758 | PerlIO_printf(Perl_debug_log,"REG_UNFOLDED_MULTI_SEEN "); \ |
| 759 | \ |
| 760 | if (RExC_seen & REG_GOSTART_SEEN) \ |
| 761 | PerlIO_printf(Perl_debug_log,"REG_GOSTART_SEEN "); \ |
| 762 | \ |
| 763 | if (RExC_seen & REG_UNBOUNDED_QUANTIFIER_SEEN) \ |
| 764 | PerlIO_printf(Perl_debug_log,"REG_UNBOUNDED_QUANTIFIER_SEEN "); \ |
| 765 | \ |
| 766 | PerlIO_printf(Perl_debug_log,"\n"); \ |
| 767 | }); |
| 768 | |
| 769 | #define DEBUG_STUDYDATA(str,data,depth) \ |
| 770 | DEBUG_OPTIMISE_MORE_r(if(data){ \ |
| 771 | PerlIO_printf(Perl_debug_log, \ |
| 772 | "%*s" str "Pos:%"IVdf"/%"IVdf \ |
| 773 | " Flags: 0x%"UVXf" Whilem_c: %"IVdf" Lcp: %"IVdf" %s", \ |
| 774 | (int)(depth)*2, "", \ |
| 775 | (IV)((data)->pos_min), \ |
| 776 | (IV)((data)->pos_delta), \ |
| 777 | (UV)((data)->flags), \ |
| 778 | (IV)((data)->whilem_c), \ |
| 779 | (IV)((data)->last_closep ? *((data)->last_closep) : -1), \ |
| 780 | is_inf ? "INF " : "" \ |
| 781 | ); \ |
| 782 | if ((data)->last_found) \ |
| 783 | PerlIO_printf(Perl_debug_log, \ |
| 784 | "Last:'%s' %"IVdf":%"IVdf"/%"IVdf" %sFixed:'%s' @ %"IVdf \ |
| 785 | " %sFloat: '%s' @ %"IVdf"/%"IVdf"", \ |
| 786 | SvPVX_const((data)->last_found), \ |
| 787 | (IV)((data)->last_end), \ |
| 788 | (IV)((data)->last_start_min), \ |
| 789 | (IV)((data)->last_start_max), \ |
| 790 | ((data)->longest && \ |
| 791 | (data)->longest==&((data)->longest_fixed)) ? "*" : "", \ |
| 792 | SvPVX_const((data)->longest_fixed), \ |
| 793 | (IV)((data)->offset_fixed), \ |
| 794 | ((data)->longest && \ |
| 795 | (data)->longest==&((data)->longest_float)) ? "*" : "", \ |
| 796 | SvPVX_const((data)->longest_float), \ |
| 797 | (IV)((data)->offset_float_min), \ |
| 798 | (IV)((data)->offset_float_max) \ |
| 799 | ); \ |
| 800 | PerlIO_printf(Perl_debug_log,"\n"); \ |
| 801 | }); |
| 802 | |
| 803 | /* Mark that we cannot extend a found fixed substring at this point. |
| 804 | Update the longest found anchored substring and the longest found |
| 805 | floating substrings if needed. */ |
| 806 | |
| 807 | STATIC void |
| 808 | S_scan_commit(pTHX_ const RExC_state_t *pRExC_state, scan_data_t *data, |
| 809 | SSize_t *minlenp, int is_inf) |
| 810 | { |
| 811 | const STRLEN l = CHR_SVLEN(data->last_found); |
| 812 | const STRLEN old_l = CHR_SVLEN(*data->longest); |
| 813 | GET_RE_DEBUG_FLAGS_DECL; |
| 814 | |
| 815 | PERL_ARGS_ASSERT_SCAN_COMMIT; |
| 816 | |
| 817 | if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) { |
| 818 | SvSetMagicSV(*data->longest, data->last_found); |
| 819 | if (*data->longest == data->longest_fixed) { |
| 820 | data->offset_fixed = l ? data->last_start_min : data->pos_min; |
| 821 | if (data->flags & SF_BEFORE_EOL) |
| 822 | data->flags |
| 823 | |= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL); |
| 824 | else |
| 825 | data->flags &= ~SF_FIX_BEFORE_EOL; |
| 826 | data->minlen_fixed=minlenp; |
| 827 | data->lookbehind_fixed=0; |
| 828 | } |
| 829 | else { /* *data->longest == data->longest_float */ |
| 830 | data->offset_float_min = l ? data->last_start_min : data->pos_min; |
| 831 | data->offset_float_max = (l |
| 832 | ? data->last_start_max |
| 833 | : (data->pos_delta == SSize_t_MAX |
| 834 | ? SSize_t_MAX |
| 835 | : data->pos_min + data->pos_delta)); |
| 836 | if (is_inf |
| 837 | || (STRLEN)data->offset_float_max > (STRLEN)SSize_t_MAX) |
| 838 | data->offset_float_max = SSize_t_MAX; |
| 839 | if (data->flags & SF_BEFORE_EOL) |
| 840 | data->flags |
| 841 | |= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL); |
| 842 | else |
| 843 | data->flags &= ~SF_FL_BEFORE_EOL; |
| 844 | data->minlen_float=minlenp; |
| 845 | data->lookbehind_float=0; |
| 846 | } |
| 847 | } |
| 848 | SvCUR_set(data->last_found, 0); |
| 849 | { |
| 850 | SV * const sv = data->last_found; |
| 851 | if (SvUTF8(sv) && SvMAGICAL(sv)) { |
| 852 | MAGIC * const mg = mg_find(sv, PERL_MAGIC_utf8); |
| 853 | if (mg) |
| 854 | mg->mg_len = 0; |
| 855 | } |
| 856 | } |
| 857 | data->last_end = -1; |
| 858 | data->flags &= ~SF_BEFORE_EOL; |
| 859 | DEBUG_STUDYDATA("commit: ",data,0); |
| 860 | } |
| 861 | |
| 862 | /* An SSC is just a regnode_charclass_posix with an extra field: the inversion |
| 863 | * list that describes which code points it matches */ |
| 864 | |
| 865 | STATIC void |
| 866 | S_ssc_anything(pTHX_ regnode_ssc *ssc) |
| 867 | { |
| 868 | /* Set the SSC 'ssc' to match an empty string or any code point */ |
| 869 | |
| 870 | PERL_ARGS_ASSERT_SSC_ANYTHING; |
| 871 | |
| 872 | assert(is_ANYOF_SYNTHETIC(ssc)); |
| 873 | |
| 874 | ssc->invlist = sv_2mortal(_new_invlist(2)); /* mortalize so won't leak */ |
| 875 | _append_range_to_invlist(ssc->invlist, 0, UV_MAX); |
| 876 | ANYOF_FLAGS(ssc) |= ANYOF_EMPTY_STRING; /* Plus match empty string */ |
| 877 | } |
| 878 | |
| 879 | STATIC int |
| 880 | S_ssc_is_anything(const regnode_ssc *ssc) |
| 881 | { |
| 882 | /* Returns TRUE if the SSC 'ssc' can match the empty string and any code |
| 883 | * point; FALSE otherwise. Thus, this is used to see if using 'ssc' buys |
| 884 | * us anything: if the function returns TRUE, 'ssc' hasn't been restricted |
| 885 | * in any way, so there's no point in using it */ |
| 886 | |
| 887 | UV start, end; |
| 888 | bool ret; |
| 889 | |
| 890 | PERL_ARGS_ASSERT_SSC_IS_ANYTHING; |
| 891 | |
| 892 | assert(is_ANYOF_SYNTHETIC(ssc)); |
| 893 | |
| 894 | if (! (ANYOF_FLAGS(ssc) & ANYOF_EMPTY_STRING)) { |
| 895 | return FALSE; |
| 896 | } |
| 897 | |
| 898 | /* See if the list consists solely of the range 0 - Infinity */ |
| 899 | invlist_iterinit(ssc->invlist); |
| 900 | ret = invlist_iternext(ssc->invlist, &start, &end) |
| 901 | && start == 0 |
| 902 | && end == UV_MAX; |
| 903 | |
| 904 | invlist_iterfinish(ssc->invlist); |
| 905 | |
| 906 | if (ret) { |
| 907 | return TRUE; |
| 908 | } |
| 909 | |
| 910 | /* If e.g., both \w and \W are set, matches everything */ |
| 911 | if (ANYOF_POSIXL_SSC_TEST_ANY_SET(ssc)) { |
| 912 | int i; |
| 913 | for (i = 0; i < ANYOF_POSIXL_MAX; i += 2) { |
| 914 | if (ANYOF_POSIXL_TEST(ssc, i) && ANYOF_POSIXL_TEST(ssc, i+1)) { |
| 915 | return TRUE; |
| 916 | } |
| 917 | } |
| 918 | } |
| 919 | |
| 920 | return FALSE; |
| 921 | } |
| 922 | |
| 923 | STATIC void |
| 924 | S_ssc_init(pTHX_ const RExC_state_t *pRExC_state, regnode_ssc *ssc) |
| 925 | { |
| 926 | /* Initializes the SSC 'ssc'. This includes setting it to match an empty |
| 927 | * string, any code point, or any posix class under locale */ |
| 928 | |
| 929 | PERL_ARGS_ASSERT_SSC_INIT; |
| 930 | |
| 931 | Zero(ssc, 1, regnode_ssc); |
| 932 | set_ANYOF_SYNTHETIC(ssc); |
| 933 | ARG_SET(ssc, ANYOF_NONBITMAP_EMPTY); |
| 934 | ssc_anything(ssc); |
| 935 | |
| 936 | /* If any portion of the regex is to operate under locale rules, |
| 937 | * initialization includes it. The reason this isn't done for all regexes |
| 938 | * is that the optimizer was written under the assumption that locale was |
| 939 | * all-or-nothing. Given the complexity and lack of documentation in the |
| 940 | * optimizer, and that there are inadequate test cases for locale, many |
| 941 | * parts of it may not work properly, it is safest to avoid locale unless |
| 942 | * necessary. */ |
| 943 | if (RExC_contains_locale) { |
| 944 | ANYOF_POSIXL_SETALL(ssc); |
| 945 | } |
| 946 | else { |
| 947 | ANYOF_POSIXL_ZERO(ssc); |
| 948 | } |
| 949 | } |
| 950 | |
| 951 | STATIC int |
| 952 | S_ssc_is_cp_posixl_init(const RExC_state_t *pRExC_state, |
| 953 | const regnode_ssc *ssc) |
| 954 | { |
| 955 | /* Returns TRUE if the SSC 'ssc' is in its initial state with regard only |
| 956 | * to the list of code points matched, and locale posix classes; hence does |
| 957 | * not check its flags) */ |
| 958 | |
| 959 | UV start, end; |
| 960 | bool ret; |
| 961 | |
| 962 | PERL_ARGS_ASSERT_SSC_IS_CP_POSIXL_INIT; |
| 963 | |
| 964 | assert(is_ANYOF_SYNTHETIC(ssc)); |
| 965 | |
| 966 | invlist_iterinit(ssc->invlist); |
| 967 | ret = invlist_iternext(ssc->invlist, &start, &end) |
| 968 | && start == 0 |
| 969 | && end == UV_MAX; |
| 970 | |
| 971 | invlist_iterfinish(ssc->invlist); |
| 972 | |
| 973 | if (! ret) { |
| 974 | return FALSE; |
| 975 | } |
| 976 | |
| 977 | if (RExC_contains_locale && ! ANYOF_POSIXL_SSC_TEST_ALL_SET(ssc)) { |
| 978 | return FALSE; |
| 979 | } |
| 980 | |
| 981 | return TRUE; |
| 982 | } |
| 983 | |
| 984 | STATIC SV* |
| 985 | S_get_ANYOF_cp_list_for_ssc(pTHX_ const RExC_state_t *pRExC_state, |
| 986 | const regnode_charclass* const node) |
| 987 | { |
| 988 | /* Returns a mortal inversion list defining which code points are matched |
| 989 | * by 'node', which is of type ANYOF. Handles complementing the result if |
| 990 | * appropriate. If some code points aren't knowable at this time, the |
| 991 | * returned list must, and will, contain every code point that is a |
| 992 | * possibility. */ |
| 993 | |
| 994 | SV* invlist = sv_2mortal(_new_invlist(0)); |
| 995 | SV* only_utf8_locale_invlist = NULL; |
| 996 | unsigned int i; |
| 997 | const U32 n = ARG(node); |
| 998 | bool new_node_has_latin1 = FALSE; |
| 999 | |
| 1000 | PERL_ARGS_ASSERT_GET_ANYOF_CP_LIST_FOR_SSC; |
| 1001 | |
| 1002 | /* Look at the data structure created by S_set_ANYOF_arg() */ |
| 1003 | if (n != ANYOF_NONBITMAP_EMPTY) { |
| 1004 | SV * const rv = MUTABLE_SV(RExC_rxi->data->data[n]); |
| 1005 | AV * const av = MUTABLE_AV(SvRV(rv)); |
| 1006 | SV **const ary = AvARRAY(av); |
| 1007 | assert(RExC_rxi->data->what[n] == 's'); |
| 1008 | |
| 1009 | if (ary[1] && ary[1] != &PL_sv_undef) { /* Has compile-time swash */ |
| 1010 | invlist = sv_2mortal(invlist_clone(_get_swash_invlist(ary[1]))); |
| 1011 | } |
| 1012 | else if (ary[0] && ary[0] != &PL_sv_undef) { |
| 1013 | |
| 1014 | /* Here, no compile-time swash, and there are things that won't be |
| 1015 | * known until runtime -- we have to assume it could be anything */ |
| 1016 | return _add_range_to_invlist(invlist, 0, UV_MAX); |
| 1017 | } |
| 1018 | else if (ary[3] && ary[3] != &PL_sv_undef) { |
| 1019 | |
| 1020 | /* Here no compile-time swash, and no run-time only data. Use the |
| 1021 | * node's inversion list */ |
| 1022 | invlist = sv_2mortal(invlist_clone(ary[3])); |
| 1023 | } |
| 1024 | |
| 1025 | /* Get the code points valid only under UTF-8 locales */ |
| 1026 | if ((ANYOF_FLAGS(node) & ANYOF_LOC_FOLD) |
| 1027 | && ary[2] && ary[2] != &PL_sv_undef) |
| 1028 | { |
| 1029 | only_utf8_locale_invlist = ary[2]; |
| 1030 | } |
| 1031 | } |
| 1032 | |
| 1033 | /* An ANYOF node contains a bitmap for the first NUM_ANYOF_CODE_POINTS |
| 1034 | * code points, and an inversion list for the others, but if there are code |
| 1035 | * points that should match only conditionally on the target string being |
| 1036 | * UTF-8, those are placed in the inversion list, and not the bitmap. |
| 1037 | * Since there are circumstances under which they could match, they are |
| 1038 | * included in the SSC. But if the ANYOF node is to be inverted, we have |
| 1039 | * to exclude them here, so that when we invert below, the end result |
| 1040 | * actually does include them. (Think about "\xe0" =~ /[^\xc0]/di;). We |
| 1041 | * have to do this here before we add the unconditionally matched code |
| 1042 | * points */ |
| 1043 | if (ANYOF_FLAGS(node) & ANYOF_INVERT) { |
| 1044 | _invlist_intersection_complement_2nd(invlist, |
| 1045 | PL_UpperLatin1, |
| 1046 | &invlist); |
| 1047 | } |
| 1048 | |
| 1049 | /* Add in the points from the bit map */ |
| 1050 | for (i = 0; i < NUM_ANYOF_CODE_POINTS; i++) { |
| 1051 | if (ANYOF_BITMAP_TEST(node, i)) { |
| 1052 | invlist = add_cp_to_invlist(invlist, i); |
| 1053 | new_node_has_latin1 = TRUE; |
| 1054 | } |
| 1055 | } |
| 1056 | |
| 1057 | /* If this can match all upper Latin1 code points, have to add them |
| 1058 | * as well */ |
| 1059 | if (ANYOF_FLAGS(node) & ANYOF_NON_UTF8_NON_ASCII_ALL) { |
| 1060 | _invlist_union(invlist, PL_UpperLatin1, &invlist); |
| 1061 | } |
| 1062 | |
| 1063 | /* Similarly for these */ |
| 1064 | if (ANYOF_FLAGS(node) & ANYOF_ABOVE_LATIN1_ALL) { |
| 1065 | invlist = _add_range_to_invlist(invlist, 256, UV_MAX); |
| 1066 | } |
| 1067 | |
| 1068 | if (ANYOF_FLAGS(node) & ANYOF_INVERT) { |
| 1069 | _invlist_invert(invlist); |
| 1070 | } |
| 1071 | else if (new_node_has_latin1 && ANYOF_FLAGS(node) & ANYOF_LOC_FOLD) { |
| 1072 | |
| 1073 | /* Under /li, any 0-255 could fold to any other 0-255, depending on the |
| 1074 | * locale. We can skip this if there are no 0-255 at all. */ |
| 1075 | _invlist_union(invlist, PL_Latin1, &invlist); |
| 1076 | } |
| 1077 | |
| 1078 | /* Similarly add the UTF-8 locale possible matches. These have to be |
| 1079 | * deferred until after the non-UTF-8 locale ones are taken care of just |
| 1080 | * above, or it leads to wrong results under ANYOF_INVERT */ |
| 1081 | if (only_utf8_locale_invlist) { |
| 1082 | _invlist_union_maybe_complement_2nd(invlist, |
| 1083 | only_utf8_locale_invlist, |
| 1084 | ANYOF_FLAGS(node) & ANYOF_INVERT, |
| 1085 | &invlist); |
| 1086 | } |
| 1087 | |
| 1088 | return invlist; |
| 1089 | } |
| 1090 | |
| 1091 | /* These two functions currently do the exact same thing */ |
| 1092 | #define ssc_init_zero ssc_init |
| 1093 | |
| 1094 | #define ssc_add_cp(ssc, cp) ssc_add_range((ssc), (cp), (cp)) |
| 1095 | #define ssc_match_all_cp(ssc) ssc_add_range(ssc, 0, UV_MAX) |
| 1096 | |
| 1097 | /* 'AND' a given class with another one. Can create false positives. 'ssc' |
| 1098 | * should not be inverted. 'and_with->flags & ANYOF_POSIXL' should be 0 if |
| 1099 | * 'and_with' is a regnode_charclass instead of a regnode_ssc. */ |
| 1100 | |
| 1101 | STATIC void |
| 1102 | S_ssc_and(pTHX_ const RExC_state_t *pRExC_state, regnode_ssc *ssc, |
| 1103 | const regnode_charclass *and_with) |
| 1104 | { |
| 1105 | /* Accumulate into SSC 'ssc' its 'AND' with 'and_with', which is either |
| 1106 | * another SSC or a regular ANYOF class. Can create false positives. */ |
| 1107 | |
| 1108 | SV* anded_cp_list; |
| 1109 | U8 anded_flags; |
| 1110 | |
| 1111 | PERL_ARGS_ASSERT_SSC_AND; |
| 1112 | |
| 1113 | assert(is_ANYOF_SYNTHETIC(ssc)); |
| 1114 | |
| 1115 | /* 'and_with' is used as-is if it too is an SSC; otherwise have to extract |
| 1116 | * the code point inversion list and just the relevant flags */ |
| 1117 | if (is_ANYOF_SYNTHETIC(and_with)) { |
| 1118 | anded_cp_list = ((regnode_ssc *)and_with)->invlist; |
| 1119 | anded_flags = ANYOF_FLAGS(and_with); |
| 1120 | |
| 1121 | /* XXX This is a kludge around what appears to be deficiencies in the |
| 1122 | * optimizer. If we make S_ssc_anything() add in the WARN_SUPER flag, |
| 1123 | * there are paths through the optimizer where it doesn't get weeded |
| 1124 | * out when it should. And if we don't make some extra provision for |
| 1125 | * it like the code just below, it doesn't get added when it should. |
| 1126 | * This solution is to add it only when AND'ing, which is here, and |
| 1127 | * only when what is being AND'ed is the pristine, original node |
| 1128 | * matching anything. Thus it is like adding it to ssc_anything() but |
| 1129 | * only when the result is to be AND'ed. Probably the same solution |
| 1130 | * could be adopted for the same problem we have with /l matching, |
| 1131 | * which is solved differently in S_ssc_init(), and that would lead to |
| 1132 | * fewer false positives than that solution has. But if this solution |
| 1133 | * creates bugs, the consequences are only that a warning isn't raised |
| 1134 | * that should be; while the consequences for having /l bugs is |
| 1135 | * incorrect matches */ |
| 1136 | if (ssc_is_anything((regnode_ssc *)and_with)) { |
| 1137 | anded_flags |= ANYOF_WARN_SUPER; |
| 1138 | } |
| 1139 | } |
| 1140 | else { |
| 1141 | anded_cp_list = get_ANYOF_cp_list_for_ssc(pRExC_state, and_with); |
| 1142 | anded_flags = ANYOF_FLAGS(and_with) & ANYOF_COMMON_FLAGS; |
| 1143 | } |
| 1144 | |
| 1145 | ANYOF_FLAGS(ssc) &= anded_flags; |
| 1146 | |
| 1147 | /* Below, C1 is the list of code points in 'ssc'; P1, its posix classes. |
| 1148 | * C2 is the list of code points in 'and-with'; P2, its posix classes. |
| 1149 | * 'and_with' may be inverted. When not inverted, we have the situation of |
| 1150 | * computing: |
| 1151 | * (C1 | P1) & (C2 | P2) |
| 1152 | * = (C1 & (C2 | P2)) | (P1 & (C2 | P2)) |
| 1153 | * = ((C1 & C2) | (C1 & P2)) | ((P1 & C2) | (P1 & P2)) |
| 1154 | * <= ((C1 & C2) | P2)) | ( P1 | (P1 & P2)) |
| 1155 | * <= ((C1 & C2) | P1 | P2) |
| 1156 | * Alternatively, the last few steps could be: |
| 1157 | * = ((C1 & C2) | (C1 & P2)) | ((P1 & C2) | (P1 & P2)) |
| 1158 | * <= ((C1 & C2) | C1 ) | ( C2 | (P1 & P2)) |
| 1159 | * <= (C1 | C2 | (P1 & P2)) |
| 1160 | * We favor the second approach if either P1 or P2 is non-empty. This is |
| 1161 | * because these components are a barrier to doing optimizations, as what |
| 1162 | * they match cannot be known until the moment of matching as they are |
| 1163 | * dependent on the current locale, 'AND"ing them likely will reduce or |
| 1164 | * eliminate them. |
| 1165 | * But we can do better if we know that C1,P1 are in their initial state (a |
| 1166 | * frequent occurrence), each matching everything: |
| 1167 | * (<everything>) & (C2 | P2) = C2 | P2 |
| 1168 | * Similarly, if C2,P2 are in their initial state (again a frequent |
| 1169 | * occurrence), the result is a no-op |
| 1170 | * (C1 | P1) & (<everything>) = C1 | P1 |
| 1171 | * |
| 1172 | * Inverted, we have |
| 1173 | * (C1 | P1) & ~(C2 | P2) = (C1 | P1) & (~C2 & ~P2) |
| 1174 | * = (C1 & (~C2 & ~P2)) | (P1 & (~C2 & ~P2)) |
| 1175 | * <= (C1 & ~C2) | (P1 & ~P2) |
| 1176 | * */ |
| 1177 | |
| 1178 | if ((ANYOF_FLAGS(and_with) & ANYOF_INVERT) |
| 1179 | && ! is_ANYOF_SYNTHETIC(and_with)) |
| 1180 | { |
| 1181 | unsigned int i; |
| 1182 | |
| 1183 | ssc_intersection(ssc, |
| 1184 | anded_cp_list, |
| 1185 | FALSE /* Has already been inverted */ |
| 1186 | ); |
| 1187 | |
| 1188 | /* If either P1 or P2 is empty, the intersection will be also; can skip |
| 1189 | * the loop */ |
| 1190 | if (! (ANYOF_FLAGS(and_with) & ANYOF_POSIXL)) { |
| 1191 | ANYOF_POSIXL_ZERO(ssc); |
| 1192 | } |
| 1193 | else if (ANYOF_POSIXL_SSC_TEST_ANY_SET(ssc)) { |
| 1194 | |
| 1195 | /* Note that the Posix class component P from 'and_with' actually |
| 1196 | * looks like: |
| 1197 | * P = Pa | Pb | ... | Pn |
| 1198 | * where each component is one posix class, such as in [\w\s]. |
| 1199 | * Thus |
| 1200 | * ~P = ~(Pa | Pb | ... | Pn) |
| 1201 | * = ~Pa & ~Pb & ... & ~Pn |
| 1202 | * <= ~Pa | ~Pb | ... | ~Pn |
| 1203 | * The last is something we can easily calculate, but unfortunately |
| 1204 | * is likely to have many false positives. We could do better |
| 1205 | * in some (but certainly not all) instances if two classes in |
| 1206 | * P have known relationships. For example |
| 1207 | * :lower: <= :alpha: <= :alnum: <= \w <= :graph: <= :print: |
| 1208 | * So |
| 1209 | * :lower: & :print: = :lower: |
| 1210 | * And similarly for classes that must be disjoint. For example, |
| 1211 | * since \s and \w can have no elements in common based on rules in |
| 1212 | * the POSIX standard, |
| 1213 | * \w & ^\S = nothing |
| 1214 | * Unfortunately, some vendor locales do not meet the Posix |
| 1215 | * standard, in particular almost everything by Microsoft. |
| 1216 | * The loop below just changes e.g., \w into \W and vice versa */ |
| 1217 | |
| 1218 | regnode_charclass_posixl temp; |
| 1219 | int add = 1; /* To calculate the index of the complement */ |
| 1220 | |
| 1221 | ANYOF_POSIXL_ZERO(&temp); |
| 1222 | for (i = 0; i < ANYOF_MAX; i++) { |
| 1223 | assert(i % 2 != 0 |
| 1224 | || ! ANYOF_POSIXL_TEST((regnode_charclass_posixl*) and_with, i) |
| 1225 | || ! ANYOF_POSIXL_TEST((regnode_charclass_posixl*) and_with, i + 1)); |
| 1226 | |
| 1227 | if (ANYOF_POSIXL_TEST((regnode_charclass_posixl*) and_with, i)) { |
| 1228 | ANYOF_POSIXL_SET(&temp, i + add); |
| 1229 | } |
| 1230 | add = 0 - add; /* 1 goes to -1; -1 goes to 1 */ |
| 1231 | } |
| 1232 | ANYOF_POSIXL_AND(&temp, ssc); |
| 1233 | |
| 1234 | } /* else ssc already has no posixes */ |
| 1235 | } /* else: Not inverted. This routine is a no-op if 'and_with' is an SSC |
| 1236 | in its initial state */ |
| 1237 | else if (! is_ANYOF_SYNTHETIC(and_with) |
| 1238 | || ! ssc_is_cp_posixl_init(pRExC_state, (regnode_ssc *)and_with)) |
| 1239 | { |
| 1240 | /* But if 'ssc' is in its initial state, the result is just 'and_with'; |
| 1241 | * copy it over 'ssc' */ |
| 1242 | if (ssc_is_cp_posixl_init(pRExC_state, ssc)) { |
| 1243 | if (is_ANYOF_SYNTHETIC(and_with)) { |
| 1244 | StructCopy(and_with, ssc, regnode_ssc); |
| 1245 | } |
| 1246 | else { |
| 1247 | ssc->invlist = anded_cp_list; |
| 1248 | ANYOF_POSIXL_ZERO(ssc); |
| 1249 | if (ANYOF_FLAGS(and_with) & ANYOF_POSIXL) { |
| 1250 | ANYOF_POSIXL_OR((regnode_charclass_posixl*) and_with, ssc); |
| 1251 | } |
| 1252 | } |
| 1253 | } |
| 1254 | else if (ANYOF_POSIXL_SSC_TEST_ANY_SET(ssc) |
| 1255 | || (ANYOF_FLAGS(and_with) & ANYOF_POSIXL)) |
| 1256 | { |
| 1257 | /* One or the other of P1, P2 is non-empty. */ |
| 1258 | if (ANYOF_FLAGS(and_with) & ANYOF_POSIXL) { |
| 1259 | ANYOF_POSIXL_AND((regnode_charclass_posixl*) and_with, ssc); |
| 1260 | } |
| 1261 | ssc_union(ssc, anded_cp_list, FALSE); |
| 1262 | } |
| 1263 | else { /* P1 = P2 = empty */ |
| 1264 | ssc_intersection(ssc, anded_cp_list, FALSE); |
| 1265 | } |
| 1266 | } |
| 1267 | } |
| 1268 | |
| 1269 | STATIC void |
| 1270 | S_ssc_or(pTHX_ const RExC_state_t *pRExC_state, regnode_ssc *ssc, |
| 1271 | const regnode_charclass *or_with) |
| 1272 | { |
| 1273 | /* Accumulate into SSC 'ssc' its 'OR' with 'or_with', which is either |
| 1274 | * another SSC or a regular ANYOF class. Can create false positives if |
| 1275 | * 'or_with' is to be inverted. */ |
| 1276 | |
| 1277 | SV* ored_cp_list; |
| 1278 | U8 ored_flags; |
| 1279 | |
| 1280 | PERL_ARGS_ASSERT_SSC_OR; |
| 1281 | |
| 1282 | assert(is_ANYOF_SYNTHETIC(ssc)); |
| 1283 | |
| 1284 | /* 'or_with' is used as-is if it too is an SSC; otherwise have to extract |
| 1285 | * the code point inversion list and just the relevant flags */ |
| 1286 | if (is_ANYOF_SYNTHETIC(or_with)) { |
| 1287 | ored_cp_list = ((regnode_ssc*) or_with)->invlist; |
| 1288 | ored_flags = ANYOF_FLAGS(or_with); |
| 1289 | } |
| 1290 | else { |
| 1291 | ored_cp_list = get_ANYOF_cp_list_for_ssc(pRExC_state, or_with); |
| 1292 | ored_flags = ANYOF_FLAGS(or_with) & ANYOF_COMMON_FLAGS; |
| 1293 | } |
| 1294 | |
| 1295 | ANYOF_FLAGS(ssc) |= ored_flags; |
| 1296 | |
| 1297 | /* Below, C1 is the list of code points in 'ssc'; P1, its posix classes. |
| 1298 | * C2 is the list of code points in 'or-with'; P2, its posix classes. |
| 1299 | * 'or_with' may be inverted. When not inverted, we have the simple |
| 1300 | * situation of computing: |
| 1301 | * (C1 | P1) | (C2 | P2) = (C1 | C2) | (P1 | P2) |
| 1302 | * If P1|P2 yields a situation with both a class and its complement are |
| 1303 | * set, like having both \w and \W, this matches all code points, and we |
| 1304 | * can delete these from the P component of the ssc going forward. XXX We |
| 1305 | * might be able to delete all the P components, but I (khw) am not certain |
| 1306 | * about this, and it is better to be safe. |
| 1307 | * |
| 1308 | * Inverted, we have |
| 1309 | * (C1 | P1) | ~(C2 | P2) = (C1 | P1) | (~C2 & ~P2) |
| 1310 | * <= (C1 | P1) | ~C2 |
| 1311 | * <= (C1 | ~C2) | P1 |
| 1312 | * (which results in actually simpler code than the non-inverted case) |
| 1313 | * */ |
| 1314 | |
| 1315 | if ((ANYOF_FLAGS(or_with) & ANYOF_INVERT) |
| 1316 | && ! is_ANYOF_SYNTHETIC(or_with)) |
| 1317 | { |
| 1318 | /* We ignore P2, leaving P1 going forward */ |
| 1319 | } /* else Not inverted */ |
| 1320 | else if (ANYOF_FLAGS(or_with) & ANYOF_POSIXL) { |
| 1321 | ANYOF_POSIXL_OR((regnode_charclass_posixl*)or_with, ssc); |
| 1322 | if (ANYOF_POSIXL_SSC_TEST_ANY_SET(ssc)) { |
| 1323 | unsigned int i; |
| 1324 | for (i = 0; i < ANYOF_MAX; i += 2) { |
| 1325 | if (ANYOF_POSIXL_TEST(ssc, i) && ANYOF_POSIXL_TEST(ssc, i + 1)) |
| 1326 | { |
| 1327 | ssc_match_all_cp(ssc); |
| 1328 | ANYOF_POSIXL_CLEAR(ssc, i); |
| 1329 | ANYOF_POSIXL_CLEAR(ssc, i+1); |
| 1330 | } |
| 1331 | } |
| 1332 | } |
| 1333 | } |
| 1334 | |
| 1335 | ssc_union(ssc, |
| 1336 | ored_cp_list, |
| 1337 | FALSE /* Already has been inverted */ |
| 1338 | ); |
| 1339 | } |
| 1340 | |
| 1341 | PERL_STATIC_INLINE void |
| 1342 | S_ssc_union(pTHX_ regnode_ssc *ssc, SV* const invlist, const bool invert2nd) |
| 1343 | { |
| 1344 | PERL_ARGS_ASSERT_SSC_UNION; |
| 1345 | |
| 1346 | assert(is_ANYOF_SYNTHETIC(ssc)); |
| 1347 | |
| 1348 | _invlist_union_maybe_complement_2nd(ssc->invlist, |
| 1349 | invlist, |
| 1350 | invert2nd, |
| 1351 | &ssc->invlist); |
| 1352 | } |
| 1353 | |
| 1354 | PERL_STATIC_INLINE void |
| 1355 | S_ssc_intersection(pTHX_ regnode_ssc *ssc, |
| 1356 | SV* const invlist, |
| 1357 | const bool invert2nd) |
| 1358 | { |
| 1359 | PERL_ARGS_ASSERT_SSC_INTERSECTION; |
| 1360 | |
| 1361 | assert(is_ANYOF_SYNTHETIC(ssc)); |
| 1362 | |
| 1363 | _invlist_intersection_maybe_complement_2nd(ssc->invlist, |
| 1364 | invlist, |
| 1365 | invert2nd, |
| 1366 | &ssc->invlist); |
| 1367 | } |
| 1368 | |
| 1369 | PERL_STATIC_INLINE void |
| 1370 | S_ssc_add_range(pTHX_ regnode_ssc *ssc, const UV start, const UV end) |
| 1371 | { |
| 1372 | PERL_ARGS_ASSERT_SSC_ADD_RANGE; |
| 1373 | |
| 1374 | assert(is_ANYOF_SYNTHETIC(ssc)); |
| 1375 | |
| 1376 | ssc->invlist = _add_range_to_invlist(ssc->invlist, start, end); |
| 1377 | } |
| 1378 | |
| 1379 | PERL_STATIC_INLINE void |
| 1380 | S_ssc_cp_and(pTHX_ regnode_ssc *ssc, const UV cp) |
| 1381 | { |
| 1382 | /* AND just the single code point 'cp' into the SSC 'ssc' */ |
| 1383 | |
| 1384 | SV* cp_list = _new_invlist(2); |
| 1385 | |
| 1386 | PERL_ARGS_ASSERT_SSC_CP_AND; |
| 1387 | |
| 1388 | assert(is_ANYOF_SYNTHETIC(ssc)); |
| 1389 | |
| 1390 | cp_list = add_cp_to_invlist(cp_list, cp); |
| 1391 | ssc_intersection(ssc, cp_list, |
| 1392 | FALSE /* Not inverted */ |
| 1393 | ); |
| 1394 | SvREFCNT_dec_NN(cp_list); |
| 1395 | } |
| 1396 | |
| 1397 | PERL_STATIC_INLINE void |
| 1398 | S_ssc_clear_locale(regnode_ssc *ssc) |
| 1399 | { |
| 1400 | /* Set the SSC 'ssc' to not match any locale things */ |
| 1401 | PERL_ARGS_ASSERT_SSC_CLEAR_LOCALE; |
| 1402 | |
| 1403 | assert(is_ANYOF_SYNTHETIC(ssc)); |
| 1404 | |
| 1405 | ANYOF_POSIXL_ZERO(ssc); |
| 1406 | ANYOF_FLAGS(ssc) &= ~ANYOF_LOCALE_FLAGS; |
| 1407 | } |
| 1408 | |
| 1409 | STATIC void |
| 1410 | S_ssc_finalize(pTHX_ RExC_state_t *pRExC_state, regnode_ssc *ssc) |
| 1411 | { |
| 1412 | /* The inversion list in the SSC is marked mortal; now we need a more |
| 1413 | * permanent copy, which is stored the same way that is done in a regular |
| 1414 | * ANYOF node, with the first NUM_ANYOF_CODE_POINTS code points in a bit |
| 1415 | * map */ |
| 1416 | |
| 1417 | SV* invlist = invlist_clone(ssc->invlist); |
| 1418 | |
| 1419 | PERL_ARGS_ASSERT_SSC_FINALIZE; |
| 1420 | |
| 1421 | assert(is_ANYOF_SYNTHETIC(ssc)); |
| 1422 | |
| 1423 | /* The code in this file assumes that all but these flags aren't relevant |
| 1424 | * to the SSC, except ANYOF_EMPTY_STRING, which should be cleared by the |
| 1425 | * time we reach here */ |
| 1426 | assert(! (ANYOF_FLAGS(ssc) & ~ANYOF_COMMON_FLAGS)); |
| 1427 | |
| 1428 | populate_ANYOF_from_invlist( (regnode *) ssc, &invlist); |
| 1429 | |
| 1430 | set_ANYOF_arg(pRExC_state, (regnode *) ssc, invlist, |
| 1431 | NULL, NULL, NULL, FALSE); |
| 1432 | |
| 1433 | /* Make sure is clone-safe */ |
| 1434 | ssc->invlist = NULL; |
| 1435 | |
| 1436 | if (ANYOF_POSIXL_SSC_TEST_ANY_SET(ssc)) { |
| 1437 | ANYOF_FLAGS(ssc) |= ANYOF_POSIXL; |
| 1438 | } |
| 1439 | |
| 1440 | assert(! (ANYOF_FLAGS(ssc) & ANYOF_LOCALE_FLAGS) || RExC_contains_locale); |
| 1441 | } |
| 1442 | |
| 1443 | #define TRIE_LIST_ITEM(state,idx) (trie->states[state].trans.list)[ idx ] |
| 1444 | #define TRIE_LIST_CUR(state) ( TRIE_LIST_ITEM( state, 0 ).forid ) |
| 1445 | #define TRIE_LIST_LEN(state) ( TRIE_LIST_ITEM( state, 0 ).newstate ) |
| 1446 | #define TRIE_LIST_USED(idx) ( trie->states[state].trans.list \ |
| 1447 | ? (TRIE_LIST_CUR( idx ) - 1) \ |
| 1448 | : 0 ) |
| 1449 | |
| 1450 | |
| 1451 | #ifdef DEBUGGING |
| 1452 | /* |
| 1453 | dump_trie(trie,widecharmap,revcharmap) |
| 1454 | dump_trie_interim_list(trie,widecharmap,revcharmap,next_alloc) |
| 1455 | dump_trie_interim_table(trie,widecharmap,revcharmap,next_alloc) |
| 1456 | |
| 1457 | These routines dump out a trie in a somewhat readable format. |
| 1458 | The _interim_ variants are used for debugging the interim |
| 1459 | tables that are used to generate the final compressed |
| 1460 | representation which is what dump_trie expects. |
| 1461 | |
| 1462 | Part of the reason for their existence is to provide a form |
| 1463 | of documentation as to how the different representations function. |
| 1464 | |
| 1465 | */ |
| 1466 | |
| 1467 | /* |
| 1468 | Dumps the final compressed table form of the trie to Perl_debug_log. |
| 1469 | Used for debugging make_trie(). |
| 1470 | */ |
| 1471 | |
| 1472 | STATIC void |
| 1473 | S_dump_trie(pTHX_ const struct _reg_trie_data *trie, HV *widecharmap, |
| 1474 | AV *revcharmap, U32 depth) |
| 1475 | { |
| 1476 | U32 state; |
| 1477 | SV *sv=sv_newmortal(); |
| 1478 | int colwidth= widecharmap ? 6 : 4; |
| 1479 | U16 word; |
| 1480 | GET_RE_DEBUG_FLAGS_DECL; |
| 1481 | |
| 1482 | PERL_ARGS_ASSERT_DUMP_TRIE; |
| 1483 | |
| 1484 | PerlIO_printf( Perl_debug_log, "%*sChar : %-6s%-6s%-4s ", |
| 1485 | (int)depth * 2 + 2,"", |
| 1486 | "Match","Base","Ofs" ); |
| 1487 | |
| 1488 | for( state = 0 ; state < trie->uniquecharcount ; state++ ) { |
| 1489 | SV ** const tmp = av_fetch( revcharmap, state, 0); |
| 1490 | if ( tmp ) { |
| 1491 | PerlIO_printf( Perl_debug_log, "%*s", |
| 1492 | colwidth, |
| 1493 | pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth, |
| 1494 | PL_colors[0], PL_colors[1], |
| 1495 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) | |
| 1496 | PERL_PV_ESCAPE_FIRSTCHAR |
| 1497 | ) |
| 1498 | ); |
| 1499 | } |
| 1500 | } |
| 1501 | PerlIO_printf( Perl_debug_log, "\n%*sState|-----------------------", |
| 1502 | (int)depth * 2 + 2,""); |
| 1503 | |
| 1504 | for( state = 0 ; state < trie->uniquecharcount ; state++ ) |
| 1505 | PerlIO_printf( Perl_debug_log, "%.*s", colwidth, "--------"); |
| 1506 | PerlIO_printf( Perl_debug_log, "\n"); |
| 1507 | |
| 1508 | for( state = 1 ; state < trie->statecount ; state++ ) { |
| 1509 | const U32 base = trie->states[ state ].trans.base; |
| 1510 | |
| 1511 | PerlIO_printf( Perl_debug_log, "%*s#%4"UVXf"|", |
| 1512 | (int)depth * 2 + 2,"", (UV)state); |
| 1513 | |
| 1514 | if ( trie->states[ state ].wordnum ) { |
| 1515 | PerlIO_printf( Perl_debug_log, " W%4X", |
| 1516 | trie->states[ state ].wordnum ); |
| 1517 | } else { |
| 1518 | PerlIO_printf( Perl_debug_log, "%6s", "" ); |
| 1519 | } |
| 1520 | |
| 1521 | PerlIO_printf( Perl_debug_log, " @%4"UVXf" ", (UV)base ); |
| 1522 | |
| 1523 | if ( base ) { |
| 1524 | U32 ofs = 0; |
| 1525 | |
| 1526 | while( ( base + ofs < trie->uniquecharcount ) || |
| 1527 | ( base + ofs - trie->uniquecharcount < trie->lasttrans |
| 1528 | && trie->trans[ base + ofs - trie->uniquecharcount ].check |
| 1529 | != state)) |
| 1530 | ofs++; |
| 1531 | |
| 1532 | PerlIO_printf( Perl_debug_log, "+%2"UVXf"[ ", (UV)ofs); |
| 1533 | |
| 1534 | for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) { |
| 1535 | if ( ( base + ofs >= trie->uniquecharcount ) |
| 1536 | && ( base + ofs - trie->uniquecharcount |
| 1537 | < trie->lasttrans ) |
| 1538 | && trie->trans[ base + ofs |
| 1539 | - trie->uniquecharcount ].check == state ) |
| 1540 | { |
| 1541 | PerlIO_printf( Perl_debug_log, "%*"UVXf, |
| 1542 | colwidth, |
| 1543 | (UV)trie->trans[ base + ofs |
| 1544 | - trie->uniquecharcount ].next ); |
| 1545 | } else { |
| 1546 | PerlIO_printf( Perl_debug_log, "%*s",colwidth," ." ); |
| 1547 | } |
| 1548 | } |
| 1549 | |
| 1550 | PerlIO_printf( Perl_debug_log, "]"); |
| 1551 | |
| 1552 | } |
| 1553 | PerlIO_printf( Perl_debug_log, "\n" ); |
| 1554 | } |
| 1555 | PerlIO_printf(Perl_debug_log, "%*sword_info N:(prev,len)=", |
| 1556 | (int)depth*2, ""); |
| 1557 | for (word=1; word <= trie->wordcount; word++) { |
| 1558 | PerlIO_printf(Perl_debug_log, " %d:(%d,%d)", |
| 1559 | (int)word, (int)(trie->wordinfo[word].prev), |
| 1560 | (int)(trie->wordinfo[word].len)); |
| 1561 | } |
| 1562 | PerlIO_printf(Perl_debug_log, "\n" ); |
| 1563 | } |
| 1564 | /* |
| 1565 | Dumps a fully constructed but uncompressed trie in list form. |
| 1566 | List tries normally only are used for construction when the number of |
| 1567 | possible chars (trie->uniquecharcount) is very high. |
| 1568 | Used for debugging make_trie(). |
| 1569 | */ |
| 1570 | STATIC void |
| 1571 | S_dump_trie_interim_list(pTHX_ const struct _reg_trie_data *trie, |
| 1572 | HV *widecharmap, AV *revcharmap, U32 next_alloc, |
| 1573 | U32 depth) |
| 1574 | { |
| 1575 | U32 state; |
| 1576 | SV *sv=sv_newmortal(); |
| 1577 | int colwidth= widecharmap ? 6 : 4; |
| 1578 | GET_RE_DEBUG_FLAGS_DECL; |
| 1579 | |
| 1580 | PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_LIST; |
| 1581 | |
| 1582 | /* print out the table precompression. */ |
| 1583 | PerlIO_printf( Perl_debug_log, "%*sState :Word | Transition Data\n%*s%s", |
| 1584 | (int)depth * 2 + 2,"", (int)depth * 2 + 2,"", |
| 1585 | "------:-----+-----------------\n" ); |
| 1586 | |
| 1587 | for( state=1 ; state < next_alloc ; state ++ ) { |
| 1588 | U16 charid; |
| 1589 | |
| 1590 | PerlIO_printf( Perl_debug_log, "%*s %4"UVXf" :", |
| 1591 | (int)depth * 2 + 2,"", (UV)state ); |
| 1592 | if ( ! trie->states[ state ].wordnum ) { |
| 1593 | PerlIO_printf( Perl_debug_log, "%5s| ",""); |
| 1594 | } else { |
| 1595 | PerlIO_printf( Perl_debug_log, "W%4x| ", |
| 1596 | trie->states[ state ].wordnum |
| 1597 | ); |
| 1598 | } |
| 1599 | for( charid = 1 ; charid <= TRIE_LIST_USED( state ) ; charid++ ) { |
| 1600 | SV ** const tmp = av_fetch( revcharmap, |
| 1601 | TRIE_LIST_ITEM(state,charid).forid, 0); |
| 1602 | if ( tmp ) { |
| 1603 | PerlIO_printf( Perl_debug_log, "%*s:%3X=%4"UVXf" | ", |
| 1604 | colwidth, |
| 1605 | pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), |
| 1606 | colwidth, |
| 1607 | PL_colors[0], PL_colors[1], |
| 1608 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) |
| 1609 | | PERL_PV_ESCAPE_FIRSTCHAR |
| 1610 | ) , |
| 1611 | TRIE_LIST_ITEM(state,charid).forid, |
| 1612 | (UV)TRIE_LIST_ITEM(state,charid).newstate |
| 1613 | ); |
| 1614 | if (!(charid % 10)) |
| 1615 | PerlIO_printf(Perl_debug_log, "\n%*s| ", |
| 1616 | (int)((depth * 2) + 14), ""); |
| 1617 | } |
| 1618 | } |
| 1619 | PerlIO_printf( Perl_debug_log, "\n"); |
| 1620 | } |
| 1621 | } |
| 1622 | |
| 1623 | /* |
| 1624 | Dumps a fully constructed but uncompressed trie in table form. |
| 1625 | This is the normal DFA style state transition table, with a few |
| 1626 | twists to facilitate compression later. |
| 1627 | Used for debugging make_trie(). |
| 1628 | */ |
| 1629 | STATIC void |
| 1630 | S_dump_trie_interim_table(pTHX_ const struct _reg_trie_data *trie, |
| 1631 | HV *widecharmap, AV *revcharmap, U32 next_alloc, |
| 1632 | U32 depth) |
| 1633 | { |
| 1634 | U32 state; |
| 1635 | U16 charid; |
| 1636 | SV *sv=sv_newmortal(); |
| 1637 | int colwidth= widecharmap ? 6 : 4; |
| 1638 | GET_RE_DEBUG_FLAGS_DECL; |
| 1639 | |
| 1640 | PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_TABLE; |
| 1641 | |
| 1642 | /* |
| 1643 | print out the table precompression so that we can do a visual check |
| 1644 | that they are identical. |
| 1645 | */ |
| 1646 | |
| 1647 | PerlIO_printf( Perl_debug_log, "%*sChar : ",(int)depth * 2 + 2,"" ); |
| 1648 | |
| 1649 | for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) { |
| 1650 | SV ** const tmp = av_fetch( revcharmap, charid, 0); |
| 1651 | if ( tmp ) { |
| 1652 | PerlIO_printf( Perl_debug_log, "%*s", |
| 1653 | colwidth, |
| 1654 | pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth, |
| 1655 | PL_colors[0], PL_colors[1], |
| 1656 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) | |
| 1657 | PERL_PV_ESCAPE_FIRSTCHAR |
| 1658 | ) |
| 1659 | ); |
| 1660 | } |
| 1661 | } |
| 1662 | |
| 1663 | PerlIO_printf( Perl_debug_log, "\n%*sState+-",(int)depth * 2 + 2,"" ); |
| 1664 | |
| 1665 | for( charid=0 ; charid < trie->uniquecharcount ; charid++ ) { |
| 1666 | PerlIO_printf( Perl_debug_log, "%.*s", colwidth,"--------"); |
| 1667 | } |
| 1668 | |
| 1669 | PerlIO_printf( Perl_debug_log, "\n" ); |
| 1670 | |
| 1671 | for( state=1 ; state < next_alloc ; state += trie->uniquecharcount ) { |
| 1672 | |
| 1673 | PerlIO_printf( Perl_debug_log, "%*s%4"UVXf" : ", |
| 1674 | (int)depth * 2 + 2,"", |
| 1675 | (UV)TRIE_NODENUM( state ) ); |
| 1676 | |
| 1677 | for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) { |
| 1678 | UV v=(UV)SAFE_TRIE_NODENUM( trie->trans[ state + charid ].next ); |
| 1679 | if (v) |
| 1680 | PerlIO_printf( Perl_debug_log, "%*"UVXf, colwidth, v ); |
| 1681 | else |
| 1682 | PerlIO_printf( Perl_debug_log, "%*s", colwidth, "." ); |
| 1683 | } |
| 1684 | if ( ! trie->states[ TRIE_NODENUM( state ) ].wordnum ) { |
| 1685 | PerlIO_printf( Perl_debug_log, " (%4"UVXf")\n", |
| 1686 | (UV)trie->trans[ state ].check ); |
| 1687 | } else { |
| 1688 | PerlIO_printf( Perl_debug_log, " (%4"UVXf") W%4X\n", |
| 1689 | (UV)trie->trans[ state ].check, |
| 1690 | trie->states[ TRIE_NODENUM( state ) ].wordnum ); |
| 1691 | } |
| 1692 | } |
| 1693 | } |
| 1694 | |
| 1695 | #endif |
| 1696 | |
| 1697 | |
| 1698 | /* make_trie(startbranch,first,last,tail,word_count,flags,depth) |
| 1699 | startbranch: the first branch in the whole branch sequence |
| 1700 | first : start branch of sequence of branch-exact nodes. |
| 1701 | May be the same as startbranch |
| 1702 | last : Thing following the last branch. |
| 1703 | May be the same as tail. |
| 1704 | tail : item following the branch sequence |
| 1705 | count : words in the sequence |
| 1706 | flags : currently the OP() type we will be building one of /EXACT(|F|FA|FU|FU_SS)/ |
| 1707 | depth : indent depth |
| 1708 | |
| 1709 | Inplace optimizes a sequence of 2 or more Branch-Exact nodes into a TRIE node. |
| 1710 | |
| 1711 | A trie is an N'ary tree where the branches are determined by digital |
| 1712 | decomposition of the key. IE, at the root node you look up the 1st character and |
| 1713 | follow that branch repeat until you find the end of the branches. Nodes can be |
| 1714 | marked as "accepting" meaning they represent a complete word. Eg: |
| 1715 | |
| 1716 | /he|she|his|hers/ |
| 1717 | |
| 1718 | would convert into the following structure. Numbers represent states, letters |
| 1719 | following numbers represent valid transitions on the letter from that state, if |
| 1720 | the number is in square brackets it represents an accepting state, otherwise it |
| 1721 | will be in parenthesis. |
| 1722 | |
| 1723 | +-h->+-e->[3]-+-r->(8)-+-s->[9] |
| 1724 | | | |
| 1725 | | (2) |
| 1726 | | | |
| 1727 | (1) +-i->(6)-+-s->[7] |
| 1728 | | |
| 1729 | +-s->(3)-+-h->(4)-+-e->[5] |
| 1730 | |
| 1731 | Accept Word Mapping: 3=>1 (he),5=>2 (she), 7=>3 (his), 9=>4 (hers) |
| 1732 | |
| 1733 | This shows that when matching against the string 'hers' we will begin at state 1 |
| 1734 | read 'h' and move to state 2, read 'e' and move to state 3 which is accepting, |
| 1735 | then read 'r' and go to state 8 followed by 's' which takes us to state 9 which |
| 1736 | is also accepting. Thus we know that we can match both 'he' and 'hers' with a |
| 1737 | single traverse. We store a mapping from accepting to state to which word was |
| 1738 | matched, and then when we have multiple possibilities we try to complete the |
| 1739 | rest of the regex in the order in which they occured in the alternation. |
| 1740 | |
| 1741 | The only prior NFA like behaviour that would be changed by the TRIE support is |
| 1742 | the silent ignoring of duplicate alternations which are of the form: |
| 1743 | |
| 1744 | / (DUPE|DUPE) X? (?{ ... }) Y /x |
| 1745 | |
| 1746 | Thus EVAL blocks following a trie may be called a different number of times with |
| 1747 | and without the optimisation. With the optimisations dupes will be silently |
| 1748 | ignored. This inconsistent behaviour of EVAL type nodes is well established as |
| 1749 | the following demonstrates: |
| 1750 | |
| 1751 | 'words'=~/(word|word|word)(?{ print $1 })[xyz]/ |
| 1752 | |
| 1753 | which prints out 'word' three times, but |
| 1754 | |
| 1755 | 'words'=~/(word|word|word)(?{ print $1 })S/ |
| 1756 | |
| 1757 | which doesnt print it out at all. This is due to other optimisations kicking in. |
| 1758 | |
| 1759 | Example of what happens on a structural level: |
| 1760 | |
| 1761 | The regexp /(ac|ad|ab)+/ will produce the following debug output: |
| 1762 | |
| 1763 | 1: CURLYM[1] {1,32767}(18) |
| 1764 | 5: BRANCH(8) |
| 1765 | 6: EXACT <ac>(16) |
| 1766 | 8: BRANCH(11) |
| 1767 | 9: EXACT <ad>(16) |
| 1768 | 11: BRANCH(14) |
| 1769 | 12: EXACT <ab>(16) |
| 1770 | 16: SUCCEED(0) |
| 1771 | 17: NOTHING(18) |
| 1772 | 18: END(0) |
| 1773 | |
| 1774 | This would be optimizable with startbranch=5, first=5, last=16, tail=16 |
| 1775 | and should turn into: |
| 1776 | |
| 1777 | 1: CURLYM[1] {1,32767}(18) |
| 1778 | 5: TRIE(16) |
| 1779 | [Words:3 Chars Stored:6 Unique Chars:4 States:5 NCP:1] |
| 1780 | <ac> |
| 1781 | <ad> |
| 1782 | <ab> |
| 1783 | 16: SUCCEED(0) |
| 1784 | 17: NOTHING(18) |
| 1785 | 18: END(0) |
| 1786 | |
| 1787 | Cases where tail != last would be like /(?foo|bar)baz/: |
| 1788 | |
| 1789 | 1: BRANCH(4) |
| 1790 | 2: EXACT <foo>(8) |
| 1791 | 4: BRANCH(7) |
| 1792 | 5: EXACT <bar>(8) |
| 1793 | 7: TAIL(8) |
| 1794 | 8: EXACT <baz>(10) |
| 1795 | 10: END(0) |
| 1796 | |
| 1797 | which would be optimizable with startbranch=1, first=1, last=7, tail=8 |
| 1798 | and would end up looking like: |
| 1799 | |
| 1800 | 1: TRIE(8) |
| 1801 | [Words:2 Chars Stored:6 Unique Chars:5 States:7 NCP:1] |
| 1802 | <foo> |
| 1803 | <bar> |
| 1804 | 7: TAIL(8) |
| 1805 | 8: EXACT <baz>(10) |
| 1806 | 10: END(0) |
| 1807 | |
| 1808 | d = uvchr_to_utf8_flags(d, uv, 0); |
| 1809 | |
| 1810 | is the recommended Unicode-aware way of saying |
| 1811 | |
| 1812 | *(d++) = uv; |
| 1813 | */ |
| 1814 | |
| 1815 | #define TRIE_STORE_REVCHAR(val) \ |
| 1816 | STMT_START { \ |
| 1817 | if (UTF) { \ |
| 1818 | SV *zlopp = newSV(7); /* XXX: optimize me */ \ |
| 1819 | unsigned char *flrbbbbb = (unsigned char *) SvPVX(zlopp); \ |
| 1820 | unsigned const char *const kapow = uvchr_to_utf8(flrbbbbb, val); \ |
| 1821 | SvCUR_set(zlopp, kapow - flrbbbbb); \ |
| 1822 | SvPOK_on(zlopp); \ |
| 1823 | SvUTF8_on(zlopp); \ |
| 1824 | av_push(revcharmap, zlopp); \ |
| 1825 | } else { \ |
| 1826 | char ooooff = (char)val; \ |
| 1827 | av_push(revcharmap, newSVpvn(&ooooff, 1)); \ |
| 1828 | } \ |
| 1829 | } STMT_END |
| 1830 | |
| 1831 | /* This gets the next character from the input, folding it if not already |
| 1832 | * folded. */ |
| 1833 | #define TRIE_READ_CHAR STMT_START { \ |
| 1834 | wordlen++; \ |
| 1835 | if ( UTF ) { \ |
| 1836 | /* if it is UTF then it is either already folded, or does not need \ |
| 1837 | * folding */ \ |
| 1838 | uvc = valid_utf8_to_uvchr( (const U8*) uc, &len); \ |
| 1839 | } \ |
| 1840 | else if (folder == PL_fold_latin1) { \ |
| 1841 | /* This folder implies Unicode rules, which in the range expressible \ |
| 1842 | * by not UTF is the lower case, with the two exceptions, one of \ |
| 1843 | * which should have been taken care of before calling this */ \ |
| 1844 | assert(*uc != LATIN_SMALL_LETTER_SHARP_S); \ |
| 1845 | uvc = toLOWER_L1(*uc); \ |
| 1846 | if (UNLIKELY(uvc == MICRO_SIGN)) uvc = GREEK_SMALL_LETTER_MU; \ |
| 1847 | len = 1; \ |
| 1848 | } else { \ |
| 1849 | /* raw data, will be folded later if needed */ \ |
| 1850 | uvc = (U32)*uc; \ |
| 1851 | len = 1; \ |
| 1852 | } \ |
| 1853 | } STMT_END |
| 1854 | |
| 1855 | |
| 1856 | |
| 1857 | #define TRIE_LIST_PUSH(state,fid,ns) STMT_START { \ |
| 1858 | if ( TRIE_LIST_CUR( state ) >=TRIE_LIST_LEN( state ) ) { \ |
| 1859 | U32 ging = TRIE_LIST_LEN( state ) *= 2; \ |
| 1860 | Renew( trie->states[ state ].trans.list, ging, reg_trie_trans_le ); \ |
| 1861 | } \ |
| 1862 | TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).forid = fid; \ |
| 1863 | TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).newstate = ns; \ |
| 1864 | TRIE_LIST_CUR( state )++; \ |
| 1865 | } STMT_END |
| 1866 | |
| 1867 | #define TRIE_LIST_NEW(state) STMT_START { \ |
| 1868 | Newxz( trie->states[ state ].trans.list, \ |
| 1869 | 4, reg_trie_trans_le ); \ |
| 1870 | TRIE_LIST_CUR( state ) = 1; \ |
| 1871 | TRIE_LIST_LEN( state ) = 4; \ |
| 1872 | } STMT_END |
| 1873 | |
| 1874 | #define TRIE_HANDLE_WORD(state) STMT_START { \ |
| 1875 | U16 dupe= trie->states[ state ].wordnum; \ |
| 1876 | regnode * const noper_next = regnext( noper ); \ |
| 1877 | \ |
| 1878 | DEBUG_r({ \ |
| 1879 | /* store the word for dumping */ \ |
| 1880 | SV* tmp; \ |
| 1881 | if (OP(noper) != NOTHING) \ |
| 1882 | tmp = newSVpvn_utf8(STRING(noper), STR_LEN(noper), UTF); \ |
| 1883 | else \ |
| 1884 | tmp = newSVpvn_utf8( "", 0, UTF ); \ |
| 1885 | av_push( trie_words, tmp ); \ |
| 1886 | }); \ |
| 1887 | \ |
| 1888 | curword++; \ |
| 1889 | trie->wordinfo[curword].prev = 0; \ |
| 1890 | trie->wordinfo[curword].len = wordlen; \ |
| 1891 | trie->wordinfo[curword].accept = state; \ |
| 1892 | \ |
| 1893 | if ( noper_next < tail ) { \ |
| 1894 | if (!trie->jump) \ |
| 1895 | trie->jump = (U16 *) PerlMemShared_calloc( word_count + 1, \ |
| 1896 | sizeof(U16) ); \ |
| 1897 | trie->jump[curword] = (U16)(noper_next - convert); \ |
| 1898 | if (!jumper) \ |
| 1899 | jumper = noper_next; \ |
| 1900 | if (!nextbranch) \ |
| 1901 | nextbranch= regnext(cur); \ |
| 1902 | } \ |
| 1903 | \ |
| 1904 | if ( dupe ) { \ |
| 1905 | /* It's a dupe. Pre-insert into the wordinfo[].prev */\ |
| 1906 | /* chain, so that when the bits of chain are later */\ |
| 1907 | /* linked together, the dups appear in the chain */\ |
| 1908 | trie->wordinfo[curword].prev = trie->wordinfo[dupe].prev; \ |
| 1909 | trie->wordinfo[dupe].prev = curword; \ |
| 1910 | } else { \ |
| 1911 | /* we haven't inserted this word yet. */ \ |
| 1912 | trie->states[ state ].wordnum = curword; \ |
| 1913 | } \ |
| 1914 | } STMT_END |
| 1915 | |
| 1916 | |
| 1917 | #define TRIE_TRANS_STATE(state,base,ucharcount,charid,special) \ |
| 1918 | ( ( base + charid >= ucharcount \ |
| 1919 | && base + charid < ubound \ |
| 1920 | && state == trie->trans[ base - ucharcount + charid ].check \ |
| 1921 | && trie->trans[ base - ucharcount + charid ].next ) \ |
| 1922 | ? trie->trans[ base - ucharcount + charid ].next \ |
| 1923 | : ( state==1 ? special : 0 ) \ |
| 1924 | ) |
| 1925 | |
| 1926 | #define MADE_TRIE 1 |
| 1927 | #define MADE_JUMP_TRIE 2 |
| 1928 | #define MADE_EXACT_TRIE 4 |
| 1929 | |
| 1930 | STATIC I32 |
| 1931 | S_make_trie(pTHX_ RExC_state_t *pRExC_state, regnode *startbranch, |
| 1932 | regnode *first, regnode *last, regnode *tail, |
| 1933 | U32 word_count, U32 flags, U32 depth) |
| 1934 | { |
| 1935 | /* first pass, loop through and scan words */ |
| 1936 | reg_trie_data *trie; |
| 1937 | HV *widecharmap = NULL; |
| 1938 | AV *revcharmap = newAV(); |
| 1939 | regnode *cur; |
| 1940 | STRLEN len = 0; |
| 1941 | UV uvc = 0; |
| 1942 | U16 curword = 0; |
| 1943 | U32 next_alloc = 0; |
| 1944 | regnode *jumper = NULL; |
| 1945 | regnode *nextbranch = NULL; |
| 1946 | regnode *convert = NULL; |
| 1947 | U32 *prev_states; /* temp array mapping each state to previous one */ |
| 1948 | /* we just use folder as a flag in utf8 */ |
| 1949 | const U8 * folder = NULL; |
| 1950 | |
| 1951 | #ifdef DEBUGGING |
| 1952 | const U32 data_slot = add_data( pRExC_state, STR_WITH_LEN("tuuu")); |
| 1953 | AV *trie_words = NULL; |
| 1954 | /* along with revcharmap, this only used during construction but both are |
| 1955 | * useful during debugging so we store them in the struct when debugging. |
| 1956 | */ |
| 1957 | #else |
| 1958 | const U32 data_slot = add_data( pRExC_state, STR_WITH_LEN("tu")); |
| 1959 | STRLEN trie_charcount=0; |
| 1960 | #endif |
| 1961 | SV *re_trie_maxbuff; |
| 1962 | GET_RE_DEBUG_FLAGS_DECL; |
| 1963 | |
| 1964 | PERL_ARGS_ASSERT_MAKE_TRIE; |
| 1965 | #ifndef DEBUGGING |
| 1966 | PERL_UNUSED_ARG(depth); |
| 1967 | #endif |
| 1968 | |
| 1969 | switch (flags) { |
| 1970 | case EXACT: break; |
| 1971 | case EXACTFA: |
| 1972 | case EXACTFU_SS: |
| 1973 | case EXACTFU: folder = PL_fold_latin1; break; |
| 1974 | case EXACTF: folder = PL_fold; break; |
| 1975 | default: Perl_croak( aTHX_ "panic! In trie construction, unknown node type %u %s", (unsigned) flags, PL_reg_name[flags] ); |
| 1976 | } |
| 1977 | |
| 1978 | trie = (reg_trie_data *) PerlMemShared_calloc( 1, sizeof(reg_trie_data) ); |
| 1979 | trie->refcount = 1; |
| 1980 | trie->startstate = 1; |
| 1981 | trie->wordcount = word_count; |
| 1982 | RExC_rxi->data->data[ data_slot ] = (void*)trie; |
| 1983 | trie->charmap = (U16 *) PerlMemShared_calloc( 256, sizeof(U16) ); |
| 1984 | if (flags == EXACT) |
| 1985 | trie->bitmap = (char *) PerlMemShared_calloc( ANYOF_BITMAP_SIZE, 1 ); |
| 1986 | trie->wordinfo = (reg_trie_wordinfo *) PerlMemShared_calloc( |
| 1987 | trie->wordcount+1, sizeof(reg_trie_wordinfo)); |
| 1988 | |
| 1989 | DEBUG_r({ |
| 1990 | trie_words = newAV(); |
| 1991 | }); |
| 1992 | |
| 1993 | re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1); |
| 1994 | assert(re_trie_maxbuff); |
| 1995 | if (!SvIOK(re_trie_maxbuff)) { |
| 1996 | sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT); |
| 1997 | } |
| 1998 | DEBUG_TRIE_COMPILE_r({ |
| 1999 | PerlIO_printf( Perl_debug_log, |
| 2000 | "%*smake_trie start==%d, first==%d, last==%d, tail==%d depth=%d\n", |
| 2001 | (int)depth * 2 + 2, "", |
| 2002 | REG_NODE_NUM(startbranch),REG_NODE_NUM(first), |
| 2003 | REG_NODE_NUM(last), REG_NODE_NUM(tail), (int)depth); |
| 2004 | }); |
| 2005 | |
| 2006 | /* Find the node we are going to overwrite */ |
| 2007 | if ( first == startbranch && OP( last ) != BRANCH ) { |
| 2008 | /* whole branch chain */ |
| 2009 | convert = first; |
| 2010 | } else { |
| 2011 | /* branch sub-chain */ |
| 2012 | convert = NEXTOPER( first ); |
| 2013 | } |
| 2014 | |
| 2015 | /* -- First loop and Setup -- |
| 2016 | |
| 2017 | We first traverse the branches and scan each word to determine if it |
| 2018 | contains widechars, and how many unique chars there are, this is |
| 2019 | important as we have to build a table with at least as many columns as we |
| 2020 | have unique chars. |
| 2021 | |
| 2022 | We use an array of integers to represent the character codes 0..255 |
| 2023 | (trie->charmap) and we use a an HV* to store Unicode characters. We use |
| 2024 | the native representation of the character value as the key and IV's for |
| 2025 | the coded index. |
| 2026 | |
| 2027 | *TODO* If we keep track of how many times each character is used we can |
| 2028 | remap the columns so that the table compression later on is more |
| 2029 | efficient in terms of memory by ensuring the most common value is in the |
| 2030 | middle and the least common are on the outside. IMO this would be better |
| 2031 | than a most to least common mapping as theres a decent chance the most |
| 2032 | common letter will share a node with the least common, meaning the node |
| 2033 | will not be compressible. With a middle is most common approach the worst |
| 2034 | case is when we have the least common nodes twice. |
| 2035 | |
| 2036 | */ |
| 2037 | |
| 2038 | for ( cur = first ; cur < last ; cur = regnext( cur ) ) { |
| 2039 | regnode *noper = NEXTOPER( cur ); |
| 2040 | const U8 *uc = (U8*)STRING( noper ); |
| 2041 | const U8 *e = uc + STR_LEN( noper ); |
| 2042 | int foldlen = 0; |
| 2043 | U32 wordlen = 0; /* required init */ |
| 2044 | STRLEN minchars = 0; |
| 2045 | STRLEN maxchars = 0; |
| 2046 | bool set_bit = trie->bitmap ? 1 : 0; /*store the first char in the |
| 2047 | bitmap?*/ |
| 2048 | |
| 2049 | if (OP(noper) == NOTHING) { |
| 2050 | regnode *noper_next= regnext(noper); |
| 2051 | if (noper_next != tail && OP(noper_next) == flags) { |
| 2052 | noper = noper_next; |
| 2053 | uc= (U8*)STRING(noper); |
| 2054 | e= uc + STR_LEN(noper); |
| 2055 | trie->minlen= STR_LEN(noper); |
| 2056 | } else { |
| 2057 | trie->minlen= 0; |
| 2058 | continue; |
| 2059 | } |
| 2060 | } |
| 2061 | |
| 2062 | if ( set_bit ) { /* bitmap only alloced when !(UTF&&Folding) */ |
| 2063 | TRIE_BITMAP_SET(trie,*uc); /* store the raw first byte |
| 2064 | regardless of encoding */ |
| 2065 | if (OP( noper ) == EXACTFU_SS) { |
| 2066 | /* false positives are ok, so just set this */ |
| 2067 | TRIE_BITMAP_SET(trie, LATIN_SMALL_LETTER_SHARP_S); |
| 2068 | } |
| 2069 | } |
| 2070 | for ( ; uc < e ; uc += len ) { /* Look at each char in the current |
| 2071 | branch */ |
| 2072 | TRIE_CHARCOUNT(trie)++; |
| 2073 | TRIE_READ_CHAR; |
| 2074 | |
| 2075 | /* TRIE_READ_CHAR returns the current character, or its fold if /i |
| 2076 | * is in effect. Under /i, this character can match itself, or |
| 2077 | * anything that folds to it. If not under /i, it can match just |
| 2078 | * itself. Most folds are 1-1, for example k, K, and KELVIN SIGN |
| 2079 | * all fold to k, and all are single characters. But some folds |
| 2080 | * expand to more than one character, so for example LATIN SMALL |
| 2081 | * LIGATURE FFI folds to the three character sequence 'ffi'. If |
| 2082 | * the string beginning at 'uc' is 'ffi', it could be matched by |
| 2083 | * three characters, or just by the one ligature character. (It |
| 2084 | * could also be matched by two characters: LATIN SMALL LIGATURE FF |
| 2085 | * followed by 'i', or by 'f' followed by LATIN SMALL LIGATURE FI). |
| 2086 | * (Of course 'I' and/or 'F' instead of 'i' and 'f' can also |
| 2087 | * match.) The trie needs to know the minimum and maximum number |
| 2088 | * of characters that could match so that it can use size alone to |
| 2089 | * quickly reject many match attempts. The max is simple: it is |
| 2090 | * the number of folded characters in this branch (since a fold is |
| 2091 | * never shorter than what folds to it. */ |
| 2092 | |
| 2093 | maxchars++; |
| 2094 | |
| 2095 | /* And the min is equal to the max if not under /i (indicated by |
| 2096 | * 'folder' being NULL), or there are no multi-character folds. If |
| 2097 | * there is a multi-character fold, the min is incremented just |
| 2098 | * once, for the character that folds to the sequence. Each |
| 2099 | * character in the sequence needs to be added to the list below of |
| 2100 | * characters in the trie, but we count only the first towards the |
| 2101 | * min number of characters needed. This is done through the |
| 2102 | * variable 'foldlen', which is returned by the macros that look |
| 2103 | * for these sequences as the number of bytes the sequence |
| 2104 | * occupies. Each time through the loop, we decrement 'foldlen' by |
| 2105 | * how many bytes the current char occupies. Only when it reaches |
| 2106 | * 0 do we increment 'minchars' or look for another multi-character |
| 2107 | * sequence. */ |
| 2108 | if (folder == NULL) { |
| 2109 | minchars++; |
| 2110 | } |
| 2111 | else if (foldlen > 0) { |
| 2112 | foldlen -= (UTF) ? UTF8SKIP(uc) : 1; |
| 2113 | } |
| 2114 | else { |
| 2115 | minchars++; |
| 2116 | |
| 2117 | /* See if *uc is the beginning of a multi-character fold. If |
| 2118 | * so, we decrement the length remaining to look at, to account |
| 2119 | * for the current character this iteration. (We can use 'uc' |
| 2120 | * instead of the fold returned by TRIE_READ_CHAR because for |
| 2121 | * non-UTF, the latin1_safe macro is smart enough to account |
| 2122 | * for all the unfolded characters, and because for UTF, the |
| 2123 | * string will already have been folded earlier in the |
| 2124 | * compilation process */ |
| 2125 | if (UTF) { |
| 2126 | if ((foldlen = is_MULTI_CHAR_FOLD_utf8_safe(uc, e))) { |
| 2127 | foldlen -= UTF8SKIP(uc); |
| 2128 | } |
| 2129 | } |
| 2130 | else if ((foldlen = is_MULTI_CHAR_FOLD_latin1_safe(uc, e))) { |
| 2131 | foldlen--; |
| 2132 | } |
| 2133 | } |
| 2134 | |
| 2135 | /* The current character (and any potential folds) should be added |
| 2136 | * to the possible matching characters for this position in this |
| 2137 | * branch */ |
| 2138 | if ( uvc < 256 ) { |
| 2139 | if ( folder ) { |
| 2140 | U8 folded= folder[ (U8) uvc ]; |
| 2141 | if ( !trie->charmap[ folded ] ) { |
| 2142 | trie->charmap[ folded ]=( ++trie->uniquecharcount ); |
| 2143 | TRIE_STORE_REVCHAR( folded ); |
| 2144 | } |
| 2145 | } |
| 2146 | if ( !trie->charmap[ uvc ] ) { |
| 2147 | trie->charmap[ uvc ]=( ++trie->uniquecharcount ); |
| 2148 | TRIE_STORE_REVCHAR( uvc ); |
| 2149 | } |
| 2150 | if ( set_bit ) { |
| 2151 | /* store the codepoint in the bitmap, and its folded |
| 2152 | * equivalent. */ |
| 2153 | TRIE_BITMAP_SET(trie, uvc); |
| 2154 | |
| 2155 | /* store the folded codepoint */ |
| 2156 | if ( folder ) TRIE_BITMAP_SET(trie, folder[(U8) uvc ]); |
| 2157 | |
| 2158 | if ( !UTF ) { |
| 2159 | /* store first byte of utf8 representation of |
| 2160 | variant codepoints */ |
| 2161 | if (! UVCHR_IS_INVARIANT(uvc)) { |
| 2162 | TRIE_BITMAP_SET(trie, UTF8_TWO_BYTE_HI(uvc)); |
| 2163 | } |
| 2164 | } |
| 2165 | set_bit = 0; /* We've done our bit :-) */ |
| 2166 | } |
| 2167 | } else { |
| 2168 | |
| 2169 | /* XXX We could come up with the list of code points that fold |
| 2170 | * to this using PL_utf8_foldclosures, except not for |
| 2171 | * multi-char folds, as there may be multiple combinations |
| 2172 | * there that could work, which needs to wait until runtime to |
| 2173 | * resolve (The comment about LIGATURE FFI above is such an |
| 2174 | * example */ |
| 2175 | |
| 2176 | SV** svpp; |
| 2177 | if ( !widecharmap ) |
| 2178 | widecharmap = newHV(); |
| 2179 | |
| 2180 | svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 1 ); |
| 2181 | |
| 2182 | if ( !svpp ) |
| 2183 | Perl_croak( aTHX_ "error creating/fetching widecharmap entry for 0x%"UVXf, uvc ); |
| 2184 | |
| 2185 | if ( !SvTRUE( *svpp ) ) { |
| 2186 | sv_setiv( *svpp, ++trie->uniquecharcount ); |
| 2187 | TRIE_STORE_REVCHAR(uvc); |
| 2188 | } |
| 2189 | } |
| 2190 | } /* end loop through characters in this branch of the trie */ |
| 2191 | |
| 2192 | /* We take the min and max for this branch and combine to find the min |
| 2193 | * and max for all branches processed so far */ |
| 2194 | if( cur == first ) { |
| 2195 | trie->minlen = minchars; |
| 2196 | trie->maxlen = maxchars; |
| 2197 | } else if (minchars < trie->minlen) { |
| 2198 | trie->minlen = minchars; |
| 2199 | } else if (maxchars > trie->maxlen) { |
| 2200 | trie->maxlen = maxchars; |
| 2201 | } |
| 2202 | } /* end first pass */ |
| 2203 | DEBUG_TRIE_COMPILE_r( |
| 2204 | PerlIO_printf( Perl_debug_log, |
| 2205 | "%*sTRIE(%s): W:%d C:%d Uq:%d Min:%d Max:%d\n", |
| 2206 | (int)depth * 2 + 2,"", |
| 2207 | ( widecharmap ? "UTF8" : "NATIVE" ), (int)word_count, |
| 2208 | (int)TRIE_CHARCOUNT(trie), trie->uniquecharcount, |
| 2209 | (int)trie->minlen, (int)trie->maxlen ) |
| 2210 | ); |
| 2211 | |
| 2212 | /* |
| 2213 | We now know what we are dealing with in terms of unique chars and |
| 2214 | string sizes so we can calculate how much memory a naive |
| 2215 | representation using a flat table will take. If it's over a reasonable |
| 2216 | limit (as specified by ${^RE_TRIE_MAXBUF}) we use a more memory |
| 2217 | conservative but potentially much slower representation using an array |
| 2218 | of lists. |
| 2219 | |
| 2220 | At the end we convert both representations into the same compressed |
| 2221 | form that will be used in regexec.c for matching with. The latter |
| 2222 | is a form that cannot be used to construct with but has memory |
| 2223 | properties similar to the list form and access properties similar |
| 2224 | to the table form making it both suitable for fast searches and |
| 2225 | small enough that its feasable to store for the duration of a program. |
| 2226 | |
| 2227 | See the comment in the code where the compressed table is produced |
| 2228 | inplace from the flat tabe representation for an explanation of how |
| 2229 | the compression works. |
| 2230 | |
| 2231 | */ |
| 2232 | |
| 2233 | |
| 2234 | Newx(prev_states, TRIE_CHARCOUNT(trie) + 2, U32); |
| 2235 | prev_states[1] = 0; |
| 2236 | |
| 2237 | if ( (IV)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1) |
| 2238 | > SvIV(re_trie_maxbuff) ) |
| 2239 | { |
| 2240 | /* |
| 2241 | Second Pass -- Array Of Lists Representation |
| 2242 | |
| 2243 | Each state will be represented by a list of charid:state records |
| 2244 | (reg_trie_trans_le) the first such element holds the CUR and LEN |
| 2245 | points of the allocated array. (See defines above). |
| 2246 | |
| 2247 | We build the initial structure using the lists, and then convert |
| 2248 | it into the compressed table form which allows faster lookups |
| 2249 | (but cant be modified once converted). |
| 2250 | */ |
| 2251 | |
| 2252 | STRLEN transcount = 1; |
| 2253 | |
| 2254 | DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log, |
| 2255 | "%*sCompiling trie using list compiler\n", |
| 2256 | (int)depth * 2 + 2, "")); |
| 2257 | |
| 2258 | trie->states = (reg_trie_state *) |
| 2259 | PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2, |
| 2260 | sizeof(reg_trie_state) ); |
| 2261 | TRIE_LIST_NEW(1); |
| 2262 | next_alloc = 2; |
| 2263 | |
| 2264 | for ( cur = first ; cur < last ; cur = regnext( cur ) ) { |
| 2265 | |
| 2266 | regnode *noper = NEXTOPER( cur ); |
| 2267 | U8 *uc = (U8*)STRING( noper ); |
| 2268 | const U8 *e = uc + STR_LEN( noper ); |
| 2269 | U32 state = 1; /* required init */ |
| 2270 | U16 charid = 0; /* sanity init */ |
| 2271 | U32 wordlen = 0; /* required init */ |
| 2272 | |
| 2273 | if (OP(noper) == NOTHING) { |
| 2274 | regnode *noper_next= regnext(noper); |
| 2275 | if (noper_next != tail && OP(noper_next) == flags) { |
| 2276 | noper = noper_next; |
| 2277 | uc= (U8*)STRING(noper); |
| 2278 | e= uc + STR_LEN(noper); |
| 2279 | } |
| 2280 | } |
| 2281 | |
| 2282 | if (OP(noper) != NOTHING) { |
| 2283 | for ( ; uc < e ; uc += len ) { |
| 2284 | |
| 2285 | TRIE_READ_CHAR; |
| 2286 | |
| 2287 | if ( uvc < 256 ) { |
| 2288 | charid = trie->charmap[ uvc ]; |
| 2289 | } else { |
| 2290 | SV** const svpp = hv_fetch( widecharmap, |
| 2291 | (char*)&uvc, |
| 2292 | sizeof( UV ), |
| 2293 | 0); |
| 2294 | if ( !svpp ) { |
| 2295 | charid = 0; |
| 2296 | } else { |
| 2297 | charid=(U16)SvIV( *svpp ); |
| 2298 | } |
| 2299 | } |
| 2300 | /* charid is now 0 if we dont know the char read, or |
| 2301 | * nonzero if we do */ |
| 2302 | if ( charid ) { |
| 2303 | |
| 2304 | U16 check; |
| 2305 | U32 newstate = 0; |
| 2306 | |
| 2307 | charid--; |
| 2308 | if ( !trie->states[ state ].trans.list ) { |
| 2309 | TRIE_LIST_NEW( state ); |
| 2310 | } |
| 2311 | for ( check = 1; |
| 2312 | check <= TRIE_LIST_USED( state ); |
| 2313 | check++ ) |
| 2314 | { |
| 2315 | if ( TRIE_LIST_ITEM( state, check ).forid |
| 2316 | == charid ) |
| 2317 | { |
| 2318 | newstate = TRIE_LIST_ITEM( state, check ).newstate; |
| 2319 | break; |
| 2320 | } |
| 2321 | } |
| 2322 | if ( ! newstate ) { |
| 2323 | newstate = next_alloc++; |
| 2324 | prev_states[newstate] = state; |
| 2325 | TRIE_LIST_PUSH( state, charid, newstate ); |
| 2326 | transcount++; |
| 2327 | } |
| 2328 | state = newstate; |
| 2329 | } else { |
| 2330 | Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc ); |
| 2331 | } |
| 2332 | } |
| 2333 | } |
| 2334 | TRIE_HANDLE_WORD(state); |
| 2335 | |
| 2336 | } /* end second pass */ |
| 2337 | |
| 2338 | /* next alloc is the NEXT state to be allocated */ |
| 2339 | trie->statecount = next_alloc; |
| 2340 | trie->states = (reg_trie_state *) |
| 2341 | PerlMemShared_realloc( trie->states, |
| 2342 | next_alloc |
| 2343 | * sizeof(reg_trie_state) ); |
| 2344 | |
| 2345 | /* and now dump it out before we compress it */ |
| 2346 | DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_list(trie, widecharmap, |
| 2347 | revcharmap, next_alloc, |
| 2348 | depth+1) |
| 2349 | ); |
| 2350 | |
| 2351 | trie->trans = (reg_trie_trans *) |
| 2352 | PerlMemShared_calloc( transcount, sizeof(reg_trie_trans) ); |
| 2353 | { |
| 2354 | U32 state; |
| 2355 | U32 tp = 0; |
| 2356 | U32 zp = 0; |
| 2357 | |
| 2358 | |
| 2359 | for( state=1 ; state < next_alloc ; state ++ ) { |
| 2360 | U32 base=0; |
| 2361 | |
| 2362 | /* |
| 2363 | DEBUG_TRIE_COMPILE_MORE_r( |
| 2364 | PerlIO_printf( Perl_debug_log, "tp: %d zp: %d ",tp,zp) |
| 2365 | ); |
| 2366 | */ |
| 2367 | |
| 2368 | if (trie->states[state].trans.list) { |
| 2369 | U16 minid=TRIE_LIST_ITEM( state, 1).forid; |
| 2370 | U16 maxid=minid; |
| 2371 | U16 idx; |
| 2372 | |
| 2373 | for( idx = 2 ; idx <= TRIE_LIST_USED( state ) ; idx++ ) { |
| 2374 | const U16 forid = TRIE_LIST_ITEM( state, idx).forid; |
| 2375 | if ( forid < minid ) { |
| 2376 | minid=forid; |
| 2377 | } else if ( forid > maxid ) { |
| 2378 | maxid=forid; |
| 2379 | } |
| 2380 | } |
| 2381 | if ( transcount < tp + maxid - minid + 1) { |
| 2382 | transcount *= 2; |
| 2383 | trie->trans = (reg_trie_trans *) |
| 2384 | PerlMemShared_realloc( trie->trans, |
| 2385 | transcount |
| 2386 | * sizeof(reg_trie_trans) ); |
| 2387 | Zero( trie->trans + (transcount / 2), |
| 2388 | transcount / 2, |
| 2389 | reg_trie_trans ); |
| 2390 | } |
| 2391 | base = trie->uniquecharcount + tp - minid; |
| 2392 | if ( maxid == minid ) { |
| 2393 | U32 set = 0; |
| 2394 | for ( ; zp < tp ; zp++ ) { |
| 2395 | if ( ! trie->trans[ zp ].next ) { |
| 2396 | base = trie->uniquecharcount + zp - minid; |
| 2397 | trie->trans[ zp ].next = TRIE_LIST_ITEM( state, |
| 2398 | 1).newstate; |
| 2399 | trie->trans[ zp ].check = state; |
| 2400 | set = 1; |
| 2401 | break; |
| 2402 | } |
| 2403 | } |
| 2404 | if ( !set ) { |
| 2405 | trie->trans[ tp ].next = TRIE_LIST_ITEM( state, |
| 2406 | 1).newstate; |
| 2407 | trie->trans[ tp ].check = state; |
| 2408 | tp++; |
| 2409 | zp = tp; |
| 2410 | } |
| 2411 | } else { |
| 2412 | for ( idx=1; idx <= TRIE_LIST_USED( state ) ; idx++ ) { |
| 2413 | const U32 tid = base |
| 2414 | - trie->uniquecharcount |
| 2415 | + TRIE_LIST_ITEM( state, idx ).forid; |
| 2416 | trie->trans[ tid ].next = TRIE_LIST_ITEM( state, |
| 2417 | idx ).newstate; |
| 2418 | trie->trans[ tid ].check = state; |
| 2419 | } |
| 2420 | tp += ( maxid - minid + 1 ); |
| 2421 | } |
| 2422 | Safefree(trie->states[ state ].trans.list); |
| 2423 | } |
| 2424 | /* |
| 2425 | DEBUG_TRIE_COMPILE_MORE_r( |
| 2426 | PerlIO_printf( Perl_debug_log, " base: %d\n",base); |
| 2427 | ); |
| 2428 | */ |
| 2429 | trie->states[ state ].trans.base=base; |
| 2430 | } |
| 2431 | trie->lasttrans = tp + 1; |
| 2432 | } |
| 2433 | } else { |
| 2434 | /* |
| 2435 | Second Pass -- Flat Table Representation. |
| 2436 | |
| 2437 | we dont use the 0 slot of either trans[] or states[] so we add 1 to |
| 2438 | each. We know that we will need Charcount+1 trans at most to store |
| 2439 | the data (one row per char at worst case) So we preallocate both |
| 2440 | structures assuming worst case. |
| 2441 | |
| 2442 | We then construct the trie using only the .next slots of the entry |
| 2443 | structs. |
| 2444 | |
| 2445 | We use the .check field of the first entry of the node temporarily |
| 2446 | to make compression both faster and easier by keeping track of how |
| 2447 | many non zero fields are in the node. |
| 2448 | |
| 2449 | Since trans are numbered from 1 any 0 pointer in the table is a FAIL |
| 2450 | transition. |
| 2451 | |
| 2452 | There are two terms at use here: state as a TRIE_NODEIDX() which is |
| 2453 | a number representing the first entry of the node, and state as a |
| 2454 | TRIE_NODENUM() which is the trans number. state 1 is TRIE_NODEIDX(1) |
| 2455 | and TRIE_NODENUM(1), state 2 is TRIE_NODEIDX(2) and TRIE_NODENUM(3) |
| 2456 | if there are 2 entrys per node. eg: |
| 2457 | |
| 2458 | A B A B |
| 2459 | 1. 2 4 1. 3 7 |
| 2460 | 2. 0 3 3. 0 5 |
| 2461 | 3. 0 0 5. 0 0 |
| 2462 | 4. 0 0 7. 0 0 |
| 2463 | |
| 2464 | The table is internally in the right hand, idx form. However as we |
| 2465 | also have to deal with the states array which is indexed by nodenum |
| 2466 | we have to use TRIE_NODENUM() to convert. |
| 2467 | |
| 2468 | */ |
| 2469 | DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log, |
| 2470 | "%*sCompiling trie using table compiler\n", |
| 2471 | (int)depth * 2 + 2, "")); |
| 2472 | |
| 2473 | trie->trans = (reg_trie_trans *) |
| 2474 | PerlMemShared_calloc( ( TRIE_CHARCOUNT(trie) + 1 ) |
| 2475 | * trie->uniquecharcount + 1, |
| 2476 | sizeof(reg_trie_trans) ); |
| 2477 | trie->states = (reg_trie_state *) |
| 2478 | PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2, |
| 2479 | sizeof(reg_trie_state) ); |
| 2480 | next_alloc = trie->uniquecharcount + 1; |
| 2481 | |
| 2482 | |
| 2483 | for ( cur = first ; cur < last ; cur = regnext( cur ) ) { |
| 2484 | |
| 2485 | regnode *noper = NEXTOPER( cur ); |
| 2486 | const U8 *uc = (U8*)STRING( noper ); |
| 2487 | const U8 *e = uc + STR_LEN( noper ); |
| 2488 | |
| 2489 | U32 state = 1; /* required init */ |
| 2490 | |
| 2491 | U16 charid = 0; /* sanity init */ |
| 2492 | U32 accept_state = 0; /* sanity init */ |
| 2493 | |
| 2494 | U32 wordlen = 0; /* required init */ |
| 2495 | |
| 2496 | if (OP(noper) == NOTHING) { |
| 2497 | regnode *noper_next= regnext(noper); |
| 2498 | if (noper_next != tail && OP(noper_next) == flags) { |
| 2499 | noper = noper_next; |
| 2500 | uc= (U8*)STRING(noper); |
| 2501 | e= uc + STR_LEN(noper); |
| 2502 | } |
| 2503 | } |
| 2504 | |
| 2505 | if ( OP(noper) != NOTHING ) { |
| 2506 | for ( ; uc < e ; uc += len ) { |
| 2507 | |
| 2508 | TRIE_READ_CHAR; |
| 2509 | |
| 2510 | if ( uvc < 256 ) { |
| 2511 | charid = trie->charmap[ uvc ]; |
| 2512 | } else { |
| 2513 | SV* const * const svpp = hv_fetch( widecharmap, |
| 2514 | (char*)&uvc, |
| 2515 | sizeof( UV ), |
| 2516 | 0); |
| 2517 | charid = svpp ? (U16)SvIV(*svpp) : 0; |
| 2518 | } |
| 2519 | if ( charid ) { |
| 2520 | charid--; |
| 2521 | if ( !trie->trans[ state + charid ].next ) { |
| 2522 | trie->trans[ state + charid ].next = next_alloc; |
| 2523 | trie->trans[ state ].check++; |
| 2524 | prev_states[TRIE_NODENUM(next_alloc)] |
| 2525 | = TRIE_NODENUM(state); |
| 2526 | next_alloc += trie->uniquecharcount; |
| 2527 | } |
| 2528 | state = trie->trans[ state + charid ].next; |
| 2529 | } else { |
| 2530 | Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc ); |
| 2531 | } |
| 2532 | /* charid is now 0 if we dont know the char read, or |
| 2533 | * nonzero if we do */ |
| 2534 | } |
| 2535 | } |
| 2536 | accept_state = TRIE_NODENUM( state ); |
| 2537 | TRIE_HANDLE_WORD(accept_state); |
| 2538 | |
| 2539 | } /* end second pass */ |
| 2540 | |
| 2541 | /* and now dump it out before we compress it */ |
| 2542 | DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_table(trie, widecharmap, |
| 2543 | revcharmap, |
| 2544 | next_alloc, depth+1)); |
| 2545 | |
| 2546 | { |
| 2547 | /* |
| 2548 | * Inplace compress the table.* |
| 2549 | |
| 2550 | For sparse data sets the table constructed by the trie algorithm will |
| 2551 | be mostly 0/FAIL transitions or to put it another way mostly empty. |
| 2552 | (Note that leaf nodes will not contain any transitions.) |
| 2553 | |
| 2554 | This algorithm compresses the tables by eliminating most such |
| 2555 | transitions, at the cost of a modest bit of extra work during lookup: |
| 2556 | |
| 2557 | - Each states[] entry contains a .base field which indicates the |
| 2558 | index in the state[] array wheres its transition data is stored. |
| 2559 | |
| 2560 | - If .base is 0 there are no valid transitions from that node. |
| 2561 | |
| 2562 | - If .base is nonzero then charid is added to it to find an entry in |
| 2563 | the trans array. |
| 2564 | |
| 2565 | -If trans[states[state].base+charid].check!=state then the |
| 2566 | transition is taken to be a 0/Fail transition. Thus if there are fail |
| 2567 | transitions at the front of the node then the .base offset will point |
| 2568 | somewhere inside the previous nodes data (or maybe even into a node |
| 2569 | even earlier), but the .check field determines if the transition is |
| 2570 | valid. |
| 2571 | |
| 2572 | XXX - wrong maybe? |
| 2573 | The following process inplace converts the table to the compressed |
| 2574 | table: We first do not compress the root node 1,and mark all its |
| 2575 | .check pointers as 1 and set its .base pointer as 1 as well. This |
| 2576 | allows us to do a DFA construction from the compressed table later, |
| 2577 | and ensures that any .base pointers we calculate later are greater |
| 2578 | than 0. |
| 2579 | |
| 2580 | - We set 'pos' to indicate the first entry of the second node. |
| 2581 | |
| 2582 | - We then iterate over the columns of the node, finding the first and |
| 2583 | last used entry at l and m. We then copy l..m into pos..(pos+m-l), |
| 2584 | and set the .check pointers accordingly, and advance pos |
| 2585 | appropriately and repreat for the next node. Note that when we copy |
| 2586 | the next pointers we have to convert them from the original |
| 2587 | NODEIDX form to NODENUM form as the former is not valid post |
| 2588 | compression. |
| 2589 | |
| 2590 | - If a node has no transitions used we mark its base as 0 and do not |
| 2591 | advance the pos pointer. |
| 2592 | |
| 2593 | - If a node only has one transition we use a second pointer into the |
| 2594 | structure to fill in allocated fail transitions from other states. |
| 2595 | This pointer is independent of the main pointer and scans forward |
| 2596 | looking for null transitions that are allocated to a state. When it |
| 2597 | finds one it writes the single transition into the "hole". If the |
| 2598 | pointer doesnt find one the single transition is appended as normal. |
| 2599 | |
| 2600 | - Once compressed we can Renew/realloc the structures to release the |
| 2601 | excess space. |
| 2602 | |
| 2603 | See "Table-Compression Methods" in sec 3.9 of the Red Dragon, |
| 2604 | specifically Fig 3.47 and the associated pseudocode. |
| 2605 | |
| 2606 | demq |
| 2607 | */ |
| 2608 | const U32 laststate = TRIE_NODENUM( next_alloc ); |
| 2609 | U32 state, charid; |
| 2610 | U32 pos = 0, zp=0; |
| 2611 | trie->statecount = laststate; |
| 2612 | |
| 2613 | for ( state = 1 ; state < laststate ; state++ ) { |
| 2614 | U8 flag = 0; |
| 2615 | const U32 stateidx = TRIE_NODEIDX( state ); |
| 2616 | const U32 o_used = trie->trans[ stateidx ].check; |
| 2617 | U32 used = trie->trans[ stateidx ].check; |
| 2618 | trie->trans[ stateidx ].check = 0; |
| 2619 | |
| 2620 | for ( charid = 0; |
| 2621 | used && charid < trie->uniquecharcount; |
| 2622 | charid++ ) |
| 2623 | { |
| 2624 | if ( flag || trie->trans[ stateidx + charid ].next ) { |
| 2625 | if ( trie->trans[ stateidx + charid ].next ) { |
| 2626 | if (o_used == 1) { |
| 2627 | for ( ; zp < pos ; zp++ ) { |
| 2628 | if ( ! trie->trans[ zp ].next ) { |
| 2629 | break; |
| 2630 | } |
| 2631 | } |
| 2632 | trie->states[ state ].trans.base |
| 2633 | = zp |
| 2634 | + trie->uniquecharcount |
| 2635 | - charid ; |
| 2636 | trie->trans[ zp ].next |
| 2637 | = SAFE_TRIE_NODENUM( trie->trans[ stateidx |
| 2638 | + charid ].next ); |
| 2639 | trie->trans[ zp ].check = state; |
| 2640 | if ( ++zp > pos ) pos = zp; |
| 2641 | break; |
| 2642 | } |
| 2643 | used--; |
| 2644 | } |
| 2645 | if ( !flag ) { |
| 2646 | flag = 1; |
| 2647 | trie->states[ state ].trans.base |
| 2648 | = pos + trie->uniquecharcount - charid ; |
| 2649 | } |
| 2650 | trie->trans[ pos ].next |
| 2651 | = SAFE_TRIE_NODENUM( |
| 2652 | trie->trans[ stateidx + charid ].next ); |
| 2653 | trie->trans[ pos ].check = state; |
| 2654 | pos++; |
| 2655 | } |
| 2656 | } |
| 2657 | } |
| 2658 | trie->lasttrans = pos + 1; |
| 2659 | trie->states = (reg_trie_state *) |
| 2660 | PerlMemShared_realloc( trie->states, laststate |
| 2661 | * sizeof(reg_trie_state) ); |
| 2662 | DEBUG_TRIE_COMPILE_MORE_r( |
| 2663 | PerlIO_printf( Perl_debug_log, |
| 2664 | "%*sAlloc: %d Orig: %"IVdf" elements, Final:%"IVdf". Savings of %%%5.2f\n", |
| 2665 | (int)depth * 2 + 2,"", |
| 2666 | (int)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount |
| 2667 | + 1 ), |
| 2668 | (IV)next_alloc, |
| 2669 | (IV)pos, |
| 2670 | ( ( next_alloc - pos ) * 100 ) / (double)next_alloc ); |
| 2671 | ); |
| 2672 | |
| 2673 | } /* end table compress */ |
| 2674 | } |
| 2675 | DEBUG_TRIE_COMPILE_MORE_r( |
| 2676 | PerlIO_printf(Perl_debug_log, |
| 2677 | "%*sStatecount:%"UVxf" Lasttrans:%"UVxf"\n", |
| 2678 | (int)depth * 2 + 2, "", |
| 2679 | (UV)trie->statecount, |
| 2680 | (UV)trie->lasttrans) |
| 2681 | ); |
| 2682 | /* resize the trans array to remove unused space */ |
| 2683 | trie->trans = (reg_trie_trans *) |
| 2684 | PerlMemShared_realloc( trie->trans, trie->lasttrans |
| 2685 | * sizeof(reg_trie_trans) ); |
| 2686 | |
| 2687 | { /* Modify the program and insert the new TRIE node */ |
| 2688 | U8 nodetype =(U8)(flags & 0xFF); |
| 2689 | char *str=NULL; |
| 2690 | |
| 2691 | #ifdef DEBUGGING |
| 2692 | regnode *optimize = NULL; |
| 2693 | #ifdef RE_TRACK_PATTERN_OFFSETS |
| 2694 | |
| 2695 | U32 mjd_offset = 0; |
| 2696 | U32 mjd_nodelen = 0; |
| 2697 | #endif /* RE_TRACK_PATTERN_OFFSETS */ |
| 2698 | #endif /* DEBUGGING */ |
| 2699 | /* |
| 2700 | This means we convert either the first branch or the first Exact, |
| 2701 | depending on whether the thing following (in 'last') is a branch |
| 2702 | or not and whther first is the startbranch (ie is it a sub part of |
| 2703 | the alternation or is it the whole thing.) |
| 2704 | Assuming its a sub part we convert the EXACT otherwise we convert |
| 2705 | the whole branch sequence, including the first. |
| 2706 | */ |
| 2707 | /* Find the node we are going to overwrite */ |
| 2708 | if ( first != startbranch || OP( last ) == BRANCH ) { |
| 2709 | /* branch sub-chain */ |
| 2710 | NEXT_OFF( first ) = (U16)(last - first); |
| 2711 | #ifdef RE_TRACK_PATTERN_OFFSETS |
| 2712 | DEBUG_r({ |
| 2713 | mjd_offset= Node_Offset((convert)); |
| 2714 | mjd_nodelen= Node_Length((convert)); |
| 2715 | }); |
| 2716 | #endif |
| 2717 | /* whole branch chain */ |
| 2718 | } |
| 2719 | #ifdef RE_TRACK_PATTERN_OFFSETS |
| 2720 | else { |
| 2721 | DEBUG_r({ |
| 2722 | const regnode *nop = NEXTOPER( convert ); |
| 2723 | mjd_offset= Node_Offset((nop)); |
| 2724 | mjd_nodelen= Node_Length((nop)); |
| 2725 | }); |
| 2726 | } |
| 2727 | DEBUG_OPTIMISE_r( |
| 2728 | PerlIO_printf(Perl_debug_log, |
| 2729 | "%*sMJD offset:%"UVuf" MJD length:%"UVuf"\n", |
| 2730 | (int)depth * 2 + 2, "", |
| 2731 | (UV)mjd_offset, (UV)mjd_nodelen) |
| 2732 | ); |
| 2733 | #endif |
| 2734 | /* But first we check to see if there is a common prefix we can |
| 2735 | split out as an EXACT and put in front of the TRIE node. */ |
| 2736 | trie->startstate= 1; |
| 2737 | if ( trie->bitmap && !widecharmap && !trie->jump ) { |
| 2738 | U32 state; |
| 2739 | for ( state = 1 ; state < trie->statecount-1 ; state++ ) { |
| 2740 | U32 ofs = 0; |
| 2741 | I32 idx = -1; |
| 2742 | U32 count = 0; |
| 2743 | const U32 base = trie->states[ state ].trans.base; |
| 2744 | |
| 2745 | if ( trie->states[state].wordnum ) |
| 2746 | count = 1; |
| 2747 | |
| 2748 | for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) { |
| 2749 | if ( ( base + ofs >= trie->uniquecharcount ) && |
| 2750 | ( base + ofs - trie->uniquecharcount < trie->lasttrans ) && |
| 2751 | trie->trans[ base + ofs - trie->uniquecharcount ].check == state ) |
| 2752 | { |
| 2753 | if ( ++count > 1 ) { |
| 2754 | SV **tmp = av_fetch( revcharmap, ofs, 0); |
| 2755 | const U8 *ch = (U8*)SvPV_nolen_const( *tmp ); |
| 2756 | if ( state == 1 ) break; |
| 2757 | if ( count == 2 ) { |
| 2758 | Zero(trie->bitmap, ANYOF_BITMAP_SIZE, char); |
| 2759 | DEBUG_OPTIMISE_r( |
| 2760 | PerlIO_printf(Perl_debug_log, |
| 2761 | "%*sNew Start State=%"UVuf" Class: [", |
| 2762 | (int)depth * 2 + 2, "", |
| 2763 | (UV)state)); |
| 2764 | if (idx >= 0) { |
| 2765 | SV ** const tmp = av_fetch( revcharmap, idx, 0); |
| 2766 | const U8 * const ch = (U8*)SvPV_nolen_const( *tmp ); |
| 2767 | |
| 2768 | TRIE_BITMAP_SET(trie,*ch); |
| 2769 | if ( folder ) |
| 2770 | TRIE_BITMAP_SET(trie, folder[ *ch ]); |
| 2771 | DEBUG_OPTIMISE_r( |
| 2772 | PerlIO_printf(Perl_debug_log, "%s", (char*)ch) |
| 2773 | ); |
| 2774 | } |
| 2775 | } |
| 2776 | TRIE_BITMAP_SET(trie,*ch); |
| 2777 | if ( folder ) |
| 2778 | TRIE_BITMAP_SET(trie,folder[ *ch ]); |
| 2779 | DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"%s", ch)); |
| 2780 | } |
| 2781 | idx = ofs; |
| 2782 | } |
| 2783 | } |
| 2784 | if ( count == 1 ) { |
| 2785 | SV **tmp = av_fetch( revcharmap, idx, 0); |
| 2786 | STRLEN len; |
| 2787 | char *ch = SvPV( *tmp, len ); |
| 2788 | DEBUG_OPTIMISE_r({ |
| 2789 | SV *sv=sv_newmortal(); |
| 2790 | PerlIO_printf( Perl_debug_log, |
| 2791 | "%*sPrefix State: %"UVuf" Idx:%"UVuf" Char='%s'\n", |
| 2792 | (int)depth * 2 + 2, "", |
| 2793 | (UV)state, (UV)idx, |
| 2794 | pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 6, |
| 2795 | PL_colors[0], PL_colors[1], |
| 2796 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) | |
| 2797 | PERL_PV_ESCAPE_FIRSTCHAR |
| 2798 | ) |
| 2799 | ); |
| 2800 | }); |
| 2801 | if ( state==1 ) { |
| 2802 | OP( convert ) = nodetype; |
| 2803 | str=STRING(convert); |
| 2804 | STR_LEN(convert)=0; |
| 2805 | } |
| 2806 | STR_LEN(convert) += len; |
| 2807 | while (len--) |
| 2808 | *str++ = *ch++; |
| 2809 | } else { |
| 2810 | #ifdef DEBUGGING |
| 2811 | if (state>1) |
| 2812 | DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"]\n")); |
| 2813 | #endif |
| 2814 | break; |
| 2815 | } |
| 2816 | } |
| 2817 | trie->prefixlen = (state-1); |
| 2818 | if (str) { |
| 2819 | regnode *n = convert+NODE_SZ_STR(convert); |
| 2820 | NEXT_OFF(convert) = NODE_SZ_STR(convert); |
| 2821 | trie->startstate = state; |
| 2822 | trie->minlen -= (state - 1); |
| 2823 | trie->maxlen -= (state - 1); |
| 2824 | #ifdef DEBUGGING |
| 2825 | /* At least the UNICOS C compiler choked on this |
| 2826 | * being argument to DEBUG_r(), so let's just have |
| 2827 | * it right here. */ |
| 2828 | if ( |
| 2829 | #ifdef PERL_EXT_RE_BUILD |
| 2830 | 1 |
| 2831 | #else |
| 2832 | DEBUG_r_TEST |
| 2833 | #endif |
| 2834 | ) { |
| 2835 | regnode *fix = convert; |
| 2836 | U32 word = trie->wordcount; |
| 2837 | mjd_nodelen++; |
| 2838 | Set_Node_Offset_Length(convert, mjd_offset, state - 1); |
| 2839 | while( ++fix < n ) { |
| 2840 | Set_Node_Offset_Length(fix, 0, 0); |
| 2841 | } |
| 2842 | while (word--) { |
| 2843 | SV ** const tmp = av_fetch( trie_words, word, 0 ); |
| 2844 | if (tmp) { |
| 2845 | if ( STR_LEN(convert) <= SvCUR(*tmp) ) |
| 2846 | sv_chop(*tmp, SvPV_nolen(*tmp) + STR_LEN(convert)); |
| 2847 | else |
| 2848 | sv_chop(*tmp, SvPV_nolen(*tmp) + SvCUR(*tmp)); |
| 2849 | } |
| 2850 | } |
| 2851 | } |
| 2852 | #endif |
| 2853 | if (trie->maxlen) { |
| 2854 | convert = n; |
| 2855 | } else { |
| 2856 | NEXT_OFF(convert) = (U16)(tail - convert); |
| 2857 | DEBUG_r(optimize= n); |
| 2858 | } |
| 2859 | } |
| 2860 | } |
| 2861 | if (!jumper) |
| 2862 | jumper = last; |
| 2863 | if ( trie->maxlen ) { |
| 2864 | NEXT_OFF( convert ) = (U16)(tail - convert); |
| 2865 | ARG_SET( convert, data_slot ); |
| 2866 | /* Store the offset to the first unabsorbed branch in |
| 2867 | jump[0], which is otherwise unused by the jump logic. |
| 2868 | We use this when dumping a trie and during optimisation. */ |
| 2869 | if (trie->jump) |
| 2870 | trie->jump[0] = (U16)(nextbranch - convert); |
| 2871 | |
| 2872 | /* If the start state is not accepting (meaning there is no empty string/NOTHING) |
| 2873 | * and there is a bitmap |
| 2874 | * and the first "jump target" node we found leaves enough room |
| 2875 | * then convert the TRIE node into a TRIEC node, with the bitmap |
| 2876 | * embedded inline in the opcode - this is hypothetically faster. |
| 2877 | */ |
| 2878 | if ( !trie->states[trie->startstate].wordnum |
| 2879 | && trie->bitmap |
| 2880 | && ( (char *)jumper - (char *)convert) >= (int)sizeof(struct regnode_charclass) ) |
| 2881 | { |
| 2882 | OP( convert ) = TRIEC; |
| 2883 | Copy(trie->bitmap, ((struct regnode_charclass *)convert)->bitmap, ANYOF_BITMAP_SIZE, char); |
| 2884 | PerlMemShared_free(trie->bitmap); |
| 2885 | trie->bitmap= NULL; |
| 2886 | } else |
| 2887 | OP( convert ) = TRIE; |
| 2888 | |
| 2889 | /* store the type in the flags */ |
| 2890 | convert->flags = nodetype; |
| 2891 | DEBUG_r({ |
| 2892 | optimize = convert |
| 2893 | + NODE_STEP_REGNODE |
| 2894 | + regarglen[ OP( convert ) ]; |
| 2895 | }); |
| 2896 | /* XXX We really should free up the resource in trie now, |
| 2897 | as we won't use them - (which resources?) dmq */ |
| 2898 | } |
| 2899 | /* needed for dumping*/ |
| 2900 | DEBUG_r(if (optimize) { |
| 2901 | regnode *opt = convert; |
| 2902 | |
| 2903 | while ( ++opt < optimize) { |
| 2904 | Set_Node_Offset_Length(opt,0,0); |
| 2905 | } |
| 2906 | /* |
| 2907 | Try to clean up some of the debris left after the |
| 2908 | optimisation. |
| 2909 | */ |
| 2910 | while( optimize < jumper ) { |
| 2911 | mjd_nodelen += Node_Length((optimize)); |
| 2912 | OP( optimize ) = OPTIMIZED; |
| 2913 | Set_Node_Offset_Length(optimize,0,0); |
| 2914 | optimize++; |
| 2915 | } |
| 2916 | Set_Node_Offset_Length(convert,mjd_offset,mjd_nodelen); |
| 2917 | }); |
| 2918 | } /* end node insert */ |
| 2919 | |
| 2920 | /* Finish populating the prev field of the wordinfo array. Walk back |
| 2921 | * from each accept state until we find another accept state, and if |
| 2922 | * so, point the first word's .prev field at the second word. If the |
| 2923 | * second already has a .prev field set, stop now. This will be the |
| 2924 | * case either if we've already processed that word's accept state, |
| 2925 | * or that state had multiple words, and the overspill words were |
| 2926 | * already linked up earlier. |
| 2927 | */ |
| 2928 | { |
| 2929 | U16 word; |
| 2930 | U32 state; |
| 2931 | U16 prev; |
| 2932 | |
| 2933 | for (word=1; word <= trie->wordcount; word++) { |
| 2934 | prev = 0; |
| 2935 | if (trie->wordinfo[word].prev) |
| 2936 | continue; |
| 2937 | state = trie->wordinfo[word].accept; |
| 2938 | while (state) { |
| 2939 | state = prev_states[state]; |
| 2940 | if (!state) |
| 2941 | break; |
| 2942 | prev = trie->states[state].wordnum; |
| 2943 | if (prev) |
| 2944 | break; |
| 2945 | } |
| 2946 | trie->wordinfo[word].prev = prev; |
| 2947 | } |
| 2948 | Safefree(prev_states); |
| 2949 | } |
| 2950 | |
| 2951 | |
| 2952 | /* and now dump out the compressed format */ |
| 2953 | DEBUG_TRIE_COMPILE_r(dump_trie(trie, widecharmap, revcharmap, depth+1)); |
| 2954 | |
| 2955 | RExC_rxi->data->data[ data_slot + 1 ] = (void*)widecharmap; |
| 2956 | #ifdef DEBUGGING |
| 2957 | RExC_rxi->data->data[ data_slot + TRIE_WORDS_OFFSET ] = (void*)trie_words; |
| 2958 | RExC_rxi->data->data[ data_slot + 3 ] = (void*)revcharmap; |
| 2959 | #else |
| 2960 | SvREFCNT_dec_NN(revcharmap); |
| 2961 | #endif |
| 2962 | return trie->jump |
| 2963 | ? MADE_JUMP_TRIE |
| 2964 | : trie->startstate>1 |
| 2965 | ? MADE_EXACT_TRIE |
| 2966 | : MADE_TRIE; |
| 2967 | } |
| 2968 | |
| 2969 | STATIC regnode * |
| 2970 | S_construct_ahocorasick_from_trie(pTHX_ RExC_state_t *pRExC_state, regnode *source, U32 depth) |
| 2971 | { |
| 2972 | /* The Trie is constructed and compressed now so we can build a fail array if |
| 2973 | * it's needed |
| 2974 | |
| 2975 | This is basically the Aho-Corasick algorithm. Its from exercise 3.31 and |
| 2976 | 3.32 in the |
| 2977 | "Red Dragon" -- Compilers, principles, techniques, and tools. Aho, Sethi, |
| 2978 | Ullman 1985/88 |
| 2979 | ISBN 0-201-10088-6 |
| 2980 | |
| 2981 | We find the fail state for each state in the trie, this state is the longest |
| 2982 | proper suffix of the current state's 'word' that is also a proper prefix of |
| 2983 | another word in our trie. State 1 represents the word '' and is thus the |
| 2984 | default fail state. This allows the DFA not to have to restart after its |
| 2985 | tried and failed a word at a given point, it simply continues as though it |
| 2986 | had been matching the other word in the first place. |
| 2987 | Consider |
| 2988 | 'abcdgu'=~/abcdefg|cdgu/ |
| 2989 | When we get to 'd' we are still matching the first word, we would encounter |
| 2990 | 'g' which would fail, which would bring us to the state representing 'd' in |
| 2991 | the second word where we would try 'g' and succeed, proceeding to match |
| 2992 | 'cdgu'. |
| 2993 | */ |
| 2994 | /* add a fail transition */ |
| 2995 | const U32 trie_offset = ARG(source); |
| 2996 | reg_trie_data *trie=(reg_trie_data *)RExC_rxi->data->data[trie_offset]; |
| 2997 | U32 *q; |
| 2998 | const U32 ucharcount = trie->uniquecharcount; |
| 2999 | const U32 numstates = trie->statecount; |
| 3000 | const U32 ubound = trie->lasttrans + ucharcount; |
| 3001 | U32 q_read = 0; |
| 3002 | U32 q_write = 0; |
| 3003 | U32 charid; |
| 3004 | U32 base = trie->states[ 1 ].trans.base; |
| 3005 | U32 *fail; |
| 3006 | reg_ac_data *aho; |
| 3007 | const U32 data_slot = add_data( pRExC_state, STR_WITH_LEN("T")); |
| 3008 | regnode *stclass; |
| 3009 | GET_RE_DEBUG_FLAGS_DECL; |
| 3010 | |
| 3011 | PERL_ARGS_ASSERT_CONSTRUCT_AHOCORASICK_FROM_TRIE; |
| 3012 | PERL_UNUSED_CONTEXT; |
| 3013 | #ifndef DEBUGGING |
| 3014 | PERL_UNUSED_ARG(depth); |
| 3015 | #endif |
| 3016 | |
| 3017 | if ( OP(source) == TRIE ) { |
| 3018 | struct regnode_1 *op = (struct regnode_1 *) |
| 3019 | PerlMemShared_calloc(1, sizeof(struct regnode_1)); |
| 3020 | StructCopy(source,op,struct regnode_1); |
| 3021 | stclass = (regnode *)op; |
| 3022 | } else { |
| 3023 | struct regnode_charclass *op = (struct regnode_charclass *) |
| 3024 | PerlMemShared_calloc(1, sizeof(struct regnode_charclass)); |
| 3025 | StructCopy(source,op,struct regnode_charclass); |
| 3026 | stclass = (regnode *)op; |
| 3027 | } |
| 3028 | OP(stclass)+=2; /* covert the TRIE type to its AHO-CORASICK equivalent */ |
| 3029 | |
| 3030 | ARG_SET( stclass, data_slot ); |
| 3031 | aho = (reg_ac_data *) PerlMemShared_calloc( 1, sizeof(reg_ac_data) ); |
| 3032 | RExC_rxi->data->data[ data_slot ] = (void*)aho; |
| 3033 | aho->trie=trie_offset; |
| 3034 | aho->states=(reg_trie_state *)PerlMemShared_malloc( numstates * sizeof(reg_trie_state) ); |
| 3035 | Copy( trie->states, aho->states, numstates, reg_trie_state ); |
| 3036 | Newxz( q, numstates, U32); |
| 3037 | aho->fail = (U32 *) PerlMemShared_calloc( numstates, sizeof(U32) ); |
| 3038 | aho->refcount = 1; |
| 3039 | fail = aho->fail; |
| 3040 | /* initialize fail[0..1] to be 1 so that we always have |
| 3041 | a valid final fail state */ |
| 3042 | fail[ 0 ] = fail[ 1 ] = 1; |
| 3043 | |
| 3044 | for ( charid = 0; charid < ucharcount ; charid++ ) { |
| 3045 | const U32 newstate = TRIE_TRANS_STATE( 1, base, ucharcount, charid, 0 ); |
| 3046 | if ( newstate ) { |
| 3047 | q[ q_write ] = newstate; |
| 3048 | /* set to point at the root */ |
| 3049 | fail[ q[ q_write++ ] ]=1; |
| 3050 | } |
| 3051 | } |
| 3052 | while ( q_read < q_write) { |
| 3053 | const U32 cur = q[ q_read++ % numstates ]; |
| 3054 | base = trie->states[ cur ].trans.base; |
| 3055 | |
| 3056 | for ( charid = 0 ; charid < ucharcount ; charid++ ) { |
| 3057 | const U32 ch_state = TRIE_TRANS_STATE( cur, base, ucharcount, charid, 1 ); |
| 3058 | if (ch_state) { |
| 3059 | U32 fail_state = cur; |
| 3060 | U32 fail_base; |
| 3061 | do { |
| 3062 | fail_state = fail[ fail_state ]; |
| 3063 | fail_base = aho->states[ fail_state ].trans.base; |
| 3064 | } while ( !TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ) ); |
| 3065 | |
| 3066 | fail_state = TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ); |
| 3067 | fail[ ch_state ] = fail_state; |
| 3068 | if ( !aho->states[ ch_state ].wordnum && aho->states[ fail_state ].wordnum ) |
| 3069 | { |
| 3070 | aho->states[ ch_state ].wordnum = aho->states[ fail_state ].wordnum; |
| 3071 | } |
| 3072 | q[ q_write++ % numstates] = ch_state; |
| 3073 | } |
| 3074 | } |
| 3075 | } |
| 3076 | /* restore fail[0..1] to 0 so that we "fall out" of the AC loop |
| 3077 | when we fail in state 1, this allows us to use the |
| 3078 | charclass scan to find a valid start char. This is based on the principle |
| 3079 | that theres a good chance the string being searched contains lots of stuff |
| 3080 | that cant be a start char. |
| 3081 | */ |
| 3082 | fail[ 0 ] = fail[ 1 ] = 0; |
| 3083 | DEBUG_TRIE_COMPILE_r({ |
| 3084 | PerlIO_printf(Perl_debug_log, |
| 3085 | "%*sStclass Failtable (%"UVuf" states): 0", |
| 3086 | (int)(depth * 2), "", (UV)numstates |
| 3087 | ); |
| 3088 | for( q_read=1; q_read<numstates; q_read++ ) { |
| 3089 | PerlIO_printf(Perl_debug_log, ", %"UVuf, (UV)fail[q_read]); |
| 3090 | } |
| 3091 | PerlIO_printf(Perl_debug_log, "\n"); |
| 3092 | }); |
| 3093 | Safefree(q); |
| 3094 | /*RExC_seen |= REG_TRIEDFA_SEEN;*/ |
| 3095 | return stclass; |
| 3096 | } |
| 3097 | |
| 3098 | |
| 3099 | #define DEBUG_PEEP(str,scan,depth) \ |
| 3100 | DEBUG_OPTIMISE_r({if (scan){ \ |
| 3101 | SV * const mysv=sv_newmortal(); \ |
| 3102 | regnode *Next = regnext(scan); \ |
| 3103 | regprop(RExC_rx, mysv, scan, NULL); \ |
| 3104 | PerlIO_printf(Perl_debug_log, "%*s" str ">%3d: %s (%d)\n", \ |
| 3105 | (int)depth*2, "", REG_NODE_NUM(scan), SvPV_nolen_const(mysv),\ |
| 3106 | Next ? (REG_NODE_NUM(Next)) : 0 ); \ |
| 3107 | }}); |
| 3108 | |
| 3109 | |
| 3110 | /* The below joins as many adjacent EXACTish nodes as possible into a single |
| 3111 | * one. The regop may be changed if the node(s) contain certain sequences that |
| 3112 | * require special handling. The joining is only done if: |
| 3113 | * 1) there is room in the current conglomerated node to entirely contain the |
| 3114 | * next one. |
| 3115 | * 2) they are the exact same node type |
| 3116 | * |
| 3117 | * The adjacent nodes actually may be separated by NOTHING-kind nodes, and |
| 3118 | * these get optimized out |
| 3119 | * |
| 3120 | * If a node is to match under /i (folded), the number of characters it matches |
| 3121 | * can be different than its character length if it contains a multi-character |
| 3122 | * fold. *min_subtract is set to the total delta number of characters of the |
| 3123 | * input nodes. |
| 3124 | * |
| 3125 | * And *unfolded_multi_char is set to indicate whether or not the node contains |
| 3126 | * an unfolded multi-char fold. This happens when whether the fold is valid or |
| 3127 | * not won't be known until runtime; namely for EXACTF nodes that contain LATIN |
| 3128 | * SMALL LETTER SHARP S, as only if the target string being matched against |
| 3129 | * turns out to be UTF-8 is that fold valid; and also for EXACTFL nodes whose |
| 3130 | * folding rules depend on the locale in force at runtime. (Multi-char folds |
| 3131 | * whose components are all above the Latin1 range are not run-time locale |
| 3132 | * dependent, and have already been folded by the time this function is |
| 3133 | * called.) |
| 3134 | * |
| 3135 | * This is as good a place as any to discuss the design of handling these |
| 3136 | * multi-character fold sequences. It's been wrong in Perl for a very long |
| 3137 | * time. There are three code points in Unicode whose multi-character folds |
| 3138 | * were long ago discovered to mess things up. The previous designs for |
| 3139 | * dealing with these involved assigning a special node for them. This |
| 3140 | * approach doesn't always work, as evidenced by this example: |
| 3141 | * "\xDFs" =~ /s\xDF/ui # Used to fail before these patches |
| 3142 | * Both sides fold to "sss", but if the pattern is parsed to create a node that |
| 3143 | * would match just the \xDF, it won't be able to handle the case where a |
| 3144 | * successful match would have to cross the node's boundary. The new approach |
| 3145 | * that hopefully generally solves the problem generates an EXACTFU_SS node |
| 3146 | * that is "sss" in this case. |
| 3147 | * |
| 3148 | * It turns out that there are problems with all multi-character folds, and not |
| 3149 | * just these three. Now the code is general, for all such cases. The |
| 3150 | * approach taken is: |
| 3151 | * 1) This routine examines each EXACTFish node that could contain multi- |
| 3152 | * character folded sequences. Since a single character can fold into |
| 3153 | * such a sequence, the minimum match length for this node is less than |
| 3154 | * the number of characters in the node. This routine returns in |
| 3155 | * *min_subtract how many characters to subtract from the the actual |
| 3156 | * length of the string to get a real minimum match length; it is 0 if |
| 3157 | * there are no multi-char foldeds. This delta is used by the caller to |
| 3158 | * adjust the min length of the match, and the delta between min and max, |
| 3159 | * so that the optimizer doesn't reject these possibilities based on size |
| 3160 | * constraints. |
| 3161 | * 2) For the sequence involving the Sharp s (\xDF), the node type EXACTFU_SS |
| 3162 | * is used for an EXACTFU node that contains at least one "ss" sequence in |
| 3163 | * it. For non-UTF-8 patterns and strings, this is the only case where |
| 3164 | * there is a possible fold length change. That means that a regular |
| 3165 | * EXACTFU node without UTF-8 involvement doesn't have to concern itself |
| 3166 | * with length changes, and so can be processed faster. regexec.c takes |
| 3167 | * advantage of this. Generally, an EXACTFish node that is in UTF-8 is |
| 3168 | * pre-folded by regcomp.c (except EXACTFL, some of whose folds aren't |
| 3169 | * known until runtime). This saves effort in regex matching. However, |
| 3170 | * the pre-folding isn't done for non-UTF8 patterns because the fold of |
| 3171 | * the MICRO SIGN requires UTF-8, and we don't want to slow things down by |
| 3172 | * forcing the pattern into UTF8 unless necessary. Also what EXACTF (and, |
| 3173 | * again, EXACTFL) nodes fold to isn't known until runtime. The fold |
| 3174 | * possibilities for the non-UTF8 patterns are quite simple, except for |
| 3175 | * the sharp s. All the ones that don't involve a UTF-8 target string are |
| 3176 | * members of a fold-pair, and arrays are set up for all of them so that |
| 3177 | * the other member of the pair can be found quickly. Code elsewhere in |
| 3178 | * this file makes sure that in EXACTFU nodes, the sharp s gets folded to |
| 3179 | * 'ss', even if the pattern isn't UTF-8. This avoids the issues |
| 3180 | * described in the next item. |
| 3181 | * 3) A problem remains for unfolded multi-char folds. (These occur when the |
| 3182 | * validity of the fold won't be known until runtime, and so must remain |
| 3183 | * unfolded for now. This happens for the sharp s in EXACTF and EXACTFA |
| 3184 | * nodes when the pattern isn't in UTF-8. (Note, BTW, that there cannot |
| 3185 | * be an EXACTF node with a UTF-8 pattern.) They also occur for various |
| 3186 | * folds in EXACTFL nodes, regardless of the UTF-ness of the pattern.) |
| 3187 | * The reason this is a problem is that the optimizer part of regexec.c |
| 3188 | * (probably unwittingly, in Perl_regexec_flags()) makes an assumption |
| 3189 | * that a character in the pattern corresponds to at most a single |
| 3190 | * character in the target string. (And I do mean character, and not byte |
| 3191 | * here, unlike other parts of the documentation that have never been |
| 3192 | * updated to account for multibyte Unicode.) sharp s in EXACTF and |
| 3193 | * EXACTFL nodes can match the two character string 'ss'; in EXACTFA nodes |
| 3194 | * it can match "\x{17F}\x{17F}". These, along with other ones in EXACTFL |
| 3195 | * nodes, violate the assumption, and they are the only instances where it |
| 3196 | * is violated. I'm reluctant to try to change the assumption, as the |
| 3197 | * code involved is impenetrable to me (khw), so instead the code here |
| 3198 | * punts. This routine examines EXACTFL nodes, and (when the pattern |
| 3199 | * isn't UTF-8) EXACTF and EXACTFA for such unfolded folds, and returns a |
| 3200 | * boolean indicating whether or not the node contains such a fold. When |
| 3201 | * it is true, the caller sets a flag that later causes the optimizer in |
| 3202 | * this file to not set values for the floating and fixed string lengths, |
| 3203 | * and thus avoids the optimizer code in regexec.c that makes the invalid |
| 3204 | * assumption. Thus, there is no optimization based on string lengths for |
| 3205 | * EXACTFL nodes that contain these few folds, nor for non-UTF8-pattern |
| 3206 | * EXACTF and EXACTFA nodes that contain the sharp s. (The reason the |
| 3207 | * assumption is wrong only in these cases is that all other non-UTF-8 |
| 3208 | * folds are 1-1; and, for UTF-8 patterns, we pre-fold all other folds to |
| 3209 | * their expanded versions. (Again, we can't prefold sharp s to 'ss' in |
| 3210 | * EXACTF nodes because we don't know at compile time if it actually |
| 3211 | * matches 'ss' or not. For EXACTF nodes it will match iff the target |
| 3212 | * string is in UTF-8. This is in contrast to EXACTFU nodes, where it |
| 3213 | * always matches; and EXACTFA where it never does. In an EXACTFA node in |
| 3214 | * a UTF-8 pattern, sharp s is folded to "\x{17F}\x{17F}, avoiding the |
| 3215 | * problem; but in a non-UTF8 pattern, folding it to that above-Latin1 |
| 3216 | * string would require the pattern to be forced into UTF-8, the overhead |
| 3217 | * of which we want to avoid. Similarly the unfolded multi-char folds in |
| 3218 | * EXACTFL nodes will match iff the locale at the time of match is a UTF-8 |
| 3219 | * locale.) |
| 3220 | * |
| 3221 | * Similarly, the code that generates tries doesn't currently handle |
| 3222 | * not-already-folded multi-char folds, and it looks like a pain to change |
| 3223 | * that. Therefore, trie generation of EXACTFA nodes with the sharp s |
| 3224 | * doesn't work. Instead, such an EXACTFA is turned into a new regnode, |
| 3225 | * EXACTFA_NO_TRIE, which the trie code knows not to handle. Most people |
| 3226 | * using /iaa matching will be doing so almost entirely with ASCII |
| 3227 | * strings, so this should rarely be encountered in practice */ |
| 3228 | |
| 3229 | #define JOIN_EXACT(scan,min_subtract,unfolded_multi_char, flags) \ |
| 3230 | if (PL_regkind[OP(scan)] == EXACT) \ |
| 3231 | join_exact(pRExC_state,(scan),(min_subtract),unfolded_multi_char, (flags),NULL,depth+1) |
| 3232 | |
| 3233 | STATIC U32 |
| 3234 | S_join_exact(pTHX_ RExC_state_t *pRExC_state, regnode *scan, |
| 3235 | UV *min_subtract, bool *unfolded_multi_char, |
| 3236 | U32 flags,regnode *val, U32 depth) |
| 3237 | { |
| 3238 | /* Merge several consecutive EXACTish nodes into one. */ |
| 3239 | regnode *n = regnext(scan); |
| 3240 | U32 stringok = 1; |
| 3241 | regnode *next = scan + NODE_SZ_STR(scan); |
| 3242 | U32 merged = 0; |
| 3243 | U32 stopnow = 0; |
| 3244 | #ifdef DEBUGGING |
| 3245 | regnode *stop = scan; |
| 3246 | GET_RE_DEBUG_FLAGS_DECL; |
| 3247 | #else |
| 3248 | PERL_UNUSED_ARG(depth); |
| 3249 | #endif |
| 3250 | |
| 3251 | PERL_ARGS_ASSERT_JOIN_EXACT; |
| 3252 | #ifndef EXPERIMENTAL_INPLACESCAN |
| 3253 | PERL_UNUSED_ARG(flags); |
| 3254 | PERL_UNUSED_ARG(val); |
| 3255 | #endif |
| 3256 | DEBUG_PEEP("join",scan,depth); |
| 3257 | |
| 3258 | /* Look through the subsequent nodes in the chain. Skip NOTHING, merge |
| 3259 | * EXACT ones that are mergeable to the current one. */ |
| 3260 | while (n |
| 3261 | && (PL_regkind[OP(n)] == NOTHING |
| 3262 | || (stringok && OP(n) == OP(scan))) |
| 3263 | && NEXT_OFF(n) |
| 3264 | && NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) |
| 3265 | { |
| 3266 | |
| 3267 | if (OP(n) == TAIL || n > next) |
| 3268 | stringok = 0; |
| 3269 | if (PL_regkind[OP(n)] == NOTHING) { |
| 3270 | DEBUG_PEEP("skip:",n,depth); |
| 3271 | NEXT_OFF(scan) += NEXT_OFF(n); |
| 3272 | next = n + NODE_STEP_REGNODE; |
| 3273 | #ifdef DEBUGGING |
| 3274 | if (stringok) |
| 3275 | stop = n; |
| 3276 | #endif |
| 3277 | n = regnext(n); |
| 3278 | } |
| 3279 | else if (stringok) { |
| 3280 | const unsigned int oldl = STR_LEN(scan); |
| 3281 | regnode * const nnext = regnext(n); |
| 3282 | |
| 3283 | /* XXX I (khw) kind of doubt that this works on platforms (should |
| 3284 | * Perl ever run on one) where U8_MAX is above 255 because of lots |
| 3285 | * of other assumptions */ |
| 3286 | /* Don't join if the sum can't fit into a single node */ |
| 3287 | if (oldl + STR_LEN(n) > U8_MAX) |
| 3288 | break; |
| 3289 | |
| 3290 | DEBUG_PEEP("merg",n,depth); |
| 3291 | merged++; |
| 3292 | |
| 3293 | NEXT_OFF(scan) += NEXT_OFF(n); |
| 3294 | STR_LEN(scan) += STR_LEN(n); |
| 3295 | next = n + NODE_SZ_STR(n); |
| 3296 | /* Now we can overwrite *n : */ |
| 3297 | Move(STRING(n), STRING(scan) + oldl, STR_LEN(n), char); |
| 3298 | #ifdef DEBUGGING |
| 3299 | stop = next - 1; |
| 3300 | #endif |
| 3301 | n = nnext; |
| 3302 | if (stopnow) break; |
| 3303 | } |
| 3304 | |
| 3305 | #ifdef EXPERIMENTAL_INPLACESCAN |
| 3306 | if (flags && !NEXT_OFF(n)) { |
| 3307 | DEBUG_PEEP("atch", val, depth); |
| 3308 | if (reg_off_by_arg[OP(n)]) { |
| 3309 | ARG_SET(n, val - n); |
| 3310 | } |
| 3311 | else { |
| 3312 | NEXT_OFF(n) = val - n; |
| 3313 | } |
| 3314 | stopnow = 1; |
| 3315 | } |
| 3316 | #endif |
| 3317 | } |
| 3318 | |
| 3319 | *min_subtract = 0; |
| 3320 | *unfolded_multi_char = FALSE; |
| 3321 | |
| 3322 | /* Here, all the adjacent mergeable EXACTish nodes have been merged. We |
| 3323 | * can now analyze for sequences of problematic code points. (Prior to |
| 3324 | * this final joining, sequences could have been split over boundaries, and |
| 3325 | * hence missed). The sequences only happen in folding, hence for any |
| 3326 | * non-EXACT EXACTish node */ |
| 3327 | if (OP(scan) != EXACT) { |
| 3328 | U8* s0 = (U8*) STRING(scan); |
| 3329 | U8* s = s0; |
| 3330 | U8* s_end = s0 + STR_LEN(scan); |
| 3331 | |
| 3332 | int total_count_delta = 0; /* Total delta number of characters that |
| 3333 | multi-char folds expand to */ |
| 3334 | |
| 3335 | /* One pass is made over the node's string looking for all the |
| 3336 | * possibilities. To avoid some tests in the loop, there are two main |
| 3337 | * cases, for UTF-8 patterns (which can't have EXACTF nodes) and |
| 3338 | * non-UTF-8 */ |
| 3339 | if (UTF) { |
| 3340 | U8* folded = NULL; |
| 3341 | |
| 3342 | if (OP(scan) == EXACTFL) { |
| 3343 | U8 *d; |
| 3344 | |
| 3345 | /* An EXACTFL node would already have been changed to another |
| 3346 | * node type unless there is at least one character in it that |
| 3347 | * is problematic; likely a character whose fold definition |
| 3348 | * won't be known until runtime, and so has yet to be folded. |
| 3349 | * For all but the UTF-8 locale, folds are 1-1 in length, but |
| 3350 | * to handle the UTF-8 case, we need to create a temporary |
| 3351 | * folded copy using UTF-8 locale rules in order to analyze it. |
| 3352 | * This is because our macros that look to see if a sequence is |
| 3353 | * a multi-char fold assume everything is folded (otherwise the |
| 3354 | * tests in those macros would be too complicated and slow). |
| 3355 | * Note that here, the non-problematic folds will have already |
| 3356 | * been done, so we can just copy such characters. We actually |
| 3357 | * don't completely fold the EXACTFL string. We skip the |
| 3358 | * unfolded multi-char folds, as that would just create work |
| 3359 | * below to figure out the size they already are */ |
| 3360 | |
| 3361 | Newx(folded, UTF8_MAX_FOLD_CHAR_EXPAND * STR_LEN(scan) + 1, U8); |
| 3362 | d = folded; |
| 3363 | while (s < s_end) { |
| 3364 | STRLEN s_len = UTF8SKIP(s); |
| 3365 | if (! is_PROBLEMATIC_LOCALE_FOLD_utf8(s)) { |
| 3366 | Copy(s, d, s_len, U8); |
| 3367 | d += s_len; |
| 3368 | } |
| 3369 | else if (is_FOLDS_TO_MULTI_utf8(s)) { |
| 3370 | *unfolded_multi_char = TRUE; |
| 3371 | Copy(s, d, s_len, U8); |
| 3372 | d += s_len; |
| 3373 | } |
| 3374 | else if (isASCII(*s)) { |
| 3375 | *(d++) = toFOLD(*s); |
| 3376 | } |
| 3377 | else { |
| 3378 | STRLEN len; |
| 3379 | _to_utf8_fold_flags(s, d, &len, FOLD_FLAGS_FULL); |
| 3380 | d += len; |
| 3381 | } |
| 3382 | s += s_len; |
| 3383 | } |
| 3384 | |
| 3385 | /* Point the remainder of the routine to look at our temporary |
| 3386 | * folded copy */ |
| 3387 | s = folded; |
| 3388 | s_end = d; |
| 3389 | } /* End of creating folded copy of EXACTFL string */ |
| 3390 | |
| 3391 | /* Examine the string for a multi-character fold sequence. UTF-8 |
| 3392 | * patterns have all characters pre-folded by the time this code is |
| 3393 | * executed */ |
| 3394 | while (s < s_end - 1) /* Can stop 1 before the end, as minimum |
| 3395 | length sequence we are looking for is 2 */ |
| 3396 | { |
| 3397 | int count = 0; /* How many characters in a multi-char fold */ |
| 3398 | int len = is_MULTI_CHAR_FOLD_utf8_safe(s, s_end); |
| 3399 | if (! len) { /* Not a multi-char fold: get next char */ |
| 3400 | s += UTF8SKIP(s); |
| 3401 | continue; |
| 3402 | } |
| 3403 | |
| 3404 | /* Nodes with 'ss' require special handling, except for |
| 3405 | * EXACTFA-ish for which there is no multi-char fold to this */ |
| 3406 | if (len == 2 && *s == 's' && *(s+1) == 's' |
| 3407 | && OP(scan) != EXACTFA |
| 3408 | && OP(scan) != EXACTFA_NO_TRIE) |
| 3409 | { |
| 3410 | count = 2; |
| 3411 | if (OP(scan) != EXACTFL) { |
| 3412 | OP(scan) = EXACTFU_SS; |
| 3413 | } |
| 3414 | s += 2; |
| 3415 | } |
| 3416 | else { /* Here is a generic multi-char fold. */ |
| 3417 | U8* multi_end = s + len; |
| 3418 | |
| 3419 | /* Count how many characters are in it. In the case of |
| 3420 | * /aa, no folds which contain ASCII code points are |
| 3421 | * allowed, so check for those, and skip if found. */ |
| 3422 | if (OP(scan) != EXACTFA && OP(scan) != EXACTFA_NO_TRIE) { |
| 3423 | count = utf8_length(s, multi_end); |
| 3424 | s = multi_end; |
| 3425 | } |
| 3426 | else { |
| 3427 | while (s < multi_end) { |
| 3428 | if (isASCII(*s)) { |
| 3429 | s++; |
| 3430 | goto next_iteration; |
| 3431 | } |
| 3432 | else { |
| 3433 | s += UTF8SKIP(s); |
| 3434 | } |
| 3435 | count++; |
| 3436 | } |
| 3437 | } |
| 3438 | } |
| 3439 | |
| 3440 | /* The delta is how long the sequence is minus 1 (1 is how long |
| 3441 | * the character that folds to the sequence is) */ |
| 3442 | total_count_delta += count - 1; |
| 3443 | next_iteration: ; |
| 3444 | } |
| 3445 | |
| 3446 | /* We created a temporary folded copy of the string in EXACTFL |
| 3447 | * nodes. Therefore we need to be sure it doesn't go below zero, |
| 3448 | * as the real string could be shorter */ |
| 3449 | if (OP(scan) == EXACTFL) { |
| 3450 | int total_chars = utf8_length((U8*) STRING(scan), |
| 3451 | (U8*) STRING(scan) + STR_LEN(scan)); |
| 3452 | if (total_count_delta > total_chars) { |
| 3453 | total_count_delta = total_chars; |
| 3454 | } |
| 3455 | } |
| 3456 | |
| 3457 | *min_subtract += total_count_delta; |
| 3458 | Safefree(folded); |
| 3459 | } |
| 3460 | else if (OP(scan) == EXACTFA) { |
| 3461 | |
| 3462 | /* Non-UTF-8 pattern, EXACTFA node. There can't be a multi-char |
| 3463 | * fold to the ASCII range (and there are no existing ones in the |
| 3464 | * upper latin1 range). But, as outlined in the comments preceding |
| 3465 | * this function, we need to flag any occurrences of the sharp s. |
| 3466 | * This character forbids trie formation (because of added |
| 3467 | * complexity) */ |
| 3468 | while (s < s_end) { |
| 3469 | if (*s == LATIN_SMALL_LETTER_SHARP_S) { |
| 3470 | OP(scan) = EXACTFA_NO_TRIE; |
| 3471 | *unfolded_multi_char = TRUE; |
| 3472 | break; |
| 3473 | } |
| 3474 | s++; |
| 3475 | continue; |
| 3476 | } |
| 3477 | } |
| 3478 | else { |
| 3479 | |
| 3480 | /* Non-UTF-8 pattern, not EXACTFA node. Look for the multi-char |
| 3481 | * folds that are all Latin1. As explained in the comments |
| 3482 | * preceding this function, we look also for the sharp s in EXACTF |
| 3483 | * and EXACTFL nodes; it can be in the final position. Otherwise |
| 3484 | * we can stop looking 1 byte earlier because have to find at least |
| 3485 | * two characters for a multi-fold */ |
| 3486 | const U8* upper = (OP(scan) == EXACTF || OP(scan) == EXACTFL) |
| 3487 | ? s_end |
| 3488 | : s_end -1; |
| 3489 | |
| 3490 | while (s < upper) { |
| 3491 | int len = is_MULTI_CHAR_FOLD_latin1_safe(s, s_end); |
| 3492 | if (! len) { /* Not a multi-char fold. */ |
| 3493 | if (*s == LATIN_SMALL_LETTER_SHARP_S |
| 3494 | && (OP(scan) == EXACTF || OP(scan) == EXACTFL)) |
| 3495 | { |
| 3496 | *unfolded_multi_char = TRUE; |
| 3497 | } |
| 3498 | s++; |
| 3499 | continue; |
| 3500 | } |
| 3501 | |
| 3502 | if (len == 2 |
| 3503 | && isALPHA_FOLD_EQ(*s, 's') |
| 3504 | && isALPHA_FOLD_EQ(*(s+1), 's')) |
| 3505 | { |
| 3506 | |
| 3507 | /* EXACTF nodes need to know that the minimum length |
| 3508 | * changed so that a sharp s in the string can match this |
| 3509 | * ss in the pattern, but they remain EXACTF nodes, as they |
| 3510 | * won't match this unless the target string is is UTF-8, |
| 3511 | * which we don't know until runtime. EXACTFL nodes can't |
| 3512 | * transform into EXACTFU nodes */ |
| 3513 | if (OP(scan) != EXACTF && OP(scan) != EXACTFL) { |
| 3514 | OP(scan) = EXACTFU_SS; |
| 3515 | } |
| 3516 | } |
| 3517 | |
| 3518 | *min_subtract += len - 1; |
| 3519 | s += len; |
| 3520 | } |
| 3521 | } |
| 3522 | } |
| 3523 | |
| 3524 | #ifdef DEBUGGING |
| 3525 | /* Allow dumping but overwriting the collection of skipped |
| 3526 | * ops and/or strings with fake optimized ops */ |
| 3527 | n = scan + NODE_SZ_STR(scan); |
| 3528 | while (n <= stop) { |
| 3529 | OP(n) = OPTIMIZED; |
| 3530 | FLAGS(n) = 0; |
| 3531 | NEXT_OFF(n) = 0; |
| 3532 | n++; |
| 3533 | } |
| 3534 | #endif |
| 3535 | DEBUG_OPTIMISE_r(if (merged){DEBUG_PEEP("finl",scan,depth)}); |
| 3536 | return stopnow; |
| 3537 | } |
| 3538 | |
| 3539 | /* REx optimizer. Converts nodes into quicker variants "in place". |
| 3540 | Finds fixed substrings. */ |
| 3541 | |
| 3542 | /* Stops at toplevel WHILEM as well as at "last". At end *scanp is set |
| 3543 | to the position after last scanned or to NULL. */ |
| 3544 | |
| 3545 | #define INIT_AND_WITHP \ |
| 3546 | assert(!and_withp); \ |
| 3547 | Newx(and_withp,1, regnode_ssc); \ |
| 3548 | SAVEFREEPV(and_withp) |
| 3549 | |
| 3550 | /* this is a chain of data about sub patterns we are processing that |
| 3551 | need to be handled separately/specially in study_chunk. Its so |
| 3552 | we can simulate recursion without losing state. */ |
| 3553 | struct scan_frame; |
| 3554 | typedef struct scan_frame { |
| 3555 | regnode *last; /* last node to process in this frame */ |
| 3556 | regnode *next; /* next node to process when last is reached */ |
| 3557 | struct scan_frame *prev; /*previous frame*/ |
| 3558 | U32 prev_recursed_depth; |
| 3559 | I32 stop; /* what stopparen do we use */ |
| 3560 | } scan_frame; |
| 3561 | |
| 3562 | |
| 3563 | STATIC SSize_t |
| 3564 | S_study_chunk(pTHX_ RExC_state_t *pRExC_state, regnode **scanp, |
| 3565 | SSize_t *minlenp, SSize_t *deltap, |
| 3566 | regnode *last, |
| 3567 | scan_data_t *data, |
| 3568 | I32 stopparen, |
| 3569 | U32 recursed_depth, |
| 3570 | regnode_ssc *and_withp, |
| 3571 | U32 flags, U32 depth) |
| 3572 | /* scanp: Start here (read-write). */ |
| 3573 | /* deltap: Write maxlen-minlen here. */ |
| 3574 | /* last: Stop before this one. */ |
| 3575 | /* data: string data about the pattern */ |
| 3576 | /* stopparen: treat close N as END */ |
| 3577 | /* recursed: which subroutines have we recursed into */ |
| 3578 | /* and_withp: Valid if flags & SCF_DO_STCLASS_OR */ |
| 3579 | { |
| 3580 | /* There must be at least this number of characters to match */ |
| 3581 | SSize_t min = 0; |
| 3582 | I32 pars = 0, code; |
| 3583 | regnode *scan = *scanp, *next; |
| 3584 | SSize_t delta = 0; |
| 3585 | int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF); |
| 3586 | int is_inf_internal = 0; /* The studied chunk is infinite */ |
| 3587 | I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0; |
| 3588 | scan_data_t data_fake; |
| 3589 | SV *re_trie_maxbuff = NULL; |
| 3590 | regnode *first_non_open = scan; |
| 3591 | SSize_t stopmin = SSize_t_MAX; |
| 3592 | scan_frame *frame = NULL; |
| 3593 | GET_RE_DEBUG_FLAGS_DECL; |
| 3594 | |
| 3595 | PERL_ARGS_ASSERT_STUDY_CHUNK; |
| 3596 | |
| 3597 | #ifdef DEBUGGING |
| 3598 | StructCopy(&zero_scan_data, &data_fake, scan_data_t); |
| 3599 | #endif |
| 3600 | if ( depth == 0 ) { |
| 3601 | while (first_non_open && OP(first_non_open) == OPEN) |
| 3602 | first_non_open=regnext(first_non_open); |
| 3603 | } |
| 3604 | |
| 3605 | |
| 3606 | fake_study_recurse: |
| 3607 | while ( scan && OP(scan) != END && scan < last ){ |
| 3608 | UV min_subtract = 0; /* How mmany chars to subtract from the minimum |
| 3609 | node length to get a real minimum (because |
| 3610 | the folded version may be shorter) */ |
| 3611 | bool unfolded_multi_char = FALSE; |
| 3612 | /* Peephole optimizer: */ |
| 3613 | DEBUG_OPTIMISE_MORE_r( |
| 3614 | { |
| 3615 | PerlIO_printf(Perl_debug_log, |
| 3616 | "%*sstudy_chunk stopparen=%ld depth=%lu recursed_depth=%lu ", |
| 3617 | ((int) depth*2), "", (long)stopparen, |
| 3618 | (unsigned long)depth, (unsigned long)recursed_depth); |
| 3619 | if (recursed_depth) { |
| 3620 | U32 i; |
| 3621 | U32 j; |
| 3622 | for ( j = 0 ; j < recursed_depth ; j++ ) { |
| 3623 | PerlIO_printf(Perl_debug_log,"["); |
| 3624 | for ( i = 0 ; i < (U32)RExC_npar ; i++ ) |
| 3625 | PerlIO_printf(Perl_debug_log,"%d", |
| 3626 | PAREN_TEST(RExC_study_chunk_recursed + |
| 3627 | (j * RExC_study_chunk_recursed_bytes), i) |
| 3628 | ? 1 : 0 |
| 3629 | ); |
| 3630 | PerlIO_printf(Perl_debug_log,"]"); |
| 3631 | } |
| 3632 | } |
| 3633 | PerlIO_printf(Perl_debug_log,"\n"); |
| 3634 | } |
| 3635 | ); |
| 3636 | DEBUG_STUDYDATA("Peep:", data, depth); |
| 3637 | DEBUG_PEEP("Peep", scan, depth); |
| 3638 | |
| 3639 | |
| 3640 | /* The reason we do this here we need to deal with things like /(?:f)(?:o)(?:o)/ |
| 3641 | * which cant be dealt with by the normal EXACT parsing code, as each (?:..) is handled |
| 3642 | * by a different invocation of reg() -- Yves |
| 3643 | */ |
| 3644 | JOIN_EXACT(scan,&min_subtract, &unfolded_multi_char, 0); |
| 3645 | |
| 3646 | /* Follow the next-chain of the current node and optimize |
| 3647 | away all the NOTHINGs from it. */ |
| 3648 | if (OP(scan) != CURLYX) { |
| 3649 | const int max = (reg_off_by_arg[OP(scan)] |
| 3650 | ? I32_MAX |
| 3651 | /* I32 may be smaller than U16 on CRAYs! */ |
| 3652 | : (I32_MAX < U16_MAX ? I32_MAX : U16_MAX)); |
| 3653 | int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan)); |
| 3654 | int noff; |
| 3655 | regnode *n = scan; |
| 3656 | |
| 3657 | /* Skip NOTHING and LONGJMP. */ |
| 3658 | while ((n = regnext(n)) |
| 3659 | && ((PL_regkind[OP(n)] == NOTHING && (noff = NEXT_OFF(n))) |
| 3660 | || ((OP(n) == LONGJMP) && (noff = ARG(n)))) |
| 3661 | && off + noff < max) |
| 3662 | off += noff; |
| 3663 | if (reg_off_by_arg[OP(scan)]) |
| 3664 | ARG(scan) = off; |
| 3665 | else |
| 3666 | NEXT_OFF(scan) = off; |
| 3667 | } |
| 3668 | |
| 3669 | |
| 3670 | |
| 3671 | /* The principal pseudo-switch. Cannot be a switch, since we |
| 3672 | look into several different things. */ |
| 3673 | if (OP(scan) == BRANCH || OP(scan) == BRANCHJ |
| 3674 | || OP(scan) == IFTHEN) { |
| 3675 | next = regnext(scan); |
| 3676 | code = OP(scan); |
| 3677 | /* demq: the op(next)==code check is to see if we have |
| 3678 | * "branch-branch" AFAICT */ |
| 3679 | |
| 3680 | if (OP(next) == code || code == IFTHEN) { |
| 3681 | /* NOTE - There is similar code to this block below for |
| 3682 | * handling TRIE nodes on a re-study. If you change stuff here |
| 3683 | * check there too. */ |
| 3684 | SSize_t max1 = 0, min1 = SSize_t_MAX, num = 0; |
| 3685 | regnode_ssc accum; |
| 3686 | regnode * const startbranch=scan; |
| 3687 | |
| 3688 | if (flags & SCF_DO_SUBSTR) { |
| 3689 | /* Cannot merge strings after this. */ |
| 3690 | scan_commit(pRExC_state, data, minlenp, is_inf); |
| 3691 | } |
| 3692 | |
| 3693 | if (flags & SCF_DO_STCLASS) |
| 3694 | ssc_init_zero(pRExC_state, &accum); |
| 3695 | |
| 3696 | while (OP(scan) == code) { |
| 3697 | SSize_t deltanext, minnext, fake; |
| 3698 | I32 f = 0; |
| 3699 | regnode_ssc this_class; |
| 3700 | |
| 3701 | num++; |
| 3702 | data_fake.flags = 0; |
| 3703 | if (data) { |
| 3704 | data_fake.whilem_c = data->whilem_c; |
| 3705 | data_fake.last_closep = data->last_closep; |
| 3706 | } |
| 3707 | else |
| 3708 | data_fake.last_closep = &fake; |
| 3709 | |
| 3710 | data_fake.pos_delta = delta; |
| 3711 | next = regnext(scan); |
| 3712 | scan = NEXTOPER(scan); |
| 3713 | if (code != BRANCH) |
| 3714 | scan = NEXTOPER(scan); |
| 3715 | if (flags & SCF_DO_STCLASS) { |
| 3716 | ssc_init(pRExC_state, &this_class); |
| 3717 | data_fake.start_class = &this_class; |
| 3718 | f = SCF_DO_STCLASS_AND; |
| 3719 | } |
| 3720 | if (flags & SCF_WHILEM_VISITED_POS) |
| 3721 | f |= SCF_WHILEM_VISITED_POS; |
| 3722 | |
| 3723 | /* we suppose the run is continuous, last=next...*/ |
| 3724 | minnext = study_chunk(pRExC_state, &scan, minlenp, |
| 3725 | &deltanext, next, &data_fake, stopparen, |
| 3726 | recursed_depth, NULL, f,depth+1); |
| 3727 | if (min1 > minnext) |
| 3728 | min1 = minnext; |
| 3729 | if (deltanext == SSize_t_MAX) { |
| 3730 | is_inf = is_inf_internal = 1; |
| 3731 | max1 = SSize_t_MAX; |
| 3732 | } else if (max1 < minnext + deltanext) |
| 3733 | max1 = minnext + deltanext; |
| 3734 | scan = next; |
| 3735 | if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) |
| 3736 | pars++; |
| 3737 | if (data_fake.flags & SCF_SEEN_ACCEPT) { |
| 3738 | if ( stopmin > minnext) |
| 3739 | stopmin = min + min1; |
| 3740 | flags &= ~SCF_DO_SUBSTR; |
| 3741 | if (data) |
| 3742 | data->flags |= SCF_SEEN_ACCEPT; |
| 3743 | } |
| 3744 | if (data) { |
| 3745 | if (data_fake.flags & SF_HAS_EVAL) |
| 3746 | data->flags |= SF_HAS_EVAL; |
| 3747 | data->whilem_c = data_fake.whilem_c; |
| 3748 | } |
| 3749 | if (flags & SCF_DO_STCLASS) |
| 3750 | ssc_or(pRExC_state, &accum, (regnode_charclass*)&this_class); |
| 3751 | } |
| 3752 | if (code == IFTHEN && num < 2) /* Empty ELSE branch */ |
| 3753 | min1 = 0; |
| 3754 | if (flags & SCF_DO_SUBSTR) { |
| 3755 | data->pos_min += min1; |
| 3756 | if (data->pos_delta >= SSize_t_MAX - (max1 - min1)) |
| 3757 | data->pos_delta = SSize_t_MAX; |
| 3758 | else |
| 3759 | data->pos_delta += max1 - min1; |
| 3760 | if (max1 != min1 || is_inf) |
| 3761 | data->longest = &(data->longest_float); |
| 3762 | } |
| 3763 | min += min1; |
| 3764 | if (delta == SSize_t_MAX |
| 3765 | || SSize_t_MAX - delta - (max1 - min1) < 0) |
| 3766 | delta = SSize_t_MAX; |
| 3767 | else |
| 3768 | delta += max1 - min1; |
| 3769 | if (flags & SCF_DO_STCLASS_OR) { |
| 3770 | ssc_or(pRExC_state, data->start_class, (regnode_charclass*) &accum); |
| 3771 | if (min1) { |
| 3772 | ssc_and(pRExC_state, data->start_class, (regnode_charclass *) and_withp); |
| 3773 | flags &= ~SCF_DO_STCLASS; |
| 3774 | } |
| 3775 | } |
| 3776 | else if (flags & SCF_DO_STCLASS_AND) { |
| 3777 | if (min1) { |
| 3778 | ssc_and(pRExC_state, data->start_class, (regnode_charclass *) &accum); |
| 3779 | flags &= ~SCF_DO_STCLASS; |
| 3780 | } |
| 3781 | else { |
| 3782 | /* Switch to OR mode: cache the old value of |
| 3783 | * data->start_class */ |
| 3784 | INIT_AND_WITHP; |
| 3785 | StructCopy(data->start_class, and_withp, regnode_ssc); |
| 3786 | flags &= ~SCF_DO_STCLASS_AND; |
| 3787 | StructCopy(&accum, data->start_class, regnode_ssc); |
| 3788 | flags |= SCF_DO_STCLASS_OR; |
| 3789 | } |
| 3790 | } |
| 3791 | |
| 3792 | if (PERL_ENABLE_TRIE_OPTIMISATION && |
| 3793 | OP( startbranch ) == BRANCH ) |
| 3794 | { |
| 3795 | /* demq. |
| 3796 | |
| 3797 | Assuming this was/is a branch we are dealing with: 'scan' |
| 3798 | now points at the item that follows the branch sequence, |
| 3799 | whatever it is. We now start at the beginning of the |
| 3800 | sequence and look for subsequences of |
| 3801 | |
| 3802 | BRANCH->EXACT=>x1 |
| 3803 | BRANCH->EXACT=>x2 |
| 3804 | tail |
| 3805 | |
| 3806 | which would be constructed from a pattern like |
| 3807 | /A|LIST|OF|WORDS/ |
| 3808 | |
| 3809 | If we can find such a subsequence we need to turn the first |
| 3810 | element into a trie and then add the subsequent branch exact |
| 3811 | strings to the trie. |
| 3812 | |
| 3813 | We have two cases |
| 3814 | |
| 3815 | 1. patterns where the whole set of branches can be |
| 3816 | converted. |
| 3817 | |
| 3818 | 2. patterns where only a subset can be converted. |
| 3819 | |
| 3820 | In case 1 we can replace the whole set with a single regop |
| 3821 | for the trie. In case 2 we need to keep the start and end |
| 3822 | branches so |
| 3823 | |
| 3824 | 'BRANCH EXACT; BRANCH EXACT; BRANCH X' |
| 3825 | becomes BRANCH TRIE; BRANCH X; |
| 3826 | |
| 3827 | There is an additional case, that being where there is a |
| 3828 | common prefix, which gets split out into an EXACT like node |
| 3829 | preceding the TRIE node. |
| 3830 | |
| 3831 | If x(1..n)==tail then we can do a simple trie, if not we make |
| 3832 | a "jump" trie, such that when we match the appropriate word |
| 3833 | we "jump" to the appropriate tail node. Essentially we turn |
| 3834 | a nested if into a case structure of sorts. |
| 3835 | |
| 3836 | */ |
| 3837 | |
| 3838 | int made=0; |
| 3839 | if (!re_trie_maxbuff) { |
| 3840 | re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1); |
| 3841 | if (!SvIOK(re_trie_maxbuff)) |
| 3842 | sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT); |
| 3843 | } |
| 3844 | if ( SvIV(re_trie_maxbuff)>=0 ) { |
| 3845 | regnode *cur; |
| 3846 | regnode *first = (regnode *)NULL; |
| 3847 | regnode *last = (regnode *)NULL; |
| 3848 | regnode *tail = scan; |
| 3849 | U8 trietype = 0; |
| 3850 | U32 count=0; |
| 3851 | |
| 3852 | #ifdef DEBUGGING |
| 3853 | SV * const mysv = sv_newmortal(); /* for dumping */ |
| 3854 | #endif |
| 3855 | /* var tail is used because there may be a TAIL |
| 3856 | regop in the way. Ie, the exacts will point to the |
| 3857 | thing following the TAIL, but the last branch will |
| 3858 | point at the TAIL. So we advance tail. If we |
| 3859 | have nested (?:) we may have to move through several |
| 3860 | tails. |
| 3861 | */ |
| 3862 | |
| 3863 | while ( OP( tail ) == TAIL ) { |
| 3864 | /* this is the TAIL generated by (?:) */ |
| 3865 | tail = regnext( tail ); |
| 3866 | } |
| 3867 | |
| 3868 | |
| 3869 | DEBUG_TRIE_COMPILE_r({ |
| 3870 | regprop(RExC_rx, mysv, tail, NULL); |
| 3871 | PerlIO_printf( Perl_debug_log, "%*s%s%s\n", |
| 3872 | (int)depth * 2 + 2, "", |
| 3873 | "Looking for TRIE'able sequences. Tail node is: ", |
| 3874 | SvPV_nolen_const( mysv ) |
| 3875 | ); |
| 3876 | }); |
| 3877 | |
| 3878 | /* |
| 3879 | |
| 3880 | Step through the branches |
| 3881 | cur represents each branch, |
| 3882 | noper is the first thing to be matched as part |
| 3883 | of that branch |
| 3884 | noper_next is the regnext() of that node. |
| 3885 | |
| 3886 | We normally handle a case like this |
| 3887 | /FOO[xyz]|BAR[pqr]/ via a "jump trie" but we also |
| 3888 | support building with NOJUMPTRIE, which restricts |
| 3889 | the trie logic to structures like /FOO|BAR/. |
| 3890 | |
| 3891 | If noper is a trieable nodetype then the branch is |
| 3892 | a possible optimization target. If we are building |
| 3893 | under NOJUMPTRIE then we require that noper_next is |
| 3894 | the same as scan (our current position in the regex |
| 3895 | program). |
| 3896 | |
| 3897 | Once we have two or more consecutive such branches |
| 3898 | we can create a trie of the EXACT's contents and |
| 3899 | stitch it in place into the program. |
| 3900 | |
| 3901 | If the sequence represents all of the branches in |
| 3902 | the alternation we replace the entire thing with a |
| 3903 | single TRIE node. |
| 3904 | |
| 3905 | Otherwise when it is a subsequence we need to |
| 3906 | stitch it in place and replace only the relevant |
| 3907 | branches. This means the first branch has to remain |
| 3908 | as it is used by the alternation logic, and its |
| 3909 | next pointer, and needs to be repointed at the item |
| 3910 | on the branch chain following the last branch we |
| 3911 | have optimized away. |
| 3912 | |
| 3913 | This could be either a BRANCH, in which case the |
| 3914 | subsequence is internal, or it could be the item |
| 3915 | following the branch sequence in which case the |
| 3916 | subsequence is at the end (which does not |
| 3917 | necessarily mean the first node is the start of the |
| 3918 | alternation). |
| 3919 | |
| 3920 | TRIE_TYPE(X) is a define which maps the optype to a |
| 3921 | trietype. |
| 3922 | |
| 3923 | optype | trietype |
| 3924 | ----------------+----------- |
| 3925 | NOTHING | NOTHING |
| 3926 | EXACT | EXACT |
| 3927 | EXACTFU | EXACTFU |
| 3928 | EXACTFU_SS | EXACTFU |
| 3929 | EXACTFA | EXACTFA |
| 3930 | |
| 3931 | |
| 3932 | */ |
| 3933 | #define TRIE_TYPE(X) ( ( NOTHING == (X) ) ? NOTHING : \ |
| 3934 | ( EXACT == (X) ) ? EXACT : \ |
| 3935 | ( EXACTFU == (X) || EXACTFU_SS == (X) ) ? EXACTFU : \ |
| 3936 | ( EXACTFA == (X) ) ? EXACTFA : \ |
| 3937 | 0 ) |
| 3938 | |
| 3939 | /* dont use tail as the end marker for this traverse */ |
| 3940 | for ( cur = startbranch ; cur != scan ; cur = regnext( cur ) ) { |
| 3941 | regnode * const noper = NEXTOPER( cur ); |
| 3942 | U8 noper_type = OP( noper ); |
| 3943 | U8 noper_trietype = TRIE_TYPE( noper_type ); |
| 3944 | #if defined(DEBUGGING) || defined(NOJUMPTRIE) |
| 3945 | regnode * const noper_next = regnext( noper ); |
| 3946 | U8 noper_next_type = (noper_next && noper_next != tail) ? OP(noper_next) : 0; |
| 3947 | U8 noper_next_trietype = (noper_next && noper_next != tail) ? TRIE_TYPE( noper_next_type ) :0; |
| 3948 | #endif |
| 3949 | |
| 3950 | DEBUG_TRIE_COMPILE_r({ |
| 3951 | regprop(RExC_rx, mysv, cur, NULL); |
| 3952 | PerlIO_printf( Perl_debug_log, "%*s- %s (%d)", |
| 3953 | (int)depth * 2 + 2,"", SvPV_nolen_const( mysv ), REG_NODE_NUM(cur) ); |
| 3954 | |
| 3955 | regprop(RExC_rx, mysv, noper, NULL); |
| 3956 | PerlIO_printf( Perl_debug_log, " -> %s", |
| 3957 | SvPV_nolen_const(mysv)); |
| 3958 | |
| 3959 | if ( noper_next ) { |
| 3960 | regprop(RExC_rx, mysv, noper_next, NULL); |
| 3961 | PerlIO_printf( Perl_debug_log,"\t=> %s\t", |
| 3962 | SvPV_nolen_const(mysv)); |
| 3963 | } |
| 3964 | PerlIO_printf( Perl_debug_log, "(First==%d,Last==%d,Cur==%d,tt==%s,nt==%s,nnt==%s)\n", |
| 3965 | REG_NODE_NUM(first), REG_NODE_NUM(last), REG_NODE_NUM(cur), |
| 3966 | PL_reg_name[trietype], PL_reg_name[noper_trietype], PL_reg_name[noper_next_trietype] |
| 3967 | ); |
| 3968 | }); |
| 3969 | |
| 3970 | /* Is noper a trieable nodetype that can be merged |
| 3971 | * with the current trie (if there is one)? */ |
| 3972 | if ( noper_trietype |
| 3973 | && |
| 3974 | ( |
| 3975 | ( noper_trietype == NOTHING) |
| 3976 | || ( trietype == NOTHING ) |
| 3977 | || ( trietype == noper_trietype ) |
| 3978 | ) |
| 3979 | #ifdef NOJUMPTRIE |
| 3980 | && noper_next == tail |
| 3981 | #endif |
| 3982 | && count < U16_MAX) |
| 3983 | { |
| 3984 | /* Handle mergable triable node Either we are |
| 3985 | * the first node in a new trieable sequence, |
| 3986 | * in which case we do some bookkeeping, |
| 3987 | * otherwise we update the end pointer. */ |
| 3988 | if ( !first ) { |
| 3989 | first = cur; |
| 3990 | if ( noper_trietype == NOTHING ) { |
| 3991 | #if !defined(DEBUGGING) && !defined(NOJUMPTRIE) |
| 3992 | regnode * const noper_next = regnext( noper ); |
| 3993 | U8 noper_next_type = (noper_next && noper_next!=tail) ? OP(noper_next) : 0; |
| 3994 | U8 noper_next_trietype = noper_next_type ? TRIE_TYPE( noper_next_type ) :0; |
| 3995 | #endif |
| 3996 | |
| 3997 | if ( noper_next_trietype ) { |
| 3998 | trietype = noper_next_trietype; |
| 3999 | } else if (noper_next_type) { |
| 4000 | /* a NOTHING regop is 1 regop wide. |
| 4001 | * We need at least two for a trie |
| 4002 | * so we can't merge this in */ |
| 4003 | first = NULL; |
| 4004 | } |
| 4005 | } else { |
| 4006 | trietype = noper_trietype; |
| 4007 | } |
| 4008 | } else { |
| 4009 | if ( trietype == NOTHING ) |
| 4010 | trietype = noper_trietype; |
| 4011 | last = cur; |
| 4012 | } |
| 4013 | if (first) |
| 4014 | count++; |
| 4015 | } /* end handle mergable triable node */ |
| 4016 | else { |
| 4017 | /* handle unmergable node - |
| 4018 | * noper may either be a triable node which can |
| 4019 | * not be tried together with the current trie, |
| 4020 | * or a non triable node */ |
| 4021 | if ( last ) { |
| 4022 | /* If last is set and trietype is not |
| 4023 | * NOTHING then we have found at least two |
| 4024 | * triable branch sequences in a row of a |
| 4025 | * similar trietype so we can turn them |
| 4026 | * into a trie. If/when we allow NOTHING to |
| 4027 | * start a trie sequence this condition |
| 4028 | * will be required, and it isn't expensive |
| 4029 | * so we leave it in for now. */ |
| 4030 | if ( trietype && trietype != NOTHING ) |
| 4031 | make_trie( pRExC_state, |
| 4032 | startbranch, first, cur, tail, |
| 4033 | count, trietype, depth+1 ); |
| 4034 | last = NULL; /* note: we clear/update |
| 4035 | first, trietype etc below, |
| 4036 | so we dont do it here */ |
| 4037 | } |
| 4038 | if ( noper_trietype |
| 4039 | #ifdef NOJUMPTRIE |
| 4040 | && noper_next == tail |
| 4041 | #endif |
| 4042 | ){ |
| 4043 | /* noper is triable, so we can start a new |
| 4044 | * trie sequence */ |
| 4045 | count = 1; |
| 4046 | first = cur; |
| 4047 | trietype = noper_trietype; |
| 4048 | } else if (first) { |
| 4049 | /* if we already saw a first but the |
| 4050 | * current node is not triable then we have |
| 4051 | * to reset the first information. */ |
| 4052 | count = 0; |
| 4053 | first = NULL; |
| 4054 | trietype = 0; |
| 4055 | } |
| 4056 | } /* end handle unmergable node */ |
| 4057 | } /* loop over branches */ |
| 4058 | DEBUG_TRIE_COMPILE_r({ |
| 4059 | regprop(RExC_rx, mysv, cur, NULL); |
| 4060 | PerlIO_printf( Perl_debug_log, |
| 4061 | "%*s- %s (%d) <SCAN FINISHED>\n", |
| 4062 | (int)depth * 2 + 2, |
| 4063 | "", SvPV_nolen_const( mysv ),REG_NODE_NUM(cur)); |
| 4064 | |
| 4065 | }); |
| 4066 | if ( last && trietype ) { |
| 4067 | if ( trietype != NOTHING ) { |
| 4068 | /* the last branch of the sequence was part of |
| 4069 | * a trie, so we have to construct it here |
| 4070 | * outside of the loop */ |
| 4071 | made= make_trie( pRExC_state, startbranch, |
| 4072 | first, scan, tail, count, |
| 4073 | trietype, depth+1 ); |
| 4074 | #ifdef TRIE_STUDY_OPT |
| 4075 | if ( ((made == MADE_EXACT_TRIE && |
| 4076 | startbranch == first) |
| 4077 | || ( first_non_open == first )) && |
| 4078 | depth==0 ) { |
| 4079 | flags |= SCF_TRIE_RESTUDY; |
| 4080 | if ( startbranch == first |
| 4081 | && scan == tail ) |
| 4082 | { |
| 4083 | RExC_seen &=~REG_TOP_LEVEL_BRANCHES_SEEN; |
| 4084 | } |
| 4085 | } |
| 4086 | #endif |
| 4087 | } else { |
| 4088 | /* at this point we know whatever we have is a |
| 4089 | * NOTHING sequence/branch AND if 'startbranch' |
| 4090 | * is 'first' then we can turn the whole thing |
| 4091 | * into a NOTHING |
| 4092 | */ |
| 4093 | if ( startbranch == first ) { |
| 4094 | regnode *opt; |
| 4095 | /* the entire thing is a NOTHING sequence, |
| 4096 | * something like this: (?:|) So we can |
| 4097 | * turn it into a plain NOTHING op. */ |
| 4098 | DEBUG_TRIE_COMPILE_r({ |
| 4099 | regprop(RExC_rx, mysv, cur, NULL); |
| 4100 | PerlIO_printf( Perl_debug_log, |
| 4101 | "%*s- %s (%d) <NOTHING BRANCH SEQUENCE>\n", (int)depth * 2 + 2, |
| 4102 | "", SvPV_nolen_const( mysv ),REG_NODE_NUM(cur)); |
| 4103 | |
| 4104 | }); |
| 4105 | OP(startbranch)= NOTHING; |
| 4106 | NEXT_OFF(startbranch)= tail - startbranch; |
| 4107 | for ( opt= startbranch + 1; opt < tail ; opt++ ) |
| 4108 | OP(opt)= OPTIMIZED; |
| 4109 | } |
| 4110 | } |
| 4111 | } /* end if ( last) */ |
| 4112 | } /* TRIE_MAXBUF is non zero */ |
| 4113 | |
| 4114 | } /* do trie */ |
| 4115 | |
| 4116 | } |
| 4117 | else if ( code == BRANCHJ ) { /* single branch is optimized. */ |
| 4118 | scan = NEXTOPER(NEXTOPER(scan)); |
| 4119 | } else /* single branch is optimized. */ |
| 4120 | scan = NEXTOPER(scan); |
| 4121 | continue; |
| 4122 | } else if (OP(scan) == SUSPEND || OP(scan) == GOSUB || OP(scan) == GOSTART) { |
| 4123 | scan_frame *newframe = NULL; |
| 4124 | I32 paren; |
| 4125 | regnode *start; |
| 4126 | regnode *end; |
| 4127 | U32 my_recursed_depth= recursed_depth; |
| 4128 | |
| 4129 | if (OP(scan) != SUSPEND) { |
| 4130 | /* set the pointer */ |
| 4131 | if (OP(scan) == GOSUB) { |
| 4132 | paren = ARG(scan); |
| 4133 | RExC_recurse[ARG2L(scan)] = scan; |
| 4134 | start = RExC_open_parens[paren-1]; |
| 4135 | end = RExC_close_parens[paren-1]; |
| 4136 | } else { |
| 4137 | paren = 0; |
| 4138 | start = RExC_rxi->program + 1; |
| 4139 | end = RExC_opend; |
| 4140 | } |
| 4141 | if (!recursed_depth |
| 4142 | || |
| 4143 | !PAREN_TEST(RExC_study_chunk_recursed + ((recursed_depth-1) * RExC_study_chunk_recursed_bytes), paren) |
| 4144 | ) { |
| 4145 | if (!recursed_depth) { |
| 4146 | Zero(RExC_study_chunk_recursed, RExC_study_chunk_recursed_bytes, U8); |
| 4147 | } else { |
| 4148 | Copy(RExC_study_chunk_recursed + ((recursed_depth-1) * RExC_study_chunk_recursed_bytes), |
| 4149 | RExC_study_chunk_recursed + (recursed_depth * RExC_study_chunk_recursed_bytes), |
| 4150 | RExC_study_chunk_recursed_bytes, U8); |
| 4151 | } |
| 4152 | /* we havent recursed into this paren yet, so recurse into it */ |
| 4153 | DEBUG_STUDYDATA("set:", data,depth); |
| 4154 | PAREN_SET(RExC_study_chunk_recursed + (recursed_depth * RExC_study_chunk_recursed_bytes), paren); |
| 4155 | my_recursed_depth= recursed_depth + 1; |
| 4156 | Newx(newframe,1,scan_frame); |
| 4157 | } else { |
| 4158 | DEBUG_STUDYDATA("inf:", data,depth); |
| 4159 | /* some form of infinite recursion, assume infinite length |
| 4160 | * */ |
| 4161 | if (flags & SCF_DO_SUBSTR) { |
| 4162 | scan_commit(pRExC_state, data, minlenp, is_inf); |
| 4163 | data->longest = &(data->longest_float); |
| 4164 | } |
| 4165 | is_inf = is_inf_internal = 1; |
| 4166 | if (flags & SCF_DO_STCLASS_OR) /* Allow everything */ |
| 4167 | ssc_anything(data->start_class); |
| 4168 | flags &= ~SCF_DO_STCLASS; |
| 4169 | } |
| 4170 | } else { |
| 4171 | Newx(newframe,1,scan_frame); |
| 4172 | paren = stopparen; |
| 4173 | start = scan+2; |
| 4174 | end = regnext(scan); |
| 4175 | } |
| 4176 | if (newframe) { |
| 4177 | assert(start); |
| 4178 | assert(end); |
| 4179 | SAVEFREEPV(newframe); |
| 4180 | newframe->next = regnext(scan); |
| 4181 | newframe->last = last; |
| 4182 | newframe->stop = stopparen; |
| 4183 | newframe->prev = frame; |
| 4184 | newframe->prev_recursed_depth = recursed_depth; |
| 4185 | |
| 4186 | DEBUG_STUDYDATA("frame-new:",data,depth); |
| 4187 | DEBUG_PEEP("fnew", scan, depth); |
| 4188 | |
| 4189 | frame = newframe; |
| 4190 | scan = start; |
| 4191 | stopparen = paren; |
| 4192 | last = end; |
| 4193 | depth = depth + 1; |
| 4194 | recursed_depth= my_recursed_depth; |
| 4195 | |
| 4196 | continue; |
| 4197 | } |
| 4198 | } |
| 4199 | else if (OP(scan) == EXACT) { |
| 4200 | SSize_t l = STR_LEN(scan); |
| 4201 | UV uc; |
| 4202 | if (UTF) { |
| 4203 | const U8 * const s = (U8*)STRING(scan); |
| 4204 | uc = utf8_to_uvchr_buf(s, s + l, NULL); |
| 4205 | l = utf8_length(s, s + l); |
| 4206 | } else { |
| 4207 | uc = *((U8*)STRING(scan)); |
| 4208 | } |
| 4209 | min += l; |
| 4210 | if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */ |
| 4211 | /* The code below prefers earlier match for fixed |
| 4212 | offset, later match for variable offset. */ |
| 4213 | if (data->last_end == -1) { /* Update the start info. */ |
| 4214 | data->last_start_min = data->pos_min; |
| 4215 | data->last_start_max = is_inf |
| 4216 | ? SSize_t_MAX : data->pos_min + data->pos_delta; |
| 4217 | } |
| 4218 | sv_catpvn(data->last_found, STRING(scan), STR_LEN(scan)); |
| 4219 | if (UTF) |
| 4220 | SvUTF8_on(data->last_found); |
| 4221 | { |
| 4222 | SV * const sv = data->last_found; |
| 4223 | MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? |
| 4224 | mg_find(sv, PERL_MAGIC_utf8) : NULL; |
| 4225 | if (mg && mg->mg_len >= 0) |
| 4226 | mg->mg_len += utf8_length((U8*)STRING(scan), |
| 4227 | (U8*)STRING(scan)+STR_LEN(scan)); |
| 4228 | } |
| 4229 | data->last_end = data->pos_min + l; |
| 4230 | data->pos_min += l; /* As in the first entry. */ |
| 4231 | data->flags &= ~SF_BEFORE_EOL; |
| 4232 | } |
| 4233 | |
| 4234 | /* ANDing the code point leaves at most it, and not in locale, and |
| 4235 | * can't match null string */ |
| 4236 | if (flags & SCF_DO_STCLASS_AND) { |
| 4237 | ssc_cp_and(data->start_class, uc); |
| 4238 | ANYOF_FLAGS(data->start_class) &= ~ANYOF_EMPTY_STRING; |
| 4239 | ssc_clear_locale(data->start_class); |
| 4240 | } |
| 4241 | else if (flags & SCF_DO_STCLASS_OR) { |
| 4242 | ssc_add_cp(data->start_class, uc); |
| 4243 | ssc_and(pRExC_state, data->start_class, (regnode_charclass *) and_withp); |
| 4244 | |
| 4245 | /* See commit msg 749e076fceedeb708a624933726e7989f2302f6a */ |
| 4246 | ANYOF_FLAGS(data->start_class) &= ~ANYOF_EMPTY_STRING; |
| 4247 | } |
| 4248 | flags &= ~SCF_DO_STCLASS; |
| 4249 | } |
| 4250 | else if (PL_regkind[OP(scan)] == EXACT) { /* But OP != EXACT!, so is |
| 4251 | EXACTFish */ |
| 4252 | SSize_t l = STR_LEN(scan); |
| 4253 | UV uc = *((U8*)STRING(scan)); |
| 4254 | SV* EXACTF_invlist = _new_invlist(4); /* Start out big enough for 2 |
| 4255 | separate code points */ |
| 4256 | const U8 * s = (U8*)STRING(scan); |
| 4257 | |
| 4258 | /* Search for fixed substrings supports EXACT only. */ |
| 4259 | if (flags & SCF_DO_SUBSTR) { |
| 4260 | assert(data); |
| 4261 | scan_commit(pRExC_state, data, minlenp, is_inf); |
| 4262 | } |
| 4263 | if (UTF) { |
| 4264 | uc = utf8_to_uvchr_buf(s, s + l, NULL); |
| 4265 | l = utf8_length(s, s + l); |
| 4266 | } |
| 4267 | if (unfolded_multi_char) { |
| 4268 | RExC_seen |= REG_UNFOLDED_MULTI_SEEN; |
| 4269 | } |
| 4270 | min += l - min_subtract; |
| 4271 | assert (min >= 0); |
| 4272 | delta += min_subtract; |
| 4273 | if (flags & SCF_DO_SUBSTR) { |
| 4274 | data->pos_min += l - min_subtract; |
| 4275 | if (data->pos_min < 0) { |
| 4276 | data->pos_min = 0; |
| 4277 | } |
| 4278 | data->pos_delta += min_subtract; |
| 4279 | if (min_subtract) { |
| 4280 | data->longest = &(data->longest_float); |
| 4281 | } |
| 4282 | } |
| 4283 | |
| 4284 | if (OP(scan) != EXACTFL && flags & SCF_DO_STCLASS_AND) { |
| 4285 | ssc_clear_locale(data->start_class); |
| 4286 | } |
| 4287 | |
| 4288 | if (! UTF) { |
| 4289 | |
| 4290 | /* We punt and assume can match anything if the node begins |
| 4291 | * with a multi-character fold. Things are complicated. For |
| 4292 | * example, /ffi/i could match any of: |
| 4293 | * "\N{LATIN SMALL LIGATURE FFI}" |
| 4294 | * "\N{LATIN SMALL LIGATURE FF}I" |
| 4295 | * "F\N{LATIN SMALL LIGATURE FI}" |
| 4296 | * plus several other things; and making sure we have all the |
| 4297 | * possibilities is hard. */ |
| 4298 | if (is_MULTI_CHAR_FOLD_latin1_safe(s, s + STR_LEN(scan))) { |
| 4299 | EXACTF_invlist = |
| 4300 | _add_range_to_invlist(EXACTF_invlist, 0, UV_MAX); |
| 4301 | } |
| 4302 | else { |
| 4303 | |
| 4304 | /* Any Latin1 range character can potentially match any |
| 4305 | * other depending on the locale */ |
| 4306 | if (OP(scan) == EXACTFL) { |
| 4307 | _invlist_union(EXACTF_invlist, PL_Latin1, |
| 4308 | &EXACTF_invlist); |
| 4309 | } |
| 4310 | else { |
| 4311 | /* But otherwise, it matches at least itself. We can |
| 4312 | * quickly tell if it has a distinct fold, and if so, |
| 4313 | * it matches that as well */ |
| 4314 | EXACTF_invlist = add_cp_to_invlist(EXACTF_invlist, uc); |
| 4315 | if (IS_IN_SOME_FOLD_L1(uc)) { |
| 4316 | EXACTF_invlist = add_cp_to_invlist(EXACTF_invlist, |
| 4317 | PL_fold_latin1[uc]); |
| 4318 | } |
| 4319 | } |
| 4320 | |
| 4321 | /* Some characters match above-Latin1 ones under /i. This |
| 4322 | * is true of EXACTFL ones when the locale is UTF-8 */ |
| 4323 | if (HAS_NONLATIN1_SIMPLE_FOLD_CLOSURE(uc) |
| 4324 | && (! isASCII(uc) || (OP(scan) != EXACTFA |
| 4325 | && OP(scan) != EXACTFA_NO_TRIE))) |
| 4326 | { |
| 4327 | add_above_Latin1_folds(pRExC_state, |
| 4328 | (U8) uc, |
| 4329 | &EXACTF_invlist); |
| 4330 | } |
| 4331 | } |
| 4332 | } |
| 4333 | else { /* Pattern is UTF-8 */ |
| 4334 | U8 folded[UTF8_MAX_FOLD_CHAR_EXPAND * UTF8_MAXBYTES_CASE + 1] = { '\0' }; |
| 4335 | STRLEN foldlen = UTF8SKIP(s); |
| 4336 | const U8* e = s + STR_LEN(scan); |
| 4337 | SV** listp; |
| 4338 | |
| 4339 | /* The only code points that aren't folded in a UTF EXACTFish |
| 4340 | * node are are the problematic ones in EXACTFL nodes */ |
| 4341 | if (OP(scan) == EXACTFL |
| 4342 | && is_PROBLEMATIC_LOCALE_FOLDEDS_START_cp(uc)) |
| 4343 | { |
| 4344 | /* We need to check for the possibility that this EXACTFL |
| 4345 | * node begins with a multi-char fold. Therefore we fold |
| 4346 | * the first few characters of it so that we can make that |
| 4347 | * check */ |
| 4348 | U8 *d = folded; |
| 4349 | int i; |
| 4350 | |
| 4351 | for (i = 0; i < UTF8_MAX_FOLD_CHAR_EXPAND && s < e; i++) { |
| 4352 | if (isASCII(*s)) { |
| 4353 | *(d++) = (U8) toFOLD(*s); |
| 4354 | s++; |
| 4355 | } |
| 4356 | else { |
| 4357 | STRLEN len; |
| 4358 | to_utf8_fold(s, d, &len); |
| 4359 | d += len; |
| 4360 | s += UTF8SKIP(s); |
| 4361 | } |
| 4362 | } |
| 4363 | |
| 4364 | /* And set up so the code below that looks in this folded |
| 4365 | * buffer instead of the node's string */ |
| 4366 | e = d; |
| 4367 | foldlen = UTF8SKIP(folded); |
| 4368 | s = folded; |
| 4369 | } |
| 4370 | |
| 4371 | /* When we reach here 's' points to the fold of the first |
| 4372 | * character(s) of the node; and 'e' points to far enough along |
| 4373 | * the folded string to be just past any possible multi-char |
| 4374 | * fold. 'foldlen' is the length in bytes of the first |
| 4375 | * character in 's' |
| 4376 | * |
| 4377 | * Unlike the non-UTF-8 case, the macro for determining if a |
| 4378 | * string is a multi-char fold requires all the characters to |
| 4379 | * already be folded. This is because of all the complications |
| 4380 | * if not. Note that they are folded anyway, except in EXACTFL |
| 4381 | * nodes. Like the non-UTF case above, we punt if the node |
| 4382 | * begins with a multi-char fold */ |
| 4383 | |
| 4384 | if (is_MULTI_CHAR_FOLD_utf8_safe(s, e)) { |
| 4385 | EXACTF_invlist = |
| 4386 | _add_range_to_invlist(EXACTF_invlist, 0, UV_MAX); |
| 4387 | } |
| 4388 | else { /* Single char fold */ |
| 4389 | |
| 4390 | /* It matches all the things that fold to it, which are |
| 4391 | * found in PL_utf8_foldclosures (including itself) */ |
| 4392 | EXACTF_invlist = add_cp_to_invlist(EXACTF_invlist, uc); |
| 4393 | if (! PL_utf8_foldclosures) { |
| 4394 | _load_PL_utf8_foldclosures(); |
| 4395 | } |
| 4396 | if ((listp = hv_fetch(PL_utf8_foldclosures, |
| 4397 | (char *) s, foldlen, FALSE))) |
| 4398 | { |
| 4399 | AV* list = (AV*) *listp; |
| 4400 | IV k; |
| 4401 | for (k = 0; k <= av_tindex(list); k++) { |
| 4402 | SV** c_p = av_fetch(list, k, FALSE); |
| 4403 | UV c; |
| 4404 | assert(c_p); |
| 4405 | |
| 4406 | c = SvUV(*c_p); |
| 4407 | |
| 4408 | /* /aa doesn't allow folds between ASCII and non- */ |
| 4409 | if ((OP(scan) == EXACTFA || OP(scan) == EXACTFA_NO_TRIE) |
| 4410 | && isASCII(c) != isASCII(uc)) |
| 4411 | { |
| 4412 | continue; |
| 4413 | } |
| 4414 | |
| 4415 | EXACTF_invlist = add_cp_to_invlist(EXACTF_invlist, c); |
| 4416 | } |
| 4417 | } |
| 4418 | } |
| 4419 | } |
| 4420 | if (flags & SCF_DO_STCLASS_AND) { |
| 4421 | ANYOF_FLAGS(data->start_class) &= ~ANYOF_EMPTY_STRING; |
| 4422 | ANYOF_POSIXL_ZERO(data->start_class); |
| 4423 | ssc_intersection(data->start_class, EXACTF_invlist, FALSE); |
| 4424 | } |
| 4425 | else if (flags & SCF_DO_STCLASS_OR) { |
| 4426 | ssc_union(data->start_class, EXACTF_invlist, FALSE); |
| 4427 | ssc_and(pRExC_state, data->start_class, (regnode_charclass *) and_withp); |
| 4428 | |
| 4429 | /* See commit msg 749e076fceedeb708a624933726e7989f2302f6a */ |
| 4430 | ANYOF_FLAGS(data->start_class) &= ~ANYOF_EMPTY_STRING; |
| 4431 | } |
| 4432 | flags &= ~SCF_DO_STCLASS; |
| 4433 | SvREFCNT_dec(EXACTF_invlist); |
| 4434 | } |
| 4435 | else if (REGNODE_VARIES(OP(scan))) { |
| 4436 | SSize_t mincount, maxcount, minnext, deltanext, pos_before = 0; |
| 4437 | I32 fl = 0, f = flags; |
| 4438 | regnode * const oscan = scan; |
| 4439 | regnode_ssc this_class; |
| 4440 | regnode_ssc *oclass = NULL; |
| 4441 | I32 next_is_eval = 0; |
| 4442 | |
| 4443 | switch (PL_regkind[OP(scan)]) { |
| 4444 | case WHILEM: /* End of (?:...)* . */ |
| 4445 | scan = NEXTOPER(scan); |
| 4446 | goto finish; |
| 4447 | case PLUS: |
| 4448 | if (flags & (SCF_DO_SUBSTR | SCF_DO_STCLASS)) { |
| 4449 | next = NEXTOPER(scan); |
| 4450 | if (OP(next) == EXACT || (flags & SCF_DO_STCLASS)) { |
| 4451 | mincount = 1; |
| 4452 | maxcount = REG_INFTY; |
| 4453 | next = regnext(scan); |
| 4454 | scan = NEXTOPER(scan); |
| 4455 | goto do_curly; |
| 4456 | } |
| 4457 | } |
| 4458 | if (flags & SCF_DO_SUBSTR) |
| 4459 | data->pos_min++; |
| 4460 | min++; |
| 4461 | /* FALLTHROUGH */ |
| 4462 | case STAR: |
| 4463 | if (flags & SCF_DO_STCLASS) { |
| 4464 | mincount = 0; |
| 4465 | maxcount = REG_INFTY; |
| 4466 | next = regnext(scan); |
| 4467 | scan = NEXTOPER(scan); |
| 4468 | goto do_curly; |
| 4469 | } |
| 4470 | if (flags & SCF_DO_SUBSTR) { |
| 4471 | scan_commit(pRExC_state, data, minlenp, is_inf); |
| 4472 | /* Cannot extend fixed substrings */ |
| 4473 | data->longest = &(data->longest_float); |
| 4474 | } |
| 4475 | is_inf = is_inf_internal = 1; |
| 4476 | scan = regnext(scan); |
| 4477 | goto optimize_curly_tail; |
| 4478 | case CURLY: |
| 4479 | if (stopparen>0 && (OP(scan)==CURLYN || OP(scan)==CURLYM) |
| 4480 | && (scan->flags == stopparen)) |
| 4481 | { |
| 4482 | mincount = 1; |
| 4483 | maxcount = 1; |
| 4484 | } else { |
| 4485 | mincount = ARG1(scan); |
| 4486 | maxcount = ARG2(scan); |
| 4487 | } |
| 4488 | next = regnext(scan); |
| 4489 | if (OP(scan) == CURLYX) { |
| 4490 | I32 lp = (data ? *(data->last_closep) : 0); |
| 4491 | scan->flags = ((lp <= (I32)U8_MAX) ? (U8)lp : U8_MAX); |
| 4492 | } |
| 4493 | scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS; |
| 4494 | next_is_eval = (OP(scan) == EVAL); |
| 4495 | do_curly: |
| 4496 | if (flags & SCF_DO_SUBSTR) { |
| 4497 | if (mincount == 0) |
| 4498 | scan_commit(pRExC_state, data, minlenp, is_inf); |
| 4499 | /* Cannot extend fixed substrings */ |
| 4500 | pos_before = data->pos_min; |
| 4501 | } |
| 4502 | if (data) { |
| 4503 | fl = data->flags; |
| 4504 | data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL); |
| 4505 | if (is_inf) |
| 4506 | data->flags |= SF_IS_INF; |
| 4507 | } |
| 4508 | if (flags & SCF_DO_STCLASS) { |
| 4509 | ssc_init(pRExC_state, &this_class); |
| 4510 | oclass = data->start_class; |
| 4511 | data->start_class = &this_class; |
| 4512 | f |= SCF_DO_STCLASS_AND; |
| 4513 | f &= ~SCF_DO_STCLASS_OR; |
| 4514 | } |
| 4515 | /* Exclude from super-linear cache processing any {n,m} |
| 4516 | regops for which the combination of input pos and regex |
| 4517 | pos is not enough information to determine if a match |
| 4518 | will be possible. |
| 4519 | |
| 4520 | For example, in the regex /foo(bar\s*){4,8}baz/ with the |
| 4521 | regex pos at the \s*, the prospects for a match depend not |
| 4522 | only on the input position but also on how many (bar\s*) |
| 4523 | repeats into the {4,8} we are. */ |
| 4524 | if ((mincount > 1) || (maxcount > 1 && maxcount != REG_INFTY)) |
| 4525 | f &= ~SCF_WHILEM_VISITED_POS; |
| 4526 | |
| 4527 | /* This will finish on WHILEM, setting scan, or on NULL: */ |
| 4528 | minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext, |
| 4529 | last, data, stopparen, recursed_depth, NULL, |
| 4530 | (mincount == 0 |
| 4531 | ? (f & ~SCF_DO_SUBSTR) |
| 4532 | : f) |
| 4533 | ,depth+1); |
| 4534 | |
| 4535 | if (flags & SCF_DO_STCLASS) |
| 4536 | data->start_class = oclass; |
| 4537 | if (mincount == 0 || minnext == 0) { |
| 4538 | if (flags & SCF_DO_STCLASS_OR) { |
| 4539 | ssc_or(pRExC_state, data->start_class, (regnode_charclass *) &this_class); |
| 4540 | } |
| 4541 | else if (flags & SCF_DO_STCLASS_AND) { |
| 4542 | /* Switch to OR mode: cache the old value of |
| 4543 | * data->start_class */ |
| 4544 | INIT_AND_WITHP; |
| 4545 | StructCopy(data->start_class, and_withp, regnode_ssc); |
| 4546 | flags &= ~SCF_DO_STCLASS_AND; |
| 4547 | StructCopy(&this_class, data->start_class, regnode_ssc); |
| 4548 | flags |= SCF_DO_STCLASS_OR; |
| 4549 | ANYOF_FLAGS(data->start_class) |= ANYOF_EMPTY_STRING; |
| 4550 | } |
| 4551 | } else { /* Non-zero len */ |
| 4552 | if (flags & SCF_DO_STCLASS_OR) { |
| 4553 | ssc_or(pRExC_state, data->start_class, (regnode_charclass *) &this_class); |
| 4554 | ssc_and(pRExC_state, data->start_class, (regnode_charclass *) and_withp); |
| 4555 | } |
| 4556 | else if (flags & SCF_DO_STCLASS_AND) |
| 4557 | ssc_and(pRExC_state, data->start_class, (regnode_charclass *) &this_class); |
| 4558 | flags &= ~SCF_DO_STCLASS; |
| 4559 | } |
| 4560 | if (!scan) /* It was not CURLYX, but CURLY. */ |
| 4561 | scan = next; |
| 4562 | if (!(flags & SCF_TRIE_DOING_RESTUDY) |
| 4563 | /* ? quantifier ok, except for (?{ ... }) */ |
| 4564 | && (next_is_eval || !(mincount == 0 && maxcount == 1)) |
| 4565 | && (minnext == 0) && (deltanext == 0) |
| 4566 | && data && !(data->flags & (SF_HAS_PAR|SF_IN_PAR)) |
| 4567 | && maxcount <= REG_INFTY/3) /* Complement check for big |
| 4568 | count */ |
| 4569 | { |
| 4570 | /* Fatal warnings may leak the regexp without this: */ |
| 4571 | SAVEFREESV(RExC_rx_sv); |
| 4572 | ckWARNreg(RExC_parse, |
| 4573 | "Quantifier unexpected on zero-length expression"); |
| 4574 | (void)ReREFCNT_inc(RExC_rx_sv); |
| 4575 | } |
| 4576 | |
| 4577 | min += minnext * mincount; |
| 4578 | is_inf_internal |= deltanext == SSize_t_MAX |
| 4579 | || (maxcount == REG_INFTY && minnext + deltanext > 0); |
| 4580 | is_inf |= is_inf_internal; |
| 4581 | if (is_inf) { |
| 4582 | delta = SSize_t_MAX; |
| 4583 | } else { |
| 4584 | delta += (minnext + deltanext) * maxcount |
| 4585 | - minnext * mincount; |
| 4586 | } |
| 4587 | /* Try powerful optimization CURLYX => CURLYN. */ |
| 4588 | if ( OP(oscan) == CURLYX && data |
| 4589 | && data->flags & SF_IN_PAR |
| 4590 | && !(data->flags & SF_HAS_EVAL) |
| 4591 | && !deltanext && minnext == 1 ) { |
| 4592 | /* Try to optimize to CURLYN. */ |
| 4593 | regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; |
| 4594 | regnode * const nxt1 = nxt; |
| 4595 | #ifdef DEBUGGING |
| 4596 | regnode *nxt2; |
| 4597 | #endif |
| 4598 | |
| 4599 | /* Skip open. */ |
| 4600 | nxt = regnext(nxt); |
| 4601 | if (!REGNODE_SIMPLE(OP(nxt)) |
| 4602 | && !(PL_regkind[OP(nxt)] == EXACT |
| 4603 | && STR_LEN(nxt) == 1)) |
| 4604 | goto nogo; |
| 4605 | #ifdef DEBUGGING |
| 4606 | nxt2 = nxt; |
| 4607 | #endif |
| 4608 | nxt = regnext(nxt); |
| 4609 | if (OP(nxt) != CLOSE) |
| 4610 | goto nogo; |
| 4611 | if (RExC_open_parens) { |
| 4612 | RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/ |
| 4613 | RExC_close_parens[ARG(nxt1)-1]=nxt+2; /*close->while*/ |
| 4614 | } |
| 4615 | /* Now we know that nxt2 is the only contents: */ |
| 4616 | oscan->flags = (U8)ARG(nxt); |
| 4617 | OP(oscan) = CURLYN; |
| 4618 | OP(nxt1) = NOTHING; /* was OPEN. */ |
| 4619 | |
| 4620 | #ifdef DEBUGGING |
| 4621 | OP(nxt1 + 1) = OPTIMIZED; /* was count. */ |
| 4622 | NEXT_OFF(nxt1+ 1) = 0; /* just for consistency. */ |
| 4623 | NEXT_OFF(nxt2) = 0; /* just for consistency with CURLY. */ |
| 4624 | OP(nxt) = OPTIMIZED; /* was CLOSE. */ |
| 4625 | OP(nxt + 1) = OPTIMIZED; /* was count. */ |
| 4626 | NEXT_OFF(nxt+ 1) = 0; /* just for consistency. */ |
| 4627 | #endif |
| 4628 | } |
| 4629 | nogo: |
| 4630 | |
| 4631 | /* Try optimization CURLYX => CURLYM. */ |
| 4632 | if ( OP(oscan) == CURLYX && data |
| 4633 | && !(data->flags & SF_HAS_PAR) |
| 4634 | && !(data->flags & SF_HAS_EVAL) |
| 4635 | && !deltanext /* atom is fixed width */ |
| 4636 | && minnext != 0 /* CURLYM can't handle zero width */ |
| 4637 | |
| 4638 | /* Nor characters whose fold at run-time may be |
| 4639 | * multi-character */ |
| 4640 | && ! (RExC_seen & REG_UNFOLDED_MULTI_SEEN) |
| 4641 | ) { |
| 4642 | /* XXXX How to optimize if data == 0? */ |
| 4643 | /* Optimize to a simpler form. */ |
| 4644 | regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN */ |
| 4645 | regnode *nxt2; |
| 4646 | |
| 4647 | OP(oscan) = CURLYM; |
| 4648 | while ( (nxt2 = regnext(nxt)) /* skip over embedded stuff*/ |
| 4649 | && (OP(nxt2) != WHILEM)) |
| 4650 | nxt = nxt2; |
| 4651 | OP(nxt2) = SUCCEED; /* Whas WHILEM */ |
| 4652 | /* Need to optimize away parenths. */ |
| 4653 | if ((data->flags & SF_IN_PAR) && OP(nxt) == CLOSE) { |
| 4654 | /* Set the parenth number. */ |
| 4655 | regnode *nxt1 = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN*/ |
| 4656 | |
| 4657 | oscan->flags = (U8)ARG(nxt); |
| 4658 | if (RExC_open_parens) { |
| 4659 | RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/ |
| 4660 | RExC_close_parens[ARG(nxt1)-1]=nxt2+1; /*close->NOTHING*/ |
| 4661 | } |
| 4662 | OP(nxt1) = OPTIMIZED; /* was OPEN. */ |
| 4663 | OP(nxt) = OPTIMIZED; /* was CLOSE. */ |
| 4664 | |
| 4665 | #ifdef DEBUGGING |
| 4666 | OP(nxt1 + 1) = OPTIMIZED; /* was count. */ |
| 4667 | OP(nxt + 1) = OPTIMIZED; /* was count. */ |
| 4668 | NEXT_OFF(nxt1 + 1) = 0; /* just for consistency. */ |
| 4669 | NEXT_OFF(nxt + 1) = 0; /* just for consistency. */ |
| 4670 | #endif |
| 4671 | #if 0 |
| 4672 | while ( nxt1 && (OP(nxt1) != WHILEM)) { |
| 4673 | regnode *nnxt = regnext(nxt1); |
| 4674 | if (nnxt == nxt) { |
| 4675 | if (reg_off_by_arg[OP(nxt1)]) |
| 4676 | ARG_SET(nxt1, nxt2 - nxt1); |
| 4677 | else if (nxt2 - nxt1 < U16_MAX) |
| 4678 | NEXT_OFF(nxt1) = nxt2 - nxt1; |
| 4679 | else |
| 4680 | OP(nxt) = NOTHING; /* Cannot beautify */ |
| 4681 | } |
| 4682 | nxt1 = nnxt; |
| 4683 | } |
| 4684 | #endif |
| 4685 | /* Optimize again: */ |
| 4686 | study_chunk(pRExC_state, &nxt1, minlenp, &deltanext, nxt, |
| 4687 | NULL, stopparen, recursed_depth, NULL, 0,depth+1); |
| 4688 | } |
| 4689 | else |
| 4690 | oscan->flags = 0; |
| 4691 | } |
| 4692 | else if ((OP(oscan) == CURLYX) |
| 4693 | && (flags & SCF_WHILEM_VISITED_POS) |
| 4694 | /* See the comment on a similar expression above. |
| 4695 | However, this time it's not a subexpression |
| 4696 | we care about, but the expression itself. */ |
| 4697 | && (maxcount == REG_INFTY) |
| 4698 | && data && ++data->whilem_c < 16) { |
| 4699 | /* This stays as CURLYX, we can put the count/of pair. */ |
| 4700 | /* Find WHILEM (as in regexec.c) */ |
| 4701 | regnode *nxt = oscan + NEXT_OFF(oscan); |
| 4702 | |
| 4703 | if (OP(PREVOPER(nxt)) == NOTHING) /* LONGJMP */ |
| 4704 | nxt += ARG(nxt); |
| 4705 | PREVOPER(nxt)->flags = (U8)(data->whilem_c |
| 4706 | | (RExC_whilem_seen << 4)); /* On WHILEM */ |
| 4707 | } |
| 4708 | if (data && fl & (SF_HAS_PAR|SF_IN_PAR)) |
| 4709 | pars++; |
| 4710 | if (flags & SCF_DO_SUBSTR) { |
| 4711 | SV *last_str = NULL; |
| 4712 | STRLEN last_chrs = 0; |
| 4713 | int counted = mincount != 0; |
| 4714 | |
| 4715 | if (data->last_end > 0 && mincount != 0) { /* Ends with a |
| 4716 | string. */ |
| 4717 | SSize_t b = pos_before >= data->last_start_min |
| 4718 | ? pos_before : data->last_start_min; |
| 4719 | STRLEN l; |
| 4720 | const char * const s = SvPV_const(data->last_found, l); |
| 4721 | SSize_t old = b - data->last_start_min; |
| 4722 | |
| 4723 | if (UTF) |
| 4724 | old = utf8_hop((U8*)s, old) - (U8*)s; |
| 4725 | l -= old; |
| 4726 | /* Get the added string: */ |
| 4727 | last_str = newSVpvn_utf8(s + old, l, UTF); |
| 4728 | last_chrs = UTF ? utf8_length((U8*)(s + old), |
| 4729 | (U8*)(s + old + l)) : l; |
| 4730 | if (deltanext == 0 && pos_before == b) { |
| 4731 | /* What was added is a constant string */ |
| 4732 | if (mincount > 1) { |
| 4733 | |
| 4734 | SvGROW(last_str, (mincount * l) + 1); |
| 4735 | repeatcpy(SvPVX(last_str) + l, |
| 4736 | SvPVX_const(last_str), l, |
| 4737 | mincount - 1); |
| 4738 | SvCUR_set(last_str, SvCUR(last_str) * mincount); |
| 4739 | /* Add additional parts. */ |
| 4740 | SvCUR_set(data->last_found, |
| 4741 | SvCUR(data->last_found) - l); |
| 4742 | sv_catsv(data->last_found, last_str); |
| 4743 | { |
| 4744 | SV * sv = data->last_found; |
| 4745 | MAGIC *mg = |
| 4746 | SvUTF8(sv) && SvMAGICAL(sv) ? |
| 4747 | mg_find(sv, PERL_MAGIC_utf8) : NULL; |
| 4748 | if (mg && mg->mg_len >= 0) |
| 4749 | mg->mg_len += last_chrs * (mincount-1); |
| 4750 | } |
| 4751 | last_chrs *= mincount; |
| 4752 | data->last_end += l * (mincount - 1); |
| 4753 | } |
| 4754 | } else { |
| 4755 | /* start offset must point into the last copy */ |
| 4756 | data->last_start_min += minnext * (mincount - 1); |
| 4757 | data->last_start_max += is_inf ? SSize_t_MAX |
| 4758 | : (maxcount - 1) * (minnext + data->pos_delta); |
| 4759 | } |
| 4760 | } |
| 4761 | /* It is counted once already... */ |
| 4762 | data->pos_min += minnext * (mincount - counted); |
| 4763 | #if 0 |
| 4764 | PerlIO_printf(Perl_debug_log, "counted=%"UVuf" deltanext=%"UVuf |
| 4765 | " SSize_t_MAX=%"UVuf" minnext=%"UVuf |
| 4766 | " maxcount=%"UVuf" mincount=%"UVuf"\n", |
| 4767 | (UV)counted, (UV)deltanext, (UV)SSize_t_MAX, (UV)minnext, (UV)maxcount, |
| 4768 | (UV)mincount); |
| 4769 | if (deltanext != SSize_t_MAX) |
| 4770 | PerlIO_printf(Perl_debug_log, "LHS=%"UVuf" RHS=%"UVuf"\n", |
| 4771 | (UV)(-counted * deltanext + (minnext + deltanext) * maxcount |
| 4772 | - minnext * mincount), (UV)(SSize_t_MAX - data->pos_delta)); |
| 4773 | #endif |
| 4774 | if (deltanext == SSize_t_MAX |
| 4775 | || -counted * deltanext + (minnext + deltanext) * maxcount - minnext * mincount >= SSize_t_MAX - data->pos_delta) |
| 4776 | data->pos_delta = SSize_t_MAX; |
| 4777 | else |
| 4778 | data->pos_delta += - counted * deltanext + |
| 4779 | (minnext + deltanext) * maxcount - minnext * mincount; |
| 4780 | if (mincount != maxcount) { |
| 4781 | /* Cannot extend fixed substrings found inside |
| 4782 | the group. */ |
| 4783 | scan_commit(pRExC_state, data, minlenp, is_inf); |
| 4784 | if (mincount && last_str) { |
| 4785 | SV * const sv = data->last_found; |
| 4786 | MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? |
| 4787 | mg_find(sv, PERL_MAGIC_utf8) : NULL; |
| 4788 | |
| 4789 | if (mg) |
| 4790 | mg->mg_len = -1; |
| 4791 | sv_setsv(sv, last_str); |
| 4792 | data->last_end = data->pos_min; |
| 4793 | data->last_start_min = data->pos_min - last_chrs; |
| 4794 | data->last_start_max = is_inf |
| 4795 | ? SSize_t_MAX |
| 4796 | : data->pos_min + data->pos_delta - last_chrs; |
| 4797 | } |
| 4798 | data->longest = &(data->longest_float); |
| 4799 | } |
| 4800 | SvREFCNT_dec(last_str); |
| 4801 | } |
| 4802 | if (data && (fl & SF_HAS_EVAL)) |
| 4803 | data->flags |= SF_HAS_EVAL; |
| 4804 | optimize_curly_tail: |
| 4805 | if (OP(oscan) != CURLYX) { |
| 4806 | while (PL_regkind[OP(next = regnext(oscan))] == NOTHING |
| 4807 | && NEXT_OFF(next)) |
| 4808 | NEXT_OFF(oscan) += NEXT_OFF(next); |
| 4809 | } |
| 4810 | continue; |
| 4811 | |
| 4812 | default: |
| 4813 | #ifdef DEBUGGING |
| 4814 | Perl_croak(aTHX_ "panic: unexpected varying REx opcode %d", |
| 4815 | OP(scan)); |
| 4816 | #endif |
| 4817 | case REF: |
| 4818 | case CLUMP: |
| 4819 | if (flags & SCF_DO_SUBSTR) { |
| 4820 | /* Cannot expect anything... */ |
| 4821 | scan_commit(pRExC_state, data, minlenp, is_inf); |
| 4822 | data->longest = &(data->longest_float); |
| 4823 | } |
| 4824 | is_inf = is_inf_internal = 1; |
| 4825 | if (flags & SCF_DO_STCLASS_OR) { |
| 4826 | if (OP(scan) == CLUMP) { |
| 4827 | /* Actually is any start char, but very few code points |
| 4828 | * aren't start characters */ |
| 4829 | ssc_match_all_cp(data->start_class); |
| 4830 | } |
| 4831 | else { |
| 4832 | ssc_anything(data->start_class); |
| 4833 | } |
| 4834 | } |
| 4835 | flags &= ~SCF_DO_STCLASS; |
| 4836 | break; |
| 4837 | } |
| 4838 | } |
| 4839 | else if (OP(scan) == LNBREAK) { |
| 4840 | if (flags & SCF_DO_STCLASS) { |
| 4841 | if (flags & SCF_DO_STCLASS_AND) { |
| 4842 | ssc_intersection(data->start_class, |
| 4843 | PL_XPosix_ptrs[_CC_VERTSPACE], FALSE); |
| 4844 | ssc_clear_locale(data->start_class); |
| 4845 | ANYOF_FLAGS(data->start_class) &= ~ANYOF_EMPTY_STRING; |
| 4846 | } |
| 4847 | else if (flags & SCF_DO_STCLASS_OR) { |
| 4848 | ssc_union(data->start_class, |
| 4849 | PL_XPosix_ptrs[_CC_VERTSPACE], |
| 4850 | FALSE); |
| 4851 | ssc_and(pRExC_state, data->start_class, (regnode_charclass *) and_withp); |
| 4852 | |
| 4853 | /* See commit msg for |
| 4854 | * 749e076fceedeb708a624933726e7989f2302f6a */ |
| 4855 | ANYOF_FLAGS(data->start_class) &= ~ANYOF_EMPTY_STRING; |
| 4856 | } |
| 4857 | flags &= ~SCF_DO_STCLASS; |
| 4858 | } |
| 4859 | min++; |
| 4860 | delta++; /* Because of the 2 char string cr-lf */ |
| 4861 | if (flags & SCF_DO_SUBSTR) { |
| 4862 | /* Cannot expect anything... */ |
| 4863 | scan_commit(pRExC_state, data, minlenp, is_inf); |
| 4864 | data->pos_min += 1; |
| 4865 | data->pos_delta += 1; |
| 4866 | data->longest = &(data->longest_float); |
| 4867 | } |
| 4868 | } |
| 4869 | else if (REGNODE_SIMPLE(OP(scan))) { |
| 4870 | |
| 4871 | if (flags & SCF_DO_SUBSTR) { |
| 4872 | scan_commit(pRExC_state, data, minlenp, is_inf); |
| 4873 | data->pos_min++; |
| 4874 | } |
| 4875 | min++; |
| 4876 | if (flags & SCF_DO_STCLASS) { |
| 4877 | bool invert = 0; |
| 4878 | SV* my_invlist = sv_2mortal(_new_invlist(0)); |
| 4879 | U8 namedclass; |
| 4880 | |
| 4881 | /* See commit msg 749e076fceedeb708a624933726e7989f2302f6a */ |
| 4882 | ANYOF_FLAGS(data->start_class) &= ~ANYOF_EMPTY_STRING; |
| 4883 | |
| 4884 | /* Some of the logic below assumes that switching |
| 4885 | locale on will only add false positives. */ |
| 4886 | switch (OP(scan)) { |
| 4887 | |
| 4888 | default: |
| 4889 | #ifdef DEBUGGING |
| 4890 | Perl_croak(aTHX_ "panic: unexpected simple REx opcode %d", |
| 4891 | OP(scan)); |
| 4892 | #endif |
| 4893 | case CANY: |
| 4894 | case SANY: |
| 4895 | if (flags & SCF_DO_STCLASS_OR) /* Allow everything */ |
| 4896 | ssc_match_all_cp(data->start_class); |
| 4897 | break; |
| 4898 | |
| 4899 | case REG_ANY: |
| 4900 | { |
| 4901 | SV* REG_ANY_invlist = _new_invlist(2); |
| 4902 | REG_ANY_invlist = add_cp_to_invlist(REG_ANY_invlist, |
| 4903 | '\n'); |
| 4904 | if (flags & SCF_DO_STCLASS_OR) { |
| 4905 | ssc_union(data->start_class, |
| 4906 | REG_ANY_invlist, |
| 4907 | TRUE /* TRUE => invert, hence all but \n |
| 4908 | */ |
| 4909 | ); |
| 4910 | } |
| 4911 | else if (flags & SCF_DO_STCLASS_AND) { |
| 4912 | ssc_intersection(data->start_class, |
| 4913 | REG_ANY_invlist, |
| 4914 | TRUE /* TRUE => invert */ |
| 4915 | ); |
| 4916 | ssc_clear_locale(data->start_class); |
| 4917 | } |
| 4918 | SvREFCNT_dec_NN(REG_ANY_invlist); |
| 4919 | } |
| 4920 | break; |
| 4921 | |
| 4922 | case ANYOF: |
| 4923 | if (flags & SCF_DO_STCLASS_AND) |
| 4924 | ssc_and(pRExC_state, data->start_class, |
| 4925 | (regnode_charclass *) scan); |
| 4926 | else |
| 4927 | ssc_or(pRExC_state, data->start_class, |
| 4928 | (regnode_charclass *) scan); |
| 4929 | break; |
| 4930 | |
| 4931 | case NPOSIXL: |
| 4932 | invert = 1; |
| 4933 | /* FALLTHROUGH */ |
| 4934 | |
| 4935 | case POSIXL: |
| 4936 | namedclass = classnum_to_namedclass(FLAGS(scan)) + invert; |
| 4937 | if (flags & SCF_DO_STCLASS_AND) { |
| 4938 | bool was_there = cBOOL( |
| 4939 | ANYOF_POSIXL_TEST(data->start_class, |
| 4940 | namedclass)); |
| 4941 | ANYOF_POSIXL_ZERO(data->start_class); |
| 4942 | if (was_there) { /* Do an AND */ |
| 4943 | ANYOF_POSIXL_SET(data->start_class, namedclass); |
| 4944 | } |
| 4945 | /* No individual code points can now match */ |
| 4946 | data->start_class->invlist |
| 4947 | = sv_2mortal(_new_invlist(0)); |
| 4948 | } |
| 4949 | else { |
| 4950 | int complement = namedclass + ((invert) ? -1 : 1); |
| 4951 | |
| 4952 | assert(flags & SCF_DO_STCLASS_OR); |
| 4953 | |
| 4954 | /* If the complement of this class was already there, |
| 4955 | * the result is that they match all code points, |
| 4956 | * (\d + \D == everything). Remove the classes from |
| 4957 | * future consideration. Locale is not relevant in |
| 4958 | * this case */ |
| 4959 | if (ANYOF_POSIXL_TEST(data->start_class, complement)) { |
| 4960 | ssc_match_all_cp(data->start_class); |
| 4961 | ANYOF_POSIXL_CLEAR(data->start_class, namedclass); |
| 4962 | ANYOF_POSIXL_CLEAR(data->start_class, complement); |
| 4963 | } |
| 4964 | else { /* The usual case; just add this class to the |
| 4965 | existing set */ |
| 4966 | ANYOF_POSIXL_SET(data->start_class, namedclass); |
| 4967 | } |
| 4968 | } |
| 4969 | break; |
| 4970 | |
| 4971 | case NPOSIXA: /* For these, we always know the exact set of |
| 4972 | what's matched */ |
| 4973 | invert = 1; |
| 4974 | /* FALLTHROUGH */ |
| 4975 | case POSIXA: |
| 4976 | if (FLAGS(scan) == _CC_ASCII) { |
| 4977 | my_invlist = PL_XPosix_ptrs[_CC_ASCII]; |
| 4978 | } |
| 4979 | else { |
| 4980 | _invlist_intersection(PL_XPosix_ptrs[FLAGS(scan)], |
| 4981 | PL_XPosix_ptrs[_CC_ASCII], |
| 4982 | &my_invlist); |
| 4983 | } |
| 4984 | goto join_posix; |
| 4985 | |
| 4986 | case NPOSIXD: |
| 4987 | case NPOSIXU: |
| 4988 | invert = 1; |
| 4989 | /* FALLTHROUGH */ |
| 4990 | case POSIXD: |
| 4991 | case POSIXU: |
| 4992 | my_invlist = invlist_clone(PL_XPosix_ptrs[FLAGS(scan)]); |
| 4993 | |
| 4994 | /* NPOSIXD matches all upper Latin1 code points unless the |
| 4995 | * target string being matched is UTF-8, which is |
| 4996 | * unknowable until match time. Since we are going to |
| 4997 | * invert, we want to get rid of all of them so that the |
| 4998 | * inversion will match all */ |
| 4999 | if (OP(scan) == NPOSIXD) { |
| 5000 | _invlist_subtract(my_invlist, PL_UpperLatin1, |
| 5001 | &my_invlist); |
| 5002 | } |
| 5003 | |
| 5004 | join_posix: |
| 5005 | |
| 5006 | if (flags & SCF_DO_STCLASS_AND) { |
| 5007 | ssc_intersection(data->start_class, my_invlist, invert); |
| 5008 | ssc_clear_locale(data->start_class); |
| 5009 | } |
| 5010 | else { |
| 5011 | assert(flags & SCF_DO_STCLASS_OR); |
| 5012 | ssc_union(data->start_class, my_invlist, invert); |
| 5013 | } |
| 5014 | } |
| 5015 | if (flags & SCF_DO_STCLASS_OR) |
| 5016 | ssc_and(pRExC_state, data->start_class, (regnode_charclass *) and_withp); |
| 5017 | flags &= ~SCF_DO_STCLASS; |
| 5018 | } |
| 5019 | } |
| 5020 | else if (PL_regkind[OP(scan)] == EOL && flags & SCF_DO_SUBSTR) { |
| 5021 | data->flags |= (OP(scan) == MEOL |
| 5022 | ? SF_BEFORE_MEOL |
| 5023 | : SF_BEFORE_SEOL); |
| 5024 | scan_commit(pRExC_state, data, minlenp, is_inf); |
| 5025 | |
| 5026 | } |
| 5027 | else if ( PL_regkind[OP(scan)] == BRANCHJ |
| 5028 | /* Lookbehind, or need to calculate parens/evals/stclass: */ |
| 5029 | && (scan->flags || data || (flags & SCF_DO_STCLASS)) |
| 5030 | && (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) |
| 5031 | { |
| 5032 | if ( OP(scan) == UNLESSM && |
| 5033 | scan->flags == 0 && |
| 5034 | OP(NEXTOPER(NEXTOPER(scan))) == NOTHING && |
| 5035 | OP(regnext(NEXTOPER(NEXTOPER(scan)))) == SUCCEED |
| 5036 | ) { |
| 5037 | regnode *opt; |
| 5038 | regnode *upto= regnext(scan); |
| 5039 | DEBUG_PARSE_r({ |
| 5040 | SV * const mysv_val=sv_newmortal(); |
| 5041 | DEBUG_STUDYDATA("OPFAIL",data,depth); |
| 5042 | |
| 5043 | /*DEBUG_PARSE_MSG("opfail");*/ |
| 5044 | regprop(RExC_rx, mysv_val, upto, NULL); |
| 5045 | PerlIO_printf(Perl_debug_log, |
| 5046 | "~ replace with OPFAIL pointed at %s (%"IVdf") offset %"IVdf"\n", |
| 5047 | SvPV_nolen_const(mysv_val), |
| 5048 | (IV)REG_NODE_NUM(upto), |
| 5049 | (IV)(upto - scan) |
| 5050 | ); |
| 5051 | }); |
| 5052 | OP(scan) = OPFAIL; |
| 5053 | NEXT_OFF(scan) = upto - scan; |
| 5054 | for (opt= scan + 1; opt < upto ; opt++) |
| 5055 | OP(opt) = OPTIMIZED; |
| 5056 | scan= upto; |
| 5057 | continue; |
| 5058 | } |
| 5059 | if ( !PERL_ENABLE_POSITIVE_ASSERTION_STUDY |
| 5060 | || OP(scan) == UNLESSM ) |
| 5061 | { |
| 5062 | /* Negative Lookahead/lookbehind |
| 5063 | In this case we can't do fixed string optimisation. |
| 5064 | */ |
| 5065 | |
| 5066 | SSize_t deltanext, minnext, fake = 0; |
| 5067 | regnode *nscan; |
| 5068 | regnode_ssc intrnl; |
| 5069 | int f = 0; |
| 5070 | |
| 5071 | data_fake.flags = 0; |
| 5072 | if (data) { |
| 5073 | data_fake.whilem_c = data->whilem_c; |
| 5074 | data_fake.last_closep = data->last_closep; |
| 5075 | } |
| 5076 | else |
| 5077 | data_fake.last_closep = &fake; |
| 5078 | data_fake.pos_delta = delta; |
| 5079 | if ( flags & SCF_DO_STCLASS && !scan->flags |
| 5080 | && OP(scan) == IFMATCH ) { /* Lookahead */ |
| 5081 | ssc_init(pRExC_state, &intrnl); |
| 5082 | data_fake.start_class = &intrnl; |
| 5083 | f |= SCF_DO_STCLASS_AND; |
| 5084 | } |
| 5085 | if (flags & SCF_WHILEM_VISITED_POS) |
| 5086 | f |= SCF_WHILEM_VISITED_POS; |
| 5087 | next = regnext(scan); |
| 5088 | nscan = NEXTOPER(NEXTOPER(scan)); |
| 5089 | minnext = study_chunk(pRExC_state, &nscan, minlenp, &deltanext, |
| 5090 | last, &data_fake, stopparen, |
| 5091 | recursed_depth, NULL, f, depth+1); |
| 5092 | if (scan->flags) { |
| 5093 | if (deltanext) { |
| 5094 | FAIL("Variable length lookbehind not implemented"); |
| 5095 | } |
| 5096 | else if (minnext > (I32)U8_MAX) { |
| 5097 | FAIL2("Lookbehind longer than %"UVuf" not implemented", |
| 5098 | (UV)U8_MAX); |
| 5099 | } |
| 5100 | scan->flags = (U8)minnext; |
| 5101 | } |
| 5102 | if (data) { |
| 5103 | if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) |
| 5104 | pars++; |
| 5105 | if (data_fake.flags & SF_HAS_EVAL) |
| 5106 | data->flags |= SF_HAS_EVAL; |
| 5107 | data->whilem_c = data_fake.whilem_c; |
| 5108 | } |
| 5109 | if (f & SCF_DO_STCLASS_AND) { |
| 5110 | if (flags & SCF_DO_STCLASS_OR) { |
| 5111 | /* OR before, AND after: ideally we would recurse with |
| 5112 | * data_fake to get the AND applied by study of the |
| 5113 | * remainder of the pattern, and then derecurse; |
| 5114 | * *** HACK *** for now just treat as "no information". |
| 5115 | * See [perl #56690]. |
| 5116 | */ |
| 5117 | ssc_init(pRExC_state, data->start_class); |
| 5118 | } else { |
| 5119 | /* AND before and after: combine and continue. These |
| 5120 | * assertions are zero-length, so can match an EMPTY |
| 5121 | * string */ |
| 5122 | ssc_and(pRExC_state, data->start_class, (regnode_charclass *) &intrnl); |
| 5123 | ANYOF_FLAGS(data->start_class) |= ANYOF_EMPTY_STRING; |
| 5124 | } |
| 5125 | } |
| 5126 | } |
| 5127 | #if PERL_ENABLE_POSITIVE_ASSERTION_STUDY |
| 5128 | else { |
| 5129 | /* Positive Lookahead/lookbehind |
| 5130 | In this case we can do fixed string optimisation, |
| 5131 | but we must be careful about it. Note in the case of |
| 5132 | lookbehind the positions will be offset by the minimum |
| 5133 | length of the pattern, something we won't know about |
| 5134 | until after the recurse. |
| 5135 | */ |
| 5136 | SSize_t deltanext, fake = 0; |
| 5137 | regnode *nscan; |
| 5138 | regnode_ssc intrnl; |
| 5139 | int f = 0; |
| 5140 | /* We use SAVEFREEPV so that when the full compile |
| 5141 | is finished perl will clean up the allocated |
| 5142 | minlens when it's all done. This way we don't |
| 5143 | have to worry about freeing them when we know |
| 5144 | they wont be used, which would be a pain. |
| 5145 | */ |
| 5146 | SSize_t *minnextp; |
| 5147 | Newx( minnextp, 1, SSize_t ); |
| 5148 | SAVEFREEPV(minnextp); |
| 5149 | |
| 5150 | if (data) { |
| 5151 | StructCopy(data, &data_fake, scan_data_t); |
| 5152 | if ((flags & SCF_DO_SUBSTR) && data->last_found) { |
| 5153 | f |= SCF_DO_SUBSTR; |
| 5154 | if (scan->flags) |
| 5155 | scan_commit(pRExC_state, &data_fake, minlenp, is_inf); |
| 5156 | data_fake.last_found=newSVsv(data->last_found); |
| 5157 | } |
| 5158 | } |
| 5159 | else |
| 5160 | data_fake.last_closep = &fake; |
| 5161 | data_fake.flags = 0; |
| 5162 | data_fake.pos_delta = delta; |
| 5163 | if (is_inf) |
| 5164 | data_fake.flags |= SF_IS_INF; |
| 5165 | if ( flags & SCF_DO_STCLASS && !scan->flags |
| 5166 | && OP(scan) == IFMATCH ) { /* Lookahead */ |
| 5167 | ssc_init(pRExC_state, &intrnl); |
| 5168 | data_fake.start_class = &intrnl; |
| 5169 | f |= SCF_DO_STCLASS_AND; |
| 5170 | } |
| 5171 | if (flags & SCF_WHILEM_VISITED_POS) |
| 5172 | f |= SCF_WHILEM_VISITED_POS; |
| 5173 | next = regnext(scan); |
| 5174 | nscan = NEXTOPER(NEXTOPER(scan)); |
| 5175 | |
| 5176 | *minnextp = study_chunk(pRExC_state, &nscan, minnextp, |
| 5177 | &deltanext, last, &data_fake, |
| 5178 | stopparen, recursed_depth, NULL, |
| 5179 | f,depth+1); |
| 5180 | if (scan->flags) { |
| 5181 | if (deltanext) { |
| 5182 | FAIL("Variable length lookbehind not implemented"); |
| 5183 | } |
| 5184 | else if (*minnextp > (I32)U8_MAX) { |
| 5185 | FAIL2("Lookbehind longer than %"UVuf" not implemented", |
| 5186 | (UV)U8_MAX); |
| 5187 | } |
| 5188 | scan->flags = (U8)*minnextp; |
| 5189 | } |
| 5190 | |
| 5191 | *minnextp += min; |
| 5192 | |
| 5193 | if (f & SCF_DO_STCLASS_AND) { |
| 5194 | ssc_and(pRExC_state, data->start_class, (regnode_charclass *) &intrnl); |
| 5195 | ANYOF_FLAGS(data->start_class) |= ANYOF_EMPTY_STRING; |
| 5196 | } |
| 5197 | if (data) { |
| 5198 | if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) |
| 5199 | pars++; |
| 5200 | if (data_fake.flags & SF_HAS_EVAL) |
| 5201 | data->flags |= SF_HAS_EVAL; |
| 5202 | data->whilem_c = data_fake.whilem_c; |
| 5203 | if ((flags & SCF_DO_SUBSTR) && data_fake.last_found) { |
| 5204 | if (RExC_rx->minlen<*minnextp) |
| 5205 | RExC_rx->minlen=*minnextp; |
| 5206 | scan_commit(pRExC_state, &data_fake, minnextp, is_inf); |
| 5207 | SvREFCNT_dec_NN(data_fake.last_found); |
| 5208 | |
| 5209 | if ( data_fake.minlen_fixed != minlenp ) |
| 5210 | { |
| 5211 | data->offset_fixed= data_fake.offset_fixed; |
| 5212 | data->minlen_fixed= data_fake.minlen_fixed; |
| 5213 | data->lookbehind_fixed+= scan->flags; |
| 5214 | } |
| 5215 | if ( data_fake.minlen_float != minlenp ) |
| 5216 | { |
| 5217 | data->minlen_float= data_fake.minlen_float; |
| 5218 | data->offset_float_min=data_fake.offset_float_min; |
| 5219 | data->offset_float_max=data_fake.offset_float_max; |
| 5220 | data->lookbehind_float+= scan->flags; |
| 5221 | } |
| 5222 | } |
| 5223 | } |
| 5224 | } |
| 5225 | #endif |
| 5226 | } |
| 5227 | else if (OP(scan) == OPEN) { |
| 5228 | if (stopparen != (I32)ARG(scan)) |
| 5229 | pars++; |
| 5230 | } |
| 5231 | else if (OP(scan) == CLOSE) { |
| 5232 | if (stopparen == (I32)ARG(scan)) { |
| 5233 | break; |
| 5234 | } |
| 5235 | if ((I32)ARG(scan) == is_par) { |
| 5236 | next = regnext(scan); |
| 5237 | |
| 5238 | if ( next && (OP(next) != WHILEM) && next < last) |
| 5239 | is_par = 0; /* Disable optimization */ |
| 5240 | } |
| 5241 | if (data) |
| 5242 | *(data->last_closep) = ARG(scan); |
| 5243 | } |
| 5244 | else if (OP(scan) == EVAL) { |
| 5245 | if (data) |
| 5246 | data->flags |= SF_HAS_EVAL; |
| 5247 | } |
| 5248 | else if ( PL_regkind[OP(scan)] == ENDLIKE ) { |
| 5249 | if (flags & SCF_DO_SUBSTR) { |
| 5250 | scan_commit(pRExC_state, data, minlenp, is_inf); |
| 5251 | flags &= ~SCF_DO_SUBSTR; |
| 5252 | } |
| 5253 | if (data && OP(scan)==ACCEPT) { |
| 5254 | data->flags |= SCF_SEEN_ACCEPT; |
| 5255 | if (stopmin > min) |
| 5256 | stopmin = min; |
| 5257 | } |
| 5258 | } |
| 5259 | else if (OP(scan) == LOGICAL && scan->flags == 2) /* Embedded follows */ |
| 5260 | { |
| 5261 | if (flags & SCF_DO_SUBSTR) { |
| 5262 | scan_commit(pRExC_state, data, minlenp, is_inf); |
| 5263 | data->longest = &(data->longest_float); |
| 5264 | } |
| 5265 | is_inf = is_inf_internal = 1; |
| 5266 | if (flags & SCF_DO_STCLASS_OR) /* Allow everything */ |
| 5267 | ssc_anything(data->start_class); |
| 5268 | flags &= ~SCF_DO_STCLASS; |
| 5269 | } |
| 5270 | else if (OP(scan) == GPOS) { |
| 5271 | if (!(RExC_rx->intflags & PREGf_GPOS_FLOAT) && |
| 5272 | !(delta || is_inf || (data && data->pos_delta))) |
| 5273 | { |
| 5274 | if (!(RExC_rx->intflags & PREGf_ANCH) && (flags & SCF_DO_SUBSTR)) |
| 5275 | RExC_rx->intflags |= PREGf_ANCH_GPOS; |
| 5276 | if (RExC_rx->gofs < (STRLEN)min) |
| 5277 | RExC_rx->gofs = min; |
| 5278 | } else { |
| 5279 | RExC_rx->intflags |= PREGf_GPOS_FLOAT; |
| 5280 | RExC_rx->gofs = 0; |
| 5281 | } |
| 5282 | } |
| 5283 | #ifdef TRIE_STUDY_OPT |
| 5284 | #ifdef FULL_TRIE_STUDY |
| 5285 | else if (PL_regkind[OP(scan)] == TRIE) { |
| 5286 | /* NOTE - There is similar code to this block above for handling |
| 5287 | BRANCH nodes on the initial study. If you change stuff here |
| 5288 | check there too. */ |
| 5289 | regnode *trie_node= scan; |
| 5290 | regnode *tail= regnext(scan); |
| 5291 | reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ]; |
| 5292 | SSize_t max1 = 0, min1 = SSize_t_MAX; |
| 5293 | regnode_ssc accum; |
| 5294 | |
| 5295 | if (flags & SCF_DO_SUBSTR) { /* XXXX Add !SUSPEND? */ |
| 5296 | /* Cannot merge strings after this. */ |
| 5297 | scan_commit(pRExC_state, data, minlenp, is_inf); |
| 5298 | } |
| 5299 | if (flags & SCF_DO_STCLASS) |
| 5300 | ssc_init_zero(pRExC_state, &accum); |
| 5301 | |
| 5302 | if (!trie->jump) { |
| 5303 | min1= trie->minlen; |
| 5304 | max1= trie->maxlen; |
| 5305 | } else { |
| 5306 | const regnode *nextbranch= NULL; |
| 5307 | U32 word; |
| 5308 | |
| 5309 | for ( word=1 ; word <= trie->wordcount ; word++) |
| 5310 | { |
| 5311 | SSize_t deltanext=0, minnext=0, f = 0, fake; |
| 5312 | regnode_ssc this_class; |
| 5313 | |
| 5314 | data_fake.flags = 0; |
| 5315 | if (data) { |
| 5316 | data_fake.whilem_c = data->whilem_c; |
| 5317 | data_fake.last_closep = data->last_closep; |
| 5318 | } |
| 5319 | else |
| 5320 | data_fake.last_closep = &fake; |
| 5321 | data_fake.pos_delta = delta; |
| 5322 | if (flags & SCF_DO_STCLASS) { |
| 5323 | ssc_init(pRExC_state, &this_class); |
| 5324 | data_fake.start_class = &this_class; |
| 5325 | f = SCF_DO_STCLASS_AND; |
| 5326 | } |
| 5327 | if (flags & SCF_WHILEM_VISITED_POS) |
| 5328 | f |= SCF_WHILEM_VISITED_POS; |
| 5329 | |
| 5330 | if (trie->jump[word]) { |
| 5331 | if (!nextbranch) |
| 5332 | nextbranch = trie_node + trie->jump[0]; |
| 5333 | scan= trie_node + trie->jump[word]; |
| 5334 | /* We go from the jump point to the branch that follows |
| 5335 | it. Note this means we need the vestigal unused |
| 5336 | branches even though they arent otherwise used. */ |
| 5337 | minnext = study_chunk(pRExC_state, &scan, minlenp, |
| 5338 | &deltanext, (regnode *)nextbranch, &data_fake, |
| 5339 | stopparen, recursed_depth, NULL, f,depth+1); |
| 5340 | } |
| 5341 | if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH) |
| 5342 | nextbranch= regnext((regnode*)nextbranch); |
| 5343 | |
| 5344 | if (min1 > (SSize_t)(minnext + trie->minlen)) |
| 5345 | min1 = minnext + trie->minlen; |
| 5346 | if (deltanext == SSize_t_MAX) { |
| 5347 | is_inf = is_inf_internal = 1; |
| 5348 | max1 = SSize_t_MAX; |
| 5349 | } else if (max1 < (SSize_t)(minnext + deltanext + trie->maxlen)) |
| 5350 | max1 = minnext + deltanext + trie->maxlen; |
| 5351 | |
| 5352 | if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) |
| 5353 | pars++; |
| 5354 | if (data_fake.flags & SCF_SEEN_ACCEPT) { |
| 5355 | if ( stopmin > min + min1) |
| 5356 | stopmin = min + min1; |
| 5357 | flags &= ~SCF_DO_SUBSTR; |
| 5358 | if (data) |
| 5359 | data->flags |= SCF_SEEN_ACCEPT; |
| 5360 | } |
| 5361 | if (data) { |
| 5362 | if (data_fake.flags & SF_HAS_EVAL) |
| 5363 | data->flags |= SF_HAS_EVAL; |
| 5364 | data->whilem_c = data_fake.whilem_c; |
| 5365 | } |
| 5366 | if (flags & SCF_DO_STCLASS) |
| 5367 | ssc_or(pRExC_state, &accum, (regnode_charclass *) &this_class); |
| 5368 | } |
| 5369 | } |
| 5370 | if (flags & SCF_DO_SUBSTR) { |
| 5371 | data->pos_min += min1; |
| 5372 | data->pos_delta += max1 - min1; |
| 5373 | if (max1 != min1 || is_inf) |
| 5374 | data->longest = &(data->longest_float); |
| 5375 | } |
| 5376 | min += min1; |
| 5377 | delta += max1 - min1; |
| 5378 | if (flags & SCF_DO_STCLASS_OR) { |
| 5379 | ssc_or(pRExC_state, data->start_class, (regnode_charclass *) &accum); |
| 5380 | if (min1) { |
| 5381 | ssc_and(pRExC_state, data->start_class, (regnode_charclass *) and_withp); |
| 5382 | flags &= ~SCF_DO_STCLASS; |
| 5383 | } |
| 5384 | } |
| 5385 | else if (flags & SCF_DO_STCLASS_AND) { |
| 5386 | if (min1) { |
| 5387 | ssc_and(pRExC_state, data->start_class, (regnode_charclass *) &accum); |
| 5388 | flags &= ~SCF_DO_STCLASS; |
| 5389 | } |
| 5390 | else { |
| 5391 | /* Switch to OR mode: cache the old value of |
| 5392 | * data->start_class */ |
| 5393 | INIT_AND_WITHP; |
| 5394 | StructCopy(data->start_class, and_withp, regnode_ssc); |
| 5395 | flags &= ~SCF_DO_STCLASS_AND; |
| 5396 | StructCopy(&accum, data->start_class, regnode_ssc); |
| 5397 | flags |= SCF_DO_STCLASS_OR; |
| 5398 | } |
| 5399 | } |
| 5400 | scan= tail; |
| 5401 | continue; |
| 5402 | } |
| 5403 | #else |
| 5404 | else if (PL_regkind[OP(scan)] == TRIE) { |
| 5405 | reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ]; |
| 5406 | U8*bang=NULL; |
| 5407 | |
| 5408 | min += trie->minlen; |
| 5409 | delta += (trie->maxlen - trie->minlen); |
| 5410 | flags &= ~SCF_DO_STCLASS; /* xxx */ |
| 5411 | if (flags & SCF_DO_SUBSTR) { |
| 5412 | /* Cannot expect anything... */ |
| 5413 | scan_commit(pRExC_state, data, minlenp, is_inf); |
| 5414 | data->pos_min += trie->minlen; |
| 5415 | data->pos_delta += (trie->maxlen - trie->minlen); |
| 5416 | if (trie->maxlen != trie->minlen) |
| 5417 | data->longest = &(data->longest_float); |
| 5418 | } |
| 5419 | if (trie->jump) /* no more substrings -- for now /grr*/ |
| 5420 | flags &= ~SCF_DO_SUBSTR; |
| 5421 | } |
| 5422 | #endif /* old or new */ |
| 5423 | #endif /* TRIE_STUDY_OPT */ |
| 5424 | |
| 5425 | /* Else: zero-length, ignore. */ |
| 5426 | scan = regnext(scan); |
| 5427 | } |
| 5428 | /* If we are exiting a recursion we can unset its recursed bit |
| 5429 | * and allow ourselves to enter it again - no danger of an |
| 5430 | * infinite loop there. |
| 5431 | if (stopparen > -1 && recursed) { |
| 5432 | DEBUG_STUDYDATA("unset:", data,depth); |
| 5433 | PAREN_UNSET( recursed, stopparen); |
| 5434 | } |
| 5435 | */ |
| 5436 | if (frame) { |
| 5437 | DEBUG_STUDYDATA("frame-end:",data,depth); |
| 5438 | DEBUG_PEEP("fend", scan, depth); |
| 5439 | /* restore previous context */ |
| 5440 | last = frame->last; |
| 5441 | scan = frame->next; |
| 5442 | stopparen = frame->stop; |
| 5443 | recursed_depth = frame->prev_recursed_depth; |
| 5444 | depth = depth - 1; |
| 5445 | |
| 5446 | frame = frame->prev; |
| 5447 | goto fake_study_recurse; |
| 5448 | } |
| 5449 | |
| 5450 | finish: |
| 5451 | assert(!frame); |
| 5452 | DEBUG_STUDYDATA("pre-fin:",data,depth); |
| 5453 | |
| 5454 | *scanp = scan; |
| 5455 | *deltap = is_inf_internal ? SSize_t_MAX : delta; |
| 5456 | |
| 5457 | if (flags & SCF_DO_SUBSTR && is_inf) |
| 5458 | data->pos_delta = SSize_t_MAX - data->pos_min; |
| 5459 | if (is_par > (I32)U8_MAX) |
| 5460 | is_par = 0; |
| 5461 | if (is_par && pars==1 && data) { |
| 5462 | data->flags |= SF_IN_PAR; |
| 5463 | data->flags &= ~SF_HAS_PAR; |
| 5464 | } |
| 5465 | else if (pars && data) { |
| 5466 | data->flags |= SF_HAS_PAR; |
| 5467 | data->flags &= ~SF_IN_PAR; |
| 5468 | } |
| 5469 | if (flags & SCF_DO_STCLASS_OR) |
| 5470 | ssc_and(pRExC_state, data->start_class, (regnode_charclass *) and_withp); |
| 5471 | if (flags & SCF_TRIE_RESTUDY) |
| 5472 | data->flags |= SCF_TRIE_RESTUDY; |
| 5473 | |
| 5474 | DEBUG_STUDYDATA("post-fin:",data,depth); |
| 5475 | |
| 5476 | { |
| 5477 | SSize_t final_minlen= min < stopmin ? min : stopmin; |
| 5478 | |
| 5479 | if (!(RExC_seen & REG_UNBOUNDED_QUANTIFIER_SEEN) && (RExC_maxlen < final_minlen + delta)) { |
| 5480 | RExC_maxlen = final_minlen + delta; |
| 5481 | } |
| 5482 | return final_minlen; |
| 5483 | } |
| 5484 | /* not-reached */ |
| 5485 | } |
| 5486 | |
| 5487 | STATIC U32 |
| 5488 | S_add_data(RExC_state_t* const pRExC_state, const char* const s, const U32 n) |
| 5489 | { |
| 5490 | U32 count = RExC_rxi->data ? RExC_rxi->data->count : 0; |
| 5491 | |
| 5492 | PERL_ARGS_ASSERT_ADD_DATA; |
| 5493 | |
| 5494 | Renewc(RExC_rxi->data, |
| 5495 | sizeof(*RExC_rxi->data) + sizeof(void*) * (count + n - 1), |
| 5496 | char, struct reg_data); |
| 5497 | if(count) |
| 5498 | Renew(RExC_rxi->data->what, count + n, U8); |
| 5499 | else |
| 5500 | Newx(RExC_rxi->data->what, n, U8); |
| 5501 | RExC_rxi->data->count = count + n; |
| 5502 | Copy(s, RExC_rxi->data->what + count, n, U8); |
| 5503 | return count; |
| 5504 | } |
| 5505 | |
| 5506 | /*XXX: todo make this not included in a non debugging perl, but appears to be |
| 5507 | * used anyway there, in 'use re' */ |
| 5508 | #ifndef PERL_IN_XSUB_RE |
| 5509 | void |
| 5510 | Perl_reginitcolors(pTHX) |
| 5511 | { |
| 5512 | const char * const s = PerlEnv_getenv("PERL_RE_COLORS"); |
| 5513 | if (s) { |
| 5514 | char *t = savepv(s); |
| 5515 | int i = 0; |
| 5516 | PL_colors[0] = t; |
| 5517 | while (++i < 6) { |
| 5518 | t = strchr(t, '\t'); |
| 5519 | if (t) { |
| 5520 | *t = '\0'; |
| 5521 | PL_colors[i] = ++t; |
| 5522 | } |
| 5523 | else |
| 5524 | PL_colors[i] = t = (char *)""; |
| 5525 | } |
| 5526 | } else { |
| 5527 | int i = 0; |
| 5528 | while (i < 6) |
| 5529 | PL_colors[i++] = (char *)""; |
| 5530 | } |
| 5531 | PL_colorset = 1; |
| 5532 | } |
| 5533 | #endif |
| 5534 | |
| 5535 | |
| 5536 | #ifdef TRIE_STUDY_OPT |
| 5537 | #define CHECK_RESTUDY_GOTO_butfirst(dOsomething) \ |
| 5538 | STMT_START { \ |
| 5539 | if ( \ |
| 5540 | (data.flags & SCF_TRIE_RESTUDY) \ |
| 5541 | && ! restudied++ \ |
| 5542 | ) { \ |
| 5543 | dOsomething; \ |
| 5544 | goto reStudy; \ |
| 5545 | } \ |
| 5546 | } STMT_END |
| 5547 | #else |
| 5548 | #define CHECK_RESTUDY_GOTO_butfirst |
| 5549 | #endif |
| 5550 | |
| 5551 | /* |
| 5552 | * pregcomp - compile a regular expression into internal code |
| 5553 | * |
| 5554 | * Decides which engine's compiler to call based on the hint currently in |
| 5555 | * scope |
| 5556 | */ |
| 5557 | |
| 5558 | #ifndef PERL_IN_XSUB_RE |
| 5559 | |
| 5560 | /* return the currently in-scope regex engine (or the default if none) */ |
| 5561 | |
| 5562 | regexp_engine const * |
| 5563 | Perl_current_re_engine(pTHX) |
| 5564 | { |
| 5565 | if (IN_PERL_COMPILETIME) { |
| 5566 | HV * const table = GvHV(PL_hintgv); |
| 5567 | SV **ptr; |
| 5568 | |
| 5569 | if (!table || !(PL_hints & HINT_LOCALIZE_HH)) |
| 5570 | return &PL_core_reg_engine; |
| 5571 | ptr = hv_fetchs(table, "regcomp", FALSE); |
| 5572 | if ( !(ptr && SvIOK(*ptr) && SvIV(*ptr))) |
| 5573 | return &PL_core_reg_engine; |
| 5574 | return INT2PTR(regexp_engine*,SvIV(*ptr)); |
| 5575 | } |
| 5576 | else { |
| 5577 | SV *ptr; |
| 5578 | if (!PL_curcop->cop_hints_hash) |
| 5579 | return &PL_core_reg_engine; |
| 5580 | ptr = cop_hints_fetch_pvs(PL_curcop, "regcomp", 0); |
| 5581 | if ( !(ptr && SvIOK(ptr) && SvIV(ptr))) |
| 5582 | return &PL_core_reg_engine; |
| 5583 | return INT2PTR(regexp_engine*,SvIV(ptr)); |
| 5584 | } |
| 5585 | } |
| 5586 | |
| 5587 | |
| 5588 | REGEXP * |
| 5589 | Perl_pregcomp(pTHX_ SV * const pattern, const U32 flags) |
| 5590 | { |
| 5591 | regexp_engine const *eng = current_re_engine(); |
| 5592 | GET_RE_DEBUG_FLAGS_DECL; |
| 5593 | |
| 5594 | PERL_ARGS_ASSERT_PREGCOMP; |
| 5595 | |
| 5596 | /* Dispatch a request to compile a regexp to correct regexp engine. */ |
| 5597 | DEBUG_COMPILE_r({ |
| 5598 | PerlIO_printf(Perl_debug_log, "Using engine %"UVxf"\n", |
| 5599 | PTR2UV(eng)); |
| 5600 | }); |
| 5601 | return CALLREGCOMP_ENG(eng, pattern, flags); |
| 5602 | } |
| 5603 | #endif |
| 5604 | |
| 5605 | /* public(ish) entry point for the perl core's own regex compiling code. |
| 5606 | * It's actually a wrapper for Perl_re_op_compile that only takes an SV |
| 5607 | * pattern rather than a list of OPs, and uses the internal engine rather |
| 5608 | * than the current one */ |
| 5609 | |
| 5610 | REGEXP * |
| 5611 | Perl_re_compile(pTHX_ SV * const pattern, U32 rx_flags) |
| 5612 | { |
| 5613 | SV *pat = pattern; /* defeat constness! */ |
| 5614 | PERL_ARGS_ASSERT_RE_COMPILE; |
| 5615 | return Perl_re_op_compile(aTHX_ &pat, 1, NULL, |
| 5616 | #ifdef PERL_IN_XSUB_RE |
| 5617 | &my_reg_engine, |
| 5618 | #else |
| 5619 | &PL_core_reg_engine, |
| 5620 | #endif |
| 5621 | NULL, NULL, rx_flags, 0); |
| 5622 | } |
| 5623 | |
| 5624 | |
| 5625 | /* upgrade pattern pat_p of length plen_p to UTF8, and if there are code |
| 5626 | * blocks, recalculate the indices. Update pat_p and plen_p in-place to |
| 5627 | * point to the realloced string and length. |
| 5628 | * |
| 5629 | * This is essentially a copy of Perl_bytes_to_utf8() with the code index |
| 5630 | * stuff added */ |
| 5631 | |
| 5632 | static void |
| 5633 | S_pat_upgrade_to_utf8(pTHX_ RExC_state_t * const pRExC_state, |
| 5634 | char **pat_p, STRLEN *plen_p, int num_code_blocks) |
| 5635 | { |
| 5636 | U8 *const src = (U8*)*pat_p; |
| 5637 | U8 *dst; |
| 5638 | int n=0; |
| 5639 | STRLEN s = 0, d = 0; |
| 5640 | bool do_end = 0; |
| 5641 | GET_RE_DEBUG_FLAGS_DECL; |
| 5642 | |
| 5643 | DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, |
| 5644 | "UTF8 mismatch! Converting to utf8 for resizing and compile\n")); |
| 5645 | |
| 5646 | Newx(dst, *plen_p * 2 + 1, U8); |
| 5647 | |
| 5648 | while (s < *plen_p) { |
| 5649 | if (NATIVE_BYTE_IS_INVARIANT(src[s])) |
| 5650 | dst[d] = src[s]; |
| 5651 | else { |
| 5652 | dst[d++] = UTF8_EIGHT_BIT_HI(src[s]); |
| 5653 | dst[d] = UTF8_EIGHT_BIT_LO(src[s]); |
| 5654 | } |
| 5655 | if (n < num_code_blocks) { |
| 5656 | if (!do_end && pRExC_state->code_blocks[n].start == s) { |
| 5657 | pRExC_state->code_blocks[n].start = d; |
| 5658 | assert(dst[d] == '('); |
| 5659 | do_end = 1; |
| 5660 | } |
| 5661 | else if (do_end && pRExC_state->code_blocks[n].end == s) { |
| 5662 | pRExC_state->code_blocks[n].end = d; |
| 5663 | assert(dst[d] == ')'); |
| 5664 | do_end = 0; |
| 5665 | n++; |
| 5666 | } |
| 5667 | } |
| 5668 | s++; |
| 5669 | d++; |
| 5670 | } |
| 5671 | dst[d] = '\0'; |
| 5672 | *plen_p = d; |
| 5673 | *pat_p = (char*) dst; |
| 5674 | SAVEFREEPV(*pat_p); |
| 5675 | RExC_orig_utf8 = RExC_utf8 = 1; |
| 5676 | } |
| 5677 | |
| 5678 | |
| 5679 | |
| 5680 | /* S_concat_pat(): concatenate a list of args to the pattern string pat, |
| 5681 | * while recording any code block indices, and handling overloading, |
| 5682 | * nested qr// objects etc. If pat is null, it will allocate a new |
| 5683 | * string, or just return the first arg, if there's only one. |
| 5684 | * |
| 5685 | * Returns the malloced/updated pat. |
| 5686 | * patternp and pat_count is the array of SVs to be concatted; |
| 5687 | * oplist is the optional list of ops that generated the SVs; |
| 5688 | * recompile_p is a pointer to a boolean that will be set if |
| 5689 | * the regex will need to be recompiled. |
| 5690 | * delim, if non-null is an SV that will be inserted between each element |
| 5691 | */ |
| 5692 | |
| 5693 | static SV* |
| 5694 | S_concat_pat(pTHX_ RExC_state_t * const pRExC_state, |
| 5695 | SV *pat, SV ** const patternp, int pat_count, |
| 5696 | OP *oplist, bool *recompile_p, SV *delim) |
| 5697 | { |
| 5698 | SV **svp; |
| 5699 | int n = 0; |
| 5700 | bool use_delim = FALSE; |
| 5701 | bool alloced = FALSE; |
| 5702 | |
| 5703 | /* if we know we have at least two args, create an empty string, |
| 5704 | * then concatenate args to that. For no args, return an empty string */ |
| 5705 | if (!pat && pat_count != 1) { |
| 5706 | pat = newSVpvs(""); |
| 5707 | SAVEFREESV(pat); |
| 5708 | alloced = TRUE; |
| 5709 | } |
| 5710 | |
| 5711 | for (svp = patternp; svp < patternp + pat_count; svp++) { |
| 5712 | SV *sv; |
| 5713 | SV *rx = NULL; |
| 5714 | STRLEN orig_patlen = 0; |
| 5715 | bool code = 0; |
| 5716 | SV *msv = use_delim ? delim : *svp; |
| 5717 | if (!msv) msv = &PL_sv_undef; |
| 5718 | |
| 5719 | /* if we've got a delimiter, we go round the loop twice for each |
| 5720 | * svp slot (except the last), using the delimiter the second |
| 5721 | * time round */ |
| 5722 | if (use_delim) { |
| 5723 | svp--; |
| 5724 | use_delim = FALSE; |
| 5725 | } |
| 5726 | else if (delim) |
| 5727 | use_delim = TRUE; |
| 5728 | |
| 5729 | if (SvTYPE(msv) == SVt_PVAV) { |
| 5730 | /* we've encountered an interpolated array within |
| 5731 | * the pattern, e.g. /...@a..../. Expand the list of elements, |
| 5732 | * then recursively append elements. |
| 5733 | * The code in this block is based on S_pushav() */ |
| 5734 | |
| 5735 | AV *const av = (AV*)msv; |
| 5736 | const SSize_t maxarg = AvFILL(av) + 1; |
| 5737 | SV **array; |
| 5738 | |
| 5739 | if (oplist) { |
| 5740 | assert(oplist->op_type == OP_PADAV |
| 5741 | || oplist->op_type == OP_RV2AV); |
| 5742 | oplist = OP_SIBLING(oplist); |
| 5743 | } |
| 5744 | |
| 5745 | if (SvRMAGICAL(av)) { |
| 5746 | SSize_t i; |
| 5747 | |
| 5748 | Newx(array, maxarg, SV*); |
| 5749 | SAVEFREEPV(array); |
| 5750 | for (i=0; i < maxarg; i++) { |
| 5751 | SV ** const svp = av_fetch(av, i, FALSE); |
| 5752 | array[i] = svp ? *svp : &PL_sv_undef; |
| 5753 | } |
| 5754 | } |
| 5755 | else |
| 5756 | array = AvARRAY(av); |
| 5757 | |
| 5758 | pat = S_concat_pat(aTHX_ pRExC_state, pat, |
| 5759 | array, maxarg, NULL, recompile_p, |
| 5760 | /* $" */ |
| 5761 | GvSV((gv_fetchpvs("\"", GV_ADDMULTI, SVt_PV)))); |
| 5762 | |
| 5763 | continue; |
| 5764 | } |
| 5765 | |
| 5766 | |
| 5767 | /* we make the assumption here that each op in the list of |
| 5768 | * op_siblings maps to one SV pushed onto the stack, |
| 5769 | * except for code blocks, with have both an OP_NULL and |
| 5770 | * and OP_CONST. |
| 5771 | * This allows us to match up the list of SVs against the |
| 5772 | * list of OPs to find the next code block. |
| 5773 | * |
| 5774 | * Note that PUSHMARK PADSV PADSV .. |
| 5775 | * is optimised to |
| 5776 | * PADRANGE PADSV PADSV .. |
| 5777 | * so the alignment still works. */ |
| 5778 | |
| 5779 | if (oplist) { |
| 5780 | if (oplist->op_type == OP_NULL |
| 5781 | && (oplist->op_flags & OPf_SPECIAL)) |
| 5782 | { |
| 5783 | assert(n < pRExC_state->num_code_blocks); |
| 5784 | pRExC_state->code_blocks[n].start = pat ? SvCUR(pat) : 0; |
| 5785 | pRExC_state->code_blocks[n].block = oplist; |
| 5786 | pRExC_state->code_blocks[n].src_regex = NULL; |
| 5787 | n++; |
| 5788 | code = 1; |
| 5789 | oplist = OP_SIBLING(oplist); /* skip CONST */ |
| 5790 | assert(oplist); |
| 5791 | } |
| 5792 | oplist = OP_SIBLING(oplist);; |
| 5793 | } |
| 5794 | |
| 5795 | /* apply magic and QR overloading to arg */ |
| 5796 | |
| 5797 | SvGETMAGIC(msv); |
| 5798 | if (SvROK(msv) && SvAMAGIC(msv)) { |
| 5799 | SV *sv = AMG_CALLunary(msv, regexp_amg); |
| 5800 | if (sv) { |
| 5801 | if (SvROK(sv)) |
| 5802 | sv = SvRV(sv); |
| 5803 | if (SvTYPE(sv) != SVt_REGEXP) |
| 5804 | Perl_croak(aTHX_ "Overloaded qr did not return a REGEXP"); |
| 5805 | msv = sv; |
| 5806 | } |
| 5807 | } |
| 5808 | |
| 5809 | /* try concatenation overload ... */ |
| 5810 | if (pat && (SvAMAGIC(pat) || SvAMAGIC(msv)) && |
| 5811 | (sv = amagic_call(pat, msv, concat_amg, AMGf_assign))) |
| 5812 | { |
| 5813 | sv_setsv(pat, sv); |
| 5814 | /* overloading involved: all bets are off over literal |
| 5815 | * code. Pretend we haven't seen it */ |
| 5816 | pRExC_state->num_code_blocks -= n; |
| 5817 | n = 0; |
| 5818 | } |
| 5819 | else { |
| 5820 | /* ... or failing that, try "" overload */ |
| 5821 | while (SvAMAGIC(msv) |
| 5822 | && (sv = AMG_CALLunary(msv, string_amg)) |
| 5823 | && sv != msv |
| 5824 | && !( SvROK(msv) |
| 5825 | && SvROK(sv) |
| 5826 | && SvRV(msv) == SvRV(sv)) |
| 5827 | ) { |
| 5828 | msv = sv; |
| 5829 | SvGETMAGIC(msv); |
| 5830 | } |
| 5831 | if (SvROK(msv) && SvTYPE(SvRV(msv)) == SVt_REGEXP) |
| 5832 | msv = SvRV(msv); |
| 5833 | |
| 5834 | if (pat) { |
| 5835 | /* this is a partially unrolled |
| 5836 | * sv_catsv_nomg(pat, msv); |
| 5837 | * that allows us to adjust code block indices if |
| 5838 | * needed */ |
| 5839 | STRLEN dlen; |
| 5840 | char *dst = SvPV_force_nomg(pat, dlen); |
| 5841 | orig_patlen = dlen; |
| 5842 | if (SvUTF8(msv) && !SvUTF8(pat)) { |
| 5843 | S_pat_upgrade_to_utf8(aTHX_ pRExC_state, &dst, &dlen, n); |
| 5844 | sv_setpvn(pat, dst, dlen); |
| 5845 | SvUTF8_on(pat); |
| 5846 | } |
| 5847 | sv_catsv_nomg(pat, msv); |
| 5848 | rx = msv; |
| 5849 | } |
| 5850 | else |
| 5851 | pat = msv; |
| 5852 | |
| 5853 | if (code) |
| 5854 | pRExC_state->code_blocks[n-1].end = SvCUR(pat)-1; |
| 5855 | } |
| 5856 | |
| 5857 | /* extract any code blocks within any embedded qr//'s */ |
| 5858 | if (rx && SvTYPE(rx) == SVt_REGEXP |
| 5859 | && RX_ENGINE((REGEXP*)rx)->op_comp) |
| 5860 | { |
| 5861 | |
| 5862 | RXi_GET_DECL(ReANY((REGEXP *)rx), ri); |
| 5863 | if (ri->num_code_blocks) { |
| 5864 | int i; |
| 5865 | /* the presence of an embedded qr// with code means |
| 5866 | * we should always recompile: the text of the |
| 5867 | * qr// may not have changed, but it may be a |
| 5868 | * different closure than last time */ |
| 5869 | *recompile_p = 1; |
| 5870 | Renew(pRExC_state->code_blocks, |
| 5871 | pRExC_state->num_code_blocks + ri->num_code_blocks, |
| 5872 | struct reg_code_block); |
| 5873 | pRExC_state->num_code_blocks += ri->num_code_blocks; |
| 5874 | |
| 5875 | for (i=0; i < ri->num_code_blocks; i++) { |
| 5876 | struct reg_code_block *src, *dst; |
| 5877 | STRLEN offset = orig_patlen |
| 5878 | + ReANY((REGEXP *)rx)->pre_prefix; |
| 5879 | assert(n < pRExC_state->num_code_blocks); |
| 5880 | src = &ri->code_blocks[i]; |
| 5881 | dst = &pRExC_state->code_blocks[n]; |
| 5882 | dst->start = src->start + offset; |
| 5883 | dst->end = src->end + offset; |
| 5884 | dst->block = src->block; |
| 5885 | dst->src_regex = (REGEXP*) SvREFCNT_inc( (SV*) |
| 5886 | src->src_regex |
| 5887 | ? src->src_regex |
| 5888 | : (REGEXP*)rx); |
| 5889 | n++; |
| 5890 | } |
| 5891 | } |
| 5892 | } |
| 5893 | } |
| 5894 | /* avoid calling magic multiple times on a single element e.g. =~ $qr */ |
| 5895 | if (alloced) |
| 5896 | SvSETMAGIC(pat); |
| 5897 | |
| 5898 | return pat; |
| 5899 | } |
| 5900 | |
| 5901 | |
| 5902 | |
| 5903 | /* see if there are any run-time code blocks in the pattern. |
| 5904 | * False positives are allowed */ |
| 5905 | |
| 5906 | static bool |
| 5907 | S_has_runtime_code(pTHX_ RExC_state_t * const pRExC_state, |
| 5908 | char *pat, STRLEN plen) |
| 5909 | { |
| 5910 | int n = 0; |
| 5911 | STRLEN s; |
| 5912 | |
| 5913 | PERL_UNUSED_CONTEXT; |
| 5914 | |
| 5915 | for (s = 0; s < plen; s++) { |
| 5916 | if (n < pRExC_state->num_code_blocks |
| 5917 | && s == pRExC_state->code_blocks[n].start) |
| 5918 | { |
| 5919 | s = pRExC_state->code_blocks[n].end; |
| 5920 | n++; |
| 5921 | continue; |
| 5922 | } |
| 5923 | /* TODO ideally should handle [..], (#..), /#.../x to reduce false |
| 5924 | * positives here */ |
| 5925 | if (pat[s] == '(' && s+2 <= plen && pat[s+1] == '?' && |
| 5926 | (pat[s+2] == '{' |
| 5927 | || (s + 2 <= plen && pat[s+2] == '?' && pat[s+3] == '{')) |
| 5928 | ) |
| 5929 | return 1; |
| 5930 | } |
| 5931 | return 0; |
| 5932 | } |
| 5933 | |
| 5934 | /* Handle run-time code blocks. We will already have compiled any direct |
| 5935 | * or indirect literal code blocks. Now, take the pattern 'pat' and make a |
| 5936 | * copy of it, but with any literal code blocks blanked out and |
| 5937 | * appropriate chars escaped; then feed it into |
| 5938 | * |
| 5939 | * eval "qr'modified_pattern'" |
| 5940 | * |
| 5941 | * For example, |
| 5942 | * |
| 5943 | * a\bc(?{"this was literal"})def'ghi\\jkl(?{"this is runtime"})mno |
| 5944 | * |
| 5945 | * becomes |
| 5946 | * |
| 5947 | * qr'a\\bc_______________________def\'ghi\\\\jkl(?{"this is runtime"})mno' |
| 5948 | * |
| 5949 | * After eval_sv()-ing that, grab any new code blocks from the returned qr |
| 5950 | * and merge them with any code blocks of the original regexp. |
| 5951 | * |
| 5952 | * If the pat is non-UTF8, while the evalled qr is UTF8, don't merge; |
| 5953 | * instead, just save the qr and return FALSE; this tells our caller that |
| 5954 | * the original pattern needs upgrading to utf8. |
| 5955 | */ |
| 5956 | |
| 5957 | static bool |
| 5958 | S_compile_runtime_code(pTHX_ RExC_state_t * const pRExC_state, |
| 5959 | char *pat, STRLEN plen) |
| 5960 | { |
| 5961 | SV *qr; |
| 5962 | |
| 5963 | GET_RE_DEBUG_FLAGS_DECL; |
| 5964 | |
| 5965 | if (pRExC_state->runtime_code_qr) { |
| 5966 | /* this is the second time we've been called; this should |
| 5967 | * only happen if the main pattern got upgraded to utf8 |
| 5968 | * during compilation; re-use the qr we compiled first time |
| 5969 | * round (which should be utf8 too) |
| 5970 | */ |
| 5971 | qr = pRExC_state->runtime_code_qr; |
| 5972 | pRExC_state->runtime_code_qr = NULL; |
| 5973 | assert(RExC_utf8 && SvUTF8(qr)); |
| 5974 | } |
| 5975 | else { |
| 5976 | int n = 0; |
| 5977 | STRLEN s; |
| 5978 | char *p, *newpat; |
| 5979 | int newlen = plen + 6; /* allow for "qr''x\0" extra chars */ |
| 5980 | SV *sv, *qr_ref; |
| 5981 | dSP; |
| 5982 | |
| 5983 | /* determine how many extra chars we need for ' and \ escaping */ |
| 5984 | for (s = 0; s < plen; s++) { |
| 5985 | if (pat[s] == '\'' || pat[s] == '\\') |
| 5986 | newlen++; |
| 5987 | } |
| 5988 | |
| 5989 | Newx(newpat, newlen, char); |
| 5990 | p = newpat; |
| 5991 | *p++ = 'q'; *p++ = 'r'; *p++ = '\''; |
| 5992 | |
| 5993 | for (s = 0; s < plen; s++) { |
| 5994 | if (n < pRExC_state->num_code_blocks |
| 5995 | && s == pRExC_state->code_blocks[n].start) |
| 5996 | { |
| 5997 | /* blank out literal code block */ |
| 5998 | assert(pat[s] == '('); |
| 5999 | while (s <= pRExC_state->code_blocks[n].end) { |
| 6000 | *p++ = '_'; |
| 6001 | s++; |
| 6002 | } |
| 6003 | s--; |
| 6004 | n++; |
| 6005 | continue; |
| 6006 | } |
| 6007 | if (pat[s] == '\'' || pat[s] == '\\') |
| 6008 | *p++ = '\\'; |
| 6009 | *p++ = pat[s]; |
| 6010 | } |
| 6011 | *p++ = '\''; |
| 6012 | if (pRExC_state->pm_flags & RXf_PMf_EXTENDED) |
| 6013 | *p++ = 'x'; |
| 6014 | *p++ = '\0'; |
| 6015 | DEBUG_COMPILE_r({ |
| 6016 | PerlIO_printf(Perl_debug_log, |
| 6017 | "%sre-parsing pattern for runtime code:%s %s\n", |
| 6018 | PL_colors[4],PL_colors[5],newpat); |
| 6019 | }); |
| 6020 | |
| 6021 | sv = newSVpvn_flags(newpat, p-newpat-1, RExC_utf8 ? SVf_UTF8 : 0); |
| 6022 | Safefree(newpat); |
| 6023 | |
| 6024 | ENTER; |
| 6025 | SAVETMPS; |
| 6026 | save_re_context(); |
| 6027 | PUSHSTACKi(PERLSI_REQUIRE); |
| 6028 | /* G_RE_REPARSING causes the toker to collapse \\ into \ when |
| 6029 | * parsing qr''; normally only q'' does this. It also alters |
| 6030 | * hints handling */ |
| 6031 | eval_sv(sv, G_SCALAR|G_RE_REPARSING); |
| 6032 | SvREFCNT_dec_NN(sv); |
| 6033 | SPAGAIN; |
| 6034 | qr_ref = POPs; |
| 6035 | PUTBACK; |
| 6036 | { |
| 6037 | SV * const errsv = ERRSV; |
| 6038 | if (SvTRUE_NN(errsv)) |
| 6039 | { |
| 6040 | Safefree(pRExC_state->code_blocks); |
| 6041 | /* use croak_sv ? */ |
| 6042 | Perl_croak_nocontext("%"SVf, SVfARG(errsv)); |
| 6043 | } |
| 6044 | } |
| 6045 | assert(SvROK(qr_ref)); |
| 6046 | qr = SvRV(qr_ref); |
| 6047 | assert(SvTYPE(qr) == SVt_REGEXP && RX_ENGINE((REGEXP*)qr)->op_comp); |
| 6048 | /* the leaving below frees the tmp qr_ref. |
| 6049 | * Give qr a life of its own */ |
| 6050 | SvREFCNT_inc(qr); |
| 6051 | POPSTACK; |
| 6052 | FREETMPS; |
| 6053 | LEAVE; |
| 6054 | |
| 6055 | } |
| 6056 | |
| 6057 | if (!RExC_utf8 && SvUTF8(qr)) { |
| 6058 | /* first time through; the pattern got upgraded; save the |
| 6059 | * qr for the next time through */ |
| 6060 | assert(!pRExC_state->runtime_code_qr); |
| 6061 | pRExC_state->runtime_code_qr = qr; |
| 6062 | return 0; |
| 6063 | } |
| 6064 | |
| 6065 | |
| 6066 | /* extract any code blocks within the returned qr// */ |
| 6067 | |
| 6068 | |
| 6069 | /* merge the main (r1) and run-time (r2) code blocks into one */ |
| 6070 | { |
| 6071 | RXi_GET_DECL(ReANY((REGEXP *)qr), r2); |
| 6072 | struct reg_code_block *new_block, *dst; |
| 6073 | RExC_state_t * const r1 = pRExC_state; /* convenient alias */ |
| 6074 | int i1 = 0, i2 = 0; |
| 6075 | |
| 6076 | if (!r2->num_code_blocks) /* we guessed wrong */ |
| 6077 | { |
| 6078 | SvREFCNT_dec_NN(qr); |
| 6079 | return 1; |
| 6080 | } |
| 6081 | |
| 6082 | Newx(new_block, |
| 6083 | r1->num_code_blocks + r2->num_code_blocks, |
| 6084 | struct reg_code_block); |
| 6085 | dst = new_block; |
| 6086 | |
| 6087 | while ( i1 < r1->num_code_blocks |
| 6088 | || i2 < r2->num_code_blocks) |
| 6089 | { |
| 6090 | struct reg_code_block *src; |
| 6091 | bool is_qr = 0; |
| 6092 | |
| 6093 | if (i1 == r1->num_code_blocks) { |
| 6094 | src = &r2->code_blocks[i2++]; |
| 6095 | is_qr = 1; |
| 6096 | } |
| 6097 | else if (i2 == r2->num_code_blocks) |
| 6098 | src = &r1->code_blocks[i1++]; |
| 6099 | else if ( r1->code_blocks[i1].start |
| 6100 | < r2->code_blocks[i2].start) |
| 6101 | { |
| 6102 | src = &r1->code_blocks[i1++]; |
| 6103 | assert(src->end < r2->code_blocks[i2].start); |
| 6104 | } |
| 6105 | else { |
| 6106 | assert( r1->code_blocks[i1].start |
| 6107 | > r2->code_blocks[i2].start); |
| 6108 | src = &r2->code_blocks[i2++]; |
| 6109 | is_qr = 1; |
| 6110 | assert(src->end < r1->code_blocks[i1].start); |
| 6111 | } |
| 6112 | |
| 6113 | assert(pat[src->start] == '('); |
| 6114 | assert(pat[src->end] == ')'); |
| 6115 | dst->start = src->start; |
| 6116 | dst->end = src->end; |
| 6117 | dst->block = src->block; |
| 6118 | dst->src_regex = is_qr ? (REGEXP*) SvREFCNT_inc( (SV*) qr) |
| 6119 | : src->src_regex; |
| 6120 | dst++; |
| 6121 | } |
| 6122 | r1->num_code_blocks += r2->num_code_blocks; |
| 6123 | Safefree(r1->code_blocks); |
| 6124 | r1->code_blocks = new_block; |
| 6125 | } |
| 6126 | |
| 6127 | SvREFCNT_dec_NN(qr); |
| 6128 | return 1; |
| 6129 | } |
| 6130 | |
| 6131 | |
| 6132 | STATIC bool |
| 6133 | S_setup_longest(pTHX_ RExC_state_t *pRExC_state, SV* sv_longest, |
| 6134 | SV** rx_utf8, SV** rx_substr, SSize_t* rx_end_shift, |
| 6135 | SSize_t lookbehind, SSize_t offset, SSize_t *minlen, |
| 6136 | STRLEN longest_length, bool eol, bool meol) |
| 6137 | { |
| 6138 | /* This is the common code for setting up the floating and fixed length |
| 6139 | * string data extracted from Perl_re_op_compile() below. Returns a boolean |
| 6140 | * as to whether succeeded or not */ |
| 6141 | |
| 6142 | I32 t; |
| 6143 | SSize_t ml; |
| 6144 | |
| 6145 | if (! (longest_length |
| 6146 | || (eol /* Can't have SEOL and MULTI */ |
| 6147 | && (! meol || (RExC_flags & RXf_PMf_MULTILINE))) |
| 6148 | ) |
| 6149 | /* See comments for join_exact for why REG_UNFOLDED_MULTI_SEEN */ |
| 6150 | || (RExC_seen & REG_UNFOLDED_MULTI_SEEN)) |
| 6151 | { |
| 6152 | return FALSE; |
| 6153 | } |
| 6154 | |
| 6155 | /* copy the information about the longest from the reg_scan_data |
| 6156 | over to the program. */ |
| 6157 | if (SvUTF8(sv_longest)) { |
| 6158 | *rx_utf8 = sv_longest; |
| 6159 | *rx_substr = NULL; |
| 6160 | } else { |
| 6161 | *rx_substr = sv_longest; |
| 6162 | *rx_utf8 = NULL; |
| 6163 | } |
| 6164 | /* end_shift is how many chars that must be matched that |
| 6165 | follow this item. We calculate it ahead of time as once the |
| 6166 | lookbehind offset is added in we lose the ability to correctly |
| 6167 | calculate it.*/ |
| 6168 | ml = minlen ? *(minlen) : (SSize_t)longest_length; |
| 6169 | *rx_end_shift = ml - offset |
| 6170 | - longest_length + (SvTAIL(sv_longest) != 0) |
| 6171 | + lookbehind; |
| 6172 | |
| 6173 | t = (eol/* Can't have SEOL and MULTI */ |
| 6174 | && (! meol || (RExC_flags & RXf_PMf_MULTILINE))); |
| 6175 | fbm_compile(sv_longest, t ? FBMcf_TAIL : 0); |
| 6176 | |
| 6177 | return TRUE; |
| 6178 | } |
| 6179 | |
| 6180 | /* |
| 6181 | * Perl_re_op_compile - the perl internal RE engine's function to compile a |
| 6182 | * regular expression into internal code. |
| 6183 | * The pattern may be passed either as: |
| 6184 | * a list of SVs (patternp plus pat_count) |
| 6185 | * a list of OPs (expr) |
| 6186 | * If both are passed, the SV list is used, but the OP list indicates |
| 6187 | * which SVs are actually pre-compiled code blocks |
| 6188 | * |
| 6189 | * The SVs in the list have magic and qr overloading applied to them (and |
| 6190 | * the list may be modified in-place with replacement SVs in the latter |
| 6191 | * case). |
| 6192 | * |
| 6193 | * If the pattern hasn't changed from old_re, then old_re will be |
| 6194 | * returned. |
| 6195 | * |
| 6196 | * eng is the current engine. If that engine has an op_comp method, then |
| 6197 | * handle directly (i.e. we assume that op_comp was us); otherwise, just |
| 6198 | * do the initial concatenation of arguments and pass on to the external |
| 6199 | * engine. |
| 6200 | * |
| 6201 | * If is_bare_re is not null, set it to a boolean indicating whether the |
| 6202 | * arg list reduced (after overloading) to a single bare regex which has |
| 6203 | * been returned (i.e. /$qr/). |
| 6204 | * |
| 6205 | * orig_rx_flags contains RXf_* flags. See perlreapi.pod for more details. |
| 6206 | * |
| 6207 | * pm_flags contains the PMf_* flags, typically based on those from the |
| 6208 | * pm_flags field of the related PMOP. Currently we're only interested in |
| 6209 | * PMf_HAS_CV, PMf_IS_QR, PMf_USE_RE_EVAL. |
| 6210 | * |
| 6211 | * We can't allocate space until we know how big the compiled form will be, |
| 6212 | * but we can't compile it (and thus know how big it is) until we've got a |
| 6213 | * place to put the code. So we cheat: we compile it twice, once with code |
| 6214 | * generation turned off and size counting turned on, and once "for real". |
| 6215 | * This also means that we don't allocate space until we are sure that the |
| 6216 | * thing really will compile successfully, and we never have to move the |
| 6217 | * code and thus invalidate pointers into it. (Note that it has to be in |
| 6218 | * one piece because free() must be able to free it all.) [NB: not true in perl] |
| 6219 | * |
| 6220 | * Beware that the optimization-preparation code in here knows about some |
| 6221 | * of the structure of the compiled regexp. [I'll say.] |
| 6222 | */ |
| 6223 | |
| 6224 | REGEXP * |
| 6225 | Perl_re_op_compile(pTHX_ SV ** const patternp, int pat_count, |
| 6226 | OP *expr, const regexp_engine* eng, REGEXP *old_re, |
| 6227 | bool *is_bare_re, U32 orig_rx_flags, U32 pm_flags) |
| 6228 | { |
| 6229 | REGEXP *rx; |
| 6230 | struct regexp *r; |
| 6231 | regexp_internal *ri; |
| 6232 | STRLEN plen; |
| 6233 | char *exp; |
| 6234 | regnode *scan; |
| 6235 | I32 flags; |
| 6236 | SSize_t minlen = 0; |
| 6237 | U32 rx_flags; |
| 6238 | SV *pat; |
| 6239 | SV *code_blocksv = NULL; |
| 6240 | SV** new_patternp = patternp; |
| 6241 | |
| 6242 | /* these are all flags - maybe they should be turned |
| 6243 | * into a single int with different bit masks */ |
| 6244 | I32 sawlookahead = 0; |
| 6245 | I32 sawplus = 0; |
| 6246 | I32 sawopen = 0; |
| 6247 | I32 sawminmod = 0; |
| 6248 | |
| 6249 | regex_charset initial_charset = get_regex_charset(orig_rx_flags); |
| 6250 | bool recompile = 0; |
| 6251 | bool runtime_code = 0; |
| 6252 | scan_data_t data; |
| 6253 | RExC_state_t RExC_state; |
| 6254 | RExC_state_t * const pRExC_state = &RExC_state; |
| 6255 | #ifdef TRIE_STUDY_OPT |
| 6256 | int restudied = 0; |
| 6257 | RExC_state_t copyRExC_state; |
| 6258 | #endif |
| 6259 | GET_RE_DEBUG_FLAGS_DECL; |
| 6260 | |
| 6261 | PERL_ARGS_ASSERT_RE_OP_COMPILE; |
| 6262 | |
| 6263 | DEBUG_r(if (!PL_colorset) reginitcolors()); |
| 6264 | |
| 6265 | #ifndef PERL_IN_XSUB_RE |
| 6266 | /* Initialize these here instead of as-needed, as is quick and avoids |
| 6267 | * having to test them each time otherwise */ |
| 6268 | if (! PL_AboveLatin1) { |
| 6269 | PL_AboveLatin1 = _new_invlist_C_array(AboveLatin1_invlist); |
| 6270 | PL_Latin1 = _new_invlist_C_array(Latin1_invlist); |
| 6271 | PL_UpperLatin1 = _new_invlist_C_array(UpperLatin1_invlist); |
| 6272 | PL_utf8_foldable = _new_invlist_C_array(_Perl_Any_Folds_invlist); |
| 6273 | PL_HasMultiCharFold = |
| 6274 | _new_invlist_C_array(_Perl_Folds_To_Multi_Char_invlist); |
| 6275 | } |
| 6276 | #endif |
| 6277 | |
| 6278 | pRExC_state->code_blocks = NULL; |
| 6279 | pRExC_state->num_code_blocks = 0; |
| 6280 | |
| 6281 | if (is_bare_re) |
| 6282 | *is_bare_re = FALSE; |
| 6283 | |
| 6284 | if (expr && (expr->op_type == OP_LIST || |
| 6285 | (expr->op_type == OP_NULL && expr->op_targ == OP_LIST))) { |
| 6286 | /* allocate code_blocks if needed */ |
| 6287 | OP *o; |
| 6288 | int ncode = 0; |
| 6289 | |
| 6290 | for (o = cLISTOPx(expr)->op_first; o; o = OP_SIBLING(o)) |
| 6291 | if (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)) |
| 6292 | ncode++; /* count of DO blocks */ |
| 6293 | if (ncode) { |
| 6294 | pRExC_state->num_code_blocks = ncode; |
| 6295 | Newx(pRExC_state->code_blocks, ncode, struct reg_code_block); |
| 6296 | } |
| 6297 | } |
| 6298 | |
| 6299 | if (!pat_count) { |
| 6300 | /* compile-time pattern with just OP_CONSTs and DO blocks */ |
| 6301 | |
| 6302 | int n; |
| 6303 | OP *o; |
| 6304 | |
| 6305 | /* find how many CONSTs there are */ |
| 6306 | assert(expr); |
| 6307 | n = 0; |
| 6308 | if (expr->op_type == OP_CONST) |
| 6309 | n = 1; |
| 6310 | else |
| 6311 | for (o = cLISTOPx(expr)->op_first; o; o = OP_SIBLING(o)) { |
| 6312 | if (o->op_type == OP_CONST) |
| 6313 | n++; |
| 6314 | } |
| 6315 | |
| 6316 | /* fake up an SV array */ |
| 6317 | |
| 6318 | assert(!new_patternp); |
| 6319 | Newx(new_patternp, n, SV*); |
| 6320 | SAVEFREEPV(new_patternp); |
| 6321 | pat_count = n; |
| 6322 | |
| 6323 | n = 0; |
| 6324 | if (expr->op_type == OP_CONST) |
| 6325 | new_patternp[n] = cSVOPx_sv(expr); |
| 6326 | else |
| 6327 | for (o = cLISTOPx(expr)->op_first; o; o = OP_SIBLING(o)) { |
| 6328 | if (o->op_type == OP_CONST) |
| 6329 | new_patternp[n++] = cSVOPo_sv; |
| 6330 | } |
| 6331 | |
| 6332 | } |
| 6333 | |
| 6334 | DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, |
| 6335 | "Assembling pattern from %d elements%s\n", pat_count, |
| 6336 | orig_rx_flags & RXf_SPLIT ? " for split" : "")); |
| 6337 | |
| 6338 | /* set expr to the first arg op */ |
| 6339 | |
| 6340 | if (pRExC_state->num_code_blocks |
| 6341 | && expr->op_type != OP_CONST) |
| 6342 | { |
| 6343 | expr = cLISTOPx(expr)->op_first; |
| 6344 | assert( expr->op_type == OP_PUSHMARK |
| 6345 | || (expr->op_type == OP_NULL && expr->op_targ == OP_PUSHMARK) |
| 6346 | || expr->op_type == OP_PADRANGE); |
| 6347 | expr = OP_SIBLING(expr); |
| 6348 | } |
| 6349 | |
| 6350 | pat = S_concat_pat(aTHX_ pRExC_state, NULL, new_patternp, pat_count, |
| 6351 | expr, &recompile, NULL); |
| 6352 | |
| 6353 | /* handle bare (possibly after overloading) regex: foo =~ $re */ |
| 6354 | { |
| 6355 | SV *re = pat; |
| 6356 | if (SvROK(re)) |
| 6357 | re = SvRV(re); |
| 6358 | if (SvTYPE(re) == SVt_REGEXP) { |
| 6359 | if (is_bare_re) |
| 6360 | *is_bare_re = TRUE; |
| 6361 | SvREFCNT_inc(re); |
| 6362 | Safefree(pRExC_state->code_blocks); |
| 6363 | DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, |
| 6364 | "Precompiled pattern%s\n", |
| 6365 | orig_rx_flags & RXf_SPLIT ? " for split" : "")); |
| 6366 | |
| 6367 | return (REGEXP*)re; |
| 6368 | } |
| 6369 | } |
| 6370 | |
| 6371 | exp = SvPV_nomg(pat, plen); |
| 6372 | |
| 6373 | if (!eng->op_comp) { |
| 6374 | if ((SvUTF8(pat) && IN_BYTES) |
| 6375 | || SvGMAGICAL(pat) || SvAMAGIC(pat)) |
| 6376 | { |
| 6377 | /* make a temporary copy; either to convert to bytes, |
| 6378 | * or to avoid repeating get-magic / overloaded stringify */ |
| 6379 | pat = newSVpvn_flags(exp, plen, SVs_TEMP | |
| 6380 | (IN_BYTES ? 0 : SvUTF8(pat))); |
| 6381 | } |
| 6382 | Safefree(pRExC_state->code_blocks); |
| 6383 | return CALLREGCOMP_ENG(eng, pat, orig_rx_flags); |
| 6384 | } |
| 6385 | |
| 6386 | /* ignore the utf8ness if the pattern is 0 length */ |
| 6387 | RExC_utf8 = RExC_orig_utf8 = (plen == 0 || IN_BYTES) ? 0 : SvUTF8(pat); |
| 6388 | RExC_uni_semantics = 0; |
| 6389 | RExC_contains_locale = 0; |
| 6390 | RExC_contains_i = 0; |
| 6391 | pRExC_state->runtime_code_qr = NULL; |
| 6392 | |
| 6393 | DEBUG_COMPILE_r({ |
| 6394 | SV *dsv= sv_newmortal(); |
| 6395 | RE_PV_QUOTED_DECL(s, RExC_utf8, dsv, exp, plen, 60); |
| 6396 | PerlIO_printf(Perl_debug_log, "%sCompiling REx%s %s\n", |
| 6397 | PL_colors[4],PL_colors[5],s); |
| 6398 | }); |
| 6399 | |
| 6400 | redo_first_pass: |
| 6401 | /* we jump here if we upgrade the pattern to utf8 and have to |
| 6402 | * recompile */ |
| 6403 | |
| 6404 | if ((pm_flags & PMf_USE_RE_EVAL) |
| 6405 | /* this second condition covers the non-regex literal case, |
| 6406 | * i.e. $foo =~ '(?{})'. */ |
| 6407 | || (IN_PERL_COMPILETIME && (PL_hints & HINT_RE_EVAL)) |
| 6408 | ) |
| 6409 | runtime_code = S_has_runtime_code(aTHX_ pRExC_state, exp, plen); |
| 6410 | |
| 6411 | /* return old regex if pattern hasn't changed */ |
| 6412 | /* XXX: note in the below we have to check the flags as well as the |
| 6413 | * pattern. |
| 6414 | * |
| 6415 | * Things get a touch tricky as we have to compare the utf8 flag |
| 6416 | * independently from the compile flags. */ |
| 6417 | |
| 6418 | if ( old_re |
| 6419 | && !recompile |
| 6420 | && !!RX_UTF8(old_re) == !!RExC_utf8 |
| 6421 | && ( RX_COMPFLAGS(old_re) == ( orig_rx_flags & RXf_PMf_FLAGCOPYMASK ) ) |
| 6422 | && RX_PRECOMP(old_re) |
| 6423 | && RX_PRELEN(old_re) == plen |
| 6424 | && memEQ(RX_PRECOMP(old_re), exp, plen) |
| 6425 | && !runtime_code /* with runtime code, always recompile */ ) |
| 6426 | { |
| 6427 | Safefree(pRExC_state->code_blocks); |
| 6428 | return old_re; |
| 6429 | } |
| 6430 | |
| 6431 | rx_flags = orig_rx_flags; |
| 6432 | |
| 6433 | if (rx_flags & PMf_FOLD) { |
| 6434 | RExC_contains_i = 1; |
| 6435 | } |
| 6436 | if (RExC_utf8 && initial_charset == REGEX_DEPENDS_CHARSET) { |
| 6437 | |
| 6438 | /* Set to use unicode semantics if the pattern is in utf8 and has the |
| 6439 | * 'depends' charset specified, as it means unicode when utf8 */ |
| 6440 | set_regex_charset(&rx_flags, REGEX_UNICODE_CHARSET); |
| 6441 | } |
| 6442 | |
| 6443 | RExC_precomp = exp; |
| 6444 | RExC_flags = rx_flags; |
| 6445 | RExC_pm_flags = pm_flags; |
| 6446 | |
| 6447 | if (runtime_code) { |
| 6448 | if (TAINTING_get && TAINT_get) |
| 6449 | Perl_croak(aTHX_ "Eval-group in insecure regular expression"); |
| 6450 | |
| 6451 | if (!S_compile_runtime_code(aTHX_ pRExC_state, exp, plen)) { |
| 6452 | /* whoops, we have a non-utf8 pattern, whilst run-time code |
| 6453 | * got compiled as utf8. Try again with a utf8 pattern */ |
| 6454 | S_pat_upgrade_to_utf8(aTHX_ pRExC_state, &exp, &plen, |
| 6455 | pRExC_state->num_code_blocks); |
| 6456 | goto redo_first_pass; |
| 6457 | } |
| 6458 | } |
| 6459 | assert(!pRExC_state->runtime_code_qr); |
| 6460 | |
| 6461 | RExC_sawback = 0; |
| 6462 | |
| 6463 | RExC_seen = 0; |
| 6464 | RExC_maxlen = 0; |
| 6465 | RExC_in_lookbehind = 0; |
| 6466 | RExC_seen_zerolen = *exp == '^' ? -1 : 0; |
| 6467 | RExC_extralen = 0; |
| 6468 | RExC_override_recoding = 0; |
| 6469 | RExC_in_multi_char_class = 0; |
| 6470 | |
| 6471 | /* First pass: determine size, legality. */ |
| 6472 | RExC_parse = exp; |
| 6473 | RExC_start = exp; |
| 6474 | RExC_end = exp + plen; |
| 6475 | RExC_naughty = 0; |
| 6476 | RExC_npar = 1; |
| 6477 | RExC_nestroot = 0; |
| 6478 | RExC_size = 0L; |
| 6479 | RExC_emit = (regnode *) &RExC_emit_dummy; |
| 6480 | RExC_whilem_seen = 0; |
| 6481 | RExC_open_parens = NULL; |
| 6482 | RExC_close_parens = NULL; |
| 6483 | RExC_opend = NULL; |
| 6484 | RExC_paren_names = NULL; |
| 6485 | #ifdef DEBUGGING |
| 6486 | RExC_paren_name_list = NULL; |
| 6487 | #endif |
| 6488 | RExC_recurse = NULL; |
| 6489 | RExC_study_chunk_recursed = NULL; |
| 6490 | RExC_study_chunk_recursed_bytes= 0; |
| 6491 | RExC_recurse_count = 0; |
| 6492 | pRExC_state->code_index = 0; |
| 6493 | |
| 6494 | #if 0 /* REGC() is (currently) a NOP at the first pass. |
| 6495 | * Clever compilers notice this and complain. --jhi */ |
| 6496 | REGC((U8)REG_MAGIC, (char*)RExC_emit); |
| 6497 | #endif |
| 6498 | DEBUG_PARSE_r( |
| 6499 | PerlIO_printf(Perl_debug_log, "Starting first pass (sizing)\n"); |
| 6500 | RExC_lastnum=0; |
| 6501 | RExC_lastparse=NULL; |
| 6502 | ); |
| 6503 | /* reg may croak on us, not giving us a chance to free |
| 6504 | pRExC_state->code_blocks. We cannot SAVEFREEPV it now, as we may |
| 6505 | need it to survive as long as the regexp (qr/(?{})/). |
| 6506 | We must check that code_blocksv is not already set, because we may |
| 6507 | have jumped back to restart the sizing pass. */ |
| 6508 | if (pRExC_state->code_blocks && !code_blocksv) { |
| 6509 | code_blocksv = newSV_type(SVt_PV); |
| 6510 | SAVEFREESV(code_blocksv); |
| 6511 | SvPV_set(code_blocksv, (char *)pRExC_state->code_blocks); |
| 6512 | SvLEN_set(code_blocksv, 1); /*sufficient to make sv_clear free it*/ |
| 6513 | } |
| 6514 | if (reg(pRExC_state, 0, &flags,1) == NULL) { |
| 6515 | /* It's possible to write a regexp in ascii that represents Unicode |
| 6516 | codepoints outside of the byte range, such as via \x{100}. If we |
| 6517 | detect such a sequence we have to convert the entire pattern to utf8 |
| 6518 | and then recompile, as our sizing calculation will have been based |
| 6519 | on 1 byte == 1 character, but we will need to use utf8 to encode |
| 6520 | at least some part of the pattern, and therefore must convert the whole |
| 6521 | thing. |
| 6522 | -- dmq */ |
| 6523 | if (flags & RESTART_UTF8) { |
| 6524 | S_pat_upgrade_to_utf8(aTHX_ pRExC_state, &exp, &plen, |
| 6525 | pRExC_state->num_code_blocks); |
| 6526 | goto redo_first_pass; |
| 6527 | } |
| 6528 | Perl_croak(aTHX_ "panic: reg returned NULL to re_op_compile for sizing pass, flags=%#"UVxf"", (UV) flags); |
| 6529 | } |
| 6530 | if (code_blocksv) |
| 6531 | SvLEN_set(code_blocksv,0); /* no you can't have it, sv_clear */ |
| 6532 | |
| 6533 | DEBUG_PARSE_r({ |
| 6534 | PerlIO_printf(Perl_debug_log, |
| 6535 | "Required size %"IVdf" nodes\n" |
| 6536 | "Starting second pass (creation)\n", |
| 6537 | (IV)RExC_size); |
| 6538 | RExC_lastnum=0; |
| 6539 | RExC_lastparse=NULL; |
| 6540 | }); |
| 6541 | |
| 6542 | /* The first pass could have found things that force Unicode semantics */ |
| 6543 | if ((RExC_utf8 || RExC_uni_semantics) |
| 6544 | && get_regex_charset(rx_flags) == REGEX_DEPENDS_CHARSET) |
| 6545 | { |
| 6546 | set_regex_charset(&rx_flags, REGEX_UNICODE_CHARSET); |
| 6547 | } |
| 6548 | |
| 6549 | /* Small enough for pointer-storage convention? |
| 6550 | If extralen==0, this means that we will not need long jumps. */ |
| 6551 | if (RExC_size >= 0x10000L && RExC_extralen) |
| 6552 | RExC_size += RExC_extralen; |
| 6553 | else |
| 6554 | RExC_extralen = 0; |
| 6555 | if (RExC_whilem_seen > 15) |
| 6556 | RExC_whilem_seen = 15; |
| 6557 | |
| 6558 | /* Allocate space and zero-initialize. Note, the two step process |
| 6559 | of zeroing when in debug mode, thus anything assigned has to |
| 6560 | happen after that */ |
| 6561 | rx = (REGEXP*) newSV_type(SVt_REGEXP); |
| 6562 | r = ReANY(rx); |
| 6563 | Newxc(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode), |
| 6564 | char, regexp_internal); |
| 6565 | if ( r == NULL || ri == NULL ) |
| 6566 | FAIL("Regexp out of space"); |
| 6567 | #ifdef DEBUGGING |
| 6568 | /* avoid reading uninitialized memory in DEBUGGING code in study_chunk() */ |
| 6569 | Zero(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode), |
| 6570 | char); |
| 6571 | #else |
| 6572 | /* bulk initialize base fields with 0. */ |
| 6573 | Zero(ri, sizeof(regexp_internal), char); |
| 6574 | #endif |
| 6575 | |
| 6576 | /* non-zero initialization begins here */ |
| 6577 | RXi_SET( r, ri ); |
| 6578 | r->engine= eng; |
| 6579 | r->extflags = rx_flags; |
| 6580 | RXp_COMPFLAGS(r) = orig_rx_flags & RXf_PMf_FLAGCOPYMASK; |
| 6581 | |
| 6582 | if (pm_flags & PMf_IS_QR) { |
| 6583 | ri->code_blocks = pRExC_state->code_blocks; |
| 6584 | ri->num_code_blocks = pRExC_state->num_code_blocks; |
| 6585 | } |
| 6586 | else |
| 6587 | { |
| 6588 | int n; |
| 6589 | for (n = 0; n < pRExC_state->num_code_blocks; n++) |
| 6590 | if (pRExC_state->code_blocks[n].src_regex) |
| 6591 | SAVEFREESV(pRExC_state->code_blocks[n].src_regex); |
| 6592 | SAVEFREEPV(pRExC_state->code_blocks); |
| 6593 | } |
| 6594 | |
| 6595 | { |
| 6596 | bool has_p = ((r->extflags & RXf_PMf_KEEPCOPY) == RXf_PMf_KEEPCOPY); |
| 6597 | bool has_charset = (get_regex_charset(r->extflags) |
| 6598 | != REGEX_DEPENDS_CHARSET); |
| 6599 | |
| 6600 | /* The caret is output if there are any defaults: if not all the STD |
| 6601 | * flags are set, or if no character set specifier is needed */ |
| 6602 | bool has_default = |
| 6603 | (((r->extflags & RXf_PMf_STD_PMMOD) != RXf_PMf_STD_PMMOD) |
| 6604 | || ! has_charset); |
| 6605 | bool has_runon = ((RExC_seen & REG_RUN_ON_COMMENT_SEEN) |
| 6606 | == REG_RUN_ON_COMMENT_SEEN); |
| 6607 | U16 reganch = (U16)((r->extflags & RXf_PMf_STD_PMMOD) |
| 6608 | >> RXf_PMf_STD_PMMOD_SHIFT); |
| 6609 | const char *fptr = STD_PAT_MODS; /*"msix"*/ |
| 6610 | char *p; |
| 6611 | /* Allocate for the worst case, which is all the std flags are turned |
| 6612 | * on. If more precision is desired, we could do a population count of |
| 6613 | * the flags set. This could be done with a small lookup table, or by |
| 6614 | * shifting, masking and adding, or even, when available, assembly |
| 6615 | * language for a machine-language population count. |
| 6616 | * We never output a minus, as all those are defaults, so are |
| 6617 | * covered by the caret */ |
| 6618 | const STRLEN wraplen = plen + has_p + has_runon |
| 6619 | + has_default /* If needs a caret */ |
| 6620 | |
| 6621 | /* If needs a character set specifier */ |
| 6622 | + ((has_charset) ? MAX_CHARSET_NAME_LENGTH : 0) |
| 6623 | + (sizeof(STD_PAT_MODS) - 1) |
| 6624 | + (sizeof("(?:)") - 1); |
| 6625 | |
| 6626 | Newx(p, wraplen + 1, char); /* +1 for the ending NUL */ |
| 6627 | r->xpv_len_u.xpvlenu_pv = p; |
| 6628 | if (RExC_utf8) |
| 6629 | SvFLAGS(rx) |= SVf_UTF8; |
| 6630 | *p++='('; *p++='?'; |
| 6631 | |
| 6632 | /* If a default, cover it using the caret */ |
| 6633 | if (has_default) { |
| 6634 | *p++= DEFAULT_PAT_MOD; |
| 6635 | } |
| 6636 | if (has_charset) { |
| 6637 | STRLEN len; |
| 6638 | const char* const name = get_regex_charset_name(r->extflags, &len); |
| 6639 | Copy(name, p, len, char); |
| 6640 | p += len; |
| 6641 | } |
| 6642 | if (has_p) |
| 6643 | *p++ = KEEPCOPY_PAT_MOD; /*'p'*/ |
| 6644 | { |
| 6645 | char ch; |
| 6646 | while((ch = *fptr++)) { |
| 6647 | if(reganch & 1) |
| 6648 | *p++ = ch; |
| 6649 | reganch >>= 1; |
| 6650 | } |
| 6651 | } |
| 6652 | |
| 6653 | *p++ = ':'; |
| 6654 | Copy(RExC_precomp, p, plen, char); |
| 6655 | assert ((RX_WRAPPED(rx) - p) < 16); |
| 6656 | r->pre_prefix = p - RX_WRAPPED(rx); |
| 6657 | p += plen; |
| 6658 | if (has_runon) |
| 6659 | *p++ = '\n'; |
| 6660 | *p++ = ')'; |
| 6661 | *p = 0; |
| 6662 | SvCUR_set(rx, p - RX_WRAPPED(rx)); |
| 6663 | } |
| 6664 | |
| 6665 | r->intflags = 0; |
| 6666 | r->nparens = RExC_npar - 1; /* set early to validate backrefs */ |
| 6667 | |
| 6668 | /* setup various meta data about recursion, this all requires |
| 6669 | * RExC_npar to be correctly set, and a bit later on we clear it */ |
| 6670 | if (RExC_seen & REG_RECURSE_SEEN) { |
| 6671 | Newxz(RExC_open_parens, RExC_npar,regnode *); |
| 6672 | SAVEFREEPV(RExC_open_parens); |
| 6673 | Newxz(RExC_close_parens,RExC_npar,regnode *); |
| 6674 | SAVEFREEPV(RExC_close_parens); |
| 6675 | } |
| 6676 | if (RExC_seen & (REG_RECURSE_SEEN | REG_GOSTART_SEEN)) { |
| 6677 | /* Note, RExC_npar is 1 + the number of parens in a pattern. |
| 6678 | * So its 1 if there are no parens. */ |
| 6679 | RExC_study_chunk_recursed_bytes= (RExC_npar >> 3) + |
| 6680 | ((RExC_npar & 0x07) != 0); |
| 6681 | Newx(RExC_study_chunk_recursed, |
| 6682 | RExC_study_chunk_recursed_bytes * RExC_npar, U8); |
| 6683 | SAVEFREEPV(RExC_study_chunk_recursed); |
| 6684 | } |
| 6685 | |
| 6686 | /* Useful during FAIL. */ |
| 6687 | #ifdef RE_TRACK_PATTERN_OFFSETS |
| 6688 | Newxz(ri->u.offsets, 2*RExC_size+1, U32); /* MJD 20001228 */ |
| 6689 | DEBUG_OFFSETS_r(PerlIO_printf(Perl_debug_log, |
| 6690 | "%s %"UVuf" bytes for offset annotations.\n", |
| 6691 | ri->u.offsets ? "Got" : "Couldn't get", |
| 6692 | (UV)((2*RExC_size+1) * sizeof(U32)))); |
| 6693 | #endif |
| 6694 | SetProgLen(ri,RExC_size); |
| 6695 | RExC_rx_sv = rx; |
| 6696 | RExC_rx = r; |
| 6697 | RExC_rxi = ri; |
| 6698 | |
| 6699 | /* Second pass: emit code. */ |
| 6700 | RExC_flags = rx_flags; /* don't let top level (?i) bleed */ |
| 6701 | RExC_pm_flags = pm_flags; |
| 6702 | RExC_parse = exp; |
| 6703 | RExC_end = exp + plen; |
| 6704 | RExC_naughty = 0; |
| 6705 | RExC_npar = 1; |
| 6706 | RExC_emit_start = ri->program; |
| 6707 | RExC_emit = ri->program; |
| 6708 | RExC_emit_bound = ri->program + RExC_size + 1; |
| 6709 | pRExC_state->code_index = 0; |
| 6710 | |
| 6711 | REGC((U8)REG_MAGIC, (char*) RExC_emit++); |
| 6712 | if (reg(pRExC_state, 0, &flags,1) == NULL) { |
| 6713 | ReREFCNT_dec(rx); |
| 6714 | Perl_croak(aTHX_ "panic: reg returned NULL to re_op_compile for generation pass, flags=%#"UVxf"", (UV) flags); |
| 6715 | } |
| 6716 | /* XXXX To minimize changes to RE engine we always allocate |
| 6717 | 3-units-long substrs field. */ |
| 6718 | Newx(r->substrs, 1, struct reg_substr_data); |
| 6719 | if (RExC_recurse_count) { |
| 6720 | Newxz(RExC_recurse,RExC_recurse_count,regnode *); |
| 6721 | SAVEFREEPV(RExC_recurse); |
| 6722 | } |
| 6723 | |
| 6724 | reStudy: |
| 6725 | r->minlen = minlen = sawlookahead = sawplus = sawopen = sawminmod = 0; |
| 6726 | Zero(r->substrs, 1, struct reg_substr_data); |
| 6727 | if (RExC_study_chunk_recursed) |
| 6728 | Zero(RExC_study_chunk_recursed, |
| 6729 | RExC_study_chunk_recursed_bytes * RExC_npar, U8); |
| 6730 | |
| 6731 | #ifdef TRIE_STUDY_OPT |
| 6732 | if (!restudied) { |
| 6733 | StructCopy(&zero_scan_data, &data, scan_data_t); |
| 6734 | copyRExC_state = RExC_state; |
| 6735 | } else { |
| 6736 | U32 seen=RExC_seen; |
| 6737 | DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log,"Restudying\n")); |
| 6738 | |
| 6739 | RExC_state = copyRExC_state; |
| 6740 | if (seen & REG_TOP_LEVEL_BRANCHES_SEEN) |
| 6741 | RExC_seen |= REG_TOP_LEVEL_BRANCHES_SEEN; |
| 6742 | else |
| 6743 | RExC_seen &= ~REG_TOP_LEVEL_BRANCHES_SEEN; |
| 6744 | StructCopy(&zero_scan_data, &data, scan_data_t); |
| 6745 | } |
| 6746 | #else |
| 6747 | StructCopy(&zero_scan_data, &data, scan_data_t); |
| 6748 | #endif |
| 6749 | |
| 6750 | /* Dig out information for optimizations. */ |
| 6751 | r->extflags = RExC_flags; /* was pm_op */ |
| 6752 | /*dmq: removed as part of de-PMOP: pm->op_pmflags = RExC_flags; */ |
| 6753 | |
| 6754 | if (UTF) |
| 6755 | SvUTF8_on(rx); /* Unicode in it? */ |
| 6756 | ri->regstclass = NULL; |
| 6757 | if (RExC_naughty >= 10) /* Probably an expensive pattern. */ |
| 6758 | r->intflags |= PREGf_NAUGHTY; |
| 6759 | scan = ri->program + 1; /* First BRANCH. */ |
| 6760 | |
| 6761 | /* testing for BRANCH here tells us whether there is "must appear" |
| 6762 | data in the pattern. If there is then we can use it for optimisations */ |
| 6763 | if (!(RExC_seen & REG_TOP_LEVEL_BRANCHES_SEEN)) { /* Only one top-level choice. |
| 6764 | */ |
| 6765 | SSize_t fake; |
| 6766 | STRLEN longest_float_length, longest_fixed_length; |
| 6767 | regnode_ssc ch_class; /* pointed to by data */ |
| 6768 | int stclass_flag; |
| 6769 | SSize_t last_close = 0; /* pointed to by data */ |
| 6770 | regnode *first= scan; |
| 6771 | regnode *first_next= regnext(first); |
| 6772 | /* |
| 6773 | * Skip introductions and multiplicators >= 1 |
| 6774 | * so that we can extract the 'meat' of the pattern that must |
| 6775 | * match in the large if() sequence following. |
| 6776 | * NOTE that EXACT is NOT covered here, as it is normally |
| 6777 | * picked up by the optimiser separately. |
| 6778 | * |
| 6779 | * This is unfortunate as the optimiser isnt handling lookahead |
| 6780 | * properly currently. |
| 6781 | * |
| 6782 | */ |
| 6783 | while ((OP(first) == OPEN && (sawopen = 1)) || |
| 6784 | /* An OR of *one* alternative - should not happen now. */ |
| 6785 | (OP(first) == BRANCH && OP(first_next) != BRANCH) || |
| 6786 | /* for now we can't handle lookbehind IFMATCH*/ |
| 6787 | (OP(first) == IFMATCH && !first->flags && (sawlookahead = 1)) || |
| 6788 | (OP(first) == PLUS) || |
| 6789 | (OP(first) == MINMOD) || |
| 6790 | /* An {n,m} with n>0 */ |
| 6791 | (PL_regkind[OP(first)] == CURLY && ARG1(first) > 0) || |
| 6792 | (OP(first) == NOTHING && PL_regkind[OP(first_next)] != END )) |
| 6793 | { |
| 6794 | /* |
| 6795 | * the only op that could be a regnode is PLUS, all the rest |
| 6796 | * will be regnode_1 or regnode_2. |
| 6797 | * |
| 6798 | * (yves doesn't think this is true) |
| 6799 | */ |
| 6800 | if (OP(first) == PLUS) |
| 6801 | sawplus = 1; |
| 6802 | else { |
| 6803 | if (OP(first) == MINMOD) |
| 6804 | sawminmod = 1; |
| 6805 | first += regarglen[OP(first)]; |
| 6806 | } |
| 6807 | first = NEXTOPER(first); |
| 6808 | first_next= regnext(first); |
| 6809 | } |
| 6810 | |
| 6811 | /* Starting-point info. */ |
| 6812 | again: |
| 6813 | DEBUG_PEEP("first:",first,0); |
| 6814 | /* Ignore EXACT as we deal with it later. */ |
| 6815 | if (PL_regkind[OP(first)] == EXACT) { |
| 6816 | if (OP(first) == EXACT) |
| 6817 | NOOP; /* Empty, get anchored substr later. */ |
| 6818 | else |
| 6819 | ri->regstclass = first; |
| 6820 | } |
| 6821 | #ifdef TRIE_STCLASS |
| 6822 | else if (PL_regkind[OP(first)] == TRIE && |
| 6823 | ((reg_trie_data *)ri->data->data[ ARG(first) ])->minlen>0) |
| 6824 | { |
| 6825 | /* this can happen only on restudy */ |
| 6826 | ri->regstclass = construct_ahocorasick_from_trie(pRExC_state, (regnode *)first, 0); |
| 6827 | } |
| 6828 | #endif |
| 6829 | else if (REGNODE_SIMPLE(OP(first))) |
| 6830 | ri->regstclass = first; |
| 6831 | else if (PL_regkind[OP(first)] == BOUND || |
| 6832 | PL_regkind[OP(first)] == NBOUND) |
| 6833 | ri->regstclass = first; |
| 6834 | else if (PL_regkind[OP(first)] == BOL) { |
| 6835 | r->intflags |= (OP(first) == MBOL |
| 6836 | ? PREGf_ANCH_MBOL |
| 6837 | : (OP(first) == SBOL |
| 6838 | ? PREGf_ANCH_SBOL |
| 6839 | : PREGf_ANCH_BOL)); |
| 6840 | first = NEXTOPER(first); |
| 6841 | goto again; |
| 6842 | } |
| 6843 | else if (OP(first) == GPOS) { |
| 6844 | r->intflags |= PREGf_ANCH_GPOS; |
| 6845 | first = NEXTOPER(first); |
| 6846 | goto again; |
| 6847 | } |
| 6848 | else if ((!sawopen || !RExC_sawback) && |
| 6849 | !sawlookahead && |
| 6850 | (OP(first) == STAR && |
| 6851 | PL_regkind[OP(NEXTOPER(first))] == REG_ANY) && |
| 6852 | !(r->intflags & PREGf_ANCH) && !pRExC_state->num_code_blocks) |
| 6853 | { |
| 6854 | /* turn .* into ^.* with an implied $*=1 */ |
| 6855 | const int type = |
| 6856 | (OP(NEXTOPER(first)) == REG_ANY) |
| 6857 | ? PREGf_ANCH_MBOL |
| 6858 | : PREGf_ANCH_SBOL; |
| 6859 | r->intflags |= (type | PREGf_IMPLICIT); |
| 6860 | first = NEXTOPER(first); |
| 6861 | goto again; |
| 6862 | } |
| 6863 | if (sawplus && !sawminmod && !sawlookahead |
| 6864 | && (!sawopen || !RExC_sawback) |
| 6865 | && !pRExC_state->num_code_blocks) /* May examine pos and $& */ |
| 6866 | /* x+ must match at the 1st pos of run of x's */ |
| 6867 | r->intflags |= PREGf_SKIP; |
| 6868 | |
| 6869 | /* Scan is after the zeroth branch, first is atomic matcher. */ |
| 6870 | #ifdef TRIE_STUDY_OPT |
| 6871 | DEBUG_PARSE_r( |
| 6872 | if (!restudied) |
| 6873 | PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n", |
| 6874 | (IV)(first - scan + 1)) |
| 6875 | ); |
| 6876 | #else |
| 6877 | DEBUG_PARSE_r( |
| 6878 | PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n", |
| 6879 | (IV)(first - scan + 1)) |
| 6880 | ); |
| 6881 | #endif |
| 6882 | |
| 6883 | |
| 6884 | /* |
| 6885 | * If there's something expensive in the r.e., find the |
| 6886 | * longest literal string that must appear and make it the |
| 6887 | * regmust. Resolve ties in favor of later strings, since |
| 6888 | * the regstart check works with the beginning of the r.e. |
| 6889 | * and avoiding duplication strengthens checking. Not a |
| 6890 | * strong reason, but sufficient in the absence of others. |
| 6891 | * [Now we resolve ties in favor of the earlier string if |
| 6892 | * it happens that c_offset_min has been invalidated, since the |
| 6893 | * earlier string may buy us something the later one won't.] |
| 6894 | */ |
| 6895 | |
| 6896 | data.longest_fixed = newSVpvs(""); |
| 6897 | data.longest_float = newSVpvs(""); |
| 6898 | data.last_found = newSVpvs(""); |
| 6899 | data.longest = &(data.longest_fixed); |
| 6900 | ENTER_with_name("study_chunk"); |
| 6901 | SAVEFREESV(data.longest_fixed); |
| 6902 | SAVEFREESV(data.longest_float); |
| 6903 | SAVEFREESV(data.last_found); |
| 6904 | first = scan; |
| 6905 | if (!ri->regstclass) { |
| 6906 | ssc_init(pRExC_state, &ch_class); |
| 6907 | data.start_class = &ch_class; |
| 6908 | stclass_flag = SCF_DO_STCLASS_AND; |
| 6909 | } else /* XXXX Check for BOUND? */ |
| 6910 | stclass_flag = 0; |
| 6911 | data.last_closep = &last_close; |
| 6912 | |
| 6913 | DEBUG_RExC_seen(); |
| 6914 | minlen = study_chunk(pRExC_state, &first, &minlen, &fake, |
| 6915 | scan + RExC_size, /* Up to end */ |
| 6916 | &data, -1, 0, NULL, |
| 6917 | SCF_DO_SUBSTR | SCF_WHILEM_VISITED_POS | stclass_flag |
| 6918 | | (restudied ? SCF_TRIE_DOING_RESTUDY : 0), |
| 6919 | 0); |
| 6920 | |
| 6921 | |
| 6922 | CHECK_RESTUDY_GOTO_butfirst(LEAVE_with_name("study_chunk")); |
| 6923 | |
| 6924 | |
| 6925 | if ( RExC_npar == 1 && data.longest == &(data.longest_fixed) |
| 6926 | && data.last_start_min == 0 && data.last_end > 0 |
| 6927 | && !RExC_seen_zerolen |
| 6928 | && !(RExC_seen & REG_VERBARG_SEEN) |
| 6929 | && !(RExC_seen & REG_GPOS_SEEN) |
| 6930 | ){ |
| 6931 | r->extflags |= RXf_CHECK_ALL; |
| 6932 | } |
| 6933 | scan_commit(pRExC_state, &data,&minlen,0); |
| 6934 | |
| 6935 | longest_float_length = CHR_SVLEN(data.longest_float); |
| 6936 | |
| 6937 | if (! ((SvCUR(data.longest_fixed) /* ok to leave SvCUR */ |
| 6938 | && data.offset_fixed == data.offset_float_min |
| 6939 | && SvCUR(data.longest_fixed) == SvCUR(data.longest_float))) |
| 6940 | && S_setup_longest (aTHX_ pRExC_state, |
| 6941 | data.longest_float, |
| 6942 | &(r->float_utf8), |
| 6943 | &(r->float_substr), |
| 6944 | &(r->float_end_shift), |
| 6945 | data.lookbehind_float, |
| 6946 | data.offset_float_min, |
| 6947 | data.minlen_float, |
| 6948 | longest_float_length, |
| 6949 | cBOOL(data.flags & SF_FL_BEFORE_EOL), |
| 6950 | cBOOL(data.flags & SF_FL_BEFORE_MEOL))) |
| 6951 | { |
| 6952 | r->float_min_offset = data.offset_float_min - data.lookbehind_float; |
| 6953 | r->float_max_offset = data.offset_float_max; |
| 6954 | if (data.offset_float_max < SSize_t_MAX) /* Don't offset infinity */ |
| 6955 | r->float_max_offset -= data.lookbehind_float; |
| 6956 | SvREFCNT_inc_simple_void_NN(data.longest_float); |
| 6957 | } |
| 6958 | else { |
| 6959 | r->float_substr = r->float_utf8 = NULL; |
| 6960 | longest_float_length = 0; |
| 6961 | } |
| 6962 | |
| 6963 | longest_fixed_length = CHR_SVLEN(data.longest_fixed); |
| 6964 | |
| 6965 | if (S_setup_longest (aTHX_ pRExC_state, |
| 6966 | data.longest_fixed, |
| 6967 | &(r->anchored_utf8), |
| 6968 | &(r->anchored_substr), |
| 6969 | &(r->anchored_end_shift), |
| 6970 | data.lookbehind_fixed, |
| 6971 | data.offset_fixed, |
| 6972 | data.minlen_fixed, |
| 6973 | longest_fixed_length, |
| 6974 | cBOOL(data.flags & SF_FIX_BEFORE_EOL), |
| 6975 | cBOOL(data.flags & SF_FIX_BEFORE_MEOL))) |
| 6976 | { |
| 6977 | r->anchored_offset = data.offset_fixed - data.lookbehind_fixed; |
| 6978 | SvREFCNT_inc_simple_void_NN(data.longest_fixed); |
| 6979 | } |
| 6980 | else { |
| 6981 | r->anchored_substr = r->anchored_utf8 = NULL; |
| 6982 | longest_fixed_length = 0; |
| 6983 | } |
| 6984 | LEAVE_with_name("study_chunk"); |
| 6985 | |
| 6986 | if (ri->regstclass |
| 6987 | && (OP(ri->regstclass) == REG_ANY || OP(ri->regstclass) == SANY)) |
| 6988 | ri->regstclass = NULL; |
| 6989 | |
| 6990 | if ((!(r->anchored_substr || r->anchored_utf8) || r->anchored_offset) |
| 6991 | && stclass_flag |
| 6992 | && ! (ANYOF_FLAGS(data.start_class) & ANYOF_EMPTY_STRING) |
| 6993 | && !ssc_is_anything(data.start_class)) |
| 6994 | { |
| 6995 | const U32 n = add_data(pRExC_state, STR_WITH_LEN("f")); |
| 6996 | |
| 6997 | ssc_finalize(pRExC_state, data.start_class); |
| 6998 | |
| 6999 | Newx(RExC_rxi->data->data[n], 1, regnode_ssc); |
| 7000 | StructCopy(data.start_class, |
| 7001 | (regnode_ssc*)RExC_rxi->data->data[n], |
| 7002 | regnode_ssc); |
| 7003 | ri->regstclass = (regnode*)RExC_rxi->data->data[n]; |
| 7004 | r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */ |
| 7005 | DEBUG_COMPILE_r({ SV *sv = sv_newmortal(); |
| 7006 | regprop(r, sv, (regnode*)data.start_class, NULL); |
| 7007 | PerlIO_printf(Perl_debug_log, |
| 7008 | "synthetic stclass \"%s\".\n", |
| 7009 | SvPVX_const(sv));}); |
| 7010 | data.start_class = NULL; |
| 7011 | } |
| 7012 | |
| 7013 | /* A temporary algorithm prefers floated substr to fixed one to dig |
| 7014 | * more info. */ |
| 7015 | if (longest_fixed_length > longest_float_length) { |
| 7016 | r->substrs->check_ix = 0; |
| 7017 | r->check_end_shift = r->anchored_end_shift; |
| 7018 | r->check_substr = r->anchored_substr; |
| 7019 | r->check_utf8 = r->anchored_utf8; |
| 7020 | r->check_offset_min = r->check_offset_max = r->anchored_offset; |
| 7021 | if (r->intflags & (PREGf_ANCH_SBOL|PREGf_ANCH_GPOS)) |
| 7022 | r->intflags |= PREGf_NOSCAN; |
| 7023 | } |
| 7024 | else { |
| 7025 | r->substrs->check_ix = 1; |
| 7026 | r->check_end_shift = r->float_end_shift; |
| 7027 | r->check_substr = r->float_substr; |
| 7028 | r->check_utf8 = r->float_utf8; |
| 7029 | r->check_offset_min = r->float_min_offset; |
| 7030 | r->check_offset_max = r->float_max_offset; |
| 7031 | } |
| 7032 | if ((r->check_substr || r->check_utf8) ) { |
| 7033 | r->extflags |= RXf_USE_INTUIT; |
| 7034 | if (SvTAIL(r->check_substr ? r->check_substr : r->check_utf8)) |
| 7035 | r->extflags |= RXf_INTUIT_TAIL; |
| 7036 | } |
| 7037 | r->substrs->data[0].max_offset = r->substrs->data[0].min_offset; |
| 7038 | |
| 7039 | /* XXX Unneeded? dmq (shouldn't as this is handled elsewhere) |
| 7040 | if ( (STRLEN)minlen < longest_float_length ) |
| 7041 | minlen= longest_float_length; |
| 7042 | if ( (STRLEN)minlen < longest_fixed_length ) |
| 7043 | minlen= longest_fixed_length; |
| 7044 | */ |
| 7045 | } |
| 7046 | else { |
| 7047 | /* Several toplevels. Best we can is to set minlen. */ |
| 7048 | SSize_t fake; |
| 7049 | regnode_ssc ch_class; |
| 7050 | SSize_t last_close = 0; |
| 7051 | |
| 7052 | DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "\nMulti Top Level\n")); |
| 7053 | |
| 7054 | scan = ri->program + 1; |
| 7055 | ssc_init(pRExC_state, &ch_class); |
| 7056 | data.start_class = &ch_class; |
| 7057 | data.last_closep = &last_close; |
| 7058 | |
| 7059 | DEBUG_RExC_seen(); |
| 7060 | minlen = study_chunk(pRExC_state, |
| 7061 | &scan, &minlen, &fake, scan + RExC_size, &data, -1, 0, NULL, |
| 7062 | SCF_DO_STCLASS_AND|SCF_WHILEM_VISITED_POS|(restudied |
| 7063 | ? SCF_TRIE_DOING_RESTUDY |
| 7064 | : 0), |
| 7065 | 0); |
| 7066 | |
| 7067 | CHECK_RESTUDY_GOTO_butfirst(NOOP); |
| 7068 | |
| 7069 | r->check_substr = r->check_utf8 = r->anchored_substr = r->anchored_utf8 |
| 7070 | = r->float_substr = r->float_utf8 = NULL; |
| 7071 | |
| 7072 | if (! (ANYOF_FLAGS(data.start_class) & ANYOF_EMPTY_STRING) |
| 7073 | && ! ssc_is_anything(data.start_class)) |
| 7074 | { |
| 7075 | const U32 n = add_data(pRExC_state, STR_WITH_LEN("f")); |
| 7076 | |
| 7077 | ssc_finalize(pRExC_state, data.start_class); |
| 7078 | |
| 7079 | Newx(RExC_rxi->data->data[n], 1, regnode_ssc); |
| 7080 | StructCopy(data.start_class, |
| 7081 | (regnode_ssc*)RExC_rxi->data->data[n], |
| 7082 | regnode_ssc); |
| 7083 | ri->regstclass = (regnode*)RExC_rxi->data->data[n]; |
| 7084 | r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */ |
| 7085 | DEBUG_COMPILE_r({ SV* sv = sv_newmortal(); |
| 7086 | regprop(r, sv, (regnode*)data.start_class, NULL); |
| 7087 | PerlIO_printf(Perl_debug_log, |
| 7088 | "synthetic stclass \"%s\".\n", |
| 7089 | SvPVX_const(sv));}); |
| 7090 | data.start_class = NULL; |
| 7091 | } |
| 7092 | } |
| 7093 | |
| 7094 | if (RExC_seen & REG_UNBOUNDED_QUANTIFIER_SEEN) { |
| 7095 | r->extflags |= RXf_UNBOUNDED_QUANTIFIER_SEEN; |
| 7096 | r->maxlen = REG_INFTY; |
| 7097 | } |
| 7098 | else { |
| 7099 | r->maxlen = RExC_maxlen; |
| 7100 | } |
| 7101 | |
| 7102 | /* Guard against an embedded (?=) or (?<=) with a longer minlen than |
| 7103 | the "real" pattern. */ |
| 7104 | DEBUG_OPTIMISE_r({ |
| 7105 | PerlIO_printf(Perl_debug_log,"minlen: %"IVdf" r->minlen:%"IVdf" maxlen:%ld\n", |
| 7106 | (IV)minlen, (IV)r->minlen, RExC_maxlen); |
| 7107 | }); |
| 7108 | r->minlenret = minlen; |
| 7109 | if (r->minlen < minlen) |
| 7110 | r->minlen = minlen; |
| 7111 | |
| 7112 | if (RExC_seen & REG_GPOS_SEEN) |
| 7113 | r->intflags |= PREGf_GPOS_SEEN; |
| 7114 | if (RExC_seen & REG_LOOKBEHIND_SEEN) |
| 7115 | r->extflags |= RXf_NO_INPLACE_SUBST; /* inplace might break the |
| 7116 | lookbehind */ |
| 7117 | if (pRExC_state->num_code_blocks) |
| 7118 | r->extflags |= RXf_EVAL_SEEN; |
| 7119 | if (RExC_seen & REG_CANY_SEEN) |
| 7120 | r->intflags |= PREGf_CANY_SEEN; |
| 7121 | if (RExC_seen & REG_VERBARG_SEEN) |
| 7122 | { |
| 7123 | r->intflags |= PREGf_VERBARG_SEEN; |
| 7124 | r->extflags |= RXf_NO_INPLACE_SUBST; /* don't understand this! Yves */ |
| 7125 | } |
| 7126 | if (RExC_seen & REG_CUTGROUP_SEEN) |
| 7127 | r->intflags |= PREGf_CUTGROUP_SEEN; |
| 7128 | if (pm_flags & PMf_USE_RE_EVAL) |
| 7129 | r->intflags |= PREGf_USE_RE_EVAL; |
| 7130 | if (RExC_paren_names) |
| 7131 | RXp_PAREN_NAMES(r) = MUTABLE_HV(SvREFCNT_inc(RExC_paren_names)); |
| 7132 | else |
| 7133 | RXp_PAREN_NAMES(r) = NULL; |
| 7134 | |
| 7135 | /* If we have seen an anchor in our pattern then we set the extflag RXf_IS_ANCHORED |
| 7136 | * so it can be used in pp.c */ |
| 7137 | if (r->intflags & PREGf_ANCH) |
| 7138 | r->extflags |= RXf_IS_ANCHORED; |
| 7139 | |
| 7140 | |
| 7141 | { |
| 7142 | /* this is used to identify "special" patterns that might result |
| 7143 | * in Perl NOT calling the regex engine and instead doing the match "itself", |
| 7144 | * particularly special cases in split//. By having the regex compiler |
| 7145 | * do this pattern matching at a regop level (instead of by inspecting the pattern) |
| 7146 | * we avoid weird issues with equivalent patterns resulting in different behavior, |
| 7147 | * AND we allow non Perl engines to get the same optimizations by the setting the |
| 7148 | * flags appropriately - Yves */ |
| 7149 | regnode *first = ri->program + 1; |
| 7150 | U8 fop = OP(first); |
| 7151 | regnode *next = NEXTOPER(first); |
| 7152 | U8 nop = OP(next); |
| 7153 | |
| 7154 | if (PL_regkind[fop] == NOTHING && nop == END) |
| 7155 | r->extflags |= RXf_NULL; |
| 7156 | else if (PL_regkind[fop] == BOL && nop == END) |
| 7157 | r->extflags |= RXf_START_ONLY; |
| 7158 | else if (fop == PLUS |
| 7159 | && PL_regkind[nop] == POSIXD && FLAGS(next) == _CC_SPACE |
| 7160 | && OP(regnext(first)) == END) |
| 7161 | r->extflags |= RXf_WHITE; |
| 7162 | else if ( r->extflags & RXf_SPLIT |
| 7163 | && fop == EXACT |
| 7164 | && STR_LEN(first) == 1 |
| 7165 | && *(STRING(first)) == ' ' |
| 7166 | && OP(regnext(first)) == END ) |
| 7167 | r->extflags |= (RXf_SKIPWHITE|RXf_WHITE); |
| 7168 | |
| 7169 | } |
| 7170 | |
| 7171 | if (RExC_contains_locale) { |
| 7172 | RXp_EXTFLAGS(r) |= RXf_TAINTED; |
| 7173 | } |
| 7174 | |
| 7175 | #ifdef DEBUGGING |
| 7176 | if (RExC_paren_names) { |
| 7177 | ri->name_list_idx = add_data( pRExC_state, STR_WITH_LEN("a")); |
| 7178 | ri->data->data[ri->name_list_idx] |
| 7179 | = (void*)SvREFCNT_inc(RExC_paren_name_list); |
| 7180 | } else |
| 7181 | #endif |
| 7182 | ri->name_list_idx = 0; |
| 7183 | |
| 7184 | if (RExC_recurse_count) { |
| 7185 | for ( ; RExC_recurse_count ; RExC_recurse_count-- ) { |
| 7186 | const regnode *scan = RExC_recurse[RExC_recurse_count-1]; |
| 7187 | ARG2L_SET( scan, RExC_open_parens[ARG(scan)-1] - scan ); |
| 7188 | } |
| 7189 | } |
| 7190 | Newxz(r->offs, RExC_npar, regexp_paren_pair); |
| 7191 | /* assume we don't need to swap parens around before we match */ |
| 7192 | |
| 7193 | DEBUG_DUMP_r({ |
| 7194 | DEBUG_RExC_seen(); |
| 7195 | PerlIO_printf(Perl_debug_log,"Final program:\n"); |
| 7196 | regdump(r); |
| 7197 | }); |
| 7198 | #ifdef RE_TRACK_PATTERN_OFFSETS |
| 7199 | DEBUG_OFFSETS_r(if (ri->u.offsets) { |
| 7200 | const STRLEN len = ri->u.offsets[0]; |
| 7201 | STRLEN i; |
| 7202 | GET_RE_DEBUG_FLAGS_DECL; |
| 7203 | PerlIO_printf(Perl_debug_log, |
| 7204 | "Offsets: [%"UVuf"]\n\t", (UV)ri->u.offsets[0]); |
| 7205 | for (i = 1; i <= len; i++) { |
| 7206 | if (ri->u.offsets[i*2-1] || ri->u.offsets[i*2]) |
| 7207 | PerlIO_printf(Perl_debug_log, "%"UVuf":%"UVuf"[%"UVuf"] ", |
| 7208 | (UV)i, (UV)ri->u.offsets[i*2-1], (UV)ri->u.offsets[i*2]); |
| 7209 | } |
| 7210 | PerlIO_printf(Perl_debug_log, "\n"); |
| 7211 | }); |
| 7212 | #endif |
| 7213 | |
| 7214 | #ifdef USE_ITHREADS |
| 7215 | /* under ithreads the ?pat? PMf_USED flag on the pmop is simulated |
| 7216 | * by setting the regexp SV to readonly-only instead. If the |
| 7217 | * pattern's been recompiled, the USEDness should remain. */ |
| 7218 | if (old_re && SvREADONLY(old_re)) |
| 7219 | SvREADONLY_on(rx); |
| 7220 | #endif |
| 7221 | return rx; |
| 7222 | } |
| 7223 | |
| 7224 | |
| 7225 | SV* |
| 7226 | Perl_reg_named_buff(pTHX_ REGEXP * const rx, SV * const key, SV * const value, |
| 7227 | const U32 flags) |
| 7228 | { |
| 7229 | PERL_ARGS_ASSERT_REG_NAMED_BUFF; |
| 7230 | |
| 7231 | PERL_UNUSED_ARG(value); |
| 7232 | |
| 7233 | if (flags & RXapif_FETCH) { |
| 7234 | return reg_named_buff_fetch(rx, key, flags); |
| 7235 | } else if (flags & (RXapif_STORE | RXapif_DELETE | RXapif_CLEAR)) { |
| 7236 | Perl_croak_no_modify(); |
| 7237 | return NULL; |
| 7238 | } else if (flags & RXapif_EXISTS) { |
| 7239 | return reg_named_buff_exists(rx, key, flags) |
| 7240 | ? &PL_sv_yes |
| 7241 | : &PL_sv_no; |
| 7242 | } else if (flags & RXapif_REGNAMES) { |
| 7243 | return reg_named_buff_all(rx, flags); |
| 7244 | } else if (flags & (RXapif_SCALAR | RXapif_REGNAMES_COUNT)) { |
| 7245 | return reg_named_buff_scalar(rx, flags); |
| 7246 | } else { |
| 7247 | Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff", (int)flags); |
| 7248 | return NULL; |
| 7249 | } |
| 7250 | } |
| 7251 | |
| 7252 | SV* |
| 7253 | Perl_reg_named_buff_iter(pTHX_ REGEXP * const rx, const SV * const lastkey, |
| 7254 | const U32 flags) |
| 7255 | { |
| 7256 | PERL_ARGS_ASSERT_REG_NAMED_BUFF_ITER; |
| 7257 | PERL_UNUSED_ARG(lastkey); |
| 7258 | |
| 7259 | if (flags & RXapif_FIRSTKEY) |
| 7260 | return reg_named_buff_firstkey(rx, flags); |
| 7261 | else if (flags & RXapif_NEXTKEY) |
| 7262 | return reg_named_buff_nextkey(rx, flags); |
| 7263 | else { |
| 7264 | Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_iter", |
| 7265 | (int)flags); |
| 7266 | return NULL; |
| 7267 | } |
| 7268 | } |
| 7269 | |
| 7270 | SV* |
| 7271 | Perl_reg_named_buff_fetch(pTHX_ REGEXP * const r, SV * const namesv, |
| 7272 | const U32 flags) |
| 7273 | { |
| 7274 | AV *retarray = NULL; |
| 7275 | SV *ret; |
| 7276 | struct regexp *const rx = ReANY(r); |
| 7277 | |
| 7278 | PERL_ARGS_ASSERT_REG_NAMED_BUFF_FETCH; |
| 7279 | |
| 7280 | if (flags & RXapif_ALL) |
| 7281 | retarray=newAV(); |
| 7282 | |
| 7283 | if (rx && RXp_PAREN_NAMES(rx)) { |
| 7284 | HE *he_str = hv_fetch_ent( RXp_PAREN_NAMES(rx), namesv, 0, 0 ); |
| 7285 | if (he_str) { |
| 7286 | IV i; |
| 7287 | SV* sv_dat=HeVAL(he_str); |
| 7288 | I32 *nums=(I32*)SvPVX(sv_dat); |
| 7289 | for ( i=0; i<SvIVX(sv_dat); i++ ) { |
| 7290 | if ((I32)(rx->nparens) >= nums[i] |
| 7291 | && rx->offs[nums[i]].start != -1 |
| 7292 | && rx->offs[nums[i]].end != -1) |
| 7293 | { |
| 7294 | ret = newSVpvs(""); |
| 7295 | CALLREG_NUMBUF_FETCH(r,nums[i],ret); |
| 7296 | if (!retarray) |
| 7297 | return ret; |
| 7298 | } else { |
| 7299 | if (retarray) |
| 7300 | ret = newSVsv(&PL_sv_undef); |
| 7301 | } |
| 7302 | if (retarray) |
| 7303 | av_push(retarray, ret); |
| 7304 | } |
| 7305 | if (retarray) |
| 7306 | return newRV_noinc(MUTABLE_SV(retarray)); |
| 7307 | } |
| 7308 | } |
| 7309 | return NULL; |
| 7310 | } |
| 7311 | |
| 7312 | bool |
| 7313 | Perl_reg_named_buff_exists(pTHX_ REGEXP * const r, SV * const key, |
| 7314 | const U32 flags) |
| 7315 | { |
| 7316 | struct regexp *const rx = ReANY(r); |
| 7317 | |
| 7318 | PERL_ARGS_ASSERT_REG_NAMED_BUFF_EXISTS; |
| 7319 | |
| 7320 | if (rx && RXp_PAREN_NAMES(rx)) { |
| 7321 | if (flags & RXapif_ALL) { |
| 7322 | return hv_exists_ent(RXp_PAREN_NAMES(rx), key, 0); |
| 7323 | } else { |
| 7324 | SV *sv = CALLREG_NAMED_BUFF_FETCH(r, key, flags); |
| 7325 | if (sv) { |
| 7326 | SvREFCNT_dec_NN(sv); |
| 7327 | return TRUE; |
| 7328 | } else { |
| 7329 | return FALSE; |
| 7330 | } |
| 7331 | } |
| 7332 | } else { |
| 7333 | return FALSE; |
| 7334 | } |
| 7335 | } |
| 7336 | |
| 7337 | SV* |
| 7338 | Perl_reg_named_buff_firstkey(pTHX_ REGEXP * const r, const U32 flags) |
| 7339 | { |
| 7340 | struct regexp *const rx = ReANY(r); |
| 7341 | |
| 7342 | PERL_ARGS_ASSERT_REG_NAMED_BUFF_FIRSTKEY; |
| 7343 | |
| 7344 | if ( rx && RXp_PAREN_NAMES(rx) ) { |
| 7345 | (void)hv_iterinit(RXp_PAREN_NAMES(rx)); |
| 7346 | |
| 7347 | return CALLREG_NAMED_BUFF_NEXTKEY(r, NULL, flags & ~RXapif_FIRSTKEY); |
| 7348 | } else { |
| 7349 | return FALSE; |
| 7350 | } |
| 7351 | } |
| 7352 | |
| 7353 | SV* |
| 7354 | Perl_reg_named_buff_nextkey(pTHX_ REGEXP * const r, const U32 flags) |
| 7355 | { |
| 7356 | struct regexp *const rx = ReANY(r); |
| 7357 | GET_RE_DEBUG_FLAGS_DECL; |
| 7358 | |
| 7359 | PERL_ARGS_ASSERT_REG_NAMED_BUFF_NEXTKEY; |
| 7360 | |
| 7361 | if (rx && RXp_PAREN_NAMES(rx)) { |
| 7362 | HV *hv = RXp_PAREN_NAMES(rx); |
| 7363 | HE *temphe; |
| 7364 | while ( (temphe = hv_iternext_flags(hv,0)) ) { |
| 7365 | IV i; |
| 7366 | IV parno = 0; |
| 7367 | SV* sv_dat = HeVAL(temphe); |
| 7368 | I32 *nums = (I32*)SvPVX(sv_dat); |
| 7369 | for ( i = 0; i < SvIVX(sv_dat); i++ ) { |
| 7370 | if ((I32)(rx->lastparen) >= nums[i] && |
| 7371 | rx->offs[nums[i]].start != -1 && |
| 7372 | rx->offs[nums[i]].end != -1) |
| 7373 | { |
| 7374 | parno = nums[i]; |
| 7375 | break; |
| 7376 | } |
| 7377 | } |
| 7378 | if (parno || flags & RXapif_ALL) { |
| 7379 | return newSVhek(HeKEY_hek(temphe)); |
| 7380 | } |
| 7381 | } |
| 7382 | } |
| 7383 | return NULL; |
| 7384 | } |
| 7385 | |
| 7386 | SV* |
| 7387 | Perl_reg_named_buff_scalar(pTHX_ REGEXP * const r, const U32 flags) |
| 7388 | { |
| 7389 | SV *ret; |
| 7390 | AV *av; |
| 7391 | SSize_t length; |
| 7392 | struct regexp *const rx = ReANY(r); |
| 7393 | |
| 7394 | PERL_ARGS_ASSERT_REG_NAMED_BUFF_SCALAR; |
| 7395 | |
| 7396 | if (rx && RXp_PAREN_NAMES(rx)) { |
| 7397 | if (flags & (RXapif_ALL | RXapif_REGNAMES_COUNT)) { |
| 7398 | return newSViv(HvTOTALKEYS(RXp_PAREN_NAMES(rx))); |
| 7399 | } else if (flags & RXapif_ONE) { |
| 7400 | ret = CALLREG_NAMED_BUFF_ALL(r, (flags | RXapif_REGNAMES)); |
| 7401 | av = MUTABLE_AV(SvRV(ret)); |
| 7402 | length = av_tindex(av); |
| 7403 | SvREFCNT_dec_NN(ret); |
| 7404 | return newSViv(length + 1); |
| 7405 | } else { |
| 7406 | Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_scalar", |
| 7407 | (int)flags); |
| 7408 | return NULL; |
| 7409 | } |
| 7410 | } |
| 7411 | return &PL_sv_undef; |
| 7412 | } |
| 7413 | |
| 7414 | SV* |
| 7415 | Perl_reg_named_buff_all(pTHX_ REGEXP * const r, const U32 flags) |
| 7416 | { |
| 7417 | struct regexp *const rx = ReANY(r); |
| 7418 | AV *av = newAV(); |
| 7419 | |
| 7420 | PERL_ARGS_ASSERT_REG_NAMED_BUFF_ALL; |
| 7421 | |
| 7422 | if (rx && RXp_PAREN_NAMES(rx)) { |
| 7423 | HV *hv= RXp_PAREN_NAMES(rx); |
| 7424 | HE *temphe; |
| 7425 | (void)hv_iterinit(hv); |
| 7426 | while ( (temphe = hv_iternext_flags(hv,0)) ) { |
| 7427 | IV i; |
| 7428 | IV parno = 0; |
| 7429 | SV* sv_dat = HeVAL(temphe); |
| 7430 | I32 *nums = (I32*)SvPVX(sv_dat); |
| 7431 | for ( i = 0; i < SvIVX(sv_dat); i++ ) { |
| 7432 | if ((I32)(rx->lastparen) >= nums[i] && |
| 7433 | rx->offs[nums[i]].start != -1 && |
| 7434 | rx->offs[nums[i]].end != -1) |
| 7435 | { |
| 7436 | parno = nums[i]; |
| 7437 | break; |
| 7438 | } |
| 7439 | } |
| 7440 | if (parno || flags & RXapif_ALL) { |
| 7441 | av_push(av, newSVhek(HeKEY_hek(temphe))); |
| 7442 | } |
| 7443 | } |
| 7444 | } |
| 7445 | |
| 7446 | return newRV_noinc(MUTABLE_SV(av)); |
| 7447 | } |
| 7448 | |
| 7449 | void |
| 7450 | Perl_reg_numbered_buff_fetch(pTHX_ REGEXP * const r, const I32 paren, |
| 7451 | SV * const sv) |
| 7452 | { |
| 7453 | struct regexp *const rx = ReANY(r); |
| 7454 | char *s = NULL; |
| 7455 | SSize_t i = 0; |
| 7456 | SSize_t s1, t1; |
| 7457 | I32 n = paren; |
| 7458 | |
| 7459 | PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_FETCH; |
| 7460 | |
| 7461 | if ( n == RX_BUFF_IDX_CARET_PREMATCH |
| 7462 | || n == RX_BUFF_IDX_CARET_FULLMATCH |
| 7463 | || n == RX_BUFF_IDX_CARET_POSTMATCH |
| 7464 | ) |
| 7465 | { |
| 7466 | bool keepcopy = cBOOL(rx->extflags & RXf_PMf_KEEPCOPY); |
| 7467 | if (!keepcopy) { |
| 7468 | /* on something like |
| 7469 | * $r = qr/.../; |
| 7470 | * /$qr/p; |
| 7471 | * the KEEPCOPY is set on the PMOP rather than the regex */ |
| 7472 | if (PL_curpm && r == PM_GETRE(PL_curpm)) |
| 7473 | keepcopy = cBOOL(PL_curpm->op_pmflags & PMf_KEEPCOPY); |
| 7474 | } |
| 7475 | if (!keepcopy) |
| 7476 | goto ret_undef; |
| 7477 | } |
| 7478 | |
| 7479 | if (!rx->subbeg) |
| 7480 | goto ret_undef; |
| 7481 | |
| 7482 | if (n == RX_BUFF_IDX_CARET_FULLMATCH) |
| 7483 | /* no need to distinguish between them any more */ |
| 7484 | n = RX_BUFF_IDX_FULLMATCH; |
| 7485 | |
| 7486 | if ((n == RX_BUFF_IDX_PREMATCH || n == RX_BUFF_IDX_CARET_PREMATCH) |
| 7487 | && rx->offs[0].start != -1) |
| 7488 | { |
| 7489 | /* $`, ${^PREMATCH} */ |
| 7490 | i = rx->offs[0].start; |
| 7491 | s = rx->subbeg; |
| 7492 | } |
| 7493 | else |
| 7494 | if ((n == RX_BUFF_IDX_POSTMATCH || n == RX_BUFF_IDX_CARET_POSTMATCH) |
| 7495 | && rx->offs[0].end != -1) |
| 7496 | { |
| 7497 | /* $', ${^POSTMATCH} */ |
| 7498 | s = rx->subbeg - rx->suboffset + rx->offs[0].end; |
| 7499 | i = rx->sublen + rx->suboffset - rx->offs[0].end; |
| 7500 | } |
| 7501 | else |
| 7502 | if ( 0 <= n && n <= (I32)rx->nparens && |
| 7503 | (s1 = rx->offs[n].start) != -1 && |
| 7504 | (t1 = rx->offs[n].end) != -1) |
| 7505 | { |
| 7506 | /* $&, ${^MATCH}, $1 ... */ |
| 7507 | i = t1 - s1; |
| 7508 | s = rx->subbeg + s1 - rx->suboffset; |
| 7509 | } else { |
| 7510 | goto ret_undef; |
| 7511 | } |
| 7512 | |
| 7513 | assert(s >= rx->subbeg); |
| 7514 | assert((STRLEN)rx->sublen >= (STRLEN)((s - rx->subbeg) + i) ); |
| 7515 | if (i >= 0) { |
| 7516 | #ifdef NO_TAINT_SUPPORT |
| 7517 | sv_setpvn(sv, s, i); |
| 7518 | #else |
| 7519 | const int oldtainted = TAINT_get; |
| 7520 | TAINT_NOT; |
| 7521 | sv_setpvn(sv, s, i); |
| 7522 | TAINT_set(oldtainted); |
| 7523 | #endif |
| 7524 | if ( (rx->intflags & PREGf_CANY_SEEN) |
| 7525 | ? (RXp_MATCH_UTF8(rx) |
| 7526 | && (!i || is_utf8_string((U8*)s, i))) |
| 7527 | : (RXp_MATCH_UTF8(rx)) ) |
| 7528 | { |
| 7529 | SvUTF8_on(sv); |
| 7530 | } |
| 7531 | else |
| 7532 | SvUTF8_off(sv); |
| 7533 | if (TAINTING_get) { |
| 7534 | if (RXp_MATCH_TAINTED(rx)) { |
| 7535 | if (SvTYPE(sv) >= SVt_PVMG) { |
| 7536 | MAGIC* const mg = SvMAGIC(sv); |
| 7537 | MAGIC* mgt; |
| 7538 | TAINT; |
| 7539 | SvMAGIC_set(sv, mg->mg_moremagic); |
| 7540 | SvTAINT(sv); |
| 7541 | if ((mgt = SvMAGIC(sv))) { |
| 7542 | mg->mg_moremagic = mgt; |
| 7543 | SvMAGIC_set(sv, mg); |
| 7544 | } |
| 7545 | } else { |
| 7546 | TAINT; |
| 7547 | SvTAINT(sv); |
| 7548 | } |
| 7549 | } else |
| 7550 | SvTAINTED_off(sv); |
| 7551 | } |
| 7552 | } else { |
| 7553 | ret_undef: |
| 7554 | sv_setsv(sv,&PL_sv_undef); |
| 7555 | return; |
| 7556 | } |
| 7557 | } |
| 7558 | |
| 7559 | void |
| 7560 | Perl_reg_numbered_buff_store(pTHX_ REGEXP * const rx, const I32 paren, |
| 7561 | SV const * const value) |
| 7562 | { |
| 7563 | PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_STORE; |
| 7564 | |
| 7565 | PERL_UNUSED_ARG(rx); |
| 7566 | PERL_UNUSED_ARG(paren); |
| 7567 | PERL_UNUSED_ARG(value); |
| 7568 | |
| 7569 | if (!PL_localizing) |
| 7570 | Perl_croak_no_modify(); |
| 7571 | } |
| 7572 | |
| 7573 | I32 |
| 7574 | Perl_reg_numbered_buff_length(pTHX_ REGEXP * const r, const SV * const sv, |
| 7575 | const I32 paren) |
| 7576 | { |
| 7577 | struct regexp *const rx = ReANY(r); |
| 7578 | I32 i; |
| 7579 | I32 s1, t1; |
| 7580 | |
| 7581 | PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_LENGTH; |
| 7582 | |
| 7583 | if ( paren == RX_BUFF_IDX_CARET_PREMATCH |
| 7584 | || paren == RX_BUFF_IDX_CARET_FULLMATCH |
| 7585 | || paren == RX_BUFF_IDX_CARET_POSTMATCH |
| 7586 | ) |
| 7587 | { |
| 7588 | bool keepcopy = cBOOL(rx->extflags & RXf_PMf_KEEPCOPY); |
| 7589 | if (!keepcopy) { |
| 7590 | /* on something like |
| 7591 | * $r = qr/.../; |
| 7592 | * /$qr/p; |
| 7593 | * the KEEPCOPY is set on the PMOP rather than the regex */ |
| 7594 | if (PL_curpm && r == PM_GETRE(PL_curpm)) |
| 7595 | keepcopy = cBOOL(PL_curpm->op_pmflags & PMf_KEEPCOPY); |
| 7596 | } |
| 7597 | if (!keepcopy) |
| 7598 | goto warn_undef; |
| 7599 | } |
| 7600 | |
| 7601 | /* Some of this code was originally in C<Perl_magic_len> in F<mg.c> */ |
| 7602 | switch (paren) { |
| 7603 | case RX_BUFF_IDX_CARET_PREMATCH: /* ${^PREMATCH} */ |
| 7604 | case RX_BUFF_IDX_PREMATCH: /* $` */ |
| 7605 | if (rx->offs[0].start != -1) { |
| 7606 | i = rx->offs[0].start; |
| 7607 | if (i > 0) { |
| 7608 | s1 = 0; |
| 7609 | t1 = i; |
| 7610 | goto getlen; |
| 7611 | } |
| 7612 | } |
| 7613 | return 0; |
| 7614 | |
| 7615 | case RX_BUFF_IDX_CARET_POSTMATCH: /* ${^POSTMATCH} */ |
| 7616 | case RX_BUFF_IDX_POSTMATCH: /* $' */ |
| 7617 | if (rx->offs[0].end != -1) { |
| 7618 | i = rx->sublen - rx->offs[0].end; |
| 7619 | if (i > 0) { |
| 7620 | s1 = rx->offs[0].end; |
| 7621 | t1 = rx->sublen; |
| 7622 | goto getlen; |
| 7623 | } |
| 7624 | } |
| 7625 | return 0; |
| 7626 | |
| 7627 | default: /* $& / ${^MATCH}, $1, $2, ... */ |
| 7628 | if (paren <= (I32)rx->nparens && |
| 7629 | (s1 = rx->offs[paren].start) != -1 && |
| 7630 | (t1 = rx->offs[paren].end) != -1) |
| 7631 | { |
| 7632 | i = t1 - s1; |
| 7633 | goto getlen; |
| 7634 | } else { |
| 7635 | warn_undef: |
| 7636 | if (ckWARN(WARN_UNINITIALIZED)) |
| 7637 | report_uninit((const SV *)sv); |
| 7638 | return 0; |
| 7639 | } |
| 7640 | } |
| 7641 | getlen: |
| 7642 | if (i > 0 && RXp_MATCH_UTF8(rx)) { |
| 7643 | const char * const s = rx->subbeg - rx->suboffset + s1; |
| 7644 | const U8 *ep; |
| 7645 | STRLEN el; |
| 7646 | |
| 7647 | i = t1 - s1; |
| 7648 | if (is_utf8_string_loclen((U8*)s, i, &ep, &el)) |
| 7649 | i = el; |
| 7650 | } |
| 7651 | return i; |
| 7652 | } |
| 7653 | |
| 7654 | SV* |
| 7655 | Perl_reg_qr_package(pTHX_ REGEXP * const rx) |
| 7656 | { |
| 7657 | PERL_ARGS_ASSERT_REG_QR_PACKAGE; |
| 7658 | PERL_UNUSED_ARG(rx); |
| 7659 | if (0) |
| 7660 | return NULL; |
| 7661 | else |
| 7662 | return newSVpvs("Regexp"); |
| 7663 | } |
| 7664 | |
| 7665 | /* Scans the name of a named buffer from the pattern. |
| 7666 | * If flags is REG_RSN_RETURN_NULL returns null. |
| 7667 | * If flags is REG_RSN_RETURN_NAME returns an SV* containing the name |
| 7668 | * If flags is REG_RSN_RETURN_DATA returns the data SV* corresponding |
| 7669 | * to the parsed name as looked up in the RExC_paren_names hash. |
| 7670 | * If there is an error throws a vFAIL().. type exception. |
| 7671 | */ |
| 7672 | |
| 7673 | #define REG_RSN_RETURN_NULL 0 |
| 7674 | #define REG_RSN_RETURN_NAME 1 |
| 7675 | #define REG_RSN_RETURN_DATA 2 |
| 7676 | |
| 7677 | STATIC SV* |
| 7678 | S_reg_scan_name(pTHX_ RExC_state_t *pRExC_state, U32 flags) |
| 7679 | { |
| 7680 | char *name_start = RExC_parse; |
| 7681 | |
| 7682 | PERL_ARGS_ASSERT_REG_SCAN_NAME; |
| 7683 | |
| 7684 | assert (RExC_parse <= RExC_end); |
| 7685 | if (RExC_parse == RExC_end) NOOP; |
| 7686 | else if (isIDFIRST_lazy_if(RExC_parse, UTF)) { |
| 7687 | /* skip IDFIRST by using do...while */ |
| 7688 | if (UTF) |
| 7689 | do { |
| 7690 | RExC_parse += UTF8SKIP(RExC_parse); |
| 7691 | } while (isWORDCHAR_utf8((U8*)RExC_parse)); |
| 7692 | else |
| 7693 | do { |
| 7694 | RExC_parse++; |
| 7695 | } while (isWORDCHAR(*RExC_parse)); |
| 7696 | } else { |
| 7697 | RExC_parse++; /* so the <- from the vFAIL is after the offending |
| 7698 | character */ |
| 7699 | vFAIL("Group name must start with a non-digit word character"); |
| 7700 | } |
| 7701 | if ( flags ) { |
| 7702 | SV* sv_name |
| 7703 | = newSVpvn_flags(name_start, (int)(RExC_parse - name_start), |
| 7704 | SVs_TEMP | (UTF ? SVf_UTF8 : 0)); |
| 7705 | if ( flags == REG_RSN_RETURN_NAME) |
| 7706 | return sv_name; |
| 7707 | else if (flags==REG_RSN_RETURN_DATA) { |
| 7708 | HE *he_str = NULL; |
| 7709 | SV *sv_dat = NULL; |
| 7710 | if ( ! sv_name ) /* should not happen*/ |
| 7711 | Perl_croak(aTHX_ "panic: no svname in reg_scan_name"); |
| 7712 | if (RExC_paren_names) |
| 7713 | he_str = hv_fetch_ent( RExC_paren_names, sv_name, 0, 0 ); |
| 7714 | if ( he_str ) |
| 7715 | sv_dat = HeVAL(he_str); |
| 7716 | if ( ! sv_dat ) |
| 7717 | vFAIL("Reference to nonexistent named group"); |
| 7718 | return sv_dat; |
| 7719 | } |
| 7720 | else { |
| 7721 | Perl_croak(aTHX_ "panic: bad flag %lx in reg_scan_name", |
| 7722 | (unsigned long) flags); |
| 7723 | } |
| 7724 | assert(0); /* NOT REACHED */ |
| 7725 | } |
| 7726 | return NULL; |
| 7727 | } |
| 7728 | |
| 7729 | #define DEBUG_PARSE_MSG(funcname) DEBUG_PARSE_r({ \ |
| 7730 | int rem=(int)(RExC_end - RExC_parse); \ |
| 7731 | int cut; \ |
| 7732 | int num; \ |
| 7733 | int iscut=0; \ |
| 7734 | if (rem>10) { \ |
| 7735 | rem=10; \ |
| 7736 | iscut=1; \ |
| 7737 | } \ |
| 7738 | cut=10-rem; \ |
| 7739 | if (RExC_lastparse!=RExC_parse) \ |
| 7740 | PerlIO_printf(Perl_debug_log," >%.*s%-*s", \ |
| 7741 | rem, RExC_parse, \ |
| 7742 | cut + 4, \ |
| 7743 | iscut ? "..." : "<" \ |
| 7744 | ); \ |
| 7745 | else \ |
| 7746 | PerlIO_printf(Perl_debug_log,"%16s",""); \ |
| 7747 | \ |
| 7748 | if (SIZE_ONLY) \ |
| 7749 | num = RExC_size + 1; \ |
| 7750 | else \ |
| 7751 | num=REG_NODE_NUM(RExC_emit); \ |
| 7752 | if (RExC_lastnum!=num) \ |
| 7753 | PerlIO_printf(Perl_debug_log,"|%4d",num); \ |
| 7754 | else \ |
| 7755 | PerlIO_printf(Perl_debug_log,"|%4s",""); \ |
| 7756 | PerlIO_printf(Perl_debug_log,"|%*s%-4s", \ |
| 7757 | (int)((depth*2)), "", \ |
| 7758 | (funcname) \ |
| 7759 | ); \ |
| 7760 | RExC_lastnum=num; \ |
| 7761 | RExC_lastparse=RExC_parse; \ |
| 7762 | }) |
| 7763 | |
| 7764 | |
| 7765 | |
| 7766 | #define DEBUG_PARSE(funcname) DEBUG_PARSE_r({ \ |
| 7767 | DEBUG_PARSE_MSG((funcname)); \ |
| 7768 | PerlIO_printf(Perl_debug_log,"%4s","\n"); \ |
| 7769 | }) |
| 7770 | #define DEBUG_PARSE_FMT(funcname,fmt,args) DEBUG_PARSE_r({ \ |
| 7771 | DEBUG_PARSE_MSG((funcname)); \ |
| 7772 | PerlIO_printf(Perl_debug_log,fmt "\n",args); \ |
| 7773 | }) |
| 7774 | |
| 7775 | /* This section of code defines the inversion list object and its methods. The |
| 7776 | * interfaces are highly subject to change, so as much as possible is static to |
| 7777 | * this file. An inversion list is here implemented as a malloc'd C UV array |
| 7778 | * as an SVt_INVLIST scalar. |
| 7779 | * |
| 7780 | * An inversion list for Unicode is an array of code points, sorted by ordinal |
| 7781 | * number. The zeroth element is the first code point in the list. The 1th |
| 7782 | * element is the first element beyond that not in the list. In other words, |
| 7783 | * the first range is |
| 7784 | * invlist[0]..(invlist[1]-1) |
| 7785 | * The other ranges follow. Thus every element whose index is divisible by two |
| 7786 | * marks the beginning of a range that is in the list, and every element not |
| 7787 | * divisible by two marks the beginning of a range not in the list. A single |
| 7788 | * element inversion list that contains the single code point N generally |
| 7789 | * consists of two elements |
| 7790 | * invlist[0] == N |
| 7791 | * invlist[1] == N+1 |
| 7792 | * (The exception is when N is the highest representable value on the |
| 7793 | * machine, in which case the list containing just it would be a single |
| 7794 | * element, itself. By extension, if the last range in the list extends to |
| 7795 | * infinity, then the first element of that range will be in the inversion list |
| 7796 | * at a position that is divisible by two, and is the final element in the |
| 7797 | * list.) |
| 7798 | * Taking the complement (inverting) an inversion list is quite simple, if the |
| 7799 | * first element is 0, remove it; otherwise add a 0 element at the beginning. |
| 7800 | * This implementation reserves an element at the beginning of each inversion |
| 7801 | * list to always contain 0; there is an additional flag in the header which |
| 7802 | * indicates if the list begins at the 0, or is offset to begin at the next |
| 7803 | * element. |
| 7804 | * |
| 7805 | * More about inversion lists can be found in "Unicode Demystified" |
| 7806 | * Chapter 13 by Richard Gillam, published by Addison-Wesley. |
| 7807 | * More will be coming when functionality is added later. |
| 7808 | * |
| 7809 | * The inversion list data structure is currently implemented as an SV pointing |
| 7810 | * to an array of UVs that the SV thinks are bytes. This allows us to have an |
| 7811 | * array of UV whose memory management is automatically handled by the existing |
| 7812 | * facilities for SV's. |
| 7813 | * |
| 7814 | * Some of the methods should always be private to the implementation, and some |
| 7815 | * should eventually be made public */ |
| 7816 | |
| 7817 | /* The header definitions are in F<inline_invlist.c> */ |
| 7818 | |
| 7819 | PERL_STATIC_INLINE UV* |
| 7820 | S__invlist_array_init(SV* const invlist, const bool will_have_0) |
| 7821 | { |
| 7822 | /* Returns a pointer to the first element in the inversion list's array. |
| 7823 | * This is called upon initialization of an inversion list. Where the |
| 7824 | * array begins depends on whether the list has the code point U+0000 in it |
| 7825 | * or not. The other parameter tells it whether the code that follows this |
| 7826 | * call is about to put a 0 in the inversion list or not. The first |
| 7827 | * element is either the element reserved for 0, if TRUE, or the element |
| 7828 | * after it, if FALSE */ |
| 7829 | |
| 7830 | bool* offset = get_invlist_offset_addr(invlist); |
| 7831 | UV* zero_addr = (UV *) SvPVX(invlist); |
| 7832 | |
| 7833 | PERL_ARGS_ASSERT__INVLIST_ARRAY_INIT; |
| 7834 | |
| 7835 | /* Must be empty */ |
| 7836 | assert(! _invlist_len(invlist)); |
| 7837 | |
| 7838 | *zero_addr = 0; |
| 7839 | |
| 7840 | /* 1^1 = 0; 1^0 = 1 */ |
| 7841 | *offset = 1 ^ will_have_0; |
| 7842 | return zero_addr + *offset; |
| 7843 | } |
| 7844 | |
| 7845 | PERL_STATIC_INLINE UV* |
| 7846 | S_invlist_array(SV* const invlist) |
| 7847 | { |
| 7848 | /* Returns the pointer to the inversion list's array. Every time the |
| 7849 | * length changes, this needs to be called in case malloc or realloc moved |
| 7850 | * it */ |
| 7851 | |
| 7852 | PERL_ARGS_ASSERT_INVLIST_ARRAY; |
| 7853 | |
| 7854 | /* Must not be empty. If these fail, you probably didn't check for <len> |
| 7855 | * being non-zero before trying to get the array */ |
| 7856 | assert(_invlist_len(invlist)); |
| 7857 | |
| 7858 | /* The very first element always contains zero, The array begins either |
| 7859 | * there, or if the inversion list is offset, at the element after it. |
| 7860 | * The offset header field determines which; it contains 0 or 1 to indicate |
| 7861 | * how much additionally to add */ |
| 7862 | assert(0 == *(SvPVX(invlist))); |
| 7863 | return ((UV *) SvPVX(invlist) + *get_invlist_offset_addr(invlist)); |
| 7864 | } |
| 7865 | |
| 7866 | PERL_STATIC_INLINE void |
| 7867 | S_invlist_set_len(pTHX_ SV* const invlist, const UV len, const bool offset) |
| 7868 | { |
| 7869 | /* Sets the current number of elements stored in the inversion list. |
| 7870 | * Updates SvCUR correspondingly */ |
| 7871 | PERL_UNUSED_CONTEXT; |
| 7872 | PERL_ARGS_ASSERT_INVLIST_SET_LEN; |
| 7873 | |
| 7874 | assert(SvTYPE(invlist) == SVt_INVLIST); |
| 7875 | |
| 7876 | SvCUR_set(invlist, |
| 7877 | (len == 0) |
| 7878 | ? 0 |
| 7879 | : TO_INTERNAL_SIZE(len + offset)); |
| 7880 | assert(SvLEN(invlist) == 0 || SvCUR(invlist) <= SvLEN(invlist)); |
| 7881 | } |
| 7882 | |
| 7883 | PERL_STATIC_INLINE IV* |
| 7884 | S_get_invlist_previous_index_addr(SV* invlist) |
| 7885 | { |
| 7886 | /* Return the address of the IV that is reserved to hold the cached index |
| 7887 | * */ |
| 7888 | PERL_ARGS_ASSERT_GET_INVLIST_PREVIOUS_INDEX_ADDR; |
| 7889 | |
| 7890 | assert(SvTYPE(invlist) == SVt_INVLIST); |
| 7891 | |
| 7892 | return &(((XINVLIST*) SvANY(invlist))->prev_index); |
| 7893 | } |
| 7894 | |
| 7895 | PERL_STATIC_INLINE IV |
| 7896 | S_invlist_previous_index(SV* const invlist) |
| 7897 | { |
| 7898 | /* Returns cached index of previous search */ |
| 7899 | |
| 7900 | PERL_ARGS_ASSERT_INVLIST_PREVIOUS_INDEX; |
| 7901 | |
| 7902 | return *get_invlist_previous_index_addr(invlist); |
| 7903 | } |
| 7904 | |
| 7905 | PERL_STATIC_INLINE void |
| 7906 | S_invlist_set_previous_index(SV* const invlist, const IV index) |
| 7907 | { |
| 7908 | /* Caches <index> for later retrieval */ |
| 7909 | |
| 7910 | PERL_ARGS_ASSERT_INVLIST_SET_PREVIOUS_INDEX; |
| 7911 | |
| 7912 | assert(index == 0 || index < (int) _invlist_len(invlist)); |
| 7913 | |
| 7914 | *get_invlist_previous_index_addr(invlist) = index; |
| 7915 | } |
| 7916 | |
| 7917 | PERL_STATIC_INLINE UV |
| 7918 | S_invlist_max(SV* const invlist) |
| 7919 | { |
| 7920 | /* Returns the maximum number of elements storable in the inversion list's |
| 7921 | * array, without having to realloc() */ |
| 7922 | |
| 7923 | PERL_ARGS_ASSERT_INVLIST_MAX; |
| 7924 | |
| 7925 | assert(SvTYPE(invlist) == SVt_INVLIST); |
| 7926 | |
| 7927 | /* Assumes worst case, in which the 0 element is not counted in the |
| 7928 | * inversion list, so subtracts 1 for that */ |
| 7929 | return SvLEN(invlist) == 0 /* This happens under _new_invlist_C_array */ |
| 7930 | ? FROM_INTERNAL_SIZE(SvCUR(invlist)) - 1 |
| 7931 | : FROM_INTERNAL_SIZE(SvLEN(invlist)) - 1; |
| 7932 | } |
| 7933 | |
| 7934 | #ifndef PERL_IN_XSUB_RE |
| 7935 | SV* |
| 7936 | Perl__new_invlist(pTHX_ IV initial_size) |
| 7937 | { |
| 7938 | |
| 7939 | /* Return a pointer to a newly constructed inversion list, with enough |
| 7940 | * space to store 'initial_size' elements. If that number is negative, a |
| 7941 | * system default is used instead */ |
| 7942 | |
| 7943 | SV* new_list; |
| 7944 | |
| 7945 | if (initial_size < 0) { |
| 7946 | initial_size = 10; |
| 7947 | } |
| 7948 | |
| 7949 | /* Allocate the initial space */ |
| 7950 | new_list = newSV_type(SVt_INVLIST); |
| 7951 | |
| 7952 | /* First 1 is in case the zero element isn't in the list; second 1 is for |
| 7953 | * trailing NUL */ |
| 7954 | SvGROW(new_list, TO_INTERNAL_SIZE(initial_size + 1) + 1); |
| 7955 | invlist_set_len(new_list, 0, 0); |
| 7956 | |
| 7957 | /* Force iterinit() to be used to get iteration to work */ |
| 7958 | *get_invlist_iter_addr(new_list) = (STRLEN) UV_MAX; |
| 7959 | |
| 7960 | *get_invlist_previous_index_addr(new_list) = 0; |
| 7961 | |
| 7962 | return new_list; |
| 7963 | } |
| 7964 | |
| 7965 | SV* |
| 7966 | Perl__new_invlist_C_array(pTHX_ const UV* const list) |
| 7967 | { |
| 7968 | /* Return a pointer to a newly constructed inversion list, initialized to |
| 7969 | * point to <list>, which has to be in the exact correct inversion list |
| 7970 | * form, including internal fields. Thus this is a dangerous routine that |
| 7971 | * should not be used in the wrong hands. The passed in 'list' contains |
| 7972 | * several header fields at the beginning that are not part of the |
| 7973 | * inversion list body proper */ |
| 7974 | |
| 7975 | const STRLEN length = (STRLEN) list[0]; |
| 7976 | const UV version_id = list[1]; |
| 7977 | const bool offset = cBOOL(list[2]); |
| 7978 | #define HEADER_LENGTH 3 |
| 7979 | /* If any of the above changes in any way, you must change HEADER_LENGTH |
| 7980 | * (if appropriate) and regenerate INVLIST_VERSION_ID by running |
| 7981 | * perl -E 'say int(rand 2**31-1)' |
| 7982 | */ |
| 7983 | #define INVLIST_VERSION_ID 148565664 /* This is a combination of a version and |
| 7984 | data structure type, so that one being |
| 7985 | passed in can be validated to be an |
| 7986 | inversion list of the correct vintage. |
| 7987 | */ |
| 7988 | |
| 7989 | SV* invlist = newSV_type(SVt_INVLIST); |
| 7990 | |
| 7991 | PERL_ARGS_ASSERT__NEW_INVLIST_C_ARRAY; |
| 7992 | |
| 7993 | if (version_id != INVLIST_VERSION_ID) { |
| 7994 | Perl_croak(aTHX_ "panic: Incorrect version for previously generated inversion list"); |
| 7995 | } |
| 7996 | |
| 7997 | /* The generated array passed in includes header elements that aren't part |
| 7998 | * of the list proper, so start it just after them */ |
| 7999 | SvPV_set(invlist, (char *) (list + HEADER_LENGTH)); |
| 8000 | |
| 8001 | SvLEN_set(invlist, 0); /* Means we own the contents, and the system |
| 8002 | shouldn't touch it */ |
| 8003 | |
| 8004 | *(get_invlist_offset_addr(invlist)) = offset; |
| 8005 | |
| 8006 | /* The 'length' passed to us is the physical number of elements in the |
| 8007 | * inversion list. But if there is an offset the logical number is one |
| 8008 | * less than that */ |
| 8009 | invlist_set_len(invlist, length - offset, offset); |
| 8010 | |
| 8011 | invlist_set_previous_index(invlist, 0); |
| 8012 | |
| 8013 | /* Initialize the iteration pointer. */ |
| 8014 | invlist_iterfinish(invlist); |
| 8015 | |
| 8016 | SvREADONLY_on(invlist); |
| 8017 | |
| 8018 | return invlist; |
| 8019 | } |
| 8020 | #endif /* ifndef PERL_IN_XSUB_RE */ |
| 8021 | |
| 8022 | STATIC void |
| 8023 | S_invlist_extend(pTHX_ SV* const invlist, const UV new_max) |
| 8024 | { |
| 8025 | /* Grow the maximum size of an inversion list */ |
| 8026 | |
| 8027 | PERL_ARGS_ASSERT_INVLIST_EXTEND; |
| 8028 | |
| 8029 | assert(SvTYPE(invlist) == SVt_INVLIST); |
| 8030 | |
| 8031 | /* Add one to account for the zero element at the beginning which may not |
| 8032 | * be counted by the calling parameters */ |
| 8033 | SvGROW((SV *)invlist, TO_INTERNAL_SIZE(new_max + 1)); |
| 8034 | } |
| 8035 | |
| 8036 | PERL_STATIC_INLINE void |
| 8037 | S_invlist_trim(SV* const invlist) |
| 8038 | { |
| 8039 | PERL_ARGS_ASSERT_INVLIST_TRIM; |
| 8040 | |
| 8041 | assert(SvTYPE(invlist) == SVt_INVLIST); |
| 8042 | |
| 8043 | /* Change the length of the inversion list to how many entries it currently |
| 8044 | * has */ |
| 8045 | SvPV_shrink_to_cur((SV *) invlist); |
| 8046 | } |
| 8047 | |
| 8048 | STATIC void |
| 8049 | S__append_range_to_invlist(pTHX_ SV* const invlist, |
| 8050 | const UV start, const UV end) |
| 8051 | { |
| 8052 | /* Subject to change or removal. Append the range from 'start' to 'end' at |
| 8053 | * the end of the inversion list. The range must be above any existing |
| 8054 | * ones. */ |
| 8055 | |
| 8056 | UV* array; |
| 8057 | UV max = invlist_max(invlist); |
| 8058 | UV len = _invlist_len(invlist); |
| 8059 | bool offset; |
| 8060 | |
| 8061 | PERL_ARGS_ASSERT__APPEND_RANGE_TO_INVLIST; |
| 8062 | |
| 8063 | if (len == 0) { /* Empty lists must be initialized */ |
| 8064 | offset = start != 0; |
| 8065 | array = _invlist_array_init(invlist, ! offset); |
| 8066 | } |
| 8067 | else { |
| 8068 | /* Here, the existing list is non-empty. The current max entry in the |
| 8069 | * list is generally the first value not in the set, except when the |
| 8070 | * set extends to the end of permissible values, in which case it is |
| 8071 | * the first entry in that final set, and so this call is an attempt to |
| 8072 | * append out-of-order */ |
| 8073 | |
| 8074 | UV final_element = len - 1; |
| 8075 | array = invlist_array(invlist); |
| 8076 | if (array[final_element] > start |
| 8077 | || ELEMENT_RANGE_MATCHES_INVLIST(final_element)) |
| 8078 | { |
| 8079 | Perl_croak(aTHX_ "panic: attempting to append to an inversion list, but wasn't at the end of the list, final=%"UVuf", start=%"UVuf", match=%c", |
| 8080 | array[final_element], start, |
| 8081 | ELEMENT_RANGE_MATCHES_INVLIST(final_element) ? 't' : 'f'); |
| 8082 | } |
| 8083 | |
| 8084 | /* Here, it is a legal append. If the new range begins with the first |
| 8085 | * value not in the set, it is extending the set, so the new first |
| 8086 | * value not in the set is one greater than the newly extended range. |
| 8087 | * */ |
| 8088 | offset = *get_invlist_offset_addr(invlist); |
| 8089 | if (array[final_element] == start) { |
| 8090 | if (end != UV_MAX) { |
| 8091 | array[final_element] = end + 1; |
| 8092 | } |
| 8093 | else { |
| 8094 | /* But if the end is the maximum representable on the machine, |
| 8095 | * just let the range that this would extend to have no end */ |
| 8096 | invlist_set_len(invlist, len - 1, offset); |
| 8097 | } |
| 8098 | return; |
| 8099 | } |
| 8100 | } |
| 8101 | |
| 8102 | /* Here the new range doesn't extend any existing set. Add it */ |
| 8103 | |
| 8104 | len += 2; /* Includes an element each for the start and end of range */ |
| 8105 | |
| 8106 | /* If wll overflow the existing space, extend, which may cause the array to |
| 8107 | * be moved */ |
| 8108 | if (max < len) { |
| 8109 | invlist_extend(invlist, len); |
| 8110 | |
| 8111 | /* Have to set len here to avoid assert failure in invlist_array() */ |
| 8112 | invlist_set_len(invlist, len, offset); |
| 8113 | |
| 8114 | array = invlist_array(invlist); |
| 8115 | } |
| 8116 | else { |
| 8117 | invlist_set_len(invlist, len, offset); |
| 8118 | } |
| 8119 | |
| 8120 | /* The next item on the list starts the range, the one after that is |
| 8121 | * one past the new range. */ |
| 8122 | array[len - 2] = start; |
| 8123 | if (end != UV_MAX) { |
| 8124 | array[len - 1] = end + 1; |
| 8125 | } |
| 8126 | else { |
| 8127 | /* But if the end is the maximum representable on the machine, just let |
| 8128 | * the range have no end */ |
| 8129 | invlist_set_len(invlist, len - 1, offset); |
| 8130 | } |
| 8131 | } |
| 8132 | |
| 8133 | #ifndef PERL_IN_XSUB_RE |
| 8134 | |
| 8135 | IV |
| 8136 | Perl__invlist_search(SV* const invlist, const UV cp) |
| 8137 | { |
| 8138 | /* Searches the inversion list for the entry that contains the input code |
| 8139 | * point <cp>. If <cp> is not in the list, -1 is returned. Otherwise, the |
| 8140 | * return value is the index into the list's array of the range that |
| 8141 | * contains <cp> */ |
| 8142 | |
| 8143 | IV low = 0; |
| 8144 | IV mid; |
| 8145 | IV high = _invlist_len(invlist); |
| 8146 | const IV highest_element = high - 1; |
| 8147 | const UV* array; |
| 8148 | |
| 8149 | PERL_ARGS_ASSERT__INVLIST_SEARCH; |
| 8150 | |
| 8151 | /* If list is empty, return failure. */ |
| 8152 | if (high == 0) { |
| 8153 | return -1; |
| 8154 | } |
| 8155 | |
| 8156 | /* (We can't get the array unless we know the list is non-empty) */ |
| 8157 | array = invlist_array(invlist); |
| 8158 | |
| 8159 | mid = invlist_previous_index(invlist); |
| 8160 | assert(mid >=0 && mid <= highest_element); |
| 8161 | |
| 8162 | /* <mid> contains the cache of the result of the previous call to this |
| 8163 | * function (0 the first time). See if this call is for the same result, |
| 8164 | * or if it is for mid-1. This is under the theory that calls to this |
| 8165 | * function will often be for related code points that are near each other. |
| 8166 | * And benchmarks show that caching gives better results. We also test |
| 8167 | * here if the code point is within the bounds of the list. These tests |
| 8168 | * replace others that would have had to be made anyway to make sure that |
| 8169 | * the array bounds were not exceeded, and these give us extra information |
| 8170 | * at the same time */ |
| 8171 | if (cp >= array[mid]) { |
| 8172 | if (cp >= array[highest_element]) { |
| 8173 | return highest_element; |
| 8174 | } |
| 8175 | |
| 8176 | /* Here, array[mid] <= cp < array[highest_element]. This means that |
| 8177 | * the final element is not the answer, so can exclude it; it also |
| 8178 | * means that <mid> is not the final element, so can refer to 'mid + 1' |
| 8179 | * safely */ |
| 8180 | if (cp < array[mid + 1]) { |
| 8181 | return mid; |
| 8182 | } |
| 8183 | high--; |
| 8184 | low = mid + 1; |
| 8185 | } |
| 8186 | else { /* cp < aray[mid] */ |
| 8187 | if (cp < array[0]) { /* Fail if outside the array */ |
| 8188 | return -1; |
| 8189 | } |
| 8190 | high = mid; |
| 8191 | if (cp >= array[mid - 1]) { |
| 8192 | goto found_entry; |
| 8193 | } |
| 8194 | } |
| 8195 | |
| 8196 | /* Binary search. What we are looking for is <i> such that |
| 8197 | * array[i] <= cp < array[i+1] |
| 8198 | * The loop below converges on the i+1. Note that there may not be an |
| 8199 | * (i+1)th element in the array, and things work nonetheless */ |
| 8200 | while (low < high) { |
| 8201 | mid = (low + high) / 2; |
| 8202 | assert(mid <= highest_element); |
| 8203 | if (array[mid] <= cp) { /* cp >= array[mid] */ |
| 8204 | low = mid + 1; |
| 8205 | |
| 8206 | /* We could do this extra test to exit the loop early. |
| 8207 | if (cp < array[low]) { |
| 8208 | return mid; |
| 8209 | } |
| 8210 | */ |
| 8211 | } |
| 8212 | else { /* cp < array[mid] */ |
| 8213 | high = mid; |
| 8214 | } |
| 8215 | } |
| 8216 | |
| 8217 | found_entry: |
| 8218 | high--; |
| 8219 | invlist_set_previous_index(invlist, high); |
| 8220 | return high; |
| 8221 | } |
| 8222 | |
| 8223 | void |
| 8224 | Perl__invlist_populate_swatch(SV* const invlist, |
| 8225 | const UV start, const UV end, U8* swatch) |
| 8226 | { |
| 8227 | /* populates a swatch of a swash the same way swatch_get() does in utf8.c, |
| 8228 | * but is used when the swash has an inversion list. This makes this much |
| 8229 | * faster, as it uses a binary search instead of a linear one. This is |
| 8230 | * intimately tied to that function, and perhaps should be in utf8.c, |
| 8231 | * except it is intimately tied to inversion lists as well. It assumes |
| 8232 | * that <swatch> is all 0's on input */ |
| 8233 | |
| 8234 | UV current = start; |
| 8235 | const IV len = _invlist_len(invlist); |
| 8236 | IV i; |
| 8237 | const UV * array; |
| 8238 | |
| 8239 | PERL_ARGS_ASSERT__INVLIST_POPULATE_SWATCH; |
| 8240 | |
| 8241 | if (len == 0) { /* Empty inversion list */ |
| 8242 | return; |
| 8243 | } |
| 8244 | |
| 8245 | array = invlist_array(invlist); |
| 8246 | |
| 8247 | /* Find which element it is */ |
| 8248 | i = _invlist_search(invlist, start); |
| 8249 | |
| 8250 | /* We populate from <start> to <end> */ |
| 8251 | while (current < end) { |
| 8252 | UV upper; |
| 8253 | |
| 8254 | /* The inversion list gives the results for every possible code point |
| 8255 | * after the first one in the list. Only those ranges whose index is |
| 8256 | * even are ones that the inversion list matches. For the odd ones, |
| 8257 | * and if the initial code point is not in the list, we have to skip |
| 8258 | * forward to the next element */ |
| 8259 | if (i == -1 || ! ELEMENT_RANGE_MATCHES_INVLIST(i)) { |
| 8260 | i++; |
| 8261 | if (i >= len) { /* Finished if beyond the end of the array */ |
| 8262 | return; |
| 8263 | } |
| 8264 | current = array[i]; |
| 8265 | if (current >= end) { /* Finished if beyond the end of what we |
| 8266 | are populating */ |
| 8267 | if (LIKELY(end < UV_MAX)) { |
| 8268 | return; |
| 8269 | } |
| 8270 | |
| 8271 | /* We get here when the upper bound is the maximum |
| 8272 | * representable on the machine, and we are looking for just |
| 8273 | * that code point. Have to special case it */ |
| 8274 | i = len; |
| 8275 | goto join_end_of_list; |
| 8276 | } |
| 8277 | } |
| 8278 | assert(current >= start); |
| 8279 | |
| 8280 | /* The current range ends one below the next one, except don't go past |
| 8281 | * <end> */ |
| 8282 | i++; |
| 8283 | upper = (i < len && array[i] < end) ? array[i] : end; |
| 8284 | |
| 8285 | /* Here we are in a range that matches. Populate a bit in the 3-bit U8 |
| 8286 | * for each code point in it */ |
| 8287 | for (; current < upper; current++) { |
| 8288 | const STRLEN offset = (STRLEN)(current - start); |
| 8289 | swatch[offset >> 3] |= 1 << (offset & 7); |
| 8290 | } |
| 8291 | |
| 8292 | join_end_of_list: |
| 8293 | |
| 8294 | /* Quit if at the end of the list */ |
| 8295 | if (i >= len) { |
| 8296 | |
| 8297 | /* But first, have to deal with the highest possible code point on |
| 8298 | * the platform. The previous code assumes that <end> is one |
| 8299 | * beyond where we want to populate, but that is impossible at the |
| 8300 | * platform's infinity, so have to handle it specially */ |
| 8301 | if (UNLIKELY(end == UV_MAX && ELEMENT_RANGE_MATCHES_INVLIST(len-1))) |
| 8302 | { |
| 8303 | const STRLEN offset = (STRLEN)(end - start); |
| 8304 | swatch[offset >> 3] |= 1 << (offset & 7); |
| 8305 | } |
| 8306 | return; |
| 8307 | } |
| 8308 | |
| 8309 | /* Advance to the next range, which will be for code points not in the |
| 8310 | * inversion list */ |
| 8311 | current = array[i]; |
| 8312 | } |
| 8313 | |
| 8314 | return; |
| 8315 | } |
| 8316 | |
| 8317 | void |
| 8318 | Perl__invlist_union_maybe_complement_2nd(pTHX_ SV* const a, SV* const b, |
| 8319 | const bool complement_b, SV** output) |
| 8320 | { |
| 8321 | /* Take the union of two inversion lists and point <output> to it. *output |
| 8322 | * SHOULD BE DEFINED upon input, and if it points to one of the two lists, |
| 8323 | * the reference count to that list will be decremented if not already a |
| 8324 | * temporary (mortal); otherwise *output will be made correspondingly |
| 8325 | * mortal. The first list, <a>, may be NULL, in which case a copy of the |
| 8326 | * second list is returned. If <complement_b> is TRUE, the union is taken |
| 8327 | * of the complement (inversion) of <b> instead of b itself. |
| 8328 | * |
| 8329 | * The basis for this comes from "Unicode Demystified" Chapter 13 by |
| 8330 | * Richard Gillam, published by Addison-Wesley, and explained at some |
| 8331 | * length there. The preface says to incorporate its examples into your |
| 8332 | * code at your own risk. |
| 8333 | * |
| 8334 | * The algorithm is like a merge sort. |
| 8335 | * |
| 8336 | * XXX A potential performance improvement is to keep track as we go along |
| 8337 | * if only one of the inputs contributes to the result, meaning the other |
| 8338 | * is a subset of that one. In that case, we can skip the final copy and |
| 8339 | * return the larger of the input lists, but then outside code might need |
| 8340 | * to keep track of whether to free the input list or not */ |
| 8341 | |
| 8342 | const UV* array_a; /* a's array */ |
| 8343 | const UV* array_b; |
| 8344 | UV len_a; /* length of a's array */ |
| 8345 | UV len_b; |
| 8346 | |
| 8347 | SV* u; /* the resulting union */ |
| 8348 | UV* array_u; |
| 8349 | UV len_u; |
| 8350 | |
| 8351 | UV i_a = 0; /* current index into a's array */ |
| 8352 | UV i_b = 0; |
| 8353 | UV i_u = 0; |
| 8354 | |
| 8355 | /* running count, as explained in the algorithm source book; items are |
| 8356 | * stopped accumulating and are output when the count changes to/from 0. |
| 8357 | * The count is incremented when we start a range that's in the set, and |
| 8358 | * decremented when we start a range that's not in the set. So its range |
| 8359 | * is 0 to 2. Only when the count is zero is something not in the set. |
| 8360 | */ |
| 8361 | UV count = 0; |
| 8362 | |
| 8363 | PERL_ARGS_ASSERT__INVLIST_UNION_MAYBE_COMPLEMENT_2ND; |
| 8364 | assert(a != b); |
| 8365 | |
| 8366 | /* If either one is empty, the union is the other one */ |
| 8367 | if (a == NULL || ((len_a = _invlist_len(a)) == 0)) { |
| 8368 | bool make_temp = FALSE; /* Should we mortalize the result? */ |
| 8369 | |
| 8370 | if (*output == a) { |
| 8371 | if (a != NULL) { |
| 8372 | if (! (make_temp = cBOOL(SvTEMP(a)))) { |
| 8373 | SvREFCNT_dec_NN(a); |
| 8374 | } |
| 8375 | } |
| 8376 | } |
| 8377 | if (*output != b) { |
| 8378 | *output = invlist_clone(b); |
| 8379 | if (complement_b) { |
| 8380 | _invlist_invert(*output); |
| 8381 | } |
| 8382 | } /* else *output already = b; */ |
| 8383 | |
| 8384 | if (make_temp) { |
| 8385 | sv_2mortal(*output); |
| 8386 | } |
| 8387 | return; |
| 8388 | } |
| 8389 | else if ((len_b = _invlist_len(b)) == 0) { |
| 8390 | bool make_temp = FALSE; |
| 8391 | if (*output == b) { |
| 8392 | if (! (make_temp = cBOOL(SvTEMP(b)))) { |
| 8393 | SvREFCNT_dec_NN(b); |
| 8394 | } |
| 8395 | } |
| 8396 | |
| 8397 | /* The complement of an empty list is a list that has everything in it, |
| 8398 | * so the union with <a> includes everything too */ |
| 8399 | if (complement_b) { |
| 8400 | if (a == *output) { |
| 8401 | if (! (make_temp = cBOOL(SvTEMP(a)))) { |
| 8402 | SvREFCNT_dec_NN(a); |
| 8403 | } |
| 8404 | } |
| 8405 | *output = _new_invlist(1); |
| 8406 | _append_range_to_invlist(*output, 0, UV_MAX); |
| 8407 | } |
| 8408 | else if (*output != a) { |
| 8409 | *output = invlist_clone(a); |
| 8410 | } |
| 8411 | /* else *output already = a; */ |
| 8412 | |
| 8413 | if (make_temp) { |
| 8414 | sv_2mortal(*output); |
| 8415 | } |
| 8416 | return; |
| 8417 | } |
| 8418 | |
| 8419 | /* Here both lists exist and are non-empty */ |
| 8420 | array_a = invlist_array(a); |
| 8421 | array_b = invlist_array(b); |
| 8422 | |
| 8423 | /* If are to take the union of 'a' with the complement of b, set it |
| 8424 | * up so are looking at b's complement. */ |
| 8425 | if (complement_b) { |
| 8426 | |
| 8427 | /* To complement, we invert: if the first element is 0, remove it. To |
| 8428 | * do this, we just pretend the array starts one later */ |
| 8429 | if (array_b[0] == 0) { |
| 8430 | array_b++; |
| 8431 | len_b--; |
| 8432 | } |
| 8433 | else { |
| 8434 | |
| 8435 | /* But if the first element is not zero, we pretend the list starts |
| 8436 | * at the 0 that is always stored immediately before the array. */ |
| 8437 | array_b--; |
| 8438 | len_b++; |
| 8439 | } |
| 8440 | } |
| 8441 | |
| 8442 | /* Size the union for the worst case: that the sets are completely |
| 8443 | * disjoint */ |
| 8444 | u = _new_invlist(len_a + len_b); |
| 8445 | |
| 8446 | /* Will contain U+0000 if either component does */ |
| 8447 | array_u = _invlist_array_init(u, (len_a > 0 && array_a[0] == 0) |
| 8448 | || (len_b > 0 && array_b[0] == 0)); |
| 8449 | |
| 8450 | /* Go through each list item by item, stopping when exhausted one of |
| 8451 | * them */ |
| 8452 | while (i_a < len_a && i_b < len_b) { |
| 8453 | UV cp; /* The element to potentially add to the union's array */ |
| 8454 | bool cp_in_set; /* is it in the the input list's set or not */ |
| 8455 | |
| 8456 | /* We need to take one or the other of the two inputs for the union. |
| 8457 | * Since we are merging two sorted lists, we take the smaller of the |
| 8458 | * next items. In case of a tie, we take the one that is in its set |
| 8459 | * first. If we took one not in the set first, it would decrement the |
| 8460 | * count, possibly to 0 which would cause it to be output as ending the |
| 8461 | * range, and the next time through we would take the same number, and |
| 8462 | * output it again as beginning the next range. By doing it the |
| 8463 | * opposite way, there is no possibility that the count will be |
| 8464 | * momentarily decremented to 0, and thus the two adjoining ranges will |
| 8465 | * be seamlessly merged. (In a tie and both are in the set or both not |
| 8466 | * in the set, it doesn't matter which we take first.) */ |
| 8467 | if (array_a[i_a] < array_b[i_b] |
| 8468 | || (array_a[i_a] == array_b[i_b] |
| 8469 | && ELEMENT_RANGE_MATCHES_INVLIST(i_a))) |
| 8470 | { |
| 8471 | cp_in_set = ELEMENT_RANGE_MATCHES_INVLIST(i_a); |
| 8472 | cp= array_a[i_a++]; |
| 8473 | } |
| 8474 | else { |
| 8475 | cp_in_set = ELEMENT_RANGE_MATCHES_INVLIST(i_b); |
| 8476 | cp = array_b[i_b++]; |
| 8477 | } |
| 8478 | |
| 8479 | /* Here, have chosen which of the two inputs to look at. Only output |
| 8480 | * if the running count changes to/from 0, which marks the |
| 8481 | * beginning/end of a range in that's in the set */ |
| 8482 | if (cp_in_set) { |
| 8483 | if (count == 0) { |
| 8484 | array_u[i_u++] = cp; |
| 8485 | } |
| 8486 | count++; |
| 8487 | } |
| 8488 | else { |
| 8489 | count--; |
| 8490 | if (count == 0) { |
| 8491 | array_u[i_u++] = cp; |
| 8492 | } |
| 8493 | } |
| 8494 | } |
| 8495 | |
| 8496 | /* Here, we are finished going through at least one of the lists, which |
| 8497 | * means there is something remaining in at most one. We check if the list |
| 8498 | * that hasn't been exhausted is positioned such that we are in the middle |
| 8499 | * of a range in its set or not. (i_a and i_b point to the element beyond |
| 8500 | * the one we care about.) If in the set, we decrement 'count'; if 0, there |
| 8501 | * is potentially more to output. |
| 8502 | * There are four cases: |
| 8503 | * 1) Both weren't in their sets, count is 0, and remains 0. What's left |
| 8504 | * in the union is entirely from the non-exhausted set. |
| 8505 | * 2) Both were in their sets, count is 2. Nothing further should |
| 8506 | * be output, as everything that remains will be in the exhausted |
| 8507 | * list's set, hence in the union; decrementing to 1 but not 0 insures |
| 8508 | * that |
| 8509 | * 3) the exhausted was in its set, non-exhausted isn't, count is 1. |
| 8510 | * Nothing further should be output because the union includes |
| 8511 | * everything from the exhausted set. Not decrementing ensures that. |
| 8512 | * 4) the exhausted wasn't in its set, non-exhausted is, count is 1; |
| 8513 | * decrementing to 0 insures that we look at the remainder of the |
| 8514 | * non-exhausted set */ |
| 8515 | if ((i_a != len_a && PREV_RANGE_MATCHES_INVLIST(i_a)) |
| 8516 | || (i_b != len_b && PREV_RANGE_MATCHES_INVLIST(i_b))) |
| 8517 | { |
| 8518 | count--; |
| 8519 | } |
| 8520 | |
| 8521 | /* The final length is what we've output so far, plus what else is about to |
| 8522 | * be output. (If 'count' is non-zero, then the input list we exhausted |
| 8523 | * has everything remaining up to the machine's limit in its set, and hence |
| 8524 | * in the union, so there will be no further output. */ |
| 8525 | len_u = i_u; |
| 8526 | if (count == 0) { |
| 8527 | /* At most one of the subexpressions will be non-zero */ |
| 8528 | len_u += (len_a - i_a) + (len_b - i_b); |
| 8529 | } |
| 8530 | |
| 8531 | /* Set result to final length, which can change the pointer to array_u, so |
| 8532 | * re-find it */ |
| 8533 | if (len_u != _invlist_len(u)) { |
| 8534 | invlist_set_len(u, len_u, *get_invlist_offset_addr(u)); |
| 8535 | invlist_trim(u); |
| 8536 | array_u = invlist_array(u); |
| 8537 | } |
| 8538 | |
| 8539 | /* When 'count' is 0, the list that was exhausted (if one was shorter than |
| 8540 | * the other) ended with everything above it not in its set. That means |
| 8541 | * that the remaining part of the union is precisely the same as the |
| 8542 | * non-exhausted list, so can just copy it unchanged. (If both list were |
| 8543 | * exhausted at the same time, then the operations below will be both 0.) |
| 8544 | */ |
| 8545 | if (count == 0) { |
| 8546 | IV copy_count; /* At most one will have a non-zero copy count */ |
| 8547 | if ((copy_count = len_a - i_a) > 0) { |
| 8548 | Copy(array_a + i_a, array_u + i_u, copy_count, UV); |
| 8549 | } |
| 8550 | else if ((copy_count = len_b - i_b) > 0) { |
| 8551 | Copy(array_b + i_b, array_u + i_u, copy_count, UV); |
| 8552 | } |
| 8553 | } |
| 8554 | |
| 8555 | /* We may be removing a reference to one of the inputs. If so, the output |
| 8556 | * is made mortal if the input was. (Mortal SVs shouldn't have their ref |
| 8557 | * count decremented) */ |
| 8558 | if (a == *output || b == *output) { |
| 8559 | assert(! invlist_is_iterating(*output)); |
| 8560 | if ((SvTEMP(*output))) { |
| 8561 | sv_2mortal(u); |
| 8562 | } |
| 8563 | else { |
| 8564 | SvREFCNT_dec_NN(*output); |
| 8565 | } |
| 8566 | } |
| 8567 | |
| 8568 | *output = u; |
| 8569 | |
| 8570 | return; |
| 8571 | } |
| 8572 | |
| 8573 | void |
| 8574 | Perl__invlist_intersection_maybe_complement_2nd(pTHX_ SV* const a, SV* const b, |
| 8575 | const bool complement_b, SV** i) |
| 8576 | { |
| 8577 | /* Take the intersection of two inversion lists and point <i> to it. *i |
| 8578 | * SHOULD BE DEFINED upon input, and if it points to one of the two lists, |
| 8579 | * the reference count to that list will be decremented if not already a |
| 8580 | * temporary (mortal); otherwise *i will be made correspondingly mortal. |
| 8581 | * The first list, <a>, may be NULL, in which case an empty list is |
| 8582 | * returned. If <complement_b> is TRUE, the result will be the |
| 8583 | * intersection of <a> and the complement (or inversion) of <b> instead of |
| 8584 | * <b> directly. |
| 8585 | * |
| 8586 | * The basis for this comes from "Unicode Demystified" Chapter 13 by |
| 8587 | * Richard Gillam, published by Addison-Wesley, and explained at some |
| 8588 | * length there. The preface says to incorporate its examples into your |
| 8589 | * code at your own risk. In fact, it had bugs |
| 8590 | * |
| 8591 | * The algorithm is like a merge sort, and is essentially the same as the |
| 8592 | * union above |
| 8593 | */ |
| 8594 | |
| 8595 | const UV* array_a; /* a's array */ |
| 8596 | const UV* array_b; |
| 8597 | UV len_a; /* length of a's array */ |
| 8598 | UV len_b; |
| 8599 | |
| 8600 | SV* r; /* the resulting intersection */ |
| 8601 | UV* array_r; |
| 8602 | UV len_r; |
| 8603 | |
| 8604 | UV i_a = 0; /* current index into a's array */ |
| 8605 | UV i_b = 0; |
| 8606 | UV i_r = 0; |
| 8607 | |
| 8608 | /* running count, as explained in the algorithm source book; items are |
| 8609 | * stopped accumulating and are output when the count changes to/from 2. |
| 8610 | * The count is incremented when we start a range that's in the set, and |
| 8611 | * decremented when we start a range that's not in the set. So its range |
| 8612 | * is 0 to 2. Only when the count is 2 is something in the intersection. |
| 8613 | */ |
| 8614 | UV count = 0; |
| 8615 | |
| 8616 | PERL_ARGS_ASSERT__INVLIST_INTERSECTION_MAYBE_COMPLEMENT_2ND; |
| 8617 | assert(a != b); |
| 8618 | |
| 8619 | /* Special case if either one is empty */ |
| 8620 | len_a = (a == NULL) ? 0 : _invlist_len(a); |
| 8621 | if ((len_a == 0) || ((len_b = _invlist_len(b)) == 0)) { |
| 8622 | bool make_temp = FALSE; |
| 8623 | |
| 8624 | if (len_a != 0 && complement_b) { |
| 8625 | |
| 8626 | /* Here, 'a' is not empty, therefore from the above 'if', 'b' must |
| 8627 | * be empty. Here, also we are using 'b's complement, which hence |
| 8628 | * must be every possible code point. Thus the intersection is |
| 8629 | * simply 'a'. */ |
| 8630 | if (*i != a) { |
| 8631 | if (*i == b) { |
| 8632 | if (! (make_temp = cBOOL(SvTEMP(b)))) { |
| 8633 | SvREFCNT_dec_NN(b); |
| 8634 | } |
| 8635 | } |
| 8636 | |
| 8637 | *i = invlist_clone(a); |
| 8638 | } |
| 8639 | /* else *i is already 'a' */ |
| 8640 | |
| 8641 | if (make_temp) { |
| 8642 | sv_2mortal(*i); |
| 8643 | } |
| 8644 | return; |
| 8645 | } |
| 8646 | |
| 8647 | /* Here, 'a' or 'b' is empty and not using the complement of 'b'. The |
| 8648 | * intersection must be empty */ |
| 8649 | if (*i == a) { |
| 8650 | if (! (make_temp = cBOOL(SvTEMP(a)))) { |
| 8651 | SvREFCNT_dec_NN(a); |
| 8652 | } |
| 8653 | } |
| 8654 | else if (*i == b) { |
| 8655 | if (! (make_temp = cBOOL(SvTEMP(b)))) { |
| 8656 | SvREFCNT_dec_NN(b); |
| 8657 | } |
| 8658 | } |
| 8659 | *i = _new_invlist(0); |
| 8660 | if (make_temp) { |
| 8661 | sv_2mortal(*i); |
| 8662 | } |
| 8663 | |
| 8664 | return; |
| 8665 | } |
| 8666 | |
| 8667 | /* Here both lists exist and are non-empty */ |
| 8668 | array_a = invlist_array(a); |
| 8669 | array_b = invlist_array(b); |
| 8670 | |
| 8671 | /* If are to take the intersection of 'a' with the complement of b, set it |
| 8672 | * up so are looking at b's complement. */ |
| 8673 | if (complement_b) { |
| 8674 | |
| 8675 | /* To complement, we invert: if the first element is 0, remove it. To |
| 8676 | * do this, we just pretend the array starts one later */ |
| 8677 | if (array_b[0] == 0) { |
| 8678 | array_b++; |
| 8679 | len_b--; |
| 8680 | } |
| 8681 | else { |
| 8682 | |
| 8683 | /* But if the first element is not zero, we pretend the list starts |
| 8684 | * at the 0 that is always stored immediately before the array. */ |
| 8685 | array_b--; |
| 8686 | len_b++; |
| 8687 | } |
| 8688 | } |
| 8689 | |
| 8690 | /* Size the intersection for the worst case: that the intersection ends up |
| 8691 | * fragmenting everything to be completely disjoint */ |
| 8692 | r= _new_invlist(len_a + len_b); |
| 8693 | |
| 8694 | /* Will contain U+0000 iff both components do */ |
| 8695 | array_r = _invlist_array_init(r, len_a > 0 && array_a[0] == 0 |
| 8696 | && len_b > 0 && array_b[0] == 0); |
| 8697 | |
| 8698 | /* Go through each list item by item, stopping when exhausted one of |
| 8699 | * them */ |
| 8700 | while (i_a < len_a && i_b < len_b) { |
| 8701 | UV cp; /* The element to potentially add to the intersection's |
| 8702 | array */ |
| 8703 | bool cp_in_set; /* Is it in the input list's set or not */ |
| 8704 | |
| 8705 | /* We need to take one or the other of the two inputs for the |
| 8706 | * intersection. Since we are merging two sorted lists, we take the |
| 8707 | * smaller of the next items. In case of a tie, we take the one that |
| 8708 | * is not in its set first (a difference from the union algorithm). If |
| 8709 | * we took one in the set first, it would increment the count, possibly |
| 8710 | * to 2 which would cause it to be output as starting a range in the |
| 8711 | * intersection, and the next time through we would take that same |
| 8712 | * number, and output it again as ending the set. By doing it the |
| 8713 | * opposite of this, there is no possibility that the count will be |
| 8714 | * momentarily incremented to 2. (In a tie and both are in the set or |
| 8715 | * both not in the set, it doesn't matter which we take first.) */ |
| 8716 | if (array_a[i_a] < array_b[i_b] |
| 8717 | || (array_a[i_a] == array_b[i_b] |
| 8718 | && ! ELEMENT_RANGE_MATCHES_INVLIST(i_a))) |
| 8719 | { |
| 8720 | cp_in_set = ELEMENT_RANGE_MATCHES_INVLIST(i_a); |
| 8721 | cp= array_a[i_a++]; |
| 8722 | } |
| 8723 | else { |
| 8724 | cp_in_set = ELEMENT_RANGE_MATCHES_INVLIST(i_b); |
| 8725 | cp= array_b[i_b++]; |
| 8726 | } |
| 8727 | |
| 8728 | /* Here, have chosen which of the two inputs to look at. Only output |
| 8729 | * if the running count changes to/from 2, which marks the |
| 8730 | * beginning/end of a range that's in the intersection */ |
| 8731 | if (cp_in_set) { |
| 8732 | count++; |
| 8733 | if (count == 2) { |
| 8734 | array_r[i_r++] = cp; |
| 8735 | } |
| 8736 | } |
| 8737 | else { |
| 8738 | if (count == 2) { |
| 8739 | array_r[i_r++] = cp; |
| 8740 | } |
| 8741 | count--; |
| 8742 | } |
| 8743 | } |
| 8744 | |
| 8745 | /* Here, we are finished going through at least one of the lists, which |
| 8746 | * means there is something remaining in at most one. We check if the list |
| 8747 | * that has been exhausted is positioned such that we are in the middle |
| 8748 | * of a range in its set or not. (i_a and i_b point to elements 1 beyond |
| 8749 | * the ones we care about.) There are four cases: |
| 8750 | * 1) Both weren't in their sets, count is 0, and remains 0. There's |
| 8751 | * nothing left in the intersection. |
| 8752 | * 2) Both were in their sets, count is 2 and perhaps is incremented to |
| 8753 | * above 2. What should be output is exactly that which is in the |
| 8754 | * non-exhausted set, as everything it has is also in the intersection |
| 8755 | * set, and everything it doesn't have can't be in the intersection |
| 8756 | * 3) The exhausted was in its set, non-exhausted isn't, count is 1, and |
| 8757 | * gets incremented to 2. Like the previous case, the intersection is |
| 8758 | * everything that remains in the non-exhausted set. |
| 8759 | * 4) the exhausted wasn't in its set, non-exhausted is, count is 1, and |
| 8760 | * remains 1. And the intersection has nothing more. */ |
| 8761 | if ((i_a == len_a && PREV_RANGE_MATCHES_INVLIST(i_a)) |
| 8762 | || (i_b == len_b && PREV_RANGE_MATCHES_INVLIST(i_b))) |
| 8763 | { |
| 8764 | count++; |
| 8765 | } |
| 8766 | |
| 8767 | /* The final length is what we've output so far plus what else is in the |
| 8768 | * intersection. At most one of the subexpressions below will be non-zero |
| 8769 | * */ |
| 8770 | len_r = i_r; |
| 8771 | if (count >= 2) { |
| 8772 | len_r += (len_a - i_a) + (len_b - i_b); |
| 8773 | } |
| 8774 | |
| 8775 | /* Set result to final length, which can change the pointer to array_r, so |
| 8776 | * re-find it */ |
| 8777 | if (len_r != _invlist_len(r)) { |
| 8778 | invlist_set_len(r, len_r, *get_invlist_offset_addr(r)); |
| 8779 | invlist_trim(r); |
| 8780 | array_r = invlist_array(r); |
| 8781 | } |
| 8782 | |
| 8783 | /* Finish outputting any remaining */ |
| 8784 | if (count >= 2) { /* At most one will have a non-zero copy count */ |
| 8785 | IV copy_count; |
| 8786 | if ((copy_count = len_a - i_a) > 0) { |
| 8787 | Copy(array_a + i_a, array_r + i_r, copy_count, UV); |
| 8788 | } |
| 8789 | else if ((copy_count = len_b - i_b) > 0) { |
| 8790 | Copy(array_b + i_b, array_r + i_r, copy_count, UV); |
| 8791 | } |
| 8792 | } |
| 8793 | |
| 8794 | /* We may be removing a reference to one of the inputs. If so, the output |
| 8795 | * is made mortal if the input was. (Mortal SVs shouldn't have their ref |
| 8796 | * count decremented) */ |
| 8797 | if (a == *i || b == *i) { |
| 8798 | assert(! invlist_is_iterating(*i)); |
| 8799 | if (SvTEMP(*i)) { |
| 8800 | sv_2mortal(r); |
| 8801 | } |
| 8802 | else { |
| 8803 | SvREFCNT_dec_NN(*i); |
| 8804 | } |
| 8805 | } |
| 8806 | |
| 8807 | *i = r; |
| 8808 | |
| 8809 | return; |
| 8810 | } |
| 8811 | |
| 8812 | SV* |
| 8813 | Perl__add_range_to_invlist(pTHX_ SV* invlist, const UV start, const UV end) |
| 8814 | { |
| 8815 | /* Add the range from 'start' to 'end' inclusive to the inversion list's |
| 8816 | * set. A pointer to the inversion list is returned. This may actually be |
| 8817 | * a new list, in which case the passed in one has been destroyed. The |
| 8818 | * passed in inversion list can be NULL, in which case a new one is created |
| 8819 | * with just the one range in it */ |
| 8820 | |
| 8821 | SV* range_invlist; |
| 8822 | UV len; |
| 8823 | |
| 8824 | if (invlist == NULL) { |
| 8825 | invlist = _new_invlist(2); |
| 8826 | len = 0; |
| 8827 | } |
| 8828 | else { |
| 8829 | len = _invlist_len(invlist); |
| 8830 | } |
| 8831 | |
| 8832 | /* If comes after the final entry actually in the list, can just append it |
| 8833 | * to the end, */ |
| 8834 | if (len == 0 |
| 8835 | || (! ELEMENT_RANGE_MATCHES_INVLIST(len - 1) |
| 8836 | && start >= invlist_array(invlist)[len - 1])) |
| 8837 | { |
| 8838 | _append_range_to_invlist(invlist, start, end); |
| 8839 | return invlist; |
| 8840 | } |
| 8841 | |
| 8842 | /* Here, can't just append things, create and return a new inversion list |
| 8843 | * which is the union of this range and the existing inversion list */ |
| 8844 | range_invlist = _new_invlist(2); |
| 8845 | _append_range_to_invlist(range_invlist, start, end); |
| 8846 | |
| 8847 | _invlist_union(invlist, range_invlist, &invlist); |
| 8848 | |
| 8849 | /* The temporary can be freed */ |
| 8850 | SvREFCNT_dec_NN(range_invlist); |
| 8851 | |
| 8852 | return invlist; |
| 8853 | } |
| 8854 | |
| 8855 | SV* |
| 8856 | Perl__setup_canned_invlist(pTHX_ const STRLEN size, const UV element0, |
| 8857 | UV** other_elements_ptr) |
| 8858 | { |
| 8859 | /* Create and return an inversion list whose contents are to be populated |
| 8860 | * by the caller. The caller gives the number of elements (in 'size') and |
| 8861 | * the very first element ('element0'). This function will set |
| 8862 | * '*other_elements_ptr' to an array of UVs, where the remaining elements |
| 8863 | * are to be placed. |
| 8864 | * |
| 8865 | * Obviously there is some trust involved that the caller will properly |
| 8866 | * fill in the other elements of the array. |
| 8867 | * |
| 8868 | * (The first element needs to be passed in, as the underlying code does |
| 8869 | * things differently depending on whether it is zero or non-zero) */ |
| 8870 | |
| 8871 | SV* invlist = _new_invlist(size); |
| 8872 | bool offset; |
| 8873 | |
| 8874 | PERL_ARGS_ASSERT__SETUP_CANNED_INVLIST; |
| 8875 | |
| 8876 | _append_range_to_invlist(invlist, element0, element0); |
| 8877 | offset = *get_invlist_offset_addr(invlist); |
| 8878 | |
| 8879 | invlist_set_len(invlist, size, offset); |
| 8880 | *other_elements_ptr = invlist_array(invlist) + 1; |
| 8881 | return invlist; |
| 8882 | } |
| 8883 | |
| 8884 | #endif |
| 8885 | |
| 8886 | PERL_STATIC_INLINE SV* |
| 8887 | S_add_cp_to_invlist(pTHX_ SV* invlist, const UV cp) { |
| 8888 | return _add_range_to_invlist(invlist, cp, cp); |
| 8889 | } |
| 8890 | |
| 8891 | #ifndef PERL_IN_XSUB_RE |
| 8892 | void |
| 8893 | Perl__invlist_invert(pTHX_ SV* const invlist) |
| 8894 | { |
| 8895 | /* Complement the input inversion list. This adds a 0 if the list didn't |
| 8896 | * have a zero; removes it otherwise. As described above, the data |
| 8897 | * structure is set up so that this is very efficient */ |
| 8898 | |
| 8899 | PERL_ARGS_ASSERT__INVLIST_INVERT; |
| 8900 | |
| 8901 | assert(! invlist_is_iterating(invlist)); |
| 8902 | |
| 8903 | /* The inverse of matching nothing is matching everything */ |
| 8904 | if (_invlist_len(invlist) == 0) { |
| 8905 | _append_range_to_invlist(invlist, 0, UV_MAX); |
| 8906 | return; |
| 8907 | } |
| 8908 | |
| 8909 | *get_invlist_offset_addr(invlist) = ! *get_invlist_offset_addr(invlist); |
| 8910 | } |
| 8911 | |
| 8912 | #endif |
| 8913 | |
| 8914 | PERL_STATIC_INLINE SV* |
| 8915 | S_invlist_clone(pTHX_ SV* const invlist) |
| 8916 | { |
| 8917 | |
| 8918 | /* Return a new inversion list that is a copy of the input one, which is |
| 8919 | * unchanged. The new list will not be mortal even if the old one was. */ |
| 8920 | |
| 8921 | /* Need to allocate extra space to accommodate Perl's addition of a |
| 8922 | * trailing NUL to SvPV's, since it thinks they are always strings */ |
| 8923 | SV* new_invlist = _new_invlist(_invlist_len(invlist) + 1); |
| 8924 | STRLEN physical_length = SvCUR(invlist); |
| 8925 | bool offset = *(get_invlist_offset_addr(invlist)); |
| 8926 | |
| 8927 | PERL_ARGS_ASSERT_INVLIST_CLONE; |
| 8928 | |
| 8929 | *(get_invlist_offset_addr(new_invlist)) = offset; |
| 8930 | invlist_set_len(new_invlist, _invlist_len(invlist), offset); |
| 8931 | Copy(SvPVX(invlist), SvPVX(new_invlist), physical_length, char); |
| 8932 | |
| 8933 | return new_invlist; |
| 8934 | } |
| 8935 | |
| 8936 | PERL_STATIC_INLINE STRLEN* |
| 8937 | S_get_invlist_iter_addr(SV* invlist) |
| 8938 | { |
| 8939 | /* Return the address of the UV that contains the current iteration |
| 8940 | * position */ |
| 8941 | |
| 8942 | PERL_ARGS_ASSERT_GET_INVLIST_ITER_ADDR; |
| 8943 | |
| 8944 | assert(SvTYPE(invlist) == SVt_INVLIST); |
| 8945 | |
| 8946 | return &(((XINVLIST*) SvANY(invlist))->iterator); |
| 8947 | } |
| 8948 | |
| 8949 | PERL_STATIC_INLINE void |
| 8950 | S_invlist_iterinit(SV* invlist) /* Initialize iterator for invlist */ |
| 8951 | { |
| 8952 | PERL_ARGS_ASSERT_INVLIST_ITERINIT; |
| 8953 | |
| 8954 | *get_invlist_iter_addr(invlist) = 0; |
| 8955 | } |
| 8956 | |
| 8957 | PERL_STATIC_INLINE void |
| 8958 | S_invlist_iterfinish(SV* invlist) |
| 8959 | { |
| 8960 | /* Terminate iterator for invlist. This is to catch development errors. |
| 8961 | * Any iteration that is interrupted before completed should call this |
| 8962 | * function. Functions that add code points anywhere else but to the end |
| 8963 | * of an inversion list assert that they are not in the middle of an |
| 8964 | * iteration. If they were, the addition would make the iteration |
| 8965 | * problematical: if the iteration hadn't reached the place where things |
| 8966 | * were being added, it would be ok */ |
| 8967 | |
| 8968 | PERL_ARGS_ASSERT_INVLIST_ITERFINISH; |
| 8969 | |
| 8970 | *get_invlist_iter_addr(invlist) = (STRLEN) UV_MAX; |
| 8971 | } |
| 8972 | |
| 8973 | STATIC bool |
| 8974 | S_invlist_iternext(SV* invlist, UV* start, UV* end) |
| 8975 | { |
| 8976 | /* An C<invlist_iterinit> call on <invlist> must be used to set this up. |
| 8977 | * This call sets in <*start> and <*end>, the next range in <invlist>. |
| 8978 | * Returns <TRUE> if successful and the next call will return the next |
| 8979 | * range; <FALSE> if was already at the end of the list. If the latter, |
| 8980 | * <*start> and <*end> are unchanged, and the next call to this function |
| 8981 | * will start over at the beginning of the list */ |
| 8982 | |
| 8983 | STRLEN* pos = get_invlist_iter_addr(invlist); |
| 8984 | UV len = _invlist_len(invlist); |
| 8985 | UV *array; |
| 8986 | |
| 8987 | PERL_ARGS_ASSERT_INVLIST_ITERNEXT; |
| 8988 | |
| 8989 | if (*pos >= len) { |
| 8990 | *pos = (STRLEN) UV_MAX; /* Force iterinit() to be required next time */ |
| 8991 | return FALSE; |
| 8992 | } |
| 8993 | |
| 8994 | array = invlist_array(invlist); |
| 8995 | |
| 8996 | *start = array[(*pos)++]; |
| 8997 | |
| 8998 | if (*pos >= len) { |
| 8999 | *end = UV_MAX; |
| 9000 | } |
| 9001 | else { |
| 9002 | *end = array[(*pos)++] - 1; |
| 9003 | } |
| 9004 | |
| 9005 | return TRUE; |
| 9006 | } |
| 9007 | |
| 9008 | PERL_STATIC_INLINE bool |
| 9009 | S_invlist_is_iterating(SV* const invlist) |
| 9010 | { |
| 9011 | PERL_ARGS_ASSERT_INVLIST_IS_ITERATING; |
| 9012 | |
| 9013 | return *(get_invlist_iter_addr(invlist)) < (STRLEN) UV_MAX; |
| 9014 | } |
| 9015 | |
| 9016 | PERL_STATIC_INLINE UV |
| 9017 | S_invlist_highest(SV* const invlist) |
| 9018 | { |
| 9019 | /* Returns the highest code point that matches an inversion list. This API |
| 9020 | * has an ambiguity, as it returns 0 under either the highest is actually |
| 9021 | * 0, or if the list is empty. If this distinction matters to you, check |
| 9022 | * for emptiness before calling this function */ |
| 9023 | |
| 9024 | UV len = _invlist_len(invlist); |
| 9025 | UV *array; |
| 9026 | |
| 9027 | PERL_ARGS_ASSERT_INVLIST_HIGHEST; |
| 9028 | |
| 9029 | if (len == 0) { |
| 9030 | return 0; |
| 9031 | } |
| 9032 | |
| 9033 | array = invlist_array(invlist); |
| 9034 | |
| 9035 | /* The last element in the array in the inversion list always starts a |
| 9036 | * range that goes to infinity. That range may be for code points that are |
| 9037 | * matched in the inversion list, or it may be for ones that aren't |
| 9038 | * matched. In the latter case, the highest code point in the set is one |
| 9039 | * less than the beginning of this range; otherwise it is the final element |
| 9040 | * of this range: infinity */ |
| 9041 | return (ELEMENT_RANGE_MATCHES_INVLIST(len - 1)) |
| 9042 | ? UV_MAX |
| 9043 | : array[len - 1] - 1; |
| 9044 | } |
| 9045 | |
| 9046 | #ifndef PERL_IN_XSUB_RE |
| 9047 | SV * |
| 9048 | Perl__invlist_contents(pTHX_ SV* const invlist) |
| 9049 | { |
| 9050 | /* Get the contents of an inversion list into a string SV so that they can |
| 9051 | * be printed out. It uses the format traditionally done for debug tracing |
| 9052 | */ |
| 9053 | |
| 9054 | UV start, end; |
| 9055 | SV* output = newSVpvs("\n"); |
| 9056 | |
| 9057 | PERL_ARGS_ASSERT__INVLIST_CONTENTS; |
| 9058 | |
| 9059 | assert(! invlist_is_iterating(invlist)); |
| 9060 | |
| 9061 | invlist_iterinit(invlist); |
| 9062 | while (invlist_iternext(invlist, &start, &end)) { |
| 9063 | if (end == UV_MAX) { |
| 9064 | Perl_sv_catpvf(aTHX_ output, "%04"UVXf"\tINFINITY\n", start); |
| 9065 | } |
| 9066 | else if (end != start) { |
| 9067 | Perl_sv_catpvf(aTHX_ output, "%04"UVXf"\t%04"UVXf"\n", |
| 9068 | start, end); |
| 9069 | } |
| 9070 | else { |
| 9071 | Perl_sv_catpvf(aTHX_ output, "%04"UVXf"\n", start); |
| 9072 | } |
| 9073 | } |
| 9074 | |
| 9075 | return output; |
| 9076 | } |
| 9077 | #endif |
| 9078 | |
| 9079 | #ifndef PERL_IN_XSUB_RE |
| 9080 | void |
| 9081 | Perl__invlist_dump(pTHX_ PerlIO *file, I32 level, |
| 9082 | const char * const indent, SV* const invlist) |
| 9083 | { |
| 9084 | /* Designed to be called only by do_sv_dump(). Dumps out the ranges of the |
| 9085 | * inversion list 'invlist' to 'file' at 'level' Each line is prefixed by |
| 9086 | * the string 'indent'. The output looks like this: |
| 9087 | [0] 0x000A .. 0x000D |
| 9088 | [2] 0x0085 |
| 9089 | [4] 0x2028 .. 0x2029 |
| 9090 | [6] 0x3104 .. INFINITY |
| 9091 | * This means that the first range of code points matched by the list are |
| 9092 | * 0xA through 0xD; the second range contains only the single code point |
| 9093 | * 0x85, etc. An inversion list is an array of UVs. Two array elements |
| 9094 | * are used to define each range (except if the final range extends to |
| 9095 | * infinity, only a single element is needed). The array index of the |
| 9096 | * first element for the corresponding range is given in brackets. */ |
| 9097 | |
| 9098 | UV start, end; |
| 9099 | STRLEN count = 0; |
| 9100 | |
| 9101 | PERL_ARGS_ASSERT__INVLIST_DUMP; |
| 9102 | |
| 9103 | if (invlist_is_iterating(invlist)) { |
| 9104 | Perl_dump_indent(aTHX_ level, file, |
| 9105 | "%sCan't dump inversion list because is in middle of iterating\n", |
| 9106 | indent); |
| 9107 | return; |
| 9108 | } |
| 9109 | |
| 9110 | invlist_iterinit(invlist); |
| 9111 | while (invlist_iternext(invlist, &start, &end)) { |
| 9112 | if (end == UV_MAX) { |
| 9113 | Perl_dump_indent(aTHX_ level, file, |
| 9114 | "%s[%"UVuf"] 0x%04"UVXf" .. INFINITY\n", |
| 9115 | indent, (UV)count, start); |
| 9116 | } |
| 9117 | else if (end != start) { |
| 9118 | Perl_dump_indent(aTHX_ level, file, |
| 9119 | "%s[%"UVuf"] 0x%04"UVXf" .. 0x%04"UVXf"\n", |
| 9120 | indent, (UV)count, start, end); |
| 9121 | } |
| 9122 | else { |
| 9123 | Perl_dump_indent(aTHX_ level, file, "%s[%"UVuf"] 0x%04"UVXf"\n", |
| 9124 | indent, (UV)count, start); |
| 9125 | } |
| 9126 | count += 2; |
| 9127 | } |
| 9128 | } |
| 9129 | |
| 9130 | void |
| 9131 | Perl__load_PL_utf8_foldclosures (pTHX) |
| 9132 | { |
| 9133 | assert(! PL_utf8_foldclosures); |
| 9134 | |
| 9135 | /* If the folds haven't been read in, call a fold function |
| 9136 | * to force that */ |
| 9137 | if (! PL_utf8_tofold) { |
| 9138 | U8 dummy[UTF8_MAXBYTES_CASE+1]; |
| 9139 | |
| 9140 | /* This string is just a short named one above \xff */ |
| 9141 | to_utf8_fold((U8*) HYPHEN_UTF8, dummy, NULL); |
| 9142 | assert(PL_utf8_tofold); /* Verify that worked */ |
| 9143 | } |
| 9144 | PL_utf8_foldclosures = _swash_inversion_hash(PL_utf8_tofold); |
| 9145 | } |
| 9146 | #endif |
| 9147 | |
| 9148 | #ifdef PERL_ARGS_ASSERT__INVLISTEQ |
| 9149 | bool |
| 9150 | S__invlistEQ(pTHX_ SV* const a, SV* const b, const bool complement_b) |
| 9151 | { |
| 9152 | /* Return a boolean as to if the two passed in inversion lists are |
| 9153 | * identical. The final argument, if TRUE, says to take the complement of |
| 9154 | * the second inversion list before doing the comparison */ |
| 9155 | |
| 9156 | const UV* array_a = invlist_array(a); |
| 9157 | const UV* array_b = invlist_array(b); |
| 9158 | UV len_a = _invlist_len(a); |
| 9159 | UV len_b = _invlist_len(b); |
| 9160 | |
| 9161 | UV i = 0; /* current index into the arrays */ |
| 9162 | bool retval = TRUE; /* Assume are identical until proven otherwise */ |
| 9163 | |
| 9164 | PERL_ARGS_ASSERT__INVLISTEQ; |
| 9165 | |
| 9166 | /* If are to compare 'a' with the complement of b, set it |
| 9167 | * up so are looking at b's complement. */ |
| 9168 | if (complement_b) { |
| 9169 | |
| 9170 | /* The complement of nothing is everything, so <a> would have to have |
| 9171 | * just one element, starting at zero (ending at infinity) */ |
| 9172 | if (len_b == 0) { |
| 9173 | return (len_a == 1 && array_a[0] == 0); |
| 9174 | } |
| 9175 | else if (array_b[0] == 0) { |
| 9176 | |
| 9177 | /* Otherwise, to complement, we invert. Here, the first element is |
| 9178 | * 0, just remove it. To do this, we just pretend the array starts |
| 9179 | * one later */ |
| 9180 | |
| 9181 | array_b++; |
| 9182 | len_b--; |
| 9183 | } |
| 9184 | else { |
| 9185 | |
| 9186 | /* But if the first element is not zero, we pretend the list starts |
| 9187 | * at the 0 that is always stored immediately before the array. */ |
| 9188 | array_b--; |
| 9189 | len_b++; |
| 9190 | } |
| 9191 | } |
| 9192 | |
| 9193 | /* Make sure that the lengths are the same, as well as the final element |
| 9194 | * before looping through the remainder. (Thus we test the length, final, |
| 9195 | * and first elements right off the bat) */ |
| 9196 | if (len_a != len_b || array_a[len_a-1] != array_b[len_a-1]) { |
| 9197 | retval = FALSE; |
| 9198 | } |
| 9199 | else for (i = 0; i < len_a - 1; i++) { |
| 9200 | if (array_a[i] != array_b[i]) { |
| 9201 | retval = FALSE; |
| 9202 | break; |
| 9203 | } |
| 9204 | } |
| 9205 | |
| 9206 | return retval; |
| 9207 | } |
| 9208 | #endif |
| 9209 | |
| 9210 | #undef HEADER_LENGTH |
| 9211 | #undef TO_INTERNAL_SIZE |
| 9212 | #undef FROM_INTERNAL_SIZE |
| 9213 | #undef INVLIST_VERSION_ID |
| 9214 | |
| 9215 | /* End of inversion list object */ |
| 9216 | |
| 9217 | STATIC void |
| 9218 | S_parse_lparen_question_flags(pTHX_ RExC_state_t *pRExC_state) |
| 9219 | { |
| 9220 | /* This parses the flags that are in either the '(?foo)' or '(?foo:bar)' |
| 9221 | * constructs, and updates RExC_flags with them. On input, RExC_parse |
| 9222 | * should point to the first flag; it is updated on output to point to the |
| 9223 | * final ')' or ':'. There needs to be at least one flag, or this will |
| 9224 | * abort */ |
| 9225 | |
| 9226 | /* for (?g), (?gc), and (?o) warnings; warning |
| 9227 | about (?c) will warn about (?g) -- japhy */ |
| 9228 | |
| 9229 | #define WASTED_O 0x01 |
| 9230 | #define WASTED_G 0x02 |
| 9231 | #define WASTED_C 0x04 |
| 9232 | #define WASTED_GC (WASTED_G|WASTED_C) |
| 9233 | I32 wastedflags = 0x00; |
| 9234 | U32 posflags = 0, negflags = 0; |
| 9235 | U32 *flagsp = &posflags; |
| 9236 | char has_charset_modifier = '\0'; |
| 9237 | regex_charset cs; |
| 9238 | bool has_use_defaults = FALSE; |
| 9239 | const char* const seqstart = RExC_parse - 1; /* Point to the '?' */ |
| 9240 | |
| 9241 | PERL_ARGS_ASSERT_PARSE_LPAREN_QUESTION_FLAGS; |
| 9242 | |
| 9243 | /* '^' as an initial flag sets certain defaults */ |
| 9244 | if (UCHARAT(RExC_parse) == '^') { |
| 9245 | RExC_parse++; |
| 9246 | has_use_defaults = TRUE; |
| 9247 | STD_PMMOD_FLAGS_CLEAR(&RExC_flags); |
| 9248 | set_regex_charset(&RExC_flags, (RExC_utf8 || RExC_uni_semantics) |
| 9249 | ? REGEX_UNICODE_CHARSET |
| 9250 | : REGEX_DEPENDS_CHARSET); |
| 9251 | } |
| 9252 | |
| 9253 | cs = get_regex_charset(RExC_flags); |
| 9254 | if (cs == REGEX_DEPENDS_CHARSET |
| 9255 | && (RExC_utf8 || RExC_uni_semantics)) |
| 9256 | { |
| 9257 | cs = REGEX_UNICODE_CHARSET; |
| 9258 | } |
| 9259 | |
| 9260 | while (*RExC_parse) { |
| 9261 | /* && strchr("iogcmsx", *RExC_parse) */ |
| 9262 | /* (?g), (?gc) and (?o) are useless here |
| 9263 | and must be globally applied -- japhy */ |
| 9264 | switch (*RExC_parse) { |
| 9265 | |
| 9266 | /* Code for the imsx flags */ |
| 9267 | CASE_STD_PMMOD_FLAGS_PARSE_SET(flagsp); |
| 9268 | |
| 9269 | case LOCALE_PAT_MOD: |
| 9270 | if (has_charset_modifier) { |
| 9271 | goto excess_modifier; |
| 9272 | } |
| 9273 | else if (flagsp == &negflags) { |
| 9274 | goto neg_modifier; |
| 9275 | } |
| 9276 | cs = REGEX_LOCALE_CHARSET; |
| 9277 | has_charset_modifier = LOCALE_PAT_MOD; |
| 9278 | break; |
| 9279 | case UNICODE_PAT_MOD: |
| 9280 | if (has_charset_modifier) { |
| 9281 | goto excess_modifier; |
| 9282 | } |
| 9283 | else if (flagsp == &negflags) { |
| 9284 | goto neg_modifier; |
| 9285 | } |
| 9286 | cs = REGEX_UNICODE_CHARSET; |
| 9287 | has_charset_modifier = UNICODE_PAT_MOD; |
| 9288 | break; |
| 9289 | case ASCII_RESTRICT_PAT_MOD: |
| 9290 | if (flagsp == &negflags) { |
| 9291 | goto neg_modifier; |
| 9292 | } |
| 9293 | if (has_charset_modifier) { |
| 9294 | if (cs != REGEX_ASCII_RESTRICTED_CHARSET) { |
| 9295 | goto excess_modifier; |
| 9296 | } |
| 9297 | /* Doubled modifier implies more restricted */ |
| 9298 | cs = REGEX_ASCII_MORE_RESTRICTED_CHARSET; |
| 9299 | } |
| 9300 | else { |
| 9301 | cs = REGEX_ASCII_RESTRICTED_CHARSET; |
| 9302 | } |
| 9303 | has_charset_modifier = ASCII_RESTRICT_PAT_MOD; |
| 9304 | break; |
| 9305 | case DEPENDS_PAT_MOD: |
| 9306 | if (has_use_defaults) { |
| 9307 | goto fail_modifiers; |
| 9308 | } |
| 9309 | else if (flagsp == &negflags) { |
| 9310 | goto neg_modifier; |
| 9311 | } |
| 9312 | else if (has_charset_modifier) { |
| 9313 | goto excess_modifier; |
| 9314 | } |
| 9315 | |
| 9316 | /* The dual charset means unicode semantics if the |
| 9317 | * pattern (or target, not known until runtime) are |
| 9318 | * utf8, or something in the pattern indicates unicode |
| 9319 | * semantics */ |
| 9320 | cs = (RExC_utf8 || RExC_uni_semantics) |
| 9321 | ? REGEX_UNICODE_CHARSET |
| 9322 | : REGEX_DEPENDS_CHARSET; |
| 9323 | has_charset_modifier = DEPENDS_PAT_MOD; |
| 9324 | break; |
| 9325 | excess_modifier: |
| 9326 | RExC_parse++; |
| 9327 | if (has_charset_modifier == ASCII_RESTRICT_PAT_MOD) { |
| 9328 | vFAIL2("Regexp modifier \"%c\" may appear a maximum of twice", ASCII_RESTRICT_PAT_MOD); |
| 9329 | } |
| 9330 | else if (has_charset_modifier == *(RExC_parse - 1)) { |
| 9331 | vFAIL2("Regexp modifier \"%c\" may not appear twice", |
| 9332 | *(RExC_parse - 1)); |
| 9333 | } |
| 9334 | else { |
| 9335 | vFAIL3("Regexp modifiers \"%c\" and \"%c\" are mutually exclusive", has_charset_modifier, *(RExC_parse - 1)); |
| 9336 | } |
| 9337 | /*NOTREACHED*/ |
| 9338 | neg_modifier: |
| 9339 | RExC_parse++; |
| 9340 | vFAIL2("Regexp modifier \"%c\" may not appear after the \"-\"", |
| 9341 | *(RExC_parse - 1)); |
| 9342 | /*NOTREACHED*/ |
| 9343 | case ONCE_PAT_MOD: /* 'o' */ |
| 9344 | case GLOBAL_PAT_MOD: /* 'g' */ |
| 9345 | if (SIZE_ONLY && ckWARN(WARN_REGEXP)) { |
| 9346 | const I32 wflagbit = *RExC_parse == 'o' |
| 9347 | ? WASTED_O |
| 9348 | : WASTED_G; |
| 9349 | if (! (wastedflags & wflagbit) ) { |
| 9350 | wastedflags |= wflagbit; |
| 9351 | /* diag_listed_as: Useless (?-%s) - don't use /%s modifier in regex; marked by <-- HERE in m/%s/ */ |
| 9352 | vWARN5( |
| 9353 | RExC_parse + 1, |
| 9354 | "Useless (%s%c) - %suse /%c modifier", |
| 9355 | flagsp == &negflags ? "?-" : "?", |
| 9356 | *RExC_parse, |
| 9357 | flagsp == &negflags ? "don't " : "", |
| 9358 | *RExC_parse |
| 9359 | ); |
| 9360 | } |
| 9361 | } |
| 9362 | break; |
| 9363 | |
| 9364 | case CONTINUE_PAT_MOD: /* 'c' */ |
| 9365 | if (SIZE_ONLY && ckWARN(WARN_REGEXP)) { |
| 9366 | if (! (wastedflags & WASTED_C) ) { |
| 9367 | wastedflags |= WASTED_GC; |
| 9368 | /* diag_listed_as: Useless (?-%s) - don't use /%s modifier in regex; marked by <-- HERE in m/%s/ */ |
| 9369 | vWARN3( |
| 9370 | RExC_parse + 1, |
| 9371 | "Useless (%sc) - %suse /gc modifier", |
| 9372 | flagsp == &negflags ? "?-" : "?", |
| 9373 | flagsp == &negflags ? "don't " : "" |
| 9374 | ); |
| 9375 | } |
| 9376 | } |
| 9377 | break; |
| 9378 | case KEEPCOPY_PAT_MOD: /* 'p' */ |
| 9379 | if (flagsp == &negflags) { |
| 9380 | if (SIZE_ONLY) |
| 9381 | ckWARNreg(RExC_parse + 1,"Useless use of (?-p)"); |
| 9382 | } else { |
| 9383 | *flagsp |= RXf_PMf_KEEPCOPY; |
| 9384 | } |
| 9385 | break; |
| 9386 | case '-': |
| 9387 | /* A flag is a default iff it is following a minus, so |
| 9388 | * if there is a minus, it means will be trying to |
| 9389 | * re-specify a default which is an error */ |
| 9390 | if (has_use_defaults || flagsp == &negflags) { |
| 9391 | goto fail_modifiers; |
| 9392 | } |
| 9393 | flagsp = &negflags; |
| 9394 | wastedflags = 0; /* reset so (?g-c) warns twice */ |
| 9395 | break; |
| 9396 | case ':': |
| 9397 | case ')': |
| 9398 | RExC_flags |= posflags; |
| 9399 | RExC_flags &= ~negflags; |
| 9400 | set_regex_charset(&RExC_flags, cs); |
| 9401 | if (RExC_flags & RXf_PMf_FOLD) { |
| 9402 | RExC_contains_i = 1; |
| 9403 | } |
| 9404 | return; |
| 9405 | /*NOTREACHED*/ |
| 9406 | default: |
| 9407 | fail_modifiers: |
| 9408 | RExC_parse += UTF ? UTF8SKIP(RExC_parse) : 1; |
| 9409 | /* diag_listed_as: Sequence (?%s...) not recognized in regex; marked by <-- HERE in m/%s/ */ |
| 9410 | vFAIL2utf8f("Sequence (%"UTF8f"...) not recognized", |
| 9411 | UTF8fARG(UTF, RExC_parse-seqstart, seqstart)); |
| 9412 | /*NOTREACHED*/ |
| 9413 | } |
| 9414 | |
| 9415 | ++RExC_parse; |
| 9416 | } |
| 9417 | } |
| 9418 | |
| 9419 | /* |
| 9420 | - reg - regular expression, i.e. main body or parenthesized thing |
| 9421 | * |
| 9422 | * Caller must absorb opening parenthesis. |
| 9423 | * |
| 9424 | * Combining parenthesis handling with the base level of regular expression |
| 9425 | * is a trifle forced, but the need to tie the tails of the branches to what |
| 9426 | * follows makes it hard to avoid. |
| 9427 | */ |
| 9428 | #define REGTAIL(x,y,z) regtail((x),(y),(z),depth+1) |
| 9429 | #ifdef DEBUGGING |
| 9430 | #define REGTAIL_STUDY(x,y,z) regtail_study((x),(y),(z),depth+1) |
| 9431 | #else |
| 9432 | #define REGTAIL_STUDY(x,y,z) regtail((x),(y),(z),depth+1) |
| 9433 | #endif |
| 9434 | |
| 9435 | /* Returns NULL, setting *flagp to TRYAGAIN at the end of (?) that only sets |
| 9436 | flags. Returns NULL, setting *flagp to RESTART_UTF8 if the sizing scan |
| 9437 | needs to be restarted. |
| 9438 | Otherwise would only return NULL if regbranch() returns NULL, which |
| 9439 | cannot happen. */ |
| 9440 | STATIC regnode * |
| 9441 | S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp,U32 depth) |
| 9442 | /* paren: Parenthesized? 0=top; 1,2=inside '(': changed to letter. |
| 9443 | * 2 is like 1, but indicates that nextchar() has been called to advance |
| 9444 | * RExC_parse beyond the '('. Things like '(?' are indivisible tokens, and |
| 9445 | * this flag alerts us to the need to check for that */ |
| 9446 | { |
| 9447 | regnode *ret; /* Will be the head of the group. */ |
| 9448 | regnode *br; |
| 9449 | regnode *lastbr; |
| 9450 | regnode *ender = NULL; |
| 9451 | I32 parno = 0; |
| 9452 | I32 flags; |
| 9453 | U32 oregflags = RExC_flags; |
| 9454 | bool have_branch = 0; |
| 9455 | bool is_open = 0; |
| 9456 | I32 freeze_paren = 0; |
| 9457 | I32 after_freeze = 0; |
| 9458 | I32 num; /* numeric backreferences */ |
| 9459 | |
| 9460 | char * parse_start = RExC_parse; /* MJD */ |
| 9461 | char * const oregcomp_parse = RExC_parse; |
| 9462 | |
| 9463 | GET_RE_DEBUG_FLAGS_DECL; |
| 9464 | |
| 9465 | PERL_ARGS_ASSERT_REG; |
| 9466 | DEBUG_PARSE("reg "); |
| 9467 | |
| 9468 | *flagp = 0; /* Tentatively. */ |
| 9469 | |
| 9470 | |
| 9471 | /* Make an OPEN node, if parenthesized. */ |
| 9472 | if (paren) { |
| 9473 | |
| 9474 | /* Under /x, space and comments can be gobbled up between the '(' and |
| 9475 | * here (if paren ==2). The forms '(*VERB' and '(?...' disallow such |
| 9476 | * intervening space, as the sequence is a token, and a token should be |
| 9477 | * indivisible */ |
| 9478 | bool has_intervening_patws = paren == 2 && *(RExC_parse - 1) != '('; |
| 9479 | |
| 9480 | if ( *RExC_parse == '*') { /* (*VERB:ARG) */ |
| 9481 | char *start_verb = RExC_parse; |
| 9482 | STRLEN verb_len = 0; |
| 9483 | char *start_arg = NULL; |
| 9484 | unsigned char op = 0; |
| 9485 | int argok = 1; |
| 9486 | int internal_argval = 0; /* internal_argval is only useful if |
| 9487 | !argok */ |
| 9488 | |
| 9489 | if (has_intervening_patws) { |
| 9490 | RExC_parse++; |
| 9491 | vFAIL("In '(*VERB...)', the '(' and '*' must be adjacent"); |
| 9492 | } |
| 9493 | while ( *RExC_parse && *RExC_parse != ')' ) { |
| 9494 | if ( *RExC_parse == ':' ) { |
| 9495 | start_arg = RExC_parse + 1; |
| 9496 | break; |
| 9497 | } |
| 9498 | RExC_parse++; |
| 9499 | } |
| 9500 | ++start_verb; |
| 9501 | verb_len = RExC_parse - start_verb; |
| 9502 | if ( start_arg ) { |
| 9503 | RExC_parse++; |
| 9504 | while ( *RExC_parse && *RExC_parse != ')' ) |
| 9505 | RExC_parse++; |
| 9506 | if ( *RExC_parse != ')' ) |
| 9507 | vFAIL("Unterminated verb pattern argument"); |
| 9508 | if ( RExC_parse == start_arg ) |
| 9509 | start_arg = NULL; |
| 9510 | } else { |
| 9511 | if ( *RExC_parse != ')' ) |
| 9512 | vFAIL("Unterminated verb pattern"); |
| 9513 | } |
| 9514 | |
| 9515 | switch ( *start_verb ) { |
| 9516 | case 'A': /* (*ACCEPT) */ |
| 9517 | if ( memEQs(start_verb,verb_len,"ACCEPT") ) { |
| 9518 | op = ACCEPT; |
| 9519 | internal_argval = RExC_nestroot; |
| 9520 | } |
| 9521 | break; |
| 9522 | case 'C': /* (*COMMIT) */ |
| 9523 | if ( memEQs(start_verb,verb_len,"COMMIT") ) |
| 9524 | op = COMMIT; |
| 9525 | break; |
| 9526 | case 'F': /* (*FAIL) */ |
| 9527 | if ( verb_len==1 || memEQs(start_verb,verb_len,"FAIL") ) { |
| 9528 | op = OPFAIL; |
| 9529 | argok = 0; |
| 9530 | } |
| 9531 | break; |
| 9532 | case ':': /* (*:NAME) */ |
| 9533 | case 'M': /* (*MARK:NAME) */ |
| 9534 | if ( verb_len==0 || memEQs(start_verb,verb_len,"MARK") ) { |
| 9535 | op = MARKPOINT; |
| 9536 | argok = -1; |
| 9537 | } |
| 9538 | break; |
| 9539 | case 'P': /* (*PRUNE) */ |
| 9540 | if ( memEQs(start_verb,verb_len,"PRUNE") ) |
| 9541 | op = PRUNE; |
| 9542 | break; |
| 9543 | case 'S': /* (*SKIP) */ |
| 9544 | if ( memEQs(start_verb,verb_len,"SKIP") ) |
| 9545 | op = SKIP; |
| 9546 | break; |
| 9547 | case 'T': /* (*THEN) */ |
| 9548 | /* [19:06] <TimToady> :: is then */ |
| 9549 | if ( memEQs(start_verb,verb_len,"THEN") ) { |
| 9550 | op = CUTGROUP; |
| 9551 | RExC_seen |= REG_CUTGROUP_SEEN; |
| 9552 | } |
| 9553 | break; |
| 9554 | } |
| 9555 | if ( ! op ) { |
| 9556 | RExC_parse += UTF ? UTF8SKIP(RExC_parse) : 1; |
| 9557 | vFAIL2utf8f( |
| 9558 | "Unknown verb pattern '%"UTF8f"'", |
| 9559 | UTF8fARG(UTF, verb_len, start_verb)); |
| 9560 | } |
| 9561 | if ( argok ) { |
| 9562 | if ( start_arg && internal_argval ) { |
| 9563 | vFAIL3("Verb pattern '%.*s' may not have an argument", |
| 9564 | verb_len, start_verb); |
| 9565 | } else if ( argok < 0 && !start_arg ) { |
| 9566 | vFAIL3("Verb pattern '%.*s' has a mandatory argument", |
| 9567 | verb_len, start_verb); |
| 9568 | } else { |
| 9569 | ret = reganode(pRExC_state, op, internal_argval); |
| 9570 | if ( ! internal_argval && ! SIZE_ONLY ) { |
| 9571 | if (start_arg) { |
| 9572 | SV *sv = newSVpvn( start_arg, |
| 9573 | RExC_parse - start_arg); |
| 9574 | ARG(ret) = add_data( pRExC_state, |
| 9575 | STR_WITH_LEN("S")); |
| 9576 | RExC_rxi->data->data[ARG(ret)]=(void*)sv; |
| 9577 | ret->flags = 0; |
| 9578 | } else { |
| 9579 | ret->flags = 1; |
| 9580 | } |
| 9581 | } |
| 9582 | } |
| 9583 | if (!internal_argval) |
| 9584 | RExC_seen |= REG_VERBARG_SEEN; |
| 9585 | } else if ( start_arg ) { |
| 9586 | vFAIL3("Verb pattern '%.*s' may not have an argument", |
| 9587 | verb_len, start_verb); |
| 9588 | } else { |
| 9589 | ret = reg_node(pRExC_state, op); |
| 9590 | } |
| 9591 | nextchar(pRExC_state); |
| 9592 | return ret; |
| 9593 | } |
| 9594 | else if (*RExC_parse == '?') { /* (?...) */ |
| 9595 | bool is_logical = 0; |
| 9596 | const char * const seqstart = RExC_parse; |
| 9597 | const char * endptr; |
| 9598 | if (has_intervening_patws) { |
| 9599 | RExC_parse++; |
| 9600 | vFAIL("In '(?...)', the '(' and '?' must be adjacent"); |
| 9601 | } |
| 9602 | |
| 9603 | RExC_parse++; |
| 9604 | paren = *RExC_parse++; |
| 9605 | ret = NULL; /* For look-ahead/behind. */ |
| 9606 | switch (paren) { |
| 9607 | |
| 9608 | case 'P': /* (?P...) variants for those used to PCRE/Python */ |
| 9609 | paren = *RExC_parse++; |
| 9610 | if ( paren == '<') /* (?P<...>) named capture */ |
| 9611 | goto named_capture; |
| 9612 | else if (paren == '>') { /* (?P>name) named recursion */ |
| 9613 | goto named_recursion; |
| 9614 | } |
| 9615 | else if (paren == '=') { /* (?P=...) named backref */ |
| 9616 | /* this pretty much dupes the code for \k<NAME> in |
| 9617 | * regatom(), if you change this make sure you change that |
| 9618 | * */ |
| 9619 | char* name_start = RExC_parse; |
| 9620 | U32 num = 0; |
| 9621 | SV *sv_dat = reg_scan_name(pRExC_state, |
| 9622 | SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA); |
| 9623 | if (RExC_parse == name_start || *RExC_parse != ')') |
| 9624 | /* diag_listed_as: Sequence ?P=... not terminated in regex; marked by <-- HERE in m/%s/ */ |
| 9625 | vFAIL2("Sequence %.3s... not terminated",parse_start); |
| 9626 | |
| 9627 | if (!SIZE_ONLY) { |
| 9628 | num = add_data( pRExC_state, STR_WITH_LEN("S")); |
| 9629 | RExC_rxi->data->data[num]=(void*)sv_dat; |
| 9630 | SvREFCNT_inc_simple_void(sv_dat); |
| 9631 | } |
| 9632 | RExC_sawback = 1; |
| 9633 | ret = reganode(pRExC_state, |
| 9634 | ((! FOLD) |
| 9635 | ? NREF |
| 9636 | : (ASCII_FOLD_RESTRICTED) |
| 9637 | ? NREFFA |
| 9638 | : (AT_LEAST_UNI_SEMANTICS) |
| 9639 | ? NREFFU |
| 9640 | : (LOC) |
| 9641 | ? NREFFL |
| 9642 | : NREFF), |
| 9643 | num); |
| 9644 | *flagp |= HASWIDTH; |
| 9645 | |
| 9646 | Set_Node_Offset(ret, parse_start+1); |
| 9647 | Set_Node_Cur_Length(ret, parse_start); |
| 9648 | |
| 9649 | nextchar(pRExC_state); |
| 9650 | return ret; |
| 9651 | } |
| 9652 | RExC_parse++; |
| 9653 | /* diag_listed_as: Sequence (?%s...) not recognized in regex; marked by <-- HERE in m/%s/ */ |
| 9654 | vFAIL3("Sequence (%.*s...) not recognized", |
| 9655 | RExC_parse-seqstart, seqstart); |
| 9656 | /*NOTREACHED*/ |
| 9657 | case '<': /* (?<...) */ |
| 9658 | if (*RExC_parse == '!') |
| 9659 | paren = ','; |
| 9660 | else if (*RExC_parse != '=') |
| 9661 | named_capture: |
| 9662 | { /* (?<...>) */ |
| 9663 | char *name_start; |
| 9664 | SV *svname; |
| 9665 | paren= '>'; |
| 9666 | case '\'': /* (?'...') */ |
| 9667 | name_start= RExC_parse; |
| 9668 | svname = reg_scan_name(pRExC_state, |
| 9669 | SIZE_ONLY /* reverse test from the others */ |
| 9670 | ? REG_RSN_RETURN_NAME |
| 9671 | : REG_RSN_RETURN_NULL); |
| 9672 | if (RExC_parse == name_start || *RExC_parse != paren) |
| 9673 | vFAIL2("Sequence (?%c... not terminated", |
| 9674 | paren=='>' ? '<' : paren); |
| 9675 | if (SIZE_ONLY) { |
| 9676 | HE *he_str; |
| 9677 | SV *sv_dat = NULL; |
| 9678 | if (!svname) /* shouldn't happen */ |
| 9679 | Perl_croak(aTHX_ |
| 9680 | "panic: reg_scan_name returned NULL"); |
| 9681 | if (!RExC_paren_names) { |
| 9682 | RExC_paren_names= newHV(); |
| 9683 | sv_2mortal(MUTABLE_SV(RExC_paren_names)); |
| 9684 | #ifdef DEBUGGING |
| 9685 | RExC_paren_name_list= newAV(); |
| 9686 | sv_2mortal(MUTABLE_SV(RExC_paren_name_list)); |
| 9687 | #endif |
| 9688 | } |
| 9689 | he_str = hv_fetch_ent( RExC_paren_names, svname, 1, 0 ); |
| 9690 | if ( he_str ) |
| 9691 | sv_dat = HeVAL(he_str); |
| 9692 | if ( ! sv_dat ) { |
| 9693 | /* croak baby croak */ |
| 9694 | Perl_croak(aTHX_ |
| 9695 | "panic: paren_name hash element allocation failed"); |
| 9696 | } else if ( SvPOK(sv_dat) ) { |
| 9697 | /* (?|...) can mean we have dupes so scan to check |
| 9698 | its already been stored. Maybe a flag indicating |
| 9699 | we are inside such a construct would be useful, |
| 9700 | but the arrays are likely to be quite small, so |
| 9701 | for now we punt -- dmq */ |
| 9702 | IV count = SvIV(sv_dat); |
| 9703 | I32 *pv = (I32*)SvPVX(sv_dat); |
| 9704 | IV i; |
| 9705 | for ( i = 0 ; i < count ; i++ ) { |
| 9706 | if ( pv[i] == RExC_npar ) { |
| 9707 | count = 0; |
| 9708 | break; |
| 9709 | } |
| 9710 | } |
| 9711 | if ( count ) { |
| 9712 | pv = (I32*)SvGROW(sv_dat, |
| 9713 | SvCUR(sv_dat) + sizeof(I32)+1); |
| 9714 | SvCUR_set(sv_dat, SvCUR(sv_dat) + sizeof(I32)); |
| 9715 | pv[count] = RExC_npar; |
| 9716 | SvIV_set(sv_dat, SvIVX(sv_dat) + 1); |
| 9717 | } |
| 9718 | } else { |
| 9719 | (void)SvUPGRADE(sv_dat,SVt_PVNV); |
| 9720 | sv_setpvn(sv_dat, (char *)&(RExC_npar), |
| 9721 | sizeof(I32)); |
| 9722 | SvIOK_on(sv_dat); |
| 9723 | SvIV_set(sv_dat, 1); |
| 9724 | } |
| 9725 | #ifdef DEBUGGING |
| 9726 | /* Yes this does cause a memory leak in debugging Perls |
| 9727 | * */ |
| 9728 | if (!av_store(RExC_paren_name_list, |
| 9729 | RExC_npar, SvREFCNT_inc(svname))) |
| 9730 | SvREFCNT_dec_NN(svname); |
| 9731 | #endif |
| 9732 | |
| 9733 | /*sv_dump(sv_dat);*/ |
| 9734 | } |
| 9735 | nextchar(pRExC_state); |
| 9736 | paren = 1; |
| 9737 | goto capturing_parens; |
| 9738 | } |
| 9739 | RExC_seen |= REG_LOOKBEHIND_SEEN; |
| 9740 | RExC_in_lookbehind++; |
| 9741 | RExC_parse++; |
| 9742 | /* FALLTHROUGH */ |
| 9743 | case '=': /* (?=...) */ |
| 9744 | RExC_seen_zerolen++; |
| 9745 | break; |
| 9746 | case '!': /* (?!...) */ |
| 9747 | RExC_seen_zerolen++; |
| 9748 | if (*RExC_parse == ')') { |
| 9749 | ret=reg_node(pRExC_state, OPFAIL); |
| 9750 | nextchar(pRExC_state); |
| 9751 | return ret; |
| 9752 | } |
| 9753 | break; |
| 9754 | case '|': /* (?|...) */ |
| 9755 | /* branch reset, behave like a (?:...) except that |
| 9756 | buffers in alternations share the same numbers */ |
| 9757 | paren = ':'; |
| 9758 | after_freeze = freeze_paren = RExC_npar; |
| 9759 | break; |
| 9760 | case ':': /* (?:...) */ |
| 9761 | case '>': /* (?>...) */ |
| 9762 | break; |
| 9763 | case '$': /* (?$...) */ |
| 9764 | case '@': /* (?@...) */ |
| 9765 | vFAIL2("Sequence (?%c...) not implemented", (int)paren); |
| 9766 | break; |
| 9767 | case '0' : /* (?0) */ |
| 9768 | case 'R' : /* (?R) */ |
| 9769 | if (*RExC_parse != ')') |
| 9770 | FAIL("Sequence (?R) not terminated"); |
| 9771 | ret = reg_node(pRExC_state, GOSTART); |
| 9772 | RExC_seen |= REG_GOSTART_SEEN; |
| 9773 | *flagp |= POSTPONED; |
| 9774 | nextchar(pRExC_state); |
| 9775 | return ret; |
| 9776 | /*notreached*/ |
| 9777 | /* named and numeric backreferences */ |
| 9778 | case '&': /* (?&NAME) */ |
| 9779 | parse_start = RExC_parse - 1; |
| 9780 | named_recursion: |
| 9781 | { |
| 9782 | SV *sv_dat = reg_scan_name(pRExC_state, |
| 9783 | SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA); |
| 9784 | num = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0; |
| 9785 | } |
| 9786 | if (RExC_parse == RExC_end || *RExC_parse != ')') |
| 9787 | vFAIL("Sequence (?&... not terminated"); |
| 9788 | goto gen_recurse_regop; |
| 9789 | assert(0); /* NOT REACHED */ |
| 9790 | case '+': |
| 9791 | if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) { |
| 9792 | RExC_parse++; |
| 9793 | vFAIL("Illegal pattern"); |
| 9794 | } |
| 9795 | goto parse_recursion; |
| 9796 | /* NOT REACHED*/ |
| 9797 | case '-': /* (?-1) */ |
| 9798 | if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) { |
| 9799 | RExC_parse--; /* rewind to let it be handled later */ |
| 9800 | goto parse_flags; |
| 9801 | } |
| 9802 | /* FALLTHROUGH */ |
| 9803 | case '1': case '2': case '3': case '4': /* (?1) */ |
| 9804 | case '5': case '6': case '7': case '8': case '9': |
| 9805 | RExC_parse--; |
| 9806 | parse_recursion: |
| 9807 | { |
| 9808 | bool is_neg = FALSE; |
| 9809 | parse_start = RExC_parse - 1; /* MJD */ |
| 9810 | if (*RExC_parse == '-') { |
| 9811 | RExC_parse++; |
| 9812 | is_neg = TRUE; |
| 9813 | } |
| 9814 | num = grok_atou(RExC_parse, &endptr); |
| 9815 | if (endptr) |
| 9816 | RExC_parse = (char*)endptr; |
| 9817 | if (is_neg) { |
| 9818 | /* Some limit for num? */ |
| 9819 | num = -num; |
| 9820 | } |
| 9821 | } |
| 9822 | if (*RExC_parse!=')') |
| 9823 | vFAIL("Expecting close bracket"); |
| 9824 | |
| 9825 | gen_recurse_regop: |
| 9826 | if ( paren == '-' ) { |
| 9827 | /* |
| 9828 | Diagram of capture buffer numbering. |
| 9829 | Top line is the normal capture buffer numbers |
| 9830 | Bottom line is the negative indexing as from |
| 9831 | the X (the (?-2)) |
| 9832 | |
| 9833 | + 1 2 3 4 5 X 6 7 |
| 9834 | /(a(x)y)(a(b(c(?-2)d)e)f)(g(h))/ |
| 9835 | - 5 4 3 2 1 X x x |
| 9836 | |
| 9837 | */ |
| 9838 | num = RExC_npar + num; |
| 9839 | if (num < 1) { |
| 9840 | RExC_parse++; |
| 9841 | vFAIL("Reference to nonexistent group"); |
| 9842 | } |
| 9843 | } else if ( paren == '+' ) { |
| 9844 | num = RExC_npar + num - 1; |
| 9845 | } |
| 9846 | |
| 9847 | ret = reganode(pRExC_state, GOSUB, num); |
| 9848 | if (!SIZE_ONLY) { |
| 9849 | if (num > (I32)RExC_rx->nparens) { |
| 9850 | RExC_parse++; |
| 9851 | vFAIL("Reference to nonexistent group"); |
| 9852 | } |
| 9853 | ARG2L_SET( ret, RExC_recurse_count++); |
| 9854 | RExC_emit++; |
| 9855 | DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log, |
| 9856 | "Recurse #%"UVuf" to %"IVdf"\n", |
| 9857 | (UV)ARG(ret), (IV)ARG2L(ret))); |
| 9858 | } else { |
| 9859 | RExC_size++; |
| 9860 | } |
| 9861 | RExC_seen |= REG_RECURSE_SEEN; |
| 9862 | Set_Node_Length(ret, 1 + regarglen[OP(ret)]); /* MJD */ |
| 9863 | Set_Node_Offset(ret, parse_start); /* MJD */ |
| 9864 | |
| 9865 | *flagp |= POSTPONED; |
| 9866 | nextchar(pRExC_state); |
| 9867 | return ret; |
| 9868 | |
| 9869 | assert(0); /* NOT REACHED */ |
| 9870 | |
| 9871 | case '?': /* (??...) */ |
| 9872 | is_logical = 1; |
| 9873 | if (*RExC_parse != '{') { |
| 9874 | RExC_parse++; |
| 9875 | /* diag_listed_as: Sequence (?%s...) not recognized in regex; marked by <-- HERE in m/%s/ */ |
| 9876 | vFAIL2utf8f( |
| 9877 | "Sequence (%"UTF8f"...) not recognized", |
| 9878 | UTF8fARG(UTF, RExC_parse-seqstart, seqstart)); |
| 9879 | /*NOTREACHED*/ |
| 9880 | } |
| 9881 | *flagp |= POSTPONED; |
| 9882 | paren = *RExC_parse++; |
| 9883 | /* FALLTHROUGH */ |
| 9884 | case '{': /* (?{...}) */ |
| 9885 | { |
| 9886 | U32 n = 0; |
| 9887 | struct reg_code_block *cb; |
| 9888 | |
| 9889 | RExC_seen_zerolen++; |
| 9890 | |
| 9891 | if ( !pRExC_state->num_code_blocks |
| 9892 | || pRExC_state->code_index >= pRExC_state->num_code_blocks |
| 9893 | || pRExC_state->code_blocks[pRExC_state->code_index].start |
| 9894 | != (STRLEN)((RExC_parse -3 - (is_logical ? 1 : 0)) |
| 9895 | - RExC_start) |
| 9896 | ) { |
| 9897 | if (RExC_pm_flags & PMf_USE_RE_EVAL) |
| 9898 | FAIL("panic: Sequence (?{...}): no code block found\n"); |
| 9899 | FAIL("Eval-group not allowed at runtime, use re 'eval'"); |
| 9900 | } |
| 9901 | /* this is a pre-compiled code block (?{...}) */ |
| 9902 | cb = &pRExC_state->code_blocks[pRExC_state->code_index]; |
| 9903 | RExC_parse = RExC_start + cb->end; |
| 9904 | if (!SIZE_ONLY) { |
| 9905 | OP *o = cb->block; |
| 9906 | if (cb->src_regex) { |
| 9907 | n = add_data(pRExC_state, STR_WITH_LEN("rl")); |
| 9908 | RExC_rxi->data->data[n] = |
| 9909 | (void*)SvREFCNT_inc((SV*)cb->src_regex); |
| 9910 | RExC_rxi->data->data[n+1] = (void*)o; |
| 9911 | } |
| 9912 | else { |
| 9913 | n = add_data(pRExC_state, |
| 9914 | (RExC_pm_flags & PMf_HAS_CV) ? "L" : "l", 1); |
| 9915 | RExC_rxi->data->data[n] = (void*)o; |
| 9916 | } |
| 9917 | } |
| 9918 | pRExC_state->code_index++; |
| 9919 | nextchar(pRExC_state); |
| 9920 | |
| 9921 | if (is_logical) { |
| 9922 | regnode *eval; |
| 9923 | ret = reg_node(pRExC_state, LOGICAL); |
| 9924 | eval = reganode(pRExC_state, EVAL, n); |
| 9925 | if (!SIZE_ONLY) { |
| 9926 | ret->flags = 2; |
| 9927 | /* for later propagation into (??{}) return value */ |
| 9928 | eval->flags = (U8) (RExC_flags & RXf_PMf_COMPILETIME); |
| 9929 | } |
| 9930 | REGTAIL(pRExC_state, ret, eval); |
| 9931 | /* deal with the length of this later - MJD */ |
| 9932 | return ret; |
| 9933 | } |
| 9934 | ret = reganode(pRExC_state, EVAL, n); |
| 9935 | Set_Node_Length(ret, RExC_parse - parse_start + 1); |
| 9936 | Set_Node_Offset(ret, parse_start); |
| 9937 | return ret; |
| 9938 | } |
| 9939 | case '(': /* (?(?{...})...) and (?(?=...)...) */ |
| 9940 | { |
| 9941 | int is_define= 0; |
| 9942 | if (RExC_parse[0] == '?') { /* (?(?...)) */ |
| 9943 | if (RExC_parse[1] == '=' || RExC_parse[1] == '!' |
| 9944 | || RExC_parse[1] == '<' |
| 9945 | || RExC_parse[1] == '{') { /* Lookahead or eval. */ |
| 9946 | I32 flag; |
| 9947 | regnode *tail; |
| 9948 | |
| 9949 | ret = reg_node(pRExC_state, LOGICAL); |
| 9950 | if (!SIZE_ONLY) |
| 9951 | ret->flags = 1; |
| 9952 | |
| 9953 | tail = reg(pRExC_state, 1, &flag, depth+1); |
| 9954 | if (flag & RESTART_UTF8) { |
| 9955 | *flagp = RESTART_UTF8; |
| 9956 | return NULL; |
| 9957 | } |
| 9958 | REGTAIL(pRExC_state, ret, tail); |
| 9959 | goto insert_if; |
| 9960 | } |
| 9961 | /* Fall through to ‘Unknown switch condition’ at the |
| 9962 | end of the if/else chain. */ |
| 9963 | } |
| 9964 | else if ( RExC_parse[0] == '<' /* (?(<NAME>)...) */ |
| 9965 | || RExC_parse[0] == '\'' ) /* (?('NAME')...) */ |
| 9966 | { |
| 9967 | char ch = RExC_parse[0] == '<' ? '>' : '\''; |
| 9968 | char *name_start= RExC_parse++; |
| 9969 | U32 num = 0; |
| 9970 | SV *sv_dat=reg_scan_name(pRExC_state, |
| 9971 | SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA); |
| 9972 | if (RExC_parse == name_start || *RExC_parse != ch) |
| 9973 | vFAIL2("Sequence (?(%c... not terminated", |
| 9974 | (ch == '>' ? '<' : ch)); |
| 9975 | RExC_parse++; |
| 9976 | if (!SIZE_ONLY) { |
| 9977 | num = add_data( pRExC_state, STR_WITH_LEN("S")); |
| 9978 | RExC_rxi->data->data[num]=(void*)sv_dat; |
| 9979 | SvREFCNT_inc_simple_void(sv_dat); |
| 9980 | } |
| 9981 | ret = reganode(pRExC_state,NGROUPP,num); |
| 9982 | goto insert_if_check_paren; |
| 9983 | } |
| 9984 | else if (RExC_parse[0] == 'D' && |
| 9985 | RExC_parse[1] == 'E' && |
| 9986 | RExC_parse[2] == 'F' && |
| 9987 | RExC_parse[3] == 'I' && |
| 9988 | RExC_parse[4] == 'N' && |
| 9989 | RExC_parse[5] == 'E') |
| 9990 | { |
| 9991 | ret = reganode(pRExC_state,DEFINEP,0); |
| 9992 | RExC_parse +=6 ; |
| 9993 | is_define = 1; |
| 9994 | goto insert_if_check_paren; |
| 9995 | } |
| 9996 | else if (RExC_parse[0] == 'R') { |
| 9997 | RExC_parse++; |
| 9998 | parno = 0; |
| 9999 | if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) { |
| 10000 | parno = grok_atou(RExC_parse, &endptr); |
| 10001 | if (endptr) |
| 10002 | RExC_parse = (char*)endptr; |
| 10003 | } else if (RExC_parse[0] == '&') { |
| 10004 | SV *sv_dat; |
| 10005 | RExC_parse++; |
| 10006 | sv_dat = reg_scan_name(pRExC_state, |
| 10007 | SIZE_ONLY |
| 10008 | ? REG_RSN_RETURN_NULL |
| 10009 | : REG_RSN_RETURN_DATA); |
| 10010 | parno = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0; |
| 10011 | } |
| 10012 | ret = reganode(pRExC_state,INSUBP,parno); |
| 10013 | goto insert_if_check_paren; |
| 10014 | } |
| 10015 | else if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) { |
| 10016 | /* (?(1)...) */ |
| 10017 | char c; |
| 10018 | char *tmp; |
| 10019 | parno = grok_atou(RExC_parse, &endptr); |
| 10020 | if (endptr) |
| 10021 | RExC_parse = (char*)endptr; |
| 10022 | ret = reganode(pRExC_state, GROUPP, parno); |
| 10023 | |
| 10024 | insert_if_check_paren: |
| 10025 | if (*(tmp = nextchar(pRExC_state)) != ')') { |
| 10026 | /* nextchar also skips comments, so undo its work |
| 10027 | * and skip over the the next character. |
| 10028 | */ |
| 10029 | RExC_parse = tmp; |
| 10030 | RExC_parse += UTF ? UTF8SKIP(RExC_parse) : 1; |
| 10031 | vFAIL("Switch condition not recognized"); |
| 10032 | } |
| 10033 | insert_if: |
| 10034 | REGTAIL(pRExC_state, ret, reganode(pRExC_state, IFTHEN, 0)); |
| 10035 | br = regbranch(pRExC_state, &flags, 1,depth+1); |
| 10036 | if (br == NULL) { |
| 10037 | if (flags & RESTART_UTF8) { |
| 10038 | *flagp = RESTART_UTF8; |
| 10039 | return NULL; |
| 10040 | } |
| 10041 | FAIL2("panic: regbranch returned NULL, flags=%#"UVxf"", |
| 10042 | (UV) flags); |
| 10043 | } else |
| 10044 | REGTAIL(pRExC_state, br, reganode(pRExC_state, |
| 10045 | LONGJMP, 0)); |
| 10046 | c = *nextchar(pRExC_state); |
| 10047 | if (flags&HASWIDTH) |
| 10048 | *flagp |= HASWIDTH; |
| 10049 | if (c == '|') { |
| 10050 | if (is_define) |
| 10051 | vFAIL("(?(DEFINE)....) does not allow branches"); |
| 10052 | |
| 10053 | /* Fake one for optimizer. */ |
| 10054 | lastbr = reganode(pRExC_state, IFTHEN, 0); |
| 10055 | |
| 10056 | if (!regbranch(pRExC_state, &flags, 1,depth+1)) { |
| 10057 | if (flags & RESTART_UTF8) { |
| 10058 | *flagp = RESTART_UTF8; |
| 10059 | return NULL; |
| 10060 | } |
| 10061 | FAIL2("panic: regbranch returned NULL, flags=%#"UVxf"", |
| 10062 | (UV) flags); |
| 10063 | } |
| 10064 | REGTAIL(pRExC_state, ret, lastbr); |
| 10065 | if (flags&HASWIDTH) |
| 10066 | *flagp |= HASWIDTH; |
| 10067 | c = *nextchar(pRExC_state); |
| 10068 | } |
| 10069 | else |
| 10070 | lastbr = NULL; |
| 10071 | if (c != ')') |
| 10072 | vFAIL("Switch (?(condition)... contains too many branches"); |
| 10073 | ender = reg_node(pRExC_state, TAIL); |
| 10074 | REGTAIL(pRExC_state, br, ender); |
| 10075 | if (lastbr) { |
| 10076 | REGTAIL(pRExC_state, lastbr, ender); |
| 10077 | REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); |
| 10078 | } |
| 10079 | else |
| 10080 | REGTAIL(pRExC_state, ret, ender); |
| 10081 | RExC_size++; /* XXX WHY do we need this?!! |
| 10082 | For large programs it seems to be required |
| 10083 | but I can't figure out why. -- dmq*/ |
| 10084 | return ret; |
| 10085 | } |
| 10086 | RExC_parse += UTF ? UTF8SKIP(RExC_parse) : 1; |
| 10087 | vFAIL("Unknown switch condition (?(...))"); |
| 10088 | } |
| 10089 | case '[': /* (?[ ... ]) */ |
| 10090 | return handle_regex_sets(pRExC_state, NULL, flagp, depth, |
| 10091 | oregcomp_parse); |
| 10092 | case 0: |
| 10093 | RExC_parse--; /* for vFAIL to print correctly */ |
| 10094 | vFAIL("Sequence (? incomplete"); |
| 10095 | break; |
| 10096 | default: /* e.g., (?i) */ |
| 10097 | --RExC_parse; |
| 10098 | parse_flags: |
| 10099 | parse_lparen_question_flags(pRExC_state); |
| 10100 | if (UCHARAT(RExC_parse) != ':') { |
| 10101 | nextchar(pRExC_state); |
| 10102 | *flagp = TRYAGAIN; |
| 10103 | return NULL; |
| 10104 | } |
| 10105 | paren = ':'; |
| 10106 | nextchar(pRExC_state); |
| 10107 | ret = NULL; |
| 10108 | goto parse_rest; |
| 10109 | } /* end switch */ |
| 10110 | } |
| 10111 | else { /* (...) */ |
| 10112 | capturing_parens: |
| 10113 | parno = RExC_npar; |
| 10114 | RExC_npar++; |
| 10115 | |
| 10116 | ret = reganode(pRExC_state, OPEN, parno); |
| 10117 | if (!SIZE_ONLY ){ |
| 10118 | if (!RExC_nestroot) |
| 10119 | RExC_nestroot = parno; |
| 10120 | if (RExC_seen & REG_RECURSE_SEEN |
| 10121 | && !RExC_open_parens[parno-1]) |
| 10122 | { |
| 10123 | DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log, |
| 10124 | "Setting open paren #%"IVdf" to %d\n", |
| 10125 | (IV)parno, REG_NODE_NUM(ret))); |
| 10126 | RExC_open_parens[parno-1]= ret; |
| 10127 | } |
| 10128 | } |
| 10129 | Set_Node_Length(ret, 1); /* MJD */ |
| 10130 | Set_Node_Offset(ret, RExC_parse); /* MJD */ |
| 10131 | is_open = 1; |
| 10132 | } |
| 10133 | } |
| 10134 | else /* ! paren */ |
| 10135 | ret = NULL; |
| 10136 | |
| 10137 | parse_rest: |
| 10138 | /* Pick up the branches, linking them together. */ |
| 10139 | parse_start = RExC_parse; /* MJD */ |
| 10140 | br = regbranch(pRExC_state, &flags, 1,depth+1); |
| 10141 | |
| 10142 | /* branch_len = (paren != 0); */ |
| 10143 | |
| 10144 | if (br == NULL) { |
| 10145 | if (flags & RESTART_UTF8) { |
| 10146 | *flagp = RESTART_UTF8; |
| 10147 | return NULL; |
| 10148 | } |
| 10149 | FAIL2("panic: regbranch returned NULL, flags=%#"UVxf"", (UV) flags); |
| 10150 | } |
| 10151 | if (*RExC_parse == '|') { |
| 10152 | if (!SIZE_ONLY && RExC_extralen) { |
| 10153 | reginsert(pRExC_state, BRANCHJ, br, depth+1); |
| 10154 | } |
| 10155 | else { /* MJD */ |
| 10156 | reginsert(pRExC_state, BRANCH, br, depth+1); |
| 10157 | Set_Node_Length(br, paren != 0); |
| 10158 | Set_Node_Offset_To_R(br-RExC_emit_start, parse_start-RExC_start); |
| 10159 | } |
| 10160 | have_branch = 1; |
| 10161 | if (SIZE_ONLY) |
| 10162 | RExC_extralen += 1; /* For BRANCHJ-BRANCH. */ |
| 10163 | } |
| 10164 | else if (paren == ':') { |
| 10165 | *flagp |= flags&SIMPLE; |
| 10166 | } |
| 10167 | if (is_open) { /* Starts with OPEN. */ |
| 10168 | REGTAIL(pRExC_state, ret, br); /* OPEN -> first. */ |
| 10169 | } |
| 10170 | else if (paren != '?') /* Not Conditional */ |
| 10171 | ret = br; |
| 10172 | *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED); |
| 10173 | lastbr = br; |
| 10174 | while (*RExC_parse == '|') { |
| 10175 | if (!SIZE_ONLY && RExC_extralen) { |
| 10176 | ender = reganode(pRExC_state, LONGJMP,0); |
| 10177 | |
| 10178 | /* Append to the previous. */ |
| 10179 | REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); |
| 10180 | } |
| 10181 | if (SIZE_ONLY) |
| 10182 | RExC_extralen += 2; /* Account for LONGJMP. */ |
| 10183 | nextchar(pRExC_state); |
| 10184 | if (freeze_paren) { |
| 10185 | if (RExC_npar > after_freeze) |
| 10186 | after_freeze = RExC_npar; |
| 10187 | RExC_npar = freeze_paren; |
| 10188 | } |
| 10189 | br = regbranch(pRExC_state, &flags, 0, depth+1); |
| 10190 | |
| 10191 | if (br == NULL) { |
| 10192 | if (flags & RESTART_UTF8) { |
| 10193 | *flagp = RESTART_UTF8; |
| 10194 | return NULL; |
| 10195 | } |
| 10196 | FAIL2("panic: regbranch returned NULL, flags=%#"UVxf"", (UV) flags); |
| 10197 | } |
| 10198 | REGTAIL(pRExC_state, lastbr, br); /* BRANCH -> BRANCH. */ |
| 10199 | lastbr = br; |
| 10200 | *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED); |
| 10201 | } |
| 10202 | |
| 10203 | if (have_branch || paren != ':') { |
| 10204 | /* Make a closing node, and hook it on the end. */ |
| 10205 | switch (paren) { |
| 10206 | case ':': |
| 10207 | ender = reg_node(pRExC_state, TAIL); |
| 10208 | break; |
| 10209 | case 1: case 2: |
| 10210 | ender = reganode(pRExC_state, CLOSE, parno); |
| 10211 | if (!SIZE_ONLY && RExC_seen & REG_RECURSE_SEEN) { |
| 10212 | DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log, |
| 10213 | "Setting close paren #%"IVdf" to %d\n", |
| 10214 | (IV)parno, REG_NODE_NUM(ender))); |
| 10215 | RExC_close_parens[parno-1]= ender; |
| 10216 | if (RExC_nestroot == parno) |
| 10217 | RExC_nestroot = 0; |
| 10218 | } |
| 10219 | Set_Node_Offset(ender,RExC_parse+1); /* MJD */ |
| 10220 | Set_Node_Length(ender,1); /* MJD */ |
| 10221 | break; |
| 10222 | case '<': |
| 10223 | case ',': |
| 10224 | case '=': |
| 10225 | case '!': |
| 10226 | *flagp &= ~HASWIDTH; |
| 10227 | /* FALLTHROUGH */ |
| 10228 | case '>': |
| 10229 | ender = reg_node(pRExC_state, SUCCEED); |
| 10230 | break; |
| 10231 | case 0: |
| 10232 | ender = reg_node(pRExC_state, END); |
| 10233 | if (!SIZE_ONLY) { |
| 10234 | assert(!RExC_opend); /* there can only be one! */ |
| 10235 | RExC_opend = ender; |
| 10236 | } |
| 10237 | break; |
| 10238 | } |
| 10239 | DEBUG_PARSE_r(if (!SIZE_ONLY) { |
| 10240 | SV * const mysv_val1=sv_newmortal(); |
| 10241 | SV * const mysv_val2=sv_newmortal(); |
| 10242 | DEBUG_PARSE_MSG("lsbr"); |
| 10243 | regprop(RExC_rx, mysv_val1, lastbr, NULL); |
| 10244 | regprop(RExC_rx, mysv_val2, ender, NULL); |
| 10245 | PerlIO_printf(Perl_debug_log, "~ tying lastbr %s (%"IVdf") to ender %s (%"IVdf") offset %"IVdf"\n", |
| 10246 | SvPV_nolen_const(mysv_val1), |
| 10247 | (IV)REG_NODE_NUM(lastbr), |
| 10248 | SvPV_nolen_const(mysv_val2), |
| 10249 | (IV)REG_NODE_NUM(ender), |
| 10250 | (IV)(ender - lastbr) |
| 10251 | ); |
| 10252 | }); |
| 10253 | REGTAIL(pRExC_state, lastbr, ender); |
| 10254 | |
| 10255 | if (have_branch && !SIZE_ONLY) { |
| 10256 | char is_nothing= 1; |
| 10257 | if (depth==1) |
| 10258 | RExC_seen |= REG_TOP_LEVEL_BRANCHES_SEEN; |
| 10259 | |
| 10260 | /* Hook the tails of the branches to the closing node. */ |
| 10261 | for (br = ret; br; br = regnext(br)) { |
| 10262 | const U8 op = PL_regkind[OP(br)]; |
| 10263 | if (op == BRANCH) { |
| 10264 | REGTAIL_STUDY(pRExC_state, NEXTOPER(br), ender); |
| 10265 | if ( OP(NEXTOPER(br)) != NOTHING |
| 10266 | || regnext(NEXTOPER(br)) != ender) |
| 10267 | is_nothing= 0; |
| 10268 | } |
| 10269 | else if (op == BRANCHJ) { |
| 10270 | REGTAIL_STUDY(pRExC_state, NEXTOPER(NEXTOPER(br)), ender); |
| 10271 | /* for now we always disable this optimisation * / |
| 10272 | if ( OP(NEXTOPER(NEXTOPER(br))) != NOTHING |
| 10273 | || regnext(NEXTOPER(NEXTOPER(br))) != ender) |
| 10274 | */ |
| 10275 | is_nothing= 0; |
| 10276 | } |
| 10277 | } |
| 10278 | if (is_nothing) { |
| 10279 | br= PL_regkind[OP(ret)] != BRANCH ? regnext(ret) : ret; |
| 10280 | DEBUG_PARSE_r(if (!SIZE_ONLY) { |
| 10281 | SV * const mysv_val1=sv_newmortal(); |
| 10282 | SV * const mysv_val2=sv_newmortal(); |
| 10283 | DEBUG_PARSE_MSG("NADA"); |
| 10284 | regprop(RExC_rx, mysv_val1, ret, NULL); |
| 10285 | regprop(RExC_rx, mysv_val2, ender, NULL); |
| 10286 | PerlIO_printf(Perl_debug_log, "~ converting ret %s (%"IVdf") to ender %s (%"IVdf") offset %"IVdf"\n", |
| 10287 | SvPV_nolen_const(mysv_val1), |
| 10288 | (IV)REG_NODE_NUM(ret), |
| 10289 | SvPV_nolen_const(mysv_val2), |
| 10290 | (IV)REG_NODE_NUM(ender), |
| 10291 | (IV)(ender - ret) |
| 10292 | ); |
| 10293 | }); |
| 10294 | OP(br)= NOTHING; |
| 10295 | if (OP(ender) == TAIL) { |
| 10296 | NEXT_OFF(br)= 0; |
| 10297 | RExC_emit= br + 1; |
| 10298 | } else { |
| 10299 | regnode *opt; |
| 10300 | for ( opt= br + 1; opt < ender ; opt++ ) |
| 10301 | OP(opt)= OPTIMIZED; |
| 10302 | NEXT_OFF(br)= ender - br; |
| 10303 | } |
| 10304 | } |
| 10305 | } |
| 10306 | } |
| 10307 | |
| 10308 | { |
| 10309 | const char *p; |
| 10310 | static const char parens[] = "=!<,>"; |
| 10311 | |
| 10312 | if (paren && (p = strchr(parens, paren))) { |
| 10313 | U8 node = ((p - parens) % 2) ? UNLESSM : IFMATCH; |
| 10314 | int flag = (p - parens) > 1; |
| 10315 | |
| 10316 | if (paren == '>') |
| 10317 | node = SUSPEND, flag = 0; |
| 10318 | reginsert(pRExC_state, node,ret, depth+1); |
| 10319 | Set_Node_Cur_Length(ret, parse_start); |
| 10320 | Set_Node_Offset(ret, parse_start + 1); |
| 10321 | ret->flags = flag; |
| 10322 | REGTAIL_STUDY(pRExC_state, ret, reg_node(pRExC_state, TAIL)); |
| 10323 | } |
| 10324 | } |
| 10325 | |
| 10326 | /* Check for proper termination. */ |
| 10327 | if (paren) { |
| 10328 | /* restore original flags, but keep (?p) */ |
| 10329 | RExC_flags = oregflags | (RExC_flags & RXf_PMf_KEEPCOPY); |
| 10330 | if (RExC_parse >= RExC_end || *nextchar(pRExC_state) != ')') { |
| 10331 | RExC_parse = oregcomp_parse; |
| 10332 | vFAIL("Unmatched ("); |
| 10333 | } |
| 10334 | } |
| 10335 | else if (!paren && RExC_parse < RExC_end) { |
| 10336 | if (*RExC_parse == ')') { |
| 10337 | RExC_parse++; |
| 10338 | vFAIL("Unmatched )"); |
| 10339 | } |
| 10340 | else |
| 10341 | FAIL("Junk on end of regexp"); /* "Can't happen". */ |
| 10342 | assert(0); /* NOTREACHED */ |
| 10343 | } |
| 10344 | |
| 10345 | if (RExC_in_lookbehind) { |
| 10346 | RExC_in_lookbehind--; |
| 10347 | } |
| 10348 | if (after_freeze > RExC_npar) |
| 10349 | RExC_npar = after_freeze; |
| 10350 | return(ret); |
| 10351 | } |
| 10352 | |
| 10353 | /* |
| 10354 | - regbranch - one alternative of an | operator |
| 10355 | * |
| 10356 | * Implements the concatenation operator. |
| 10357 | * |
| 10358 | * Returns NULL, setting *flagp to RESTART_UTF8 if the sizing scan needs to be |
| 10359 | * restarted. |
| 10360 | */ |
| 10361 | STATIC regnode * |
| 10362 | S_regbranch(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, I32 first, U32 depth) |
| 10363 | { |
| 10364 | regnode *ret; |
| 10365 | regnode *chain = NULL; |
| 10366 | regnode *latest; |
| 10367 | I32 flags = 0, c = 0; |
| 10368 | GET_RE_DEBUG_FLAGS_DECL; |
| 10369 | |
| 10370 | PERL_ARGS_ASSERT_REGBRANCH; |
| 10371 | |
| 10372 | DEBUG_PARSE("brnc"); |
| 10373 | |
| 10374 | if (first) |
| 10375 | ret = NULL; |
| 10376 | else { |
| 10377 | if (!SIZE_ONLY && RExC_extralen) |
| 10378 | ret = reganode(pRExC_state, BRANCHJ,0); |
| 10379 | else { |
| 10380 | ret = reg_node(pRExC_state, BRANCH); |
| 10381 | Set_Node_Length(ret, 1); |
| 10382 | } |
| 10383 | } |
| 10384 | |
| 10385 | if (!first && SIZE_ONLY) |
| 10386 | RExC_extralen += 1; /* BRANCHJ */ |
| 10387 | |
| 10388 | *flagp = WORST; /* Tentatively. */ |
| 10389 | |
| 10390 | RExC_parse--; |
| 10391 | nextchar(pRExC_state); |
| 10392 | while (RExC_parse < RExC_end && *RExC_parse != '|' && *RExC_parse != ')') { |
| 10393 | flags &= ~TRYAGAIN; |
| 10394 | latest = regpiece(pRExC_state, &flags,depth+1); |
| 10395 | if (latest == NULL) { |
| 10396 | if (flags & TRYAGAIN) |
| 10397 | continue; |
| 10398 | if (flags & RESTART_UTF8) { |
| 10399 | *flagp = RESTART_UTF8; |
| 10400 | return NULL; |
| 10401 | } |
| 10402 | FAIL2("panic: regpiece returned NULL, flags=%#"UVxf"", (UV) flags); |
| 10403 | } |
| 10404 | else if (ret == NULL) |
| 10405 | ret = latest; |
| 10406 | *flagp |= flags&(HASWIDTH|POSTPONED); |
| 10407 | if (chain == NULL) /* First piece. */ |
| 10408 | *flagp |= flags&SPSTART; |
| 10409 | else { |
| 10410 | RExC_naughty++; |
| 10411 | REGTAIL(pRExC_state, chain, latest); |
| 10412 | } |
| 10413 | chain = latest; |
| 10414 | c++; |
| 10415 | } |
| 10416 | if (chain == NULL) { /* Loop ran zero times. */ |
| 10417 | chain = reg_node(pRExC_state, NOTHING); |
| 10418 | if (ret == NULL) |
| 10419 | ret = chain; |
| 10420 | } |
| 10421 | if (c == 1) { |
| 10422 | *flagp |= flags&SIMPLE; |
| 10423 | } |
| 10424 | |
| 10425 | return ret; |
| 10426 | } |
| 10427 | |
| 10428 | /* |
| 10429 | - regpiece - something followed by possible [*+?] |
| 10430 | * |
| 10431 | * Note that the branching code sequences used for ? and the general cases |
| 10432 | * of * and + are somewhat optimized: they use the same NOTHING node as |
| 10433 | * both the endmarker for their branch list and the body of the last branch. |
| 10434 | * It might seem that this node could be dispensed with entirely, but the |
| 10435 | * endmarker role is not redundant. |
| 10436 | * |
| 10437 | * Returns NULL, setting *flagp to TRYAGAIN if regatom() returns NULL with |
| 10438 | * TRYAGAIN. |
| 10439 | * Returns NULL, setting *flagp to RESTART_UTF8 if the sizing scan needs to be |
| 10440 | * restarted. |
| 10441 | */ |
| 10442 | STATIC regnode * |
| 10443 | S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth) |
| 10444 | { |
| 10445 | regnode *ret; |
| 10446 | char op; |
| 10447 | char *next; |
| 10448 | I32 flags; |
| 10449 | const char * const origparse = RExC_parse; |
| 10450 | I32 min; |
| 10451 | I32 max = REG_INFTY; |
| 10452 | #ifdef RE_TRACK_PATTERN_OFFSETS |
| 10453 | char *parse_start; |
| 10454 | #endif |
| 10455 | const char *maxpos = NULL; |
| 10456 | |
| 10457 | /* Save the original in case we change the emitted regop to a FAIL. */ |
| 10458 | regnode * const orig_emit = RExC_emit; |
| 10459 | |
| 10460 | GET_RE_DEBUG_FLAGS_DECL; |
| 10461 | |
| 10462 | PERL_ARGS_ASSERT_REGPIECE; |
| 10463 | |
| 10464 | DEBUG_PARSE("piec"); |
| 10465 | |
| 10466 | ret = regatom(pRExC_state, &flags,depth+1); |
| 10467 | if (ret == NULL) { |
| 10468 | if (flags & (TRYAGAIN|RESTART_UTF8)) |
| 10469 | *flagp |= flags & (TRYAGAIN|RESTART_UTF8); |
| 10470 | else |
| 10471 | FAIL2("panic: regatom returned NULL, flags=%#"UVxf"", (UV) flags); |
| 10472 | return(NULL); |
| 10473 | } |
| 10474 | |
| 10475 | op = *RExC_parse; |
| 10476 | |
| 10477 | if (op == '{' && regcurly(RExC_parse)) { |
| 10478 | maxpos = NULL; |
| 10479 | #ifdef RE_TRACK_PATTERN_OFFSETS |
| 10480 | parse_start = RExC_parse; /* MJD */ |
| 10481 | #endif |
| 10482 | next = RExC_parse + 1; |
| 10483 | while (isDIGIT(*next) || *next == ',') { |
| 10484 | if (*next == ',') { |
| 10485 | if (maxpos) |
| 10486 | break; |
| 10487 | else |
| 10488 | maxpos = next; |
| 10489 | } |
| 10490 | next++; |
| 10491 | } |
| 10492 | if (*next == '}') { /* got one */ |
| 10493 | const char* endptr; |
| 10494 | if (!maxpos) |
| 10495 | maxpos = next; |
| 10496 | RExC_parse++; |
| 10497 | min = grok_atou(RExC_parse, &endptr); |
| 10498 | if (*maxpos == ',') |
| 10499 | maxpos++; |
| 10500 | else |
| 10501 | maxpos = RExC_parse; |
| 10502 | max = grok_atou(maxpos, &endptr); |
| 10503 | if (!max && *maxpos != '0') |
| 10504 | max = REG_INFTY; /* meaning "infinity" */ |
| 10505 | else if (max >= REG_INFTY) |
| 10506 | vFAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1); |
| 10507 | RExC_parse = next; |
| 10508 | nextchar(pRExC_state); |
| 10509 | if (max < min) { /* If can't match, warn and optimize to fail |
| 10510 | unconditionally */ |
| 10511 | if (SIZE_ONLY) { |
| 10512 | ckWARNreg(RExC_parse, "Quantifier {n,m} with n > m can't match"); |
| 10513 | |
| 10514 | /* We can't back off the size because we have to reserve |
| 10515 | * enough space for all the things we are about to throw |
| 10516 | * away, but we can shrink it by the ammount we are about |
| 10517 | * to re-use here */ |
| 10518 | RExC_size = PREVOPER(RExC_size) - regarglen[(U8)OPFAIL]; |
| 10519 | } |
| 10520 | else { |
| 10521 | RExC_emit = orig_emit; |
| 10522 | } |
| 10523 | ret = reg_node(pRExC_state, OPFAIL); |
| 10524 | return ret; |
| 10525 | } |
| 10526 | else if (min == max |
| 10527 | && RExC_parse < RExC_end |
| 10528 | && (*RExC_parse == '?' || *RExC_parse == '+')) |
| 10529 | { |
| 10530 | if (SIZE_ONLY) { |
| 10531 | ckWARN2reg(RExC_parse + 1, |
| 10532 | "Useless use of greediness modifier '%c'", |
| 10533 | *RExC_parse); |
| 10534 | } |
| 10535 | /* Absorb the modifier, so later code doesn't see nor use |
| 10536 | * it */ |
| 10537 | nextchar(pRExC_state); |
| 10538 | } |
| 10539 | |
| 10540 | do_curly: |
| 10541 | if ((flags&SIMPLE)) { |
| 10542 | RExC_naughty += 2 + RExC_naughty / 2; |
| 10543 | reginsert(pRExC_state, CURLY, ret, depth+1); |
| 10544 | Set_Node_Offset(ret, parse_start+1); /* MJD */ |
| 10545 | Set_Node_Cur_Length(ret, parse_start); |
| 10546 | } |
| 10547 | else { |
| 10548 | regnode * const w = reg_node(pRExC_state, WHILEM); |
| 10549 | |
| 10550 | w->flags = 0; |
| 10551 | REGTAIL(pRExC_state, ret, w); |
| 10552 | if (!SIZE_ONLY && RExC_extralen) { |
| 10553 | reginsert(pRExC_state, LONGJMP,ret, depth+1); |
| 10554 | reginsert(pRExC_state, NOTHING,ret, depth+1); |
| 10555 | NEXT_OFF(ret) = 3; /* Go over LONGJMP. */ |
| 10556 | } |
| 10557 | reginsert(pRExC_state, CURLYX,ret, depth+1); |
| 10558 | /* MJD hk */ |
| 10559 | Set_Node_Offset(ret, parse_start+1); |
| 10560 | Set_Node_Length(ret, |
| 10561 | op == '{' ? (RExC_parse - parse_start) : 1); |
| 10562 | |
| 10563 | if (!SIZE_ONLY && RExC_extralen) |
| 10564 | NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */ |
| 10565 | REGTAIL(pRExC_state, ret, reg_node(pRExC_state, NOTHING)); |
| 10566 | if (SIZE_ONLY) |
| 10567 | RExC_whilem_seen++, RExC_extralen += 3; |
| 10568 | RExC_naughty += 4 + RExC_naughty; /* compound interest */ |
| 10569 | } |
| 10570 | ret->flags = 0; |
| 10571 | |
| 10572 | if (min > 0) |
| 10573 | *flagp = WORST; |
| 10574 | if (max > 0) |
| 10575 | *flagp |= HASWIDTH; |
| 10576 | if (!SIZE_ONLY) { |
| 10577 | ARG1_SET(ret, (U16)min); |
| 10578 | ARG2_SET(ret, (U16)max); |
| 10579 | } |
| 10580 | if (max == REG_INFTY) |
| 10581 | RExC_seen |= REG_UNBOUNDED_QUANTIFIER_SEEN; |
| 10582 | |
| 10583 | goto nest_check; |
| 10584 | } |
| 10585 | } |
| 10586 | |
| 10587 | if (!ISMULT1(op)) { |
| 10588 | *flagp = flags; |
| 10589 | return(ret); |
| 10590 | } |
| 10591 | |
| 10592 | #if 0 /* Now runtime fix should be reliable. */ |
| 10593 | |
| 10594 | /* if this is reinstated, don't forget to put this back into perldiag: |
| 10595 | |
| 10596 | =item Regexp *+ operand could be empty at {#} in regex m/%s/ |
| 10597 | |
| 10598 | (F) The part of the regexp subject to either the * or + quantifier |
| 10599 | could match an empty string. The {#} shows in the regular |
| 10600 | expression about where the problem was discovered. |
| 10601 | |
| 10602 | */ |
| 10603 | |
| 10604 | if (!(flags&HASWIDTH) && op != '?') |
| 10605 | vFAIL("Regexp *+ operand could be empty"); |
| 10606 | #endif |
| 10607 | |
| 10608 | #ifdef RE_TRACK_PATTERN_OFFSETS |
| 10609 | parse_start = RExC_parse; |
| 10610 | #endif |
| 10611 | nextchar(pRExC_state); |
| 10612 | |
| 10613 | *flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH); |
| 10614 | |
| 10615 | if (op == '*' && (flags&SIMPLE)) { |
| 10616 | reginsert(pRExC_state, STAR, ret, depth+1); |
| 10617 | ret->flags = 0; |
| 10618 | RExC_naughty += 4; |
| 10619 | RExC_seen |= REG_UNBOUNDED_QUANTIFIER_SEEN; |
| 10620 | } |
| 10621 | else if (op == '*') { |
| 10622 | min = 0; |
| 10623 | goto do_curly; |
| 10624 | } |
| 10625 | else if (op == '+' && (flags&SIMPLE)) { |
| 10626 | reginsert(pRExC_state, PLUS, ret, depth+1); |
| 10627 | ret->flags = 0; |
| 10628 | RExC_naughty += 3; |
| 10629 | RExC_seen |= REG_UNBOUNDED_QUANTIFIER_SEEN; |
| 10630 | } |
| 10631 | else if (op == '+') { |
| 10632 | min = 1; |
| 10633 | goto do_curly; |
| 10634 | } |
| 10635 | else if (op == '?') { |
| 10636 | min = 0; max = 1; |
| 10637 | goto do_curly; |
| 10638 | } |
| 10639 | nest_check: |
| 10640 | if (!SIZE_ONLY && !(flags&(HASWIDTH|POSTPONED)) && max > REG_INFTY/3) { |
| 10641 | SAVEFREESV(RExC_rx_sv); /* in case of fatal warnings */ |
| 10642 | ckWARN2reg(RExC_parse, |
| 10643 | "%"UTF8f" matches null string many times", |
| 10644 | UTF8fARG(UTF, (RExC_parse >= origparse |
| 10645 | ? RExC_parse - origparse |
| 10646 | : 0), |
| 10647 | origparse)); |
| 10648 | (void)ReREFCNT_inc(RExC_rx_sv); |
| 10649 | } |
| 10650 | |
| 10651 | if (RExC_parse < RExC_end && *RExC_parse == '?') { |
| 10652 | nextchar(pRExC_state); |
| 10653 | reginsert(pRExC_state, MINMOD, ret, depth+1); |
| 10654 | REGTAIL(pRExC_state, ret, ret + NODE_STEP_REGNODE); |
| 10655 | } |
| 10656 | else |
| 10657 | if (RExC_parse < RExC_end && *RExC_parse == '+') { |
| 10658 | regnode *ender; |
| 10659 | nextchar(pRExC_state); |
| 10660 | ender = reg_node(pRExC_state, SUCCEED); |
| 10661 | REGTAIL(pRExC_state, ret, ender); |
| 10662 | reginsert(pRExC_state, SUSPEND, ret, depth+1); |
| 10663 | ret->flags = 0; |
| 10664 | ender = reg_node(pRExC_state, TAIL); |
| 10665 | REGTAIL(pRExC_state, ret, ender); |
| 10666 | } |
| 10667 | |
| 10668 | if (RExC_parse < RExC_end && ISMULT2(RExC_parse)) { |
| 10669 | RExC_parse++; |
| 10670 | vFAIL("Nested quantifiers"); |
| 10671 | } |
| 10672 | |
| 10673 | return(ret); |
| 10674 | } |
| 10675 | |
| 10676 | STATIC bool |
| 10677 | S_grok_bslash_N(pTHX_ RExC_state_t *pRExC_state, regnode** node_p, |
| 10678 | UV *valuep, I32 *flagp, U32 depth, bool in_char_class, |
| 10679 | const bool strict /* Apply stricter parsing rules? */ |
| 10680 | ) |
| 10681 | { |
| 10682 | |
| 10683 | /* This is expected to be called by a parser routine that has recognized '\N' |
| 10684 | and needs to handle the rest. RExC_parse is expected to point at the first |
| 10685 | char following the N at the time of the call. On successful return, |
| 10686 | RExC_parse has been updated to point to just after the sequence identified |
| 10687 | by this routine, and <*flagp> has been updated. |
| 10688 | |
| 10689 | The \N may be inside (indicated by the boolean <in_char_class>) or outside a |
| 10690 | character class. |
| 10691 | |
| 10692 | \N may begin either a named sequence, or if outside a character class, mean |
| 10693 | to match a non-newline. For non single-quoted regexes, the tokenizer has |
| 10694 | attempted to decide which, and in the case of a named sequence, converted it |
| 10695 | into one of the forms: \N{} (if the sequence is null), or \N{U+c1.c2...}, |
| 10696 | where c1... are the characters in the sequence. For single-quoted regexes, |
| 10697 | the tokenizer passes the \N sequence through unchanged; this code will not |
| 10698 | attempt to determine this nor expand those, instead raising a syntax error. |
| 10699 | The net effect is that if the beginning of the passed-in pattern isn't '{U+' |
| 10700 | or there is no '}', it signals that this \N occurrence means to match a |
| 10701 | non-newline. |
| 10702 | |
| 10703 | Only the \N{U+...} form should occur in a character class, for the same |
| 10704 | reason that '.' inside a character class means to just match a period: it |
| 10705 | just doesn't make sense. |
| 10706 | |
| 10707 | The function raises an error (via vFAIL), and doesn't return for various |
| 10708 | syntax errors. Otherwise it returns TRUE and sets <node_p> or <valuep> on |
| 10709 | success; it returns FALSE otherwise. Returns FALSE, setting *flagp to |
| 10710 | RESTART_UTF8 if the sizing scan needs to be restarted. Such a restart is |
| 10711 | only possible if node_p is non-NULL. |
| 10712 | |
| 10713 | |
| 10714 | If <valuep> is non-null, it means the caller can accept an input sequence |
| 10715 | consisting of a just a single code point; <*valuep> is set to that value |
| 10716 | if the input is such. |
| 10717 | |
| 10718 | If <node_p> is non-null it signifies that the caller can accept any other |
| 10719 | legal sequence (i.e., one that isn't just a single code point). <*node_p> |
| 10720 | is set as follows: |
| 10721 | 1) \N means not-a-NL: points to a newly created REG_ANY node; |
| 10722 | 2) \N{}: points to a new NOTHING node; |
| 10723 | 3) otherwise: points to a new EXACT node containing the resolved |
| 10724 | string. |
| 10725 | Note that FALSE is returned for single code point sequences if <valuep> is |
| 10726 | null. |
| 10727 | */ |
| 10728 | |
| 10729 | char * endbrace; /* '}' following the name */ |
| 10730 | char* p; |
| 10731 | char *endchar; /* Points to '.' or '}' ending cur char in the input |
| 10732 | stream */ |
| 10733 | bool has_multiple_chars; /* true if the input stream contains a sequence of |
| 10734 | more than one character */ |
| 10735 | |
| 10736 | GET_RE_DEBUG_FLAGS_DECL; |
| 10737 | |
| 10738 | PERL_ARGS_ASSERT_GROK_BSLASH_N; |
| 10739 | |
| 10740 | GET_RE_DEBUG_FLAGS; |
| 10741 | |
| 10742 | assert(cBOOL(node_p) ^ cBOOL(valuep)); /* Exactly one should be set */ |
| 10743 | |
| 10744 | /* The [^\n] meaning of \N ignores spaces and comments under the /x |
| 10745 | * modifier. The other meaning does not, so use a temporary until we find |
| 10746 | * out which we are being called with */ |
| 10747 | p = (RExC_flags & RXf_PMf_EXTENDED) |
| 10748 | ? regpatws(pRExC_state, RExC_parse, |
| 10749 | TRUE) /* means recognize comments */ |
| 10750 | : RExC_parse; |
| 10751 | |
| 10752 | /* Disambiguate between \N meaning a named character versus \N meaning |
| 10753 | * [^\n]. The former is assumed when it can't be the latter. */ |
| 10754 | if (*p != '{' || regcurly(p)) { |
| 10755 | RExC_parse = p; |
| 10756 | if (! node_p) { |
| 10757 | /* no bare \N allowed in a charclass */ |
| 10758 | if (in_char_class) { |
| 10759 | vFAIL("\\N in a character class must be a named character: \\N{...}"); |
| 10760 | } |
| 10761 | return FALSE; |
| 10762 | } |
| 10763 | RExC_parse--; /* Need to back off so nextchar() doesn't skip the |
| 10764 | current char */ |
| 10765 | nextchar(pRExC_state); |
| 10766 | *node_p = reg_node(pRExC_state, REG_ANY); |
| 10767 | *flagp |= HASWIDTH|SIMPLE; |
| 10768 | RExC_naughty++; |
| 10769 | Set_Node_Length(*node_p, 1); /* MJD */ |
| 10770 | return TRUE; |
| 10771 | } |
| 10772 | |
| 10773 | /* Here, we have decided it should be a named character or sequence */ |
| 10774 | |
| 10775 | /* The test above made sure that the next real character is a '{', but |
| 10776 | * under the /x modifier, it could be separated by space (or a comment and |
| 10777 | * \n) and this is not allowed (for consistency with \x{...} and the |
| 10778 | * tokenizer handling of \N{NAME}). */ |
| 10779 | if (*RExC_parse != '{') { |
| 10780 | vFAIL("Missing braces on \\N{}"); |
| 10781 | } |
| 10782 | |
| 10783 | RExC_parse++; /* Skip past the '{' */ |
| 10784 | |
| 10785 | if (! (endbrace = strchr(RExC_parse, '}')) /* no trailing brace */ |
| 10786 | || ! (endbrace == RExC_parse /* nothing between the {} */ |
| 10787 | || (endbrace - RExC_parse >= 2 /* U+ (bad hex is checked below |
| 10788 | */ |
| 10789 | && strnEQ(RExC_parse, "U+", 2)))) /* for a better error msg) |
| 10790 | */ |
| 10791 | { |
| 10792 | if (endbrace) RExC_parse = endbrace; /* position msg's '<--HERE' */ |
| 10793 | vFAIL("\\N{NAME} must be resolved by the lexer"); |
| 10794 | } |
| 10795 | |
| 10796 | if (endbrace == RExC_parse) { /* empty: \N{} */ |
| 10797 | bool ret = TRUE; |
| 10798 | if (node_p) { |
| 10799 | *node_p = reg_node(pRExC_state,NOTHING); |
| 10800 | } |
| 10801 | else if (in_char_class) { |
| 10802 | if (SIZE_ONLY && in_char_class) { |
| 10803 | if (strict) { |
| 10804 | RExC_parse++; /* Position after the "}" */ |
| 10805 | vFAIL("Zero length \\N{}"); |
| 10806 | } |
| 10807 | else { |
| 10808 | ckWARNreg(RExC_parse, |
| 10809 | "Ignoring zero length \\N{} in character class"); |
| 10810 | } |
| 10811 | } |
| 10812 | ret = FALSE; |
| 10813 | } |
| 10814 | else { |
| 10815 | return FALSE; |
| 10816 | } |
| 10817 | nextchar(pRExC_state); |
| 10818 | return ret; |
| 10819 | } |
| 10820 | |
| 10821 | RExC_uni_semantics = 1; /* Unicode named chars imply Unicode semantics */ |
| 10822 | RExC_parse += 2; /* Skip past the 'U+' */ |
| 10823 | |
| 10824 | endchar = RExC_parse + strcspn(RExC_parse, ".}"); |
| 10825 | |
| 10826 | /* Code points are separated by dots. If none, there is only one code |
| 10827 | * point, and is terminated by the brace */ |
| 10828 | has_multiple_chars = (endchar < endbrace); |
| 10829 | |
| 10830 | if (valuep && (! has_multiple_chars || in_char_class)) { |
| 10831 | /* We only pay attention to the first char of |
| 10832 | multichar strings being returned in char classes. I kinda wonder |
| 10833 | if this makes sense as it does change the behaviour |
| 10834 | from earlier versions, OTOH that behaviour was broken |
| 10835 | as well. XXX Solution is to recharacterize as |
| 10836 | [rest-of-class]|multi1|multi2... */ |
| 10837 | |
| 10838 | STRLEN length_of_hex = (STRLEN)(endchar - RExC_parse); |
| 10839 | I32 grok_hex_flags = PERL_SCAN_ALLOW_UNDERSCORES |
| 10840 | | PERL_SCAN_DISALLOW_PREFIX |
| 10841 | | (SIZE_ONLY ? PERL_SCAN_SILENT_ILLDIGIT : 0); |
| 10842 | |
| 10843 | *valuep = grok_hex(RExC_parse, &length_of_hex, &grok_hex_flags, NULL); |
| 10844 | |
| 10845 | /* The tokenizer should have guaranteed validity, but it's possible to |
| 10846 | * bypass it by using single quoting, so check */ |
| 10847 | if (length_of_hex == 0 |
| 10848 | || length_of_hex != (STRLEN)(endchar - RExC_parse) ) |
| 10849 | { |
| 10850 | RExC_parse += length_of_hex; /* Includes all the valid */ |
| 10851 | RExC_parse += (RExC_orig_utf8) /* point to after 1st invalid */ |
| 10852 | ? UTF8SKIP(RExC_parse) |
| 10853 | : 1; |
| 10854 | /* Guard against malformed utf8 */ |
| 10855 | if (RExC_parse >= endchar) { |
| 10856 | RExC_parse = endchar; |
| 10857 | } |
| 10858 | vFAIL("Invalid hexadecimal number in \\N{U+...}"); |
| 10859 | } |
| 10860 | |
| 10861 | if (in_char_class && has_multiple_chars) { |
| 10862 | if (strict) { |
| 10863 | RExC_parse = endbrace; |
| 10864 | vFAIL("\\N{} in character class restricted to one character"); |
| 10865 | } |
| 10866 | else { |
| 10867 | ckWARNreg(endchar, "Using just the first character returned by \\N{} in character class"); |
| 10868 | } |
| 10869 | } |
| 10870 | |
| 10871 | RExC_parse = endbrace + 1; |
| 10872 | } |
| 10873 | else if (! node_p || ! has_multiple_chars) { |
| 10874 | |
| 10875 | /* Here, the input is legal, but not according to the caller's |
| 10876 | * options. We fail without advancing the parse, so that the |
| 10877 | * caller can try again */ |
| 10878 | RExC_parse = p; |
| 10879 | return FALSE; |
| 10880 | } |
| 10881 | else { |
| 10882 | |
| 10883 | /* What is done here is to convert this to a sub-pattern of the form |
| 10884 | * (?:\x{char1}\x{char2}...) |
| 10885 | * and then call reg recursively. That way, it retains its atomicness, |
| 10886 | * while not having to worry about special handling that some code |
| 10887 | * points may have. toke.c has converted the original Unicode values |
| 10888 | * to native, so that we can just pass on the hex values unchanged. We |
| 10889 | * do have to set a flag to keep recoding from happening in the |
| 10890 | * recursion */ |
| 10891 | |
| 10892 | SV * substitute_parse = newSVpvn_flags("?:", 2, SVf_UTF8|SVs_TEMP); |
| 10893 | STRLEN len; |
| 10894 | char *orig_end = RExC_end; |
| 10895 | I32 flags; |
| 10896 | |
| 10897 | while (RExC_parse < endbrace) { |
| 10898 | |
| 10899 | /* Convert to notation the rest of the code understands */ |
| 10900 | sv_catpv(substitute_parse, "\\x{"); |
| 10901 | sv_catpvn(substitute_parse, RExC_parse, endchar - RExC_parse); |
| 10902 | sv_catpv(substitute_parse, "}"); |
| 10903 | |
| 10904 | /* Point to the beginning of the next character in the sequence. */ |
| 10905 | RExC_parse = endchar + 1; |
| 10906 | endchar = RExC_parse + strcspn(RExC_parse, ".}"); |
| 10907 | } |
| 10908 | sv_catpv(substitute_parse, ")"); |
| 10909 | |
| 10910 | RExC_parse = SvPV(substitute_parse, len); |
| 10911 | |
| 10912 | /* Don't allow empty number */ |
| 10913 | if (len < 8) { |
| 10914 | vFAIL("Invalid hexadecimal number in \\N{U+...}"); |
| 10915 | } |
| 10916 | RExC_end = RExC_parse + len; |
| 10917 | |
| 10918 | /* The values are Unicode, and therefore not subject to recoding */ |
| 10919 | RExC_override_recoding = 1; |
| 10920 | |
| 10921 | if (!(*node_p = reg(pRExC_state, 1, &flags, depth+1))) { |
| 10922 | if (flags & RESTART_UTF8) { |
| 10923 | *flagp = RESTART_UTF8; |
| 10924 | return FALSE; |
| 10925 | } |
| 10926 | FAIL2("panic: reg returned NULL to grok_bslash_N, flags=%#"UVxf"", |
| 10927 | (UV) flags); |
| 10928 | } |
| 10929 | *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE|POSTPONED); |
| 10930 | |
| 10931 | RExC_parse = endbrace; |
| 10932 | RExC_end = orig_end; |
| 10933 | RExC_override_recoding = 0; |
| 10934 | |
| 10935 | nextchar(pRExC_state); |
| 10936 | } |
| 10937 | |
| 10938 | return TRUE; |
| 10939 | } |
| 10940 | |
| 10941 | |
| 10942 | /* |
| 10943 | * reg_recode |
| 10944 | * |
| 10945 | * It returns the code point in utf8 for the value in *encp. |
| 10946 | * value: a code value in the source encoding |
| 10947 | * encp: a pointer to an Encode object |
| 10948 | * |
| 10949 | * If the result from Encode is not a single character, |
| 10950 | * it returns U+FFFD (Replacement character) and sets *encp to NULL. |
| 10951 | */ |
| 10952 | STATIC UV |
| 10953 | S_reg_recode(pTHX_ const char value, SV **encp) |
| 10954 | { |
| 10955 | STRLEN numlen = 1; |
| 10956 | SV * const sv = newSVpvn_flags(&value, numlen, SVs_TEMP); |
| 10957 | const char * const s = *encp ? sv_recode_to_utf8(sv, *encp) : SvPVX(sv); |
| 10958 | const STRLEN newlen = SvCUR(sv); |
| 10959 | UV uv = UNICODE_REPLACEMENT; |
| 10960 | |
| 10961 | PERL_ARGS_ASSERT_REG_RECODE; |
| 10962 | |
| 10963 | if (newlen) |
| 10964 | uv = SvUTF8(sv) |
| 10965 | ? utf8n_to_uvchr((U8*)s, newlen, &numlen, UTF8_ALLOW_DEFAULT) |
| 10966 | : *(U8*)s; |
| 10967 | |
| 10968 | if (!newlen || numlen != newlen) { |
| 10969 | uv = UNICODE_REPLACEMENT; |
| 10970 | *encp = NULL; |
| 10971 | } |
| 10972 | return uv; |
| 10973 | } |
| 10974 | |
| 10975 | PERL_STATIC_INLINE U8 |
| 10976 | S_compute_EXACTish(RExC_state_t *pRExC_state) |
| 10977 | { |
| 10978 | U8 op; |
| 10979 | |
| 10980 | PERL_ARGS_ASSERT_COMPUTE_EXACTISH; |
| 10981 | |
| 10982 | if (! FOLD) { |
| 10983 | return EXACT; |
| 10984 | } |
| 10985 | |
| 10986 | op = get_regex_charset(RExC_flags); |
| 10987 | if (op >= REGEX_ASCII_RESTRICTED_CHARSET) { |
| 10988 | op--; /* /a is same as /u, and map /aa's offset to what /a's would have |
| 10989 | been, so there is no hole */ |
| 10990 | } |
| 10991 | |
| 10992 | return op + EXACTF; |
| 10993 | } |
| 10994 | |
| 10995 | PERL_STATIC_INLINE void |
| 10996 | S_alloc_maybe_populate_EXACT(pTHX_ RExC_state_t *pRExC_state, |
| 10997 | regnode *node, I32* flagp, STRLEN len, UV code_point, |
| 10998 | bool downgradable) |
| 10999 | { |
| 11000 | /* This knows the details about sizing an EXACTish node, setting flags for |
| 11001 | * it (by setting <*flagp>, and potentially populating it with a single |
| 11002 | * character. |
| 11003 | * |
| 11004 | * If <len> (the length in bytes) is non-zero, this function assumes that |
| 11005 | * the node has already been populated, and just does the sizing. In this |
| 11006 | * case <code_point> should be the final code point that has already been |
| 11007 | * placed into the node. This value will be ignored except that under some |
| 11008 | * circumstances <*flagp> is set based on it. |
| 11009 | * |
| 11010 | * If <len> is zero, the function assumes that the node is to contain only |
| 11011 | * the single character given by <code_point> and calculates what <len> |
| 11012 | * should be. In pass 1, it sizes the node appropriately. In pass 2, it |
| 11013 | * additionally will populate the node's STRING with <code_point> or its |
| 11014 | * fold if folding. |
| 11015 | * |
| 11016 | * In both cases <*flagp> is appropriately set |
| 11017 | * |
| 11018 | * It knows that under FOLD, the Latin Sharp S and UTF characters above |
| 11019 | * 255, must be folded (the former only when the rules indicate it can |
| 11020 | * match 'ss') |
| 11021 | * |
| 11022 | * When it does the populating, it looks at the flag 'downgradable'. If |
| 11023 | * true with a node that folds, it checks if the single code point |
| 11024 | * participates in a fold, and if not downgrades the node to an EXACT. |
| 11025 | * This helps the optimizer */ |
| 11026 | |
| 11027 | bool len_passed_in = cBOOL(len != 0); |
| 11028 | U8 character[UTF8_MAXBYTES_CASE+1]; |
| 11029 | |
| 11030 | PERL_ARGS_ASSERT_ALLOC_MAYBE_POPULATE_EXACT; |
| 11031 | |
| 11032 | /* Don't bother to check for downgrading in PASS1, as it doesn't make any |
| 11033 | * sizing difference, and is extra work that is thrown away */ |
| 11034 | if (downgradable && ! PASS2) { |
| 11035 | downgradable = FALSE; |
| 11036 | } |
| 11037 | |
| 11038 | if (! len_passed_in) { |
| 11039 | if (UTF) { |
| 11040 | if (UNI_IS_INVARIANT(code_point)) { |
| 11041 | if (LOC || ! FOLD) { /* /l defers folding until runtime */ |
| 11042 | *character = (U8) code_point; |
| 11043 | } |
| 11044 | else { /* Here is /i and not /l (toFOLD() is defined on just |
| 11045 | ASCII, which isn't the same thing as INVARIANT on |
| 11046 | EBCDIC, but it works there, as the extra invariants |
| 11047 | fold to themselves) */ |
| 11048 | *character = toFOLD((U8) code_point); |
| 11049 | |
| 11050 | /* We can downgrade to an EXACT node if this character |
| 11051 | * isn't a folding one. Note that this assumes that |
| 11052 | * nothing above Latin1 folds to some other invariant than |
| 11053 | * one of these alphabetics; otherwise we would also have |
| 11054 | * to check: |
| 11055 | * && (! HAS_NONLATIN1_FOLD_CLOSURE(code_point) |
| 11056 | * || ASCII_FOLD_RESTRICTED)) |
| 11057 | */ |
| 11058 | if (downgradable && PL_fold[code_point] == code_point) { |
| 11059 | OP(node) = EXACT; |
| 11060 | } |
| 11061 | } |
| 11062 | len = 1; |
| 11063 | } |
| 11064 | else if (FOLD && (! LOC |
| 11065 | || ! is_PROBLEMATIC_LOCALE_FOLD_cp(code_point))) |
| 11066 | { /* Folding, and ok to do so now */ |
| 11067 | UV folded = _to_uni_fold_flags( |
| 11068 | code_point, |
| 11069 | character, |
| 11070 | &len, |
| 11071 | FOLD_FLAGS_FULL | ((ASCII_FOLD_RESTRICTED) |
| 11072 | ? FOLD_FLAGS_NOMIX_ASCII |
| 11073 | : 0)); |
| 11074 | if (downgradable |
| 11075 | && folded == code_point |
| 11076 | && ! _invlist_contains_cp(PL_utf8_foldable, code_point)) |
| 11077 | { |
| 11078 | OP(node) = EXACT; |
| 11079 | } |
| 11080 | } |
| 11081 | else if (code_point <= MAX_UTF8_TWO_BYTE) { |
| 11082 | |
| 11083 | /* Not folding this cp, and can output it directly */ |
| 11084 | *character = UTF8_TWO_BYTE_HI(code_point); |
| 11085 | *(character + 1) = UTF8_TWO_BYTE_LO(code_point); |
| 11086 | len = 2; |
| 11087 | } |
| 11088 | else { |
| 11089 | uvchr_to_utf8( character, code_point); |
| 11090 | len = UTF8SKIP(character); |
| 11091 | } |
| 11092 | } /* Else pattern isn't UTF8. */ |
| 11093 | else if (! FOLD) { |
| 11094 | *character = (U8) code_point; |
| 11095 | len = 1; |
| 11096 | } /* Else is folded non-UTF8 */ |
| 11097 | else if (LIKELY(code_point != LATIN_SMALL_LETTER_SHARP_S)) { |
| 11098 | |
| 11099 | /* We don't fold any non-UTF8 except possibly the Sharp s (see |
| 11100 | * comments at join_exact()); */ |
| 11101 | *character = (U8) code_point; |
| 11102 | len = 1; |
| 11103 | |
| 11104 | /* Can turn into an EXACT node if we know the fold at compile time, |
| 11105 | * and it folds to itself and doesn't particpate in other folds */ |
| 11106 | if (downgradable |
| 11107 | && ! LOC |
| 11108 | && PL_fold_latin1[code_point] == code_point |
| 11109 | && (! HAS_NONLATIN1_FOLD_CLOSURE(code_point) |
| 11110 | || (isASCII(code_point) && ASCII_FOLD_RESTRICTED))) |
| 11111 | { |
| 11112 | OP(node) = EXACT; |
| 11113 | } |
| 11114 | } /* else is Sharp s. May need to fold it */ |
| 11115 | else if (AT_LEAST_UNI_SEMANTICS && ! ASCII_FOLD_RESTRICTED) { |
| 11116 | *character = 's'; |
| 11117 | *(character + 1) = 's'; |
| 11118 | len = 2; |
| 11119 | } |
| 11120 | else { |
| 11121 | *character = LATIN_SMALL_LETTER_SHARP_S; |
| 11122 | len = 1; |
| 11123 | } |
| 11124 | } |
| 11125 | |
| 11126 | if (SIZE_ONLY) { |
| 11127 | RExC_size += STR_SZ(len); |
| 11128 | } |
| 11129 | else { |
| 11130 | RExC_emit += STR_SZ(len); |
| 11131 | STR_LEN(node) = len; |
| 11132 | if (! len_passed_in) { |
| 11133 | Copy((char *) character, STRING(node), len, char); |
| 11134 | } |
| 11135 | } |
| 11136 | |
| 11137 | *flagp |= HASWIDTH; |
| 11138 | |
| 11139 | /* A single character node is SIMPLE, except for the special-cased SHARP S |
| 11140 | * under /di. */ |
| 11141 | if ((len == 1 || (UTF && len == UNISKIP(code_point))) |
| 11142 | && (code_point != LATIN_SMALL_LETTER_SHARP_S |
| 11143 | || ! FOLD || ! DEPENDS_SEMANTICS)) |
| 11144 | { |
| 11145 | *flagp |= SIMPLE; |
| 11146 | } |
| 11147 | |
| 11148 | /* The OP may not be well defined in PASS1 */ |
| 11149 | if (PASS2 && OP(node) == EXACTFL) { |
| 11150 | RExC_contains_locale = 1; |
| 11151 | } |
| 11152 | } |
| 11153 | |
| 11154 | |
| 11155 | /* Parse backref decimal value, unless it's too big to sensibly be a backref, |
| 11156 | * in which case return I32_MAX (rather than possibly 32-bit wrapping) */ |
| 11157 | |
| 11158 | static I32 |
| 11159 | S_backref_value(char *p) |
| 11160 | { |
| 11161 | const char* endptr; |
| 11162 | UV val = grok_atou(p, &endptr); |
| 11163 | if (endptr == p || endptr == NULL || val > I32_MAX) |
| 11164 | return I32_MAX; |
| 11165 | return (I32)val; |
| 11166 | } |
| 11167 | |
| 11168 | |
| 11169 | /* |
| 11170 | - regatom - the lowest level |
| 11171 | |
| 11172 | Try to identify anything special at the start of the pattern. If there |
| 11173 | is, then handle it as required. This may involve generating a single regop, |
| 11174 | such as for an assertion; or it may involve recursing, such as to |
| 11175 | handle a () structure. |
| 11176 | |
| 11177 | If the string doesn't start with something special then we gobble up |
| 11178 | as much literal text as we can. |
| 11179 | |
| 11180 | Once we have been able to handle whatever type of thing started the |
| 11181 | sequence, we return. |
| 11182 | |
| 11183 | Note: we have to be careful with escapes, as they can be both literal |
| 11184 | and special, and in the case of \10 and friends, context determines which. |
| 11185 | |
| 11186 | A summary of the code structure is: |
| 11187 | |
| 11188 | switch (first_byte) { |
| 11189 | cases for each special: |
| 11190 | handle this special; |
| 11191 | break; |
| 11192 | case '\\': |
| 11193 | switch (2nd byte) { |
| 11194 | cases for each unambiguous special: |
| 11195 | handle this special; |
| 11196 | break; |
| 11197 | cases for each ambigous special/literal: |
| 11198 | disambiguate; |
| 11199 | if (special) handle here |
| 11200 | else goto defchar; |
| 11201 | default: // unambiguously literal: |
| 11202 | goto defchar; |
| 11203 | } |
| 11204 | default: // is a literal char |
| 11205 | // FALL THROUGH |
| 11206 | defchar: |
| 11207 | create EXACTish node for literal; |
| 11208 | while (more input and node isn't full) { |
| 11209 | switch (input_byte) { |
| 11210 | cases for each special; |
| 11211 | make sure parse pointer is set so that the next call to |
| 11212 | regatom will see this special first |
| 11213 | goto loopdone; // EXACTish node terminated by prev. char |
| 11214 | default: |
| 11215 | append char to EXACTISH node; |
| 11216 | } |
| 11217 | get next input byte; |
| 11218 | } |
| 11219 | loopdone: |
| 11220 | } |
| 11221 | return the generated node; |
| 11222 | |
| 11223 | Specifically there are two separate switches for handling |
| 11224 | escape sequences, with the one for handling literal escapes requiring |
| 11225 | a dummy entry for all of the special escapes that are actually handled |
| 11226 | by the other. |
| 11227 | |
| 11228 | Returns NULL, setting *flagp to TRYAGAIN if reg() returns NULL with |
| 11229 | TRYAGAIN. |
| 11230 | Returns NULL, setting *flagp to RESTART_UTF8 if the sizing scan needs to be |
| 11231 | restarted. |
| 11232 | Otherwise does not return NULL. |
| 11233 | */ |
| 11234 | |
| 11235 | STATIC regnode * |
| 11236 | S_regatom(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth) |
| 11237 | { |
| 11238 | regnode *ret = NULL; |
| 11239 | I32 flags = 0; |
| 11240 | char *parse_start = RExC_parse; |
| 11241 | U8 op; |
| 11242 | int invert = 0; |
| 11243 | U8 arg; |
| 11244 | |
| 11245 | GET_RE_DEBUG_FLAGS_DECL; |
| 11246 | |
| 11247 | *flagp = WORST; /* Tentatively. */ |
| 11248 | |
| 11249 | DEBUG_PARSE("atom"); |
| 11250 | |
| 11251 | PERL_ARGS_ASSERT_REGATOM; |
| 11252 | |
| 11253 | tryagain: |
| 11254 | switch ((U8)*RExC_parse) { |
| 11255 | case '^': |
| 11256 | RExC_seen_zerolen++; |
| 11257 | nextchar(pRExC_state); |
| 11258 | if (RExC_flags & RXf_PMf_MULTILINE) |
| 11259 | ret = reg_node(pRExC_state, MBOL); |
| 11260 | else if (RExC_flags & RXf_PMf_SINGLELINE) |
| 11261 | ret = reg_node(pRExC_state, SBOL); |
| 11262 | else |
| 11263 | ret = reg_node(pRExC_state, BOL); |
| 11264 | Set_Node_Length(ret, 1); /* MJD */ |
| 11265 | break; |
| 11266 | case '$': |
| 11267 | nextchar(pRExC_state); |
| 11268 | if (*RExC_parse) |
| 11269 | RExC_seen_zerolen++; |
| 11270 | if (RExC_flags & RXf_PMf_MULTILINE) |
| 11271 | ret = reg_node(pRExC_state, MEOL); |
| 11272 | else if (RExC_flags & RXf_PMf_SINGLELINE) |
| 11273 | ret = reg_node(pRExC_state, SEOL); |
| 11274 | else |
| 11275 | ret = reg_node(pRExC_state, EOL); |
| 11276 | Set_Node_Length(ret, 1); /* MJD */ |
| 11277 | break; |
| 11278 | case '.': |
| 11279 | nextchar(pRExC_state); |
| 11280 | if (RExC_flags & RXf_PMf_SINGLELINE) |
| 11281 | ret = reg_node(pRExC_state, SANY); |
| 11282 | else |
| 11283 | ret = reg_node(pRExC_state, REG_ANY); |
| 11284 | *flagp |= HASWIDTH|SIMPLE; |
| 11285 | RExC_naughty++; |
| 11286 | Set_Node_Length(ret, 1); /* MJD */ |
| 11287 | break; |
| 11288 | case '[': |
| 11289 | { |
| 11290 | char * const oregcomp_parse = ++RExC_parse; |
| 11291 | ret = regclass(pRExC_state, flagp,depth+1, |
| 11292 | FALSE, /* means parse the whole char class */ |
| 11293 | TRUE, /* allow multi-char folds */ |
| 11294 | FALSE, /* don't silence non-portable warnings. */ |
| 11295 | NULL); |
| 11296 | if (*RExC_parse != ']') { |
| 11297 | RExC_parse = oregcomp_parse; |
| 11298 | vFAIL("Unmatched ["); |
| 11299 | } |
| 11300 | if (ret == NULL) { |
| 11301 | if (*flagp & RESTART_UTF8) |
| 11302 | return NULL; |
| 11303 | FAIL2("panic: regclass returned NULL to regatom, flags=%#"UVxf"", |
| 11304 | (UV) *flagp); |
| 11305 | } |
| 11306 | nextchar(pRExC_state); |
| 11307 | Set_Node_Length(ret, RExC_parse - oregcomp_parse + 1); /* MJD */ |
| 11308 | break; |
| 11309 | } |
| 11310 | case '(': |
| 11311 | nextchar(pRExC_state); |
| 11312 | ret = reg(pRExC_state, 2, &flags,depth+1); |
| 11313 | if (ret == NULL) { |
| 11314 | if (flags & TRYAGAIN) { |
| 11315 | if (RExC_parse == RExC_end) { |
| 11316 | /* Make parent create an empty node if needed. */ |
| 11317 | *flagp |= TRYAGAIN; |
| 11318 | return(NULL); |
| 11319 | } |
| 11320 | goto tryagain; |
| 11321 | } |
| 11322 | if (flags & RESTART_UTF8) { |
| 11323 | *flagp = RESTART_UTF8; |
| 11324 | return NULL; |
| 11325 | } |
| 11326 | FAIL2("panic: reg returned NULL to regatom, flags=%#"UVxf"", |
| 11327 | (UV) flags); |
| 11328 | } |
| 11329 | *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE|POSTPONED); |
| 11330 | break; |
| 11331 | case '|': |
| 11332 | case ')': |
| 11333 | if (flags & TRYAGAIN) { |
| 11334 | *flagp |= TRYAGAIN; |
| 11335 | return NULL; |
| 11336 | } |
| 11337 | vFAIL("Internal urp"); |
| 11338 | /* Supposed to be caught earlier. */ |
| 11339 | break; |
| 11340 | case '?': |
| 11341 | case '+': |
| 11342 | case '*': |
| 11343 | RExC_parse++; |
| 11344 | vFAIL("Quantifier follows nothing"); |
| 11345 | break; |
| 11346 | case '\\': |
| 11347 | /* Special Escapes |
| 11348 | |
| 11349 | This switch handles escape sequences that resolve to some kind |
| 11350 | of special regop and not to literal text. Escape sequnces that |
| 11351 | resolve to literal text are handled below in the switch marked |
| 11352 | "Literal Escapes". |
| 11353 | |
| 11354 | Every entry in this switch *must* have a corresponding entry |
| 11355 | in the literal escape switch. However, the opposite is not |
| 11356 | required, as the default for this switch is to jump to the |
| 11357 | literal text handling code. |
| 11358 | */ |
| 11359 | switch ((U8)*++RExC_parse) { |
| 11360 | /* Special Escapes */ |
| 11361 | case 'A': |
| 11362 | RExC_seen_zerolen++; |
| 11363 | ret = reg_node(pRExC_state, SBOL); |
| 11364 | *flagp |= SIMPLE; |
| 11365 | goto finish_meta_pat; |
| 11366 | case 'G': |
| 11367 | ret = reg_node(pRExC_state, GPOS); |
| 11368 | RExC_seen |= REG_GPOS_SEEN; |
| 11369 | *flagp |= SIMPLE; |
| 11370 | goto finish_meta_pat; |
| 11371 | case 'K': |
| 11372 | RExC_seen_zerolen++; |
| 11373 | ret = reg_node(pRExC_state, KEEPS); |
| 11374 | *flagp |= SIMPLE; |
| 11375 | /* XXX:dmq : disabling in-place substitution seems to |
| 11376 | * be necessary here to avoid cases of memory corruption, as |
| 11377 | * with: C<$_="x" x 80; s/x\K/y/> -- rgs |
| 11378 | */ |
| 11379 | RExC_seen |= REG_LOOKBEHIND_SEEN; |
| 11380 | goto finish_meta_pat; |
| 11381 | case 'Z': |
| 11382 | ret = reg_node(pRExC_state, SEOL); |
| 11383 | *flagp |= SIMPLE; |
| 11384 | RExC_seen_zerolen++; /* Do not optimize RE away */ |
| 11385 | goto finish_meta_pat; |
| 11386 | case 'z': |
| 11387 | ret = reg_node(pRExC_state, EOS); |
| 11388 | *flagp |= SIMPLE; |
| 11389 | RExC_seen_zerolen++; /* Do not optimize RE away */ |
| 11390 | goto finish_meta_pat; |
| 11391 | case 'C': |
| 11392 | ret = reg_node(pRExC_state, CANY); |
| 11393 | RExC_seen |= REG_CANY_SEEN; |
| 11394 | *flagp |= HASWIDTH|SIMPLE; |
| 11395 | if (SIZE_ONLY) { |
| 11396 | ckWARNdep(RExC_parse+1, "\\C is deprecated"); |
| 11397 | } |
| 11398 | goto finish_meta_pat; |
| 11399 | case 'X': |
| 11400 | ret = reg_node(pRExC_state, CLUMP); |
| 11401 | *flagp |= HASWIDTH; |
| 11402 | goto finish_meta_pat; |
| 11403 | |
| 11404 | case 'W': |
| 11405 | invert = 1; |
| 11406 | /* FALLTHROUGH */ |
| 11407 | case 'w': |
| 11408 | arg = ANYOF_WORDCHAR; |
| 11409 | goto join_posix; |
| 11410 | |
| 11411 | case 'b': |
| 11412 | RExC_seen_zerolen++; |
| 11413 | RExC_seen |= REG_LOOKBEHIND_SEEN; |
| 11414 | op = BOUND + get_regex_charset(RExC_flags); |
| 11415 | if (op > BOUNDA) { /* /aa is same as /a */ |
| 11416 | op = BOUNDA; |
| 11417 | } |
| 11418 | else if (op == BOUNDL) { |
| 11419 | RExC_contains_locale = 1; |
| 11420 | } |
| 11421 | ret = reg_node(pRExC_state, op); |
| 11422 | FLAGS(ret) = get_regex_charset(RExC_flags); |
| 11423 | *flagp |= SIMPLE; |
| 11424 | if (! SIZE_ONLY && (U8) *(RExC_parse + 1) == '{') { |
| 11425 | /* diag_listed_as: Use "%s" instead of "%s" */ |
| 11426 | vFAIL("Use \"\\b\\{\" instead of \"\\b{\""); |
| 11427 | } |
| 11428 | goto finish_meta_pat; |
| 11429 | case 'B': |
| 11430 | RExC_seen_zerolen++; |
| 11431 | RExC_seen |= REG_LOOKBEHIND_SEEN; |
| 11432 | op = NBOUND + get_regex_charset(RExC_flags); |
| 11433 | if (op > NBOUNDA) { /* /aa is same as /a */ |
| 11434 | op = NBOUNDA; |
| 11435 | } |
| 11436 | else if (op == NBOUNDL) { |
| 11437 | RExC_contains_locale = 1; |
| 11438 | } |
| 11439 | ret = reg_node(pRExC_state, op); |
| 11440 | FLAGS(ret) = get_regex_charset(RExC_flags); |
| 11441 | *flagp |= SIMPLE; |
| 11442 | if (! SIZE_ONLY && (U8) *(RExC_parse + 1) == '{') { |
| 11443 | /* diag_listed_as: Use "%s" instead of "%s" */ |
| 11444 | vFAIL("Use \"\\B\\{\" instead of \"\\B{\""); |
| 11445 | } |
| 11446 | goto finish_meta_pat; |
| 11447 | |
| 11448 | case 'D': |
| 11449 | invert = 1; |
| 11450 | /* FALLTHROUGH */ |
| 11451 | case 'd': |
| 11452 | arg = ANYOF_DIGIT; |
| 11453 | goto join_posix; |
| 11454 | |
| 11455 | case 'R': |
| 11456 | ret = reg_node(pRExC_state, LNBREAK); |
| 11457 | *flagp |= HASWIDTH|SIMPLE; |
| 11458 | goto finish_meta_pat; |
| 11459 | |
| 11460 | case 'H': |
| 11461 | invert = 1; |
| 11462 | /* FALLTHROUGH */ |
| 11463 | case 'h': |
| 11464 | arg = ANYOF_BLANK; |
| 11465 | op = POSIXU; |
| 11466 | goto join_posix_op_known; |
| 11467 | |
| 11468 | case 'V': |
| 11469 | invert = 1; |
| 11470 | /* FALLTHROUGH */ |
| 11471 | case 'v': |
| 11472 | arg = ANYOF_VERTWS; |
| 11473 | op = POSIXU; |
| 11474 | goto join_posix_op_known; |
| 11475 | |
| 11476 | case 'S': |
| 11477 | invert = 1; |
| 11478 | /* FALLTHROUGH */ |
| 11479 | case 's': |
| 11480 | arg = ANYOF_SPACE; |
| 11481 | |
| 11482 | join_posix: |
| 11483 | |
| 11484 | op = POSIXD + get_regex_charset(RExC_flags); |
| 11485 | if (op > POSIXA) { /* /aa is same as /a */ |
| 11486 | op = POSIXA; |
| 11487 | } |
| 11488 | else if (op == POSIXL) { |
| 11489 | RExC_contains_locale = 1; |
| 11490 | } |
| 11491 | |
| 11492 | join_posix_op_known: |
| 11493 | |
| 11494 | if (invert) { |
| 11495 | op += NPOSIXD - POSIXD; |
| 11496 | } |
| 11497 | |
| 11498 | ret = reg_node(pRExC_state, op); |
| 11499 | if (! SIZE_ONLY) { |
| 11500 | FLAGS(ret) = namedclass_to_classnum(arg); |
| 11501 | } |
| 11502 | |
| 11503 | *flagp |= HASWIDTH|SIMPLE; |
| 11504 | /* FALLTHROUGH */ |
| 11505 | |
| 11506 | finish_meta_pat: |
| 11507 | nextchar(pRExC_state); |
| 11508 | Set_Node_Length(ret, 2); /* MJD */ |
| 11509 | break; |
| 11510 | case 'p': |
| 11511 | case 'P': |
| 11512 | { |
| 11513 | #ifdef DEBUGGING |
| 11514 | char* parse_start = RExC_parse - 2; |
| 11515 | #endif |
| 11516 | |
| 11517 | RExC_parse--; |
| 11518 | |
| 11519 | ret = regclass(pRExC_state, flagp,depth+1, |
| 11520 | TRUE, /* means just parse this element */ |
| 11521 | FALSE, /* don't allow multi-char folds */ |
| 11522 | FALSE, /* don't silence non-portable warnings. |
| 11523 | It would be a bug if these returned |
| 11524 | non-portables */ |
| 11525 | NULL); |
| 11526 | /* regclass() can only return RESTART_UTF8 if multi-char folds |
| 11527 | are allowed. */ |
| 11528 | if (!ret) |
| 11529 | FAIL2("panic: regclass returned NULL to regatom, flags=%#"UVxf"", |
| 11530 | (UV) *flagp); |
| 11531 | |
| 11532 | RExC_parse--; |
| 11533 | |
| 11534 | Set_Node_Offset(ret, parse_start + 2); |
| 11535 | Set_Node_Cur_Length(ret, parse_start); |
| 11536 | nextchar(pRExC_state); |
| 11537 | } |
| 11538 | break; |
| 11539 | case 'N': |
| 11540 | /* Handle \N and \N{NAME} with multiple code points here and not |
| 11541 | * below because it can be multicharacter. join_exact() will join |
| 11542 | * them up later on. Also this makes sure that things like |
| 11543 | * /\N{BLAH}+/ and \N{BLAH} being multi char Just Happen. dmq. |
| 11544 | * The options to the grok function call causes it to fail if the |
| 11545 | * sequence is just a single code point. We then go treat it as |
| 11546 | * just another character in the current EXACT node, and hence it |
| 11547 | * gets uniform treatment with all the other characters. The |
| 11548 | * special treatment for quantifiers is not needed for such single |
| 11549 | * character sequences */ |
| 11550 | ++RExC_parse; |
| 11551 | if (! grok_bslash_N(pRExC_state, &ret, NULL, flagp, depth, FALSE, |
| 11552 | FALSE /* not strict */ )) { |
| 11553 | if (*flagp & RESTART_UTF8) |
| 11554 | return NULL; |
| 11555 | RExC_parse--; |
| 11556 | goto defchar; |
| 11557 | } |
| 11558 | break; |
| 11559 | case 'k': /* Handle \k<NAME> and \k'NAME' */ |
| 11560 | parse_named_seq: |
| 11561 | { |
| 11562 | char ch= RExC_parse[1]; |
| 11563 | if (ch != '<' && ch != '\'' && ch != '{') { |
| 11564 | RExC_parse++; |
| 11565 | /* diag_listed_as: Sequence \%s... not terminated in regex; marked by <-- HERE in m/%s/ */ |
| 11566 | vFAIL2("Sequence %.2s... not terminated",parse_start); |
| 11567 | } else { |
| 11568 | /* this pretty much dupes the code for (?P=...) in reg(), if |
| 11569 | you change this make sure you change that */ |
| 11570 | char* name_start = (RExC_parse += 2); |
| 11571 | U32 num = 0; |
| 11572 | SV *sv_dat = reg_scan_name(pRExC_state, |
| 11573 | SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA); |
| 11574 | ch= (ch == '<') ? '>' : (ch == '{') ? '}' : '\''; |
| 11575 | if (RExC_parse == name_start || *RExC_parse != ch) |
| 11576 | /* diag_listed_as: Sequence \%s... not terminated in regex; marked by <-- HERE in m/%s/ */ |
| 11577 | vFAIL2("Sequence %.3s... not terminated",parse_start); |
| 11578 | |
| 11579 | if (!SIZE_ONLY) { |
| 11580 | num = add_data( pRExC_state, STR_WITH_LEN("S")); |
| 11581 | RExC_rxi->data->data[num]=(void*)sv_dat; |
| 11582 | SvREFCNT_inc_simple_void(sv_dat); |
| 11583 | } |
| 11584 | |
| 11585 | RExC_sawback = 1; |
| 11586 | ret = reganode(pRExC_state, |
| 11587 | ((! FOLD) |
| 11588 | ? NREF |
| 11589 | : (ASCII_FOLD_RESTRICTED) |
| 11590 | ? NREFFA |
| 11591 | : (AT_LEAST_UNI_SEMANTICS) |
| 11592 | ? NREFFU |
| 11593 | : (LOC) |
| 11594 | ? NREFFL |
| 11595 | : NREFF), |
| 11596 | num); |
| 11597 | *flagp |= HASWIDTH; |
| 11598 | |
| 11599 | /* override incorrect value set in reganode MJD */ |
| 11600 | Set_Node_Offset(ret, parse_start+1); |
| 11601 | Set_Node_Cur_Length(ret, parse_start); |
| 11602 | nextchar(pRExC_state); |
| 11603 | |
| 11604 | } |
| 11605 | break; |
| 11606 | } |
| 11607 | case 'g': |
| 11608 | case '1': case '2': case '3': case '4': |
| 11609 | case '5': case '6': case '7': case '8': case '9': |
| 11610 | { |
| 11611 | I32 num; |
| 11612 | bool hasbrace = 0; |
| 11613 | |
| 11614 | if (*RExC_parse == 'g') { |
| 11615 | bool isrel = 0; |
| 11616 | |
| 11617 | RExC_parse++; |
| 11618 | if (*RExC_parse == '{') { |
| 11619 | RExC_parse++; |
| 11620 | hasbrace = 1; |
| 11621 | } |
| 11622 | if (*RExC_parse == '-') { |
| 11623 | RExC_parse++; |
| 11624 | isrel = 1; |
| 11625 | } |
| 11626 | if (hasbrace && !isDIGIT(*RExC_parse)) { |
| 11627 | if (isrel) RExC_parse--; |
| 11628 | RExC_parse -= 2; |
| 11629 | goto parse_named_seq; |
| 11630 | } |
| 11631 | |
| 11632 | num = S_backref_value(RExC_parse); |
| 11633 | if (num == 0) |
| 11634 | vFAIL("Reference to invalid group 0"); |
| 11635 | else if (num == I32_MAX) { |
| 11636 | if (isDIGIT(*RExC_parse)) |
| 11637 | vFAIL("Reference to nonexistent group"); |
| 11638 | else |
| 11639 | vFAIL("Unterminated \\g... pattern"); |
| 11640 | } |
| 11641 | |
| 11642 | if (isrel) { |
| 11643 | num = RExC_npar - num; |
| 11644 | if (num < 1) |
| 11645 | vFAIL("Reference to nonexistent or unclosed group"); |
| 11646 | } |
| 11647 | } |
| 11648 | else { |
| 11649 | num = S_backref_value(RExC_parse); |
| 11650 | /* bare \NNN might be backref or octal - if it is larger than or equal |
| 11651 | * RExC_npar then it is assumed to be and octal escape. |
| 11652 | * Note RExC_npar is +1 from the actual number of parens*/ |
| 11653 | if (num == I32_MAX || (num > 9 && num >= RExC_npar |
| 11654 | && *RExC_parse != '8' && *RExC_parse != '9')) |
| 11655 | { |
| 11656 | /* Probably a character specified in octal, e.g. \35 */ |
| 11657 | goto defchar; |
| 11658 | } |
| 11659 | } |
| 11660 | |
| 11661 | /* at this point RExC_parse definitely points to a backref |
| 11662 | * number */ |
| 11663 | { |
| 11664 | #ifdef RE_TRACK_PATTERN_OFFSETS |
| 11665 | char * const parse_start = RExC_parse - 1; /* MJD */ |
| 11666 | #endif |
| 11667 | while (isDIGIT(*RExC_parse)) |
| 11668 | RExC_parse++; |
| 11669 | if (hasbrace) { |
| 11670 | if (*RExC_parse != '}') |
| 11671 | vFAIL("Unterminated \\g{...} pattern"); |
| 11672 | RExC_parse++; |
| 11673 | } |
| 11674 | if (!SIZE_ONLY) { |
| 11675 | if (num > (I32)RExC_rx->nparens) |
| 11676 | vFAIL("Reference to nonexistent group"); |
| 11677 | } |
| 11678 | RExC_sawback = 1; |
| 11679 | ret = reganode(pRExC_state, |
| 11680 | ((! FOLD) |
| 11681 | ? REF |
| 11682 | : (ASCII_FOLD_RESTRICTED) |
| 11683 | ? REFFA |
| 11684 | : (AT_LEAST_UNI_SEMANTICS) |
| 11685 | ? REFFU |
| 11686 | : (LOC) |
| 11687 | ? REFFL |
| 11688 | : REFF), |
| 11689 | num); |
| 11690 | *flagp |= HASWIDTH; |
| 11691 | |
| 11692 | /* override incorrect value set in reganode MJD */ |
| 11693 | Set_Node_Offset(ret, parse_start+1); |
| 11694 | Set_Node_Cur_Length(ret, parse_start); |
| 11695 | RExC_parse--; |
| 11696 | nextchar(pRExC_state); |
| 11697 | } |
| 11698 | } |
| 11699 | break; |
| 11700 | case '\0': |
| 11701 | if (RExC_parse >= RExC_end) |
| 11702 | FAIL("Trailing \\"); |
| 11703 | /* FALLTHROUGH */ |
| 11704 | default: |
| 11705 | /* Do not generate "unrecognized" warnings here, we fall |
| 11706 | back into the quick-grab loop below */ |
| 11707 | parse_start--; |
| 11708 | goto defchar; |
| 11709 | } |
| 11710 | break; |
| 11711 | |
| 11712 | case '#': |
| 11713 | if (RExC_flags & RXf_PMf_EXTENDED) { |
| 11714 | RExC_parse = reg_skipcomment( pRExC_state, RExC_parse ); |
| 11715 | if (RExC_parse < RExC_end) |
| 11716 | goto tryagain; |
| 11717 | } |
| 11718 | /* FALLTHROUGH */ |
| 11719 | |
| 11720 | default: |
| 11721 | |
| 11722 | parse_start = RExC_parse - 1; |
| 11723 | |
| 11724 | RExC_parse++; |
| 11725 | |
| 11726 | defchar: { |
| 11727 | STRLEN len = 0; |
| 11728 | UV ender = 0; |
| 11729 | char *p; |
| 11730 | char *s; |
| 11731 | #define MAX_NODE_STRING_SIZE 127 |
| 11732 | char foldbuf[MAX_NODE_STRING_SIZE+UTF8_MAXBYTES_CASE]; |
| 11733 | char *s0; |
| 11734 | U8 upper_parse = MAX_NODE_STRING_SIZE; |
| 11735 | U8 node_type = compute_EXACTish(pRExC_state); |
| 11736 | bool next_is_quantifier; |
| 11737 | char * oldp = NULL; |
| 11738 | |
| 11739 | /* We can convert EXACTF nodes to EXACTFU if they contain only |
| 11740 | * characters that match identically regardless of the target |
| 11741 | * string's UTF8ness. The reason to do this is that EXACTF is not |
| 11742 | * trie-able, EXACTFU is. |
| 11743 | * |
| 11744 | * Similarly, we can convert EXACTFL nodes to EXACTFU if they |
| 11745 | * contain only above-Latin1 characters (hence must be in UTF8), |
| 11746 | * which don't participate in folds with Latin1-range characters, |
| 11747 | * as the latter's folds aren't known until runtime. (We don't |
| 11748 | * need to figure this out until pass 2) */ |
| 11749 | bool maybe_exactfu = PASS2 |
| 11750 | && (node_type == EXACTF || node_type == EXACTFL); |
| 11751 | |
| 11752 | /* If a folding node contains only code points that don't |
| 11753 | * participate in folds, it can be changed into an EXACT node, |
| 11754 | * which allows the optimizer more things to look for */ |
| 11755 | bool maybe_exact; |
| 11756 | |
| 11757 | ret = reg_node(pRExC_state, node_type); |
| 11758 | |
| 11759 | /* In pass1, folded, we use a temporary buffer instead of the |
| 11760 | * actual node, as the node doesn't exist yet */ |
| 11761 | s = (SIZE_ONLY && FOLD) ? foldbuf : STRING(ret); |
| 11762 | |
| 11763 | s0 = s; |
| 11764 | |
| 11765 | reparse: |
| 11766 | |
| 11767 | /* We do the EXACTFish to EXACT node only if folding. (And we |
| 11768 | * don't need to figure this out until pass 2) */ |
| 11769 | maybe_exact = FOLD && PASS2; |
| 11770 | |
| 11771 | /* XXX The node can hold up to 255 bytes, yet this only goes to |
| 11772 | * 127. I (khw) do not know why. Keeping it somewhat less than |
| 11773 | * 255 allows us to not have to worry about overflow due to |
| 11774 | * converting to utf8 and fold expansion, but that value is |
| 11775 | * 255-UTF8_MAXBYTES_CASE. join_exact() may join adjacent nodes |
| 11776 | * split up by this limit into a single one using the real max of |
| 11777 | * 255. Even at 127, this breaks under rare circumstances. If |
| 11778 | * folding, we do not want to split a node at a character that is a |
| 11779 | * non-final in a multi-char fold, as an input string could just |
| 11780 | * happen to want to match across the node boundary. The join |
| 11781 | * would solve that problem if the join actually happens. But a |
| 11782 | * series of more than two nodes in a row each of 127 would cause |
| 11783 | * the first join to succeed to get to 254, but then there wouldn't |
| 11784 | * be room for the next one, which could at be one of those split |
| 11785 | * multi-char folds. I don't know of any fool-proof solution. One |
| 11786 | * could back off to end with only a code point that isn't such a |
| 11787 | * non-final, but it is possible for there not to be any in the |
| 11788 | * entire node. */ |
| 11789 | for (p = RExC_parse - 1; |
| 11790 | len < upper_parse && p < RExC_end; |
| 11791 | len++) |
| 11792 | { |
| 11793 | oldp = p; |
| 11794 | |
| 11795 | if (RExC_flags & RXf_PMf_EXTENDED) |
| 11796 | p = regpatws(pRExC_state, p, |
| 11797 | TRUE); /* means recognize comments */ |
| 11798 | switch ((U8)*p) { |
| 11799 | case '^': |
| 11800 | case '$': |
| 11801 | case '.': |
| 11802 | case '[': |
| 11803 | case '(': |
| 11804 | case ')': |
| 11805 | case '|': |
| 11806 | goto loopdone; |
| 11807 | case '\\': |
| 11808 | /* Literal Escapes Switch |
| 11809 | |
| 11810 | This switch is meant to handle escape sequences that |
| 11811 | resolve to a literal character. |
| 11812 | |
| 11813 | Every escape sequence that represents something |
| 11814 | else, like an assertion or a char class, is handled |
| 11815 | in the switch marked 'Special Escapes' above in this |
| 11816 | routine, but also has an entry here as anything that |
| 11817 | isn't explicitly mentioned here will be treated as |
| 11818 | an unescaped equivalent literal. |
| 11819 | */ |
| 11820 | |
| 11821 | switch ((U8)*++p) { |
| 11822 | /* These are all the special escapes. */ |
| 11823 | case 'A': /* Start assertion */ |
| 11824 | case 'b': case 'B': /* Word-boundary assertion*/ |
| 11825 | case 'C': /* Single char !DANGEROUS! */ |
| 11826 | case 'd': case 'D': /* digit class */ |
| 11827 | case 'g': case 'G': /* generic-backref, pos assertion */ |
| 11828 | case 'h': case 'H': /* HORIZWS */ |
| 11829 | case 'k': case 'K': /* named backref, keep marker */ |
| 11830 | case 'p': case 'P': /* Unicode property */ |
| 11831 | case 'R': /* LNBREAK */ |
| 11832 | case 's': case 'S': /* space class */ |
| 11833 | case 'v': case 'V': /* VERTWS */ |
| 11834 | case 'w': case 'W': /* word class */ |
| 11835 | case 'X': /* eXtended Unicode "combining |
| 11836 | character sequence" */ |
| 11837 | case 'z': case 'Z': /* End of line/string assertion */ |
| 11838 | --p; |
| 11839 | goto loopdone; |
| 11840 | |
| 11841 | /* Anything after here is an escape that resolves to a |
| 11842 | literal. (Except digits, which may or may not) |
| 11843 | */ |
| 11844 | case 'n': |
| 11845 | ender = '\n'; |
| 11846 | p++; |
| 11847 | break; |
| 11848 | case 'N': /* Handle a single-code point named character. */ |
| 11849 | /* The options cause it to fail if a multiple code |
| 11850 | * point sequence. Handle those in the switch() above |
| 11851 | * */ |
| 11852 | RExC_parse = p + 1; |
| 11853 | if (! grok_bslash_N(pRExC_state, NULL, &ender, |
| 11854 | flagp, depth, FALSE, |
| 11855 | FALSE /* not strict */ )) |
| 11856 | { |
| 11857 | if (*flagp & RESTART_UTF8) |
| 11858 | FAIL("panic: grok_bslash_N set RESTART_UTF8"); |
| 11859 | RExC_parse = p = oldp; |
| 11860 | goto loopdone; |
| 11861 | } |
| 11862 | p = RExC_parse; |
| 11863 | if (ender > 0xff) { |
| 11864 | REQUIRE_UTF8; |
| 11865 | } |
| 11866 | break; |
| 11867 | case 'r': |
| 11868 | ender = '\r'; |
| 11869 | p++; |
| 11870 | break; |
| 11871 | case 't': |
| 11872 | ender = '\t'; |
| 11873 | p++; |
| 11874 | break; |
| 11875 | case 'f': |
| 11876 | ender = '\f'; |
| 11877 | p++; |
| 11878 | break; |
| 11879 | case 'e': |
| 11880 | ender = ESC_NATIVE; |
| 11881 | p++; |
| 11882 | break; |
| 11883 | case 'a': |
| 11884 | ender = '\a'; |
| 11885 | p++; |
| 11886 | break; |
| 11887 | case 'o': |
| 11888 | { |
| 11889 | UV result; |
| 11890 | const char* error_msg; |
| 11891 | |
| 11892 | bool valid = grok_bslash_o(&p, |
| 11893 | &result, |
| 11894 | &error_msg, |
| 11895 | TRUE, /* out warnings */ |
| 11896 | FALSE, /* not strict */ |
| 11897 | TRUE, /* Output warnings |
| 11898 | for non- |
| 11899 | portables */ |
| 11900 | UTF); |
| 11901 | if (! valid) { |
| 11902 | RExC_parse = p; /* going to die anyway; point |
| 11903 | to exact spot of failure */ |
| 11904 | vFAIL(error_msg); |
| 11905 | } |
| 11906 | ender = result; |
| 11907 | if (PL_encoding && ender < 0x100) { |
| 11908 | goto recode_encoding; |
| 11909 | } |
| 11910 | if (ender > 0xff) { |
| 11911 | REQUIRE_UTF8; |
| 11912 | } |
| 11913 | break; |
| 11914 | } |
| 11915 | case 'x': |
| 11916 | { |
| 11917 | UV result = UV_MAX; /* initialize to erroneous |
| 11918 | value */ |
| 11919 | const char* error_msg; |
| 11920 | |
| 11921 | bool valid = grok_bslash_x(&p, |
| 11922 | &result, |
| 11923 | &error_msg, |
| 11924 | TRUE, /* out warnings */ |
| 11925 | FALSE, /* not strict */ |
| 11926 | TRUE, /* Output warnings |
| 11927 | for non- |
| 11928 | portables */ |
| 11929 | UTF); |
| 11930 | if (! valid) { |
| 11931 | RExC_parse = p; /* going to die anyway; point |
| 11932 | to exact spot of failure */ |
| 11933 | vFAIL(error_msg); |
| 11934 | } |
| 11935 | ender = result; |
| 11936 | |
| 11937 | if (PL_encoding && ender < 0x100) { |
| 11938 | goto recode_encoding; |
| 11939 | } |
| 11940 | if (ender > 0xff) { |
| 11941 | REQUIRE_UTF8; |
| 11942 | } |
| 11943 | break; |
| 11944 | } |
| 11945 | case 'c': |
| 11946 | p++; |
| 11947 | ender = grok_bslash_c(*p++, SIZE_ONLY); |
| 11948 | break; |
| 11949 | case '8': case '9': /* must be a backreference */ |
| 11950 | --p; |
| 11951 | goto loopdone; |
| 11952 | case '1': case '2': case '3':case '4': |
| 11953 | case '5': case '6': case '7': |
| 11954 | /* When we parse backslash escapes there is ambiguity |
| 11955 | * between backreferences and octal escapes. Any escape |
| 11956 | * from \1 - \9 is a backreference, any multi-digit |
| 11957 | * escape which does not start with 0 and which when |
| 11958 | * evaluated as decimal could refer to an already |
| 11959 | * parsed capture buffer is a backslash. Anything else |
| 11960 | * is octal. |
| 11961 | * |
| 11962 | * Note this implies that \118 could be interpreted as |
| 11963 | * 118 OR as "\11" . "8" depending on whether there |
| 11964 | * were 118 capture buffers defined already in the |
| 11965 | * pattern. */ |
| 11966 | |
| 11967 | /* NOTE, RExC_npar is 1 more than the actual number of |
| 11968 | * parens we have seen so far, hence the < RExC_npar below. */ |
| 11969 | |
| 11970 | if ( !isDIGIT(p[1]) || S_backref_value(p) < RExC_npar) |
| 11971 | { /* Not to be treated as an octal constant, go |
| 11972 | find backref */ |
| 11973 | --p; |
| 11974 | goto loopdone; |
| 11975 | } |
| 11976 | /* FALLTHROUGH */ |
| 11977 | case '0': |
| 11978 | { |
| 11979 | I32 flags = PERL_SCAN_SILENT_ILLDIGIT; |
| 11980 | STRLEN numlen = 3; |
| 11981 | ender = grok_oct(p, &numlen, &flags, NULL); |
| 11982 | if (ender > 0xff) { |
| 11983 | REQUIRE_UTF8; |
| 11984 | } |
| 11985 | p += numlen; |
| 11986 | if (SIZE_ONLY /* like \08, \178 */ |
| 11987 | && numlen < 3 |
| 11988 | && p < RExC_end |
| 11989 | && isDIGIT(*p) && ckWARN(WARN_REGEXP)) |
| 11990 | { |
| 11991 | reg_warn_non_literal_string( |
| 11992 | p + 1, |
| 11993 | form_short_octal_warning(p, numlen)); |
| 11994 | } |
| 11995 | } |
| 11996 | if (PL_encoding && ender < 0x100) |
| 11997 | goto recode_encoding; |
| 11998 | break; |
| 11999 | recode_encoding: |
| 12000 | if (! RExC_override_recoding) { |
| 12001 | SV* enc = PL_encoding; |
| 12002 | ender = reg_recode((const char)(U8)ender, &enc); |
| 12003 | if (!enc && SIZE_ONLY) |
| 12004 | ckWARNreg(p, "Invalid escape in the specified encoding"); |
| 12005 | REQUIRE_UTF8; |
| 12006 | } |
| 12007 | break; |
| 12008 | case '\0': |
| 12009 | if (p >= RExC_end) |
| 12010 | FAIL("Trailing \\"); |
| 12011 | /* FALLTHROUGH */ |
| 12012 | default: |
| 12013 | if (!SIZE_ONLY&& isALPHANUMERIC(*p)) { |
| 12014 | /* Include any { following the alpha to emphasize |
| 12015 | * that it could be part of an escape at some point |
| 12016 | * in the future */ |
| 12017 | int len = (isALPHA(*p) && *(p + 1) == '{') ? 2 : 1; |
| 12018 | ckWARN3reg(p + len, "Unrecognized escape \\%.*s passed through", len, p); |
| 12019 | } |
| 12020 | goto normal_default; |
| 12021 | } /* End of switch on '\' */ |
| 12022 | break; |
| 12023 | case '{': |
| 12024 | /* Currently we don't warn when the lbrace is at the start |
| 12025 | * of a construct. This catches it in the middle of a |
| 12026 | * literal string, or when its the first thing after |
| 12027 | * something like "\b" */ |
| 12028 | if (! SIZE_ONLY |
| 12029 | && (len || (p > RExC_start && isALPHA_A(*(p -1))))) |
| 12030 | { |
| 12031 | ckWARNregdep(p + 1, "Unescaped left brace in regex is deprecated, passed through"); |
| 12032 | } |
| 12033 | /*FALLTHROUGH*/ |
| 12034 | default: /* A literal character */ |
| 12035 | normal_default: |
| 12036 | if (UTF8_IS_START(*p) && UTF) { |
| 12037 | STRLEN numlen; |
| 12038 | ender = utf8n_to_uvchr((U8*)p, RExC_end - p, |
| 12039 | &numlen, UTF8_ALLOW_DEFAULT); |
| 12040 | p += numlen; |
| 12041 | } |
| 12042 | else |
| 12043 | ender = (U8) *p++; |
| 12044 | break; |
| 12045 | } /* End of switch on the literal */ |
| 12046 | |
| 12047 | /* Here, have looked at the literal character and <ender> |
| 12048 | * contains its ordinal, <p> points to the character after it |
| 12049 | */ |
| 12050 | |
| 12051 | if ( RExC_flags & RXf_PMf_EXTENDED) |
| 12052 | p = regpatws(pRExC_state, p, |
| 12053 | TRUE); /* means recognize comments */ |
| 12054 | |
| 12055 | /* If the next thing is a quantifier, it applies to this |
| 12056 | * character only, which means that this character has to be in |
| 12057 | * its own node and can't just be appended to the string in an |
| 12058 | * existing node, so if there are already other characters in |
| 12059 | * the node, close the node with just them, and set up to do |
| 12060 | * this character again next time through, when it will be the |
| 12061 | * only thing in its new node */ |
| 12062 | if ((next_is_quantifier = (p < RExC_end && ISMULT2(p))) && len) |
| 12063 | { |
| 12064 | p = oldp; |
| 12065 | goto loopdone; |
| 12066 | } |
| 12067 | |
| 12068 | if (! FOLD /* The simple case, just append the literal */ |
| 12069 | || (LOC /* Also don't fold for tricky chars under /l */ |
| 12070 | && is_PROBLEMATIC_LOCALE_FOLD_cp(ender))) |
| 12071 | { |
| 12072 | if (UTF) { |
| 12073 | const STRLEN unilen = reguni(pRExC_state, ender, s); |
| 12074 | if (unilen > 0) { |
| 12075 | s += unilen; |
| 12076 | len += unilen; |
| 12077 | } |
| 12078 | |
| 12079 | /* The loop increments <len> each time, as all but this |
| 12080 | * path (and one other) through it add a single byte to |
| 12081 | * the EXACTish node. But this one has changed len to |
| 12082 | * be the correct final value, so subtract one to |
| 12083 | * cancel out the increment that follows */ |
| 12084 | len--; |
| 12085 | } |
| 12086 | else { |
| 12087 | REGC((char)ender, s++); |
| 12088 | } |
| 12089 | |
| 12090 | /* Can get here if folding only if is one of the /l |
| 12091 | * characters whose fold depends on the locale. The |
| 12092 | * occurrence of any of these indicate that we can't |
| 12093 | * simplify things */ |
| 12094 | if (FOLD) { |
| 12095 | maybe_exact = FALSE; |
| 12096 | maybe_exactfu = FALSE; |
| 12097 | } |
| 12098 | } |
| 12099 | else /* FOLD */ |
| 12100 | if (! ( UTF |
| 12101 | /* See comments for join_exact() as to why we fold this |
| 12102 | * non-UTF at compile time */ |
| 12103 | || (node_type == EXACTFU |
| 12104 | && ender == LATIN_SMALL_LETTER_SHARP_S))) |
| 12105 | { |
| 12106 | /* Here, are folding and are not UTF-8 encoded; therefore |
| 12107 | * the character must be in the range 0-255, and is not /l |
| 12108 | * (Not /l because we already handled these under /l in |
| 12109 | * is_PROBLEMATIC_LOCALE_FOLD_cp */ |
| 12110 | if (IS_IN_SOME_FOLD_L1(ender)) { |
| 12111 | maybe_exact = FALSE; |
| 12112 | |
| 12113 | /* See if the character's fold differs between /d and |
| 12114 | * /u. This includes the multi-char fold SHARP S to |
| 12115 | * 'ss' */ |
| 12116 | if (maybe_exactfu |
| 12117 | && (PL_fold[ender] != PL_fold_latin1[ender] |
| 12118 | || ender == LATIN_SMALL_LETTER_SHARP_S |
| 12119 | || (len > 0 |
| 12120 | && isALPHA_FOLD_EQ(ender, 's') |
| 12121 | && isALPHA_FOLD_EQ(*(s-1), 's')))) |
| 12122 | { |
| 12123 | maybe_exactfu = FALSE; |
| 12124 | } |
| 12125 | } |
| 12126 | |
| 12127 | /* Even when folding, we store just the input character, as |
| 12128 | * we have an array that finds its fold quickly */ |
| 12129 | *(s++) = (char) ender; |
| 12130 | } |
| 12131 | else { /* FOLD and UTF */ |
| 12132 | /* Unlike the non-fold case, we do actually have to |
| 12133 | * calculate the results here in pass 1. This is for two |
| 12134 | * reasons, the folded length may be longer than the |
| 12135 | * unfolded, and we have to calculate how many EXACTish |
| 12136 | * nodes it will take; and we may run out of room in a node |
| 12137 | * in the middle of a potential multi-char fold, and have |
| 12138 | * to back off accordingly. (Hence we can't use REGC for |
| 12139 | * the simple case just below.) */ |
| 12140 | |
| 12141 | UV folded; |
| 12142 | if (isASCII(ender)) { |
| 12143 | folded = toFOLD(ender); |
| 12144 | *(s)++ = (U8) folded; |
| 12145 | } |
| 12146 | else { |
| 12147 | STRLEN foldlen; |
| 12148 | |
| 12149 | folded = _to_uni_fold_flags( |
| 12150 | ender, |
| 12151 | (U8 *) s, |
| 12152 | &foldlen, |
| 12153 | FOLD_FLAGS_FULL | ((ASCII_FOLD_RESTRICTED) |
| 12154 | ? FOLD_FLAGS_NOMIX_ASCII |
| 12155 | : 0)); |
| 12156 | s += foldlen; |
| 12157 | |
| 12158 | /* The loop increments <len> each time, as all but this |
| 12159 | * path (and one other) through it add a single byte to |
| 12160 | * the EXACTish node. But this one has changed len to |
| 12161 | * be the correct final value, so subtract one to |
| 12162 | * cancel out the increment that follows */ |
| 12163 | len += foldlen - 1; |
| 12164 | } |
| 12165 | /* If this node only contains non-folding code points so |
| 12166 | * far, see if this new one is also non-folding */ |
| 12167 | if (maybe_exact) { |
| 12168 | if (folded != ender) { |
| 12169 | maybe_exact = FALSE; |
| 12170 | } |
| 12171 | else { |
| 12172 | /* Here the fold is the original; we have to check |
| 12173 | * further to see if anything folds to it */ |
| 12174 | if (_invlist_contains_cp(PL_utf8_foldable, |
| 12175 | ender)) |
| 12176 | { |
| 12177 | maybe_exact = FALSE; |
| 12178 | } |
| 12179 | } |
| 12180 | } |
| 12181 | ender = folded; |
| 12182 | } |
| 12183 | |
| 12184 | if (next_is_quantifier) { |
| 12185 | |
| 12186 | /* Here, the next input is a quantifier, and to get here, |
| 12187 | * the current character is the only one in the node. |
| 12188 | * Also, here <len> doesn't include the final byte for this |
| 12189 | * character */ |
| 12190 | len++; |
| 12191 | goto loopdone; |
| 12192 | } |
| 12193 | |
| 12194 | } /* End of loop through literal characters */ |
| 12195 | |
| 12196 | /* Here we have either exhausted the input or ran out of room in |
| 12197 | * the node. (If we encountered a character that can't be in the |
| 12198 | * node, transfer is made directly to <loopdone>, and so we |
| 12199 | * wouldn't have fallen off the end of the loop.) In the latter |
| 12200 | * case, we artificially have to split the node into two, because |
| 12201 | * we just don't have enough space to hold everything. This |
| 12202 | * creates a problem if the final character participates in a |
| 12203 | * multi-character fold in the non-final position, as a match that |
| 12204 | * should have occurred won't, due to the way nodes are matched, |
| 12205 | * and our artificial boundary. So back off until we find a non- |
| 12206 | * problematic character -- one that isn't at the beginning or |
| 12207 | * middle of such a fold. (Either it doesn't participate in any |
| 12208 | * folds, or appears only in the final position of all the folds it |
| 12209 | * does participate in.) A better solution with far fewer false |
| 12210 | * positives, and that would fill the nodes more completely, would |
| 12211 | * be to actually have available all the multi-character folds to |
| 12212 | * test against, and to back-off only far enough to be sure that |
| 12213 | * this node isn't ending with a partial one. <upper_parse> is set |
| 12214 | * further below (if we need to reparse the node) to include just |
| 12215 | * up through that final non-problematic character that this code |
| 12216 | * identifies, so when it is set to less than the full node, we can |
| 12217 | * skip the rest of this */ |
| 12218 | if (FOLD && p < RExC_end && upper_parse == MAX_NODE_STRING_SIZE) { |
| 12219 | |
| 12220 | const STRLEN full_len = len; |
| 12221 | |
| 12222 | assert(len >= MAX_NODE_STRING_SIZE); |
| 12223 | |
| 12224 | /* Here, <s> points to the final byte of the final character. |
| 12225 | * Look backwards through the string until find a non- |
| 12226 | * problematic character */ |
| 12227 | |
| 12228 | if (! UTF) { |
| 12229 | |
| 12230 | /* This has no multi-char folds to non-UTF characters */ |
| 12231 | if (ASCII_FOLD_RESTRICTED) { |
| 12232 | goto loopdone; |
| 12233 | } |
| 12234 | |
| 12235 | while (--s >= s0 && IS_NON_FINAL_FOLD(*s)) { } |
| 12236 | len = s - s0 + 1; |
| 12237 | } |
| 12238 | else { |
| 12239 | if (! PL_NonL1NonFinalFold) { |
| 12240 | PL_NonL1NonFinalFold = _new_invlist_C_array( |
| 12241 | NonL1_Perl_Non_Final_Folds_invlist); |
| 12242 | } |
| 12243 | |
| 12244 | /* Point to the first byte of the final character */ |
| 12245 | s = (char *) utf8_hop((U8 *) s, -1); |
| 12246 | |
| 12247 | while (s >= s0) { /* Search backwards until find |
| 12248 | non-problematic char */ |
| 12249 | if (UTF8_IS_INVARIANT(*s)) { |
| 12250 | |
| 12251 | /* There are no ascii characters that participate |
| 12252 | * in multi-char folds under /aa. In EBCDIC, the |
| 12253 | * non-ascii invariants are all control characters, |
| 12254 | * so don't ever participate in any folds. */ |
| 12255 | if (ASCII_FOLD_RESTRICTED |
| 12256 | || ! IS_NON_FINAL_FOLD(*s)) |
| 12257 | { |
| 12258 | break; |
| 12259 | } |
| 12260 | } |
| 12261 | else if (UTF8_IS_DOWNGRADEABLE_START(*s)) { |
| 12262 | if (! IS_NON_FINAL_FOLD(TWO_BYTE_UTF8_TO_NATIVE( |
| 12263 | *s, *(s+1)))) |
| 12264 | { |
| 12265 | break; |
| 12266 | } |
| 12267 | } |
| 12268 | else if (! _invlist_contains_cp( |
| 12269 | PL_NonL1NonFinalFold, |
| 12270 | valid_utf8_to_uvchr((U8 *) s, NULL))) |
| 12271 | { |
| 12272 | break; |
| 12273 | } |
| 12274 | |
| 12275 | /* Here, the current character is problematic in that |
| 12276 | * it does occur in the non-final position of some |
| 12277 | * fold, so try the character before it, but have to |
| 12278 | * special case the very first byte in the string, so |
| 12279 | * we don't read outside the string */ |
| 12280 | s = (s == s0) ? s -1 : (char *) utf8_hop((U8 *) s, -1); |
| 12281 | } /* End of loop backwards through the string */ |
| 12282 | |
| 12283 | /* If there were only problematic characters in the string, |
| 12284 | * <s> will point to before s0, in which case the length |
| 12285 | * should be 0, otherwise include the length of the |
| 12286 | * non-problematic character just found */ |
| 12287 | len = (s < s0) ? 0 : s - s0 + UTF8SKIP(s); |
| 12288 | } |
| 12289 | |
| 12290 | /* Here, have found the final character, if any, that is |
| 12291 | * non-problematic as far as ending the node without splitting |
| 12292 | * it across a potential multi-char fold. <len> contains the |
| 12293 | * number of bytes in the node up-to and including that |
| 12294 | * character, or is 0 if there is no such character, meaning |
| 12295 | * the whole node contains only problematic characters. In |
| 12296 | * this case, give up and just take the node as-is. We can't |
| 12297 | * do any better */ |
| 12298 | if (len == 0) { |
| 12299 | len = full_len; |
| 12300 | |
| 12301 | /* If the node ends in an 's' we make sure it stays EXACTF, |
| 12302 | * as if it turns into an EXACTFU, it could later get |
| 12303 | * joined with another 's' that would then wrongly match |
| 12304 | * the sharp s */ |
| 12305 | if (maybe_exactfu && isALPHA_FOLD_EQ(ender, 's')) |
| 12306 | { |
| 12307 | maybe_exactfu = FALSE; |
| 12308 | } |
| 12309 | } else { |
| 12310 | |
| 12311 | /* Here, the node does contain some characters that aren't |
| 12312 | * problematic. If one such is the final character in the |
| 12313 | * node, we are done */ |
| 12314 | if (len == full_len) { |
| 12315 | goto loopdone; |
| 12316 | } |
| 12317 | else if (len + ((UTF) ? UTF8SKIP(s) : 1) == full_len) { |
| 12318 | |
| 12319 | /* If the final character is problematic, but the |
| 12320 | * penultimate is not, back-off that last character to |
| 12321 | * later start a new node with it */ |
| 12322 | p = oldp; |
| 12323 | goto loopdone; |
| 12324 | } |
| 12325 | |
| 12326 | /* Here, the final non-problematic character is earlier |
| 12327 | * in the input than the penultimate character. What we do |
| 12328 | * is reparse from the beginning, going up only as far as |
| 12329 | * this final ok one, thus guaranteeing that the node ends |
| 12330 | * in an acceptable character. The reason we reparse is |
| 12331 | * that we know how far in the character is, but we don't |
| 12332 | * know how to correlate its position with the input parse. |
| 12333 | * An alternate implementation would be to build that |
| 12334 | * correlation as we go along during the original parse, |
| 12335 | * but that would entail extra work for every node, whereas |
| 12336 | * this code gets executed only when the string is too |
| 12337 | * large for the node, and the final two characters are |
| 12338 | * problematic, an infrequent occurrence. Yet another |
| 12339 | * possible strategy would be to save the tail of the |
| 12340 | * string, and the next time regatom is called, initialize |
| 12341 | * with that. The problem with this is that unless you |
| 12342 | * back off one more character, you won't be guaranteed |
| 12343 | * regatom will get called again, unless regbranch, |
| 12344 | * regpiece ... are also changed. If you do back off that |
| 12345 | * extra character, so that there is input guaranteed to |
| 12346 | * force calling regatom, you can't handle the case where |
| 12347 | * just the first character in the node is acceptable. I |
| 12348 | * (khw) decided to try this method which doesn't have that |
| 12349 | * pitfall; if performance issues are found, we can do a |
| 12350 | * combination of the current approach plus that one */ |
| 12351 | upper_parse = len; |
| 12352 | len = 0; |
| 12353 | s = s0; |
| 12354 | goto reparse; |
| 12355 | } |
| 12356 | } /* End of verifying node ends with an appropriate char */ |
| 12357 | |
| 12358 | loopdone: /* Jumped to when encounters something that shouldn't be in |
| 12359 | the node */ |
| 12360 | |
| 12361 | /* I (khw) don't know if you can get here with zero length, but the |
| 12362 | * old code handled this situation by creating a zero-length EXACT |
| 12363 | * node. Might as well be NOTHING instead */ |
| 12364 | if (len == 0) { |
| 12365 | OP(ret) = NOTHING; |
| 12366 | } |
| 12367 | else { |
| 12368 | if (FOLD) { |
| 12369 | /* If 'maybe_exact' is still set here, means there are no |
| 12370 | * code points in the node that participate in folds; |
| 12371 | * similarly for 'maybe_exactfu' and code points that match |
| 12372 | * differently depending on UTF8ness of the target string |
| 12373 | * (for /u), or depending on locale for /l */ |
| 12374 | if (maybe_exact) { |
| 12375 | OP(ret) = EXACT; |
| 12376 | } |
| 12377 | else if (maybe_exactfu) { |
| 12378 | OP(ret) = EXACTFU; |
| 12379 | } |
| 12380 | } |
| 12381 | alloc_maybe_populate_EXACT(pRExC_state, ret, flagp, len, ender, |
| 12382 | FALSE /* Don't look to see if could |
| 12383 | be turned into an EXACT |
| 12384 | node, as we have already |
| 12385 | computed that */ |
| 12386 | ); |
| 12387 | } |
| 12388 | |
| 12389 | RExC_parse = p - 1; |
| 12390 | Set_Node_Cur_Length(ret, parse_start); |
| 12391 | nextchar(pRExC_state); |
| 12392 | { |
| 12393 | /* len is STRLEN which is unsigned, need to copy to signed */ |
| 12394 | IV iv = len; |
| 12395 | if (iv < 0) |
| 12396 | vFAIL("Internal disaster"); |
| 12397 | } |
| 12398 | |
| 12399 | } /* End of label 'defchar:' */ |
| 12400 | break; |
| 12401 | } /* End of giant switch on input character */ |
| 12402 | |
| 12403 | return(ret); |
| 12404 | } |
| 12405 | |
| 12406 | STATIC char * |
| 12407 | S_regpatws(RExC_state_t *pRExC_state, char *p , const bool recognize_comment ) |
| 12408 | { |
| 12409 | /* Returns the next non-pattern-white space, non-comment character (the |
| 12410 | * latter only if 'recognize_comment is true) in the string p, which is |
| 12411 | * ended by RExC_end. See also reg_skipcomment */ |
| 12412 | const char *e = RExC_end; |
| 12413 | |
| 12414 | PERL_ARGS_ASSERT_REGPATWS; |
| 12415 | |
| 12416 | while (p < e) { |
| 12417 | STRLEN len; |
| 12418 | if ((len = is_PATWS_safe(p, e, UTF))) { |
| 12419 | p += len; |
| 12420 | } |
| 12421 | else if (recognize_comment && *p == '#') { |
| 12422 | p = reg_skipcomment(pRExC_state, p); |
| 12423 | } |
| 12424 | else |
| 12425 | break; |
| 12426 | } |
| 12427 | return p; |
| 12428 | } |
| 12429 | |
| 12430 | STATIC void |
| 12431 | S_populate_ANYOF_from_invlist(pTHX_ regnode *node, SV** invlist_ptr) |
| 12432 | { |
| 12433 | /* Uses the inversion list '*invlist_ptr' to populate the ANYOF 'node'. It |
| 12434 | * sets up the bitmap and any flags, removing those code points from the |
| 12435 | * inversion list, setting it to NULL should it become completely empty */ |
| 12436 | |
| 12437 | PERL_ARGS_ASSERT_POPULATE_ANYOF_FROM_INVLIST; |
| 12438 | assert(PL_regkind[OP(node)] == ANYOF); |
| 12439 | |
| 12440 | ANYOF_BITMAP_ZERO(node); |
| 12441 | if (*invlist_ptr) { |
| 12442 | |
| 12443 | /* This gets set if we actually need to modify things */ |
| 12444 | bool change_invlist = FALSE; |
| 12445 | |
| 12446 | UV start, end; |
| 12447 | |
| 12448 | /* Start looking through *invlist_ptr */ |
| 12449 | invlist_iterinit(*invlist_ptr); |
| 12450 | while (invlist_iternext(*invlist_ptr, &start, &end)) { |
| 12451 | UV high; |
| 12452 | int i; |
| 12453 | |
| 12454 | if (end == UV_MAX && start <= 256) { |
| 12455 | ANYOF_FLAGS(node) |= ANYOF_ABOVE_LATIN1_ALL; |
| 12456 | } |
| 12457 | else if (end >= 256) { |
| 12458 | ANYOF_FLAGS(node) |= ANYOF_UTF8; |
| 12459 | } |
| 12460 | |
| 12461 | /* Quit if are above what we should change */ |
| 12462 | if (start >= NUM_ANYOF_CODE_POINTS) { |
| 12463 | break; |
| 12464 | } |
| 12465 | |
| 12466 | change_invlist = TRUE; |
| 12467 | |
| 12468 | /* Set all the bits in the range, up to the max that we are doing */ |
| 12469 | high = (end < NUM_ANYOF_CODE_POINTS - 1) |
| 12470 | ? end |
| 12471 | : NUM_ANYOF_CODE_POINTS - 1; |
| 12472 | for (i = start; i <= (int) high; i++) { |
| 12473 | if (! ANYOF_BITMAP_TEST(node, i)) { |
| 12474 | ANYOF_BITMAP_SET(node, i); |
| 12475 | } |
| 12476 | } |
| 12477 | } |
| 12478 | invlist_iterfinish(*invlist_ptr); |
| 12479 | |
| 12480 | /* Done with loop; remove any code points that are in the bitmap from |
| 12481 | * *invlist_ptr; similarly for code points above latin1 if we have a |
| 12482 | * flag to match all of them anyways */ |
| 12483 | if (change_invlist) { |
| 12484 | _invlist_subtract(*invlist_ptr, PL_Latin1, invlist_ptr); |
| 12485 | } |
| 12486 | if (ANYOF_FLAGS(node) & ANYOF_ABOVE_LATIN1_ALL) { |
| 12487 | _invlist_intersection(*invlist_ptr, PL_Latin1, invlist_ptr); |
| 12488 | } |
| 12489 | |
| 12490 | /* If have completely emptied it, remove it completely */ |
| 12491 | if (_invlist_len(*invlist_ptr) == 0) { |
| 12492 | SvREFCNT_dec_NN(*invlist_ptr); |
| 12493 | *invlist_ptr = NULL; |
| 12494 | } |
| 12495 | } |
| 12496 | } |
| 12497 | |
| 12498 | /* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]]. |
| 12499 | Character classes ([:foo:]) can also be negated ([:^foo:]). |
| 12500 | Returns a named class id (ANYOF_XXX) if successful, -1 otherwise. |
| 12501 | Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed, |
| 12502 | but trigger failures because they are currently unimplemented. */ |
| 12503 | |
| 12504 | #define POSIXCC_DONE(c) ((c) == ':') |
| 12505 | #define POSIXCC_NOTYET(c) ((c) == '=' || (c) == '.') |
| 12506 | #define POSIXCC(c) (POSIXCC_DONE(c) || POSIXCC_NOTYET(c)) |
| 12507 | |
| 12508 | PERL_STATIC_INLINE I32 |
| 12509 | S_regpposixcc(pTHX_ RExC_state_t *pRExC_state, I32 value, const bool strict) |
| 12510 | { |
| 12511 | I32 namedclass = OOB_NAMEDCLASS; |
| 12512 | |
| 12513 | PERL_ARGS_ASSERT_REGPPOSIXCC; |
| 12514 | |
| 12515 | if (value == '[' && RExC_parse + 1 < RExC_end && |
| 12516 | /* I smell either [: or [= or [. -- POSIX has been here, right? */ |
| 12517 | POSIXCC(UCHARAT(RExC_parse))) |
| 12518 | { |
| 12519 | const char c = UCHARAT(RExC_parse); |
| 12520 | char* const s = RExC_parse++; |
| 12521 | |
| 12522 | while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != c) |
| 12523 | RExC_parse++; |
| 12524 | if (RExC_parse == RExC_end) { |
| 12525 | if (strict) { |
| 12526 | |
| 12527 | /* Try to give a better location for the error (than the end of |
| 12528 | * the string) by looking for the matching ']' */ |
| 12529 | RExC_parse = s; |
| 12530 | while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != ']') { |
| 12531 | RExC_parse++; |
| 12532 | } |
| 12533 | vFAIL2("Unmatched '%c' in POSIX class", c); |
| 12534 | } |
| 12535 | /* Grandfather lone [:, [=, [. */ |
| 12536 | RExC_parse = s; |
| 12537 | } |
| 12538 | else { |
| 12539 | const char* const t = RExC_parse++; /* skip over the c */ |
| 12540 | assert(*t == c); |
| 12541 | |
| 12542 | if (UCHARAT(RExC_parse) == ']') { |
| 12543 | const char *posixcc = s + 1; |
| 12544 | RExC_parse++; /* skip over the ending ] */ |
| 12545 | |
| 12546 | if (*s == ':') { |
| 12547 | const I32 complement = *posixcc == '^' ? *posixcc++ : 0; |
| 12548 | const I32 skip = t - posixcc; |
| 12549 | |
| 12550 | /* Initially switch on the length of the name. */ |
| 12551 | switch (skip) { |
| 12552 | case 4: |
| 12553 | if (memEQ(posixcc, "word", 4)) /* this is not POSIX, |
| 12554 | this is the Perl \w |
| 12555 | */ |
| 12556 | namedclass = ANYOF_WORDCHAR; |
| 12557 | break; |
| 12558 | case 5: |
| 12559 | /* Names all of length 5. */ |
| 12560 | /* alnum alpha ascii blank cntrl digit graph lower |
| 12561 | print punct space upper */ |
| 12562 | /* Offset 4 gives the best switch position. */ |
| 12563 | switch (posixcc[4]) { |
| 12564 | case 'a': |
| 12565 | if (memEQ(posixcc, "alph", 4)) /* alpha */ |
| 12566 | namedclass = ANYOF_ALPHA; |
| 12567 | break; |
| 12568 | case 'e': |
| 12569 | if (memEQ(posixcc, "spac", 4)) /* space */ |
| 12570 | namedclass = ANYOF_PSXSPC; |
| 12571 | break; |
| 12572 | case 'h': |
| 12573 | if (memEQ(posixcc, "grap", 4)) /* graph */ |
| 12574 | namedclass = ANYOF_GRAPH; |
| 12575 | break; |
| 12576 | case 'i': |
| 12577 | if (memEQ(posixcc, "asci", 4)) /* ascii */ |
| 12578 | namedclass = ANYOF_ASCII; |
| 12579 | break; |
| 12580 | case 'k': |
| 12581 | if (memEQ(posixcc, "blan", 4)) /* blank */ |
| 12582 | namedclass = ANYOF_BLANK; |
| 12583 | break; |
| 12584 | case 'l': |
| 12585 | if (memEQ(posixcc, "cntr", 4)) /* cntrl */ |
| 12586 | namedclass = ANYOF_CNTRL; |
| 12587 | break; |
| 12588 | case 'm': |
| 12589 | if (memEQ(posixcc, "alnu", 4)) /* alnum */ |
| 12590 | namedclass = ANYOF_ALPHANUMERIC; |
| 12591 | break; |
| 12592 | case 'r': |
| 12593 | if (memEQ(posixcc, "lowe", 4)) /* lower */ |
| 12594 | namedclass = (FOLD) ? ANYOF_CASED : ANYOF_LOWER; |
| 12595 | else if (memEQ(posixcc, "uppe", 4)) /* upper */ |
| 12596 | namedclass = (FOLD) ? ANYOF_CASED : ANYOF_UPPER; |
| 12597 | break; |
| 12598 | case 't': |
| 12599 | if (memEQ(posixcc, "digi", 4)) /* digit */ |
| 12600 | namedclass = ANYOF_DIGIT; |
| 12601 | else if (memEQ(posixcc, "prin", 4)) /* print */ |
| 12602 | namedclass = ANYOF_PRINT; |
| 12603 | else if (memEQ(posixcc, "punc", 4)) /* punct */ |
| 12604 | namedclass = ANYOF_PUNCT; |
| 12605 | break; |
| 12606 | } |
| 12607 | break; |
| 12608 | case 6: |
| 12609 | if (memEQ(posixcc, "xdigit", 6)) |
| 12610 | namedclass = ANYOF_XDIGIT; |
| 12611 | break; |
| 12612 | } |
| 12613 | |
| 12614 | if (namedclass == OOB_NAMEDCLASS) |
| 12615 | vFAIL2utf8f( |
| 12616 | "POSIX class [:%"UTF8f":] unknown", |
| 12617 | UTF8fARG(UTF, t - s - 1, s + 1)); |
| 12618 | |
| 12619 | /* The #defines are structured so each complement is +1 to |
| 12620 | * the normal one */ |
| 12621 | if (complement) { |
| 12622 | namedclass++; |
| 12623 | } |
| 12624 | assert (posixcc[skip] == ':'); |
| 12625 | assert (posixcc[skip+1] == ']'); |
| 12626 | } else if (!SIZE_ONLY) { |
| 12627 | /* [[=foo=]] and [[.foo.]] are still future. */ |
| 12628 | |
| 12629 | /* adjust RExC_parse so the warning shows after |
| 12630 | the class closes */ |
| 12631 | while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse) != ']') |
| 12632 | RExC_parse++; |
| 12633 | vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c); |
| 12634 | } |
| 12635 | } else { |
| 12636 | /* Maternal grandfather: |
| 12637 | * "[:" ending in ":" but not in ":]" */ |
| 12638 | if (strict) { |
| 12639 | vFAIL("Unmatched '[' in POSIX class"); |
| 12640 | } |
| 12641 | |
| 12642 | /* Grandfather lone [:, [=, [. */ |
| 12643 | RExC_parse = s; |
| 12644 | } |
| 12645 | } |
| 12646 | } |
| 12647 | |
| 12648 | return namedclass; |
| 12649 | } |
| 12650 | |
| 12651 | STATIC bool |
| 12652 | S_could_it_be_a_POSIX_class(RExC_state_t *pRExC_state) |
| 12653 | { |
| 12654 | /* This applies some heuristics at the current parse position (which should |
| 12655 | * be at a '[') to see if what follows might be intended to be a [:posix:] |
| 12656 | * class. It returns true if it really is a posix class, of course, but it |
| 12657 | * also can return true if it thinks that what was intended was a posix |
| 12658 | * class that didn't quite make it. |
| 12659 | * |
| 12660 | * It will return true for |
| 12661 | * [:alphanumerics: |
| 12662 | * [:alphanumerics] (as long as the ] isn't followed immediately by a |
| 12663 | * ')' indicating the end of the (?[ |
| 12664 | * [:any garbage including %^&$ punctuation:] |
| 12665 | * |
| 12666 | * This is designed to be called only from S_handle_regex_sets; it could be |
| 12667 | * easily adapted to be called from the spot at the beginning of regclass() |
| 12668 | * that checks to see in a normal bracketed class if the surrounding [] |
| 12669 | * have been omitted ([:word:] instead of [[:word:]]). But doing so would |
| 12670 | * change long-standing behavior, so I (khw) didn't do that */ |
| 12671 | char* p = RExC_parse + 1; |
| 12672 | char first_char = *p; |
| 12673 | |
| 12674 | PERL_ARGS_ASSERT_COULD_IT_BE_A_POSIX_CLASS; |
| 12675 | |
| 12676 | assert(*(p - 1) == '['); |
| 12677 | |
| 12678 | if (! POSIXCC(first_char)) { |
| 12679 | return FALSE; |
| 12680 | } |
| 12681 | |
| 12682 | p++; |
| 12683 | while (p < RExC_end && isWORDCHAR(*p)) p++; |
| 12684 | |
| 12685 | if (p >= RExC_end) { |
| 12686 | return FALSE; |
| 12687 | } |
| 12688 | |
| 12689 | if (p - RExC_parse > 2 /* Got at least 1 word character */ |
| 12690 | && (*p == first_char |
| 12691 | || (*p == ']' && p + 1 < RExC_end && *(p + 1) != ')'))) |
| 12692 | { |
| 12693 | return TRUE; |
| 12694 | } |
| 12695 | |
| 12696 | p = (char *) memchr(RExC_parse, ']', RExC_end - RExC_parse); |
| 12697 | |
| 12698 | return (p |
| 12699 | && p - RExC_parse > 2 /* [:] evaluates to colon; |
| 12700 | [::] is a bad posix class. */ |
| 12701 | && first_char == *(p - 1)); |
| 12702 | } |
| 12703 | |
| 12704 | STATIC regnode * |
| 12705 | S_handle_regex_sets(pTHX_ RExC_state_t *pRExC_state, SV** return_invlist, |
| 12706 | I32 *flagp, U32 depth, |
| 12707 | char * const oregcomp_parse) |
| 12708 | { |
| 12709 | /* Handle the (?[...]) construct to do set operations */ |
| 12710 | |
| 12711 | U8 curchar; |
| 12712 | UV start, end; /* End points of code point ranges */ |
| 12713 | SV* result_string; |
| 12714 | char *save_end, *save_parse; |
| 12715 | SV* final; |
| 12716 | STRLEN len; |
| 12717 | regnode* node; |
| 12718 | AV* stack; |
| 12719 | const bool save_fold = FOLD; |
| 12720 | |
| 12721 | GET_RE_DEBUG_FLAGS_DECL; |
| 12722 | |
| 12723 | PERL_ARGS_ASSERT_HANDLE_REGEX_SETS; |
| 12724 | |
| 12725 | if (LOC) { |
| 12726 | vFAIL("(?[...]) not valid in locale"); |
| 12727 | } |
| 12728 | RExC_uni_semantics = 1; |
| 12729 | |
| 12730 | /* This will return only an ANYOF regnode, or (unlikely) something smaller |
| 12731 | * (such as EXACT). Thus we can skip most everything if just sizing. We |
| 12732 | * call regclass to handle '[]' so as to not have to reinvent its parsing |
| 12733 | * rules here (throwing away the size it computes each time). And, we exit |
| 12734 | * upon an unescaped ']' that isn't one ending a regclass. To do both |
| 12735 | * these things, we need to realize that something preceded by a backslash |
| 12736 | * is escaped, so we have to keep track of backslashes */ |
| 12737 | if (SIZE_ONLY) { |
| 12738 | UV depth = 0; /* how many nested (?[...]) constructs */ |
| 12739 | |
| 12740 | Perl_ck_warner_d(aTHX_ |
| 12741 | packWARN(WARN_EXPERIMENTAL__REGEX_SETS), |
| 12742 | "The regex_sets feature is experimental" REPORT_LOCATION, |
| 12743 | UTF8fARG(UTF, (RExC_parse - RExC_precomp), RExC_precomp), |
| 12744 | UTF8fARG(UTF, |
| 12745 | RExC_end - RExC_start - (RExC_parse - RExC_precomp), |
| 12746 | RExC_precomp + (RExC_parse - RExC_precomp))); |
| 12747 | |
| 12748 | while (RExC_parse < RExC_end) { |
| 12749 | SV* current = NULL; |
| 12750 | RExC_parse = regpatws(pRExC_state, RExC_parse, |
| 12751 | TRUE); /* means recognize comments */ |
| 12752 | switch (*RExC_parse) { |
| 12753 | case '?': |
| 12754 | if (RExC_parse[1] == '[') depth++, RExC_parse++; |
| 12755 | /* FALLTHROUGH */ |
| 12756 | default: |
| 12757 | break; |
| 12758 | case '\\': |
| 12759 | /* Skip the next byte (which could cause us to end up in |
| 12760 | * the middle of a UTF-8 character, but since none of those |
| 12761 | * are confusable with anything we currently handle in this |
| 12762 | * switch (invariants all), it's safe. We'll just hit the |
| 12763 | * default: case next time and keep on incrementing until |
| 12764 | * we find one of the invariants we do handle. */ |
| 12765 | RExC_parse++; |
| 12766 | break; |
| 12767 | case '[': |
| 12768 | { |
| 12769 | /* If this looks like it is a [:posix:] class, leave the |
| 12770 | * parse pointer at the '[' to fool regclass() into |
| 12771 | * thinking it is part of a '[[:posix:]]'. That function |
| 12772 | * will use strict checking to force a syntax error if it |
| 12773 | * doesn't work out to a legitimate class */ |
| 12774 | bool is_posix_class |
| 12775 | = could_it_be_a_POSIX_class(pRExC_state); |
| 12776 | if (! is_posix_class) { |
| 12777 | RExC_parse++; |
| 12778 | } |
| 12779 | |
| 12780 | /* regclass() can only return RESTART_UTF8 if multi-char |
| 12781 | folds are allowed. */ |
| 12782 | if (!regclass(pRExC_state, flagp,depth+1, |
| 12783 | is_posix_class, /* parse the whole char |
| 12784 | class only if not a |
| 12785 | posix class */ |
| 12786 | FALSE, /* don't allow multi-char folds */ |
| 12787 | TRUE, /* silence non-portable warnings. */ |
| 12788 | ¤t)) |
| 12789 | FAIL2("panic: regclass returned NULL to handle_sets, flags=%#"UVxf"", |
| 12790 | (UV) *flagp); |
| 12791 | |
| 12792 | /* function call leaves parse pointing to the ']', except |
| 12793 | * if we faked it */ |
| 12794 | if (is_posix_class) { |
| 12795 | RExC_parse--; |
| 12796 | } |
| 12797 | |
| 12798 | SvREFCNT_dec(current); /* In case it returned something */ |
| 12799 | break; |
| 12800 | } |
| 12801 | |
| 12802 | case ']': |
| 12803 | if (depth--) break; |
| 12804 | RExC_parse++; |
| 12805 | if (RExC_parse < RExC_end |
| 12806 | && *RExC_parse == ')') |
| 12807 | { |
| 12808 | node = reganode(pRExC_state, ANYOF, 0); |
| 12809 | RExC_size += ANYOF_SKIP; |
| 12810 | nextchar(pRExC_state); |
| 12811 | Set_Node_Length(node, |
| 12812 | RExC_parse - oregcomp_parse + 1); /* MJD */ |
| 12813 | return node; |
| 12814 | } |
| 12815 | goto no_close; |
| 12816 | } |
| 12817 | RExC_parse++; |
| 12818 | } |
| 12819 | |
| 12820 | no_close: |
| 12821 | FAIL("Syntax error in (?[...])"); |
| 12822 | } |
| 12823 | |
| 12824 | /* Pass 2 only after this. Everything in this construct is a |
| 12825 | * metacharacter. Operands begin with either a '\' (for an escape |
| 12826 | * sequence), or a '[' for a bracketed character class. Any other |
| 12827 | * character should be an operator, or parenthesis for grouping. Both |
| 12828 | * types of operands are handled by calling regclass() to parse them. It |
| 12829 | * is called with a parameter to indicate to return the computed inversion |
| 12830 | * list. The parsing here is implemented via a stack. Each entry on the |
| 12831 | * stack is a single character representing one of the operators, or the |
| 12832 | * '('; or else a pointer to an operand inversion list. */ |
| 12833 | |
| 12834 | #define IS_OPERAND(a) (! SvIOK(a)) |
| 12835 | |
| 12836 | /* The stack starts empty. It is a syntax error if the first thing parsed |
| 12837 | * is a binary operator; everything else is pushed on the stack. When an |
| 12838 | * operand is parsed, the top of the stack is examined. If it is a binary |
| 12839 | * operator, the item before it should be an operand, and both are replaced |
| 12840 | * by the result of doing that operation on the new operand and the one on |
| 12841 | * the stack. Thus a sequence of binary operands is reduced to a single |
| 12842 | * one before the next one is parsed. |
| 12843 | * |
| 12844 | * A unary operator may immediately follow a binary in the input, for |
| 12845 | * example |
| 12846 | * [a] + ! [b] |
| 12847 | * When an operand is parsed and the top of the stack is a unary operator, |
| 12848 | * the operation is performed, and then the stack is rechecked to see if |
| 12849 | * this new operand is part of a binary operation; if so, it is handled as |
| 12850 | * above. |
| 12851 | * |
| 12852 | * A '(' is simply pushed on the stack; it is valid only if the stack is |
| 12853 | * empty, or the top element of the stack is an operator or another '(' |
| 12854 | * (for which the parenthesized expression will become an operand). By the |
| 12855 | * time the corresponding ')' is parsed everything in between should have |
| 12856 | * been parsed and evaluated to a single operand (or else is a syntax |
| 12857 | * error), and is handled as a regular operand */ |
| 12858 | |
| 12859 | sv_2mortal((SV *)(stack = newAV())); |
| 12860 | |
| 12861 | while (RExC_parse < RExC_end) { |
| 12862 | I32 top_index = av_tindex(stack); |
| 12863 | SV** top_ptr; |
| 12864 | SV* current = NULL; |
| 12865 | |
| 12866 | /* Skip white space */ |
| 12867 | RExC_parse = regpatws(pRExC_state, RExC_parse, |
| 12868 | TRUE /* means recognize comments */ ); |
| 12869 | if (RExC_parse >= RExC_end) { |
| 12870 | Perl_croak(aTHX_ "panic: Read past end of '(?[ ])'"); |
| 12871 | } |
| 12872 | if ((curchar = UCHARAT(RExC_parse)) == ']') { |
| 12873 | break; |
| 12874 | } |
| 12875 | |
| 12876 | switch (curchar) { |
| 12877 | |
| 12878 | case '?': |
| 12879 | if (av_tindex(stack) >= 0 /* This makes sure that we can |
| 12880 | safely subtract 1 from |
| 12881 | RExC_parse in the next clause. |
| 12882 | If we have something on the |
| 12883 | stack, we have parsed something |
| 12884 | */ |
| 12885 | && UCHARAT(RExC_parse - 1) == '(' |
| 12886 | && RExC_parse < RExC_end) |
| 12887 | { |
| 12888 | /* If is a '(?', could be an embedded '(?flags:(?[...])'. |
| 12889 | * This happens when we have some thing like |
| 12890 | * |
| 12891 | * my $thai_or_lao = qr/(?[ \p{Thai} + \p{Lao} ])/; |
| 12892 | * ... |
| 12893 | * qr/(?[ \p{Digit} & $thai_or_lao ])/; |
| 12894 | * |
| 12895 | * Here we would be handling the interpolated |
| 12896 | * '$thai_or_lao'. We handle this by a recursive call to |
| 12897 | * ourselves which returns the inversion list the |
| 12898 | * interpolated expression evaluates to. We use the flags |
| 12899 | * from the interpolated pattern. */ |
| 12900 | U32 save_flags = RExC_flags; |
| 12901 | const char * const save_parse = ++RExC_parse; |
| 12902 | |
| 12903 | parse_lparen_question_flags(pRExC_state); |
| 12904 | |
| 12905 | if (RExC_parse == save_parse /* Makes sure there was at |
| 12906 | least one flag (or this |
| 12907 | embedding wasn't compiled) |
| 12908 | */ |
| 12909 | || RExC_parse >= RExC_end - 4 |
| 12910 | || UCHARAT(RExC_parse) != ':' |
| 12911 | || UCHARAT(++RExC_parse) != '(' |
| 12912 | || UCHARAT(++RExC_parse) != '?' |
| 12913 | || UCHARAT(++RExC_parse) != '[') |
| 12914 | { |
| 12915 | |
| 12916 | /* In combination with the above, this moves the |
| 12917 | * pointer to the point just after the first erroneous |
| 12918 | * character (or if there are no flags, to where they |
| 12919 | * should have been) */ |
| 12920 | if (RExC_parse >= RExC_end - 4) { |
| 12921 | RExC_parse = RExC_end; |
| 12922 | } |
| 12923 | else if (RExC_parse != save_parse) { |
| 12924 | RExC_parse += (UTF) ? UTF8SKIP(RExC_parse) : 1; |
| 12925 | } |
| 12926 | vFAIL("Expecting '(?flags:(?[...'"); |
| 12927 | } |
| 12928 | RExC_parse++; |
| 12929 | (void) handle_regex_sets(pRExC_state, ¤t, flagp, |
| 12930 | depth+1, oregcomp_parse); |
| 12931 | |
| 12932 | /* Here, 'current' contains the embedded expression's |
| 12933 | * inversion list, and RExC_parse points to the trailing |
| 12934 | * ']'; the next character should be the ')' which will be |
| 12935 | * paired with the '(' that has been put on the stack, so |
| 12936 | * the whole embedded expression reduces to '(operand)' */ |
| 12937 | RExC_parse++; |
| 12938 | |
| 12939 | RExC_flags = save_flags; |
| 12940 | goto handle_operand; |
| 12941 | } |
| 12942 | /* FALLTHROUGH */ |
| 12943 | |
| 12944 | default: |
| 12945 | RExC_parse += (UTF) ? UTF8SKIP(RExC_parse) : 1; |
| 12946 | vFAIL("Unexpected character"); |
| 12947 | |
| 12948 | case '\\': |
| 12949 | /* regclass() can only return RESTART_UTF8 if multi-char |
| 12950 | folds are allowed. */ |
| 12951 | if (!regclass(pRExC_state, flagp,depth+1, |
| 12952 | TRUE, /* means parse just the next thing */ |
| 12953 | FALSE, /* don't allow multi-char folds */ |
| 12954 | FALSE, /* don't silence non-portable warnings. */ |
| 12955 | ¤t)) |
| 12956 | FAIL2("panic: regclass returned NULL to handle_sets, flags=%#"UVxf"", |
| 12957 | (UV) *flagp); |
| 12958 | /* regclass() will return with parsing just the \ sequence, |
| 12959 | * leaving the parse pointer at the next thing to parse */ |
| 12960 | RExC_parse--; |
| 12961 | goto handle_operand; |
| 12962 | |
| 12963 | case '[': /* Is a bracketed character class */ |
| 12964 | { |
| 12965 | bool is_posix_class = could_it_be_a_POSIX_class(pRExC_state); |
| 12966 | |
| 12967 | if (! is_posix_class) { |
| 12968 | RExC_parse++; |
| 12969 | } |
| 12970 | |
| 12971 | /* regclass() can only return RESTART_UTF8 if multi-char |
| 12972 | folds are allowed. */ |
| 12973 | if(!regclass(pRExC_state, flagp,depth+1, |
| 12974 | is_posix_class, /* parse the whole char class |
| 12975 | only if not a posix class */ |
| 12976 | FALSE, /* don't allow multi-char folds */ |
| 12977 | FALSE, /* don't silence non-portable warnings. */ |
| 12978 | ¤t)) |
| 12979 | FAIL2("panic: regclass returned NULL to handle_sets, flags=%#"UVxf"", |
| 12980 | (UV) *flagp); |
| 12981 | /* function call leaves parse pointing to the ']', except if we |
| 12982 | * faked it */ |
| 12983 | if (is_posix_class) { |
| 12984 | RExC_parse--; |
| 12985 | } |
| 12986 | |
| 12987 | goto handle_operand; |
| 12988 | } |
| 12989 | |
| 12990 | case '&': |
| 12991 | case '|': |
| 12992 | case '+': |
| 12993 | case '-': |
| 12994 | case '^': |
| 12995 | if (top_index < 0 |
| 12996 | || ( ! (top_ptr = av_fetch(stack, top_index, FALSE))) |
| 12997 | || ! IS_OPERAND(*top_ptr)) |
| 12998 | { |
| 12999 | RExC_parse++; |
| 13000 | vFAIL2("Unexpected binary operator '%c' with no preceding operand", curchar); |
| 13001 | } |
| 13002 | av_push(stack, newSVuv(curchar)); |
| 13003 | break; |
| 13004 | |
| 13005 | case '!': |
| 13006 | av_push(stack, newSVuv(curchar)); |
| 13007 | break; |
| 13008 | |
| 13009 | case '(': |
| 13010 | if (top_index >= 0) { |
| 13011 | top_ptr = av_fetch(stack, top_index, FALSE); |
| 13012 | assert(top_ptr); |
| 13013 | if (IS_OPERAND(*top_ptr)) { |
| 13014 | RExC_parse++; |
| 13015 | vFAIL("Unexpected '(' with no preceding operator"); |
| 13016 | } |
| 13017 | } |
| 13018 | av_push(stack, newSVuv(curchar)); |
| 13019 | break; |
| 13020 | |
| 13021 | case ')': |
| 13022 | { |
| 13023 | SV* lparen; |
| 13024 | if (top_index < 1 |
| 13025 | || ! (current = av_pop(stack)) |
| 13026 | || ! IS_OPERAND(current) |
| 13027 | || ! (lparen = av_pop(stack)) |
| 13028 | || IS_OPERAND(lparen) |
| 13029 | || SvUV(lparen) != '(') |
| 13030 | { |
| 13031 | SvREFCNT_dec(current); |
| 13032 | RExC_parse++; |
| 13033 | vFAIL("Unexpected ')'"); |
| 13034 | } |
| 13035 | top_index -= 2; |
| 13036 | SvREFCNT_dec_NN(lparen); |
| 13037 | |
| 13038 | /* FALLTHROUGH */ |
| 13039 | } |
| 13040 | |
| 13041 | handle_operand: |
| 13042 | |
| 13043 | /* Here, we have an operand to process, in 'current' */ |
| 13044 | |
| 13045 | if (top_index < 0) { /* Just push if stack is empty */ |
| 13046 | av_push(stack, current); |
| 13047 | } |
| 13048 | else { |
| 13049 | SV* top = av_pop(stack); |
| 13050 | SV *prev = NULL; |
| 13051 | char current_operator; |
| 13052 | |
| 13053 | if (IS_OPERAND(top)) { |
| 13054 | SvREFCNT_dec_NN(top); |
| 13055 | SvREFCNT_dec_NN(current); |
| 13056 | vFAIL("Operand with no preceding operator"); |
| 13057 | } |
| 13058 | current_operator = (char) SvUV(top); |
| 13059 | switch (current_operator) { |
| 13060 | case '(': /* Push the '(' back on followed by the new |
| 13061 | operand */ |
| 13062 | av_push(stack, top); |
| 13063 | av_push(stack, current); |
| 13064 | SvREFCNT_inc(top); /* Counters the '_dec' done |
| 13065 | just after the 'break', so |
| 13066 | it doesn't get wrongly freed |
| 13067 | */ |
| 13068 | break; |
| 13069 | |
| 13070 | case '!': |
| 13071 | _invlist_invert(current); |
| 13072 | |
| 13073 | /* Unlike binary operators, the top of the stack, |
| 13074 | * now that this unary one has been popped off, may |
| 13075 | * legally be an operator, and we now have operand |
| 13076 | * for it. */ |
| 13077 | top_index--; |
| 13078 | SvREFCNT_dec_NN(top); |
| 13079 | goto handle_operand; |
| 13080 | |
| 13081 | case '&': |
| 13082 | prev = av_pop(stack); |
| 13083 | _invlist_intersection(prev, |
| 13084 | current, |
| 13085 | ¤t); |
| 13086 | av_push(stack, current); |
| 13087 | break; |
| 13088 | |
| 13089 | case '|': |
| 13090 | case '+': |
| 13091 | prev = av_pop(stack); |
| 13092 | _invlist_union(prev, current, ¤t); |
| 13093 | av_push(stack, current); |
| 13094 | break; |
| 13095 | |
| 13096 | case '-': |
| 13097 | prev = av_pop(stack);; |
| 13098 | _invlist_subtract(prev, current, ¤t); |
| 13099 | av_push(stack, current); |
| 13100 | break; |
| 13101 | |
| 13102 | case '^': /* The union minus the intersection */ |
| 13103 | { |
| 13104 | SV* i = NULL; |
| 13105 | SV* u = NULL; |
| 13106 | SV* element; |
| 13107 | |
| 13108 | prev = av_pop(stack); |
| 13109 | _invlist_union(prev, current, &u); |
| 13110 | _invlist_intersection(prev, current, &i); |
| 13111 | /* _invlist_subtract will overwrite current |
| 13112 | without freeing what it already contains */ |
| 13113 | element = current; |
| 13114 | _invlist_subtract(u, i, ¤t); |
| 13115 | av_push(stack, current); |
| 13116 | SvREFCNT_dec_NN(i); |
| 13117 | SvREFCNT_dec_NN(u); |
| 13118 | SvREFCNT_dec_NN(element); |
| 13119 | break; |
| 13120 | } |
| 13121 | |
| 13122 | default: |
| 13123 | Perl_croak(aTHX_ "panic: Unexpected item on '(?[ ])' stack"); |
| 13124 | } |
| 13125 | SvREFCNT_dec_NN(top); |
| 13126 | SvREFCNT_dec(prev); |
| 13127 | } |
| 13128 | } |
| 13129 | |
| 13130 | RExC_parse += (UTF) ? UTF8SKIP(RExC_parse) : 1; |
| 13131 | } |
| 13132 | |
| 13133 | if (av_tindex(stack) < 0 /* Was empty */ |
| 13134 | || ((final = av_pop(stack)) == NULL) |
| 13135 | || ! IS_OPERAND(final) |
| 13136 | || av_tindex(stack) >= 0) /* More left on stack */ |
| 13137 | { |
| 13138 | vFAIL("Incomplete expression within '(?[ ])'"); |
| 13139 | } |
| 13140 | |
| 13141 | /* Here, 'final' is the resultant inversion list from evaluating the |
| 13142 | * expression. Return it if so requested */ |
| 13143 | if (return_invlist) { |
| 13144 | *return_invlist = final; |
| 13145 | return END; |
| 13146 | } |
| 13147 | |
| 13148 | /* Otherwise generate a resultant node, based on 'final'. regclass() is |
| 13149 | * expecting a string of ranges and individual code points */ |
| 13150 | invlist_iterinit(final); |
| 13151 | result_string = newSVpvs(""); |
| 13152 | while (invlist_iternext(final, &start, &end)) { |
| 13153 | if (start == end) { |
| 13154 | Perl_sv_catpvf(aTHX_ result_string, "\\x{%"UVXf"}", start); |
| 13155 | } |
| 13156 | else { |
| 13157 | Perl_sv_catpvf(aTHX_ result_string, "\\x{%"UVXf"}-\\x{%"UVXf"}", |
| 13158 | start, end); |
| 13159 | } |
| 13160 | } |
| 13161 | |
| 13162 | save_parse = RExC_parse; |
| 13163 | RExC_parse = SvPV(result_string, len); |
| 13164 | save_end = RExC_end; |
| 13165 | RExC_end = RExC_parse + len; |
| 13166 | |
| 13167 | /* We turn off folding around the call, as the class we have constructed |
| 13168 | * already has all folding taken into consideration, and we don't want |
| 13169 | * regclass() to add to that */ |
| 13170 | RExC_flags &= ~RXf_PMf_FOLD; |
| 13171 | /* regclass() can only return RESTART_UTF8 if multi-char folds are allowed. |
| 13172 | */ |
| 13173 | node = regclass(pRExC_state, flagp,depth+1, |
| 13174 | FALSE, /* means parse the whole char class */ |
| 13175 | FALSE, /* don't allow multi-char folds */ |
| 13176 | TRUE, /* silence non-portable warnings. The above may very |
| 13177 | well have generated non-portable code points, but |
| 13178 | they're valid on this machine */ |
| 13179 | NULL); |
| 13180 | if (!node) |
| 13181 | FAIL2("panic: regclass returned NULL to handle_sets, flags=%#"UVxf, |
| 13182 | PTR2UV(flagp)); |
| 13183 | if (save_fold) { |
| 13184 | RExC_flags |= RXf_PMf_FOLD; |
| 13185 | } |
| 13186 | RExC_parse = save_parse + 1; |
| 13187 | RExC_end = save_end; |
| 13188 | SvREFCNT_dec_NN(final); |
| 13189 | SvREFCNT_dec_NN(result_string); |
| 13190 | |
| 13191 | nextchar(pRExC_state); |
| 13192 | Set_Node_Length(node, RExC_parse - oregcomp_parse + 1); /* MJD */ |
| 13193 | return node; |
| 13194 | } |
| 13195 | #undef IS_OPERAND |
| 13196 | |
| 13197 | STATIC void |
| 13198 | S_add_above_Latin1_folds(pTHX_ RExC_state_t *pRExC_state, const U8 cp, SV** invlist) |
| 13199 | { |
| 13200 | /* This hard-codes the Latin1/above-Latin1 folding rules, so that an |
| 13201 | * innocent-looking character class, like /[ks]/i won't have to go out to |
| 13202 | * disk to find the possible matches. |
| 13203 | * |
| 13204 | * This should be called only for a Latin1-range code points, cp, which is |
| 13205 | * known to be involved in a simple fold with other code points above |
| 13206 | * Latin1. It would give false results if /aa has been specified. |
| 13207 | * Multi-char folds are outside the scope of this, and must be handled |
| 13208 | * specially. |
| 13209 | * |
| 13210 | * XXX It would be better to generate these via regen, in case a new |
| 13211 | * version of the Unicode standard adds new mappings, though that is not |
| 13212 | * really likely, and may be caught by the default: case of the switch |
| 13213 | * below. */ |
| 13214 | |
| 13215 | PERL_ARGS_ASSERT_ADD_ABOVE_LATIN1_FOLDS; |
| 13216 | |
| 13217 | assert(HAS_NONLATIN1_SIMPLE_FOLD_CLOSURE(cp)); |
| 13218 | |
| 13219 | switch (cp) { |
| 13220 | case 'k': |
| 13221 | case 'K': |
| 13222 | *invlist = |
| 13223 | add_cp_to_invlist(*invlist, KELVIN_SIGN); |
| 13224 | break; |
| 13225 | case 's': |
| 13226 | case 'S': |
| 13227 | *invlist = add_cp_to_invlist(*invlist, LATIN_SMALL_LETTER_LONG_S); |
| 13228 | break; |
| 13229 | case MICRO_SIGN: |
| 13230 | *invlist = add_cp_to_invlist(*invlist, GREEK_CAPITAL_LETTER_MU); |
| 13231 | *invlist = add_cp_to_invlist(*invlist, GREEK_SMALL_LETTER_MU); |
| 13232 | break; |
| 13233 | case LATIN_CAPITAL_LETTER_A_WITH_RING_ABOVE: |
| 13234 | case LATIN_SMALL_LETTER_A_WITH_RING_ABOVE: |
| 13235 | *invlist = add_cp_to_invlist(*invlist, ANGSTROM_SIGN); |
| 13236 | break; |
| 13237 | case LATIN_SMALL_LETTER_Y_WITH_DIAERESIS: |
| 13238 | *invlist = add_cp_to_invlist(*invlist, |
| 13239 | LATIN_CAPITAL_LETTER_Y_WITH_DIAERESIS); |
| 13240 | break; |
| 13241 | case LATIN_SMALL_LETTER_SHARP_S: |
| 13242 | *invlist = add_cp_to_invlist(*invlist, LATIN_CAPITAL_LETTER_SHARP_S); |
| 13243 | break; |
| 13244 | default: |
| 13245 | /* Use deprecated warning to increase the chances of this being |
| 13246 | * output */ |
| 13247 | ckWARN2reg_d(RExC_parse, "Perl folding rules are not up-to-date for 0x%02X; please use the perlbug utility to report;", cp); |
| 13248 | break; |
| 13249 | } |
| 13250 | } |
| 13251 | |
| 13252 | /* The names of properties whose definitions are not known at compile time are |
| 13253 | * stored in this SV, after a constant heading. So if the length has been |
| 13254 | * changed since initialization, then there is a run-time definition. */ |
| 13255 | #define HAS_NONLOCALE_RUNTIME_PROPERTY_DEFINITION \ |
| 13256 | (SvCUR(listsv) != initial_listsv_len) |
| 13257 | |
| 13258 | STATIC regnode * |
| 13259 | S_regclass(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth, |
| 13260 | const bool stop_at_1, /* Just parse the next thing, don't |
| 13261 | look for a full character class */ |
| 13262 | bool allow_multi_folds, |
| 13263 | const bool silence_non_portable, /* Don't output warnings |
| 13264 | about too large |
| 13265 | characters */ |
| 13266 | SV** ret_invlist) /* Return an inversion list, not a node */ |
| 13267 | { |
| 13268 | /* parse a bracketed class specification. Most of these will produce an |
| 13269 | * ANYOF node; but something like [a] will produce an EXACT node; [aA], an |
| 13270 | * EXACTFish node; [[:ascii:]], a POSIXA node; etc. It is more complex |
| 13271 | * under /i with multi-character folds: it will be rewritten following the |
| 13272 | * paradigm of this example, where the <multi-fold>s are characters which |
| 13273 | * fold to multiple character sequences: |
| 13274 | * /[abc\x{multi-fold1}def\x{multi-fold2}ghi]/i |
| 13275 | * gets effectively rewritten as: |
| 13276 | * /(?:\x{multi-fold1}|\x{multi-fold2}|[abcdefghi]/i |
| 13277 | * reg() gets called (recursively) on the rewritten version, and this |
| 13278 | * function will return what it constructs. (Actually the <multi-fold>s |
| 13279 | * aren't physically removed from the [abcdefghi], it's just that they are |
| 13280 | * ignored in the recursion by means of a flag: |
| 13281 | * <RExC_in_multi_char_class>.) |
| 13282 | * |
| 13283 | * ANYOF nodes contain a bit map for the first NUM_ANYOF_CODE_POINTS |
| 13284 | * characters, with the corresponding bit set if that character is in the |
| 13285 | * list. For characters above this, a range list or swash is used. There |
| 13286 | * are extra bits for \w, etc. in locale ANYOFs, as what these match is not |
| 13287 | * determinable at compile time |
| 13288 | * |
| 13289 | * Returns NULL, setting *flagp to RESTART_UTF8 if the sizing scan needs |
| 13290 | * to be restarted. This can only happen if ret_invlist is non-NULL. |
| 13291 | */ |
| 13292 | |
| 13293 | UV prevvalue = OOB_UNICODE, save_prevvalue = OOB_UNICODE; |
| 13294 | IV range = 0; |
| 13295 | UV value = OOB_UNICODE, save_value = OOB_UNICODE; |
| 13296 | regnode *ret; |
| 13297 | STRLEN numlen; |
| 13298 | IV namedclass = OOB_NAMEDCLASS; |
| 13299 | char *rangebegin = NULL; |
| 13300 | bool need_class = 0; |
| 13301 | SV *listsv = NULL; |
| 13302 | STRLEN initial_listsv_len = 0; /* Kind of a kludge to see if it is more |
| 13303 | than just initialized. */ |
| 13304 | SV* properties = NULL; /* Code points that match \p{} \P{} */ |
| 13305 | SV* posixes = NULL; /* Code points that match classes like [:word:], |
| 13306 | extended beyond the Latin1 range. These have to |
| 13307 | be kept separate from other code points for much |
| 13308 | of this function because their handling is |
| 13309 | different under /i, and for most classes under |
| 13310 | /d as well */ |
| 13311 | SV* nposixes = NULL; /* Similarly for [:^word:]. These are kept |
| 13312 | separate for a while from the non-complemented |
| 13313 | versions because of complications with /d |
| 13314 | matching */ |
| 13315 | UV element_count = 0; /* Number of distinct elements in the class. |
| 13316 | Optimizations may be possible if this is tiny */ |
| 13317 | AV * multi_char_matches = NULL; /* Code points that fold to more than one |
| 13318 | character; used under /i */ |
| 13319 | UV n; |
| 13320 | char * stop_ptr = RExC_end; /* where to stop parsing */ |
| 13321 | const bool skip_white = cBOOL(ret_invlist); /* ignore unescaped white |
| 13322 | space? */ |
| 13323 | const bool strict = cBOOL(ret_invlist); /* Apply strict parsing rules? */ |
| 13324 | |
| 13325 | /* Unicode properties are stored in a swash; this holds the current one |
| 13326 | * being parsed. If this swash is the only above-latin1 component of the |
| 13327 | * character class, an optimization is to pass it directly on to the |
| 13328 | * execution engine. Otherwise, it is set to NULL to indicate that there |
| 13329 | * are other things in the class that have to be dealt with at execution |
| 13330 | * time */ |
| 13331 | SV* swash = NULL; /* Code points that match \p{} \P{} */ |
| 13332 | |
| 13333 | /* Set if a component of this character class is user-defined; just passed |
| 13334 | * on to the engine */ |
| 13335 | bool has_user_defined_property = FALSE; |
| 13336 | |
| 13337 | /* inversion list of code points this node matches only when the target |
| 13338 | * string is in UTF-8. (Because is under /d) */ |
| 13339 | SV* depends_list = NULL; |
| 13340 | |
| 13341 | /* Inversion list of code points this node matches regardless of things |
| 13342 | * like locale, folding, utf8ness of the target string */ |
| 13343 | SV* cp_list = NULL; |
| 13344 | |
| 13345 | /* Like cp_list, but code points on this list need to be checked for things |
| 13346 | * that fold to/from them under /i */ |
| 13347 | SV* cp_foldable_list = NULL; |
| 13348 | |
| 13349 | /* Like cp_list, but code points on this list are valid only when the |
| 13350 | * runtime locale is UTF-8 */ |
| 13351 | SV* only_utf8_locale_list = NULL; |
| 13352 | |
| 13353 | #ifdef EBCDIC |
| 13354 | /* In a range, counts how many 0-2 of the ends of it came from literals, |
| 13355 | * not escapes. Thus we can tell if 'A' was input vs \x{C1} */ |
| 13356 | UV literal_endpoint = 0; |
| 13357 | #endif |
| 13358 | bool invert = FALSE; /* Is this class to be complemented */ |
| 13359 | |
| 13360 | bool warn_super = ALWAYS_WARN_SUPER; |
| 13361 | |
| 13362 | regnode * const orig_emit = RExC_emit; /* Save the original RExC_emit in |
| 13363 | case we need to change the emitted regop to an EXACT. */ |
| 13364 | const char * orig_parse = RExC_parse; |
| 13365 | const SSize_t orig_size = RExC_size; |
| 13366 | bool posixl_matches_all = FALSE; /* Does /l class have both e.g. \W,\w ? */ |
| 13367 | GET_RE_DEBUG_FLAGS_DECL; |
| 13368 | |
| 13369 | PERL_ARGS_ASSERT_REGCLASS; |
| 13370 | #ifndef DEBUGGING |
| 13371 | PERL_UNUSED_ARG(depth); |
| 13372 | #endif |
| 13373 | |
| 13374 | DEBUG_PARSE("clas"); |
| 13375 | |
| 13376 | /* Assume we are going to generate an ANYOF node. */ |
| 13377 | ret = reganode(pRExC_state, ANYOF, 0); |
| 13378 | |
| 13379 | if (SIZE_ONLY) { |
| 13380 | RExC_size += ANYOF_SKIP; |
| 13381 | listsv = &PL_sv_undef; /* For code scanners: listsv always non-NULL. */ |
| 13382 | } |
| 13383 | else { |
| 13384 | ANYOF_FLAGS(ret) = 0; |
| 13385 | |
| 13386 | RExC_emit += ANYOF_SKIP; |
| 13387 | listsv = newSVpvs_flags("# comment\n", SVs_TEMP); |
| 13388 | initial_listsv_len = SvCUR(listsv); |
| 13389 | SvTEMP_off(listsv); /* Grr, TEMPs and mortals are conflated. */ |
| 13390 | } |
| 13391 | |
| 13392 | if (skip_white) { |
| 13393 | RExC_parse = regpatws(pRExC_state, RExC_parse, |
| 13394 | FALSE /* means don't recognize comments */ ); |
| 13395 | } |
| 13396 | |
| 13397 | if (UCHARAT(RExC_parse) == '^') { /* Complement of range. */ |
| 13398 | RExC_parse++; |
| 13399 | invert = TRUE; |
| 13400 | allow_multi_folds = FALSE; |
| 13401 | RExC_naughty++; |
| 13402 | if (skip_white) { |
| 13403 | RExC_parse = regpatws(pRExC_state, RExC_parse, |
| 13404 | FALSE /* means don't recognize comments */ ); |
| 13405 | } |
| 13406 | } |
| 13407 | |
| 13408 | /* Check that they didn't say [:posix:] instead of [[:posix:]] */ |
| 13409 | if (!SIZE_ONLY && RExC_parse < RExC_end && POSIXCC(UCHARAT(RExC_parse))) { |
| 13410 | const char *s = RExC_parse; |
| 13411 | const char c = *s++; |
| 13412 | |
| 13413 | while (isWORDCHAR(*s)) |
| 13414 | s++; |
| 13415 | if (*s && c == *s && s[1] == ']') { |
| 13416 | SAVEFREESV(RExC_rx_sv); |
| 13417 | ckWARN3reg(s+2, |
| 13418 | "POSIX syntax [%c %c] belongs inside character classes", |
| 13419 | c, c); |
| 13420 | (void)ReREFCNT_inc(RExC_rx_sv); |
| 13421 | } |
| 13422 | } |
| 13423 | |
| 13424 | /* If the caller wants us to just parse a single element, accomplish this |
| 13425 | * by faking the loop ending condition */ |
| 13426 | if (stop_at_1 && RExC_end > RExC_parse) { |
| 13427 | stop_ptr = RExC_parse + 1; |
| 13428 | } |
| 13429 | |
| 13430 | /* allow 1st char to be ']' (allowing it to be '-' is dealt with later) */ |
| 13431 | if (UCHARAT(RExC_parse) == ']') |
| 13432 | goto charclassloop; |
| 13433 | |
| 13434 | parseit: |
| 13435 | while (1) { |
| 13436 | if (RExC_parse >= stop_ptr) { |
| 13437 | break; |
| 13438 | } |
| 13439 | |
| 13440 | if (skip_white) { |
| 13441 | RExC_parse = regpatws(pRExC_state, RExC_parse, |
| 13442 | FALSE /* means don't recognize comments */ ); |
| 13443 | } |
| 13444 | |
| 13445 | if (UCHARAT(RExC_parse) == ']') { |
| 13446 | break; |
| 13447 | } |
| 13448 | |
| 13449 | charclassloop: |
| 13450 | |
| 13451 | namedclass = OOB_NAMEDCLASS; /* initialize as illegal */ |
| 13452 | save_value = value; |
| 13453 | save_prevvalue = prevvalue; |
| 13454 | |
| 13455 | if (!range) { |
| 13456 | rangebegin = RExC_parse; |
| 13457 | element_count++; |
| 13458 | } |
| 13459 | if (UTF) { |
| 13460 | value = utf8n_to_uvchr((U8*)RExC_parse, |
| 13461 | RExC_end - RExC_parse, |
| 13462 | &numlen, UTF8_ALLOW_DEFAULT); |
| 13463 | RExC_parse += numlen; |
| 13464 | } |
| 13465 | else |
| 13466 | value = UCHARAT(RExC_parse++); |
| 13467 | |
| 13468 | if (value == '[' |
| 13469 | && RExC_parse < RExC_end |
| 13470 | && POSIXCC(UCHARAT(RExC_parse))) |
| 13471 | { |
| 13472 | namedclass = regpposixcc(pRExC_state, value, strict); |
| 13473 | } |
| 13474 | else if (value != '\\') { |
| 13475 | #ifdef EBCDIC |
| 13476 | literal_endpoint++; |
| 13477 | #endif |
| 13478 | } |
| 13479 | else { |
| 13480 | /* Is a backslash; get the code point of the char after it */ |
| 13481 | if (UTF && ! UTF8_IS_INVARIANT(RExC_parse)) { |
| 13482 | value = utf8n_to_uvchr((U8*)RExC_parse, |
| 13483 | RExC_end - RExC_parse, |
| 13484 | &numlen, UTF8_ALLOW_DEFAULT); |
| 13485 | RExC_parse += numlen; |
| 13486 | } |
| 13487 | else |
| 13488 | value = UCHARAT(RExC_parse++); |
| 13489 | |
| 13490 | /* Some compilers cannot handle switching on 64-bit integer |
| 13491 | * values, therefore value cannot be an UV. Yes, this will |
| 13492 | * be a problem later if we want switch on Unicode. |
| 13493 | * A similar issue a little bit later when switching on |
| 13494 | * namedclass. --jhi */ |
| 13495 | |
| 13496 | /* If the \ is escaping white space when white space is being |
| 13497 | * skipped, it means that that white space is wanted literally, and |
| 13498 | * is already in 'value'. Otherwise, need to translate the escape |
| 13499 | * into what it signifies. */ |
| 13500 | if (! skip_white || ! is_PATWS_cp(value)) switch ((I32)value) { |
| 13501 | |
| 13502 | case 'w': namedclass = ANYOF_WORDCHAR; break; |
| 13503 | case 'W': namedclass = ANYOF_NWORDCHAR; break; |
| 13504 | case 's': namedclass = ANYOF_SPACE; break; |
| 13505 | case 'S': namedclass = ANYOF_NSPACE; break; |
| 13506 | case 'd': namedclass = ANYOF_DIGIT; break; |
| 13507 | case 'D': namedclass = ANYOF_NDIGIT; break; |
| 13508 | case 'v': namedclass = ANYOF_VERTWS; break; |
| 13509 | case 'V': namedclass = ANYOF_NVERTWS; break; |
| 13510 | case 'h': namedclass = ANYOF_HORIZWS; break; |
| 13511 | case 'H': namedclass = ANYOF_NHORIZWS; break; |
| 13512 | case 'N': /* Handle \N{NAME} in class */ |
| 13513 | { |
| 13514 | /* We only pay attention to the first char of |
| 13515 | multichar strings being returned. I kinda wonder |
| 13516 | if this makes sense as it does change the behaviour |
| 13517 | from earlier versions, OTOH that behaviour was broken |
| 13518 | as well. */ |
| 13519 | if (! grok_bslash_N(pRExC_state, NULL, &value, flagp, depth, |
| 13520 | TRUE, /* => charclass */ |
| 13521 | strict)) |
| 13522 | { |
| 13523 | if (*flagp & RESTART_UTF8) |
| 13524 | FAIL("panic: grok_bslash_N set RESTART_UTF8"); |
| 13525 | goto parseit; |
| 13526 | } |
| 13527 | } |
| 13528 | break; |
| 13529 | case 'p': |
| 13530 | case 'P': |
| 13531 | { |
| 13532 | char *e; |
| 13533 | |
| 13534 | /* We will handle any undefined properties ourselves */ |
| 13535 | U8 swash_init_flags = _CORE_SWASH_INIT_RETURN_IF_UNDEF |
| 13536 | /* And we actually would prefer to get |
| 13537 | * the straight inversion list of the |
| 13538 | * swash, since we will be accessing it |
| 13539 | * anyway, to save a little time */ |
| 13540 | |_CORE_SWASH_INIT_ACCEPT_INVLIST; |
| 13541 | |
| 13542 | if (RExC_parse >= RExC_end) |
| 13543 | vFAIL2("Empty \\%c{}", (U8)value); |
| 13544 | if (*RExC_parse == '{') { |
| 13545 | const U8 c = (U8)value; |
| 13546 | e = strchr(RExC_parse++, '}'); |
| 13547 | if (!e) |
| 13548 | vFAIL2("Missing right brace on \\%c{}", c); |
| 13549 | while (isSPACE(*RExC_parse)) |
| 13550 | RExC_parse++; |
| 13551 | if (e == RExC_parse) |
| 13552 | vFAIL2("Empty \\%c{}", c); |
| 13553 | n = e - RExC_parse; |
| 13554 | while (isSPACE(*(RExC_parse + n - 1))) |
| 13555 | n--; |
| 13556 | } |
| 13557 | else { |
| 13558 | e = RExC_parse; |
| 13559 | n = 1; |
| 13560 | } |
| 13561 | if (!SIZE_ONLY) { |
| 13562 | SV* invlist; |
| 13563 | char* name; |
| 13564 | |
| 13565 | if (UCHARAT(RExC_parse) == '^') { |
| 13566 | RExC_parse++; |
| 13567 | n--; |
| 13568 | /* toggle. (The rhs xor gets the single bit that |
| 13569 | * differs between P and p; the other xor inverts just |
| 13570 | * that bit) */ |
| 13571 | value ^= 'P' ^ 'p'; |
| 13572 | |
| 13573 | while (isSPACE(*RExC_parse)) { |
| 13574 | RExC_parse++; |
| 13575 | n--; |
| 13576 | } |
| 13577 | } |
| 13578 | /* Try to get the definition of the property into |
| 13579 | * <invlist>. If /i is in effect, the effective property |
| 13580 | * will have its name be <__NAME_i>. The design is |
| 13581 | * discussed in commit |
| 13582 | * 2f833f5208e26b208886e51e09e2c072b5eabb46 */ |
| 13583 | name = savepv(Perl_form(aTHX_ |
| 13584 | "%s%.*s%s\n", |
| 13585 | (FOLD) ? "__" : "", |
| 13586 | (int)n, |
| 13587 | RExC_parse, |
| 13588 | (FOLD) ? "_i" : "" |
| 13589 | )); |
| 13590 | |
| 13591 | /* Look up the property name, and get its swash and |
| 13592 | * inversion list, if the property is found */ |
| 13593 | if (swash) { |
| 13594 | SvREFCNT_dec_NN(swash); |
| 13595 | } |
| 13596 | swash = _core_swash_init("utf8", name, &PL_sv_undef, |
| 13597 | 1, /* binary */ |
| 13598 | 0, /* not tr/// */ |
| 13599 | NULL, /* No inversion list */ |
| 13600 | &swash_init_flags |
| 13601 | ); |
| 13602 | if (! swash || ! (invlist = _get_swash_invlist(swash))) { |
| 13603 | HV* curpkg = (IN_PERL_COMPILETIME) |
| 13604 | ? PL_curstash |
| 13605 | : CopSTASH(PL_curcop); |
| 13606 | if (swash) { |
| 13607 | SvREFCNT_dec_NN(swash); |
| 13608 | swash = NULL; |
| 13609 | } |
| 13610 | |
| 13611 | /* Here didn't find it. It could be a user-defined |
| 13612 | * property that will be available at run-time. If we |
| 13613 | * accept only compile-time properties, is an error; |
| 13614 | * otherwise add it to the list for run-time look up */ |
| 13615 | if (ret_invlist) { |
| 13616 | RExC_parse = e + 1; |
| 13617 | vFAIL2utf8f( |
| 13618 | "Property '%"UTF8f"' is unknown", |
| 13619 | UTF8fARG(UTF, n, name)); |
| 13620 | } |
| 13621 | |
| 13622 | /* If the property name doesn't already have a package |
| 13623 | * name, add the current one to it so that it can be |
| 13624 | * referred to outside it. [perl #121777] */ |
| 13625 | if (curpkg && ! instr(name, "::")) { |
| 13626 | char* pkgname = HvNAME(curpkg); |
| 13627 | if (strNE(pkgname, "main")) { |
| 13628 | char* full_name = Perl_form(aTHX_ |
| 13629 | "%s::%s", |
| 13630 | pkgname, |
| 13631 | name); |
| 13632 | n = strlen(full_name); |
| 13633 | Safefree(name); |
| 13634 | name = savepvn(full_name, n); |
| 13635 | } |
| 13636 | } |
| 13637 | Perl_sv_catpvf(aTHX_ listsv, "%cutf8::%"UTF8f"\n", |
| 13638 | (value == 'p' ? '+' : '!'), |
| 13639 | UTF8fARG(UTF, n, name)); |
| 13640 | has_user_defined_property = TRUE; |
| 13641 | |
| 13642 | /* We don't know yet, so have to assume that the |
| 13643 | * property could match something in the Latin1 range, |
| 13644 | * hence something that isn't utf8. Note that this |
| 13645 | * would cause things in <depends_list> to match |
| 13646 | * inappropriately, except that any \p{}, including |
| 13647 | * this one forces Unicode semantics, which means there |
| 13648 | * is no <depends_list> */ |
| 13649 | ANYOF_FLAGS(ret) |= ANYOF_NONBITMAP_NON_UTF8; |
| 13650 | } |
| 13651 | else { |
| 13652 | |
| 13653 | /* Here, did get the swash and its inversion list. If |
| 13654 | * the swash is from a user-defined property, then this |
| 13655 | * whole character class should be regarded as such */ |
| 13656 | if (swash_init_flags |
| 13657 | & _CORE_SWASH_INIT_USER_DEFINED_PROPERTY) |
| 13658 | { |
| 13659 | has_user_defined_property = TRUE; |
| 13660 | } |
| 13661 | else if |
| 13662 | /* We warn on matching an above-Unicode code point |
| 13663 | * if the match would return true, except don't |
| 13664 | * warn for \p{All}, which has exactly one element |
| 13665 | * = 0 */ |
| 13666 | (_invlist_contains_cp(invlist, 0x110000) |
| 13667 | && (! (_invlist_len(invlist) == 1 |
| 13668 | && *invlist_array(invlist) == 0))) |
| 13669 | { |
| 13670 | warn_super = TRUE; |
| 13671 | } |
| 13672 | |
| 13673 | |
| 13674 | /* Invert if asking for the complement */ |
| 13675 | if (value == 'P') { |
| 13676 | _invlist_union_complement_2nd(properties, |
| 13677 | invlist, |
| 13678 | &properties); |
| 13679 | |
| 13680 | /* The swash can't be used as-is, because we've |
| 13681 | * inverted things; delay removing it to here after |
| 13682 | * have copied its invlist above */ |
| 13683 | SvREFCNT_dec_NN(swash); |
| 13684 | swash = NULL; |
| 13685 | } |
| 13686 | else { |
| 13687 | _invlist_union(properties, invlist, &properties); |
| 13688 | } |
| 13689 | } |
| 13690 | Safefree(name); |
| 13691 | } |
| 13692 | RExC_parse = e + 1; |
| 13693 | namedclass = ANYOF_UNIPROP; /* no official name, but it's |
| 13694 | named */ |
| 13695 | |
| 13696 | /* \p means they want Unicode semantics */ |
| 13697 | RExC_uni_semantics = 1; |
| 13698 | } |
| 13699 | break; |
| 13700 | case 'n': value = '\n'; break; |
| 13701 | case 'r': value = '\r'; break; |
| 13702 | case 't': value = '\t'; break; |
| 13703 | case 'f': value = '\f'; break; |
| 13704 | case 'b': value = '\b'; break; |
| 13705 | case 'e': value = ESC_NATIVE; break; |
| 13706 | case 'a': value = '\a'; break; |
| 13707 | case 'o': |
| 13708 | RExC_parse--; /* function expects to be pointed at the 'o' */ |
| 13709 | { |
| 13710 | const char* error_msg; |
| 13711 | bool valid = grok_bslash_o(&RExC_parse, |
| 13712 | &value, |
| 13713 | &error_msg, |
| 13714 | SIZE_ONLY, /* warnings in pass |
| 13715 | 1 only */ |
| 13716 | strict, |
| 13717 | silence_non_portable, |
| 13718 | UTF); |
| 13719 | if (! valid) { |
| 13720 | vFAIL(error_msg); |
| 13721 | } |
| 13722 | } |
| 13723 | if (PL_encoding && value < 0x100) { |
| 13724 | goto recode_encoding; |
| 13725 | } |
| 13726 | break; |
| 13727 | case 'x': |
| 13728 | RExC_parse--; /* function expects to be pointed at the 'x' */ |
| 13729 | { |
| 13730 | const char* error_msg; |
| 13731 | bool valid = grok_bslash_x(&RExC_parse, |
| 13732 | &value, |
| 13733 | &error_msg, |
| 13734 | TRUE, /* Output warnings */ |
| 13735 | strict, |
| 13736 | silence_non_portable, |
| 13737 | UTF); |
| 13738 | if (! valid) { |
| 13739 | vFAIL(error_msg); |
| 13740 | } |
| 13741 | } |
| 13742 | if (PL_encoding && value < 0x100) |
| 13743 | goto recode_encoding; |
| 13744 | break; |
| 13745 | case 'c': |
| 13746 | value = grok_bslash_c(*RExC_parse++, SIZE_ONLY); |
| 13747 | break; |
| 13748 | case '0': case '1': case '2': case '3': case '4': |
| 13749 | case '5': case '6': case '7': |
| 13750 | { |
| 13751 | /* Take 1-3 octal digits */ |
| 13752 | I32 flags = PERL_SCAN_SILENT_ILLDIGIT; |
| 13753 | numlen = (strict) ? 4 : 3; |
| 13754 | value = grok_oct(--RExC_parse, &numlen, &flags, NULL); |
| 13755 | RExC_parse += numlen; |
| 13756 | if (numlen != 3) { |
| 13757 | if (strict) { |
| 13758 | RExC_parse += (UTF) ? UTF8SKIP(RExC_parse) : 1; |
| 13759 | vFAIL("Need exactly 3 octal digits"); |
| 13760 | } |
| 13761 | else if (! SIZE_ONLY /* like \08, \178 */ |
| 13762 | && numlen < 3 |
| 13763 | && RExC_parse < RExC_end |
| 13764 | && isDIGIT(*RExC_parse) |
| 13765 | && ckWARN(WARN_REGEXP)) |
| 13766 | { |
| 13767 | SAVEFREESV(RExC_rx_sv); |
| 13768 | reg_warn_non_literal_string( |
| 13769 | RExC_parse + 1, |
| 13770 | form_short_octal_warning(RExC_parse, numlen)); |
| 13771 | (void)ReREFCNT_inc(RExC_rx_sv); |
| 13772 | } |
| 13773 | } |
| 13774 | if (PL_encoding && value < 0x100) |
| 13775 | goto recode_encoding; |
| 13776 | break; |
| 13777 | } |
| 13778 | recode_encoding: |
| 13779 | if (! RExC_override_recoding) { |
| 13780 | SV* enc = PL_encoding; |
| 13781 | value = reg_recode((const char)(U8)value, &enc); |
| 13782 | if (!enc) { |
| 13783 | if (strict) { |
| 13784 | vFAIL("Invalid escape in the specified encoding"); |
| 13785 | } |
| 13786 | else if (SIZE_ONLY) { |
| 13787 | ckWARNreg(RExC_parse, |
| 13788 | "Invalid escape in the specified encoding"); |
| 13789 | } |
| 13790 | } |
| 13791 | break; |
| 13792 | } |
| 13793 | default: |
| 13794 | /* Allow \_ to not give an error */ |
| 13795 | if (!SIZE_ONLY && isWORDCHAR(value) && value != '_') { |
| 13796 | if (strict) { |
| 13797 | vFAIL2("Unrecognized escape \\%c in character class", |
| 13798 | (int)value); |
| 13799 | } |
| 13800 | else { |
| 13801 | SAVEFREESV(RExC_rx_sv); |
| 13802 | ckWARN2reg(RExC_parse, |
| 13803 | "Unrecognized escape \\%c in character class passed through", |
| 13804 | (int)value); |
| 13805 | (void)ReREFCNT_inc(RExC_rx_sv); |
| 13806 | } |
| 13807 | } |
| 13808 | break; |
| 13809 | } /* End of switch on char following backslash */ |
| 13810 | } /* end of handling backslash escape sequences */ |
| 13811 | |
| 13812 | /* Here, we have the current token in 'value' */ |
| 13813 | |
| 13814 | if (namedclass > OOB_NAMEDCLASS) { /* this is a named class \blah */ |
| 13815 | U8 classnum; |
| 13816 | |
| 13817 | /* a bad range like a-\d, a-[:digit:]. The '-' is taken as a |
| 13818 | * literal, as is the character that began the false range, i.e. |
| 13819 | * the 'a' in the examples */ |
| 13820 | if (range) { |
| 13821 | if (!SIZE_ONLY) { |
| 13822 | const int w = (RExC_parse >= rangebegin) |
| 13823 | ? RExC_parse - rangebegin |
| 13824 | : 0; |
| 13825 | if (strict) { |
| 13826 | vFAIL2utf8f( |
| 13827 | "False [] range \"%"UTF8f"\"", |
| 13828 | UTF8fARG(UTF, w, rangebegin)); |
| 13829 | } |
| 13830 | else { |
| 13831 | SAVEFREESV(RExC_rx_sv); /* in case of fatal warnings */ |
| 13832 | ckWARN2reg(RExC_parse, |
| 13833 | "False [] range \"%"UTF8f"\"", |
| 13834 | UTF8fARG(UTF, w, rangebegin)); |
| 13835 | (void)ReREFCNT_inc(RExC_rx_sv); |
| 13836 | cp_list = add_cp_to_invlist(cp_list, '-'); |
| 13837 | cp_foldable_list = add_cp_to_invlist(cp_foldable_list, |
| 13838 | prevvalue); |
| 13839 | } |
| 13840 | } |
| 13841 | |
| 13842 | range = 0; /* this was not a true range */ |
| 13843 | element_count += 2; /* So counts for three values */ |
| 13844 | } |
| 13845 | |
| 13846 | classnum = namedclass_to_classnum(namedclass); |
| 13847 | |
| 13848 | if (LOC && namedclass < ANYOF_POSIXL_MAX |
| 13849 | #ifndef HAS_ISASCII |
| 13850 | && classnum != _CC_ASCII |
| 13851 | #endif |
| 13852 | ) { |
| 13853 | /* What the Posix classes (like \w, [:space:]) match in locale |
| 13854 | * isn't knowable under locale until actual match time. Room |
| 13855 | * must be reserved (one time per outer bracketed class) to |
| 13856 | * store such classes. The space will contain a bit for each |
| 13857 | * named class that is to be matched against. This isn't |
| 13858 | * needed for \p{} and pseudo-classes, as they are not affected |
| 13859 | * by locale, and hence are dealt with separately */ |
| 13860 | if (! need_class) { |
| 13861 | need_class = 1; |
| 13862 | if (SIZE_ONLY) { |
| 13863 | RExC_size += ANYOF_POSIXL_SKIP - ANYOF_SKIP; |
| 13864 | } |
| 13865 | else { |
| 13866 | RExC_emit += ANYOF_POSIXL_SKIP - ANYOF_SKIP; |
| 13867 | } |
| 13868 | ANYOF_FLAGS(ret) |= ANYOF_POSIXL; |
| 13869 | ANYOF_POSIXL_ZERO(ret); |
| 13870 | } |
| 13871 | |
| 13872 | /* Coverity thinks it is possible for this to be negative; both |
| 13873 | * jhi and khw think it's not, but be safer */ |
| 13874 | assert(! (ANYOF_FLAGS(ret) & ANYOF_POSIXL) |
| 13875 | || (namedclass + ((namedclass % 2) ? -1 : 1)) >= 0); |
| 13876 | |
| 13877 | /* See if it already matches the complement of this POSIX |
| 13878 | * class */ |
| 13879 | if ((ANYOF_FLAGS(ret) & ANYOF_POSIXL) |
| 13880 | && ANYOF_POSIXL_TEST(ret, namedclass + ((namedclass % 2) |
| 13881 | ? -1 |
| 13882 | : 1))) |
| 13883 | { |
| 13884 | posixl_matches_all = TRUE; |
| 13885 | break; /* No need to continue. Since it matches both |
| 13886 | e.g., \w and \W, it matches everything, and the |
| 13887 | bracketed class can be optimized into qr/./s */ |
| 13888 | } |
| 13889 | |
| 13890 | /* Add this class to those that should be checked at runtime */ |
| 13891 | ANYOF_POSIXL_SET(ret, namedclass); |
| 13892 | |
| 13893 | /* The above-Latin1 characters are not subject to locale rules. |
| 13894 | * Just add them, in the second pass, to the |
| 13895 | * unconditionally-matched list */ |
| 13896 | if (! SIZE_ONLY) { |
| 13897 | SV* scratch_list = NULL; |
| 13898 | |
| 13899 | /* Get the list of the above-Latin1 code points this |
| 13900 | * matches */ |
| 13901 | _invlist_intersection_maybe_complement_2nd(PL_AboveLatin1, |
| 13902 | PL_XPosix_ptrs[classnum], |
| 13903 | |
| 13904 | /* Odd numbers are complements, like |
| 13905 | * NDIGIT, NASCII, ... */ |
| 13906 | namedclass % 2 != 0, |
| 13907 | &scratch_list); |
| 13908 | /* Checking if 'cp_list' is NULL first saves an extra |
| 13909 | * clone. Its reference count will be decremented at the |
| 13910 | * next union, etc, or if this is the only instance, at the |
| 13911 | * end of the routine */ |
| 13912 | if (! cp_list) { |
| 13913 | cp_list = scratch_list; |
| 13914 | } |
| 13915 | else { |
| 13916 | _invlist_union(cp_list, scratch_list, &cp_list); |
| 13917 | SvREFCNT_dec_NN(scratch_list); |
| 13918 | } |
| 13919 | continue; /* Go get next character */ |
| 13920 | } |
| 13921 | } |
| 13922 | else if (! SIZE_ONLY) { |
| 13923 | |
| 13924 | /* Here, not in pass1 (in that pass we skip calculating the |
| 13925 | * contents of this class), and is /l, or is a POSIX class for |
| 13926 | * which /l doesn't matter (or is a Unicode property, which is |
| 13927 | * skipped here). */ |
| 13928 | if (namedclass >= ANYOF_POSIXL_MAX) { /* If a special class */ |
| 13929 | if (namedclass != ANYOF_UNIPROP) { /* UNIPROP = \p and \P */ |
| 13930 | |
| 13931 | /* Here, should be \h, \H, \v, or \V. None of /d, /i |
| 13932 | * nor /l make a difference in what these match, |
| 13933 | * therefore we just add what they match to cp_list. */ |
| 13934 | if (classnum != _CC_VERTSPACE) { |
| 13935 | assert( namedclass == ANYOF_HORIZWS |
| 13936 | || namedclass == ANYOF_NHORIZWS); |
| 13937 | |
| 13938 | /* It turns out that \h is just a synonym for |
| 13939 | * XPosixBlank */ |
| 13940 | classnum = _CC_BLANK; |
| 13941 | } |
| 13942 | |
| 13943 | _invlist_union_maybe_complement_2nd( |
| 13944 | cp_list, |
| 13945 | PL_XPosix_ptrs[classnum], |
| 13946 | namedclass % 2 != 0, /* Complement if odd |
| 13947 | (NHORIZWS, NVERTWS) |
| 13948 | */ |
| 13949 | &cp_list); |
| 13950 | } |
| 13951 | } |
| 13952 | else { /* Garden variety class. If is NASCII, NDIGIT, ... |
| 13953 | complement and use nposixes */ |
| 13954 | SV** posixes_ptr = namedclass % 2 == 0 |
| 13955 | ? &posixes |
| 13956 | : &nposixes; |
| 13957 | SV** source_ptr = &PL_XPosix_ptrs[classnum]; |
| 13958 | _invlist_union_maybe_complement_2nd( |
| 13959 | *posixes_ptr, |
| 13960 | *source_ptr, |
| 13961 | namedclass % 2 != 0, |
| 13962 | posixes_ptr); |
| 13963 | } |
| 13964 | continue; /* Go get next character */ |
| 13965 | } |
| 13966 | } /* end of namedclass \blah */ |
| 13967 | |
| 13968 | /* Here, we have a single value. If 'range' is set, it is the ending |
| 13969 | * of a range--check its validity. Later, we will handle each |
| 13970 | * individual code point in the range. If 'range' isn't set, this |
| 13971 | * could be the beginning of a range, so check for that by looking |
| 13972 | * ahead to see if the next real character to be processed is the range |
| 13973 | * indicator--the minus sign */ |
| 13974 | |
| 13975 | if (skip_white) { |
| 13976 | RExC_parse = regpatws(pRExC_state, RExC_parse, |
| 13977 | FALSE /* means don't recognize comments */ ); |
| 13978 | } |
| 13979 | |
| 13980 | if (range) { |
| 13981 | if (prevvalue > value) /* b-a */ { |
| 13982 | const int w = RExC_parse - rangebegin; |
| 13983 | vFAIL2utf8f( |
| 13984 | "Invalid [] range \"%"UTF8f"\"", |
| 13985 | UTF8fARG(UTF, w, rangebegin)); |
| 13986 | range = 0; /* not a valid range */ |
| 13987 | } |
| 13988 | } |
| 13989 | else { |
| 13990 | prevvalue = value; /* save the beginning of the potential range */ |
| 13991 | if (! stop_at_1 /* Can't be a range if parsing just one thing */ |
| 13992 | && *RExC_parse == '-') |
| 13993 | { |
| 13994 | char* next_char_ptr = RExC_parse + 1; |
| 13995 | if (skip_white) { /* Get the next real char after the '-' */ |
| 13996 | next_char_ptr = regpatws(pRExC_state, |
| 13997 | RExC_parse + 1, |
| 13998 | FALSE); /* means don't recognize |
| 13999 | comments */ |
| 14000 | } |
| 14001 | |
| 14002 | /* If the '-' is at the end of the class (just before the ']', |
| 14003 | * it is a literal minus; otherwise it is a range */ |
| 14004 | if (next_char_ptr < RExC_end && *next_char_ptr != ']') { |
| 14005 | RExC_parse = next_char_ptr; |
| 14006 | |
| 14007 | /* a bad range like \w-, [:word:]- ? */ |
| 14008 | if (namedclass > OOB_NAMEDCLASS) { |
| 14009 | if (strict || ckWARN(WARN_REGEXP)) { |
| 14010 | const int w = |
| 14011 | RExC_parse >= rangebegin ? |
| 14012 | RExC_parse - rangebegin : 0; |
| 14013 | if (strict) { |
| 14014 | vFAIL4("False [] range \"%*.*s\"", |
| 14015 | w, w, rangebegin); |
| 14016 | } |
| 14017 | else { |
| 14018 | vWARN4(RExC_parse, |
| 14019 | "False [] range \"%*.*s\"", |
| 14020 | w, w, rangebegin); |
| 14021 | } |
| 14022 | } |
| 14023 | if (!SIZE_ONLY) { |
| 14024 | cp_list = add_cp_to_invlist(cp_list, '-'); |
| 14025 | } |
| 14026 | element_count++; |
| 14027 | } else |
| 14028 | range = 1; /* yeah, it's a range! */ |
| 14029 | continue; /* but do it the next time */ |
| 14030 | } |
| 14031 | } |
| 14032 | } |
| 14033 | |
| 14034 | /* Here, <prevvalue> is the beginning of the range, if any; or <value> |
| 14035 | * if not */ |
| 14036 | |
| 14037 | /* non-Latin1 code point implies unicode semantics. Must be set in |
| 14038 | * pass1 so is there for the whole of pass 2 */ |
| 14039 | if (value > 255) { |
| 14040 | RExC_uni_semantics = 1; |
| 14041 | } |
| 14042 | |
| 14043 | /* Ready to process either the single value, or the completed range. |
| 14044 | * For single-valued non-inverted ranges, we consider the possibility |
| 14045 | * of multi-char folds. (We made a conscious decision to not do this |
| 14046 | * for the other cases because it can often lead to non-intuitive |
| 14047 | * results. For example, you have the peculiar case that: |
| 14048 | * "s s" =~ /^[^\xDF]+$/i => Y |
| 14049 | * "ss" =~ /^[^\xDF]+$/i => N |
| 14050 | * |
| 14051 | * See [perl #89750] */ |
| 14052 | if (FOLD && allow_multi_folds && value == prevvalue) { |
| 14053 | if (value == LATIN_SMALL_LETTER_SHARP_S |
| 14054 | || (value > 255 && _invlist_contains_cp(PL_HasMultiCharFold, |
| 14055 | value))) |
| 14056 | { |
| 14057 | /* Here <value> is indeed a multi-char fold. Get what it is */ |
| 14058 | |
| 14059 | U8 foldbuf[UTF8_MAXBYTES_CASE]; |
| 14060 | STRLEN foldlen; |
| 14061 | |
| 14062 | UV folded = _to_uni_fold_flags( |
| 14063 | value, |
| 14064 | foldbuf, |
| 14065 | &foldlen, |
| 14066 | FOLD_FLAGS_FULL | (ASCII_FOLD_RESTRICTED |
| 14067 | ? FOLD_FLAGS_NOMIX_ASCII |
| 14068 | : 0) |
| 14069 | ); |
| 14070 | |
| 14071 | /* Here, <folded> should be the first character of the |
| 14072 | * multi-char fold of <value>, with <foldbuf> containing the |
| 14073 | * whole thing. But, if this fold is not allowed (because of |
| 14074 | * the flags), <fold> will be the same as <value>, and should |
| 14075 | * be processed like any other character, so skip the special |
| 14076 | * handling */ |
| 14077 | if (folded != value) { |
| 14078 | |
| 14079 | /* Skip if we are recursed, currently parsing the class |
| 14080 | * again. Otherwise add this character to the list of |
| 14081 | * multi-char folds. */ |
| 14082 | if (! RExC_in_multi_char_class) { |
| 14083 | AV** this_array_ptr; |
| 14084 | AV* this_array; |
| 14085 | STRLEN cp_count = utf8_length(foldbuf, |
| 14086 | foldbuf + foldlen); |
| 14087 | SV* multi_fold = sv_2mortal(newSVpvs("")); |
| 14088 | |
| 14089 | Perl_sv_catpvf(aTHX_ multi_fold, "\\x{%"UVXf"}", value); |
| 14090 | |
| 14091 | |
| 14092 | if (! multi_char_matches) { |
| 14093 | multi_char_matches = newAV(); |
| 14094 | } |
| 14095 | |
| 14096 | /* <multi_char_matches> is actually an array of arrays. |
| 14097 | * There will be one or two top-level elements: [2], |
| 14098 | * and/or [3]. The [2] element is an array, each |
| 14099 | * element thereof is a character which folds to TWO |
| 14100 | * characters; [3] is for folds to THREE characters. |
| 14101 | * (Unicode guarantees a maximum of 3 characters in any |
| 14102 | * fold.) When we rewrite the character class below, |
| 14103 | * we will do so such that the longest folds are |
| 14104 | * written first, so that it prefers the longest |
| 14105 | * matching strings first. This is done even if it |
| 14106 | * turns out that any quantifier is non-greedy, out of |
| 14107 | * programmer laziness. Tom Christiansen has agreed |
| 14108 | * that this is ok. This makes the test for the |
| 14109 | * ligature 'ffi' come before the test for 'ff' */ |
| 14110 | if (av_exists(multi_char_matches, cp_count)) { |
| 14111 | this_array_ptr = (AV**) av_fetch(multi_char_matches, |
| 14112 | cp_count, FALSE); |
| 14113 | this_array = *this_array_ptr; |
| 14114 | } |
| 14115 | else { |
| 14116 | this_array = newAV(); |
| 14117 | av_store(multi_char_matches, cp_count, |
| 14118 | (SV*) this_array); |
| 14119 | } |
| 14120 | av_push(this_array, multi_fold); |
| 14121 | } |
| 14122 | |
| 14123 | /* This element should not be processed further in this |
| 14124 | * class */ |
| 14125 | element_count--; |
| 14126 | value = save_value; |
| 14127 | prevvalue = save_prevvalue; |
| 14128 | continue; |
| 14129 | } |
| 14130 | } |
| 14131 | } |
| 14132 | |
| 14133 | /* Deal with this element of the class */ |
| 14134 | if (! SIZE_ONLY) { |
| 14135 | #ifndef EBCDIC |
| 14136 | cp_foldable_list = _add_range_to_invlist(cp_foldable_list, |
| 14137 | prevvalue, value); |
| 14138 | #else |
| 14139 | SV* this_range = _new_invlist(1); |
| 14140 | _append_range_to_invlist(this_range, prevvalue, value); |
| 14141 | |
| 14142 | /* In EBCDIC, the ranges 'A-Z' and 'a-z' are each not contiguous. |
| 14143 | * If this range was specified using something like 'i-j', we want |
| 14144 | * to include only the 'i' and the 'j', and not anything in |
| 14145 | * between, so exclude non-ASCII, non-alphabetics from it. |
| 14146 | * However, if the range was specified with something like |
| 14147 | * [\x89-\x91] or [\x89-j], all code points within it should be |
| 14148 | * included. literal_endpoint==2 means both ends of the range used |
| 14149 | * a literal character, not \x{foo} */ |
| 14150 | if (literal_endpoint == 2 |
| 14151 | && ((prevvalue >= 'a' && value <= 'z') |
| 14152 | || (prevvalue >= 'A' && value <= 'Z'))) |
| 14153 | { |
| 14154 | _invlist_intersection(this_range, PL_XPosix_ptrs[_CC_ASCII], |
| 14155 | &this_range); |
| 14156 | |
| 14157 | /* Since this above only contains ascii, the intersection of it |
| 14158 | * with anything will still yield only ascii */ |
| 14159 | _invlist_intersection(this_range, PL_XPosix_ptrs[_CC_ALPHA], |
| 14160 | &this_range); |
| 14161 | } |
| 14162 | _invlist_union(cp_foldable_list, this_range, &cp_foldable_list); |
| 14163 | literal_endpoint = 0; |
| 14164 | #endif |
| 14165 | } |
| 14166 | |
| 14167 | range = 0; /* this range (if it was one) is done now */ |
| 14168 | } /* End of loop through all the text within the brackets */ |
| 14169 | |
| 14170 | /* If anything in the class expands to more than one character, we have to |
| 14171 | * deal with them by building up a substitute parse string, and recursively |
| 14172 | * calling reg() on it, instead of proceeding */ |
| 14173 | if (multi_char_matches) { |
| 14174 | SV * substitute_parse = newSVpvn_flags("?:", 2, SVs_TEMP); |
| 14175 | I32 cp_count; |
| 14176 | STRLEN len; |
| 14177 | char *save_end = RExC_end; |
| 14178 | char *save_parse = RExC_parse; |
| 14179 | bool first_time = TRUE; /* First multi-char occurrence doesn't get |
| 14180 | a "|" */ |
| 14181 | I32 reg_flags; |
| 14182 | |
| 14183 | assert(! invert); |
| 14184 | #if 0 /* Have decided not to deal with multi-char folds in inverted classes, |
| 14185 | because too confusing */ |
| 14186 | if (invert) { |
| 14187 | sv_catpv(substitute_parse, "(?:"); |
| 14188 | } |
| 14189 | #endif |
| 14190 | |
| 14191 | /* Look at the longest folds first */ |
| 14192 | for (cp_count = av_tindex(multi_char_matches); cp_count > 0; cp_count--) { |
| 14193 | |
| 14194 | if (av_exists(multi_char_matches, cp_count)) { |
| 14195 | AV** this_array_ptr; |
| 14196 | SV* this_sequence; |
| 14197 | |
| 14198 | this_array_ptr = (AV**) av_fetch(multi_char_matches, |
| 14199 | cp_count, FALSE); |
| 14200 | while ((this_sequence = av_pop(*this_array_ptr)) != |
| 14201 | &PL_sv_undef) |
| 14202 | { |
| 14203 | if (! first_time) { |
| 14204 | sv_catpv(substitute_parse, "|"); |
| 14205 | } |
| 14206 | first_time = FALSE; |
| 14207 | |
| 14208 | sv_catpv(substitute_parse, SvPVX(this_sequence)); |
| 14209 | } |
| 14210 | } |
| 14211 | } |
| 14212 | |
| 14213 | /* If the character class contains anything else besides these |
| 14214 | * multi-character folds, have to include it in recursive parsing */ |
| 14215 | if (element_count) { |
| 14216 | sv_catpv(substitute_parse, "|["); |
| 14217 | sv_catpvn(substitute_parse, orig_parse, RExC_parse - orig_parse); |
| 14218 | sv_catpv(substitute_parse, "]"); |
| 14219 | } |
| 14220 | |
| 14221 | sv_catpv(substitute_parse, ")"); |
| 14222 | #if 0 |
| 14223 | if (invert) { |
| 14224 | /* This is a way to get the parse to skip forward a whole named |
| 14225 | * sequence instead of matching the 2nd character when it fails the |
| 14226 | * first */ |
| 14227 | sv_catpv(substitute_parse, "(*THEN)(*SKIP)(*FAIL)|.)"); |
| 14228 | } |
| 14229 | #endif |
| 14230 | |
| 14231 | RExC_parse = SvPV(substitute_parse, len); |
| 14232 | RExC_end = RExC_parse + len; |
| 14233 | RExC_in_multi_char_class = 1; |
| 14234 | RExC_emit = (regnode *)orig_emit; |
| 14235 | |
| 14236 | ret = reg(pRExC_state, 1, ®_flags, depth+1); |
| 14237 | |
| 14238 | *flagp |= reg_flags&(HASWIDTH|SIMPLE|SPSTART|POSTPONED|RESTART_UTF8); |
| 14239 | |
| 14240 | RExC_parse = save_parse; |
| 14241 | RExC_end = save_end; |
| 14242 | RExC_in_multi_char_class = 0; |
| 14243 | SvREFCNT_dec_NN(multi_char_matches); |
| 14244 | return ret; |
| 14245 | } |
| 14246 | |
| 14247 | /* Here, we've gone through the entire class and dealt with multi-char |
| 14248 | * folds. We are now in a position that we can do some checks to see if we |
| 14249 | * can optimize this ANYOF node into a simpler one, even in Pass 1. |
| 14250 | * Currently we only do two checks: |
| 14251 | * 1) is in the unlikely event that the user has specified both, eg. \w and |
| 14252 | * \W under /l, then the class matches everything. (This optimization |
| 14253 | * is done only to make the optimizer code run later work.) |
| 14254 | * 2) if the character class contains only a single element (including a |
| 14255 | * single range), we see if there is an equivalent node for it. |
| 14256 | * Other checks are possible */ |
| 14257 | if (! ret_invlist /* Can't optimize if returning the constructed |
| 14258 | inversion list */ |
| 14259 | && (UNLIKELY(posixl_matches_all) || element_count == 1)) |
| 14260 | { |
| 14261 | U8 op = END; |
| 14262 | U8 arg = 0; |
| 14263 | |
| 14264 | if (UNLIKELY(posixl_matches_all)) { |
| 14265 | op = SANY; |
| 14266 | } |
| 14267 | else if (namedclass > OOB_NAMEDCLASS) { /* this is a named class, like |
| 14268 | \w or [:digit:] or \p{foo} |
| 14269 | */ |
| 14270 | |
| 14271 | /* All named classes are mapped into POSIXish nodes, with its FLAG |
| 14272 | * argument giving which class it is */ |
| 14273 | switch ((I32)namedclass) { |
| 14274 | case ANYOF_UNIPROP: |
| 14275 | break; |
| 14276 | |
| 14277 | /* These don't depend on the charset modifiers. They always |
| 14278 | * match under /u rules */ |
| 14279 | case ANYOF_NHORIZWS: |
| 14280 | case ANYOF_HORIZWS: |
| 14281 | namedclass = ANYOF_BLANK + namedclass - ANYOF_HORIZWS; |
| 14282 | /* FALLTHROUGH */ |
| 14283 | |
| 14284 | case ANYOF_NVERTWS: |
| 14285 | case ANYOF_VERTWS: |
| 14286 | op = POSIXU; |
| 14287 | goto join_posix; |
| 14288 | |
| 14289 | /* The actual POSIXish node for all the rest depends on the |
| 14290 | * charset modifier. The ones in the first set depend only on |
| 14291 | * ASCII or, if available on this platform, locale */ |
| 14292 | case ANYOF_ASCII: |
| 14293 | case ANYOF_NASCII: |
| 14294 | #ifdef HAS_ISASCII |
| 14295 | op = (LOC) ? POSIXL : POSIXA; |
| 14296 | #else |
| 14297 | op = POSIXA; |
| 14298 | #endif |
| 14299 | goto join_posix; |
| 14300 | |
| 14301 | case ANYOF_NCASED: |
| 14302 | case ANYOF_LOWER: |
| 14303 | case ANYOF_NLOWER: |
| 14304 | case ANYOF_UPPER: |
| 14305 | case ANYOF_NUPPER: |
| 14306 | /* under /a could be alpha */ |
| 14307 | if (FOLD) { |
| 14308 | if (ASCII_RESTRICTED) { |
| 14309 | namedclass = ANYOF_ALPHA + (namedclass % 2); |
| 14310 | } |
| 14311 | else if (! LOC) { |
| 14312 | break; |
| 14313 | } |
| 14314 | } |
| 14315 | /* FALLTHROUGH */ |
| 14316 | |
| 14317 | /* The rest have more possibilities depending on the charset. |
| 14318 | * We take advantage of the enum ordering of the charset |
| 14319 | * modifiers to get the exact node type, */ |
| 14320 | default: |
| 14321 | op = POSIXD + get_regex_charset(RExC_flags); |
| 14322 | if (op > POSIXA) { /* /aa is same as /a */ |
| 14323 | op = POSIXA; |
| 14324 | } |
| 14325 | |
| 14326 | join_posix: |
| 14327 | /* The odd numbered ones are the complements of the |
| 14328 | * next-lower even number one */ |
| 14329 | if (namedclass % 2 == 1) { |
| 14330 | invert = ! invert; |
| 14331 | namedclass--; |
| 14332 | } |
| 14333 | arg = namedclass_to_classnum(namedclass); |
| 14334 | break; |
| 14335 | } |
| 14336 | } |
| 14337 | else if (value == prevvalue) { |
| 14338 | |
| 14339 | /* Here, the class consists of just a single code point */ |
| 14340 | |
| 14341 | if (invert) { |
| 14342 | if (! LOC && value == '\n') { |
| 14343 | op = REG_ANY; /* Optimize [^\n] */ |
| 14344 | *flagp |= HASWIDTH|SIMPLE; |
| 14345 | RExC_naughty++; |
| 14346 | } |
| 14347 | } |
| 14348 | else if (value < 256 || UTF) { |
| 14349 | |
| 14350 | /* Optimize a single value into an EXACTish node, but not if it |
| 14351 | * would require converting the pattern to UTF-8. */ |
| 14352 | op = compute_EXACTish(pRExC_state); |
| 14353 | } |
| 14354 | } /* Otherwise is a range */ |
| 14355 | else if (! LOC) { /* locale could vary these */ |
| 14356 | if (prevvalue == '0') { |
| 14357 | if (value == '9') { |
| 14358 | arg = _CC_DIGIT; |
| 14359 | op = POSIXA; |
| 14360 | } |
| 14361 | } |
| 14362 | else if (prevvalue == 'A') { |
| 14363 | if (value == 'Z' |
| 14364 | #ifdef EBCDIC |
| 14365 | && literal_endpoint == 2 |
| 14366 | #endif |
| 14367 | ) { |
| 14368 | arg = (FOLD) ? _CC_ALPHA : _CC_UPPER; |
| 14369 | op = POSIXA; |
| 14370 | } |
| 14371 | } |
| 14372 | else if (prevvalue == 'a') { |
| 14373 | if (value == 'z' |
| 14374 | #ifdef EBCDIC |
| 14375 | && literal_endpoint == 2 |
| 14376 | #endif |
| 14377 | ) { |
| 14378 | arg = (FOLD) ? _CC_ALPHA : _CC_LOWER; |
| 14379 | op = POSIXA; |
| 14380 | } |
| 14381 | } |
| 14382 | } |
| 14383 | |
| 14384 | /* Here, we have changed <op> away from its initial value iff we found |
| 14385 | * an optimization */ |
| 14386 | if (op != END) { |
| 14387 | |
| 14388 | /* Throw away this ANYOF regnode, and emit the calculated one, |
| 14389 | * which should correspond to the beginning, not current, state of |
| 14390 | * the parse */ |
| 14391 | const char * cur_parse = RExC_parse; |
| 14392 | RExC_parse = (char *)orig_parse; |
| 14393 | if ( SIZE_ONLY) { |
| 14394 | if (! LOC) { |
| 14395 | |
| 14396 | /* To get locale nodes to not use the full ANYOF size would |
| 14397 | * require moving the code above that writes the portions |
| 14398 | * of it that aren't in other nodes to after this point. |
| 14399 | * e.g. ANYOF_POSIXL_SET */ |
| 14400 | RExC_size = orig_size; |
| 14401 | } |
| 14402 | } |
| 14403 | else { |
| 14404 | RExC_emit = (regnode *)orig_emit; |
| 14405 | if (PL_regkind[op] == POSIXD) { |
| 14406 | if (op == POSIXL) { |
| 14407 | RExC_contains_locale = 1; |
| 14408 | } |
| 14409 | if (invert) { |
| 14410 | op += NPOSIXD - POSIXD; |
| 14411 | } |
| 14412 | } |
| 14413 | } |
| 14414 | |
| 14415 | ret = reg_node(pRExC_state, op); |
| 14416 | |
| 14417 | if (PL_regkind[op] == POSIXD || PL_regkind[op] == NPOSIXD) { |
| 14418 | if (! SIZE_ONLY) { |
| 14419 | FLAGS(ret) = arg; |
| 14420 | } |
| 14421 | *flagp |= HASWIDTH|SIMPLE; |
| 14422 | } |
| 14423 | else if (PL_regkind[op] == EXACT) { |
| 14424 | alloc_maybe_populate_EXACT(pRExC_state, ret, flagp, 0, value, |
| 14425 | TRUE /* downgradable to EXACT */ |
| 14426 | ); |
| 14427 | } |
| 14428 | |
| 14429 | RExC_parse = (char *) cur_parse; |
| 14430 | |
| 14431 | SvREFCNT_dec(posixes); |
| 14432 | SvREFCNT_dec(nposixes); |
| 14433 | SvREFCNT_dec(cp_list); |
| 14434 | SvREFCNT_dec(cp_foldable_list); |
| 14435 | return ret; |
| 14436 | } |
| 14437 | } |
| 14438 | |
| 14439 | if (SIZE_ONLY) |
| 14440 | return ret; |
| 14441 | /****** !SIZE_ONLY (Pass 2) AFTER HERE *********/ |
| 14442 | |
| 14443 | /* If folding, we calculate all characters that could fold to or from the |
| 14444 | * ones already on the list */ |
| 14445 | if (cp_foldable_list) { |
| 14446 | if (FOLD) { |
| 14447 | UV start, end; /* End points of code point ranges */ |
| 14448 | |
| 14449 | SV* fold_intersection = NULL; |
| 14450 | SV** use_list; |
| 14451 | |
| 14452 | /* Our calculated list will be for Unicode rules. For locale |
| 14453 | * matching, we have to keep a separate list that is consulted at |
| 14454 | * runtime only when the locale indicates Unicode rules. For |
| 14455 | * non-locale, we just use to the general list */ |
| 14456 | if (LOC) { |
| 14457 | use_list = &only_utf8_locale_list; |
| 14458 | } |
| 14459 | else { |
| 14460 | use_list = &cp_list; |
| 14461 | } |
| 14462 | |
| 14463 | /* Only the characters in this class that participate in folds need |
| 14464 | * be checked. Get the intersection of this class and all the |
| 14465 | * possible characters that are foldable. This can quickly narrow |
| 14466 | * down a large class */ |
| 14467 | _invlist_intersection(PL_utf8_foldable, cp_foldable_list, |
| 14468 | &fold_intersection); |
| 14469 | |
| 14470 | /* The folds for all the Latin1 characters are hard-coded into this |
| 14471 | * program, but we have to go out to disk to get the others. */ |
| 14472 | if (invlist_highest(cp_foldable_list) >= 256) { |
| 14473 | |
| 14474 | /* This is a hash that for a particular fold gives all |
| 14475 | * characters that are involved in it */ |
| 14476 | if (! PL_utf8_foldclosures) { |
| 14477 | _load_PL_utf8_foldclosures(); |
| 14478 | } |
| 14479 | } |
| 14480 | |
| 14481 | /* Now look at the foldable characters in this class individually */ |
| 14482 | invlist_iterinit(fold_intersection); |
| 14483 | while (invlist_iternext(fold_intersection, &start, &end)) { |
| 14484 | UV j; |
| 14485 | |
| 14486 | /* Look at every character in the range */ |
| 14487 | for (j = start; j <= end; j++) { |
| 14488 | U8 foldbuf[UTF8_MAXBYTES_CASE+1]; |
| 14489 | STRLEN foldlen; |
| 14490 | SV** listp; |
| 14491 | |
| 14492 | if (j < 256) { |
| 14493 | |
| 14494 | if (IS_IN_SOME_FOLD_L1(j)) { |
| 14495 | |
| 14496 | /* ASCII is always matched; non-ASCII is matched |
| 14497 | * only under Unicode rules (which could happen |
| 14498 | * under /l if the locale is a UTF-8 one */ |
| 14499 | if (isASCII(j) || ! DEPENDS_SEMANTICS) { |
| 14500 | *use_list = add_cp_to_invlist(*use_list, |
| 14501 | PL_fold_latin1[j]); |
| 14502 | } |
| 14503 | else { |
| 14504 | depends_list = |
| 14505 | add_cp_to_invlist(depends_list, |
| 14506 | PL_fold_latin1[j]); |
| 14507 | } |
| 14508 | } |
| 14509 | |
| 14510 | if (HAS_NONLATIN1_SIMPLE_FOLD_CLOSURE(j) |
| 14511 | && (! isASCII(j) || ! ASCII_FOLD_RESTRICTED)) |
| 14512 | { |
| 14513 | add_above_Latin1_folds(pRExC_state, |
| 14514 | (U8) j, |
| 14515 | use_list); |
| 14516 | } |
| 14517 | continue; |
| 14518 | } |
| 14519 | |
| 14520 | /* Here is an above Latin1 character. We don't have the |
| 14521 | * rules hard-coded for it. First, get its fold. This is |
| 14522 | * the simple fold, as the multi-character folds have been |
| 14523 | * handled earlier and separated out */ |
| 14524 | _to_uni_fold_flags(j, foldbuf, &foldlen, |
| 14525 | (ASCII_FOLD_RESTRICTED) |
| 14526 | ? FOLD_FLAGS_NOMIX_ASCII |
| 14527 | : 0); |
| 14528 | |
| 14529 | /* Single character fold of above Latin1. Add everything in |
| 14530 | * its fold closure to the list that this node should match. |
| 14531 | * The fold closures data structure is a hash with the keys |
| 14532 | * being the UTF-8 of every character that is folded to, like |
| 14533 | * 'k', and the values each an array of all code points that |
| 14534 | * fold to its key. e.g. [ 'k', 'K', KELVIN_SIGN ]. |
| 14535 | * Multi-character folds are not included */ |
| 14536 | if ((listp = hv_fetch(PL_utf8_foldclosures, |
| 14537 | (char *) foldbuf, foldlen, FALSE))) |
| 14538 | { |
| 14539 | AV* list = (AV*) *listp; |
| 14540 | IV k; |
| 14541 | for (k = 0; k <= av_tindex(list); k++) { |
| 14542 | SV** c_p = av_fetch(list, k, FALSE); |
| 14543 | UV c; |
| 14544 | assert(c_p); |
| 14545 | |
| 14546 | c = SvUV(*c_p); |
| 14547 | |
| 14548 | /* /aa doesn't allow folds between ASCII and non- */ |
| 14549 | if ((ASCII_FOLD_RESTRICTED |
| 14550 | && (isASCII(c) != isASCII(j)))) |
| 14551 | { |
| 14552 | continue; |
| 14553 | } |
| 14554 | |
| 14555 | /* Folds under /l which cross the 255/256 boundary |
| 14556 | * are added to a separate list. (These are valid |
| 14557 | * only when the locale is UTF-8.) */ |
| 14558 | if (c < 256 && LOC) { |
| 14559 | *use_list = add_cp_to_invlist(*use_list, c); |
| 14560 | continue; |
| 14561 | } |
| 14562 | |
| 14563 | if (isASCII(c) || c > 255 || AT_LEAST_UNI_SEMANTICS) |
| 14564 | { |
| 14565 | cp_list = add_cp_to_invlist(cp_list, c); |
| 14566 | } |
| 14567 | else { |
| 14568 | /* Similarly folds involving non-ascii Latin1 |
| 14569 | * characters under /d are added to their list */ |
| 14570 | depends_list = add_cp_to_invlist(depends_list, |
| 14571 | c); |
| 14572 | } |
| 14573 | } |
| 14574 | } |
| 14575 | } |
| 14576 | } |
| 14577 | SvREFCNT_dec_NN(fold_intersection); |
| 14578 | } |
| 14579 | |
| 14580 | /* Now that we have finished adding all the folds, there is no reason |
| 14581 | * to keep the foldable list separate */ |
| 14582 | _invlist_union(cp_list, cp_foldable_list, &cp_list); |
| 14583 | SvREFCNT_dec_NN(cp_foldable_list); |
| 14584 | } |
| 14585 | |
| 14586 | /* And combine the result (if any) with any inversion list from posix |
| 14587 | * classes. The lists are kept separate up to now because we don't want to |
| 14588 | * fold the classes (folding of those is automatically handled by the swash |
| 14589 | * fetching code) */ |
| 14590 | if (posixes || nposixes) { |
| 14591 | if (posixes && AT_LEAST_ASCII_RESTRICTED) { |
| 14592 | /* Under /a and /aa, nothing above ASCII matches these */ |
| 14593 | _invlist_intersection(posixes, |
| 14594 | PL_XPosix_ptrs[_CC_ASCII], |
| 14595 | &posixes); |
| 14596 | } |
| 14597 | if (nposixes) { |
| 14598 | if (DEPENDS_SEMANTICS) { |
| 14599 | /* Under /d, everything in the upper half of the Latin1 range |
| 14600 | * matches these complements */ |
| 14601 | ANYOF_FLAGS(ret) |= ANYOF_NON_UTF8_NON_ASCII_ALL; |
| 14602 | } |
| 14603 | else if (AT_LEAST_ASCII_RESTRICTED) { |
| 14604 | /* Under /a and /aa, everything above ASCII matches these |
| 14605 | * complements */ |
| 14606 | _invlist_union_complement_2nd(nposixes, |
| 14607 | PL_XPosix_ptrs[_CC_ASCII], |
| 14608 | &nposixes); |
| 14609 | } |
| 14610 | if (posixes) { |
| 14611 | _invlist_union(posixes, nposixes, &posixes); |
| 14612 | SvREFCNT_dec_NN(nposixes); |
| 14613 | } |
| 14614 | else { |
| 14615 | posixes = nposixes; |
| 14616 | } |
| 14617 | } |
| 14618 | if (! DEPENDS_SEMANTICS) { |
| 14619 | if (cp_list) { |
| 14620 | _invlist_union(cp_list, posixes, &cp_list); |
| 14621 | SvREFCNT_dec_NN(posixes); |
| 14622 | } |
| 14623 | else { |
| 14624 | cp_list = posixes; |
| 14625 | } |
| 14626 | } |
| 14627 | else { |
| 14628 | /* Under /d, we put into a separate list the Latin1 things that |
| 14629 | * match only when the target string is utf8 */ |
| 14630 | SV* nonascii_but_latin1_properties = NULL; |
| 14631 | _invlist_intersection(posixes, PL_UpperLatin1, |
| 14632 | &nonascii_but_latin1_properties); |
| 14633 | _invlist_subtract(posixes, nonascii_but_latin1_properties, |
| 14634 | &posixes); |
| 14635 | if (cp_list) { |
| 14636 | _invlist_union(cp_list, posixes, &cp_list); |
| 14637 | SvREFCNT_dec_NN(posixes); |
| 14638 | } |
| 14639 | else { |
| 14640 | cp_list = posixes; |
| 14641 | } |
| 14642 | |
| 14643 | if (depends_list) { |
| 14644 | _invlist_union(depends_list, nonascii_but_latin1_properties, |
| 14645 | &depends_list); |
| 14646 | SvREFCNT_dec_NN(nonascii_but_latin1_properties); |
| 14647 | } |
| 14648 | else { |
| 14649 | depends_list = nonascii_but_latin1_properties; |
| 14650 | } |
| 14651 | } |
| 14652 | } |
| 14653 | |
| 14654 | /* And combine the result (if any) with any inversion list from properties. |
| 14655 | * The lists are kept separate up to now so that we can distinguish the two |
| 14656 | * in regards to matching above-Unicode. A run-time warning is generated |
| 14657 | * if a Unicode property is matched against a non-Unicode code point. But, |
| 14658 | * we allow user-defined properties to match anything, without any warning, |
| 14659 | * and we also suppress the warning if there is a portion of the character |
| 14660 | * class that isn't a Unicode property, and which matches above Unicode, \W |
| 14661 | * or [\x{110000}] for example. |
| 14662 | * (Note that in this case, unlike the Posix one above, there is no |
| 14663 | * <depends_list>, because having a Unicode property forces Unicode |
| 14664 | * semantics */ |
| 14665 | if (properties) { |
| 14666 | if (cp_list) { |
| 14667 | |
| 14668 | /* If it matters to the final outcome, see if a non-property |
| 14669 | * component of the class matches above Unicode. If so, the |
| 14670 | * warning gets suppressed. This is true even if just a single |
| 14671 | * such code point is specified, as though not strictly correct if |
| 14672 | * another such code point is matched against, the fact that they |
| 14673 | * are using above-Unicode code points indicates they should know |
| 14674 | * the issues involved */ |
| 14675 | if (warn_super) { |
| 14676 | warn_super = ! (invert |
| 14677 | ^ (invlist_highest(cp_list) > PERL_UNICODE_MAX)); |
| 14678 | } |
| 14679 | |
| 14680 | _invlist_union(properties, cp_list, &cp_list); |
| 14681 | SvREFCNT_dec_NN(properties); |
| 14682 | } |
| 14683 | else { |
| 14684 | cp_list = properties; |
| 14685 | } |
| 14686 | |
| 14687 | if (warn_super) { |
| 14688 | ANYOF_FLAGS(ret) |= ANYOF_WARN_SUPER; |
| 14689 | } |
| 14690 | } |
| 14691 | |
| 14692 | /* Here, we have calculated what code points should be in the character |
| 14693 | * class. |
| 14694 | * |
| 14695 | * Now we can see about various optimizations. Fold calculation (which we |
| 14696 | * did above) needs to take place before inversion. Otherwise /[^k]/i |
| 14697 | * would invert to include K, which under /i would match k, which it |
| 14698 | * shouldn't. Therefore we can't invert folded locale now, as it won't be |
| 14699 | * folded until runtime */ |
| 14700 | |
| 14701 | /* If we didn't do folding, it's because some information isn't available |
| 14702 | * until runtime; set the run-time fold flag for these. (We don't have to |
| 14703 | * worry about properties folding, as that is taken care of by the swash |
| 14704 | * fetching). We know to set the flag if we have a non-NULL list for UTF-8 |
| 14705 | * locales, or the class matches at least one 0-255 range code point */ |
| 14706 | if (LOC && FOLD) { |
| 14707 | if (only_utf8_locale_list) { |
| 14708 | ANYOF_FLAGS(ret) |= ANYOF_LOC_FOLD; |
| 14709 | } |
| 14710 | else if (cp_list) { /* Look to see if there a 0-255 code point is in |
| 14711 | the list */ |
| 14712 | UV start, end; |
| 14713 | invlist_iterinit(cp_list); |
| 14714 | if (invlist_iternext(cp_list, &start, &end) && start < 256) { |
| 14715 | ANYOF_FLAGS(ret) |= ANYOF_LOC_FOLD; |
| 14716 | } |
| 14717 | invlist_iterfinish(cp_list); |
| 14718 | } |
| 14719 | } |
| 14720 | |
| 14721 | /* Optimize inverted simple patterns (e.g. [^a-z]) when everything is known |
| 14722 | * at compile time. Besides not inverting folded locale now, we can't |
| 14723 | * invert if there are things such as \w, which aren't known until runtime |
| 14724 | * */ |
| 14725 | if (cp_list |
| 14726 | && invert |
| 14727 | && ! (ANYOF_FLAGS(ret) & (ANYOF_LOCALE_FLAGS)) |
| 14728 | && ! depends_list |
| 14729 | && ! HAS_NONLOCALE_RUNTIME_PROPERTY_DEFINITION) |
| 14730 | { |
| 14731 | _invlist_invert(cp_list); |
| 14732 | |
| 14733 | /* Any swash can't be used as-is, because we've inverted things */ |
| 14734 | if (swash) { |
| 14735 | SvREFCNT_dec_NN(swash); |
| 14736 | swash = NULL; |
| 14737 | } |
| 14738 | |
| 14739 | /* Clear the invert flag since have just done it here */ |
| 14740 | invert = FALSE; |
| 14741 | } |
| 14742 | |
| 14743 | if (ret_invlist) { |
| 14744 | *ret_invlist = cp_list; |
| 14745 | SvREFCNT_dec(swash); |
| 14746 | |
| 14747 | /* Discard the generated node */ |
| 14748 | if (SIZE_ONLY) { |
| 14749 | RExC_size = orig_size; |
| 14750 | } |
| 14751 | else { |
| 14752 | RExC_emit = orig_emit; |
| 14753 | } |
| 14754 | return orig_emit; |
| 14755 | } |
| 14756 | |
| 14757 | /* Some character classes are equivalent to other nodes. Such nodes take |
| 14758 | * up less room and generally fewer operations to execute than ANYOF nodes. |
| 14759 | * Above, we checked for and optimized into some such equivalents for |
| 14760 | * certain common classes that are easy to test. Getting to this point in |
| 14761 | * the code means that the class didn't get optimized there. Since this |
| 14762 | * code is only executed in Pass 2, it is too late to save space--it has |
| 14763 | * been allocated in Pass 1, and currently isn't given back. But turning |
| 14764 | * things into an EXACTish node can allow the optimizer to join it to any |
| 14765 | * adjacent such nodes. And if the class is equivalent to things like /./, |
| 14766 | * expensive run-time swashes can be avoided. Now that we have more |
| 14767 | * complete information, we can find things necessarily missed by the |
| 14768 | * earlier code. I (khw) am not sure how much to look for here. It would |
| 14769 | * be easy, but perhaps too slow, to check any candidates against all the |
| 14770 | * node types they could possibly match using _invlistEQ(). */ |
| 14771 | |
| 14772 | if (cp_list |
| 14773 | && ! invert |
| 14774 | && ! depends_list |
| 14775 | && ! (ANYOF_FLAGS(ret) & (ANYOF_LOCALE_FLAGS)) |
| 14776 | && ! HAS_NONLOCALE_RUNTIME_PROPERTY_DEFINITION |
| 14777 | |
| 14778 | /* We don't optimize if we are supposed to make sure all non-Unicode |
| 14779 | * code points raise a warning, as only ANYOF nodes have this check. |
| 14780 | * */ |
| 14781 | && ! ((ANYOF_FLAGS(ret) & ANYOF_WARN_SUPER) && ALWAYS_WARN_SUPER)) |
| 14782 | { |
| 14783 | UV start, end; |
| 14784 | U8 op = END; /* The optimzation node-type */ |
| 14785 | const char * cur_parse= RExC_parse; |
| 14786 | |
| 14787 | invlist_iterinit(cp_list); |
| 14788 | if (! invlist_iternext(cp_list, &start, &end)) { |
| 14789 | |
| 14790 | /* Here, the list is empty. This happens, for example, when a |
| 14791 | * Unicode property is the only thing in the character class, and |
| 14792 | * it doesn't match anything. (perluniprops.pod notes such |
| 14793 | * properties) */ |
| 14794 | op = OPFAIL; |
| 14795 | *flagp |= HASWIDTH|SIMPLE; |
| 14796 | } |
| 14797 | else if (start == end) { /* The range is a single code point */ |
| 14798 | if (! invlist_iternext(cp_list, &start, &end) |
| 14799 | |
| 14800 | /* Don't do this optimization if it would require changing |
| 14801 | * the pattern to UTF-8 */ |
| 14802 | && (start < 256 || UTF)) |
| 14803 | { |
| 14804 | /* Here, the list contains a single code point. Can optimize |
| 14805 | * into an EXACTish node */ |
| 14806 | |
| 14807 | value = start; |
| 14808 | |
| 14809 | if (! FOLD) { |
| 14810 | op = EXACT; |
| 14811 | } |
| 14812 | else if (LOC) { |
| 14813 | |
| 14814 | /* A locale node under folding with one code point can be |
| 14815 | * an EXACTFL, as its fold won't be calculated until |
| 14816 | * runtime */ |
| 14817 | op = EXACTFL; |
| 14818 | } |
| 14819 | else { |
| 14820 | |
| 14821 | /* Here, we are generally folding, but there is only one |
| 14822 | * code point to match. If we have to, we use an EXACT |
| 14823 | * node, but it would be better for joining with adjacent |
| 14824 | * nodes in the optimization pass if we used the same |
| 14825 | * EXACTFish node that any such are likely to be. We can |
| 14826 | * do this iff the code point doesn't participate in any |
| 14827 | * folds. For example, an EXACTF of a colon is the same as |
| 14828 | * an EXACT one, since nothing folds to or from a colon. */ |
| 14829 | if (value < 256) { |
| 14830 | if (IS_IN_SOME_FOLD_L1(value)) { |
| 14831 | op = EXACT; |
| 14832 | } |
| 14833 | } |
| 14834 | else { |
| 14835 | if (_invlist_contains_cp(PL_utf8_foldable, value)) { |
| 14836 | op = EXACT; |
| 14837 | } |
| 14838 | } |
| 14839 | |
| 14840 | /* If we haven't found the node type, above, it means we |
| 14841 | * can use the prevailing one */ |
| 14842 | if (op == END) { |
| 14843 | op = compute_EXACTish(pRExC_state); |
| 14844 | } |
| 14845 | } |
| 14846 | } |
| 14847 | } |
| 14848 | else if (start == 0) { |
| 14849 | if (end == UV_MAX) { |
| 14850 | op = SANY; |
| 14851 | *flagp |= HASWIDTH|SIMPLE; |
| 14852 | RExC_naughty++; |
| 14853 | } |
| 14854 | else if (end == '\n' - 1 |
| 14855 | && invlist_iternext(cp_list, &start, &end) |
| 14856 | && start == '\n' + 1 && end == UV_MAX) |
| 14857 | { |
| 14858 | op = REG_ANY; |
| 14859 | *flagp |= HASWIDTH|SIMPLE; |
| 14860 | RExC_naughty++; |
| 14861 | } |
| 14862 | } |
| 14863 | invlist_iterfinish(cp_list); |
| 14864 | |
| 14865 | if (op != END) { |
| 14866 | RExC_parse = (char *)orig_parse; |
| 14867 | RExC_emit = (regnode *)orig_emit; |
| 14868 | |
| 14869 | ret = reg_node(pRExC_state, op); |
| 14870 | |
| 14871 | RExC_parse = (char *)cur_parse; |
| 14872 | |
| 14873 | if (PL_regkind[op] == EXACT) { |
| 14874 | alloc_maybe_populate_EXACT(pRExC_state, ret, flagp, 0, value, |
| 14875 | TRUE /* downgradable to EXACT */ |
| 14876 | ); |
| 14877 | } |
| 14878 | |
| 14879 | SvREFCNT_dec_NN(cp_list); |
| 14880 | return ret; |
| 14881 | } |
| 14882 | } |
| 14883 | |
| 14884 | /* Here, <cp_list> contains all the code points we can determine at |
| 14885 | * compile time that match under all conditions. Go through it, and |
| 14886 | * for things that belong in the bitmap, put them there, and delete from |
| 14887 | * <cp_list>. While we are at it, see if everything above 255 is in the |
| 14888 | * list, and if so, set a flag to speed up execution */ |
| 14889 | |
| 14890 | populate_ANYOF_from_invlist(ret, &cp_list); |
| 14891 | |
| 14892 | if (invert) { |
| 14893 | ANYOF_FLAGS(ret) |= ANYOF_INVERT; |
| 14894 | } |
| 14895 | |
| 14896 | /* Here, the bitmap has been populated with all the Latin1 code points that |
| 14897 | * always match. Can now add to the overall list those that match only |
| 14898 | * when the target string is UTF-8 (<depends_list>). */ |
| 14899 | if (depends_list) { |
| 14900 | if (cp_list) { |
| 14901 | _invlist_union(cp_list, depends_list, &cp_list); |
| 14902 | SvREFCNT_dec_NN(depends_list); |
| 14903 | } |
| 14904 | else { |
| 14905 | cp_list = depends_list; |
| 14906 | } |
| 14907 | ANYOF_FLAGS(ret) |= ANYOF_UTF8; |
| 14908 | } |
| 14909 | |
| 14910 | /* If there is a swash and more than one element, we can't use the swash in |
| 14911 | * the optimization below. */ |
| 14912 | if (swash && element_count > 1) { |
| 14913 | SvREFCNT_dec_NN(swash); |
| 14914 | swash = NULL; |
| 14915 | } |
| 14916 | |
| 14917 | /* Note that the optimization of using 'swash' if it is the only thing in |
| 14918 | * the class doesn't have us change swash at all, so it can include things |
| 14919 | * that are also in the bitmap; otherwise we have purposely deleted that |
| 14920 | * duplicate information */ |
| 14921 | set_ANYOF_arg(pRExC_state, ret, cp_list, |
| 14922 | (HAS_NONLOCALE_RUNTIME_PROPERTY_DEFINITION) |
| 14923 | ? listsv : NULL, |
| 14924 | only_utf8_locale_list, |
| 14925 | swash, has_user_defined_property); |
| 14926 | |
| 14927 | *flagp |= HASWIDTH|SIMPLE; |
| 14928 | |
| 14929 | if (ANYOF_FLAGS(ret) & ANYOF_LOCALE_FLAGS) { |
| 14930 | RExC_contains_locale = 1; |
| 14931 | } |
| 14932 | |
| 14933 | return ret; |
| 14934 | } |
| 14935 | |
| 14936 | #undef HAS_NONLOCALE_RUNTIME_PROPERTY_DEFINITION |
| 14937 | |
| 14938 | STATIC void |
| 14939 | S_set_ANYOF_arg(pTHX_ RExC_state_t* const pRExC_state, |
| 14940 | regnode* const node, |
| 14941 | SV* const cp_list, |
| 14942 | SV* const runtime_defns, |
| 14943 | SV* const only_utf8_locale_list, |
| 14944 | SV* const swash, |
| 14945 | const bool has_user_defined_property) |
| 14946 | { |
| 14947 | /* Sets the arg field of an ANYOF-type node 'node', using information about |
| 14948 | * the node passed-in. If there is nothing outside the node's bitmap, the |
| 14949 | * arg is set to ANYOF_NONBITMAP_EMPTY. Otherwise, it sets the argument to |
| 14950 | * the count returned by add_data(), having allocated and stored an array, |
| 14951 | * av, that that count references, as follows: |
| 14952 | * av[0] stores the character class description in its textual form. |
| 14953 | * This is used later (regexec.c:Perl_regclass_swash()) to |
| 14954 | * initialize the appropriate swash, and is also useful for dumping |
| 14955 | * the regnode. This is set to &PL_sv_undef if the textual |
| 14956 | * description is not needed at run-time (as happens if the other |
| 14957 | * elements completely define the class) |
| 14958 | * av[1] if &PL_sv_undef, is a placeholder to later contain the swash |
| 14959 | * computed from av[0]. But if no further computation need be done, |
| 14960 | * the swash is stored here now (and av[0] is &PL_sv_undef). |
| 14961 | * av[2] stores the inversion list of code points that match only if the |
| 14962 | * current locale is UTF-8 |
| 14963 | * av[3] stores the cp_list inversion list for use in addition or instead |
| 14964 | * of av[0]; used only if cp_list exists and av[1] is &PL_sv_undef. |
| 14965 | * (Otherwise everything needed is already in av[0] and av[1]) |
| 14966 | * av[4] is set if any component of the class is from a user-defined |
| 14967 | * property; used only if av[3] exists */ |
| 14968 | |
| 14969 | UV n; |
| 14970 | |
| 14971 | PERL_ARGS_ASSERT_SET_ANYOF_ARG; |
| 14972 | |
| 14973 | if (! cp_list && ! runtime_defns && ! only_utf8_locale_list) { |
| 14974 | assert(! (ANYOF_FLAGS(node) |
| 14975 | & (ANYOF_UTF8|ANYOF_NONBITMAP_NON_UTF8))); |
| 14976 | ARG_SET(node, ANYOF_NONBITMAP_EMPTY); |
| 14977 | } |
| 14978 | else { |
| 14979 | AV * const av = newAV(); |
| 14980 | SV *rv; |
| 14981 | |
| 14982 | assert(ANYOF_FLAGS(node) |
| 14983 | & (ANYOF_UTF8|ANYOF_NONBITMAP_NON_UTF8|ANYOF_LOC_FOLD)); |
| 14984 | |
| 14985 | av_store(av, 0, (runtime_defns) |
| 14986 | ? SvREFCNT_inc(runtime_defns) : &PL_sv_undef); |
| 14987 | if (swash) { |
| 14988 | assert(cp_list); |
| 14989 | av_store(av, 1, swash); |
| 14990 | SvREFCNT_dec_NN(cp_list); |
| 14991 | } |
| 14992 | else { |
| 14993 | av_store(av, 1, &PL_sv_undef); |
| 14994 | if (cp_list) { |
| 14995 | av_store(av, 3, cp_list); |
| 14996 | av_store(av, 4, newSVuv(has_user_defined_property)); |
| 14997 | } |
| 14998 | } |
| 14999 | |
| 15000 | if (only_utf8_locale_list) { |
| 15001 | av_store(av, 2, only_utf8_locale_list); |
| 15002 | } |
| 15003 | else { |
| 15004 | av_store(av, 2, &PL_sv_undef); |
| 15005 | } |
| 15006 | |
| 15007 | rv = newRV_noinc(MUTABLE_SV(av)); |
| 15008 | n = add_data(pRExC_state, STR_WITH_LEN("s")); |
| 15009 | RExC_rxi->data->data[n] = (void*)rv; |
| 15010 | ARG_SET(node, n); |
| 15011 | } |
| 15012 | } |
| 15013 | |
| 15014 | #if !defined(PERL_IN_XSUB_RE) || defined(PLUGGABLE_RE_EXTENSION) |
| 15015 | SV * |
| 15016 | Perl__get_regclass_nonbitmap_data(pTHX_ const regexp *prog, |
| 15017 | const regnode* node, |
| 15018 | bool doinit, |
| 15019 | SV** listsvp, |
| 15020 | SV** only_utf8_locale_ptr, |
| 15021 | SV* exclude_list) |
| 15022 | |
| 15023 | { |
| 15024 | /* For internal core use only. |
| 15025 | * Returns the swash for the input 'node' in the regex 'prog'. |
| 15026 | * If <doinit> is 'true', will attempt to create the swash if not already |
| 15027 | * done. |
| 15028 | * If <listsvp> is non-null, will return the printable contents of the |
| 15029 | * swash. This can be used to get debugging information even before the |
| 15030 | * swash exists, by calling this function with 'doinit' set to false, in |
| 15031 | * which case the components that will be used to eventually create the |
| 15032 | * swash are returned (in a printable form). |
| 15033 | * If <exclude_list> is not NULL, it is an inversion list of things to |
| 15034 | * exclude from what's returned in <listsvp>. |
| 15035 | * Tied intimately to how S_set_ANYOF_arg sets up the data structure. Note |
| 15036 | * that, in spite of this function's name, the swash it returns may include |
| 15037 | * the bitmap data as well */ |
| 15038 | |
| 15039 | SV *sw = NULL; |
| 15040 | SV *si = NULL; /* Input swash initialization string */ |
| 15041 | SV* invlist = NULL; |
| 15042 | |
| 15043 | RXi_GET_DECL(prog,progi); |
| 15044 | const struct reg_data * const data = prog ? progi->data : NULL; |
| 15045 | |
| 15046 | PERL_ARGS_ASSERT__GET_REGCLASS_NONBITMAP_DATA; |
| 15047 | |
| 15048 | assert(ANYOF_FLAGS(node) |
| 15049 | & (ANYOF_UTF8|ANYOF_NONBITMAP_NON_UTF8|ANYOF_LOC_FOLD)); |
| 15050 | |
| 15051 | if (data && data->count) { |
| 15052 | const U32 n = ARG(node); |
| 15053 | |
| 15054 | if (data->what[n] == 's') { |
| 15055 | SV * const rv = MUTABLE_SV(data->data[n]); |
| 15056 | AV * const av = MUTABLE_AV(SvRV(rv)); |
| 15057 | SV **const ary = AvARRAY(av); |
| 15058 | U8 swash_init_flags = _CORE_SWASH_INIT_ACCEPT_INVLIST; |
| 15059 | |
| 15060 | si = *ary; /* ary[0] = the string to initialize the swash with */ |
| 15061 | |
| 15062 | /* Elements 3 and 4 are either both present or both absent. [3] is |
| 15063 | * any inversion list generated at compile time; [4] indicates if |
| 15064 | * that inversion list has any user-defined properties in it. */ |
| 15065 | if (av_tindex(av) >= 2) { |
| 15066 | if (only_utf8_locale_ptr |
| 15067 | && ary[2] |
| 15068 | && ary[2] != &PL_sv_undef) |
| 15069 | { |
| 15070 | *only_utf8_locale_ptr = ary[2]; |
| 15071 | } |
| 15072 | else { |
| 15073 | assert(only_utf8_locale_ptr); |
| 15074 | *only_utf8_locale_ptr = NULL; |
| 15075 | } |
| 15076 | |
| 15077 | if (av_tindex(av) >= 3) { |
| 15078 | invlist = ary[3]; |
| 15079 | if (SvUV(ary[4])) { |
| 15080 | swash_init_flags |= _CORE_SWASH_INIT_USER_DEFINED_PROPERTY; |
| 15081 | } |
| 15082 | } |
| 15083 | else { |
| 15084 | invlist = NULL; |
| 15085 | } |
| 15086 | } |
| 15087 | |
| 15088 | /* Element [1] is reserved for the set-up swash. If already there, |
| 15089 | * return it; if not, create it and store it there */ |
| 15090 | if (ary[1] && SvROK(ary[1])) { |
| 15091 | sw = ary[1]; |
| 15092 | } |
| 15093 | else if (doinit && ((si && si != &PL_sv_undef) |
| 15094 | || (invlist && invlist != &PL_sv_undef))) { |
| 15095 | assert(si); |
| 15096 | sw = _core_swash_init("utf8", /* the utf8 package */ |
| 15097 | "", /* nameless */ |
| 15098 | si, |
| 15099 | 1, /* binary */ |
| 15100 | 0, /* not from tr/// */ |
| 15101 | invlist, |
| 15102 | &swash_init_flags); |
| 15103 | (void)av_store(av, 1, sw); |
| 15104 | } |
| 15105 | } |
| 15106 | } |
| 15107 | |
| 15108 | /* If requested, return a printable version of what this swash matches */ |
| 15109 | if (listsvp) { |
| 15110 | SV* matches_string = newSVpvs(""); |
| 15111 | |
| 15112 | /* The swash should be used, if possible, to get the data, as it |
| 15113 | * contains the resolved data. But this function can be called at |
| 15114 | * compile-time, before everything gets resolved, in which case we |
| 15115 | * return the currently best available information, which is the string |
| 15116 | * that will eventually be used to do that resolving, 'si' */ |
| 15117 | if ((! sw || (invlist = _get_swash_invlist(sw)) == NULL) |
| 15118 | && (si && si != &PL_sv_undef)) |
| 15119 | { |
| 15120 | sv_catsv(matches_string, si); |
| 15121 | } |
| 15122 | |
| 15123 | /* Add the inversion list to whatever we have. This may have come from |
| 15124 | * the swash, or from an input parameter */ |
| 15125 | if (invlist) { |
| 15126 | if (exclude_list) { |
| 15127 | SV* clone = invlist_clone(invlist); |
| 15128 | _invlist_subtract(clone, exclude_list, &clone); |
| 15129 | sv_catsv(matches_string, _invlist_contents(clone)); |
| 15130 | SvREFCNT_dec_NN(clone); |
| 15131 | } |
| 15132 | else { |
| 15133 | sv_catsv(matches_string, _invlist_contents(invlist)); |
| 15134 | } |
| 15135 | } |
| 15136 | *listsvp = matches_string; |
| 15137 | } |
| 15138 | |
| 15139 | return sw; |
| 15140 | } |
| 15141 | #endif /* !defined(PERL_IN_XSUB_RE) || defined(PLUGGABLE_RE_EXTENSION) */ |
| 15142 | |
| 15143 | /* reg_skipcomment() |
| 15144 | |
| 15145 | Absorbs an /x style # comment from the input stream, |
| 15146 | returning a pointer to the first character beyond the comment, or if the |
| 15147 | comment terminates the pattern without anything following it, this returns |
| 15148 | one past the final character of the pattern (in other words, RExC_end) and |
| 15149 | sets the REG_RUN_ON_COMMENT_SEEN flag. |
| 15150 | |
| 15151 | Note it's the callers responsibility to ensure that we are |
| 15152 | actually in /x mode |
| 15153 | |
| 15154 | */ |
| 15155 | |
| 15156 | PERL_STATIC_INLINE char* |
| 15157 | S_reg_skipcomment(RExC_state_t *pRExC_state, char* p) |
| 15158 | { |
| 15159 | PERL_ARGS_ASSERT_REG_SKIPCOMMENT; |
| 15160 | |
| 15161 | assert(*p == '#'); |
| 15162 | |
| 15163 | while (p < RExC_end) { |
| 15164 | if (*(++p) == '\n') { |
| 15165 | return p+1; |
| 15166 | } |
| 15167 | } |
| 15168 | |
| 15169 | /* we ran off the end of the pattern without ending the comment, so we have |
| 15170 | * to add an \n when wrapping */ |
| 15171 | RExC_seen |= REG_RUN_ON_COMMENT_SEEN; |
| 15172 | return p; |
| 15173 | } |
| 15174 | |
| 15175 | /* nextchar() |
| 15176 | |
| 15177 | Advances the parse position, and optionally absorbs |
| 15178 | "whitespace" from the inputstream. |
| 15179 | |
| 15180 | Without /x "whitespace" means (?#...) style comments only, |
| 15181 | with /x this means (?#...) and # comments and whitespace proper. |
| 15182 | |
| 15183 | Returns the RExC_parse point from BEFORE the scan occurs. |
| 15184 | |
| 15185 | This is the /x friendly way of saying RExC_parse++. |
| 15186 | */ |
| 15187 | |
| 15188 | STATIC char* |
| 15189 | S_nextchar(pTHX_ RExC_state_t *pRExC_state) |
| 15190 | { |
| 15191 | char* const retval = RExC_parse++; |
| 15192 | |
| 15193 | PERL_ARGS_ASSERT_NEXTCHAR; |
| 15194 | |
| 15195 | for (;;) { |
| 15196 | if (RExC_end - RExC_parse >= 3 |
| 15197 | && *RExC_parse == '(' |
| 15198 | && RExC_parse[1] == '?' |
| 15199 | && RExC_parse[2] == '#') |
| 15200 | { |
| 15201 | while (*RExC_parse != ')') { |
| 15202 | if (RExC_parse == RExC_end) |
| 15203 | FAIL("Sequence (?#... not terminated"); |
| 15204 | RExC_parse++; |
| 15205 | } |
| 15206 | RExC_parse++; |
| 15207 | continue; |
| 15208 | } |
| 15209 | if (RExC_flags & RXf_PMf_EXTENDED) { |
| 15210 | char * p = regpatws(pRExC_state, RExC_parse, |
| 15211 | TRUE); /* means recognize comments */ |
| 15212 | if (p != RExC_parse) { |
| 15213 | RExC_parse = p; |
| 15214 | continue; |
| 15215 | } |
| 15216 | } |
| 15217 | return retval; |
| 15218 | } |
| 15219 | } |
| 15220 | |
| 15221 | /* |
| 15222 | - reg_node - emit a node |
| 15223 | */ |
| 15224 | STATIC regnode * /* Location. */ |
| 15225 | S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op) |
| 15226 | { |
| 15227 | regnode *ptr; |
| 15228 | regnode * const ret = RExC_emit; |
| 15229 | GET_RE_DEBUG_FLAGS_DECL; |
| 15230 | |
| 15231 | PERL_ARGS_ASSERT_REG_NODE; |
| 15232 | |
| 15233 | if (SIZE_ONLY) { |
| 15234 | SIZE_ALIGN(RExC_size); |
| 15235 | RExC_size += 1; |
| 15236 | return(ret); |
| 15237 | } |
| 15238 | if (RExC_emit >= RExC_emit_bound) |
| 15239 | Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d, %p>=%p", |
| 15240 | op, (void*)RExC_emit, (void*)RExC_emit_bound); |
| 15241 | |
| 15242 | NODE_ALIGN_FILL(ret); |
| 15243 | ptr = ret; |
| 15244 | FILL_ADVANCE_NODE(ptr, op); |
| 15245 | #ifdef RE_TRACK_PATTERN_OFFSETS |
| 15246 | if (RExC_offsets) { /* MJD */ |
| 15247 | MJD_OFFSET_DEBUG( |
| 15248 | ("%s:%d: (op %s) %s %"UVuf" (len %"UVuf") (max %"UVuf").\n", |
| 15249 | "reg_node", __LINE__, |
| 15250 | PL_reg_name[op], |
| 15251 | (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] |
| 15252 | ? "Overwriting end of array!\n" : "OK", |
| 15253 | (UV)(RExC_emit - RExC_emit_start), |
| 15254 | (UV)(RExC_parse - RExC_start), |
| 15255 | (UV)RExC_offsets[0])); |
| 15256 | Set_Node_Offset(RExC_emit, RExC_parse + (op == END)); |
| 15257 | } |
| 15258 | #endif |
| 15259 | RExC_emit = ptr; |
| 15260 | return(ret); |
| 15261 | } |
| 15262 | |
| 15263 | /* |
| 15264 | - reganode - emit a node with an argument |
| 15265 | */ |
| 15266 | STATIC regnode * /* Location. */ |
| 15267 | S_reganode(pTHX_ RExC_state_t *pRExC_state, U8 op, U32 arg) |
| 15268 | { |
| 15269 | regnode *ptr; |
| 15270 | regnode * const ret = RExC_emit; |
| 15271 | GET_RE_DEBUG_FLAGS_DECL; |
| 15272 | |
| 15273 | PERL_ARGS_ASSERT_REGANODE; |
| 15274 | |
| 15275 | if (SIZE_ONLY) { |
| 15276 | SIZE_ALIGN(RExC_size); |
| 15277 | RExC_size += 2; |
| 15278 | /* |
| 15279 | We can't do this: |
| 15280 | |
| 15281 | assert(2==regarglen[op]+1); |
| 15282 | |
| 15283 | Anything larger than this has to allocate the extra amount. |
| 15284 | If we changed this to be: |
| 15285 | |
| 15286 | RExC_size += (1 + regarglen[op]); |
| 15287 | |
| 15288 | then it wouldn't matter. Its not clear what side effect |
| 15289 | might come from that so its not done so far. |
| 15290 | -- dmq |
| 15291 | */ |
| 15292 | return(ret); |
| 15293 | } |
| 15294 | if (RExC_emit >= RExC_emit_bound) |
| 15295 | Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d, %p>=%p", |
| 15296 | op, (void*)RExC_emit, (void*)RExC_emit_bound); |
| 15297 | |
| 15298 | NODE_ALIGN_FILL(ret); |
| 15299 | ptr = ret; |
| 15300 | FILL_ADVANCE_NODE_ARG(ptr, op, arg); |
| 15301 | #ifdef RE_TRACK_PATTERN_OFFSETS |
| 15302 | if (RExC_offsets) { /* MJD */ |
| 15303 | MJD_OFFSET_DEBUG( |
| 15304 | ("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n", |
| 15305 | "reganode", |
| 15306 | __LINE__, |
| 15307 | PL_reg_name[op], |
| 15308 | (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] ? |
| 15309 | "Overwriting end of array!\n" : "OK", |
| 15310 | (UV)(RExC_emit - RExC_emit_start), |
| 15311 | (UV)(RExC_parse - RExC_start), |
| 15312 | (UV)RExC_offsets[0])); |
| 15313 | Set_Cur_Node_Offset; |
| 15314 | } |
| 15315 | #endif |
| 15316 | RExC_emit = ptr; |
| 15317 | return(ret); |
| 15318 | } |
| 15319 | |
| 15320 | /* |
| 15321 | - reguni - emit (if appropriate) a Unicode character |
| 15322 | */ |
| 15323 | PERL_STATIC_INLINE STRLEN |
| 15324 | S_reguni(pTHX_ const RExC_state_t *pRExC_state, UV uv, char* s) |
| 15325 | { |
| 15326 | PERL_ARGS_ASSERT_REGUNI; |
| 15327 | |
| 15328 | return SIZE_ONLY ? UNISKIP(uv) : (uvchr_to_utf8((U8*)s, uv) - (U8*)s); |
| 15329 | } |
| 15330 | |
| 15331 | /* |
| 15332 | - reginsert - insert an operator in front of already-emitted operand |
| 15333 | * |
| 15334 | * Means relocating the operand. |
| 15335 | */ |
| 15336 | STATIC void |
| 15337 | S_reginsert(pTHX_ RExC_state_t *pRExC_state, U8 op, regnode *opnd, U32 depth) |
| 15338 | { |
| 15339 | regnode *src; |
| 15340 | regnode *dst; |
| 15341 | regnode *place; |
| 15342 | const int offset = regarglen[(U8)op]; |
| 15343 | const int size = NODE_STEP_REGNODE + offset; |
| 15344 | GET_RE_DEBUG_FLAGS_DECL; |
| 15345 | |
| 15346 | PERL_ARGS_ASSERT_REGINSERT; |
| 15347 | PERL_UNUSED_CONTEXT; |
| 15348 | PERL_UNUSED_ARG(depth); |
| 15349 | /* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */ |
| 15350 | DEBUG_PARSE_FMT("inst"," - %s",PL_reg_name[op]); |
| 15351 | if (SIZE_ONLY) { |
| 15352 | RExC_size += size; |
| 15353 | return; |
| 15354 | } |
| 15355 | |
| 15356 | src = RExC_emit; |
| 15357 | RExC_emit += size; |
| 15358 | dst = RExC_emit; |
| 15359 | if (RExC_open_parens) { |
| 15360 | int paren; |
| 15361 | /*DEBUG_PARSE_FMT("inst"," - %"IVdf, (IV)RExC_npar);*/ |
| 15362 | for ( paren=0 ; paren < RExC_npar ; paren++ ) { |
| 15363 | if ( RExC_open_parens[paren] >= opnd ) { |
| 15364 | /*DEBUG_PARSE_FMT("open"," - %d",size);*/ |
| 15365 | RExC_open_parens[paren] += size; |
| 15366 | } else { |
| 15367 | /*DEBUG_PARSE_FMT("open"," - %s","ok");*/ |
| 15368 | } |
| 15369 | if ( RExC_close_parens[paren] >= opnd ) { |
| 15370 | /*DEBUG_PARSE_FMT("close"," - %d",size);*/ |
| 15371 | RExC_close_parens[paren] += size; |
| 15372 | } else { |
| 15373 | /*DEBUG_PARSE_FMT("close"," - %s","ok");*/ |
| 15374 | } |
| 15375 | } |
| 15376 | } |
| 15377 | |
| 15378 | while (src > opnd) { |
| 15379 | StructCopy(--src, --dst, regnode); |
| 15380 | #ifdef RE_TRACK_PATTERN_OFFSETS |
| 15381 | if (RExC_offsets) { /* MJD 20010112 */ |
| 15382 | MJD_OFFSET_DEBUG( |
| 15383 | ("%s(%d): (op %s) %s copy %"UVuf" -> %"UVuf" (max %"UVuf").\n", |
| 15384 | "reg_insert", |
| 15385 | __LINE__, |
| 15386 | PL_reg_name[op], |
| 15387 | (UV)(dst - RExC_emit_start) > RExC_offsets[0] |
| 15388 | ? "Overwriting end of array!\n" : "OK", |
| 15389 | (UV)(src - RExC_emit_start), |
| 15390 | (UV)(dst - RExC_emit_start), |
| 15391 | (UV)RExC_offsets[0])); |
| 15392 | Set_Node_Offset_To_R(dst-RExC_emit_start, Node_Offset(src)); |
| 15393 | Set_Node_Length_To_R(dst-RExC_emit_start, Node_Length(src)); |
| 15394 | } |
| 15395 | #endif |
| 15396 | } |
| 15397 | |
| 15398 | |
| 15399 | place = opnd; /* Op node, where operand used to be. */ |
| 15400 | #ifdef RE_TRACK_PATTERN_OFFSETS |
| 15401 | if (RExC_offsets) { /* MJD */ |
| 15402 | MJD_OFFSET_DEBUG( |
| 15403 | ("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n", |
| 15404 | "reginsert", |
| 15405 | __LINE__, |
| 15406 | PL_reg_name[op], |
| 15407 | (UV)(place - RExC_emit_start) > RExC_offsets[0] |
| 15408 | ? "Overwriting end of array!\n" : "OK", |
| 15409 | (UV)(place - RExC_emit_start), |
| 15410 | (UV)(RExC_parse - RExC_start), |
| 15411 | (UV)RExC_offsets[0])); |
| 15412 | Set_Node_Offset(place, RExC_parse); |
| 15413 | Set_Node_Length(place, 1); |
| 15414 | } |
| 15415 | #endif |
| 15416 | src = NEXTOPER(place); |
| 15417 | FILL_ADVANCE_NODE(place, op); |
| 15418 | Zero(src, offset, regnode); |
| 15419 | } |
| 15420 | |
| 15421 | /* |
| 15422 | - regtail - set the next-pointer at the end of a node chain of p to val. |
| 15423 | - SEE ALSO: regtail_study |
| 15424 | */ |
| 15425 | /* TODO: All three parms should be const */ |
| 15426 | STATIC void |
| 15427 | S_regtail(pTHX_ RExC_state_t *pRExC_state, regnode *p, |
| 15428 | const regnode *val,U32 depth) |
| 15429 | { |
| 15430 | regnode *scan; |
| 15431 | GET_RE_DEBUG_FLAGS_DECL; |
| 15432 | |
| 15433 | PERL_ARGS_ASSERT_REGTAIL; |
| 15434 | #ifndef DEBUGGING |
| 15435 | PERL_UNUSED_ARG(depth); |
| 15436 | #endif |
| 15437 | |
| 15438 | if (SIZE_ONLY) |
| 15439 | return; |
| 15440 | |
| 15441 | /* Find last node. */ |
| 15442 | scan = p; |
| 15443 | for (;;) { |
| 15444 | regnode * const temp = regnext(scan); |
| 15445 | DEBUG_PARSE_r({ |
| 15446 | SV * const mysv=sv_newmortal(); |
| 15447 | DEBUG_PARSE_MSG((scan==p ? "tail" : "")); |
| 15448 | regprop(RExC_rx, mysv, scan, NULL); |
| 15449 | PerlIO_printf(Perl_debug_log, "~ %s (%d) %s %s\n", |
| 15450 | SvPV_nolen_const(mysv), REG_NODE_NUM(scan), |
| 15451 | (temp == NULL ? "->" : ""), |
| 15452 | (temp == NULL ? PL_reg_name[OP(val)] : "") |
| 15453 | ); |
| 15454 | }); |
| 15455 | if (temp == NULL) |
| 15456 | break; |
| 15457 | scan = temp; |
| 15458 | } |
| 15459 | |
| 15460 | if (reg_off_by_arg[OP(scan)]) { |
| 15461 | ARG_SET(scan, val - scan); |
| 15462 | } |
| 15463 | else { |
| 15464 | NEXT_OFF(scan) = val - scan; |
| 15465 | } |
| 15466 | } |
| 15467 | |
| 15468 | #ifdef DEBUGGING |
| 15469 | /* |
| 15470 | - regtail_study - set the next-pointer at the end of a node chain of p to val. |
| 15471 | - Look for optimizable sequences at the same time. |
| 15472 | - currently only looks for EXACT chains. |
| 15473 | |
| 15474 | This is experimental code. The idea is to use this routine to perform |
| 15475 | in place optimizations on branches and groups as they are constructed, |
| 15476 | with the long term intention of removing optimization from study_chunk so |
| 15477 | that it is purely analytical. |
| 15478 | |
| 15479 | Currently only used when in DEBUG mode. The macro REGTAIL_STUDY() is used |
| 15480 | to control which is which. |
| 15481 | |
| 15482 | */ |
| 15483 | /* TODO: All four parms should be const */ |
| 15484 | |
| 15485 | STATIC U8 |
| 15486 | S_regtail_study(pTHX_ RExC_state_t *pRExC_state, regnode *p, |
| 15487 | const regnode *val,U32 depth) |
| 15488 | { |
| 15489 | regnode *scan; |
| 15490 | U8 exact = PSEUDO; |
| 15491 | #ifdef EXPERIMENTAL_INPLACESCAN |
| 15492 | I32 min = 0; |
| 15493 | #endif |
| 15494 | GET_RE_DEBUG_FLAGS_DECL; |
| 15495 | |
| 15496 | PERL_ARGS_ASSERT_REGTAIL_STUDY; |
| 15497 | |
| 15498 | |
| 15499 | if (SIZE_ONLY) |
| 15500 | return exact; |
| 15501 | |
| 15502 | /* Find last node. */ |
| 15503 | |
| 15504 | scan = p; |
| 15505 | for (;;) { |
| 15506 | regnode * const temp = regnext(scan); |
| 15507 | #ifdef EXPERIMENTAL_INPLACESCAN |
| 15508 | if (PL_regkind[OP(scan)] == EXACT) { |
| 15509 | bool unfolded_multi_char; /* Unexamined in this routine */ |
| 15510 | if (join_exact(pRExC_state, scan, &min, |
| 15511 | &unfolded_multi_char, 1, val, depth+1)) |
| 15512 | return EXACT; |
| 15513 | } |
| 15514 | #endif |
| 15515 | if ( exact ) { |
| 15516 | switch (OP(scan)) { |
| 15517 | case EXACT: |
| 15518 | case EXACTF: |
| 15519 | case EXACTFA_NO_TRIE: |
| 15520 | case EXACTFA: |
| 15521 | case EXACTFU: |
| 15522 | case EXACTFU_SS: |
| 15523 | case EXACTFL: |
| 15524 | if( exact == PSEUDO ) |
| 15525 | exact= OP(scan); |
| 15526 | else if ( exact != OP(scan) ) |
| 15527 | exact= 0; |
| 15528 | case NOTHING: |
| 15529 | break; |
| 15530 | default: |
| 15531 | exact= 0; |
| 15532 | } |
| 15533 | } |
| 15534 | DEBUG_PARSE_r({ |
| 15535 | SV * const mysv=sv_newmortal(); |
| 15536 | DEBUG_PARSE_MSG((scan==p ? "tsdy" : "")); |
| 15537 | regprop(RExC_rx, mysv, scan, NULL); |
| 15538 | PerlIO_printf(Perl_debug_log, "~ %s (%d) -> %s\n", |
| 15539 | SvPV_nolen_const(mysv), |
| 15540 | REG_NODE_NUM(scan), |
| 15541 | PL_reg_name[exact]); |
| 15542 | }); |
| 15543 | if (temp == NULL) |
| 15544 | break; |
| 15545 | scan = temp; |
| 15546 | } |
| 15547 | DEBUG_PARSE_r({ |
| 15548 | SV * const mysv_val=sv_newmortal(); |
| 15549 | DEBUG_PARSE_MSG(""); |
| 15550 | regprop(RExC_rx, mysv_val, val, NULL); |
| 15551 | PerlIO_printf(Perl_debug_log, |
| 15552 | "~ attach to %s (%"IVdf") offset to %"IVdf"\n", |
| 15553 | SvPV_nolen_const(mysv_val), |
| 15554 | (IV)REG_NODE_NUM(val), |
| 15555 | (IV)(val - scan) |
| 15556 | ); |
| 15557 | }); |
| 15558 | if (reg_off_by_arg[OP(scan)]) { |
| 15559 | ARG_SET(scan, val - scan); |
| 15560 | } |
| 15561 | else { |
| 15562 | NEXT_OFF(scan) = val - scan; |
| 15563 | } |
| 15564 | |
| 15565 | return exact; |
| 15566 | } |
| 15567 | #endif |
| 15568 | |
| 15569 | /* |
| 15570 | - regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form |
| 15571 | */ |
| 15572 | #ifdef DEBUGGING |
| 15573 | |
| 15574 | static void |
| 15575 | S_regdump_intflags(pTHX_ const char *lead, const U32 flags) |
| 15576 | { |
| 15577 | int bit; |
| 15578 | int set=0; |
| 15579 | |
| 15580 | ASSUME(REG_INTFLAGS_NAME_SIZE <= sizeof(flags)*8); |
| 15581 | |
| 15582 | for (bit=0; bit<REG_INTFLAGS_NAME_SIZE; bit++) { |
| 15583 | if (flags & (1<<bit)) { |
| 15584 | if (!set++ && lead) |
| 15585 | PerlIO_printf(Perl_debug_log, "%s",lead); |
| 15586 | PerlIO_printf(Perl_debug_log, "%s ",PL_reg_intflags_name[bit]); |
| 15587 | } |
| 15588 | } |
| 15589 | if (lead) { |
| 15590 | if (set) |
| 15591 | PerlIO_printf(Perl_debug_log, "\n"); |
| 15592 | else |
| 15593 | PerlIO_printf(Perl_debug_log, "%s[none-set]\n",lead); |
| 15594 | } |
| 15595 | } |
| 15596 | |
| 15597 | static void |
| 15598 | S_regdump_extflags(pTHX_ const char *lead, const U32 flags) |
| 15599 | { |
| 15600 | int bit; |
| 15601 | int set=0; |
| 15602 | regex_charset cs; |
| 15603 | |
| 15604 | ASSUME(REG_EXTFLAGS_NAME_SIZE <= sizeof(flags)*8); |
| 15605 | |
| 15606 | for (bit=0; bit<REG_EXTFLAGS_NAME_SIZE; bit++) { |
| 15607 | if (flags & (1<<bit)) { |
| 15608 | if ((1<<bit) & RXf_PMf_CHARSET) { /* Output separately, below */ |
| 15609 | continue; |
| 15610 | } |
| 15611 | if (!set++ && lead) |
| 15612 | PerlIO_printf(Perl_debug_log, "%s",lead); |
| 15613 | PerlIO_printf(Perl_debug_log, "%s ",PL_reg_extflags_name[bit]); |
| 15614 | } |
| 15615 | } |
| 15616 | if ((cs = get_regex_charset(flags)) != REGEX_DEPENDS_CHARSET) { |
| 15617 | if (!set++ && lead) { |
| 15618 | PerlIO_printf(Perl_debug_log, "%s",lead); |
| 15619 | } |
| 15620 | switch (cs) { |
| 15621 | case REGEX_UNICODE_CHARSET: |
| 15622 | PerlIO_printf(Perl_debug_log, "UNICODE"); |
| 15623 | break; |
| 15624 | case REGEX_LOCALE_CHARSET: |
| 15625 | PerlIO_printf(Perl_debug_log, "LOCALE"); |
| 15626 | break; |
| 15627 | case REGEX_ASCII_RESTRICTED_CHARSET: |
| 15628 | PerlIO_printf(Perl_debug_log, "ASCII-RESTRICTED"); |
| 15629 | break; |
| 15630 | case REGEX_ASCII_MORE_RESTRICTED_CHARSET: |
| 15631 | PerlIO_printf(Perl_debug_log, "ASCII-MORE_RESTRICTED"); |
| 15632 | break; |
| 15633 | default: |
| 15634 | PerlIO_printf(Perl_debug_log, "UNKNOWN CHARACTER SET"); |
| 15635 | break; |
| 15636 | } |
| 15637 | } |
| 15638 | if (lead) { |
| 15639 | if (set) |
| 15640 | PerlIO_printf(Perl_debug_log, "\n"); |
| 15641 | else |
| 15642 | PerlIO_printf(Perl_debug_log, "%s[none-set]\n",lead); |
| 15643 | } |
| 15644 | } |
| 15645 | #endif |
| 15646 | |
| 15647 | void |
| 15648 | Perl_regdump(pTHX_ const regexp *r) |
| 15649 | { |
| 15650 | #ifdef DEBUGGING |
| 15651 | SV * const sv = sv_newmortal(); |
| 15652 | SV *dsv= sv_newmortal(); |
| 15653 | RXi_GET_DECL(r,ri); |
| 15654 | GET_RE_DEBUG_FLAGS_DECL; |
| 15655 | |
| 15656 | PERL_ARGS_ASSERT_REGDUMP; |
| 15657 | |
| 15658 | (void)dumpuntil(r, ri->program, ri->program + 1, NULL, NULL, sv, 0, 0); |
| 15659 | |
| 15660 | /* Header fields of interest. */ |
| 15661 | if (r->anchored_substr) { |
| 15662 | RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->anchored_substr), |
| 15663 | RE_SV_DUMPLEN(r->anchored_substr), 30); |
| 15664 | PerlIO_printf(Perl_debug_log, |
| 15665 | "anchored %s%s at %"IVdf" ", |
| 15666 | s, RE_SV_TAIL(r->anchored_substr), |
| 15667 | (IV)r->anchored_offset); |
| 15668 | } else if (r->anchored_utf8) { |
| 15669 | RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->anchored_utf8), |
| 15670 | RE_SV_DUMPLEN(r->anchored_utf8), 30); |
| 15671 | PerlIO_printf(Perl_debug_log, |
| 15672 | "anchored utf8 %s%s at %"IVdf" ", |
| 15673 | s, RE_SV_TAIL(r->anchored_utf8), |
| 15674 | (IV)r->anchored_offset); |
| 15675 | } |
| 15676 | if (r->float_substr) { |
| 15677 | RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->float_substr), |
| 15678 | RE_SV_DUMPLEN(r->float_substr), 30); |
| 15679 | PerlIO_printf(Perl_debug_log, |
| 15680 | "floating %s%s at %"IVdf"..%"UVuf" ", |
| 15681 | s, RE_SV_TAIL(r->float_substr), |
| 15682 | (IV)r->float_min_offset, (UV)r->float_max_offset); |
| 15683 | } else if (r->float_utf8) { |
| 15684 | RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->float_utf8), |
| 15685 | RE_SV_DUMPLEN(r->float_utf8), 30); |
| 15686 | PerlIO_printf(Perl_debug_log, |
| 15687 | "floating utf8 %s%s at %"IVdf"..%"UVuf" ", |
| 15688 | s, RE_SV_TAIL(r->float_utf8), |
| 15689 | (IV)r->float_min_offset, (UV)r->float_max_offset); |
| 15690 | } |
| 15691 | if (r->check_substr || r->check_utf8) |
| 15692 | PerlIO_printf(Perl_debug_log, |
| 15693 | (const char *) |
| 15694 | (r->check_substr == r->float_substr |
| 15695 | && r->check_utf8 == r->float_utf8 |
| 15696 | ? "(checking floating" : "(checking anchored")); |
| 15697 | if (r->intflags & PREGf_NOSCAN) |
| 15698 | PerlIO_printf(Perl_debug_log, " noscan"); |
| 15699 | if (r->extflags & RXf_CHECK_ALL) |
| 15700 | PerlIO_printf(Perl_debug_log, " isall"); |
| 15701 | if (r->check_substr || r->check_utf8) |
| 15702 | PerlIO_printf(Perl_debug_log, ") "); |
| 15703 | |
| 15704 | if (ri->regstclass) { |
| 15705 | regprop(r, sv, ri->regstclass, NULL); |
| 15706 | PerlIO_printf(Perl_debug_log, "stclass %s ", SvPVX_const(sv)); |
| 15707 | } |
| 15708 | if (r->intflags & PREGf_ANCH) { |
| 15709 | PerlIO_printf(Perl_debug_log, "anchored"); |
| 15710 | if (r->intflags & PREGf_ANCH_BOL) |
| 15711 | PerlIO_printf(Perl_debug_log, "(BOL)"); |
| 15712 | if (r->intflags & PREGf_ANCH_MBOL) |
| 15713 | PerlIO_printf(Perl_debug_log, "(MBOL)"); |
| 15714 | if (r->intflags & PREGf_ANCH_SBOL) |
| 15715 | PerlIO_printf(Perl_debug_log, "(SBOL)"); |
| 15716 | if (r->intflags & PREGf_ANCH_GPOS) |
| 15717 | PerlIO_printf(Perl_debug_log, "(GPOS)"); |
| 15718 | PerlIO_putc(Perl_debug_log, ' '); |
| 15719 | } |
| 15720 | if (r->intflags & PREGf_GPOS_SEEN) |
| 15721 | PerlIO_printf(Perl_debug_log, "GPOS:%"UVuf" ", (UV)r->gofs); |
| 15722 | if (r->intflags & PREGf_SKIP) |
| 15723 | PerlIO_printf(Perl_debug_log, "plus "); |
| 15724 | if (r->intflags & PREGf_IMPLICIT) |
| 15725 | PerlIO_printf(Perl_debug_log, "implicit "); |
| 15726 | PerlIO_printf(Perl_debug_log, "minlen %"IVdf" ", (IV)r->minlen); |
| 15727 | if (r->extflags & RXf_EVAL_SEEN) |
| 15728 | PerlIO_printf(Perl_debug_log, "with eval "); |
| 15729 | PerlIO_printf(Perl_debug_log, "\n"); |
| 15730 | DEBUG_FLAGS_r({ |
| 15731 | regdump_extflags("r->extflags: ",r->extflags); |
| 15732 | regdump_intflags("r->intflags: ",r->intflags); |
| 15733 | }); |
| 15734 | #else |
| 15735 | PERL_ARGS_ASSERT_REGDUMP; |
| 15736 | PERL_UNUSED_CONTEXT; |
| 15737 | PERL_UNUSED_ARG(r); |
| 15738 | #endif /* DEBUGGING */ |
| 15739 | } |
| 15740 | |
| 15741 | /* |
| 15742 | - regprop - printable representation of opcode, with run time support |
| 15743 | */ |
| 15744 | |
| 15745 | void |
| 15746 | Perl_regprop(pTHX_ const regexp *prog, SV *sv, const regnode *o, const regmatch_info *reginfo) |
| 15747 | { |
| 15748 | #ifdef DEBUGGING |
| 15749 | int k; |
| 15750 | |
| 15751 | /* Should be synchronized with * ANYOF_ #xdefines in regcomp.h */ |
| 15752 | static const char * const anyofs[] = { |
| 15753 | #if _CC_WORDCHAR != 0 || _CC_DIGIT != 1 || _CC_ALPHA != 2 || _CC_LOWER != 3 \ |
| 15754 | || _CC_UPPER != 4 || _CC_PUNCT != 5 || _CC_PRINT != 6 \ |
| 15755 | || _CC_ALPHANUMERIC != 7 || _CC_GRAPH != 8 || _CC_CASED != 9 \ |
| 15756 | || _CC_SPACE != 10 || _CC_BLANK != 11 || _CC_XDIGIT != 12 \ |
| 15757 | || _CC_PSXSPC != 13 || _CC_CNTRL != 14 || _CC_ASCII != 15 \ |
| 15758 | || _CC_VERTSPACE != 16 |
| 15759 | #error Need to adjust order of anyofs[] |
| 15760 | #endif |
| 15761 | "\\w", |
| 15762 | "\\W", |
| 15763 | "\\d", |
| 15764 | "\\D", |
| 15765 | "[:alpha:]", |
| 15766 | "[:^alpha:]", |
| 15767 | "[:lower:]", |
| 15768 | "[:^lower:]", |
| 15769 | "[:upper:]", |
| 15770 | "[:^upper:]", |
| 15771 | "[:punct:]", |
| 15772 | "[:^punct:]", |
| 15773 | "[:print:]", |
| 15774 | "[:^print:]", |
| 15775 | "[:alnum:]", |
| 15776 | "[:^alnum:]", |
| 15777 | "[:graph:]", |
| 15778 | "[:^graph:]", |
| 15779 | "[:cased:]", |
| 15780 | "[:^cased:]", |
| 15781 | "\\s", |
| 15782 | "\\S", |
| 15783 | "[:blank:]", |
| 15784 | "[:^blank:]", |
| 15785 | "[:xdigit:]", |
| 15786 | "[:^xdigit:]", |
| 15787 | "[:space:]", |
| 15788 | "[:^space:]", |
| 15789 | "[:cntrl:]", |
| 15790 | "[:^cntrl:]", |
| 15791 | "[:ascii:]", |
| 15792 | "[:^ascii:]", |
| 15793 | "\\v", |
| 15794 | "\\V" |
| 15795 | }; |
| 15796 | RXi_GET_DECL(prog,progi); |
| 15797 | GET_RE_DEBUG_FLAGS_DECL; |
| 15798 | |
| 15799 | PERL_ARGS_ASSERT_REGPROP; |
| 15800 | |
| 15801 | sv_setpvs(sv, ""); |
| 15802 | |
| 15803 | if (OP(o) > REGNODE_MAX) /* regnode.type is unsigned */ |
| 15804 | /* It would be nice to FAIL() here, but this may be called from |
| 15805 | regexec.c, and it would be hard to supply pRExC_state. */ |
| 15806 | Perl_croak(aTHX_ "Corrupted regexp opcode %d > %d", |
| 15807 | (int)OP(o), (int)REGNODE_MAX); |
| 15808 | sv_catpv(sv, PL_reg_name[OP(o)]); /* Take off const! */ |
| 15809 | |
| 15810 | k = PL_regkind[OP(o)]; |
| 15811 | |
| 15812 | if (k == EXACT) { |
| 15813 | sv_catpvs(sv, " "); |
| 15814 | /* Using is_utf8_string() (via PERL_PV_UNI_DETECT) |
| 15815 | * is a crude hack but it may be the best for now since |
| 15816 | * we have no flag "this EXACTish node was UTF-8" |
| 15817 | * --jhi */ |
| 15818 | pv_pretty(sv, STRING(o), STR_LEN(o), 60, PL_colors[0], PL_colors[1], |
| 15819 | PERL_PV_ESCAPE_UNI_DETECT | |
| 15820 | PERL_PV_ESCAPE_NONASCII | |
| 15821 | PERL_PV_PRETTY_ELLIPSES | |
| 15822 | PERL_PV_PRETTY_LTGT | |
| 15823 | PERL_PV_PRETTY_NOCLEAR |
| 15824 | ); |
| 15825 | } else if (k == TRIE) { |
| 15826 | /* print the details of the trie in dumpuntil instead, as |
| 15827 | * progi->data isn't available here */ |
| 15828 | const char op = OP(o); |
| 15829 | const U32 n = ARG(o); |
| 15830 | const reg_ac_data * const ac = IS_TRIE_AC(op) ? |
| 15831 | (reg_ac_data *)progi->data->data[n] : |
| 15832 | NULL; |
| 15833 | const reg_trie_data * const trie |
| 15834 | = (reg_trie_data*)progi->data->data[!IS_TRIE_AC(op) ? n : ac->trie]; |
| 15835 | |
| 15836 | Perl_sv_catpvf(aTHX_ sv, "-%s",PL_reg_name[o->flags]); |
| 15837 | DEBUG_TRIE_COMPILE_r( |
| 15838 | Perl_sv_catpvf(aTHX_ sv, |
| 15839 | "<S:%"UVuf"/%"IVdf" W:%"UVuf" L:%"UVuf"/%"UVuf" C:%"UVuf"/%"UVuf">", |
| 15840 | (UV)trie->startstate, |
| 15841 | (IV)trie->statecount-1, /* -1 because of the unused 0 element */ |
| 15842 | (UV)trie->wordcount, |
| 15843 | (UV)trie->minlen, |
| 15844 | (UV)trie->maxlen, |
| 15845 | (UV)TRIE_CHARCOUNT(trie), |
| 15846 | (UV)trie->uniquecharcount |
| 15847 | ); |
| 15848 | ); |
| 15849 | if ( IS_ANYOF_TRIE(op) || trie->bitmap ) { |
| 15850 | sv_catpvs(sv, "["); |
| 15851 | (void) put_charclass_bitmap_innards(sv, |
| 15852 | (IS_ANYOF_TRIE(op)) |
| 15853 | ? ANYOF_BITMAP(o) |
| 15854 | : TRIE_BITMAP(trie), |
| 15855 | NULL); |
| 15856 | sv_catpvs(sv, "]"); |
| 15857 | } |
| 15858 | |
| 15859 | } else if (k == CURLY) { |
| 15860 | if (OP(o) == CURLYM || OP(o) == CURLYN || OP(o) == CURLYX) |
| 15861 | Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */ |
| 15862 | Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o)); |
| 15863 | } |
| 15864 | else if (k == WHILEM && o->flags) /* Ordinal/of */ |
| 15865 | Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4); |
| 15866 | else if (k == REF || k == OPEN || k == CLOSE |
| 15867 | || k == GROUPP || OP(o)==ACCEPT) |
| 15868 | { |
| 15869 | Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */ |
| 15870 | if ( RXp_PAREN_NAMES(prog) ) { |
| 15871 | if ( k != REF || (OP(o) < NREF)) { |
| 15872 | AV *list= MUTABLE_AV(progi->data->data[progi->name_list_idx]); |
| 15873 | SV **name= av_fetch(list, ARG(o), 0 ); |
| 15874 | if (name) |
| 15875 | Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name)); |
| 15876 | } |
| 15877 | else { |
| 15878 | AV *list= MUTABLE_AV(progi->data->data[ progi->name_list_idx ]); |
| 15879 | SV *sv_dat= MUTABLE_SV(progi->data->data[ ARG( o ) ]); |
| 15880 | I32 *nums=(I32*)SvPVX(sv_dat); |
| 15881 | SV **name= av_fetch(list, nums[0], 0 ); |
| 15882 | I32 n; |
| 15883 | if (name) { |
| 15884 | for ( n=0; n<SvIVX(sv_dat); n++ ) { |
| 15885 | Perl_sv_catpvf(aTHX_ sv, "%s%"IVdf, |
| 15886 | (n ? "," : ""), (IV)nums[n]); |
| 15887 | } |
| 15888 | Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name)); |
| 15889 | } |
| 15890 | } |
| 15891 | } |
| 15892 | if ( k == REF && reginfo) { |
| 15893 | U32 n = ARG(o); /* which paren pair */ |
| 15894 | I32 ln = prog->offs[n].start; |
| 15895 | if (prog->lastparen < n || ln == -1) |
| 15896 | Perl_sv_catpvf(aTHX_ sv, ": FAIL"); |
| 15897 | else if (ln == prog->offs[n].end) |
| 15898 | Perl_sv_catpvf(aTHX_ sv, ": ACCEPT - EMPTY STRING"); |
| 15899 | else { |
| 15900 | const char *s = reginfo->strbeg + ln; |
| 15901 | Perl_sv_catpvf(aTHX_ sv, ": "); |
| 15902 | Perl_pv_pretty( aTHX_ sv, s, prog->offs[n].end - prog->offs[n].start, 32, 0, 0, |
| 15903 | PERL_PV_ESCAPE_UNI_DETECT|PERL_PV_PRETTY_NOCLEAR|PERL_PV_PRETTY_ELLIPSES|PERL_PV_PRETTY_QUOTE ); |
| 15904 | } |
| 15905 | } |
| 15906 | } else if (k == GOSUB) |
| 15907 | /* Paren and offset */ |
| 15908 | Perl_sv_catpvf(aTHX_ sv, "%d[%+d]", (int)ARG(o),(int)ARG2L(o)); |
| 15909 | else if (k == VERB) { |
| 15910 | if (!o->flags) |
| 15911 | Perl_sv_catpvf(aTHX_ sv, ":%"SVf, |
| 15912 | SVfARG((MUTABLE_SV(progi->data->data[ ARG( o ) ])))); |
| 15913 | } else if (k == LOGICAL) |
| 15914 | /* 2: embedded, otherwise 1 */ |
| 15915 | Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); |
| 15916 | else if (k == ANYOF) { |
| 15917 | const U8 flags = ANYOF_FLAGS(o); |
| 15918 | int do_sep = 0; |
| 15919 | SV* bitmap_invlist; /* Will hold what the bit map contains */ |
| 15920 | |
| 15921 | |
| 15922 | if (flags & ANYOF_LOCALE_FLAGS) |
| 15923 | sv_catpvs(sv, "{loc}"); |
| 15924 | if (flags & ANYOF_LOC_FOLD) |
| 15925 | sv_catpvs(sv, "{i}"); |
| 15926 | Perl_sv_catpvf(aTHX_ sv, "[%s", PL_colors[0]); |
| 15927 | if (flags & ANYOF_INVERT) |
| 15928 | sv_catpvs(sv, "^"); |
| 15929 | |
| 15930 | /* output what the standard cp 0-NUM_ANYOF_CODE_POINTS-1 bitmap matches |
| 15931 | * */ |
| 15932 | do_sep = put_charclass_bitmap_innards(sv, ANYOF_BITMAP(o), |
| 15933 | &bitmap_invlist); |
| 15934 | |
| 15935 | /* output any special charclass tests (used entirely under use |
| 15936 | * locale) * */ |
| 15937 | if (ANYOF_POSIXL_TEST_ANY_SET(o)) { |
| 15938 | int i; |
| 15939 | for (i = 0; i < ANYOF_POSIXL_MAX; i++) { |
| 15940 | if (ANYOF_POSIXL_TEST(o,i)) { |
| 15941 | sv_catpv(sv, anyofs[i]); |
| 15942 | do_sep = 1; |
| 15943 | } |
| 15944 | } |
| 15945 | } |
| 15946 | |
| 15947 | if ((flags & (ANYOF_ABOVE_LATIN1_ALL |
| 15948 | |ANYOF_UTF8 |
| 15949 | |ANYOF_NONBITMAP_NON_UTF8 |
| 15950 | |ANYOF_LOC_FOLD))) |
| 15951 | { |
| 15952 | if (do_sep) { |
| 15953 | Perl_sv_catpvf(aTHX_ sv,"%s][%s",PL_colors[1],PL_colors[0]); |
| 15954 | if (flags & ANYOF_INVERT) |
| 15955 | /*make sure the invert info is in each */ |
| 15956 | sv_catpvs(sv, "^"); |
| 15957 | } |
| 15958 | |
| 15959 | if (flags & ANYOF_NON_UTF8_NON_ASCII_ALL) { |
| 15960 | sv_catpvs(sv, "{non-utf8-latin1-all}"); |
| 15961 | } |
| 15962 | |
| 15963 | /* output information about the unicode matching */ |
| 15964 | if (flags & ANYOF_ABOVE_LATIN1_ALL) |
| 15965 | sv_catpvs(sv, "{unicode_all}"); |
| 15966 | else if (ARG(o) != ANYOF_NONBITMAP_EMPTY) { |
| 15967 | SV *lv; /* Set if there is something outside the bit map. */ |
| 15968 | bool byte_output = FALSE; /* If something in the bitmap has |
| 15969 | been output */ |
| 15970 | SV *only_utf8_locale; |
| 15971 | |
| 15972 | /* Get the stuff that wasn't in the bitmap. 'bitmap_invlist' |
| 15973 | * is used to guarantee that nothing in the bitmap gets |
| 15974 | * returned */ |
| 15975 | (void) _get_regclass_nonbitmap_data(prog, o, FALSE, |
| 15976 | &lv, &only_utf8_locale, |
| 15977 | bitmap_invlist); |
| 15978 | if (lv && lv != &PL_sv_undef) { |
| 15979 | char *s = savesvpv(lv); |
| 15980 | char * const origs = s; |
| 15981 | |
| 15982 | while (*s && *s != '\n') |
| 15983 | s++; |
| 15984 | |
| 15985 | if (*s == '\n') { |
| 15986 | const char * const t = ++s; |
| 15987 | |
| 15988 | if (flags & ANYOF_NONBITMAP_NON_UTF8) { |
| 15989 | sv_catpvs(sv, "{outside bitmap}"); |
| 15990 | } |
| 15991 | else { |
| 15992 | sv_catpvs(sv, "{utf8}"); |
| 15993 | } |
| 15994 | |
| 15995 | if (byte_output) { |
| 15996 | sv_catpvs(sv, " "); |
| 15997 | } |
| 15998 | |
| 15999 | while (*s) { |
| 16000 | if (*s == '\n') { |
| 16001 | |
| 16002 | /* Truncate very long output */ |
| 16003 | if (s - origs > 256) { |
| 16004 | Perl_sv_catpvf(aTHX_ sv, |
| 16005 | "%.*s...", |
| 16006 | (int) (s - origs - 1), |
| 16007 | t); |
| 16008 | goto out_dump; |
| 16009 | } |
| 16010 | *s = ' '; |
| 16011 | } |
| 16012 | else if (*s == '\t') { |
| 16013 | *s = '-'; |
| 16014 | } |
| 16015 | s++; |
| 16016 | } |
| 16017 | if (s[-1] == ' ') |
| 16018 | s[-1] = 0; |
| 16019 | |
| 16020 | sv_catpv(sv, t); |
| 16021 | } |
| 16022 | |
| 16023 | out_dump: |
| 16024 | |
| 16025 | Safefree(origs); |
| 16026 | SvREFCNT_dec_NN(lv); |
| 16027 | } |
| 16028 | |
| 16029 | if ((flags & ANYOF_LOC_FOLD) |
| 16030 | && only_utf8_locale |
| 16031 | && only_utf8_locale != &PL_sv_undef) |
| 16032 | { |
| 16033 | UV start, end; |
| 16034 | int max_entries = 256; |
| 16035 | |
| 16036 | sv_catpvs(sv, "{utf8 locale}"); |
| 16037 | invlist_iterinit(only_utf8_locale); |
| 16038 | while (invlist_iternext(only_utf8_locale, |
| 16039 | &start, &end)) { |
| 16040 | put_range(sv, start, end, FALSE); |
| 16041 | max_entries --; |
| 16042 | if (max_entries < 0) { |
| 16043 | sv_catpvs(sv, "..."); |
| 16044 | break; |
| 16045 | } |
| 16046 | } |
| 16047 | invlist_iterfinish(only_utf8_locale); |
| 16048 | } |
| 16049 | } |
| 16050 | } |
| 16051 | SvREFCNT_dec(bitmap_invlist); |
| 16052 | |
| 16053 | |
| 16054 | Perl_sv_catpvf(aTHX_ sv, "%s]", PL_colors[1]); |
| 16055 | } |
| 16056 | else if (k == POSIXD || k == NPOSIXD) { |
| 16057 | U8 index = FLAGS(o) * 2; |
| 16058 | if (index < C_ARRAY_LENGTH(anyofs)) { |
| 16059 | if (*anyofs[index] != '[') { |
| 16060 | sv_catpv(sv, "["); |
| 16061 | } |
| 16062 | sv_catpv(sv, anyofs[index]); |
| 16063 | if (*anyofs[index] != '[') { |
| 16064 | sv_catpv(sv, "]"); |
| 16065 | } |
| 16066 | } |
| 16067 | else { |
| 16068 | Perl_sv_catpvf(aTHX_ sv, "[illegal type=%d])", index); |
| 16069 | } |
| 16070 | } |
| 16071 | else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH)) |
| 16072 | Perl_sv_catpvf(aTHX_ sv, "[%d]", -(o->flags)); |
| 16073 | #else |
| 16074 | PERL_UNUSED_CONTEXT; |
| 16075 | PERL_UNUSED_ARG(sv); |
| 16076 | PERL_UNUSED_ARG(o); |
| 16077 | PERL_UNUSED_ARG(prog); |
| 16078 | PERL_UNUSED_ARG(reginfo); |
| 16079 | #endif /* DEBUGGING */ |
| 16080 | } |
| 16081 | |
| 16082 | |
| 16083 | |
| 16084 | SV * |
| 16085 | Perl_re_intuit_string(pTHX_ REGEXP * const r) |
| 16086 | { /* Assume that RE_INTUIT is set */ |
| 16087 | struct regexp *const prog = ReANY(r); |
| 16088 | GET_RE_DEBUG_FLAGS_DECL; |
| 16089 | |
| 16090 | PERL_ARGS_ASSERT_RE_INTUIT_STRING; |
| 16091 | PERL_UNUSED_CONTEXT; |
| 16092 | |
| 16093 | DEBUG_COMPILE_r( |
| 16094 | { |
| 16095 | const char * const s = SvPV_nolen_const(prog->check_substr |
| 16096 | ? prog->check_substr : prog->check_utf8); |
| 16097 | |
| 16098 | if (!PL_colorset) reginitcolors(); |
| 16099 | PerlIO_printf(Perl_debug_log, |
| 16100 | "%sUsing REx %ssubstr:%s \"%s%.60s%s%s\"\n", |
| 16101 | PL_colors[4], |
| 16102 | prog->check_substr ? "" : "utf8 ", |
| 16103 | PL_colors[5],PL_colors[0], |
| 16104 | s, |
| 16105 | PL_colors[1], |
| 16106 | (strlen(s) > 60 ? "..." : "")); |
| 16107 | } ); |
| 16108 | |
| 16109 | return prog->check_substr ? prog->check_substr : prog->check_utf8; |
| 16110 | } |
| 16111 | |
| 16112 | /* |
| 16113 | pregfree() |
| 16114 | |
| 16115 | handles refcounting and freeing the perl core regexp structure. When |
| 16116 | it is necessary to actually free the structure the first thing it |
| 16117 | does is call the 'free' method of the regexp_engine associated to |
| 16118 | the regexp, allowing the handling of the void *pprivate; member |
| 16119 | first. (This routine is not overridable by extensions, which is why |
| 16120 | the extensions free is called first.) |
| 16121 | |
| 16122 | See regdupe and regdupe_internal if you change anything here. |
| 16123 | */ |
| 16124 | #ifndef PERL_IN_XSUB_RE |
| 16125 | void |
| 16126 | Perl_pregfree(pTHX_ REGEXP *r) |
| 16127 | { |
| 16128 | SvREFCNT_dec(r); |
| 16129 | } |
| 16130 | |
| 16131 | void |
| 16132 | Perl_pregfree2(pTHX_ REGEXP *rx) |
| 16133 | { |
| 16134 | struct regexp *const r = ReANY(rx); |
| 16135 | GET_RE_DEBUG_FLAGS_DECL; |
| 16136 | |
| 16137 | PERL_ARGS_ASSERT_PREGFREE2; |
| 16138 | |
| 16139 | if (r->mother_re) { |
| 16140 | ReREFCNT_dec(r->mother_re); |
| 16141 | } else { |
| 16142 | CALLREGFREE_PVT(rx); /* free the private data */ |
| 16143 | SvREFCNT_dec(RXp_PAREN_NAMES(r)); |
| 16144 | Safefree(r->xpv_len_u.xpvlenu_pv); |
| 16145 | } |
| 16146 | if (r->substrs) { |
| 16147 | SvREFCNT_dec(r->anchored_substr); |
| 16148 | SvREFCNT_dec(r->anchored_utf8); |
| 16149 | SvREFCNT_dec(r->float_substr); |
| 16150 | SvREFCNT_dec(r->float_utf8); |
| 16151 | Safefree(r->substrs); |
| 16152 | } |
| 16153 | RX_MATCH_COPY_FREE(rx); |
| 16154 | #ifdef PERL_ANY_COW |
| 16155 | SvREFCNT_dec(r->saved_copy); |
| 16156 | #endif |
| 16157 | Safefree(r->offs); |
| 16158 | SvREFCNT_dec(r->qr_anoncv); |
| 16159 | rx->sv_u.svu_rx = 0; |
| 16160 | } |
| 16161 | |
| 16162 | /* reg_temp_copy() |
| 16163 | |
| 16164 | This is a hacky workaround to the structural issue of match results |
| 16165 | being stored in the regexp structure which is in turn stored in |
| 16166 | PL_curpm/PL_reg_curpm. The problem is that due to qr// the pattern |
| 16167 | could be PL_curpm in multiple contexts, and could require multiple |
| 16168 | result sets being associated with the pattern simultaneously, such |
| 16169 | as when doing a recursive match with (??{$qr}) |
| 16170 | |
| 16171 | The solution is to make a lightweight copy of the regexp structure |
| 16172 | when a qr// is returned from the code executed by (??{$qr}) this |
| 16173 | lightweight copy doesn't actually own any of its data except for |
| 16174 | the starp/end and the actual regexp structure itself. |
| 16175 | |
| 16176 | */ |
| 16177 | |
| 16178 | |
| 16179 | REGEXP * |
| 16180 | Perl_reg_temp_copy (pTHX_ REGEXP *ret_x, REGEXP *rx) |
| 16181 | { |
| 16182 | struct regexp *ret; |
| 16183 | struct regexp *const r = ReANY(rx); |
| 16184 | const bool islv = ret_x && SvTYPE(ret_x) == SVt_PVLV; |
| 16185 | |
| 16186 | PERL_ARGS_ASSERT_REG_TEMP_COPY; |
| 16187 | |
| 16188 | if (!ret_x) |
| 16189 | ret_x = (REGEXP*) newSV_type(SVt_REGEXP); |
| 16190 | else { |
| 16191 | SvOK_off((SV *)ret_x); |
| 16192 | if (islv) { |
| 16193 | /* For PVLVs, SvANY points to the xpvlv body while sv_u points |
| 16194 | to the regexp. (For SVt_REGEXPs, sv_upgrade has already |
| 16195 | made both spots point to the same regexp body.) */ |
| 16196 | REGEXP *temp = (REGEXP *)newSV_type(SVt_REGEXP); |
| 16197 | assert(!SvPVX(ret_x)); |
| 16198 | ret_x->sv_u.svu_rx = temp->sv_any; |
| 16199 | temp->sv_any = NULL; |
| 16200 | SvFLAGS(temp) = (SvFLAGS(temp) & ~SVTYPEMASK) | SVt_NULL; |
| 16201 | SvREFCNT_dec_NN(temp); |
| 16202 | /* SvCUR still resides in the xpvlv struct, so the regexp copy- |
| 16203 | ing below will not set it. */ |
| 16204 | SvCUR_set(ret_x, SvCUR(rx)); |
| 16205 | } |
| 16206 | } |
| 16207 | /* This ensures that SvTHINKFIRST(sv) is true, and hence that |
| 16208 | sv_force_normal(sv) is called. */ |
| 16209 | SvFAKE_on(ret_x); |
| 16210 | ret = ReANY(ret_x); |
| 16211 | |
| 16212 | SvFLAGS(ret_x) |= SvUTF8(rx); |
| 16213 | /* We share the same string buffer as the original regexp, on which we |
| 16214 | hold a reference count, incremented when mother_re is set below. |
| 16215 | The string pointer is copied here, being part of the regexp struct. |
| 16216 | */ |
| 16217 | memcpy(&(ret->xpv_cur), &(r->xpv_cur), |
| 16218 | sizeof(regexp) - STRUCT_OFFSET(regexp, xpv_cur)); |
| 16219 | if (r->offs) { |
| 16220 | const I32 npar = r->nparens+1; |
| 16221 | Newx(ret->offs, npar, regexp_paren_pair); |
| 16222 | Copy(r->offs, ret->offs, npar, regexp_paren_pair); |
| 16223 | } |
| 16224 | if (r->substrs) { |
| 16225 | Newx(ret->substrs, 1, struct reg_substr_data); |
| 16226 | StructCopy(r->substrs, ret->substrs, struct reg_substr_data); |
| 16227 | |
| 16228 | SvREFCNT_inc_void(ret->anchored_substr); |
| 16229 | SvREFCNT_inc_void(ret->anchored_utf8); |
| 16230 | SvREFCNT_inc_void(ret->float_substr); |
| 16231 | SvREFCNT_inc_void(ret->float_utf8); |
| 16232 | |
| 16233 | /* check_substr and check_utf8, if non-NULL, point to either their |
| 16234 | anchored or float namesakes, and don't hold a second reference. */ |
| 16235 | } |
| 16236 | RX_MATCH_COPIED_off(ret_x); |
| 16237 | #ifdef PERL_ANY_COW |
| 16238 | ret->saved_copy = NULL; |
| 16239 | #endif |
| 16240 | ret->mother_re = ReREFCNT_inc(r->mother_re ? r->mother_re : rx); |
| 16241 | SvREFCNT_inc_void(ret->qr_anoncv); |
| 16242 | |
| 16243 | return ret_x; |
| 16244 | } |
| 16245 | #endif |
| 16246 | |
| 16247 | /* regfree_internal() |
| 16248 | |
| 16249 | Free the private data in a regexp. This is overloadable by |
| 16250 | extensions. Perl takes care of the regexp structure in pregfree(), |
| 16251 | this covers the *pprivate pointer which technically perl doesn't |
| 16252 | know about, however of course we have to handle the |
| 16253 | regexp_internal structure when no extension is in use. |
| 16254 | |
| 16255 | Note this is called before freeing anything in the regexp |
| 16256 | structure. |
| 16257 | */ |
| 16258 | |
| 16259 | void |
| 16260 | Perl_regfree_internal(pTHX_ REGEXP * const rx) |
| 16261 | { |
| 16262 | struct regexp *const r = ReANY(rx); |
| 16263 | RXi_GET_DECL(r,ri); |
| 16264 | GET_RE_DEBUG_FLAGS_DECL; |
| 16265 | |
| 16266 | PERL_ARGS_ASSERT_REGFREE_INTERNAL; |
| 16267 | |
| 16268 | DEBUG_COMPILE_r({ |
| 16269 | if (!PL_colorset) |
| 16270 | reginitcolors(); |
| 16271 | { |
| 16272 | SV *dsv= sv_newmortal(); |
| 16273 | RE_PV_QUOTED_DECL(s, RX_UTF8(rx), |
| 16274 | dsv, RX_PRECOMP(rx), RX_PRELEN(rx), 60); |
| 16275 | PerlIO_printf(Perl_debug_log,"%sFreeing REx:%s %s\n", |
| 16276 | PL_colors[4],PL_colors[5],s); |
| 16277 | } |
| 16278 | }); |
| 16279 | #ifdef RE_TRACK_PATTERN_OFFSETS |
| 16280 | if (ri->u.offsets) |
| 16281 | Safefree(ri->u.offsets); /* 20010421 MJD */ |
| 16282 | #endif |
| 16283 | if (ri->code_blocks) { |
| 16284 | int n; |
| 16285 | for (n = 0; n < ri->num_code_blocks; n++) |
| 16286 | SvREFCNT_dec(ri->code_blocks[n].src_regex); |
| 16287 | Safefree(ri->code_blocks); |
| 16288 | } |
| 16289 | |
| 16290 | if (ri->data) { |
| 16291 | int n = ri->data->count; |
| 16292 | |
| 16293 | while (--n >= 0) { |
| 16294 | /* If you add a ->what type here, update the comment in regcomp.h */ |
| 16295 | switch (ri->data->what[n]) { |
| 16296 | case 'a': |
| 16297 | case 'r': |
| 16298 | case 's': |
| 16299 | case 'S': |
| 16300 | case 'u': |
| 16301 | SvREFCNT_dec(MUTABLE_SV(ri->data->data[n])); |
| 16302 | break; |
| 16303 | case 'f': |
| 16304 | Safefree(ri->data->data[n]); |
| 16305 | break; |
| 16306 | case 'l': |
| 16307 | case 'L': |
| 16308 | break; |
| 16309 | case 'T': |
| 16310 | { /* Aho Corasick add-on structure for a trie node. |
| 16311 | Used in stclass optimization only */ |
| 16312 | U32 refcount; |
| 16313 | reg_ac_data *aho=(reg_ac_data*)ri->data->data[n]; |
| 16314 | #ifdef USE_ITHREADS |
| 16315 | dVAR; |
| 16316 | #endif |
| 16317 | OP_REFCNT_LOCK; |
| 16318 | refcount = --aho->refcount; |
| 16319 | OP_REFCNT_UNLOCK; |
| 16320 | if ( !refcount ) { |
| 16321 | PerlMemShared_free(aho->states); |
| 16322 | PerlMemShared_free(aho->fail); |
| 16323 | /* do this last!!!! */ |
| 16324 | PerlMemShared_free(ri->data->data[n]); |
| 16325 | /* we should only ever get called once, so |
| 16326 | * assert as much, and also guard the free |
| 16327 | * which /might/ happen twice. At the least |
| 16328 | * it will make code anlyzers happy and it |
| 16329 | * doesn't cost much. - Yves */ |
| 16330 | assert(ri->regstclass); |
| 16331 | if (ri->regstclass) { |
| 16332 | PerlMemShared_free(ri->regstclass); |
| 16333 | ri->regstclass = 0; |
| 16334 | } |
| 16335 | } |
| 16336 | } |
| 16337 | break; |
| 16338 | case 't': |
| 16339 | { |
| 16340 | /* trie structure. */ |
| 16341 | U32 refcount; |
| 16342 | reg_trie_data *trie=(reg_trie_data*)ri->data->data[n]; |
| 16343 | #ifdef USE_ITHREADS |
| 16344 | dVAR; |
| 16345 | #endif |
| 16346 | OP_REFCNT_LOCK; |
| 16347 | refcount = --trie->refcount; |
| 16348 | OP_REFCNT_UNLOCK; |
| 16349 | if ( !refcount ) { |
| 16350 | PerlMemShared_free(trie->charmap); |
| 16351 | PerlMemShared_free(trie->states); |
| 16352 | PerlMemShared_free(trie->trans); |
| 16353 | if (trie->bitmap) |
| 16354 | PerlMemShared_free(trie->bitmap); |
| 16355 | if (trie->jump) |
| 16356 | PerlMemShared_free(trie->jump); |
| 16357 | PerlMemShared_free(trie->wordinfo); |
| 16358 | /* do this last!!!! */ |
| 16359 | PerlMemShared_free(ri->data->data[n]); |
| 16360 | } |
| 16361 | } |
| 16362 | break; |
| 16363 | default: |
| 16364 | Perl_croak(aTHX_ "panic: regfree data code '%c'", |
| 16365 | ri->data->what[n]); |
| 16366 | } |
| 16367 | } |
| 16368 | Safefree(ri->data->what); |
| 16369 | Safefree(ri->data); |
| 16370 | } |
| 16371 | |
| 16372 | Safefree(ri); |
| 16373 | } |
| 16374 | |
| 16375 | #define av_dup_inc(s,t) MUTABLE_AV(sv_dup_inc((const SV *)s,t)) |
| 16376 | #define hv_dup_inc(s,t) MUTABLE_HV(sv_dup_inc((const SV *)s,t)) |
| 16377 | #define SAVEPVN(p,n) ((p) ? savepvn(p,n) : NULL) |
| 16378 | |
| 16379 | /* |
| 16380 | re_dup - duplicate a regexp. |
| 16381 | |
| 16382 | This routine is expected to clone a given regexp structure. It is only |
| 16383 | compiled under USE_ITHREADS. |
| 16384 | |
| 16385 | After all of the core data stored in struct regexp is duplicated |
| 16386 | the regexp_engine.dupe method is used to copy any private data |
| 16387 | stored in the *pprivate pointer. This allows extensions to handle |
| 16388 | any duplication it needs to do. |
| 16389 | |
| 16390 | See pregfree() and regfree_internal() if you change anything here. |
| 16391 | */ |
| 16392 | #if defined(USE_ITHREADS) |
| 16393 | #ifndef PERL_IN_XSUB_RE |
| 16394 | void |
| 16395 | Perl_re_dup_guts(pTHX_ const REGEXP *sstr, REGEXP *dstr, CLONE_PARAMS *param) |
| 16396 | { |
| 16397 | dVAR; |
| 16398 | I32 npar; |
| 16399 | const struct regexp *r = ReANY(sstr); |
| 16400 | struct regexp *ret = ReANY(dstr); |
| 16401 | |
| 16402 | PERL_ARGS_ASSERT_RE_DUP_GUTS; |
| 16403 | |
| 16404 | npar = r->nparens+1; |
| 16405 | Newx(ret->offs, npar, regexp_paren_pair); |
| 16406 | Copy(r->offs, ret->offs, npar, regexp_paren_pair); |
| 16407 | |
| 16408 | if (ret->substrs) { |
| 16409 | /* Do it this way to avoid reading from *r after the StructCopy(). |
| 16410 | That way, if any of the sv_dup_inc()s dislodge *r from the L1 |
| 16411 | cache, it doesn't matter. */ |
| 16412 | const bool anchored = r->check_substr |
| 16413 | ? r->check_substr == r->anchored_substr |
| 16414 | : r->check_utf8 == r->anchored_utf8; |
| 16415 | Newx(ret->substrs, 1, struct reg_substr_data); |
| 16416 | StructCopy(r->substrs, ret->substrs, struct reg_substr_data); |
| 16417 | |
| 16418 | ret->anchored_substr = sv_dup_inc(ret->anchored_substr, param); |
| 16419 | ret->anchored_utf8 = sv_dup_inc(ret->anchored_utf8, param); |
| 16420 | ret->float_substr = sv_dup_inc(ret->float_substr, param); |
| 16421 | ret->float_utf8 = sv_dup_inc(ret->float_utf8, param); |
| 16422 | |
| 16423 | /* check_substr and check_utf8, if non-NULL, point to either their |
| 16424 | anchored or float namesakes, and don't hold a second reference. */ |
| 16425 | |
| 16426 | if (ret->check_substr) { |
| 16427 | if (anchored) { |
| 16428 | assert(r->check_utf8 == r->anchored_utf8); |
| 16429 | ret->check_substr = ret->anchored_substr; |
| 16430 | ret->check_utf8 = ret->anchored_utf8; |
| 16431 | } else { |
| 16432 | assert(r->check_substr == r->float_substr); |
| 16433 | assert(r->check_utf8 == r->float_utf8); |
| 16434 | ret->check_substr = ret->float_substr; |
| 16435 | ret->check_utf8 = ret->float_utf8; |
| 16436 | } |
| 16437 | } else if (ret->check_utf8) { |
| 16438 | if (anchored) { |
| 16439 | ret->check_utf8 = ret->anchored_utf8; |
| 16440 | } else { |
| 16441 | ret->check_utf8 = ret->float_utf8; |
| 16442 | } |
| 16443 | } |
| 16444 | } |
| 16445 | |
| 16446 | RXp_PAREN_NAMES(ret) = hv_dup_inc(RXp_PAREN_NAMES(ret), param); |
| 16447 | ret->qr_anoncv = MUTABLE_CV(sv_dup_inc((const SV *)ret->qr_anoncv, param)); |
| 16448 | |
| 16449 | if (ret->pprivate) |
| 16450 | RXi_SET(ret,CALLREGDUPE_PVT(dstr,param)); |
| 16451 | |
| 16452 | if (RX_MATCH_COPIED(dstr)) |
| 16453 | ret->subbeg = SAVEPVN(ret->subbeg, ret->sublen); |
| 16454 | else |
| 16455 | ret->subbeg = NULL; |
| 16456 | #ifdef PERL_ANY_COW |
| 16457 | ret->saved_copy = NULL; |
| 16458 | #endif |
| 16459 | |
| 16460 | /* Whether mother_re be set or no, we need to copy the string. We |
| 16461 | cannot refrain from copying it when the storage points directly to |
| 16462 | our mother regexp, because that's |
| 16463 | 1: a buffer in a different thread |
| 16464 | 2: something we no longer hold a reference on |
| 16465 | so we need to copy it locally. */ |
| 16466 | RX_WRAPPED(dstr) = SAVEPVN(RX_WRAPPED(sstr), SvCUR(sstr)+1); |
| 16467 | ret->mother_re = NULL; |
| 16468 | } |
| 16469 | #endif /* PERL_IN_XSUB_RE */ |
| 16470 | |
| 16471 | /* |
| 16472 | regdupe_internal() |
| 16473 | |
| 16474 | This is the internal complement to regdupe() which is used to copy |
| 16475 | the structure pointed to by the *pprivate pointer in the regexp. |
| 16476 | This is the core version of the extension overridable cloning hook. |
| 16477 | The regexp structure being duplicated will be copied by perl prior |
| 16478 | to this and will be provided as the regexp *r argument, however |
| 16479 | with the /old/ structures pprivate pointer value. Thus this routine |
| 16480 | may override any copying normally done by perl. |
| 16481 | |
| 16482 | It returns a pointer to the new regexp_internal structure. |
| 16483 | */ |
| 16484 | |
| 16485 | void * |
| 16486 | Perl_regdupe_internal(pTHX_ REGEXP * const rx, CLONE_PARAMS *param) |
| 16487 | { |
| 16488 | dVAR; |
| 16489 | struct regexp *const r = ReANY(rx); |
| 16490 | regexp_internal *reti; |
| 16491 | int len; |
| 16492 | RXi_GET_DECL(r,ri); |
| 16493 | |
| 16494 | PERL_ARGS_ASSERT_REGDUPE_INTERNAL; |
| 16495 | |
| 16496 | len = ProgLen(ri); |
| 16497 | |
| 16498 | Newxc(reti, sizeof(regexp_internal) + len*sizeof(regnode), |
| 16499 | char, regexp_internal); |
| 16500 | Copy(ri->program, reti->program, len+1, regnode); |
| 16501 | |
| 16502 | reti->num_code_blocks = ri->num_code_blocks; |
| 16503 | if (ri->code_blocks) { |
| 16504 | int n; |
| 16505 | Newxc(reti->code_blocks, ri->num_code_blocks, struct reg_code_block, |
| 16506 | struct reg_code_block); |
| 16507 | Copy(ri->code_blocks, reti->code_blocks, ri->num_code_blocks, |
| 16508 | struct reg_code_block); |
| 16509 | for (n = 0; n < ri->num_code_blocks; n++) |
| 16510 | reti->code_blocks[n].src_regex = (REGEXP*) |
| 16511 | sv_dup_inc((SV*)(ri->code_blocks[n].src_regex), param); |
| 16512 | } |
| 16513 | else |
| 16514 | reti->code_blocks = NULL; |
| 16515 | |
| 16516 | reti->regstclass = NULL; |
| 16517 | |
| 16518 | if (ri->data) { |
| 16519 | struct reg_data *d; |
| 16520 | const int count = ri->data->count; |
| 16521 | int i; |
| 16522 | |
| 16523 | Newxc(d, sizeof(struct reg_data) + count*sizeof(void *), |
| 16524 | char, struct reg_data); |
| 16525 | Newx(d->what, count, U8); |
| 16526 | |
| 16527 | d->count = count; |
| 16528 | for (i = 0; i < count; i++) { |
| 16529 | d->what[i] = ri->data->what[i]; |
| 16530 | switch (d->what[i]) { |
| 16531 | /* see also regcomp.h and regfree_internal() */ |
| 16532 | case 'a': /* actually an AV, but the dup function is identical. */ |
| 16533 | case 'r': |
| 16534 | case 's': |
| 16535 | case 'S': |
| 16536 | case 'u': /* actually an HV, but the dup function is identical. */ |
| 16537 | d->data[i] = sv_dup_inc((const SV *)ri->data->data[i], param); |
| 16538 | break; |
| 16539 | case 'f': |
| 16540 | /* This is cheating. */ |
| 16541 | Newx(d->data[i], 1, regnode_ssc); |
| 16542 | StructCopy(ri->data->data[i], d->data[i], regnode_ssc); |
| 16543 | reti->regstclass = (regnode*)d->data[i]; |
| 16544 | break; |
| 16545 | case 'T': |
| 16546 | /* Trie stclasses are readonly and can thus be shared |
| 16547 | * without duplication. We free the stclass in pregfree |
| 16548 | * when the corresponding reg_ac_data struct is freed. |
| 16549 | */ |
| 16550 | reti->regstclass= ri->regstclass; |
| 16551 | /* FALLTHROUGH */ |
| 16552 | case 't': |
| 16553 | OP_REFCNT_LOCK; |
| 16554 | ((reg_trie_data*)ri->data->data[i])->refcount++; |
| 16555 | OP_REFCNT_UNLOCK; |
| 16556 | /* FALLTHROUGH */ |
| 16557 | case 'l': |
| 16558 | case 'L': |
| 16559 | d->data[i] = ri->data->data[i]; |
| 16560 | break; |
| 16561 | default: |
| 16562 | Perl_croak(aTHX_ "panic: re_dup unknown data code '%c'", |
| 16563 | ri->data->what[i]); |
| 16564 | } |
| 16565 | } |
| 16566 | |
| 16567 | reti->data = d; |
| 16568 | } |
| 16569 | else |
| 16570 | reti->data = NULL; |
| 16571 | |
| 16572 | reti->name_list_idx = ri->name_list_idx; |
| 16573 | |
| 16574 | #ifdef RE_TRACK_PATTERN_OFFSETS |
| 16575 | if (ri->u.offsets) { |
| 16576 | Newx(reti->u.offsets, 2*len+1, U32); |
| 16577 | Copy(ri->u.offsets, reti->u.offsets, 2*len+1, U32); |
| 16578 | } |
| 16579 | #else |
| 16580 | SetProgLen(reti,len); |
| 16581 | #endif |
| 16582 | |
| 16583 | return (void*)reti; |
| 16584 | } |
| 16585 | |
| 16586 | #endif /* USE_ITHREADS */ |
| 16587 | |
| 16588 | #ifndef PERL_IN_XSUB_RE |
| 16589 | |
| 16590 | /* |
| 16591 | - regnext - dig the "next" pointer out of a node |
| 16592 | */ |
| 16593 | regnode * |
| 16594 | Perl_regnext(pTHX_ regnode *p) |
| 16595 | { |
| 16596 | I32 offset; |
| 16597 | |
| 16598 | if (!p) |
| 16599 | return(NULL); |
| 16600 | |
| 16601 | if (OP(p) > REGNODE_MAX) { /* regnode.type is unsigned */ |
| 16602 | Perl_croak(aTHX_ "Corrupted regexp opcode %d > %d", |
| 16603 | (int)OP(p), (int)REGNODE_MAX); |
| 16604 | } |
| 16605 | |
| 16606 | offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p)); |
| 16607 | if (offset == 0) |
| 16608 | return(NULL); |
| 16609 | |
| 16610 | return(p+offset); |
| 16611 | } |
| 16612 | #endif |
| 16613 | |
| 16614 | STATIC void |
| 16615 | S_re_croak2(pTHX_ bool utf8, const char* pat1,const char* pat2,...) |
| 16616 | { |
| 16617 | va_list args; |
| 16618 | STRLEN l1 = strlen(pat1); |
| 16619 | STRLEN l2 = strlen(pat2); |
| 16620 | char buf[512]; |
| 16621 | SV *msv; |
| 16622 | const char *message; |
| 16623 | |
| 16624 | PERL_ARGS_ASSERT_RE_CROAK2; |
| 16625 | |
| 16626 | if (l1 > 510) |
| 16627 | l1 = 510; |
| 16628 | if (l1 + l2 > 510) |
| 16629 | l2 = 510 - l1; |
| 16630 | Copy(pat1, buf, l1 , char); |
| 16631 | Copy(pat2, buf + l1, l2 , char); |
| 16632 | buf[l1 + l2] = '\n'; |
| 16633 | buf[l1 + l2 + 1] = '\0'; |
| 16634 | va_start(args, pat2); |
| 16635 | msv = vmess(buf, &args); |
| 16636 | va_end(args); |
| 16637 | message = SvPV_const(msv,l1); |
| 16638 | if (l1 > 512) |
| 16639 | l1 = 512; |
| 16640 | Copy(message, buf, l1 , char); |
| 16641 | /* l1-1 to avoid \n */ |
| 16642 | Perl_croak(aTHX_ "%"UTF8f, UTF8fARG(utf8, l1-1, buf)); |
| 16643 | } |
| 16644 | |
| 16645 | /* XXX Here's a total kludge. But we need to re-enter for swash routines. */ |
| 16646 | |
| 16647 | #ifndef PERL_IN_XSUB_RE |
| 16648 | void |
| 16649 | Perl_save_re_context(pTHX) |
| 16650 | { |
| 16651 | /* Save $1..$n (#18107: UTF-8 s/(\w+)/uc($1)/e); AMS 20021106. */ |
| 16652 | if (PL_curpm) { |
| 16653 | const REGEXP * const rx = PM_GETRE(PL_curpm); |
| 16654 | if (rx) { |
| 16655 | U32 i; |
| 16656 | for (i = 1; i <= RX_NPARENS(rx); i++) { |
| 16657 | char digits[TYPE_CHARS(long)]; |
| 16658 | const STRLEN len = my_snprintf(digits, sizeof(digits), |
| 16659 | "%lu", (long)i); |
| 16660 | GV *const *const gvp |
| 16661 | = (GV**)hv_fetch(PL_defstash, digits, len, 0); |
| 16662 | |
| 16663 | if (gvp) { |
| 16664 | GV * const gv = *gvp; |
| 16665 | if (SvTYPE(gv) == SVt_PVGV && GvSV(gv)) |
| 16666 | save_scalar(gv); |
| 16667 | } |
| 16668 | } |
| 16669 | } |
| 16670 | } |
| 16671 | } |
| 16672 | #endif |
| 16673 | |
| 16674 | #ifdef DEBUGGING |
| 16675 | |
| 16676 | /* Given that c is a control character, is it one for which we have a |
| 16677 | * mnemonic? */ |
| 16678 | #define isMNEMONIC_CNTRL(c) ((isSPACE_A(c) && (c) != '\v') \ |
| 16679 | || (c) == '\a' \ |
| 16680 | || (c) == '\b' \ |
| 16681 | || (c) == ESC_NATIVE) |
| 16682 | /* Certain characters are output as a sequence with the first being a |
| 16683 | * backslash. */ |
| 16684 | #define isBACKSLASHED_PUNCT(c) \ |
| 16685 | ((c) == '-' || (c) == ']' || (c) == '\\' || (c) == '^') |
| 16686 | |
| 16687 | STATIC void |
| 16688 | S_put_byte(pTHX_ SV *sv, int c) |
| 16689 | { |
| 16690 | PERL_ARGS_ASSERT_PUT_BYTE; |
| 16691 | |
| 16692 | if (!isPRINT(c)) { |
| 16693 | switch (c) { |
| 16694 | case '\a': Perl_sv_catpvf(aTHX_ sv, "\\a"); break; |
| 16695 | case '\b': Perl_sv_catpvf(aTHX_ sv, "\\b"); break; |
| 16696 | case ESC_NATIVE: Perl_sv_catpvf(aTHX_ sv, "\\e"); break; |
| 16697 | case '\f': Perl_sv_catpvf(aTHX_ sv, "\\f"); break; |
| 16698 | case '\n': Perl_sv_catpvf(aTHX_ sv, "\\n"); break; |
| 16699 | case '\r': Perl_sv_catpvf(aTHX_ sv, "\\r"); break; |
| 16700 | case '\t': Perl_sv_catpvf(aTHX_ sv, "\\t"); break; |
| 16701 | default: Perl_sv_catpvf(aTHX_ sv, "\\x{%02X}", c); break; |
| 16702 | } |
| 16703 | } |
| 16704 | else { |
| 16705 | const char string = c; |
| 16706 | if (isBACKSLASHED_PUNCT(c)) |
| 16707 | sv_catpvs(sv, "\\"); |
| 16708 | sv_catpvn(sv, &string, 1); |
| 16709 | } |
| 16710 | } |
| 16711 | |
| 16712 | #define MAX_PRINT_A MAX_PRINT_A_FOR_USE_ONLY_BY_REGCOMP_DOT_C |
| 16713 | |
| 16714 | #ifndef MIN |
| 16715 | #define MIN(a,b) ((a) < (b) ? (a) : (b)) |
| 16716 | #endif |
| 16717 | |
| 16718 | STATIC void |
| 16719 | S_put_range(pTHX_ SV *sv, UV start, const UV end, const bool allow_literals) |
| 16720 | { |
| 16721 | /* Appends to 'sv' a displayable version of the range of code points from |
| 16722 | * 'start' to 'end'. It assumes that only ASCII printables are displayable |
| 16723 | * as-is (though some of these will be escaped by put_byte()). */ |
| 16724 | |
| 16725 | const unsigned int min_range_count = 3; |
| 16726 | |
| 16727 | assert(start <= end); |
| 16728 | |
| 16729 | PERL_ARGS_ASSERT_PUT_RANGE; |
| 16730 | |
| 16731 | while (start <= end) { |
| 16732 | if (end - start < min_range_count) { |
| 16733 | |
| 16734 | /* Individual chars in short ranges */ |
| 16735 | for (; start <= end; start++) { |
| 16736 | put_byte(sv, start); |
| 16737 | } |
| 16738 | break; |
| 16739 | } |
| 16740 | |
| 16741 | /* If permitted by the input options, and there is a possibility that |
| 16742 | * this range contains a printable literal, look to see if there is |
| 16743 | * one. */ |
| 16744 | if (allow_literals && start <= MAX_PRINT_A) { |
| 16745 | |
| 16746 | /* If the range begin isn't an ASCII printable, effectively split |
| 16747 | * the range into two parts: |
| 16748 | * 1) the portion before the first such printable, |
| 16749 | * 2) the rest |
| 16750 | * and output them separately. */ |
| 16751 | if (! isPRINT_A(start)) { |
| 16752 | UV temp_end = start + 1; |
| 16753 | |
| 16754 | /* There is no point looking beyond the final possible |
| 16755 | * printable, in MAX_PRINT_A */ |
| 16756 | UV max = MIN(end, MAX_PRINT_A); |
| 16757 | |
| 16758 | while (temp_end <= max && ! isPRINT_A(temp_end)) { |
| 16759 | temp_end++; |
| 16760 | } |
| 16761 | |
| 16762 | /* Here, temp_end points to one beyond the first printable if |
| 16763 | * found, or to one beyond 'max' if not. If none found, make |
| 16764 | * sure that we use the entire range */ |
| 16765 | if (temp_end > MAX_PRINT_A) { |
| 16766 | temp_end = end + 1; |
| 16767 | } |
| 16768 | |
| 16769 | /* Output the first part of the split range, the part that |
| 16770 | * doesn't have printables, with no looking for literals |
| 16771 | * (otherwise we would infinitely recurse) */ |
| 16772 | put_range(sv, start, temp_end - 1, FALSE); |
| 16773 | |
| 16774 | /* The 2nd part of the range (if any) starts here. */ |
| 16775 | start = temp_end; |
| 16776 | |
| 16777 | /* We continue instead of dropping down because even if the 2nd |
| 16778 | * part is non-empty, it could be so short that we want to |
| 16779 | * output it specially, as tested for at the top of this loop. |
| 16780 | * */ |
| 16781 | continue; |
| 16782 | } |
| 16783 | |
| 16784 | /* Here, 'start' is a printable ASCII. If it is an alphanumeric, |
| 16785 | * output a sub-range of just the digits or letters, then process |
| 16786 | * the remaining portion as usual. */ |
| 16787 | if (isALPHANUMERIC_A(start)) { |
| 16788 | UV mask = (isDIGIT_A(start)) |
| 16789 | ? _CC_DIGIT |
| 16790 | : isUPPER_A(start) |
| 16791 | ? _CC_UPPER |
| 16792 | : _CC_LOWER; |
| 16793 | UV temp_end = start + 1; |
| 16794 | |
| 16795 | /* Find the end of the sub-range that includes just the |
| 16796 | * characters in the same class as the first character in it */ |
| 16797 | while (temp_end <= end && _generic_isCC_A(temp_end, mask)) { |
| 16798 | temp_end++; |
| 16799 | } |
| 16800 | temp_end--; |
| 16801 | |
| 16802 | /* For short ranges, don't duplicate the code above to output |
| 16803 | * them; just call recursively */ |
| 16804 | if (temp_end - start < min_range_count) { |
| 16805 | put_range(sv, start, temp_end, FALSE); |
| 16806 | } |
| 16807 | else { /* Output as a range */ |
| 16808 | put_byte(sv, start); |
| 16809 | sv_catpvs(sv, "-"); |
| 16810 | put_byte(sv, temp_end); |
| 16811 | } |
| 16812 | start = temp_end + 1; |
| 16813 | continue; |
| 16814 | } |
| 16815 | |
| 16816 | /* We output any other printables as individual characters */ |
| 16817 | if (isPUNCT_A(start) || isSPACE_A(start)) { |
| 16818 | while (start <= end && (isPUNCT_A(start) |
| 16819 | || isSPACE_A(start))) |
| 16820 | { |
| 16821 | put_byte(sv, start); |
| 16822 | start++; |
| 16823 | } |
| 16824 | continue; |
| 16825 | } |
| 16826 | } /* End of looking for literals */ |
| 16827 | |
| 16828 | /* Here is not to output as a literal. Some control characters have |
| 16829 | * mnemonic names. Split off any of those at the beginning and end of |
| 16830 | * the range to print mnemonically. It isn't possible for many of |
| 16831 | * these to be in a row, so this won't overwhelm with output */ |
| 16832 | if (isMNEMONIC_CNTRL(start)) { |
| 16833 | while (isMNEMONIC_CNTRL(start) && start <= end) { |
| 16834 | put_byte(sv, start); |
| 16835 | start++; |
| 16836 | } |
| 16837 | } |
| 16838 | if (start < end && isMNEMONIC_CNTRL(end)) { |
| 16839 | |
| 16840 | /* Here, the final character in the range has a mnemonic name. |
| 16841 | * Work backwards from the end to find the final non-mnemonic */ |
| 16842 | UV temp_end = end - 1; |
| 16843 | while (isMNEMONIC_CNTRL(temp_end)) { |
| 16844 | temp_end--; |
| 16845 | } |
| 16846 | |
| 16847 | /* And separately output the range that doesn't have mnemonics */ |
| 16848 | put_range(sv, start, temp_end, FALSE); |
| 16849 | |
| 16850 | /* Then output the mnemonic trailing controls */ |
| 16851 | start = temp_end + 1; |
| 16852 | while (start <= end) { |
| 16853 | put_byte(sv, start); |
| 16854 | start++; |
| 16855 | } |
| 16856 | break; |
| 16857 | } |
| 16858 | |
| 16859 | /* As a final resort, output the range or subrange as hex. */ |
| 16860 | Perl_sv_catpvf(aTHX_ sv, "\\x{%02" UVXf "}-\\x{%02" UVXf "}", |
| 16861 | start, |
| 16862 | (end < NUM_ANYOF_CODE_POINTS) |
| 16863 | ? end |
| 16864 | : NUM_ANYOF_CODE_POINTS - 1); |
| 16865 | break; |
| 16866 | } |
| 16867 | } |
| 16868 | |
| 16869 | STATIC bool |
| 16870 | S_put_charclass_bitmap_innards(pTHX_ SV *sv, char *bitmap, SV** bitmap_invlist) |
| 16871 | { |
| 16872 | /* Appends to 'sv' a displayable version of the innards of the bracketed |
| 16873 | * character class whose bitmap is 'bitmap'; Returns 'TRUE' if it actually |
| 16874 | * output anything, and bitmap_invlist, if not NULL, will point to an |
| 16875 | * inversion list of what is in the bit map */ |
| 16876 | |
| 16877 | int i; |
| 16878 | UV start, end; |
| 16879 | unsigned int punct_count = 0; |
| 16880 | SV* invlist = NULL; |
| 16881 | SV** invlist_ptr; /* Temporary, in case bitmap_invlist is NULL */ |
| 16882 | bool allow_literals = TRUE; |
| 16883 | |
| 16884 | PERL_ARGS_ASSERT_PUT_CHARCLASS_BITMAP_INNARDS; |
| 16885 | |
| 16886 | invlist_ptr = (bitmap_invlist) ? bitmap_invlist : &invlist; |
| 16887 | |
| 16888 | /* Worst case is exactly every-other code point is in the list */ |
| 16889 | *invlist_ptr = _new_invlist(NUM_ANYOF_CODE_POINTS / 2); |
| 16890 | |
| 16891 | /* Convert the bit map to an inversion list, keeping track of how many |
| 16892 | * ASCII puncts are set, including an extra amount for the backslashed |
| 16893 | * ones. */ |
| 16894 | for (i = 0; i < NUM_ANYOF_CODE_POINTS; i++) { |
| 16895 | if (BITMAP_TEST((U8 *) bitmap,i)) { |
| 16896 | *invlist_ptr = add_cp_to_invlist(*invlist_ptr, i); |
| 16897 | if (isPUNCT_A(i)) { |
| 16898 | punct_count++; |
| 16899 | if isBACKSLASHED_PUNCT(i) { |
| 16900 | punct_count++; |
| 16901 | } |
| 16902 | } |
| 16903 | } |
| 16904 | } |
| 16905 | |
| 16906 | /* Nothing to output */ |
| 16907 | if (_invlist_len(*invlist_ptr) == 0) { |
| 16908 | SvREFCNT_dec(invlist); |
| 16909 | return FALSE; |
| 16910 | } |
| 16911 | |
| 16912 | /* Generally, it is more readable if printable characters are output as |
| 16913 | * literals, but if a range (nearly) spans all of them, it's best to output |
| 16914 | * it as a single range. This code will use a single range if all but 2 |
| 16915 | * printables are in it */ |
| 16916 | invlist_iterinit(*invlist_ptr); |
| 16917 | while (invlist_iternext(*invlist_ptr, &start, &end)) { |
| 16918 | |
| 16919 | /* If range starts beyond final printable, it doesn't have any in it */ |
| 16920 | if (start > MAX_PRINT_A) { |
| 16921 | break; |
| 16922 | } |
| 16923 | |
| 16924 | /* In both ASCII and EBCDIC, a SPACE is the lowest printable. To span |
| 16925 | * all but two, the range must start and end no later than 2 from |
| 16926 | * either end */ |
| 16927 | if (start < ' ' + 2 && end > MAX_PRINT_A - 2) { |
| 16928 | if (end > MAX_PRINT_A) { |
| 16929 | end = MAX_PRINT_A; |
| 16930 | } |
| 16931 | if (start < ' ') { |
| 16932 | start = ' '; |
| 16933 | } |
| 16934 | if (end - start >= MAX_PRINT_A - ' ' - 2) { |
| 16935 | allow_literals = FALSE; |
| 16936 | } |
| 16937 | break; |
| 16938 | } |
| 16939 | } |
| 16940 | invlist_iterfinish(*invlist_ptr); |
| 16941 | |
| 16942 | /* The legibility of the output depends mostly on how many punctuation |
| 16943 | * characters are output. There are 32 possible ASCII ones, and some have |
| 16944 | * an additional backslash, bringing it to currently 36, so if any more |
| 16945 | * than 18 are to be output, we can instead output it as its complement, |
| 16946 | * yielding fewer puncts, and making it more legible. But give some weight |
| 16947 | * to the fact that outputting it as a complement is less legible than a |
| 16948 | * straight output, so don't complement unless we are somewhat over the 18 |
| 16949 | * mark */ |
| 16950 | if (allow_literals && punct_count > 22) { |
| 16951 | sv_catpvs(sv, "^"); |
| 16952 | |
| 16953 | /* Add everything remaining to the list, so when we invert it just |
| 16954 | * below, it will be excluded */ |
| 16955 | *invlist_ptr = _add_range_to_invlist(*invlist_ptr, |
| 16956 | NUM_ANYOF_CODE_POINTS, UV_MAX); |
| 16957 | _invlist_invert(*invlist_ptr); |
| 16958 | } |
| 16959 | |
| 16960 | /* Here we have figured things out. Output each range */ |
| 16961 | invlist_iterinit(*invlist_ptr); |
| 16962 | while (invlist_iternext(*invlist_ptr, &start, &end)) { |
| 16963 | if (start >= NUM_ANYOF_CODE_POINTS) { |
| 16964 | break; |
| 16965 | } |
| 16966 | put_range(sv, start, end, allow_literals); |
| 16967 | } |
| 16968 | invlist_iterfinish(*invlist_ptr); |
| 16969 | |
| 16970 | return TRUE; |
| 16971 | } |
| 16972 | |
| 16973 | #define CLEAR_OPTSTART \ |
| 16974 | if (optstart) STMT_START { \ |
| 16975 | DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log, \ |
| 16976 | " (%"IVdf" nodes)\n", (IV)(node - optstart))); \ |
| 16977 | optstart=NULL; \ |
| 16978 | } STMT_END |
| 16979 | |
| 16980 | #define DUMPUNTIL(b,e) \ |
| 16981 | CLEAR_OPTSTART; \ |
| 16982 | node=dumpuntil(r,start,(b),(e),last,sv,indent+1,depth+1); |
| 16983 | |
| 16984 | STATIC const regnode * |
| 16985 | S_dumpuntil(pTHX_ const regexp *r, const regnode *start, const regnode *node, |
| 16986 | const regnode *last, const regnode *plast, |
| 16987 | SV* sv, I32 indent, U32 depth) |
| 16988 | { |
| 16989 | U8 op = PSEUDO; /* Arbitrary non-END op. */ |
| 16990 | const regnode *next; |
| 16991 | const regnode *optstart= NULL; |
| 16992 | |
| 16993 | RXi_GET_DECL(r,ri); |
| 16994 | GET_RE_DEBUG_FLAGS_DECL; |
| 16995 | |
| 16996 | PERL_ARGS_ASSERT_DUMPUNTIL; |
| 16997 | |
| 16998 | #ifdef DEBUG_DUMPUNTIL |
| 16999 | PerlIO_printf(Perl_debug_log, "--- %d : %d - %d - %d\n",indent,node-start, |
| 17000 | last ? last-start : 0,plast ? plast-start : 0); |
| 17001 | #endif |
| 17002 | |
| 17003 | if (plast && plast < last) |
| 17004 | last= plast; |
| 17005 | |
| 17006 | while (PL_regkind[op] != END && (!last || node < last)) { |
| 17007 | assert(node); |
| 17008 | /* While that wasn't END last time... */ |
| 17009 | NODE_ALIGN(node); |
| 17010 | op = OP(node); |
| 17011 | if (op == CLOSE || op == WHILEM) |
| 17012 | indent--; |
| 17013 | next = regnext((regnode *)node); |
| 17014 | |
| 17015 | /* Where, what. */ |
| 17016 | if (OP(node) == OPTIMIZED) { |
| 17017 | if (!optstart && RE_DEBUG_FLAG(RE_DEBUG_COMPILE_OPTIMISE)) |
| 17018 | optstart = node; |
| 17019 | else |
| 17020 | goto after_print; |
| 17021 | } else |
| 17022 | CLEAR_OPTSTART; |
| 17023 | |
| 17024 | regprop(r, sv, node, NULL); |
| 17025 | PerlIO_printf(Perl_debug_log, "%4"IVdf":%*s%s", (IV)(node - start), |
| 17026 | (int)(2*indent + 1), "", SvPVX_const(sv)); |
| 17027 | |
| 17028 | if (OP(node) != OPTIMIZED) { |
| 17029 | if (next == NULL) /* Next ptr. */ |
| 17030 | PerlIO_printf(Perl_debug_log, " (0)"); |
| 17031 | else if (PL_regkind[(U8)op] == BRANCH |
| 17032 | && PL_regkind[OP(next)] != BRANCH ) |
| 17033 | PerlIO_printf(Perl_debug_log, " (FAIL)"); |
| 17034 | else |
| 17035 | PerlIO_printf(Perl_debug_log, " (%"IVdf")", (IV)(next - start)); |
| 17036 | (void)PerlIO_putc(Perl_debug_log, '\n'); |
| 17037 | } |
| 17038 | |
| 17039 | after_print: |
| 17040 | if (PL_regkind[(U8)op] == BRANCHJ) { |
| 17041 | assert(next); |
| 17042 | { |
| 17043 | const regnode *nnode = (OP(next) == LONGJMP |
| 17044 | ? regnext((regnode *)next) |
| 17045 | : next); |
| 17046 | if (last && nnode > last) |
| 17047 | nnode = last; |
| 17048 | DUMPUNTIL(NEXTOPER(NEXTOPER(node)), nnode); |
| 17049 | } |
| 17050 | } |
| 17051 | else if (PL_regkind[(U8)op] == BRANCH) { |
| 17052 | assert(next); |
| 17053 | DUMPUNTIL(NEXTOPER(node), next); |
| 17054 | } |
| 17055 | else if ( PL_regkind[(U8)op] == TRIE ) { |
| 17056 | const regnode *this_trie = node; |
| 17057 | const char op = OP(node); |
| 17058 | const U32 n = ARG(node); |
| 17059 | const reg_ac_data * const ac = op>=AHOCORASICK ? |
| 17060 | (reg_ac_data *)ri->data->data[n] : |
| 17061 | NULL; |
| 17062 | const reg_trie_data * const trie = |
| 17063 | (reg_trie_data*)ri->data->data[op<AHOCORASICK ? n : ac->trie]; |
| 17064 | #ifdef DEBUGGING |
| 17065 | AV *const trie_words |
| 17066 | = MUTABLE_AV(ri->data->data[n + TRIE_WORDS_OFFSET]); |
| 17067 | #endif |
| 17068 | const regnode *nextbranch= NULL; |
| 17069 | I32 word_idx; |
| 17070 | sv_setpvs(sv, ""); |
| 17071 | for (word_idx= 0; word_idx < (I32)trie->wordcount; word_idx++) { |
| 17072 | SV ** const elem_ptr = av_fetch(trie_words,word_idx,0); |
| 17073 | |
| 17074 | PerlIO_printf(Perl_debug_log, "%*s%s ", |
| 17075 | (int)(2*(indent+3)), "", |
| 17076 | elem_ptr |
| 17077 | ? pv_pretty(sv, SvPV_nolen_const(*elem_ptr), |
| 17078 | SvCUR(*elem_ptr), 60, |
| 17079 | PL_colors[0], PL_colors[1], |
| 17080 | (SvUTF8(*elem_ptr) |
| 17081 | ? PERL_PV_ESCAPE_UNI |
| 17082 | : 0) |
| 17083 | | PERL_PV_PRETTY_ELLIPSES |
| 17084 | | PERL_PV_PRETTY_LTGT |
| 17085 | ) |
| 17086 | : "???" |
| 17087 | ); |
| 17088 | if (trie->jump) { |
| 17089 | U16 dist= trie->jump[word_idx+1]; |
| 17090 | PerlIO_printf(Perl_debug_log, "(%"UVuf")\n", |
| 17091 | (UV)((dist ? this_trie + dist : next) - start)); |
| 17092 | if (dist) { |
| 17093 | if (!nextbranch) |
| 17094 | nextbranch= this_trie + trie->jump[0]; |
| 17095 | DUMPUNTIL(this_trie + dist, nextbranch); |
| 17096 | } |
| 17097 | if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH) |
| 17098 | nextbranch= regnext((regnode *)nextbranch); |
| 17099 | } else { |
| 17100 | PerlIO_printf(Perl_debug_log, "\n"); |
| 17101 | } |
| 17102 | } |
| 17103 | if (last && next > last) |
| 17104 | node= last; |
| 17105 | else |
| 17106 | node= next; |
| 17107 | } |
| 17108 | else if ( op == CURLY ) { /* "next" might be very big: optimizer */ |
| 17109 | DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS, |
| 17110 | NEXTOPER(node) + EXTRA_STEP_2ARGS + 1); |
| 17111 | } |
| 17112 | else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) { |
| 17113 | assert(next); |
| 17114 | DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS, next); |
| 17115 | } |
| 17116 | else if ( op == PLUS || op == STAR) { |
| 17117 | DUMPUNTIL(NEXTOPER(node), NEXTOPER(node) + 1); |
| 17118 | } |
| 17119 | else if (PL_regkind[(U8)op] == ANYOF) { |
| 17120 | /* arglen 1 + class block */ |
| 17121 | node += 1 + ((ANYOF_FLAGS(node) & ANYOF_POSIXL) |
| 17122 | ? ANYOF_POSIXL_SKIP |
| 17123 | : ANYOF_SKIP); |
| 17124 | node = NEXTOPER(node); |
| 17125 | } |
| 17126 | else if (PL_regkind[(U8)op] == EXACT) { |
| 17127 | /* Literal string, where present. */ |
| 17128 | node += NODE_SZ_STR(node) - 1; |
| 17129 | node = NEXTOPER(node); |
| 17130 | } |
| 17131 | else { |
| 17132 | node = NEXTOPER(node); |
| 17133 | node += regarglen[(U8)op]; |
| 17134 | } |
| 17135 | if (op == CURLYX || op == OPEN) |
| 17136 | indent++; |
| 17137 | } |
| 17138 | CLEAR_OPTSTART; |
| 17139 | #ifdef DEBUG_DUMPUNTIL |
| 17140 | PerlIO_printf(Perl_debug_log, "--- %d\n", (int)indent); |
| 17141 | #endif |
| 17142 | return node; |
| 17143 | } |
| 17144 | |
| 17145 | #endif /* DEBUGGING */ |
| 17146 | |
| 17147 | /* |
| 17148 | * Local variables: |
| 17149 | * c-indentation-style: bsd |
| 17150 | * c-basic-offset: 4 |
| 17151 | * indent-tabs-mode: nil |
| 17152 | * End: |
| 17153 | * |
| 17154 | * ex: set ts=8 sts=4 sw=4 et: |
| 17155 | */ |