| 1 | /* regcomp.c |
| 2 | */ |
| 3 | |
| 4 | /* |
| 5 | * "A fair jaw-cracker dwarf-language must be." --Samwise Gamgee |
| 6 | */ |
| 7 | |
| 8 | /* NOTE: this is derived from Henry Spencer's regexp code, and should not |
| 9 | * confused with the original package (see point 3 below). Thanks, Henry! |
| 10 | */ |
| 11 | |
| 12 | /* Additional note: this code is very heavily munged from Henry's version |
| 13 | * in places. In some spots I've traded clarity for efficiency, so don't |
| 14 | * blame Henry for some of the lack of readability. |
| 15 | */ |
| 16 | |
| 17 | /* The names of the functions have been changed from regcomp and |
| 18 | * regexec to pregcomp and pregexec in order to avoid conflicts |
| 19 | * with the POSIX routines of the same names. |
| 20 | */ |
| 21 | |
| 22 | #ifdef PERL_EXT_RE_BUILD |
| 23 | /* need to replace pregcomp et al, so enable that */ |
| 24 | # ifndef PERL_IN_XSUB_RE |
| 25 | # define PERL_IN_XSUB_RE |
| 26 | # endif |
| 27 | /* need access to debugger hooks */ |
| 28 | # if defined(PERL_EXT_RE_DEBUG) && !defined(DEBUGGING) |
| 29 | # define DEBUGGING |
| 30 | # endif |
| 31 | #endif |
| 32 | |
| 33 | #ifdef PERL_IN_XSUB_RE |
| 34 | /* We *really* need to overwrite these symbols: */ |
| 35 | # define Perl_pregcomp my_regcomp |
| 36 | # define Perl_regdump my_regdump |
| 37 | # define Perl_regprop my_regprop |
| 38 | # define Perl_pregfree my_regfree |
| 39 | # define Perl_re_intuit_string my_re_intuit_string |
| 40 | /* *These* symbols are masked to allow static link. */ |
| 41 | # define Perl_regnext my_regnext |
| 42 | # define Perl_save_re_context my_save_re_context |
| 43 | # define Perl_reginitcolors my_reginitcolors |
| 44 | |
| 45 | # define PERL_NO_GET_CONTEXT |
| 46 | #endif |
| 47 | |
| 48 | /*SUPPRESS 112*/ |
| 49 | /* |
| 50 | * pregcomp and pregexec -- regsub and regerror are not used in perl |
| 51 | * |
| 52 | * Copyright (c) 1986 by University of Toronto. |
| 53 | * Written by Henry Spencer. Not derived from licensed software. |
| 54 | * |
| 55 | * Permission is granted to anyone to use this software for any |
| 56 | * purpose on any computer system, and to redistribute it freely, |
| 57 | * subject to the following restrictions: |
| 58 | * |
| 59 | * 1. The author is not responsible for the consequences of use of |
| 60 | * this software, no matter how awful, even if they arise |
| 61 | * from defects in it. |
| 62 | * |
| 63 | * 2. The origin of this software must not be misrepresented, either |
| 64 | * by explicit claim or by omission. |
| 65 | * |
| 66 | * 3. Altered versions must be plainly marked as such, and must not |
| 67 | * be misrepresented as being the original software. |
| 68 | * |
| 69 | * |
| 70 | **** Alterations to Henry's code are... |
| 71 | **** |
| 72 | **** Copyright (c) 1991-2001, Larry Wall |
| 73 | **** |
| 74 | **** You may distribute under the terms of either the GNU General Public |
| 75 | **** License or the Artistic License, as specified in the README file. |
| 76 | |
| 77 | * |
| 78 | * Beware that some of this code is subtly aware of the way operator |
| 79 | * precedence is structured in regular expressions. Serious changes in |
| 80 | * regular-expression syntax might require a total rethink. |
| 81 | */ |
| 82 | #include "EXTERN.h" |
| 83 | #define PERL_IN_REGCOMP_C |
| 84 | #include "perl.h" |
| 85 | |
| 86 | #ifndef PERL_IN_XSUB_RE |
| 87 | # include "INTERN.h" |
| 88 | #endif |
| 89 | |
| 90 | #define REG_COMP_C |
| 91 | #include "regcomp.h" |
| 92 | |
| 93 | #ifdef op |
| 94 | #undef op |
| 95 | #endif /* op */ |
| 96 | |
| 97 | #ifdef MSDOS |
| 98 | # if defined(BUGGY_MSC6) |
| 99 | /* MSC 6.00A breaks on op/regexp.t test 85 unless we turn this off */ |
| 100 | # pragma optimize("a",off) |
| 101 | /* But MSC 6.00A is happy with 'w', for aliases only across function calls*/ |
| 102 | # pragma optimize("w",on ) |
| 103 | # endif /* BUGGY_MSC6 */ |
| 104 | #endif /* MSDOS */ |
| 105 | |
| 106 | #ifndef STATIC |
| 107 | #define STATIC static |
| 108 | #endif |
| 109 | |
| 110 | typedef struct RExC_state_t { |
| 111 | U16 flags16; /* are we folding, multilining? */ |
| 112 | char *precomp; /* uncompiled string. */ |
| 113 | regexp *rx; |
| 114 | char *start; /* Start of input for compile */ |
| 115 | char *end; /* End of input for compile */ |
| 116 | char *parse; /* Input-scan pointer. */ |
| 117 | I32 whilem_seen; /* number of WHILEM in this expr */ |
| 118 | regnode *emit_start; /* Start of emitted-code area */ |
| 119 | regnode *emit; /* Code-emit pointer; ®dummy = don't = compiling */ |
| 120 | I32 naughty; /* How bad is this pattern? */ |
| 121 | I32 sawback; /* Did we see \1, ...? */ |
| 122 | U32 seen; |
| 123 | I32 size; /* Code size. */ |
| 124 | I32 npar; /* () count. */ |
| 125 | I32 extralen; |
| 126 | I32 seen_zerolen; |
| 127 | I32 seen_evals; |
| 128 | I32 utf8; |
| 129 | #if ADD_TO_REGEXEC |
| 130 | char *starttry; /* -Dr: where regtry was called. */ |
| 131 | #define RExC_starttry (pRExC_state->starttry) |
| 132 | #endif |
| 133 | } RExC_state_t; |
| 134 | |
| 135 | #define RExC_flags16 (pRExC_state->flags16) |
| 136 | #define RExC_precomp (pRExC_state->precomp) |
| 137 | #define RExC_rx (pRExC_state->rx) |
| 138 | #define RExC_start (pRExC_state->start) |
| 139 | #define RExC_end (pRExC_state->end) |
| 140 | #define RExC_parse (pRExC_state->parse) |
| 141 | #define RExC_whilem_seen (pRExC_state->whilem_seen) |
| 142 | #define RExC_offsets (pRExC_state->rx->offsets) /* I am not like the others */ |
| 143 | #define RExC_emit (pRExC_state->emit) |
| 144 | #define RExC_emit_start (pRExC_state->emit_start) |
| 145 | #define RExC_naughty (pRExC_state->naughty) |
| 146 | #define RExC_sawback (pRExC_state->sawback) |
| 147 | #define RExC_seen (pRExC_state->seen) |
| 148 | #define RExC_size (pRExC_state->size) |
| 149 | #define RExC_npar (pRExC_state->npar) |
| 150 | #define RExC_extralen (pRExC_state->extralen) |
| 151 | #define RExC_seen_zerolen (pRExC_state->seen_zerolen) |
| 152 | #define RExC_seen_evals (pRExC_state->seen_evals) |
| 153 | #define RExC_utf8 (pRExC_state->utf8) |
| 154 | |
| 155 | #define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?') |
| 156 | #define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \ |
| 157 | ((*s) == '{' && regcurly(s))) |
| 158 | |
| 159 | #ifdef SPSTART |
| 160 | #undef SPSTART /* dratted cpp namespace... */ |
| 161 | #endif |
| 162 | /* |
| 163 | * Flags to be passed up and down. |
| 164 | */ |
| 165 | #define WORST 0 /* Worst case. */ |
| 166 | #define HASWIDTH 0x1 /* Known to match non-null strings. */ |
| 167 | #define SIMPLE 0x2 /* Simple enough to be STAR/PLUS operand. */ |
| 168 | #define SPSTART 0x4 /* Starts with * or +. */ |
| 169 | #define TRYAGAIN 0x8 /* Weeded out a declaration. */ |
| 170 | |
| 171 | /* Length of a variant. */ |
| 172 | |
| 173 | typedef struct scan_data_t { |
| 174 | I32 len_min; |
| 175 | I32 len_delta; |
| 176 | I32 pos_min; |
| 177 | I32 pos_delta; |
| 178 | SV *last_found; |
| 179 | I32 last_end; /* min value, <0 unless valid. */ |
| 180 | I32 last_start_min; |
| 181 | I32 last_start_max; |
| 182 | SV **longest; /* Either &l_fixed, or &l_float. */ |
| 183 | SV *longest_fixed; |
| 184 | I32 offset_fixed; |
| 185 | SV *longest_float; |
| 186 | I32 offset_float_min; |
| 187 | I32 offset_float_max; |
| 188 | I32 flags; |
| 189 | I32 whilem_c; |
| 190 | I32 *last_closep; |
| 191 | struct regnode_charclass_class *start_class; |
| 192 | } scan_data_t; |
| 193 | |
| 194 | /* |
| 195 | * Forward declarations for pregcomp()'s friends. |
| 196 | */ |
| 197 | |
| 198 | static scan_data_t zero_scan_data = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 199 | 0, 0, 0, 0, 0, 0}; |
| 200 | |
| 201 | #define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL) |
| 202 | #define SF_BEFORE_SEOL 0x1 |
| 203 | #define SF_BEFORE_MEOL 0x2 |
| 204 | #define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL) |
| 205 | #define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL) |
| 206 | |
| 207 | #ifdef NO_UNARY_PLUS |
| 208 | # define SF_FIX_SHIFT_EOL (0+2) |
| 209 | # define SF_FL_SHIFT_EOL (0+4) |
| 210 | #else |
| 211 | # define SF_FIX_SHIFT_EOL (+2) |
| 212 | # define SF_FL_SHIFT_EOL (+4) |
| 213 | #endif |
| 214 | |
| 215 | #define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL) |
| 216 | #define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL) |
| 217 | |
| 218 | #define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL) |
| 219 | #define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */ |
| 220 | #define SF_IS_INF 0x40 |
| 221 | #define SF_HAS_PAR 0x80 |
| 222 | #define SF_IN_PAR 0x100 |
| 223 | #define SF_HAS_EVAL 0x200 |
| 224 | #define SCF_DO_SUBSTR 0x400 |
| 225 | #define SCF_DO_STCLASS_AND 0x0800 |
| 226 | #define SCF_DO_STCLASS_OR 0x1000 |
| 227 | #define SCF_DO_STCLASS (SCF_DO_STCLASS_AND|SCF_DO_STCLASS_OR) |
| 228 | #define SCF_WHILEM_VISITED_POS 0x2000 |
| 229 | |
| 230 | #define UTF RExC_utf8 |
| 231 | #define LOC (RExC_flags16 & PMf_LOCALE) |
| 232 | #define FOLD (RExC_flags16 & PMf_FOLD) |
| 233 | |
| 234 | #define OOB_UNICODE 12345678 |
| 235 | #define OOB_NAMEDCLASS -1 |
| 236 | |
| 237 | #define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv)) |
| 238 | #define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b) |
| 239 | |
| 240 | |
| 241 | /* length of regex to show in messages that don't mark a position within */ |
| 242 | #define RegexLengthToShowInErrorMessages 127 |
| 243 | |
| 244 | /* |
| 245 | * If MARKER[12] are adjusted, be sure to adjust the constants at the top |
| 246 | * of t/op/regmesg.t, the tests in t/op/re_tests, and those in |
| 247 | * op/pragma/warn/regcomp. |
| 248 | */ |
| 249 | #define MARKER1 "<-- HERE" /* marker as it appears in the description */ |
| 250 | #define MARKER2 " <-- HERE " /* marker as it appears within the regex */ |
| 251 | |
| 252 | #define REPORT_LOCATION " in regex; marked by " MARKER1 " in m/%.*s" MARKER2 "%s/" |
| 253 | |
| 254 | /* |
| 255 | * Calls SAVEDESTRUCTOR_X if needed, then calls Perl_croak with the given |
| 256 | * arg. Show regex, up to a maximum length. If it's too long, chop and add |
| 257 | * "...". |
| 258 | */ |
| 259 | #define FAIL(msg) \ |
| 260 | STMT_START { \ |
| 261 | char *ellipses = ""; \ |
| 262 | unsigned len = strlen(RExC_precomp); \ |
| 263 | \ |
| 264 | if (!SIZE_ONLY) \ |
| 265 | SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \ |
| 266 | \ |
| 267 | if (len > RegexLengthToShowInErrorMessages) { \ |
| 268 | /* chop 10 shorter than the max, to ensure meaning of "..." */ \ |
| 269 | len = RegexLengthToShowInErrorMessages - 10; \ |
| 270 | ellipses = "..."; \ |
| 271 | } \ |
| 272 | Perl_croak(aTHX_ "%s in regex m/%.*s%s/", \ |
| 273 | msg, (int)len, RExC_precomp, ellipses); \ |
| 274 | } STMT_END |
| 275 | |
| 276 | /* |
| 277 | * Calls SAVEDESTRUCTOR_X if needed, then calls Perl_croak with the given |
| 278 | * args. Show regex, up to a maximum length. If it's too long, chop and add |
| 279 | * "...". |
| 280 | */ |
| 281 | #define FAIL2(pat,msg) \ |
| 282 | STMT_START { \ |
| 283 | char *ellipses = ""; \ |
| 284 | unsigned len = strlen(RExC_precomp); \ |
| 285 | \ |
| 286 | if (!SIZE_ONLY) \ |
| 287 | SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \ |
| 288 | \ |
| 289 | if (len > RegexLengthToShowInErrorMessages) { \ |
| 290 | /* chop 10 shorter than the max, to ensure meaning of "..." */ \ |
| 291 | len = RegexLengthToShowInErrorMessages - 10; \ |
| 292 | ellipses = "..."; \ |
| 293 | } \ |
| 294 | S_re_croak2(aTHX_ pat, " in regex m/%.*s%s/", \ |
| 295 | msg, (int)len, RExC_precomp, ellipses); \ |
| 296 | } STMT_END |
| 297 | |
| 298 | |
| 299 | /* |
| 300 | * Simple_vFAIL -- like FAIL, but marks the current location in the scan |
| 301 | */ |
| 302 | #define Simple_vFAIL(m) \ |
| 303 | STMT_START { \ |
| 304 | unsigned offset = strlen(RExC_precomp)-(RExC_end-RExC_parse); \ |
| 305 | \ |
| 306 | Perl_croak(aTHX_ "%s" REPORT_LOCATION, \ |
| 307 | m, (int)offset, RExC_precomp, RExC_precomp + offset); \ |
| 308 | } STMT_END |
| 309 | |
| 310 | /* |
| 311 | * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL() |
| 312 | */ |
| 313 | #define vFAIL(m) \ |
| 314 | STMT_START { \ |
| 315 | if (!SIZE_ONLY) \ |
| 316 | SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \ |
| 317 | Simple_vFAIL(m); \ |
| 318 | } STMT_END |
| 319 | |
| 320 | /* |
| 321 | * Like Simple_vFAIL(), but accepts two arguments. |
| 322 | */ |
| 323 | #define Simple_vFAIL2(m,a1) \ |
| 324 | STMT_START { \ |
| 325 | unsigned offset = strlen(RExC_precomp)-(RExC_end-RExC_parse); \ |
| 326 | \ |
| 327 | S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, \ |
| 328 | (int)offset, RExC_precomp, RExC_precomp + offset); \ |
| 329 | } STMT_END |
| 330 | |
| 331 | /* |
| 332 | * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL2(). |
| 333 | */ |
| 334 | #define vFAIL2(m,a1) \ |
| 335 | STMT_START { \ |
| 336 | if (!SIZE_ONLY) \ |
| 337 | SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \ |
| 338 | Simple_vFAIL2(m, a1); \ |
| 339 | } STMT_END |
| 340 | |
| 341 | |
| 342 | /* |
| 343 | * Like Simple_vFAIL(), but accepts three arguments. |
| 344 | */ |
| 345 | #define Simple_vFAIL3(m, a1, a2) \ |
| 346 | STMT_START { \ |
| 347 | unsigned offset = strlen(RExC_precomp)-(RExC_end-RExC_parse); \ |
| 348 | \ |
| 349 | S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, \ |
| 350 | (int)offset, RExC_precomp, RExC_precomp + offset); \ |
| 351 | } STMT_END |
| 352 | |
| 353 | /* |
| 354 | * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL3(). |
| 355 | */ |
| 356 | #define vFAIL3(m,a1,a2) \ |
| 357 | STMT_START { \ |
| 358 | if (!SIZE_ONLY) \ |
| 359 | SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \ |
| 360 | Simple_vFAIL3(m, a1, a2); \ |
| 361 | } STMT_END |
| 362 | |
| 363 | /* |
| 364 | * Like Simple_vFAIL(), but accepts four arguments. |
| 365 | */ |
| 366 | #define Simple_vFAIL4(m, a1, a2, a3) \ |
| 367 | STMT_START { \ |
| 368 | unsigned offset = strlen(RExC_precomp)-(RExC_end-RExC_parse); \ |
| 369 | \ |
| 370 | S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, a3,\ |
| 371 | (int)offset, RExC_precomp, RExC_precomp + offset); \ |
| 372 | } STMT_END |
| 373 | |
| 374 | /* |
| 375 | * Like Simple_vFAIL(), but accepts five arguments. |
| 376 | */ |
| 377 | #define Simple_vFAIL5(m, a1, a2, a3, a4) \ |
| 378 | STMT_START { \ |
| 379 | unsigned offset = strlen(RExC_precomp)-(RExC_end-RExC_parse); \ |
| 380 | S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, a3, a4,\ |
| 381 | (int)offset, RExC_precomp, RExC_precomp + offset); \ |
| 382 | } STMT_END |
| 383 | |
| 384 | |
| 385 | #define vWARN(loc,m) \ |
| 386 | STMT_START { \ |
| 387 | unsigned offset = strlen(RExC_precomp)-(RExC_end-(loc)); \ |
| 388 | Perl_warner(aTHX_ WARN_REGEXP, "%s" REPORT_LOCATION,\ |
| 389 | m, (int)offset, RExC_precomp, RExC_precomp + offset); \ |
| 390 | } STMT_END \ |
| 391 | |
| 392 | #define vWARNdep(loc,m) \ |
| 393 | STMT_START { \ |
| 394 | unsigned offset = strlen(RExC_precomp)-(RExC_end-(loc)); \ |
| 395 | int warn_cat = ckWARN(WARN_REGEXP) ? WARN_REGEXP : WARN_DEPRECATED; \ |
| 396 | Perl_warner(aTHX_ warn_cat, "%s" REPORT_LOCATION,\ |
| 397 | m, (int)offset, RExC_precomp, RExC_precomp + offset); \ |
| 398 | } STMT_END \ |
| 399 | |
| 400 | |
| 401 | #define vWARN2(loc, m, a1) \ |
| 402 | STMT_START { \ |
| 403 | unsigned offset = strlen(RExC_precomp)-(RExC_end-(loc)); \ |
| 404 | Perl_warner(aTHX_ WARN_REGEXP, m REPORT_LOCATION,\ |
| 405 | a1, \ |
| 406 | (int)offset, RExC_precomp, RExC_precomp + offset); \ |
| 407 | } STMT_END |
| 408 | |
| 409 | #define vWARN3(loc, m, a1, a2) \ |
| 410 | STMT_START { \ |
| 411 | unsigned offset = strlen(RExC_precomp) - (RExC_end - (loc)); \ |
| 412 | Perl_warner(aTHX_ WARN_REGEXP, m REPORT_LOCATION, \ |
| 413 | a1, a2, \ |
| 414 | (int)offset, RExC_precomp, RExC_precomp + offset); \ |
| 415 | } STMT_END |
| 416 | |
| 417 | #define vWARN4(loc, m, a1, a2, a3) \ |
| 418 | STMT_START { \ |
| 419 | unsigned offset = strlen(RExC_precomp)-(RExC_end-(loc)); \ |
| 420 | Perl_warner(aTHX_ WARN_REGEXP, m REPORT_LOCATION,\ |
| 421 | a1, a2, a3, \ |
| 422 | (int)offset, RExC_precomp, RExC_precomp + offset); \ |
| 423 | } STMT_END |
| 424 | |
| 425 | /* used for the parse_flags section for (?c) -- japhy */ |
| 426 | #define vWARN5(loc, m, a1, a2, a3, a4) \ |
| 427 | STMT_START { \ |
| 428 | unsigned offset = strlen(RExC_precomp)-(RExC_end-(loc)); \ |
| 429 | Perl_warner(aTHX_ WARN_REGEXP, m REPORT_LOCATION, \ |
| 430 | a1, a2, a3, a4, \ |
| 431 | (int)offset, RExC_precomp, RExC_precomp + offset); \ |
| 432 | } STMT_END |
| 433 | |
| 434 | |
| 435 | /* Allow for side effects in s */ |
| 436 | #define REGC(c,s) STMT_START { if (!SIZE_ONLY) *(s) = (c); else (void)(s);} STMT_END |
| 437 | |
| 438 | /* Macros for recording node offsets. 20001227 mjd@plover.com |
| 439 | * Nodes are numbered 1, 2, 3, 4. Node #n's position is recorded in |
| 440 | * element 2*n-1 of the array. Element #2n holds the byte length node #n. |
| 441 | * Element 0 holds the number n. |
| 442 | */ |
| 443 | |
| 444 | #define MJD_OFFSET_DEBUG(x) |
| 445 | /* #define MJD_OFFSET_DEBUG(x) fprintf x */ |
| 446 | |
| 447 | |
| 448 | # define Set_Node_Offset_To_R(node,byte) \ |
| 449 | STMT_START { \ |
| 450 | if (! SIZE_ONLY) { \ |
| 451 | if((node) < 0) { \ |
| 452 | Perl_croak(aTHX_ "value of node is %d in Offset macro", node); \ |
| 453 | } else { \ |
| 454 | RExC_offsets[2*(node)-1] = (byte); \ |
| 455 | } \ |
| 456 | } \ |
| 457 | } STMT_END |
| 458 | |
| 459 | # define Set_Node_Offset(node,byte) Set_Node_Offset_To_R((node)-RExC_emit_start, (byte)-RExC_start) |
| 460 | # define Set_Cur_Node_Offset Set_Node_Offset(RExC_emit, RExC_parse) |
| 461 | |
| 462 | # define Set_Node_Length_To_R(node,len) \ |
| 463 | STMT_START { \ |
| 464 | if (! SIZE_ONLY) { \ |
| 465 | MJD_OFFSET_DEBUG((stderr, "** (%d) size of node %d is %d.\n", __LINE__, (node), (len))); \ |
| 466 | if((node) < 0) { \ |
| 467 | Perl_croak(aTHX_ "value of node is %d in Length macro", node); \ |
| 468 | } else { \ |
| 469 | RExC_offsets[2*(node)] = (len); \ |
| 470 | } \ |
| 471 | } \ |
| 472 | } STMT_END |
| 473 | |
| 474 | # define Set_Node_Length(node,len) Set_Node_Length_To_R((node)-RExC_emit_start, len) |
| 475 | # define Set_Cur_Node_Length(len) Set_Node_Length(RExC_emit, len) |
| 476 | # define Set_Node_Cur_Length(node) Set_Node_Length(node, RExC_parse - parse_start) |
| 477 | |
| 478 | /* Get offsets and lengths */ |
| 479 | #define Node_Offset(n) (RExC_offsets[2*((n)-RExC_emit_start)-1]) |
| 480 | #define Node_Length(n) (RExC_offsets[2*((n)-RExC_emit_start)]) |
| 481 | |
| 482 | static void clear_re(pTHX_ void *r); |
| 483 | |
| 484 | /* Mark that we cannot extend a found fixed substring at this point. |
| 485 | Updata the longest found anchored substring and the longest found |
| 486 | floating substrings if needed. */ |
| 487 | |
| 488 | STATIC void |
| 489 | S_scan_commit(pTHX_ RExC_state_t *pRExC_state, scan_data_t *data) |
| 490 | { |
| 491 | STRLEN l = CHR_SVLEN(data->last_found); |
| 492 | STRLEN old_l = CHR_SVLEN(*data->longest); |
| 493 | |
| 494 | if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) { |
| 495 | sv_setsv(*data->longest, data->last_found); |
| 496 | if (*data->longest == data->longest_fixed) { |
| 497 | data->offset_fixed = l ? data->last_start_min : data->pos_min; |
| 498 | if (data->flags & SF_BEFORE_EOL) |
| 499 | data->flags |
| 500 | |= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL); |
| 501 | else |
| 502 | data->flags &= ~SF_FIX_BEFORE_EOL; |
| 503 | } |
| 504 | else { |
| 505 | data->offset_float_min = l ? data->last_start_min : data->pos_min; |
| 506 | data->offset_float_max = (l |
| 507 | ? data->last_start_max |
| 508 | : data->pos_min + data->pos_delta); |
| 509 | if (data->flags & SF_BEFORE_EOL) |
| 510 | data->flags |
| 511 | |= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL); |
| 512 | else |
| 513 | data->flags &= ~SF_FL_BEFORE_EOL; |
| 514 | } |
| 515 | } |
| 516 | SvCUR_set(data->last_found, 0); |
| 517 | data->last_end = -1; |
| 518 | data->flags &= ~SF_BEFORE_EOL; |
| 519 | } |
| 520 | |
| 521 | /* Can match anything (initialization) */ |
| 522 | STATIC void |
| 523 | S_cl_anything(pTHX_ RExC_state_t *pRExC_state, struct regnode_charclass_class *cl) |
| 524 | { |
| 525 | int value; |
| 526 | |
| 527 | ANYOF_CLASS_ZERO(cl); |
| 528 | for (value = 0; value < 256; ++value) |
| 529 | ANYOF_BITMAP_SET(cl, value); |
| 530 | cl->flags = ANYOF_EOS|ANYOF_UNICODE_ALL; |
| 531 | if (LOC) |
| 532 | cl->flags |= ANYOF_LOCALE; |
| 533 | } |
| 534 | |
| 535 | /* Can match anything (initialization) */ |
| 536 | STATIC int |
| 537 | S_cl_is_anything(pTHX_ struct regnode_charclass_class *cl) |
| 538 | { |
| 539 | int value; |
| 540 | |
| 541 | for (value = 0; value <= ANYOF_MAX; value += 2) |
| 542 | if (ANYOF_CLASS_TEST(cl, value) && ANYOF_CLASS_TEST(cl, value + 1)) |
| 543 | return 1; |
| 544 | if (!(cl->flags & ANYOF_UNICODE_ALL)) |
| 545 | return 0; |
| 546 | for (value = 0; value < 256; ++value) |
| 547 | if (!ANYOF_BITMAP_TEST(cl, value)) |
| 548 | return 0; |
| 549 | return 1; |
| 550 | } |
| 551 | |
| 552 | /* Can match anything (initialization) */ |
| 553 | STATIC void |
| 554 | S_cl_init(pTHX_ RExC_state_t *pRExC_state, struct regnode_charclass_class *cl) |
| 555 | { |
| 556 | Zero(cl, 1, struct regnode_charclass_class); |
| 557 | cl->type = ANYOF; |
| 558 | cl_anything(pRExC_state, cl); |
| 559 | } |
| 560 | |
| 561 | STATIC void |
| 562 | S_cl_init_zero(pTHX_ RExC_state_t *pRExC_state, struct regnode_charclass_class *cl) |
| 563 | { |
| 564 | Zero(cl, 1, struct regnode_charclass_class); |
| 565 | cl->type = ANYOF; |
| 566 | cl_anything(pRExC_state, cl); |
| 567 | if (LOC) |
| 568 | cl->flags |= ANYOF_LOCALE; |
| 569 | } |
| 570 | |
| 571 | /* 'And' a given class with another one. Can create false positives */ |
| 572 | /* We assume that cl is not inverted */ |
| 573 | STATIC void |
| 574 | S_cl_and(pTHX_ struct regnode_charclass_class *cl, |
| 575 | struct regnode_charclass_class *and_with) |
| 576 | { |
| 577 | if (!(and_with->flags & ANYOF_CLASS) |
| 578 | && !(cl->flags & ANYOF_CLASS) |
| 579 | && (and_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE) |
| 580 | && !(and_with->flags & ANYOF_FOLD) |
| 581 | && !(cl->flags & ANYOF_FOLD)) { |
| 582 | int i; |
| 583 | |
| 584 | if (and_with->flags & ANYOF_INVERT) |
| 585 | for (i = 0; i < ANYOF_BITMAP_SIZE; i++) |
| 586 | cl->bitmap[i] &= ~and_with->bitmap[i]; |
| 587 | else |
| 588 | for (i = 0; i < ANYOF_BITMAP_SIZE; i++) |
| 589 | cl->bitmap[i] &= and_with->bitmap[i]; |
| 590 | } /* XXXX: logic is complicated otherwise, leave it along for a moment. */ |
| 591 | if (!(and_with->flags & ANYOF_EOS)) |
| 592 | cl->flags &= ~ANYOF_EOS; |
| 593 | |
| 594 | if (cl->flags & ANYOF_UNICODE_ALL && and_with->flags & ANYOF_UNICODE) { |
| 595 | cl->flags &= ~ANYOF_UNICODE_ALL; |
| 596 | cl->flags |= ANYOF_UNICODE; |
| 597 | ARG_SET(cl, ARG(and_with)); |
| 598 | } |
| 599 | if (!(and_with->flags & ANYOF_UNICODE_ALL)) |
| 600 | cl->flags &= ~ANYOF_UNICODE_ALL; |
| 601 | if (!(and_with->flags & (ANYOF_UNICODE|ANYOF_UNICODE_ALL))) |
| 602 | cl->flags &= ~ANYOF_UNICODE; |
| 603 | } |
| 604 | |
| 605 | /* 'OR' a given class with another one. Can create false positives */ |
| 606 | /* We assume that cl is not inverted */ |
| 607 | STATIC void |
| 608 | S_cl_or(pTHX_ RExC_state_t *pRExC_state, struct regnode_charclass_class *cl, struct regnode_charclass_class *or_with) |
| 609 | { |
| 610 | if (or_with->flags & ANYOF_INVERT) { |
| 611 | /* We do not use |
| 612 | * (B1 | CL1) | (!B2 & !CL2) = (B1 | !B2 & !CL2) | (CL1 | (!B2 & !CL2)) |
| 613 | * <= (B1 | !B2) | (CL1 | !CL2) |
| 614 | * which is wasteful if CL2 is small, but we ignore CL2: |
| 615 | * (B1 | CL1) | (!B2 & !CL2) <= (B1 | CL1) | !B2 = (B1 | !B2) | CL1 |
| 616 | * XXXX Can we handle case-fold? Unclear: |
| 617 | * (OK1(i) | OK1(i')) | !(OK1(i) | OK1(i')) = |
| 618 | * (OK1(i) | OK1(i')) | (!OK1(i) & !OK1(i')) |
| 619 | */ |
| 620 | if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE) |
| 621 | && !(or_with->flags & ANYOF_FOLD) |
| 622 | && !(cl->flags & ANYOF_FOLD) ) { |
| 623 | int i; |
| 624 | |
| 625 | for (i = 0; i < ANYOF_BITMAP_SIZE; i++) |
| 626 | cl->bitmap[i] |= ~or_with->bitmap[i]; |
| 627 | } /* XXXX: logic is complicated otherwise */ |
| 628 | else { |
| 629 | cl_anything(pRExC_state, cl); |
| 630 | } |
| 631 | } else { |
| 632 | /* (B1 | CL1) | (B2 | CL2) = (B1 | B2) | (CL1 | CL2)) */ |
| 633 | if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE) |
| 634 | && (!(or_with->flags & ANYOF_FOLD) |
| 635 | || (cl->flags & ANYOF_FOLD)) ) { |
| 636 | int i; |
| 637 | |
| 638 | /* OR char bitmap and class bitmap separately */ |
| 639 | for (i = 0; i < ANYOF_BITMAP_SIZE; i++) |
| 640 | cl->bitmap[i] |= or_with->bitmap[i]; |
| 641 | if (or_with->flags & ANYOF_CLASS) { |
| 642 | for (i = 0; i < ANYOF_CLASSBITMAP_SIZE; i++) |
| 643 | cl->classflags[i] |= or_with->classflags[i]; |
| 644 | cl->flags |= ANYOF_CLASS; |
| 645 | } |
| 646 | } |
| 647 | else { /* XXXX: logic is complicated, leave it along for a moment. */ |
| 648 | cl_anything(pRExC_state, cl); |
| 649 | } |
| 650 | } |
| 651 | if (or_with->flags & ANYOF_EOS) |
| 652 | cl->flags |= ANYOF_EOS; |
| 653 | |
| 654 | if (cl->flags & ANYOF_UNICODE && or_with->flags & ANYOF_UNICODE && |
| 655 | ARG(cl) != ARG(or_with)) { |
| 656 | cl->flags |= ANYOF_UNICODE_ALL; |
| 657 | cl->flags &= ~ANYOF_UNICODE; |
| 658 | } |
| 659 | if (or_with->flags & ANYOF_UNICODE_ALL) { |
| 660 | cl->flags |= ANYOF_UNICODE_ALL; |
| 661 | cl->flags &= ~ANYOF_UNICODE; |
| 662 | } |
| 663 | } |
| 664 | |
| 665 | /* REx optimizer. Converts nodes into quickier variants "in place". |
| 666 | Finds fixed substrings. */ |
| 667 | |
| 668 | /* Stops at toplevel WHILEM as well as at `last'. At end *scanp is set |
| 669 | to the position after last scanned or to NULL. */ |
| 670 | |
| 671 | STATIC I32 |
| 672 | S_study_chunk(pTHX_ RExC_state_t *pRExC_state, regnode **scanp, I32 *deltap, regnode *last, scan_data_t *data, U32 flags) |
| 673 | /* scanp: Start here (read-write). */ |
| 674 | /* deltap: Write maxlen-minlen here. */ |
| 675 | /* last: Stop before this one. */ |
| 676 | { |
| 677 | I32 min = 0, pars = 0, code; |
| 678 | regnode *scan = *scanp, *next; |
| 679 | I32 delta = 0; |
| 680 | int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF); |
| 681 | int is_inf_internal = 0; /* The studied chunk is infinite */ |
| 682 | I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0; |
| 683 | scan_data_t data_fake; |
| 684 | struct regnode_charclass_class and_with; /* Valid if flags & SCF_DO_STCLASS_OR */ |
| 685 | |
| 686 | while (scan && OP(scan) != END && scan < last) { |
| 687 | /* Peephole optimizer: */ |
| 688 | |
| 689 | if (PL_regkind[(U8)OP(scan)] == EXACT) { |
| 690 | /* Merge several consecutive EXACTish nodes into one. */ |
| 691 | regnode *n = regnext(scan); |
| 692 | U32 stringok = 1; |
| 693 | #ifdef DEBUGGING |
| 694 | regnode *stop = scan; |
| 695 | #endif |
| 696 | |
| 697 | next = scan + NODE_SZ_STR(scan); |
| 698 | /* Skip NOTHING, merge EXACT*. */ |
| 699 | while (n && |
| 700 | ( PL_regkind[(U8)OP(n)] == NOTHING || |
| 701 | (stringok && (OP(n) == OP(scan)))) |
| 702 | && NEXT_OFF(n) |
| 703 | && NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) { |
| 704 | if (OP(n) == TAIL || n > next) |
| 705 | stringok = 0; |
| 706 | if (PL_regkind[(U8)OP(n)] == NOTHING) { |
| 707 | NEXT_OFF(scan) += NEXT_OFF(n); |
| 708 | next = n + NODE_STEP_REGNODE; |
| 709 | #ifdef DEBUGGING |
| 710 | if (stringok) |
| 711 | stop = n; |
| 712 | #endif |
| 713 | n = regnext(n); |
| 714 | } |
| 715 | else if (stringok) { |
| 716 | int oldl = STR_LEN(scan); |
| 717 | regnode *nnext = regnext(n); |
| 718 | |
| 719 | if (oldl + STR_LEN(n) > U8_MAX) |
| 720 | break; |
| 721 | NEXT_OFF(scan) += NEXT_OFF(n); |
| 722 | STR_LEN(scan) += STR_LEN(n); |
| 723 | next = n + NODE_SZ_STR(n); |
| 724 | /* Now we can overwrite *n : */ |
| 725 | Move(STRING(n), STRING(scan) + oldl, STR_LEN(n), char); |
| 726 | #ifdef DEBUGGING |
| 727 | stop = next - 1; |
| 728 | #endif |
| 729 | n = nnext; |
| 730 | } |
| 731 | } |
| 732 | #ifdef DEBUGGING |
| 733 | /* Allow dumping */ |
| 734 | n = scan + NODE_SZ_STR(scan); |
| 735 | while (n <= stop) { |
| 736 | if (PL_regkind[(U8)OP(n)] != NOTHING || OP(n) == NOTHING) { |
| 737 | OP(n) = OPTIMIZED; |
| 738 | NEXT_OFF(n) = 0; |
| 739 | } |
| 740 | n++; |
| 741 | } |
| 742 | #endif |
| 743 | } |
| 744 | /* Follow the next-chain of the current node and optimize |
| 745 | away all the NOTHINGs from it. */ |
| 746 | if (OP(scan) != CURLYX) { |
| 747 | int max = (reg_off_by_arg[OP(scan)] |
| 748 | ? I32_MAX |
| 749 | /* I32 may be smaller than U16 on CRAYs! */ |
| 750 | : (I32_MAX < U16_MAX ? I32_MAX : U16_MAX)); |
| 751 | int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan)); |
| 752 | int noff; |
| 753 | regnode *n = scan; |
| 754 | |
| 755 | /* Skip NOTHING and LONGJMP. */ |
| 756 | while ((n = regnext(n)) |
| 757 | && ((PL_regkind[(U8)OP(n)] == NOTHING && (noff = NEXT_OFF(n))) |
| 758 | || ((OP(n) == LONGJMP) && (noff = ARG(n)))) |
| 759 | && off + noff < max) |
| 760 | off += noff; |
| 761 | if (reg_off_by_arg[OP(scan)]) |
| 762 | ARG(scan) = off; |
| 763 | else |
| 764 | NEXT_OFF(scan) = off; |
| 765 | } |
| 766 | /* The principal pseudo-switch. Cannot be a switch, since we |
| 767 | look into several different things. */ |
| 768 | if (OP(scan) == BRANCH || OP(scan) == BRANCHJ |
| 769 | || OP(scan) == IFTHEN || OP(scan) == SUSPEND) { |
| 770 | next = regnext(scan); |
| 771 | code = OP(scan); |
| 772 | |
| 773 | if (OP(next) == code || code == IFTHEN || code == SUSPEND) { |
| 774 | I32 max1 = 0, min1 = I32_MAX, num = 0; |
| 775 | struct regnode_charclass_class accum; |
| 776 | |
| 777 | if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */ |
| 778 | scan_commit(pRExC_state, data); /* Cannot merge strings after this. */ |
| 779 | if (flags & SCF_DO_STCLASS) |
| 780 | cl_init_zero(pRExC_state, &accum); |
| 781 | while (OP(scan) == code) { |
| 782 | I32 deltanext, minnext, f = 0, fake; |
| 783 | struct regnode_charclass_class this_class; |
| 784 | |
| 785 | num++; |
| 786 | data_fake.flags = 0; |
| 787 | if (data) { |
| 788 | data_fake.whilem_c = data->whilem_c; |
| 789 | data_fake.last_closep = data->last_closep; |
| 790 | } |
| 791 | else |
| 792 | data_fake.last_closep = &fake; |
| 793 | next = regnext(scan); |
| 794 | scan = NEXTOPER(scan); |
| 795 | if (code != BRANCH) |
| 796 | scan = NEXTOPER(scan); |
| 797 | if (flags & SCF_DO_STCLASS) { |
| 798 | cl_init(pRExC_state, &this_class); |
| 799 | data_fake.start_class = &this_class; |
| 800 | f = SCF_DO_STCLASS_AND; |
| 801 | } |
| 802 | if (flags & SCF_WHILEM_VISITED_POS) |
| 803 | f |= SCF_WHILEM_VISITED_POS; |
| 804 | /* we suppose the run is continuous, last=next...*/ |
| 805 | minnext = study_chunk(pRExC_state, &scan, &deltanext, |
| 806 | next, &data_fake, f); |
| 807 | if (min1 > minnext) |
| 808 | min1 = minnext; |
| 809 | if (max1 < minnext + deltanext) |
| 810 | max1 = minnext + deltanext; |
| 811 | if (deltanext == I32_MAX) |
| 812 | is_inf = is_inf_internal = 1; |
| 813 | scan = next; |
| 814 | if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) |
| 815 | pars++; |
| 816 | if (data && (data_fake.flags & SF_HAS_EVAL)) |
| 817 | data->flags |= SF_HAS_EVAL; |
| 818 | if (data) |
| 819 | data->whilem_c = data_fake.whilem_c; |
| 820 | if (flags & SCF_DO_STCLASS) |
| 821 | cl_or(pRExC_state, &accum, &this_class); |
| 822 | if (code == SUSPEND) |
| 823 | break; |
| 824 | } |
| 825 | if (code == IFTHEN && num < 2) /* Empty ELSE branch */ |
| 826 | min1 = 0; |
| 827 | if (flags & SCF_DO_SUBSTR) { |
| 828 | data->pos_min += min1; |
| 829 | data->pos_delta += max1 - min1; |
| 830 | if (max1 != min1 || is_inf) |
| 831 | data->longest = &(data->longest_float); |
| 832 | } |
| 833 | min += min1; |
| 834 | delta += max1 - min1; |
| 835 | if (flags & SCF_DO_STCLASS_OR) { |
| 836 | cl_or(pRExC_state, data->start_class, &accum); |
| 837 | if (min1) { |
| 838 | cl_and(data->start_class, &and_with); |
| 839 | flags &= ~SCF_DO_STCLASS; |
| 840 | } |
| 841 | } |
| 842 | else if (flags & SCF_DO_STCLASS_AND) { |
| 843 | if (min1) { |
| 844 | cl_and(data->start_class, &accum); |
| 845 | flags &= ~SCF_DO_STCLASS; |
| 846 | } |
| 847 | else { |
| 848 | /* Switch to OR mode: cache the old value of |
| 849 | * data->start_class */ |
| 850 | StructCopy(data->start_class, &and_with, |
| 851 | struct regnode_charclass_class); |
| 852 | flags &= ~SCF_DO_STCLASS_AND; |
| 853 | StructCopy(&accum, data->start_class, |
| 854 | struct regnode_charclass_class); |
| 855 | flags |= SCF_DO_STCLASS_OR; |
| 856 | data->start_class->flags |= ANYOF_EOS; |
| 857 | } |
| 858 | } |
| 859 | } |
| 860 | else if (code == BRANCHJ) /* single branch is optimized. */ |
| 861 | scan = NEXTOPER(NEXTOPER(scan)); |
| 862 | else /* single branch is optimized. */ |
| 863 | scan = NEXTOPER(scan); |
| 864 | continue; |
| 865 | } |
| 866 | else if (OP(scan) == EXACT) { |
| 867 | I32 l = STR_LEN(scan); |
| 868 | UV uc = *((U8*)STRING(scan)); |
| 869 | if (UTF) { |
| 870 | U8 *s = (U8*)STRING(scan); |
| 871 | l = utf8_length(s, s + l); |
| 872 | uc = utf8_to_uvchr(s, NULL); |
| 873 | } |
| 874 | min += l; |
| 875 | if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */ |
| 876 | /* The code below prefers earlier match for fixed |
| 877 | offset, later match for variable offset. */ |
| 878 | if (data->last_end == -1) { /* Update the start info. */ |
| 879 | data->last_start_min = data->pos_min; |
| 880 | data->last_start_max = is_inf |
| 881 | ? I32_MAX : data->pos_min + data->pos_delta; |
| 882 | } |
| 883 | sv_catpvn(data->last_found, STRING(scan), STR_LEN(scan)); |
| 884 | data->last_end = data->pos_min + l; |
| 885 | data->pos_min += l; /* As in the first entry. */ |
| 886 | data->flags &= ~SF_BEFORE_EOL; |
| 887 | } |
| 888 | if (flags & SCF_DO_STCLASS_AND) { |
| 889 | /* Check whether it is compatible with what we know already! */ |
| 890 | int compat = 1; |
| 891 | |
| 892 | if (uc >= 0x100 || |
| 893 | (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE)) |
| 894 | && !ANYOF_BITMAP_TEST(data->start_class, uc) |
| 895 | && (!(data->start_class->flags & ANYOF_FOLD) |
| 896 | || !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc]))) |
| 897 | ) |
| 898 | compat = 0; |
| 899 | ANYOF_CLASS_ZERO(data->start_class); |
| 900 | ANYOF_BITMAP_ZERO(data->start_class); |
| 901 | if (compat) |
| 902 | ANYOF_BITMAP_SET(data->start_class, uc); |
| 903 | data->start_class->flags &= ~ANYOF_EOS; |
| 904 | if (uc < 0x100) |
| 905 | data->start_class->flags &= ~ANYOF_UNICODE_ALL; |
| 906 | } |
| 907 | else if (flags & SCF_DO_STCLASS_OR) { |
| 908 | /* false positive possible if the class is case-folded */ |
| 909 | if (uc < 0x100) |
| 910 | ANYOF_BITMAP_SET(data->start_class, uc); |
| 911 | else |
| 912 | data->start_class->flags |= ANYOF_UNICODE_ALL; |
| 913 | data->start_class->flags &= ~ANYOF_EOS; |
| 914 | cl_and(data->start_class, &and_with); |
| 915 | } |
| 916 | flags &= ~SCF_DO_STCLASS; |
| 917 | } |
| 918 | else if (PL_regkind[(U8)OP(scan)] == EXACT) { /* But OP != EXACT! */ |
| 919 | I32 l = STR_LEN(scan); |
| 920 | UV uc = *((U8*)STRING(scan)); |
| 921 | |
| 922 | /* Search for fixed substrings supports EXACT only. */ |
| 923 | if (flags & SCF_DO_SUBSTR) |
| 924 | scan_commit(pRExC_state, data); |
| 925 | if (UTF) { |
| 926 | U8 *s = (U8 *)STRING(scan); |
| 927 | l = utf8_length(s, s + l); |
| 928 | uc = utf8_to_uvchr(s, NULL); |
| 929 | } |
| 930 | min += l; |
| 931 | if (data && (flags & SCF_DO_SUBSTR)) |
| 932 | data->pos_min += l; |
| 933 | if (flags & SCF_DO_STCLASS_AND) { |
| 934 | /* Check whether it is compatible with what we know already! */ |
| 935 | int compat = 1; |
| 936 | |
| 937 | if (uc >= 0x100 || |
| 938 | (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE)) |
| 939 | && !ANYOF_BITMAP_TEST(data->start_class, uc) |
| 940 | && !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc]))) |
| 941 | compat = 0; |
| 942 | ANYOF_CLASS_ZERO(data->start_class); |
| 943 | ANYOF_BITMAP_ZERO(data->start_class); |
| 944 | if (compat) { |
| 945 | ANYOF_BITMAP_SET(data->start_class, uc); |
| 946 | data->start_class->flags &= ~ANYOF_EOS; |
| 947 | data->start_class->flags |= ANYOF_FOLD; |
| 948 | if (OP(scan) == EXACTFL) |
| 949 | data->start_class->flags |= ANYOF_LOCALE; |
| 950 | } |
| 951 | } |
| 952 | else if (flags & SCF_DO_STCLASS_OR) { |
| 953 | if (data->start_class->flags & ANYOF_FOLD) { |
| 954 | /* false positive possible if the class is case-folded. |
| 955 | Assume that the locale settings are the same... */ |
| 956 | if (uc < 0x100) |
| 957 | ANYOF_BITMAP_SET(data->start_class, uc); |
| 958 | data->start_class->flags &= ~ANYOF_EOS; |
| 959 | } |
| 960 | cl_and(data->start_class, &and_with); |
| 961 | } |
| 962 | flags &= ~SCF_DO_STCLASS; |
| 963 | } |
| 964 | else if (strchr((char*)PL_varies,OP(scan))) { |
| 965 | I32 mincount, maxcount, minnext, deltanext, fl = 0; |
| 966 | I32 f = flags, pos_before = 0; |
| 967 | regnode *oscan = scan; |
| 968 | struct regnode_charclass_class this_class; |
| 969 | struct regnode_charclass_class *oclass = NULL; |
| 970 | |
| 971 | switch (PL_regkind[(U8)OP(scan)]) { |
| 972 | case WHILEM: /* End of (?:...)* . */ |
| 973 | scan = NEXTOPER(scan); |
| 974 | goto finish; |
| 975 | case PLUS: |
| 976 | if (flags & (SCF_DO_SUBSTR | SCF_DO_STCLASS)) { |
| 977 | next = NEXTOPER(scan); |
| 978 | if (OP(next) == EXACT || (flags & SCF_DO_STCLASS)) { |
| 979 | mincount = 1; |
| 980 | maxcount = REG_INFTY; |
| 981 | next = regnext(scan); |
| 982 | scan = NEXTOPER(scan); |
| 983 | goto do_curly; |
| 984 | } |
| 985 | } |
| 986 | if (flags & SCF_DO_SUBSTR) |
| 987 | data->pos_min++; |
| 988 | min++; |
| 989 | /* Fall through. */ |
| 990 | case STAR: |
| 991 | if (flags & SCF_DO_STCLASS) { |
| 992 | mincount = 0; |
| 993 | maxcount = REG_INFTY; |
| 994 | next = regnext(scan); |
| 995 | scan = NEXTOPER(scan); |
| 996 | goto do_curly; |
| 997 | } |
| 998 | is_inf = is_inf_internal = 1; |
| 999 | scan = regnext(scan); |
| 1000 | if (flags & SCF_DO_SUBSTR) { |
| 1001 | scan_commit(pRExC_state, data); /* Cannot extend fixed substrings */ |
| 1002 | data->longest = &(data->longest_float); |
| 1003 | } |
| 1004 | goto optimize_curly_tail; |
| 1005 | case CURLY: |
| 1006 | mincount = ARG1(scan); |
| 1007 | maxcount = ARG2(scan); |
| 1008 | next = regnext(scan); |
| 1009 | if (OP(scan) == CURLYX) { |
| 1010 | I32 lp = (data ? *(data->last_closep) : 0); |
| 1011 | |
| 1012 | scan->flags = ((lp <= U8_MAX) ? lp : U8_MAX); |
| 1013 | } |
| 1014 | scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS; |
| 1015 | do_curly: |
| 1016 | if (flags & SCF_DO_SUBSTR) { |
| 1017 | if (mincount == 0) scan_commit(pRExC_state,data); /* Cannot extend fixed substrings */ |
| 1018 | pos_before = data->pos_min; |
| 1019 | } |
| 1020 | if (data) { |
| 1021 | fl = data->flags; |
| 1022 | data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL); |
| 1023 | if (is_inf) |
| 1024 | data->flags |= SF_IS_INF; |
| 1025 | } |
| 1026 | if (flags & SCF_DO_STCLASS) { |
| 1027 | cl_init(pRExC_state, &this_class); |
| 1028 | oclass = data->start_class; |
| 1029 | data->start_class = &this_class; |
| 1030 | f |= SCF_DO_STCLASS_AND; |
| 1031 | f &= ~SCF_DO_STCLASS_OR; |
| 1032 | } |
| 1033 | /* These are the cases when once a subexpression |
| 1034 | fails at a particular position, it cannot succeed |
| 1035 | even after backtracking at the enclosing scope. |
| 1036 | |
| 1037 | XXXX what if minimal match and we are at the |
| 1038 | initial run of {n,m}? */ |
| 1039 | if ((mincount != maxcount - 1) && (maxcount != REG_INFTY)) |
| 1040 | f &= ~SCF_WHILEM_VISITED_POS; |
| 1041 | |
| 1042 | /* This will finish on WHILEM, setting scan, or on NULL: */ |
| 1043 | minnext = study_chunk(pRExC_state, &scan, &deltanext, last, data, |
| 1044 | mincount == 0 |
| 1045 | ? (f & ~SCF_DO_SUBSTR) : f); |
| 1046 | |
| 1047 | if (flags & SCF_DO_STCLASS) |
| 1048 | data->start_class = oclass; |
| 1049 | if (mincount == 0 || minnext == 0) { |
| 1050 | if (flags & SCF_DO_STCLASS_OR) { |
| 1051 | cl_or(pRExC_state, data->start_class, &this_class); |
| 1052 | } |
| 1053 | else if (flags & SCF_DO_STCLASS_AND) { |
| 1054 | /* Switch to OR mode: cache the old value of |
| 1055 | * data->start_class */ |
| 1056 | StructCopy(data->start_class, &and_with, |
| 1057 | struct regnode_charclass_class); |
| 1058 | flags &= ~SCF_DO_STCLASS_AND; |
| 1059 | StructCopy(&this_class, data->start_class, |
| 1060 | struct regnode_charclass_class); |
| 1061 | flags |= SCF_DO_STCLASS_OR; |
| 1062 | data->start_class->flags |= ANYOF_EOS; |
| 1063 | } |
| 1064 | } else { /* Non-zero len */ |
| 1065 | if (flags & SCF_DO_STCLASS_OR) { |
| 1066 | cl_or(pRExC_state, data->start_class, &this_class); |
| 1067 | cl_and(data->start_class, &and_with); |
| 1068 | } |
| 1069 | else if (flags & SCF_DO_STCLASS_AND) |
| 1070 | cl_and(data->start_class, &this_class); |
| 1071 | flags &= ~SCF_DO_STCLASS; |
| 1072 | } |
| 1073 | if (!scan) /* It was not CURLYX, but CURLY. */ |
| 1074 | scan = next; |
| 1075 | if (ckWARN(WARN_REGEXP) |
| 1076 | && (minnext == 0) && (deltanext == 0) |
| 1077 | && data && !(data->flags & (SF_HAS_PAR|SF_IN_PAR)) |
| 1078 | && maxcount <= REG_INFTY/3) /* Complement check for big count */ |
| 1079 | { |
| 1080 | vWARN(RExC_parse, |
| 1081 | "Quantifier unexpected on zero-length expression"); |
| 1082 | } |
| 1083 | |
| 1084 | min += minnext * mincount; |
| 1085 | is_inf_internal |= ((maxcount == REG_INFTY |
| 1086 | && (minnext + deltanext) > 0) |
| 1087 | || deltanext == I32_MAX); |
| 1088 | is_inf |= is_inf_internal; |
| 1089 | delta += (minnext + deltanext) * maxcount - minnext * mincount; |
| 1090 | |
| 1091 | /* Try powerful optimization CURLYX => CURLYN. */ |
| 1092 | if ( OP(oscan) == CURLYX && data |
| 1093 | && data->flags & SF_IN_PAR |
| 1094 | && !(data->flags & SF_HAS_EVAL) |
| 1095 | && !deltanext && minnext == 1 ) { |
| 1096 | /* Try to optimize to CURLYN. */ |
| 1097 | regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; |
| 1098 | regnode *nxt1 = nxt; |
| 1099 | #ifdef DEBUGGING |
| 1100 | regnode *nxt2; |
| 1101 | #endif |
| 1102 | |
| 1103 | /* Skip open. */ |
| 1104 | nxt = regnext(nxt); |
| 1105 | if (!strchr((char*)PL_simple,OP(nxt)) |
| 1106 | && !(PL_regkind[(U8)OP(nxt)] == EXACT |
| 1107 | && STR_LEN(nxt) == 1)) |
| 1108 | goto nogo; |
| 1109 | #ifdef DEBUGGING |
| 1110 | nxt2 = nxt; |
| 1111 | #endif |
| 1112 | nxt = regnext(nxt); |
| 1113 | if (OP(nxt) != CLOSE) |
| 1114 | goto nogo; |
| 1115 | /* Now we know that nxt2 is the only contents: */ |
| 1116 | oscan->flags = ARG(nxt); |
| 1117 | OP(oscan) = CURLYN; |
| 1118 | OP(nxt1) = NOTHING; /* was OPEN. */ |
| 1119 | #ifdef DEBUGGING |
| 1120 | OP(nxt1 + 1) = OPTIMIZED; /* was count. */ |
| 1121 | NEXT_OFF(nxt1+ 1) = 0; /* just for consistancy. */ |
| 1122 | NEXT_OFF(nxt2) = 0; /* just for consistancy with CURLY. */ |
| 1123 | OP(nxt) = OPTIMIZED; /* was CLOSE. */ |
| 1124 | OP(nxt + 1) = OPTIMIZED; /* was count. */ |
| 1125 | NEXT_OFF(nxt+ 1) = 0; /* just for consistancy. */ |
| 1126 | #endif |
| 1127 | } |
| 1128 | nogo: |
| 1129 | |
| 1130 | /* Try optimization CURLYX => CURLYM. */ |
| 1131 | if ( OP(oscan) == CURLYX && data |
| 1132 | && !(data->flags & SF_HAS_PAR) |
| 1133 | && !(data->flags & SF_HAS_EVAL) |
| 1134 | && !deltanext ) { |
| 1135 | /* XXXX How to optimize if data == 0? */ |
| 1136 | /* Optimize to a simpler form. */ |
| 1137 | regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN */ |
| 1138 | regnode *nxt2; |
| 1139 | |
| 1140 | OP(oscan) = CURLYM; |
| 1141 | while ( (nxt2 = regnext(nxt)) /* skip over embedded stuff*/ |
| 1142 | && (OP(nxt2) != WHILEM)) |
| 1143 | nxt = nxt2; |
| 1144 | OP(nxt2) = SUCCEED; /* Whas WHILEM */ |
| 1145 | /* Need to optimize away parenths. */ |
| 1146 | if (data->flags & SF_IN_PAR) { |
| 1147 | /* Set the parenth number. */ |
| 1148 | regnode *nxt1 = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN*/ |
| 1149 | |
| 1150 | if (OP(nxt) != CLOSE) |
| 1151 | FAIL("Panic opt close"); |
| 1152 | oscan->flags = ARG(nxt); |
| 1153 | OP(nxt1) = OPTIMIZED; /* was OPEN. */ |
| 1154 | OP(nxt) = OPTIMIZED; /* was CLOSE. */ |
| 1155 | #ifdef DEBUGGING |
| 1156 | OP(nxt1 + 1) = OPTIMIZED; /* was count. */ |
| 1157 | OP(nxt + 1) = OPTIMIZED; /* was count. */ |
| 1158 | NEXT_OFF(nxt1 + 1) = 0; /* just for consistancy. */ |
| 1159 | NEXT_OFF(nxt + 1) = 0; /* just for consistancy. */ |
| 1160 | #endif |
| 1161 | #if 0 |
| 1162 | while ( nxt1 && (OP(nxt1) != WHILEM)) { |
| 1163 | regnode *nnxt = regnext(nxt1); |
| 1164 | |
| 1165 | if (nnxt == nxt) { |
| 1166 | if (reg_off_by_arg[OP(nxt1)]) |
| 1167 | ARG_SET(nxt1, nxt2 - nxt1); |
| 1168 | else if (nxt2 - nxt1 < U16_MAX) |
| 1169 | NEXT_OFF(nxt1) = nxt2 - nxt1; |
| 1170 | else |
| 1171 | OP(nxt) = NOTHING; /* Cannot beautify */ |
| 1172 | } |
| 1173 | nxt1 = nnxt; |
| 1174 | } |
| 1175 | #endif |
| 1176 | /* Optimize again: */ |
| 1177 | study_chunk(pRExC_state, &nxt1, &deltanext, nxt, |
| 1178 | NULL, 0); |
| 1179 | } |
| 1180 | else |
| 1181 | oscan->flags = 0; |
| 1182 | } |
| 1183 | else if ((OP(oscan) == CURLYX) |
| 1184 | && (flags & SCF_WHILEM_VISITED_POS) |
| 1185 | /* See the comment on a similar expression above. |
| 1186 | However, this time it not a subexpression |
| 1187 | we care about, but the expression itself. */ |
| 1188 | && (maxcount == REG_INFTY) |
| 1189 | && data && ++data->whilem_c < 16) { |
| 1190 | /* This stays as CURLYX, we can put the count/of pair. */ |
| 1191 | /* Find WHILEM (as in regexec.c) */ |
| 1192 | regnode *nxt = oscan + NEXT_OFF(oscan); |
| 1193 | |
| 1194 | if (OP(PREVOPER(nxt)) == NOTHING) /* LONGJMP */ |
| 1195 | nxt += ARG(nxt); |
| 1196 | PREVOPER(nxt)->flags = data->whilem_c |
| 1197 | | (RExC_whilem_seen << 4); /* On WHILEM */ |
| 1198 | } |
| 1199 | if (data && fl & (SF_HAS_PAR|SF_IN_PAR)) |
| 1200 | pars++; |
| 1201 | if (flags & SCF_DO_SUBSTR) { |
| 1202 | SV *last_str = Nullsv; |
| 1203 | int counted = mincount != 0; |
| 1204 | |
| 1205 | if (data->last_end > 0 && mincount != 0) { /* Ends with a string. */ |
| 1206 | I32 b = pos_before >= data->last_start_min |
| 1207 | ? pos_before : data->last_start_min; |
| 1208 | STRLEN l; |
| 1209 | char *s = SvPV(data->last_found, l); |
| 1210 | I32 old = b - data->last_start_min; |
| 1211 | |
| 1212 | if (UTF) |
| 1213 | old = utf8_hop((U8*)s, old) - (U8*)s; |
| 1214 | |
| 1215 | l -= old; |
| 1216 | /* Get the added string: */ |
| 1217 | last_str = newSVpvn(s + old, l); |
| 1218 | if (deltanext == 0 && pos_before == b) { |
| 1219 | /* What was added is a constant string */ |
| 1220 | if (mincount > 1) { |
| 1221 | SvGROW(last_str, (mincount * l) + 1); |
| 1222 | repeatcpy(SvPVX(last_str) + l, |
| 1223 | SvPVX(last_str), l, mincount - 1); |
| 1224 | SvCUR(last_str) *= mincount; |
| 1225 | /* Add additional parts. */ |
| 1226 | SvCUR_set(data->last_found, |
| 1227 | SvCUR(data->last_found) - l); |
| 1228 | sv_catsv(data->last_found, last_str); |
| 1229 | data->last_end += l * (mincount - 1); |
| 1230 | } |
| 1231 | } else { |
| 1232 | /* start offset must point into the last copy */ |
| 1233 | data->last_start_min += minnext * (mincount - 1); |
| 1234 | data->last_start_max += is_inf ? 0 : (maxcount - 1) |
| 1235 | * (minnext + data->pos_delta); |
| 1236 | } |
| 1237 | } |
| 1238 | /* It is counted once already... */ |
| 1239 | data->pos_min += minnext * (mincount - counted); |
| 1240 | data->pos_delta += - counted * deltanext + |
| 1241 | (minnext + deltanext) * maxcount - minnext * mincount; |
| 1242 | if (mincount != maxcount) { |
| 1243 | /* Cannot extend fixed substrings found inside |
| 1244 | the group. */ |
| 1245 | scan_commit(pRExC_state,data); |
| 1246 | if (mincount && last_str) { |
| 1247 | sv_setsv(data->last_found, last_str); |
| 1248 | data->last_end = data->pos_min; |
| 1249 | data->last_start_min = |
| 1250 | data->pos_min - CHR_SVLEN(last_str); |
| 1251 | data->last_start_max = is_inf |
| 1252 | ? I32_MAX |
| 1253 | : data->pos_min + data->pos_delta |
| 1254 | - CHR_SVLEN(last_str); |
| 1255 | } |
| 1256 | data->longest = &(data->longest_float); |
| 1257 | } |
| 1258 | SvREFCNT_dec(last_str); |
| 1259 | } |
| 1260 | if (data && (fl & SF_HAS_EVAL)) |
| 1261 | data->flags |= SF_HAS_EVAL; |
| 1262 | optimize_curly_tail: |
| 1263 | if (OP(oscan) != CURLYX) { |
| 1264 | while (PL_regkind[(U8)OP(next = regnext(oscan))] == NOTHING |
| 1265 | && NEXT_OFF(next)) |
| 1266 | NEXT_OFF(oscan) += NEXT_OFF(next); |
| 1267 | } |
| 1268 | continue; |
| 1269 | default: /* REF and CLUMP only? */ |
| 1270 | if (flags & SCF_DO_SUBSTR) { |
| 1271 | scan_commit(pRExC_state,data); /* Cannot expect anything... */ |
| 1272 | data->longest = &(data->longest_float); |
| 1273 | } |
| 1274 | is_inf = is_inf_internal = 1; |
| 1275 | if (flags & SCF_DO_STCLASS_OR) |
| 1276 | cl_anything(pRExC_state, data->start_class); |
| 1277 | flags &= ~SCF_DO_STCLASS; |
| 1278 | break; |
| 1279 | } |
| 1280 | } |
| 1281 | else if (strchr((char*)PL_simple,OP(scan))) { |
| 1282 | int value = 0; |
| 1283 | |
| 1284 | if (flags & SCF_DO_SUBSTR) { |
| 1285 | scan_commit(pRExC_state,data); |
| 1286 | data->pos_min++; |
| 1287 | } |
| 1288 | min++; |
| 1289 | if (flags & SCF_DO_STCLASS) { |
| 1290 | data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */ |
| 1291 | |
| 1292 | /* Some of the logic below assumes that switching |
| 1293 | locale on will only add false positives. */ |
| 1294 | switch (PL_regkind[(U8)OP(scan)]) { |
| 1295 | case SANY: |
| 1296 | default: |
| 1297 | do_default: |
| 1298 | /* Perl_croak(aTHX_ "panic: unexpected simple REx opcode %d", OP(scan)); */ |
| 1299 | if (flags & SCF_DO_STCLASS_OR) /* Allow everything */ |
| 1300 | cl_anything(pRExC_state, data->start_class); |
| 1301 | break; |
| 1302 | case REG_ANY: |
| 1303 | if (OP(scan) == SANY) |
| 1304 | goto do_default; |
| 1305 | if (flags & SCF_DO_STCLASS_OR) { /* Everything but \n */ |
| 1306 | value = (ANYOF_BITMAP_TEST(data->start_class,'\n') |
| 1307 | || (data->start_class->flags & ANYOF_CLASS)); |
| 1308 | cl_anything(pRExC_state, data->start_class); |
| 1309 | } |
| 1310 | if (flags & SCF_DO_STCLASS_AND || !value) |
| 1311 | ANYOF_BITMAP_CLEAR(data->start_class,'\n'); |
| 1312 | break; |
| 1313 | case ANYOF: |
| 1314 | if (flags & SCF_DO_STCLASS_AND) |
| 1315 | cl_and(data->start_class, |
| 1316 | (struct regnode_charclass_class*)scan); |
| 1317 | else |
| 1318 | cl_or(pRExC_state, data->start_class, |
| 1319 | (struct regnode_charclass_class*)scan); |
| 1320 | break; |
| 1321 | case ALNUM: |
| 1322 | if (flags & SCF_DO_STCLASS_AND) { |
| 1323 | if (!(data->start_class->flags & ANYOF_LOCALE)) { |
| 1324 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM); |
| 1325 | for (value = 0; value < 256; value++) |
| 1326 | if (!isALNUM(value)) |
| 1327 | ANYOF_BITMAP_CLEAR(data->start_class, value); |
| 1328 | } |
| 1329 | } |
| 1330 | else { |
| 1331 | if (data->start_class->flags & ANYOF_LOCALE) |
| 1332 | ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM); |
| 1333 | else { |
| 1334 | for (value = 0; value < 256; value++) |
| 1335 | if (isALNUM(value)) |
| 1336 | ANYOF_BITMAP_SET(data->start_class, value); |
| 1337 | } |
| 1338 | } |
| 1339 | break; |
| 1340 | case ALNUML: |
| 1341 | if (flags & SCF_DO_STCLASS_AND) { |
| 1342 | if (data->start_class->flags & ANYOF_LOCALE) |
| 1343 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM); |
| 1344 | } |
| 1345 | else { |
| 1346 | ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM); |
| 1347 | data->start_class->flags |= ANYOF_LOCALE; |
| 1348 | } |
| 1349 | break; |
| 1350 | case NALNUM: |
| 1351 | if (flags & SCF_DO_STCLASS_AND) { |
| 1352 | if (!(data->start_class->flags & ANYOF_LOCALE)) { |
| 1353 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM); |
| 1354 | for (value = 0; value < 256; value++) |
| 1355 | if (isALNUM(value)) |
| 1356 | ANYOF_BITMAP_CLEAR(data->start_class, value); |
| 1357 | } |
| 1358 | } |
| 1359 | else { |
| 1360 | if (data->start_class->flags & ANYOF_LOCALE) |
| 1361 | ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM); |
| 1362 | else { |
| 1363 | for (value = 0; value < 256; value++) |
| 1364 | if (!isALNUM(value)) |
| 1365 | ANYOF_BITMAP_SET(data->start_class, value); |
| 1366 | } |
| 1367 | } |
| 1368 | break; |
| 1369 | case NALNUML: |
| 1370 | if (flags & SCF_DO_STCLASS_AND) { |
| 1371 | if (data->start_class->flags & ANYOF_LOCALE) |
| 1372 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM); |
| 1373 | } |
| 1374 | else { |
| 1375 | data->start_class->flags |= ANYOF_LOCALE; |
| 1376 | ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM); |
| 1377 | } |
| 1378 | break; |
| 1379 | case SPACE: |
| 1380 | if (flags & SCF_DO_STCLASS_AND) { |
| 1381 | if (!(data->start_class->flags & ANYOF_LOCALE)) { |
| 1382 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE); |
| 1383 | for (value = 0; value < 256; value++) |
| 1384 | if (!isSPACE(value)) |
| 1385 | ANYOF_BITMAP_CLEAR(data->start_class, value); |
| 1386 | } |
| 1387 | } |
| 1388 | else { |
| 1389 | if (data->start_class->flags & ANYOF_LOCALE) |
| 1390 | ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE); |
| 1391 | else { |
| 1392 | for (value = 0; value < 256; value++) |
| 1393 | if (isSPACE(value)) |
| 1394 | ANYOF_BITMAP_SET(data->start_class, value); |
| 1395 | } |
| 1396 | } |
| 1397 | break; |
| 1398 | case SPACEL: |
| 1399 | if (flags & SCF_DO_STCLASS_AND) { |
| 1400 | if (data->start_class->flags & ANYOF_LOCALE) |
| 1401 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE); |
| 1402 | } |
| 1403 | else { |
| 1404 | data->start_class->flags |= ANYOF_LOCALE; |
| 1405 | ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE); |
| 1406 | } |
| 1407 | break; |
| 1408 | case NSPACE: |
| 1409 | if (flags & SCF_DO_STCLASS_AND) { |
| 1410 | if (!(data->start_class->flags & ANYOF_LOCALE)) { |
| 1411 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE); |
| 1412 | for (value = 0; value < 256; value++) |
| 1413 | if (isSPACE(value)) |
| 1414 | ANYOF_BITMAP_CLEAR(data->start_class, value); |
| 1415 | } |
| 1416 | } |
| 1417 | else { |
| 1418 | if (data->start_class->flags & ANYOF_LOCALE) |
| 1419 | ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE); |
| 1420 | else { |
| 1421 | for (value = 0; value < 256; value++) |
| 1422 | if (!isSPACE(value)) |
| 1423 | ANYOF_BITMAP_SET(data->start_class, value); |
| 1424 | } |
| 1425 | } |
| 1426 | break; |
| 1427 | case NSPACEL: |
| 1428 | if (flags & SCF_DO_STCLASS_AND) { |
| 1429 | if (data->start_class->flags & ANYOF_LOCALE) { |
| 1430 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE); |
| 1431 | for (value = 0; value < 256; value++) |
| 1432 | if (!isSPACE(value)) |
| 1433 | ANYOF_BITMAP_CLEAR(data->start_class, value); |
| 1434 | } |
| 1435 | } |
| 1436 | else { |
| 1437 | data->start_class->flags |= ANYOF_LOCALE; |
| 1438 | ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE); |
| 1439 | } |
| 1440 | break; |
| 1441 | case DIGIT: |
| 1442 | if (flags & SCF_DO_STCLASS_AND) { |
| 1443 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NDIGIT); |
| 1444 | for (value = 0; value < 256; value++) |
| 1445 | if (!isDIGIT(value)) |
| 1446 | ANYOF_BITMAP_CLEAR(data->start_class, value); |
| 1447 | } |
| 1448 | else { |
| 1449 | if (data->start_class->flags & ANYOF_LOCALE) |
| 1450 | ANYOF_CLASS_SET(data->start_class,ANYOF_DIGIT); |
| 1451 | else { |
| 1452 | for (value = 0; value < 256; value++) |
| 1453 | if (isDIGIT(value)) |
| 1454 | ANYOF_BITMAP_SET(data->start_class, value); |
| 1455 | } |
| 1456 | } |
| 1457 | break; |
| 1458 | case NDIGIT: |
| 1459 | if (flags & SCF_DO_STCLASS_AND) { |
| 1460 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_DIGIT); |
| 1461 | for (value = 0; value < 256; value++) |
| 1462 | if (isDIGIT(value)) |
| 1463 | ANYOF_BITMAP_CLEAR(data->start_class, value); |
| 1464 | } |
| 1465 | else { |
| 1466 | if (data->start_class->flags & ANYOF_LOCALE) |
| 1467 | ANYOF_CLASS_SET(data->start_class,ANYOF_NDIGIT); |
| 1468 | else { |
| 1469 | for (value = 0; value < 256; value++) |
| 1470 | if (!isDIGIT(value)) |
| 1471 | ANYOF_BITMAP_SET(data->start_class, value); |
| 1472 | } |
| 1473 | } |
| 1474 | break; |
| 1475 | } |
| 1476 | if (flags & SCF_DO_STCLASS_OR) |
| 1477 | cl_and(data->start_class, &and_with); |
| 1478 | flags &= ~SCF_DO_STCLASS; |
| 1479 | } |
| 1480 | } |
| 1481 | else if (PL_regkind[(U8)OP(scan)] == EOL && flags & SCF_DO_SUBSTR) { |
| 1482 | data->flags |= (OP(scan) == MEOL |
| 1483 | ? SF_BEFORE_MEOL |
| 1484 | : SF_BEFORE_SEOL); |
| 1485 | } |
| 1486 | else if ( PL_regkind[(U8)OP(scan)] == BRANCHJ |
| 1487 | /* Lookbehind, or need to calculate parens/evals/stclass: */ |
| 1488 | && (scan->flags || data || (flags & SCF_DO_STCLASS)) |
| 1489 | && (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) { |
| 1490 | /* Lookahead/lookbehind */ |
| 1491 | I32 deltanext, minnext, fake = 0; |
| 1492 | regnode *nscan; |
| 1493 | struct regnode_charclass_class intrnl; |
| 1494 | int f = 0; |
| 1495 | |
| 1496 | data_fake.flags = 0; |
| 1497 | if (data) { |
| 1498 | data_fake.whilem_c = data->whilem_c; |
| 1499 | data_fake.last_closep = data->last_closep; |
| 1500 | } |
| 1501 | else |
| 1502 | data_fake.last_closep = &fake; |
| 1503 | if ( flags & SCF_DO_STCLASS && !scan->flags |
| 1504 | && OP(scan) == IFMATCH ) { /* Lookahead */ |
| 1505 | cl_init(pRExC_state, &intrnl); |
| 1506 | data_fake.start_class = &intrnl; |
| 1507 | f |= SCF_DO_STCLASS_AND; |
| 1508 | } |
| 1509 | if (flags & SCF_WHILEM_VISITED_POS) |
| 1510 | f |= SCF_WHILEM_VISITED_POS; |
| 1511 | next = regnext(scan); |
| 1512 | nscan = NEXTOPER(NEXTOPER(scan)); |
| 1513 | minnext = study_chunk(pRExC_state, &nscan, &deltanext, last, &data_fake, f); |
| 1514 | if (scan->flags) { |
| 1515 | if (deltanext) { |
| 1516 | vFAIL("Variable length lookbehind not implemented"); |
| 1517 | } |
| 1518 | else if (minnext > U8_MAX) { |
| 1519 | vFAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX); |
| 1520 | } |
| 1521 | scan->flags = minnext; |
| 1522 | } |
| 1523 | if (data && data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) |
| 1524 | pars++; |
| 1525 | if (data && (data_fake.flags & SF_HAS_EVAL)) |
| 1526 | data->flags |= SF_HAS_EVAL; |
| 1527 | if (data) |
| 1528 | data->whilem_c = data_fake.whilem_c; |
| 1529 | if (f & SCF_DO_STCLASS_AND) { |
| 1530 | int was = (data->start_class->flags & ANYOF_EOS); |
| 1531 | |
| 1532 | cl_and(data->start_class, &intrnl); |
| 1533 | if (was) |
| 1534 | data->start_class->flags |= ANYOF_EOS; |
| 1535 | } |
| 1536 | } |
| 1537 | else if (OP(scan) == OPEN) { |
| 1538 | pars++; |
| 1539 | } |
| 1540 | else if (OP(scan) == CLOSE) { |
| 1541 | if (ARG(scan) == is_par) { |
| 1542 | next = regnext(scan); |
| 1543 | |
| 1544 | if ( next && (OP(next) != WHILEM) && next < last) |
| 1545 | is_par = 0; /* Disable optimization */ |
| 1546 | } |
| 1547 | if (data) |
| 1548 | *(data->last_closep) = ARG(scan); |
| 1549 | } |
| 1550 | else if (OP(scan) == EVAL) { |
| 1551 | if (data) |
| 1552 | data->flags |= SF_HAS_EVAL; |
| 1553 | } |
| 1554 | else if (OP(scan) == LOGICAL && scan->flags == 2) { /* Embedded follows */ |
| 1555 | if (flags & SCF_DO_SUBSTR) { |
| 1556 | scan_commit(pRExC_state,data); |
| 1557 | data->longest = &(data->longest_float); |
| 1558 | } |
| 1559 | is_inf = is_inf_internal = 1; |
| 1560 | if (flags & SCF_DO_STCLASS_OR) /* Allow everything */ |
| 1561 | cl_anything(pRExC_state, data->start_class); |
| 1562 | flags &= ~SCF_DO_STCLASS; |
| 1563 | } |
| 1564 | /* Else: zero-length, ignore. */ |
| 1565 | scan = regnext(scan); |
| 1566 | } |
| 1567 | |
| 1568 | finish: |
| 1569 | *scanp = scan; |
| 1570 | *deltap = is_inf_internal ? I32_MAX : delta; |
| 1571 | if (flags & SCF_DO_SUBSTR && is_inf) |
| 1572 | data->pos_delta = I32_MAX - data->pos_min; |
| 1573 | if (is_par > U8_MAX) |
| 1574 | is_par = 0; |
| 1575 | if (is_par && pars==1 && data) { |
| 1576 | data->flags |= SF_IN_PAR; |
| 1577 | data->flags &= ~SF_HAS_PAR; |
| 1578 | } |
| 1579 | else if (pars && data) { |
| 1580 | data->flags |= SF_HAS_PAR; |
| 1581 | data->flags &= ~SF_IN_PAR; |
| 1582 | } |
| 1583 | if (flags & SCF_DO_STCLASS_OR) |
| 1584 | cl_and(data->start_class, &and_with); |
| 1585 | return min; |
| 1586 | } |
| 1587 | |
| 1588 | STATIC I32 |
| 1589 | S_add_data(pTHX_ RExC_state_t *pRExC_state, I32 n, char *s) |
| 1590 | { |
| 1591 | if (RExC_rx->data) { |
| 1592 | Renewc(RExC_rx->data, |
| 1593 | sizeof(*RExC_rx->data) + sizeof(void*) * (RExC_rx->data->count + n - 1), |
| 1594 | char, struct reg_data); |
| 1595 | Renew(RExC_rx->data->what, RExC_rx->data->count + n, U8); |
| 1596 | RExC_rx->data->count += n; |
| 1597 | } |
| 1598 | else { |
| 1599 | Newc(1207, RExC_rx->data, sizeof(*RExC_rx->data) + sizeof(void*) * (n - 1), |
| 1600 | char, struct reg_data); |
| 1601 | New(1208, RExC_rx->data->what, n, U8); |
| 1602 | RExC_rx->data->count = n; |
| 1603 | } |
| 1604 | Copy(s, RExC_rx->data->what + RExC_rx->data->count - n, n, U8); |
| 1605 | return RExC_rx->data->count - n; |
| 1606 | } |
| 1607 | |
| 1608 | void |
| 1609 | Perl_reginitcolors(pTHX) |
| 1610 | { |
| 1611 | int i = 0; |
| 1612 | char *s = PerlEnv_getenv("PERL_RE_COLORS"); |
| 1613 | |
| 1614 | if (s) { |
| 1615 | PL_colors[0] = s = savepv(s); |
| 1616 | while (++i < 6) { |
| 1617 | s = strchr(s, '\t'); |
| 1618 | if (s) { |
| 1619 | *s = '\0'; |
| 1620 | PL_colors[i] = ++s; |
| 1621 | } |
| 1622 | else |
| 1623 | PL_colors[i] = s = ""; |
| 1624 | } |
| 1625 | } else { |
| 1626 | while (i < 6) |
| 1627 | PL_colors[i++] = ""; |
| 1628 | } |
| 1629 | PL_colorset = 1; |
| 1630 | } |
| 1631 | |
| 1632 | |
| 1633 | /* |
| 1634 | - pregcomp - compile a regular expression into internal code |
| 1635 | * |
| 1636 | * We can't allocate space until we know how big the compiled form will be, |
| 1637 | * but we can't compile it (and thus know how big it is) until we've got a |
| 1638 | * place to put the code. So we cheat: we compile it twice, once with code |
| 1639 | * generation turned off and size counting turned on, and once "for real". |
| 1640 | * This also means that we don't allocate space until we are sure that the |
| 1641 | * thing really will compile successfully, and we never have to move the |
| 1642 | * code and thus invalidate pointers into it. (Note that it has to be in |
| 1643 | * one piece because free() must be able to free it all.) [NB: not true in perl] |
| 1644 | * |
| 1645 | * Beware that the optimization-preparation code in here knows about some |
| 1646 | * of the structure of the compiled regexp. [I'll say.] |
| 1647 | */ |
| 1648 | regexp * |
| 1649 | Perl_pregcomp(pTHX_ char *exp, char *xend, PMOP *pm) |
| 1650 | { |
| 1651 | register regexp *r; |
| 1652 | regnode *scan; |
| 1653 | regnode *first; |
| 1654 | I32 flags; |
| 1655 | I32 minlen = 0; |
| 1656 | I32 sawplus = 0; |
| 1657 | I32 sawopen = 0; |
| 1658 | scan_data_t data; |
| 1659 | RExC_state_t RExC_state; |
| 1660 | RExC_state_t *pRExC_state = &RExC_state; |
| 1661 | |
| 1662 | if (exp == NULL) |
| 1663 | FAIL("NULL regexp argument"); |
| 1664 | |
| 1665 | /* XXXX This looks very suspicious... */ |
| 1666 | if (pm->op_pmdynflags & PMdf_CMP_UTF8) |
| 1667 | RExC_utf8 = 1; |
| 1668 | else |
| 1669 | RExC_utf8 = 0; |
| 1670 | |
| 1671 | RExC_precomp = exp; |
| 1672 | DEBUG_r(if (!PL_colorset) reginitcolors()); |
| 1673 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%sCompiling REx%s `%s%*s%s'\n", |
| 1674 | PL_colors[4],PL_colors[5],PL_colors[0], |
| 1675 | (int)(xend - exp), RExC_precomp, PL_colors[1])); |
| 1676 | RExC_flags16 = pm->op_pmflags; |
| 1677 | RExC_sawback = 0; |
| 1678 | |
| 1679 | RExC_seen = 0; |
| 1680 | RExC_seen_zerolen = *exp == '^' ? -1 : 0; |
| 1681 | RExC_seen_evals = 0; |
| 1682 | RExC_extralen = 0; |
| 1683 | |
| 1684 | /* First pass: determine size, legality. */ |
| 1685 | RExC_parse = exp; |
| 1686 | RExC_start = exp; |
| 1687 | RExC_end = xend; |
| 1688 | RExC_naughty = 0; |
| 1689 | RExC_npar = 1; |
| 1690 | RExC_size = 0L; |
| 1691 | RExC_emit = &PL_regdummy; |
| 1692 | RExC_whilem_seen = 0; |
| 1693 | #if 0 /* REGC() is (currently) a NOP at the first pass. |
| 1694 | * Clever compilers notice this and complain. --jhi */ |
| 1695 | REGC((U8)REG_MAGIC, (char*)RExC_emit); |
| 1696 | #endif |
| 1697 | if (reg(pRExC_state, 0, &flags) == NULL) { |
| 1698 | RExC_precomp = Nullch; |
| 1699 | return(NULL); |
| 1700 | } |
| 1701 | DEBUG_r(PerlIO_printf(Perl_debug_log, "size %"IVdf" ", (IV)RExC_size)); |
| 1702 | |
| 1703 | /* Small enough for pointer-storage convention? |
| 1704 | If extralen==0, this means that we will not need long jumps. */ |
| 1705 | if (RExC_size >= 0x10000L && RExC_extralen) |
| 1706 | RExC_size += RExC_extralen; |
| 1707 | else |
| 1708 | RExC_extralen = 0; |
| 1709 | if (RExC_whilem_seen > 15) |
| 1710 | RExC_whilem_seen = 15; |
| 1711 | |
| 1712 | /* Allocate space and initialize. */ |
| 1713 | Newc(1001, r, sizeof(regexp) + (unsigned)RExC_size * sizeof(regnode), |
| 1714 | char, regexp); |
| 1715 | if (r == NULL) |
| 1716 | FAIL("Regexp out of space"); |
| 1717 | |
| 1718 | #ifdef DEBUGGING |
| 1719 | /* avoid reading uninitialized memory in DEBUGGING code in study_chunk() */ |
| 1720 | Zero(r, sizeof(regexp) + (unsigned)RExC_size * sizeof(regnode), char); |
| 1721 | #endif |
| 1722 | r->refcnt = 1; |
| 1723 | r->prelen = xend - exp; |
| 1724 | r->precomp = savepvn(RExC_precomp, r->prelen); |
| 1725 | r->subbeg = NULL; |
| 1726 | r->reganch = pm->op_pmflags & PMf_COMPILETIME; |
| 1727 | r->nparens = RExC_npar - 1; /* set early to validate backrefs */ |
| 1728 | |
| 1729 | r->substrs = 0; /* Useful during FAIL. */ |
| 1730 | r->startp = 0; /* Useful during FAIL. */ |
| 1731 | r->endp = 0; /* Useful during FAIL. */ |
| 1732 | |
| 1733 | Newz(1304, r->offsets, 2*RExC_size+1, U32); /* MJD 20001228 */ |
| 1734 | if (r->offsets) { |
| 1735 | r->offsets[0] = RExC_size; |
| 1736 | } |
| 1737 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
| 1738 | "%s %"UVuf" bytes for offset annotations.\n", |
| 1739 | r->offsets ? "Got" : "Couldn't get", |
| 1740 | (UV)((2*RExC_size+1) * sizeof(U32)))); |
| 1741 | |
| 1742 | RExC_rx = r; |
| 1743 | |
| 1744 | /* Second pass: emit code. */ |
| 1745 | RExC_flags16 = pm->op_pmflags; /* don't let top level (?i) bleed */ |
| 1746 | RExC_parse = exp; |
| 1747 | RExC_end = xend; |
| 1748 | RExC_naughty = 0; |
| 1749 | RExC_npar = 1; |
| 1750 | RExC_emit_start = r->program; |
| 1751 | RExC_emit = r->program; |
| 1752 | /* Store the count of eval-groups for security checks: */ |
| 1753 | RExC_emit->next_off = ((RExC_seen_evals > U16_MAX) ? U16_MAX : RExC_seen_evals); |
| 1754 | REGC((U8)REG_MAGIC, (char*) RExC_emit++); |
| 1755 | r->data = 0; |
| 1756 | if (reg(pRExC_state, 0, &flags) == NULL) |
| 1757 | return(NULL); |
| 1758 | |
| 1759 | /* Dig out information for optimizations. */ |
| 1760 | r->reganch = pm->op_pmflags & PMf_COMPILETIME; /* Again? */ |
| 1761 | pm->op_pmflags = RExC_flags16; |
| 1762 | if (UTF) |
| 1763 | r->reganch |= ROPT_UTF8; |
| 1764 | r->regstclass = NULL; |
| 1765 | if (RExC_naughty >= 10) /* Probably an expensive pattern. */ |
| 1766 | r->reganch |= ROPT_NAUGHTY; |
| 1767 | scan = r->program + 1; /* First BRANCH. */ |
| 1768 | |
| 1769 | /* XXXX To minimize changes to RE engine we always allocate |
| 1770 | 3-units-long substrs field. */ |
| 1771 | Newz(1004, r->substrs, 1, struct reg_substr_data); |
| 1772 | |
| 1773 | StructCopy(&zero_scan_data, &data, scan_data_t); |
| 1774 | /* XXXX Should not we check for something else? Usually it is OPEN1... */ |
| 1775 | if (OP(scan) != BRANCH) { /* Only one top-level choice. */ |
| 1776 | I32 fake; |
| 1777 | STRLEN longest_float_length, longest_fixed_length; |
| 1778 | struct regnode_charclass_class ch_class; |
| 1779 | int stclass_flag; |
| 1780 | I32 last_close = 0; |
| 1781 | |
| 1782 | first = scan; |
| 1783 | /* Skip introductions and multiplicators >= 1. */ |
| 1784 | while ((OP(first) == OPEN && (sawopen = 1)) || |
| 1785 | /* An OR of *one* alternative - should not happen now. */ |
| 1786 | (OP(first) == BRANCH && OP(regnext(first)) != BRANCH) || |
| 1787 | (OP(first) == PLUS) || |
| 1788 | (OP(first) == MINMOD) || |
| 1789 | /* An {n,m} with n>0 */ |
| 1790 | (PL_regkind[(U8)OP(first)] == CURLY && ARG1(first) > 0) ) { |
| 1791 | if (OP(first) == PLUS) |
| 1792 | sawplus = 1; |
| 1793 | else |
| 1794 | first += regarglen[(U8)OP(first)]; |
| 1795 | first = NEXTOPER(first); |
| 1796 | } |
| 1797 | |
| 1798 | /* Starting-point info. */ |
| 1799 | again: |
| 1800 | if (PL_regkind[(U8)OP(first)] == EXACT) { |
| 1801 | if (OP(first) == EXACT) |
| 1802 | ; /* Empty, get anchored substr later. */ |
| 1803 | else if ((OP(first) == EXACTF || OP(first) == EXACTFL)) |
| 1804 | r->regstclass = first; |
| 1805 | } |
| 1806 | else if (strchr((char*)PL_simple,OP(first))) |
| 1807 | r->regstclass = first; |
| 1808 | else if (PL_regkind[(U8)OP(first)] == BOUND || |
| 1809 | PL_regkind[(U8)OP(first)] == NBOUND) |
| 1810 | r->regstclass = first; |
| 1811 | else if (PL_regkind[(U8)OP(first)] == BOL) { |
| 1812 | r->reganch |= (OP(first) == MBOL |
| 1813 | ? ROPT_ANCH_MBOL |
| 1814 | : (OP(first) == SBOL |
| 1815 | ? ROPT_ANCH_SBOL |
| 1816 | : ROPT_ANCH_BOL)); |
| 1817 | first = NEXTOPER(first); |
| 1818 | goto again; |
| 1819 | } |
| 1820 | else if (OP(first) == GPOS) { |
| 1821 | r->reganch |= ROPT_ANCH_GPOS; |
| 1822 | first = NEXTOPER(first); |
| 1823 | goto again; |
| 1824 | } |
| 1825 | else if ((OP(first) == STAR && |
| 1826 | PL_regkind[(U8)OP(NEXTOPER(first))] == REG_ANY) && |
| 1827 | !(r->reganch & ROPT_ANCH) ) |
| 1828 | { |
| 1829 | /* turn .* into ^.* with an implied $*=1 */ |
| 1830 | int type = OP(NEXTOPER(first)); |
| 1831 | |
| 1832 | if (type == REG_ANY) |
| 1833 | type = ROPT_ANCH_MBOL; |
| 1834 | else |
| 1835 | type = ROPT_ANCH_SBOL; |
| 1836 | |
| 1837 | r->reganch |= type | ROPT_IMPLICIT; |
| 1838 | first = NEXTOPER(first); |
| 1839 | goto again; |
| 1840 | } |
| 1841 | if (sawplus && (!sawopen || !RExC_sawback) |
| 1842 | && !(RExC_seen & REG_SEEN_EVAL)) /* May examine pos and $& */ |
| 1843 | /* x+ must match at the 1st pos of run of x's */ |
| 1844 | r->reganch |= ROPT_SKIP; |
| 1845 | |
| 1846 | /* Scan is after the zeroth branch, first is atomic matcher. */ |
| 1847 | DEBUG_r(PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n", |
| 1848 | (IV)(first - scan + 1))); |
| 1849 | /* |
| 1850 | * If there's something expensive in the r.e., find the |
| 1851 | * longest literal string that must appear and make it the |
| 1852 | * regmust. Resolve ties in favor of later strings, since |
| 1853 | * the regstart check works with the beginning of the r.e. |
| 1854 | * and avoiding duplication strengthens checking. Not a |
| 1855 | * strong reason, but sufficient in the absence of others. |
| 1856 | * [Now we resolve ties in favor of the earlier string if |
| 1857 | * it happens that c_offset_min has been invalidated, since the |
| 1858 | * earlier string may buy us something the later one won't.] |
| 1859 | */ |
| 1860 | minlen = 0; |
| 1861 | |
| 1862 | data.longest_fixed = newSVpvn("",0); |
| 1863 | data.longest_float = newSVpvn("",0); |
| 1864 | data.last_found = newSVpvn("",0); |
| 1865 | data.longest = &(data.longest_fixed); |
| 1866 | first = scan; |
| 1867 | if (!r->regstclass) { |
| 1868 | cl_init(pRExC_state, &ch_class); |
| 1869 | data.start_class = &ch_class; |
| 1870 | stclass_flag = SCF_DO_STCLASS_AND; |
| 1871 | } else /* XXXX Check for BOUND? */ |
| 1872 | stclass_flag = 0; |
| 1873 | data.last_closep = &last_close; |
| 1874 | |
| 1875 | minlen = study_chunk(pRExC_state, &first, &fake, scan + RExC_size, /* Up to end */ |
| 1876 | &data, SCF_DO_SUBSTR | SCF_WHILEM_VISITED_POS | stclass_flag); |
| 1877 | if ( RExC_npar == 1 && data.longest == &(data.longest_fixed) |
| 1878 | && data.last_start_min == 0 && data.last_end > 0 |
| 1879 | && !RExC_seen_zerolen |
| 1880 | && (!(RExC_seen & REG_SEEN_GPOS) || (r->reganch & ROPT_ANCH_GPOS))) |
| 1881 | r->reganch |= ROPT_CHECK_ALL; |
| 1882 | scan_commit(pRExC_state, &data); |
| 1883 | SvREFCNT_dec(data.last_found); |
| 1884 | |
| 1885 | longest_float_length = CHR_SVLEN(data.longest_float); |
| 1886 | if (longest_float_length |
| 1887 | || (data.flags & SF_FL_BEFORE_EOL |
| 1888 | && (!(data.flags & SF_FL_BEFORE_MEOL) |
| 1889 | || (RExC_flags16 & PMf_MULTILINE)))) { |
| 1890 | int t; |
| 1891 | |
| 1892 | if (SvCUR(data.longest_fixed) /* ok to leave SvCUR */ |
| 1893 | && data.offset_fixed == data.offset_float_min |
| 1894 | && SvCUR(data.longest_fixed) == SvCUR(data.longest_float)) |
| 1895 | goto remove_float; /* As in (a)+. */ |
| 1896 | |
| 1897 | r->float_substr = data.longest_float; |
| 1898 | r->float_min_offset = data.offset_float_min; |
| 1899 | r->float_max_offset = data.offset_float_max; |
| 1900 | t = (data.flags & SF_FL_BEFORE_EOL /* Can't have SEOL and MULTI */ |
| 1901 | && (!(data.flags & SF_FL_BEFORE_MEOL) |
| 1902 | || (RExC_flags16 & PMf_MULTILINE))); |
| 1903 | fbm_compile(r->float_substr, t ? FBMcf_TAIL : 0); |
| 1904 | } |
| 1905 | else { |
| 1906 | remove_float: |
| 1907 | r->float_substr = Nullsv; |
| 1908 | SvREFCNT_dec(data.longest_float); |
| 1909 | longest_float_length = 0; |
| 1910 | } |
| 1911 | |
| 1912 | longest_fixed_length = CHR_SVLEN(data.longest_fixed); |
| 1913 | if (longest_fixed_length |
| 1914 | || (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */ |
| 1915 | && (!(data.flags & SF_FIX_BEFORE_MEOL) |
| 1916 | || (RExC_flags16 & PMf_MULTILINE)))) { |
| 1917 | int t; |
| 1918 | |
| 1919 | r->anchored_substr = data.longest_fixed; |
| 1920 | r->anchored_offset = data.offset_fixed; |
| 1921 | t = (data.flags & SF_FIX_BEFORE_EOL /* Can't have SEOL and MULTI */ |
| 1922 | && (!(data.flags & SF_FIX_BEFORE_MEOL) |
| 1923 | || (RExC_flags16 & PMf_MULTILINE))); |
| 1924 | fbm_compile(r->anchored_substr, t ? FBMcf_TAIL : 0); |
| 1925 | } |
| 1926 | else { |
| 1927 | r->anchored_substr = Nullsv; |
| 1928 | SvREFCNT_dec(data.longest_fixed); |
| 1929 | longest_fixed_length = 0; |
| 1930 | } |
| 1931 | if (r->regstclass |
| 1932 | && (OP(r->regstclass) == REG_ANY || OP(r->regstclass) == SANY)) |
| 1933 | r->regstclass = NULL; |
| 1934 | if ((!r->anchored_substr || r->anchored_offset) && stclass_flag |
| 1935 | && !(data.start_class->flags & ANYOF_EOS) |
| 1936 | && !cl_is_anything(data.start_class)) { |
| 1937 | I32 n = add_data(pRExC_state, 1, "f"); |
| 1938 | |
| 1939 | New(1006, RExC_rx->data->data[n], 1, |
| 1940 | struct regnode_charclass_class); |
| 1941 | StructCopy(data.start_class, |
| 1942 | (struct regnode_charclass_class*)RExC_rx->data->data[n], |
| 1943 | struct regnode_charclass_class); |
| 1944 | r->regstclass = (regnode*)RExC_rx->data->data[n]; |
| 1945 | r->reganch &= ~ROPT_SKIP; /* Used in find_byclass(). */ |
| 1946 | PL_regdata = r->data; /* for regprop() */ |
| 1947 | DEBUG_r({ SV *sv = sv_newmortal(); |
| 1948 | regprop(sv, (regnode*)data.start_class); |
| 1949 | PerlIO_printf(Perl_debug_log, |
| 1950 | "synthetic stclass `%s'.\n", |
| 1951 | SvPVX(sv));}); |
| 1952 | } |
| 1953 | |
| 1954 | /* A temporary algorithm prefers floated substr to fixed one to dig more info. */ |
| 1955 | if (longest_fixed_length > longest_float_length) { |
| 1956 | r->check_substr = r->anchored_substr; |
| 1957 | r->check_offset_min = r->check_offset_max = r->anchored_offset; |
| 1958 | if (r->reganch & ROPT_ANCH_SINGLE) |
| 1959 | r->reganch |= ROPT_NOSCAN; |
| 1960 | } |
| 1961 | else { |
| 1962 | r->check_substr = r->float_substr; |
| 1963 | r->check_offset_min = data.offset_float_min; |
| 1964 | r->check_offset_max = data.offset_float_max; |
| 1965 | } |
| 1966 | /* XXXX Currently intuiting is not compatible with ANCH_GPOS. |
| 1967 | This should be changed ASAP! */ |
| 1968 | if (r->check_substr && !(r->reganch & ROPT_ANCH_GPOS)) { |
| 1969 | r->reganch |= RE_USE_INTUIT; |
| 1970 | if (SvTAIL(r->check_substr)) |
| 1971 | r->reganch |= RE_INTUIT_TAIL; |
| 1972 | } |
| 1973 | } |
| 1974 | else { |
| 1975 | /* Several toplevels. Best we can is to set minlen. */ |
| 1976 | I32 fake; |
| 1977 | struct regnode_charclass_class ch_class; |
| 1978 | I32 last_close = 0; |
| 1979 | |
| 1980 | DEBUG_r(PerlIO_printf(Perl_debug_log, "\n")); |
| 1981 | scan = r->program + 1; |
| 1982 | cl_init(pRExC_state, &ch_class); |
| 1983 | data.start_class = &ch_class; |
| 1984 | data.last_closep = &last_close; |
| 1985 | minlen = study_chunk(pRExC_state, &scan, &fake, scan + RExC_size, &data, SCF_DO_STCLASS_AND|SCF_WHILEM_VISITED_POS); |
| 1986 | r->check_substr = r->anchored_substr = r->float_substr = Nullsv; |
| 1987 | if (!(data.start_class->flags & ANYOF_EOS) |
| 1988 | && !cl_is_anything(data.start_class)) { |
| 1989 | I32 n = add_data(pRExC_state, 1, "f"); |
| 1990 | |
| 1991 | New(1006, RExC_rx->data->data[n], 1, |
| 1992 | struct regnode_charclass_class); |
| 1993 | StructCopy(data.start_class, |
| 1994 | (struct regnode_charclass_class*)RExC_rx->data->data[n], |
| 1995 | struct regnode_charclass_class); |
| 1996 | r->regstclass = (regnode*)RExC_rx->data->data[n]; |
| 1997 | r->reganch &= ~ROPT_SKIP; /* Used in find_byclass(). */ |
| 1998 | DEBUG_r({ SV* sv = sv_newmortal(); |
| 1999 | regprop(sv, (regnode*)data.start_class); |
| 2000 | PerlIO_printf(Perl_debug_log, |
| 2001 | "synthetic stclass `%s'.\n", |
| 2002 | SvPVX(sv));}); |
| 2003 | } |
| 2004 | } |
| 2005 | |
| 2006 | r->minlen = minlen; |
| 2007 | if (RExC_seen & REG_SEEN_GPOS) |
| 2008 | r->reganch |= ROPT_GPOS_SEEN; |
| 2009 | if (RExC_seen & REG_SEEN_LOOKBEHIND) |
| 2010 | r->reganch |= ROPT_LOOKBEHIND_SEEN; |
| 2011 | if (RExC_seen & REG_SEEN_EVAL) |
| 2012 | r->reganch |= ROPT_EVAL_SEEN; |
| 2013 | if (RExC_seen & REG_SEEN_CANY) |
| 2014 | r->reganch |= ROPT_CANY_SEEN; |
| 2015 | Newz(1002, r->startp, RExC_npar, I32); |
| 2016 | Newz(1002, r->endp, RExC_npar, I32); |
| 2017 | PL_regdata = r->data; /* for regprop() */ |
| 2018 | DEBUG_r(regdump(r)); |
| 2019 | return(r); |
| 2020 | } |
| 2021 | |
| 2022 | /* |
| 2023 | - reg - regular expression, i.e. main body or parenthesized thing |
| 2024 | * |
| 2025 | * Caller must absorb opening parenthesis. |
| 2026 | * |
| 2027 | * Combining parenthesis handling with the base level of regular expression |
| 2028 | * is a trifle forced, but the need to tie the tails of the branches to what |
| 2029 | * follows makes it hard to avoid. |
| 2030 | */ |
| 2031 | STATIC regnode * |
| 2032 | S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp) |
| 2033 | /* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */ |
| 2034 | { |
| 2035 | register regnode *ret; /* Will be the head of the group. */ |
| 2036 | register regnode *br; |
| 2037 | register regnode *lastbr; |
| 2038 | register regnode *ender = 0; |
| 2039 | register I32 parno = 0; |
| 2040 | I32 flags, oregflags = RExC_flags16, have_branch = 0, open = 0; |
| 2041 | |
| 2042 | /* for (?g), (?gc), and (?o) warnings; warning |
| 2043 | about (?c) will warn about (?g) -- japhy */ |
| 2044 | |
| 2045 | I32 wastedflags = 0x00, |
| 2046 | wasted_o = 0x01, |
| 2047 | wasted_g = 0x02, |
| 2048 | wasted_gc = 0x02 | 0x04, |
| 2049 | wasted_c = 0x04; |
| 2050 | |
| 2051 | char * parse_start = RExC_parse; /* MJD */ |
| 2052 | char *oregcomp_parse = RExC_parse; |
| 2053 | char c; |
| 2054 | |
| 2055 | *flagp = 0; /* Tentatively. */ |
| 2056 | |
| 2057 | |
| 2058 | /* Make an OPEN node, if parenthesized. */ |
| 2059 | if (paren) { |
| 2060 | if (*RExC_parse == '?') { /* (?...) */ |
| 2061 | U16 posflags = 0, negflags = 0; |
| 2062 | U16 *flagsp = &posflags; |
| 2063 | int logical = 0; |
| 2064 | char *seqstart = RExC_parse; |
| 2065 | |
| 2066 | RExC_parse++; |
| 2067 | paren = *RExC_parse++; |
| 2068 | ret = NULL; /* For look-ahead/behind. */ |
| 2069 | switch (paren) { |
| 2070 | case '<': /* (?<...) */ |
| 2071 | RExC_seen |= REG_SEEN_LOOKBEHIND; |
| 2072 | if (*RExC_parse == '!') |
| 2073 | paren = ','; |
| 2074 | if (*RExC_parse != '=' && *RExC_parse != '!') |
| 2075 | goto unknown; |
| 2076 | RExC_parse++; |
| 2077 | case '=': /* (?=...) */ |
| 2078 | case '!': /* (?!...) */ |
| 2079 | RExC_seen_zerolen++; |
| 2080 | case ':': /* (?:...) */ |
| 2081 | case '>': /* (?>...) */ |
| 2082 | break; |
| 2083 | case '$': /* (?$...) */ |
| 2084 | case '@': /* (?@...) */ |
| 2085 | vFAIL2("Sequence (?%c...) not implemented", (int)paren); |
| 2086 | break; |
| 2087 | case '#': /* (?#...) */ |
| 2088 | while (*RExC_parse && *RExC_parse != ')') |
| 2089 | RExC_parse++; |
| 2090 | if (*RExC_parse != ')') |
| 2091 | FAIL("Sequence (?#... not terminated"); |
| 2092 | nextchar(pRExC_state); |
| 2093 | *flagp = TRYAGAIN; |
| 2094 | return NULL; |
| 2095 | case 'p': /* (?p...) */ |
| 2096 | if (SIZE_ONLY && ckWARN2(WARN_DEPRECATED, WARN_REGEXP)) |
| 2097 | vWARNdep(RExC_parse, "(?p{}) is deprecated - use (??{})"); |
| 2098 | /* FALL THROUGH*/ |
| 2099 | case '?': /* (??...) */ |
| 2100 | logical = 1; |
| 2101 | paren = *RExC_parse++; |
| 2102 | /* FALL THROUGH */ |
| 2103 | case '{': /* (?{...}) */ |
| 2104 | { |
| 2105 | I32 count = 1, n = 0; |
| 2106 | char c; |
| 2107 | char *s = RExC_parse; |
| 2108 | SV *sv; |
| 2109 | OP_4tree *sop, *rop; |
| 2110 | |
| 2111 | RExC_seen_zerolen++; |
| 2112 | RExC_seen |= REG_SEEN_EVAL; |
| 2113 | while (count && (c = *RExC_parse)) { |
| 2114 | if (c == '\\' && RExC_parse[1]) |
| 2115 | RExC_parse++; |
| 2116 | else if (c == '{') |
| 2117 | count++; |
| 2118 | else if (c == '}') |
| 2119 | count--; |
| 2120 | RExC_parse++; |
| 2121 | } |
| 2122 | if (*RExC_parse != ')') |
| 2123 | { |
| 2124 | RExC_parse = s; |
| 2125 | vFAIL("Sequence (?{...}) not terminated or not {}-balanced"); |
| 2126 | } |
| 2127 | if (!SIZE_ONLY) { |
| 2128 | AV *av; |
| 2129 | |
| 2130 | if (RExC_parse - 1 - s) |
| 2131 | sv = newSVpvn(s, RExC_parse - 1 - s); |
| 2132 | else |
| 2133 | sv = newSVpvn("", 0); |
| 2134 | |
| 2135 | ENTER; |
| 2136 | Perl_save_re_context(aTHX); |
| 2137 | rop = sv_compile_2op(sv, &sop, "re", &av); |
| 2138 | sop->op_private |= OPpREFCOUNTED; |
| 2139 | /* re_dup will OpREFCNT_inc */ |
| 2140 | OpREFCNT_set(sop, 1); |
| 2141 | LEAVE; |
| 2142 | |
| 2143 | n = add_data(pRExC_state, 3, "nop"); |
| 2144 | RExC_rx->data->data[n] = (void*)rop; |
| 2145 | RExC_rx->data->data[n+1] = (void*)sop; |
| 2146 | RExC_rx->data->data[n+2] = (void*)av; |
| 2147 | SvREFCNT_dec(sv); |
| 2148 | } |
| 2149 | else { /* First pass */ |
| 2150 | if (PL_reginterp_cnt < ++RExC_seen_evals |
| 2151 | && PL_curcop != &PL_compiling) |
| 2152 | /* No compiled RE interpolated, has runtime |
| 2153 | components ===> unsafe. */ |
| 2154 | FAIL("Eval-group not allowed at runtime, use re 'eval'"); |
| 2155 | if (PL_tainting && PL_tainted) |
| 2156 | FAIL("Eval-group in insecure regular expression"); |
| 2157 | } |
| 2158 | |
| 2159 | nextchar(pRExC_state); |
| 2160 | if (logical) { |
| 2161 | ret = reg_node(pRExC_state, LOGICAL); |
| 2162 | if (!SIZE_ONLY) |
| 2163 | ret->flags = 2; |
| 2164 | regtail(pRExC_state, ret, reganode(pRExC_state, EVAL, n)); |
| 2165 | /* deal with the length of this later - MJD */ |
| 2166 | return ret; |
| 2167 | } |
| 2168 | return reganode(pRExC_state, EVAL, n); |
| 2169 | } |
| 2170 | case '(': /* (?(?{...})...) and (?(?=...)...) */ |
| 2171 | { |
| 2172 | if (RExC_parse[0] == '?') { /* (?(?...)) */ |
| 2173 | if (RExC_parse[1] == '=' || RExC_parse[1] == '!' |
| 2174 | || RExC_parse[1] == '<' |
| 2175 | || RExC_parse[1] == '{') { /* Lookahead or eval. */ |
| 2176 | I32 flag; |
| 2177 | |
| 2178 | ret = reg_node(pRExC_state, LOGICAL); |
| 2179 | if (!SIZE_ONLY) |
| 2180 | ret->flags = 1; |
| 2181 | regtail(pRExC_state, ret, reg(pRExC_state, 1, &flag)); |
| 2182 | goto insert_if; |
| 2183 | } |
| 2184 | } |
| 2185 | else if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) { |
| 2186 | /* (?(1)...) */ |
| 2187 | parno = atoi(RExC_parse++); |
| 2188 | |
| 2189 | while (isDIGIT(*RExC_parse)) |
| 2190 | RExC_parse++; |
| 2191 | ret = reganode(pRExC_state, GROUPP, parno); |
| 2192 | |
| 2193 | if ((c = *nextchar(pRExC_state)) != ')') |
| 2194 | vFAIL("Switch condition not recognized"); |
| 2195 | insert_if: |
| 2196 | regtail(pRExC_state, ret, reganode(pRExC_state, IFTHEN, 0)); |
| 2197 | br = regbranch(pRExC_state, &flags, 1); |
| 2198 | if (br == NULL) |
| 2199 | br = reganode(pRExC_state, LONGJMP, 0); |
| 2200 | else |
| 2201 | regtail(pRExC_state, br, reganode(pRExC_state, LONGJMP, 0)); |
| 2202 | c = *nextchar(pRExC_state); |
| 2203 | if (flags&HASWIDTH) |
| 2204 | *flagp |= HASWIDTH; |
| 2205 | if (c == '|') { |
| 2206 | lastbr = reganode(pRExC_state, IFTHEN, 0); /* Fake one for optimizer. */ |
| 2207 | regbranch(pRExC_state, &flags, 1); |
| 2208 | regtail(pRExC_state, ret, lastbr); |
| 2209 | if (flags&HASWIDTH) |
| 2210 | *flagp |= HASWIDTH; |
| 2211 | c = *nextchar(pRExC_state); |
| 2212 | } |
| 2213 | else |
| 2214 | lastbr = NULL; |
| 2215 | if (c != ')') |
| 2216 | vFAIL("Switch (?(condition)... contains too many branches"); |
| 2217 | ender = reg_node(pRExC_state, TAIL); |
| 2218 | regtail(pRExC_state, br, ender); |
| 2219 | if (lastbr) { |
| 2220 | regtail(pRExC_state, lastbr, ender); |
| 2221 | regtail(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); |
| 2222 | } |
| 2223 | else |
| 2224 | regtail(pRExC_state, ret, ender); |
| 2225 | return ret; |
| 2226 | } |
| 2227 | else { |
| 2228 | vFAIL2("Unknown switch condition (?(%.2s", RExC_parse); |
| 2229 | } |
| 2230 | } |
| 2231 | case 0: |
| 2232 | RExC_parse--; /* for vFAIL to print correctly */ |
| 2233 | vFAIL("Sequence (? incomplete"); |
| 2234 | break; |
| 2235 | default: |
| 2236 | --RExC_parse; |
| 2237 | parse_flags: /* (?i) */ |
| 2238 | while (*RExC_parse && strchr("iogcmsx", *RExC_parse)) { |
| 2239 | /* (?g), (?gc) and (?o) are useless here |
| 2240 | and must be globally applied -- japhy */ |
| 2241 | |
| 2242 | if (*RExC_parse == 'o' || *RExC_parse == 'g') { |
| 2243 | if (SIZE_ONLY && ckWARN(WARN_REGEXP)) { |
| 2244 | I32 wflagbit = *RExC_parse == 'o' ? wasted_o : wasted_g; |
| 2245 | if (! (wastedflags & wflagbit) ) { |
| 2246 | wastedflags |= wflagbit; |
| 2247 | vWARN5( |
| 2248 | RExC_parse + 1, |
| 2249 | "Useless (%s%c) - %suse /%c modifier", |
| 2250 | flagsp == &negflags ? "?-" : "?", |
| 2251 | *RExC_parse, |
| 2252 | flagsp == &negflags ? "don't " : "", |
| 2253 | *RExC_parse |
| 2254 | ); |
| 2255 | } |
| 2256 | } |
| 2257 | } |
| 2258 | else if (*RExC_parse == 'c') { |
| 2259 | if (SIZE_ONLY && ckWARN(WARN_REGEXP)) { |
| 2260 | if (! (wastedflags & wasted_c) ) { |
| 2261 | wastedflags |= wasted_gc; |
| 2262 | vWARN3( |
| 2263 | RExC_parse + 1, |
| 2264 | "Useless (%sc) - %suse /gc modifier", |
| 2265 | flagsp == &negflags ? "?-" : "?", |
| 2266 | flagsp == &negflags ? "don't " : "" |
| 2267 | ); |
| 2268 | } |
| 2269 | } |
| 2270 | } |
| 2271 | else { pmflag(flagsp, *RExC_parse); } |
| 2272 | |
| 2273 | ++RExC_parse; |
| 2274 | } |
| 2275 | if (*RExC_parse == '-') { |
| 2276 | flagsp = &negflags; |
| 2277 | wastedflags = 0; /* reset so (?g-c) warns twice */ |
| 2278 | ++RExC_parse; |
| 2279 | goto parse_flags; |
| 2280 | } |
| 2281 | RExC_flags16 |= posflags; |
| 2282 | RExC_flags16 &= ~negflags; |
| 2283 | if (*RExC_parse == ':') { |
| 2284 | RExC_parse++; |
| 2285 | paren = ':'; |
| 2286 | break; |
| 2287 | } |
| 2288 | unknown: |
| 2289 | if (*RExC_parse != ')') { |
| 2290 | RExC_parse++; |
| 2291 | vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart); |
| 2292 | } |
| 2293 | nextchar(pRExC_state); |
| 2294 | *flagp = TRYAGAIN; |
| 2295 | return NULL; |
| 2296 | } |
| 2297 | } |
| 2298 | else { /* (...) */ |
| 2299 | parno = RExC_npar; |
| 2300 | RExC_npar++; |
| 2301 | ret = reganode(pRExC_state, OPEN, parno); |
| 2302 | Set_Node_Length(ret, 1); /* MJD */ |
| 2303 | Set_Node_Offset(ret, RExC_parse); /* MJD */ |
| 2304 | open = 1; |
| 2305 | } |
| 2306 | } |
| 2307 | else /* ! paren */ |
| 2308 | ret = NULL; |
| 2309 | |
| 2310 | /* Pick up the branches, linking them together. */ |
| 2311 | parse_start = RExC_parse; /* MJD */ |
| 2312 | br = regbranch(pRExC_state, &flags, 1); |
| 2313 | /* branch_len = (paren != 0); */ |
| 2314 | |
| 2315 | if (br == NULL) |
| 2316 | return(NULL); |
| 2317 | if (*RExC_parse == '|') { |
| 2318 | if (!SIZE_ONLY && RExC_extralen) { |
| 2319 | reginsert(pRExC_state, BRANCHJ, br); |
| 2320 | } |
| 2321 | else { /* MJD */ |
| 2322 | reginsert(pRExC_state, BRANCH, br); |
| 2323 | Set_Node_Length(br, paren != 0); |
| 2324 | Set_Node_Offset_To_R(br-RExC_emit_start, parse_start-RExC_start); |
| 2325 | } |
| 2326 | have_branch = 1; |
| 2327 | if (SIZE_ONLY) |
| 2328 | RExC_extralen += 1; /* For BRANCHJ-BRANCH. */ |
| 2329 | } |
| 2330 | else if (paren == ':') { |
| 2331 | *flagp |= flags&SIMPLE; |
| 2332 | } |
| 2333 | if (open) { /* Starts with OPEN. */ |
| 2334 | regtail(pRExC_state, ret, br); /* OPEN -> first. */ |
| 2335 | } |
| 2336 | else if (paren != '?') /* Not Conditional */ |
| 2337 | ret = br; |
| 2338 | if (flags&HASWIDTH) |
| 2339 | *flagp |= HASWIDTH; |
| 2340 | *flagp |= flags&SPSTART; |
| 2341 | lastbr = br; |
| 2342 | while (*RExC_parse == '|') { |
| 2343 | if (!SIZE_ONLY && RExC_extralen) { |
| 2344 | ender = reganode(pRExC_state, LONGJMP,0); |
| 2345 | regtail(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); /* Append to the previous. */ |
| 2346 | } |
| 2347 | if (SIZE_ONLY) |
| 2348 | RExC_extralen += 2; /* Account for LONGJMP. */ |
| 2349 | nextchar(pRExC_state); |
| 2350 | br = regbranch(pRExC_state, &flags, 0); |
| 2351 | |
| 2352 | if (br == NULL) |
| 2353 | return(NULL); |
| 2354 | regtail(pRExC_state, lastbr, br); /* BRANCH -> BRANCH. */ |
| 2355 | lastbr = br; |
| 2356 | if (flags&HASWIDTH) |
| 2357 | *flagp |= HASWIDTH; |
| 2358 | *flagp |= flags&SPSTART; |
| 2359 | } |
| 2360 | |
| 2361 | if (have_branch || paren != ':') { |
| 2362 | /* Make a closing node, and hook it on the end. */ |
| 2363 | switch (paren) { |
| 2364 | case ':': |
| 2365 | ender = reg_node(pRExC_state, TAIL); |
| 2366 | break; |
| 2367 | case 1: |
| 2368 | ender = reganode(pRExC_state, CLOSE, parno); |
| 2369 | Set_Node_Offset(ender,RExC_parse+1); /* MJD */ |
| 2370 | Set_Node_Length(ender,1); /* MJD */ |
| 2371 | break; |
| 2372 | case '<': |
| 2373 | case ',': |
| 2374 | case '=': |
| 2375 | case '!': |
| 2376 | *flagp &= ~HASWIDTH; |
| 2377 | /* FALL THROUGH */ |
| 2378 | case '>': |
| 2379 | ender = reg_node(pRExC_state, SUCCEED); |
| 2380 | break; |
| 2381 | case 0: |
| 2382 | ender = reg_node(pRExC_state, END); |
| 2383 | break; |
| 2384 | } |
| 2385 | regtail(pRExC_state, lastbr, ender); |
| 2386 | |
| 2387 | if (have_branch) { |
| 2388 | /* Hook the tails of the branches to the closing node. */ |
| 2389 | for (br = ret; br != NULL; br = regnext(br)) { |
| 2390 | regoptail(pRExC_state, br, ender); |
| 2391 | } |
| 2392 | } |
| 2393 | } |
| 2394 | |
| 2395 | { |
| 2396 | char *p; |
| 2397 | static char parens[] = "=!<,>"; |
| 2398 | |
| 2399 | if (paren && (p = strchr(parens, paren))) { |
| 2400 | int node = ((p - parens) % 2) ? UNLESSM : IFMATCH; |
| 2401 | int flag = (p - parens) > 1; |
| 2402 | |
| 2403 | if (paren == '>') |
| 2404 | node = SUSPEND, flag = 0; |
| 2405 | reginsert(pRExC_state, node,ret); |
| 2406 | ret->flags = flag; |
| 2407 | regtail(pRExC_state, ret, reg_node(pRExC_state, TAIL)); |
| 2408 | } |
| 2409 | } |
| 2410 | |
| 2411 | /* Check for proper termination. */ |
| 2412 | if (paren) { |
| 2413 | RExC_flags16 = oregflags; |
| 2414 | if (RExC_parse >= RExC_end || *nextchar(pRExC_state) != ')') { |
| 2415 | RExC_parse = oregcomp_parse; |
| 2416 | vFAIL("Unmatched ("); |
| 2417 | } |
| 2418 | } |
| 2419 | else if (!paren && RExC_parse < RExC_end) { |
| 2420 | if (*RExC_parse == ')') { |
| 2421 | RExC_parse++; |
| 2422 | vFAIL("Unmatched )"); |
| 2423 | } |
| 2424 | else |
| 2425 | FAIL("Junk on end of regexp"); /* "Can't happen". */ |
| 2426 | /* NOTREACHED */ |
| 2427 | } |
| 2428 | |
| 2429 | return(ret); |
| 2430 | } |
| 2431 | |
| 2432 | /* |
| 2433 | - regbranch - one alternative of an | operator |
| 2434 | * |
| 2435 | * Implements the concatenation operator. |
| 2436 | */ |
| 2437 | STATIC regnode * |
| 2438 | S_regbranch(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, I32 first) |
| 2439 | { |
| 2440 | register regnode *ret; |
| 2441 | register regnode *chain = NULL; |
| 2442 | register regnode *latest; |
| 2443 | I32 flags = 0, c = 0; |
| 2444 | |
| 2445 | if (first) |
| 2446 | ret = NULL; |
| 2447 | else { |
| 2448 | if (!SIZE_ONLY && RExC_extralen) |
| 2449 | ret = reganode(pRExC_state, BRANCHJ,0); |
| 2450 | else { |
| 2451 | ret = reg_node(pRExC_state, BRANCH); |
| 2452 | Set_Node_Length(ret, 1); |
| 2453 | } |
| 2454 | } |
| 2455 | |
| 2456 | if (!first && SIZE_ONLY) |
| 2457 | RExC_extralen += 1; /* BRANCHJ */ |
| 2458 | |
| 2459 | *flagp = WORST; /* Tentatively. */ |
| 2460 | |
| 2461 | RExC_parse--; |
| 2462 | nextchar(pRExC_state); |
| 2463 | while (RExC_parse < RExC_end && *RExC_parse != '|' && *RExC_parse != ')') { |
| 2464 | flags &= ~TRYAGAIN; |
| 2465 | latest = regpiece(pRExC_state, &flags); |
| 2466 | if (latest == NULL) { |
| 2467 | if (flags & TRYAGAIN) |
| 2468 | continue; |
| 2469 | return(NULL); |
| 2470 | } |
| 2471 | else if (ret == NULL) |
| 2472 | ret = latest; |
| 2473 | *flagp |= flags&HASWIDTH; |
| 2474 | if (chain == NULL) /* First piece. */ |
| 2475 | *flagp |= flags&SPSTART; |
| 2476 | else { |
| 2477 | RExC_naughty++; |
| 2478 | regtail(pRExC_state, chain, latest); |
| 2479 | } |
| 2480 | chain = latest; |
| 2481 | c++; |
| 2482 | } |
| 2483 | if (chain == NULL) { /* Loop ran zero times. */ |
| 2484 | chain = reg_node(pRExC_state, NOTHING); |
| 2485 | if (ret == NULL) |
| 2486 | ret = chain; |
| 2487 | } |
| 2488 | if (c == 1) { |
| 2489 | *flagp |= flags&SIMPLE; |
| 2490 | } |
| 2491 | |
| 2492 | return(ret); |
| 2493 | } |
| 2494 | |
| 2495 | /* |
| 2496 | - regpiece - something followed by possible [*+?] |
| 2497 | * |
| 2498 | * Note that the branching code sequences used for ? and the general cases |
| 2499 | * of * and + are somewhat optimized: they use the same NOTHING node as |
| 2500 | * both the endmarker for their branch list and the body of the last branch. |
| 2501 | * It might seem that this node could be dispensed with entirely, but the |
| 2502 | * endmarker role is not redundant. |
| 2503 | */ |
| 2504 | STATIC regnode * |
| 2505 | S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp) |
| 2506 | { |
| 2507 | register regnode *ret; |
| 2508 | register char op; |
| 2509 | register char *next; |
| 2510 | I32 flags; |
| 2511 | char *origparse = RExC_parse; |
| 2512 | char *maxpos; |
| 2513 | I32 min; |
| 2514 | I32 max = REG_INFTY; |
| 2515 | char *parse_start; |
| 2516 | |
| 2517 | ret = regatom(pRExC_state, &flags); |
| 2518 | if (ret == NULL) { |
| 2519 | if (flags & TRYAGAIN) |
| 2520 | *flagp |= TRYAGAIN; |
| 2521 | return(NULL); |
| 2522 | } |
| 2523 | |
| 2524 | op = *RExC_parse; |
| 2525 | |
| 2526 | if (op == '{' && regcurly(RExC_parse)) { |
| 2527 | parse_start = RExC_parse; /* MJD */ |
| 2528 | next = RExC_parse + 1; |
| 2529 | maxpos = Nullch; |
| 2530 | while (isDIGIT(*next) || *next == ',') { |
| 2531 | if (*next == ',') { |
| 2532 | if (maxpos) |
| 2533 | break; |
| 2534 | else |
| 2535 | maxpos = next; |
| 2536 | } |
| 2537 | next++; |
| 2538 | } |
| 2539 | if (*next == '}') { /* got one */ |
| 2540 | if (!maxpos) |
| 2541 | maxpos = next; |
| 2542 | RExC_parse++; |
| 2543 | min = atoi(RExC_parse); |
| 2544 | if (*maxpos == ',') |
| 2545 | maxpos++; |
| 2546 | else |
| 2547 | maxpos = RExC_parse; |
| 2548 | max = atoi(maxpos); |
| 2549 | if (!max && *maxpos != '0') |
| 2550 | max = REG_INFTY; /* meaning "infinity" */ |
| 2551 | else if (max >= REG_INFTY) |
| 2552 | vFAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1); |
| 2553 | RExC_parse = next; |
| 2554 | nextchar(pRExC_state); |
| 2555 | |
| 2556 | do_curly: |
| 2557 | if ((flags&SIMPLE)) { |
| 2558 | RExC_naughty += 2 + RExC_naughty / 2; |
| 2559 | reginsert(pRExC_state, CURLY, ret); |
| 2560 | Set_Node_Offset(ret, parse_start+1); /* MJD */ |
| 2561 | Set_Node_Cur_Length(ret); |
| 2562 | } |
| 2563 | else { |
| 2564 | regnode *w = reg_node(pRExC_state, WHILEM); |
| 2565 | |
| 2566 | w->flags = 0; |
| 2567 | regtail(pRExC_state, ret, w); |
| 2568 | if (!SIZE_ONLY && RExC_extralen) { |
| 2569 | reginsert(pRExC_state, LONGJMP,ret); |
| 2570 | reginsert(pRExC_state, NOTHING,ret); |
| 2571 | NEXT_OFF(ret) = 3; /* Go over LONGJMP. */ |
| 2572 | } |
| 2573 | reginsert(pRExC_state, CURLYX,ret); |
| 2574 | /* MJD hk */ |
| 2575 | Set_Node_Offset(ret, parse_start+1); |
| 2576 | Set_Node_Length(ret, |
| 2577 | op == '{' ? (RExC_parse - parse_start) : 1); |
| 2578 | |
| 2579 | if (!SIZE_ONLY && RExC_extralen) |
| 2580 | NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */ |
| 2581 | regtail(pRExC_state, ret, reg_node(pRExC_state, NOTHING)); |
| 2582 | if (SIZE_ONLY) |
| 2583 | RExC_whilem_seen++, RExC_extralen += 3; |
| 2584 | RExC_naughty += 4 + RExC_naughty; /* compound interest */ |
| 2585 | } |
| 2586 | ret->flags = 0; |
| 2587 | |
| 2588 | if (min > 0) |
| 2589 | *flagp = WORST; |
| 2590 | if (max > 0) |
| 2591 | *flagp |= HASWIDTH; |
| 2592 | if (max && max < min) |
| 2593 | vFAIL("Can't do {n,m} with n > m"); |
| 2594 | if (!SIZE_ONLY) { |
| 2595 | ARG1_SET(ret, min); |
| 2596 | ARG2_SET(ret, max); |
| 2597 | } |
| 2598 | |
| 2599 | goto nest_check; |
| 2600 | } |
| 2601 | } |
| 2602 | |
| 2603 | if (!ISMULT1(op)) { |
| 2604 | *flagp = flags; |
| 2605 | return(ret); |
| 2606 | } |
| 2607 | |
| 2608 | #if 0 /* Now runtime fix should be reliable. */ |
| 2609 | |
| 2610 | /* if this is reinstated, don't forget to put this back into perldiag: |
| 2611 | |
| 2612 | =item Regexp *+ operand could be empty at {#} in regex m/%s/ |
| 2613 | |
| 2614 | (F) The part of the regexp subject to either the * or + quantifier |
| 2615 | could match an empty string. The {#} shows in the regular |
| 2616 | expression about where the problem was discovered. |
| 2617 | |
| 2618 | */ |
| 2619 | |
| 2620 | if (!(flags&HASWIDTH) && op != '?') |
| 2621 | vFAIL("Regexp *+ operand could be empty"); |
| 2622 | #endif |
| 2623 | |
| 2624 | parse_start = RExC_parse; |
| 2625 | nextchar(pRExC_state); |
| 2626 | |
| 2627 | *flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH); |
| 2628 | |
| 2629 | if (op == '*' && (flags&SIMPLE)) { |
| 2630 | reginsert(pRExC_state, STAR, ret); |
| 2631 | ret->flags = 0; |
| 2632 | RExC_naughty += 4; |
| 2633 | } |
| 2634 | else if (op == '*') { |
| 2635 | min = 0; |
| 2636 | goto do_curly; |
| 2637 | } |
| 2638 | else if (op == '+' && (flags&SIMPLE)) { |
| 2639 | reginsert(pRExC_state, PLUS, ret); |
| 2640 | ret->flags = 0; |
| 2641 | RExC_naughty += 3; |
| 2642 | } |
| 2643 | else if (op == '+') { |
| 2644 | min = 1; |
| 2645 | goto do_curly; |
| 2646 | } |
| 2647 | else if (op == '?') { |
| 2648 | min = 0; max = 1; |
| 2649 | goto do_curly; |
| 2650 | } |
| 2651 | nest_check: |
| 2652 | if (ckWARN(WARN_REGEXP) && !SIZE_ONLY && !(flags&HASWIDTH) && max > REG_INFTY/3) { |
| 2653 | vWARN3(RExC_parse, |
| 2654 | "%.*s matches null string many times", |
| 2655 | RExC_parse - origparse, |
| 2656 | origparse); |
| 2657 | } |
| 2658 | |
| 2659 | if (*RExC_parse == '?') { |
| 2660 | nextchar(pRExC_state); |
| 2661 | reginsert(pRExC_state, MINMOD, ret); |
| 2662 | regtail(pRExC_state, ret, ret + NODE_STEP_REGNODE); |
| 2663 | } |
| 2664 | if (ISMULT2(RExC_parse)) { |
| 2665 | RExC_parse++; |
| 2666 | vFAIL("Nested quantifiers"); |
| 2667 | } |
| 2668 | |
| 2669 | return(ret); |
| 2670 | } |
| 2671 | |
| 2672 | /* |
| 2673 | - regatom - the lowest level |
| 2674 | * |
| 2675 | * Optimization: gobbles an entire sequence of ordinary characters so that |
| 2676 | * it can turn them into a single node, which is smaller to store and |
| 2677 | * faster to run. Backslashed characters are exceptions, each becoming a |
| 2678 | * separate node; the code is simpler that way and it's not worth fixing. |
| 2679 | * |
| 2680 | * [Yes, it is worth fixing, some scripts can run twice the speed.] */ |
| 2681 | STATIC regnode * |
| 2682 | S_regatom(pTHX_ RExC_state_t *pRExC_state, I32 *flagp) |
| 2683 | { |
| 2684 | register regnode *ret = 0; |
| 2685 | I32 flags; |
| 2686 | char *parse_start = 0; |
| 2687 | |
| 2688 | *flagp = WORST; /* Tentatively. */ |
| 2689 | |
| 2690 | tryagain: |
| 2691 | switch (*RExC_parse) { |
| 2692 | case '^': |
| 2693 | RExC_seen_zerolen++; |
| 2694 | nextchar(pRExC_state); |
| 2695 | if (RExC_flags16 & PMf_MULTILINE) |
| 2696 | ret = reg_node(pRExC_state, MBOL); |
| 2697 | else if (RExC_flags16 & PMf_SINGLELINE) |
| 2698 | ret = reg_node(pRExC_state, SBOL); |
| 2699 | else |
| 2700 | ret = reg_node(pRExC_state, BOL); |
| 2701 | Set_Node_Length(ret, 1); /* MJD */ |
| 2702 | break; |
| 2703 | case '$': |
| 2704 | nextchar(pRExC_state); |
| 2705 | if (*RExC_parse) |
| 2706 | RExC_seen_zerolen++; |
| 2707 | if (RExC_flags16 & PMf_MULTILINE) |
| 2708 | ret = reg_node(pRExC_state, MEOL); |
| 2709 | else if (RExC_flags16 & PMf_SINGLELINE) |
| 2710 | ret = reg_node(pRExC_state, SEOL); |
| 2711 | else |
| 2712 | ret = reg_node(pRExC_state, EOL); |
| 2713 | Set_Node_Length(ret, 1); /* MJD */ |
| 2714 | break; |
| 2715 | case '.': |
| 2716 | nextchar(pRExC_state); |
| 2717 | if (RExC_flags16 & PMf_SINGLELINE) |
| 2718 | ret = reg_node(pRExC_state, SANY); |
| 2719 | else |
| 2720 | ret = reg_node(pRExC_state, REG_ANY); |
| 2721 | *flagp |= HASWIDTH|SIMPLE; |
| 2722 | RExC_naughty++; |
| 2723 | Set_Node_Length(ret, 1); /* MJD */ |
| 2724 | break; |
| 2725 | case '[': |
| 2726 | { |
| 2727 | char *oregcomp_parse = ++RExC_parse; |
| 2728 | ret = regclass(pRExC_state); |
| 2729 | if (*RExC_parse != ']') { |
| 2730 | RExC_parse = oregcomp_parse; |
| 2731 | vFAIL("Unmatched ["); |
| 2732 | } |
| 2733 | nextchar(pRExC_state); |
| 2734 | *flagp |= HASWIDTH|SIMPLE; |
| 2735 | Set_Node_Length(ret, RExC_parse - oregcomp_parse + 1); /* MJD */ |
| 2736 | break; |
| 2737 | } |
| 2738 | case '(': |
| 2739 | nextchar(pRExC_state); |
| 2740 | ret = reg(pRExC_state, 1, &flags); |
| 2741 | if (ret == NULL) { |
| 2742 | if (flags & TRYAGAIN) { |
| 2743 | if (RExC_parse == RExC_end) { |
| 2744 | /* Make parent create an empty node if needed. */ |
| 2745 | *flagp |= TRYAGAIN; |
| 2746 | return(NULL); |
| 2747 | } |
| 2748 | goto tryagain; |
| 2749 | } |
| 2750 | return(NULL); |
| 2751 | } |
| 2752 | *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE); |
| 2753 | break; |
| 2754 | case '|': |
| 2755 | case ')': |
| 2756 | if (flags & TRYAGAIN) { |
| 2757 | *flagp |= TRYAGAIN; |
| 2758 | return NULL; |
| 2759 | } |
| 2760 | vFAIL("Internal urp"); |
| 2761 | /* Supposed to be caught earlier. */ |
| 2762 | break; |
| 2763 | case '{': |
| 2764 | if (!regcurly(RExC_parse)) { |
| 2765 | RExC_parse++; |
| 2766 | goto defchar; |
| 2767 | } |
| 2768 | /* FALL THROUGH */ |
| 2769 | case '?': |
| 2770 | case '+': |
| 2771 | case '*': |
| 2772 | RExC_parse++; |
| 2773 | vFAIL("Quantifier follows nothing"); |
| 2774 | break; |
| 2775 | case '\\': |
| 2776 | switch (*++RExC_parse) { |
| 2777 | case 'A': |
| 2778 | RExC_seen_zerolen++; |
| 2779 | ret = reg_node(pRExC_state, SBOL); |
| 2780 | *flagp |= SIMPLE; |
| 2781 | nextchar(pRExC_state); |
| 2782 | Set_Node_Length(ret, 2); /* MJD */ |
| 2783 | break; |
| 2784 | case 'G': |
| 2785 | ret = reg_node(pRExC_state, GPOS); |
| 2786 | RExC_seen |= REG_SEEN_GPOS; |
| 2787 | *flagp |= SIMPLE; |
| 2788 | nextchar(pRExC_state); |
| 2789 | Set_Node_Length(ret, 2); /* MJD */ |
| 2790 | break; |
| 2791 | case 'Z': |
| 2792 | ret = reg_node(pRExC_state, SEOL); |
| 2793 | *flagp |= SIMPLE; |
| 2794 | nextchar(pRExC_state); |
| 2795 | break; |
| 2796 | case 'z': |
| 2797 | ret = reg_node(pRExC_state, EOS); |
| 2798 | *flagp |= SIMPLE; |
| 2799 | RExC_seen_zerolen++; /* Do not optimize RE away */ |
| 2800 | nextchar(pRExC_state); |
| 2801 | Set_Node_Length(ret, 2); /* MJD */ |
| 2802 | break; |
| 2803 | case 'C': |
| 2804 | ret = reg_node(pRExC_state, CANY); |
| 2805 | RExC_seen |= REG_SEEN_CANY; |
| 2806 | *flagp |= HASWIDTH|SIMPLE; |
| 2807 | nextchar(pRExC_state); |
| 2808 | Set_Node_Length(ret, 2); /* MJD */ |
| 2809 | break; |
| 2810 | case 'X': |
| 2811 | ret = reg_node(pRExC_state, CLUMP); |
| 2812 | *flagp |= HASWIDTH; |
| 2813 | nextchar(pRExC_state); |
| 2814 | Set_Node_Length(ret, 2); /* MJD */ |
| 2815 | break; |
| 2816 | case 'w': |
| 2817 | ret = reg_node(pRExC_state, LOC ? ALNUML : ALNUM); |
| 2818 | *flagp |= HASWIDTH|SIMPLE; |
| 2819 | nextchar(pRExC_state); |
| 2820 | Set_Node_Length(ret, 2); /* MJD */ |
| 2821 | break; |
| 2822 | case 'W': |
| 2823 | ret = reg_node(pRExC_state, LOC ? NALNUML : NALNUM); |
| 2824 | *flagp |= HASWIDTH|SIMPLE; |
| 2825 | nextchar(pRExC_state); |
| 2826 | Set_Node_Length(ret, 2); /* MJD */ |
| 2827 | break; |
| 2828 | case 'b': |
| 2829 | RExC_seen_zerolen++; |
| 2830 | RExC_seen |= REG_SEEN_LOOKBEHIND; |
| 2831 | ret = reg_node(pRExC_state, LOC ? BOUNDL : BOUND); |
| 2832 | *flagp |= SIMPLE; |
| 2833 | nextchar(pRExC_state); |
| 2834 | Set_Node_Length(ret, 2); /* MJD */ |
| 2835 | break; |
| 2836 | case 'B': |
| 2837 | RExC_seen_zerolen++; |
| 2838 | RExC_seen |= REG_SEEN_LOOKBEHIND; |
| 2839 | ret = reg_node(pRExC_state, LOC ? NBOUNDL : NBOUND); |
| 2840 | *flagp |= SIMPLE; |
| 2841 | nextchar(pRExC_state); |
| 2842 | Set_Node_Length(ret, 2); /* MJD */ |
| 2843 | break; |
| 2844 | case 's': |
| 2845 | ret = reg_node(pRExC_state, LOC ? SPACEL : SPACE); |
| 2846 | *flagp |= HASWIDTH|SIMPLE; |
| 2847 | nextchar(pRExC_state); |
| 2848 | Set_Node_Length(ret, 2); /* MJD */ |
| 2849 | break; |
| 2850 | case 'S': |
| 2851 | ret = reg_node(pRExC_state, LOC ? NSPACEL : NSPACE); |
| 2852 | *flagp |= HASWIDTH|SIMPLE; |
| 2853 | nextchar(pRExC_state); |
| 2854 | Set_Node_Length(ret, 2); /* MJD */ |
| 2855 | break; |
| 2856 | case 'd': |
| 2857 | ret = reg_node(pRExC_state, DIGIT); |
| 2858 | *flagp |= HASWIDTH|SIMPLE; |
| 2859 | nextchar(pRExC_state); |
| 2860 | Set_Node_Length(ret, 2); /* MJD */ |
| 2861 | break; |
| 2862 | case 'D': |
| 2863 | ret = reg_node(pRExC_state, NDIGIT); |
| 2864 | *flagp |= HASWIDTH|SIMPLE; |
| 2865 | nextchar(pRExC_state); |
| 2866 | Set_Node_Length(ret, 2); /* MJD */ |
| 2867 | break; |
| 2868 | case 'p': |
| 2869 | case 'P': |
| 2870 | { |
| 2871 | char* oldregxend = RExC_end; |
| 2872 | char* parse_start = RExC_parse; |
| 2873 | |
| 2874 | if (RExC_parse[1] == '{') { |
| 2875 | /* a lovely hack--pretend we saw [\pX] instead */ |
| 2876 | RExC_end = strchr(RExC_parse, '}'); |
| 2877 | if (!RExC_end) { |
| 2878 | RExC_parse += 2; |
| 2879 | RExC_end = oldregxend; |
| 2880 | vFAIL("Missing right brace on \\p{}"); |
| 2881 | } |
| 2882 | RExC_end++; |
| 2883 | } |
| 2884 | else |
| 2885 | RExC_end = RExC_parse + 2; |
| 2886 | RExC_parse--; |
| 2887 | |
| 2888 | ret = regclass(pRExC_state); |
| 2889 | |
| 2890 | RExC_end = oldregxend; |
| 2891 | RExC_parse--; |
| 2892 | Set_Node_Cur_Length(ret); /* MJD */ |
| 2893 | nextchar(pRExC_state); |
| 2894 | *flagp |= HASWIDTH|SIMPLE; |
| 2895 | } |
| 2896 | break; |
| 2897 | case 'n': |
| 2898 | case 'r': |
| 2899 | case 't': |
| 2900 | case 'f': |
| 2901 | case 'e': |
| 2902 | case 'a': |
| 2903 | case 'x': |
| 2904 | case 'c': |
| 2905 | case '0': |
| 2906 | goto defchar; |
| 2907 | case '1': case '2': case '3': case '4': |
| 2908 | case '5': case '6': case '7': case '8': case '9': |
| 2909 | { |
| 2910 | I32 num = atoi(RExC_parse); |
| 2911 | |
| 2912 | if (num > 9 && num >= RExC_npar) |
| 2913 | goto defchar; |
| 2914 | else { |
| 2915 | char * parse_start = RExC_parse - 1; /* MJD */ |
| 2916 | while (isDIGIT(*RExC_parse)) |
| 2917 | RExC_parse++; |
| 2918 | |
| 2919 | if (!SIZE_ONLY && num > RExC_rx->nparens) |
| 2920 | vFAIL("Reference to nonexistent group"); |
| 2921 | RExC_sawback = 1; |
| 2922 | ret = reganode(pRExC_state, FOLD |
| 2923 | ? (LOC ? REFFL : REFF) |
| 2924 | : REF, num); |
| 2925 | *flagp |= HASWIDTH; |
| 2926 | |
| 2927 | /* override incorrect value set in reganode MJD */ |
| 2928 | Set_Node_Offset(ret, parse_start+1); |
| 2929 | Set_Node_Cur_Length(ret); /* MJD */ |
| 2930 | RExC_parse--; |
| 2931 | nextchar(pRExC_state); |
| 2932 | } |
| 2933 | } |
| 2934 | break; |
| 2935 | case '\0': |
| 2936 | if (RExC_parse >= RExC_end) |
| 2937 | FAIL("Trailing \\"); |
| 2938 | /* FALL THROUGH */ |
| 2939 | default: |
| 2940 | /* Do not generate `unrecognized' warnings here, we fall |
| 2941 | back into the quick-grab loop below */ |
| 2942 | goto defchar; |
| 2943 | } |
| 2944 | break; |
| 2945 | |
| 2946 | case '#': |
| 2947 | if (RExC_flags16 & PMf_EXTENDED) { |
| 2948 | while (RExC_parse < RExC_end && *RExC_parse != '\n') RExC_parse++; |
| 2949 | if (RExC_parse < RExC_end) |
| 2950 | goto tryagain; |
| 2951 | } |
| 2952 | /* FALL THROUGH */ |
| 2953 | |
| 2954 | default: { |
| 2955 | register STRLEN len; |
| 2956 | register UV ender; |
| 2957 | register char *p; |
| 2958 | char *oldp, *s; |
| 2959 | STRLEN numlen; |
| 2960 | |
| 2961 | parse_start = RExC_parse - 1; |
| 2962 | |
| 2963 | RExC_parse++; |
| 2964 | |
| 2965 | defchar: |
| 2966 | ret = reg_node(pRExC_state, FOLD |
| 2967 | ? (LOC ? EXACTFL : EXACTF) |
| 2968 | : EXACT); |
| 2969 | s = STRING(ret); |
| 2970 | for (len = 0, p = RExC_parse - 1; |
| 2971 | len < 127 && p < RExC_end; |
| 2972 | len++) |
| 2973 | { |
| 2974 | oldp = p; |
| 2975 | |
| 2976 | if (RExC_flags16 & PMf_EXTENDED) |
| 2977 | p = regwhite(p, RExC_end); |
| 2978 | switch (*p) { |
| 2979 | case '^': |
| 2980 | case '$': |
| 2981 | case '.': |
| 2982 | case '[': |
| 2983 | case '(': |
| 2984 | case ')': |
| 2985 | case '|': |
| 2986 | goto loopdone; |
| 2987 | case '\\': |
| 2988 | switch (*++p) { |
| 2989 | case 'A': |
| 2990 | case 'G': |
| 2991 | case 'Z': |
| 2992 | case 'z': |
| 2993 | case 'w': |
| 2994 | case 'W': |
| 2995 | case 'b': |
| 2996 | case 'B': |
| 2997 | case 's': |
| 2998 | case 'S': |
| 2999 | case 'd': |
| 3000 | case 'D': |
| 3001 | case 'p': |
| 3002 | case 'P': |
| 3003 | --p; |
| 3004 | goto loopdone; |
| 3005 | case 'n': |
| 3006 | ender = '\n'; |
| 3007 | p++; |
| 3008 | break; |
| 3009 | case 'r': |
| 3010 | ender = '\r'; |
| 3011 | p++; |
| 3012 | break; |
| 3013 | case 't': |
| 3014 | ender = '\t'; |
| 3015 | p++; |
| 3016 | break; |
| 3017 | case 'f': |
| 3018 | ender = '\f'; |
| 3019 | p++; |
| 3020 | break; |
| 3021 | case 'e': |
| 3022 | ender = ASCII_TO_NATIVE('\033'); |
| 3023 | p++; |
| 3024 | break; |
| 3025 | case 'a': |
| 3026 | ender = ASCII_TO_NATIVE('\007'); |
| 3027 | p++; |
| 3028 | break; |
| 3029 | case 'x': |
| 3030 | if (*++p == '{') { |
| 3031 | char* e = strchr(p, '}'); |
| 3032 | |
| 3033 | if (!e) { |
| 3034 | RExC_parse = p + 1; |
| 3035 | vFAIL("Missing right brace on \\x{}"); |
| 3036 | } |
| 3037 | else { |
| 3038 | numlen = 1; /* allow underscores */ |
| 3039 | ender = (UV)scan_hex(p + 1, e - p - 1, &numlen); |
| 3040 | if (ender > 0xff) |
| 3041 | RExC_utf8 = 1; |
| 3042 | /* numlen is generous */ |
| 3043 | if (numlen + len >= 127) { |
| 3044 | p--; |
| 3045 | goto loopdone; |
| 3046 | } |
| 3047 | p = e + 1; |
| 3048 | } |
| 3049 | } |
| 3050 | else { |
| 3051 | numlen = 0; /* disallow underscores */ |
| 3052 | ender = (UV)scan_hex(p, 2, &numlen); |
| 3053 | p += numlen; |
| 3054 | } |
| 3055 | break; |
| 3056 | case 'c': |
| 3057 | p++; |
| 3058 | ender = UCHARAT(p++); |
| 3059 | ender = toCTRL(ender); |
| 3060 | break; |
| 3061 | case '0': case '1': case '2': case '3':case '4': |
| 3062 | case '5': case '6': case '7': case '8':case '9': |
| 3063 | if (*p == '0' || |
| 3064 | (isDIGIT(p[1]) && atoi(p) >= RExC_npar) ) { |
| 3065 | numlen = 0; /* disallow underscores */ |
| 3066 | ender = (UV)scan_oct(p, 3, &numlen); |
| 3067 | p += numlen; |
| 3068 | } |
| 3069 | else { |
| 3070 | --p; |
| 3071 | goto loopdone; |
| 3072 | } |
| 3073 | break; |
| 3074 | case '\0': |
| 3075 | if (p >= RExC_end) |
| 3076 | FAIL("Trailing \\"); |
| 3077 | /* FALL THROUGH */ |
| 3078 | default: |
| 3079 | if (!SIZE_ONLY && ckWARN(WARN_REGEXP) && isALPHA(*p)) |
| 3080 | vWARN2(p +1, "Unrecognized escape \\%c passed through", *p); |
| 3081 | goto normal_default; |
| 3082 | } |
| 3083 | break; |
| 3084 | default: |
| 3085 | normal_default: |
| 3086 | if (UTF8_IS_START(*p) && UTF) { |
| 3087 | ender = utf8n_to_uvchr((U8*)p, RExC_end - p, |
| 3088 | &numlen, 0); |
| 3089 | p += numlen; |
| 3090 | } |
| 3091 | else |
| 3092 | ender = *p++; |
| 3093 | break; |
| 3094 | } |
| 3095 | if (RExC_flags16 & PMf_EXTENDED) |
| 3096 | p = regwhite(p, RExC_end); |
| 3097 | if (UTF && FOLD) { |
| 3098 | if (LOC) |
| 3099 | ender = toLOWER_LC_uvchr(ender); |
| 3100 | else |
| 3101 | ender = toLOWER_uni(ender); |
| 3102 | } |
| 3103 | if (ISMULT2(p)) { /* Back off on ?+*. */ |
| 3104 | if (len) |
| 3105 | p = oldp; |
| 3106 | else if (!UNI_IS_INVARIANT(NATIVE_TO_UNI(ender)) && UTF) { |
| 3107 | reguni(pRExC_state, ender, s, &numlen); |
| 3108 | s += numlen; |
| 3109 | len += numlen; |
| 3110 | } |
| 3111 | else { |
| 3112 | len++; |
| 3113 | REGC(ender, s++); |
| 3114 | } |
| 3115 | break; |
| 3116 | } |
| 3117 | if (!UNI_IS_INVARIANT(NATIVE_TO_UNI(ender)) && UTF) { |
| 3118 | reguni(pRExC_state, ender, s, &numlen); |
| 3119 | s += numlen; |
| 3120 | len += numlen - 1; |
| 3121 | } |
| 3122 | else |
| 3123 | REGC(ender, s++); |
| 3124 | } |
| 3125 | loopdone: |
| 3126 | RExC_parse = p - 1; |
| 3127 | Set_Node_Cur_Length(ret); /* MJD */ |
| 3128 | nextchar(pRExC_state); |
| 3129 | { |
| 3130 | /* len is STRLEN which is unsigned, need to copy to signed */ |
| 3131 | IV iv = len; |
| 3132 | if (iv < 0) |
| 3133 | vFAIL("Internal disaster"); |
| 3134 | } |
| 3135 | if (len > 0) |
| 3136 | *flagp |= HASWIDTH; |
| 3137 | if (len == 1) |
| 3138 | *flagp |= SIMPLE; |
| 3139 | if (!SIZE_ONLY) |
| 3140 | STR_LEN(ret) = len; |
| 3141 | if (SIZE_ONLY) |
| 3142 | RExC_size += STR_SZ(len); |
| 3143 | else |
| 3144 | RExC_emit += STR_SZ(len); |
| 3145 | } |
| 3146 | break; |
| 3147 | } |
| 3148 | |
| 3149 | return(ret); |
| 3150 | } |
| 3151 | |
| 3152 | STATIC char * |
| 3153 | S_regwhite(pTHX_ char *p, char *e) |
| 3154 | { |
| 3155 | while (p < e) { |
| 3156 | if (isSPACE(*p)) |
| 3157 | ++p; |
| 3158 | else if (*p == '#') { |
| 3159 | do { |
| 3160 | p++; |
| 3161 | } while (p < e && *p != '\n'); |
| 3162 | } |
| 3163 | else |
| 3164 | break; |
| 3165 | } |
| 3166 | return p; |
| 3167 | } |
| 3168 | |
| 3169 | /* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]]. |
| 3170 | Character classes ([:foo:]) can also be negated ([:^foo:]). |
| 3171 | Returns a named class id (ANYOF_XXX) if successful, -1 otherwise. |
| 3172 | Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed, |
| 3173 | but trigger warnings because they are currently unimplemented. */ |
| 3174 | STATIC I32 |
| 3175 | S_regpposixcc(pTHX_ RExC_state_t *pRExC_state, I32 value) |
| 3176 | { |
| 3177 | char *posixcc = 0; |
| 3178 | I32 namedclass = OOB_NAMEDCLASS; |
| 3179 | |
| 3180 | if (value == '[' && RExC_parse + 1 < RExC_end && |
| 3181 | /* I smell either [: or [= or [. -- POSIX has been here, right? */ |
| 3182 | (*RExC_parse == ':' || |
| 3183 | *RExC_parse == '=' || |
| 3184 | *RExC_parse == '.')) { |
| 3185 | char c = *RExC_parse; |
| 3186 | char* s = RExC_parse++; |
| 3187 | |
| 3188 | while (RExC_parse < RExC_end && *RExC_parse != c) |
| 3189 | RExC_parse++; |
| 3190 | if (RExC_parse == RExC_end) |
| 3191 | /* Grandfather lone [:, [=, [. */ |
| 3192 | RExC_parse = s; |
| 3193 | else { |
| 3194 | char* t = RExC_parse++; /* skip over the c */ |
| 3195 | |
| 3196 | if (*RExC_parse == ']') { |
| 3197 | RExC_parse++; /* skip over the ending ] */ |
| 3198 | posixcc = s + 1; |
| 3199 | if (*s == ':') { |
| 3200 | I32 complement = *posixcc == '^' ? *posixcc++ : 0; |
| 3201 | I32 skip = 5; /* the most common skip */ |
| 3202 | |
| 3203 | switch (*posixcc) { |
| 3204 | case 'a': |
| 3205 | if (strnEQ(posixcc, "alnum", 5)) |
| 3206 | namedclass = |
| 3207 | complement ? ANYOF_NALNUMC : ANYOF_ALNUMC; |
| 3208 | else if (strnEQ(posixcc, "alpha", 5)) |
| 3209 | namedclass = |
| 3210 | complement ? ANYOF_NALPHA : ANYOF_ALPHA; |
| 3211 | else if (strnEQ(posixcc, "ascii", 5)) |
| 3212 | namedclass = |
| 3213 | complement ? ANYOF_NASCII : ANYOF_ASCII; |
| 3214 | break; |
| 3215 | case 'b': |
| 3216 | if (strnEQ(posixcc, "blank", 5)) |
| 3217 | namedclass = |
| 3218 | complement ? ANYOF_NBLANK : ANYOF_BLANK; |
| 3219 | break; |
| 3220 | case 'c': |
| 3221 | if (strnEQ(posixcc, "cntrl", 5)) |
| 3222 | namedclass = |
| 3223 | complement ? ANYOF_NCNTRL : ANYOF_CNTRL; |
| 3224 | break; |
| 3225 | case 'd': |
| 3226 | if (strnEQ(posixcc, "digit", 5)) |
| 3227 | namedclass = |
| 3228 | complement ? ANYOF_NDIGIT : ANYOF_DIGIT; |
| 3229 | break; |
| 3230 | case 'g': |
| 3231 | if (strnEQ(posixcc, "graph", 5)) |
| 3232 | namedclass = |
| 3233 | complement ? ANYOF_NGRAPH : ANYOF_GRAPH; |
| 3234 | break; |
| 3235 | case 'l': |
| 3236 | if (strnEQ(posixcc, "lower", 5)) |
| 3237 | namedclass = |
| 3238 | complement ? ANYOF_NLOWER : ANYOF_LOWER; |
| 3239 | break; |
| 3240 | case 'p': |
| 3241 | if (strnEQ(posixcc, "print", 5)) |
| 3242 | namedclass = |
| 3243 | complement ? ANYOF_NPRINT : ANYOF_PRINT; |
| 3244 | else if (strnEQ(posixcc, "punct", 5)) |
| 3245 | namedclass = |
| 3246 | complement ? ANYOF_NPUNCT : ANYOF_PUNCT; |
| 3247 | break; |
| 3248 | case 's': |
| 3249 | if (strnEQ(posixcc, "space", 5)) |
| 3250 | namedclass = |
| 3251 | complement ? ANYOF_NPSXSPC : ANYOF_PSXSPC; |
| 3252 | break; |
| 3253 | case 'u': |
| 3254 | if (strnEQ(posixcc, "upper", 5)) |
| 3255 | namedclass = |
| 3256 | complement ? ANYOF_NUPPER : ANYOF_UPPER; |
| 3257 | break; |
| 3258 | case 'w': /* this is not POSIX, this is the Perl \w */ |
| 3259 | if (strnEQ(posixcc, "word", 4)) { |
| 3260 | namedclass = |
| 3261 | complement ? ANYOF_NALNUM : ANYOF_ALNUM; |
| 3262 | skip = 4; |
| 3263 | } |
| 3264 | break; |
| 3265 | case 'x': |
| 3266 | if (strnEQ(posixcc, "xdigit", 6)) { |
| 3267 | namedclass = |
| 3268 | complement ? ANYOF_NXDIGIT : ANYOF_XDIGIT; |
| 3269 | skip = 6; |
| 3270 | } |
| 3271 | break; |
| 3272 | } |
| 3273 | if (namedclass == OOB_NAMEDCLASS || |
| 3274 | posixcc[skip] != ':' || |
| 3275 | posixcc[skip+1] != ']') |
| 3276 | { |
| 3277 | Simple_vFAIL3("POSIX class [:%.*s:] unknown", |
| 3278 | t - s - 1, s + 1); |
| 3279 | } |
| 3280 | } else if (!SIZE_ONLY) { |
| 3281 | /* [[=foo=]] and [[.foo.]] are still future. */ |
| 3282 | |
| 3283 | /* adjust RExC_parse so the warning shows after |
| 3284 | the class closes */ |
| 3285 | while (*RExC_parse && *RExC_parse != ']') |
| 3286 | RExC_parse++; |
| 3287 | Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c); |
| 3288 | } |
| 3289 | } else { |
| 3290 | /* Maternal grandfather: |
| 3291 | * "[:" ending in ":" but not in ":]" */ |
| 3292 | RExC_parse = s; |
| 3293 | } |
| 3294 | } |
| 3295 | } |
| 3296 | |
| 3297 | return namedclass; |
| 3298 | } |
| 3299 | |
| 3300 | STATIC void |
| 3301 | S_checkposixcc(pTHX_ RExC_state_t *pRExC_state) |
| 3302 | { |
| 3303 | if (!SIZE_ONLY && ckWARN(WARN_REGEXP) && |
| 3304 | (*RExC_parse == ':' || |
| 3305 | *RExC_parse == '=' || |
| 3306 | *RExC_parse == '.')) { |
| 3307 | char *s = RExC_parse; |
| 3308 | char c = *s++; |
| 3309 | |
| 3310 | while(*s && isALNUM(*s)) |
| 3311 | s++; |
| 3312 | if (*s && c == *s && s[1] == ']') { |
| 3313 | vWARN3(s+2, "POSIX syntax [%c %c] belongs inside character classes", c, c); |
| 3314 | |
| 3315 | /* [[=foo=]] and [[.foo.]] are still future. */ |
| 3316 | if (c == '=' || c == '.') |
| 3317 | { |
| 3318 | /* adjust RExC_parse so the error shows after |
| 3319 | the class closes */ |
| 3320 | while (*RExC_parse && *RExC_parse++ != ']') |
| 3321 | ; |
| 3322 | Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c); |
| 3323 | } |
| 3324 | } |
| 3325 | } |
| 3326 | } |
| 3327 | |
| 3328 | STATIC regnode * |
| 3329 | S_regclass(pTHX_ RExC_state_t *pRExC_state) |
| 3330 | { |
| 3331 | register UV value; |
| 3332 | register IV prevvalue = OOB_UNICODE; |
| 3333 | register IV range = 0; |
| 3334 | register regnode *ret; |
| 3335 | STRLEN numlen; |
| 3336 | IV namedclass; |
| 3337 | char *rangebegin = 0; |
| 3338 | bool need_class = 0; |
| 3339 | SV *listsv = Nullsv; |
| 3340 | register char *e; |
| 3341 | UV n; |
| 3342 | bool optimize_invert = TRUE; |
| 3343 | |
| 3344 | ret = reganode(pRExC_state, ANYOF, 0); |
| 3345 | |
| 3346 | if (!SIZE_ONLY) |
| 3347 | ANYOF_FLAGS(ret) = 0; |
| 3348 | |
| 3349 | if (*RExC_parse == '^') { /* Complement of range. */ |
| 3350 | RExC_naughty++; |
| 3351 | RExC_parse++; |
| 3352 | if (!SIZE_ONLY) |
| 3353 | ANYOF_FLAGS(ret) |= ANYOF_INVERT; |
| 3354 | } |
| 3355 | |
| 3356 | if (SIZE_ONLY) |
| 3357 | RExC_size += ANYOF_SKIP; |
| 3358 | else { |
| 3359 | RExC_emit += ANYOF_SKIP; |
| 3360 | if (FOLD) |
| 3361 | ANYOF_FLAGS(ret) |= ANYOF_FOLD; |
| 3362 | if (LOC) |
| 3363 | ANYOF_FLAGS(ret) |= ANYOF_LOCALE; |
| 3364 | ANYOF_BITMAP_ZERO(ret); |
| 3365 | listsv = newSVpvn("# comment\n", 10); |
| 3366 | } |
| 3367 | |
| 3368 | if (!SIZE_ONLY && ckWARN(WARN_REGEXP)) |
| 3369 | checkposixcc(pRExC_state); |
| 3370 | |
| 3371 | if (*RExC_parse == ']' || *RExC_parse == '-') |
| 3372 | goto charclassloop; /* allow 1st char to be ] or - */ |
| 3373 | |
| 3374 | while (RExC_parse < RExC_end && *RExC_parse != ']') { |
| 3375 | |
| 3376 | charclassloop: |
| 3377 | |
| 3378 | namedclass = OOB_NAMEDCLASS; /* initialize as illegal */ |
| 3379 | |
| 3380 | if (!range) |
| 3381 | rangebegin = RExC_parse; |
| 3382 | if (UTF) { |
| 3383 | value = utf8n_to_uvchr((U8*)RExC_parse, |
| 3384 | RExC_end - RExC_parse, |
| 3385 | &numlen, 0); |
| 3386 | RExC_parse += numlen; |
| 3387 | } |
| 3388 | else |
| 3389 | value = UCHARAT(RExC_parse++); |
| 3390 | if (value == '[') |
| 3391 | namedclass = regpposixcc(pRExC_state, value); |
| 3392 | else if (value == '\\') { |
| 3393 | if (UTF) { |
| 3394 | value = utf8n_to_uvchr((U8*)RExC_parse, |
| 3395 | RExC_end - RExC_parse, |
| 3396 | &numlen, 0); |
| 3397 | RExC_parse += numlen; |
| 3398 | } |
| 3399 | else |
| 3400 | value = UCHARAT(RExC_parse++); |
| 3401 | /* Some compilers cannot handle switching on 64-bit integer |
| 3402 | * values, therefore value cannot be an UV. Yes, this will |
| 3403 | * be a problem later if we want switch on Unicode. |
| 3404 | * A similar issue a little bit later when switching on |
| 3405 | * namedclass. --jhi */ |
| 3406 | switch ((I32)value) { |
| 3407 | case 'w': namedclass = ANYOF_ALNUM; break; |
| 3408 | case 'W': namedclass = ANYOF_NALNUM; break; |
| 3409 | case 's': namedclass = ANYOF_SPACE; break; |
| 3410 | case 'S': namedclass = ANYOF_NSPACE; break; |
| 3411 | case 'd': namedclass = ANYOF_DIGIT; break; |
| 3412 | case 'D': namedclass = ANYOF_NDIGIT; break; |
| 3413 | case 'p': |
| 3414 | case 'P': |
| 3415 | if (*RExC_parse == '{') { |
| 3416 | e = strchr(RExC_parse++, '}'); |
| 3417 | if (!e) |
| 3418 | vFAIL("Missing right brace on \\p{}"); |
| 3419 | n = e - RExC_parse; |
| 3420 | } |
| 3421 | else { |
| 3422 | e = RExC_parse; |
| 3423 | n = 1; |
| 3424 | } |
| 3425 | if (!SIZE_ONLY) { |
| 3426 | if (value == 'p') |
| 3427 | Perl_sv_catpvf(aTHX_ listsv, |
| 3428 | "+utf8::%.*s\n", (int)n, RExC_parse); |
| 3429 | else |
| 3430 | Perl_sv_catpvf(aTHX_ listsv, |
| 3431 | "!utf8::%.*s\n", (int)n, RExC_parse); |
| 3432 | } |
| 3433 | RExC_parse = e + 1; |
| 3434 | ANYOF_FLAGS(ret) |= ANYOF_UNICODE; |
| 3435 | continue; |
| 3436 | case 'n': value = '\n'; break; |
| 3437 | case 'r': value = '\r'; break; |
| 3438 | case 't': value = '\t'; break; |
| 3439 | case 'f': value = '\f'; break; |
| 3440 | case 'b': value = '\b'; break; |
| 3441 | case 'e': value = ASCII_TO_NATIVE('\033');break; |
| 3442 | case 'a': value = ASCII_TO_NATIVE('\007');break; |
| 3443 | case 'x': |
| 3444 | if (*RExC_parse == '{') { |
| 3445 | e = strchr(RExC_parse++, '}'); |
| 3446 | if (!e) |
| 3447 | vFAIL("Missing right brace on \\x{}"); |
| 3448 | numlen = 1; /* allow underscores */ |
| 3449 | value = (UV)scan_hex(RExC_parse, |
| 3450 | e - RExC_parse, |
| 3451 | &numlen); |
| 3452 | RExC_parse = e + 1; |
| 3453 | } |
| 3454 | else { |
| 3455 | numlen = 0; /* disallow underscores */ |
| 3456 | value = (UV)scan_hex(RExC_parse, 2, &numlen); |
| 3457 | RExC_parse += numlen; |
| 3458 | } |
| 3459 | break; |
| 3460 | case 'c': |
| 3461 | value = UCHARAT(RExC_parse++); |
| 3462 | value = toCTRL(value); |
| 3463 | break; |
| 3464 | case '0': case '1': case '2': case '3': case '4': |
| 3465 | case '5': case '6': case '7': case '8': case '9': |
| 3466 | numlen = 0; /* disallow underscores */ |
| 3467 | value = (UV)scan_oct(--RExC_parse, 3, &numlen); |
| 3468 | RExC_parse += numlen; |
| 3469 | break; |
| 3470 | default: |
| 3471 | if (!SIZE_ONLY && ckWARN(WARN_REGEXP) && isALPHA(value)) |
| 3472 | vWARN2(RExC_parse, |
| 3473 | "Unrecognized escape \\%c in character class passed through", |
| 3474 | (int)value); |
| 3475 | break; |
| 3476 | } |
| 3477 | } /* end of \blah */ |
| 3478 | |
| 3479 | if (namedclass > OOB_NAMEDCLASS) { /* this is a named class \blah */ |
| 3480 | |
| 3481 | if (!SIZE_ONLY && !need_class) |
| 3482 | ANYOF_CLASS_ZERO(ret); |
| 3483 | |
| 3484 | need_class = 1; |
| 3485 | |
| 3486 | /* a bad range like a-\d, a-[:digit:] ? */ |
| 3487 | if (range) { |
| 3488 | if (!SIZE_ONLY) { |
| 3489 | if (ckWARN(WARN_REGEXP)) |
| 3490 | vWARN4(RExC_parse, |
| 3491 | "False [] range \"%*.*s\"", |
| 3492 | RExC_parse - rangebegin, |
| 3493 | RExC_parse - rangebegin, |
| 3494 | rangebegin); |
| 3495 | if (prevvalue < 256) { |
| 3496 | ANYOF_BITMAP_SET(ret, prevvalue); |
| 3497 | ANYOF_BITMAP_SET(ret, '-'); |
| 3498 | } |
| 3499 | else { |
| 3500 | ANYOF_FLAGS(ret) |= ANYOF_UNICODE; |
| 3501 | Perl_sv_catpvf(aTHX_ listsv, |
| 3502 | "%04"UVxf"\n%04"UVxf"\n", (UV)prevvalue, (UV) '-'); |
| 3503 | } |
| 3504 | } |
| 3505 | |
| 3506 | range = 0; /* this was not a true range */ |
| 3507 | } |
| 3508 | |
| 3509 | if (!SIZE_ONLY) { |
| 3510 | if (namedclass > OOB_NAMEDCLASS) |
| 3511 | optimize_invert = FALSE; |
| 3512 | /* Possible truncation here but in some 64-bit environments |
| 3513 | * the compiler gets heartburn about switch on 64-bit values. |
| 3514 | * A similar issue a little earlier when switching on value. |
| 3515 | * --jhi */ |
| 3516 | switch ((I32)namedclass) { |
| 3517 | case ANYOF_ALNUM: |
| 3518 | if (LOC) |
| 3519 | ANYOF_CLASS_SET(ret, ANYOF_ALNUM); |
| 3520 | else { |
| 3521 | for (value = 0; value < 256; value++) |
| 3522 | if (isALNUM(value)) |
| 3523 | ANYOF_BITMAP_SET(ret, value); |
| 3524 | } |
| 3525 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsWord\n"); |
| 3526 | break; |
| 3527 | case ANYOF_NALNUM: |
| 3528 | if (LOC) |
| 3529 | ANYOF_CLASS_SET(ret, ANYOF_NALNUM); |
| 3530 | else { |
| 3531 | for (value = 0; value < 256; value++) |
| 3532 | if (!isALNUM(value)) |
| 3533 | ANYOF_BITMAP_SET(ret, value); |
| 3534 | } |
| 3535 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsWord\n"); |
| 3536 | break; |
| 3537 | case ANYOF_ALNUMC: |
| 3538 | if (LOC) |
| 3539 | ANYOF_CLASS_SET(ret, ANYOF_ALNUMC); |
| 3540 | else { |
| 3541 | for (value = 0; value < 256; value++) |
| 3542 | if (isALNUMC(value)) |
| 3543 | ANYOF_BITMAP_SET(ret, value); |
| 3544 | } |
| 3545 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsAlnum\n"); |
| 3546 | break; |
| 3547 | case ANYOF_NALNUMC: |
| 3548 | if (LOC) |
| 3549 | ANYOF_CLASS_SET(ret, ANYOF_NALNUMC); |
| 3550 | else { |
| 3551 | for (value = 0; value < 256; value++) |
| 3552 | if (!isALNUMC(value)) |
| 3553 | ANYOF_BITMAP_SET(ret, value); |
| 3554 | } |
| 3555 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsAlnum\n"); |
| 3556 | break; |
| 3557 | case ANYOF_ALPHA: |
| 3558 | if (LOC) |
| 3559 | ANYOF_CLASS_SET(ret, ANYOF_ALPHA); |
| 3560 | else { |
| 3561 | for (value = 0; value < 256; value++) |
| 3562 | if (isALPHA(value)) |
| 3563 | ANYOF_BITMAP_SET(ret, value); |
| 3564 | } |
| 3565 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsAlpha\n"); |
| 3566 | break; |
| 3567 | case ANYOF_NALPHA: |
| 3568 | if (LOC) |
| 3569 | ANYOF_CLASS_SET(ret, ANYOF_NALPHA); |
| 3570 | else { |
| 3571 | for (value = 0; value < 256; value++) |
| 3572 | if (!isALPHA(value)) |
| 3573 | ANYOF_BITMAP_SET(ret, value); |
| 3574 | } |
| 3575 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsAlpha\n"); |
| 3576 | break; |
| 3577 | case ANYOF_ASCII: |
| 3578 | if (LOC) |
| 3579 | ANYOF_CLASS_SET(ret, ANYOF_ASCII); |
| 3580 | else { |
| 3581 | #ifndef EBCDIC |
| 3582 | for (value = 0; value < 128; value++) |
| 3583 | ANYOF_BITMAP_SET(ret, value); |
| 3584 | #else /* EBCDIC */ |
| 3585 | for (value = 0; value < 256; value++) { |
| 3586 | if (isASCII(value)) |
| 3587 | ANYOF_BITMAP_SET(ret, value); |
| 3588 | } |
| 3589 | #endif /* EBCDIC */ |
| 3590 | } |
| 3591 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsASCII\n"); |
| 3592 | break; |
| 3593 | case ANYOF_NASCII: |
| 3594 | if (LOC) |
| 3595 | ANYOF_CLASS_SET(ret, ANYOF_NASCII); |
| 3596 | else { |
| 3597 | #ifndef EBCDIC |
| 3598 | for (value = 128; value < 256; value++) |
| 3599 | ANYOF_BITMAP_SET(ret, value); |
| 3600 | #else /* EBCDIC */ |
| 3601 | for (value = 0; value < 256; value++) { |
| 3602 | if (!isASCII(value)) |
| 3603 | ANYOF_BITMAP_SET(ret, value); |
| 3604 | } |
| 3605 | #endif /* EBCDIC */ |
| 3606 | } |
| 3607 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsASCII\n"); |
| 3608 | break; |
| 3609 | case ANYOF_BLANK: |
| 3610 | if (LOC) |
| 3611 | ANYOF_CLASS_SET(ret, ANYOF_BLANK); |
| 3612 | else { |
| 3613 | for (value = 0; value < 256; value++) |
| 3614 | if (isBLANK(value)) |
| 3615 | ANYOF_BITMAP_SET(ret, value); |
| 3616 | } |
| 3617 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsBlank\n"); |
| 3618 | break; |
| 3619 | case ANYOF_NBLANK: |
| 3620 | if (LOC) |
| 3621 | ANYOF_CLASS_SET(ret, ANYOF_NBLANK); |
| 3622 | else { |
| 3623 | for (value = 0; value < 256; value++) |
| 3624 | if (!isBLANK(value)) |
| 3625 | ANYOF_BITMAP_SET(ret, value); |
| 3626 | } |
| 3627 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsBlank\n"); |
| 3628 | break; |
| 3629 | case ANYOF_CNTRL: |
| 3630 | if (LOC) |
| 3631 | ANYOF_CLASS_SET(ret, ANYOF_CNTRL); |
| 3632 | else { |
| 3633 | for (value = 0; value < 256; value++) |
| 3634 | if (isCNTRL(value)) |
| 3635 | ANYOF_BITMAP_SET(ret, value); |
| 3636 | } |
| 3637 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsCntrl\n"); |
| 3638 | break; |
| 3639 | case ANYOF_NCNTRL: |
| 3640 | if (LOC) |
| 3641 | ANYOF_CLASS_SET(ret, ANYOF_NCNTRL); |
| 3642 | else { |
| 3643 | for (value = 0; value < 256; value++) |
| 3644 | if (!isCNTRL(value)) |
| 3645 | ANYOF_BITMAP_SET(ret, value); |
| 3646 | } |
| 3647 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsCntrl\n"); |
| 3648 | break; |
| 3649 | case ANYOF_DIGIT: |
| 3650 | if (LOC) |
| 3651 | ANYOF_CLASS_SET(ret, ANYOF_DIGIT); |
| 3652 | else { |
| 3653 | /* consecutive digits assumed */ |
| 3654 | for (value = '0'; value <= '9'; value++) |
| 3655 | ANYOF_BITMAP_SET(ret, value); |
| 3656 | } |
| 3657 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsDigit\n"); |
| 3658 | break; |
| 3659 | case ANYOF_NDIGIT: |
| 3660 | if (LOC) |
| 3661 | ANYOF_CLASS_SET(ret, ANYOF_NDIGIT); |
| 3662 | else { |
| 3663 | /* consecutive digits assumed */ |
| 3664 | for (value = 0; value < '0'; value++) |
| 3665 | ANYOF_BITMAP_SET(ret, value); |
| 3666 | for (value = '9' + 1; value < 256; value++) |
| 3667 | ANYOF_BITMAP_SET(ret, value); |
| 3668 | } |
| 3669 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsDigit\n"); |
| 3670 | break; |
| 3671 | case ANYOF_GRAPH: |
| 3672 | if (LOC) |
| 3673 | ANYOF_CLASS_SET(ret, ANYOF_GRAPH); |
| 3674 | else { |
| 3675 | for (value = 0; value < 256; value++) |
| 3676 | if (isGRAPH(value)) |
| 3677 | ANYOF_BITMAP_SET(ret, value); |
| 3678 | } |
| 3679 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsGraph\n"); |
| 3680 | break; |
| 3681 | case ANYOF_NGRAPH: |
| 3682 | if (LOC) |
| 3683 | ANYOF_CLASS_SET(ret, ANYOF_NGRAPH); |
| 3684 | else { |
| 3685 | for (value = 0; value < 256; value++) |
| 3686 | if (!isGRAPH(value)) |
| 3687 | ANYOF_BITMAP_SET(ret, value); |
| 3688 | } |
| 3689 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsGraph\n"); |
| 3690 | break; |
| 3691 | case ANYOF_LOWER: |
| 3692 | if (LOC) |
| 3693 | ANYOF_CLASS_SET(ret, ANYOF_LOWER); |
| 3694 | else { |
| 3695 | for (value = 0; value < 256; value++) |
| 3696 | if (isLOWER(value)) |
| 3697 | ANYOF_BITMAP_SET(ret, value); |
| 3698 | } |
| 3699 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsLower\n"); |
| 3700 | break; |
| 3701 | case ANYOF_NLOWER: |
| 3702 | if (LOC) |
| 3703 | ANYOF_CLASS_SET(ret, ANYOF_NLOWER); |
| 3704 | else { |
| 3705 | for (value = 0; value < 256; value++) |
| 3706 | if (!isLOWER(value)) |
| 3707 | ANYOF_BITMAP_SET(ret, value); |
| 3708 | } |
| 3709 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsLower\n"); |
| 3710 | break; |
| 3711 | case ANYOF_PRINT: |
| 3712 | if (LOC) |
| 3713 | ANYOF_CLASS_SET(ret, ANYOF_PRINT); |
| 3714 | else { |
| 3715 | for (value = 0; value < 256; value++) |
| 3716 | if (isPRINT(value)) |
| 3717 | ANYOF_BITMAP_SET(ret, value); |
| 3718 | } |
| 3719 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsPrint\n"); |
| 3720 | break; |
| 3721 | case ANYOF_NPRINT: |
| 3722 | if (LOC) |
| 3723 | ANYOF_CLASS_SET(ret, ANYOF_NPRINT); |
| 3724 | else { |
| 3725 | for (value = 0; value < 256; value++) |
| 3726 | if (!isPRINT(value)) |
| 3727 | ANYOF_BITMAP_SET(ret, value); |
| 3728 | } |
| 3729 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsPrint\n"); |
| 3730 | break; |
| 3731 | case ANYOF_PSXSPC: |
| 3732 | if (LOC) |
| 3733 | ANYOF_CLASS_SET(ret, ANYOF_PSXSPC); |
| 3734 | else { |
| 3735 | for (value = 0; value < 256; value++) |
| 3736 | if (isPSXSPC(value)) |
| 3737 | ANYOF_BITMAP_SET(ret, value); |
| 3738 | } |
| 3739 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsSpace\n"); |
| 3740 | break; |
| 3741 | case ANYOF_NPSXSPC: |
| 3742 | if (LOC) |
| 3743 | ANYOF_CLASS_SET(ret, ANYOF_NPSXSPC); |
| 3744 | else { |
| 3745 | for (value = 0; value < 256; value++) |
| 3746 | if (!isPSXSPC(value)) |
| 3747 | ANYOF_BITMAP_SET(ret, value); |
| 3748 | } |
| 3749 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsSpace\n"); |
| 3750 | break; |
| 3751 | case ANYOF_PUNCT: |
| 3752 | if (LOC) |
| 3753 | ANYOF_CLASS_SET(ret, ANYOF_PUNCT); |
| 3754 | else { |
| 3755 | for (value = 0; value < 256; value++) |
| 3756 | if (isPUNCT(value)) |
| 3757 | ANYOF_BITMAP_SET(ret, value); |
| 3758 | } |
| 3759 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsPunct\n"); |
| 3760 | break; |
| 3761 | case ANYOF_NPUNCT: |
| 3762 | if (LOC) |
| 3763 | ANYOF_CLASS_SET(ret, ANYOF_NPUNCT); |
| 3764 | else { |
| 3765 | for (value = 0; value < 256; value++) |
| 3766 | if (!isPUNCT(value)) |
| 3767 | ANYOF_BITMAP_SET(ret, value); |
| 3768 | } |
| 3769 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsPunct\n"); |
| 3770 | break; |
| 3771 | case ANYOF_SPACE: |
| 3772 | if (LOC) |
| 3773 | ANYOF_CLASS_SET(ret, ANYOF_SPACE); |
| 3774 | else { |
| 3775 | for (value = 0; value < 256; value++) |
| 3776 | if (isSPACE(value)) |
| 3777 | ANYOF_BITMAP_SET(ret, value); |
| 3778 | } |
| 3779 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsSpacePerl\n"); |
| 3780 | break; |
| 3781 | case ANYOF_NSPACE: |
| 3782 | if (LOC) |
| 3783 | ANYOF_CLASS_SET(ret, ANYOF_NSPACE); |
| 3784 | else { |
| 3785 | for (value = 0; value < 256; value++) |
| 3786 | if (!isSPACE(value)) |
| 3787 | ANYOF_BITMAP_SET(ret, value); |
| 3788 | } |
| 3789 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsSpacePerl\n"); |
| 3790 | break; |
| 3791 | case ANYOF_UPPER: |
| 3792 | if (LOC) |
| 3793 | ANYOF_CLASS_SET(ret, ANYOF_UPPER); |
| 3794 | else { |
| 3795 | for (value = 0; value < 256; value++) |
| 3796 | if (isUPPER(value)) |
| 3797 | ANYOF_BITMAP_SET(ret, value); |
| 3798 | } |
| 3799 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsUpper\n"); |
| 3800 | break; |
| 3801 | case ANYOF_NUPPER: |
| 3802 | if (LOC) |
| 3803 | ANYOF_CLASS_SET(ret, ANYOF_NUPPER); |
| 3804 | else { |
| 3805 | for (value = 0; value < 256; value++) |
| 3806 | if (!isUPPER(value)) |
| 3807 | ANYOF_BITMAP_SET(ret, value); |
| 3808 | } |
| 3809 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsUpper\n"); |
| 3810 | break; |
| 3811 | case ANYOF_XDIGIT: |
| 3812 | if (LOC) |
| 3813 | ANYOF_CLASS_SET(ret, ANYOF_XDIGIT); |
| 3814 | else { |
| 3815 | for (value = 0; value < 256; value++) |
| 3816 | if (isXDIGIT(value)) |
| 3817 | ANYOF_BITMAP_SET(ret, value); |
| 3818 | } |
| 3819 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsXDigit\n"); |
| 3820 | break; |
| 3821 | case ANYOF_NXDIGIT: |
| 3822 | if (LOC) |
| 3823 | ANYOF_CLASS_SET(ret, ANYOF_NXDIGIT); |
| 3824 | else { |
| 3825 | for (value = 0; value < 256; value++) |
| 3826 | if (!isXDIGIT(value)) |
| 3827 | ANYOF_BITMAP_SET(ret, value); |
| 3828 | } |
| 3829 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsXDigit\n"); |
| 3830 | break; |
| 3831 | default: |
| 3832 | vFAIL("Invalid [::] class"); |
| 3833 | break; |
| 3834 | } |
| 3835 | if (LOC) |
| 3836 | ANYOF_FLAGS(ret) |= ANYOF_CLASS; |
| 3837 | continue; |
| 3838 | } |
| 3839 | } /* end of namedclass \blah */ |
| 3840 | |
| 3841 | if (range) { |
| 3842 | if (prevvalue > value) /* b-a */ { |
| 3843 | Simple_vFAIL4("Invalid [] range \"%*.*s\"", |
| 3844 | RExC_parse - rangebegin, |
| 3845 | RExC_parse - rangebegin, |
| 3846 | rangebegin); |
| 3847 | range = 0; /* not a valid range */ |
| 3848 | } |
| 3849 | } |
| 3850 | else { |
| 3851 | prevvalue = value; /* save the beginning of the range */ |
| 3852 | if (*RExC_parse == '-' && RExC_parse+1 < RExC_end && |
| 3853 | RExC_parse[1] != ']') { |
| 3854 | RExC_parse++; |
| 3855 | |
| 3856 | /* a bad range like \w-, [:word:]- ? */ |
| 3857 | if (namedclass > OOB_NAMEDCLASS) { |
| 3858 | if (ckWARN(WARN_REGEXP)) |
| 3859 | vWARN4(RExC_parse, |
| 3860 | "False [] range \"%*.*s\"", |
| 3861 | RExC_parse - rangebegin, |
| 3862 | RExC_parse - rangebegin, |
| 3863 | rangebegin); |
| 3864 | if (!SIZE_ONLY) |
| 3865 | ANYOF_BITMAP_SET(ret, '-'); |
| 3866 | } else |
| 3867 | range = 1; /* yeah, it's a range! */ |
| 3868 | continue; /* but do it the next time */ |
| 3869 | } |
| 3870 | } |
| 3871 | |
| 3872 | /* now is the next time */ |
| 3873 | if (!SIZE_ONLY) { |
| 3874 | IV i; |
| 3875 | |
| 3876 | if (prevvalue < 256) { |
| 3877 | IV ceilvalue = value < 256 ? value : 255; |
| 3878 | |
| 3879 | #ifdef EBCDIC |
| 3880 | if ((isLOWER(prevvalue) && isLOWER(ceilvalue)) || |
| 3881 | (isUPPER(prevvalue) && isUPPER(ceilvalue))) |
| 3882 | { |
| 3883 | if (isLOWER(prevvalue)) { |
| 3884 | for (i = prevvalue; i <= ceilvalue; i++) |
| 3885 | if (isLOWER(i)) |
| 3886 | ANYOF_BITMAP_SET(ret, i); |
| 3887 | } else { |
| 3888 | for (i = prevvalue; i <= ceilvalue; i++) |
| 3889 | if (isUPPER(i)) |
| 3890 | ANYOF_BITMAP_SET(ret, i); |
| 3891 | } |
| 3892 | } |
| 3893 | else |
| 3894 | #endif |
| 3895 | for (i = prevvalue; i <= ceilvalue; i++) |
| 3896 | ANYOF_BITMAP_SET(ret, i); |
| 3897 | } |
| 3898 | if (value > 255) { |
| 3899 | ANYOF_FLAGS(ret) |= ANYOF_UNICODE; |
| 3900 | if (prevvalue < value) |
| 3901 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\t%04"UVxf"\n", |
| 3902 | (UV)prevvalue, (UV)value); |
| 3903 | else if (prevvalue == value) |
| 3904 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", |
| 3905 | (UV)value); |
| 3906 | } |
| 3907 | } |
| 3908 | |
| 3909 | range = 0; /* this range (if it was one) is done now */ |
| 3910 | } |
| 3911 | |
| 3912 | if (need_class) { |
| 3913 | ANYOF_FLAGS(ret) |= ANYOF_LARGE; |
| 3914 | if (SIZE_ONLY) |
| 3915 | RExC_size += ANYOF_CLASS_ADD_SKIP; |
| 3916 | else |
| 3917 | RExC_emit += ANYOF_CLASS_ADD_SKIP; |
| 3918 | } |
| 3919 | |
| 3920 | /* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */ |
| 3921 | if (!SIZE_ONLY && |
| 3922 | /* If the only flag is folding (plus possibly inversion). */ |
| 3923 | ((ANYOF_FLAGS(ret) & (ANYOF_FLAGS_ALL ^ ANYOF_INVERT)) == ANYOF_FOLD) |
| 3924 | ) { |
| 3925 | for (value = 0; value < 256; ++value) { |
| 3926 | if (ANYOF_BITMAP_TEST(ret, value)) { |
| 3927 | IV fold = PL_fold[value]; |
| 3928 | |
| 3929 | if (fold != value) |
| 3930 | ANYOF_BITMAP_SET(ret, fold); |
| 3931 | } |
| 3932 | } |
| 3933 | ANYOF_FLAGS(ret) &= ~ANYOF_FOLD; |
| 3934 | } |
| 3935 | |
| 3936 | /* optimize inverted simple patterns (e.g. [^a-z]) */ |
| 3937 | if (!SIZE_ONLY && optimize_invert && |
| 3938 | /* If the only flag is inversion. */ |
| 3939 | (ANYOF_FLAGS(ret) & ANYOF_FLAGS_ALL) == ANYOF_INVERT) { |
| 3940 | for (value = 0; value < ANYOF_BITMAP_SIZE; ++value) |
| 3941 | ANYOF_BITMAP(ret)[value] ^= ANYOF_FLAGS_ALL; |
| 3942 | ANYOF_FLAGS(ret) = ANYOF_UNICODE_ALL; |
| 3943 | } |
| 3944 | |
| 3945 | if (!SIZE_ONLY) { |
| 3946 | AV *av = newAV(); |
| 3947 | SV *rv; |
| 3948 | |
| 3949 | av_store(av, 0, listsv); |
| 3950 | av_store(av, 1, NULL); |
| 3951 | rv = newRV_noinc((SV*)av); |
| 3952 | n = add_data(pRExC_state, 1, "s"); |
| 3953 | RExC_rx->data->data[n] = (void*)rv; |
| 3954 | ARG_SET(ret, n); |
| 3955 | } |
| 3956 | |
| 3957 | return ret; |
| 3958 | } |
| 3959 | |
| 3960 | STATIC char* |
| 3961 | S_nextchar(pTHX_ RExC_state_t *pRExC_state) |
| 3962 | { |
| 3963 | char* retval = RExC_parse++; |
| 3964 | |
| 3965 | for (;;) { |
| 3966 | if (*RExC_parse == '(' && RExC_parse[1] == '?' && |
| 3967 | RExC_parse[2] == '#') { |
| 3968 | while (*RExC_parse && *RExC_parse != ')') |
| 3969 | RExC_parse++; |
| 3970 | RExC_parse++; |
| 3971 | continue; |
| 3972 | } |
| 3973 | if (RExC_flags16 & PMf_EXTENDED) { |
| 3974 | if (isSPACE(*RExC_parse)) { |
| 3975 | RExC_parse++; |
| 3976 | continue; |
| 3977 | } |
| 3978 | else if (*RExC_parse == '#') { |
| 3979 | while (*RExC_parse && *RExC_parse != '\n') |
| 3980 | RExC_parse++; |
| 3981 | RExC_parse++; |
| 3982 | continue; |
| 3983 | } |
| 3984 | } |
| 3985 | return retval; |
| 3986 | } |
| 3987 | } |
| 3988 | |
| 3989 | /* |
| 3990 | - reg_node - emit a node |
| 3991 | */ |
| 3992 | STATIC regnode * /* Location. */ |
| 3993 | S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op) |
| 3994 | { |
| 3995 | register regnode *ret; |
| 3996 | register regnode *ptr; |
| 3997 | |
| 3998 | ret = RExC_emit; |
| 3999 | if (SIZE_ONLY) { |
| 4000 | SIZE_ALIGN(RExC_size); |
| 4001 | RExC_size += 1; |
| 4002 | return(ret); |
| 4003 | } |
| 4004 | |
| 4005 | NODE_ALIGN_FILL(ret); |
| 4006 | ptr = ret; |
| 4007 | FILL_ADVANCE_NODE(ptr, op); |
| 4008 | if (RExC_offsets) { /* MJD */ |
| 4009 | MJD_OFFSET_DEBUG((stderr, "%s:%u: (op %s) %s %u <- %u (len %u) (max %u).\n", |
| 4010 | "reg_node", __LINE__, |
| 4011 | reg_name[op], |
| 4012 | RExC_emit - RExC_emit_start > RExC_offsets[0] |
| 4013 | ? "Overwriting end of array!\n" : "OK", |
| 4014 | RExC_emit - RExC_emit_start, |
| 4015 | RExC_parse - RExC_start, |
| 4016 | RExC_offsets[0])); |
| 4017 | Set_Node_Offset(RExC_emit, RExC_parse + (op == END)); |
| 4018 | } |
| 4019 | |
| 4020 | RExC_emit = ptr; |
| 4021 | |
| 4022 | return(ret); |
| 4023 | } |
| 4024 | |
| 4025 | /* |
| 4026 | - reganode - emit a node with an argument |
| 4027 | */ |
| 4028 | STATIC regnode * /* Location. */ |
| 4029 | S_reganode(pTHX_ RExC_state_t *pRExC_state, U8 op, U32 arg) |
| 4030 | { |
| 4031 | register regnode *ret; |
| 4032 | register regnode *ptr; |
| 4033 | |
| 4034 | ret = RExC_emit; |
| 4035 | if (SIZE_ONLY) { |
| 4036 | SIZE_ALIGN(RExC_size); |
| 4037 | RExC_size += 2; |
| 4038 | return(ret); |
| 4039 | } |
| 4040 | |
| 4041 | NODE_ALIGN_FILL(ret); |
| 4042 | ptr = ret; |
| 4043 | FILL_ADVANCE_NODE_ARG(ptr, op, arg); |
| 4044 | if (RExC_offsets) { /* MJD */ |
| 4045 | MJD_OFFSET_DEBUG((stderr, "%s: %s %u <- %u (max %u).\n", |
| 4046 | "reganode", |
| 4047 | RExC_emit - RExC_emit_start > RExC_offsets[0] ? |
| 4048 | "Overwriting end of array!\n" : "OK", |
| 4049 | RExC_emit - RExC_emit_start, |
| 4050 | RExC_parse - RExC_start, |
| 4051 | RExC_offsets[0])); |
| 4052 | Set_Cur_Node_Offset; |
| 4053 | } |
| 4054 | |
| 4055 | RExC_emit = ptr; |
| 4056 | |
| 4057 | return(ret); |
| 4058 | } |
| 4059 | |
| 4060 | /* |
| 4061 | - reguni - emit (if appropriate) a Unicode character |
| 4062 | */ |
| 4063 | STATIC void |
| 4064 | S_reguni(pTHX_ RExC_state_t *pRExC_state, UV uv, char* s, STRLEN* lenp) |
| 4065 | { |
| 4066 | *lenp = SIZE_ONLY ? UNISKIP(uv) : (uvchr_to_utf8((U8*)s, uv) - (U8*)s); |
| 4067 | } |
| 4068 | |
| 4069 | /* |
| 4070 | - reginsert - insert an operator in front of already-emitted operand |
| 4071 | * |
| 4072 | * Means relocating the operand. |
| 4073 | */ |
| 4074 | STATIC void |
| 4075 | S_reginsert(pTHX_ RExC_state_t *pRExC_state, U8 op, regnode *opnd) |
| 4076 | { |
| 4077 | register regnode *src; |
| 4078 | register regnode *dst; |
| 4079 | register regnode *place; |
| 4080 | register int offset = regarglen[(U8)op]; |
| 4081 | |
| 4082 | /* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */ |
| 4083 | |
| 4084 | if (SIZE_ONLY) { |
| 4085 | RExC_size += NODE_STEP_REGNODE + offset; |
| 4086 | return; |
| 4087 | } |
| 4088 | |
| 4089 | src = RExC_emit; |
| 4090 | RExC_emit += NODE_STEP_REGNODE + offset; |
| 4091 | dst = RExC_emit; |
| 4092 | while (src > opnd) { |
| 4093 | StructCopy(--src, --dst, regnode); |
| 4094 | if (RExC_offsets) { /* MJD 20010112 */ |
| 4095 | MJD_OFFSET_DEBUG((stderr, "%s: %s copy %u -> %u (max %u).\n", |
| 4096 | "reg_insert", |
| 4097 | dst - RExC_emit_start > RExC_offsets[0] |
| 4098 | ? "Overwriting end of array!\n" : "OK", |
| 4099 | src - RExC_emit_start, |
| 4100 | dst - RExC_emit_start, |
| 4101 | RExC_offsets[0])); |
| 4102 | Set_Node_Offset_To_R(dst-RExC_emit_start, Node_Offset(src)); |
| 4103 | Set_Node_Length_To_R(dst-RExC_emit_start, Node_Length(src)); |
| 4104 | } |
| 4105 | } |
| 4106 | |
| 4107 | |
| 4108 | place = opnd; /* Op node, where operand used to be. */ |
| 4109 | if (RExC_offsets) { /* MJD */ |
| 4110 | MJD_OFFSET_DEBUG((stderr, "%s: %s %u <- %u (max %u).\n", |
| 4111 | "reginsert", |
| 4112 | place - RExC_emit_start > RExC_offsets[0] |
| 4113 | ? "Overwriting end of array!\n" : "OK", |
| 4114 | place - RExC_emit_start, |
| 4115 | RExC_parse - RExC_start, |
| 4116 | RExC_offsets[0])); |
| 4117 | Set_Node_Offset(place, RExC_parse); |
| 4118 | } |
| 4119 | src = NEXTOPER(place); |
| 4120 | FILL_ADVANCE_NODE(place, op); |
| 4121 | Zero(src, offset, regnode); |
| 4122 | } |
| 4123 | |
| 4124 | /* |
| 4125 | - regtail - set the next-pointer at the end of a node chain of p to val. |
| 4126 | */ |
| 4127 | STATIC void |
| 4128 | S_regtail(pTHX_ RExC_state_t *pRExC_state, regnode *p, regnode *val) |
| 4129 | { |
| 4130 | register regnode *scan; |
| 4131 | register regnode *temp; |
| 4132 | |
| 4133 | if (SIZE_ONLY) |
| 4134 | return; |
| 4135 | |
| 4136 | /* Find last node. */ |
| 4137 | scan = p; |
| 4138 | for (;;) { |
| 4139 | temp = regnext(scan); |
| 4140 | if (temp == NULL) |
| 4141 | break; |
| 4142 | scan = temp; |
| 4143 | } |
| 4144 | |
| 4145 | if (reg_off_by_arg[OP(scan)]) { |
| 4146 | ARG_SET(scan, val - scan); |
| 4147 | } |
| 4148 | else { |
| 4149 | NEXT_OFF(scan) = val - scan; |
| 4150 | } |
| 4151 | } |
| 4152 | |
| 4153 | /* |
| 4154 | - regoptail - regtail on operand of first argument; nop if operandless |
| 4155 | */ |
| 4156 | STATIC void |
| 4157 | S_regoptail(pTHX_ RExC_state_t *pRExC_state, regnode *p, regnode *val) |
| 4158 | { |
| 4159 | /* "Operandless" and "op != BRANCH" are synonymous in practice. */ |
| 4160 | if (p == NULL || SIZE_ONLY) |
| 4161 | return; |
| 4162 | if (PL_regkind[(U8)OP(p)] == BRANCH) { |
| 4163 | regtail(pRExC_state, NEXTOPER(p), val); |
| 4164 | } |
| 4165 | else if ( PL_regkind[(U8)OP(p)] == BRANCHJ) { |
| 4166 | regtail(pRExC_state, NEXTOPER(NEXTOPER(p)), val); |
| 4167 | } |
| 4168 | else |
| 4169 | return; |
| 4170 | } |
| 4171 | |
| 4172 | /* |
| 4173 | - regcurly - a little FSA that accepts {\d+,?\d*} |
| 4174 | */ |
| 4175 | STATIC I32 |
| 4176 | S_regcurly(pTHX_ register char *s) |
| 4177 | { |
| 4178 | if (*s++ != '{') |
| 4179 | return FALSE; |
| 4180 | if (!isDIGIT(*s)) |
| 4181 | return FALSE; |
| 4182 | while (isDIGIT(*s)) |
| 4183 | s++; |
| 4184 | if (*s == ',') |
| 4185 | s++; |
| 4186 | while (isDIGIT(*s)) |
| 4187 | s++; |
| 4188 | if (*s != '}') |
| 4189 | return FALSE; |
| 4190 | return TRUE; |
| 4191 | } |
| 4192 | |
| 4193 | |
| 4194 | #ifdef DEBUGGING |
| 4195 | |
| 4196 | STATIC regnode * |
| 4197 | S_dumpuntil(pTHX_ regnode *start, regnode *node, regnode *last, SV* sv, I32 l) |
| 4198 | { |
| 4199 | register U8 op = EXACT; /* Arbitrary non-END op. */ |
| 4200 | register regnode *next; |
| 4201 | |
| 4202 | while (op != END && (!last || node < last)) { |
| 4203 | /* While that wasn't END last time... */ |
| 4204 | |
| 4205 | NODE_ALIGN(node); |
| 4206 | op = OP(node); |
| 4207 | if (op == CLOSE) |
| 4208 | l--; |
| 4209 | next = regnext(node); |
| 4210 | /* Where, what. */ |
| 4211 | if (OP(node) == OPTIMIZED) |
| 4212 | goto after_print; |
| 4213 | regprop(sv, node); |
| 4214 | PerlIO_printf(Perl_debug_log, "%4"IVdf":%*s%s", (IV)(node - start), |
| 4215 | (int)(2*l + 1), "", SvPVX(sv)); |
| 4216 | if (next == NULL) /* Next ptr. */ |
| 4217 | PerlIO_printf(Perl_debug_log, "(0)"); |
| 4218 | else |
| 4219 | PerlIO_printf(Perl_debug_log, "(%"IVdf")", (IV)(next - start)); |
| 4220 | (void)PerlIO_putc(Perl_debug_log, '\n'); |
| 4221 | after_print: |
| 4222 | if (PL_regkind[(U8)op] == BRANCHJ) { |
| 4223 | register regnode *nnode = (OP(next) == LONGJMP |
| 4224 | ? regnext(next) |
| 4225 | : next); |
| 4226 | if (last && nnode > last) |
| 4227 | nnode = last; |
| 4228 | node = dumpuntil(start, NEXTOPER(NEXTOPER(node)), nnode, sv, l + 1); |
| 4229 | } |
| 4230 | else if (PL_regkind[(U8)op] == BRANCH) { |
| 4231 | node = dumpuntil(start, NEXTOPER(node), next, sv, l + 1); |
| 4232 | } |
| 4233 | else if ( op == CURLY) { /* `next' might be very big: optimizer */ |
| 4234 | node = dumpuntil(start, NEXTOPER(node) + EXTRA_STEP_2ARGS, |
| 4235 | NEXTOPER(node) + EXTRA_STEP_2ARGS + 1, sv, l + 1); |
| 4236 | } |
| 4237 | else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) { |
| 4238 | node = dumpuntil(start, NEXTOPER(node) + EXTRA_STEP_2ARGS, |
| 4239 | next, sv, l + 1); |
| 4240 | } |
| 4241 | else if ( op == PLUS || op == STAR) { |
| 4242 | node = dumpuntil(start, NEXTOPER(node), NEXTOPER(node) + 1, sv, l + 1); |
| 4243 | } |
| 4244 | else if (op == ANYOF) { |
| 4245 | /* arglen 1 + class block */ |
| 4246 | node += 1 + ((ANYOF_FLAGS(node) & ANYOF_LARGE) |
| 4247 | ? ANYOF_CLASS_SKIP : ANYOF_SKIP); |
| 4248 | node = NEXTOPER(node); |
| 4249 | } |
| 4250 | else if (PL_regkind[(U8)op] == EXACT) { |
| 4251 | /* Literal string, where present. */ |
| 4252 | node += NODE_SZ_STR(node) - 1; |
| 4253 | node = NEXTOPER(node); |
| 4254 | } |
| 4255 | else { |
| 4256 | node = NEXTOPER(node); |
| 4257 | node += regarglen[(U8)op]; |
| 4258 | } |
| 4259 | if (op == CURLYX || op == OPEN) |
| 4260 | l++; |
| 4261 | else if (op == WHILEM) |
| 4262 | l--; |
| 4263 | } |
| 4264 | return node; |
| 4265 | } |
| 4266 | |
| 4267 | #endif /* DEBUGGING */ |
| 4268 | |
| 4269 | /* |
| 4270 | - regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form |
| 4271 | */ |
| 4272 | void |
| 4273 | Perl_regdump(pTHX_ regexp *r) |
| 4274 | { |
| 4275 | #ifdef DEBUGGING |
| 4276 | SV *sv = sv_newmortal(); |
| 4277 | |
| 4278 | (void)dumpuntil(r->program, r->program + 1, NULL, sv, 0); |
| 4279 | |
| 4280 | /* Header fields of interest. */ |
| 4281 | if (r->anchored_substr) |
| 4282 | PerlIO_printf(Perl_debug_log, |
| 4283 | "anchored `%s%.*s%s'%s at %"IVdf" ", |
| 4284 | PL_colors[0], |
| 4285 | (int)(SvCUR(r->anchored_substr) - (SvTAIL(r->anchored_substr)!=0)), |
| 4286 | SvPVX(r->anchored_substr), |
| 4287 | PL_colors[1], |
| 4288 | SvTAIL(r->anchored_substr) ? "$" : "", |
| 4289 | (IV)r->anchored_offset); |
| 4290 | if (r->float_substr) |
| 4291 | PerlIO_printf(Perl_debug_log, |
| 4292 | "floating `%s%.*s%s'%s at %"IVdf"..%"UVuf" ", |
| 4293 | PL_colors[0], |
| 4294 | (int)(SvCUR(r->float_substr) - (SvTAIL(r->float_substr)!=0)), |
| 4295 | SvPVX(r->float_substr), |
| 4296 | PL_colors[1], |
| 4297 | SvTAIL(r->float_substr) ? "$" : "", |
| 4298 | (IV)r->float_min_offset, (UV)r->float_max_offset); |
| 4299 | if (r->check_substr) |
| 4300 | PerlIO_printf(Perl_debug_log, |
| 4301 | r->check_substr == r->float_substr |
| 4302 | ? "(checking floating" : "(checking anchored"); |
| 4303 | if (r->reganch & ROPT_NOSCAN) |
| 4304 | PerlIO_printf(Perl_debug_log, " noscan"); |
| 4305 | if (r->reganch & ROPT_CHECK_ALL) |
| 4306 | PerlIO_printf(Perl_debug_log, " isall"); |
| 4307 | if (r->check_substr) |
| 4308 | PerlIO_printf(Perl_debug_log, ") "); |
| 4309 | |
| 4310 | if (r->regstclass) { |
| 4311 | regprop(sv, r->regstclass); |
| 4312 | PerlIO_printf(Perl_debug_log, "stclass `%s' ", SvPVX(sv)); |
| 4313 | } |
| 4314 | if (r->reganch & ROPT_ANCH) { |
| 4315 | PerlIO_printf(Perl_debug_log, "anchored"); |
| 4316 | if (r->reganch & ROPT_ANCH_BOL) |
| 4317 | PerlIO_printf(Perl_debug_log, "(BOL)"); |
| 4318 | if (r->reganch & ROPT_ANCH_MBOL) |
| 4319 | PerlIO_printf(Perl_debug_log, "(MBOL)"); |
| 4320 | if (r->reganch & ROPT_ANCH_SBOL) |
| 4321 | PerlIO_printf(Perl_debug_log, "(SBOL)"); |
| 4322 | if (r->reganch & ROPT_ANCH_GPOS) |
| 4323 | PerlIO_printf(Perl_debug_log, "(GPOS)"); |
| 4324 | PerlIO_putc(Perl_debug_log, ' '); |
| 4325 | } |
| 4326 | if (r->reganch & ROPT_GPOS_SEEN) |
| 4327 | PerlIO_printf(Perl_debug_log, "GPOS "); |
| 4328 | if (r->reganch & ROPT_SKIP) |
| 4329 | PerlIO_printf(Perl_debug_log, "plus "); |
| 4330 | if (r->reganch & ROPT_IMPLICIT) |
| 4331 | PerlIO_printf(Perl_debug_log, "implicit "); |
| 4332 | PerlIO_printf(Perl_debug_log, "minlen %ld ", (long) r->minlen); |
| 4333 | if (r->reganch & ROPT_EVAL_SEEN) |
| 4334 | PerlIO_printf(Perl_debug_log, "with eval "); |
| 4335 | PerlIO_printf(Perl_debug_log, "\n"); |
| 4336 | if (r->offsets) { |
| 4337 | U32 i; |
| 4338 | U32 len = r->offsets[0]; |
| 4339 | PerlIO_printf(Perl_debug_log, "Offsets: [%"UVuf"]\n\t", (UV)r->offsets[0]); |
| 4340 | for (i = 1; i <= len; i++) |
| 4341 | PerlIO_printf(Perl_debug_log, "%"UVuf"[%"UVuf"] ", |
| 4342 | (UV)r->offsets[i*2-1], |
| 4343 | (UV)r->offsets[i*2]); |
| 4344 | PerlIO_printf(Perl_debug_log, "\n"); |
| 4345 | } |
| 4346 | #endif /* DEBUGGING */ |
| 4347 | } |
| 4348 | |
| 4349 | #ifdef DEBUGGING |
| 4350 | |
| 4351 | STATIC void |
| 4352 | S_put_byte(pTHX_ SV *sv, int c) |
| 4353 | { |
| 4354 | if (isCNTRL(c) || c == 255 || !isPRINT(c)) |
| 4355 | Perl_sv_catpvf(aTHX_ sv, "\\%o", c); |
| 4356 | else if (c == '-' || c == ']' || c == '\\' || c == '^') |
| 4357 | Perl_sv_catpvf(aTHX_ sv, "\\%c", c); |
| 4358 | else |
| 4359 | Perl_sv_catpvf(aTHX_ sv, "%c", c); |
| 4360 | } |
| 4361 | |
| 4362 | #endif /* DEBUGGING */ |
| 4363 | |
| 4364 | /* |
| 4365 | - regprop - printable representation of opcode |
| 4366 | */ |
| 4367 | void |
| 4368 | Perl_regprop(pTHX_ SV *sv, regnode *o) |
| 4369 | { |
| 4370 | #ifdef DEBUGGING |
| 4371 | register int k; |
| 4372 | |
| 4373 | sv_setpvn(sv, "", 0); |
| 4374 | if (OP(o) >= reg_num) /* regnode.type is unsigned */ |
| 4375 | /* It would be nice to FAIL() here, but this may be called from |
| 4376 | regexec.c, and it would be hard to supply pRExC_state. */ |
| 4377 | Perl_croak(aTHX_ "Corrupted regexp opcode"); |
| 4378 | sv_catpv(sv, (char*)reg_name[OP(o)]); /* Take off const! */ |
| 4379 | |
| 4380 | k = PL_regkind[(U8)OP(o)]; |
| 4381 | |
| 4382 | if (k == EXACT) |
| 4383 | Perl_sv_catpvf(aTHX_ sv, " <%s%.*s%s>", PL_colors[0], |
| 4384 | STR_LEN(o), STRING(o), PL_colors[1]); |
| 4385 | else if (k == CURLY) { |
| 4386 | if (OP(o) == CURLYM || OP(o) == CURLYN || OP(o) == CURLYX) |
| 4387 | Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */ |
| 4388 | Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o)); |
| 4389 | } |
| 4390 | else if (k == WHILEM && o->flags) /* Ordinal/of */ |
| 4391 | Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4); |
| 4392 | else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP ) |
| 4393 | Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */ |
| 4394 | else if (k == LOGICAL) |
| 4395 | Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */ |
| 4396 | else if (k == ANYOF) { |
| 4397 | int i, rangestart = -1; |
| 4398 | U8 flags = ANYOF_FLAGS(o); |
| 4399 | const char * const anyofs[] = { /* Should be syncronized with |
| 4400 | * ANYOF_ #xdefines in regcomp.h */ |
| 4401 | "\\w", |
| 4402 | "\\W", |
| 4403 | "\\s", |
| 4404 | "\\S", |
| 4405 | "\\d", |
| 4406 | "\\D", |
| 4407 | "[:alnum:]", |
| 4408 | "[:^alnum:]", |
| 4409 | "[:alpha:]", |
| 4410 | "[:^alpha:]", |
| 4411 | "[:ascii:]", |
| 4412 | "[:^ascii:]", |
| 4413 | "[:ctrl:]", |
| 4414 | "[:^ctrl:]", |
| 4415 | "[:graph:]", |
| 4416 | "[:^graph:]", |
| 4417 | "[:lower:]", |
| 4418 | "[:^lower:]", |
| 4419 | "[:print:]", |
| 4420 | "[:^print:]", |
| 4421 | "[:punct:]", |
| 4422 | "[:^punct:]", |
| 4423 | "[:upper:]", |
| 4424 | "[:^upper:]", |
| 4425 | "[:xdigit:]", |
| 4426 | "[:^xdigit:]", |
| 4427 | "[:space:]", |
| 4428 | "[:^space:]", |
| 4429 | "[:blank:]", |
| 4430 | "[:^blank:]" |
| 4431 | }; |
| 4432 | |
| 4433 | if (flags & ANYOF_LOCALE) |
| 4434 | sv_catpv(sv, "{loc}"); |
| 4435 | if (flags & ANYOF_FOLD) |
| 4436 | sv_catpv(sv, "{i}"); |
| 4437 | Perl_sv_catpvf(aTHX_ sv, "[%s", PL_colors[0]); |
| 4438 | if (flags & ANYOF_INVERT) |
| 4439 | sv_catpv(sv, "^"); |
| 4440 | for (i = 0; i <= 256; i++) { |
| 4441 | if (i < 256 && ANYOF_BITMAP_TEST(o,i)) { |
| 4442 | if (rangestart == -1) |
| 4443 | rangestart = i; |
| 4444 | } else if (rangestart != -1) { |
| 4445 | if (i <= rangestart + 3) |
| 4446 | for (; rangestart < i; rangestart++) |
| 4447 | put_byte(sv, rangestart); |
| 4448 | else { |
| 4449 | put_byte(sv, rangestart); |
| 4450 | sv_catpv(sv, "-"); |
| 4451 | put_byte(sv, i - 1); |
| 4452 | } |
| 4453 | rangestart = -1; |
| 4454 | } |
| 4455 | } |
| 4456 | |
| 4457 | if (o->flags & ANYOF_CLASS) |
| 4458 | for (i = 0; i < sizeof(anyofs)/sizeof(char*); i++) |
| 4459 | if (ANYOF_CLASS_TEST(o,i)) |
| 4460 | sv_catpv(sv, anyofs[i]); |
| 4461 | |
| 4462 | if (flags & ANYOF_UNICODE) |
| 4463 | sv_catpv(sv, "{unicode}"); |
| 4464 | else if (flags & ANYOF_UNICODE_ALL) |
| 4465 | sv_catpv(sv, "{all-unicode}"); |
| 4466 | |
| 4467 | { |
| 4468 | SV *lv; |
| 4469 | SV *sw = regclass_swash(o, FALSE, &lv); |
| 4470 | |
| 4471 | if (lv) { |
| 4472 | if (sw) { |
| 4473 | UV i; |
| 4474 | U8 s[UTF8_MAXLEN+1]; |
| 4475 | |
| 4476 | for (i = 0; i <= 256; i++) { /* just the first 256 */ |
| 4477 | U8 *e = uvchr_to_utf8(s, i); |
| 4478 | |
| 4479 | if (i < 256 && swash_fetch(sw, s, TRUE)) { |
| 4480 | if (rangestart == -1) |
| 4481 | rangestart = i; |
| 4482 | } else if (rangestart != -1) { |
| 4483 | U8 *p; |
| 4484 | |
| 4485 | if (i <= rangestart + 3) |
| 4486 | for (; rangestart < i; rangestart++) { |
| 4487 | for(e = uvchr_to_utf8(s, rangestart), p = s; p < e; p++) |
| 4488 | put_byte(sv, *p); |
| 4489 | } |
| 4490 | else { |
| 4491 | for (e = uvchr_to_utf8(s, rangestart), p = s; p < e; p++) |
| 4492 | put_byte(sv, *p); |
| 4493 | sv_catpv(sv, "-"); |
| 4494 | for (e = uvchr_to_utf8(s, i - 1), p = s; p < e; p++) |
| 4495 | put_byte(sv, *p); |
| 4496 | } |
| 4497 | rangestart = -1; |
| 4498 | } |
| 4499 | } |
| 4500 | |
| 4501 | sv_catpv(sv, "..."); /* et cetera */ |
| 4502 | } |
| 4503 | |
| 4504 | { |
| 4505 | char *s = savepv(SvPVX(lv)); |
| 4506 | char *origs = s; |
| 4507 | |
| 4508 | while(*s && *s != '\n') s++; |
| 4509 | |
| 4510 | if (*s == '\n') { |
| 4511 | char *t = ++s; |
| 4512 | |
| 4513 | while (*s) { |
| 4514 | if (*s == '\n') |
| 4515 | *s = ' '; |
| 4516 | s++; |
| 4517 | } |
| 4518 | if (s[-1] == ' ') |
| 4519 | s[-1] = 0; |
| 4520 | |
| 4521 | sv_catpv(sv, t); |
| 4522 | } |
| 4523 | |
| 4524 | Safefree(origs); |
| 4525 | } |
| 4526 | } |
| 4527 | } |
| 4528 | |
| 4529 | Perl_sv_catpvf(aTHX_ sv, "%s]", PL_colors[1]); |
| 4530 | } |
| 4531 | else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH)) |
| 4532 | Perl_sv_catpvf(aTHX_ sv, "[-%d]", o->flags); |
| 4533 | #endif /* DEBUGGING */ |
| 4534 | } |
| 4535 | |
| 4536 | SV * |
| 4537 | Perl_re_intuit_string(pTHX_ regexp *prog) |
| 4538 | { /* Assume that RE_INTUIT is set */ |
| 4539 | DEBUG_r( |
| 4540 | { STRLEN n_a; |
| 4541 | char *s = SvPV(prog->check_substr,n_a); |
| 4542 | |
| 4543 | if (!PL_colorset) reginitcolors(); |
| 4544 | PerlIO_printf(Perl_debug_log, |
| 4545 | "%sUsing REx substr:%s `%s%.60s%s%s'\n", |
| 4546 | PL_colors[4],PL_colors[5],PL_colors[0], |
| 4547 | s, |
| 4548 | PL_colors[1], |
| 4549 | (strlen(s) > 60 ? "..." : "")); |
| 4550 | } ); |
| 4551 | |
| 4552 | return prog->check_substr; |
| 4553 | } |
| 4554 | |
| 4555 | void |
| 4556 | Perl_pregfree(pTHX_ struct regexp *r) |
| 4557 | { |
| 4558 | DEBUG_r(if (!PL_colorset) reginitcolors()); |
| 4559 | |
| 4560 | if (!r || (--r->refcnt > 0)) |
| 4561 | return; |
| 4562 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
| 4563 | "%sFreeing REx:%s `%s%.60s%s%s'\n", |
| 4564 | PL_colors[4],PL_colors[5],PL_colors[0], |
| 4565 | r->precomp, |
| 4566 | PL_colors[1], |
| 4567 | (strlen(r->precomp) > 60 ? "..." : ""))); |
| 4568 | |
| 4569 | if (r->precomp) |
| 4570 | Safefree(r->precomp); |
| 4571 | if (r->offsets) /* 20010421 MJD */ |
| 4572 | Safefree(r->offsets); |
| 4573 | if (RX_MATCH_COPIED(r)) |
| 4574 | Safefree(r->subbeg); |
| 4575 | if (r->substrs) { |
| 4576 | if (r->anchored_substr) |
| 4577 | SvREFCNT_dec(r->anchored_substr); |
| 4578 | if (r->float_substr) |
| 4579 | SvREFCNT_dec(r->float_substr); |
| 4580 | Safefree(r->substrs); |
| 4581 | } |
| 4582 | if (r->data) { |
| 4583 | int n = r->data->count; |
| 4584 | AV* new_comppad = NULL; |
| 4585 | AV* old_comppad; |
| 4586 | SV** old_curpad; |
| 4587 | |
| 4588 | while (--n >= 0) { |
| 4589 | /* If you add a ->what type here, update the comment in regcomp.h */ |
| 4590 | switch (r->data->what[n]) { |
| 4591 | case 's': |
| 4592 | SvREFCNT_dec((SV*)r->data->data[n]); |
| 4593 | break; |
| 4594 | case 'f': |
| 4595 | Safefree(r->data->data[n]); |
| 4596 | break; |
| 4597 | case 'p': |
| 4598 | new_comppad = (AV*)r->data->data[n]; |
| 4599 | break; |
| 4600 | case 'o': |
| 4601 | if (new_comppad == NULL) |
| 4602 | Perl_croak(aTHX_ "panic: pregfree comppad"); |
| 4603 | old_comppad = PL_comppad; |
| 4604 | old_curpad = PL_curpad; |
| 4605 | /* Watch out for global destruction's random ordering. */ |
| 4606 | if (SvTYPE(new_comppad) == SVt_PVAV) { |
| 4607 | PL_comppad = new_comppad; |
| 4608 | PL_curpad = AvARRAY(new_comppad); |
| 4609 | } |
| 4610 | else |
| 4611 | PL_curpad = NULL; |
| 4612 | |
| 4613 | if (!OpREFCNT_dec((OP_4tree*)r->data->data[n])) { |
| 4614 | op_free((OP_4tree*)r->data->data[n]); |
| 4615 | } |
| 4616 | |
| 4617 | PL_comppad = old_comppad; |
| 4618 | PL_curpad = old_curpad; |
| 4619 | SvREFCNT_dec((SV*)new_comppad); |
| 4620 | new_comppad = NULL; |
| 4621 | break; |
| 4622 | case 'n': |
| 4623 | break; |
| 4624 | default: |
| 4625 | Perl_croak(aTHX_ "panic: regfree data code '%c'", r->data->what[n]); |
| 4626 | } |
| 4627 | } |
| 4628 | Safefree(r->data->what); |
| 4629 | Safefree(r->data); |
| 4630 | } |
| 4631 | Safefree(r->startp); |
| 4632 | Safefree(r->endp); |
| 4633 | Safefree(r); |
| 4634 | } |
| 4635 | |
| 4636 | /* |
| 4637 | - regnext - dig the "next" pointer out of a node |
| 4638 | * |
| 4639 | * [Note, when REGALIGN is defined there are two places in regmatch() |
| 4640 | * that bypass this code for speed.] |
| 4641 | */ |
| 4642 | regnode * |
| 4643 | Perl_regnext(pTHX_ register regnode *p) |
| 4644 | { |
| 4645 | register I32 offset; |
| 4646 | |
| 4647 | if (p == &PL_regdummy) |
| 4648 | return(NULL); |
| 4649 | |
| 4650 | offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p)); |
| 4651 | if (offset == 0) |
| 4652 | return(NULL); |
| 4653 | |
| 4654 | return(p+offset); |
| 4655 | } |
| 4656 | |
| 4657 | STATIC void |
| 4658 | S_re_croak2(pTHX_ const char* pat1,const char* pat2,...) |
| 4659 | { |
| 4660 | va_list args; |
| 4661 | STRLEN l1 = strlen(pat1); |
| 4662 | STRLEN l2 = strlen(pat2); |
| 4663 | char buf[512]; |
| 4664 | SV *msv; |
| 4665 | char *message; |
| 4666 | |
| 4667 | if (l1 > 510) |
| 4668 | l1 = 510; |
| 4669 | if (l1 + l2 > 510) |
| 4670 | l2 = 510 - l1; |
| 4671 | Copy(pat1, buf, l1 , char); |
| 4672 | Copy(pat2, buf + l1, l2 , char); |
| 4673 | buf[l1 + l2] = '\n'; |
| 4674 | buf[l1 + l2 + 1] = '\0'; |
| 4675 | #ifdef I_STDARG |
| 4676 | /* ANSI variant takes additional second argument */ |
| 4677 | va_start(args, pat2); |
| 4678 | #else |
| 4679 | va_start(args); |
| 4680 | #endif |
| 4681 | msv = vmess(buf, &args); |
| 4682 | va_end(args); |
| 4683 | message = SvPV(msv,l1); |
| 4684 | if (l1 > 512) |
| 4685 | l1 = 512; |
| 4686 | Copy(message, buf, l1 , char); |
| 4687 | buf[l1] = '\0'; /* Overwrite \n */ |
| 4688 | Perl_croak(aTHX_ "%s", buf); |
| 4689 | } |
| 4690 | |
| 4691 | /* XXX Here's a total kludge. But we need to re-enter for swash routines. */ |
| 4692 | |
| 4693 | void |
| 4694 | Perl_save_re_context(pTHX) |
| 4695 | { |
| 4696 | #if 0 |
| 4697 | SAVEPPTR(RExC_precomp); /* uncompiled string. */ |
| 4698 | SAVEI32(RExC_npar); /* () count. */ |
| 4699 | SAVEI32(RExC_size); /* Code size. */ |
| 4700 | SAVEI16(RExC_flags16); /* are we folding, multilining? */ |
| 4701 | SAVEVPTR(RExC_rx); /* from regcomp.c */ |
| 4702 | SAVEI32(RExC_seen); /* from regcomp.c */ |
| 4703 | SAVEI32(RExC_sawback); /* Did we see \1, ...? */ |
| 4704 | SAVEI32(RExC_naughty); /* How bad is this pattern? */ |
| 4705 | SAVEVPTR(RExC_emit); /* Code-emit pointer; ®dummy = don't */ |
| 4706 | SAVEPPTR(RExC_end); /* End of input for compile */ |
| 4707 | SAVEPPTR(RExC_parse); /* Input-scan pointer. */ |
| 4708 | #endif |
| 4709 | |
| 4710 | SAVEI32(PL_reg_flags); /* from regexec.c */ |
| 4711 | SAVEPPTR(PL_bostr); |
| 4712 | SAVEPPTR(PL_reginput); /* String-input pointer. */ |
| 4713 | SAVEPPTR(PL_regbol); /* Beginning of input, for ^ check. */ |
| 4714 | SAVEPPTR(PL_regeol); /* End of input, for $ check. */ |
| 4715 | SAVEVPTR(PL_regstartp); /* Pointer to startp array. */ |
| 4716 | SAVEVPTR(PL_regendp); /* Ditto for endp. */ |
| 4717 | SAVEVPTR(PL_reglastparen); /* Similarly for lastparen. */ |
| 4718 | SAVEPPTR(PL_regtill); /* How far we are required to go. */ |
| 4719 | SAVEGENERICPV(PL_reg_start_tmp); /* from regexec.c */ |
| 4720 | PL_reg_start_tmp = 0; |
| 4721 | SAVEI32(PL_reg_start_tmpl); /* from regexec.c */ |
| 4722 | PL_reg_start_tmpl = 0; |
| 4723 | SAVEVPTR(PL_regdata); |
| 4724 | SAVEI32(PL_reg_eval_set); /* from regexec.c */ |
| 4725 | SAVEI32(PL_regnarrate); /* from regexec.c */ |
| 4726 | SAVEVPTR(PL_regprogram); /* from regexec.c */ |
| 4727 | SAVEINT(PL_regindent); /* from regexec.c */ |
| 4728 | SAVEVPTR(PL_regcc); /* from regexec.c */ |
| 4729 | SAVEVPTR(PL_curcop); |
| 4730 | SAVEVPTR(PL_reg_call_cc); /* from regexec.c */ |
| 4731 | SAVEVPTR(PL_reg_re); /* from regexec.c */ |
| 4732 | SAVEPPTR(PL_reg_ganch); /* from regexec.c */ |
| 4733 | SAVESPTR(PL_reg_sv); /* from regexec.c */ |
| 4734 | SAVEI8(PL_reg_match_utf8); /* from regexec.c */ |
| 4735 | SAVEVPTR(PL_reg_magic); /* from regexec.c */ |
| 4736 | SAVEI32(PL_reg_oldpos); /* from regexec.c */ |
| 4737 | SAVEVPTR(PL_reg_oldcurpm); /* from regexec.c */ |
| 4738 | SAVEVPTR(PL_reg_curpm); /* from regexec.c */ |
| 4739 | SAVEI32(PL_regnpar); /* () count. */ |
| 4740 | SAVEI32(PL_regsize); /* from regexec.c */ |
| 4741 | #ifdef DEBUGGING |
| 4742 | SAVEPPTR(PL_reg_starttry); /* from regexec.c */ |
| 4743 | #endif |
| 4744 | } |
| 4745 | |
| 4746 | static void |
| 4747 | clear_re(pTHX_ void *r) |
| 4748 | { |
| 4749 | ReREFCNT_dec((regexp *)r); |
| 4750 | } |
| 4751 | |