Commit | Line | Data |
---|---|---|
a0d0e21e LW |
1 | /* regcomp.c |
2 | */ | |
3 | ||
4 | /* | |
4ac71550 TC |
5 | * 'A fair jaw-cracker dwarf-language must be.' --Samwise Gamgee |
6 | * | |
7 | * [p.285 of _The Lord of the Rings_, II/iii: "The Ring Goes South"] | |
a0d0e21e LW |
8 | */ |
9 | ||
61296642 DM |
10 | /* This file contains functions for compiling a regular expression. See |
11 | * also regexec.c which funnily enough, contains functions for executing | |
166f8a29 | 12 | * a regular expression. |
e4a054ea DM |
13 | * |
14 | * This file is also copied at build time to ext/re/re_comp.c, where | |
15 | * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT. | |
16 | * This causes the main functions to be compiled under new names and with | |
17 | * debugging support added, which makes "use re 'debug'" work. | |
166f8a29 DM |
18 | */ |
19 | ||
a687059c LW |
20 | /* NOTE: this is derived from Henry Spencer's regexp code, and should not |
21 | * confused with the original package (see point 3 below). Thanks, Henry! | |
22 | */ | |
23 | ||
24 | /* Additional note: this code is very heavily munged from Henry's version | |
25 | * in places. In some spots I've traded clarity for efficiency, so don't | |
26 | * blame Henry for some of the lack of readability. | |
27 | */ | |
28 | ||
e50aee73 | 29 | /* The names of the functions have been changed from regcomp and |
3b753521 | 30 | * regexec to pregcomp and pregexec in order to avoid conflicts |
e50aee73 AD |
31 | * with the POSIX routines of the same names. |
32 | */ | |
33 | ||
b9d5759e | 34 | #ifdef PERL_EXT_RE_BUILD |
54df2634 | 35 | #include "re_top.h" |
b81d288d | 36 | #endif |
56953603 | 37 | |
a687059c | 38 | /* |
e50aee73 | 39 | * pregcomp and pregexec -- regsub and regerror are not used in perl |
a687059c LW |
40 | * |
41 | * Copyright (c) 1986 by University of Toronto. | |
42 | * Written by Henry Spencer. Not derived from licensed software. | |
43 | * | |
44 | * Permission is granted to anyone to use this software for any | |
45 | * purpose on any computer system, and to redistribute it freely, | |
46 | * subject to the following restrictions: | |
47 | * | |
48 | * 1. The author is not responsible for the consequences of use of | |
49 | * this software, no matter how awful, even if they arise | |
50 | * from defects in it. | |
51 | * | |
52 | * 2. The origin of this software must not be misrepresented, either | |
53 | * by explicit claim or by omission. | |
54 | * | |
55 | * 3. Altered versions must be plainly marked as such, and must not | |
56 | * be misrepresented as being the original software. | |
57 | * | |
58 | * | |
59 | **** Alterations to Henry's code are... | |
60 | **** | |
4bb101f2 | 61 | **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
1129b882 NC |
62 | **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
63 | **** by Larry Wall and others | |
a687059c | 64 | **** |
9ef589d8 LW |
65 | **** You may distribute under the terms of either the GNU General Public |
66 | **** License or the Artistic License, as specified in the README file. | |
67 | ||
a687059c LW |
68 | * |
69 | * Beware that some of this code is subtly aware of the way operator | |
70 | * precedence is structured in regular expressions. Serious changes in | |
71 | * regular-expression syntax might require a total rethink. | |
72 | */ | |
73 | #include "EXTERN.h" | |
864dbfa3 | 74 | #define PERL_IN_REGCOMP_C |
a687059c | 75 | #include "perl.h" |
d06ea78c | 76 | |
acfe0abc | 77 | #ifndef PERL_IN_XSUB_RE |
d06ea78c GS |
78 | # include "INTERN.h" |
79 | #endif | |
c277df42 IZ |
80 | |
81 | #define REG_COMP_C | |
54df2634 NC |
82 | #ifdef PERL_IN_XSUB_RE |
83 | # include "re_comp.h" | |
84 | #else | |
85 | # include "regcomp.h" | |
86 | #endif | |
a687059c | 87 | |
04e98a4d AD |
88 | #include "dquote_static.c" |
89 | ||
d4cce5f1 | 90 | #ifdef op |
11343788 | 91 | #undef op |
d4cce5f1 | 92 | #endif /* op */ |
11343788 | 93 | |
fe14fcc3 | 94 | #ifdef MSDOS |
7e4e8c89 | 95 | # if defined(BUGGY_MSC6) |
fe14fcc3 | 96 | /* MSC 6.00A breaks on op/regexp.t test 85 unless we turn this off */ |
7e4e8c89 | 97 | # pragma optimize("a",off) |
fe14fcc3 | 98 | /* But MSC 6.00A is happy with 'w', for aliases only across function calls*/ |
7e4e8c89 NC |
99 | # pragma optimize("w",on ) |
100 | # endif /* BUGGY_MSC6 */ | |
fe14fcc3 LW |
101 | #endif /* MSDOS */ |
102 | ||
a687059c LW |
103 | #ifndef STATIC |
104 | #define STATIC static | |
105 | #endif | |
106 | ||
830247a4 | 107 | typedef struct RExC_state_t { |
e2509266 | 108 | U32 flags; /* are we folding, multilining? */ |
830247a4 | 109 | char *precomp; /* uncompiled string. */ |
288b8c02 | 110 | REGEXP *rx_sv; /* The SV that is the regexp. */ |
f8fc2ecf YO |
111 | regexp *rx; /* perl core regexp structure */ |
112 | regexp_internal *rxi; /* internal data for regexp object pprivate field */ | |
fac92740 | 113 | char *start; /* Start of input for compile */ |
830247a4 IZ |
114 | char *end; /* End of input for compile */ |
115 | char *parse; /* Input-scan pointer. */ | |
116 | I32 whilem_seen; /* number of WHILEM in this expr */ | |
fac92740 | 117 | regnode *emit_start; /* Start of emitted-code area */ |
3b57cd43 | 118 | regnode *emit_bound; /* First regnode outside of the allocated space */ |
ffc61ed2 | 119 | regnode *emit; /* Code-emit pointer; ®dummy = don't = compiling */ |
830247a4 IZ |
120 | I32 naughty; /* How bad is this pattern? */ |
121 | I32 sawback; /* Did we see \1, ...? */ | |
122 | U32 seen; | |
123 | I32 size; /* Code size. */ | |
c74340f9 YO |
124 | I32 npar; /* Capture buffer count, (OPEN). */ |
125 | I32 cpar; /* Capture buffer count, (CLOSE). */ | |
e2e6a0f1 | 126 | I32 nestroot; /* root parens we are in - used by accept */ |
830247a4 IZ |
127 | I32 extralen; |
128 | I32 seen_zerolen; | |
129 | I32 seen_evals; | |
40d049e4 YO |
130 | regnode **open_parens; /* pointers to open parens */ |
131 | regnode **close_parens; /* pointers to close parens */ | |
132 | regnode *opend; /* END node in program */ | |
02daf0ab YO |
133 | I32 utf8; /* whether the pattern is utf8 or not */ |
134 | I32 orig_utf8; /* whether the pattern was originally in utf8 */ | |
135 | /* XXX use this for future optimisation of case | |
136 | * where pattern must be upgraded to utf8. */ | |
81714fb9 | 137 | HV *paren_names; /* Paren names */ |
1f1031fe | 138 | |
40d049e4 YO |
139 | regnode **recurse; /* Recurse regops */ |
140 | I32 recurse_count; /* Number of recurse regops */ | |
830247a4 IZ |
141 | #if ADD_TO_REGEXEC |
142 | char *starttry; /* -Dr: where regtry was called. */ | |
143 | #define RExC_starttry (pRExC_state->starttry) | |
144 | #endif | |
3dab1dad | 145 | #ifdef DEBUGGING |
be8e71aa | 146 | const char *lastparse; |
3dab1dad | 147 | I32 lastnum; |
1f1031fe | 148 | AV *paren_name_list; /* idx -> name */ |
3dab1dad YO |
149 | #define RExC_lastparse (pRExC_state->lastparse) |
150 | #define RExC_lastnum (pRExC_state->lastnum) | |
1f1031fe | 151 | #define RExC_paren_name_list (pRExC_state->paren_name_list) |
3dab1dad | 152 | #endif |
830247a4 IZ |
153 | } RExC_state_t; |
154 | ||
e2509266 | 155 | #define RExC_flags (pRExC_state->flags) |
830247a4 | 156 | #define RExC_precomp (pRExC_state->precomp) |
288b8c02 | 157 | #define RExC_rx_sv (pRExC_state->rx_sv) |
830247a4 | 158 | #define RExC_rx (pRExC_state->rx) |
f8fc2ecf | 159 | #define RExC_rxi (pRExC_state->rxi) |
fac92740 | 160 | #define RExC_start (pRExC_state->start) |
830247a4 IZ |
161 | #define RExC_end (pRExC_state->end) |
162 | #define RExC_parse (pRExC_state->parse) | |
163 | #define RExC_whilem_seen (pRExC_state->whilem_seen) | |
7122b237 YO |
164 | #ifdef RE_TRACK_PATTERN_OFFSETS |
165 | #define RExC_offsets (pRExC_state->rxi->u.offsets) /* I am not like the others */ | |
166 | #endif | |
830247a4 | 167 | #define RExC_emit (pRExC_state->emit) |
fac92740 | 168 | #define RExC_emit_start (pRExC_state->emit_start) |
3b57cd43 | 169 | #define RExC_emit_bound (pRExC_state->emit_bound) |
830247a4 IZ |
170 | #define RExC_naughty (pRExC_state->naughty) |
171 | #define RExC_sawback (pRExC_state->sawback) | |
172 | #define RExC_seen (pRExC_state->seen) | |
173 | #define RExC_size (pRExC_state->size) | |
174 | #define RExC_npar (pRExC_state->npar) | |
e2e6a0f1 | 175 | #define RExC_nestroot (pRExC_state->nestroot) |
830247a4 IZ |
176 | #define RExC_extralen (pRExC_state->extralen) |
177 | #define RExC_seen_zerolen (pRExC_state->seen_zerolen) | |
178 | #define RExC_seen_evals (pRExC_state->seen_evals) | |
1aa99e6b | 179 | #define RExC_utf8 (pRExC_state->utf8) |
02daf0ab | 180 | #define RExC_orig_utf8 (pRExC_state->orig_utf8) |
40d049e4 YO |
181 | #define RExC_open_parens (pRExC_state->open_parens) |
182 | #define RExC_close_parens (pRExC_state->close_parens) | |
183 | #define RExC_opend (pRExC_state->opend) | |
81714fb9 | 184 | #define RExC_paren_names (pRExC_state->paren_names) |
40d049e4 YO |
185 | #define RExC_recurse (pRExC_state->recurse) |
186 | #define RExC_recurse_count (pRExC_state->recurse_count) | |
830247a4 | 187 | |
cde0cee5 | 188 | |
a687059c LW |
189 | #define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?') |
190 | #define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \ | |
191 | ((*s) == '{' && regcurly(s))) | |
a687059c | 192 | |
35c8bce7 LW |
193 | #ifdef SPSTART |
194 | #undef SPSTART /* dratted cpp namespace... */ | |
195 | #endif | |
a687059c LW |
196 | /* |
197 | * Flags to be passed up and down. | |
198 | */ | |
a687059c | 199 | #define WORST 0 /* Worst case. */ |
a3b492c3 | 200 | #define HASWIDTH 0x01 /* Known to match non-null strings. */ |
fda99bee KW |
201 | |
202 | /* Simple enough to be STAR/PLUS operand, in an EXACT node must be a single | |
203 | * character, and if utf8, must be invariant. */ | |
204 | #define SIMPLE 0x02 | |
a3b492c3 YO |
205 | #define SPSTART 0x04 /* Starts with * or +. */ |
206 | #define TRYAGAIN 0x08 /* Weeded out a declaration. */ | |
207 | #define POSTPONED 0x10 /* (?1),(?&name), (??{...}) or similar */ | |
a687059c | 208 | |
3dab1dad YO |
209 | #define REG_NODE_NUM(x) ((x) ? (int)((x)-RExC_emit_start) : -1) |
210 | ||
07be1b83 YO |
211 | /* whether trie related optimizations are enabled */ |
212 | #if PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION | |
213 | #define TRIE_STUDY_OPT | |
786e8c11 | 214 | #define FULL_TRIE_STUDY |
07be1b83 YO |
215 | #define TRIE_STCLASS |
216 | #endif | |
1de06328 YO |
217 | |
218 | ||
40d049e4 YO |
219 | |
220 | #define PBYTE(u8str,paren) ((U8*)(u8str))[(paren) >> 3] | |
221 | #define PBITVAL(paren) (1 << ((paren) & 7)) | |
222 | #define PAREN_TEST(u8str,paren) ( PBYTE(u8str,paren) & PBITVAL(paren)) | |
223 | #define PAREN_SET(u8str,paren) PBYTE(u8str,paren) |= PBITVAL(paren) | |
224 | #define PAREN_UNSET(u8str,paren) PBYTE(u8str,paren) &= (~PBITVAL(paren)) | |
225 | ||
bbd61b5f KW |
226 | /* If not already in utf8, do a longjmp back to the beginning */ |
227 | #define UTF8_LONGJMP 42 /* Choose a value not likely to ever conflict */ | |
228 | #define REQUIRE_UTF8 STMT_START { \ | |
229 | if (! UTF) JMPENV_JUMP(UTF8_LONGJMP); \ | |
230 | } STMT_END | |
40d049e4 | 231 | |
1de06328 YO |
232 | /* About scan_data_t. |
233 | ||
234 | During optimisation we recurse through the regexp program performing | |
235 | various inplace (keyhole style) optimisations. In addition study_chunk | |
236 | and scan_commit populate this data structure with information about | |
237 | what strings MUST appear in the pattern. We look for the longest | |
3b753521 | 238 | string that must appear at a fixed location, and we look for the |
1de06328 YO |
239 | longest string that may appear at a floating location. So for instance |
240 | in the pattern: | |
241 | ||
242 | /FOO[xX]A.*B[xX]BAR/ | |
243 | ||
244 | Both 'FOO' and 'A' are fixed strings. Both 'B' and 'BAR' are floating | |
245 | strings (because they follow a .* construct). study_chunk will identify | |
246 | both FOO and BAR as being the longest fixed and floating strings respectively. | |
247 | ||
248 | The strings can be composites, for instance | |
249 | ||
250 | /(f)(o)(o)/ | |
251 | ||
252 | will result in a composite fixed substring 'foo'. | |
253 | ||
254 | For each string some basic information is maintained: | |
255 | ||
256 | - offset or min_offset | |
257 | This is the position the string must appear at, or not before. | |
258 | It also implicitly (when combined with minlenp) tells us how many | |
3b753521 FN |
259 | characters must match before the string we are searching for. |
260 | Likewise when combined with minlenp and the length of the string it | |
1de06328 YO |
261 | tells us how many characters must appear after the string we have |
262 | found. | |
263 | ||
264 | - max_offset | |
265 | Only used for floating strings. This is the rightmost point that | |
3b753521 | 266 | the string can appear at. If set to I32 max it indicates that the |
1de06328 YO |
267 | string can occur infinitely far to the right. |
268 | ||
269 | - minlenp | |
270 | A pointer to the minimum length of the pattern that the string | |
271 | was found inside. This is important as in the case of positive | |
272 | lookahead or positive lookbehind we can have multiple patterns | |
273 | involved. Consider | |
274 | ||
275 | /(?=FOO).*F/ | |
276 | ||
277 | The minimum length of the pattern overall is 3, the minimum length | |
278 | of the lookahead part is 3, but the minimum length of the part that | |
279 | will actually match is 1. So 'FOO's minimum length is 3, but the | |
280 | minimum length for the F is 1. This is important as the minimum length | |
281 | is used to determine offsets in front of and behind the string being | |
282 | looked for. Since strings can be composites this is the length of the | |
283 | pattern at the time it was commited with a scan_commit. Note that | |
284 | the length is calculated by study_chunk, so that the minimum lengths | |
285 | are not known until the full pattern has been compiled, thus the | |
286 | pointer to the value. | |
287 | ||
288 | - lookbehind | |
289 | ||
290 | In the case of lookbehind the string being searched for can be | |
291 | offset past the start point of the final matching string. | |
292 | If this value was just blithely removed from the min_offset it would | |
293 | invalidate some of the calculations for how many chars must match | |
294 | before or after (as they are derived from min_offset and minlen and | |
295 | the length of the string being searched for). | |
296 | When the final pattern is compiled and the data is moved from the | |
297 | scan_data_t structure into the regexp structure the information | |
298 | about lookbehind is factored in, with the information that would | |
299 | have been lost precalculated in the end_shift field for the | |
300 | associated string. | |
301 | ||
302 | The fields pos_min and pos_delta are used to store the minimum offset | |
303 | and the delta to the maximum offset at the current point in the pattern. | |
304 | ||
305 | */ | |
2c2d71f5 JH |
306 | |
307 | typedef struct scan_data_t { | |
1de06328 YO |
308 | /*I32 len_min; unused */ |
309 | /*I32 len_delta; unused */ | |
2c2d71f5 JH |
310 | I32 pos_min; |
311 | I32 pos_delta; | |
312 | SV *last_found; | |
1de06328 | 313 | I32 last_end; /* min value, <0 unless valid. */ |
2c2d71f5 JH |
314 | I32 last_start_min; |
315 | I32 last_start_max; | |
1de06328 YO |
316 | SV **longest; /* Either &l_fixed, or &l_float. */ |
317 | SV *longest_fixed; /* longest fixed string found in pattern */ | |
318 | I32 offset_fixed; /* offset where it starts */ | |
319 | I32 *minlen_fixed; /* pointer to the minlen relevent to the string */ | |
320 | I32 lookbehind_fixed; /* is the position of the string modfied by LB */ | |
321 | SV *longest_float; /* longest floating string found in pattern */ | |
322 | I32 offset_float_min; /* earliest point in string it can appear */ | |
323 | I32 offset_float_max; /* latest point in string it can appear */ | |
324 | I32 *minlen_float; /* pointer to the minlen relevent to the string */ | |
325 | I32 lookbehind_float; /* is the position of the string modified by LB */ | |
2c2d71f5 JH |
326 | I32 flags; |
327 | I32 whilem_c; | |
cb434fcc | 328 | I32 *last_closep; |
653099ff | 329 | struct regnode_charclass_class *start_class; |
2c2d71f5 JH |
330 | } scan_data_t; |
331 | ||
a687059c | 332 | /* |
e50aee73 | 333 | * Forward declarations for pregcomp()'s friends. |
a687059c | 334 | */ |
a0d0e21e | 335 | |
27da23d5 | 336 | static const scan_data_t zero_scan_data = |
1de06328 | 337 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,0}; |
c277df42 IZ |
338 | |
339 | #define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL) | |
07be1b83 YO |
340 | #define SF_BEFORE_SEOL 0x0001 |
341 | #define SF_BEFORE_MEOL 0x0002 | |
c277df42 IZ |
342 | #define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL) |
343 | #define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL) | |
344 | ||
09b7f37c CB |
345 | #ifdef NO_UNARY_PLUS |
346 | # define SF_FIX_SHIFT_EOL (0+2) | |
347 | # define SF_FL_SHIFT_EOL (0+4) | |
348 | #else | |
349 | # define SF_FIX_SHIFT_EOL (+2) | |
350 | # define SF_FL_SHIFT_EOL (+4) | |
351 | #endif | |
c277df42 IZ |
352 | |
353 | #define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL) | |
354 | #define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL) | |
355 | ||
356 | #define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL) | |
357 | #define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */ | |
07be1b83 YO |
358 | #define SF_IS_INF 0x0040 |
359 | #define SF_HAS_PAR 0x0080 | |
360 | #define SF_IN_PAR 0x0100 | |
361 | #define SF_HAS_EVAL 0x0200 | |
362 | #define SCF_DO_SUBSTR 0x0400 | |
653099ff GS |
363 | #define SCF_DO_STCLASS_AND 0x0800 |
364 | #define SCF_DO_STCLASS_OR 0x1000 | |
365 | #define SCF_DO_STCLASS (SCF_DO_STCLASS_AND|SCF_DO_STCLASS_OR) | |
e1901655 | 366 | #define SCF_WHILEM_VISITED_POS 0x2000 |
c277df42 | 367 | |
786e8c11 | 368 | #define SCF_TRIE_RESTUDY 0x4000 /* Do restudy? */ |
e2e6a0f1 | 369 | #define SCF_SEEN_ACCEPT 0x8000 |
07be1b83 | 370 | |
43fead97 KW |
371 | #define UTF cBOOL(RExC_utf8) |
372 | #define LOC cBOOL(RExC_flags & RXf_PMf_LOCALE) | |
373 | #define UNI_SEMANTICS cBOOL(RExC_flags & RXf_PMf_UNICODE) | |
374 | #define FOLD cBOOL(RExC_flags & RXf_PMf_FOLD) | |
a0ed51b3 | 375 | |
ffc61ed2 | 376 | #define OOB_UNICODE 12345678 |
93733859 | 377 | #define OOB_NAMEDCLASS -1 |
b8c5462f | 378 | |
a0ed51b3 LW |
379 | #define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv)) |
380 | #define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b) | |
381 | ||
8615cb43 | 382 | |
b45f050a JF |
383 | /* length of regex to show in messages that don't mark a position within */ |
384 | #define RegexLengthToShowInErrorMessages 127 | |
385 | ||
386 | /* | |
387 | * If MARKER[12] are adjusted, be sure to adjust the constants at the top | |
388 | * of t/op/regmesg.t, the tests in t/op/re_tests, and those in | |
389 | * op/pragma/warn/regcomp. | |
390 | */ | |
7253e4e3 RK |
391 | #define MARKER1 "<-- HERE" /* marker as it appears in the description */ |
392 | #define MARKER2 " <-- HERE " /* marker as it appears within the regex */ | |
b81d288d | 393 | |
7253e4e3 | 394 | #define REPORT_LOCATION " in regex; marked by " MARKER1 " in m/%.*s" MARKER2 "%s/" |
b45f050a JF |
395 | |
396 | /* | |
397 | * Calls SAVEDESTRUCTOR_X if needed, then calls Perl_croak with the given | |
398 | * arg. Show regex, up to a maximum length. If it's too long, chop and add | |
399 | * "...". | |
400 | */ | |
58e23c8d | 401 | #define _FAIL(code) STMT_START { \ |
bfed75c6 | 402 | const char *ellipses = ""; \ |
ccb2c380 MP |
403 | IV len = RExC_end - RExC_precomp; \ |
404 | \ | |
405 | if (!SIZE_ONLY) \ | |
288b8c02 | 406 | SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \ |
ccb2c380 MP |
407 | if (len > RegexLengthToShowInErrorMessages) { \ |
408 | /* chop 10 shorter than the max, to ensure meaning of "..." */ \ | |
409 | len = RegexLengthToShowInErrorMessages - 10; \ | |
410 | ellipses = "..."; \ | |
411 | } \ | |
58e23c8d | 412 | code; \ |
ccb2c380 | 413 | } STMT_END |
8615cb43 | 414 | |
58e23c8d YO |
415 | #define FAIL(msg) _FAIL( \ |
416 | Perl_croak(aTHX_ "%s in regex m/%.*s%s/", \ | |
417 | msg, (int)len, RExC_precomp, ellipses)) | |
418 | ||
419 | #define FAIL2(msg,arg) _FAIL( \ | |
420 | Perl_croak(aTHX_ msg " in regex m/%.*s%s/", \ | |
421 | arg, (int)len, RExC_precomp, ellipses)) | |
422 | ||
b45f050a | 423 | /* |
b45f050a JF |
424 | * Simple_vFAIL -- like FAIL, but marks the current location in the scan |
425 | */ | |
ccb2c380 | 426 | #define Simple_vFAIL(m) STMT_START { \ |
a28509cc | 427 | const IV offset = RExC_parse - RExC_precomp; \ |
ccb2c380 MP |
428 | Perl_croak(aTHX_ "%s" REPORT_LOCATION, \ |
429 | m, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
430 | } STMT_END | |
b45f050a JF |
431 | |
432 | /* | |
433 | * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL() | |
434 | */ | |
ccb2c380 MP |
435 | #define vFAIL(m) STMT_START { \ |
436 | if (!SIZE_ONLY) \ | |
288b8c02 | 437 | SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \ |
ccb2c380 MP |
438 | Simple_vFAIL(m); \ |
439 | } STMT_END | |
b45f050a JF |
440 | |
441 | /* | |
442 | * Like Simple_vFAIL(), but accepts two arguments. | |
443 | */ | |
ccb2c380 | 444 | #define Simple_vFAIL2(m,a1) STMT_START { \ |
a28509cc | 445 | const IV offset = RExC_parse - RExC_precomp; \ |
ccb2c380 MP |
446 | S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, \ |
447 | (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
448 | } STMT_END | |
b45f050a JF |
449 | |
450 | /* | |
451 | * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL2(). | |
452 | */ | |
ccb2c380 MP |
453 | #define vFAIL2(m,a1) STMT_START { \ |
454 | if (!SIZE_ONLY) \ | |
288b8c02 | 455 | SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \ |
ccb2c380 MP |
456 | Simple_vFAIL2(m, a1); \ |
457 | } STMT_END | |
b45f050a JF |
458 | |
459 | ||
460 | /* | |
461 | * Like Simple_vFAIL(), but accepts three arguments. | |
462 | */ | |
ccb2c380 | 463 | #define Simple_vFAIL3(m, a1, a2) STMT_START { \ |
a28509cc | 464 | const IV offset = RExC_parse - RExC_precomp; \ |
ccb2c380 MP |
465 | S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, \ |
466 | (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
467 | } STMT_END | |
b45f050a JF |
468 | |
469 | /* | |
470 | * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL3(). | |
471 | */ | |
ccb2c380 MP |
472 | #define vFAIL3(m,a1,a2) STMT_START { \ |
473 | if (!SIZE_ONLY) \ | |
288b8c02 | 474 | SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx_sv); \ |
ccb2c380 MP |
475 | Simple_vFAIL3(m, a1, a2); \ |
476 | } STMT_END | |
b45f050a JF |
477 | |
478 | /* | |
479 | * Like Simple_vFAIL(), but accepts four arguments. | |
480 | */ | |
ccb2c380 | 481 | #define Simple_vFAIL4(m, a1, a2, a3) STMT_START { \ |
a28509cc | 482 | const IV offset = RExC_parse - RExC_precomp; \ |
ccb2c380 MP |
483 | S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, a3, \ |
484 | (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
485 | } STMT_END | |
b45f050a | 486 | |
668c081a | 487 | #define ckWARNreg(loc,m) STMT_START { \ |
a28509cc | 488 | const IV offset = loc - RExC_precomp; \ |
f10f4c18 NC |
489 | Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
490 | (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
ccb2c380 MP |
491 | } STMT_END |
492 | ||
668c081a | 493 | #define ckWARNregdep(loc,m) STMT_START { \ |
a28509cc | 494 | const IV offset = loc - RExC_precomp; \ |
d1d15184 | 495 | Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_REGEXP), \ |
f10f4c18 NC |
496 | m REPORT_LOCATION, \ |
497 | (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
ccb2c380 MP |
498 | } STMT_END |
499 | ||
668c081a | 500 | #define ckWARN2reg(loc, m, a1) STMT_START { \ |
a28509cc | 501 | const IV offset = loc - RExC_precomp; \ |
668c081a | 502 | Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
ccb2c380 MP |
503 | a1, (int)offset, RExC_precomp, RExC_precomp + offset); \ |
504 | } STMT_END | |
505 | ||
506 | #define vWARN3(loc, m, a1, a2) STMT_START { \ | |
a28509cc | 507 | const IV offset = loc - RExC_precomp; \ |
ccb2c380 MP |
508 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
509 | a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
510 | } STMT_END | |
511 | ||
668c081a NC |
512 | #define ckWARN3reg(loc, m, a1, a2) STMT_START { \ |
513 | const IV offset = loc - RExC_precomp; \ | |
514 | Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ | |
515 | a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
516 | } STMT_END | |
517 | ||
ccb2c380 | 518 | #define vWARN4(loc, m, a1, a2, a3) STMT_START { \ |
a28509cc | 519 | const IV offset = loc - RExC_precomp; \ |
ccb2c380 MP |
520 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
521 | a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
522 | } STMT_END | |
523 | ||
668c081a NC |
524 | #define ckWARN4reg(loc, m, a1, a2, a3) STMT_START { \ |
525 | const IV offset = loc - RExC_precomp; \ | |
526 | Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ | |
527 | a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
528 | } STMT_END | |
529 | ||
ccb2c380 | 530 | #define vWARN5(loc, m, a1, a2, a3, a4) STMT_START { \ |
a28509cc | 531 | const IV offset = loc - RExC_precomp; \ |
ccb2c380 MP |
532 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
533 | a1, a2, a3, a4, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
534 | } STMT_END | |
9d1d55b5 | 535 | |
8615cb43 | 536 | |
cd439c50 | 537 | /* Allow for side effects in s */ |
ccb2c380 MP |
538 | #define REGC(c,s) STMT_START { \ |
539 | if (!SIZE_ONLY) *(s) = (c); else (void)(s); \ | |
540 | } STMT_END | |
cd439c50 | 541 | |
fac92740 MJD |
542 | /* Macros for recording node offsets. 20001227 mjd@plover.com |
543 | * Nodes are numbered 1, 2, 3, 4. Node #n's position is recorded in | |
544 | * element 2*n-1 of the array. Element #2n holds the byte length node #n. | |
545 | * Element 0 holds the number n. | |
07be1b83 | 546 | * Position is 1 indexed. |
fac92740 | 547 | */ |
7122b237 YO |
548 | #ifndef RE_TRACK_PATTERN_OFFSETS |
549 | #define Set_Node_Offset_To_R(node,byte) | |
550 | #define Set_Node_Offset(node,byte) | |
551 | #define Set_Cur_Node_Offset | |
552 | #define Set_Node_Length_To_R(node,len) | |
553 | #define Set_Node_Length(node,len) | |
554 | #define Set_Node_Cur_Length(node) | |
555 | #define Node_Offset(n) | |
556 | #define Node_Length(n) | |
557 | #define Set_Node_Offset_Length(node,offset,len) | |
558 | #define ProgLen(ri) ri->u.proglen | |
559 | #define SetProgLen(ri,x) ri->u.proglen = x | |
560 | #else | |
561 | #define ProgLen(ri) ri->u.offsets[0] | |
562 | #define SetProgLen(ri,x) ri->u.offsets[0] = x | |
ccb2c380 MP |
563 | #define Set_Node_Offset_To_R(node,byte) STMT_START { \ |
564 | if (! SIZE_ONLY) { \ | |
565 | MJD_OFFSET_DEBUG(("** (%d) offset of node %d is %d.\n", \ | |
2a49f0f5 | 566 | __LINE__, (int)(node), (int)(byte))); \ |
ccb2c380 | 567 | if((node) < 0) { \ |
551405c4 | 568 | Perl_croak(aTHX_ "value of node is %d in Offset macro", (int)(node)); \ |
ccb2c380 MP |
569 | } else { \ |
570 | RExC_offsets[2*(node)-1] = (byte); \ | |
571 | } \ | |
572 | } \ | |
573 | } STMT_END | |
574 | ||
575 | #define Set_Node_Offset(node,byte) \ | |
576 | Set_Node_Offset_To_R((node)-RExC_emit_start, (byte)-RExC_start) | |
577 | #define Set_Cur_Node_Offset Set_Node_Offset(RExC_emit, RExC_parse) | |
578 | ||
579 | #define Set_Node_Length_To_R(node,len) STMT_START { \ | |
580 | if (! SIZE_ONLY) { \ | |
581 | MJD_OFFSET_DEBUG(("** (%d) size of node %d is %d.\n", \ | |
551405c4 | 582 | __LINE__, (int)(node), (int)(len))); \ |
ccb2c380 | 583 | if((node) < 0) { \ |
551405c4 | 584 | Perl_croak(aTHX_ "value of node is %d in Length macro", (int)(node)); \ |
ccb2c380 MP |
585 | } else { \ |
586 | RExC_offsets[2*(node)] = (len); \ | |
587 | } \ | |
588 | } \ | |
589 | } STMT_END | |
590 | ||
591 | #define Set_Node_Length(node,len) \ | |
592 | Set_Node_Length_To_R((node)-RExC_emit_start, len) | |
593 | #define Set_Cur_Node_Length(len) Set_Node_Length(RExC_emit, len) | |
594 | #define Set_Node_Cur_Length(node) \ | |
595 | Set_Node_Length(node, RExC_parse - parse_start) | |
fac92740 MJD |
596 | |
597 | /* Get offsets and lengths */ | |
598 | #define Node_Offset(n) (RExC_offsets[2*((n)-RExC_emit_start)-1]) | |
599 | #define Node_Length(n) (RExC_offsets[2*((n)-RExC_emit_start)]) | |
600 | ||
07be1b83 YO |
601 | #define Set_Node_Offset_Length(node,offset,len) STMT_START { \ |
602 | Set_Node_Offset_To_R((node)-RExC_emit_start, (offset)); \ | |
603 | Set_Node_Length_To_R((node)-RExC_emit_start, (len)); \ | |
604 | } STMT_END | |
7122b237 | 605 | #endif |
07be1b83 YO |
606 | |
607 | #if PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS | |
608 | #define EXPERIMENTAL_INPLACESCAN | |
f427392e | 609 | #endif /*PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS*/ |
07be1b83 | 610 | |
304ee84b YO |
611 | #define DEBUG_STUDYDATA(str,data,depth) \ |
612 | DEBUG_OPTIMISE_MORE_r(if(data){ \ | |
1de06328 | 613 | PerlIO_printf(Perl_debug_log, \ |
304ee84b YO |
614 | "%*s" str "Pos:%"IVdf"/%"IVdf \ |
615 | " Flags: 0x%"UVXf" Whilem_c: %"IVdf" Lcp: %"IVdf" %s", \ | |
1de06328 YO |
616 | (int)(depth)*2, "", \ |
617 | (IV)((data)->pos_min), \ | |
618 | (IV)((data)->pos_delta), \ | |
304ee84b | 619 | (UV)((data)->flags), \ |
1de06328 | 620 | (IV)((data)->whilem_c), \ |
304ee84b YO |
621 | (IV)((data)->last_closep ? *((data)->last_closep) : -1), \ |
622 | is_inf ? "INF " : "" \ | |
1de06328 YO |
623 | ); \ |
624 | if ((data)->last_found) \ | |
625 | PerlIO_printf(Perl_debug_log, \ | |
626 | "Last:'%s' %"IVdf":%"IVdf"/%"IVdf" %sFixed:'%s' @ %"IVdf \ | |
627 | " %sFloat: '%s' @ %"IVdf"/%"IVdf"", \ | |
628 | SvPVX_const((data)->last_found), \ | |
629 | (IV)((data)->last_end), \ | |
630 | (IV)((data)->last_start_min), \ | |
631 | (IV)((data)->last_start_max), \ | |
632 | ((data)->longest && \ | |
633 | (data)->longest==&((data)->longest_fixed)) ? "*" : "", \ | |
634 | SvPVX_const((data)->longest_fixed), \ | |
635 | (IV)((data)->offset_fixed), \ | |
636 | ((data)->longest && \ | |
637 | (data)->longest==&((data)->longest_float)) ? "*" : "", \ | |
638 | SvPVX_const((data)->longest_float), \ | |
639 | (IV)((data)->offset_float_min), \ | |
640 | (IV)((data)->offset_float_max) \ | |
641 | ); \ | |
642 | PerlIO_printf(Perl_debug_log,"\n"); \ | |
643 | }); | |
644 | ||
acfe0abc | 645 | static void clear_re(pTHX_ void *r); |
4327152a | 646 | |
653099ff | 647 | /* Mark that we cannot extend a found fixed substring at this point. |
786e8c11 | 648 | Update the longest found anchored substring and the longest found |
653099ff GS |
649 | floating substrings if needed. */ |
650 | ||
4327152a | 651 | STATIC void |
304ee84b | 652 | S_scan_commit(pTHX_ const RExC_state_t *pRExC_state, scan_data_t *data, I32 *minlenp, int is_inf) |
c277df42 | 653 | { |
e1ec3a88 AL |
654 | const STRLEN l = CHR_SVLEN(data->last_found); |
655 | const STRLEN old_l = CHR_SVLEN(*data->longest); | |
1de06328 | 656 | GET_RE_DEBUG_FLAGS_DECL; |
b81d288d | 657 | |
7918f24d NC |
658 | PERL_ARGS_ASSERT_SCAN_COMMIT; |
659 | ||
c277df42 | 660 | if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) { |
6b43b216 | 661 | SvSetMagicSV(*data->longest, data->last_found); |
c277df42 IZ |
662 | if (*data->longest == data->longest_fixed) { |
663 | data->offset_fixed = l ? data->last_start_min : data->pos_min; | |
664 | if (data->flags & SF_BEFORE_EOL) | |
b81d288d | 665 | data->flags |
c277df42 IZ |
666 | |= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL); |
667 | else | |
668 | data->flags &= ~SF_FIX_BEFORE_EOL; | |
1de06328 YO |
669 | data->minlen_fixed=minlenp; |
670 | data->lookbehind_fixed=0; | |
a0ed51b3 | 671 | } |
304ee84b | 672 | else { /* *data->longest == data->longest_float */ |
c277df42 | 673 | data->offset_float_min = l ? data->last_start_min : data->pos_min; |
b81d288d AB |
674 | data->offset_float_max = (l |
675 | ? data->last_start_max | |
c277df42 | 676 | : data->pos_min + data->pos_delta); |
304ee84b | 677 | if (is_inf || (U32)data->offset_float_max > (U32)I32_MAX) |
9051bda5 | 678 | data->offset_float_max = I32_MAX; |
c277df42 | 679 | if (data->flags & SF_BEFORE_EOL) |
b81d288d | 680 | data->flags |
c277df42 IZ |
681 | |= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL); |
682 | else | |
683 | data->flags &= ~SF_FL_BEFORE_EOL; | |
1de06328 YO |
684 | data->minlen_float=minlenp; |
685 | data->lookbehind_float=0; | |
c277df42 IZ |
686 | } |
687 | } | |
688 | SvCUR_set(data->last_found, 0); | |
0eda9292 | 689 | { |
a28509cc | 690 | SV * const sv = data->last_found; |
097eb12c AL |
691 | if (SvUTF8(sv) && SvMAGICAL(sv)) { |
692 | MAGIC * const mg = mg_find(sv, PERL_MAGIC_utf8); | |
693 | if (mg) | |
694 | mg->mg_len = 0; | |
695 | } | |
0eda9292 | 696 | } |
c277df42 IZ |
697 | data->last_end = -1; |
698 | data->flags &= ~SF_BEFORE_EOL; | |
bcdf7404 | 699 | DEBUG_STUDYDATA("commit: ",data,0); |
c277df42 IZ |
700 | } |
701 | ||
653099ff GS |
702 | /* Can match anything (initialization) */ |
703 | STATIC void | |
097eb12c | 704 | S_cl_anything(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl) |
653099ff | 705 | { |
7918f24d NC |
706 | PERL_ARGS_ASSERT_CL_ANYTHING; |
707 | ||
653099ff | 708 | ANYOF_CLASS_ZERO(cl); |
f8bef550 | 709 | ANYOF_BITMAP_SETALL(cl); |
1aa99e6b | 710 | cl->flags = ANYOF_EOS|ANYOF_UNICODE_ALL; |
653099ff GS |
711 | if (LOC) |
712 | cl->flags |= ANYOF_LOCALE; | |
8951c461 | 713 | cl->flags |= ANYOF_FOLD; |
653099ff GS |
714 | } |
715 | ||
716 | /* Can match anything (initialization) */ | |
717 | STATIC int | |
5f66b61c | 718 | S_cl_is_anything(const struct regnode_charclass_class *cl) |
653099ff GS |
719 | { |
720 | int value; | |
721 | ||
7918f24d NC |
722 | PERL_ARGS_ASSERT_CL_IS_ANYTHING; |
723 | ||
aaa51d5e | 724 | for (value = 0; value <= ANYOF_MAX; value += 2) |
653099ff GS |
725 | if (ANYOF_CLASS_TEST(cl, value) && ANYOF_CLASS_TEST(cl, value + 1)) |
726 | return 1; | |
1aa99e6b IH |
727 | if (!(cl->flags & ANYOF_UNICODE_ALL)) |
728 | return 0; | |
10edeb5d | 729 | if (!ANYOF_BITMAP_TESTALLSET((const void*)cl)) |
f8bef550 | 730 | return 0; |
653099ff GS |
731 | return 1; |
732 | } | |
733 | ||
734 | /* Can match anything (initialization) */ | |
735 | STATIC void | |
097eb12c | 736 | S_cl_init(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl) |
653099ff | 737 | { |
7918f24d NC |
738 | PERL_ARGS_ASSERT_CL_INIT; |
739 | ||
8ecf7187 | 740 | Zero(cl, 1, struct regnode_charclass_class); |
653099ff | 741 | cl->type = ANYOF; |
830247a4 | 742 | cl_anything(pRExC_state, cl); |
653099ff GS |
743 | } |
744 | ||
745 | STATIC void | |
097eb12c | 746 | S_cl_init_zero(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl) |
653099ff | 747 | { |
7918f24d NC |
748 | PERL_ARGS_ASSERT_CL_INIT_ZERO; |
749 | ||
8ecf7187 | 750 | Zero(cl, 1, struct regnode_charclass_class); |
653099ff | 751 | cl->type = ANYOF; |
830247a4 | 752 | cl_anything(pRExC_state, cl); |
653099ff GS |
753 | if (LOC) |
754 | cl->flags |= ANYOF_LOCALE; | |
755 | } | |
756 | ||
757 | /* 'And' a given class with another one. Can create false positives */ | |
758 | /* We assume that cl is not inverted */ | |
759 | STATIC void | |
5f66b61c | 760 | S_cl_and(struct regnode_charclass_class *cl, |
a28509cc | 761 | const struct regnode_charclass_class *and_with) |
653099ff | 762 | { |
7918f24d | 763 | PERL_ARGS_ASSERT_CL_AND; |
40d049e4 YO |
764 | |
765 | assert(and_with->type == ANYOF); | |
653099ff GS |
766 | if (!(and_with->flags & ANYOF_CLASS) |
767 | && !(cl->flags & ANYOF_CLASS) | |
768 | && (and_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE) | |
769 | && !(and_with->flags & ANYOF_FOLD) | |
770 | && !(cl->flags & ANYOF_FOLD)) { | |
771 | int i; | |
772 | ||
773 | if (and_with->flags & ANYOF_INVERT) | |
774 | for (i = 0; i < ANYOF_BITMAP_SIZE; i++) | |
775 | cl->bitmap[i] &= ~and_with->bitmap[i]; | |
776 | else | |
777 | for (i = 0; i < ANYOF_BITMAP_SIZE; i++) | |
778 | cl->bitmap[i] &= and_with->bitmap[i]; | |
779 | } /* XXXX: logic is complicated otherwise, leave it along for a moment. */ | |
780 | if (!(and_with->flags & ANYOF_EOS)) | |
781 | cl->flags &= ~ANYOF_EOS; | |
1aa99e6b | 782 | |
8951c461 KW |
783 | if (!(and_with->flags & ANYOF_FOLD)) |
784 | cl->flags &= ~ANYOF_FOLD; | |
785 | ||
3ff7ceb3 | 786 | if (cl->flags & ANYOF_UNICODE_ALL && and_with->flags & ANYOF_NONBITMAP && |
14ebb1a2 | 787 | !(and_with->flags & ANYOF_INVERT)) { |
1aa99e6b | 788 | cl->flags &= ~ANYOF_UNICODE_ALL; |
ef87b810 KW |
789 | cl->flags |= and_with->flags & ANYOF_NONBITMAP; /* field is 2 bits; use |
790 | only the one(s) | |
791 | actually set */ | |
1aa99e6b IH |
792 | ARG_SET(cl, ARG(and_with)); |
793 | } | |
14ebb1a2 JH |
794 | if (!(and_with->flags & ANYOF_UNICODE_ALL) && |
795 | !(and_with->flags & ANYOF_INVERT)) | |
1aa99e6b | 796 | cl->flags &= ~ANYOF_UNICODE_ALL; |
3ff7ceb3 | 797 | if (!(and_with->flags & (ANYOF_NONBITMAP|ANYOF_UNICODE_ALL)) && |
14ebb1a2 | 798 | !(and_with->flags & ANYOF_INVERT)) |
3ff7ceb3 | 799 | cl->flags &= ~ANYOF_NONBITMAP; |
653099ff GS |
800 | } |
801 | ||
802 | /* 'OR' a given class with another one. Can create false positives */ | |
803 | /* We assume that cl is not inverted */ | |
804 | STATIC void | |
097eb12c | 805 | S_cl_or(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl, const struct regnode_charclass_class *or_with) |
653099ff | 806 | { |
7918f24d NC |
807 | PERL_ARGS_ASSERT_CL_OR; |
808 | ||
653099ff GS |
809 | if (or_with->flags & ANYOF_INVERT) { |
810 | /* We do not use | |
811 | * (B1 | CL1) | (!B2 & !CL2) = (B1 | !B2 & !CL2) | (CL1 | (!B2 & !CL2)) | |
812 | * <= (B1 | !B2) | (CL1 | !CL2) | |
813 | * which is wasteful if CL2 is small, but we ignore CL2: | |
814 | * (B1 | CL1) | (!B2 & !CL2) <= (B1 | CL1) | !B2 = (B1 | !B2) | CL1 | |
815 | * XXXX Can we handle case-fold? Unclear: | |
816 | * (OK1(i) | OK1(i')) | !(OK1(i) | OK1(i')) = | |
817 | * (OK1(i) | OK1(i')) | (!OK1(i) & !OK1(i')) | |
818 | */ | |
819 | if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE) | |
820 | && !(or_with->flags & ANYOF_FOLD) | |
821 | && !(cl->flags & ANYOF_FOLD) ) { | |
822 | int i; | |
823 | ||
824 | for (i = 0; i < ANYOF_BITMAP_SIZE; i++) | |
825 | cl->bitmap[i] |= ~or_with->bitmap[i]; | |
826 | } /* XXXX: logic is complicated otherwise */ | |
827 | else { | |
830247a4 | 828 | cl_anything(pRExC_state, cl); |
653099ff GS |
829 | } |
830 | } else { | |
831 | /* (B1 | CL1) | (B2 | CL2) = (B1 | B2) | (CL1 | CL2)) */ | |
832 | if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE) | |
b81d288d | 833 | && (!(or_with->flags & ANYOF_FOLD) |
653099ff GS |
834 | || (cl->flags & ANYOF_FOLD)) ) { |
835 | int i; | |
836 | ||
837 | /* OR char bitmap and class bitmap separately */ | |
838 | for (i = 0; i < ANYOF_BITMAP_SIZE; i++) | |
839 | cl->bitmap[i] |= or_with->bitmap[i]; | |
840 | if (or_with->flags & ANYOF_CLASS) { | |
841 | for (i = 0; i < ANYOF_CLASSBITMAP_SIZE; i++) | |
842 | cl->classflags[i] |= or_with->classflags[i]; | |
843 | cl->flags |= ANYOF_CLASS; | |
844 | } | |
845 | } | |
846 | else { /* XXXX: logic is complicated, leave it along for a moment. */ | |
830247a4 | 847 | cl_anything(pRExC_state, cl); |
653099ff GS |
848 | } |
849 | } | |
850 | if (or_with->flags & ANYOF_EOS) | |
851 | cl->flags |= ANYOF_EOS; | |
1aa99e6b | 852 | |
8951c461 KW |
853 | if (or_with->flags & ANYOF_FOLD) |
854 | cl->flags |= ANYOF_FOLD; | |
855 | ||
9826f543 KW |
856 | /* If both nodes match something outside the bitmap, but what they match |
857 | * outside is not the same pointer, and hence not easily compared, give up | |
858 | * and allow the start class to match everything outside the bitmap */ | |
3ff7ceb3 | 859 | if (cl->flags & ANYOF_NONBITMAP && or_with->flags & ANYOF_NONBITMAP && |
1aa99e6b IH |
860 | ARG(cl) != ARG(or_with)) { |
861 | cl->flags |= ANYOF_UNICODE_ALL; | |
1aa99e6b | 862 | } |
9826f543 | 863 | |
1aa99e6b IH |
864 | if (or_with->flags & ANYOF_UNICODE_ALL) { |
865 | cl->flags |= ANYOF_UNICODE_ALL; | |
1aa99e6b | 866 | } |
653099ff GS |
867 | } |
868 | ||
a3621e74 YO |
869 | #define TRIE_LIST_ITEM(state,idx) (trie->states[state].trans.list)[ idx ] |
870 | #define TRIE_LIST_CUR(state) ( TRIE_LIST_ITEM( state, 0 ).forid ) | |
871 | #define TRIE_LIST_LEN(state) ( TRIE_LIST_ITEM( state, 0 ).newstate ) | |
872 | #define TRIE_LIST_USED(idx) ( trie->states[state].trans.list ? (TRIE_LIST_CUR( idx ) - 1) : 0 ) | |
873 | ||
3dab1dad YO |
874 | |
875 | #ifdef DEBUGGING | |
07be1b83 | 876 | /* |
2b8b4781 NC |
877 | dump_trie(trie,widecharmap,revcharmap) |
878 | dump_trie_interim_list(trie,widecharmap,revcharmap,next_alloc) | |
879 | dump_trie_interim_table(trie,widecharmap,revcharmap,next_alloc) | |
3dab1dad YO |
880 | |
881 | These routines dump out a trie in a somewhat readable format. | |
07be1b83 YO |
882 | The _interim_ variants are used for debugging the interim |
883 | tables that are used to generate the final compressed | |
884 | representation which is what dump_trie expects. | |
885 | ||
3dab1dad YO |
886 | Part of the reason for their existance is to provide a form |
887 | of documentation as to how the different representations function. | |
07be1b83 YO |
888 | |
889 | */ | |
3dab1dad YO |
890 | |
891 | /* | |
3dab1dad YO |
892 | Dumps the final compressed table form of the trie to Perl_debug_log. |
893 | Used for debugging make_trie(). | |
894 | */ | |
b9a59e08 | 895 | |
3dab1dad | 896 | STATIC void |
2b8b4781 NC |
897 | S_dump_trie(pTHX_ const struct _reg_trie_data *trie, HV *widecharmap, |
898 | AV *revcharmap, U32 depth) | |
3dab1dad YO |
899 | { |
900 | U32 state; | |
ab3bbdeb | 901 | SV *sv=sv_newmortal(); |
55eed653 | 902 | int colwidth= widecharmap ? 6 : 4; |
2e64971a | 903 | U16 word; |
3dab1dad YO |
904 | GET_RE_DEBUG_FLAGS_DECL; |
905 | ||
7918f24d | 906 | PERL_ARGS_ASSERT_DUMP_TRIE; |
ab3bbdeb | 907 | |
3dab1dad YO |
908 | PerlIO_printf( Perl_debug_log, "%*sChar : %-6s%-6s%-4s ", |
909 | (int)depth * 2 + 2,"", | |
910 | "Match","Base","Ofs" ); | |
911 | ||
912 | for( state = 0 ; state < trie->uniquecharcount ; state++ ) { | |
2b8b4781 | 913 | SV ** const tmp = av_fetch( revcharmap, state, 0); |
3dab1dad | 914 | if ( tmp ) { |
ab3bbdeb YO |
915 | PerlIO_printf( Perl_debug_log, "%*s", |
916 | colwidth, | |
ddc5bc0f | 917 | pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth, |
ab3bbdeb YO |
918 | PL_colors[0], PL_colors[1], |
919 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) | | |
920 | PERL_PV_ESCAPE_FIRSTCHAR | |
921 | ) | |
922 | ); | |
3dab1dad YO |
923 | } |
924 | } | |
925 | PerlIO_printf( Perl_debug_log, "\n%*sState|-----------------------", | |
926 | (int)depth * 2 + 2,""); | |
927 | ||
928 | for( state = 0 ; state < trie->uniquecharcount ; state++ ) | |
ab3bbdeb | 929 | PerlIO_printf( Perl_debug_log, "%.*s", colwidth, "--------"); |
3dab1dad YO |
930 | PerlIO_printf( Perl_debug_log, "\n"); |
931 | ||
1e2e3d02 | 932 | for( state = 1 ; state < trie->statecount ; state++ ) { |
be8e71aa | 933 | const U32 base = trie->states[ state ].trans.base; |
3dab1dad YO |
934 | |
935 | PerlIO_printf( Perl_debug_log, "%*s#%4"UVXf"|", (int)depth * 2 + 2,"", (UV)state); | |
936 | ||
937 | if ( trie->states[ state ].wordnum ) { | |
938 | PerlIO_printf( Perl_debug_log, " W%4X", trie->states[ state ].wordnum ); | |
939 | } else { | |
940 | PerlIO_printf( Perl_debug_log, "%6s", "" ); | |
941 | } | |
942 | ||
943 | PerlIO_printf( Perl_debug_log, " @%4"UVXf" ", (UV)base ); | |
944 | ||
945 | if ( base ) { | |
946 | U32 ofs = 0; | |
947 | ||
948 | while( ( base + ofs < trie->uniquecharcount ) || | |
949 | ( base + ofs - trie->uniquecharcount < trie->lasttrans | |
950 | && trie->trans[ base + ofs - trie->uniquecharcount ].check != state)) | |
951 | ofs++; | |
952 | ||
953 | PerlIO_printf( Perl_debug_log, "+%2"UVXf"[ ", (UV)ofs); | |
954 | ||
955 | for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) { | |
956 | if ( ( base + ofs >= trie->uniquecharcount ) && | |
957 | ( base + ofs - trie->uniquecharcount < trie->lasttrans ) && | |
958 | trie->trans[ base + ofs - trie->uniquecharcount ].check == state ) | |
959 | { | |
ab3bbdeb YO |
960 | PerlIO_printf( Perl_debug_log, "%*"UVXf, |
961 | colwidth, | |
3dab1dad YO |
962 | (UV)trie->trans[ base + ofs - trie->uniquecharcount ].next ); |
963 | } else { | |
ab3bbdeb | 964 | PerlIO_printf( Perl_debug_log, "%*s",colwidth," ." ); |
3dab1dad YO |
965 | } |
966 | } | |
967 | ||
968 | PerlIO_printf( Perl_debug_log, "]"); | |
969 | ||
970 | } | |
971 | PerlIO_printf( Perl_debug_log, "\n" ); | |
972 | } | |
2e64971a DM |
973 | PerlIO_printf(Perl_debug_log, "%*sword_info N:(prev,len)=", (int)depth*2, ""); |
974 | for (word=1; word <= trie->wordcount; word++) { | |
975 | PerlIO_printf(Perl_debug_log, " %d:(%d,%d)", | |
976 | (int)word, (int)(trie->wordinfo[word].prev), | |
977 | (int)(trie->wordinfo[word].len)); | |
978 | } | |
979 | PerlIO_printf(Perl_debug_log, "\n" ); | |
3dab1dad YO |
980 | } |
981 | /* | |
3dab1dad YO |
982 | Dumps a fully constructed but uncompressed trie in list form. |
983 | List tries normally only are used for construction when the number of | |
984 | possible chars (trie->uniquecharcount) is very high. | |
985 | Used for debugging make_trie(). | |
986 | */ | |
987 | STATIC void | |
55eed653 | 988 | S_dump_trie_interim_list(pTHX_ const struct _reg_trie_data *trie, |
2b8b4781 NC |
989 | HV *widecharmap, AV *revcharmap, U32 next_alloc, |
990 | U32 depth) | |
3dab1dad YO |
991 | { |
992 | U32 state; | |
ab3bbdeb | 993 | SV *sv=sv_newmortal(); |
55eed653 | 994 | int colwidth= widecharmap ? 6 : 4; |
3dab1dad | 995 | GET_RE_DEBUG_FLAGS_DECL; |
7918f24d NC |
996 | |
997 | PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_LIST; | |
998 | ||
3dab1dad | 999 | /* print out the table precompression. */ |
ab3bbdeb YO |
1000 | PerlIO_printf( Perl_debug_log, "%*sState :Word | Transition Data\n%*s%s", |
1001 | (int)depth * 2 + 2,"", (int)depth * 2 + 2,"", | |
1002 | "------:-----+-----------------\n" ); | |
3dab1dad YO |
1003 | |
1004 | for( state=1 ; state < next_alloc ; state ++ ) { | |
1005 | U16 charid; | |
1006 | ||
ab3bbdeb | 1007 | PerlIO_printf( Perl_debug_log, "%*s %4"UVXf" :", |
3dab1dad YO |
1008 | (int)depth * 2 + 2,"", (UV)state ); |
1009 | if ( ! trie->states[ state ].wordnum ) { | |
1010 | PerlIO_printf( Perl_debug_log, "%5s| ",""); | |
1011 | } else { | |
1012 | PerlIO_printf( Perl_debug_log, "W%4x| ", | |
1013 | trie->states[ state ].wordnum | |
1014 | ); | |
1015 | } | |
1016 | for( charid = 1 ; charid <= TRIE_LIST_USED( state ) ; charid++ ) { | |
2b8b4781 | 1017 | SV ** const tmp = av_fetch( revcharmap, TRIE_LIST_ITEM(state,charid).forid, 0); |
ab3bbdeb YO |
1018 | if ( tmp ) { |
1019 | PerlIO_printf( Perl_debug_log, "%*s:%3X=%4"UVXf" | ", | |
1020 | colwidth, | |
ddc5bc0f | 1021 | pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth, |
ab3bbdeb YO |
1022 | PL_colors[0], PL_colors[1], |
1023 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) | | |
1024 | PERL_PV_ESCAPE_FIRSTCHAR | |
1025 | ) , | |
1e2e3d02 YO |
1026 | TRIE_LIST_ITEM(state,charid).forid, |
1027 | (UV)TRIE_LIST_ITEM(state,charid).newstate | |
1028 | ); | |
1029 | if (!(charid % 10)) | |
664e119d RGS |
1030 | PerlIO_printf(Perl_debug_log, "\n%*s| ", |
1031 | (int)((depth * 2) + 14), ""); | |
1e2e3d02 | 1032 | } |
ab3bbdeb YO |
1033 | } |
1034 | PerlIO_printf( Perl_debug_log, "\n"); | |
3dab1dad YO |
1035 | } |
1036 | } | |
1037 | ||
1038 | /* | |
3dab1dad YO |
1039 | Dumps a fully constructed but uncompressed trie in table form. |
1040 | This is the normal DFA style state transition table, with a few | |
1041 | twists to facilitate compression later. | |
1042 | Used for debugging make_trie(). | |
1043 | */ | |
1044 | STATIC void | |
55eed653 | 1045 | S_dump_trie_interim_table(pTHX_ const struct _reg_trie_data *trie, |
2b8b4781 NC |
1046 | HV *widecharmap, AV *revcharmap, U32 next_alloc, |
1047 | U32 depth) | |
3dab1dad YO |
1048 | { |
1049 | U32 state; | |
1050 | U16 charid; | |
ab3bbdeb | 1051 | SV *sv=sv_newmortal(); |
55eed653 | 1052 | int colwidth= widecharmap ? 6 : 4; |
3dab1dad | 1053 | GET_RE_DEBUG_FLAGS_DECL; |
7918f24d NC |
1054 | |
1055 | PERL_ARGS_ASSERT_DUMP_TRIE_INTERIM_TABLE; | |
3dab1dad YO |
1056 | |
1057 | /* | |
1058 | print out the table precompression so that we can do a visual check | |
1059 | that they are identical. | |
1060 | */ | |
1061 | ||
1062 | PerlIO_printf( Perl_debug_log, "%*sChar : ",(int)depth * 2 + 2,"" ); | |
1063 | ||
1064 | for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) { | |
2b8b4781 | 1065 | SV ** const tmp = av_fetch( revcharmap, charid, 0); |
3dab1dad | 1066 | if ( tmp ) { |
ab3bbdeb YO |
1067 | PerlIO_printf( Perl_debug_log, "%*s", |
1068 | colwidth, | |
ddc5bc0f | 1069 | pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth, |
ab3bbdeb YO |
1070 | PL_colors[0], PL_colors[1], |
1071 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) | | |
1072 | PERL_PV_ESCAPE_FIRSTCHAR | |
1073 | ) | |
1074 | ); | |
3dab1dad YO |
1075 | } |
1076 | } | |
1077 | ||
1078 | PerlIO_printf( Perl_debug_log, "\n%*sState+-",(int)depth * 2 + 2,"" ); | |
1079 | ||
1080 | for( charid=0 ; charid < trie->uniquecharcount ; charid++ ) { | |
ab3bbdeb | 1081 | PerlIO_printf( Perl_debug_log, "%.*s", colwidth,"--------"); |
3dab1dad YO |
1082 | } |
1083 | ||
1084 | PerlIO_printf( Perl_debug_log, "\n" ); | |
1085 | ||
1086 | for( state=1 ; state < next_alloc ; state += trie->uniquecharcount ) { | |
1087 | ||
1088 | PerlIO_printf( Perl_debug_log, "%*s%4"UVXf" : ", | |
1089 | (int)depth * 2 + 2,"", | |
1090 | (UV)TRIE_NODENUM( state ) ); | |
1091 | ||
1092 | for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) { | |
ab3bbdeb YO |
1093 | UV v=(UV)SAFE_TRIE_NODENUM( trie->trans[ state + charid ].next ); |
1094 | if (v) | |
1095 | PerlIO_printf( Perl_debug_log, "%*"UVXf, colwidth, v ); | |
1096 | else | |
1097 | PerlIO_printf( Perl_debug_log, "%*s", colwidth, "." ); | |
3dab1dad YO |
1098 | } |
1099 | if ( ! trie->states[ TRIE_NODENUM( state ) ].wordnum ) { | |
1100 | PerlIO_printf( Perl_debug_log, " (%4"UVXf")\n", (UV)trie->trans[ state ].check ); | |
1101 | } else { | |
1102 | PerlIO_printf( Perl_debug_log, " (%4"UVXf") W%4X\n", (UV)trie->trans[ state ].check, | |
1103 | trie->states[ TRIE_NODENUM( state ) ].wordnum ); | |
1104 | } | |
1105 | } | |
07be1b83 | 1106 | } |
3dab1dad YO |
1107 | |
1108 | #endif | |
1109 | ||
2e64971a | 1110 | |
786e8c11 YO |
1111 | /* make_trie(startbranch,first,last,tail,word_count,flags,depth) |
1112 | startbranch: the first branch in the whole branch sequence | |
1113 | first : start branch of sequence of branch-exact nodes. | |
1114 | May be the same as startbranch | |
1115 | last : Thing following the last branch. | |
1116 | May be the same as tail. | |
1117 | tail : item following the branch sequence | |
1118 | count : words in the sequence | |
1119 | flags : currently the OP() type we will be building one of /EXACT(|F|Fl)/ | |
1120 | depth : indent depth | |
3dab1dad | 1121 | |
786e8c11 | 1122 | Inplace optimizes a sequence of 2 or more Branch-Exact nodes into a TRIE node. |
07be1b83 | 1123 | |
786e8c11 YO |
1124 | A trie is an N'ary tree where the branches are determined by digital |
1125 | decomposition of the key. IE, at the root node you look up the 1st character and | |
1126 | follow that branch repeat until you find the end of the branches. Nodes can be | |
1127 | marked as "accepting" meaning they represent a complete word. Eg: | |
07be1b83 | 1128 | |
786e8c11 | 1129 | /he|she|his|hers/ |
72f13be8 | 1130 | |
786e8c11 YO |
1131 | would convert into the following structure. Numbers represent states, letters |
1132 | following numbers represent valid transitions on the letter from that state, if | |
1133 | the number is in square brackets it represents an accepting state, otherwise it | |
1134 | will be in parenthesis. | |
07be1b83 | 1135 | |
786e8c11 YO |
1136 | +-h->+-e->[3]-+-r->(8)-+-s->[9] |
1137 | | | | |
1138 | | (2) | |
1139 | | | | |
1140 | (1) +-i->(6)-+-s->[7] | |
1141 | | | |
1142 | +-s->(3)-+-h->(4)-+-e->[5] | |
07be1b83 | 1143 | |
786e8c11 YO |
1144 | Accept Word Mapping: 3=>1 (he),5=>2 (she), 7=>3 (his), 9=>4 (hers) |
1145 | ||
1146 | This shows that when matching against the string 'hers' we will begin at state 1 | |
1147 | read 'h' and move to state 2, read 'e' and move to state 3 which is accepting, | |
1148 | then read 'r' and go to state 8 followed by 's' which takes us to state 9 which | |
1149 | is also accepting. Thus we know that we can match both 'he' and 'hers' with a | |
1150 | single traverse. We store a mapping from accepting to state to which word was | |
1151 | matched, and then when we have multiple possibilities we try to complete the | |
1152 | rest of the regex in the order in which they occured in the alternation. | |
1153 | ||
1154 | The only prior NFA like behaviour that would be changed by the TRIE support is | |
1155 | the silent ignoring of duplicate alternations which are of the form: | |
1156 | ||
1157 | / (DUPE|DUPE) X? (?{ ... }) Y /x | |
1158 | ||
1159 | Thus EVAL blocks follwing a trie may be called a different number of times with | |
1160 | and without the optimisation. With the optimisations dupes will be silently | |
1161 | ignored. This inconsistant behaviour of EVAL type nodes is well established as | |
1162 | the following demonstrates: | |
1163 | ||
1164 | 'words'=~/(word|word|word)(?{ print $1 })[xyz]/ | |
1165 | ||
1166 | which prints out 'word' three times, but | |
1167 | ||
1168 | 'words'=~/(word|word|word)(?{ print $1 })S/ | |
1169 | ||
1170 | which doesnt print it out at all. This is due to other optimisations kicking in. | |
1171 | ||
1172 | Example of what happens on a structural level: | |
1173 | ||
1174 | The regexp /(ac|ad|ab)+/ will produce the folowing debug output: | |
1175 | ||
1176 | 1: CURLYM[1] {1,32767}(18) | |
1177 | 5: BRANCH(8) | |
1178 | 6: EXACT <ac>(16) | |
1179 | 8: BRANCH(11) | |
1180 | 9: EXACT <ad>(16) | |
1181 | 11: BRANCH(14) | |
1182 | 12: EXACT <ab>(16) | |
1183 | 16: SUCCEED(0) | |
1184 | 17: NOTHING(18) | |
1185 | 18: END(0) | |
1186 | ||
1187 | This would be optimizable with startbranch=5, first=5, last=16, tail=16 | |
1188 | and should turn into: | |
1189 | ||
1190 | 1: CURLYM[1] {1,32767}(18) | |
1191 | 5: TRIE(16) | |
1192 | [Words:3 Chars Stored:6 Unique Chars:4 States:5 NCP:1] | |
1193 | <ac> | |
1194 | <ad> | |
1195 | <ab> | |
1196 | 16: SUCCEED(0) | |
1197 | 17: NOTHING(18) | |
1198 | 18: END(0) | |
1199 | ||
1200 | Cases where tail != last would be like /(?foo|bar)baz/: | |
1201 | ||
1202 | 1: BRANCH(4) | |
1203 | 2: EXACT <foo>(8) | |
1204 | 4: BRANCH(7) | |
1205 | 5: EXACT <bar>(8) | |
1206 | 7: TAIL(8) | |
1207 | 8: EXACT <baz>(10) | |
1208 | 10: END(0) | |
1209 | ||
1210 | which would be optimizable with startbranch=1, first=1, last=7, tail=8 | |
1211 | and would end up looking like: | |
1212 | ||
1213 | 1: TRIE(8) | |
1214 | [Words:2 Chars Stored:6 Unique Chars:5 States:7 NCP:1] | |
1215 | <foo> | |
1216 | <bar> | |
1217 | 7: TAIL(8) | |
1218 | 8: EXACT <baz>(10) | |
1219 | 10: END(0) | |
1220 | ||
1221 | d = uvuni_to_utf8_flags(d, uv, 0); | |
1222 | ||
1223 | is the recommended Unicode-aware way of saying | |
1224 | ||
1225 | *(d++) = uv; | |
1226 | */ | |
1227 | ||
1e2e3d02 | 1228 | #define TRIE_STORE_REVCHAR \ |
786e8c11 | 1229 | STMT_START { \ |
73031816 NC |
1230 | if (UTF) { \ |
1231 | SV *zlopp = newSV(2); \ | |
88c9ea1e CB |
1232 | unsigned char *flrbbbbb = (unsigned char *) SvPVX(zlopp); \ |
1233 | unsigned const char *const kapow = uvuni_to_utf8(flrbbbbb, uvc & 0xFF); \ | |
73031816 NC |
1234 | SvCUR_set(zlopp, kapow - flrbbbbb); \ |
1235 | SvPOK_on(zlopp); \ | |
1236 | SvUTF8_on(zlopp); \ | |
1237 | av_push(revcharmap, zlopp); \ | |
1238 | } else { \ | |
6bdeddd2 | 1239 | char ooooff = (char)uvc; \ |
73031816 NC |
1240 | av_push(revcharmap, newSVpvn(&ooooff, 1)); \ |
1241 | } \ | |
1242 | } STMT_END | |
786e8c11 YO |
1243 | |
1244 | #define TRIE_READ_CHAR STMT_START { \ | |
1245 | wordlen++; \ | |
1246 | if ( UTF ) { \ | |
1247 | if ( folder ) { \ | |
1248 | if ( foldlen > 0 ) { \ | |
1249 | uvc = utf8n_to_uvuni( scan, UTF8_MAXLEN, &len, uniflags ); \ | |
1250 | foldlen -= len; \ | |
1251 | scan += len; \ | |
1252 | len = 0; \ | |
1253 | } else { \ | |
1254 | uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\ | |
1255 | uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \ | |
1256 | foldlen -= UNISKIP( uvc ); \ | |
1257 | scan = foldbuf + UNISKIP( uvc ); \ | |
1258 | } \ | |
1259 | } else { \ | |
1260 | uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\ | |
1261 | } \ | |
1262 | } else { \ | |
1263 | uvc = (U32)*uc; \ | |
1264 | len = 1; \ | |
1265 | } \ | |
1266 | } STMT_END | |
1267 | ||
1268 | ||
1269 | ||
1270 | #define TRIE_LIST_PUSH(state,fid,ns) STMT_START { \ | |
1271 | if ( TRIE_LIST_CUR( state ) >=TRIE_LIST_LEN( state ) ) { \ | |
f9003953 NC |
1272 | U32 ging = TRIE_LIST_LEN( state ) *= 2; \ |
1273 | Renew( trie->states[ state ].trans.list, ging, reg_trie_trans_le ); \ | |
786e8c11 YO |
1274 | } \ |
1275 | TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).forid = fid; \ | |
1276 | TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).newstate = ns; \ | |
1277 | TRIE_LIST_CUR( state )++; \ | |
1278 | } STMT_END | |
07be1b83 | 1279 | |
786e8c11 YO |
1280 | #define TRIE_LIST_NEW(state) STMT_START { \ |
1281 | Newxz( trie->states[ state ].trans.list, \ | |
1282 | 4, reg_trie_trans_le ); \ | |
1283 | TRIE_LIST_CUR( state ) = 1; \ | |
1284 | TRIE_LIST_LEN( state ) = 4; \ | |
1285 | } STMT_END | |
07be1b83 | 1286 | |
786e8c11 YO |
1287 | #define TRIE_HANDLE_WORD(state) STMT_START { \ |
1288 | U16 dupe= trie->states[ state ].wordnum; \ | |
1289 | regnode * const noper_next = regnext( noper ); \ | |
1290 | \ | |
786e8c11 YO |
1291 | DEBUG_r({ \ |
1292 | /* store the word for dumping */ \ | |
1293 | SV* tmp; \ | |
1294 | if (OP(noper) != NOTHING) \ | |
740cce10 | 1295 | tmp = newSVpvn_utf8(STRING(noper), STR_LEN(noper), UTF); \ |
786e8c11 | 1296 | else \ |
740cce10 | 1297 | tmp = newSVpvn_utf8( "", 0, UTF ); \ |
2b8b4781 | 1298 | av_push( trie_words, tmp ); \ |
786e8c11 YO |
1299 | }); \ |
1300 | \ | |
1301 | curword++; \ | |
2e64971a DM |
1302 | trie->wordinfo[curword].prev = 0; \ |
1303 | trie->wordinfo[curword].len = wordlen; \ | |
1304 | trie->wordinfo[curword].accept = state; \ | |
786e8c11 YO |
1305 | \ |
1306 | if ( noper_next < tail ) { \ | |
1307 | if (!trie->jump) \ | |
c944940b | 1308 | trie->jump = (U16 *) PerlMemShared_calloc( word_count + 1, sizeof(U16) ); \ |
7f69552c | 1309 | trie->jump[curword] = (U16)(noper_next - convert); \ |
786e8c11 YO |
1310 | if (!jumper) \ |
1311 | jumper = noper_next; \ | |
1312 | if (!nextbranch) \ | |
1313 | nextbranch= regnext(cur); \ | |
1314 | } \ | |
1315 | \ | |
1316 | if ( dupe ) { \ | |
2e64971a DM |
1317 | /* It's a dupe. Pre-insert into the wordinfo[].prev */\ |
1318 | /* chain, so that when the bits of chain are later */\ | |
1319 | /* linked together, the dups appear in the chain */\ | |
1320 | trie->wordinfo[curword].prev = trie->wordinfo[dupe].prev; \ | |
1321 | trie->wordinfo[dupe].prev = curword; \ | |
786e8c11 YO |
1322 | } else { \ |
1323 | /* we haven't inserted this word yet. */ \ | |
1324 | trie->states[ state ].wordnum = curword; \ | |
1325 | } \ | |
1326 | } STMT_END | |
07be1b83 | 1327 | |
3dab1dad | 1328 | |
786e8c11 YO |
1329 | #define TRIE_TRANS_STATE(state,base,ucharcount,charid,special) \ |
1330 | ( ( base + charid >= ucharcount \ | |
1331 | && base + charid < ubound \ | |
1332 | && state == trie->trans[ base - ucharcount + charid ].check \ | |
1333 | && trie->trans[ base - ucharcount + charid ].next ) \ | |
1334 | ? trie->trans[ base - ucharcount + charid ].next \ | |
1335 | : ( state==1 ? special : 0 ) \ | |
1336 | ) | |
3dab1dad | 1337 | |
786e8c11 YO |
1338 | #define MADE_TRIE 1 |
1339 | #define MADE_JUMP_TRIE 2 | |
1340 | #define MADE_EXACT_TRIE 4 | |
3dab1dad | 1341 | |
a3621e74 | 1342 | STATIC I32 |
786e8c11 | 1343 | S_make_trie(pTHX_ RExC_state_t *pRExC_state, regnode *startbranch, regnode *first, regnode *last, regnode *tail, U32 word_count, U32 flags, U32 depth) |
a3621e74 | 1344 | { |
27da23d5 | 1345 | dVAR; |
a3621e74 YO |
1346 | /* first pass, loop through and scan words */ |
1347 | reg_trie_data *trie; | |
55eed653 | 1348 | HV *widecharmap = NULL; |
2b8b4781 | 1349 | AV *revcharmap = newAV(); |
a3621e74 | 1350 | regnode *cur; |
9f7f3913 | 1351 | const U32 uniflags = UTF8_ALLOW_DEFAULT; |
a3621e74 YO |
1352 | STRLEN len = 0; |
1353 | UV uvc = 0; | |
1354 | U16 curword = 0; | |
1355 | U32 next_alloc = 0; | |
786e8c11 YO |
1356 | regnode *jumper = NULL; |
1357 | regnode *nextbranch = NULL; | |
7f69552c | 1358 | regnode *convert = NULL; |
2e64971a | 1359 | U32 *prev_states; /* temp array mapping each state to previous one */ |
a3621e74 | 1360 | /* we just use folder as a flag in utf8 */ |
e1ec3a88 | 1361 | const U8 * const folder = ( flags == EXACTF |
a3621e74 YO |
1362 | ? PL_fold |
1363 | : ( flags == EXACTFL | |
1364 | ? PL_fold_locale | |
1365 | : NULL | |
1366 | ) | |
1367 | ); | |
1368 | ||
2b8b4781 NC |
1369 | #ifdef DEBUGGING |
1370 | const U32 data_slot = add_data( pRExC_state, 4, "tuuu" ); | |
1371 | AV *trie_words = NULL; | |
1372 | /* along with revcharmap, this only used during construction but both are | |
1373 | * useful during debugging so we store them in the struct when debugging. | |
8e11feef | 1374 | */ |
2b8b4781 NC |
1375 | #else |
1376 | const U32 data_slot = add_data( pRExC_state, 2, "tu" ); | |
3dab1dad | 1377 | STRLEN trie_charcount=0; |
3dab1dad | 1378 | #endif |
2b8b4781 | 1379 | SV *re_trie_maxbuff; |
a3621e74 | 1380 | GET_RE_DEBUG_FLAGS_DECL; |
7918f24d NC |
1381 | |
1382 | PERL_ARGS_ASSERT_MAKE_TRIE; | |
72f13be8 YO |
1383 | #ifndef DEBUGGING |
1384 | PERL_UNUSED_ARG(depth); | |
1385 | #endif | |
a3621e74 | 1386 | |
c944940b | 1387 | trie = (reg_trie_data *) PerlMemShared_calloc( 1, sizeof(reg_trie_data) ); |
a3621e74 | 1388 | trie->refcount = 1; |
3dab1dad | 1389 | trie->startstate = 1; |
786e8c11 | 1390 | trie->wordcount = word_count; |
f8fc2ecf | 1391 | RExC_rxi->data->data[ data_slot ] = (void*)trie; |
c944940b | 1392 | trie->charmap = (U16 *) PerlMemShared_calloc( 256, sizeof(U16) ); |
3dab1dad | 1393 | if (!(UTF && folder)) |
c944940b | 1394 | trie->bitmap = (char *) PerlMemShared_calloc( ANYOF_BITMAP_SIZE, 1 ); |
2e64971a DM |
1395 | trie->wordinfo = (reg_trie_wordinfo *) PerlMemShared_calloc( |
1396 | trie->wordcount+1, sizeof(reg_trie_wordinfo)); | |
1397 | ||
a3621e74 | 1398 | DEBUG_r({ |
2b8b4781 | 1399 | trie_words = newAV(); |
a3621e74 | 1400 | }); |
a3621e74 | 1401 | |
0111c4fd | 1402 | re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1); |
a3621e74 | 1403 | if (!SvIOK(re_trie_maxbuff)) { |
0111c4fd | 1404 | sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT); |
a3621e74 | 1405 | } |
3dab1dad YO |
1406 | DEBUG_OPTIMISE_r({ |
1407 | PerlIO_printf( Perl_debug_log, | |
786e8c11 | 1408 | "%*smake_trie start==%d, first==%d, last==%d, tail==%d depth=%d\n", |
3dab1dad YO |
1409 | (int)depth * 2 + 2, "", |
1410 | REG_NODE_NUM(startbranch),REG_NODE_NUM(first), | |
786e8c11 | 1411 | REG_NODE_NUM(last), REG_NODE_NUM(tail), |
85c3142d | 1412 | (int)depth); |
3dab1dad | 1413 | }); |
7f69552c YO |
1414 | |
1415 | /* Find the node we are going to overwrite */ | |
1416 | if ( first == startbranch && OP( last ) != BRANCH ) { | |
1417 | /* whole branch chain */ | |
1418 | convert = first; | |
1419 | } else { | |
1420 | /* branch sub-chain */ | |
1421 | convert = NEXTOPER( first ); | |
1422 | } | |
1423 | ||
a3621e74 YO |
1424 | /* -- First loop and Setup -- |
1425 | ||
1426 | We first traverse the branches and scan each word to determine if it | |
1427 | contains widechars, and how many unique chars there are, this is | |
1428 | important as we have to build a table with at least as many columns as we | |
1429 | have unique chars. | |
1430 | ||
1431 | We use an array of integers to represent the character codes 0..255 | |
38a44b82 | 1432 | (trie->charmap) and we use a an HV* to store Unicode characters. We use the |
a3621e74 YO |
1433 | native representation of the character value as the key and IV's for the |
1434 | coded index. | |
1435 | ||
1436 | *TODO* If we keep track of how many times each character is used we can | |
1437 | remap the columns so that the table compression later on is more | |
3b753521 | 1438 | efficient in terms of memory by ensuring the most common value is in the |
a3621e74 YO |
1439 | middle and the least common are on the outside. IMO this would be better |
1440 | than a most to least common mapping as theres a decent chance the most | |
1441 | common letter will share a node with the least common, meaning the node | |
1442 | will not be compressable. With a middle is most common approach the worst | |
1443 | case is when we have the least common nodes twice. | |
1444 | ||
1445 | */ | |
1446 | ||
a3621e74 | 1447 | for ( cur = first ; cur < last ; cur = regnext( cur ) ) { |
c445ea15 | 1448 | regnode * const noper = NEXTOPER( cur ); |
e1ec3a88 | 1449 | const U8 *uc = (U8*)STRING( noper ); |
a28509cc | 1450 | const U8 * const e = uc + STR_LEN( noper ); |
a3621e74 YO |
1451 | STRLEN foldlen = 0; |
1452 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; | |
2af232bd | 1453 | const U8 *scan = (U8*)NULL; |
07be1b83 | 1454 | U32 wordlen = 0; /* required init */ |
02daf0ab YO |
1455 | STRLEN chars = 0; |
1456 | bool set_bit = trie->bitmap ? 1 : 0; /*store the first char in the bitmap?*/ | |
a3621e74 | 1457 | |
3dab1dad YO |
1458 | if (OP(noper) == NOTHING) { |
1459 | trie->minlen= 0; | |
1460 | continue; | |
1461 | } | |
02daf0ab YO |
1462 | if ( set_bit ) /* bitmap only alloced when !(UTF&&Folding) */ |
1463 | TRIE_BITMAP_SET(trie,*uc); /* store the raw first byte | |
1464 | regardless of encoding */ | |
1465 | ||
a3621e74 | 1466 | for ( ; uc < e ; uc += len ) { |
3dab1dad | 1467 | TRIE_CHARCOUNT(trie)++; |
a3621e74 | 1468 | TRIE_READ_CHAR; |
3dab1dad | 1469 | chars++; |
a3621e74 YO |
1470 | if ( uvc < 256 ) { |
1471 | if ( !trie->charmap[ uvc ] ) { | |
1472 | trie->charmap[ uvc ]=( ++trie->uniquecharcount ); | |
1473 | if ( folder ) | |
1474 | trie->charmap[ folder[ uvc ] ] = trie->charmap[ uvc ]; | |
3dab1dad | 1475 | TRIE_STORE_REVCHAR; |
a3621e74 | 1476 | } |
02daf0ab YO |
1477 | if ( set_bit ) { |
1478 | /* store the codepoint in the bitmap, and if its ascii | |
1479 | also store its folded equivelent. */ | |
1480 | TRIE_BITMAP_SET(trie,uvc); | |
0921ee73 T |
1481 | |
1482 | /* store the folded codepoint */ | |
1483 | if ( folder ) TRIE_BITMAP_SET(trie,folder[ uvc ]); | |
1484 | ||
1485 | if ( !UTF ) { | |
1486 | /* store first byte of utf8 representation of | |
1487 | codepoints in the 127 < uvc < 256 range */ | |
1488 | if (127 < uvc && uvc < 192) { | |
1489 | TRIE_BITMAP_SET(trie,194); | |
1490 | } else if (191 < uvc ) { | |
1491 | TRIE_BITMAP_SET(trie,195); | |
1492 | /* && uvc < 256 -- we know uvc is < 256 already */ | |
1493 | } | |
1494 | } | |
02daf0ab YO |
1495 | set_bit = 0; /* We've done our bit :-) */ |
1496 | } | |
a3621e74 YO |
1497 | } else { |
1498 | SV** svpp; | |
55eed653 NC |
1499 | if ( !widecharmap ) |
1500 | widecharmap = newHV(); | |
a3621e74 | 1501 | |
55eed653 | 1502 | svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 1 ); |
a3621e74 YO |
1503 | |
1504 | if ( !svpp ) | |
e4584336 | 1505 | Perl_croak( aTHX_ "error creating/fetching widecharmap entry for 0x%"UVXf, uvc ); |
a3621e74 YO |
1506 | |
1507 | if ( !SvTRUE( *svpp ) ) { | |
1508 | sv_setiv( *svpp, ++trie->uniquecharcount ); | |
3dab1dad | 1509 | TRIE_STORE_REVCHAR; |
a3621e74 YO |
1510 | } |
1511 | } | |
1512 | } | |
3dab1dad YO |
1513 | if( cur == first ) { |
1514 | trie->minlen=chars; | |
1515 | trie->maxlen=chars; | |
1516 | } else if (chars < trie->minlen) { | |
1517 | trie->minlen=chars; | |
1518 | } else if (chars > trie->maxlen) { | |
1519 | trie->maxlen=chars; | |
1520 | } | |
1521 | ||
a3621e74 YO |
1522 | } /* end first pass */ |
1523 | DEBUG_TRIE_COMPILE_r( | |
3dab1dad YO |
1524 | PerlIO_printf( Perl_debug_log, "%*sTRIE(%s): W:%d C:%d Uq:%d Min:%d Max:%d\n", |
1525 | (int)depth * 2 + 2,"", | |
55eed653 | 1526 | ( widecharmap ? "UTF8" : "NATIVE" ), (int)word_count, |
be8e71aa YO |
1527 | (int)TRIE_CHARCOUNT(trie), trie->uniquecharcount, |
1528 | (int)trie->minlen, (int)trie->maxlen ) | |
a3621e74 | 1529 | ); |
a3621e74 YO |
1530 | |
1531 | /* | |
1532 | We now know what we are dealing with in terms of unique chars and | |
1533 | string sizes so we can calculate how much memory a naive | |
0111c4fd RGS |
1534 | representation using a flat table will take. If it's over a reasonable |
1535 | limit (as specified by ${^RE_TRIE_MAXBUF}) we use a more memory | |
a3621e74 YO |
1536 | conservative but potentially much slower representation using an array |
1537 | of lists. | |
1538 | ||
1539 | At the end we convert both representations into the same compressed | |
1540 | form that will be used in regexec.c for matching with. The latter | |
1541 | is a form that cannot be used to construct with but has memory | |
1542 | properties similar to the list form and access properties similar | |
1543 | to the table form making it both suitable for fast searches and | |
1544 | small enough that its feasable to store for the duration of a program. | |
1545 | ||
1546 | See the comment in the code where the compressed table is produced | |
1547 | inplace from the flat tabe representation for an explanation of how | |
1548 | the compression works. | |
1549 | ||
1550 | */ | |
1551 | ||
1552 | ||
2e64971a DM |
1553 | Newx(prev_states, TRIE_CHARCOUNT(trie) + 2, U32); |
1554 | prev_states[1] = 0; | |
1555 | ||
3dab1dad | 1556 | if ( (IV)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1) > SvIV(re_trie_maxbuff) ) { |
a3621e74 YO |
1557 | /* |
1558 | Second Pass -- Array Of Lists Representation | |
1559 | ||
1560 | Each state will be represented by a list of charid:state records | |
1561 | (reg_trie_trans_le) the first such element holds the CUR and LEN | |
1562 | points of the allocated array. (See defines above). | |
1563 | ||
1564 | We build the initial structure using the lists, and then convert | |
1565 | it into the compressed table form which allows faster lookups | |
1566 | (but cant be modified once converted). | |
a3621e74 YO |
1567 | */ |
1568 | ||
a3621e74 YO |
1569 | STRLEN transcount = 1; |
1570 | ||
1e2e3d02 YO |
1571 | DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log, |
1572 | "%*sCompiling trie using list compiler\n", | |
1573 | (int)depth * 2 + 2, "")); | |
446bd890 | 1574 | |
c944940b JH |
1575 | trie->states = (reg_trie_state *) |
1576 | PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2, | |
1577 | sizeof(reg_trie_state) ); | |
a3621e74 YO |
1578 | TRIE_LIST_NEW(1); |
1579 | next_alloc = 2; | |
1580 | ||
1581 | for ( cur = first ; cur < last ; cur = regnext( cur ) ) { | |
1582 | ||
c445ea15 AL |
1583 | regnode * const noper = NEXTOPER( cur ); |
1584 | U8 *uc = (U8*)STRING( noper ); | |
1585 | const U8 * const e = uc + STR_LEN( noper ); | |
1586 | U32 state = 1; /* required init */ | |
1587 | U16 charid = 0; /* sanity init */ | |
1588 | U8 *scan = (U8*)NULL; /* sanity init */ | |
1589 | STRLEN foldlen = 0; /* required init */ | |
07be1b83 | 1590 | U32 wordlen = 0; /* required init */ |
c445ea15 AL |
1591 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; |
1592 | ||
3dab1dad | 1593 | if (OP(noper) != NOTHING) { |
786e8c11 | 1594 | for ( ; uc < e ; uc += len ) { |
c445ea15 | 1595 | |
786e8c11 | 1596 | TRIE_READ_CHAR; |
c445ea15 | 1597 | |
786e8c11 YO |
1598 | if ( uvc < 256 ) { |
1599 | charid = trie->charmap[ uvc ]; | |
c445ea15 | 1600 | } else { |
55eed653 | 1601 | SV** const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0); |
786e8c11 YO |
1602 | if ( !svpp ) { |
1603 | charid = 0; | |
1604 | } else { | |
1605 | charid=(U16)SvIV( *svpp ); | |
1606 | } | |
c445ea15 | 1607 | } |
786e8c11 YO |
1608 | /* charid is now 0 if we dont know the char read, or nonzero if we do */ |
1609 | if ( charid ) { | |
a3621e74 | 1610 | |
786e8c11 YO |
1611 | U16 check; |
1612 | U32 newstate = 0; | |
a3621e74 | 1613 | |
786e8c11 YO |
1614 | charid--; |
1615 | if ( !trie->states[ state ].trans.list ) { | |
1616 | TRIE_LIST_NEW( state ); | |
c445ea15 | 1617 | } |
786e8c11 YO |
1618 | for ( check = 1; check <= TRIE_LIST_USED( state ); check++ ) { |
1619 | if ( TRIE_LIST_ITEM( state, check ).forid == charid ) { | |
1620 | newstate = TRIE_LIST_ITEM( state, check ).newstate; | |
1621 | break; | |
1622 | } | |
1623 | } | |
1624 | if ( ! newstate ) { | |
1625 | newstate = next_alloc++; | |
2e64971a | 1626 | prev_states[newstate] = state; |
786e8c11 YO |
1627 | TRIE_LIST_PUSH( state, charid, newstate ); |
1628 | transcount++; | |
1629 | } | |
1630 | state = newstate; | |
1631 | } else { | |
1632 | Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc ); | |
c445ea15 | 1633 | } |
a28509cc | 1634 | } |
c445ea15 | 1635 | } |
3dab1dad | 1636 | TRIE_HANDLE_WORD(state); |
a3621e74 YO |
1637 | |
1638 | } /* end second pass */ | |
1639 | ||
1e2e3d02 YO |
1640 | /* next alloc is the NEXT state to be allocated */ |
1641 | trie->statecount = next_alloc; | |
c944940b JH |
1642 | trie->states = (reg_trie_state *) |
1643 | PerlMemShared_realloc( trie->states, | |
1644 | next_alloc | |
1645 | * sizeof(reg_trie_state) ); | |
a3621e74 | 1646 | |
3dab1dad | 1647 | /* and now dump it out before we compress it */ |
2b8b4781 NC |
1648 | DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_list(trie, widecharmap, |
1649 | revcharmap, next_alloc, | |
1650 | depth+1) | |
1e2e3d02 | 1651 | ); |
a3621e74 | 1652 | |
c944940b JH |
1653 | trie->trans = (reg_trie_trans *) |
1654 | PerlMemShared_calloc( transcount, sizeof(reg_trie_trans) ); | |
a3621e74 YO |
1655 | { |
1656 | U32 state; | |
a3621e74 YO |
1657 | U32 tp = 0; |
1658 | U32 zp = 0; | |
1659 | ||
1660 | ||
1661 | for( state=1 ; state < next_alloc ; state ++ ) { | |
1662 | U32 base=0; | |
1663 | ||
1664 | /* | |
1665 | DEBUG_TRIE_COMPILE_MORE_r( | |
1666 | PerlIO_printf( Perl_debug_log, "tp: %d zp: %d ",tp,zp) | |
1667 | ); | |
1668 | */ | |
1669 | ||
1670 | if (trie->states[state].trans.list) { | |
1671 | U16 minid=TRIE_LIST_ITEM( state, 1).forid; | |
1672 | U16 maxid=minid; | |
a28509cc | 1673 | U16 idx; |
a3621e74 YO |
1674 | |
1675 | for( idx = 2 ; idx <= TRIE_LIST_USED( state ) ; idx++ ) { | |
c445ea15 AL |
1676 | const U16 forid = TRIE_LIST_ITEM( state, idx).forid; |
1677 | if ( forid < minid ) { | |
1678 | minid=forid; | |
1679 | } else if ( forid > maxid ) { | |
1680 | maxid=forid; | |
1681 | } | |
a3621e74 YO |
1682 | } |
1683 | if ( transcount < tp + maxid - minid + 1) { | |
1684 | transcount *= 2; | |
c944940b JH |
1685 | trie->trans = (reg_trie_trans *) |
1686 | PerlMemShared_realloc( trie->trans, | |
446bd890 NC |
1687 | transcount |
1688 | * sizeof(reg_trie_trans) ); | |
a3621e74 YO |
1689 | Zero( trie->trans + (transcount / 2), transcount / 2 , reg_trie_trans ); |
1690 | } | |
1691 | base = trie->uniquecharcount + tp - minid; | |
1692 | if ( maxid == minid ) { | |
1693 | U32 set = 0; | |
1694 | for ( ; zp < tp ; zp++ ) { | |
1695 | if ( ! trie->trans[ zp ].next ) { | |
1696 | base = trie->uniquecharcount + zp - minid; | |
1697 | trie->trans[ zp ].next = TRIE_LIST_ITEM( state, 1).newstate; | |
1698 | trie->trans[ zp ].check = state; | |
1699 | set = 1; | |
1700 | break; | |
1701 | } | |
1702 | } | |
1703 | if ( !set ) { | |
1704 | trie->trans[ tp ].next = TRIE_LIST_ITEM( state, 1).newstate; | |
1705 | trie->trans[ tp ].check = state; | |
1706 | tp++; | |
1707 | zp = tp; | |
1708 | } | |
1709 | } else { | |
1710 | for ( idx=1; idx <= TRIE_LIST_USED( state ) ; idx++ ) { | |
c445ea15 | 1711 | const U32 tid = base - trie->uniquecharcount + TRIE_LIST_ITEM( state, idx ).forid; |
a3621e74 YO |
1712 | trie->trans[ tid ].next = TRIE_LIST_ITEM( state, idx ).newstate; |
1713 | trie->trans[ tid ].check = state; | |
1714 | } | |
1715 | tp += ( maxid - minid + 1 ); | |
1716 | } | |
1717 | Safefree(trie->states[ state ].trans.list); | |
1718 | } | |
1719 | /* | |
1720 | DEBUG_TRIE_COMPILE_MORE_r( | |
1721 | PerlIO_printf( Perl_debug_log, " base: %d\n",base); | |
1722 | ); | |
1723 | */ | |
1724 | trie->states[ state ].trans.base=base; | |
1725 | } | |
cc601c31 | 1726 | trie->lasttrans = tp + 1; |
a3621e74 YO |
1727 | } |
1728 | } else { | |
1729 | /* | |
1730 | Second Pass -- Flat Table Representation. | |
1731 | ||
1732 | we dont use the 0 slot of either trans[] or states[] so we add 1 to each. | |
1733 | We know that we will need Charcount+1 trans at most to store the data | |
1734 | (one row per char at worst case) So we preallocate both structures | |
1735 | assuming worst case. | |
1736 | ||
1737 | We then construct the trie using only the .next slots of the entry | |
1738 | structs. | |
1739 | ||
3b753521 | 1740 | We use the .check field of the first entry of the node temporarily to |
a3621e74 YO |
1741 | make compression both faster and easier by keeping track of how many non |
1742 | zero fields are in the node. | |
1743 | ||
1744 | Since trans are numbered from 1 any 0 pointer in the table is a FAIL | |
1745 | transition. | |
1746 | ||
1747 | There are two terms at use here: state as a TRIE_NODEIDX() which is a | |
1748 | number representing the first entry of the node, and state as a | |
1749 | TRIE_NODENUM() which is the trans number. state 1 is TRIE_NODEIDX(1) and | |
1750 | TRIE_NODENUM(1), state 2 is TRIE_NODEIDX(2) and TRIE_NODENUM(3) if there | |
1751 | are 2 entrys per node. eg: | |
1752 | ||
1753 | A B A B | |
1754 | 1. 2 4 1. 3 7 | |
1755 | 2. 0 3 3. 0 5 | |
1756 | 3. 0 0 5. 0 0 | |
1757 | 4. 0 0 7. 0 0 | |
1758 | ||
1759 | The table is internally in the right hand, idx form. However as we also | |
1760 | have to deal with the states array which is indexed by nodenum we have to | |
1761 | use TRIE_NODENUM() to convert. | |
1762 | ||
1763 | */ | |
1e2e3d02 YO |
1764 | DEBUG_TRIE_COMPILE_MORE_r( PerlIO_printf( Perl_debug_log, |
1765 | "%*sCompiling trie using table compiler\n", | |
1766 | (int)depth * 2 + 2, "")); | |
3dab1dad | 1767 | |
c944940b JH |
1768 | trie->trans = (reg_trie_trans *) |
1769 | PerlMemShared_calloc( ( TRIE_CHARCOUNT(trie) + 1 ) | |
1770 | * trie->uniquecharcount + 1, | |
1771 | sizeof(reg_trie_trans) ); | |
1772 | trie->states = (reg_trie_state *) | |
1773 | PerlMemShared_calloc( TRIE_CHARCOUNT(trie) + 2, | |
1774 | sizeof(reg_trie_state) ); | |
a3621e74 YO |
1775 | next_alloc = trie->uniquecharcount + 1; |
1776 | ||
3dab1dad | 1777 | |
a3621e74 YO |
1778 | for ( cur = first ; cur < last ; cur = regnext( cur ) ) { |
1779 | ||
c445ea15 | 1780 | regnode * const noper = NEXTOPER( cur ); |
a28509cc AL |
1781 | const U8 *uc = (U8*)STRING( noper ); |
1782 | const U8 * const e = uc + STR_LEN( noper ); | |
a3621e74 YO |
1783 | |
1784 | U32 state = 1; /* required init */ | |
1785 | ||
1786 | U16 charid = 0; /* sanity init */ | |
1787 | U32 accept_state = 0; /* sanity init */ | |
1788 | U8 *scan = (U8*)NULL; /* sanity init */ | |
1789 | ||
1790 | STRLEN foldlen = 0; /* required init */ | |
07be1b83 | 1791 | U32 wordlen = 0; /* required init */ |
a3621e74 YO |
1792 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; |
1793 | ||
3dab1dad | 1794 | if ( OP(noper) != NOTHING ) { |
786e8c11 | 1795 | for ( ; uc < e ; uc += len ) { |
a3621e74 | 1796 | |
786e8c11 | 1797 | TRIE_READ_CHAR; |
a3621e74 | 1798 | |
786e8c11 YO |
1799 | if ( uvc < 256 ) { |
1800 | charid = trie->charmap[ uvc ]; | |
1801 | } else { | |
55eed653 | 1802 | SV* const * const svpp = hv_fetch( widecharmap, (char*)&uvc, sizeof( UV ), 0); |
786e8c11 | 1803 | charid = svpp ? (U16)SvIV(*svpp) : 0; |
a3621e74 | 1804 | } |
786e8c11 YO |
1805 | if ( charid ) { |
1806 | charid--; | |
1807 | if ( !trie->trans[ state + charid ].next ) { | |
1808 | trie->trans[ state + charid ].next = next_alloc; | |
1809 | trie->trans[ state ].check++; | |
2e64971a DM |
1810 | prev_states[TRIE_NODENUM(next_alloc)] |
1811 | = TRIE_NODENUM(state); | |
786e8c11 YO |
1812 | next_alloc += trie->uniquecharcount; |
1813 | } | |
1814 | state = trie->trans[ state + charid ].next; | |
1815 | } else { | |
1816 | Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc ); | |
1817 | } | |
1818 | /* charid is now 0 if we dont know the char read, or nonzero if we do */ | |
a3621e74 | 1819 | } |
a3621e74 | 1820 | } |
3dab1dad YO |
1821 | accept_state = TRIE_NODENUM( state ); |
1822 | TRIE_HANDLE_WORD(accept_state); | |
a3621e74 YO |
1823 | |
1824 | } /* end second pass */ | |
1825 | ||
3dab1dad | 1826 | /* and now dump it out before we compress it */ |
2b8b4781 NC |
1827 | DEBUG_TRIE_COMPILE_MORE_r(dump_trie_interim_table(trie, widecharmap, |
1828 | revcharmap, | |
1829 | next_alloc, depth+1)); | |
a3621e74 | 1830 | |
a3621e74 YO |
1831 | { |
1832 | /* | |
1833 | * Inplace compress the table.* | |
1834 | ||
1835 | For sparse data sets the table constructed by the trie algorithm will | |
1836 | be mostly 0/FAIL transitions or to put it another way mostly empty. | |
1837 | (Note that leaf nodes will not contain any transitions.) | |
1838 | ||
1839 | This algorithm compresses the tables by eliminating most such | |
1840 | transitions, at the cost of a modest bit of extra work during lookup: | |
1841 | ||
1842 | - Each states[] entry contains a .base field which indicates the | |
1843 | index in the state[] array wheres its transition data is stored. | |
1844 | ||
3b753521 | 1845 | - If .base is 0 there are no valid transitions from that node. |
a3621e74 YO |
1846 | |
1847 | - If .base is nonzero then charid is added to it to find an entry in | |
1848 | the trans array. | |
1849 | ||
1850 | -If trans[states[state].base+charid].check!=state then the | |
1851 | transition is taken to be a 0/Fail transition. Thus if there are fail | |
1852 | transitions at the front of the node then the .base offset will point | |
1853 | somewhere inside the previous nodes data (or maybe even into a node | |
1854 | even earlier), but the .check field determines if the transition is | |
1855 | valid. | |
1856 | ||
786e8c11 | 1857 | XXX - wrong maybe? |
a3621e74 | 1858 | The following process inplace converts the table to the compressed |
3b753521 | 1859 | table: We first do not compress the root node 1,and mark all its |
a3621e74 | 1860 | .check pointers as 1 and set its .base pointer as 1 as well. This |
3b753521 FN |
1861 | allows us to do a DFA construction from the compressed table later, |
1862 | and ensures that any .base pointers we calculate later are greater | |
1863 | than 0. | |
a3621e74 YO |
1864 | |
1865 | - We set 'pos' to indicate the first entry of the second node. | |
1866 | ||
1867 | - We then iterate over the columns of the node, finding the first and | |
1868 | last used entry at l and m. We then copy l..m into pos..(pos+m-l), | |
1869 | and set the .check pointers accordingly, and advance pos | |
1870 | appropriately and repreat for the next node. Note that when we copy | |
1871 | the next pointers we have to convert them from the original | |
1872 | NODEIDX form to NODENUM form as the former is not valid post | |
1873 | compression. | |
1874 | ||
1875 | - If a node has no transitions used we mark its base as 0 and do not | |
1876 | advance the pos pointer. | |
1877 | ||
1878 | - If a node only has one transition we use a second pointer into the | |
1879 | structure to fill in allocated fail transitions from other states. | |
1880 | This pointer is independent of the main pointer and scans forward | |
1881 | looking for null transitions that are allocated to a state. When it | |
1882 | finds one it writes the single transition into the "hole". If the | |
786e8c11 | 1883 | pointer doesnt find one the single transition is appended as normal. |
a3621e74 YO |
1884 | |
1885 | - Once compressed we can Renew/realloc the structures to release the | |
1886 | excess space. | |
1887 | ||
1888 | See "Table-Compression Methods" in sec 3.9 of the Red Dragon, | |
1889 | specifically Fig 3.47 and the associated pseudocode. | |
1890 | ||
1891 | demq | |
1892 | */ | |
a3b680e6 | 1893 | const U32 laststate = TRIE_NODENUM( next_alloc ); |
a28509cc | 1894 | U32 state, charid; |
a3621e74 | 1895 | U32 pos = 0, zp=0; |
1e2e3d02 | 1896 | trie->statecount = laststate; |
a3621e74 YO |
1897 | |
1898 | for ( state = 1 ; state < laststate ; state++ ) { | |
1899 | U8 flag = 0; | |
a28509cc AL |
1900 | const U32 stateidx = TRIE_NODEIDX( state ); |
1901 | const U32 o_used = trie->trans[ stateidx ].check; | |
1902 | U32 used = trie->trans[ stateidx ].check; | |
a3621e74 YO |
1903 | trie->trans[ stateidx ].check = 0; |
1904 | ||
1905 | for ( charid = 0 ; used && charid < trie->uniquecharcount ; charid++ ) { | |
1906 | if ( flag || trie->trans[ stateidx + charid ].next ) { | |
1907 | if ( trie->trans[ stateidx + charid ].next ) { | |
1908 | if (o_used == 1) { | |
1909 | for ( ; zp < pos ; zp++ ) { | |
1910 | if ( ! trie->trans[ zp ].next ) { | |
1911 | break; | |
1912 | } | |
1913 | } | |
1914 | trie->states[ state ].trans.base = zp + trie->uniquecharcount - charid ; | |
1915 | trie->trans[ zp ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next ); | |
1916 | trie->trans[ zp ].check = state; | |
1917 | if ( ++zp > pos ) pos = zp; | |
1918 | break; | |
1919 | } | |
1920 | used--; | |
1921 | } | |
1922 | if ( !flag ) { | |
1923 | flag = 1; | |
1924 | trie->states[ state ].trans.base = pos + trie->uniquecharcount - charid ; | |
1925 | } | |
1926 | trie->trans[ pos ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next ); | |
1927 | trie->trans[ pos ].check = state; | |
1928 | pos++; | |
1929 | } | |
1930 | } | |
1931 | } | |
cc601c31 | 1932 | trie->lasttrans = pos + 1; |
c944940b JH |
1933 | trie->states = (reg_trie_state *) |
1934 | PerlMemShared_realloc( trie->states, laststate | |
1935 | * sizeof(reg_trie_state) ); | |
a3621e74 | 1936 | DEBUG_TRIE_COMPILE_MORE_r( |
e4584336 | 1937 | PerlIO_printf( Perl_debug_log, |
3dab1dad YO |
1938 | "%*sAlloc: %d Orig: %"IVdf" elements, Final:%"IVdf". Savings of %%%5.2f\n", |
1939 | (int)depth * 2 + 2,"", | |
1940 | (int)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1 ), | |
5d7488b2 AL |
1941 | (IV)next_alloc, |
1942 | (IV)pos, | |
a3621e74 YO |
1943 | ( ( next_alloc - pos ) * 100 ) / (double)next_alloc ); |
1944 | ); | |
1945 | ||
1946 | } /* end table compress */ | |
1947 | } | |
1e2e3d02 YO |
1948 | DEBUG_TRIE_COMPILE_MORE_r( |
1949 | PerlIO_printf(Perl_debug_log, "%*sStatecount:%"UVxf" Lasttrans:%"UVxf"\n", | |
1950 | (int)depth * 2 + 2, "", | |
1951 | (UV)trie->statecount, | |
1952 | (UV)trie->lasttrans) | |
1953 | ); | |
cc601c31 | 1954 | /* resize the trans array to remove unused space */ |
c944940b JH |
1955 | trie->trans = (reg_trie_trans *) |
1956 | PerlMemShared_realloc( trie->trans, trie->lasttrans | |
1957 | * sizeof(reg_trie_trans) ); | |
a3621e74 | 1958 | |
3b753521 | 1959 | { /* Modify the program and insert the new TRIE node */ |
3dab1dad YO |
1960 | U8 nodetype =(U8)(flags & 0xFF); |
1961 | char *str=NULL; | |
786e8c11 | 1962 | |
07be1b83 | 1963 | #ifdef DEBUGGING |
e62cc96a | 1964 | regnode *optimize = NULL; |
7122b237 YO |
1965 | #ifdef RE_TRACK_PATTERN_OFFSETS |
1966 | ||
b57a0404 JH |
1967 | U32 mjd_offset = 0; |
1968 | U32 mjd_nodelen = 0; | |
7122b237 YO |
1969 | #endif /* RE_TRACK_PATTERN_OFFSETS */ |
1970 | #endif /* DEBUGGING */ | |
a3621e74 | 1971 | /* |
3dab1dad YO |
1972 | This means we convert either the first branch or the first Exact, |
1973 | depending on whether the thing following (in 'last') is a branch | |
1974 | or not and whther first is the startbranch (ie is it a sub part of | |
1975 | the alternation or is it the whole thing.) | |
3b753521 | 1976 | Assuming its a sub part we convert the EXACT otherwise we convert |
3dab1dad | 1977 | the whole branch sequence, including the first. |
a3621e74 | 1978 | */ |
3dab1dad | 1979 | /* Find the node we are going to overwrite */ |
7f69552c | 1980 | if ( first != startbranch || OP( last ) == BRANCH ) { |
07be1b83 | 1981 | /* branch sub-chain */ |
3dab1dad | 1982 | NEXT_OFF( first ) = (U16)(last - first); |
7122b237 | 1983 | #ifdef RE_TRACK_PATTERN_OFFSETS |
07be1b83 YO |
1984 | DEBUG_r({ |
1985 | mjd_offset= Node_Offset((convert)); | |
1986 | mjd_nodelen= Node_Length((convert)); | |
1987 | }); | |
7122b237 | 1988 | #endif |
7f69552c | 1989 | /* whole branch chain */ |
7122b237 YO |
1990 | } |
1991 | #ifdef RE_TRACK_PATTERN_OFFSETS | |
1992 | else { | |
7f69552c YO |
1993 | DEBUG_r({ |
1994 | const regnode *nop = NEXTOPER( convert ); | |
1995 | mjd_offset= Node_Offset((nop)); | |
1996 | mjd_nodelen= Node_Length((nop)); | |
1997 | }); | |
07be1b83 YO |
1998 | } |
1999 | DEBUG_OPTIMISE_r( | |
2000 | PerlIO_printf(Perl_debug_log, "%*sMJD offset:%"UVuf" MJD length:%"UVuf"\n", | |
2001 | (int)depth * 2 + 2, "", | |
786e8c11 | 2002 | (UV)mjd_offset, (UV)mjd_nodelen) |
07be1b83 | 2003 | ); |
7122b237 | 2004 | #endif |
3dab1dad YO |
2005 | /* But first we check to see if there is a common prefix we can |
2006 | split out as an EXACT and put in front of the TRIE node. */ | |
2007 | trie->startstate= 1; | |
55eed653 | 2008 | if ( trie->bitmap && !widecharmap && !trie->jump ) { |
3dab1dad | 2009 | U32 state; |
1e2e3d02 | 2010 | for ( state = 1 ; state < trie->statecount-1 ; state++ ) { |
a3621e74 | 2011 | U32 ofs = 0; |
8e11feef RGS |
2012 | I32 idx = -1; |
2013 | U32 count = 0; | |
2014 | const U32 base = trie->states[ state ].trans.base; | |
a3621e74 | 2015 | |
3dab1dad | 2016 | if ( trie->states[state].wordnum ) |
8e11feef | 2017 | count = 1; |
a3621e74 | 2018 | |
8e11feef | 2019 | for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) { |
cc601c31 YO |
2020 | if ( ( base + ofs >= trie->uniquecharcount ) && |
2021 | ( base + ofs - trie->uniquecharcount < trie->lasttrans ) && | |
a3621e74 YO |
2022 | trie->trans[ base + ofs - trie->uniquecharcount ].check == state ) |
2023 | { | |
3dab1dad | 2024 | if ( ++count > 1 ) { |
2b8b4781 | 2025 | SV **tmp = av_fetch( revcharmap, ofs, 0); |
07be1b83 | 2026 | const U8 *ch = (U8*)SvPV_nolen_const( *tmp ); |
8e11feef | 2027 | if ( state == 1 ) break; |
3dab1dad YO |
2028 | if ( count == 2 ) { |
2029 | Zero(trie->bitmap, ANYOF_BITMAP_SIZE, char); | |
2030 | DEBUG_OPTIMISE_r( | |
8e11feef RGS |
2031 | PerlIO_printf(Perl_debug_log, |
2032 | "%*sNew Start State=%"UVuf" Class: [", | |
2033 | (int)depth * 2 + 2, "", | |
786e8c11 | 2034 | (UV)state)); |
be8e71aa | 2035 | if (idx >= 0) { |
2b8b4781 | 2036 | SV ** const tmp = av_fetch( revcharmap, idx, 0); |
be8e71aa | 2037 | const U8 * const ch = (U8*)SvPV_nolen_const( *tmp ); |
8e11feef | 2038 | |
3dab1dad | 2039 | TRIE_BITMAP_SET(trie,*ch); |
8e11feef RGS |
2040 | if ( folder ) |
2041 | TRIE_BITMAP_SET(trie, folder[ *ch ]); | |
3dab1dad | 2042 | DEBUG_OPTIMISE_r( |
f1f66076 | 2043 | PerlIO_printf(Perl_debug_log, "%s", (char*)ch) |
3dab1dad | 2044 | ); |
8e11feef RGS |
2045 | } |
2046 | } | |
2047 | TRIE_BITMAP_SET(trie,*ch); | |
2048 | if ( folder ) | |
2049 | TRIE_BITMAP_SET(trie,folder[ *ch ]); | |
2050 | DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"%s", ch)); | |
2051 | } | |
2052 | idx = ofs; | |
2053 | } | |
3dab1dad YO |
2054 | } |
2055 | if ( count == 1 ) { | |
2b8b4781 | 2056 | SV **tmp = av_fetch( revcharmap, idx, 0); |
c490c714 YO |
2057 | STRLEN len; |
2058 | char *ch = SvPV( *tmp, len ); | |
de734bd5 A |
2059 | DEBUG_OPTIMISE_r({ |
2060 | SV *sv=sv_newmortal(); | |
8e11feef RGS |
2061 | PerlIO_printf( Perl_debug_log, |
2062 | "%*sPrefix State: %"UVuf" Idx:%"UVuf" Char='%s'\n", | |
2063 | (int)depth * 2 + 2, "", | |
de734bd5 A |
2064 | (UV)state, (UV)idx, |
2065 | pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), 6, | |
2066 | PL_colors[0], PL_colors[1], | |
2067 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) | | |
2068 | PERL_PV_ESCAPE_FIRSTCHAR | |
2069 | ) | |
2070 | ); | |
2071 | }); | |
3dab1dad YO |
2072 | if ( state==1 ) { |
2073 | OP( convert ) = nodetype; | |
2074 | str=STRING(convert); | |
2075 | STR_LEN(convert)=0; | |
2076 | } | |
c490c714 YO |
2077 | STR_LEN(convert) += len; |
2078 | while (len--) | |
de734bd5 | 2079 | *str++ = *ch++; |
8e11feef | 2080 | } else { |
f9049ba1 | 2081 | #ifdef DEBUGGING |
8e11feef RGS |
2082 | if (state>1) |
2083 | DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"]\n")); | |
f9049ba1 | 2084 | #endif |
8e11feef RGS |
2085 | break; |
2086 | } | |
2087 | } | |
2e64971a | 2088 | trie->prefixlen = (state-1); |
3dab1dad | 2089 | if (str) { |
8e11feef | 2090 | regnode *n = convert+NODE_SZ_STR(convert); |
07be1b83 | 2091 | NEXT_OFF(convert) = NODE_SZ_STR(convert); |
8e11feef | 2092 | trie->startstate = state; |
07be1b83 YO |
2093 | trie->minlen -= (state - 1); |
2094 | trie->maxlen -= (state - 1); | |
33809eae JH |
2095 | #ifdef DEBUGGING |
2096 | /* At least the UNICOS C compiler choked on this | |
2097 | * being argument to DEBUG_r(), so let's just have | |
2098 | * it right here. */ | |
2099 | if ( | |
2100 | #ifdef PERL_EXT_RE_BUILD | |
2101 | 1 | |
2102 | #else | |
2103 | DEBUG_r_TEST | |
2104 | #endif | |
2105 | ) { | |
2106 | regnode *fix = convert; | |
2107 | U32 word = trie->wordcount; | |
2108 | mjd_nodelen++; | |
2109 | Set_Node_Offset_Length(convert, mjd_offset, state - 1); | |
2110 | while( ++fix < n ) { | |
2111 | Set_Node_Offset_Length(fix, 0, 0); | |
2112 | } | |
2113 | while (word--) { | |
2114 | SV ** const tmp = av_fetch( trie_words, word, 0 ); | |
2115 | if (tmp) { | |
2116 | if ( STR_LEN(convert) <= SvCUR(*tmp) ) | |
2117 | sv_chop(*tmp, SvPV_nolen(*tmp) + STR_LEN(convert)); | |
2118 | else | |
2119 | sv_chop(*tmp, SvPV_nolen(*tmp) + SvCUR(*tmp)); | |
2120 | } | |
2121 | } | |
2122 | } | |
2123 | #endif | |
8e11feef RGS |
2124 | if (trie->maxlen) { |
2125 | convert = n; | |
2126 | } else { | |
3dab1dad | 2127 | NEXT_OFF(convert) = (U16)(tail - convert); |
a5ca303d | 2128 | DEBUG_r(optimize= n); |
3dab1dad YO |
2129 | } |
2130 | } | |
2131 | } | |
a5ca303d YO |
2132 | if (!jumper) |
2133 | jumper = last; | |
3dab1dad | 2134 | if ( trie->maxlen ) { |
8e11feef RGS |
2135 | NEXT_OFF( convert ) = (U16)(tail - convert); |
2136 | ARG_SET( convert, data_slot ); | |
786e8c11 YO |
2137 | /* Store the offset to the first unabsorbed branch in |
2138 | jump[0], which is otherwise unused by the jump logic. | |
2139 | We use this when dumping a trie and during optimisation. */ | |
2140 | if (trie->jump) | |
7f69552c | 2141 | trie->jump[0] = (U16)(nextbranch - convert); |
a5ca303d | 2142 | |
6c48061a YO |
2143 | /* If the start state is not accepting (meaning there is no empty string/NOTHING) |
2144 | * and there is a bitmap | |
2145 | * and the first "jump target" node we found leaves enough room | |
2146 | * then convert the TRIE node into a TRIEC node, with the bitmap | |
2147 | * embedded inline in the opcode - this is hypothetically faster. | |
2148 | */ | |
2149 | if ( !trie->states[trie->startstate].wordnum | |
2150 | && trie->bitmap | |
2151 | && ( (char *)jumper - (char *)convert) >= (int)sizeof(struct regnode_charclass) ) | |
786e8c11 YO |
2152 | { |
2153 | OP( convert ) = TRIEC; | |
2154 | Copy(trie->bitmap, ((struct regnode_charclass *)convert)->bitmap, ANYOF_BITMAP_SIZE, char); | |
446bd890 | 2155 | PerlMemShared_free(trie->bitmap); |
786e8c11 YO |
2156 | trie->bitmap= NULL; |
2157 | } else | |
2158 | OP( convert ) = TRIE; | |
a3621e74 | 2159 | |
3dab1dad YO |
2160 | /* store the type in the flags */ |
2161 | convert->flags = nodetype; | |
a5ca303d YO |
2162 | DEBUG_r({ |
2163 | optimize = convert | |
2164 | + NODE_STEP_REGNODE | |
2165 | + regarglen[ OP( convert ) ]; | |
2166 | }); | |
2167 | /* XXX We really should free up the resource in trie now, | |
2168 | as we won't use them - (which resources?) dmq */ | |
3dab1dad | 2169 | } |
a3621e74 | 2170 | /* needed for dumping*/ |
e62cc96a | 2171 | DEBUG_r(if (optimize) { |
07be1b83 | 2172 | regnode *opt = convert; |
bcdf7404 | 2173 | |
e62cc96a | 2174 | while ( ++opt < optimize) { |
07be1b83 YO |
2175 | Set_Node_Offset_Length(opt,0,0); |
2176 | } | |
786e8c11 YO |
2177 | /* |
2178 | Try to clean up some of the debris left after the | |
2179 | optimisation. | |
a3621e74 | 2180 | */ |
786e8c11 | 2181 | while( optimize < jumper ) { |
07be1b83 | 2182 | mjd_nodelen += Node_Length((optimize)); |
a3621e74 | 2183 | OP( optimize ) = OPTIMIZED; |
07be1b83 | 2184 | Set_Node_Offset_Length(optimize,0,0); |
a3621e74 YO |
2185 | optimize++; |
2186 | } | |
07be1b83 | 2187 | Set_Node_Offset_Length(convert,mjd_offset,mjd_nodelen); |
a3621e74 YO |
2188 | }); |
2189 | } /* end node insert */ | |
2e64971a DM |
2190 | |
2191 | /* Finish populating the prev field of the wordinfo array. Walk back | |
2192 | * from each accept state until we find another accept state, and if | |
2193 | * so, point the first word's .prev field at the second word. If the | |
2194 | * second already has a .prev field set, stop now. This will be the | |
2195 | * case either if we've already processed that word's accept state, | |
3b753521 FN |
2196 | * or that state had multiple words, and the overspill words were |
2197 | * already linked up earlier. | |
2e64971a DM |
2198 | */ |
2199 | { | |
2200 | U16 word; | |
2201 | U32 state; | |
2202 | U16 prev; | |
2203 | ||
2204 | for (word=1; word <= trie->wordcount; word++) { | |
2205 | prev = 0; | |
2206 | if (trie->wordinfo[word].prev) | |
2207 | continue; | |
2208 | state = trie->wordinfo[word].accept; | |
2209 | while (state) { | |
2210 | state = prev_states[state]; | |
2211 | if (!state) | |
2212 | break; | |
2213 | prev = trie->states[state].wordnum; | |
2214 | if (prev) | |
2215 | break; | |
2216 | } | |
2217 | trie->wordinfo[word].prev = prev; | |
2218 | } | |
2219 | Safefree(prev_states); | |
2220 | } | |
2221 | ||
2222 | ||
2223 | /* and now dump out the compressed format */ | |
2224 | DEBUG_TRIE_COMPILE_r(dump_trie(trie, widecharmap, revcharmap, depth+1)); | |
2225 | ||
55eed653 | 2226 | RExC_rxi->data->data[ data_slot + 1 ] = (void*)widecharmap; |
2b8b4781 NC |
2227 | #ifdef DEBUGGING |
2228 | RExC_rxi->data->data[ data_slot + TRIE_WORDS_OFFSET ] = (void*)trie_words; | |
2229 | RExC_rxi->data->data[ data_slot + 3 ] = (void*)revcharmap; | |
2230 | #else | |
2231 | SvREFCNT_dec(revcharmap); | |
07be1b83 | 2232 | #endif |
786e8c11 YO |
2233 | return trie->jump |
2234 | ? MADE_JUMP_TRIE | |
2235 | : trie->startstate>1 | |
2236 | ? MADE_EXACT_TRIE | |
2237 | : MADE_TRIE; | |
2238 | } | |
2239 | ||
2240 | STATIC void | |
2241 | S_make_trie_failtable(pTHX_ RExC_state_t *pRExC_state, regnode *source, regnode *stclass, U32 depth) | |
2242 | { | |
3b753521 | 2243 | /* The Trie is constructed and compressed now so we can build a fail array if it's needed |
786e8c11 YO |
2244 | |
2245 | This is basically the Aho-Corasick algorithm. Its from exercise 3.31 and 3.32 in the | |
2246 | "Red Dragon" -- Compilers, principles, techniques, and tools. Aho, Sethi, Ullman 1985/88 | |
2247 | ISBN 0-201-10088-6 | |
2248 | ||
2249 | We find the fail state for each state in the trie, this state is the longest proper | |
3b753521 FN |
2250 | suffix of the current state's 'word' that is also a proper prefix of another word in our |
2251 | trie. State 1 represents the word '' and is thus the default fail state. This allows | |
786e8c11 YO |
2252 | the DFA not to have to restart after its tried and failed a word at a given point, it |
2253 | simply continues as though it had been matching the other word in the first place. | |
2254 | Consider | |
2255 | 'abcdgu'=~/abcdefg|cdgu/ | |
2256 | When we get to 'd' we are still matching the first word, we would encounter 'g' which would | |
3b753521 FN |
2257 | fail, which would bring us to the state representing 'd' in the second word where we would |
2258 | try 'g' and succeed, proceeding to match 'cdgu'. | |
786e8c11 YO |
2259 | */ |
2260 | /* add a fail transition */ | |
3251b653 NC |
2261 | const U32 trie_offset = ARG(source); |
2262 | reg_trie_data *trie=(reg_trie_data *)RExC_rxi->data->data[trie_offset]; | |
786e8c11 YO |
2263 | U32 *q; |
2264 | const U32 ucharcount = trie->uniquecharcount; | |
1e2e3d02 | 2265 | const U32 numstates = trie->statecount; |
786e8c11 YO |
2266 | const U32 ubound = trie->lasttrans + ucharcount; |
2267 | U32 q_read = 0; | |
2268 | U32 q_write = 0; | |
2269 | U32 charid; | |
2270 | U32 base = trie->states[ 1 ].trans.base; | |
2271 | U32 *fail; | |
2272 | reg_ac_data *aho; | |
2273 | const U32 data_slot = add_data( pRExC_state, 1, "T" ); | |
2274 | GET_RE_DEBUG_FLAGS_DECL; | |
7918f24d NC |
2275 | |
2276 | PERL_ARGS_ASSERT_MAKE_TRIE_FAILTABLE; | |
786e8c11 YO |
2277 | #ifndef DEBUGGING |
2278 | PERL_UNUSED_ARG(depth); | |
2279 | #endif | |
2280 | ||
2281 | ||
2282 | ARG_SET( stclass, data_slot ); | |
c944940b | 2283 | aho = (reg_ac_data *) PerlMemShared_calloc( 1, sizeof(reg_ac_data) ); |
f8fc2ecf | 2284 | RExC_rxi->data->data[ data_slot ] = (void*)aho; |
3251b653 | 2285 | aho->trie=trie_offset; |
446bd890 NC |
2286 | aho->states=(reg_trie_state *)PerlMemShared_malloc( numstates * sizeof(reg_trie_state) ); |
2287 | Copy( trie->states, aho->states, numstates, reg_trie_state ); | |
786e8c11 | 2288 | Newxz( q, numstates, U32); |
c944940b | 2289 | aho->fail = (U32 *) PerlMemShared_calloc( numstates, sizeof(U32) ); |
786e8c11 YO |
2290 | aho->refcount = 1; |
2291 | fail = aho->fail; | |
2292 | /* initialize fail[0..1] to be 1 so that we always have | |
2293 | a valid final fail state */ | |
2294 | fail[ 0 ] = fail[ 1 ] = 1; | |
2295 | ||
2296 | for ( charid = 0; charid < ucharcount ; charid++ ) { | |
2297 | const U32 newstate = TRIE_TRANS_STATE( 1, base, ucharcount, charid, 0 ); | |
2298 | if ( newstate ) { | |
2299 | q[ q_write ] = newstate; | |
2300 | /* set to point at the root */ | |
2301 | fail[ q[ q_write++ ] ]=1; | |
2302 | } | |
2303 | } | |
2304 | while ( q_read < q_write) { | |
2305 | const U32 cur = q[ q_read++ % numstates ]; | |
2306 | base = trie->states[ cur ].trans.base; | |
2307 | ||
2308 | for ( charid = 0 ; charid < ucharcount ; charid++ ) { | |
2309 | const U32 ch_state = TRIE_TRANS_STATE( cur, base, ucharcount, charid, 1 ); | |
2310 | if (ch_state) { | |
2311 | U32 fail_state = cur; | |
2312 | U32 fail_base; | |
2313 | do { | |
2314 | fail_state = fail[ fail_state ]; | |
2315 | fail_base = aho->states[ fail_state ].trans.base; | |
2316 | } while ( !TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ) ); | |
2317 | ||
2318 | fail_state = TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ); | |
2319 | fail[ ch_state ] = fail_state; | |
2320 | if ( !aho->states[ ch_state ].wordnum && aho->states[ fail_state ].wordnum ) | |
2321 | { | |
2322 | aho->states[ ch_state ].wordnum = aho->states[ fail_state ].wordnum; | |
2323 | } | |
2324 | q[ q_write++ % numstates] = ch_state; | |
2325 | } | |
2326 | } | |
2327 | } | |
2328 | /* restore fail[0..1] to 0 so that we "fall out" of the AC loop | |
2329 | when we fail in state 1, this allows us to use the | |
2330 | charclass scan to find a valid start char. This is based on the principle | |
2331 | that theres a good chance the string being searched contains lots of stuff | |
2332 | that cant be a start char. | |
2333 | */ | |
2334 | fail[ 0 ] = fail[ 1 ] = 0; | |
2335 | DEBUG_TRIE_COMPILE_r({ | |
6d99fb9b JH |
2336 | PerlIO_printf(Perl_debug_log, |
2337 | "%*sStclass Failtable (%"UVuf" states): 0", | |
2338 | (int)(depth * 2), "", (UV)numstates | |
1e2e3d02 | 2339 | ); |
786e8c11 YO |
2340 | for( q_read=1; q_read<numstates; q_read++ ) { |
2341 | PerlIO_printf(Perl_debug_log, ", %"UVuf, (UV)fail[q_read]); | |
2342 | } | |
2343 | PerlIO_printf(Perl_debug_log, "\n"); | |
2344 | }); | |
2345 | Safefree(q); | |
2346 | /*RExC_seen |= REG_SEEN_TRIEDFA;*/ | |
a3621e74 YO |
2347 | } |
2348 | ||
786e8c11 | 2349 | |
a3621e74 | 2350 | /* |
5d1c421c JH |
2351 | * There are strange code-generation bugs caused on sparc64 by gcc-2.95.2. |
2352 | * These need to be revisited when a newer toolchain becomes available. | |
2353 | */ | |
2354 | #if defined(__sparc64__) && defined(__GNUC__) | |
2355 | # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96) | |
2356 | # undef SPARC64_GCC_WORKAROUND | |
2357 | # define SPARC64_GCC_WORKAROUND 1 | |
2358 | # endif | |
2359 | #endif | |
2360 | ||
07be1b83 | 2361 | #define DEBUG_PEEP(str,scan,depth) \ |
b515a41d | 2362 | DEBUG_OPTIMISE_r({if (scan){ \ |
07be1b83 YO |
2363 | SV * const mysv=sv_newmortal(); \ |
2364 | regnode *Next = regnext(scan); \ | |
2365 | regprop(RExC_rx, mysv, scan); \ | |
7f69552c | 2366 | PerlIO_printf(Perl_debug_log, "%*s" str ">%3d: %s (%d)\n", \ |
07be1b83 YO |
2367 | (int)depth*2, "", REG_NODE_NUM(scan), SvPV_nolen_const(mysv),\ |
2368 | Next ? (REG_NODE_NUM(Next)) : 0 ); \ | |
b515a41d | 2369 | }}); |
07be1b83 | 2370 | |
1de06328 YO |
2371 | |
2372 | ||
2373 | ||
2374 | ||
07be1b83 YO |
2375 | #define JOIN_EXACT(scan,min,flags) \ |
2376 | if (PL_regkind[OP(scan)] == EXACT) \ | |
2377 | join_exact(pRExC_state,(scan),(min),(flags),NULL,depth+1) | |
2378 | ||
be8e71aa | 2379 | STATIC U32 |
07be1b83 YO |
2380 | S_join_exact(pTHX_ RExC_state_t *pRExC_state, regnode *scan, I32 *min, U32 flags,regnode *val, U32 depth) { |
2381 | /* Merge several consecutive EXACTish nodes into one. */ | |
2382 | regnode *n = regnext(scan); | |
2383 | U32 stringok = 1; | |
2384 | regnode *next = scan + NODE_SZ_STR(scan); | |
2385 | U32 merged = 0; | |
2386 | U32 stopnow = 0; | |
2387 | #ifdef DEBUGGING | |
2388 | regnode *stop = scan; | |
72f13be8 | 2389 | GET_RE_DEBUG_FLAGS_DECL; |
f9049ba1 | 2390 | #else |
d47053eb RGS |
2391 | PERL_UNUSED_ARG(depth); |
2392 | #endif | |
7918f24d NC |
2393 | |
2394 | PERL_ARGS_ASSERT_JOIN_EXACT; | |
d47053eb | 2395 | #ifndef EXPERIMENTAL_INPLACESCAN |
f9049ba1 SP |
2396 | PERL_UNUSED_ARG(flags); |
2397 | PERL_UNUSED_ARG(val); | |
07be1b83 | 2398 | #endif |
07be1b83 YO |
2399 | DEBUG_PEEP("join",scan,depth); |
2400 | ||
2401 | /* Skip NOTHING, merge EXACT*. */ | |
2402 | while (n && | |
2403 | ( PL_regkind[OP(n)] == NOTHING || | |
2404 | (stringok && (OP(n) == OP(scan)))) | |
2405 | && NEXT_OFF(n) | |
2406 | && NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) { | |
2407 | ||
2408 | if (OP(n) == TAIL || n > next) | |
2409 | stringok = 0; | |
2410 | if (PL_regkind[OP(n)] == NOTHING) { | |
07be1b83 YO |
2411 | DEBUG_PEEP("skip:",n,depth); |
2412 | NEXT_OFF(scan) += NEXT_OFF(n); | |
2413 | next = n + NODE_STEP_REGNODE; | |
2414 | #ifdef DEBUGGING | |
2415 | if (stringok) | |
2416 | stop = n; | |
2417 | #endif | |
2418 | n = regnext(n); | |
2419 | } | |
2420 | else if (stringok) { | |
786e8c11 | 2421 | const unsigned int oldl = STR_LEN(scan); |
07be1b83 YO |
2422 | regnode * const nnext = regnext(n); |
2423 | ||
2424 | DEBUG_PEEP("merg",n,depth); | |
2425 | ||
2426 | merged++; | |
2427 | if (oldl + STR_LEN(n) > U8_MAX) | |
2428 | break; | |
2429 | NEXT_OFF(scan) += NEXT_OFF(n); | |
2430 | STR_LEN(scan) += STR_LEN(n); | |
2431 | next = n + NODE_SZ_STR(n); | |
2432 | /* Now we can overwrite *n : */ | |
2433 | Move(STRING(n), STRING(scan) + oldl, STR_LEN(n), char); | |
2434 | #ifdef DEBUGGING | |
2435 | stop = next - 1; | |
2436 | #endif | |
2437 | n = nnext; | |
2438 | if (stopnow) break; | |
2439 | } | |
2440 | ||
d47053eb RGS |
2441 | #ifdef EXPERIMENTAL_INPLACESCAN |
2442 | if (flags && !NEXT_OFF(n)) { | |
2443 | DEBUG_PEEP("atch", val, depth); | |
2444 | if (reg_off_by_arg[OP(n)]) { | |
2445 | ARG_SET(n, val - n); | |
2446 | } | |
2447 | else { | |
2448 | NEXT_OFF(n) = val - n; | |
2449 | } | |
2450 | stopnow = 1; | |
2451 | } | |
07be1b83 YO |
2452 | #endif |
2453 | } | |
2454 | ||
2455 | if (UTF && ( OP(scan) == EXACTF ) && ( STR_LEN(scan) >= 6 ) ) { | |
2456 | /* | |
2457 | Two problematic code points in Unicode casefolding of EXACT nodes: | |
2458 | ||
2459 | U+0390 - GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS | |
2460 | U+03B0 - GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND TONOS | |
2461 | ||
2462 | which casefold to | |
2463 | ||
2464 | Unicode UTF-8 | |
2465 | ||
2466 | U+03B9 U+0308 U+0301 0xCE 0xB9 0xCC 0x88 0xCC 0x81 | |
2467 | U+03C5 U+0308 U+0301 0xCF 0x85 0xCC 0x88 0xCC 0x81 | |
2468 | ||
2469 | This means that in case-insensitive matching (or "loose matching", | |
2470 | as Unicode calls it), an EXACTF of length six (the UTF-8 encoded byte | |
2471 | length of the above casefolded versions) can match a target string | |
2472 | of length two (the byte length of UTF-8 encoded U+0390 or U+03B0). | |
2473 | This would rather mess up the minimum length computation. | |
2474 | ||
2475 | What we'll do is to look for the tail four bytes, and then peek | |
2476 | at the preceding two bytes to see whether we need to decrease | |
2477 | the minimum length by four (six minus two). | |
2478 | ||
2479 | Thanks to the design of UTF-8, there cannot be false matches: | |
2480 | A sequence of valid UTF-8 bytes cannot be a subsequence of | |
2481 | another valid sequence of UTF-8 bytes. | |
2482 | ||
2483 | */ | |
2484 | char * const s0 = STRING(scan), *s, *t; | |
2485 | char * const s1 = s0 + STR_LEN(scan) - 1; | |
2486 | char * const s2 = s1 - 4; | |
e294cc5d JH |
2487 | #ifdef EBCDIC /* RD tunifold greek 0390 and 03B0 */ |
2488 | const char t0[] = "\xaf\x49\xaf\x42"; | |
2489 | #else | |
07be1b83 | 2490 | const char t0[] = "\xcc\x88\xcc\x81"; |
e294cc5d | 2491 | #endif |
07be1b83 YO |
2492 | const char * const t1 = t0 + 3; |
2493 | ||
2494 | for (s = s0 + 2; | |
2495 | s < s2 && (t = ninstr(s, s1, t0, t1)); | |
2496 | s = t + 4) { | |
e294cc5d JH |
2497 | #ifdef EBCDIC |
2498 | if (((U8)t[-1] == 0x68 && (U8)t[-2] == 0xB4) || | |
2499 | ((U8)t[-1] == 0x46 && (U8)t[-2] == 0xB5)) | |
2500 | #else | |
07be1b83 YO |
2501 | if (((U8)t[-1] == 0xB9 && (U8)t[-2] == 0xCE) || |
2502 | ((U8)t[-1] == 0x85 && (U8)t[-2] == 0xCF)) | |
e294cc5d | 2503 | #endif |
07be1b83 YO |
2504 | *min -= 4; |
2505 | } | |
2506 | } | |
2507 | ||
2508 | #ifdef DEBUGGING | |
2509 | /* Allow dumping */ | |
2510 | n = scan + NODE_SZ_STR(scan); | |
2511 | while (n <= stop) { | |
2512 | if (PL_regkind[OP(n)] != NOTHING || OP(n) == NOTHING) { | |
2513 | OP(n) = OPTIMIZED; | |
2514 | NEXT_OFF(n) = 0; | |
2515 | } | |
2516 | n++; | |
2517 | } | |
2518 | #endif | |
2519 | DEBUG_OPTIMISE_r(if (merged){DEBUG_PEEP("finl",scan,depth)}); | |
2520 | return stopnow; | |
2521 | } | |
2522 | ||
653099ff GS |
2523 | /* REx optimizer. Converts nodes into quickier variants "in place". |
2524 | Finds fixed substrings. */ | |
2525 | ||
a0288114 | 2526 | /* Stops at toplevel WHILEM as well as at "last". At end *scanp is set |
c277df42 IZ |
2527 | to the position after last scanned or to NULL. */ |
2528 | ||
40d049e4 YO |
2529 | #define INIT_AND_WITHP \ |
2530 | assert(!and_withp); \ | |
2531 | Newx(and_withp,1,struct regnode_charclass_class); \ | |
2532 | SAVEFREEPV(and_withp) | |
07be1b83 | 2533 | |
b515a41d YO |
2534 | /* this is a chain of data about sub patterns we are processing that |
2535 | need to be handled seperately/specially in study_chunk. Its so | |
2536 | we can simulate recursion without losing state. */ | |
2537 | struct scan_frame; | |
2538 | typedef struct scan_frame { | |
2539 | regnode *last; /* last node to process in this frame */ | |
2540 | regnode *next; /* next node to process when last is reached */ | |
2541 | struct scan_frame *prev; /*previous frame*/ | |
2542 | I32 stop; /* what stopparen do we use */ | |
2543 | } scan_frame; | |
2544 | ||
304ee84b YO |
2545 | |
2546 | #define SCAN_COMMIT(s, data, m) scan_commit(s, data, m, is_inf) | |
2547 | ||
e1d1eefb YO |
2548 | #define CASE_SYNST_FNC(nAmE) \ |
2549 | case nAmE: \ | |
2550 | if (flags & SCF_DO_STCLASS_AND) { \ | |
2551 | for (value = 0; value < 256; value++) \ | |
2552 | if (!is_ ## nAmE ## _cp(value)) \ | |
2553 | ANYOF_BITMAP_CLEAR(data->start_class, value); \ | |
2554 | } \ | |
2555 | else { \ | |
2556 | for (value = 0; value < 256; value++) \ | |
2557 | if (is_ ## nAmE ## _cp(value)) \ | |
2558 | ANYOF_BITMAP_SET(data->start_class, value); \ | |
2559 | } \ | |
2560 | break; \ | |
2561 | case N ## nAmE: \ | |
2562 | if (flags & SCF_DO_STCLASS_AND) { \ | |
2563 | for (value = 0; value < 256; value++) \ | |
2564 | if (is_ ## nAmE ## _cp(value)) \ | |
2565 | ANYOF_BITMAP_CLEAR(data->start_class, value); \ | |
2566 | } \ | |
2567 | else { \ | |
2568 | for (value = 0; value < 256; value++) \ | |
2569 | if (!is_ ## nAmE ## _cp(value)) \ | |
2570 | ANYOF_BITMAP_SET(data->start_class, value); \ | |
2571 | } \ | |
2572 | break | |
2573 | ||
2574 | ||
2575 | ||
76e3520e | 2576 | STATIC I32 |
40d049e4 | 2577 | S_study_chunk(pTHX_ RExC_state_t *pRExC_state, regnode **scanp, |
1de06328 | 2578 | I32 *minlenp, I32 *deltap, |
40d049e4 YO |
2579 | regnode *last, |
2580 | scan_data_t *data, | |
2581 | I32 stopparen, | |
2582 | U8* recursed, | |
2583 | struct regnode_charclass_class *and_withp, | |
2584 | U32 flags, U32 depth) | |
c277df42 IZ |
2585 | /* scanp: Start here (read-write). */ |
2586 | /* deltap: Write maxlen-minlen here. */ | |
2587 | /* last: Stop before this one. */ | |
40d049e4 YO |
2588 | /* data: string data about the pattern */ |
2589 | /* stopparen: treat close N as END */ | |
2590 | /* recursed: which subroutines have we recursed into */ | |
2591 | /* and_withp: Valid if flags & SCF_DO_STCLASS_OR */ | |
c277df42 | 2592 | { |
97aff369 | 2593 | dVAR; |
c277df42 IZ |
2594 | I32 min = 0, pars = 0, code; |
2595 | regnode *scan = *scanp, *next; | |
2596 | I32 delta = 0; | |
2597 | int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF); | |
aca2d497 | 2598 | int is_inf_internal = 0; /* The studied chunk is infinite */ |
c277df42 IZ |
2599 | I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0; |
2600 | scan_data_t data_fake; | |
a3621e74 | 2601 | SV *re_trie_maxbuff = NULL; |
786e8c11 | 2602 | regnode *first_non_open = scan; |
e2e6a0f1 | 2603 | I32 stopmin = I32_MAX; |
8aa23a47 | 2604 | scan_frame *frame = NULL; |
a3621e74 | 2605 | GET_RE_DEBUG_FLAGS_DECL; |
8aa23a47 | 2606 | |
7918f24d NC |
2607 | PERL_ARGS_ASSERT_STUDY_CHUNK; |
2608 | ||
13a24bad | 2609 | #ifdef DEBUGGING |
40d049e4 | 2610 | StructCopy(&zero_scan_data, &data_fake, scan_data_t); |
13a24bad | 2611 | #endif |
40d049e4 | 2612 | |
786e8c11 | 2613 | if ( depth == 0 ) { |
40d049e4 | 2614 | while (first_non_open && OP(first_non_open) == OPEN) |
786e8c11 YO |
2615 | first_non_open=regnext(first_non_open); |
2616 | } | |
2617 | ||
b81d288d | 2618 | |
8aa23a47 YO |
2619 | fake_study_recurse: |
2620 | while ( scan && OP(scan) != END && scan < last ){ | |
2621 | /* Peephole optimizer: */ | |
304ee84b | 2622 | DEBUG_STUDYDATA("Peep:", data,depth); |
8aa23a47 YO |
2623 | DEBUG_PEEP("Peep",scan,depth); |
2624 | JOIN_EXACT(scan,&min,0); | |
2625 | ||
2626 | /* Follow the next-chain of the current node and optimize | |
2627 | away all the NOTHINGs from it. */ | |
2628 | if (OP(scan) != CURLYX) { | |
2629 | const int max = (reg_off_by_arg[OP(scan)] | |
2630 | ? I32_MAX | |
2631 | /* I32 may be smaller than U16 on CRAYs! */ | |
2632 | : (I32_MAX < U16_MAX ? I32_MAX : U16_MAX)); | |
2633 | int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan)); | |
2634 | int noff; | |
2635 | regnode *n = scan; | |
2636 | ||
2637 | /* Skip NOTHING and LONGJMP. */ | |
2638 | while ((n = regnext(n)) | |
2639 | && ((PL_regkind[OP(n)] == NOTHING && (noff = NEXT_OFF(n))) | |
2640 | || ((OP(n) == LONGJMP) && (noff = ARG(n)))) | |
2641 | && off + noff < max) | |
2642 | off += noff; | |
2643 | if (reg_off_by_arg[OP(scan)]) | |
2644 | ARG(scan) = off; | |
2645 | else | |
2646 | NEXT_OFF(scan) = off; | |
2647 | } | |
a3621e74 | 2648 | |
c277df42 | 2649 | |
8aa23a47 YO |
2650 | |
2651 | /* The principal pseudo-switch. Cannot be a switch, since we | |
2652 | look into several different things. */ | |
2653 | if (OP(scan) == BRANCH || OP(scan) == BRANCHJ | |
2654 | || OP(scan) == IFTHEN) { | |
2655 | next = regnext(scan); | |
2656 | code = OP(scan); | |
2657 | /* demq: the op(next)==code check is to see if we have "branch-branch" AFAICT */ | |
2658 | ||
2659 | if (OP(next) == code || code == IFTHEN) { | |
2660 | /* NOTE - There is similar code to this block below for handling | |
2661 | TRIE nodes on a re-study. If you change stuff here check there | |
2662 | too. */ | |
2663 | I32 max1 = 0, min1 = I32_MAX, num = 0; | |
2664 | struct regnode_charclass_class accum; | |
2665 | regnode * const startbranch=scan; | |
2666 | ||
2667 | if (flags & SCF_DO_SUBSTR) | |
304ee84b | 2668 | SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot merge strings after this. */ |
8aa23a47 YO |
2669 | if (flags & SCF_DO_STCLASS) |
2670 | cl_init_zero(pRExC_state, &accum); | |
2671 | ||
2672 | while (OP(scan) == code) { | |
2673 | I32 deltanext, minnext, f = 0, fake; | |
2674 | struct regnode_charclass_class this_class; | |
2675 | ||
2676 | num++; | |
2677 | data_fake.flags = 0; | |
2678 | if (data) { | |
2679 | data_fake.whilem_c = data->whilem_c; | |
2680 | data_fake.last_closep = data->last_closep; | |
2681 | } | |
2682 | else | |
2683 | data_fake.last_closep = &fake; | |
58e23c8d YO |
2684 | |
2685 | data_fake.pos_delta = delta; | |
8aa23a47 YO |
2686 | next = regnext(scan); |
2687 | scan = NEXTOPER(scan); | |
2688 | if (code != BRANCH) | |
c277df42 | 2689 | scan = NEXTOPER(scan); |
8aa23a47 YO |
2690 | if (flags & SCF_DO_STCLASS) { |
2691 | cl_init(pRExC_state, &this_class); | |
2692 | data_fake.start_class = &this_class; | |
2693 | f = SCF_DO_STCLASS_AND; | |
58e23c8d | 2694 | } |
8aa23a47 YO |
2695 | if (flags & SCF_WHILEM_VISITED_POS) |
2696 | f |= SCF_WHILEM_VISITED_POS; | |
2697 | ||
2698 | /* we suppose the run is continuous, last=next...*/ | |
2699 | minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext, | |
2700 | next, &data_fake, | |
2701 | stopparen, recursed, NULL, f,depth+1); | |
2702 | if (min1 > minnext) | |
2703 | min1 = minnext; | |
2704 | if (max1 < minnext + deltanext) | |
2705 | max1 = minnext + deltanext; | |
2706 | if (deltanext == I32_MAX) | |
2707 | is_inf = is_inf_internal = 1; | |
2708 | scan = next; | |
2709 | if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) | |
2710 | pars++; | |
2711 | if (data_fake.flags & SCF_SEEN_ACCEPT) { | |
2712 | if ( stopmin > minnext) | |
2713 | stopmin = min + min1; | |
2714 | flags &= ~SCF_DO_SUBSTR; | |
2715 | if (data) | |
2716 | data->flags |= SCF_SEEN_ACCEPT; | |
2717 | } | |
2718 | if (data) { | |
2719 | if (data_fake.flags & SF_HAS_EVAL) | |
2720 | data->flags |= SF_HAS_EVAL; | |
2721 | data->whilem_c = data_fake.whilem_c; | |
3dab1dad | 2722 | } |
8aa23a47 YO |
2723 | if (flags & SCF_DO_STCLASS) |
2724 | cl_or(pRExC_state, &accum, &this_class); | |
2725 | } | |
2726 | if (code == IFTHEN && num < 2) /* Empty ELSE branch */ | |
2727 | min1 = 0; | |
2728 | if (flags & SCF_DO_SUBSTR) { | |
2729 | data->pos_min += min1; | |
2730 | data->pos_delta += max1 - min1; | |
2731 | if (max1 != min1 || is_inf) | |
2732 | data->longest = &(data->longest_float); | |
2733 | } | |
2734 | min += min1; | |
2735 | delta += max1 - min1; | |
2736 | if (flags & SCF_DO_STCLASS_OR) { | |
2737 | cl_or(pRExC_state, data->start_class, &accum); | |
2738 | if (min1) { | |
2739 | cl_and(data->start_class, and_withp); | |
2740 | flags &= ~SCF_DO_STCLASS; | |
653099ff | 2741 | } |
8aa23a47 YO |
2742 | } |
2743 | else if (flags & SCF_DO_STCLASS_AND) { | |
2744 | if (min1) { | |
2745 | cl_and(data->start_class, &accum); | |
2746 | flags &= ~SCF_DO_STCLASS; | |
de0c8cb8 | 2747 | } |
8aa23a47 YO |
2748 | else { |
2749 | /* Switch to OR mode: cache the old value of | |
2750 | * data->start_class */ | |
2751 | INIT_AND_WITHP; | |
2752 | StructCopy(data->start_class, and_withp, | |
2753 | struct regnode_charclass_class); | |
2754 | flags &= ~SCF_DO_STCLASS_AND; | |
2755 | StructCopy(&accum, data->start_class, | |
2756 | struct regnode_charclass_class); | |
2757 | flags |= SCF_DO_STCLASS_OR; | |
2758 | data->start_class->flags |= ANYOF_EOS; | |
de0c8cb8 | 2759 | } |
8aa23a47 | 2760 | } |
a3621e74 | 2761 | |
8aa23a47 YO |
2762 | if (PERL_ENABLE_TRIE_OPTIMISATION && OP( startbranch ) == BRANCH ) { |
2763 | /* demq. | |
a3621e74 | 2764 | |
8aa23a47 YO |
2765 | Assuming this was/is a branch we are dealing with: 'scan' now |
2766 | points at the item that follows the branch sequence, whatever | |
2767 | it is. We now start at the beginning of the sequence and look | |
2768 | for subsequences of | |
a3621e74 | 2769 | |
8aa23a47 YO |
2770 | BRANCH->EXACT=>x1 |
2771 | BRANCH->EXACT=>x2 | |
2772 | tail | |
a3621e74 | 2773 | |
8aa23a47 | 2774 | which would be constructed from a pattern like /A|LIST|OF|WORDS/ |
a3621e74 | 2775 | |
8aa23a47 YO |
2776 | If we can find such a subseqence we need to turn the first |
2777 | element into a trie and then add the subsequent branch exact | |
2778 | strings to the trie. | |
a3621e74 | 2779 | |
8aa23a47 | 2780 | We have two cases |
a3621e74 | 2781 | |
3b753521 | 2782 | 1. patterns where the whole set of branches can be converted. |
a3621e74 | 2783 | |
8aa23a47 | 2784 | 2. patterns where only a subset can be converted. |
a3621e74 | 2785 | |
8aa23a47 YO |
2786 | In case 1 we can replace the whole set with a single regop |
2787 | for the trie. In case 2 we need to keep the start and end | |
3b753521 | 2788 | branches so |
a3621e74 | 2789 | |
8aa23a47 YO |
2790 | 'BRANCH EXACT; BRANCH EXACT; BRANCH X' |
2791 | becomes BRANCH TRIE; BRANCH X; | |
786e8c11 | 2792 | |
8aa23a47 YO |
2793 | There is an additional case, that being where there is a |
2794 | common prefix, which gets split out into an EXACT like node | |
2795 | preceding the TRIE node. | |
a3621e74 | 2796 | |
8aa23a47 YO |
2797 | If x(1..n)==tail then we can do a simple trie, if not we make |
2798 | a "jump" trie, such that when we match the appropriate word | |
2799 | we "jump" to the appopriate tail node. Essentailly we turn | |
2800 | a nested if into a case structure of sorts. | |
b515a41d | 2801 | |
8aa23a47 YO |
2802 | */ |
2803 | ||
2804 | int made=0; | |
2805 | if (!re_trie_maxbuff) { | |
2806 | re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1); | |
2807 | if (!SvIOK(re_trie_maxbuff)) | |
2808 | sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT); | |
2809 | } | |
2810 | if ( SvIV(re_trie_maxbuff)>=0 ) { | |
2811 | regnode *cur; | |
2812 | regnode *first = (regnode *)NULL; | |
2813 | regnode *last = (regnode *)NULL; | |
2814 | regnode *tail = scan; | |
2815 | U8 optype = 0; | |
2816 | U32 count=0; | |
a3621e74 YO |
2817 | |
2818 | #ifdef DEBUGGING | |
8aa23a47 | 2819 | SV * const mysv = sv_newmortal(); /* for dumping */ |
a3621e74 | 2820 | #endif |
8aa23a47 YO |
2821 | /* var tail is used because there may be a TAIL |
2822 | regop in the way. Ie, the exacts will point to the | |
2823 | thing following the TAIL, but the last branch will | |
2824 | point at the TAIL. So we advance tail. If we | |
2825 | have nested (?:) we may have to move through several | |
2826 | tails. | |
2827 | */ | |
2828 | ||
2829 | while ( OP( tail ) == TAIL ) { | |
2830 | /* this is the TAIL generated by (?:) */ | |
2831 | tail = regnext( tail ); | |
2832 | } | |
a3621e74 | 2833 | |
8aa23a47 YO |
2834 | |
2835 | DEBUG_OPTIMISE_r({ | |
2836 | regprop(RExC_rx, mysv, tail ); | |
2837 | PerlIO_printf( Perl_debug_log, "%*s%s%s\n", | |
2838 | (int)depth * 2 + 2, "", | |
2839 | "Looking for TRIE'able sequences. Tail node is: ", | |
2840 | SvPV_nolen_const( mysv ) | |
2841 | ); | |
2842 | }); | |
2843 | ||
2844 | /* | |
2845 | ||
2846 | step through the branches, cur represents each | |
2847 | branch, noper is the first thing to be matched | |
2848 | as part of that branch and noper_next is the | |
2849 | regnext() of that node. if noper is an EXACT | |
2850 | and noper_next is the same as scan (our current | |
2851 | position in the regex) then the EXACT branch is | |
2852 | a possible optimization target. Once we have | |
2853 | two or more consequetive such branches we can | |
2854 | create a trie of the EXACT's contents and stich | |
2855 | it in place. If the sequence represents all of | |
2856 | the branches we eliminate the whole thing and | |
2857 | replace it with a single TRIE. If it is a | |
2858 | subsequence then we need to stitch it in. This | |
2859 | means the first branch has to remain, and needs | |
2860 | to be repointed at the item on the branch chain | |
2861 | following the last branch optimized. This could | |
2862 | be either a BRANCH, in which case the | |
2863 | subsequence is internal, or it could be the | |
2864 | item following the branch sequence in which | |
2865 | case the subsequence is at the end. | |
2866 | ||
2867 | */ | |
2868 | ||
2869 | /* dont use tail as the end marker for this traverse */ | |
2870 | for ( cur = startbranch ; cur != scan ; cur = regnext( cur ) ) { | |
2871 | regnode * const noper = NEXTOPER( cur ); | |
b515a41d | 2872 | #if defined(DEBUGGING) || defined(NOJUMPTRIE) |
8aa23a47 | 2873 | regnode * const noper_next = regnext( noper ); |
b515a41d YO |
2874 | #endif |
2875 | ||
8aa23a47 YO |
2876 | DEBUG_OPTIMISE_r({ |
2877 | regprop(RExC_rx, mysv, cur); | |
2878 | PerlIO_printf( Perl_debug_log, "%*s- %s (%d)", | |
2879 | (int)depth * 2 + 2,"", SvPV_nolen_const( mysv ), REG_NODE_NUM(cur) ); | |
2880 | ||
2881 | regprop(RExC_rx, mysv, noper); | |
2882 | PerlIO_printf( Perl_debug_log, " -> %s", | |
2883 | SvPV_nolen_const(mysv)); | |
2884 | ||
2885 | if ( noper_next ) { | |
2886 | regprop(RExC_rx, mysv, noper_next ); | |
2887 | PerlIO_printf( Perl_debug_log,"\t=> %s\t", | |
2888 | SvPV_nolen_const(mysv)); | |
2889 | } | |
2890 | PerlIO_printf( Perl_debug_log, "(First==%d,Last==%d,Cur==%d)\n", | |
2891 | REG_NODE_NUM(first), REG_NODE_NUM(last), REG_NODE_NUM(cur) ); | |
2892 | }); | |
2893 | if ( (((first && optype!=NOTHING) ? OP( noper ) == optype | |
2894 | : PL_regkind[ OP( noper ) ] == EXACT ) | |
2895 | || OP(noper) == NOTHING ) | |
786e8c11 | 2896 | #ifdef NOJUMPTRIE |
8aa23a47 | 2897 | && noper_next == tail |
786e8c11 | 2898 | #endif |
8aa23a47 YO |
2899 | && count < U16_MAX) |
2900 | { | |
2901 | count++; | |
2902 | if ( !first || optype == NOTHING ) { | |
2903 | if (!first) first = cur; | |
2904 | optype = OP( noper ); | |
2905 | } else { | |
2906 | last = cur; | |
2907 | } | |
2908 | } else { | |
a0a388a1 | 2909 | /* |
0abd0d78 YO |
2910 | Currently we do not believe that the trie logic can |
2911 | handle case insensitive matching properly when the | |
2912 | pattern is not unicode (thus forcing unicode semantics). | |
2913 | ||
2914 | If/when this is fixed the following define can be swapped | |
2915 | in below to fully enable trie logic. | |
2916 | ||
a0a388a1 | 2917 | #define TRIE_TYPE_IS_SAFE 1 |
0abd0d78 YO |
2918 | |
2919 | */ | |
2920 | #define TRIE_TYPE_IS_SAFE (UTF || optype==EXACT) | |
2921 | ||
a0a388a1 | 2922 | if ( last && TRIE_TYPE_IS_SAFE ) { |
8aa23a47 YO |
2923 | make_trie( pRExC_state, |
2924 | startbranch, first, cur, tail, count, | |
2925 | optype, depth+1 ); | |
2926 | } | |
2927 | if ( PL_regkind[ OP( noper ) ] == EXACT | |
786e8c11 | 2928 | #ifdef NOJUMPTRIE |
8aa23a47 | 2929 | && noper_next == tail |
786e8c11 | 2930 | #endif |
8aa23a47 YO |
2931 | ){ |
2932 | count = 1; | |
2933 | first = cur; | |
2934 | optype = OP( noper ); | |
2935 | } else { | |
2936 | count = 0; | |
2937 | first = NULL; | |
2938 | optype = 0; | |
2939 | } | |
2940 | last = NULL; | |
2941 | } | |
2942 | } | |
2943 | DEBUG_OPTIMISE_r({ | |
2944 | regprop(RExC_rx, mysv, cur); | |
2945 | PerlIO_printf( Perl_debug_log, | |
2946 | "%*s- %s (%d) <SCAN FINISHED>\n", (int)depth * 2 + 2, | |
2947 | "", SvPV_nolen_const( mysv ),REG_NODE_NUM(cur)); | |
2948 | ||
2949 | }); | |
a0a388a1 YO |
2950 | |
2951 | if ( last && TRIE_TYPE_IS_SAFE ) { | |
8aa23a47 | 2952 | made= make_trie( pRExC_state, startbranch, first, scan, tail, count, optype, depth+1 ); |
3dab1dad | 2953 | #ifdef TRIE_STUDY_OPT |
8aa23a47 YO |
2954 | if ( ((made == MADE_EXACT_TRIE && |
2955 | startbranch == first) | |
2956 | || ( first_non_open == first )) && | |
2957 | depth==0 ) { | |
2958 | flags |= SCF_TRIE_RESTUDY; | |
2959 | if ( startbranch == first | |
2960 | && scan == tail ) | |
2961 | { | |
2962 | RExC_seen &=~REG_TOP_LEVEL_BRANCHES; | |
2963 | } | |
2964 | } | |
3dab1dad | 2965 | #endif |
8aa23a47 YO |
2966 | } |
2967 | } | |
2968 | ||
2969 | } /* do trie */ | |
2970 | ||
653099ff | 2971 | } |
8aa23a47 YO |
2972 | else if ( code == BRANCHJ ) { /* single branch is optimized. */ |
2973 | scan = NEXTOPER(NEXTOPER(scan)); | |
2974 | } else /* single branch is optimized. */ | |
2975 | scan = NEXTOPER(scan); | |
2976 | continue; | |
2977 | } else if (OP(scan) == SUSPEND || OP(scan) == GOSUB || OP(scan) == GOSTART) { | |
2978 | scan_frame *newframe = NULL; | |
2979 | I32 paren; | |
2980 | regnode *start; | |
2981 | regnode *end; | |
2982 | ||
2983 | if (OP(scan) != SUSPEND) { | |
2984 | /* set the pointer */ | |
2985 | if (OP(scan) == GOSUB) { | |
2986 | paren = ARG(scan); | |
2987 | RExC_recurse[ARG2L(scan)] = scan; | |
2988 | start = RExC_open_parens[paren-1]; | |
2989 | end = RExC_close_parens[paren-1]; | |
2990 | } else { | |
2991 | paren = 0; | |
f8fc2ecf | 2992 | start = RExC_rxi->program + 1; |
8aa23a47 YO |
2993 | end = RExC_opend; |
2994 | } | |
2995 | if (!recursed) { | |
2996 | Newxz(recursed, (((RExC_npar)>>3) +1), U8); | |
2997 | SAVEFREEPV(recursed); | |
2998 | } | |
2999 | if (!PAREN_TEST(recursed,paren+1)) { | |
3000 | PAREN_SET(recursed,paren+1); | |
3001 | Newx(newframe,1,scan_frame); | |
3002 | } else { | |
3003 | if (flags & SCF_DO_SUBSTR) { | |
304ee84b | 3004 | SCAN_COMMIT(pRExC_state,data,minlenp); |
8aa23a47 YO |
3005 | data->longest = &(data->longest_float); |
3006 | } | |
3007 | is_inf = is_inf_internal = 1; | |
3008 | if (flags & SCF_DO_STCLASS_OR) /* Allow everything */ | |
3009 | cl_anything(pRExC_state, data->start_class); | |
3010 | flags &= ~SCF_DO_STCLASS; | |
3011 | } | |
3012 | } else { | |
3013 | Newx(newframe,1,scan_frame); | |
3014 | paren = stopparen; | |
3015 | start = scan+2; | |
3016 | end = regnext(scan); | |
3017 | } | |
3018 | if (newframe) { | |
3019 | assert(start); | |
3020 | assert(end); | |
3021 | SAVEFREEPV(newframe); | |
3022 | newframe->next = regnext(scan); | |
3023 | newframe->last = last; | |
3024 | newframe->stop = stopparen; | |
3025 | newframe->prev = frame; | |
3026 | ||
3027 | frame = newframe; | |
3028 | scan = start; | |
3029 | stopparen = paren; | |
3030 | last = end; | |
3031 | ||
3032 | continue; | |
3033 | } | |
3034 | } | |
3035 | else if (OP(scan) == EXACT) { | |
3036 | I32 l = STR_LEN(scan); | |
3037 | UV uc; | |
3038 | if (UTF) { | |
3039 | const U8 * const s = (U8*)STRING(scan); | |
3040 | l = utf8_length(s, s + l); | |
3041 | uc = utf8_to_uvchr(s, NULL); | |
3042 | } else { | |
3043 | uc = *((U8*)STRING(scan)); | |
3044 | } | |
3045 | min += l; | |
3046 | if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */ | |
3047 | /* The code below prefers earlier match for fixed | |
3048 | offset, later match for variable offset. */ | |
3049 | if (data->last_end == -1) { /* Update the start info. */ | |
3050 | data->last_start_min = data->pos_min; | |
3051 | data->last_start_max = is_inf | |
3052 | ? I32_MAX : data->pos_min + data->pos_delta; | |
b515a41d | 3053 | } |
8aa23a47 YO |
3054 | sv_catpvn(data->last_found, STRING(scan), STR_LEN(scan)); |
3055 | if (UTF) | |
3056 | SvUTF8_on(data->last_found); | |
3057 | { | |
3058 | SV * const sv = data->last_found; | |
3059 | MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? | |
3060 | mg_find(sv, PERL_MAGIC_utf8) : NULL; | |
3061 | if (mg && mg->mg_len >= 0) | |
3062 | mg->mg_len += utf8_length((U8*)STRING(scan), | |
3063 | (U8*)STRING(scan)+STR_LEN(scan)); | |
b515a41d | 3064 | } |
8aa23a47 YO |
3065 | data->last_end = data->pos_min + l; |
3066 | data->pos_min += l; /* As in the first entry. */ | |
3067 | data->flags &= ~SF_BEFORE_EOL; | |
3068 | } | |
3069 | if (flags & SCF_DO_STCLASS_AND) { | |
3070 | /* Check whether it is compatible with what we know already! */ | |
3071 | int compat = 1; | |
3072 | ||
3073 | if (uc >= 0x100 || | |
3074 | (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE)) | |
3075 | && !ANYOF_BITMAP_TEST(data->start_class, uc) | |
3076 | && (!(data->start_class->flags & ANYOF_FOLD) | |
3077 | || !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc]))) | |
3078 | ) | |
3079 | compat = 0; | |
3080 | ANYOF_CLASS_ZERO(data->start_class); | |
3081 | ANYOF_BITMAP_ZERO(data->start_class); | |
3082 | if (compat) | |
3083 | ANYOF_BITMAP_SET(data->start_class, uc); | |
3084 | data->start_class->flags &= ~ANYOF_EOS; | |
3085 | if (uc < 0x100) | |
3086 | data->start_class->flags &= ~ANYOF_UNICODE_ALL; | |
3087 | } | |
3088 | else if (flags & SCF_DO_STCLASS_OR) { | |
3089 | /* false positive possible if the class is case-folded */ | |
3090 | if (uc < 0x100) | |
3091 | ANYOF_BITMAP_SET(data->start_class, uc); | |
3092 | else | |
3093 | data->start_class->flags |= ANYOF_UNICODE_ALL; | |
3094 | data->start_class->flags &= ~ANYOF_EOS; | |
3095 | cl_and(data->start_class, and_withp); | |
3096 | } | |
3097 | flags &= ~SCF_DO_STCLASS; | |
3098 | } | |
3099 | else if (PL_regkind[OP(scan)] == EXACT) { /* But OP != EXACT! */ | |
3100 | I32 l = STR_LEN(scan); | |
3101 | UV uc = *((U8*)STRING(scan)); | |
3102 | ||
3103 | /* Search for fixed substrings supports EXACT only. */ | |
3104 | if (flags & SCF_DO_SUBSTR) { | |
3105 | assert(data); | |
304ee84b | 3106 | SCAN_COMMIT(pRExC_state, data, minlenp); |
8aa23a47 YO |
3107 | } |
3108 | if (UTF) { | |
3109 | const U8 * const s = (U8 *)STRING(scan); | |
3110 | l = utf8_length(s, s + l); | |
3111 | uc = utf8_to_uvchr(s, NULL); | |
3112 | } | |
3113 | min += l; | |
3114 | if (flags & SCF_DO_SUBSTR) | |
3115 | data->pos_min += l; | |
3116 | if (flags & SCF_DO_STCLASS_AND) { | |
3117 | /* Check whether it is compatible with what we know already! */ | |
3118 | int compat = 1; | |
3119 | ||
3120 | if (uc >= 0x100 || | |
3121 | (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE)) | |
3122 | && !ANYOF_BITMAP_TEST(data->start_class, uc) | |
3123 | && !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc]))) | |
3124 | compat = 0; | |
3125 | ANYOF_CLASS_ZERO(data->start_class); | |
3126 | ANYOF_BITMAP_ZERO(data->start_class); | |
3127 | if (compat) { | |
3128 | ANYOF_BITMAP_SET(data->start_class, uc); | |
653099ff | 3129 | data->start_class->flags &= ~ANYOF_EOS; |
8aa23a47 YO |
3130 | data->start_class->flags |= ANYOF_FOLD; |
3131 | if (OP(scan) == EXACTFL) | |
3132 | data->start_class->flags |= ANYOF_LOCALE; | |
653099ff | 3133 | } |
8aa23a47 YO |
3134 | } |
3135 | else if (flags & SCF_DO_STCLASS_OR) { | |
3136 | if (data->start_class->flags & ANYOF_FOLD) { | |
3137 | /* false positive possible if the class is case-folded. | |
3138 | Assume that the locale settings are the same... */ | |
1aa99e6b IH |
3139 | if (uc < 0x100) |
3140 | ANYOF_BITMAP_SET(data->start_class, uc); | |
653099ff GS |
3141 | data->start_class->flags &= ~ANYOF_EOS; |
3142 | } | |
8aa23a47 | 3143 | cl_and(data->start_class, and_withp); |
653099ff | 3144 | } |
8aa23a47 YO |
3145 | flags &= ~SCF_DO_STCLASS; |
3146 | } | |
e52fc539 | 3147 | else if (REGNODE_VARIES(OP(scan))) { |
8aa23a47 YO |
3148 | I32 mincount, maxcount, minnext, deltanext, fl = 0; |
3149 | I32 f = flags, pos_before = 0; | |
3150 | regnode * const oscan = scan; | |
3151 | struct regnode_charclass_class this_class; | |
3152 | struct regnode_charclass_class *oclass = NULL; | |
3153 | I32 next_is_eval = 0; | |
3154 | ||
3155 | switch (PL_regkind[OP(scan)]) { | |
3156 | case WHILEM: /* End of (?:...)* . */ | |
3157 | scan = NEXTOPER(scan); | |
3158 | goto finish; | |
3159 | case PLUS: | |
3160 | if (flags & (SCF_DO_SUBSTR | SCF_DO_STCLASS)) { | |
3161 | next = NEXTOPER(scan); | |
3162 | if (OP(next) == EXACT || (flags & SCF_DO_STCLASS)) { | |
3163 | mincount = 1; | |
3164 | maxcount = REG_INFTY; | |
3165 | next = regnext(scan); | |
3166 | scan = NEXTOPER(scan); | |
3167 | goto do_curly; | |
3168 | } | |
3169 | } | |
3170 | if (flags & SCF_DO_SUBSTR) | |
3171 | data->pos_min++; | |
3172 | min++; | |
3173 | /* Fall through. */ | |
3174 | case STAR: | |
3175 | if (flags & SCF_DO_STCLASS) { | |
3176 | mincount = 0; | |
3177 | maxcount = REG_INFTY; | |
3178 | next = regnext(scan); | |
3179 | scan = NEXTOPER(scan); | |
3180 | goto do_curly; | |
3181 | } | |
3182 | is_inf = is_inf_internal = 1; | |
3183 | scan = regnext(scan); | |
c277df42 | 3184 | if (flags & SCF_DO_SUBSTR) { |
304ee84b | 3185 | SCAN_COMMIT(pRExC_state, data, minlenp); /* Cannot extend fixed substrings */ |
8aa23a47 | 3186 | data->longest = &(data->longest_float); |
c277df42 | 3187 | } |
8aa23a47 YO |
3188 | goto optimize_curly_tail; |
3189 | case CURLY: | |
3190 | if (stopparen>0 && (OP(scan)==CURLYN || OP(scan)==CURLYM) | |
3191 | && (scan->flags == stopparen)) | |
3192 | { | |
3193 | mincount = 1; | |
3194 | maxcount = 1; | |
3195 | } else { | |
3196 | mincount = ARG1(scan); | |
3197 | maxcount = ARG2(scan); | |
653099ff | 3198 | } |
8aa23a47 YO |
3199 | next = regnext(scan); |
3200 | if (OP(scan) == CURLYX) { | |
3201 | I32 lp = (data ? *(data->last_closep) : 0); | |
3202 | scan->flags = ((lp <= (I32)U8_MAX) ? (U8)lp : U8_MAX); | |
653099ff | 3203 | } |
8aa23a47 YO |
3204 | scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS; |
3205 | next_is_eval = (OP(scan) == EVAL); | |
3206 | do_curly: | |
3207 | if (flags & SCF_DO_SUBSTR) { | |
304ee84b | 3208 | if (mincount == 0) SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot extend fixed substrings */ |
8aa23a47 | 3209 | pos_before = data->pos_min; |
b45f050a | 3210 | } |
8aa23a47 YO |
3211 | if (data) { |
3212 | fl = data->flags; | |
3213 | data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL); | |
3214 | if (is_inf) | |
3215 | data->flags |= SF_IS_INF; | |
3216 | } | |
3217 | if (flags & SCF_DO_STCLASS) { | |
3218 | cl_init(pRExC_state, &this_class); | |
3219 | oclass = data->start_class; | |
3220 | data->start_class = &this_class; | |
3221 | f |= SCF_DO_STCLASS_AND; | |
3222 | f &= ~SCF_DO_STCLASS_OR; | |
3223 | } | |
3224 | /* These are the cases when once a subexpression | |
3225 | fails at a particular position, it cannot succeed | |
3226 | even after backtracking at the enclosing scope. | |
b9a59e08 | 3227 | |
8aa23a47 YO |
3228 | XXXX what if minimal match and we are at the |
3229 | initial run of {n,m}? */ | |
3230 | if ((mincount != maxcount - 1) && (maxcount != REG_INFTY)) | |
3231 | f &= ~SCF_WHILEM_VISITED_POS; | |
b45f050a | 3232 | |
8aa23a47 YO |
3233 | /* This will finish on WHILEM, setting scan, or on NULL: */ |
3234 | minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext, | |
3235 | last, data, stopparen, recursed, NULL, | |
3236 | (mincount == 0 | |
3237 | ? (f & ~SCF_DO_SUBSTR) : f),depth+1); | |
b515a41d | 3238 | |
8aa23a47 YO |
3239 | if (flags & SCF_DO_STCLASS) |
3240 | data->start_class = oclass; | |
3241 | if (mincount == 0 || minnext == 0) { | |
3242 | if (flags & SCF_DO_STCLASS_OR) { | |
3243 | cl_or(pRExC_state, data->start_class, &this_class); | |
3244 | } | |
3245 | else if (flags & SCF_DO_STCLASS_AND) { | |
3246 | /* Switch to OR mode: cache the old value of | |
3247 | * data->start_class */ | |
3248 | INIT_AND_WITHP; | |
3249 | StructCopy(data->start_class, and_withp, | |
3250 | struct regnode_charclass_class); | |
3251 | flags &= ~SCF_DO_STCLASS_AND; | |
3252 | StructCopy(&this_class, data->start_class, | |
3253 | struct regnode_charclass_class); | |
3254 | flags |= SCF_DO_STCLASS_OR; | |
3255 | data->start_class->flags |= ANYOF_EOS; | |
3256 | } | |
3257 | } else { /* Non-zero len */ | |
3258 | if (flags & SCF_DO_STCLASS_OR) { | |
3259 | cl_or(pRExC_state, data->start_class, &this_class); | |
3260 | cl_and(data->start_class, and_withp); | |
3261 | } | |
3262 | else if (flags & SCF_DO_STCLASS_AND) | |
3263 | cl_and(data->start_class, &this_class); | |
3264 | flags &= ~SCF_DO_STCLASS; | |
3265 | } | |
3266 | if (!scan) /* It was not CURLYX, but CURLY. */ | |
3267 | scan = next; | |
3268 | if ( /* ? quantifier ok, except for (?{ ... }) */ | |
3269 | (next_is_eval || !(mincount == 0 && maxcount == 1)) | |
3270 | && (minnext == 0) && (deltanext == 0) | |
3271 | && data && !(data->flags & (SF_HAS_PAR|SF_IN_PAR)) | |
668c081a | 3272 | && maxcount <= REG_INFTY/3) /* Complement check for big count */ |
8aa23a47 | 3273 | { |
668c081a NC |
3274 | ckWARNreg(RExC_parse, |
3275 | "Quantifier unexpected on zero-length expression"); | |
8aa23a47 YO |
3276 | } |
3277 | ||
3278 | min += minnext * mincount; | |
3279 | is_inf_internal |= ((maxcount == REG_INFTY | |
3280 | && (minnext + deltanext) > 0) | |
3281 | || deltanext == I32_MAX); | |
3282 | is_inf |= is_inf_internal; | |
3283 | delta += (minnext + deltanext) * maxcount - minnext * mincount; | |
3284 | ||
3285 | /* Try powerful optimization CURLYX => CURLYN. */ | |
3286 | if ( OP(oscan) == CURLYX && data | |
3287 | && data->flags & SF_IN_PAR | |
3288 | && !(data->flags & SF_HAS_EVAL) | |
3289 | && !deltanext && minnext == 1 ) { | |
3290 | /* Try to optimize to CURLYN. */ | |
3291 | regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; | |
3292 | regnode * const nxt1 = nxt; | |
497b47a8 | 3293 | #ifdef DEBUGGING |
8aa23a47 | 3294 | regnode *nxt2; |
497b47a8 | 3295 | #endif |
c277df42 | 3296 | |
8aa23a47 YO |
3297 | /* Skip open. */ |
3298 | nxt = regnext(nxt); | |
e52fc539 | 3299 | if (!REGNODE_SIMPLE(OP(nxt)) |
8aa23a47 YO |
3300 | && !(PL_regkind[OP(nxt)] == EXACT |
3301 | && STR_LEN(nxt) == 1)) | |
3302 | goto nogo; | |
497b47a8 | 3303 | #ifdef DEBUGGING |
8aa23a47 | 3304 | nxt2 = nxt; |
497b47a8 | 3305 | #endif |
8aa23a47 YO |
3306 | nxt = regnext(nxt); |
3307 | if (OP(nxt) != CLOSE) | |
3308 | goto nogo; | |
3309 | if (RExC_open_parens) { | |
3310 | RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/ | |
3311 | RExC_close_parens[ARG(nxt1)-1]=nxt+2; /*close->while*/ | |
3312 | } | |
3313 | /* Now we know that nxt2 is the only contents: */ | |
3314 | oscan->flags = (U8)ARG(nxt); | |
3315 | OP(oscan) = CURLYN; | |
3316 | OP(nxt1) = NOTHING; /* was OPEN. */ | |
40d049e4 | 3317 | |
c277df42 | 3318 | #ifdef DEBUGGING |
8aa23a47 | 3319 | OP(nxt1 + 1) = OPTIMIZED; /* was count. */ |
fda99bee KW |
3320 | NEXT_OFF(nxt1+ 1) = 0; /* just for consistency. */ |
3321 | NEXT_OFF(nxt2) = 0; /* just for consistency with CURLY. */ | |
8aa23a47 YO |
3322 | OP(nxt) = OPTIMIZED; /* was CLOSE. */ |
3323 | OP(nxt + 1) = OPTIMIZED; /* was count. */ | |
fda99bee | 3324 | NEXT_OFF(nxt+ 1) = 0; /* just for consistency. */ |
b81d288d | 3325 | #endif |
8aa23a47 YO |
3326 | } |
3327 | nogo: | |
3328 | ||
3329 | /* Try optimization CURLYX => CURLYM. */ | |
3330 | if ( OP(oscan) == CURLYX && data | |
3331 | && !(data->flags & SF_HAS_PAR) | |
3332 | && !(data->flags & SF_HAS_EVAL) | |
3333 | && !deltanext /* atom is fixed width */ | |
3334 | && minnext != 0 /* CURLYM can't handle zero width */ | |
3335 | ) { | |
3336 | /* XXXX How to optimize if data == 0? */ | |
3337 | /* Optimize to a simpler form. */ | |
3338 | regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN */ | |
3339 | regnode *nxt2; | |
3340 | ||
3341 | OP(oscan) = CURLYM; | |
3342 | while ( (nxt2 = regnext(nxt)) /* skip over embedded stuff*/ | |
3343 | && (OP(nxt2) != WHILEM)) | |
3344 | nxt = nxt2; | |
3345 | OP(nxt2) = SUCCEED; /* Whas WHILEM */ | |
3346 | /* Need to optimize away parenths. */ | |
b3c0965f | 3347 | if ((data->flags & SF_IN_PAR) && OP(nxt) == CLOSE) { |
8aa23a47 YO |
3348 | /* Set the parenth number. */ |
3349 | regnode *nxt1 = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN*/ | |
3350 | ||
8aa23a47 YO |
3351 | oscan->flags = (U8)ARG(nxt); |
3352 | if (RExC_open_parens) { | |
3353 | RExC_open_parens[ARG(nxt1)-1]=oscan; /*open->CURLYM*/ | |
3354 | RExC_close_parens[ARG(nxt1)-1]=nxt2+1; /*close->NOTHING*/ | |
40d049e4 | 3355 | } |
8aa23a47 YO |
3356 | OP(nxt1) = OPTIMIZED; /* was OPEN. */ |
3357 | OP(nxt) = OPTIMIZED; /* was CLOSE. */ | |
40d049e4 | 3358 | |
c277df42 | 3359 | #ifdef DEBUGGING |
8aa23a47 YO |
3360 | OP(nxt1 + 1) = OPTIMIZED; /* was count. */ |
3361 | OP(nxt + 1) = OPTIMIZED; /* was count. */ | |
3362 | NEXT_OFF(nxt1 + 1) = 0; /* just for consistancy. */ | |
3363 | NEXT_OFF(nxt + 1) = 0; /* just for consistancy. */ | |
b81d288d | 3364 | #endif |
c277df42 | 3365 | #if 0 |
8aa23a47 YO |
3366 | while ( nxt1 && (OP(nxt1) != WHILEM)) { |
3367 | regnode *nnxt = regnext(nxt1); | |
8aa23a47 YO |
3368 | if (nnxt == nxt) { |
3369 | if (reg_off_by_arg[OP(nxt1)]) | |
3370 | ARG_SET(nxt1, nxt2 - nxt1); | |
3371 | else if (nxt2 - nxt1 < U16_MAX) | |
3372 | NEXT_OFF(nxt1) = nxt2 - nxt1; | |
3373 | else | |
3374 | OP(nxt) = NOTHING; /* Cannot beautify */ | |
c277df42 | 3375 | } |
8aa23a47 | 3376 | nxt1 = nnxt; |
c277df42 | 3377 | } |
5d1c421c | 3378 | #endif |
8aa23a47 YO |
3379 | /* Optimize again: */ |
3380 | study_chunk(pRExC_state, &nxt1, minlenp, &deltanext, nxt, | |
3381 | NULL, stopparen, recursed, NULL, 0,depth+1); | |
3382 | } | |
3383 | else | |
3384 | oscan->flags = 0; | |
3385 | } | |
3386 | else if ((OP(oscan) == CURLYX) | |
3387 | && (flags & SCF_WHILEM_VISITED_POS) | |
3388 | /* See the comment on a similar expression above. | |
3b753521 | 3389 | However, this time it's not a subexpression |
8aa23a47 YO |
3390 | we care about, but the expression itself. */ |
3391 | && (maxcount == REG_INFTY) | |
3392 | && data && ++data->whilem_c < 16) { | |
3393 | /* This stays as CURLYX, we can put the count/of pair. */ | |
3394 | /* Find WHILEM (as in regexec.c) */ | |
3395 | regnode *nxt = oscan + NEXT_OFF(oscan); | |
3396 | ||
3397 | if (OP(PREVOPER(nxt)) == NOTHING) /* LONGJMP */ | |
3398 | nxt += ARG(nxt); | |
3399 | PREVOPER(nxt)->flags = (U8)(data->whilem_c | |
3400 | | (RExC_whilem_seen << 4)); /* On WHILEM */ | |
3401 | } | |
3402 | if (data && fl & (SF_HAS_PAR|SF_IN_PAR)) | |
3403 | pars++; | |
3404 | if (flags & SCF_DO_SUBSTR) { | |
3405 | SV *last_str = NULL; | |
3406 | int counted = mincount != 0; | |
a0ed51b3 | 3407 | |
8aa23a47 YO |
3408 | if (data->last_end > 0 && mincount != 0) { /* Ends with a string. */ |
3409 | #if defined(SPARC64_GCC_WORKAROUND) | |
3410 | I32 b = 0; | |
3411 | STRLEN l = 0; | |
3412 | const char *s = NULL; | |
3413 | I32 old = 0; | |
b515a41d | 3414 | |
8aa23a47 YO |
3415 | if (pos_before >= data->last_start_min) |
3416 | b = pos_before; | |
3417 | else | |
3418 | b = data->last_start_min; | |
b515a41d | 3419 | |
8aa23a47 YO |
3420 | l = 0; |
3421 | s = SvPV_const(data->last_found, l); | |
3422 | old = b - data->last_start_min; | |
3423 | ||
3424 | #else | |
3425 | I32 b = pos_before >= data->last_start_min | |
3426 | ? pos_before : data->last_start_min; | |
3427 | STRLEN l; | |
3428 | const char * const s = SvPV_const(data->last_found, l); | |
3429 | I32 old = b - data->last_start_min; | |
3430 | #endif | |
3431 | ||
3432 | if (UTF) | |
3433 | old = utf8_hop((U8*)s, old) - (U8*)s; | |
8aa23a47 YO |
3434 | l -= old; |
3435 | /* Get the added string: */ | |
740cce10 | 3436 | last_str = newSVpvn_utf8(s + old, l, UTF); |
8aa23a47 YO |
3437 | if (deltanext == 0 && pos_before == b) { |
3438 | /* What was added is a constant string */ | |
3439 | if (mincount > 1) { | |
3440 | SvGROW(last_str, (mincount * l) + 1); | |
3441 | repeatcpy(SvPVX(last_str) + l, | |
3442 | SvPVX_const(last_str), l, mincount - 1); | |
3443 | SvCUR_set(last_str, SvCUR(last_str) * mincount); | |
3444 | /* Add additional parts. */ | |
3445 | SvCUR_set(data->last_found, | |
3446 | SvCUR(data->last_found) - l); | |
3447 | sv_catsv(data->last_found, last_str); | |
3448 | { | |
3449 | SV * sv = data->last_found; | |
3450 | MAGIC *mg = | |
3451 | SvUTF8(sv) && SvMAGICAL(sv) ? | |
3452 | mg_find(sv, PERL_MAGIC_utf8) : NULL; | |
3453 | if (mg && mg->mg_len >= 0) | |
bd94e887 | 3454 | mg->mg_len += CHR_SVLEN(last_str) - l; |
b515a41d | 3455 | } |
8aa23a47 | 3456 | data->last_end += l * (mincount - 1); |
b515a41d | 3457 | } |
8aa23a47 YO |
3458 | } else { |
3459 | /* start offset must point into the last copy */ | |
3460 | data->last_start_min += minnext * (mincount - 1); | |
3461 | data->last_start_max += is_inf ? I32_MAX | |
3462 | : (maxcount - 1) * (minnext + data->pos_delta); | |
3463 | } | |
c277df42 | 3464 | } |
8aa23a47 YO |
3465 | /* It is counted once already... */ |
3466 | data->pos_min += minnext * (mincount - counted); | |
3467 | data->pos_delta += - counted * deltanext + | |
3468 | (minnext + deltanext) * maxcount - minnext * mincount; | |
3469 | if (mincount != maxcount) { | |
3470 | /* Cannot extend fixed substrings found inside | |
3471 | the group. */ | |
304ee84b | 3472 | SCAN_COMMIT(pRExC_state,data,minlenp); |
8aa23a47 YO |
3473 | if (mincount && last_str) { |
3474 | SV * const sv = data->last_found; | |
3475 | MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? | |
3476 | mg_find(sv, PERL_MAGIC_utf8) : NULL; | |
3477 | ||
3478 | if (mg) | |
3479 | mg->mg_len = -1; | |
3480 | sv_setsv(sv, last_str); | |
3481 | data->last_end = data->pos_min; | |
3482 | data->last_start_min = | |
3483 | data->pos_min - CHR_SVLEN(last_str); | |
3484 | data->last_start_max = is_inf | |
3485 | ? I32_MAX | |
3486 | : data->pos_min + data->pos_delta | |
3487 | - CHR_SVLEN(last_str); | |
3488 | } | |
3489 | data->longest = &(data->longest_float); | |
3490 | } | |
3491 | SvREFCNT_dec(last_str); | |
c277df42 | 3492 | } |
8aa23a47 YO |
3493 | if (data && (fl & SF_HAS_EVAL)) |
3494 | data->flags |= SF_HAS_EVAL; | |
3495 | optimize_curly_tail: | |
3496 | if (OP(oscan) != CURLYX) { | |
3497 | while (PL_regkind[OP(next = regnext(oscan))] == NOTHING | |
3498 | && NEXT_OFF(next)) | |
3499 | NEXT_OFF(oscan) += NEXT_OFF(next); | |
3500 | } | |
3501 | continue; | |
3502 | default: /* REF and CLUMP only? */ | |
3503 | if (flags & SCF_DO_SUBSTR) { | |
304ee84b | 3504 | SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */ |
8aa23a47 YO |
3505 | data->longest = &(data->longest_float); |
3506 | } | |
3507 | is_inf = is_inf_internal = 1; | |
3508 | if (flags & SCF_DO_STCLASS_OR) | |
3509 | cl_anything(pRExC_state, data->start_class); | |
3510 | flags &= ~SCF_DO_STCLASS; | |
3511 | break; | |
c277df42 | 3512 | } |
8aa23a47 | 3513 | } |
e1d1eefb YO |
3514 | else if (OP(scan) == LNBREAK) { |
3515 | if (flags & SCF_DO_STCLASS) { | |
3516 | int value = 0; | |
3517 | data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */ | |
3518 | if (flags & SCF_DO_STCLASS_AND) { | |
3519 | for (value = 0; value < 256; value++) | |
e64b1bd1 | 3520 | if (!is_VERTWS_cp(value)) |
b9a59e08 KW |
3521 | ANYOF_BITMAP_CLEAR(data->start_class, value); |
3522 | } | |
3523 | else { | |
e1d1eefb | 3524 | for (value = 0; value < 256; value++) |
e64b1bd1 | 3525 | if (is_VERTWS_cp(value)) |
b9a59e08 KW |
3526 | ANYOF_BITMAP_SET(data->start_class, value); |
3527 | } | |
e1d1eefb YO |
3528 | if (flags & SCF_DO_STCLASS_OR) |
3529 | cl_and(data->start_class, and_withp); | |
3530 | flags &= ~SCF_DO_STCLASS; | |
3531 | } | |
3532 | min += 1; | |
f9a79580 | 3533 | delta += 1; |
e1d1eefb YO |
3534 | if (flags & SCF_DO_SUBSTR) { |
3535 | SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */ | |
3536 | data->pos_min += 1; | |
f9a79580 | 3537 | data->pos_delta += 1; |
e1d1eefb YO |
3538 | data->longest = &(data->longest_float); |
3539 | } | |
e1d1eefb | 3540 | } |
f9a79580 RGS |
3541 | else if (OP(scan) == FOLDCHAR) { |
3542 | int d = ARG(scan)==0xDF ? 1 : 2; | |
3543 | flags &= ~SCF_DO_STCLASS; | |
3544 | min += 1; | |
3545 | delta += d; | |
3546 | if (flags & SCF_DO_SUBSTR) { | |
3547 | SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */ | |
3548 | data->pos_min += 1; | |
3549 | data->pos_delta += d; | |
3550 | data->longest = &(data->longest_float); | |
3551 | } | |
3552 | } | |
e52fc539 | 3553 | else if (REGNODE_SIMPLE(OP(scan))) { |
8aa23a47 | 3554 | int value = 0; |
653099ff | 3555 | |
8aa23a47 | 3556 | if (flags & SCF_DO_SUBSTR) { |
304ee84b | 3557 | SCAN_COMMIT(pRExC_state,data,minlenp); |
8aa23a47 YO |
3558 | data->pos_min++; |
3559 | } | |
3560 | min++; | |
3561 | if (flags & SCF_DO_STCLASS) { | |
3562 | data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */ | |
b515a41d | 3563 | |
8aa23a47 YO |
3564 | /* Some of the logic below assumes that switching |
3565 | locale on will only add false positives. */ | |
3566 | switch (PL_regkind[OP(scan)]) { | |
3567 | case SANY: | |
3568 | default: | |
3569 | do_default: | |
3570 | /* Perl_croak(aTHX_ "panic: unexpected simple REx opcode %d", OP(scan)); */ | |
3571 | if (flags & SCF_DO_STCLASS_OR) /* Allow everything */ | |
3572 | cl_anything(pRExC_state, data->start_class); | |
3573 | break; | |
3574 | case REG_ANY: | |
3575 | if (OP(scan) == SANY) | |
3576 | goto do_default; | |
3577 | if (flags & SCF_DO_STCLASS_OR) { /* Everything but \n */ | |
3578 | value = (ANYOF_BITMAP_TEST(data->start_class,'\n') | |
cefafd73 KW |
3579 | || ((data->start_class->flags & ANYOF_CLASS) |
3580 | && ANYOF_CLASS_TEST_ANY_SET(data->start_class))); | |
8aa23a47 | 3581 | cl_anything(pRExC_state, data->start_class); |
653099ff | 3582 | } |
8aa23a47 YO |
3583 | if (flags & SCF_DO_STCLASS_AND || !value) |
3584 | ANYOF_BITMAP_CLEAR(data->start_class,'\n'); | |
3585 | break; | |
3586 | case ANYOF: | |
3587 | if (flags & SCF_DO_STCLASS_AND) | |
3588 | cl_and(data->start_class, | |
3589 | (struct regnode_charclass_class*)scan); | |
653099ff | 3590 | else |
8aa23a47 YO |
3591 | cl_or(pRExC_state, data->start_class, |
3592 | (struct regnode_charclass_class*)scan); | |
3593 | break; | |
3594 | case ALNUM: | |
3595 | if (flags & SCF_DO_STCLASS_AND) { | |
3596 | if (!(data->start_class->flags & ANYOF_LOCALE)) { | |
3597 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM); | |
a12cf05f KW |
3598 | if (FLAGS(scan) & USE_UNI) { |
3599 | for (value = 0; value < 256; value++) { | |
3600 | if (!isWORDCHAR_L1(value)) { | |
3601 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3602 | } | |
3603 | } | |
3604 | } else { | |
3605 | for (value = 0; value < 256; value++) { | |
3606 | if (!isALNUM(value)) { | |
3607 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3608 | } | |
3609 | } | |
3610 | } | |
8aa23a47 | 3611 | } |
653099ff | 3612 | } |
8aa23a47 YO |
3613 | else { |
3614 | if (data->start_class->flags & ANYOF_LOCALE) | |
3615 | ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM); | |
a12cf05f KW |
3616 | else if (FLAGS(scan) & USE_UNI) { |
3617 | for (value = 0; value < 256; value++) { | |
3618 | if (isWORDCHAR_L1(value)) { | |
3619 | ANYOF_BITMAP_SET(data->start_class, value); | |
3620 | } | |
3621 | } | |
3622 | } else { | |
3623 | for (value = 0; value < 256; value++) { | |
3624 | if (isALNUM(value)) { | |
3625 | ANYOF_BITMAP_SET(data->start_class, value); | |
3626 | } | |
3627 | } | |
3628 | } | |
8aa23a47 YO |
3629 | } |
3630 | break; | |
3631 | case ALNUML: | |
3632 | if (flags & SCF_DO_STCLASS_AND) { | |
3633 | if (data->start_class->flags & ANYOF_LOCALE) | |
3634 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM); | |
3635 | } | |
3636 | else { | |
3637 | ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM); | |
3638 | data->start_class->flags |= ANYOF_LOCALE; | |
3639 | } | |
3640 | break; | |
3641 | case NALNUM: | |
3642 | if (flags & SCF_DO_STCLASS_AND) { | |
3643 | if (!(data->start_class->flags & ANYOF_LOCALE)) { | |
3644 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM); | |
a12cf05f KW |
3645 | if (FLAGS(scan) & USE_UNI) { |
3646 | for (value = 0; value < 256; value++) { | |
3647 | if (isWORDCHAR_L1(value)) { | |
3648 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3649 | } | |
3650 | } | |
3651 | } else { | |
3652 | for (value = 0; value < 256; value++) { | |
3653 | if (isALNUM(value)) { | |
3654 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3655 | } | |
3656 | } | |
3657 | } | |
653099ff GS |
3658 | } |
3659 | } | |
8aa23a47 YO |
3660 | else { |
3661 | if (data->start_class->flags & ANYOF_LOCALE) | |
3662 | ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM); | |
3663 | else { | |
3664 | for (value = 0; value < 256; value++) | |
3665 | if (!isALNUM(value)) | |
b9a59e08 | 3666 | ANYOF_BITMAP_SET(data->start_class, value); |
8aa23a47 | 3667 | } |
653099ff | 3668 | } |
8aa23a47 YO |
3669 | break; |
3670 | case NALNUML: | |
3671 | if (flags & SCF_DO_STCLASS_AND) { | |
3672 | if (data->start_class->flags & ANYOF_LOCALE) | |
3673 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM); | |
653099ff | 3674 | } |
8aa23a47 YO |
3675 | else { |
3676 | data->start_class->flags |= ANYOF_LOCALE; | |
3677 | ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM); | |
3678 | } | |
3679 | break; | |
3680 | case SPACE: | |
3681 | if (flags & SCF_DO_STCLASS_AND) { | |
3682 | if (!(data->start_class->flags & ANYOF_LOCALE)) { | |
3683 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE); | |
a12cf05f KW |
3684 | if (FLAGS(scan) & USE_UNI) { |
3685 | for (value = 0; value < 256; value++) { | |
3686 | if (!isSPACE_L1(value)) { | |
3687 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3688 | } | |
3689 | } | |
3690 | } else { | |
3691 | for (value = 0; value < 256; value++) { | |
3692 | if (!isSPACE(value)) { | |
3693 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3694 | } | |
3695 | } | |
3696 | } | |
653099ff GS |
3697 | } |
3698 | } | |
8aa23a47 | 3699 | else { |
a12cf05f | 3700 | if (data->start_class->flags & ANYOF_LOCALE) { |
8aa23a47 | 3701 | ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE); |
a12cf05f KW |
3702 | } |
3703 | else if (FLAGS(scan) & USE_UNI) { | |
3704 | for (value = 0; value < 256; value++) { | |
3705 | if (isSPACE_L1(value)) { | |
3706 | ANYOF_BITMAP_SET(data->start_class, value); | |
3707 | } | |
3708 | } | |
3709 | } else { | |
3710 | for (value = 0; value < 256; value++) { | |
3711 | if (isSPACE(value)) { | |
3712 | ANYOF_BITMAP_SET(data->start_class, value); | |
3713 | } | |
3714 | } | |
8aa23a47 | 3715 | } |
653099ff | 3716 | } |
8aa23a47 YO |
3717 | break; |
3718 | case SPACEL: | |
3719 | if (flags & SCF_DO_STCLASS_AND) { | |
3720 | if (data->start_class->flags & ANYOF_LOCALE) | |
3721 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE); | |
3722 | } | |
3723 | else { | |
3724 | data->start_class->flags |= ANYOF_LOCALE; | |
3725 | ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE); | |
3726 | } | |
3727 | break; | |
3728 | case NSPACE: | |
3729 | if (flags & SCF_DO_STCLASS_AND) { | |
3730 | if (!(data->start_class->flags & ANYOF_LOCALE)) { | |
3731 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE); | |
a12cf05f KW |
3732 | if (FLAGS(scan) & USE_UNI) { |
3733 | for (value = 0; value < 256; value++) { | |
3734 | if (isSPACE_L1(value)) { | |
3735 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3736 | } | |
3737 | } | |
3738 | } else { | |
3739 | for (value = 0; value < 256; value++) { | |
3740 | if (isSPACE(value)) { | |
3741 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3742 | } | |
3743 | } | |
3744 | } | |
653099ff | 3745 | } |
8aa23a47 YO |
3746 | } |
3747 | else { | |
3748 | if (data->start_class->flags & ANYOF_LOCALE) | |
3749 | ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE); | |
a12cf05f KW |
3750 | else if (FLAGS(scan) & USE_UNI) { |
3751 | for (value = 0; value < 256; value++) { | |
3752 | if (!isSPACE_L1(value)) { | |
3753 | ANYOF_BITMAP_SET(data->start_class, value); | |
3754 | } | |
3755 | } | |
3756 | } | |
3757 | else { | |
3758 | for (value = 0; value < 256; value++) { | |
3759 | if (!isSPACE(value)) { | |
3760 | ANYOF_BITMAP_SET(data->start_class, value); | |
3761 | } | |
3762 | } | |
3763 | } | |
653099ff | 3764 | } |
8aa23a47 YO |
3765 | break; |
3766 | case NSPACEL: | |
3767 | if (flags & SCF_DO_STCLASS_AND) { | |
3768 | if (data->start_class->flags & ANYOF_LOCALE) { | |
3769 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE); | |
3770 | for (value = 0; value < 256; value++) | |
3771 | if (!isSPACE(value)) | |
3772 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3773 | } | |
653099ff | 3774 | } |
8aa23a47 YO |
3775 | else { |
3776 | data->start_class->flags |= ANYOF_LOCALE; | |
3777 | ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE); | |
3778 | } | |
3779 | break; | |
3780 | case DIGIT: | |
3781 | if (flags & SCF_DO_STCLASS_AND) { | |
3782 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NDIGIT); | |
3783 | for (value = 0; value < 256; value++) | |
3784 | if (!isDIGIT(value)) | |
3785 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3786 | } | |
3787 | else { | |
3788 | if (data->start_class->flags & ANYOF_LOCALE) | |
3789 | ANYOF_CLASS_SET(data->start_class,ANYOF_DIGIT); | |
3790 | else { | |
3791 | for (value = 0; value < 256; value++) | |
3792 | if (isDIGIT(value)) | |
b9a59e08 | 3793 | ANYOF_BITMAP_SET(data->start_class, value); |
8aa23a47 YO |
3794 | } |
3795 | } | |
3796 | break; | |
3797 | case NDIGIT: | |
3798 | if (flags & SCF_DO_STCLASS_AND) { | |
3799 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_DIGIT); | |
3800 | for (value = 0; value < 256; value++) | |
3801 | if (isDIGIT(value)) | |
3802 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3803 | } | |
3804 | else { | |
3805 | if (data->start_class->flags & ANYOF_LOCALE) | |
3806 | ANYOF_CLASS_SET(data->start_class,ANYOF_NDIGIT); | |
3807 | else { | |
3808 | for (value = 0; value < 256; value++) | |
3809 | if (!isDIGIT(value)) | |
b9a59e08 | 3810 | ANYOF_BITMAP_SET(data->start_class, value); |
653099ff GS |
3811 | } |
3812 | } | |
8aa23a47 | 3813 | break; |
e1d1eefb YO |
3814 | CASE_SYNST_FNC(VERTWS); |
3815 | CASE_SYNST_FNC(HORIZWS); | |
3816 | ||
8aa23a47 YO |
3817 | } |
3818 | if (flags & SCF_DO_STCLASS_OR) | |
3819 | cl_and(data->start_class, and_withp); | |
3820 | flags &= ~SCF_DO_STCLASS; | |
3821 | } | |
3822 | } | |
3823 | else if (PL_regkind[OP(scan)] == EOL && flags & SCF_DO_SUBSTR) { | |
3824 | data->flags |= (OP(scan) == MEOL | |
3825 | ? SF_BEFORE_MEOL | |
3826 | : SF_BEFORE_SEOL); | |
3827 | } | |
3828 | else if ( PL_regkind[OP(scan)] == BRANCHJ | |
3829 | /* Lookbehind, or need to calculate parens/evals/stclass: */ | |
3830 | && (scan->flags || data || (flags & SCF_DO_STCLASS)) | |
3831 | && (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) { | |
3832 | if ( !PERL_ENABLE_POSITIVE_ASSERTION_STUDY | |
3833 | || OP(scan) == UNLESSM ) | |
3834 | { | |
3835 | /* Negative Lookahead/lookbehind | |
3836 | In this case we can't do fixed string optimisation. | |
3837 | */ | |
1de06328 | 3838 | |
8aa23a47 YO |
3839 | I32 deltanext, minnext, fake = 0; |
3840 | regnode *nscan; | |
3841 | struct regnode_charclass_class intrnl; | |
3842 | int f = 0; | |
1de06328 | 3843 | |
8aa23a47 YO |
3844 | data_fake.flags = 0; |
3845 | if (data) { | |
3846 | data_fake.whilem_c = data->whilem_c; | |
3847 | data_fake.last_closep = data->last_closep; | |
c277df42 | 3848 | } |
8aa23a47 YO |
3849 | else |
3850 | data_fake.last_closep = &fake; | |
58e23c8d | 3851 | data_fake.pos_delta = delta; |
8aa23a47 YO |
3852 | if ( flags & SCF_DO_STCLASS && !scan->flags |
3853 | && OP(scan) == IFMATCH ) { /* Lookahead */ | |
3854 | cl_init(pRExC_state, &intrnl); | |
3855 | data_fake.start_class = &intrnl; | |
3856 | f |= SCF_DO_STCLASS_AND; | |
3857 | } | |
3858 | if (flags & SCF_WHILEM_VISITED_POS) | |
3859 | f |= SCF_WHILEM_VISITED_POS; | |
3860 | next = regnext(scan); | |
3861 | nscan = NEXTOPER(NEXTOPER(scan)); | |
3862 | minnext = study_chunk(pRExC_state, &nscan, minlenp, &deltanext, | |
3863 | last, &data_fake, stopparen, recursed, NULL, f, depth+1); | |
3864 | if (scan->flags) { | |
3865 | if (deltanext) { | |
58e23c8d | 3866 | FAIL("Variable length lookbehind not implemented"); |
8aa23a47 YO |
3867 | } |
3868 | else if (minnext > (I32)U8_MAX) { | |
58e23c8d | 3869 | FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX); |
8aa23a47 YO |
3870 | } |
3871 | scan->flags = (U8)minnext; | |
3872 | } | |
3873 | if (data) { | |
3874 | if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) | |
3875 | pars++; | |
3876 | if (data_fake.flags & SF_HAS_EVAL) | |
3877 | data->flags |= SF_HAS_EVAL; | |
3878 | data->whilem_c = data_fake.whilem_c; | |
3879 | } | |
3880 | if (f & SCF_DO_STCLASS_AND) { | |
906cdd2b HS |
3881 | if (flags & SCF_DO_STCLASS_OR) { |
3882 | /* OR before, AND after: ideally we would recurse with | |
3883 | * data_fake to get the AND applied by study of the | |
3884 | * remainder of the pattern, and then derecurse; | |
3885 | * *** HACK *** for now just treat as "no information". | |
3886 | * See [perl #56690]. | |
3887 | */ | |
3888 | cl_init(pRExC_state, data->start_class); | |
3889 | } else { | |
3890 | /* AND before and after: combine and continue */ | |
3891 | const int was = (data->start_class->flags & ANYOF_EOS); | |
3892 | ||
3893 | cl_and(data->start_class, &intrnl); | |
3894 | if (was) | |
3895 | data->start_class->flags |= ANYOF_EOS; | |
3896 | } | |
8aa23a47 | 3897 | } |
cb434fcc | 3898 | } |
8aa23a47 YO |
3899 | #if PERL_ENABLE_POSITIVE_ASSERTION_STUDY |
3900 | else { | |
3901 | /* Positive Lookahead/lookbehind | |
3902 | In this case we can do fixed string optimisation, | |
3903 | but we must be careful about it. Note in the case of | |
3904 | lookbehind the positions will be offset by the minimum | |
3905 | length of the pattern, something we won't know about | |
3906 | until after the recurse. | |
3907 | */ | |
3908 | I32 deltanext, fake = 0; | |
3909 | regnode *nscan; | |
3910 | struct regnode_charclass_class intrnl; | |
3911 | int f = 0; | |
3912 | /* We use SAVEFREEPV so that when the full compile | |
3913 | is finished perl will clean up the allocated | |
3b753521 | 3914 | minlens when it's all done. This way we don't |
8aa23a47 YO |
3915 | have to worry about freeing them when we know |
3916 | they wont be used, which would be a pain. | |
3917 | */ | |
3918 | I32 *minnextp; | |
3919 | Newx( minnextp, 1, I32 ); | |
3920 | SAVEFREEPV(minnextp); | |
3921 | ||
3922 | if (data) { | |
3923 | StructCopy(data, &data_fake, scan_data_t); | |
3924 | if ((flags & SCF_DO_SUBSTR) && data->last_found) { | |
3925 | f |= SCF_DO_SUBSTR; | |
3926 | if (scan->flags) | |
304ee84b | 3927 | SCAN_COMMIT(pRExC_state, &data_fake,minlenp); |
8aa23a47 YO |
3928 | data_fake.last_found=newSVsv(data->last_found); |
3929 | } | |
3930 | } | |
3931 | else | |
3932 | data_fake.last_closep = &fake; | |
3933 | data_fake.flags = 0; | |
58e23c8d | 3934 | data_fake.pos_delta = delta; |
8aa23a47 YO |
3935 | if (is_inf) |
3936 | data_fake.flags |= SF_IS_INF; | |
3937 | if ( flags & SCF_DO_STCLASS && !scan->flags | |
3938 | && OP(scan) == IFMATCH ) { /* Lookahead */ | |
3939 | cl_init(pRExC_state, &intrnl); | |
3940 | data_fake.start_class = &intrnl; | |
3941 | f |= SCF_DO_STCLASS_AND; | |
3942 | } | |
3943 | if (flags & SCF_WHILEM_VISITED_POS) | |
3944 | f |= SCF_WHILEM_VISITED_POS; | |
3945 | next = regnext(scan); | |
3946 | nscan = NEXTOPER(NEXTOPER(scan)); | |
3947 | ||
3948 | *minnextp = study_chunk(pRExC_state, &nscan, minnextp, &deltanext, | |
3949 | last, &data_fake, stopparen, recursed, NULL, f,depth+1); | |
3950 | if (scan->flags) { | |
3951 | if (deltanext) { | |
58e23c8d | 3952 | FAIL("Variable length lookbehind not implemented"); |
8aa23a47 YO |
3953 | } |
3954 | else if (*minnextp > (I32)U8_MAX) { | |
58e23c8d | 3955 | FAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX); |
8aa23a47 YO |
3956 | } |
3957 | scan->flags = (U8)*minnextp; | |
3958 | } | |
3959 | ||
3960 | *minnextp += min; | |
3961 | ||
3962 | if (f & SCF_DO_STCLASS_AND) { | |
3963 | const int was = (data->start_class->flags & ANYOF_EOS); | |
3964 | ||
3965 | cl_and(data->start_class, &intrnl); | |
3966 | if (was) | |
3967 | data->start_class->flags |= ANYOF_EOS; | |
3968 | } | |
3969 | if (data) { | |
3970 | if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) | |
3971 | pars++; | |
3972 | if (data_fake.flags & SF_HAS_EVAL) | |
3973 | data->flags |= SF_HAS_EVAL; | |
3974 | data->whilem_c = data_fake.whilem_c; | |
3975 | if ((flags & SCF_DO_SUBSTR) && data_fake.last_found) { | |
3976 | if (RExC_rx->minlen<*minnextp) | |
3977 | RExC_rx->minlen=*minnextp; | |
304ee84b | 3978 | SCAN_COMMIT(pRExC_state, &data_fake, minnextp); |
8aa23a47 YO |
3979 | SvREFCNT_dec(data_fake.last_found); |
3980 | ||
3981 | if ( data_fake.minlen_fixed != minlenp ) | |
3982 | { | |
3983 | data->offset_fixed= data_fake.offset_fixed; | |
3984 | data->minlen_fixed= data_fake.minlen_fixed; | |
3985 | data->lookbehind_fixed+= scan->flags; | |
3986 | } | |
3987 | if ( data_fake.minlen_float != minlenp ) | |
3988 | { | |
3989 | data->minlen_float= data_fake.minlen_float; | |
3990 | data->offset_float_min=data_fake.offset_float_min; | |
3991 | data->offset_float_max=data_fake.offset_float_max; | |
3992 | data->lookbehind_float+= scan->flags; | |
3993 | } | |
3994 | } | |
3995 | } | |
3996 | ||
3997 | ||
40d049e4 | 3998 | } |
8aa23a47 YO |
3999 | #endif |
4000 | } | |
4001 | else if (OP(scan) == OPEN) { | |
4002 | if (stopparen != (I32)ARG(scan)) | |
4003 | pars++; | |
4004 | } | |
4005 | else if (OP(scan) == CLOSE) { | |
4006 | if (stopparen == (I32)ARG(scan)) { | |
4007 | break; | |
4008 | } | |
4009 | if ((I32)ARG(scan) == is_par) { | |
4010 | next = regnext(scan); | |
b515a41d | 4011 | |
8aa23a47 YO |
4012 | if ( next && (OP(next) != WHILEM) && next < last) |
4013 | is_par = 0; /* Disable optimization */ | |
40d049e4 | 4014 | } |
8aa23a47 YO |
4015 | if (data) |
4016 | *(data->last_closep) = ARG(scan); | |
4017 | } | |
4018 | else if (OP(scan) == EVAL) { | |
c277df42 IZ |
4019 | if (data) |
4020 | data->flags |= SF_HAS_EVAL; | |
8aa23a47 YO |
4021 | } |
4022 | else if ( PL_regkind[OP(scan)] == ENDLIKE ) { | |
4023 | if (flags & SCF_DO_SUBSTR) { | |
304ee84b | 4024 | SCAN_COMMIT(pRExC_state,data,minlenp); |
8aa23a47 | 4025 | flags &= ~SCF_DO_SUBSTR; |
40d049e4 | 4026 | } |
8aa23a47 YO |
4027 | if (data && OP(scan)==ACCEPT) { |
4028 | data->flags |= SCF_SEEN_ACCEPT; | |
4029 | if (stopmin > min) | |
4030 | stopmin = min; | |
e2e6a0f1 | 4031 | } |
8aa23a47 YO |
4032 | } |
4033 | else if (OP(scan) == LOGICAL && scan->flags == 2) /* Embedded follows */ | |
4034 | { | |
0f5d15d6 | 4035 | if (flags & SCF_DO_SUBSTR) { |
304ee84b | 4036 | SCAN_COMMIT(pRExC_state,data,minlenp); |
0f5d15d6 IZ |
4037 | data->longest = &(data->longest_float); |
4038 | } | |
4039 | is_inf = is_inf_internal = 1; | |
653099ff | 4040 | if (flags & SCF_DO_STCLASS_OR) /* Allow everything */ |
830247a4 | 4041 | cl_anything(pRExC_state, data->start_class); |
96776eda | 4042 | flags &= ~SCF_DO_STCLASS; |
8aa23a47 | 4043 | } |
58e23c8d | 4044 | else if (OP(scan) == GPOS) { |
bbe252da | 4045 | if (!(RExC_rx->extflags & RXf_GPOS_FLOAT) && |
58e23c8d YO |
4046 | !(delta || is_inf || (data && data->pos_delta))) |
4047 | { | |
bbe252da YO |
4048 | if (!(RExC_rx->extflags & RXf_ANCH) && (flags & SCF_DO_SUBSTR)) |
4049 | RExC_rx->extflags |= RXf_ANCH_GPOS; | |
58e23c8d YO |
4050 | if (RExC_rx->gofs < (U32)min) |
4051 | RExC_rx->gofs = min; | |
4052 | } else { | |
bbe252da | 4053 | RExC_rx->extflags |= RXf_GPOS_FLOAT; |
58e23c8d YO |
4054 | RExC_rx->gofs = 0; |
4055 | } | |
4056 | } | |
786e8c11 | 4057 | #ifdef TRIE_STUDY_OPT |
40d049e4 | 4058 | #ifdef FULL_TRIE_STUDY |
8aa23a47 YO |
4059 | else if (PL_regkind[OP(scan)] == TRIE) { |
4060 | /* NOTE - There is similar code to this block above for handling | |
4061 | BRANCH nodes on the initial study. If you change stuff here | |
4062 | check there too. */ | |
4063 | regnode *trie_node= scan; | |
4064 | regnode *tail= regnext(scan); | |
f8fc2ecf | 4065 | reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ]; |
8aa23a47 YO |
4066 | I32 max1 = 0, min1 = I32_MAX; |
4067 | struct regnode_charclass_class accum; | |
4068 | ||
4069 | if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */ | |
304ee84b | 4070 | SCAN_COMMIT(pRExC_state, data,minlenp); /* Cannot merge strings after this. */ |
8aa23a47 YO |
4071 | if (flags & SCF_DO_STCLASS) |
4072 | cl_init_zero(pRExC_state, &accum); | |
4073 | ||
4074 | if (!trie->jump) { | |
4075 | min1= trie->minlen; | |
4076 | max1= trie->maxlen; | |
4077 | } else { | |
4078 | const regnode *nextbranch= NULL; | |
4079 | U32 word; | |
4080 | ||
4081 | for ( word=1 ; word <= trie->wordcount ; word++) | |
4082 | { | |
4083 | I32 deltanext=0, minnext=0, f = 0, fake; | |
4084 | struct regnode_charclass_class this_class; | |
4085 | ||
4086 | data_fake.flags = 0; | |
4087 | if (data) { | |
4088 | data_fake.whilem_c = data->whilem_c; | |
4089 | data_fake.last_closep = data->last_closep; | |
4090 | } | |
4091 | else | |
4092 | data_fake.last_closep = &fake; | |
58e23c8d | 4093 | data_fake.pos_delta = delta; |
8aa23a47 YO |
4094 | if (flags & SCF_DO_STCLASS) { |
4095 | cl_init(pRExC_state, &this_class); | |
4096 | data_fake.start_class = &this_class; | |
4097 | f = SCF_DO_STCLASS_AND; | |
4098 | } | |
4099 | if (flags & SCF_WHILEM_VISITED_POS) | |
4100 | f |= SCF_WHILEM_VISITED_POS; | |
4101 | ||
4102 | if (trie->jump[word]) { | |
4103 | if (!nextbranch) | |
4104 | nextbranch = trie_node + trie->jump[0]; | |
4105 | scan= trie_node + trie->jump[word]; | |
4106 | /* We go from the jump point to the branch that follows | |
4107 | it. Note this means we need the vestigal unused branches | |
4108 | even though they arent otherwise used. | |
4109 | */ | |
4110 | minnext = study_chunk(pRExC_state, &scan, minlenp, | |
4111 | &deltanext, (regnode *)nextbranch, &data_fake, | |
4112 | stopparen, recursed, NULL, f,depth+1); | |
4113 | } | |
4114 | if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH) | |
4115 | nextbranch= regnext((regnode*)nextbranch); | |
4116 | ||
4117 | if (min1 > (I32)(minnext + trie->minlen)) | |
4118 | min1 = minnext + trie->minlen; | |
4119 | if (max1 < (I32)(minnext + deltanext + trie->maxlen)) | |
4120 | max1 = minnext + deltanext + trie->maxlen; | |
4121 | if (deltanext == I32_MAX) | |
4122 | is_inf = is_inf_internal = 1; | |
4123 | ||
4124 | if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) | |
4125 | pars++; | |
4126 | if (data_fake.flags & SCF_SEEN_ACCEPT) { | |
4127 | if ( stopmin > min + min1) | |
4128 | stopmin = min + min1; | |
4129 | flags &= ~SCF_DO_SUBSTR; | |
4130 | if (data) | |
4131 | data->flags |= SCF_SEEN_ACCEPT; | |
4132 | } | |
4133 | if (data) { | |
4134 | if (data_fake.flags & SF_HAS_EVAL) | |
4135 | data->flags |= SF_HAS_EVAL; | |
4136 | data->whilem_c = data_fake.whilem_c; | |
4137 | } | |
4138 | if (flags & SCF_DO_STCLASS) | |
4139 | cl_or(pRExC_state, &accum, &this_class); | |
4140 | } | |
4141 | } | |
4142 | if (flags & SCF_DO_SUBSTR) { | |
4143 | data->pos_min += min1; | |
4144 | data->pos_delta += max1 - min1; | |
4145 | if (max1 != min1 || is_inf) | |
4146 | data->longest = &(data->longest_float); | |
4147 | } | |
4148 | min += min1; | |
4149 | delta += max1 - min1; | |
4150 | if (flags & SCF_DO_STCLASS_OR) { | |
4151 | cl_or(pRExC_state, data->start_class, &accum); | |
4152 | if (min1) { | |
4153 | cl_and(data->start_class, and_withp); | |
4154 | flags &= ~SCF_DO_STCLASS; | |
4155 | } | |
4156 | } | |
4157 | else if (flags & SCF_DO_STCLASS_AND) { | |
4158 | if (min1) { | |
4159 | cl_and(data->start_class, &accum); | |
4160 | flags &= ~SCF_DO_STCLASS; | |
4161 | } | |
4162 | else { | |
4163 | /* Switch to OR mode: cache the old value of | |
4164 | * data->start_class */ | |
4165 | INIT_AND_WITHP; | |
4166 | StructCopy(data->start_class, and_withp, | |
4167 | struct regnode_charclass_class); | |
4168 | flags &= ~SCF_DO_STCLASS_AND; | |
4169 | StructCopy(&accum, data->start_class, | |
4170 | struct regnode_charclass_class); | |
4171 | flags |= SCF_DO_STCLASS_OR; | |
4172 | data->start_class->flags |= ANYOF_EOS; | |
4173 | } | |
4174 | } | |
4175 | scan= tail; | |
4176 | continue; | |
4177 | } | |
786e8c11 | 4178 | #else |
8aa23a47 | 4179 | else if (PL_regkind[OP(scan)] == TRIE) { |
f8fc2ecf | 4180 | reg_trie_data *trie = (reg_trie_data*)RExC_rxi->data->data[ ARG(scan) ]; |
8aa23a47 YO |
4181 | U8*bang=NULL; |
4182 | ||
4183 | min += trie->minlen; | |
4184 | delta += (trie->maxlen - trie->minlen); | |
4185 | flags &= ~SCF_DO_STCLASS; /* xxx */ | |
4186 | if (flags & SCF_DO_SUBSTR) { | |
304ee84b | 4187 | SCAN_COMMIT(pRExC_state,data,minlenp); /* Cannot expect anything... */ |
8aa23a47 YO |
4188 | data->pos_min += trie->minlen; |
4189 | data->pos_delta += (trie->maxlen - trie->minlen); | |
4190 | if (trie->maxlen != trie->minlen) | |
4191 | data->longest = &(data->longest_float); | |
4192 | } | |
4193 | if (trie->jump) /* no more substrings -- for now /grr*/ | |
4194 | flags &= ~SCF_DO_SUBSTR; | |
b515a41d | 4195 | } |
8aa23a47 YO |
4196 | #endif /* old or new */ |
4197 | #endif /* TRIE_STUDY_OPT */ | |
e1d1eefb | 4198 | |
8aa23a47 YO |
4199 | /* Else: zero-length, ignore. */ |
4200 | scan = regnext(scan); | |
4201 | } | |
4202 | if (frame) { | |
4203 | last = frame->last; | |
4204 | scan = frame->next; | |
4205 | stopparen = frame->stop; | |
4206 | frame = frame->prev; | |
4207 | goto fake_study_recurse; | |
c277df42 IZ |
4208 | } |
4209 | ||
4210 | finish: | |
8aa23a47 | 4211 | assert(!frame); |
304ee84b | 4212 | DEBUG_STUDYDATA("pre-fin:",data,depth); |
8aa23a47 | 4213 | |
c277df42 | 4214 | *scanp = scan; |
aca2d497 | 4215 | *deltap = is_inf_internal ? I32_MAX : delta; |
b81d288d | 4216 | if (flags & SCF_DO_SUBSTR && is_inf) |
c277df42 | 4217 | data->pos_delta = I32_MAX - data->pos_min; |
786e8c11 | 4218 | if (is_par > (I32)U8_MAX) |
c277df42 IZ |
4219 | is_par = 0; |
4220 | if (is_par && pars==1 && data) { | |
4221 | data->flags |= SF_IN_PAR; | |
4222 | data->flags &= ~SF_HAS_PAR; | |
a0ed51b3 LW |
4223 | } |
4224 | else if (pars && data) { | |
c277df42 IZ |
4225 | data->flags |= SF_HAS_PAR; |
4226 | data->flags &= ~SF_IN_PAR; | |
4227 | } | |
653099ff | 4228 | if (flags & SCF_DO_STCLASS_OR) |
40d049e4 | 4229 | cl_and(data->start_class, and_withp); |
786e8c11 YO |
4230 | if (flags & SCF_TRIE_RESTUDY) |
4231 | data->flags |= SCF_TRIE_RESTUDY; | |
1de06328 | 4232 | |
304ee84b | 4233 | DEBUG_STUDYDATA("post-fin:",data,depth); |
1de06328 | 4234 | |
e2e6a0f1 | 4235 | return min < stopmin ? min : stopmin; |
c277df42 IZ |
4236 | } |
4237 | ||
2eccd3b2 NC |
4238 | STATIC U32 |
4239 | S_add_data(RExC_state_t *pRExC_state, U32 n, const char *s) | |
c277df42 | 4240 | { |
4a4e7719 NC |
4241 | U32 count = RExC_rxi->data ? RExC_rxi->data->count : 0; |
4242 | ||
7918f24d NC |
4243 | PERL_ARGS_ASSERT_ADD_DATA; |
4244 | ||
4a4e7719 NC |
4245 | Renewc(RExC_rxi->data, |
4246 | sizeof(*RExC_rxi->data) + sizeof(void*) * (count + n - 1), | |
4247 | char, struct reg_data); | |
4248 | if(count) | |
f8fc2ecf | 4249 | Renew(RExC_rxi->data->what, count + n, U8); |
4a4e7719 | 4250 | else |
f8fc2ecf | 4251 | Newx(RExC_rxi->data->what, n, U8); |
4a4e7719 NC |
4252 | RExC_rxi->data->count = count + n; |
4253 | Copy(s, RExC_rxi->data->what + count, n, U8); | |
4254 | return count; | |
c277df42 IZ |
4255 | } |
4256 | ||
f8149455 | 4257 | /*XXX: todo make this not included in a non debugging perl */ |
76234dfb | 4258 | #ifndef PERL_IN_XSUB_RE |
d88dccdf | 4259 | void |
864dbfa3 | 4260 | Perl_reginitcolors(pTHX) |
d88dccdf | 4261 | { |
97aff369 | 4262 | dVAR; |
1df70142 | 4263 | const char * const s = PerlEnv_getenv("PERL_RE_COLORS"); |
d88dccdf | 4264 | if (s) { |
1df70142 AL |
4265 | char *t = savepv(s); |
4266 | int i = 0; | |
4267 | PL_colors[0] = t; | |
d88dccdf | 4268 | while (++i < 6) { |
1df70142 AL |
4269 | t = strchr(t, '\t'); |
4270 | if (t) { | |
4271 | *t = '\0'; | |
4272 | PL_colors[i] = ++t; | |
d88dccdf IZ |
4273 | } |
4274 | else | |
1df70142 | 4275 | PL_colors[i] = t = (char *)""; |
d88dccdf IZ |
4276 | } |
4277 | } else { | |
1df70142 | 4278 | int i = 0; |
b81d288d | 4279 | while (i < 6) |
06b5626a | 4280 | PL_colors[i++] = (char *)""; |
d88dccdf IZ |
4281 | } |
4282 | PL_colorset = 1; | |
4283 | } | |
76234dfb | 4284 | #endif |
8615cb43 | 4285 | |
07be1b83 | 4286 | |
786e8c11 YO |
4287 | #ifdef TRIE_STUDY_OPT |
4288 | #define CHECK_RESTUDY_GOTO \ | |
4289 | if ( \ | |
4290 | (data.flags & SCF_TRIE_RESTUDY) \ | |
4291 | && ! restudied++ \ | |
4292 | ) goto reStudy | |
4293 | #else | |
4294 | #define CHECK_RESTUDY_GOTO | |
4295 | #endif | |
f9f4320a | 4296 | |
a687059c | 4297 | /* |
e50aee73 | 4298 | - pregcomp - compile a regular expression into internal code |
a687059c LW |
4299 | * |
4300 | * We can't allocate space until we know how big the compiled form will be, | |
4301 | * but we can't compile it (and thus know how big it is) until we've got a | |
4302 | * place to put the code. So we cheat: we compile it twice, once with code | |
4303 | * generation turned off and size counting turned on, and once "for real". | |
4304 | * This also means that we don't allocate space until we are sure that the | |
4305 | * thing really will compile successfully, and we never have to move the | |
4306 | * code and thus invalidate pointers into it. (Note that it has to be in | |
4307 | * one piece because free() must be able to free it all.) [NB: not true in perl] | |
4308 | * | |
4309 | * Beware that the optimization-preparation code in here knows about some | |
4310 | * of the structure of the compiled regexp. [I'll say.] | |
4311 | */ | |
b9b4dddf YO |
4312 | |
4313 | ||
4314 | ||
f9f4320a | 4315 | #ifndef PERL_IN_XSUB_RE |
f9f4320a YO |
4316 | #define RE_ENGINE_PTR &PL_core_reg_engine |
4317 | #else | |
f9f4320a YO |
4318 | extern const struct regexp_engine my_reg_engine; |
4319 | #define RE_ENGINE_PTR &my_reg_engine | |
4320 | #endif | |
6d5c990f RGS |
4321 | |
4322 | #ifndef PERL_IN_XSUB_RE | |
3ab4a224 | 4323 | REGEXP * |
1593ad57 | 4324 | Perl_pregcomp(pTHX_ SV * const pattern, const U32 flags) |
a687059c | 4325 | { |
97aff369 | 4326 | dVAR; |
6d5c990f | 4327 | HV * const table = GvHV(PL_hintgv); |
7918f24d NC |
4328 | |
4329 | PERL_ARGS_ASSERT_PREGCOMP; | |
4330 | ||
f9f4320a YO |
4331 | /* Dispatch a request to compile a regexp to correct |
4332 | regexp engine. */ | |
f9f4320a YO |
4333 | if (table) { |
4334 | SV **ptr= hv_fetchs(table, "regcomp", FALSE); | |
6d5c990f | 4335 | GET_RE_DEBUG_FLAGS_DECL; |
1e2e3d02 | 4336 | if (ptr && SvIOK(*ptr) && SvIV(*ptr)) { |
f9f4320a YO |
4337 | const regexp_engine *eng=INT2PTR(regexp_engine*,SvIV(*ptr)); |
4338 | DEBUG_COMPILE_r({ | |
8d8756e7 | 4339 | PerlIO_printf(Perl_debug_log, "Using engine %"UVxf"\n", |
f9f4320a YO |
4340 | SvIV(*ptr)); |
4341 | }); | |
3ab4a224 | 4342 | return CALLREGCOMP_ENG(eng, pattern, flags); |
f9f4320a | 4343 | } |
b9b4dddf | 4344 | } |
3ab4a224 | 4345 | return Perl_re_compile(aTHX_ pattern, flags); |
2a5d9b1d | 4346 | } |
6d5c990f | 4347 | #endif |
2a5d9b1d | 4348 | |
3ab4a224 | 4349 | REGEXP * |
1593ad57 | 4350 | Perl_re_compile(pTHX_ SV * const pattern, U32 pm_flags) |
2a5d9b1d RGS |
4351 | { |
4352 | dVAR; | |
288b8c02 NC |
4353 | REGEXP *rx; |
4354 | struct regexp *r; | |
f8fc2ecf | 4355 | register regexp_internal *ri; |
3ab4a224 | 4356 | STRLEN plen; |
5d51ce98 KW |
4357 | char *exp; |
4358 | char* xend; | |
c277df42 | 4359 | regnode *scan; |
a0d0e21e | 4360 | I32 flags; |
a0d0e21e | 4361 | I32 minlen = 0; |
e7f38d0f YO |
4362 | |
4363 | /* these are all flags - maybe they should be turned | |
4364 | * into a single int with different bit masks */ | |
4365 | I32 sawlookahead = 0; | |
a0d0e21e LW |
4366 | I32 sawplus = 0; |
4367 | I32 sawopen = 0; | |
e7f38d0f | 4368 | |
bbd61b5f KW |
4369 | U8 jump_ret = 0; |
4370 | dJMPENV; | |
2c2d71f5 | 4371 | scan_data_t data; |
830247a4 | 4372 | RExC_state_t RExC_state; |
be8e71aa | 4373 | RExC_state_t * const pRExC_state = &RExC_state; |
07be1b83 | 4374 | #ifdef TRIE_STUDY_OPT |
5d51ce98 | 4375 | int restudied; |
07be1b83 YO |
4376 | RExC_state_t copyRExC_state; |
4377 | #endif | |
2a5d9b1d | 4378 | GET_RE_DEBUG_FLAGS_DECL; |
7918f24d NC |
4379 | |
4380 | PERL_ARGS_ASSERT_RE_COMPILE; | |
4381 | ||
6d5c990f | 4382 | DEBUG_r(if (!PL_colorset) reginitcolors()); |
a0d0e21e | 4383 | |
b9ad30b4 | 4384 | RExC_utf8 = RExC_orig_utf8 = SvUTF8(pattern); |
a0ed51b3 | 4385 | |
02daf0ab | 4386 | |
bbd61b5f KW |
4387 | /* Longjmp back to here if have to switch in midstream to utf8 */ |
4388 | if (! RExC_orig_utf8) { | |
4389 | JMPENV_PUSH(jump_ret); | |
4390 | } | |
4391 | ||
5d51ce98 KW |
4392 | if (jump_ret == 0) { /* First time through */ |
4393 | exp = SvPV(pattern, plen); | |
4394 | xend = exp + plen; | |
4395 | ||
4396 | DEBUG_COMPILE_r({ | |
4397 | SV *dsv= sv_newmortal(); | |
4398 | RE_PV_QUOTED_DECL(s, RExC_utf8, | |
4399 | dsv, exp, plen, 60); | |
4400 | PerlIO_printf(Perl_debug_log, "%sCompiling REx%s %s\n", | |
4401 | PL_colors[4],PL_colors[5],s); | |
4402 | }); | |
4403 | } | |
4404 | else { /* longjumped back */ | |
bbd61b5f KW |
4405 | STRLEN len = plen; |
4406 | ||
5d51ce98 KW |
4407 | /* If the cause for the longjmp was other than changing to utf8, pop |
4408 | * our own setjmp, and longjmp to the correct handler */ | |
bbd61b5f KW |
4409 | if (jump_ret != UTF8_LONGJMP) { |
4410 | JMPENV_POP; | |
4411 | JMPENV_JUMP(jump_ret); | |
4412 | } | |
4413 | ||
595598ee KW |
4414 | GET_RE_DEBUG_FLAGS; |
4415 | ||
bbd61b5f KW |
4416 | /* It's possible to write a regexp in ascii that represents Unicode |
4417 | codepoints outside of the byte range, such as via \x{100}. If we | |
4418 | detect such a sequence we have to convert the entire pattern to utf8 | |
4419 | and then recompile, as our sizing calculation will have been based | |
4420 | on 1 byte == 1 character, but we will need to use utf8 to encode | |
4421 | at least some part of the pattern, and therefore must convert the whole | |
4422 | thing. | |
4423 | -- dmq */ | |
4424 | DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, | |
4425 | "UTF8 mismatch! Converting to utf8 for resizing and compile\n")); | |
595598ee | 4426 | exp = (char*)Perl_bytes_to_utf8(aTHX_ (U8*)SvPV(pattern, plen), &len); |
bbd61b5f KW |
4427 | xend = exp + len; |
4428 | RExC_orig_utf8 = RExC_utf8 = 1; | |
4429 | SAVEFREEPV(exp); | |
4430 | } | |
4431 | ||
5d51ce98 KW |
4432 | #ifdef TRIE_STUDY_OPT |
4433 | restudied = 0; | |
4434 | #endif | |
4435 | ||
02daf0ab | 4436 | RExC_precomp = exp; |
c737faaf | 4437 | RExC_flags = pm_flags; |
830247a4 | 4438 | RExC_sawback = 0; |
bbce6d69 | 4439 | |
830247a4 IZ |
4440 | RExC_seen = 0; |
4441 | RExC_seen_zerolen = *exp == '^' ? -1 : 0; | |
4442 | RExC_seen_evals = 0; | |
4443 | RExC_extralen = 0; | |
c277df42 | 4444 | |
bbce6d69 | 4445 | /* First pass: determine size, legality. */ |
830247a4 | 4446 | RExC_parse = exp; |
fac92740 | 4447 | RExC_start = exp; |
830247a4 IZ |
4448 | RExC_end = xend; |
4449 | RExC_naughty = 0; | |
4450 | RExC_npar = 1; | |
e2e6a0f1 | 4451 | RExC_nestroot = 0; |
830247a4 IZ |
4452 | RExC_size = 0L; |
4453 | RExC_emit = &PL_regdummy; | |
4454 | RExC_whilem_seen = 0; | |
40d049e4 YO |
4455 | RExC_open_parens = NULL; |
4456 | RExC_close_parens = NULL; | |
4457 | RExC_opend = NULL; | |
81714fb9 | 4458 | RExC_paren_names = NULL; |
1f1031fe YO |
4459 | #ifdef DEBUGGING |
4460 | RExC_paren_name_list = NULL; | |
4461 | #endif | |
40d049e4 YO |
4462 | RExC_recurse = NULL; |
4463 | RExC_recurse_count = 0; | |
81714fb9 | 4464 | |
85ddcde9 JH |
4465 | #if 0 /* REGC() is (currently) a NOP at the first pass. |
4466 | * Clever compilers notice this and complain. --jhi */ | |
830247a4 | 4467 | REGC((U8)REG_MAGIC, (char*)RExC_emit); |
85ddcde9 | 4468 | #endif |
3dab1dad YO |
4469 | DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "Starting first pass (sizing)\n")); |
4470 | if (reg(pRExC_state, 0, &flags,1) == NULL) { | |
c445ea15 | 4471 | RExC_precomp = NULL; |
a0d0e21e LW |
4472 | return(NULL); |
4473 | } | |
bbd61b5f KW |
4474 | |
4475 | /* Here, finished first pass. Get rid of our setjmp, which we added for | |
4476 | * efficiency only if the passed-in string wasn't in utf8, as shown by | |
4477 | * RExC_orig_utf8. But if the first pass was redone, that variable will be | |
4478 | * 1 here even though the original string wasn't utf8, but in this case | |
4479 | * there will have been a long jump */ | |
4480 | if (jump_ret == UTF8_LONGJMP || ! RExC_orig_utf8) { | |
4481 | JMPENV_POP; | |
02daf0ab | 4482 | } |
07be1b83 | 4483 | DEBUG_PARSE_r({ |
81714fb9 YO |
4484 | PerlIO_printf(Perl_debug_log, |
4485 | "Required size %"IVdf" nodes\n" | |
4486 | "Starting second pass (creation)\n", | |
4487 | (IV)RExC_size); | |
07be1b83 YO |
4488 | RExC_lastnum=0; |
4489 | RExC_lastparse=NULL; | |
4490 | }); | |
c277df42 IZ |
4491 | /* Small enough for pointer-storage convention? |
4492 | If extralen==0, this means that we will not need long jumps. */ | |
830247a4 IZ |
4493 | if (RExC_size >= 0x10000L && RExC_extralen) |
4494 | RExC_size += RExC_extralen; | |
c277df42 | 4495 | else |
830247a4 IZ |
4496 | RExC_extralen = 0; |
4497 | if (RExC_whilem_seen > 15) | |
4498 | RExC_whilem_seen = 15; | |
a0d0e21e | 4499 | |
f9f4320a YO |
4500 | /* Allocate space and zero-initialize. Note, the two step process |
4501 | of zeroing when in debug mode, thus anything assigned has to | |
4502 | happen after that */ | |
d2f13c59 | 4503 | rx = (REGEXP*) newSV_type(SVt_REGEXP); |
288b8c02 | 4504 | r = (struct regexp*)SvANY(rx); |
f8fc2ecf YO |
4505 | Newxc(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode), |
4506 | char, regexp_internal); | |
4507 | if ( r == NULL || ri == NULL ) | |
b45f050a | 4508 | FAIL("Regexp out of space"); |
0f79a09d GS |
4509 | #ifdef DEBUGGING |
4510 | /* avoid reading uninitialized memory in DEBUGGING code in study_chunk() */ | |
f8fc2ecf | 4511 | Zero(ri, sizeof(regexp_internal) + (unsigned)RExC_size * sizeof(regnode), char); |
58e23c8d | 4512 | #else |
f8fc2ecf YO |
4513 | /* bulk initialize base fields with 0. */ |
4514 | Zero(ri, sizeof(regexp_internal), char); | |
0f79a09d | 4515 | #endif |
58e23c8d YO |
4516 | |
4517 | /* non-zero initialization begins here */ | |
f8fc2ecf | 4518 | RXi_SET( r, ri ); |
f9f4320a | 4519 | r->engine= RE_ENGINE_PTR; |
c737faaf | 4520 | r->extflags = pm_flags; |
bcdf7404 | 4521 | { |
f7819f85 | 4522 | bool has_p = ((r->extflags & RXf_PMf_KEEPCOPY) == RXf_PMf_KEEPCOPY); |
77ba44fb | 4523 | bool has_charset = cBOOL(r->extflags & (RXf_PMf_LOCALE|RXf_PMf_UNICODE)); |
c5ea2ffa KW |
4524 | |
4525 | /* The caret is output if there are any defaults: if not all the STD | |
4526 | * flags are set, or if no character set specifier is needed */ | |
4527 | bool has_default = | |
4528 | (((r->extflags & RXf_PMf_STD_PMMOD) != RXf_PMf_STD_PMMOD) | |
4529 | || ! has_charset); | |
bcdf7404 | 4530 | bool has_runon = ((RExC_seen & REG_SEEN_RUN_ON_COMMENT)==REG_SEEN_RUN_ON_COMMENT); |
14f3b9f2 NC |
4531 | U16 reganch = (U16)((r->extflags & RXf_PMf_STD_PMMOD) |
4532 | >> RXf_PMf_STD_PMMOD_SHIFT); | |
bcdf7404 YO |
4533 | const char *fptr = STD_PAT_MODS; /*"msix"*/ |
4534 | char *p; | |
fb85c044 | 4535 | /* Allocate for the worst case, which is all the std flags are turned |
c5ea2ffa KW |
4536 | * on. If more precision is desired, we could do a population count of |
4537 | * the flags set. This could be done with a small lookup table, or by | |
4538 | * shifting, masking and adding, or even, when available, assembly | |
4539 | * language for a machine-language population count. | |
4540 | * We never output a minus, as all those are defaults, so are | |
4541 | * covered by the caret */ | |
fb85c044 | 4542 | const STRLEN wraplen = plen + has_p + has_runon |
c5ea2ffa KW |
4543 | + has_default /* If needs a caret */ |
4544 | + has_charset /* If needs a character set specifier */ | |
bcdf7404 YO |
4545 | + (sizeof(STD_PAT_MODS) - 1) |
4546 | + (sizeof("(?:)") - 1); | |
4547 | ||
c5ea2ffa | 4548 | p = sv_grow(MUTABLE_SV(rx), wraplen + 1); /* +1 for the ending NUL */ |
f7c278bf | 4549 | SvPOK_on(rx); |
8f6ae13c | 4550 | SvFLAGS(rx) |= SvUTF8(pattern); |
bcdf7404 | 4551 | *p++='('; *p++='?'; |
9de15fec KW |
4552 | |
4553 | /* If a default, cover it using the caret */ | |
c5ea2ffa | 4554 | if (has_default) { |
85508812 | 4555 | *p++= DEFAULT_PAT_MOD; |
fb85c044 | 4556 | } |
c5ea2ffa KW |
4557 | if (has_charset) { |
4558 | if (r->extflags & RXf_PMf_LOCALE) { | |
4559 | *p++ = LOCALE_PAT_MOD; | |
4560 | } else { | |
4561 | *p++ = UNICODE_PAT_MOD; | |
4562 | } | |
9de15fec | 4563 | } |
f7819f85 A |
4564 | if (has_p) |
4565 | *p++ = KEEPCOPY_PAT_MOD; /*'p'*/ | |
bcdf7404 | 4566 | { |
bcdf7404 | 4567 | char ch; |
bcdf7404 YO |
4568 | while((ch = *fptr++)) { |
4569 | if(reganch & 1) | |
4570 | *p++ = ch; | |
bcdf7404 YO |
4571 | reganch >>= 1; |
4572 | } | |
bcdf7404 YO |
4573 | } |
4574 | ||
28d8d7f4 | 4575 | *p++ = ':'; |
bb661a58 | 4576 | Copy(RExC_precomp, p, plen, char); |
efd26800 NC |
4577 | assert ((RX_WRAPPED(rx) - p) < 16); |
4578 | r->pre_prefix = p - RX_WRAPPED(rx); | |
bb661a58 | 4579 | p += plen; |
bcdf7404 | 4580 | if (has_runon) |
28d8d7f4 YO |
4581 | *p++ = '\n'; |
4582 | *p++ = ')'; | |
4583 | *p = 0; | |
fb85c044 | 4584 | SvCUR_set(rx, p - SvPVX_const(rx)); |
bcdf7404 YO |
4585 | } |
4586 | ||
bbe252da | 4587 | r->intflags = 0; |
830247a4 | 4588 | r->nparens = RExC_npar - 1; /* set early to validate backrefs */ |
81714fb9 | 4589 | |
6bda09f9 | 4590 | if (RExC_seen & REG_SEEN_RECURSE) { |
40d049e4 YO |
4591 | Newxz(RExC_open_parens, RExC_npar,regnode *); |
4592 | SAVEFREEPV(RExC_open_parens); | |
4593 | Newxz(RExC_close_parens,RExC_npar,regnode *); | |
4594 | SAVEFREEPV(RExC_close_parens); | |
6bda09f9 YO |
4595 | } |
4596 | ||
4597 | /* Useful during FAIL. */ | |
7122b237 YO |
4598 | #ifdef RE_TRACK_PATTERN_OFFSETS |
4599 | Newxz(ri->u.offsets, 2*RExC_size+1, U32); /* MJD 20001228 */ | |
a3621e74 | 4600 | DEBUG_OFFSETS_r(PerlIO_printf(Perl_debug_log, |
2af232bd | 4601 | "%s %"UVuf" bytes for offset annotations.\n", |
7122b237 | 4602 | ri->u.offsets ? "Got" : "Couldn't get", |
392fbf5d | 4603 | (UV)((2*RExC_size+1) * sizeof(U32)))); |
7122b237 YO |
4604 | #endif |
4605 | SetProgLen(ri,RExC_size); | |
288b8c02 | 4606 | RExC_rx_sv = rx; |
830247a4 | 4607 | RExC_rx = r; |
f8fc2ecf | 4608 | RExC_rxi = ri; |
bbce6d69 | 4609 | |
4610 | /* Second pass: emit code. */ | |
c737faaf | 4611 | RExC_flags = pm_flags; /* don't let top level (?i) bleed */ |
830247a4 IZ |
4612 | RExC_parse = exp; |
4613 | RExC_end = xend; | |
4614 | RExC_naughty = 0; | |
4615 | RExC_npar = 1; | |
f8fc2ecf YO |
4616 | RExC_emit_start = ri->program; |
4617 | RExC_emit = ri->program; | |
3b57cd43 YO |
4618 | RExC_emit_bound = ri->program + RExC_size + 1; |
4619 | ||
2cd61cdb | 4620 | /* Store the count of eval-groups for security checks: */ |
f8149455 | 4621 | RExC_rx->seen_evals = RExC_seen_evals; |
830247a4 | 4622 | REGC((U8)REG_MAGIC, (char*) RExC_emit++); |
80757612 | 4623 | if (reg(pRExC_state, 0, &flags,1) == NULL) { |
288b8c02 | 4624 | ReREFCNT_dec(rx); |
a0d0e21e | 4625 | return(NULL); |
80757612 | 4626 | } |
07be1b83 YO |
4627 | /* XXXX To minimize changes to RE engine we always allocate |
4628 | 3-units-long substrs field. */ | |
4629 | Newx(r->substrs, 1, struct reg_substr_data); | |
40d049e4 YO |
4630 | if (RExC_recurse_count) { |
4631 | Newxz(RExC_recurse,RExC_recurse_count,regnode *); | |
4632 | SAVEFREEPV(RExC_recurse); | |
4633 | } | |
a0d0e21e | 4634 | |
07be1b83 | 4635 | reStudy: |
e7f38d0f | 4636 | r->minlen = minlen = sawlookahead = sawplus = sawopen = 0; |
07be1b83 | 4637 | Zero(r->substrs, 1, struct reg_substr_data); |
a3621e74 | 4638 | |
07be1b83 | 4639 | #ifdef TRIE_STUDY_OPT |
0934c9d9 SH |
4640 | if (!restudied) { |
4641 | StructCopy(&zero_scan_data, &data, scan_data_t); | |
4642 | copyRExC_state = RExC_state; | |
4643 | } else { | |
5d458dd8 | 4644 | U32 seen=RExC_seen; |
07be1b83 | 4645 | DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log,"Restudying\n")); |
5d458dd8 YO |
4646 | |
4647 | RExC_state = copyRExC_state; | |
4648 | if (seen & REG_TOP_LEVEL_BRANCHES) | |
4649 | RExC_seen |= REG_TOP_LEVEL_BRANCHES; | |
4650 | else | |
4651 | RExC_seen &= ~REG_TOP_LEVEL_BRANCHES; | |
1de06328 | 4652 | if (data.last_found) { |
07be1b83 | 4653 | SvREFCNT_dec(data.longest_fixed); |
07be1b83 | 4654 | SvREFCNT_dec(data.longest_float); |
07be1b83 | 4655 | SvREFCNT_dec(data.last_found); |
1de06328 | 4656 | } |
40d049e4 | 4657 | StructCopy(&zero_scan_data, &data, scan_data_t); |
07be1b83 | 4658 | } |
40d049e4 YO |
4659 | #else |
4660 | StructCopy(&zero_scan_data, &data, scan_data_t); | |
07be1b83 | 4661 | #endif |
fc8cd66c | 4662 | |
a0d0e21e | 4663 | /* Dig out information for optimizations. */ |
f7819f85 | 4664 | r->extflags = RExC_flags; /* was pm_op */ |
c737faaf YO |
4665 | /*dmq: removed as part of de-PMOP: pm->op_pmflags = RExC_flags; */ |
4666 | ||
a0ed51b3 | 4667 | if (UTF) |
8f6ae13c | 4668 | SvUTF8_on(rx); /* Unicode in it? */ |
f8fc2ecf | 4669 | ri->regstclass = NULL; |
830247a4 | 4670 | if (RExC_naughty >= 10) /* Probably an expensive pattern. */ |
bbe252da | 4671 | r->intflags |= PREGf_NAUGHTY; |
f8fc2ecf | 4672 | scan = ri->program + 1; /* First BRANCH. */ |
2779dcf1 | 4673 | |
1de06328 YO |
4674 | /* testing for BRANCH here tells us whether there is "must appear" |
4675 | data in the pattern. If there is then we can use it for optimisations */ | |
eaf3ca90 | 4676 | if (!(RExC_seen & REG_TOP_LEVEL_BRANCHES)) { /* Only one top-level choice. */ |
c277df42 | 4677 | I32 fake; |
c5254dd6 | 4678 | STRLEN longest_float_length, longest_fixed_length; |
07be1b83 | 4679 | struct regnode_charclass_class ch_class; /* pointed to by data */ |
653099ff | 4680 | int stclass_flag; |
07be1b83 | 4681 | I32 last_close = 0; /* pointed to by data */ |
5339e136 YO |
4682 | regnode *first= scan; |
4683 | regnode *first_next= regnext(first); | |
639081d6 YO |
4684 | /* |
4685 | * Skip introductions and multiplicators >= 1 | |
4686 | * so that we can extract the 'meat' of the pattern that must | |
4687 | * match in the large if() sequence following. | |
4688 | * NOTE that EXACT is NOT covered here, as it is normally | |
4689 | * picked up by the optimiser separately. | |
4690 | * | |
4691 | * This is unfortunate as the optimiser isnt handling lookahead | |
4692 | * properly currently. | |
4693 | * | |
4694 | */ | |
a0d0e21e | 4695 | while ((OP(first) == OPEN && (sawopen = 1)) || |
653099ff | 4696 | /* An OR of *one* alternative - should not happen now. */ |
5339e136 | 4697 | (OP(first) == BRANCH && OP(first_next) != BRANCH) || |
07be1b83 | 4698 | /* for now we can't handle lookbehind IFMATCH*/ |
e7f38d0f | 4699 | (OP(first) == IFMATCH && !first->flags && (sawlookahead = 1)) || |
a0d0e21e LW |
4700 | (OP(first) == PLUS) || |
4701 | (OP(first) == MINMOD) || | |
653099ff | 4702 | /* An {n,m} with n>0 */ |
5339e136 YO |
4703 | (PL_regkind[OP(first)] == CURLY && ARG1(first) > 0) || |
4704 | (OP(first) == NOTHING && PL_regkind[OP(first_next)] != END )) | |
07be1b83 | 4705 | { |
639081d6 YO |
4706 | /* |
4707 | * the only op that could be a regnode is PLUS, all the rest | |
4708 | * will be regnode_1 or regnode_2. | |
4709 | * | |
4710 | */ | |
a0d0e21e LW |
4711 | if (OP(first) == PLUS) |
4712 | sawplus = 1; | |
4713 | else | |
3dab1dad | 4714 | first += regarglen[OP(first)]; |
639081d6 YO |
4715 | |
4716 | first = NEXTOPER(first); | |
5339e136 | 4717 | first_next= regnext(first); |
a687059c LW |
4718 | } |
4719 | ||
a0d0e21e LW |
4720 | /* Starting-point info. */ |
4721 | again: | |
786e8c11 | 4722 | DEBUG_PEEP("first:",first,0); |
07be1b83 | 4723 | /* Ignore EXACT as we deal with it later. */ |
3dab1dad | 4724 | if (PL_regkind[OP(first)] == EXACT) { |
1aa99e6b | 4725 | if (OP(first) == EXACT) |
6f207bd3 | 4726 | NOOP; /* Empty, get anchored substr later. */ |
1aa99e6b | 4727 | else if ((OP(first) == EXACTF || OP(first) == EXACTFL)) |
f8fc2ecf | 4728 | ri->regstclass = first; |
b3c9acc1 | 4729 | } |
07be1b83 | 4730 | #ifdef TRIE_STCLASS |
786e8c11 | 4731 | else if (PL_regkind[OP(first)] == TRIE && |
f8fc2ecf | 4732 | ((reg_trie_data *)ri->data->data[ ARG(first) ])->minlen>0) |
07be1b83 | 4733 | { |
786e8c11 | 4734 | regnode *trie_op; |
07be1b83 | 4735 | /* this can happen only on restudy */ |
786e8c11 | 4736 | if ( OP(first) == TRIE ) { |
c944940b | 4737 | struct regnode_1 *trieop = (struct regnode_1 *) |
446bd890 | 4738 | PerlMemShared_calloc(1, sizeof(struct regnode_1)); |
786e8c11 YO |
4739 | StructCopy(first,trieop,struct regnode_1); |
4740 | trie_op=(regnode *)trieop; | |
4741 | } else { | |
c944940b | 4742 | struct regnode_charclass *trieop = (struct regnode_charclass *) |
446bd890 | 4743 | PerlMemShared_calloc(1, sizeof(struct regnode_charclass)); |
786e8c11 YO |
4744 | StructCopy(first,trieop,struct regnode_charclass); |
4745 | trie_op=(regnode *)trieop; | |
4746 | } | |
1de06328 | 4747 | OP(trie_op)+=2; |
786e8c11 | 4748 | make_trie_failtable(pRExC_state, (regnode *)first, trie_op, 0); |
f8fc2ecf | 4749 | ri->regstclass = trie_op; |
07be1b83 YO |
4750 | } |
4751 | #endif | |
e52fc539 | 4752 | else if (REGNODE_SIMPLE(OP(first))) |
f8fc2ecf | 4753 | ri->regstclass = first; |
3dab1dad YO |
4754 | else if (PL_regkind[OP(first)] == BOUND || |
4755 | PL_regkind[OP(first)] == NBOUND) | |
f8fc2ecf | 4756 | ri->regstclass = first; |
3dab1dad | 4757 | else if (PL_regkind[OP(first)] == BOL) { |
bbe252da YO |
4758 | r->extflags |= (OP(first) == MBOL |
4759 | ? RXf_ANCH_MBOL | |
cad2e5aa | 4760 | : (OP(first) == SBOL |
bbe252da YO |
4761 | ? RXf_ANCH_SBOL |
4762 | : RXf_ANCH_BOL)); | |
a0d0e21e | 4763 | first = NEXTOPER(first); |
774d564b | 4764 | goto again; |
4765 | } | |
4766 | else if (OP(first) == GPOS) { | |
bbe252da | 4767 | r->extflags |= RXf_ANCH_GPOS; |
774d564b | 4768 | first = NEXTOPER(first); |
4769 | goto again; | |
a0d0e21e | 4770 | } |
cf2a2b69 YO |
4771 | else if ((!sawopen || !RExC_sawback) && |
4772 | (OP(first) == STAR && | |
3dab1dad | 4773 | PL_regkind[OP(NEXTOPER(first))] == REG_ANY) && |
bbe252da | 4774 | !(r->extflags & RXf_ANCH) && !(RExC_seen & REG_SEEN_EVAL)) |
a0d0e21e LW |
4775 | { |
4776 | /* turn .* into ^.* with an implied $*=1 */ | |
1df70142 AL |
4777 | const int type = |
4778 | (OP(NEXTOPER(first)) == REG_ANY) | |
bbe252da YO |
4779 | ? RXf_ANCH_MBOL |
4780 | : RXf_ANCH_SBOL; | |
4781 | r->extflags |= type; | |
4782 | r->intflags |= PREGf_IMPLICIT; | |
a0d0e21e | 4783 | first = NEXTOPER(first); |
774d564b | 4784 | goto again; |
a0d0e21e | 4785 | } |
e7f38d0f | 4786 | if (sawplus && !sawlookahead && (!sawopen || !RExC_sawback) |
830247a4 | 4787 | && !(RExC_seen & REG_SEEN_EVAL)) /* May examine pos and $& */ |
cad2e5aa | 4788 | /* x+ must match at the 1st pos of run of x's */ |
bbe252da | 4789 | r->intflags |= PREGf_SKIP; |
a0d0e21e | 4790 | |
c277df42 | 4791 | /* Scan is after the zeroth branch, first is atomic matcher. */ |
be8e71aa | 4792 | #ifdef TRIE_STUDY_OPT |
81714fb9 | 4793 | DEBUG_PARSE_r( |
be8e71aa YO |
4794 | if (!restudied) |
4795 | PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n", | |
4796 | (IV)(first - scan + 1)) | |
4797 | ); | |
4798 | #else | |
81714fb9 | 4799 | DEBUG_PARSE_r( |
be8e71aa YO |
4800 | PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n", |
4801 | (IV)(first - scan + 1)) | |
4802 | ); | |
4803 | #endif | |
4804 | ||
4805 | ||
a0d0e21e LW |
4806 | /* |
4807 | * If there's something expensive in the r.e., find the | |
4808 | * longest literal string that must appear and make it the | |
4809 | * regmust. Resolve ties in favor of later strings, since | |
4810 | * the regstart check works with the beginning of the r.e. | |
4811 | * and avoiding duplication strengthens checking. Not a | |
4812 | * strong reason, but sufficient in the absence of others. | |
4813 | * [Now we resolve ties in favor of the earlier string if | |
c277df42 | 4814 | * it happens that c_offset_min has been invalidated, since the |
a0d0e21e LW |
4815 | * earlier string may buy us something the later one won't.] |
4816 | */ | |
de8c5301 | 4817 | |
396482e1 GA |
4818 | data.longest_fixed = newSVpvs(""); |
4819 | data.longest_float = newSVpvs(""); | |
4820 | data.last_found = newSVpvs(""); | |
c277df42 IZ |
4821 | data.longest = &(data.longest_fixed); |
4822 | first = scan; | |
f8fc2ecf | 4823 | if (!ri->regstclass) { |
830247a4 | 4824 | cl_init(pRExC_state, &ch_class); |
653099ff GS |
4825 | data.start_class = &ch_class; |
4826 | stclass_flag = SCF_DO_STCLASS_AND; | |
4827 | } else /* XXXX Check for BOUND? */ | |
4828 | stclass_flag = 0; | |
cb434fcc | 4829 | data.last_closep = &last_close; |
de8c5301 | 4830 | |
1de06328 | 4831 | minlen = study_chunk(pRExC_state, &first, &minlen, &fake, scan + RExC_size, /* Up to end */ |
40d049e4 YO |
4832 | &data, -1, NULL, NULL, |
4833 | SCF_DO_SUBSTR | SCF_WHILEM_VISITED_POS | stclass_flag,0); | |
07be1b83 | 4834 | |
07be1b83 | 4835 | |
786e8c11 YO |
4836 | CHECK_RESTUDY_GOTO; |
4837 | ||
4838 | ||
830247a4 | 4839 | if ( RExC_npar == 1 && data.longest == &(data.longest_fixed) |
b81d288d | 4840 | && data.last_start_min == 0 && data.last_end > 0 |
830247a4 | 4841 | && !RExC_seen_zerolen |
2bf803e2 | 4842 | && !(RExC_seen & REG_SEEN_VERBARG) |
bbe252da YO |
4843 | && (!(RExC_seen & REG_SEEN_GPOS) || (r->extflags & RXf_ANCH_GPOS))) |
4844 | r->extflags |= RXf_CHECK_ALL; | |
304ee84b | 4845 | scan_commit(pRExC_state, &data,&minlen,0); |
c277df42 IZ |
4846 | SvREFCNT_dec(data.last_found); |
4847 | ||
1de06328 YO |
4848 | /* Note that code very similar to this but for anchored string |
4849 | follows immediately below, changes may need to be made to both. | |
4850 | Be careful. | |
4851 | */ | |
a0ed51b3 | 4852 | longest_float_length = CHR_SVLEN(data.longest_float); |
c5254dd6 | 4853 | if (longest_float_length |
c277df42 IZ |
4854 | || (data.flags & SF_FL_BEFORE_EOL |
4855 | && (!(data.flags & SF_FL_BEFORE_MEOL) | |
bbe252da | 4856 | || (RExC_flags & RXf_PMf_MULTILINE)))) |
1de06328 | 4857 | { |
1182767e | 4858 | I32 t,ml; |
cf93c79d | 4859 | |
1de06328 | 4860 | if (SvCUR(data.longest_fixed) /* ok to leave SvCUR */ |
aca2d497 IZ |
4861 | && data.offset_fixed == data.offset_float_min |
4862 | && SvCUR(data.longest_fixed) == SvCUR(data.longest_float)) | |
4863 | goto remove_float; /* As in (a)+. */ | |
4864 | ||
1de06328 YO |
4865 | /* copy the information about the longest float from the reg_scan_data |
4866 | over to the program. */ | |
33b8afdf JH |
4867 | if (SvUTF8(data.longest_float)) { |
4868 | r->float_utf8 = data.longest_float; | |
c445ea15 | 4869 | r->float_substr = NULL; |
33b8afdf JH |
4870 | } else { |
4871 | r->float_substr = data.longest_float; | |
c445ea15 | 4872 | r->float_utf8 = NULL; |
33b8afdf | 4873 | } |
1de06328 YO |
4874 | /* float_end_shift is how many chars that must be matched that |
4875 | follow this item. We calculate it ahead of time as once the | |
4876 | lookbehind offset is added in we lose the ability to correctly | |
4877 | calculate it.*/ | |
4878 | ml = data.minlen_float ? *(data.minlen_float) | |
1182767e | 4879 | : (I32)longest_float_length; |
1de06328 YO |
4880 | r->float_end_shift = ml - data.offset_float_min |
4881 | - longest_float_length + (SvTAIL(data.longest_float) != 0) | |
4882 | + data.lookbehind_float; | |
4883 | r->float_min_offset = data.offset_float_min - data.lookbehind_float; | |
c277df42 | 4884 | r->float_max_offset = data.offset_float_max; |
1182767e | 4885 | if (data.offset_float_max < I32_MAX) /* Don't offset infinity */ |
1de06328 YO |
4886 | r->float_max_offset -= data.lookbehind_float; |
4887 | ||
cf93c79d IZ |
4888 | t = (data.flags & SF_FL_BEFORE_EOL /* Can't have SEOL and MULTI */ |
4889 | && (!(data.flags & SF_FL_BEFORE_MEOL) | |
bbe252da | 4890 | || (RExC_flags & RXf_PMf_MULTILINE))); |
33b8afdf | 4891 | fbm_compile(data.longest_float, t ? FBMcf_TAIL : 0); |
a0ed51b3 LW |
4892 | } |
4893 | else { | |
aca2d497 | 4894 | remove_float: |
c445ea15 | 4895 | r->float_substr = r->float_utf8 = NULL; |
c277df42 | 4896 | SvREFCNT_dec(data.longest_float); |
c5254dd6 | 4897 | longest_float_length = 0; |
a0d0e21e | 4898 | } |
c277df42 | 4899 | |
1de06328 YO |
4900 | /* Note that code very similar to this but for floating string |
4901 | is immediately above, changes may need to be made to both. | |
4902 | Be careful. | |
4903 | */ | |
a0ed51b3 | 4904 | longest_fixed_length = CHR_SVLEN(data.longest_fixed); |
c5254dd6 | 4905 | if (longest_fixed_length |
c277df42 IZ |
4906 | || (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */ |
4907 | && (!(data.flags & SF_FIX_BEFORE_MEOL) | |
bbe252da | 4908 | || (RExC_flags & RXf_PMf_MULTILINE)))) |
1de06328 | 4909 | { |
1182767e | 4910 | I32 t,ml; |
cf93c79d | 4911 | |
1de06328 YO |
4912 | /* copy the information about the longest fixed |
4913 | from the reg_scan_data over to the program. */ | |
33b8afdf JH |
4914 | if (SvUTF8(data.longest_fixed)) { |
4915 | r->anchored_utf8 = data.longest_fixed; | |
c445ea15 | 4916 | r->anchored_substr = NULL; |
33b8afdf JH |
4917 | } else { |
4918 | r->anchored_substr = data.longest_fixed; | |
c445ea15 | 4919 | r->anchored_utf8 = NULL; |
33b8afdf | 4920 | } |
1de06328 YO |
4921 | /* fixed_end_shift is how many chars that must be matched that |
4922 | follow this item. We calculate it ahead of time as once the | |
4923 | lookbehind offset is added in we lose the ability to correctly | |
4924 | calculate it.*/ | |
4925 | ml = data.minlen_fixed ? *(data.minlen_fixed) | |
1182767e | 4926 | : (I32)longest_fixed_length; |
1de06328 YO |
4927 | r->anchored_end_shift = ml - data.offset_fixed |
4928 | - longest_fixed_length + (SvTAIL(data.longest_fixed) != 0) | |
4929 | + data.lookbehind_fixed; | |
4930 | r->anchored_offset = data.offset_fixed - data.lookbehind_fixed; | |
4931 | ||
cf93c79d IZ |
4932 | t = (data.flags & SF_FIX_BEFORE_EOL /* Can't have SEOL and MULTI */ |
4933 | && (!(data.flags & SF_FIX_BEFORE_MEOL) | |
bbe252da | 4934 | || (RExC_flags & RXf_PMf_MULTILINE))); |
33b8afdf | 4935 | fbm_compile(data.longest_fixed, t ? FBMcf_TAIL : 0); |
a0ed51b3 LW |
4936 | } |
4937 | else { | |
c445ea15 | 4938 | r->anchored_substr = r->anchored_utf8 = NULL; |
c277df42 | 4939 | SvREFCNT_dec(data.longest_fixed); |
c5254dd6 | 4940 | longest_fixed_length = 0; |
a0d0e21e | 4941 | } |
f8fc2ecf YO |
4942 | if (ri->regstclass |
4943 | && (OP(ri->regstclass) == REG_ANY || OP(ri->regstclass) == SANY)) | |
4944 | ri->regstclass = NULL; | |
33b8afdf JH |
4945 | if ((!(r->anchored_substr || r->anchored_utf8) || r->anchored_offset) |
4946 | && stclass_flag | |
653099ff | 4947 | && !(data.start_class->flags & ANYOF_EOS) |
eb160463 GS |
4948 | && !cl_is_anything(data.start_class)) |
4949 | { | |
2eccd3b2 | 4950 | const U32 n = add_data(pRExC_state, 1, "f"); |
653099ff | 4951 | |
f8fc2ecf | 4952 | Newx(RExC_rxi->data->data[n], 1, |
653099ff GS |
4953 | struct regnode_charclass_class); |
4954 | StructCopy(data.start_class, | |
f8fc2ecf | 4955 | (struct regnode_charclass_class*)RExC_rxi->data->data[n], |
653099ff | 4956 | struct regnode_charclass_class); |
f8fc2ecf | 4957 | ri->regstclass = (regnode*)RExC_rxi->data->data[n]; |
bbe252da | 4958 | r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */ |
a3621e74 | 4959 | DEBUG_COMPILE_r({ SV *sv = sv_newmortal(); |
32fc9b6a | 4960 | regprop(r, sv, (regnode*)data.start_class); |
9c5ffd7c | 4961 | PerlIO_printf(Perl_debug_log, |
a0288114 | 4962 | "synthetic stclass \"%s\".\n", |
3f7c398e | 4963 | SvPVX_const(sv));}); |
653099ff | 4964 | } |
c277df42 IZ |
4965 | |
4966 | /* A temporary algorithm prefers floated substr to fixed one to dig more info. */ | |
c5254dd6 | 4967 | if (longest_fixed_length > longest_float_length) { |
1de06328 | 4968 | r->check_end_shift = r->anchored_end_shift; |
c277df42 | 4969 | r->check_substr = r->anchored_substr; |
33b8afdf | 4970 | r->check_utf8 = r->anchored_utf8; |
c277df42 | 4971 | r->check_offset_min = r->check_offset_max = r->anchored_offset; |
bbe252da YO |
4972 | if (r->extflags & RXf_ANCH_SINGLE) |
4973 | r->extflags |= RXf_NOSCAN; | |
a0ed51b3 LW |
4974 | } |
4975 | else { | |
1de06328 | 4976 | r->check_end_shift = r->float_end_shift; |
c277df42 | 4977 | r->check_substr = r->float_substr; |
33b8afdf | 4978 | r->check_utf8 = r->float_utf8; |
1de06328 YO |
4979 | r->check_offset_min = r->float_min_offset; |
4980 | r->check_offset_max = r->float_max_offset; | |
a0d0e21e | 4981 | } |
30382c73 IZ |
4982 | /* XXXX Currently intuiting is not compatible with ANCH_GPOS. |
4983 | This should be changed ASAP! */ | |
bbe252da YO |
4984 | if ((r->check_substr || r->check_utf8) && !(r->extflags & RXf_ANCH_GPOS)) { |
4985 | r->extflags |= RXf_USE_INTUIT; | |
33b8afdf | 4986 | if (SvTAIL(r->check_substr ? r->check_substr : r->check_utf8)) |
bbe252da | 4987 | r->extflags |= RXf_INTUIT_TAIL; |
cad2e5aa | 4988 | } |
1de06328 YO |
4989 | /* XXX Unneeded? dmq (shouldn't as this is handled elsewhere) |
4990 | if ( (STRLEN)minlen < longest_float_length ) | |
4991 | minlen= longest_float_length; | |
4992 | if ( (STRLEN)minlen < longest_fixed_length ) | |
4993 | minlen= longest_fixed_length; | |
4994 | */ | |
a0ed51b3 LW |
4995 | } |
4996 | else { | |
c277df42 IZ |
4997 | /* Several toplevels. Best we can is to set minlen. */ |
4998 | I32 fake; | |
653099ff | 4999 | struct regnode_charclass_class ch_class; |
cb434fcc | 5000 | I32 last_close = 0; |
c277df42 | 5001 | |
5d458dd8 | 5002 | DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "\nMulti Top Level\n")); |
07be1b83 | 5003 | |
f8fc2ecf | 5004 | scan = ri->program + 1; |
830247a4 | 5005 | cl_init(pRExC_state, &ch_class); |
653099ff | 5006 | data.start_class = &ch_class; |
cb434fcc | 5007 | data.last_closep = &last_close; |
07be1b83 | 5008 | |
de8c5301 | 5009 | |
1de06328 | 5010 | minlen = study_chunk(pRExC_state, &scan, &minlen, &fake, scan + RExC_size, |
40d049e4 | 5011 | &data, -1, NULL, NULL, SCF_DO_STCLASS_AND|SCF_WHILEM_VISITED_POS,0); |
de8c5301 | 5012 | |
786e8c11 | 5013 | CHECK_RESTUDY_GOTO; |
07be1b83 | 5014 | |
33b8afdf | 5015 | r->check_substr = r->check_utf8 = r->anchored_substr = r->anchored_utf8 |
c445ea15 | 5016 | = r->float_substr = r->float_utf8 = NULL; |
653099ff | 5017 | if (!(data.start_class->flags & ANYOF_EOS) |
eb160463 GS |
5018 | && !cl_is_anything(data.start_class)) |
5019 | { | |
2eccd3b2 | 5020 | const U32 n = add_data(pRExC_state, 1, "f"); |
653099ff | 5021 | |
f8fc2ecf | 5022 | Newx(RExC_rxi->data->data[n], 1, |
653099ff GS |
5023 | struct regnode_charclass_class); |
5024 | StructCopy(data.start_class, | |
f8fc2ecf | 5025 | (struct regnode_charclass_class*)RExC_rxi->data->data[n], |
653099ff | 5026 | struct regnode_charclass_class); |
f8fc2ecf | 5027 | ri->regstclass = (regnode*)RExC_rxi->data->data[n]; |
bbe252da | 5028 | r->intflags &= ~PREGf_SKIP; /* Used in find_byclass(). */ |
a3621e74 | 5029 | DEBUG_COMPILE_r({ SV* sv = sv_newmortal(); |
32fc9b6a | 5030 | regprop(r, sv, (regnode*)data.start_class); |
9c5ffd7c | 5031 | PerlIO_printf(Perl_debug_log, |
a0288114 | 5032 | "synthetic stclass \"%s\".\n", |
3f7c398e | 5033 | SvPVX_const(sv));}); |
653099ff | 5034 | } |
a0d0e21e LW |
5035 | } |
5036 | ||
1de06328 YO |
5037 | /* Guard against an embedded (?=) or (?<=) with a longer minlen than |
5038 | the "real" pattern. */ | |
cf9788e3 RGS |
5039 | DEBUG_OPTIMISE_r({ |
5040 | PerlIO_printf(Perl_debug_log,"minlen: %"IVdf" r->minlen:%"IVdf"\n", | |
70685ca0 | 5041 | (IV)minlen, (IV)r->minlen); |
cf9788e3 | 5042 | }); |
de8c5301 | 5043 | r->minlenret = minlen; |
1de06328 YO |
5044 | if (r->minlen < minlen) |
5045 | r->minlen = minlen; | |
5046 | ||
b81d288d | 5047 | if (RExC_seen & REG_SEEN_GPOS) |
bbe252da | 5048 | r->extflags |= RXf_GPOS_SEEN; |
830247a4 | 5049 | if (RExC_seen & REG_SEEN_LOOKBEHIND) |
bbe252da | 5050 | r->extflags |= RXf_LOOKBEHIND_SEEN; |
830247a4 | 5051 | if (RExC_seen & REG_SEEN_EVAL) |
bbe252da | 5052 | r->extflags |= RXf_EVAL_SEEN; |
f33976b4 | 5053 | if (RExC_seen & REG_SEEN_CANY) |
bbe252da | 5054 | r->extflags |= RXf_CANY_SEEN; |
e2e6a0f1 | 5055 | if (RExC_seen & REG_SEEN_VERBARG) |
bbe252da | 5056 | r->intflags |= PREGf_VERBARG_SEEN; |
5d458dd8 | 5057 | if (RExC_seen & REG_SEEN_CUTGROUP) |
bbe252da | 5058 | r->intflags |= PREGf_CUTGROUP_SEEN; |
81714fb9 | 5059 | if (RExC_paren_names) |
85fbaab2 | 5060 | RXp_PAREN_NAMES(r) = MUTABLE_HV(SvREFCNT_inc(RExC_paren_names)); |
81714fb9 | 5061 | else |
5daac39c | 5062 | RXp_PAREN_NAMES(r) = NULL; |
0ac6acae | 5063 | |
7bd1e614 | 5064 | #ifdef STUPID_PATTERN_CHECKS |
5509d87a | 5065 | if (RX_PRELEN(rx) == 0) |
640f820d | 5066 | r->extflags |= RXf_NULL; |
5509d87a | 5067 | if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ') |
0ac6acae AB |
5068 | /* XXX: this should happen BEFORE we compile */ |
5069 | r->extflags |= (RXf_SKIPWHITE|RXf_WHITE); | |
5509d87a | 5070 | else if (RX_PRELEN(rx) == 3 && memEQ("\\s+", RX_PRECOMP(rx), 3)) |
0ac6acae | 5071 | r->extflags |= RXf_WHITE; |
5509d87a | 5072 | else if (RX_PRELEN(rx) == 1 && RXp_PRECOMP(rx)[0] == '^') |
e357fc67 | 5073 | r->extflags |= RXf_START_ONLY; |
f1b875a0 | 5074 | #else |
5509d87a | 5075 | if (r->extflags & RXf_SPLIT && RX_PRELEN(rx) == 1 && RX_PRECOMP(rx)[0] == ' ') |
7bd1e614 YO |
5076 | /* XXX: this should happen BEFORE we compile */ |
5077 | r->extflags |= (RXf_SKIPWHITE|RXf_WHITE); | |
5078 | else { | |
5079 | regnode *first = ri->program + 1; | |
39aa8307 JH |
5080 | U8 fop = OP(first); |
5081 | U8 nop = OP(NEXTOPER(first)); | |
7bd1e614 | 5082 | |
640f820d AB |
5083 | if (PL_regkind[fop] == NOTHING && nop == END) |
5084 | r->extflags |= RXf_NULL; | |
5085 | else if (PL_regkind[fop] == BOL && nop == END) | |
7bd1e614 YO |
5086 | r->extflags |= RXf_START_ONLY; |
5087 | else if (fop == PLUS && nop ==SPACE && OP(regnext(first))==END) | |
5088 | r->extflags |= RXf_WHITE; | |
5089 | } | |
f1b875a0 | 5090 | #endif |
1f1031fe YO |
5091 | #ifdef DEBUGGING |
5092 | if (RExC_paren_names) { | |
af534a04 | 5093 | ri->name_list_idx = add_data( pRExC_state, 1, "a" ); |
1f1031fe YO |
5094 | ri->data->data[ri->name_list_idx] = (void*)SvREFCNT_inc(RExC_paren_name_list); |
5095 | } else | |
1f1031fe | 5096 | #endif |
cde0cee5 | 5097 | ri->name_list_idx = 0; |
1f1031fe | 5098 | |
40d049e4 YO |
5099 | if (RExC_recurse_count) { |
5100 | for ( ; RExC_recurse_count ; RExC_recurse_count-- ) { | |
5101 | const regnode *scan = RExC_recurse[RExC_recurse_count-1]; | |
5102 | ARG2L_SET( scan, RExC_open_parens[ARG(scan)-1] - scan ); | |
5103 | } | |
5104 | } | |
f0ab9afb | 5105 | Newxz(r->offs, RExC_npar, regexp_paren_pair); |
c74340f9 YO |
5106 | /* assume we don't need to swap parens around before we match */ |
5107 | ||
be8e71aa YO |
5108 | DEBUG_DUMP_r({ |
5109 | PerlIO_printf(Perl_debug_log,"Final program:\n"); | |
3dab1dad YO |
5110 | regdump(r); |
5111 | }); | |
7122b237 YO |
5112 | #ifdef RE_TRACK_PATTERN_OFFSETS |
5113 | DEBUG_OFFSETS_r(if (ri->u.offsets) { | |
5114 | const U32 len = ri->u.offsets[0]; | |
8e9a8a48 YO |
5115 | U32 i; |
5116 | GET_RE_DEBUG_FLAGS_DECL; | |
7122b237 | 5117 | PerlIO_printf(Perl_debug_log, "Offsets: [%"UVuf"]\n\t", (UV)ri->u.offsets[0]); |
8e9a8a48 | 5118 | for (i = 1; i <= len; i++) { |
7122b237 | 5119 | if (ri->u.offsets[i*2-1] || ri->u.offsets[i*2]) |
8e9a8a48 | 5120 | PerlIO_printf(Perl_debug_log, "%"UVuf":%"UVuf"[%"UVuf"] ", |
7122b237 | 5121 | (UV)i, (UV)ri->u.offsets[i*2-1], (UV)ri->u.offsets[i*2]); |
8e9a8a48 YO |
5122 | } |
5123 | PerlIO_printf(Perl_debug_log, "\n"); | |
5124 | }); | |
7122b237 | 5125 | #endif |
288b8c02 | 5126 | return rx; |
a687059c LW |
5127 | } |
5128 | ||
f9f4320a | 5129 | #undef RE_ENGINE_PTR |
3dab1dad | 5130 | |
93b32b6d | 5131 | |
81714fb9 | 5132 | SV* |
192b9cd1 AB |
5133 | Perl_reg_named_buff(pTHX_ REGEXP * const rx, SV * const key, SV * const value, |
5134 | const U32 flags) | |
5135 | { | |
7918f24d NC |
5136 | PERL_ARGS_ASSERT_REG_NAMED_BUFF; |
5137 | ||
192b9cd1 AB |
5138 | PERL_UNUSED_ARG(value); |
5139 | ||
f1b875a0 | 5140 | if (flags & RXapif_FETCH) { |
192b9cd1 | 5141 | return reg_named_buff_fetch(rx, key, flags); |
f1b875a0 | 5142 | } else if (flags & (RXapif_STORE | RXapif_DELETE | RXapif_CLEAR)) { |
6ad8f254 | 5143 | Perl_croak_no_modify(aTHX); |
192b9cd1 | 5144 | return NULL; |
f1b875a0 | 5145 | } else if (flags & RXapif_EXISTS) { |
192b9cd1 AB |
5146 | return reg_named_buff_exists(rx, key, flags) |
5147 | ? &PL_sv_yes | |
5148 | : &PL_sv_no; | |
f1b875a0 | 5149 | } else if (flags & RXapif_REGNAMES) { |
192b9cd1 | 5150 | return reg_named_buff_all(rx, flags); |
f1b875a0 | 5151 | } else if (flags & (RXapif_SCALAR | RXapif_REGNAMES_COUNT)) { |
192b9cd1 AB |
5152 | return reg_named_buff_scalar(rx, flags); |
5153 | } else { | |
5154 | Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff", (int)flags); | |
5155 | return NULL; | |
5156 | } | |
5157 | } | |
5158 | ||
5159 | SV* | |
5160 | Perl_reg_named_buff_iter(pTHX_ REGEXP * const rx, const SV * const lastkey, | |
5161 | const U32 flags) | |
5162 | { | |
7918f24d | 5163 | PERL_ARGS_ASSERT_REG_NAMED_BUFF_ITER; |
192b9cd1 AB |
5164 | PERL_UNUSED_ARG(lastkey); |
5165 | ||
f1b875a0 | 5166 | if (flags & RXapif_FIRSTKEY) |
192b9cd1 | 5167 | return reg_named_buff_firstkey(rx, flags); |
f1b875a0 | 5168 | else if (flags & RXapif_NEXTKEY) |
192b9cd1 AB |
5169 | return reg_named_buff_nextkey(rx, flags); |
5170 | else { | |
5171 | Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_iter", (int)flags); | |
5172 | return NULL; | |
5173 | } | |
5174 | } | |
5175 | ||
5176 | SV* | |
288b8c02 NC |
5177 | Perl_reg_named_buff_fetch(pTHX_ REGEXP * const r, SV * const namesv, |
5178 | const U32 flags) | |
81714fb9 | 5179 | { |
44a2ac75 YO |
5180 | AV *retarray = NULL; |
5181 | SV *ret; | |
288b8c02 | 5182 | struct regexp *const rx = (struct regexp *)SvANY(r); |
7918f24d NC |
5183 | |
5184 | PERL_ARGS_ASSERT_REG_NAMED_BUFF_FETCH; | |
5185 | ||
f1b875a0 | 5186 | if (flags & RXapif_ALL) |
44a2ac75 | 5187 | retarray=newAV(); |
93b32b6d | 5188 | |
5daac39c NC |
5189 | if (rx && RXp_PAREN_NAMES(rx)) { |
5190 | HE *he_str = hv_fetch_ent( RXp_PAREN_NAMES(rx), namesv, 0, 0 ); | |
93b32b6d YO |
5191 | if (he_str) { |
5192 | IV i; | |
5193 | SV* sv_dat=HeVAL(he_str); | |
5194 | I32 *nums=(I32*)SvPVX(sv_dat); | |
5195 | for ( i=0; i<SvIVX(sv_dat); i++ ) { | |
192b9cd1 AB |
5196 | if ((I32)(rx->nparens) >= nums[i] |
5197 | && rx->offs[nums[i]].start != -1 | |
5198 | && rx->offs[nums[i]].end != -1) | |
93b32b6d | 5199 | { |
49d7dfbc | 5200 | ret = newSVpvs(""); |
288b8c02 | 5201 | CALLREG_NUMBUF_FETCH(r,nums[i],ret); |
93b32b6d YO |
5202 | if (!retarray) |
5203 | return ret; | |
5204 | } else { | |
5205 | ret = newSVsv(&PL_sv_undef); | |
5206 | } | |
ec83ea38 | 5207 | if (retarray) |
93b32b6d | 5208 | av_push(retarray, ret); |
81714fb9 | 5209 | } |
93b32b6d | 5210 | if (retarray) |
ad64d0ec | 5211 | return newRV_noinc(MUTABLE_SV(retarray)); |
192b9cd1 AB |
5212 | } |
5213 | } | |
5214 | return NULL; | |
5215 | } | |
5216 | ||
5217 | bool | |
288b8c02 | 5218 | Perl_reg_named_buff_exists(pTHX_ REGEXP * const r, SV * const key, |
192b9cd1 AB |
5219 | const U32 flags) |
5220 | { | |
288b8c02 | 5221 | struct regexp *const rx = (struct regexp *)SvANY(r); |
7918f24d NC |
5222 | |
5223 | PERL_ARGS_ASSERT_REG_NAMED_BUFF_EXISTS; | |
5224 | ||
5daac39c | 5225 | if (rx && RXp_PAREN_NAMES(rx)) { |
f1b875a0 | 5226 | if (flags & RXapif_ALL) { |
5daac39c | 5227 | return hv_exists_ent(RXp_PAREN_NAMES(rx), key, 0); |
192b9cd1 | 5228 | } else { |
288b8c02 | 5229 | SV *sv = CALLREG_NAMED_BUFF_FETCH(r, key, flags); |
6499cc01 RGS |
5230 | if (sv) { |
5231 | SvREFCNT_dec(sv); | |
192b9cd1 AB |
5232 | return TRUE; |
5233 | } else { | |
5234 | return FALSE; | |
5235 | } | |
5236 | } | |
5237 | } else { | |
5238 | return FALSE; | |
5239 | } | |
5240 | } | |
5241 | ||
5242 | SV* | |
288b8c02 | 5243 | Perl_reg_named_buff_firstkey(pTHX_ REGEXP * const r, const U32 flags) |
192b9cd1 | 5244 | { |
288b8c02 | 5245 | struct regexp *const rx = (struct regexp *)SvANY(r); |
7918f24d NC |
5246 | |
5247 | PERL_ARGS_ASSERT_REG_NAMED_BUFF_FIRSTKEY; | |
5248 | ||
5daac39c NC |
5249 | if ( rx && RXp_PAREN_NAMES(rx) ) { |
5250 | (void)hv_iterinit(RXp_PAREN_NAMES(rx)); | |
192b9cd1 | 5251 | |
288b8c02 | 5252 | return CALLREG_NAMED_BUFF_NEXTKEY(r, NULL, flags & ~RXapif_FIRSTKEY); |
1e1d4b91 JJ |
5253 | } else { |
5254 | return FALSE; | |
5255 | } | |
192b9cd1 AB |
5256 | } |
5257 | ||
5258 | SV* | |
288b8c02 | 5259 | Perl_reg_named_buff_nextkey(pTHX_ REGEXP * const r, const U32 flags) |
192b9cd1 | 5260 | { |
288b8c02 | 5261 | struct regexp *const rx = (struct regexp *)SvANY(r); |
250257bb | 5262 | GET_RE_DEBUG_FLAGS_DECL; |
7918f24d NC |
5263 | |
5264 | PERL_ARGS_ASSERT_REG_NAMED_BUFF_NEXTKEY; | |
5265 | ||
5daac39c NC |
5266 | if (rx && RXp_PAREN_NAMES(rx)) { |
5267 | HV *hv = RXp_PAREN_NAMES(rx); | |
192b9cd1 AB |
5268 | HE *temphe; |
5269 | while ( (temphe = hv_iternext_flags(hv,0)) ) { | |
5270 | IV i; | |
5271 | IV parno = 0; | |
5272 | SV* sv_dat = HeVAL(temphe); | |
5273 | I32 *nums = (I32*)SvPVX(sv_dat); | |
5274 | for ( i = 0; i < SvIVX(sv_dat); i++ ) { | |
250257bb | 5275 | if ((I32)(rx->lastparen) >= nums[i] && |
192b9cd1 AB |
5276 | rx->offs[nums[i]].start != -1 && |
5277 | rx->offs[nums[i]].end != -1) | |
5278 | { | |
5279 | parno = nums[i]; | |
5280 | break; | |
5281 | } | |
5282 | } | |
f1b875a0 | 5283 | if (parno || flags & RXapif_ALL) { |
a663657d | 5284 | return newSVhek(HeKEY_hek(temphe)); |
192b9cd1 | 5285 | } |
81714fb9 YO |
5286 | } |
5287 | } | |
44a2ac75 YO |
5288 | return NULL; |
5289 | } | |
5290 | ||
192b9cd1 | 5291 | SV* |
288b8c02 | 5292 | Perl_reg_named_buff_scalar(pTHX_ REGEXP * const r, const U32 flags) |
192b9cd1 AB |
5293 | { |
5294 | SV *ret; | |
5295 | AV *av; | |
5296 | I32 length; | |
288b8c02 | 5297 | struct regexp *const rx = (struct regexp *)SvANY(r); |
192b9cd1 | 5298 | |
7918f24d NC |
5299 | PERL_ARGS_ASSERT_REG_NAMED_BUFF_SCALAR; |
5300 | ||
5daac39c | 5301 | if (rx && RXp_PAREN_NAMES(rx)) { |
f1b875a0 | 5302 | if (flags & (RXapif_ALL | RXapif_REGNAMES_COUNT)) { |
5daac39c | 5303 | return newSViv(HvTOTALKEYS(RXp_PAREN_NAMES(rx))); |
f1b875a0 | 5304 | } else if (flags & RXapif_ONE) { |
288b8c02 | 5305 | ret = CALLREG_NAMED_BUFF_ALL(r, (flags | RXapif_REGNAMES)); |
502c6561 | 5306 | av = MUTABLE_AV(SvRV(ret)); |
192b9cd1 | 5307 | length = av_len(av); |
ec83ea38 | 5308 | SvREFCNT_dec(ret); |
192b9cd1 AB |
5309 | return newSViv(length + 1); |
5310 | } else { | |
5311 | Perl_croak(aTHX_ "panic: Unknown flags %d in named_buff_scalar", (int)flags); | |
5312 | return NULL; | |
5313 | } | |
5314 | } | |
5315 | return &PL_sv_undef; | |
5316 | } | |
5317 | ||
5318 | SV* | |
288b8c02 | 5319 | Perl_reg_named_buff_all(pTHX_ REGEXP * const r, const U32 flags) |
192b9cd1 | 5320 | { |
288b8c02 | 5321 | struct regexp *const rx = (struct regexp *)SvANY(r); |
192b9cd1 AB |
5322 | AV *av = newAV(); |
5323 | ||
7918f24d NC |
5324 | PERL_ARGS_ASSERT_REG_NAMED_BUFF_ALL; |
5325 | ||
5daac39c NC |
5326 | if (rx && RXp_PAREN_NAMES(rx)) { |
5327 | HV *hv= RXp_PAREN_NAMES(rx); | |
192b9cd1 AB |
5328 | HE *temphe; |
5329 | (void)hv_iterinit(hv); | |
5330 | while ( (temphe = hv_iternext_flags(hv,0)) ) { | |
5331 | IV i; | |
5332 | IV parno = 0; | |
5333 | SV* sv_dat = HeVAL(temphe); | |
5334 | I32 *nums = (I32*)SvPVX(sv_dat); | |
5335 | for ( i = 0; i < SvIVX(sv_dat); i++ ) { | |
250257bb | 5336 | if ((I32)(rx->lastparen) >= nums[i] && |
192b9cd1 AB |
5337 | rx->offs[nums[i]].start != -1 && |
5338 | rx->offs[nums[i]].end != -1) | |
5339 | { | |
5340 | parno = nums[i]; | |
5341 | break; | |
5342 | } | |
5343 | } | |
f1b875a0 | 5344 | if (parno || flags & RXapif_ALL) { |
a663657d | 5345 | av_push(av, newSVhek(HeKEY_hek(temphe))); |
192b9cd1 AB |
5346 | } |
5347 | } | |
5348 | } | |
5349 | ||
ad64d0ec | 5350 | return newRV_noinc(MUTABLE_SV(av)); |
192b9cd1 AB |
5351 | } |
5352 | ||
49d7dfbc | 5353 | void |
288b8c02 NC |
5354 | Perl_reg_numbered_buff_fetch(pTHX_ REGEXP * const r, const I32 paren, |
5355 | SV * const sv) | |
44a2ac75 | 5356 | { |
288b8c02 | 5357 | struct regexp *const rx = (struct regexp *)SvANY(r); |
44a2ac75 | 5358 | char *s = NULL; |
a9d504c3 | 5359 | I32 i = 0; |
44a2ac75 | 5360 | I32 s1, t1; |
7918f24d NC |
5361 | |
5362 | PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_FETCH; | |
44a2ac75 | 5363 | |
cde0cee5 YO |
5364 | if (!rx->subbeg) { |
5365 | sv_setsv(sv,&PL_sv_undef); | |
49d7dfbc | 5366 | return; |
cde0cee5 YO |
5367 | } |
5368 | else | |
f1b875a0 | 5369 | if (paren == RX_BUFF_IDX_PREMATCH && rx->offs[0].start != -1) { |
44a2ac75 | 5370 | /* $` */ |
f0ab9afb | 5371 | i = rx->offs[0].start; |
cde0cee5 | 5372 | s = rx->subbeg; |
44a2ac75 YO |
5373 | } |
5374 | else | |
f1b875a0 | 5375 | if (paren == RX_BUFF_IDX_POSTMATCH && rx->offs[0].end != -1) { |
44a2ac75 | 5376 | /* $' */ |
f0ab9afb NC |
5377 | s = rx->subbeg + rx->offs[0].end; |
5378 | i = rx->sublen - rx->offs[0].end; | |
44a2ac75 YO |
5379 | } |
5380 | else | |
5381 | if ( 0 <= paren && paren <= (I32)rx->nparens && | |
f0ab9afb NC |
5382 | (s1 = rx->offs[paren].start) != -1 && |
5383 | (t1 = rx->offs[paren].end) != -1) | |
44a2ac75 YO |
5384 | { |
5385 | /* $& $1 ... */ | |
5386 | i = t1 - s1; | |
5387 | s = rx->subbeg + s1; | |
cde0cee5 YO |
5388 | } else { |
5389 | sv_setsv(sv,&PL_sv_undef); | |
49d7dfbc | 5390 | return; |
cde0cee5 YO |
5391 | } |
5392 | assert(rx->sublen >= (s - rx->subbeg) + i ); | |
5393 | if (i >= 0) { | |
5394 | const int oldtainted = PL_tainted; | |
5395 | TAINT_NOT; | |
5396 | sv_setpvn(sv, s, i); | |
5397 | PL_tainted = oldtainted; | |
5398 | if ( (rx->extflags & RXf_CANY_SEEN) | |
07bc277f | 5399 | ? (RXp_MATCH_UTF8(rx) |
cde0cee5 | 5400 | && (!i || is_utf8_string((U8*)s, i))) |
07bc277f | 5401 | : (RXp_MATCH_UTF8(rx)) ) |
cde0cee5 YO |
5402 | { |
5403 | SvUTF8_on(sv); | |
5404 | } | |
5405 | else | |
5406 | SvUTF8_off(sv); | |
5407 | if (PL_tainting) { | |
07bc277f | 5408 | if (RXp_MATCH_TAINTED(rx)) { |
cde0cee5 YO |
5409 | if (SvTYPE(sv) >= SVt_PVMG) { |
5410 | MAGIC* const mg = SvMAGIC(sv); | |
5411 | MAGIC* mgt; | |
5412 | PL_tainted = 1; | |
5413 | SvMAGIC_set(sv, mg->mg_moremagic); | |
5414 | SvTAINT(sv); | |
5415 | if ((mgt = SvMAGIC(sv))) { | |
5416 | mg->mg_moremagic = mgt; | |
5417 | SvMAGIC_set(sv, mg); | |
44a2ac75 | 5418 | } |
cde0cee5 YO |
5419 | } else { |
5420 | PL_tainted = 1; | |
5421 | SvTAINT(sv); | |
5422 | } | |
5423 | } else | |
5424 | SvTAINTED_off(sv); | |
44a2ac75 | 5425 | } |
81714fb9 | 5426 | } else { |
44a2ac75 | 5427 | sv_setsv(sv,&PL_sv_undef); |
49d7dfbc | 5428 | return; |
81714fb9 YO |
5429 | } |
5430 | } | |
93b32b6d | 5431 | |
2fdbfb4d AB |
5432 | void |
5433 | Perl_reg_numbered_buff_store(pTHX_ REGEXP * const rx, const I32 paren, | |
5434 | SV const * const value) | |
5435 | { | |
7918f24d NC |
5436 | PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_STORE; |
5437 | ||
2fdbfb4d AB |
5438 | PERL_UNUSED_ARG(rx); |
5439 | PERL_UNUSED_ARG(paren); | |
5440 | PERL_UNUSED_ARG(value); | |
5441 | ||
5442 | if (!PL_localizing) | |
6ad8f254 | 5443 | Perl_croak_no_modify(aTHX); |
2fdbfb4d AB |
5444 | } |
5445 | ||
5446 | I32 | |
288b8c02 | 5447 | Perl_reg_numbered_buff_length(pTHX_ REGEXP * const r, const SV * const sv, |
2fdbfb4d AB |
5448 | const I32 paren) |
5449 | { | |
288b8c02 | 5450 | struct regexp *const rx = (struct regexp *)SvANY(r); |
2fdbfb4d AB |
5451 | I32 i; |
5452 | I32 s1, t1; | |
5453 | ||
7918f24d NC |
5454 | PERL_ARGS_ASSERT_REG_NUMBERED_BUFF_LENGTH; |
5455 | ||
2fdbfb4d AB |
5456 | /* Some of this code was originally in C<Perl_magic_len> in F<mg.c> */ |
5457 | switch (paren) { | |
192b9cd1 | 5458 | /* $` / ${^PREMATCH} */ |
f1b875a0 | 5459 | case RX_BUFF_IDX_PREMATCH: |
2fdbfb4d AB |
5460 | if (rx->offs[0].start != -1) { |
5461 | i = rx->offs[0].start; | |
5462 | if (i > 0) { | |
5463 | s1 = 0; | |
5464 | t1 = i; | |
5465 | goto getlen; | |
5466 | } | |
5467 | } | |
5468 | return 0; | |
192b9cd1 | 5469 | /* $' / ${^POSTMATCH} */ |
f1b875a0 | 5470 | case RX_BUFF_IDX_POSTMATCH: |
2fdbfb4d AB |
5471 | if (rx->offs[0].end != -1) { |
5472 | i = rx->sublen - rx->offs[0].end; | |
5473 | if (i > 0) { | |
5474 | s1 = rx->offs[0].end; | |
5475 | t1 = rx->sublen; | |
5476 | goto getlen; | |
5477 | } | |
5478 | } | |
5479 | return 0; | |
192b9cd1 AB |
5480 | /* $& / ${^MATCH}, $1, $2, ... */ |
5481 | default: | |
2fdbfb4d AB |
5482 | if (paren <= (I32)rx->nparens && |
5483 | (s1 = rx->offs[paren].start) != -1 && | |
5484 | (t1 = rx->offs[paren].end) != -1) | |
5485 | { | |
5486 | i = t1 - s1; | |
5487 | goto getlen; | |
5488 | } else { | |
5489 | if (ckWARN(WARN_UNINITIALIZED)) | |
ad64d0ec | 5490 | report_uninit((const SV *)sv); |
2fdbfb4d AB |
5491 | return 0; |
5492 | } | |
5493 | } | |
5494 | getlen: | |
07bc277f | 5495 | if (i > 0 && RXp_MATCH_UTF8(rx)) { |
2fdbfb4d AB |
5496 | const char * const s = rx->subbeg + s1; |
5497 | const U8 *ep; | |
5498 | STRLEN el; | |
5499 | ||
5500 | i = t1 - s1; | |
5501 | if (is_utf8_string_loclen((U8*)s, i, &ep, &el)) | |
5502 | i = el; | |
5503 | } | |
5504 | return i; | |
5505 | } | |
5506 | ||
fe578d7f | 5507 | SV* |
49d7dfbc | 5508 | Perl_reg_qr_package(pTHX_ REGEXP * const rx) |
fe578d7f | 5509 | { |
7918f24d | 5510 | PERL_ARGS_ASSERT_REG_QR_PACKAGE; |
fe578d7f | 5511 | PERL_UNUSED_ARG(rx); |
0fc92fc6 YO |
5512 | if (0) |
5513 | return NULL; | |
5514 | else | |
5515 | return newSVpvs("Regexp"); | |
fe578d7f | 5516 | } |
0a4db386 | 5517 | |
894be9b7 | 5518 | /* Scans the name of a named buffer from the pattern. |
0a4db386 YO |
5519 | * If flags is REG_RSN_RETURN_NULL returns null. |
5520 | * If flags is REG_RSN_RETURN_NAME returns an SV* containing the name | |
5521 | * If flags is REG_RSN_RETURN_DATA returns the data SV* corresponding | |
5522 | * to the parsed name as looked up in the RExC_paren_names hash. | |
5523 | * If there is an error throws a vFAIL().. type exception. | |
894be9b7 | 5524 | */ |
0a4db386 YO |
5525 | |
5526 | #define REG_RSN_RETURN_NULL 0 | |
5527 | #define REG_RSN_RETURN_NAME 1 | |
5528 | #define REG_RSN_RETURN_DATA 2 | |
5529 | ||
894be9b7 | 5530 | STATIC SV* |
7918f24d NC |
5531 | S_reg_scan_name(pTHX_ RExC_state_t *pRExC_state, U32 flags) |
5532 | { | |
894be9b7 | 5533 | char *name_start = RExC_parse; |
1f1031fe | 5534 | |
7918f24d NC |
5535 | PERL_ARGS_ASSERT_REG_SCAN_NAME; |
5536 | ||
1f1031fe YO |
5537 | if (isIDFIRST_lazy_if(RExC_parse, UTF)) { |
5538 | /* skip IDFIRST by using do...while */ | |
5539 | if (UTF) | |
5540 | do { | |
5541 | RExC_parse += UTF8SKIP(RExC_parse); | |
5542 | } while (isALNUM_utf8((U8*)RExC_parse)); | |
5543 | else | |
5544 | do { | |
5545 | RExC_parse++; | |
5546 | } while (isALNUM(*RExC_parse)); | |
894be9b7 | 5547 | } |
1f1031fe | 5548 | |
0a4db386 | 5549 | if ( flags ) { |
59cd0e26 NC |
5550 | SV* sv_name |
5551 | = newSVpvn_flags(name_start, (int)(RExC_parse - name_start), | |
5552 | SVs_TEMP | (UTF ? SVf_UTF8 : 0)); | |
0a4db386 YO |
5553 | if ( flags == REG_RSN_RETURN_NAME) |
5554 | return sv_name; | |
5555 | else if (flags==REG_RSN_RETURN_DATA) { | |
5556 | HE *he_str = NULL; | |
5557 | SV *sv_dat = NULL; | |
5558 | if ( ! sv_name ) /* should not happen*/ | |
5559 | Perl_croak(aTHX_ "panic: no svname in reg_scan_name"); | |
5560 | if (RExC_paren_names) | |
5561 | he_str = hv_fetch_ent( RExC_paren_names, sv_name, 0, 0 ); | |
5562 | if ( he_str ) | |
5563 | sv_dat = HeVAL(he_str); | |
5564 | if ( ! sv_dat ) | |
5565 | vFAIL("Reference to nonexistent named group"); | |
5566 | return sv_dat; | |
5567 | } | |
5568 | else { | |
5569 | Perl_croak(aTHX_ "panic: bad flag in reg_scan_name"); | |
5570 | } | |
5571 | /* NOT REACHED */ | |
894be9b7 | 5572 | } |
0a4db386 | 5573 | return NULL; |
894be9b7 YO |
5574 | } |
5575 | ||
3dab1dad YO |
5576 | #define DEBUG_PARSE_MSG(funcname) DEBUG_PARSE_r({ \ |
5577 | int rem=(int)(RExC_end - RExC_parse); \ | |
5578 | int cut; \ | |
5579 | int num; \ | |
5580 | int iscut=0; \ | |
5581 | if (rem>10) { \ | |
5582 | rem=10; \ | |
5583 | iscut=1; \ | |
5584 | } \ | |
5585 | cut=10-rem; \ | |
5586 | if (RExC_lastparse!=RExC_parse) \ | |
5587 | PerlIO_printf(Perl_debug_log," >%.*s%-*s", \ | |
5588 | rem, RExC_parse, \ | |
5589 | cut + 4, \ | |
5590 | iscut ? "..." : "<" \ | |
5591 | ); \ | |
5592 | else \ | |
5593 | PerlIO_printf(Perl_debug_log,"%16s",""); \ | |
5594 | \ | |
5595 | if (SIZE_ONLY) \ | |
3b57cd43 | 5596 | num = RExC_size + 1; \ |
3dab1dad YO |
5597 | else \ |
5598 | num=REG_NODE_NUM(RExC_emit); \ | |
5599 | if (RExC_lastnum!=num) \ | |
0a4db386 | 5600 | PerlIO_printf(Perl_debug_log,"|%4d",num); \ |
3dab1dad | 5601 | else \ |
0a4db386 | 5602 | PerlIO_printf(Perl_debug_log,"|%4s",""); \ |
be8e71aa YO |
5603 | PerlIO_printf(Perl_debug_log,"|%*s%-4s", \ |
5604 | (int)((depth*2)), "", \ | |
3dab1dad YO |
5605 | (funcname) \ |
5606 | ); \ | |
5607 | RExC_lastnum=num; \ | |
5608 | RExC_lastparse=RExC_parse; \ | |
5609 | }) | |
5610 | ||
07be1b83 YO |
5611 | |
5612 | ||
3dab1dad YO |
5613 | #define DEBUG_PARSE(funcname) DEBUG_PARSE_r({ \ |
5614 | DEBUG_PARSE_MSG((funcname)); \ | |
5615 | PerlIO_printf(Perl_debug_log,"%4s","\n"); \ | |
5616 | }) | |
6bda09f9 YO |
5617 | #define DEBUG_PARSE_FMT(funcname,fmt,args) DEBUG_PARSE_r({ \ |
5618 | DEBUG_PARSE_MSG((funcname)); \ | |
5619 | PerlIO_printf(Perl_debug_log,fmt "\n",args); \ | |
5620 | }) | |
a687059c LW |
5621 | /* |
5622 | - reg - regular expression, i.e. main body or parenthesized thing | |
5623 | * | |
5624 | * Caller must absorb opening parenthesis. | |
5625 | * | |
5626 | * Combining parenthesis handling with the base level of regular expression | |
5627 | * is a trifle forced, but the need to tie the tails of the branches to what | |
5628 | * follows makes it hard to avoid. | |
5629 | */ | |
07be1b83 YO |
5630 | #define REGTAIL(x,y,z) regtail((x),(y),(z),depth+1) |
5631 | #ifdef DEBUGGING | |
5632 | #define REGTAIL_STUDY(x,y,z) regtail_study((x),(y),(z),depth+1) | |
5633 | #else | |
5634 | #define REGTAIL_STUDY(x,y,z) regtail((x),(y),(z),depth+1) | |
5635 | #endif | |
3dab1dad | 5636 | |
76e3520e | 5637 | STATIC regnode * |
3dab1dad | 5638 | S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp,U32 depth) |
c277df42 | 5639 | /* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */ |
a687059c | 5640 | { |
27da23d5 | 5641 | dVAR; |
c277df42 IZ |
5642 | register regnode *ret; /* Will be the head of the group. */ |
5643 | register regnode *br; | |
5644 | register regnode *lastbr; | |
cbbf8932 | 5645 | register regnode *ender = NULL; |
a0d0e21e | 5646 | register I32 parno = 0; |
cbbf8932 | 5647 | I32 flags; |
f7819f85 | 5648 | U32 oregflags = RExC_flags; |
6136c704 AL |
5649 | bool have_branch = 0; |
5650 | bool is_open = 0; | |
594d7033 YO |
5651 | I32 freeze_paren = 0; |
5652 | I32 after_freeze = 0; | |
9d1d55b5 JP |
5653 | |
5654 | /* for (?g), (?gc), and (?o) warnings; warning | |
5655 | about (?c) will warn about (?g) -- japhy */ | |
5656 | ||
6136c704 AL |
5657 | #define WASTED_O 0x01 |
5658 | #define WASTED_G 0x02 | |
5659 | #define WASTED_C 0x04 | |
5660 | #define WASTED_GC (0x02|0x04) | |
cbbf8932 | 5661 | I32 wastedflags = 0x00; |
9d1d55b5 | 5662 | |
fac92740 | 5663 | char * parse_start = RExC_parse; /* MJD */ |
a28509cc | 5664 | char * const oregcomp_parse = RExC_parse; |
a0d0e21e | 5665 | |
3dab1dad | 5666 | GET_RE_DEBUG_FLAGS_DECL; |
7918f24d NC |
5667 | |
5668 | PERL_ARGS_ASSERT_REG; | |
3dab1dad YO |
5669 | DEBUG_PARSE("reg "); |
5670 | ||
821b33a5 | 5671 | *flagp = 0; /* Tentatively. */ |
a0d0e21e | 5672 | |
9d1d55b5 | 5673 | |
a0d0e21e LW |
5674 | /* Make an OPEN node, if parenthesized. */ |
5675 | if (paren) { | |
e2e6a0f1 YO |
5676 | if ( *RExC_parse == '*') { /* (*VERB:ARG) */ |
5677 | char *start_verb = RExC_parse; | |
5678 | STRLEN verb_len = 0; | |
5679 | char *start_arg = NULL; | |
5680 | unsigned char op = 0; | |
5681 | int argok = 1; | |
5682 | int internal_argval = 0; /* internal_argval is only useful if !argok */ | |
5683 | while ( *RExC_parse && *RExC_parse != ')' ) { | |
5684 | if ( *RExC_parse == ':' ) { | |
5685 | start_arg = RExC_parse + 1; | |
5686 | break; | |
5687 | } | |
5688 | RExC_parse++; | |
5689 | } | |
5690 | ++start_verb; | |
5691 | verb_len = RExC_parse - start_verb; | |
5692 | if ( start_arg ) { | |
5693 | RExC_parse++; | |
5694 | while ( *RExC_parse && *RExC_parse != ')' ) | |
5695 | RExC_parse++; | |
5696 | if ( *RExC_parse != ')' ) | |
5697 | vFAIL("Unterminated verb pattern argument"); | |
5698 | if ( RExC_parse == start_arg ) | |
5699 | start_arg = NULL; | |
5700 | } else { | |
5701 | if ( *RExC_parse != ')' ) | |
5702 | vFAIL("Unterminated verb pattern"); | |
5703 | } | |
5d458dd8 | 5704 | |
e2e6a0f1 YO |
5705 | switch ( *start_verb ) { |
5706 | case 'A': /* (*ACCEPT) */ | |
568a785a | 5707 | if ( memEQs(start_verb,verb_len,"ACCEPT") ) { |
e2e6a0f1 YO |
5708 | op = ACCEPT; |
5709 | internal_argval = RExC_nestroot; | |
5710 | } | |
5711 | break; | |
5712 | case 'C': /* (*COMMIT) */ | |
568a785a | 5713 | if ( memEQs(start_verb,verb_len,"COMMIT") ) |
e2e6a0f1 | 5714 | op = COMMIT; |
e2e6a0f1 YO |
5715 | break; |
5716 | case 'F': /* (*FAIL) */ | |
568a785a | 5717 | if ( verb_len==1 || memEQs(start_verb,verb_len,"FAIL") ) { |
e2e6a0f1 YO |
5718 | op = OPFAIL; |
5719 | argok = 0; | |
5720 | } | |
5721 | break; | |
5d458dd8 YO |
5722 | case ':': /* (*:NAME) */ |
5723 | case 'M': /* (*MARK:NAME) */ | |
568a785a | 5724 | if ( verb_len==0 || memEQs(start_verb,verb_len,"MARK") ) { |
e2e6a0f1 | 5725 | op = MARKPOINT; |
5d458dd8 YO |
5726 | argok = -1; |
5727 | } | |
5728 | break; | |
5729 | case 'P': /* (*PRUNE) */ | |
568a785a | 5730 | if ( memEQs(start_verb,verb_len,"PRUNE") ) |
5d458dd8 | 5731 | op = PRUNE; |
e2e6a0f1 | 5732 | break; |
5d458dd8 | 5733 | case 'S': /* (*SKIP) */ |
568a785a | 5734 | if ( memEQs(start_verb,verb_len,"SKIP") ) |
5d458dd8 YO |
5735 | op = SKIP; |
5736 | break; | |
5737 | case 'T': /* (*THEN) */ | |
5738 | /* [19:06] <TimToady> :: is then */ | |
568a785a | 5739 | if ( memEQs(start_verb,verb_len,"THEN") ) { |
5d458dd8 YO |
5740 | op = CUTGROUP; |
5741 | RExC_seen |= REG_SEEN_CUTGROUP; | |
5742 | } | |
e2e6a0f1 YO |
5743 | break; |
5744 | } | |
5745 | if ( ! op ) { | |
5746 | RExC_parse++; | |
5747 | vFAIL3("Unknown verb pattern '%.*s'", | |
5748 | verb_len, start_verb); | |
5749 | } | |
5750 | if ( argok ) { | |
5751 | if ( start_arg && internal_argval ) { | |
5752 | vFAIL3("Verb pattern '%.*s' may not have an argument", | |
5753 | verb_len, start_verb); | |
5754 | } else if ( argok < 0 && !start_arg ) { | |
5755 | vFAIL3("Verb pattern '%.*s' has a mandatory argument", | |
5756 | verb_len, start_verb); | |
5757 | } else { | |
5758 | ret = reganode(pRExC_state, op, internal_argval); | |
5759 | if ( ! internal_argval && ! SIZE_ONLY ) { | |
5760 | if (start_arg) { | |
5761 | SV *sv = newSVpvn( start_arg, RExC_parse - start_arg); | |
5762 | ARG(ret) = add_data( pRExC_state, 1, "S" ); | |
f8fc2ecf | 5763 | RExC_rxi->data->data[ARG(ret)]=(void*)sv; |
e2e6a0f1 YO |
5764 | ret->flags = 0; |
5765 | } else { | |
5766 | ret->flags = 1; | |
5767 | } | |
5768 | } | |
5769 | } | |
5770 | if (!internal_argval) | |
5771 | RExC_seen |= REG_SEEN_VERBARG; | |
5772 | } else if ( start_arg ) { | |
5773 | vFAIL3("Verb pattern '%.*s' may not have an argument", | |
5774 | verb_len, start_verb); | |
5775 | } else { | |
5776 | ret = reg_node(pRExC_state, op); | |
5777 | } | |
5778 | nextchar(pRExC_state); | |
5779 | return ret; | |
5780 | } else | |
fac92740 | 5781 | if (*RExC_parse == '?') { /* (?...) */ |
6136c704 | 5782 | bool is_logical = 0; |
a28509cc | 5783 | const char * const seqstart = RExC_parse; |
fb85c044 | 5784 | bool has_use_defaults = FALSE; |
ca9dfc88 | 5785 | |
830247a4 IZ |
5786 | RExC_parse++; |
5787 | paren = *RExC_parse++; | |
c277df42 | 5788 | ret = NULL; /* For look-ahead/behind. */ |
a0d0e21e | 5789 | switch (paren) { |
894be9b7 | 5790 | |
1f1031fe YO |
5791 | case 'P': /* (?P...) variants for those used to PCRE/Python */ |
5792 | paren = *RExC_parse++; | |
5793 | if ( paren == '<') /* (?P<...>) named capture */ | |
5794 | goto named_capture; | |
5795 | else if (paren == '>') { /* (?P>name) named recursion */ | |
5796 | goto named_recursion; | |
5797 | } | |
5798 | else if (paren == '=') { /* (?P=...) named backref */ | |
5799 | /* this pretty much dupes the code for \k<NAME> in regatom(), if | |
5800 | you change this make sure you change that */ | |
5801 | char* name_start = RExC_parse; | |
5802 | U32 num = 0; | |
5803 | SV *sv_dat = reg_scan_name(pRExC_state, | |
5804 | SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA); | |
5805 | if (RExC_parse == name_start || *RExC_parse != ')') | |
5806 | vFAIL2("Sequence %.3s... not terminated",parse_start); | |
5807 | ||
5808 | if (!SIZE_ONLY) { | |
5809 | num = add_data( pRExC_state, 1, "S" ); | |
5810 | RExC_rxi->data->data[num]=(void*)sv_dat; | |
5a5094bd | 5811 | SvREFCNT_inc_simple_void(sv_dat); |
1f1031fe YO |
5812 | } |
5813 | RExC_sawback = 1; | |
5814 | ret = reganode(pRExC_state, | |
5815 | (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF), | |
5816 | num); | |
5817 | *flagp |= HASWIDTH; | |
5818 | ||
5819 | Set_Node_Offset(ret, parse_start+1); | |
5820 | Set_Node_Cur_Length(ret); /* MJD */ | |
5821 | ||
5822 | nextchar(pRExC_state); | |
5823 | return ret; | |
5824 | } | |
57b84237 YO |
5825 | RExC_parse++; |
5826 | vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart); | |
5827 | /*NOTREACHED*/ | |
5828 | case '<': /* (?<...) */ | |
b81d288d | 5829 | if (*RExC_parse == '!') |
c277df42 | 5830 | paren = ','; |
0a4db386 | 5831 | else if (*RExC_parse != '=') |
1f1031fe | 5832 | named_capture: |
0a4db386 | 5833 | { /* (?<...>) */ |
81714fb9 | 5834 | char *name_start; |
894be9b7 | 5835 | SV *svname; |
81714fb9 YO |
5836 | paren= '>'; |
5837 | case '\'': /* (?'...') */ | |
5838 | name_start= RExC_parse; | |
0a4db386 YO |
5839 | svname = reg_scan_name(pRExC_state, |
5840 | SIZE_ONLY ? /* reverse test from the others */ | |
5841 | REG_RSN_RETURN_NAME : | |
5842 | REG_RSN_RETURN_NULL); | |
57b84237 YO |
5843 | if (RExC_parse == name_start) { |
5844 | RExC_parse++; | |
5845 | vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart); | |
5846 | /*NOTREACHED*/ | |
5847 | } | |
81714fb9 YO |
5848 | if (*RExC_parse != paren) |
5849 | vFAIL2("Sequence (?%c... not terminated", | |
5850 | paren=='>' ? '<' : paren); | |
5851 | if (SIZE_ONLY) { | |
e62cc96a YO |
5852 | HE *he_str; |
5853 | SV *sv_dat = NULL; | |
894be9b7 YO |
5854 | if (!svname) /* shouldnt happen */ |
5855 | Perl_croak(aTHX_ | |
5856 | "panic: reg_scan_name returned NULL"); | |
81714fb9 YO |
5857 | if (!RExC_paren_names) { |
5858 | RExC_paren_names= newHV(); | |
ad64d0ec | 5859 | sv_2mortal(MUTABLE_SV(RExC_paren_names)); |
1f1031fe YO |
5860 | #ifdef DEBUGGING |
5861 | RExC_paren_name_list= newAV(); | |
ad64d0ec | 5862 | sv_2mortal(MUTABLE_SV(RExC_paren_name_list)); |
1f1031fe | 5863 | #endif |
81714fb9 YO |
5864 | } |
5865 | he_str = hv_fetch_ent( RExC_paren_names, svname, 1, 0 ); | |
e62cc96a | 5866 | if ( he_str ) |
81714fb9 | 5867 | sv_dat = HeVAL(he_str); |
e62cc96a | 5868 | if ( ! sv_dat ) { |
81714fb9 | 5869 | /* croak baby croak */ |
e62cc96a YO |
5870 | Perl_croak(aTHX_ |
5871 | "panic: paren_name hash element allocation failed"); | |
5872 | } else if ( SvPOK(sv_dat) ) { | |
76a476f9 YO |
5873 | /* (?|...) can mean we have dupes so scan to check |
5874 | its already been stored. Maybe a flag indicating | |
5875 | we are inside such a construct would be useful, | |
5876 | but the arrays are likely to be quite small, so | |
5877 | for now we punt -- dmq */ | |
5878 | IV count = SvIV(sv_dat); | |
5879 | I32 *pv = (I32*)SvPVX(sv_dat); | |
5880 | IV i; | |
5881 | for ( i = 0 ; i < count ; i++ ) { | |
5882 | if ( pv[i] == RExC_npar ) { | |
5883 | count = 0; | |
5884 | break; | |
5885 | } | |
5886 | } | |
5887 | if ( count ) { | |
5888 | pv = (I32*)SvGROW(sv_dat, SvCUR(sv_dat) + sizeof(I32)+1); | |
5889 | SvCUR_set(sv_dat, SvCUR(sv_dat) + sizeof(I32)); | |
5890 | pv[count] = RExC_npar; | |
3a92e6ae | 5891 | SvIV_set(sv_dat, SvIVX(sv_dat) + 1); |
76a476f9 | 5892 | } |
81714fb9 YO |
5893 | } else { |
5894 | (void)SvUPGRADE(sv_dat,SVt_PVNV); | |
5895 | sv_setpvn(sv_dat, (char *)&(RExC_npar), sizeof(I32)); | |
5896 | SvIOK_on(sv_dat); | |
3ec35e0f | 5897 | SvIV_set(sv_dat, 1); |
e62cc96a | 5898 | } |
1f1031fe YO |
5899 | #ifdef DEBUGGING |
5900 | if (!av_store(RExC_paren_name_list, RExC_npar, SvREFCNT_inc(svname))) | |
5901 | SvREFCNT_dec(svname); | |
5902 | #endif | |
e62cc96a | 5903 | |
81714fb9 YO |
5904 | /*sv_dump(sv_dat);*/ |
5905 | } | |
5906 | nextchar(pRExC_state); | |
5907 | paren = 1; | |
5908 | goto capturing_parens; | |
5909 | } | |
5910 | RExC_seen |= REG_SEEN_LOOKBEHIND; | |
830247a4 | 5911 | RExC_parse++; |
fac92740 | 5912 | case '=': /* (?=...) */ |
89c6a13e | 5913 | RExC_seen_zerolen++; |
5c3fa2e7 | 5914 | break; |
fac92740 | 5915 | case '!': /* (?!...) */ |
830247a4 | 5916 | RExC_seen_zerolen++; |
e2e6a0f1 YO |
5917 | if (*RExC_parse == ')') { |
5918 | ret=reg_node(pRExC_state, OPFAIL); | |
5919 | nextchar(pRExC_state); | |
5920 | return ret; | |
5921 | } | |
594d7033 YO |
5922 | break; |
5923 | case '|': /* (?|...) */ | |
5924 | /* branch reset, behave like a (?:...) except that | |
5925 | buffers in alternations share the same numbers */ | |
5926 | paren = ':'; | |
5927 | after_freeze = freeze_paren = RExC_npar; | |
5928 | break; | |
fac92740 MJD |
5929 | case ':': /* (?:...) */ |
5930 | case '>': /* (?>...) */ | |
a0d0e21e | 5931 | break; |
fac92740 MJD |
5932 | case '$': /* (?$...) */ |
5933 | case '@': /* (?@...) */ | |
8615cb43 | 5934 | vFAIL2("Sequence (?%c...) not implemented", (int)paren); |
a0d0e21e | 5935 | break; |
fac92740 | 5936 | case '#': /* (?#...) */ |
830247a4 IZ |
5937 | while (*RExC_parse && *RExC_parse != ')') |
5938 | RExC_parse++; | |
5939 | if (*RExC_parse != ')') | |
c277df42 | 5940 | FAIL("Sequence (?#... not terminated"); |
830247a4 | 5941 | nextchar(pRExC_state); |
a0d0e21e LW |
5942 | *flagp = TRYAGAIN; |
5943 | return NULL; | |
894be9b7 YO |
5944 | case '0' : /* (?0) */ |
5945 | case 'R' : /* (?R) */ | |
5946 | if (*RExC_parse != ')') | |
6bda09f9 | 5947 | FAIL("Sequence (?R) not terminated"); |
1a147d38 | 5948 | ret = reg_node(pRExC_state, GOSTART); |
a3b492c3 | 5949 | *flagp |= POSTPONED; |
7f69552c YO |
5950 | nextchar(pRExC_state); |
5951 | return ret; | |
5952 | /*notreached*/ | |
894be9b7 YO |
5953 | { /* named and numeric backreferences */ |
5954 | I32 num; | |
894be9b7 YO |
5955 | case '&': /* (?&NAME) */ |
5956 | parse_start = RExC_parse - 1; | |
1f1031fe | 5957 | named_recursion: |
894be9b7 | 5958 | { |
0a4db386 YO |
5959 | SV *sv_dat = reg_scan_name(pRExC_state, |
5960 | SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA); | |
5961 | num = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0; | |
894be9b7 YO |
5962 | } |
5963 | goto gen_recurse_regop; | |
5964 | /* NOT REACHED */ | |
542fa716 YO |
5965 | case '+': |
5966 | if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) { | |
5967 | RExC_parse++; | |
5968 | vFAIL("Illegal pattern"); | |
5969 | } | |
5970 | goto parse_recursion; | |
5971 | /* NOT REACHED*/ | |
5972 | case '-': /* (?-1) */ | |
5973 | if (!(RExC_parse[0] >= '1' && RExC_parse[0] <= '9')) { | |
5974 | RExC_parse--; /* rewind to let it be handled later */ | |
5975 | goto parse_flags; | |
5976 | } | |
5977 | /*FALLTHROUGH */ | |
6bda09f9 YO |
5978 | case '1': case '2': case '3': case '4': /* (?1) */ |
5979 | case '5': case '6': case '7': case '8': case '9': | |
5980 | RExC_parse--; | |
542fa716 | 5981 | parse_recursion: |
894be9b7 YO |
5982 | num = atoi(RExC_parse); |
5983 | parse_start = RExC_parse - 1; /* MJD */ | |
542fa716 YO |
5984 | if (*RExC_parse == '-') |
5985 | RExC_parse++; | |
6bda09f9 YO |
5986 | while (isDIGIT(*RExC_parse)) |
5987 | RExC_parse++; | |
5988 | if (*RExC_parse!=')') | |
5989 | vFAIL("Expecting close bracket"); | |
894be9b7 YO |
5990 | |
5991 | gen_recurse_regop: | |
542fa716 YO |
5992 | if ( paren == '-' ) { |
5993 | /* | |
5994 | Diagram of capture buffer numbering. | |
5995 | Top line is the normal capture buffer numbers | |
3b753521 | 5996 | Bottom line is the negative indexing as from |
542fa716 YO |
5997 | the X (the (?-2)) |
5998 | ||
5999 | + 1 2 3 4 5 X 6 7 | |
6000 | /(a(x)y)(a(b(c(?-2)d)e)f)(g(h))/ | |
6001 | - 5 4 3 2 1 X x x | |
6002 | ||
6003 | */ | |
6004 | num = RExC_npar + num; | |
6005 | if (num < 1) { | |
6006 | RExC_parse++; | |
6007 | vFAIL("Reference to nonexistent group"); | |
6008 | } | |
6009 | } else if ( paren == '+' ) { | |
6010 | num = RExC_npar + num - 1; | |
6011 | } | |
6012 | ||
1a147d38 | 6013 | ret = reganode(pRExC_state, GOSUB, num); |
6bda09f9 YO |
6014 | if (!SIZE_ONLY) { |
6015 | if (num > (I32)RExC_rx->nparens) { | |
6016 | RExC_parse++; | |
6017 | vFAIL("Reference to nonexistent group"); | |
6018 | } | |
40d049e4 | 6019 | ARG2L_SET( ret, RExC_recurse_count++); |
6bda09f9 | 6020 | RExC_emit++; |
226de585 | 6021 | DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log, |
acff02b8 | 6022 | "Recurse #%"UVuf" to %"IVdf"\n", (UV)ARG(ret), (IV)ARG2L(ret))); |
894be9b7 | 6023 | } else { |
6bda09f9 | 6024 | RExC_size++; |
6bda09f9 | 6025 | } |
0a4db386 | 6026 | RExC_seen |= REG_SEEN_RECURSE; |
6bda09f9 | 6027 | Set_Node_Length(ret, 1 + regarglen[OP(ret)]); /* MJD */ |
58663417 RGS |
6028 | Set_Node_Offset(ret, parse_start); /* MJD */ |
6029 | ||
a3b492c3 | 6030 | *flagp |= POSTPONED; |
6bda09f9 YO |
6031 | nextchar(pRExC_state); |
6032 | return ret; | |
894be9b7 YO |
6033 | } /* named and numeric backreferences */ |
6034 | /* NOT REACHED */ | |
6035 | ||
fac92740 | 6036 | case '?': /* (??...) */ |
6136c704 | 6037 | is_logical = 1; |
57b84237 YO |
6038 | if (*RExC_parse != '{') { |
6039 | RExC_parse++; | |
6040 | vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart); | |
6041 | /*NOTREACHED*/ | |
6042 | } | |
a3b492c3 | 6043 | *flagp |= POSTPONED; |
830247a4 | 6044 | paren = *RExC_parse++; |
0f5d15d6 | 6045 | /* FALL THROUGH */ |
fac92740 | 6046 | case '{': /* (?{...}) */ |
c277df42 | 6047 | { |
2eccd3b2 NC |
6048 | I32 count = 1; |
6049 | U32 n = 0; | |
c277df42 | 6050 | char c; |
830247a4 | 6051 | char *s = RExC_parse; |
c277df42 | 6052 | |
830247a4 IZ |
6053 | RExC_seen_zerolen++; |
6054 | RExC_seen |= REG_SEEN_EVAL; | |
6055 | while (count && (c = *RExC_parse)) { | |
6136c704 AL |
6056 | if (c == '\\') { |
6057 | if (RExC_parse[1]) | |
6058 | RExC_parse++; | |
6059 | } | |
b81d288d | 6060 | else if (c == '{') |
c277df42 | 6061 | count++; |
b81d288d | 6062 | else if (c == '}') |
c277df42 | 6063 | count--; |
830247a4 | 6064 | RExC_parse++; |
c277df42 | 6065 | } |
6136c704 | 6066 | if (*RExC_parse != ')') { |
b81d288d | 6067 | RExC_parse = s; |
b45f050a JF |
6068 | vFAIL("Sequence (?{...}) not terminated or not {}-balanced"); |
6069 | } | |
c277df42 | 6070 | if (!SIZE_ONLY) { |
f3548bdc | 6071 | PAD *pad; |
6136c704 AL |
6072 | OP_4tree *sop, *rop; |
6073 | SV * const sv = newSVpvn(s, RExC_parse - 1 - s); | |
c277df42 | 6074 | |
569233ed SB |
6075 | ENTER; |
6076 | Perl_save_re_context(aTHX); | |
f3548bdc | 6077 | rop = sv_compile_2op(sv, &sop, "re", &pad); |
9b978d73 DM |
6078 | sop->op_private |= OPpREFCOUNTED; |
6079 | /* re_dup will OpREFCNT_inc */ | |
6080 | OpREFCNT_set(sop, 1); | |
569233ed | 6081 | LEAVE; |
c277df42 | 6082 | |
830247a4 | 6083 | n = add_data(pRExC_state, 3, "nop"); |
f8fc2ecf YO |
6084 | RExC_rxi->data->data[n] = (void*)rop; |
6085 | RExC_rxi->data->data[n+1] = (void*)sop; | |
6086 | RExC_rxi->data->data[n+2] = (void*)pad; | |
c277df42 | 6087 | SvREFCNT_dec(sv); |
a0ed51b3 | 6088 | } |
e24b16f9 | 6089 | else { /* First pass */ |
830247a4 | 6090 | if (PL_reginterp_cnt < ++RExC_seen_evals |
923e4eb5 | 6091 | && IN_PERL_RUNTIME) |
2cd61cdb IZ |
6092 | /* No compiled RE interpolated, has runtime |
6093 | components ===> unsafe. */ | |
6094 | FAIL("Eval-group not allowed at runtime, use re 'eval'"); | |
5b61d3f7 | 6095 | if (PL_tainting && PL_tainted) |
cc6b7395 | 6096 | FAIL("Eval-group in insecure regular expression"); |
54df2634 | 6097 | #if PERL_VERSION > 8 |
923e4eb5 | 6098 | if (IN_PERL_COMPILETIME) |
b5c19bd7 | 6099 | PL_cv_has_eval = 1; |
54df2634 | 6100 | #endif |
c277df42 | 6101 | } |
b5c19bd7 | 6102 | |
830247a4 | 6103 | nextchar(pRExC_state); |
6136c704 | 6104 | if (is_logical) { |
830247a4 | 6105 | ret = reg_node(pRExC_state, LOGICAL); |
0f5d15d6 IZ |
6106 | if (!SIZE_ONLY) |
6107 | ret->flags = 2; | |
3dab1dad | 6108 | REGTAIL(pRExC_state, ret, reganode(pRExC_state, EVAL, n)); |
fac92740 | 6109 | /* deal with the length of this later - MJD */ |
0f5d15d6 IZ |
6110 | return ret; |
6111 | } | |
ccb2c380 MP |
6112 | ret = reganode(pRExC_state, EVAL, n); |
6113 | Set_Node_Length(ret, RExC_parse - parse_start + 1); | |
6114 | Set_Node_Offset(ret, parse_start); | |
6115 | return ret; | |
c277df42 | 6116 | } |
fac92740 | 6117 | case '(': /* (?(?{...})...) and (?(?=...)...) */ |
c277df42 | 6118 | { |
0a4db386 | 6119 | int is_define= 0; |
fac92740 | 6120 | if (RExC_parse[0] == '?') { /* (?(?...)) */ |
b81d288d AB |
6121 | if (RExC_parse[1] == '=' || RExC_parse[1] == '!' |
6122 | || RExC_parse[1] == '<' | |
830247a4 | 6123 | || RExC_parse[1] == '{') { /* Lookahead or eval. */ |
c277df42 IZ |
6124 | I32 flag; |
6125 | ||
830247a4 | 6126 | ret = reg_node(pRExC_state, LOGICAL); |
0f5d15d6 IZ |
6127 | if (!SIZE_ONLY) |
6128 | ret->flags = 1; | |
3dab1dad | 6129 | REGTAIL(pRExC_state, ret, reg(pRExC_state, 1, &flag,depth+1)); |
c277df42 | 6130 | goto insert_if; |
b81d288d | 6131 | } |
a0ed51b3 | 6132 | } |
0a4db386 YO |
6133 | else if ( RExC_parse[0] == '<' /* (?(<NAME>)...) */ |
6134 | || RExC_parse[0] == '\'' ) /* (?('NAME')...) */ | |
6135 | { | |
6136 | char ch = RExC_parse[0] == '<' ? '>' : '\''; | |
6137 | char *name_start= RExC_parse++; | |
2eccd3b2 | 6138 | U32 num = 0; |
0a4db386 YO |
6139 | SV *sv_dat=reg_scan_name(pRExC_state, |
6140 | SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA); | |
6141 | if (RExC_parse == name_start || *RExC_parse != ch) | |
6142 | vFAIL2("Sequence (?(%c... not terminated", | |
6143 | (ch == '>' ? '<' : ch)); | |
6144 | RExC_parse++; | |
6145 | if (!SIZE_ONLY) { | |
6146 | num = add_data( pRExC_state, 1, "S" ); | |
f8fc2ecf | 6147 | RExC_rxi->data->data[num]=(void*)sv_dat; |
5a5094bd | 6148 | SvREFCNT_inc_simple_void(sv_dat); |
0a4db386 YO |
6149 | } |
6150 | ret = reganode(pRExC_state,NGROUPP,num); | |
6151 | goto insert_if_check_paren; | |
6152 | } | |
6153 | else if (RExC_parse[0] == 'D' && | |
6154 | RExC_parse[1] == 'E' && | |
6155 | RExC_parse[2] == 'F' && | |
6156 | RExC_parse[3] == 'I' && | |
6157 | RExC_parse[4] == 'N' && | |
6158 | RExC_parse[5] == 'E') | |
6159 | { | |
6160 | ret = reganode(pRExC_state,DEFINEP,0); | |
6161 | RExC_parse +=6 ; | |
6162 | is_define = 1; | |
6163 | goto insert_if_check_paren; | |
6164 | } | |
6165 | else if (RExC_parse[0] == 'R') { | |
6166 | RExC_parse++; | |
6167 | parno = 0; | |
6168 | if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) { | |
6169 | parno = atoi(RExC_parse++); | |
6170 | while (isDIGIT(*RExC_parse)) | |
6171 | RExC_parse++; | |
6172 | } else if (RExC_parse[0] == '&') { | |
6173 | SV *sv_dat; | |
6174 | RExC_parse++; | |
6175 | sv_dat = reg_scan_name(pRExC_state, | |
6176 | SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA); | |
6177 | parno = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0; | |
6178 | } | |
1a147d38 | 6179 | ret = reganode(pRExC_state,INSUBP,parno); |
0a4db386 YO |
6180 | goto insert_if_check_paren; |
6181 | } | |
830247a4 | 6182 | else if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) { |
fac92740 | 6183 | /* (?(1)...) */ |
6136c704 | 6184 | char c; |
830247a4 | 6185 | parno = atoi(RExC_parse++); |
c277df42 | 6186 | |
830247a4 IZ |
6187 | while (isDIGIT(*RExC_parse)) |
6188 | RExC_parse++; | |
fac92740 | 6189 | ret = reganode(pRExC_state, GROUPP, parno); |
2af232bd | 6190 | |
0a4db386 | 6191 | insert_if_check_paren: |
830247a4 | 6192 | if ((c = *nextchar(pRExC_state)) != ')') |
b45f050a | 6193 | vFAIL("Switch condition not recognized"); |
c277df42 | 6194 | insert_if: |
3dab1dad YO |
6195 | REGTAIL(pRExC_state, ret, reganode(pRExC_state, IFTHEN, 0)); |
6196 | br = regbranch(pRExC_state, &flags, 1,depth+1); | |
c277df42 | 6197 | if (br == NULL) |
830247a4 | 6198 | br = reganode(pRExC_state, LONGJMP, 0); |
c277df42 | 6199 | else |
3dab1dad | 6200 | REGTAIL(pRExC_state, br, reganode(pRExC_state, LONGJMP, 0)); |
830247a4 | 6201 | c = *nextchar(pRExC_state); |
d1b80229 IZ |
6202 | if (flags&HASWIDTH) |
6203 | *flagp |= HASWIDTH; | |
c277df42 | 6204 | if (c == '|') { |
0a4db386 YO |
6205 | if (is_define) |
6206 | vFAIL("(?(DEFINE)....) does not allow branches"); | |
830247a4 | 6207 | lastbr = reganode(pRExC_state, IFTHEN, 0); /* Fake one for optimizer. */ |
3dab1dad YO |
6208 | regbranch(pRExC_state, &flags, 1,depth+1); |
6209 | REGTAIL(pRExC_state, ret, lastbr); | |
d1b80229 IZ |
6210 | if (flags&HASWIDTH) |
6211 | *flagp |= HASWIDTH; | |
830247a4 | 6212 | c = *nextchar(pRExC_state); |
a0ed51b3 LW |
6213 | } |
6214 | else | |
c277df42 IZ |
6215 | lastbr = NULL; |
6216 | if (c != ')') | |
8615cb43 | 6217 | vFAIL("Switch (?(condition)... contains too many branches"); |
830247a4 | 6218 | ender = reg_node(pRExC_state, TAIL); |
3dab1dad | 6219 | REGTAIL(pRExC_state, br, ender); |
c277df42 | 6220 | if (lastbr) { |
3dab1dad YO |
6221 | REGTAIL(pRExC_state, lastbr, ender); |
6222 | REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); | |
a0ed51b3 LW |
6223 | } |
6224 | else | |
3dab1dad | 6225 | REGTAIL(pRExC_state, ret, ender); |
3b57cd43 YO |
6226 | RExC_size++; /* XXX WHY do we need this?!! |
6227 | For large programs it seems to be required | |
6228 | but I can't figure out why. -- dmq*/ | |
c277df42 | 6229 | return ret; |
a0ed51b3 LW |
6230 | } |
6231 | else { | |
830247a4 | 6232 | vFAIL2("Unknown switch condition (?(%.2s", RExC_parse); |
c277df42 IZ |
6233 | } |
6234 | } | |
1b1626e4 | 6235 | case 0: |
830247a4 | 6236 | RExC_parse--; /* for vFAIL to print correctly */ |
8615cb43 | 6237 | vFAIL("Sequence (? incomplete"); |
1b1626e4 | 6238 | break; |
85508812 KW |
6239 | case DEFAULT_PAT_MOD: /* Use default flags with the exceptions |
6240 | that follow */ | |
fb85c044 KW |
6241 | has_use_defaults = TRUE; |
6242 | STD_PMMOD_FLAGS_CLEAR(&RExC_flags); | |
9de15fec | 6243 | RExC_flags &= ~(RXf_PMf_LOCALE|RXf_PMf_UNICODE); |
fb85c044 | 6244 | goto parse_flags; |
a0d0e21e | 6245 | default: |
cde0cee5 YO |
6246 | --RExC_parse; |
6247 | parse_flags: /* (?i) */ | |
6248 | { | |
6249 | U32 posflags = 0, negflags = 0; | |
6250 | U32 *flagsp = &posflags; | |
9de15fec | 6251 | bool has_charset_modifier = 0; |
cde0cee5 YO |
6252 | |
6253 | while (*RExC_parse) { | |
6254 | /* && strchr("iogcmsx", *RExC_parse) */ | |
9d1d55b5 JP |
6255 | /* (?g), (?gc) and (?o) are useless here |
6256 | and must be globally applied -- japhy */ | |
cde0cee5 YO |
6257 | switch (*RExC_parse) { |
6258 | CASE_STD_PMMOD_FLAGS_PARSE_SET(flagsp); | |
9de15fec KW |
6259 | case LOCALE_PAT_MOD: |
6260 | if (has_charset_modifier || flagsp == &negflags) { | |
6261 | goto fail_modifiers; | |
6262 | } | |
8cc86590 KW |
6263 | posflags |= RXf_PMf_LOCALE; |
6264 | negflags |= RXf_PMf_UNICODE; | |
9de15fec KW |
6265 | has_charset_modifier = 1; |
6266 | break; | |
6267 | case UNICODE_PAT_MOD: | |
6268 | if (has_charset_modifier || flagsp == &negflags) { | |
6269 | goto fail_modifiers; | |
6270 | } | |
8cc86590 KW |
6271 | posflags |= RXf_PMf_UNICODE; |
6272 | negflags |= RXf_PMf_LOCALE; | |
9de15fec KW |
6273 | has_charset_modifier = 1; |
6274 | break; | |
6275 | case DUAL_PAT_MOD: | |
6276 | if (has_use_defaults | |
6277 | || has_charset_modifier | |
6278 | || flagsp == &negflags) | |
6279 | { | |
6280 | goto fail_modifiers; | |
6281 | } | |
8cc86590 | 6282 | negflags |= (RXf_PMf_LOCALE|RXf_PMf_UNICODE); |
9de15fec KW |
6283 | has_charset_modifier = 1; |
6284 | break; | |
f7819f85 A |
6285 | case ONCE_PAT_MOD: /* 'o' */ |
6286 | case GLOBAL_PAT_MOD: /* 'g' */ | |
9d1d55b5 | 6287 | if (SIZE_ONLY && ckWARN(WARN_REGEXP)) { |
6136c704 | 6288 | const I32 wflagbit = *RExC_parse == 'o' ? WASTED_O : WASTED_G; |
9d1d55b5 JP |
6289 | if (! (wastedflags & wflagbit) ) { |
6290 | wastedflags |= wflagbit; | |
6291 | vWARN5( | |
6292 | RExC_parse + 1, | |
6293 | "Useless (%s%c) - %suse /%c modifier", | |
6294 | flagsp == &negflags ? "?-" : "?", | |
6295 | *RExC_parse, | |
6296 | flagsp == &negflags ? "don't " : "", | |
6297 | *RExC_parse | |
6298 | ); | |
6299 | } | |
6300 | } | |
cde0cee5 YO |
6301 | break; |
6302 | ||
f7819f85 | 6303 | case CONTINUE_PAT_MOD: /* 'c' */ |
9d1d55b5 | 6304 | if (SIZE_ONLY && ckWARN(WARN_REGEXP)) { |
6136c704 AL |
6305 | if (! (wastedflags & WASTED_C) ) { |
6306 | wastedflags |= WASTED_GC; | |
9d1d55b5 JP |
6307 | vWARN3( |
6308 | RExC_parse + 1, | |
6309 | "Useless (%sc) - %suse /gc modifier", | |
6310 | flagsp == &negflags ? "?-" : "?", | |
6311 | flagsp == &negflags ? "don't " : "" | |
6312 | ); | |
6313 | } | |
6314 | } | |
cde0cee5 | 6315 | break; |
f7819f85 | 6316 | case KEEPCOPY_PAT_MOD: /* 'p' */ |
cde0cee5 | 6317 | if (flagsp == &negflags) { |
668c081a NC |
6318 | if (SIZE_ONLY) |
6319 | ckWARNreg(RExC_parse + 1,"Useless use of (?-p)"); | |
cde0cee5 YO |
6320 | } else { |
6321 | *flagsp |= RXf_PMf_KEEPCOPY; | |
6322 | } | |
6323 | break; | |
6324 | case '-': | |
3b753521 | 6325 | /* A flag is a default iff it is following a minus, so |
fb85c044 KW |
6326 | * if there is a minus, it means will be trying to |
6327 | * re-specify a default which is an error */ | |
6328 | if (has_use_defaults || flagsp == &negflags) { | |
9de15fec | 6329 | fail_modifiers: |
57b84237 YO |
6330 | RExC_parse++; |
6331 | vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart); | |
6332 | /*NOTREACHED*/ | |
6333 | } | |
cde0cee5 YO |
6334 | flagsp = &negflags; |
6335 | wastedflags = 0; /* reset so (?g-c) warns twice */ | |
6336 | break; | |
6337 | case ':': | |
6338 | paren = ':'; | |
6339 | /*FALLTHROUGH*/ | |
6340 | case ')': | |
6341 | RExC_flags |= posflags; | |
6342 | RExC_flags &= ~negflags; | |
f7819f85 A |
6343 | if (paren != ':') { |
6344 | oregflags |= posflags; | |
6345 | oregflags &= ~negflags; | |
6346 | } | |
cde0cee5 YO |
6347 | nextchar(pRExC_state); |
6348 | if (paren != ':') { | |
6349 | *flagp = TRYAGAIN; | |
6350 | return NULL; | |
6351 | } else { | |
6352 | ret = NULL; | |
6353 | goto parse_rest; | |
6354 | } | |
6355 | /*NOTREACHED*/ | |
6356 | default: | |
cde0cee5 YO |
6357 | RExC_parse++; |
6358 | vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart); | |
6359 | /*NOTREACHED*/ | |
6360 | } | |
830247a4 | 6361 | ++RExC_parse; |
48c036b1 | 6362 | } |
cde0cee5 | 6363 | }} /* one for the default block, one for the switch */ |
a0d0e21e | 6364 | } |
fac92740 | 6365 | else { /* (...) */ |
81714fb9 | 6366 | capturing_parens: |
830247a4 IZ |
6367 | parno = RExC_npar; |
6368 | RExC_npar++; | |
e2e6a0f1 | 6369 | |
830247a4 | 6370 | ret = reganode(pRExC_state, OPEN, parno); |
e2e6a0f1 YO |
6371 | if (!SIZE_ONLY ){ |
6372 | if (!RExC_nestroot) | |
6373 | RExC_nestroot = parno; | |
c009da3d YO |
6374 | if (RExC_seen & REG_SEEN_RECURSE |
6375 | && !RExC_open_parens[parno-1]) | |
6376 | { | |
e2e6a0f1 | 6377 | DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log, |
40d049e4 YO |
6378 | "Setting open paren #%"IVdf" to %d\n", |
6379 | (IV)parno, REG_NODE_NUM(ret))); | |
e2e6a0f1 YO |
6380 | RExC_open_parens[parno-1]= ret; |
6381 | } | |
6bda09f9 | 6382 | } |
fac92740 MJD |
6383 | Set_Node_Length(ret, 1); /* MJD */ |
6384 | Set_Node_Offset(ret, RExC_parse); /* MJD */ | |
6136c704 | 6385 | is_open = 1; |
a0d0e21e | 6386 | } |
a0ed51b3 | 6387 | } |
fac92740 | 6388 | else /* ! paren */ |
a0d0e21e | 6389 | ret = NULL; |
cde0cee5 YO |
6390 | |
6391 | parse_rest: | |
a0d0e21e | 6392 | /* Pick up the branches, linking them together. */ |
fac92740 | 6393 | parse_start = RExC_parse; /* MJD */ |
3dab1dad | 6394 | br = regbranch(pRExC_state, &flags, 1,depth+1); |
ee91d26e VP |
6395 | |
6396 | if (freeze_paren) { | |
6397 | if (RExC_npar > after_freeze) | |
6398 | after_freeze = RExC_npar; | |
6399 | RExC_npar = freeze_paren; | |
6400 | } | |
6401 | ||
fac92740 | 6402 | /* branch_len = (paren != 0); */ |
2af232bd | 6403 | |
a0d0e21e LW |
6404 | if (br == NULL) |
6405 | return(NULL); | |
830247a4 IZ |
6406 | if (*RExC_parse == '|') { |
6407 | if (!SIZE_ONLY && RExC_extralen) { | |
6bda09f9 | 6408 | reginsert(pRExC_state, BRANCHJ, br, depth+1); |
a0ed51b3 | 6409 | } |
fac92740 | 6410 | else { /* MJD */ |
6bda09f9 | 6411 | reginsert(pRExC_state, BRANCH, br, depth+1); |
fac92740 MJD |
6412 | Set_Node_Length(br, paren != 0); |
6413 | Set_Node_Offset_To_R(br-RExC_emit_start, parse_start-RExC_start); | |
6414 | } | |
c277df42 IZ |
6415 | have_branch = 1; |
6416 | if (SIZE_ONLY) | |
830247a4 | 6417 | RExC_extralen += 1; /* For BRANCHJ-BRANCH. */ |
a0ed51b3 LW |
6418 | } |
6419 | else if (paren == ':') { | |
c277df42 IZ |
6420 | *flagp |= flags&SIMPLE; |
6421 | } | |
6136c704 | 6422 | if (is_open) { /* Starts with OPEN. */ |
3dab1dad | 6423 | REGTAIL(pRExC_state, ret, br); /* OPEN -> first. */ |
a0ed51b3 LW |
6424 | } |
6425 | else if (paren != '?') /* Not Conditional */ | |
a0d0e21e | 6426 | ret = br; |
8ae10a67 | 6427 | *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED); |
c277df42 | 6428 | lastbr = br; |
830247a4 IZ |
6429 | while (*RExC_parse == '|') { |
6430 | if (!SIZE_ONLY && RExC_extralen) { | |
6431 | ender = reganode(pRExC_state, LONGJMP,0); | |
3dab1dad | 6432 | REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); /* Append to the previous. */ |
c277df42 IZ |
6433 | } |
6434 | if (SIZE_ONLY) | |
830247a4 IZ |
6435 | RExC_extralen += 2; /* Account for LONGJMP. */ |
6436 | nextchar(pRExC_state); | |
594d7033 YO |
6437 | if (freeze_paren) { |
6438 | if (RExC_npar > after_freeze) | |
6439 | after_freeze = RExC_npar; | |
6440 | RExC_npar = freeze_paren; | |
6441 | } | |
3dab1dad | 6442 | br = regbranch(pRExC_state, &flags, 0, depth+1); |
2af232bd | 6443 | |
a687059c | 6444 | if (br == NULL) |
a0d0e21e | 6445 | return(NULL); |
3dab1dad | 6446 | REGTAIL(pRExC_state, lastbr, br); /* BRANCH -> BRANCH. */ |
c277df42 | 6447 | lastbr = br; |
8ae10a67 | 6448 | *flagp |= flags & (SPSTART | HASWIDTH | POSTPONED); |
a0d0e21e LW |
6449 | } |
6450 | ||
c277df42 IZ |
6451 | if (have_branch || paren != ':') { |
6452 | /* Make a closing node, and hook it on the end. */ | |
6453 | switch (paren) { | |
6454 | case ':': | |
830247a4 | 6455 | ender = reg_node(pRExC_state, TAIL); |
c277df42 IZ |
6456 | break; |
6457 | case 1: | |
830247a4 | 6458 | ender = reganode(pRExC_state, CLOSE, parno); |
40d049e4 YO |
6459 | if (!SIZE_ONLY && RExC_seen & REG_SEEN_RECURSE) { |
6460 | DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log, | |
6461 | "Setting close paren #%"IVdf" to %d\n", | |
6462 | (IV)parno, REG_NODE_NUM(ender))); | |
6463 | RExC_close_parens[parno-1]= ender; | |
e2e6a0f1 YO |
6464 | if (RExC_nestroot == parno) |
6465 | RExC_nestroot = 0; | |
40d049e4 | 6466 | } |
fac92740 MJD |
6467 | Set_Node_Offset(ender,RExC_parse+1); /* MJD */ |
6468 | Set_Node_Length(ender,1); /* MJD */ | |
c277df42 IZ |
6469 | break; |
6470 | case '<': | |
c277df42 IZ |
6471 | case ',': |
6472 | case '=': | |
6473 | case '!': | |
c277df42 | 6474 | *flagp &= ~HASWIDTH; |
821b33a5 IZ |
6475 | /* FALL THROUGH */ |
6476 | case '>': | |
830247a4 | 6477 | ender = reg_node(pRExC_state, SUCCEED); |
c277df42 IZ |
6478 | break; |
6479 | case 0: | |
830247a4 | 6480 | ender = reg_node(pRExC_state, END); |
40d049e4 YO |
6481 | if (!SIZE_ONLY) { |
6482 | assert(!RExC_opend); /* there can only be one! */ | |
6483 | RExC_opend = ender; | |
6484 | } | |
c277df42 IZ |
6485 | break; |
6486 | } | |
eaf3ca90 | 6487 | REGTAIL(pRExC_state, lastbr, ender); |
a0d0e21e | 6488 | |
9674d46a | 6489 | if (have_branch && !SIZE_ONLY) { |
eaf3ca90 YO |
6490 | if (depth==1) |
6491 | RExC_seen |= REG_TOP_LEVEL_BRANCHES; | |
6492 | ||
c277df42 | 6493 | /* Hook the tails of the branches to the closing node. */ |
9674d46a AL |
6494 | for (br = ret; br; br = regnext(br)) { |
6495 | const U8 op = PL_regkind[OP(br)]; | |
6496 | if (op == BRANCH) { | |
07be1b83 | 6497 | REGTAIL_STUDY(pRExC_state, NEXTOPER(br), ender); |
9674d46a AL |
6498 | } |
6499 | else if (op == BRANCHJ) { | |
07be1b83 | 6500 | REGTAIL_STUDY(pRExC_state, NEXTOPER(NEXTOPER(br)), ender); |
9674d46a | 6501 | } |
c277df42 IZ |
6502 | } |
6503 | } | |
a0d0e21e | 6504 | } |
c277df42 IZ |
6505 | |
6506 | { | |
e1ec3a88 AL |
6507 | const char *p; |
6508 | static const char parens[] = "=!<,>"; | |
c277df42 IZ |
6509 | |
6510 | if (paren && (p = strchr(parens, paren))) { | |
eb160463 | 6511 | U8 node = ((p - parens) % 2) ? UNLESSM : IFMATCH; |
c277df42 IZ |
6512 | int flag = (p - parens) > 1; |
6513 | ||
6514 | if (paren == '>') | |
6515 | node = SUSPEND, flag = 0; | |
6bda09f9 | 6516 | reginsert(pRExC_state, node,ret, depth+1); |
45948336 EP |
6517 | Set_Node_Cur_Length(ret); |
6518 | Set_Node_Offset(ret, parse_start + 1); | |
c277df42 | 6519 | ret->flags = flag; |
07be1b83 | 6520 | REGTAIL_STUDY(pRExC_state, ret, reg_node(pRExC_state, TAIL)); |
c277df42 | 6521 | } |
a0d0e21e LW |
6522 | } |
6523 | ||
6524 | /* Check for proper termination. */ | |
ce3e6498 | 6525 | if (paren) { |
e2509266 | 6526 | RExC_flags = oregflags; |
830247a4 IZ |
6527 | if (RExC_parse >= RExC_end || *nextchar(pRExC_state) != ')') { |
6528 | RExC_parse = oregcomp_parse; | |
380a0633 | 6529 | vFAIL("Unmatched ("); |
ce3e6498 | 6530 | } |
a0ed51b3 | 6531 | } |
830247a4 IZ |
6532 | else if (!paren && RExC_parse < RExC_end) { |
6533 | if (*RExC_parse == ')') { | |
6534 | RExC_parse++; | |
380a0633 | 6535 | vFAIL("Unmatched )"); |
a0ed51b3 LW |
6536 | } |
6537 | else | |
b45f050a | 6538 | FAIL("Junk on end of regexp"); /* "Can't happen". */ |
a0d0e21e LW |
6539 | /* NOTREACHED */ |
6540 | } | |
594d7033 YO |
6541 | if (after_freeze) |
6542 | RExC_npar = after_freeze; | |
a0d0e21e | 6543 | return(ret); |
a687059c LW |
6544 | } |
6545 | ||
6546 | /* | |
6547 | - regbranch - one alternative of an | operator | |
6548 | * | |
6549 | * Implements the concatenation operator. | |
6550 | */ | |
76e3520e | 6551 | STATIC regnode * |
3dab1dad | 6552 | S_regbranch(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, I32 first, U32 depth) |
a687059c | 6553 | { |
97aff369 | 6554 | dVAR; |
c277df42 IZ |
6555 | register regnode *ret; |
6556 | register regnode *chain = NULL; | |
6557 | register regnode *latest; | |
6558 | I32 flags = 0, c = 0; | |
3dab1dad | 6559 | GET_RE_DEBUG_FLAGS_DECL; |
7918f24d NC |
6560 | |
6561 | PERL_ARGS_ASSERT_REGBRANCH; | |
6562 | ||
3dab1dad | 6563 | DEBUG_PARSE("brnc"); |
02daf0ab | 6564 | |
b81d288d | 6565 | if (first) |
c277df42 IZ |
6566 | ret = NULL; |
6567 | else { | |
b81d288d | 6568 | if (!SIZE_ONLY && RExC_extralen) |
830247a4 | 6569 | ret = reganode(pRExC_state, BRANCHJ,0); |
fac92740 | 6570 | else { |
830247a4 | 6571 | ret = reg_node(pRExC_state, BRANCH); |
fac92740 MJD |
6572 | Set_Node_Length(ret, 1); |
6573 | } | |
c277df42 IZ |
6574 | } |
6575 | ||
b81d288d | 6576 | if (!first && SIZE_ONLY) |
830247a4 | 6577 | RExC_extralen += 1; /* BRANCHJ */ |
b81d288d | 6578 | |
c277df42 | 6579 | *flagp = WORST; /* Tentatively. */ |
a0d0e21e | 6580 | |
830247a4 IZ |
6581 | RExC_parse--; |
6582 | nextchar(pRExC_state); | |
6583 | while (RExC_parse < RExC_end && *RExC_parse != '|' && *RExC_parse != ')') { | |
a0d0e21e | 6584 | flags &= ~TRYAGAIN; |
3dab1dad | 6585 | latest = regpiece(pRExC_state, &flags,depth+1); |
a0d0e21e LW |
6586 | if (latest == NULL) { |
6587 | if (flags & TRYAGAIN) | |
6588 | continue; | |
6589 | return(NULL); | |
a0ed51b3 LW |
6590 | } |
6591 | else if (ret == NULL) | |
c277df42 | 6592 | ret = latest; |
8ae10a67 | 6593 | *flagp |= flags&(HASWIDTH|POSTPONED); |
c277df42 | 6594 | if (chain == NULL) /* First piece. */ |
a0d0e21e LW |
6595 | *flagp |= flags&SPSTART; |
6596 | else { | |
830247a4 | 6597 | RExC_naughty++; |
3dab1dad | 6598 | REGTAIL(pRExC_state, chain, latest); |
a687059c | 6599 | } |
a0d0e21e | 6600 | chain = latest; |
c277df42 IZ |
6601 | c++; |
6602 | } | |
6603 | if (chain == NULL) { /* Loop ran zero times. */ | |
830247a4 | 6604 | chain = reg_node(pRExC_state, NOTHING); |
c277df42 IZ |
6605 | if (ret == NULL) |
6606 | ret = chain; | |
6607 | } | |
6608 | if (c == 1) { | |
6609 | *flagp |= flags&SIMPLE; | |
a0d0e21e | 6610 | } |
a687059c | 6611 | |
d4c19fe8 | 6612 | return ret; |
a687059c LW |
6613 | } |
6614 | ||
6615 | /* | |
6616 | - regpiece - something followed by possible [*+?] | |
6617 | * | |
6618 | * Note that the branching code sequences used for ? and the general cases | |
6619 | * of * and + are somewhat optimized: they use the same NOTHING node as | |
6620 | * both the endmarker for their branch list and the body of the last branch. | |
6621 | * It might seem that this node could be dispensed with entirely, but the | |
6622 | * endmarker role is not redundant. | |
6623 | */ | |
76e3520e | 6624 | STATIC regnode * |
3dab1dad | 6625 | S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth) |
a687059c | 6626 | { |
97aff369 | 6627 | dVAR; |
c277df42 | 6628 | register regnode *ret; |
a0d0e21e LW |
6629 | register char op; |
6630 | register char *next; | |
6631 | I32 flags; | |
1df70142 | 6632 | const char * const origparse = RExC_parse; |
a0d0e21e | 6633 | I32 min; |
c277df42 | 6634 | I32 max = REG_INFTY; |
fac92740 | 6635 | char *parse_start; |
10edeb5d | 6636 | const char *maxpos = NULL; |
3dab1dad | 6637 | GET_RE_DEBUG_FLAGS_DECL; |
7918f24d NC |
6638 | |
6639 | PERL_ARGS_ASSERT_REGPIECE; | |
6640 | ||
3dab1dad | 6641 | DEBUG_PARSE("piec"); |
a0d0e21e | 6642 | |
3dab1dad | 6643 | ret = regatom(pRExC_state, &flags,depth+1); |
a0d0e21e LW |
6644 | if (ret == NULL) { |
6645 | if (flags & TRYAGAIN) | |
6646 | *flagp |= TRYAGAIN; | |
6647 | return(NULL); | |
6648 | } | |
6649 | ||
830247a4 | 6650 | op = *RExC_parse; |
a0d0e21e | 6651 | |
830247a4 | 6652 | if (op == '{' && regcurly(RExC_parse)) { |
10edeb5d | 6653 | maxpos = NULL; |
fac92740 | 6654 | parse_start = RExC_parse; /* MJD */ |
830247a4 | 6655 | next = RExC_parse + 1; |
a0d0e21e LW |
6656 | while (isDIGIT(*next) || *next == ',') { |
6657 | if (*next == ',') { | |
6658 | if (maxpos) | |
6659 | break; | |
6660 | else | |
6661 | maxpos = next; | |
a687059c | 6662 | } |
a0d0e21e LW |
6663 | next++; |
6664 | } | |
6665 | if (*next == '}') { /* got one */ | |
6666 | if (!maxpos) | |
6667 | maxpos = next; | |
830247a4 IZ |
6668 | RExC_parse++; |
6669 | min = atoi(RExC_parse); | |
a0d0e21e LW |
6670 | if (*maxpos == ',') |
6671 | maxpos++; | |
6672 | else | |
830247a4 | 6673 | maxpos = RExC_parse; |
a0d0e21e LW |
6674 | max = atoi(maxpos); |
6675 | if (!max && *maxpos != '0') | |
c277df42 IZ |
6676 | max = REG_INFTY; /* meaning "infinity" */ |
6677 | else if (max >= REG_INFTY) | |
8615cb43 | 6678 | vFAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1); |
830247a4 IZ |
6679 | RExC_parse = next; |
6680 | nextchar(pRExC_state); | |
a0d0e21e LW |
6681 | |
6682 | do_curly: | |
6683 | if ((flags&SIMPLE)) { | |
830247a4 | 6684 | RExC_naughty += 2 + RExC_naughty / 2; |
6bda09f9 | 6685 | reginsert(pRExC_state, CURLY, ret, depth+1); |
fac92740 MJD |
6686 | Set_Node_Offset(ret, parse_start+1); /* MJD */ |
6687 | Set_Node_Cur_Length(ret); | |
a0d0e21e LW |
6688 | } |
6689 | else { | |
3dab1dad | 6690 | regnode * const w = reg_node(pRExC_state, WHILEM); |
2c2d71f5 JH |
6691 | |
6692 | w->flags = 0; | |
3dab1dad | 6693 | REGTAIL(pRExC_state, ret, w); |
830247a4 | 6694 | if (!SIZE_ONLY && RExC_extralen) { |
6bda09f9 YO |
6695 | reginsert(pRExC_state, LONGJMP,ret, depth+1); |
6696 | reginsert(pRExC_state, NOTHING,ret, depth+1); | |
c277df42 IZ |
6697 | NEXT_OFF(ret) = 3; /* Go over LONGJMP. */ |
6698 | } | |
6bda09f9 | 6699 | reginsert(pRExC_state, CURLYX,ret, depth+1); |
fac92740 MJD |
6700 | /* MJD hk */ |
6701 | Set_Node_Offset(ret, parse_start+1); | |
2af232bd | 6702 | Set_Node_Length(ret, |
fac92740 | 6703 | op == '{' ? (RExC_parse - parse_start) : 1); |
2af232bd | 6704 | |
830247a4 | 6705 | if (!SIZE_ONLY && RExC_extralen) |
c277df42 | 6706 | NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */ |
3dab1dad | 6707 | REGTAIL(pRExC_state, ret, reg_node(pRExC_state, NOTHING)); |
c277df42 | 6708 | if (SIZE_ONLY) |
830247a4 IZ |
6709 | RExC_whilem_seen++, RExC_extralen += 3; |
6710 | RExC_naughty += 4 + RExC_naughty; /* compound interest */ | |
a0d0e21e | 6711 | } |
c277df42 | 6712 | ret->flags = 0; |
a0d0e21e LW |
6713 | |
6714 | if (min > 0) | |
821b33a5 IZ |
6715 | *flagp = WORST; |
6716 | if (max > 0) | |
6717 | *flagp |= HASWIDTH; | |
8fa23287 | 6718 | if (max < min) |
8615cb43 | 6719 | vFAIL("Can't do {n,m} with n > m"); |
c277df42 | 6720 | if (!SIZE_ONLY) { |
eb160463 GS |
6721 | ARG1_SET(ret, (U16)min); |
6722 | ARG2_SET(ret, (U16)max); | |
a687059c | 6723 | } |
a687059c | 6724 | |
a0d0e21e | 6725 | goto nest_check; |
a687059c | 6726 | } |
a0d0e21e | 6727 | } |
a687059c | 6728 | |
a0d0e21e LW |
6729 | if (!ISMULT1(op)) { |
6730 | *flagp = flags; | |
a687059c | 6731 | return(ret); |
a0d0e21e | 6732 | } |
bb20fd44 | 6733 | |
c277df42 | 6734 | #if 0 /* Now runtime fix should be reliable. */ |
b45f050a JF |
6735 | |
6736 | /* if this is reinstated, don't forget to put this back into perldiag: | |
6737 | ||
6738 | =item Regexp *+ operand could be empty at {#} in regex m/%s/ | |
6739 | ||
6740 | (F) The part of the regexp subject to either the * or + quantifier | |
6741 | could match an empty string. The {#} shows in the regular | |
6742 | expression about where the problem was discovered. | |
6743 | ||
6744 | */ | |
6745 | ||
bb20fd44 | 6746 | if (!(flags&HASWIDTH) && op != '?') |
b45f050a | 6747 | vFAIL("Regexp *+ operand could be empty"); |
b81d288d | 6748 | #endif |
bb20fd44 | 6749 | |
fac92740 | 6750 | parse_start = RExC_parse; |
830247a4 | 6751 | nextchar(pRExC_state); |
a0d0e21e | 6752 | |
821b33a5 | 6753 | *flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH); |
a0d0e21e LW |
6754 | |
6755 | if (op == '*' && (flags&SIMPLE)) { | |
6bda09f9 | 6756 | reginsert(pRExC_state, STAR, ret, depth+1); |
c277df42 | 6757 | ret->flags = 0; |
830247a4 | 6758 | RExC_naughty += 4; |
a0d0e21e LW |
6759 | } |
6760 | else if (op == '*') { | |
6761 | min = 0; | |
6762 | goto do_curly; | |
a0ed51b3 LW |
6763 | } |
6764 | else if (op == '+' && (flags&SIMPLE)) { | |
6bda09f9 | 6765 | reginsert(pRExC_state, PLUS, ret, depth+1); |
c277df42 | 6766 | ret->flags = 0; |
830247a4 | 6767 | RExC_naughty += 3; |
a0d0e21e LW |
6768 | } |
6769 | else if (op == '+') { | |
6770 | min = 1; | |
6771 | goto do_curly; | |
a0ed51b3 LW |
6772 | } |
6773 | else if (op == '?') { | |
a0d0e21e LW |
6774 | min = 0; max = 1; |
6775 | goto do_curly; | |
6776 | } | |
6777 | nest_check: | |
668c081a NC |
6778 | if (!SIZE_ONLY && !(flags&(HASWIDTH|POSTPONED)) && max > REG_INFTY/3) { |
6779 | ckWARN3reg(RExC_parse, | |
6780 | "%.*s matches null string many times", | |
6781 | (int)(RExC_parse >= origparse ? RExC_parse - origparse : 0), | |
6782 | origparse); | |
a0d0e21e LW |
6783 | } |
6784 | ||
b9b4dddf | 6785 | if (RExC_parse < RExC_end && *RExC_parse == '?') { |
830247a4 | 6786 | nextchar(pRExC_state); |
6bda09f9 | 6787 | reginsert(pRExC_state, MINMOD, ret, depth+1); |
3dab1dad | 6788 | REGTAIL(pRExC_state, ret, ret + NODE_STEP_REGNODE); |
a0d0e21e | 6789 | } |
b9b4dddf YO |
6790 | #ifndef REG_ALLOW_MINMOD_SUSPEND |
6791 | else | |
6792 | #endif | |
6793 | if (RExC_parse < RExC_end && *RExC_parse == '+') { | |
6794 | regnode *ender; | |
6795 | nextchar(pRExC_state); | |
6796 | ender = reg_node(pRExC_state, SUCCEED); | |
6797 | REGTAIL(pRExC_state, ret, ender); | |
6798 | reginsert(pRExC_state, SUSPEND, ret, depth+1); | |
6799 | ret->flags = 0; | |
6800 | ender = reg_node(pRExC_state, TAIL); | |
6801 | REGTAIL(pRExC_state, ret, ender); | |
6802 | /*ret= ender;*/ | |
6803 | } | |
6804 | ||
6805 | if (RExC_parse < RExC_end && ISMULT2(RExC_parse)) { | |
830247a4 | 6806 | RExC_parse++; |
b45f050a JF |
6807 | vFAIL("Nested quantifiers"); |
6808 | } | |
a0d0e21e LW |
6809 | |
6810 | return(ret); | |
a687059c LW |
6811 | } |
6812 | ||
fc8cd66c YO |
6813 | |
6814 | /* reg_namedseq(pRExC_state,UVp) | |
6815 | ||
6816 | This is expected to be called by a parser routine that has | |
afefe6bf | 6817 | recognized '\N' and needs to handle the rest. RExC_parse is |
fc8cd66c YO |
6818 | expected to point at the first char following the N at the time |
6819 | of the call. | |
ff3f963a KW |
6820 | |
6821 | The \N may be inside (indicated by valuep not being NULL) or outside a | |
6822 | character class. | |
6823 | ||
6824 | \N may begin either a named sequence, or if outside a character class, mean | |
6825 | to match a non-newline. For non single-quoted regexes, the tokenizer has | |
6826 | attempted to decide which, and in the case of a named sequence converted it | |
6827 | into one of the forms: \N{} (if the sequence is null), or \N{U+c1.c2...}, | |
6828 | where c1... are the characters in the sequence. For single-quoted regexes, | |
6829 | the tokenizer passes the \N sequence through unchanged; this code will not | |
6830 | attempt to determine this nor expand those. The net effect is that if the | |
6831 | beginning of the passed-in pattern isn't '{U+' or there is no '}', it | |
6832 | signals that this \N occurrence means to match a non-newline. | |
6833 | ||
6834 | Only the \N{U+...} form should occur in a character class, for the same | |
6835 | reason that '.' inside a character class means to just match a period: it | |
6836 | just doesn't make sense. | |
fc8cd66c YO |
6837 | |
6838 | If valuep is non-null then it is assumed that we are parsing inside | |
6839 | of a charclass definition and the first codepoint in the resolved | |
6840 | string is returned via *valuep and the routine will return NULL. | |
6841 | In this mode if a multichar string is returned from the charnames | |
ff3f963a | 6842 | handler, a warning will be issued, and only the first char in the |
fc8cd66c YO |
6843 | sequence will be examined. If the string returned is zero length |
6844 | then the value of *valuep is undefined and NON-NULL will | |
6845 | be returned to indicate failure. (This will NOT be a valid pointer | |
6846 | to a regnode.) | |
6847 | ||
ff3f963a KW |
6848 | If valuep is null then it is assumed that we are parsing normal text and a |
6849 | new EXACT node is inserted into the program containing the resolved string, | |
6850 | and a pointer to the new node is returned. But if the string is zero length | |
6851 | a NOTHING node is emitted instead. | |
afefe6bf | 6852 | |
fc8cd66c | 6853 | On success RExC_parse is set to the char following the endbrace. |
ff3f963a | 6854 | Parsing failures will generate a fatal error via vFAIL(...) |
fc8cd66c YO |
6855 | */ |
6856 | STATIC regnode * | |
afefe6bf | 6857 | S_reg_namedseq(pTHX_ RExC_state_t *pRExC_state, UV *valuep, I32 *flagp) |
fc8cd66c | 6858 | { |
c3c41406 | 6859 | char * endbrace; /* '}' following the name */ |
fc8cd66c | 6860 | regnode *ret = NULL; |
ff3f963a KW |
6861 | #ifdef DEBUGGING |
6862 | char* parse_start = RExC_parse - 2; /* points to the '\N' */ | |
6863 | #endif | |
c3c41406 | 6864 | char* p; |
ff3f963a KW |
6865 | |
6866 | GET_RE_DEBUG_FLAGS_DECL; | |
7918f24d NC |
6867 | |
6868 | PERL_ARGS_ASSERT_REG_NAMEDSEQ; | |
ff3f963a KW |
6869 | |
6870 | GET_RE_DEBUG_FLAGS; | |
c3c41406 KW |
6871 | |
6872 | /* The [^\n] meaning of \N ignores spaces and comments under the /x | |
6873 | * modifier. The other meaning does not */ | |
6874 | p = (RExC_flags & RXf_PMf_EXTENDED) | |
6875 | ? regwhite( pRExC_state, RExC_parse ) | |
6876 | : RExC_parse; | |
7918f24d | 6877 | |
ff3f963a | 6878 | /* Disambiguate between \N meaning a named character versus \N meaning |
c3c41406 KW |
6879 | * [^\n]. The former is assumed when it can't be the latter. */ |
6880 | if (*p != '{' || regcurly(p)) { | |
6881 | RExC_parse = p; | |
ff3f963a | 6882 | if (valuep) { |
afefe6bf | 6883 | /* no bare \N in a charclass */ |
ff3f963a KW |
6884 | vFAIL("\\N in a character class must be a named character: \\N{...}"); |
6885 | } | |
afefe6bf RGS |
6886 | nextchar(pRExC_state); |
6887 | ret = reg_node(pRExC_state, REG_ANY); | |
6888 | *flagp |= HASWIDTH|SIMPLE; | |
6889 | RExC_naughty++; | |
6890 | RExC_parse--; | |
6891 | Set_Node_Length(ret, 1); /* MJD */ | |
6892 | return ret; | |
fc8cd66c | 6893 | } |
a4893424 | 6894 | |
c3c41406 KW |
6895 | /* Here, we have decided it should be a named sequence */ |
6896 | ||
6897 | /* The test above made sure that the next real character is a '{', but | |
6898 | * under the /x modifier, it could be separated by space (or a comment and | |
6899 | * \n) and this is not allowed (for consistency with \x{...} and the | |
6900 | * tokenizer handling of \N{NAME}). */ | |
6901 | if (*RExC_parse != '{') { | |
6902 | vFAIL("Missing braces on \\N{}"); | |
6903 | } | |
6904 | ||
ff3f963a | 6905 | RExC_parse++; /* Skip past the '{' */ |
c3c41406 KW |
6906 | |
6907 | if (! (endbrace = strchr(RExC_parse, '}')) /* no trailing brace */ | |
6908 | || ! (endbrace == RExC_parse /* nothing between the {} */ | |
6909 | || (endbrace - RExC_parse >= 2 /* U+ (bad hex is checked below */ | |
6910 | && strnEQ(RExC_parse, "U+", 2)))) /* for a better error msg) */ | |
6911 | { | |
6912 | if (endbrace) RExC_parse = endbrace; /* position msg's '<--HERE' */ | |
6913 | vFAIL("\\N{NAME} must be resolved by the lexer"); | |
6914 | } | |
6915 | ||
ff3f963a KW |
6916 | if (endbrace == RExC_parse) { /* empty: \N{} */ |
6917 | if (! valuep) { | |
6918 | RExC_parse = endbrace + 1; | |
6919 | return reg_node(pRExC_state,NOTHING); | |
a4893424 | 6920 | } |
fc8cd66c | 6921 | |
ff3f963a KW |
6922 | if (SIZE_ONLY) { |
6923 | ckWARNreg(RExC_parse, | |
6924 | "Ignoring zero length \\N{} in character class" | |
6925 | ); | |
6926 | RExC_parse = endbrace + 1; | |
6927 | } | |
6928 | *valuep = 0; | |
6929 | return (regnode *) &RExC_parse; /* Invalid regnode pointer */ | |
fc8cd66c | 6930 | } |
ff3f963a | 6931 | |
62fed28b | 6932 | REQUIRE_UTF8; /* named sequences imply Unicode semantics */ |
ff3f963a KW |
6933 | RExC_parse += 2; /* Skip past the 'U+' */ |
6934 | ||
6935 | if (valuep) { /* In a bracketed char class */ | |
6936 | /* We only pay attention to the first char of | |
6937 | multichar strings being returned. I kinda wonder | |
6938 | if this makes sense as it does change the behaviour | |
6939 | from earlier versions, OTOH that behaviour was broken | |
6940 | as well. XXX Solution is to recharacterize as | |
6941 | [rest-of-class]|multi1|multi2... */ | |
6942 | ||
6943 | STRLEN length_of_hex; | |
6944 | I32 flags = PERL_SCAN_ALLOW_UNDERSCORES | |
6945 | | PERL_SCAN_DISALLOW_PREFIX | |
6946 | | (SIZE_ONLY ? PERL_SCAN_SILENT_ILLDIGIT : 0); | |
6947 | ||
37820adc KW |
6948 | char * endchar = RExC_parse + strcspn(RExC_parse, ".}"); |
6949 | if (endchar < endbrace) { | |
ff3f963a KW |
6950 | ckWARNreg(endchar, "Using just the first character returned by \\N{} in character class"); |
6951 | } | |
ff3f963a KW |
6952 | |
6953 | length_of_hex = (STRLEN)(endchar - RExC_parse); | |
6954 | *valuep = grok_hex(RExC_parse, &length_of_hex, &flags, NULL); | |
6955 | ||
6956 | /* The tokenizer should have guaranteed validity, but it's possible to | |
6957 | * bypass it by using single quoting, so check */ | |
c3c41406 KW |
6958 | if (length_of_hex == 0 |
6959 | || length_of_hex != (STRLEN)(endchar - RExC_parse) ) | |
6960 | { | |
6961 | RExC_parse += length_of_hex; /* Includes all the valid */ | |
6962 | RExC_parse += (RExC_orig_utf8) /* point to after 1st invalid */ | |
6963 | ? UTF8SKIP(RExC_parse) | |
6964 | : 1; | |
6965 | /* Guard against malformed utf8 */ | |
6966 | if (RExC_parse >= endchar) RExC_parse = endchar; | |
6967 | vFAIL("Invalid hexadecimal number in \\N{U+...}"); | |
ff3f963a KW |
6968 | } |
6969 | ||
6970 | RExC_parse = endbrace + 1; | |
6971 | if (endchar == endbrace) return NULL; | |
6972 | ||
6973 | ret = (regnode *) &RExC_parse; /* Invalid regnode pointer */ | |
fc8cd66c | 6974 | } |
ff3f963a KW |
6975 | else { /* Not a char class */ |
6976 | char *s; /* String to put in generated EXACT node */ | |
fda99bee | 6977 | STRLEN len = 0; /* Its current byte length */ |
ff3f963a KW |
6978 | char *endchar; /* Points to '.' or '}' ending cur char in the input |
6979 | stream */ | |
6980 | ||
6981 | ret = reg_node(pRExC_state, | |
6982 | (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT)); | |
6983 | s= STRING(ret); | |
6984 | ||
6985 | /* Exact nodes can hold only a U8 length's of text = 255. Loop through | |
6986 | * the input which is of the form now 'c1.c2.c3...}' until find the | |
fda99bee | 6987 | * ending brace or exceed length 255. The characters that exceed this |
ff3f963a KW |
6988 | * limit are dropped. The limit could be relaxed should it become |
6989 | * desirable by reparsing this as (?:\N{NAME}), so could generate | |
6990 | * multiple EXACT nodes, as is done for just regular input. But this | |
6991 | * is primarily a named character, and not intended to be a huge long | |
6992 | * string, so 255 bytes should be good enough */ | |
6993 | while (1) { | |
c3c41406 | 6994 | STRLEN length_of_hex; |
ff3f963a KW |
6995 | I32 grok_flags = PERL_SCAN_ALLOW_UNDERSCORES |
6996 | | PERL_SCAN_DISALLOW_PREFIX | |
6997 | | (SIZE_ONLY ? PERL_SCAN_SILENT_ILLDIGIT : 0); | |
6998 | UV cp; /* Ord of current character */ | |
6999 | ||
7000 | /* Code points are separated by dots. If none, there is only one | |
7001 | * code point, and is terminated by the brace */ | |
37820adc | 7002 | endchar = RExC_parse + strcspn(RExC_parse, ".}"); |
ff3f963a KW |
7003 | |
7004 | /* The values are Unicode even on EBCDIC machines */ | |
c3c41406 KW |
7005 | length_of_hex = (STRLEN)(endchar - RExC_parse); |
7006 | cp = grok_hex(RExC_parse, &length_of_hex, &grok_flags, NULL); | |
7007 | if ( length_of_hex == 0 | |
7008 | || length_of_hex != (STRLEN)(endchar - RExC_parse) ) | |
ff3f963a | 7009 | { |
c3c41406 KW |
7010 | RExC_parse += length_of_hex; /* Includes all the valid */ |
7011 | RExC_parse += (RExC_orig_utf8) /* point to after 1st invalid */ | |
7012 | ? UTF8SKIP(RExC_parse) | |
7013 | : 1; | |
7014 | /* Guard against malformed utf8 */ | |
7015 | if (RExC_parse >= endchar) RExC_parse = endchar; | |
7016 | vFAIL("Invalid hexadecimal number in \\N{U+...}"); | |
ff3f963a KW |
7017 | } |
7018 | ||
7019 | if (! FOLD) { /* Not folding, just append to the string */ | |
7020 | STRLEN unilen; | |
7021 | ||
7022 | /* Quit before adding this character if would exceed limit */ | |
7023 | if (len + UNISKIP(cp) > U8_MAX) break; | |
fc8cd66c | 7024 | |
ff3f963a KW |
7025 | unilen = reguni(pRExC_state, cp, s); |
7026 | if (unilen > 0) { | |
7027 | s += unilen; | |
7028 | len += unilen; | |
7029 | } | |
7030 | } else { /* Folding, output the folded equivalent */ | |
7031 | STRLEN foldlen,numlen; | |
7032 | U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf; | |
7033 | cp = toFOLD_uni(cp, tmpbuf, &foldlen); | |
7034 | ||
7035 | /* Quit before exceeding size limit */ | |
7036 | if (len + foldlen > U8_MAX) break; | |
7037 | ||
7038 | for (foldbuf = tmpbuf; | |
7039 | foldlen; | |
7040 | foldlen -= numlen) | |
7041 | { | |
7042 | cp = utf8_to_uvchr(foldbuf, &numlen); | |
7043 | if (numlen > 0) { | |
7044 | const STRLEN unilen = reguni(pRExC_state, cp, s); | |
7045 | s += unilen; | |
7046 | len += unilen; | |
7047 | /* In EBCDIC the numlen and unilen can differ. */ | |
7048 | foldbuf += numlen; | |
7049 | if (numlen >= foldlen) | |
7050 | break; | |
7051 | } | |
7052 | else | |
7053 | break; /* "Can't happen." */ | |
7054 | } | |
7055 | } | |
7056 | ||
7057 | /* Point to the beginning of the next character in the sequence. */ | |
7058 | RExC_parse = endchar + 1; | |
7059 | ||
7060 | /* Quit if no more characters */ | |
7061 | if (RExC_parse >= endbrace) break; | |
7062 | } | |
7063 | ||
7064 | ||
7065 | if (SIZE_ONLY) { | |
7066 | if (RExC_parse < endbrace) { | |
7067 | ckWARNreg(RExC_parse - 1, | |
7068 | "Using just the first characters returned by \\N{}"); | |
7069 | } | |
7070 | ||
7071 | RExC_size += STR_SZ(len); | |
7072 | } else { | |
7073 | STR_LEN(ret) = len; | |
7074 | RExC_emit += STR_SZ(len); | |
7075 | } | |
7076 | ||
7077 | RExC_parse = endbrace + 1; | |
7078 | ||
7079 | *flagp |= HASWIDTH; /* Not SIMPLE, as that causes the engine to fail | |
7080 | with malformed in t/re/pat_advanced.t */ | |
7081 | RExC_parse --; | |
7082 | Set_Node_Cur_Length(ret); /* MJD */ | |
7083 | nextchar(pRExC_state); | |
7084 | } | |
7085 | ||
7086 | return ret; | |
fc8cd66c YO |
7087 | } |
7088 | ||
7089 | ||
9e08bc66 TS |
7090 | /* |
7091 | * reg_recode | |
7092 | * | |
7093 | * It returns the code point in utf8 for the value in *encp. | |
7094 | * value: a code value in the source encoding | |
7095 | * encp: a pointer to an Encode object | |
7096 | * | |
7097 | * If the result from Encode is not a single character, | |
7098 | * it returns U+FFFD (Replacement character) and sets *encp to NULL. | |
7099 | */ | |
7100 | STATIC UV | |
7101 | S_reg_recode(pTHX_ const char value, SV **encp) | |
7102 | { | |
7103 | STRLEN numlen = 1; | |
59cd0e26 | 7104 | SV * const sv = newSVpvn_flags(&value, numlen, SVs_TEMP); |
c86f7df5 | 7105 | const char * const s = *encp ? sv_recode_to_utf8(sv, *encp) : SvPVX(sv); |
9e08bc66 TS |
7106 | const STRLEN newlen = SvCUR(sv); |
7107 | UV uv = UNICODE_REPLACEMENT; | |
7108 | ||
7918f24d NC |
7109 | PERL_ARGS_ASSERT_REG_RECODE; |
7110 | ||
9e08bc66 TS |
7111 | if (newlen) |
7112 | uv = SvUTF8(sv) | |
7113 | ? utf8n_to_uvchr((U8*)s, newlen, &numlen, UTF8_ALLOW_DEFAULT) | |
7114 | : *(U8*)s; | |
7115 | ||
7116 | if (!newlen || numlen != newlen) { | |
7117 | uv = UNICODE_REPLACEMENT; | |
c86f7df5 | 7118 | *encp = NULL; |
9e08bc66 TS |
7119 | } |
7120 | return uv; | |
7121 | } | |
7122 | ||
fc8cd66c | 7123 | |
a687059c LW |
7124 | /* |
7125 | - regatom - the lowest level | |
ee9b8eae YO |
7126 | |
7127 | Try to identify anything special at the start of the pattern. If there | |
7128 | is, then handle it as required. This may involve generating a single regop, | |
7129 | such as for an assertion; or it may involve recursing, such as to | |
7130 | handle a () structure. | |
7131 | ||
7132 | If the string doesn't start with something special then we gobble up | |
7133 | as much literal text as we can. | |
7134 | ||
7135 | Once we have been able to handle whatever type of thing started the | |
7136 | sequence, we return. | |
7137 | ||
7138 | Note: we have to be careful with escapes, as they can be both literal | |
7139 | and special, and in the case of \10 and friends can either, depending | |
7140 | on context. Specifically there are two seperate switches for handling | |
7141 | escape sequences, with the one for handling literal escapes requiring | |
7142 | a dummy entry for all of the special escapes that are actually handled | |
7143 | by the other. | |
7144 | */ | |
7145 | ||
76e3520e | 7146 | STATIC regnode * |
3dab1dad | 7147 | S_regatom(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth) |
a687059c | 7148 | { |
97aff369 | 7149 | dVAR; |
cbbf8932 | 7150 | register regnode *ret = NULL; |
a0d0e21e | 7151 | I32 flags; |
45948336 | 7152 | char *parse_start = RExC_parse; |
3dab1dad YO |
7153 | GET_RE_DEBUG_FLAGS_DECL; |
7154 | DEBUG_PARSE("atom"); | |
a0d0e21e LW |
7155 | *flagp = WORST; /* Tentatively. */ |
7156 | ||
7918f24d | 7157 | PERL_ARGS_ASSERT_REGATOM; |
ee9b8eae | 7158 | |
a0d0e21e | 7159 | tryagain: |
f9a79580 | 7160 | switch ((U8)*RExC_parse) { |
a0d0e21e | 7161 | case '^': |
830247a4 IZ |
7162 | RExC_seen_zerolen++; |
7163 | nextchar(pRExC_state); | |
bbe252da | 7164 | if (RExC_flags & RXf_PMf_MULTILINE) |
830247a4 | 7165 | ret = reg_node(pRExC_state, MBOL); |
bbe252da | 7166 | else if (RExC_flags & RXf_PMf_SINGLELINE) |
830247a4 | 7167 | ret = reg_node(pRExC_state, SBOL); |
a0d0e21e | 7168 | else |
830247a4 | 7169 | ret = reg_node(pRExC_state, BOL); |
fac92740 | 7170 | Set_Node_Length(ret, 1); /* MJD */ |
a0d0e21e LW |
7171 | break; |
7172 | case '$': | |
830247a4 | 7173 | nextchar(pRExC_state); |
b81d288d | 7174 | if (*RExC_parse) |
830247a4 | 7175 | RExC_seen_zerolen++; |
bbe252da | 7176 | if (RExC_flags & RXf_PMf_MULTILINE) |
830247a4 | 7177 | ret = reg_node(pRExC_state, MEOL); |
bbe252da | 7178 | else if (RExC_flags & RXf_PMf_SINGLELINE) |
830247a4 | 7179 | ret = reg_node(pRExC_state, SEOL); |
a0d0e21e | 7180 | else |
830247a4 | 7181 | ret = reg_node(pRExC_state, EOL); |
fac92740 | 7182 | Set_Node_Length(ret, 1); /* MJD */ |
a0d0e21e LW |
7183 | break; |
7184 | case '.': | |
830247a4 | 7185 | nextchar(pRExC_state); |
bbe252da | 7186 | if (RExC_flags & RXf_PMf_SINGLELINE) |
ffc61ed2 JH |
7187 | ret = reg_node(pRExC_state, SANY); |
7188 | else | |
7189 | ret = reg_node(pRExC_state, REG_ANY); | |
7190 | *flagp |= HASWIDTH|SIMPLE; | |
830247a4 | 7191 | RExC_naughty++; |
fac92740 | 7192 | Set_Node_Length(ret, 1); /* MJD */ |
a0d0e21e LW |
7193 | break; |
7194 | case '[': | |
b45f050a | 7195 | { |
3dab1dad YO |
7196 | char * const oregcomp_parse = ++RExC_parse; |
7197 | ret = regclass(pRExC_state,depth+1); | |
830247a4 IZ |
7198 | if (*RExC_parse != ']') { |
7199 | RExC_parse = oregcomp_parse; | |
b45f050a JF |
7200 | vFAIL("Unmatched ["); |
7201 | } | |
830247a4 | 7202 | nextchar(pRExC_state); |
a0d0e21e | 7203 | *flagp |= HASWIDTH|SIMPLE; |
fac92740 | 7204 | Set_Node_Length(ret, RExC_parse - oregcomp_parse + 1); /* MJD */ |
a0d0e21e | 7205 | break; |
b45f050a | 7206 | } |
a0d0e21e | 7207 | case '(': |
830247a4 | 7208 | nextchar(pRExC_state); |
3dab1dad | 7209 | ret = reg(pRExC_state, 1, &flags,depth+1); |
a0d0e21e | 7210 | if (ret == NULL) { |
bf93d4cc | 7211 | if (flags & TRYAGAIN) { |
830247a4 | 7212 | if (RExC_parse == RExC_end) { |
bf93d4cc GS |
7213 | /* Make parent create an empty node if needed. */ |
7214 | *flagp |= TRYAGAIN; | |
7215 | return(NULL); | |
7216 | } | |
a0d0e21e | 7217 | goto tryagain; |
bf93d4cc | 7218 | } |
a0d0e21e LW |
7219 | return(NULL); |
7220 | } | |
a3b492c3 | 7221 | *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE|POSTPONED); |
a0d0e21e LW |
7222 | break; |
7223 | case '|': | |
7224 | case ')': | |
7225 | if (flags & TRYAGAIN) { | |
7226 | *flagp |= TRYAGAIN; | |
7227 | return NULL; | |
7228 | } | |
b45f050a | 7229 | vFAIL("Internal urp"); |
a0d0e21e LW |
7230 | /* Supposed to be caught earlier. */ |
7231 | break; | |
85afd4ae | 7232 | case '{': |
830247a4 IZ |
7233 | if (!regcurly(RExC_parse)) { |
7234 | RExC_parse++; | |
85afd4ae CS |
7235 | goto defchar; |
7236 | } | |
7237 | /* FALL THROUGH */ | |
a0d0e21e LW |
7238 | case '?': |
7239 | case '+': | |
7240 | case '*': | |
830247a4 | 7241 | RExC_parse++; |
b45f050a | 7242 | vFAIL("Quantifier follows nothing"); |
a0d0e21e | 7243 | break; |
f9a79580 RGS |
7244 | case 0xDF: |
7245 | case 0xC3: | |
7246 | case 0xCE: | |
a0a388a1 | 7247 | do_foldchar: |
56d400ed | 7248 | if (!LOC && FOLD) { |
e64b1bd1 | 7249 | U32 len,cp; |
7cf3a6a3 | 7250 | len=0; /* silence a spurious compiler warning */ |
56d400ed | 7251 | if ((cp = what_len_TRICKYFOLD_safe(RExC_parse,RExC_end,UTF,len))) { |
e64b1bd1 YO |
7252 | *flagp |= HASWIDTH; /* could be SIMPLE too, but needs a handler in regexec.regrepeat */ |
7253 | RExC_parse+=len-1; /* we get one from nextchar() as well. :-( */ | |
7254 | ret = reganode(pRExC_state, FOLDCHAR, cp); | |
7255 | Set_Node_Length(ret, 1); /* MJD */ | |
7256 | nextchar(pRExC_state); /* kill whitespace under /x */ | |
7257 | return ret; | |
7258 | } | |
7259 | } | |
7260 | goto outer_default; | |
a0d0e21e | 7261 | case '\\': |
ee9b8eae YO |
7262 | /* Special Escapes |
7263 | ||
7264 | This switch handles escape sequences that resolve to some kind | |
7265 | of special regop and not to literal text. Escape sequnces that | |
7266 | resolve to literal text are handled below in the switch marked | |
7267 | "Literal Escapes". | |
7268 | ||
7269 | Every entry in this switch *must* have a corresponding entry | |
7270 | in the literal escape switch. However, the opposite is not | |
7271 | required, as the default for this switch is to jump to the | |
7272 | literal text handling code. | |
7273 | */ | |
a0a388a1 YO |
7274 | switch ((U8)*++RExC_parse) { |
7275 | case 0xDF: | |
7276 | case 0xC3: | |
7277 | case 0xCE: | |
7278 | goto do_foldchar; | |
ee9b8eae | 7279 | /* Special Escapes */ |
a0d0e21e | 7280 | case 'A': |
830247a4 IZ |
7281 | RExC_seen_zerolen++; |
7282 | ret = reg_node(pRExC_state, SBOL); | |
a0d0e21e | 7283 | *flagp |= SIMPLE; |
ee9b8eae | 7284 | goto finish_meta_pat; |
a0d0e21e | 7285 | case 'G': |
830247a4 IZ |
7286 | ret = reg_node(pRExC_state, GPOS); |
7287 | RExC_seen |= REG_SEEN_GPOS; | |
a0d0e21e | 7288 | *flagp |= SIMPLE; |
ee9b8eae YO |
7289 | goto finish_meta_pat; |
7290 | case 'K': | |
7291 | RExC_seen_zerolen++; | |
7292 | ret = reg_node(pRExC_state, KEEPS); | |
7293 | *flagp |= SIMPLE; | |
37923168 RGS |
7294 | /* XXX:dmq : disabling in-place substitution seems to |
7295 | * be necessary here to avoid cases of memory corruption, as | |
7296 | * with: C<$_="x" x 80; s/x\K/y/> -- rgs | |
7297 | */ | |
7298 | RExC_seen |= REG_SEEN_LOOKBEHIND; | |
ee9b8eae | 7299 | goto finish_meta_pat; |
a0d0e21e | 7300 | case 'Z': |
830247a4 | 7301 | ret = reg_node(pRExC_state, SEOL); |
a0d0e21e | 7302 | *flagp |= SIMPLE; |
a1917ab9 | 7303 | RExC_seen_zerolen++; /* Do not optimize RE away */ |
ee9b8eae | 7304 | goto finish_meta_pat; |
b85d18e9 | 7305 | case 'z': |
830247a4 | 7306 | ret = reg_node(pRExC_state, EOS); |
b85d18e9 | 7307 | *flagp |= SIMPLE; |
830247a4 | 7308 | RExC_seen_zerolen++; /* Do not optimize RE away */ |
ee9b8eae | 7309 | goto finish_meta_pat; |
4a2d328f | 7310 | case 'C': |
f33976b4 DB |
7311 | ret = reg_node(pRExC_state, CANY); |
7312 | RExC_seen |= REG_SEEN_CANY; | |
a0ed51b3 | 7313 | *flagp |= HASWIDTH|SIMPLE; |
ee9b8eae | 7314 | goto finish_meta_pat; |
a0ed51b3 | 7315 | case 'X': |
830247a4 | 7316 | ret = reg_node(pRExC_state, CLUMP); |
a0ed51b3 | 7317 | *flagp |= HASWIDTH; |
ee9b8eae | 7318 | goto finish_meta_pat; |
a0d0e21e | 7319 | case 'w': |
a12cf05f KW |
7320 | if (LOC) { |
7321 | ret = reg_node(pRExC_state, (U8)(ALNUML)); | |
7322 | } else { | |
7323 | ret = reg_node(pRExC_state, (U8)(ALNUM)); | |
7324 | FLAGS(ret) = (UNI_SEMANTICS) ? USE_UNI : 0; | |
7325 | } | |
a0d0e21e | 7326 | *flagp |= HASWIDTH|SIMPLE; |
ee9b8eae | 7327 | goto finish_meta_pat; |
a0d0e21e | 7328 | case 'W': |
a12cf05f KW |
7329 | if (LOC) { |
7330 | ret = reg_node(pRExC_state, (U8)(NALNUML)); | |
7331 | } else { | |
7332 | ret = reg_node(pRExC_state, (U8)(NALNUM)); | |
7333 | FLAGS(ret) = (UNI_SEMANTICS) ? USE_UNI : 0; | |
7334 | } | |
a0d0e21e | 7335 | *flagp |= HASWIDTH|SIMPLE; |
ee9b8eae | 7336 | goto finish_meta_pat; |
a0d0e21e | 7337 | case 'b': |
830247a4 IZ |
7338 | RExC_seen_zerolen++; |
7339 | RExC_seen |= REG_SEEN_LOOKBEHIND; | |
a12cf05f KW |
7340 | if (LOC) { |
7341 | ret = reg_node(pRExC_state, (U8)(BOUNDL)); | |
7342 | } else { | |
7343 | ret = reg_node(pRExC_state, (U8)(BOUND)); | |
7344 | FLAGS(ret) = (UNI_SEMANTICS) ? USE_UNI : 0; | |
7345 | } | |
a0d0e21e | 7346 | *flagp |= SIMPLE; |
ee9b8eae | 7347 | goto finish_meta_pat; |
a0d0e21e | 7348 | case 'B': |
830247a4 IZ |
7349 | RExC_seen_zerolen++; |
7350 | RExC_seen |= REG_SEEN_LOOKBEHIND; | |
a12cf05f KW |
7351 | if (LOC) { |
7352 | ret = reg_node(pRExC_state, (U8)(NBOUNDL)); | |
7353 | } else { | |
7354 | ret = reg_node(pRExC_state, (U8)(NBOUND)); | |
7355 | FLAGS(ret) = (UNI_SEMANTICS) ? USE_UNI : 0; | |
7356 | } | |
a0d0e21e | 7357 | *flagp |= SIMPLE; |
ee9b8eae | 7358 | goto finish_meta_pat; |
a0d0e21e | 7359 | case 's': |
a12cf05f KW |
7360 | if (LOC) { |
7361 | ret = reg_node(pRExC_state, (U8)(SPACEL)); | |
7362 | } else { | |
7363 | ret = reg_node(pRExC_state, (U8)(SPACE)); | |
7364 | FLAGS(ret) = (UNI_SEMANTICS) ? USE_UNI : 0; | |
7365 | } | |
a0d0e21e | 7366 | *flagp |= HASWIDTH|SIMPLE; |
ee9b8eae | 7367 | goto finish_meta_pat; |
a0d0e21e | 7368 | case 'S': |
a12cf05f KW |
7369 | if (LOC) { |
7370 | ret = reg_node(pRExC_state, (U8)(NSPACEL)); | |
7371 | } else { | |
7372 | ret = reg_node(pRExC_state, (U8)(NSPACE)); | |
7373 | FLAGS(ret) = (UNI_SEMANTICS) ? USE_UNI : 0; | |
7374 | } | |
a0d0e21e | 7375 | *flagp |= HASWIDTH|SIMPLE; |
ee9b8eae | 7376 | goto finish_meta_pat; |
a0d0e21e | 7377 | case 'd': |
ffc61ed2 | 7378 | ret = reg_node(pRExC_state, DIGIT); |
a0d0e21e | 7379 | *flagp |= HASWIDTH|SIMPLE; |
ee9b8eae | 7380 | goto finish_meta_pat; |
a0d0e21e | 7381 | case 'D': |
ffc61ed2 | 7382 | ret = reg_node(pRExC_state, NDIGIT); |
a0d0e21e | 7383 | *flagp |= HASWIDTH|SIMPLE; |
ee9b8eae | 7384 | goto finish_meta_pat; |
e1d1eefb YO |
7385 | case 'R': |
7386 | ret = reg_node(pRExC_state, LNBREAK); | |
7387 | *flagp |= HASWIDTH|SIMPLE; | |
7388 | goto finish_meta_pat; | |
7389 | case 'h': | |
7390 | ret = reg_node(pRExC_state, HORIZWS); | |
7391 | *flagp |= HASWIDTH|SIMPLE; | |
7392 | goto finish_meta_pat; | |
7393 | case 'H': | |
7394 | ret = reg_node(pRExC_state, NHORIZWS); | |
7395 | *flagp |= HASWIDTH|SIMPLE; | |
7396 | goto finish_meta_pat; | |
ee9b8eae | 7397 | case 'v': |
e1d1eefb YO |
7398 | ret = reg_node(pRExC_state, VERTWS); |
7399 | *flagp |= HASWIDTH|SIMPLE; | |
ee9b8eae YO |
7400 | goto finish_meta_pat; |
7401 | case 'V': | |
e1d1eefb YO |
7402 | ret = reg_node(pRExC_state, NVERTWS); |
7403 | *flagp |= HASWIDTH|SIMPLE; | |
ee9b8eae | 7404 | finish_meta_pat: |
830247a4 | 7405 | nextchar(pRExC_state); |
fac92740 | 7406 | Set_Node_Length(ret, 2); /* MJD */ |
ee9b8eae | 7407 | break; |
a14b48bc LW |
7408 | case 'p': |
7409 | case 'P': | |
3568d838 | 7410 | { |
3dab1dad | 7411 | char* const oldregxend = RExC_end; |
d008bc60 | 7412 | #ifdef DEBUGGING |
ccb2c380 | 7413 | char* parse_start = RExC_parse - 2; |
d008bc60 | 7414 | #endif |
a14b48bc | 7415 | |
830247a4 | 7416 | if (RExC_parse[1] == '{') { |
3568d838 | 7417 | /* a lovely hack--pretend we saw [\pX] instead */ |
830247a4 IZ |
7418 | RExC_end = strchr(RExC_parse, '}'); |
7419 | if (!RExC_end) { | |
3dab1dad | 7420 | const U8 c = (U8)*RExC_parse; |
830247a4 IZ |
7421 | RExC_parse += 2; |
7422 | RExC_end = oldregxend; | |
0da60cf5 | 7423 | vFAIL2("Missing right brace on \\%c{}", c); |
b45f050a | 7424 | } |
830247a4 | 7425 | RExC_end++; |
a14b48bc | 7426 | } |
af6f566e | 7427 | else { |
830247a4 | 7428 | RExC_end = RExC_parse + 2; |
af6f566e HS |
7429 | if (RExC_end > oldregxend) |
7430 | RExC_end = oldregxend; | |
7431 | } | |
830247a4 | 7432 | RExC_parse--; |
a14b48bc | 7433 | |
3dab1dad | 7434 | ret = regclass(pRExC_state,depth+1); |
a14b48bc | 7435 | |
830247a4 IZ |
7436 | RExC_end = oldregxend; |
7437 | RExC_parse--; | |
ccb2c380 MP |
7438 | |
7439 | Set_Node_Offset(ret, parse_start + 2); | |
7440 | Set_Node_Cur_Length(ret); | |
830247a4 | 7441 | nextchar(pRExC_state); |
a14b48bc LW |
7442 | *flagp |= HASWIDTH|SIMPLE; |
7443 | } | |
7444 | break; | |
fc8cd66c | 7445 | case 'N': |
afefe6bf | 7446 | /* Handle \N and \N{NAME} here and not below because it can be |
fc8cd66c YO |
7447 | multicharacter. join_exact() will join them up later on. |
7448 | Also this makes sure that things like /\N{BLAH}+/ and | |
7449 | \N{BLAH} being multi char Just Happen. dmq*/ | |
7450 | ++RExC_parse; | |
afefe6bf | 7451 | ret= reg_namedseq(pRExC_state, NULL, flagp); |
fc8cd66c | 7452 | break; |
0a4db386 | 7453 | case 'k': /* Handle \k<NAME> and \k'NAME' */ |
1f1031fe | 7454 | parse_named_seq: |
81714fb9 YO |
7455 | { |
7456 | char ch= RExC_parse[1]; | |
1f1031fe YO |
7457 | if (ch != '<' && ch != '\'' && ch != '{') { |
7458 | RExC_parse++; | |
7459 | vFAIL2("Sequence %.2s... not terminated",parse_start); | |
81714fb9 | 7460 | } else { |
1f1031fe YO |
7461 | /* this pretty much dupes the code for (?P=...) in reg(), if |
7462 | you change this make sure you change that */ | |
81714fb9 | 7463 | char* name_start = (RExC_parse += 2); |
2eccd3b2 | 7464 | U32 num = 0; |
0a4db386 YO |
7465 | SV *sv_dat = reg_scan_name(pRExC_state, |
7466 | SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA); | |
1f1031fe | 7467 | ch= (ch == '<') ? '>' : (ch == '{') ? '}' : '\''; |
81714fb9 | 7468 | if (RExC_parse == name_start || *RExC_parse != ch) |
1f1031fe YO |
7469 | vFAIL2("Sequence %.3s... not terminated",parse_start); |
7470 | ||
7471 | if (!SIZE_ONLY) { | |
7472 | num = add_data( pRExC_state, 1, "S" ); | |
7473 | RExC_rxi->data->data[num]=(void*)sv_dat; | |
5a5094bd | 7474 | SvREFCNT_inc_simple_void(sv_dat); |
1f1031fe YO |
7475 | } |
7476 | ||
81714fb9 YO |
7477 | RExC_sawback = 1; |
7478 | ret = reganode(pRExC_state, | |
7479 | (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF), | |
7480 | num); | |
7481 | *flagp |= HASWIDTH; | |
1f1031fe | 7482 | |
81714fb9 YO |
7483 | /* override incorrect value set in reganode MJD */ |
7484 | Set_Node_Offset(ret, parse_start+1); | |
7485 | Set_Node_Cur_Length(ret); /* MJD */ | |
7486 | nextchar(pRExC_state); | |
1f1031fe | 7487 | |
81714fb9 YO |
7488 | } |
7489 | break; | |
1f1031fe | 7490 | } |
2bf803e2 | 7491 | case 'g': |
a0d0e21e LW |
7492 | case '1': case '2': case '3': case '4': |
7493 | case '5': case '6': case '7': case '8': case '9': | |
7494 | { | |
c74340f9 | 7495 | I32 num; |
2bf803e2 YO |
7496 | bool isg = *RExC_parse == 'g'; |
7497 | bool isrel = 0; | |
7498 | bool hasbrace = 0; | |
7499 | if (isg) { | |
c74340f9 | 7500 | RExC_parse++; |
2bf803e2 YO |
7501 | if (*RExC_parse == '{') { |
7502 | RExC_parse++; | |
7503 | hasbrace = 1; | |
7504 | } | |
7505 | if (*RExC_parse == '-') { | |
7506 | RExC_parse++; | |
7507 | isrel = 1; | |
7508 | } | |
1f1031fe YO |
7509 | if (hasbrace && !isDIGIT(*RExC_parse)) { |
7510 | if (isrel) RExC_parse--; | |
7511 | RExC_parse -= 2; | |
7512 | goto parse_named_seq; | |
7513 | } } | |
c74340f9 | 7514 | num = atoi(RExC_parse); |
b72d83b2 RGS |
7515 | if (isg && num == 0) |
7516 | vFAIL("Reference to invalid group 0"); | |
c74340f9 | 7517 | if (isrel) { |
5624f11d | 7518 | num = RExC_npar - num; |
c74340f9 YO |
7519 | if (num < 1) |
7520 | vFAIL("Reference to nonexistent or unclosed group"); | |
7521 | } | |
2bf803e2 | 7522 | if (!isg && num > 9 && num >= RExC_npar) |
a0d0e21e LW |
7523 | goto defchar; |
7524 | else { | |
3dab1dad | 7525 | char * const parse_start = RExC_parse - 1; /* MJD */ |
830247a4 IZ |
7526 | while (isDIGIT(*RExC_parse)) |
7527 | RExC_parse++; | |
1f1031fe YO |
7528 | if (parse_start == RExC_parse - 1) |
7529 | vFAIL("Unterminated \\g... pattern"); | |
2bf803e2 YO |
7530 | if (hasbrace) { |
7531 | if (*RExC_parse != '}') | |
7532 | vFAIL("Unterminated \\g{...} pattern"); | |
7533 | RExC_parse++; | |
7534 | } | |
c74340f9 YO |
7535 | if (!SIZE_ONLY) { |
7536 | if (num > (I32)RExC_rx->nparens) | |
7537 | vFAIL("Reference to nonexistent group"); | |
c74340f9 | 7538 | } |
830247a4 | 7539 | RExC_sawback = 1; |
eb160463 GS |
7540 | ret = reganode(pRExC_state, |
7541 | (U8)(FOLD ? (LOC ? REFFL : REFF) : REF), | |
7542 | num); | |
a0d0e21e | 7543 | *flagp |= HASWIDTH; |
2af232bd | 7544 | |
fac92740 | 7545 | /* override incorrect value set in reganode MJD */ |
2af232bd | 7546 | Set_Node_Offset(ret, parse_start+1); |
fac92740 | 7547 | Set_Node_Cur_Length(ret); /* MJD */ |
830247a4 IZ |
7548 | RExC_parse--; |
7549 | nextchar(pRExC_state); | |
a0d0e21e LW |
7550 | } |
7551 | } | |
7552 | break; | |
7553 | case '\0': | |
830247a4 | 7554 | if (RExC_parse >= RExC_end) |
b45f050a | 7555 | FAIL("Trailing \\"); |
a0d0e21e LW |
7556 | /* FALL THROUGH */ |
7557 | default: | |
a0288114 | 7558 | /* Do not generate "unrecognized" warnings here, we fall |
c9f97d15 | 7559 | back into the quick-grab loop below */ |
45948336 | 7560 | parse_start--; |
a0d0e21e LW |
7561 | goto defchar; |
7562 | } | |
7563 | break; | |
4633a7c4 LW |
7564 | |
7565 | case '#': | |
bbe252da | 7566 | if (RExC_flags & RXf_PMf_EXTENDED) { |
bcdf7404 | 7567 | if ( reg_skipcomment( pRExC_state ) ) |
4633a7c4 LW |
7568 | goto tryagain; |
7569 | } | |
7570 | /* FALL THROUGH */ | |
7571 | ||
f9a79580 RGS |
7572 | default: |
7573 | outer_default:{ | |
ba210ebe | 7574 | register STRLEN len; |
58ae7d3f | 7575 | register UV ender; |
a0d0e21e | 7576 | register char *p; |
3dab1dad | 7577 | char *s; |
80aecb99 | 7578 | STRLEN foldlen; |
89ebb4a3 | 7579 | U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf; |
f06dbbb7 JH |
7580 | |
7581 | parse_start = RExC_parse - 1; | |
a0d0e21e | 7582 | |
830247a4 | 7583 | RExC_parse++; |
a0d0e21e LW |
7584 | |
7585 | defchar: | |
58ae7d3f | 7586 | ender = 0; |
eb160463 GS |
7587 | ret = reg_node(pRExC_state, |
7588 | (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT)); | |
cd439c50 | 7589 | s = STRING(ret); |
830247a4 IZ |
7590 | for (len = 0, p = RExC_parse - 1; |
7591 | len < 127 && p < RExC_end; | |
a0d0e21e LW |
7592 | len++) |
7593 | { | |
3dab1dad | 7594 | char * const oldp = p; |
5b5a24f7 | 7595 | |
bbe252da | 7596 | if (RExC_flags & RXf_PMf_EXTENDED) |
bcdf7404 | 7597 | p = regwhite( pRExC_state, p ); |
f9a79580 RGS |
7598 | switch ((U8)*p) { |
7599 | case 0xDF: | |
7600 | case 0xC3: | |
7601 | case 0xCE: | |
56d400ed | 7602 | if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF)) |
f9a79580 | 7603 | goto normal_default; |
a0d0e21e LW |
7604 | case '^': |
7605 | case '$': | |
7606 | case '.': | |
7607 | case '[': | |
7608 | case '(': | |
7609 | case ')': | |
7610 | case '|': | |
7611 | goto loopdone; | |
7612 | case '\\': | |
ee9b8eae YO |
7613 | /* Literal Escapes Switch |
7614 | ||
7615 | This switch is meant to handle escape sequences that | |
7616 | resolve to a literal character. | |
7617 | ||
7618 | Every escape sequence that represents something | |
7619 | else, like an assertion or a char class, is handled | |
7620 | in the switch marked 'Special Escapes' above in this | |
7621 | routine, but also has an entry here as anything that | |
7622 | isn't explicitly mentioned here will be treated as | |
7623 | an unescaped equivalent literal. | |
7624 | */ | |
7625 | ||
a0a388a1 | 7626 | switch ((U8)*++p) { |
ee9b8eae | 7627 | /* These are all the special escapes. */ |
a0a388a1 YO |
7628 | case 0xDF: |
7629 | case 0xC3: | |
7630 | case 0xCE: | |
7631 | if (LOC || !FOLD || !is_TRICKYFOLD_safe(p,RExC_end,UTF)) | |
7632 | goto normal_default; | |
ee9b8eae YO |
7633 | case 'A': /* Start assertion */ |
7634 | case 'b': case 'B': /* Word-boundary assertion*/ | |
7635 | case 'C': /* Single char !DANGEROUS! */ | |
7636 | case 'd': case 'D': /* digit class */ | |
7637 | case 'g': case 'G': /* generic-backref, pos assertion */ | |
e1d1eefb | 7638 | case 'h': case 'H': /* HORIZWS */ |
ee9b8eae YO |
7639 | case 'k': case 'K': /* named backref, keep marker */ |
7640 | case 'N': /* named char sequence */ | |
38a44b82 | 7641 | case 'p': case 'P': /* Unicode property */ |
e1d1eefb | 7642 | case 'R': /* LNBREAK */ |
ee9b8eae | 7643 | case 's': case 'S': /* space class */ |
e1d1eefb | 7644 | case 'v': case 'V': /* VERTWS */ |
ee9b8eae YO |
7645 | case 'w': case 'W': /* word class */ |
7646 | case 'X': /* eXtended Unicode "combining character sequence" */ | |
7647 | case 'z': case 'Z': /* End of line/string assertion */ | |
a0d0e21e LW |
7648 | --p; |
7649 | goto loopdone; | |
ee9b8eae YO |
7650 | |
7651 | /* Anything after here is an escape that resolves to a | |
7652 | literal. (Except digits, which may or may not) | |
7653 | */ | |
a0d0e21e LW |
7654 | case 'n': |
7655 | ender = '\n'; | |
7656 | p++; | |
a687059c | 7657 | break; |
a0d0e21e LW |
7658 | case 'r': |
7659 | ender = '\r'; | |
7660 | p++; | |
a687059c | 7661 | break; |
a0d0e21e LW |
7662 | case 't': |
7663 | ender = '\t'; | |
7664 | p++; | |
a687059c | 7665 | break; |
a0d0e21e LW |
7666 | case 'f': |
7667 | ender = '\f'; | |
7668 | p++; | |
a687059c | 7669 | break; |
a0d0e21e | 7670 | case 'e': |
c7f1f016 | 7671 | ender = ASCII_TO_NATIVE('\033'); |
a0d0e21e | 7672 | p++; |
a687059c | 7673 | break; |
a0d0e21e | 7674 | case 'a': |
c7f1f016 | 7675 | ender = ASCII_TO_NATIVE('\007'); |
a0d0e21e | 7676 | p++; |
a687059c | 7677 | break; |
f0a2b745 KW |
7678 | case 'o': |
7679 | { | |
7680 | STRLEN brace_len = len; | |
00c0cb6d | 7681 | UV result; |
454155d9 KW |
7682 | const char* error_msg; |
7683 | ||
7684 | bool valid = grok_bslash_o(p, | |
7685 | &result, | |
7686 | &brace_len, | |
7687 | &error_msg, | |
7688 | 1); | |
7689 | p += brace_len; | |
7690 | if (! valid) { | |
7691 | RExC_parse = p; /* going to die anyway; point | |
7692 | to exact spot of failure */ | |
f0a2b745 KW |
7693 | vFAIL(error_msg); |
7694 | } | |
00c0cb6d DG |
7695 | else |
7696 | { | |
7697 | ender = result; | |
7698 | } | |
f0a2b745 KW |
7699 | if (PL_encoding && ender < 0x100) { |
7700 | goto recode_encoding; | |
7701 | } | |
7702 | if (ender > 0xff) { | |
62fed28b | 7703 | REQUIRE_UTF8; |
f0a2b745 KW |
7704 | } |
7705 | break; | |
7706 | } | |
a0d0e21e | 7707 | case 'x': |
a0ed51b3 | 7708 | if (*++p == '{') { |
1df70142 | 7709 | char* const e = strchr(p, '}'); |
b81d288d | 7710 | |
b45f050a | 7711 | if (!e) { |
830247a4 | 7712 | RExC_parse = p + 1; |
b45f050a JF |
7713 | vFAIL("Missing right brace on \\x{}"); |
7714 | } | |
de5f0749 | 7715 | else { |
a4c04bdc NC |
7716 | I32 flags = PERL_SCAN_ALLOW_UNDERSCORES |
7717 | | PERL_SCAN_DISALLOW_PREFIX; | |
1df70142 | 7718 | STRLEN numlen = e - p - 1; |
53305cf1 | 7719 | ender = grok_hex(p + 1, &numlen, &flags, NULL); |
aaa80028 | 7720 | if (ender > 0xff) |
62fed28b | 7721 | REQUIRE_UTF8; |
a0ed51b3 LW |
7722 | p = e + 1; |
7723 | } | |
a0ed51b3 LW |
7724 | } |
7725 | else { | |
a4c04bdc | 7726 | I32 flags = PERL_SCAN_DISALLOW_PREFIX; |
1df70142 | 7727 | STRLEN numlen = 2; |
53305cf1 | 7728 | ender = grok_hex(p, &numlen, &flags, NULL); |
a0ed51b3 LW |
7729 | p += numlen; |
7730 | } | |
9e08bc66 TS |
7731 | if (PL_encoding && ender < 0x100) |
7732 | goto recode_encoding; | |
a687059c | 7733 | break; |
a0d0e21e LW |
7734 | case 'c': |
7735 | p++; | |
f9d13529 | 7736 | ender = grok_bslash_c(*p++, SIZE_ONLY); |
a687059c | 7737 | break; |
a0d0e21e LW |
7738 | case '0': case '1': case '2': case '3':case '4': |
7739 | case '5': case '6': case '7': case '8':case '9': | |
7740 | if (*p == '0' || | |
ca67da41 | 7741 | (isDIGIT(p[1]) && atoi(p) >= RExC_npar)) |
c99e91e9 KW |
7742 | { |
7743 | I32 flags = PERL_SCAN_SILENT_ILLDIGIT; | |
1df70142 | 7744 | STRLEN numlen = 3; |
53305cf1 | 7745 | ender = grok_oct(p, &numlen, &flags, NULL); |
fa1639c5 | 7746 | if (ender > 0xff) { |
62fed28b | 7747 | REQUIRE_UTF8; |
609122bd | 7748 | } |
a0d0e21e LW |
7749 | p += numlen; |
7750 | } | |
7751 | else { | |
7752 | --p; | |
7753 | goto loopdone; | |
a687059c | 7754 | } |
9e08bc66 TS |
7755 | if (PL_encoding && ender < 0x100) |
7756 | goto recode_encoding; | |
7757 | break; | |
7758 | recode_encoding: | |
7759 | { | |
7760 | SV* enc = PL_encoding; | |
7761 | ender = reg_recode((const char)(U8)ender, &enc); | |
668c081a NC |
7762 | if (!enc && SIZE_ONLY) |
7763 | ckWARNreg(p, "Invalid escape in the specified encoding"); | |
62fed28b | 7764 | REQUIRE_UTF8; |
9e08bc66 | 7765 | } |
a687059c | 7766 | break; |
a0d0e21e | 7767 | case '\0': |
830247a4 | 7768 | if (p >= RExC_end) |
b45f050a | 7769 | FAIL("Trailing \\"); |
a687059c | 7770 | /* FALL THROUGH */ |
a0d0e21e | 7771 | default: |
668c081a NC |
7772 | if (!SIZE_ONLY&& isALPHA(*p)) |
7773 | ckWARN2reg(p + 1, "Unrecognized escape \\%c passed through", UCHARAT(p)); | |
a0ed51b3 | 7774 | goto normal_default; |
a0d0e21e LW |
7775 | } |
7776 | break; | |
a687059c | 7777 | default: |
a0ed51b3 | 7778 | normal_default: |
fd400ab9 | 7779 | if (UTF8_IS_START(*p) && UTF) { |
1df70142 | 7780 | STRLEN numlen; |
5e12f4fb | 7781 | ender = utf8n_to_uvchr((U8*)p, RExC_end - p, |
9f7f3913 | 7782 | &numlen, UTF8_ALLOW_DEFAULT); |
a0ed51b3 LW |
7783 | p += numlen; |
7784 | } | |
7785 | else | |
7786 | ender = *p++; | |
a0d0e21e | 7787 | break; |
a687059c | 7788 | } |
bcdf7404 YO |
7789 | if ( RExC_flags & RXf_PMf_EXTENDED) |
7790 | p = regwhite( pRExC_state, p ); | |
60a8b682 JH |
7791 | if (UTF && FOLD) { |
7792 | /* Prime the casefolded buffer. */ | |
ac7e0132 | 7793 | ender = toFOLD_uni(ender, tmpbuf, &foldlen); |
60a8b682 | 7794 | } |
bcdf7404 | 7795 | if (p < RExC_end && ISMULT2(p)) { /* Back off on ?+*. */ |
a0d0e21e LW |
7796 | if (len) |
7797 | p = oldp; | |
16ea2a2e | 7798 | else if (UTF) { |
80aecb99 | 7799 | if (FOLD) { |
60a8b682 | 7800 | /* Emit all the Unicode characters. */ |
1df70142 | 7801 | STRLEN numlen; |
80aecb99 JH |
7802 | for (foldbuf = tmpbuf; |
7803 | foldlen; | |
7804 | foldlen -= numlen) { | |
7805 | ender = utf8_to_uvchr(foldbuf, &numlen); | |
9dc45d57 | 7806 | if (numlen > 0) { |
71207a34 | 7807 | const STRLEN unilen = reguni(pRExC_state, ender, s); |
0ebc6274 JH |
7808 | s += unilen; |
7809 | len += unilen; | |
7810 | /* In EBCDIC the numlen | |
7811 | * and unilen can differ. */ | |
9dc45d57 | 7812 | foldbuf += numlen; |
47654450 JH |
7813 | if (numlen >= foldlen) |
7814 | break; | |
9dc45d57 JH |
7815 | } |
7816 | else | |
7817 | break; /* "Can't happen." */ | |
80aecb99 JH |
7818 | } |
7819 | } | |
7820 | else { | |
71207a34 | 7821 | const STRLEN unilen = reguni(pRExC_state, ender, s); |
9ede7db1 | 7822 | if (unilen > 0) { |
0ebc6274 JH |
7823 | s += unilen; |
7824 | len += unilen; | |
9dc45d57 | 7825 | } |
80aecb99 | 7826 | } |
a0ed51b3 | 7827 | } |
a0d0e21e LW |
7828 | else { |
7829 | len++; | |
eb160463 | 7830 | REGC((char)ender, s++); |
a0d0e21e LW |
7831 | } |
7832 | break; | |
a687059c | 7833 | } |
16ea2a2e | 7834 | if (UTF) { |
80aecb99 | 7835 | if (FOLD) { |
60a8b682 | 7836 | /* Emit all the Unicode characters. */ |
1df70142 | 7837 | STRLEN numlen; |
80aecb99 JH |
7838 | for (foldbuf = tmpbuf; |
7839 | foldlen; | |
7840 | foldlen -= numlen) { | |
7841 | ender = utf8_to_uvchr(foldbuf, &numlen); | |
9dc45d57 | 7842 | if (numlen > 0) { |
71207a34 | 7843 | const STRLEN unilen = reguni(pRExC_state, ender, s); |
0ebc6274 JH |
7844 | len += unilen; |
7845 | s += unilen; | |
7846 | /* In EBCDIC the numlen | |
7847 | * and unilen can differ. */ | |
9dc45d57 | 7848 | foldbuf += numlen; |
47654450 JH |
7849 | if (numlen >= foldlen) |
7850 | break; | |
9dc45d57 JH |
7851 | } |
7852 | else | |
7853 | break; | |
80aecb99 JH |
7854 | } |
7855 | } | |
7856 | else { | |
71207a34 | 7857 | const STRLEN unilen = reguni(pRExC_state, ender, s); |
9ede7db1 | 7858 | if (unilen > 0) { |
0ebc6274 JH |
7859 | s += unilen; |
7860 | len += unilen; | |
9dc45d57 | 7861 | } |
80aecb99 JH |
7862 | } |
7863 | len--; | |
a0ed51b3 LW |
7864 | } |
7865 | else | |
eb160463 | 7866 | REGC((char)ender, s++); |
a0d0e21e LW |
7867 | } |
7868 | loopdone: | |
830247a4 | 7869 | RExC_parse = p - 1; |
fac92740 | 7870 | Set_Node_Cur_Length(ret); /* MJD */ |
830247a4 | 7871 | nextchar(pRExC_state); |
793db0cb JH |
7872 | { |
7873 | /* len is STRLEN which is unsigned, need to copy to signed */ | |
7874 | IV iv = len; | |
7875 | if (iv < 0) | |
7876 | vFAIL("Internal disaster"); | |
7877 | } | |
a0d0e21e LW |
7878 | if (len > 0) |
7879 | *flagp |= HASWIDTH; | |
090f7165 | 7880 | if (len == 1 && UNI_IS_INVARIANT(ender)) |
a0d0e21e | 7881 | *flagp |= SIMPLE; |
3dab1dad | 7882 | |
cd439c50 | 7883 | if (SIZE_ONLY) |
830247a4 | 7884 | RExC_size += STR_SZ(len); |
3dab1dad YO |
7885 | else { |
7886 | STR_LEN(ret) = len; | |
830247a4 | 7887 | RExC_emit += STR_SZ(len); |
07be1b83 | 7888 | } |
3dab1dad | 7889 | } |
a0d0e21e LW |
7890 | break; |
7891 | } | |
a687059c | 7892 | |
a0d0e21e | 7893 | return(ret); |
a687059c LW |
7894 | } |
7895 | ||
873ef191 | 7896 | STATIC char * |
bcdf7404 | 7897 | S_regwhite( RExC_state_t *pRExC_state, char *p ) |
5b5a24f7 | 7898 | { |
bcdf7404 | 7899 | const char *e = RExC_end; |
7918f24d NC |
7900 | |
7901 | PERL_ARGS_ASSERT_REGWHITE; | |
7902 | ||
5b5a24f7 CS |
7903 | while (p < e) { |
7904 | if (isSPACE(*p)) | |
7905 | ++p; | |
7906 | else if (*p == '#') { | |
bcdf7404 | 7907 | bool ended = 0; |
5b5a24f7 | 7908 | do { |
bcdf7404 YO |
7909 | if (*p++ == '\n') { |
7910 | ended = 1; | |
7911 | break; | |
7912 | } | |
7913 | } while (p < e); | |
7914 | if (!ended) | |
7915 | RExC_seen |= REG_SEEN_RUN_ON_COMMENT; | |
5b5a24f7 CS |
7916 | } |
7917 | else | |
7918 | break; | |
7919 | } | |
7920 | return p; | |
7921 | } | |
7922 | ||
b8c5462f JH |
7923 | /* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]]. |
7924 | Character classes ([:foo:]) can also be negated ([:^foo:]). | |
7925 | Returns a named class id (ANYOF_XXX) if successful, -1 otherwise. | |
7926 | Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed, | |
beeb77fc | 7927 | but trigger failures because they are currently unimplemented. */ |
9a86a77b JH |
7928 | |
7929 | #define POSIXCC_DONE(c) ((c) == ':') | |
7930 | #define POSIXCC_NOTYET(c) ((c) == '=' || (c) == '.') | |
7931 | #define POSIXCC(c) (POSIXCC_DONE(c) || POSIXCC_NOTYET(c)) | |
7932 | ||
b8c5462f | 7933 | STATIC I32 |
830247a4 | 7934 | S_regpposixcc(pTHX_ RExC_state_t *pRExC_state, I32 value) |
620e46c5 | 7935 | { |
97aff369 | 7936 | dVAR; |
936ed897 | 7937 | I32 namedclass = OOB_NAMEDCLASS; |
620e46c5 | 7938 | |
7918f24d NC |
7939 | PERL_ARGS_ASSERT_REGPPOSIXCC; |
7940 | ||
830247a4 | 7941 | if (value == '[' && RExC_parse + 1 < RExC_end && |
620e46c5 | 7942 | /* I smell either [: or [= or [. -- POSIX has been here, right? */ |
9a86a77b | 7943 | POSIXCC(UCHARAT(RExC_parse))) { |
1df70142 | 7944 | const char c = UCHARAT(RExC_parse); |
097eb12c | 7945 | char* const s = RExC_parse++; |
b81d288d | 7946 | |
9a86a77b | 7947 | while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != c) |
830247a4 IZ |
7948 | RExC_parse++; |
7949 | if (RExC_parse == RExC_end) | |
620e46c5 | 7950 | /* Grandfather lone [:, [=, [. */ |
830247a4 | 7951 | RExC_parse = s; |
620e46c5 | 7952 | else { |
3dab1dad | 7953 | const char* const t = RExC_parse++; /* skip over the c */ |
80916619 NC |
7954 | assert(*t == c); |
7955 | ||
9a86a77b | 7956 | if (UCHARAT(RExC_parse) == ']') { |
3dab1dad | 7957 | const char *posixcc = s + 1; |
830247a4 | 7958 | RExC_parse++; /* skip over the ending ] */ |
3dab1dad | 7959 | |
b8c5462f | 7960 | if (*s == ':') { |
1df70142 AL |
7961 | const I32 complement = *posixcc == '^' ? *posixcc++ : 0; |
7962 | const I32 skip = t - posixcc; | |
80916619 NC |
7963 | |
7964 | /* Initially switch on the length of the name. */ | |
7965 | switch (skip) { | |
7966 | case 4: | |
3dab1dad YO |
7967 | if (memEQ(posixcc, "word", 4)) /* this is not POSIX, this is the Perl \w */ |
7968 | namedclass = complement ? ANYOF_NALNUM : ANYOF_ALNUM; | |
cc4319de | 7969 | break; |
80916619 NC |
7970 | case 5: |
7971 | /* Names all of length 5. */ | |
7972 | /* alnum alpha ascii blank cntrl digit graph lower | |
7973 | print punct space upper */ | |
7974 | /* Offset 4 gives the best switch position. */ | |
7975 | switch (posixcc[4]) { | |
7976 | case 'a': | |
3dab1dad YO |
7977 | if (memEQ(posixcc, "alph", 4)) /* alpha */ |
7978 | namedclass = complement ? ANYOF_NALPHA : ANYOF_ALPHA; | |
80916619 NC |
7979 | break; |
7980 | case 'e': | |
3dab1dad YO |
7981 | if (memEQ(posixcc, "spac", 4)) /* space */ |
7982 | namedclass = complement ? ANYOF_NPSXSPC : ANYOF_PSXSPC; | |
80916619 NC |
7983 | break; |
7984 | case 'h': | |
3dab1dad YO |
7985 | if (memEQ(posixcc, "grap", 4)) /* graph */ |
7986 | namedclass = complement ? ANYOF_NGRAPH : ANYOF_GRAPH; | |
80916619 NC |
7987 | break; |
7988 | case 'i': | |
3dab1dad YO |
7989 | if (memEQ(posixcc, "asci", 4)) /* ascii */ |
7990 | namedclass = complement ? ANYOF_NASCII : ANYOF_ASCII; | |
80916619 NC |
7991 | break; |
7992 | case 'k': | |
3dab1dad YO |
7993 | if (memEQ(posixcc, "blan", 4)) /* blank */ |
7994 | namedclass = complement ? ANYOF_NBLANK : ANYOF_BLANK; | |
80916619 NC |
7995 | break; |
7996 | case 'l': | |
3dab1dad YO |
7997 | if (memEQ(posixcc, "cntr", 4)) /* cntrl */ |
7998 | namedclass = complement ? ANYOF_NCNTRL : ANYOF_CNTRL; | |
80916619 NC |
7999 | break; |
8000 | case 'm': | |
3dab1dad YO |
8001 | if (memEQ(posixcc, "alnu", 4)) /* alnum */ |
8002 | namedclass = complement ? ANYOF_NALNUMC : ANYOF_ALNUMC; | |
80916619 NC |
8003 | break; |
8004 | case 'r': | |
3dab1dad YO |
8005 | if (memEQ(posixcc, "lowe", 4)) /* lower */ |
8006 | namedclass = complement ? ANYOF_NLOWER : ANYOF_LOWER; | |
8007 | else if (memEQ(posixcc, "uppe", 4)) /* upper */ | |
8008 | namedclass = complement ? ANYOF_NUPPER : ANYOF_UPPER; | |
80916619 NC |
8009 | break; |
8010 | case 't': | |
3dab1dad YO |
8011 | if (memEQ(posixcc, "digi", 4)) /* digit */ |
8012 | namedclass = complement ? ANYOF_NDIGIT : ANYOF_DIGIT; | |
8013 | else if (memEQ(posixcc, "prin", 4)) /* print */ | |
8014 | namedclass = complement ? ANYOF_NPRINT : ANYOF_PRINT; | |
8015 | else if (memEQ(posixcc, "punc", 4)) /* punct */ | |
8016 | namedclass = complement ? ANYOF_NPUNCT : ANYOF_PUNCT; | |
80916619 | 8017 | break; |
b8c5462f JH |
8018 | } |
8019 | break; | |
80916619 | 8020 | case 6: |
3dab1dad YO |
8021 | if (memEQ(posixcc, "xdigit", 6)) |
8022 | namedclass = complement ? ANYOF_NXDIGIT : ANYOF_XDIGIT; | |
b8c5462f JH |
8023 | break; |
8024 | } | |
80916619 NC |
8025 | |
8026 | if (namedclass == OOB_NAMEDCLASS) | |
b45f050a JF |
8027 | Simple_vFAIL3("POSIX class [:%.*s:] unknown", |
8028 | t - s - 1, s + 1); | |
80916619 NC |
8029 | assert (posixcc[skip] == ':'); |
8030 | assert (posixcc[skip+1] == ']'); | |
b45f050a | 8031 | } else if (!SIZE_ONLY) { |
b8c5462f | 8032 | /* [[=foo=]] and [[.foo.]] are still future. */ |
b45f050a | 8033 | |
830247a4 | 8034 | /* adjust RExC_parse so the warning shows after |
b45f050a | 8035 | the class closes */ |
9a86a77b | 8036 | while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse) != ']') |
830247a4 | 8037 | RExC_parse++; |
b45f050a JF |
8038 | Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c); |
8039 | } | |
b8c5462f JH |
8040 | } else { |
8041 | /* Maternal grandfather: | |
8042 | * "[:" ending in ":" but not in ":]" */ | |
830247a4 | 8043 | RExC_parse = s; |
767d463e | 8044 | } |
620e46c5 JH |
8045 | } |
8046 | } | |
8047 | ||
b8c5462f JH |
8048 | return namedclass; |
8049 | } | |
8050 | ||
8051 | STATIC void | |
830247a4 | 8052 | S_checkposixcc(pTHX_ RExC_state_t *pRExC_state) |
b8c5462f | 8053 | { |
97aff369 | 8054 | dVAR; |
7918f24d NC |
8055 | |
8056 | PERL_ARGS_ASSERT_CHECKPOSIXCC; | |
8057 | ||
3dab1dad | 8058 | if (POSIXCC(UCHARAT(RExC_parse))) { |
1df70142 AL |
8059 | const char *s = RExC_parse; |
8060 | const char c = *s++; | |
b8c5462f | 8061 | |
3dab1dad | 8062 | while (isALNUM(*s)) |
b8c5462f JH |
8063 | s++; |
8064 | if (*s && c == *s && s[1] == ']') { | |
668c081a NC |
8065 | ckWARN3reg(s+2, |
8066 | "POSIX syntax [%c %c] belongs inside character classes", | |
8067 | c, c); | |
b45f050a JF |
8068 | |
8069 | /* [[=foo=]] and [[.foo.]] are still future. */ | |
9a86a77b | 8070 | if (POSIXCC_NOTYET(c)) { |
830247a4 | 8071 | /* adjust RExC_parse so the error shows after |
b45f050a | 8072 | the class closes */ |
9a86a77b | 8073 | while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse++) != ']') |
3dab1dad | 8074 | NOOP; |
b45f050a JF |
8075 | Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c); |
8076 | } | |
b8c5462f JH |
8077 | } |
8078 | } | |
620e46c5 JH |
8079 | } |
8080 | ||
0399b215 | 8081 | /* No locale test */ |
e1d1eefb YO |
8082 | #define _C_C_T_NOLOC_(NAME,TEST,WORD) \ |
8083 | ANYOF_##NAME: \ | |
8084 | for (value = 0; value < 256; value++) \ | |
8085 | if (TEST) \ | |
2283d326 | 8086 | stored += S_set_regclass_bit(aTHX_ pRExC_state, ret, value); \ |
e1d1eefb YO |
8087 | yesno = '+'; \ |
8088 | what = WORD; \ | |
8089 | break; \ | |
8090 | case ANYOF_N##NAME: \ | |
8091 | for (value = 0; value < 256; value++) \ | |
8092 | if (!TEST) \ | |
2283d326 | 8093 | stored += S_set_regclass_bit(aTHX_ pRExC_state, ret, value); \ |
e1d1eefb YO |
8094 | yesno = '!'; \ |
8095 | what = WORD; \ | |
8096 | break | |
89836f1f | 8097 | |
a12cf05f KW |
8098 | /* Like the above, but there are differences if we are in uni-8-bit or not, so |
8099 | * there are two tests passed in, to use depending on that. There aren't any | |
8100 | * cases where the label is different from the name, so no need for that | |
8101 | * parameter */ | |
0399b215 | 8102 | #define _C_C_T_(NAME,TEST_8,TEST_7,WORD) \ |
a12cf05f KW |
8103 | ANYOF_##NAME: \ |
8104 | if (LOC) ANYOF_CLASS_SET(ret, ANYOF_##NAME); \ | |
8105 | else if (UNI_SEMANTICS) { \ | |
8106 | for (value = 0; value < 256; value++) { \ | |
2283d326 KW |
8107 | if (TEST_8) stored += \ |
8108 | S_set_regclass_bit(aTHX_ pRExC_state, ret, value); \ | |
a12cf05f KW |
8109 | } \ |
8110 | } \ | |
8111 | else { \ | |
8112 | for (value = 0; value < 256; value++) { \ | |
2283d326 KW |
8113 | if (TEST_7) stored += \ |
8114 | S_set_regclass_bit(aTHX_ pRExC_state, ret, value); \ | |
a12cf05f KW |
8115 | } \ |
8116 | } \ | |
8117 | yesno = '+'; \ | |
8118 | what = WORD; \ | |
8119 | break; \ | |
8120 | case ANYOF_N##NAME: \ | |
8121 | if (LOC) ANYOF_CLASS_SET(ret, ANYOF_N##NAME); \ | |
8122 | else if (UNI_SEMANTICS) { \ | |
8123 | for (value = 0; value < 256; value++) { \ | |
2283d326 KW |
8124 | if (! TEST_8) stored += \ |
8125 | S_set_regclass_bit(aTHX_ pRExC_state, ret, value); \ | |
a12cf05f KW |
8126 | } \ |
8127 | } \ | |
8128 | else { \ | |
8129 | for (value = 0; value < 256; value++) { \ | |
2283d326 KW |
8130 | if (! TEST_7) stored += \ |
8131 | S_set_regclass_bit(aTHX_ pRExC_state, ret, value); \ | |
a12cf05f KW |
8132 | } \ |
8133 | } \ | |
8134 | yesno = '!'; \ | |
8135 | what = WORD; \ | |
8136 | break | |
8137 | ||
da7fcca4 YO |
8138 | /* |
8139 | We dont use PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS as the direct test | |
8140 | so that it is possible to override the option here without having to | |
8141 | rebuild the entire core. as we are required to do if we change regcomp.h | |
8142 | which is where PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS is defined. | |
8143 | */ | |
8144 | #if PERL_LEGACY_UNICODE_CHARCLASS_MAPPINGS | |
8145 | #define BROKEN_UNICODE_CHARCLASS_MAPPINGS | |
8146 | #endif | |
8147 | ||
8148 | #ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS | |
8149 | #define POSIX_CC_UNI_NAME(CCNAME) CCNAME | |
8150 | #else | |
8151 | #define POSIX_CC_UNI_NAME(CCNAME) "Posix" CCNAME | |
8152 | #endif | |
8153 | ||
2283d326 KW |
8154 | STATIC U8 |
8155 | S_set_regclass_bit_fold(pTHX_ RExC_state_t *pRExC_state, regnode* node, const U8 value) | |
8156 | { | |
8157 | ||
8158 | /* Handle the setting of folds in the bitmap for non-locale ANYOF nodes. | |
8159 | * Locale folding is done at run-time, so this function should not be | |
8160 | * called for nodes that are for locales. | |
8161 | * | |
8162 | * This function simply sets the bit corresponding to the fold of the input | |
8163 | * 'value', if not already set. The fold of 'f' is 'F', and the fold of | |
8164 | * 'F' is 'f'. | |
8165 | * | |
8166 | * It also sets any necessary flags, and returns the number of bits that | |
8167 | * actually changed from 0 to 1 */ | |
8168 | ||
8169 | U8 stored = 0; | |
8170 | SV *sv; | |
8171 | U8 fold; | |
8172 | ||
8173 | fold = (UNI_SEMANTICS) ? PL_fold_latin1[value] | |
8174 | : PL_fold[value]; | |
8175 | ||
8176 | /* It assumes the bit for 'value' has already been set */ | |
8177 | if (fold != value && ! ANYOF_BITMAP_TEST(node, fold)) { | |
8178 | ANYOF_BITMAP_SET(node, fold); | |
8179 | stored++; | |
8180 | } | |
8181 | ||
8182 | /* The fold of the German sharp s is two ASCII characters, so isn't in the | |
8183 | * bitmap and doesn't have to be in utf8, but we only process it if unicode | |
8184 | * semantics are called for */ | |
8185 | if (UNI_SEMANTICS && value == LATIN_SMALL_LETTER_SHARP_S) { | |
8186 | ANYOF_FLAGS(node) |= ANYOF_NONBITMAP_NON_UTF8; | |
8187 | } | |
8188 | else if (_NONLATIN1_FOLD_CLOSURE_ONLY_FOR_USE_BY_REGCOMP_DOT_C(value) | |
8189 | || (! UNI_SEMANTICS | |
8190 | && ! isASCII(value) | |
8191 | && PL_fold_latin1[value] != value)) | |
8192 | { /* A character that has a fold outside of Latin1 matches outside the | |
8193 | bitmap, but only when the target string is utf8. Similarly when we | |
8194 | don't have unicode semantics for the above ASCII Latin-1 characters, | |
8195 | and they have a fold, they should match if the target is utf8, and | |
8196 | not otherwise */ | |
8197 | ANYOF_FLAGS(node) |= ANYOF_UTF8; | |
8198 | } | |
8199 | ||
8200 | return stored; | |
8201 | } | |
8202 | ||
8203 | ||
8204 | PERL_STATIC_INLINE U8 | |
8205 | S_set_regclass_bit(pTHX_ RExC_state_t *pRExC_state, regnode* node, const U32 value) | |
8206 | { | |
8207 | /* This inline function sets a bit in the bitmap if not already set, and if | |
8208 | * appropriate, its fold, returning the number of bits that actually | |
8209 | * changed from 0 to 1 */ | |
8210 | ||
8211 | U8 stored; | |
8212 | ||
8213 | if (ANYOF_BITMAP_TEST(node, value)) { /* Already set */ | |
8214 | return 0; | |
8215 | } | |
8216 | ||
8217 | ANYOF_BITMAP_SET(node, value); | |
8218 | stored = 1; | |
8219 | ||
8220 | if (FOLD && ! LOC) { /* Locale folds aren't known until runtime */ | |
8221 | stored += S_set_regclass_bit_fold(aTHX_ pRExC_state, node, value); | |
8222 | } | |
8223 | ||
8224 | return stored; | |
8225 | } | |
8226 | ||
7f6f358c YO |
8227 | /* |
8228 | parse a class specification and produce either an ANYOF node that | |
89836f1f YO |
8229 | matches the pattern or if the pattern matches a single char only and |
8230 | that char is < 256 and we are case insensitive then we produce an | |
8231 | EXACT node instead. | |
7f6f358c | 8232 | */ |
89836f1f | 8233 | |
76e3520e | 8234 | STATIC regnode * |
3dab1dad | 8235 | S_regclass(pTHX_ RExC_state_t *pRExC_state, U32 depth) |
a687059c | 8236 | { |
97aff369 | 8237 | dVAR; |
9a86a77b | 8238 | register UV nextvalue; |
3568d838 | 8239 | register IV prevvalue = OOB_UNICODE; |
ffc61ed2 | 8240 | register IV range = 0; |
e1d1eefb | 8241 | UV value = 0; /* XXX:dmq: needs to be referenceable (unfortunately) */ |
c277df42 | 8242 | register regnode *ret; |
ba210ebe | 8243 | STRLEN numlen; |
ffc61ed2 | 8244 | IV namedclass; |
cbbf8932 | 8245 | char *rangebegin = NULL; |
936ed897 | 8246 | bool need_class = 0; |
c445ea15 | 8247 | SV *listsv = NULL; |
ffc61ed2 | 8248 | UV n; |
9e55ce06 | 8249 | bool optimize_invert = TRUE; |
cbbf8932 | 8250 | AV* unicode_alternate = NULL; |
1b2d223b JH |
8251 | #ifdef EBCDIC |
8252 | UV literal_endpoint = 0; | |
8253 | #endif | |
2c63ecad | 8254 | UV stored = 0; /* 0, 1, or more than 1 chars stored in the class */ |
ffc61ed2 | 8255 | |
3dab1dad | 8256 | regnode * const orig_emit = RExC_emit; /* Save the original RExC_emit in |
7f6f358c | 8257 | case we need to change the emitted regop to an EXACT. */ |
07be1b83 | 8258 | const char * orig_parse = RExC_parse; |
72f13be8 | 8259 | GET_RE_DEBUG_FLAGS_DECL; |
7918f24d NC |
8260 | |
8261 | PERL_ARGS_ASSERT_REGCLASS; | |
76e84362 SH |
8262 | #ifndef DEBUGGING |
8263 | PERL_UNUSED_ARG(depth); | |
8264 | #endif | |
72f13be8 | 8265 | |
3dab1dad | 8266 | DEBUG_PARSE("clas"); |
7f6f358c YO |
8267 | |
8268 | /* Assume we are going to generate an ANYOF node. */ | |
ffc61ed2 JH |
8269 | ret = reganode(pRExC_state, ANYOF, 0); |
8270 | ||
8271 | if (!SIZE_ONLY) | |
8272 | ANYOF_FLAGS(ret) = 0; | |
8273 | ||
9a86a77b | 8274 | if (UCHARAT(RExC_parse) == '^') { /* Complement of range. */ |
ffc61ed2 JH |
8275 | RExC_naughty++; |
8276 | RExC_parse++; | |
8277 | if (!SIZE_ONLY) | |
8278 | ANYOF_FLAGS(ret) |= ANYOF_INVERT; | |
8279 | } | |
a0d0e21e | 8280 | |
73060fc4 | 8281 | if (SIZE_ONLY) { |
830247a4 | 8282 | RExC_size += ANYOF_SKIP; |
73060fc4 JH |
8283 | listsv = &PL_sv_undef; /* For code scanners: listsv always non-NULL. */ |
8284 | } | |
936ed897 | 8285 | else { |
830247a4 | 8286 | RExC_emit += ANYOF_SKIP; |
936ed897 IZ |
8287 | if (FOLD) |
8288 | ANYOF_FLAGS(ret) |= ANYOF_FOLD; | |
8289 | if (LOC) | |
8290 | ANYOF_FLAGS(ret) |= ANYOF_LOCALE; | |
ffc61ed2 | 8291 | ANYOF_BITMAP_ZERO(ret); |
396482e1 | 8292 | listsv = newSVpvs("# comment\n"); |
a0d0e21e | 8293 | } |
b8c5462f | 8294 | |
9a86a77b JH |
8295 | nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0; |
8296 | ||
b938889d | 8297 | if (!SIZE_ONLY && POSIXCC(nextvalue)) |
830247a4 | 8298 | checkposixcc(pRExC_state); |
b8c5462f | 8299 | |
f064b6ad HS |
8300 | /* allow 1st char to be ] (allowing it to be - is dealt with later) */ |
8301 | if (UCHARAT(RExC_parse) == ']') | |
8302 | goto charclassloop; | |
ffc61ed2 | 8303 | |
fc8cd66c | 8304 | parseit: |
9a86a77b | 8305 | while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != ']') { |
ffc61ed2 JH |
8306 | |
8307 | charclassloop: | |
8308 | ||
8309 | namedclass = OOB_NAMEDCLASS; /* initialize as illegal */ | |
8310 | ||
73b437c8 | 8311 | if (!range) |
830247a4 | 8312 | rangebegin = RExC_parse; |
ffc61ed2 | 8313 | if (UTF) { |
5e12f4fb | 8314 | value = utf8n_to_uvchr((U8*)RExC_parse, |
3568d838 | 8315 | RExC_end - RExC_parse, |
9f7f3913 | 8316 | &numlen, UTF8_ALLOW_DEFAULT); |
ffc61ed2 JH |
8317 | RExC_parse += numlen; |
8318 | } | |
8319 | else | |
8320 | value = UCHARAT(RExC_parse++); | |
7f6f358c | 8321 | |
9a86a77b JH |
8322 | nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0; |
8323 | if (value == '[' && POSIXCC(nextvalue)) | |
830247a4 | 8324 | namedclass = regpposixcc(pRExC_state, value); |
620e46c5 | 8325 | else if (value == '\\') { |
ffc61ed2 | 8326 | if (UTF) { |
5e12f4fb | 8327 | value = utf8n_to_uvchr((U8*)RExC_parse, |
ffc61ed2 | 8328 | RExC_end - RExC_parse, |
9f7f3913 | 8329 | &numlen, UTF8_ALLOW_DEFAULT); |
ffc61ed2 JH |
8330 | RExC_parse += numlen; |
8331 | } | |
8332 | else | |
8333 | value = UCHARAT(RExC_parse++); | |
470c3474 | 8334 | /* Some compilers cannot handle switching on 64-bit integer |
ffc61ed2 | 8335 | * values, therefore value cannot be an UV. Yes, this will |
e2962f66 JH |
8336 | * be a problem later if we want switch on Unicode. |
8337 | * A similar issue a little bit later when switching on | |
8338 | * namedclass. --jhi */ | |
ffc61ed2 | 8339 | switch ((I32)value) { |
b8c5462f JH |
8340 | case 'w': namedclass = ANYOF_ALNUM; break; |
8341 | case 'W': namedclass = ANYOF_NALNUM; break; | |
8342 | case 's': namedclass = ANYOF_SPACE; break; | |
8343 | case 'S': namedclass = ANYOF_NSPACE; break; | |
8344 | case 'd': namedclass = ANYOF_DIGIT; break; | |
8345 | case 'D': namedclass = ANYOF_NDIGIT; break; | |
e1d1eefb YO |
8346 | case 'v': namedclass = ANYOF_VERTWS; break; |
8347 | case 'V': namedclass = ANYOF_NVERTWS; break; | |
8348 | case 'h': namedclass = ANYOF_HORIZWS; break; | |
8349 | case 'H': namedclass = ANYOF_NHORIZWS; break; | |
fc8cd66c YO |
8350 | case 'N': /* Handle \N{NAME} in class */ |
8351 | { | |
8352 | /* We only pay attention to the first char of | |
8353 | multichar strings being returned. I kinda wonder | |
8354 | if this makes sense as it does change the behaviour | |
8355 | from earlier versions, OTOH that behaviour was broken | |
8356 | as well. */ | |
8357 | UV v; /* value is register so we cant & it /grrr */ | |
afefe6bf | 8358 | if (reg_namedseq(pRExC_state, &v, NULL)) { |
fc8cd66c YO |
8359 | goto parseit; |
8360 | } | |
8361 | value= v; | |
8362 | } | |
8363 | break; | |
ffc61ed2 JH |
8364 | case 'p': |
8365 | case 'P': | |
3dab1dad YO |
8366 | { |
8367 | char *e; | |
af6f566e | 8368 | if (RExC_parse >= RExC_end) |
2a4859cd | 8369 | vFAIL2("Empty \\%c{}", (U8)value); |
ffc61ed2 | 8370 | if (*RExC_parse == '{') { |
1df70142 | 8371 | const U8 c = (U8)value; |
ffc61ed2 JH |
8372 | e = strchr(RExC_parse++, '}'); |
8373 | if (!e) | |
0da60cf5 | 8374 | vFAIL2("Missing right brace on \\%c{}", c); |
ab13f0c7 JH |
8375 | while (isSPACE(UCHARAT(RExC_parse))) |
8376 | RExC_parse++; | |
8377 | if (e == RExC_parse) | |
0da60cf5 | 8378 | vFAIL2("Empty \\%c{}", c); |
ffc61ed2 | 8379 | n = e - RExC_parse; |
ab13f0c7 JH |
8380 | while (isSPACE(UCHARAT(RExC_parse + n - 1))) |
8381 | n--; | |
ffc61ed2 JH |
8382 | } |
8383 | else { | |
8384 | e = RExC_parse; | |
8385 | n = 1; | |
8386 | } | |
8387 | if (!SIZE_ONLY) { | |
ab13f0c7 JH |
8388 | if (UCHARAT(RExC_parse) == '^') { |
8389 | RExC_parse++; | |
8390 | n--; | |
8391 | value = value == 'p' ? 'P' : 'p'; /* toggle */ | |
8392 | while (isSPACE(UCHARAT(RExC_parse))) { | |
8393 | RExC_parse++; | |
8394 | n--; | |
8395 | } | |
8396 | } | |
097eb12c AL |
8397 | Perl_sv_catpvf(aTHX_ listsv, "%cutf8::%.*s\n", |
8398 | (value=='p' ? '+' : '!'), (int)n, RExC_parse); | |
ffc61ed2 JH |
8399 | } |
8400 | RExC_parse = e + 1; | |
08fc12dd KW |
8401 | |
8402 | /* The \p could match something in the Latin1 range, hence | |
8403 | * something that isn't utf8 */ | |
3ff7ceb3 | 8404 | ANYOF_FLAGS(ret) |= ANYOF_NONBITMAP; |
f81125e2 | 8405 | namedclass = ANYOF_MAX; /* no official name, but it's named */ |
3dab1dad | 8406 | } |
f81125e2 | 8407 | break; |
b8c5462f JH |
8408 | case 'n': value = '\n'; break; |
8409 | case 'r': value = '\r'; break; | |
8410 | case 't': value = '\t'; break; | |
8411 | case 'f': value = '\f'; break; | |
8412 | case 'b': value = '\b'; break; | |
c7f1f016 NIS |
8413 | case 'e': value = ASCII_TO_NATIVE('\033');break; |
8414 | case 'a': value = ASCII_TO_NATIVE('\007');break; | |
f0a2b745 KW |
8415 | case 'o': |
8416 | RExC_parse--; /* function expects to be pointed at the 'o' */ | |
454155d9 KW |
8417 | { |
8418 | const char* error_msg; | |
8419 | bool valid = grok_bslash_o(RExC_parse, | |
f0a2b745 KW |
8420 | &value, |
8421 | &numlen, | |
454155d9 KW |
8422 | &error_msg, |
8423 | SIZE_ONLY); | |
8424 | RExC_parse += numlen; | |
8425 | if (! valid) { | |
8426 | vFAIL(error_msg); | |
8427 | } | |
f0a2b745 | 8428 | } |
f0a2b745 KW |
8429 | if (PL_encoding && value < 0x100) { |
8430 | goto recode_encoding; | |
8431 | } | |
8432 | break; | |
b8c5462f | 8433 | case 'x': |
ffc61ed2 | 8434 | if (*RExC_parse == '{') { |
a4c04bdc NC |
8435 | I32 flags = PERL_SCAN_ALLOW_UNDERSCORES |
8436 | | PERL_SCAN_DISALLOW_PREFIX; | |
3dab1dad | 8437 | char * const e = strchr(RExC_parse++, '}'); |
b81d288d | 8438 | if (!e) |
ffc61ed2 | 8439 | vFAIL("Missing right brace on \\x{}"); |
53305cf1 NC |
8440 | |
8441 | numlen = e - RExC_parse; | |
8442 | value = grok_hex(RExC_parse, &numlen, &flags, NULL); | |
ffc61ed2 JH |
8443 | RExC_parse = e + 1; |
8444 | } | |
8445 | else { | |
a4c04bdc | 8446 | I32 flags = PERL_SCAN_DISALLOW_PREFIX; |
53305cf1 NC |
8447 | numlen = 2; |
8448 | value = grok_hex(RExC_parse, &numlen, &flags, NULL); | |
ffc61ed2 JH |
8449 | RExC_parse += numlen; |
8450 | } | |
9e08bc66 TS |
8451 | if (PL_encoding && value < 0x100) |
8452 | goto recode_encoding; | |
b8c5462f JH |
8453 | break; |
8454 | case 'c': | |
f9d13529 | 8455 | value = grok_bslash_c(*RExC_parse++, SIZE_ONLY); |
b8c5462f JH |
8456 | break; |
8457 | case '0': case '1': case '2': case '3': case '4': | |
c99e91e9 | 8458 | case '5': case '6': case '7': |
9e08bc66 | 8459 | { |
c99e91e9 KW |
8460 | /* Take 1-3 octal digits */ |
8461 | I32 flags = PERL_SCAN_SILENT_ILLDIGIT; | |
9e08bc66 TS |
8462 | numlen = 3; |
8463 | value = grok_oct(--RExC_parse, &numlen, &flags, NULL); | |
8464 | RExC_parse += numlen; | |
8465 | if (PL_encoding && value < 0x100) | |
8466 | goto recode_encoding; | |
8467 | break; | |
8468 | } | |
8469 | recode_encoding: | |
8470 | { | |
8471 | SV* enc = PL_encoding; | |
8472 | value = reg_recode((const char)(U8)value, &enc); | |
668c081a NC |
8473 | if (!enc && SIZE_ONLY) |
8474 | ckWARNreg(RExC_parse, | |
8475 | "Invalid escape in the specified encoding"); | |
9e08bc66 TS |
8476 | break; |
8477 | } | |
1028017a | 8478 | default: |
c99e91e9 KW |
8479 | /* Allow \_ to not give an error */ |
8480 | if (!SIZE_ONLY && isALNUM(value) && value != '_') { | |
668c081a NC |
8481 | ckWARN2reg(RExC_parse, |
8482 | "Unrecognized escape \\%c in character class passed through", | |
8483 | (int)value); | |
c99e91e9 | 8484 | } |
1028017a | 8485 | break; |
b8c5462f | 8486 | } |
ffc61ed2 | 8487 | } /* end of \blah */ |
1b2d223b JH |
8488 | #ifdef EBCDIC |
8489 | else | |
8490 | literal_endpoint++; | |
8491 | #endif | |
ffc61ed2 JH |
8492 | |
8493 | if (namedclass > OOB_NAMEDCLASS) { /* this is a named class \blah */ | |
8494 | ||
2c63ecad KW |
8495 | /* What matches in a locale is not known until runtime, so need to |
8496 | * (one time per class) allocate extra space to pass to regexec. | |
8497 | * The space will contain a bit for each named class that is to be | |
8498 | * matched against. This isn't needed for \p{} and pseudo-classes, | |
8499 | * as they are not affected by locale, and hence are dealt with | |
8500 | * separately */ | |
8501 | if (LOC && namedclass < ANYOF_MAX && ! need_class) { | |
8502 | need_class = 1; | |
8503 | if (SIZE_ONLY) { | |
8504 | RExC_size += ANYOF_CLASS_ADD_SKIP; | |
8505 | } | |
8506 | else { | |
8507 | RExC_emit += ANYOF_CLASS_ADD_SKIP; | |
8508 | ANYOF_CLASS_ZERO(ret); | |
8509 | } | |
9051cfd9 | 8510 | ANYOF_FLAGS(ret) |= ANYOF_CLASS; |
2c63ecad | 8511 | } |
ffc61ed2 JH |
8512 | |
8513 | /* a bad range like a-\d, a-[:digit:] ? */ | |
8514 | if (range) { | |
73b437c8 | 8515 | if (!SIZE_ONLY) { |
668c081a NC |
8516 | const int w = |
8517 | RExC_parse >= rangebegin ? | |
8518 | RExC_parse - rangebegin : 0; | |
8519 | ckWARN4reg(RExC_parse, | |
b45f050a | 8520 | "False [] range \"%*.*s\"", |
097eb12c | 8521 | w, w, rangebegin); |
668c081a | 8522 | |
3568d838 | 8523 | if (prevvalue < 256) { |
2283d326 KW |
8524 | stored += |
8525 | S_set_regclass_bit(aTHX_ pRExC_state, ret, prevvalue); | |
8526 | stored += | |
8527 | S_set_regclass_bit(aTHX_ pRExC_state, ret, '-'); | |
ffc61ed2 JH |
8528 | } |
8529 | else { | |
ef87b810 | 8530 | ANYOF_FLAGS(ret) |= ANYOF_UTF8; |
ffc61ed2 | 8531 | Perl_sv_catpvf(aTHX_ listsv, |
3568d838 | 8532 | "%04"UVxf"\n%04"UVxf"\n", (UV)prevvalue, (UV) '-'); |
ffc61ed2 | 8533 | } |
b8c5462f | 8534 | } |
ffc61ed2 JH |
8535 | |
8536 | range = 0; /* this was not a true range */ | |
73b437c8 | 8537 | } |
ffc61ed2 | 8538 | |
89836f1f YO |
8539 | |
8540 | ||
73b437c8 | 8541 | if (!SIZE_ONLY) { |
c49a72a9 NC |
8542 | const char *what = NULL; |
8543 | char yesno = 0; | |
8544 | ||
3568d838 JH |
8545 | if (namedclass > OOB_NAMEDCLASS) |
8546 | optimize_invert = FALSE; | |
e2962f66 JH |
8547 | /* Possible truncation here but in some 64-bit environments |
8548 | * the compiler gets heartburn about switch on 64-bit values. | |
8549 | * A similar issue a little earlier when switching on value. | |
98f323fa | 8550 | * --jhi */ |
e2962f66 | 8551 | switch ((I32)namedclass) { |
da7fcca4 | 8552 | |
0399b215 KW |
8553 | case _C_C_T_(ALNUMC, isALNUMC_L1(value), isALNUMC(value), "XPosixAlnum"); |
8554 | case _C_C_T_(ALPHA, isALPHA_L1(value), isALPHA(value), "XPosixAlpha"); | |
8555 | case _C_C_T_(BLANK, isBLANK_L1(value), isBLANK(value), "XPosixBlank"); | |
8556 | case _C_C_T_(CNTRL, isCNTRL_L1(value), isCNTRL(value), "XPosixCntrl"); | |
8557 | case _C_C_T_(GRAPH, isGRAPH_L1(value), isGRAPH(value), "XPosixGraph"); | |
8558 | case _C_C_T_(LOWER, isLOWER_L1(value), isLOWER(value), "XPosixLower"); | |
8559 | case _C_C_T_(PRINT, isPRINT_L1(value), isPRINT(value), "XPosixPrint"); | |
8560 | case _C_C_T_(PSXSPC, isPSXSPC_L1(value), isPSXSPC(value), "XPosixSpace"); | |
8561 | case _C_C_T_(PUNCT, isPUNCT_L1(value), isPUNCT(value), "XPosixPunct"); | |
8562 | case _C_C_T_(UPPER, isUPPER_L1(value), isUPPER(value), "XPosixUpper"); | |
da7fcca4 | 8563 | #ifdef BROKEN_UNICODE_CHARCLASS_MAPPINGS |
a12cf05f | 8564 | /* \s, \w match all unicode if utf8. */ |
0399b215 KW |
8565 | case _C_C_T_(SPACE, isSPACE_L1(value), isSPACE(value), "SpacePerl"); |
8566 | case _C_C_T_(ALNUM, isWORDCHAR_L1(value), isALNUM(value), "Word"); | |
da7fcca4 | 8567 | #else |
a12cf05f | 8568 | /* \s, \w match ascii and locale only */ |
0399b215 KW |
8569 | case _C_C_T_(SPACE, isSPACE_L1(value), isSPACE(value), "PerlSpace"); |
8570 | case _C_C_T_(ALNUM, isWORDCHAR_L1(value), isALNUM(value), "PerlWord"); | |
da7fcca4 | 8571 | #endif |
0399b215 | 8572 | case _C_C_T_(XDIGIT, isXDIGIT_L1(value), isXDIGIT(value), "XPosixXDigit"); |
e1d1eefb YO |
8573 | case _C_C_T_NOLOC_(VERTWS, is_VERTWS_latin1(&value), "VertSpace"); |
8574 | case _C_C_T_NOLOC_(HORIZWS, is_HORIZWS_latin1(&value), "HorizSpace"); | |
73b437c8 JH |
8575 | case ANYOF_ASCII: |
8576 | if (LOC) | |
936ed897 | 8577 | ANYOF_CLASS_SET(ret, ANYOF_ASCII); |
73b437c8 | 8578 | else { |
c7f1f016 | 8579 | #ifndef EBCDIC |
1ba5c669 | 8580 | for (value = 0; value < 128; value++) |
2283d326 KW |
8581 | stored += |
8582 | S_set_regclass_bit(aTHX_ pRExC_state, ret, value); | |
1ba5c669 | 8583 | #else /* EBCDIC */ |
ffbc6a93 | 8584 | for (value = 0; value < 256; value++) { |
3a3c4447 | 8585 | if (isASCII(value)) |
2283d326 | 8586 | stored += S_set_regclass_bit(aTHX_ pRExC_state, ret, value); |
ffbc6a93 | 8587 | } |
1ba5c669 | 8588 | #endif /* EBCDIC */ |
73b437c8 | 8589 | } |
c49a72a9 NC |
8590 | yesno = '+'; |
8591 | what = "ASCII"; | |
73b437c8 JH |
8592 | break; |
8593 | case ANYOF_NASCII: | |
8594 | if (LOC) | |
936ed897 | 8595 | ANYOF_CLASS_SET(ret, ANYOF_NASCII); |
73b437c8 | 8596 | else { |
c7f1f016 | 8597 | #ifndef EBCDIC |
1ba5c669 | 8598 | for (value = 128; value < 256; value++) |
2283d326 KW |
8599 | stored += |
8600 | S_set_regclass_bit(aTHX_ pRExC_state, ret, value); | |
1ba5c669 | 8601 | #else /* EBCDIC */ |
ffbc6a93 | 8602 | for (value = 0; value < 256; value++) { |
3a3c4447 | 8603 | if (!isASCII(value)) |
2283d326 | 8604 | stored += S_set_regclass_bit(aTHX_ pRExC_state, ret, value); |
ffbc6a93 | 8605 | } |
1ba5c669 | 8606 | #endif /* EBCDIC */ |
73b437c8 | 8607 | } |
c49a72a9 NC |
8608 | yesno = '!'; |
8609 | what = "ASCII"; | |
89836f1f | 8610 | break; |
ffc61ed2 JH |
8611 | case ANYOF_DIGIT: |
8612 | if (LOC) | |
8613 | ANYOF_CLASS_SET(ret, ANYOF_DIGIT); | |
8614 | else { | |
8615 | /* consecutive digits assumed */ | |
8616 | for (value = '0'; value <= '9'; value++) | |
2283d326 KW |
8617 | stored += |
8618 | S_set_regclass_bit(aTHX_ pRExC_state, ret, value); | |
ffc61ed2 | 8619 | } |
c49a72a9 | 8620 | yesno = '+'; |
da7fcca4 | 8621 | what = POSIX_CC_UNI_NAME("Digit"); |
ffc61ed2 JH |
8622 | break; |
8623 | case ANYOF_NDIGIT: | |
8624 | if (LOC) | |
8625 | ANYOF_CLASS_SET(ret, ANYOF_NDIGIT); | |
8626 | else { | |
8627 | /* consecutive digits assumed */ | |
8628 | for (value = 0; value < '0'; value++) | |
2283d326 KW |
8629 | stored += |
8630 | S_set_regclass_bit(aTHX_ pRExC_state, ret, value); | |
ffc61ed2 | 8631 | for (value = '9' + 1; value < 256; value++) |
2283d326 KW |
8632 | stored += |
8633 | S_set_regclass_bit(aTHX_ pRExC_state, ret, value); | |
ffc61ed2 | 8634 | } |
c49a72a9 | 8635 | yesno = '!'; |
da7fcca4 | 8636 | what = POSIX_CC_UNI_NAME("Digit"); |
89836f1f | 8637 | break; |
f81125e2 JP |
8638 | case ANYOF_MAX: |
8639 | /* this is to handle \p and \P */ | |
8640 | break; | |
73b437c8 | 8641 | default: |
b45f050a | 8642 | vFAIL("Invalid [::] class"); |
73b437c8 | 8643 | break; |
b8c5462f | 8644 | } |
c49a72a9 NC |
8645 | if (what) { |
8646 | /* Strings such as "+utf8::isWord\n" */ | |
8647 | Perl_sv_catpvf(aTHX_ listsv, "%cutf8::Is%s\n", yesno, what); | |
8648 | } | |
2c63ecad | 8649 | stored+=2; /* can't optimize this class */ |
ef87b810 KW |
8650 | |
8651 | /* All but ASCII can match Unicode characters, but all the ones | |
8652 | * that aren't in utf8 are in the bitmap */ | |
8653 | if (namedclass != ANYOF_ASCII) { | |
8654 | ANYOF_FLAGS(ret) |= ANYOF_UTF8; | |
8655 | } | |
73b437c8 | 8656 | continue; |
a0d0e21e | 8657 | } |
ffc61ed2 JH |
8658 | } /* end of namedclass \blah */ |
8659 | ||
a0d0e21e | 8660 | if (range) { |
eb160463 | 8661 | if (prevvalue > (IV)value) /* b-a */ { |
d4c19fe8 AL |
8662 | const int w = RExC_parse - rangebegin; |
8663 | Simple_vFAIL4("Invalid [] range \"%*.*s\"", w, w, rangebegin); | |
3568d838 | 8664 | range = 0; /* not a valid range */ |
73b437c8 | 8665 | } |
a0d0e21e LW |
8666 | } |
8667 | else { | |
3568d838 | 8668 | prevvalue = value; /* save the beginning of the range */ |
830247a4 IZ |
8669 | if (*RExC_parse == '-' && RExC_parse+1 < RExC_end && |
8670 | RExC_parse[1] != ']') { | |
8671 | RExC_parse++; | |
ffc61ed2 JH |
8672 | |
8673 | /* a bad range like \w-, [:word:]- ? */ | |
8674 | if (namedclass > OOB_NAMEDCLASS) { | |
afd78fd5 | 8675 | if (ckWARN(WARN_REGEXP)) { |
d4c19fe8 | 8676 | const int w = |
afd78fd5 JH |
8677 | RExC_parse >= rangebegin ? |
8678 | RExC_parse - rangebegin : 0; | |
830247a4 | 8679 | vWARN4(RExC_parse, |
b45f050a | 8680 | "False [] range \"%*.*s\"", |
097eb12c | 8681 | w, w, rangebegin); |
afd78fd5 | 8682 | } |
73b437c8 | 8683 | if (!SIZE_ONLY) |
2283d326 KW |
8684 | stored += |
8685 | S_set_regclass_bit(aTHX_ pRExC_state, ret, '-'); | |
73b437c8 | 8686 | } else |
ffc61ed2 JH |
8687 | range = 1; /* yeah, it's a range! */ |
8688 | continue; /* but do it the next time */ | |
a0d0e21e | 8689 | } |
a687059c | 8690 | } |
ffc61ed2 | 8691 | |
93733859 | 8692 | /* now is the next time */ |
07be1b83 | 8693 | /*stored += (value - prevvalue + 1);*/ |
ae5c130c | 8694 | if (!SIZE_ONLY) { |
3568d838 | 8695 | if (prevvalue < 256) { |
1df70142 | 8696 | const IV ceilvalue = value < 256 ? value : 255; |
3dab1dad | 8697 | IV i; |
3568d838 | 8698 | #ifdef EBCDIC |
1b2d223b JH |
8699 | /* In EBCDIC [\x89-\x91] should include |
8700 | * the \x8e but [i-j] should not. */ | |
8701 | if (literal_endpoint == 2 && | |
8702 | ((isLOWER(prevvalue) && isLOWER(ceilvalue)) || | |
8703 | (isUPPER(prevvalue) && isUPPER(ceilvalue)))) | |
ffc61ed2 | 8704 | { |
3568d838 JH |
8705 | if (isLOWER(prevvalue)) { |
8706 | for (i = prevvalue; i <= ceilvalue; i++) | |
2670d666 | 8707 | if (isLOWER(i) && !ANYOF_BITMAP_TEST(ret,i)) { |
2283d326 KW |
8708 | stored += |
8709 | S_set_regclass_bit(aTHX_ pRExC_state, ret, i); | |
2670d666 | 8710 | } |
ffc61ed2 | 8711 | } else { |
3568d838 | 8712 | for (i = prevvalue; i <= ceilvalue; i++) |
2670d666 | 8713 | if (isUPPER(i) && !ANYOF_BITMAP_TEST(ret,i)) { |
2283d326 KW |
8714 | stored += |
8715 | S_set_regclass_bit(aTHX_ pRExC_state, ret, i); | |
2670d666 | 8716 | } |
ffc61ed2 | 8717 | } |
8ada0baa | 8718 | } |
ffc61ed2 | 8719 | else |
8ada0baa | 8720 | #endif |
07be1b83 YO |
8721 | for (i = prevvalue; i <= ceilvalue; i++) { |
8722 | if (!ANYOF_BITMAP_TEST(ret,i)) { | |
2283d326 KW |
8723 | stored += |
8724 | S_set_regclass_bit(aTHX_ pRExC_state, ret, i); | |
07be1b83 YO |
8725 | } |
8726 | } | |
3568d838 | 8727 | } |
a5961de5 | 8728 | if (value > 255 || UTF) { |
1df70142 AL |
8729 | const UV prevnatvalue = NATIVE_TO_UNI(prevvalue); |
8730 | const UV natvalue = NATIVE_TO_UNI(value); | |
07be1b83 | 8731 | stored+=2; /* can't optimize this class */ |
ef87b810 KW |
8732 | |
8733 | /* If the code point requires utf8 to represent, and we are not | |
8734 | * folding, it can't match unless the target is in utf8. Only | |
8735 | * a few code points above 255 fold to below it, so XXX an | |
8736 | * optimization would be to know which ones and set the flag | |
8737 | * appropriately. */ | |
8738 | ANYOF_FLAGS(ret) |= (FOLD || value < 256) | |
8739 | ? ANYOF_NONBITMAP | |
8740 | : ANYOF_UTF8; | |
b08decb7 | 8741 | if (prevnatvalue < natvalue) { /* what about > ? */ |
ffc61ed2 | 8742 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\t%04"UVxf"\n", |
b08decb7 JH |
8743 | prevnatvalue, natvalue); |
8744 | } | |
8745 | else if (prevnatvalue == natvalue) { | |
8746 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", natvalue); | |
09091399 | 8747 | if (FOLD) { |
89ebb4a3 | 8748 | U8 foldbuf[UTF8_MAXBYTES_CASE+1]; |
254ba52a | 8749 | STRLEN foldlen; |
1df70142 | 8750 | const UV f = to_uni_fold(natvalue, foldbuf, &foldlen); |
254ba52a | 8751 | |
e294cc5d JH |
8752 | #ifdef EBCDIC /* RD t/uni/fold ff and 6b */ |
8753 | if (RExC_precomp[0] == ':' && | |
8754 | RExC_precomp[1] == '[' && | |
8755 | (f == 0xDF || f == 0x92)) { | |
8756 | f = NATIVE_TO_UNI(f); | |
8757 | } | |
8758 | #endif | |
c840d2a2 JH |
8759 | /* If folding and foldable and a single |
8760 | * character, insert also the folded version | |
8761 | * to the charclass. */ | |
9e55ce06 | 8762 | if (f != value) { |
e294cc5d JH |
8763 | #ifdef EBCDIC /* RD tunifold ligatures s,t fb05, fb06 */ |
8764 | if ((RExC_precomp[0] == ':' && | |
8765 | RExC_precomp[1] == '[' && | |
8766 | (f == 0xA2 && | |
8767 | (value == 0xFB05 || value == 0xFB06))) ? | |
8768 | foldlen == ((STRLEN)UNISKIP(f) - 1) : | |
8769 | foldlen == (STRLEN)UNISKIP(f) ) | |
8770 | #else | |
eb160463 | 8771 | if (foldlen == (STRLEN)UNISKIP(f)) |
e294cc5d | 8772 | #endif |
9e55ce06 JH |
8773 | Perl_sv_catpvf(aTHX_ listsv, |
8774 | "%04"UVxf"\n", f); | |
8775 | else { | |
8776 | /* Any multicharacter foldings | |
8777 | * require the following transform: | |
8778 | * [ABCDEF] -> (?:[ABCabcDEFd]|pq|rst) | |
8779 | * where E folds into "pq" and F folds | |
8780 | * into "rst", all other characters | |
8781 | * fold to single characters. We save | |
8782 | * away these multicharacter foldings, | |
8783 | * to be later saved as part of the | |
8784 | * additional "s" data. */ | |
8785 | SV *sv; | |
8786 | ||
8787 | if (!unicode_alternate) | |
8788 | unicode_alternate = newAV(); | |
740cce10 NC |
8789 | sv = newSVpvn_utf8((char*)foldbuf, foldlen, |
8790 | TRUE); | |
9e55ce06 JH |
8791 | av_push(unicode_alternate, sv); |
8792 | } | |
8793 | } | |
254ba52a | 8794 | |
60a8b682 JH |
8795 | /* If folding and the value is one of the Greek |
8796 | * sigmas insert a few more sigmas to make the | |
8797 | * folding rules of the sigmas to work right. | |
8798 | * Note that not all the possible combinations | |
8799 | * are handled here: some of them are handled | |
9e55ce06 JH |
8800 | * by the standard folding rules, and some of |
8801 | * them (literal or EXACTF cases) are handled | |
8802 | * during runtime in regexec.c:S_find_byclass(). */ | |
09091399 JH |
8803 | if (value == UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA) { |
8804 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", | |
eb050b28 | 8805 | (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA); |
09091399 | 8806 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", |
eb050b28 | 8807 | (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA); |
09091399 JH |
8808 | } |
8809 | else if (value == UNICODE_GREEK_CAPITAL_LETTER_SIGMA) | |
8810 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", | |
eb050b28 | 8811 | (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA); |
09091399 JH |
8812 | } |
8813 | } | |
ffc61ed2 | 8814 | } |
1b2d223b JH |
8815 | #ifdef EBCDIC |
8816 | literal_endpoint = 0; | |
8817 | #endif | |
8ada0baa | 8818 | } |
ffc61ed2 JH |
8819 | |
8820 | range = 0; /* this range (if it was one) is done now */ | |
a0d0e21e | 8821 | } |
ffc61ed2 | 8822 | |
ffc61ed2 | 8823 | |
7f6f358c YO |
8824 | |
8825 | if (SIZE_ONLY) | |
8826 | return ret; | |
8827 | /****** !SIZE_ONLY AFTER HERE *********/ | |
8828 | ||
3b57cd43 | 8829 | if( stored == 1 && (value < 128 || (value < 256 && !UTF)) |
7f6f358c YO |
8830 | && !( ANYOF_FLAGS(ret) & ( ANYOF_FLAGS_ALL ^ ANYOF_FOLD ) ) |
8831 | ) { | |
1d5eda9d KW |
8832 | /* optimize single char class to an EXACT node but *only* when its not |
8833 | * a UTF/high char. Note that the information needed to decide to do | |
8834 | * this optimization is not currently available until the 2nd pass, and | |
8835 | * that the actually used EXACT node takes less space than the | |
8836 | * calculated ANYOF node, and hence the amount of space calculated in | |
8837 | * the first pass is larger than actually used. Currently we don't | |
8838 | * keep track of enough information to do this for nodes which contain | |
8839 | * matches outside the bitmap */ | |
07be1b83 YO |
8840 | const char * cur_parse= RExC_parse; |
8841 | RExC_emit = (regnode *)orig_emit; | |
8842 | RExC_parse = (char *)orig_parse; | |
7f6f358c YO |
8843 | ret = reg_node(pRExC_state, |
8844 | (U8)((ANYOF_FLAGS(ret) & ANYOF_FOLD) ? EXACTF : EXACT)); | |
07be1b83 | 8845 | RExC_parse = (char *)cur_parse; |
7f6f358c YO |
8846 | *STRING(ret)= (char)value; |
8847 | STR_LEN(ret)= 1; | |
8848 | RExC_emit += STR_SZ(1); | |
ef8d46e8 | 8849 | SvREFCNT_dec(listsv); |
7f6f358c YO |
8850 | return ret; |
8851 | } | |
ae5c130c | 8852 | /* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */ |
7f6f358c | 8853 | if ( /* If the only flag is folding (plus possibly inversion). */ |
516a5887 JH |
8854 | ((ANYOF_FLAGS(ret) & (ANYOF_FLAGS_ALL ^ ANYOF_INVERT)) == ANYOF_FOLD) |
8855 | ) { | |
a0ed51b3 | 8856 | for (value = 0; value < 256; ++value) { |
936ed897 | 8857 | if (ANYOF_BITMAP_TEST(ret, value)) { |
eb160463 | 8858 | UV fold = PL_fold[value]; |
ffc61ed2 JH |
8859 | |
8860 | if (fold != value) | |
8861 | ANYOF_BITMAP_SET(ret, fold); | |
ae5c130c GS |
8862 | } |
8863 | } | |
936ed897 | 8864 | ANYOF_FLAGS(ret) &= ~ANYOF_FOLD; |
ae5c130c | 8865 | } |
ffc61ed2 | 8866 | |
ae5c130c | 8867 | /* optimize inverted simple patterns (e.g. [^a-z]) */ |
7f6f358c | 8868 | if (optimize_invert && |
ffc61ed2 JH |
8869 | /* If the only flag is inversion. */ |
8870 | (ANYOF_FLAGS(ret) & ANYOF_FLAGS_ALL) == ANYOF_INVERT) { | |
b8c5462f | 8871 | for (value = 0; value < ANYOF_BITMAP_SIZE; ++value) |
936ed897 | 8872 | ANYOF_BITMAP(ret)[value] ^= ANYOF_FLAGS_ALL; |
1aa99e6b | 8873 | ANYOF_FLAGS(ret) = ANYOF_UNICODE_ALL; |
ae5c130c | 8874 | } |
7f6f358c | 8875 | { |
097eb12c | 8876 | AV * const av = newAV(); |
ffc61ed2 | 8877 | SV *rv; |
9e55ce06 | 8878 | /* The 0th element stores the character class description |
6a0407ee | 8879 | * in its textual form: used later (regexec.c:Perl_regclass_swash()) |
9e55ce06 JH |
8880 | * to initialize the appropriate swash (which gets stored in |
8881 | * the 1st element), and also useful for dumping the regnode. | |
8882 | * The 2nd element stores the multicharacter foldings, | |
6a0407ee | 8883 | * used later (regexec.c:S_reginclass()). */ |
ffc61ed2 JH |
8884 | av_store(av, 0, listsv); |
8885 | av_store(av, 1, NULL); | |
ad64d0ec NC |
8886 | av_store(av, 2, MUTABLE_SV(unicode_alternate)); |
8887 | rv = newRV_noinc(MUTABLE_SV(av)); | |
19860706 | 8888 | n = add_data(pRExC_state, 1, "s"); |
f8fc2ecf | 8889 | RExC_rxi->data->data[n] = (void*)rv; |
ffc61ed2 | 8890 | ARG_SET(ret, n); |
a0ed51b3 | 8891 | } |
a0ed51b3 LW |
8892 | return ret; |
8893 | } | |
89836f1f YO |
8894 | #undef _C_C_T_ |
8895 | ||
a0ed51b3 | 8896 | |
bcdf7404 YO |
8897 | /* reg_skipcomment() |
8898 | ||
8899 | Absorbs an /x style # comments from the input stream. | |
8900 | Returns true if there is more text remaining in the stream. | |
8901 | Will set the REG_SEEN_RUN_ON_COMMENT flag if the comment | |
8902 | terminates the pattern without including a newline. | |
8903 | ||
8904 | Note its the callers responsibility to ensure that we are | |
8905 | actually in /x mode | |
8906 | ||
8907 | */ | |
8908 | ||
8909 | STATIC bool | |
8910 | S_reg_skipcomment(pTHX_ RExC_state_t *pRExC_state) | |
8911 | { | |
8912 | bool ended = 0; | |
7918f24d NC |
8913 | |
8914 | PERL_ARGS_ASSERT_REG_SKIPCOMMENT; | |
8915 | ||
bcdf7404 YO |
8916 | while (RExC_parse < RExC_end) |
8917 | if (*RExC_parse++ == '\n') { | |
8918 | ended = 1; | |
8919 | break; | |
8920 | } | |
8921 | if (!ended) { | |
8922 | /* we ran off the end of the pattern without ending | |
8923 | the comment, so we have to add an \n when wrapping */ | |
8924 | RExC_seen |= REG_SEEN_RUN_ON_COMMENT; | |
8925 | return 0; | |
8926 | } else | |
8927 | return 1; | |
8928 | } | |
8929 | ||
8930 | /* nextchar() | |
8931 | ||
3b753521 | 8932 | Advances the parse position, and optionally absorbs |
bcdf7404 YO |
8933 | "whitespace" from the inputstream. |
8934 | ||
8935 | Without /x "whitespace" means (?#...) style comments only, | |
8936 | with /x this means (?#...) and # comments and whitespace proper. | |
8937 | ||
8938 | Returns the RExC_parse point from BEFORE the scan occurs. | |
8939 | ||
8940 | This is the /x friendly way of saying RExC_parse++. | |
8941 | */ | |
8942 | ||
76e3520e | 8943 | STATIC char* |
830247a4 | 8944 | S_nextchar(pTHX_ RExC_state_t *pRExC_state) |
a0d0e21e | 8945 | { |
097eb12c | 8946 | char* const retval = RExC_parse++; |
a0d0e21e | 8947 | |
7918f24d NC |
8948 | PERL_ARGS_ASSERT_NEXTCHAR; |
8949 | ||
4633a7c4 | 8950 | for (;;) { |
830247a4 IZ |
8951 | if (*RExC_parse == '(' && RExC_parse[1] == '?' && |
8952 | RExC_parse[2] == '#') { | |
e994fd66 AE |
8953 | while (*RExC_parse != ')') { |
8954 | if (RExC_parse == RExC_end) | |
8955 | FAIL("Sequence (?#... not terminated"); | |
830247a4 | 8956 | RExC_parse++; |
e994fd66 | 8957 | } |
830247a4 | 8958 | RExC_parse++; |
4633a7c4 LW |
8959 | continue; |
8960 | } | |
bbe252da | 8961 | if (RExC_flags & RXf_PMf_EXTENDED) { |
830247a4 IZ |
8962 | if (isSPACE(*RExC_parse)) { |
8963 | RExC_parse++; | |
748a9306 LW |
8964 | continue; |
8965 | } | |
830247a4 | 8966 | else if (*RExC_parse == '#') { |
bcdf7404 YO |
8967 | if ( reg_skipcomment( pRExC_state ) ) |
8968 | continue; | |
748a9306 | 8969 | } |
748a9306 | 8970 | } |
4633a7c4 | 8971 | return retval; |
a0d0e21e | 8972 | } |
a687059c LW |
8973 | } |
8974 | ||
8975 | /* | |
c277df42 | 8976 | - reg_node - emit a node |
a0d0e21e | 8977 | */ |
76e3520e | 8978 | STATIC regnode * /* Location. */ |
830247a4 | 8979 | S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op) |
a687059c | 8980 | { |
97aff369 | 8981 | dVAR; |
c277df42 | 8982 | register regnode *ptr; |
504618e9 | 8983 | regnode * const ret = RExC_emit; |
07be1b83 | 8984 | GET_RE_DEBUG_FLAGS_DECL; |
a687059c | 8985 | |
7918f24d NC |
8986 | PERL_ARGS_ASSERT_REG_NODE; |
8987 | ||
c277df42 | 8988 | if (SIZE_ONLY) { |
830247a4 IZ |
8989 | SIZE_ALIGN(RExC_size); |
8990 | RExC_size += 1; | |
a0d0e21e LW |
8991 | return(ret); |
8992 | } | |
3b57cd43 YO |
8993 | if (RExC_emit >= RExC_emit_bound) |
8994 | Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op); | |
8995 | ||
c277df42 | 8996 | NODE_ALIGN_FILL(ret); |
a0d0e21e | 8997 | ptr = ret; |
c277df42 | 8998 | FILL_ADVANCE_NODE(ptr, op); |
7122b237 | 8999 | #ifdef RE_TRACK_PATTERN_OFFSETS |
fac92740 | 9000 | if (RExC_offsets) { /* MJD */ |
07be1b83 | 9001 | MJD_OFFSET_DEBUG(("%s:%d: (op %s) %s %"UVuf" (len %"UVuf") (max %"UVuf").\n", |
fac92740 | 9002 | "reg_node", __LINE__, |
13d6edb4 | 9003 | PL_reg_name[op], |
07be1b83 YO |
9004 | (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] |
9005 | ? "Overwriting end of array!\n" : "OK", | |
9006 | (UV)(RExC_emit - RExC_emit_start), | |
9007 | (UV)(RExC_parse - RExC_start), | |
9008 | (UV)RExC_offsets[0])); | |
ccb2c380 | 9009 | Set_Node_Offset(RExC_emit, RExC_parse + (op == END)); |
fac92740 | 9010 | } |
7122b237 | 9011 | #endif |
830247a4 | 9012 | RExC_emit = ptr; |
a0d0e21e | 9013 | return(ret); |
a687059c LW |
9014 | } |
9015 | ||
9016 | /* | |
a0d0e21e LW |
9017 | - reganode - emit a node with an argument |
9018 | */ | |
76e3520e | 9019 | STATIC regnode * /* Location. */ |
830247a4 | 9020 | S_reganode(pTHX_ RExC_state_t *pRExC_state, U8 op, U32 arg) |
fe14fcc3 | 9021 | { |
97aff369 | 9022 | dVAR; |
c277df42 | 9023 | register regnode *ptr; |
504618e9 | 9024 | regnode * const ret = RExC_emit; |
07be1b83 | 9025 | GET_RE_DEBUG_FLAGS_DECL; |
fe14fcc3 | 9026 | |
7918f24d NC |
9027 | PERL_ARGS_ASSERT_REGANODE; |
9028 | ||
c277df42 | 9029 | if (SIZE_ONLY) { |
830247a4 IZ |
9030 | SIZE_ALIGN(RExC_size); |
9031 | RExC_size += 2; | |
6bda09f9 YO |
9032 | /* |
9033 | We can't do this: | |
9034 | ||
9035 | assert(2==regarglen[op]+1); | |
9036 | ||
9037 | Anything larger than this has to allocate the extra amount. | |
9038 | If we changed this to be: | |
9039 | ||
9040 | RExC_size += (1 + regarglen[op]); | |
9041 | ||
9042 | then it wouldn't matter. Its not clear what side effect | |
9043 | might come from that so its not done so far. | |
9044 | -- dmq | |
9045 | */ | |
a0d0e21e LW |
9046 | return(ret); |
9047 | } | |
3b57cd43 YO |
9048 | if (RExC_emit >= RExC_emit_bound) |
9049 | Perl_croak(aTHX_ "panic: reg_node overrun trying to emit %d", op); | |
9050 | ||
c277df42 | 9051 | NODE_ALIGN_FILL(ret); |
a0d0e21e | 9052 | ptr = ret; |
c277df42 | 9053 | FILL_ADVANCE_NODE_ARG(ptr, op, arg); |
7122b237 | 9054 | #ifdef RE_TRACK_PATTERN_OFFSETS |
fac92740 | 9055 | if (RExC_offsets) { /* MJD */ |
07be1b83 | 9056 | MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n", |
fac92740 | 9057 | "reganode", |
ccb2c380 | 9058 | __LINE__, |
13d6edb4 | 9059 | PL_reg_name[op], |
07be1b83 | 9060 | (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] ? |
fac92740 | 9061 | "Overwriting end of array!\n" : "OK", |
07be1b83 YO |
9062 | (UV)(RExC_emit - RExC_emit_start), |
9063 | (UV)(RExC_parse - RExC_start), | |
9064 | (UV)RExC_offsets[0])); | |
ccb2c380 | 9065 | Set_Cur_Node_Offset; |
fac92740 | 9066 | } |
7122b237 | 9067 | #endif |
830247a4 | 9068 | RExC_emit = ptr; |
a0d0e21e | 9069 | return(ret); |
fe14fcc3 LW |
9070 | } |
9071 | ||
9072 | /* | |
cd439c50 | 9073 | - reguni - emit (if appropriate) a Unicode character |
a0ed51b3 | 9074 | */ |
71207a34 AL |
9075 | STATIC STRLEN |
9076 | S_reguni(pTHX_ const RExC_state_t *pRExC_state, UV uv, char* s) | |
a0ed51b3 | 9077 | { |
97aff369 | 9078 | dVAR; |
7918f24d NC |
9079 | |
9080 | PERL_ARGS_ASSERT_REGUNI; | |
9081 | ||
71207a34 | 9082 | return SIZE_ONLY ? UNISKIP(uv) : (uvchr_to_utf8((U8*)s, uv) - (U8*)s); |
a0ed51b3 LW |
9083 | } |
9084 | ||
9085 | /* | |
a0d0e21e LW |
9086 | - reginsert - insert an operator in front of already-emitted operand |
9087 | * | |
9088 | * Means relocating the operand. | |
9089 | */ | |
76e3520e | 9090 | STATIC void |
6bda09f9 | 9091 | S_reginsert(pTHX_ RExC_state_t *pRExC_state, U8 op, regnode *opnd, U32 depth) |
a687059c | 9092 | { |
97aff369 | 9093 | dVAR; |
c277df42 IZ |
9094 | register regnode *src; |
9095 | register regnode *dst; | |
9096 | register regnode *place; | |
504618e9 | 9097 | const int offset = regarglen[(U8)op]; |
6bda09f9 | 9098 | const int size = NODE_STEP_REGNODE + offset; |
07be1b83 | 9099 | GET_RE_DEBUG_FLAGS_DECL; |
7918f24d NC |
9100 | |
9101 | PERL_ARGS_ASSERT_REGINSERT; | |
def51078 | 9102 | PERL_UNUSED_ARG(depth); |
22c35a8c | 9103 | /* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */ |
13d6edb4 | 9104 | DEBUG_PARSE_FMT("inst"," - %s",PL_reg_name[op]); |
c277df42 | 9105 | if (SIZE_ONLY) { |
6bda09f9 | 9106 | RExC_size += size; |
a0d0e21e LW |
9107 | return; |
9108 | } | |
a687059c | 9109 | |
830247a4 | 9110 | src = RExC_emit; |
6bda09f9 | 9111 | RExC_emit += size; |
830247a4 | 9112 | dst = RExC_emit; |
40d049e4 | 9113 | if (RExC_open_parens) { |
6bda09f9 | 9114 | int paren; |
3b57cd43 | 9115 | /*DEBUG_PARSE_FMT("inst"," - %"IVdf, (IV)RExC_npar);*/ |
6bda09f9 | 9116 | for ( paren=0 ; paren < RExC_npar ; paren++ ) { |
40d049e4 | 9117 | if ( RExC_open_parens[paren] >= opnd ) { |
3b57cd43 | 9118 | /*DEBUG_PARSE_FMT("open"," - %d",size);*/ |
40d049e4 YO |
9119 | RExC_open_parens[paren] += size; |
9120 | } else { | |
3b57cd43 | 9121 | /*DEBUG_PARSE_FMT("open"," - %s","ok");*/ |
40d049e4 YO |
9122 | } |
9123 | if ( RExC_close_parens[paren] >= opnd ) { | |
3b57cd43 | 9124 | /*DEBUG_PARSE_FMT("close"," - %d",size);*/ |
40d049e4 YO |
9125 | RExC_close_parens[paren] += size; |
9126 | } else { | |
3b57cd43 | 9127 | /*DEBUG_PARSE_FMT("close"," - %s","ok");*/ |
40d049e4 YO |
9128 | } |
9129 | } | |
6bda09f9 | 9130 | } |
40d049e4 | 9131 | |
fac92740 | 9132 | while (src > opnd) { |
c277df42 | 9133 | StructCopy(--src, --dst, regnode); |
7122b237 | 9134 | #ifdef RE_TRACK_PATTERN_OFFSETS |
fac92740 | 9135 | if (RExC_offsets) { /* MJD 20010112 */ |
07be1b83 | 9136 | MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s copy %"UVuf" -> %"UVuf" (max %"UVuf").\n", |
fac92740 | 9137 | "reg_insert", |
ccb2c380 | 9138 | __LINE__, |
13d6edb4 | 9139 | PL_reg_name[op], |
07be1b83 YO |
9140 | (UV)(dst - RExC_emit_start) > RExC_offsets[0] |
9141 | ? "Overwriting end of array!\n" : "OK", | |
9142 | (UV)(src - RExC_emit_start), | |
9143 | (UV)(dst - RExC_emit_start), | |
9144 | (UV)RExC_offsets[0])); | |
ccb2c380 MP |
9145 | Set_Node_Offset_To_R(dst-RExC_emit_start, Node_Offset(src)); |
9146 | Set_Node_Length_To_R(dst-RExC_emit_start, Node_Length(src)); | |
fac92740 | 9147 | } |
7122b237 | 9148 | #endif |
fac92740 MJD |
9149 | } |
9150 | ||
a0d0e21e LW |
9151 | |
9152 | place = opnd; /* Op node, where operand used to be. */ | |
7122b237 | 9153 | #ifdef RE_TRACK_PATTERN_OFFSETS |
fac92740 | 9154 | if (RExC_offsets) { /* MJD */ |
07be1b83 | 9155 | MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n", |
fac92740 | 9156 | "reginsert", |
ccb2c380 | 9157 | __LINE__, |
13d6edb4 | 9158 | PL_reg_name[op], |
07be1b83 | 9159 | (UV)(place - RExC_emit_start) > RExC_offsets[0] |
fac92740 | 9160 | ? "Overwriting end of array!\n" : "OK", |
07be1b83 YO |
9161 | (UV)(place - RExC_emit_start), |
9162 | (UV)(RExC_parse - RExC_start), | |
786e8c11 | 9163 | (UV)RExC_offsets[0])); |
ccb2c380 | 9164 | Set_Node_Offset(place, RExC_parse); |
45948336 | 9165 | Set_Node_Length(place, 1); |
fac92740 | 9166 | } |
7122b237 | 9167 | #endif |
c277df42 IZ |
9168 | src = NEXTOPER(place); |
9169 | FILL_ADVANCE_NODE(place, op); | |
9170 | Zero(src, offset, regnode); | |
a687059c LW |
9171 | } |
9172 | ||
9173 | /* | |
c277df42 | 9174 | - regtail - set the next-pointer at the end of a node chain of p to val. |
3dab1dad | 9175 | - SEE ALSO: regtail_study |
a0d0e21e | 9176 | */ |
097eb12c | 9177 | /* TODO: All three parms should be const */ |
76e3520e | 9178 | STATIC void |
3dab1dad | 9179 | S_regtail(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth) |
a687059c | 9180 | { |
97aff369 | 9181 | dVAR; |
c277df42 | 9182 | register regnode *scan; |
72f13be8 | 9183 | GET_RE_DEBUG_FLAGS_DECL; |
7918f24d NC |
9184 | |
9185 | PERL_ARGS_ASSERT_REGTAIL; | |
f9049ba1 SP |
9186 | #ifndef DEBUGGING |
9187 | PERL_UNUSED_ARG(depth); | |
9188 | #endif | |
a0d0e21e | 9189 | |
c277df42 | 9190 | if (SIZE_ONLY) |
a0d0e21e LW |
9191 | return; |
9192 | ||
9193 | /* Find last node. */ | |
9194 | scan = p; | |
9195 | for (;;) { | |
504618e9 | 9196 | regnode * const temp = regnext(scan); |
3dab1dad YO |
9197 | DEBUG_PARSE_r({ |
9198 | SV * const mysv=sv_newmortal(); | |
9199 | DEBUG_PARSE_MSG((scan==p ? "tail" : "")); | |
9200 | regprop(RExC_rx, mysv, scan); | |
eaf3ca90 YO |
9201 | PerlIO_printf(Perl_debug_log, "~ %s (%d) %s %s\n", |
9202 | SvPV_nolen_const(mysv), REG_NODE_NUM(scan), | |
9203 | (temp == NULL ? "->" : ""), | |
13d6edb4 | 9204 | (temp == NULL ? PL_reg_name[OP(val)] : "") |
eaf3ca90 | 9205 | ); |
3dab1dad YO |
9206 | }); |
9207 | if (temp == NULL) | |
9208 | break; | |
9209 | scan = temp; | |
9210 | } | |
9211 | ||
9212 | if (reg_off_by_arg[OP(scan)]) { | |
9213 | ARG_SET(scan, val - scan); | |
9214 | } | |
9215 | else { | |
9216 | NEXT_OFF(scan) = val - scan; | |
9217 | } | |
9218 | } | |
9219 | ||
07be1b83 | 9220 | #ifdef DEBUGGING |
3dab1dad YO |
9221 | /* |
9222 | - regtail_study - set the next-pointer at the end of a node chain of p to val. | |
9223 | - Look for optimizable sequences at the same time. | |
9224 | - currently only looks for EXACT chains. | |
07be1b83 YO |
9225 | |
9226 | This is expermental code. The idea is to use this routine to perform | |
9227 | in place optimizations on branches and groups as they are constructed, | |
9228 | with the long term intention of removing optimization from study_chunk so | |
9229 | that it is purely analytical. | |
9230 | ||
9231 | Currently only used when in DEBUG mode. The macro REGTAIL_STUDY() is used | |
9232 | to control which is which. | |
9233 | ||
3dab1dad YO |
9234 | */ |
9235 | /* TODO: All four parms should be const */ | |
07be1b83 | 9236 | |
3dab1dad YO |
9237 | STATIC U8 |
9238 | S_regtail_study(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth) | |
9239 | { | |
9240 | dVAR; | |
9241 | register regnode *scan; | |
07be1b83 YO |
9242 | U8 exact = PSEUDO; |
9243 | #ifdef EXPERIMENTAL_INPLACESCAN | |
9244 | I32 min = 0; | |
9245 | #endif | |
3dab1dad YO |
9246 | GET_RE_DEBUG_FLAGS_DECL; |
9247 | ||
7918f24d NC |
9248 | PERL_ARGS_ASSERT_REGTAIL_STUDY; |
9249 | ||
07be1b83 | 9250 | |
3dab1dad YO |
9251 | if (SIZE_ONLY) |
9252 | return exact; | |
9253 | ||
9254 | /* Find last node. */ | |
9255 | ||
9256 | scan = p; | |
9257 | for (;;) { | |
9258 | regnode * const temp = regnext(scan); | |
07be1b83 YO |
9259 | #ifdef EXPERIMENTAL_INPLACESCAN |
9260 | if (PL_regkind[OP(scan)] == EXACT) | |
9261 | if (join_exact(pRExC_state,scan,&min,1,val,depth+1)) | |
9262 | return EXACT; | |
9263 | #endif | |
3dab1dad YO |
9264 | if ( exact ) { |
9265 | switch (OP(scan)) { | |
9266 | case EXACT: | |
9267 | case EXACTF: | |
9268 | case EXACTFL: | |
9269 | if( exact == PSEUDO ) | |
9270 | exact= OP(scan); | |
07be1b83 YO |
9271 | else if ( exact != OP(scan) ) |
9272 | exact= 0; | |
3dab1dad YO |
9273 | case NOTHING: |
9274 | break; | |
9275 | default: | |
9276 | exact= 0; | |
9277 | } | |
9278 | } | |
9279 | DEBUG_PARSE_r({ | |
9280 | SV * const mysv=sv_newmortal(); | |
9281 | DEBUG_PARSE_MSG((scan==p ? "tsdy" : "")); | |
9282 | regprop(RExC_rx, mysv, scan); | |
eaf3ca90 | 9283 | PerlIO_printf(Perl_debug_log, "~ %s (%d) -> %s\n", |
3dab1dad | 9284 | SvPV_nolen_const(mysv), |
eaf3ca90 | 9285 | REG_NODE_NUM(scan), |
13d6edb4 | 9286 | PL_reg_name[exact]); |
3dab1dad | 9287 | }); |
a0d0e21e LW |
9288 | if (temp == NULL) |
9289 | break; | |
9290 | scan = temp; | |
9291 | } | |
07be1b83 YO |
9292 | DEBUG_PARSE_r({ |
9293 | SV * const mysv_val=sv_newmortal(); | |
9294 | DEBUG_PARSE_MSG(""); | |
9295 | regprop(RExC_rx, mysv_val, val); | |
70685ca0 JH |
9296 | PerlIO_printf(Perl_debug_log, "~ attach to %s (%"IVdf") offset to %"IVdf"\n", |
9297 | SvPV_nolen_const(mysv_val), | |
9298 | (IV)REG_NODE_NUM(val), | |
9299 | (IV)(val - scan) | |
07be1b83 YO |
9300 | ); |
9301 | }); | |
c277df42 IZ |
9302 | if (reg_off_by_arg[OP(scan)]) { |
9303 | ARG_SET(scan, val - scan); | |
a0ed51b3 LW |
9304 | } |
9305 | else { | |
c277df42 IZ |
9306 | NEXT_OFF(scan) = val - scan; |
9307 | } | |
3dab1dad YO |
9308 | |
9309 | return exact; | |
a687059c | 9310 | } |
07be1b83 | 9311 | #endif |
a687059c LW |
9312 | |
9313 | /* | |
fd181c75 | 9314 | - regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form |
a687059c | 9315 | */ |
f7819f85 | 9316 | #ifdef DEBUGGING |
c33269f7 | 9317 | static void |
7918f24d NC |
9318 | S_regdump_extflags(pTHX_ const char *lead, const U32 flags) |
9319 | { | |
f7819f85 A |
9320 | int bit; |
9321 | int set=0; | |
7918f24d | 9322 | |
f7819f85 A |
9323 | for (bit=0; bit<32; bit++) { |
9324 | if (flags & (1<<bit)) { | |
9325 | if (!set++ && lead) | |
9326 | PerlIO_printf(Perl_debug_log, "%s",lead); | |
9327 | PerlIO_printf(Perl_debug_log, "%s ",PL_reg_extflags_name[bit]); | |
9328 | } | |
9329 | } | |
9330 | if (lead) { | |
9331 | if (set) | |
9332 | PerlIO_printf(Perl_debug_log, "\n"); | |
9333 | else | |
9334 | PerlIO_printf(Perl_debug_log, "%s[none-set]\n",lead); | |
9335 | } | |
9336 | } | |
9337 | #endif | |
9338 | ||
a687059c | 9339 | void |
097eb12c | 9340 | Perl_regdump(pTHX_ const regexp *r) |
a687059c | 9341 | { |
35ff7856 | 9342 | #ifdef DEBUGGING |
97aff369 | 9343 | dVAR; |
c445ea15 | 9344 | SV * const sv = sv_newmortal(); |
ab3bbdeb | 9345 | SV *dsv= sv_newmortal(); |
f8fc2ecf | 9346 | RXi_GET_DECL(r,ri); |
f7819f85 | 9347 | GET_RE_DEBUG_FLAGS_DECL; |
a687059c | 9348 | |
7918f24d NC |
9349 | PERL_ARGS_ASSERT_REGDUMP; |
9350 | ||
f8fc2ecf | 9351 | (void)dumpuntil(r, ri->program, ri->program + 1, NULL, NULL, sv, 0, 0); |
a0d0e21e LW |
9352 | |
9353 | /* Header fields of interest. */ | |
ab3bbdeb YO |
9354 | if (r->anchored_substr) { |
9355 | RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->anchored_substr), | |
9356 | RE_SV_DUMPLEN(r->anchored_substr), 30); | |
7b0972df | 9357 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb YO |
9358 | "anchored %s%s at %"IVdf" ", |
9359 | s, RE_SV_TAIL(r->anchored_substr), | |
7b0972df | 9360 | (IV)r->anchored_offset); |
ab3bbdeb YO |
9361 | } else if (r->anchored_utf8) { |
9362 | RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->anchored_utf8), | |
9363 | RE_SV_DUMPLEN(r->anchored_utf8), 30); | |
33b8afdf | 9364 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb YO |
9365 | "anchored utf8 %s%s at %"IVdf" ", |
9366 | s, RE_SV_TAIL(r->anchored_utf8), | |
33b8afdf | 9367 | (IV)r->anchored_offset); |
ab3bbdeb YO |
9368 | } |
9369 | if (r->float_substr) { | |
9370 | RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->float_substr), | |
9371 | RE_SV_DUMPLEN(r->float_substr), 30); | |
7b0972df | 9372 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb YO |
9373 | "floating %s%s at %"IVdf"..%"UVuf" ", |
9374 | s, RE_SV_TAIL(r->float_substr), | |
7b0972df | 9375 | (IV)r->float_min_offset, (UV)r->float_max_offset); |
ab3bbdeb YO |
9376 | } else if (r->float_utf8) { |
9377 | RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->float_utf8), | |
9378 | RE_SV_DUMPLEN(r->float_utf8), 30); | |
33b8afdf | 9379 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb YO |
9380 | "floating utf8 %s%s at %"IVdf"..%"UVuf" ", |
9381 | s, RE_SV_TAIL(r->float_utf8), | |
33b8afdf | 9382 | (IV)r->float_min_offset, (UV)r->float_max_offset); |
ab3bbdeb | 9383 | } |
33b8afdf | 9384 | if (r->check_substr || r->check_utf8) |
b81d288d | 9385 | PerlIO_printf(Perl_debug_log, |
10edeb5d JH |
9386 | (const char *) |
9387 | (r->check_substr == r->float_substr | |
9388 | && r->check_utf8 == r->float_utf8 | |
9389 | ? "(checking floating" : "(checking anchored")); | |
bbe252da | 9390 | if (r->extflags & RXf_NOSCAN) |
c277df42 | 9391 | PerlIO_printf(Perl_debug_log, " noscan"); |
bbe252da | 9392 | if (r->extflags & RXf_CHECK_ALL) |
c277df42 | 9393 | PerlIO_printf(Perl_debug_log, " isall"); |
33b8afdf | 9394 | if (r->check_substr || r->check_utf8) |
c277df42 IZ |
9395 | PerlIO_printf(Perl_debug_log, ") "); |
9396 | ||
f8fc2ecf YO |
9397 | if (ri->regstclass) { |
9398 | regprop(r, sv, ri->regstclass); | |
1de06328 | 9399 | PerlIO_printf(Perl_debug_log, "stclass %s ", SvPVX_const(sv)); |
46fc3d4c | 9400 | } |
bbe252da | 9401 | if (r->extflags & RXf_ANCH) { |
774d564b | 9402 | PerlIO_printf(Perl_debug_log, "anchored"); |
bbe252da | 9403 | if (r->extflags & RXf_ANCH_BOL) |
774d564b | 9404 | PerlIO_printf(Perl_debug_log, "(BOL)"); |
bbe252da | 9405 | if (r->extflags & RXf_ANCH_MBOL) |
c277df42 | 9406 | PerlIO_printf(Perl_debug_log, "(MBOL)"); |
bbe252da | 9407 | if (r->extflags & RXf_ANCH_SBOL) |
cad2e5aa | 9408 | PerlIO_printf(Perl_debug_log, "(SBOL)"); |
bbe252da | 9409 | if (r->extflags & RXf_ANCH_GPOS) |
774d564b | 9410 | PerlIO_printf(Perl_debug_log, "(GPOS)"); |
9411 | PerlIO_putc(Perl_debug_log, ' '); | |
9412 | } | |
bbe252da | 9413 | if (r->extflags & RXf_GPOS_SEEN) |
70685ca0 | 9414 | PerlIO_printf(Perl_debug_log, "GPOS:%"UVuf" ", (UV)r->gofs); |
bbe252da | 9415 | if (r->intflags & PREGf_SKIP) |
760ac839 | 9416 | PerlIO_printf(Perl_debug_log, "plus "); |
bbe252da | 9417 | if (r->intflags & PREGf_IMPLICIT) |
760ac839 | 9418 | PerlIO_printf(Perl_debug_log, "implicit "); |
70685ca0 | 9419 | PerlIO_printf(Perl_debug_log, "minlen %"IVdf" ", (IV)r->minlen); |
bbe252da | 9420 | if (r->extflags & RXf_EVAL_SEEN) |
ce862d02 | 9421 | PerlIO_printf(Perl_debug_log, "with eval "); |
760ac839 | 9422 | PerlIO_printf(Perl_debug_log, "\n"); |
f7819f85 | 9423 | DEBUG_FLAGS_r(regdump_extflags("r->extflags: ",r->extflags)); |
65e66c80 | 9424 | #else |
7918f24d | 9425 | PERL_ARGS_ASSERT_REGDUMP; |
96a5add6 | 9426 | PERL_UNUSED_CONTEXT; |
65e66c80 | 9427 | PERL_UNUSED_ARG(r); |
17c3b450 | 9428 | #endif /* DEBUGGING */ |
a687059c LW |
9429 | } |
9430 | ||
9431 | /* | |
a0d0e21e LW |
9432 | - regprop - printable representation of opcode |
9433 | */ | |
3339dfd8 YO |
9434 | #define EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags) \ |
9435 | STMT_START { \ | |
9436 | if (do_sep) { \ | |
9437 | Perl_sv_catpvf(aTHX_ sv,"%s][%s",PL_colors[1],PL_colors[0]); \ | |
9438 | if (flags & ANYOF_INVERT) \ | |
9439 | /*make sure the invert info is in each */ \ | |
9440 | sv_catpvs(sv, "^"); \ | |
9441 | do_sep = 0; \ | |
9442 | } \ | |
9443 | } STMT_END | |
9444 | ||
46fc3d4c | 9445 | void |
32fc9b6a | 9446 | Perl_regprop(pTHX_ const regexp *prog, SV *sv, const regnode *o) |
a687059c | 9447 | { |
35ff7856 | 9448 | #ifdef DEBUGGING |
97aff369 | 9449 | dVAR; |
9b155405 | 9450 | register int k; |
f8fc2ecf | 9451 | RXi_GET_DECL(prog,progi); |
1de06328 | 9452 | GET_RE_DEBUG_FLAGS_DECL; |
f8fc2ecf | 9453 | |
7918f24d | 9454 | PERL_ARGS_ASSERT_REGPROP; |
a0d0e21e | 9455 | |
76f68e9b | 9456 | sv_setpvs(sv, ""); |
8aa23a47 | 9457 | |
03363afd | 9458 | if (OP(o) > REGNODE_MAX) /* regnode.type is unsigned */ |
830247a4 IZ |
9459 | /* It would be nice to FAIL() here, but this may be called from |
9460 | regexec.c, and it would be hard to supply pRExC_state. */ | |
a5ca303d | 9461 | Perl_croak(aTHX_ "Corrupted regexp opcode %d > %d", (int)OP(o), (int)REGNODE_MAX); |
13d6edb4 | 9462 | sv_catpv(sv, PL_reg_name[OP(o)]); /* Take off const! */ |
9b155405 | 9463 | |
3dab1dad | 9464 | k = PL_regkind[OP(o)]; |
9b155405 | 9465 | |
2a782b5b | 9466 | if (k == EXACT) { |
f92a2122 | 9467 | sv_catpvs(sv, " "); |
ab3bbdeb YO |
9468 | /* Using is_utf8_string() (via PERL_PV_UNI_DETECT) |
9469 | * is a crude hack but it may be the best for now since | |
9470 | * we have no flag "this EXACTish node was UTF-8" | |
9471 | * --jhi */ | |
f92a2122 NC |
9472 | pv_pretty(sv, STRING(o), STR_LEN(o), 60, PL_colors[0], PL_colors[1], |
9473 | PERL_PV_ESCAPE_UNI_DETECT | | |
9474 | PERL_PV_PRETTY_ELLIPSES | | |
9475 | PERL_PV_PRETTY_LTGT | | |
9476 | PERL_PV_PRETTY_NOCLEAR | |
9477 | ); | |
bb263b4e | 9478 | } else if (k == TRIE) { |
3dab1dad | 9479 | /* print the details of the trie in dumpuntil instead, as |
f8fc2ecf | 9480 | * progi->data isn't available here */ |
1de06328 | 9481 | const char op = OP(o); |
647f639f | 9482 | const U32 n = ARG(o); |
1de06328 | 9483 | const reg_ac_data * const ac = IS_TRIE_AC(op) ? |
f8fc2ecf | 9484 | (reg_ac_data *)progi->data->data[n] : |
1de06328 | 9485 | NULL; |
3251b653 NC |
9486 | const reg_trie_data * const trie |
9487 | = (reg_trie_data*)progi->data->data[!IS_TRIE_AC(op) ? n : ac->trie]; | |
1de06328 | 9488 | |
13d6edb4 | 9489 | Perl_sv_catpvf(aTHX_ sv, "-%s",PL_reg_name[o->flags]); |
1de06328 YO |
9490 | DEBUG_TRIE_COMPILE_r( |
9491 | Perl_sv_catpvf(aTHX_ sv, | |
9492 | "<S:%"UVuf"/%"IVdf" W:%"UVuf" L:%"UVuf"/%"UVuf" C:%"UVuf"/%"UVuf">", | |
9493 | (UV)trie->startstate, | |
1e2e3d02 | 9494 | (IV)trie->statecount-1, /* -1 because of the unused 0 element */ |
1de06328 YO |
9495 | (UV)trie->wordcount, |
9496 | (UV)trie->minlen, | |
9497 | (UV)trie->maxlen, | |
9498 | (UV)TRIE_CHARCOUNT(trie), | |
9499 | (UV)trie->uniquecharcount | |
9500 | ) | |
9501 | ); | |
9502 | if ( IS_ANYOF_TRIE(op) || trie->bitmap ) { | |
9503 | int i; | |
9504 | int rangestart = -1; | |
f46cb337 | 9505 | U8* bitmap = IS_ANYOF_TRIE(op) ? (U8*)ANYOF_BITMAP(o) : (U8*)TRIE_BITMAP(trie); |
f3a2811a | 9506 | sv_catpvs(sv, "["); |
1de06328 YO |
9507 | for (i = 0; i <= 256; i++) { |
9508 | if (i < 256 && BITMAP_TEST(bitmap,i)) { | |
9509 | if (rangestart == -1) | |
9510 | rangestart = i; | |
9511 | } else if (rangestart != -1) { | |
9512 | if (i <= rangestart + 3) | |
9513 | for (; rangestart < i; rangestart++) | |
9514 | put_byte(sv, rangestart); | |
9515 | else { | |
9516 | put_byte(sv, rangestart); | |
9517 | sv_catpvs(sv, "-"); | |
9518 | put_byte(sv, i - 1); | |
9519 | } | |
9520 | rangestart = -1; | |
9521 | } | |
9522 | } | |
f3a2811a | 9523 | sv_catpvs(sv, "]"); |
1de06328 YO |
9524 | } |
9525 | ||
a3621e74 | 9526 | } else if (k == CURLY) { |
cb434fcc | 9527 | if (OP(o) == CURLYM || OP(o) == CURLYN || OP(o) == CURLYX) |
cea2e8a9 GS |
9528 | Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */ |
9529 | Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o)); | |
a0d0e21e | 9530 | } |
2c2d71f5 JH |
9531 | else if (k == WHILEM && o->flags) /* Ordinal/of */ |
9532 | Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4); | |
1f1031fe | 9533 | else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP || OP(o)==ACCEPT) { |
894356b3 | 9534 | Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */ |
5daac39c | 9535 | if ( RXp_PAREN_NAMES(prog) ) { |
ee9b8eae | 9536 | if ( k != REF || OP(o) < NREF) { |
502c6561 | 9537 | AV *list= MUTABLE_AV(progi->data->data[progi->name_list_idx]); |
ee9b8eae YO |
9538 | SV **name= av_fetch(list, ARG(o), 0 ); |
9539 | if (name) | |
9540 | Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name)); | |
9541 | } | |
9542 | else { | |
502c6561 | 9543 | AV *list= MUTABLE_AV(progi->data->data[ progi->name_list_idx ]); |
ad64d0ec | 9544 | SV *sv_dat= MUTABLE_SV(progi->data->data[ ARG( o ) ]); |
ee9b8eae YO |
9545 | I32 *nums=(I32*)SvPVX(sv_dat); |
9546 | SV **name= av_fetch(list, nums[0], 0 ); | |
9547 | I32 n; | |
9548 | if (name) { | |
9549 | for ( n=0; n<SvIVX(sv_dat); n++ ) { | |
9550 | Perl_sv_catpvf(aTHX_ sv, "%s%"IVdf, | |
9551 | (n ? "," : ""), (IV)nums[n]); | |
9552 | } | |
9553 | Perl_sv_catpvf(aTHX_ sv, " '%"SVf"'", SVfARG(*name)); | |
1f1031fe | 9554 | } |
1f1031fe | 9555 | } |
ee9b8eae | 9556 | } |
1f1031fe | 9557 | } else if (k == GOSUB) |
6bda09f9 | 9558 | Perl_sv_catpvf(aTHX_ sv, "%d[%+d]", (int)ARG(o),(int)ARG2L(o)); /* Paren and offset */ |
e2e6a0f1 YO |
9559 | else if (k == VERB) { |
9560 | if (!o->flags) | |
9561 | Perl_sv_catpvf(aTHX_ sv, ":%"SVf, | |
ad64d0ec | 9562 | SVfARG((MUTABLE_SV(progi->data->data[ ARG( o ) ])))); |
e2e6a0f1 | 9563 | } else if (k == LOGICAL) |
04ebc1ab | 9564 | Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */ |
f9a79580 | 9565 | else if (k == FOLDCHAR) |
df44d732 | 9566 | Perl_sv_catpvf(aTHX_ sv, "[0x%"UVXf"]", PTR2UV(ARG(o)) ); |
653099ff GS |
9567 | else if (k == ANYOF) { |
9568 | int i, rangestart = -1; | |
2d03de9c | 9569 | const U8 flags = ANYOF_FLAGS(o); |
24d786f4 | 9570 | int do_sep = 0; |
0bd48802 AL |
9571 | |
9572 | /* Should be synchronized with * ANYOF_ #xdefines in regcomp.h */ | |
9573 | static const char * const anyofs[] = { | |
653099ff GS |
9574 | "\\w", |
9575 | "\\W", | |
9576 | "\\s", | |
9577 | "\\S", | |
9578 | "\\d", | |
9579 | "\\D", | |
9580 | "[:alnum:]", | |
9581 | "[:^alnum:]", | |
9582 | "[:alpha:]", | |
9583 | "[:^alpha:]", | |
9584 | "[:ascii:]", | |
9585 | "[:^ascii:]", | |
24d786f4 YO |
9586 | "[:cntrl:]", |
9587 | "[:^cntrl:]", | |
653099ff GS |
9588 | "[:graph:]", |
9589 | "[:^graph:]", | |
9590 | "[:lower:]", | |
9591 | "[:^lower:]", | |
9592 | "[:print:]", | |
9593 | "[:^print:]", | |
9594 | "[:punct:]", | |
9595 | "[:^punct:]", | |
9596 | "[:upper:]", | |
aaa51d5e | 9597 | "[:^upper:]", |
653099ff | 9598 | "[:xdigit:]", |
aaa51d5e JF |
9599 | "[:^xdigit:]", |
9600 | "[:space:]", | |
9601 | "[:^space:]", | |
9602 | "[:blank:]", | |
9603 | "[:^blank:]" | |
653099ff GS |
9604 | }; |
9605 | ||
19860706 | 9606 | if (flags & ANYOF_LOCALE) |
396482e1 | 9607 | sv_catpvs(sv, "{loc}"); |
19860706 | 9608 | if (flags & ANYOF_FOLD) |
396482e1 | 9609 | sv_catpvs(sv, "{i}"); |
653099ff | 9610 | Perl_sv_catpvf(aTHX_ sv, "[%s", PL_colors[0]); |
19860706 | 9611 | if (flags & ANYOF_INVERT) |
396482e1 | 9612 | sv_catpvs(sv, "^"); |
3339dfd8 YO |
9613 | |
9614 | /* output what the standard cp 0-255 bitmap matches */ | |
ffc61ed2 JH |
9615 | for (i = 0; i <= 256; i++) { |
9616 | if (i < 256 && ANYOF_BITMAP_TEST(o,i)) { | |
9617 | if (rangestart == -1) | |
9618 | rangestart = i; | |
9619 | } else if (rangestart != -1) { | |
9620 | if (i <= rangestart + 3) | |
9621 | for (; rangestart < i; rangestart++) | |
653099ff | 9622 | put_byte(sv, rangestart); |
ffc61ed2 JH |
9623 | else { |
9624 | put_byte(sv, rangestart); | |
396482e1 | 9625 | sv_catpvs(sv, "-"); |
ffc61ed2 | 9626 | put_byte(sv, i - 1); |
653099ff | 9627 | } |
24d786f4 | 9628 | do_sep = 1; |
ffc61ed2 | 9629 | rangestart = -1; |
653099ff | 9630 | } |
847a199f | 9631 | } |
3339dfd8 YO |
9632 | |
9633 | EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags); | |
9634 | /* output any special charclass tests (used mostly under use locale) */ | |
cefafd73 | 9635 | if (o->flags & ANYOF_CLASS && ANYOF_CLASS_TEST_ANY_SET(o)) |
bb7a0f54 | 9636 | for (i = 0; i < (int)(sizeof(anyofs)/sizeof(char*)); i++) |
24d786f4 | 9637 | if (ANYOF_CLASS_TEST(o,i)) { |
ffc61ed2 | 9638 | sv_catpv(sv, anyofs[i]); |
24d786f4 YO |
9639 | do_sep = 1; |
9640 | } | |
9641 | ||
3339dfd8 YO |
9642 | EMIT_ANYOF_TEST_SEPARATOR(do_sep,sv,flags); |
9643 | ||
9644 | /* output information about the unicode matching */ | |
ef87b810 | 9645 | if (flags & ANYOF_UNICODE_ALL) |
396482e1 | 9646 | sv_catpvs(sv, "{unicode_all}"); |
ef87b810 KW |
9647 | else if (flags & ANYOF_UTF8) |
9648 | sv_catpvs(sv, "{unicode}"); | |
9649 | else if (flags & ANYOF_NONBITMAP) | |
9650 | sv_catpvs(sv, "{outside bitmap}"); | |
ffc61ed2 JH |
9651 | |
9652 | { | |
9653 | SV *lv; | |
32fc9b6a | 9654 | SV * const sw = regclass_swash(prog, o, FALSE, &lv, 0); |
b81d288d | 9655 | |
ffc61ed2 JH |
9656 | if (lv) { |
9657 | if (sw) { | |
89ebb4a3 | 9658 | U8 s[UTF8_MAXBYTES_CASE+1]; |
24d786f4 | 9659 | |
ffc61ed2 | 9660 | for (i = 0; i <= 256; i++) { /* just the first 256 */ |
1df70142 | 9661 | uvchr_to_utf8(s, i); |
ffc61ed2 | 9662 | |
3568d838 | 9663 | if (i < 256 && swash_fetch(sw, s, TRUE)) { |
ffc61ed2 JH |
9664 | if (rangestart == -1) |
9665 | rangestart = i; | |
9666 | } else if (rangestart != -1) { | |
ffc61ed2 JH |
9667 | if (i <= rangestart + 3) |
9668 | for (; rangestart < i; rangestart++) { | |
2d03de9c AL |
9669 | const U8 * const e = uvchr_to_utf8(s,rangestart); |
9670 | U8 *p; | |
9671 | for(p = s; p < e; p++) | |
ffc61ed2 JH |
9672 | put_byte(sv, *p); |
9673 | } | |
9674 | else { | |
2d03de9c AL |
9675 | const U8 *e = uvchr_to_utf8(s,rangestart); |
9676 | U8 *p; | |
9677 | for (p = s; p < e; p++) | |
ffc61ed2 | 9678 | put_byte(sv, *p); |
396482e1 | 9679 | sv_catpvs(sv, "-"); |
2d03de9c AL |
9680 | e = uvchr_to_utf8(s, i-1); |
9681 | for (p = s; p < e; p++) | |
1df70142 | 9682 | put_byte(sv, *p); |
ffc61ed2 JH |
9683 | } |
9684 | rangestart = -1; | |
9685 | } | |
19860706 | 9686 | } |
ffc61ed2 | 9687 | |
396482e1 | 9688 | sv_catpvs(sv, "..."); /* et cetera */ |
19860706 | 9689 | } |
fde631ed | 9690 | |
ffc61ed2 | 9691 | { |
2e0de35c | 9692 | char *s = savesvpv(lv); |
c445ea15 | 9693 | char * const origs = s; |
b81d288d | 9694 | |
3dab1dad YO |
9695 | while (*s && *s != '\n') |
9696 | s++; | |
b81d288d | 9697 | |
ffc61ed2 | 9698 | if (*s == '\n') { |
2d03de9c | 9699 | const char * const t = ++s; |
ffc61ed2 JH |
9700 | |
9701 | while (*s) { | |
9702 | if (*s == '\n') | |
9703 | *s = ' '; | |
9704 | s++; | |
9705 | } | |
9706 | if (s[-1] == ' ') | |
9707 | s[-1] = 0; | |
9708 | ||
9709 | sv_catpv(sv, t); | |
fde631ed | 9710 | } |
b81d288d | 9711 | |
ffc61ed2 | 9712 | Safefree(origs); |
fde631ed JH |
9713 | } |
9714 | } | |
653099ff | 9715 | } |
ffc61ed2 | 9716 | |
653099ff GS |
9717 | Perl_sv_catpvf(aTHX_ sv, "%s]", PL_colors[1]); |
9718 | } | |
9b155405 | 9719 | else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH)) |
07be1b83 | 9720 | Perl_sv_catpvf(aTHX_ sv, "[%d]", -(o->flags)); |
65e66c80 | 9721 | #else |
96a5add6 | 9722 | PERL_UNUSED_CONTEXT; |
65e66c80 SP |
9723 | PERL_UNUSED_ARG(sv); |
9724 | PERL_UNUSED_ARG(o); | |
f9049ba1 | 9725 | PERL_UNUSED_ARG(prog); |
17c3b450 | 9726 | #endif /* DEBUGGING */ |
35ff7856 | 9727 | } |
a687059c | 9728 | |
cad2e5aa | 9729 | SV * |
288b8c02 | 9730 | Perl_re_intuit_string(pTHX_ REGEXP * const r) |
cad2e5aa | 9731 | { /* Assume that RE_INTUIT is set */ |
97aff369 | 9732 | dVAR; |
288b8c02 | 9733 | struct regexp *const prog = (struct regexp *)SvANY(r); |
a3621e74 | 9734 | GET_RE_DEBUG_FLAGS_DECL; |
7918f24d NC |
9735 | |
9736 | PERL_ARGS_ASSERT_RE_INTUIT_STRING; | |
96a5add6 AL |
9737 | PERL_UNUSED_CONTEXT; |
9738 | ||
a3621e74 | 9739 | DEBUG_COMPILE_r( |
cfd0369c | 9740 | { |
2d03de9c | 9741 | const char * const s = SvPV_nolen_const(prog->check_substr |
cfd0369c | 9742 | ? prog->check_substr : prog->check_utf8); |
cad2e5aa JH |
9743 | |
9744 | if (!PL_colorset) reginitcolors(); | |
9745 | PerlIO_printf(Perl_debug_log, | |
a0288114 | 9746 | "%sUsing REx %ssubstr:%s \"%s%.60s%s%s\"\n", |
33b8afdf JH |
9747 | PL_colors[4], |
9748 | prog->check_substr ? "" : "utf8 ", | |
9749 | PL_colors[5],PL_colors[0], | |
cad2e5aa JH |
9750 | s, |
9751 | PL_colors[1], | |
9752 | (strlen(s) > 60 ? "..." : "")); | |
9753 | } ); | |
9754 | ||
33b8afdf | 9755 | return prog->check_substr ? prog->check_substr : prog->check_utf8; |
cad2e5aa JH |
9756 | } |
9757 | ||
84da74a7 | 9758 | /* |
f8149455 | 9759 | pregfree() |
84da74a7 | 9760 | |
f8149455 YO |
9761 | handles refcounting and freeing the perl core regexp structure. When |
9762 | it is necessary to actually free the structure the first thing it | |
3b753521 | 9763 | does is call the 'free' method of the regexp_engine associated to |
f8149455 YO |
9764 | the regexp, allowing the handling of the void *pprivate; member |
9765 | first. (This routine is not overridable by extensions, which is why | |
9766 | the extensions free is called first.) | |
9767 | ||
9768 | See regdupe and regdupe_internal if you change anything here. | |
84da74a7 | 9769 | */ |
f8149455 | 9770 | #ifndef PERL_IN_XSUB_RE |
2b69d0c2 | 9771 | void |
84679df5 | 9772 | Perl_pregfree(pTHX_ REGEXP *r) |
a687059c | 9773 | { |
288b8c02 NC |
9774 | SvREFCNT_dec(r); |
9775 | } | |
9776 | ||
9777 | void | |
9778 | Perl_pregfree2(pTHX_ REGEXP *rx) | |
9779 | { | |
27da23d5 | 9780 | dVAR; |
288b8c02 | 9781 | struct regexp *const r = (struct regexp *)SvANY(rx); |
fc32ee4a | 9782 | GET_RE_DEBUG_FLAGS_DECL; |
a3621e74 | 9783 | |
7918f24d NC |
9784 | PERL_ARGS_ASSERT_PREGFREE2; |
9785 | ||
28d8d7f4 YO |
9786 | if (r->mother_re) { |
9787 | ReREFCNT_dec(r->mother_re); | |
9788 | } else { | |
288b8c02 | 9789 | CALLREGFREE_PVT(rx); /* free the private data */ |
ef8d46e8 | 9790 | SvREFCNT_dec(RXp_PAREN_NAMES(r)); |
28d8d7f4 YO |
9791 | } |
9792 | if (r->substrs) { | |
ef8d46e8 VP |
9793 | SvREFCNT_dec(r->anchored_substr); |
9794 | SvREFCNT_dec(r->anchored_utf8); | |
9795 | SvREFCNT_dec(r->float_substr); | |
9796 | SvREFCNT_dec(r->float_utf8); | |
28d8d7f4 YO |
9797 | Safefree(r->substrs); |
9798 | } | |
288b8c02 | 9799 | RX_MATCH_COPY_FREE(rx); |
f8c7b90f | 9800 | #ifdef PERL_OLD_COPY_ON_WRITE |
ef8d46e8 | 9801 | SvREFCNT_dec(r->saved_copy); |
ed252734 | 9802 | #endif |
f0ab9afb | 9803 | Safefree(r->offs); |
f8149455 | 9804 | } |
28d8d7f4 YO |
9805 | |
9806 | /* reg_temp_copy() | |
9807 | ||
9808 | This is a hacky workaround to the structural issue of match results | |
9809 | being stored in the regexp structure which is in turn stored in | |
9810 | PL_curpm/PL_reg_curpm. The problem is that due to qr// the pattern | |
9811 | could be PL_curpm in multiple contexts, and could require multiple | |
9812 | result sets being associated with the pattern simultaneously, such | |
9813 | as when doing a recursive match with (??{$qr}) | |
9814 | ||
9815 | The solution is to make a lightweight copy of the regexp structure | |
9816 | when a qr// is returned from the code executed by (??{$qr}) this | |
9817 | lightweight copy doesnt actually own any of its data except for | |
9818 | the starp/end and the actual regexp structure itself. | |
9819 | ||
9820 | */ | |
9821 | ||
9822 | ||
84679df5 | 9823 | REGEXP * |
f0826785 | 9824 | Perl_reg_temp_copy (pTHX_ REGEXP *ret_x, REGEXP *rx) |
7918f24d | 9825 | { |
f0826785 | 9826 | struct regexp *ret; |
288b8c02 | 9827 | struct regexp *const r = (struct regexp *)SvANY(rx); |
28d8d7f4 | 9828 | register const I32 npar = r->nparens+1; |
7918f24d NC |
9829 | |
9830 | PERL_ARGS_ASSERT_REG_TEMP_COPY; | |
9831 | ||
f0826785 BM |
9832 | if (!ret_x) |
9833 | ret_x = (REGEXP*) newSV_type(SVt_REGEXP); | |
9834 | ret = (struct regexp *)SvANY(ret_x); | |
9835 | ||
288b8c02 | 9836 | (void)ReREFCNT_inc(rx); |
f7c278bf NC |
9837 | /* We can take advantage of the existing "copied buffer" mechanism in SVs |
9838 | by pointing directly at the buffer, but flagging that the allocated | |
9839 | space in the copy is zero. As we've just done a struct copy, it's now | |
9840 | a case of zero-ing that, rather than copying the current length. */ | |
9841 | SvPV_set(ret_x, RX_WRAPPED(rx)); | |
8f6ae13c | 9842 | SvFLAGS(ret_x) |= SvFLAGS(rx) & (SVf_POK|SVp_POK|SVf_UTF8); |
b6f60916 NC |
9843 | memcpy(&(ret->xpv_cur), &(r->xpv_cur), |
9844 | sizeof(regexp) - STRUCT_OFFSET(regexp, xpv_cur)); | |
f7c278bf | 9845 | SvLEN_set(ret_x, 0); |
b9ad13ac | 9846 | SvSTASH_set(ret_x, NULL); |
703c388d | 9847 | SvMAGIC_set(ret_x, NULL); |
f0ab9afb NC |
9848 | Newx(ret->offs, npar, regexp_paren_pair); |
9849 | Copy(r->offs, ret->offs, npar, regexp_paren_pair); | |
28d8d7f4 | 9850 | if (r->substrs) { |
28d8d7f4 | 9851 | Newx(ret->substrs, 1, struct reg_substr_data); |
6ab65676 NC |
9852 | StructCopy(r->substrs, ret->substrs, struct reg_substr_data); |
9853 | ||
9854 | SvREFCNT_inc_void(ret->anchored_substr); | |
9855 | SvREFCNT_inc_void(ret->anchored_utf8); | |
9856 | SvREFCNT_inc_void(ret->float_substr); | |
9857 | SvREFCNT_inc_void(ret->float_utf8); | |
9858 | ||
9859 | /* check_substr and check_utf8, if non-NULL, point to either their | |
9860 | anchored or float namesakes, and don't hold a second reference. */ | |
486913e4 | 9861 | } |
288b8c02 | 9862 | RX_MATCH_COPIED_off(ret_x); |
28d8d7f4 | 9863 | #ifdef PERL_OLD_COPY_ON_WRITE |
b89b0c6f | 9864 | ret->saved_copy = NULL; |
28d8d7f4 | 9865 | #endif |
288b8c02 | 9866 | ret->mother_re = rx; |
28d8d7f4 | 9867 | |
288b8c02 | 9868 | return ret_x; |
28d8d7f4 | 9869 | } |
f8149455 YO |
9870 | #endif |
9871 | ||
9872 | /* regfree_internal() | |
9873 | ||
9874 | Free the private data in a regexp. This is overloadable by | |
9875 | extensions. Perl takes care of the regexp structure in pregfree(), | |
3b753521 | 9876 | this covers the *pprivate pointer which technically perl doesn't |
f8149455 YO |
9877 | know about, however of course we have to handle the |
9878 | regexp_internal structure when no extension is in use. | |
9879 | ||
9880 | Note this is called before freeing anything in the regexp | |
9881 | structure. | |
9882 | */ | |
9883 | ||
9884 | void | |
288b8c02 | 9885 | Perl_regfree_internal(pTHX_ REGEXP * const rx) |
f8149455 YO |
9886 | { |
9887 | dVAR; | |
288b8c02 | 9888 | struct regexp *const r = (struct regexp *)SvANY(rx); |
f8149455 YO |
9889 | RXi_GET_DECL(r,ri); |
9890 | GET_RE_DEBUG_FLAGS_DECL; | |
7918f24d NC |
9891 | |
9892 | PERL_ARGS_ASSERT_REGFREE_INTERNAL; | |
9893 | ||
f8149455 YO |
9894 | DEBUG_COMPILE_r({ |
9895 | if (!PL_colorset) | |
9896 | reginitcolors(); | |
9897 | { | |
9898 | SV *dsv= sv_newmortal(); | |
3c8556c3 | 9899 | RE_PV_QUOTED_DECL(s, RX_UTF8(rx), |
5509d87a | 9900 | dsv, RX_PRECOMP(rx), RX_PRELEN(rx), 60); |
f8149455 YO |
9901 | PerlIO_printf(Perl_debug_log,"%sFreeing REx:%s %s\n", |
9902 | PL_colors[4],PL_colors[5],s); | |
9903 | } | |
9904 | }); | |
7122b237 YO |
9905 | #ifdef RE_TRACK_PATTERN_OFFSETS |
9906 | if (ri->u.offsets) | |
9907 | Safefree(ri->u.offsets); /* 20010421 MJD */ | |
9908 | #endif | |
f8fc2ecf YO |
9909 | if (ri->data) { |
9910 | int n = ri->data->count; | |
f3548bdc DM |
9911 | PAD* new_comppad = NULL; |
9912 | PAD* old_comppad; | |
4026c95a | 9913 | PADOFFSET refcnt; |
dfad63ad | 9914 | |
c277df42 | 9915 | while (--n >= 0) { |
261faec3 | 9916 | /* If you add a ->what type here, update the comment in regcomp.h */ |
f8fc2ecf | 9917 | switch (ri->data->what[n]) { |
af534a04 | 9918 | case 'a': |
c277df42 | 9919 | case 's': |
81714fb9 | 9920 | case 'S': |
55eed653 | 9921 | case 'u': |
ad64d0ec | 9922 | SvREFCNT_dec(MUTABLE_SV(ri->data->data[n])); |
c277df42 | 9923 | break; |
653099ff | 9924 | case 'f': |
f8fc2ecf | 9925 | Safefree(ri->data->data[n]); |
653099ff | 9926 | break; |
dfad63ad | 9927 | case 'p': |
502c6561 | 9928 | new_comppad = MUTABLE_AV(ri->data->data[n]); |
dfad63ad | 9929 | break; |
c277df42 | 9930 | case 'o': |
dfad63ad | 9931 | if (new_comppad == NULL) |
cea2e8a9 | 9932 | Perl_croak(aTHX_ "panic: pregfree comppad"); |
f3548bdc DM |
9933 | PAD_SAVE_LOCAL(old_comppad, |
9934 | /* Watch out for global destruction's random ordering. */ | |
c445ea15 | 9935 | (SvTYPE(new_comppad) == SVt_PVAV) ? new_comppad : NULL |
f3548bdc | 9936 | ); |
b34c0dd4 | 9937 | OP_REFCNT_LOCK; |
f8fc2ecf | 9938 | refcnt = OpREFCNT_dec((OP_4tree*)ri->data->data[n]); |
4026c95a SH |
9939 | OP_REFCNT_UNLOCK; |
9940 | if (!refcnt) | |
f8fc2ecf | 9941 | op_free((OP_4tree*)ri->data->data[n]); |
9b978d73 | 9942 | |
f3548bdc | 9943 | PAD_RESTORE_LOCAL(old_comppad); |
ad64d0ec | 9944 | SvREFCNT_dec(MUTABLE_SV(new_comppad)); |
dfad63ad | 9945 | new_comppad = NULL; |
c277df42 IZ |
9946 | break; |
9947 | case 'n': | |
9e55ce06 | 9948 | break; |
07be1b83 | 9949 | case 'T': |
be8e71aa YO |
9950 | { /* Aho Corasick add-on structure for a trie node. |
9951 | Used in stclass optimization only */ | |
07be1b83 | 9952 | U32 refcount; |
f8fc2ecf | 9953 | reg_ac_data *aho=(reg_ac_data*)ri->data->data[n]; |
07be1b83 YO |
9954 | OP_REFCNT_LOCK; |
9955 | refcount = --aho->refcount; | |
9956 | OP_REFCNT_UNLOCK; | |
9957 | if ( !refcount ) { | |
446bd890 NC |
9958 | PerlMemShared_free(aho->states); |
9959 | PerlMemShared_free(aho->fail); | |
446bd890 NC |
9960 | /* do this last!!!! */ |
9961 | PerlMemShared_free(ri->data->data[n]); | |
9962 | PerlMemShared_free(ri->regstclass); | |
07be1b83 YO |
9963 | } |
9964 | } | |
9965 | break; | |
a3621e74 | 9966 | case 't': |
07be1b83 | 9967 | { |
be8e71aa | 9968 | /* trie structure. */ |
07be1b83 | 9969 | U32 refcount; |
f8fc2ecf | 9970 | reg_trie_data *trie=(reg_trie_data*)ri->data->data[n]; |
07be1b83 YO |
9971 | OP_REFCNT_LOCK; |
9972 | refcount = --trie->refcount; | |
9973 | OP_REFCNT_UNLOCK; | |
9974 | if ( !refcount ) { | |
446bd890 | 9975 | PerlMemShared_free(trie->charmap); |
446bd890 NC |
9976 | PerlMemShared_free(trie->states); |
9977 | PerlMemShared_free(trie->trans); | |
07be1b83 | 9978 | if (trie->bitmap) |
446bd890 | 9979 | PerlMemShared_free(trie->bitmap); |
786e8c11 | 9980 | if (trie->jump) |
446bd890 | 9981 | PerlMemShared_free(trie->jump); |
2e64971a | 9982 | PerlMemShared_free(trie->wordinfo); |
446bd890 NC |
9983 | /* do this last!!!! */ |
9984 | PerlMemShared_free(ri->data->data[n]); | |
a3621e74 | 9985 | } |
07be1b83 YO |
9986 | } |
9987 | break; | |
c277df42 | 9988 | default: |
f8fc2ecf | 9989 | Perl_croak(aTHX_ "panic: regfree data code '%c'", ri->data->what[n]); |
c277df42 IZ |
9990 | } |
9991 | } | |
f8fc2ecf YO |
9992 | Safefree(ri->data->what); |
9993 | Safefree(ri->data); | |
a0d0e21e | 9994 | } |
28d8d7f4 | 9995 | |
f8fc2ecf | 9996 | Safefree(ri); |
a687059c | 9997 | } |
c277df42 | 9998 | |
a09252eb NC |
9999 | #define av_dup_inc(s,t) MUTABLE_AV(sv_dup_inc((const SV *)s,t)) |
10000 | #define hv_dup_inc(s,t) MUTABLE_HV(sv_dup_inc((const SV *)s,t)) | |
84da74a7 YO |
10001 | #define SAVEPVN(p,n) ((p) ? savepvn(p,n) : NULL) |
10002 | ||
10003 | /* | |
32cd70f6 | 10004 | re_dup - duplicate a regexp. |
84da74a7 | 10005 | |
8233f606 DM |
10006 | This routine is expected to clone a given regexp structure. It is only |
10007 | compiled under USE_ITHREADS. | |
32cd70f6 | 10008 | |
f8149455 YO |
10009 | After all of the core data stored in struct regexp is duplicated |
10010 | the regexp_engine.dupe method is used to copy any private data | |
10011 | stored in the *pprivate pointer. This allows extensions to handle | |
10012 | any duplication it needs to do. | |
10013 | ||
10014 | See pregfree() and regfree_internal() if you change anything here. | |
84da74a7 | 10015 | */ |
a3c0e9ca | 10016 | #if defined(USE_ITHREADS) |
f8149455 | 10017 | #ifndef PERL_IN_XSUB_RE |
288b8c02 NC |
10018 | void |
10019 | Perl_re_dup_guts(pTHX_ const REGEXP *sstr, REGEXP *dstr, CLONE_PARAMS *param) | |
84da74a7 | 10020 | { |
84da74a7 | 10021 | dVAR; |
a86a1ca7 | 10022 | I32 npar; |
288b8c02 NC |
10023 | const struct regexp *r = (const struct regexp *)SvANY(sstr); |
10024 | struct regexp *ret = (struct regexp *)SvANY(dstr); | |
f8149455 | 10025 | |
7918f24d NC |
10026 | PERL_ARGS_ASSERT_RE_DUP_GUTS; |
10027 | ||
84da74a7 | 10028 | npar = r->nparens+1; |
f0ab9afb NC |
10029 | Newx(ret->offs, npar, regexp_paren_pair); |
10030 | Copy(r->offs, ret->offs, npar, regexp_paren_pair); | |
6057429f | 10031 | if(ret->swap) { |
28d8d7f4 | 10032 | /* no need to copy these */ |
f0ab9afb | 10033 | Newx(ret->swap, npar, regexp_paren_pair); |
28d8d7f4 | 10034 | } |
84da74a7 | 10035 | |
6057429f | 10036 | if (ret->substrs) { |
32cd70f6 NC |
10037 | /* Do it this way to avoid reading from *r after the StructCopy(). |
10038 | That way, if any of the sv_dup_inc()s dislodge *r from the L1 | |
10039 | cache, it doesn't matter. */ | |
66b1de87 NC |
10040 | const bool anchored = r->check_substr |
10041 | ? r->check_substr == r->anchored_substr | |
10042 | : r->check_utf8 == r->anchored_utf8; | |
785a26d5 | 10043 | Newx(ret->substrs, 1, struct reg_substr_data); |
a86a1ca7 NC |
10044 | StructCopy(r->substrs, ret->substrs, struct reg_substr_data); |
10045 | ||
32cd70f6 NC |
10046 | ret->anchored_substr = sv_dup_inc(ret->anchored_substr, param); |
10047 | ret->anchored_utf8 = sv_dup_inc(ret->anchored_utf8, param); | |
10048 | ret->float_substr = sv_dup_inc(ret->float_substr, param); | |
10049 | ret->float_utf8 = sv_dup_inc(ret->float_utf8, param); | |
a86a1ca7 | 10050 | |
32cd70f6 NC |
10051 | /* check_substr and check_utf8, if non-NULL, point to either their |
10052 | anchored or float namesakes, and don't hold a second reference. */ | |
10053 | ||
10054 | if (ret->check_substr) { | |
10055 | if (anchored) { | |
10056 | assert(r->check_utf8 == r->anchored_utf8); | |
10057 | ret->check_substr = ret->anchored_substr; | |
10058 | ret->check_utf8 = ret->anchored_utf8; | |
10059 | } else { | |
10060 | assert(r->check_substr == r->float_substr); | |
10061 | assert(r->check_utf8 == r->float_utf8); | |
10062 | ret->check_substr = ret->float_substr; | |
10063 | ret->check_utf8 = ret->float_utf8; | |
10064 | } | |
66b1de87 NC |
10065 | } else if (ret->check_utf8) { |
10066 | if (anchored) { | |
10067 | ret->check_utf8 = ret->anchored_utf8; | |
10068 | } else { | |
10069 | ret->check_utf8 = ret->float_utf8; | |
10070 | } | |
32cd70f6 | 10071 | } |
6057429f | 10072 | } |
f8149455 | 10073 | |
5daac39c | 10074 | RXp_PAREN_NAMES(ret) = hv_dup_inc(RXp_PAREN_NAMES(ret), param); |
bcdf7404 | 10075 | |
6057429f | 10076 | if (ret->pprivate) |
288b8c02 | 10077 | RXi_SET(ret,CALLREGDUPE_PVT(dstr,param)); |
f8149455 | 10078 | |
288b8c02 | 10079 | if (RX_MATCH_COPIED(dstr)) |
6057429f | 10080 | ret->subbeg = SAVEPVN(ret->subbeg, ret->sublen); |
f8149455 YO |
10081 | else |
10082 | ret->subbeg = NULL; | |
10083 | #ifdef PERL_OLD_COPY_ON_WRITE | |
10084 | ret->saved_copy = NULL; | |
10085 | #endif | |
6057429f | 10086 | |
c2123ae3 NC |
10087 | if (ret->mother_re) { |
10088 | if (SvPVX_const(dstr) == SvPVX_const(ret->mother_re)) { | |
10089 | /* Our storage points directly to our mother regexp, but that's | |
10090 | 1: a buffer in a different thread | |
10091 | 2: something we no longer hold a reference on | |
10092 | so we need to copy it locally. */ | |
10093 | /* Note we need to sue SvCUR() on our mother_re, because it, in | |
10094 | turn, may well be pointing to its own mother_re. */ | |
10095 | SvPV_set(dstr, SAVEPVN(SvPVX_const(ret->mother_re), | |
10096 | SvCUR(ret->mother_re)+1)); | |
10097 | SvLEN_set(dstr, SvCUR(ret->mother_re)+1); | |
10098 | } | |
10099 | ret->mother_re = NULL; | |
10100 | } | |
6057429f | 10101 | ret->gofs = 0; |
f8149455 YO |
10102 | } |
10103 | #endif /* PERL_IN_XSUB_RE */ | |
10104 | ||
10105 | /* | |
10106 | regdupe_internal() | |
10107 | ||
10108 | This is the internal complement to regdupe() which is used to copy | |
10109 | the structure pointed to by the *pprivate pointer in the regexp. | |
10110 | This is the core version of the extension overridable cloning hook. | |
10111 | The regexp structure being duplicated will be copied by perl prior | |
10112 | to this and will be provided as the regexp *r argument, however | |
10113 | with the /old/ structures pprivate pointer value. Thus this routine | |
10114 | may override any copying normally done by perl. | |
10115 | ||
10116 | It returns a pointer to the new regexp_internal structure. | |
10117 | */ | |
10118 | ||
10119 | void * | |
288b8c02 | 10120 | Perl_regdupe_internal(pTHX_ REGEXP * const rx, CLONE_PARAMS *param) |
f8149455 YO |
10121 | { |
10122 | dVAR; | |
288b8c02 | 10123 | struct regexp *const r = (struct regexp *)SvANY(rx); |
f8149455 YO |
10124 | regexp_internal *reti; |
10125 | int len, npar; | |
10126 | RXi_GET_DECL(r,ri); | |
7918f24d NC |
10127 | |
10128 | PERL_ARGS_ASSERT_REGDUPE_INTERNAL; | |
f8149455 YO |
10129 | |
10130 | npar = r->nparens+1; | |
7122b237 | 10131 | len = ProgLen(ri); |
f8149455 | 10132 | |
45cf4570 | 10133 | Newxc(reti, sizeof(regexp_internal) + len*sizeof(regnode), char, regexp_internal); |
f8149455 YO |
10134 | Copy(ri->program, reti->program, len+1, regnode); |
10135 | ||
f8149455 | 10136 | |
f8fc2ecf | 10137 | reti->regstclass = NULL; |
bcdf7404 | 10138 | |
f8fc2ecf | 10139 | if (ri->data) { |
84da74a7 | 10140 | struct reg_data *d; |
f8fc2ecf | 10141 | const int count = ri->data->count; |
84da74a7 YO |
10142 | int i; |
10143 | ||
10144 | Newxc(d, sizeof(struct reg_data) + count*sizeof(void *), | |
10145 | char, struct reg_data); | |
10146 | Newx(d->what, count, U8); | |
10147 | ||
10148 | d->count = count; | |
10149 | for (i = 0; i < count; i++) { | |
f8fc2ecf | 10150 | d->what[i] = ri->data->what[i]; |
84da74a7 | 10151 | switch (d->what[i]) { |
af534a04 | 10152 | /* legal options are one of: sSfpontTua |
84da74a7 | 10153 | see also regcomp.h and pregfree() */ |
af534a04 | 10154 | case 'a': /* actually an AV, but the dup function is identical. */ |
84da74a7 | 10155 | case 's': |
81714fb9 | 10156 | case 'S': |
0536c0a7 | 10157 | case 'p': /* actually an AV, but the dup function is identical. */ |
55eed653 | 10158 | case 'u': /* actually an HV, but the dup function is identical. */ |
ad64d0ec | 10159 | d->data[i] = sv_dup_inc((const SV *)ri->data->data[i], param); |
84da74a7 | 10160 | break; |
84da74a7 YO |
10161 | case 'f': |
10162 | /* This is cheating. */ | |
10163 | Newx(d->data[i], 1, struct regnode_charclass_class); | |
f8fc2ecf | 10164 | StructCopy(ri->data->data[i], d->data[i], |
84da74a7 | 10165 | struct regnode_charclass_class); |
f8fc2ecf | 10166 | reti->regstclass = (regnode*)d->data[i]; |
84da74a7 YO |
10167 | break; |
10168 | case 'o': | |
bbe252da YO |
10169 | /* Compiled op trees are readonly and in shared memory, |
10170 | and can thus be shared without duplication. */ | |
84da74a7 | 10171 | OP_REFCNT_LOCK; |
f8fc2ecf | 10172 | d->data[i] = (void*)OpREFCNT_inc((OP*)ri->data->data[i]); |
84da74a7 YO |
10173 | OP_REFCNT_UNLOCK; |
10174 | break; | |
23eab42c NC |
10175 | case 'T': |
10176 | /* Trie stclasses are readonly and can thus be shared | |
10177 | * without duplication. We free the stclass in pregfree | |
10178 | * when the corresponding reg_ac_data struct is freed. | |
10179 | */ | |
10180 | reti->regstclass= ri->regstclass; | |
10181 | /* Fall through */ | |
84da74a7 | 10182 | case 't': |
84da74a7 | 10183 | OP_REFCNT_LOCK; |
0536c0a7 | 10184 | ((reg_trie_data*)ri->data->data[i])->refcount++; |
84da74a7 | 10185 | OP_REFCNT_UNLOCK; |
0536c0a7 NC |
10186 | /* Fall through */ |
10187 | case 'n': | |
10188 | d->data[i] = ri->data->data[i]; | |
84da74a7 | 10189 | break; |
84da74a7 | 10190 | default: |
f8fc2ecf | 10191 | Perl_croak(aTHX_ "panic: re_dup unknown data code '%c'", ri->data->what[i]); |
84da74a7 YO |
10192 | } |
10193 | } | |
10194 | ||
f8fc2ecf | 10195 | reti->data = d; |
84da74a7 YO |
10196 | } |
10197 | else | |
f8fc2ecf | 10198 | reti->data = NULL; |
84da74a7 | 10199 | |
cde0cee5 YO |
10200 | reti->name_list_idx = ri->name_list_idx; |
10201 | ||
7122b237 YO |
10202 | #ifdef RE_TRACK_PATTERN_OFFSETS |
10203 | if (ri->u.offsets) { | |
10204 | Newx(reti->u.offsets, 2*len+1, U32); | |
10205 | Copy(ri->u.offsets, reti->u.offsets, 2*len+1, U32); | |
10206 | } | |
10207 | #else | |
10208 | SetProgLen(reti,len); | |
10209 | #endif | |
10210 | ||
f8149455 | 10211 | return (void*)reti; |
84da74a7 | 10212 | } |
f8149455 YO |
10213 | |
10214 | #endif /* USE_ITHREADS */ | |
84da74a7 | 10215 | |
f8149455 | 10216 | #ifndef PERL_IN_XSUB_RE |
bcdf7404 | 10217 | |
c277df42 IZ |
10218 | /* |
10219 | - regnext - dig the "next" pointer out of a node | |
c277df42 IZ |
10220 | */ |
10221 | regnode * | |
864dbfa3 | 10222 | Perl_regnext(pTHX_ register regnode *p) |
c277df42 | 10223 | { |
97aff369 | 10224 | dVAR; |
c277df42 IZ |
10225 | register I32 offset; |
10226 | ||
f8fc2ecf | 10227 | if (!p) |
c277df42 IZ |
10228 | return(NULL); |
10229 | ||
35db910f KW |
10230 | if (OP(p) > REGNODE_MAX) { /* regnode.type is unsigned */ |
10231 | Perl_croak(aTHX_ "Corrupted regexp opcode %d > %d", (int)OP(p), (int)REGNODE_MAX); | |
10232 | } | |
10233 | ||
c277df42 IZ |
10234 | offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p)); |
10235 | if (offset == 0) | |
10236 | return(NULL); | |
10237 | ||
c277df42 | 10238 | return(p+offset); |
c277df42 | 10239 | } |
76234dfb | 10240 | #endif |
c277df42 | 10241 | |
01f988be | 10242 | STATIC void |
cea2e8a9 | 10243 | S_re_croak2(pTHX_ const char* pat1,const char* pat2,...) |
c277df42 IZ |
10244 | { |
10245 | va_list args; | |
10246 | STRLEN l1 = strlen(pat1); | |
10247 | STRLEN l2 = strlen(pat2); | |
10248 | char buf[512]; | |
06bf62c7 | 10249 | SV *msv; |
73d840c0 | 10250 | const char *message; |
c277df42 | 10251 | |
7918f24d NC |
10252 | PERL_ARGS_ASSERT_RE_CROAK2; |
10253 | ||
c277df42 IZ |
10254 | if (l1 > 510) |
10255 | l1 = 510; | |
10256 | if (l1 + l2 > 510) | |
10257 | l2 = 510 - l1; | |
10258 | Copy(pat1, buf, l1 , char); | |
10259 | Copy(pat2, buf + l1, l2 , char); | |
3b818b81 GS |
10260 | buf[l1 + l2] = '\n'; |
10261 | buf[l1 + l2 + 1] = '\0'; | |
8736538c AS |
10262 | #ifdef I_STDARG |
10263 | /* ANSI variant takes additional second argument */ | |
c277df42 | 10264 | va_start(args, pat2); |
8736538c AS |
10265 | #else |
10266 | va_start(args); | |
10267 | #endif | |
5a844595 | 10268 | msv = vmess(buf, &args); |
c277df42 | 10269 | va_end(args); |
cfd0369c | 10270 | message = SvPV_const(msv,l1); |
c277df42 IZ |
10271 | if (l1 > 512) |
10272 | l1 = 512; | |
10273 | Copy(message, buf, l1 , char); | |
197cf9b9 | 10274 | buf[l1-1] = '\0'; /* Overwrite \n */ |
cea2e8a9 | 10275 | Perl_croak(aTHX_ "%s", buf); |
c277df42 | 10276 | } |
a0ed51b3 LW |
10277 | |
10278 | /* XXX Here's a total kludge. But we need to re-enter for swash routines. */ | |
10279 | ||
76234dfb | 10280 | #ifndef PERL_IN_XSUB_RE |
a0ed51b3 | 10281 | void |
864dbfa3 | 10282 | Perl_save_re_context(pTHX) |
b81d288d | 10283 | { |
97aff369 | 10284 | dVAR; |
1ade1aa1 NC |
10285 | |
10286 | struct re_save_state *state; | |
10287 | ||
10288 | SAVEVPTR(PL_curcop); | |
10289 | SSGROW(SAVESTACK_ALLOC_FOR_RE_SAVE_STATE + 1); | |
10290 | ||
10291 | state = (struct re_save_state *)(PL_savestack + PL_savestack_ix); | |
10292 | PL_savestack_ix += SAVESTACK_ALLOC_FOR_RE_SAVE_STATE; | |
c6bf6a65 | 10293 | SSPUSHUV(SAVEt_RE_STATE); |
1ade1aa1 | 10294 | |
46ab3289 | 10295 | Copy(&PL_reg_state, state, 1, struct re_save_state); |
1ade1aa1 | 10296 | |
a0ed51b3 | 10297 | PL_reg_start_tmp = 0; |
a0ed51b3 | 10298 | PL_reg_start_tmpl = 0; |
c445ea15 | 10299 | PL_reg_oldsaved = NULL; |
a5db57d6 | 10300 | PL_reg_oldsavedlen = 0; |
a5db57d6 | 10301 | PL_reg_maxiter = 0; |
a5db57d6 | 10302 | PL_reg_leftiter = 0; |
c445ea15 | 10303 | PL_reg_poscache = NULL; |
a5db57d6 | 10304 | PL_reg_poscache_size = 0; |
1ade1aa1 NC |
10305 | #ifdef PERL_OLD_COPY_ON_WRITE |
10306 | PL_nrs = NULL; | |
10307 | #endif | |
ada6e8a9 | 10308 | |
c445ea15 AL |
10309 | /* Save $1..$n (#18107: UTF-8 s/(\w+)/uc($1)/e); AMS 20021106. */ |
10310 | if (PL_curpm) { | |
10311 | const REGEXP * const rx = PM_GETRE(PL_curpm); | |
10312 | if (rx) { | |
1df70142 | 10313 | U32 i; |
07bc277f | 10314 | for (i = 1; i <= RX_NPARENS(rx); i++) { |
1df70142 | 10315 | char digits[TYPE_CHARS(long)]; |
d9fad198 | 10316 | const STRLEN len = my_snprintf(digits, sizeof(digits), "%lu", (long)i); |
49f27e4b NC |
10317 | GV *const *const gvp |
10318 | = (GV**)hv_fetch(PL_defstash, digits, len, 0); | |
10319 | ||
b37c2d43 AL |
10320 | if (gvp) { |
10321 | GV * const gv = *gvp; | |
10322 | if (SvTYPE(gv) == SVt_PVGV && GvSV(gv)) | |
10323 | save_scalar(gv); | |
49f27e4b | 10324 | } |
ada6e8a9 AMS |
10325 | } |
10326 | } | |
10327 | } | |
a0ed51b3 | 10328 | } |
76234dfb | 10329 | #endif |
51371543 | 10330 | |
51371543 | 10331 | static void |
acfe0abc | 10332 | clear_re(pTHX_ void *r) |
51371543 | 10333 | { |
97aff369 | 10334 | dVAR; |
84679df5 | 10335 | ReREFCNT_dec((REGEXP *)r); |
51371543 | 10336 | } |
ffbc6a93 | 10337 | |
a28509cc AL |
10338 | #ifdef DEBUGGING |
10339 | ||
10340 | STATIC void | |
10341 | S_put_byte(pTHX_ SV *sv, int c) | |
10342 | { | |
7918f24d NC |
10343 | PERL_ARGS_ASSERT_PUT_BYTE; |
10344 | ||
7fddd944 NC |
10345 | /* Our definition of isPRINT() ignores locales, so only bytes that are |
10346 | not part of UTF-8 are considered printable. I assume that the same | |
10347 | holds for UTF-EBCDIC. | |
10348 | Also, code point 255 is not printable in either (it's E0 in EBCDIC, | |
10349 | which Wikipedia says: | |
10350 | ||
10351 | EO, or Eight Ones, is an 8-bit EBCDIC character code represented as all | |
10352 | ones (binary 1111 1111, hexadecimal FF). It is similar, but not | |
10353 | identical, to the ASCII delete (DEL) or rubout control character. | |
10354 | ) So the old condition can be simplified to !isPRINT(c) */ | |
10355 | if (!isPRINT(c)) | |
a28509cc | 10356 | Perl_sv_catpvf(aTHX_ sv, "\\%o", c); |
5e7aa789 | 10357 | else { |
88c9ea1e | 10358 | const char string = c; |
5e7aa789 NC |
10359 | if (c == '-' || c == ']' || c == '\\' || c == '^') |
10360 | sv_catpvs(sv, "\\"); | |
10361 | sv_catpvn(sv, &string, 1); | |
10362 | } | |
a28509cc AL |
10363 | } |
10364 | ||
786e8c11 | 10365 | |
3dab1dad YO |
10366 | #define CLEAR_OPTSTART \ |
10367 | if (optstart) STMT_START { \ | |
70685ca0 | 10368 | DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log, " (%"IVdf" nodes)\n", (IV)(node - optstart))); \ |
3dab1dad YO |
10369 | optstart=NULL; \ |
10370 | } STMT_END | |
10371 | ||
786e8c11 | 10372 | #define DUMPUNTIL(b,e) CLEAR_OPTSTART; node=dumpuntil(r,start,(b),(e),last,sv,indent+1,depth+1); |
3dab1dad | 10373 | |
b5a2f8d8 NC |
10374 | STATIC const regnode * |
10375 | S_dumpuntil(pTHX_ const regexp *r, const regnode *start, const regnode *node, | |
786e8c11 YO |
10376 | const regnode *last, const regnode *plast, |
10377 | SV* sv, I32 indent, U32 depth) | |
a28509cc | 10378 | { |
97aff369 | 10379 | dVAR; |
786e8c11 | 10380 | register U8 op = PSEUDO; /* Arbitrary non-END op. */ |
b5a2f8d8 | 10381 | register const regnode *next; |
3dab1dad | 10382 | const regnode *optstart= NULL; |
1f1031fe | 10383 | |
f8fc2ecf | 10384 | RXi_GET_DECL(r,ri); |
3dab1dad | 10385 | GET_RE_DEBUG_FLAGS_DECL; |
7918f24d NC |
10386 | |
10387 | PERL_ARGS_ASSERT_DUMPUNTIL; | |
10388 | ||
786e8c11 YO |
10389 | #ifdef DEBUG_DUMPUNTIL |
10390 | PerlIO_printf(Perl_debug_log, "--- %d : %d - %d - %d\n",indent,node-start, | |
10391 | last ? last-start : 0,plast ? plast-start : 0); | |
10392 | #endif | |
10393 | ||
10394 | if (plast && plast < last) | |
10395 | last= plast; | |
10396 | ||
10397 | while (PL_regkind[op] != END && (!last || node < last)) { | |
a28509cc | 10398 | /* While that wasn't END last time... */ |
a28509cc AL |
10399 | NODE_ALIGN(node); |
10400 | op = OP(node); | |
de734bd5 | 10401 | if (op == CLOSE || op == WHILEM) |
786e8c11 | 10402 | indent--; |
b5a2f8d8 | 10403 | next = regnext((regnode *)node); |
1f1031fe | 10404 | |
a28509cc | 10405 | /* Where, what. */ |
8e11feef | 10406 | if (OP(node) == OPTIMIZED) { |
e68ec53f | 10407 | if (!optstart && RE_DEBUG_FLAG(RE_DEBUG_COMPILE_OPTIMISE)) |
8e11feef | 10408 | optstart = node; |
3dab1dad | 10409 | else |
8e11feef | 10410 | goto after_print; |
3dab1dad YO |
10411 | } else |
10412 | CLEAR_OPTSTART; | |
1f1031fe | 10413 | |
32fc9b6a | 10414 | regprop(r, sv, node); |
a28509cc | 10415 | PerlIO_printf(Perl_debug_log, "%4"IVdf":%*s%s", (IV)(node - start), |
786e8c11 | 10416 | (int)(2*indent + 1), "", SvPVX_const(sv)); |
1f1031fe YO |
10417 | |
10418 | if (OP(node) != OPTIMIZED) { | |
10419 | if (next == NULL) /* Next ptr. */ | |
10420 | PerlIO_printf(Perl_debug_log, " (0)"); | |
10421 | else if (PL_regkind[(U8)op] == BRANCH && PL_regkind[OP(next)] != BRANCH ) | |
10422 | PerlIO_printf(Perl_debug_log, " (FAIL)"); | |
10423 | else | |
10424 | PerlIO_printf(Perl_debug_log, " (%"IVdf")", (IV)(next - start)); | |
10425 | (void)PerlIO_putc(Perl_debug_log, '\n'); | |
10426 | } | |
10427 | ||
a28509cc AL |
10428 | after_print: |
10429 | if (PL_regkind[(U8)op] == BRANCHJ) { | |
be8e71aa YO |
10430 | assert(next); |
10431 | { | |
10432 | register const regnode *nnode = (OP(next) == LONGJMP | |
b5a2f8d8 NC |
10433 | ? regnext((regnode *)next) |
10434 | : next); | |
be8e71aa YO |
10435 | if (last && nnode > last) |
10436 | nnode = last; | |
786e8c11 | 10437 | DUMPUNTIL(NEXTOPER(NEXTOPER(node)), nnode); |
be8e71aa | 10438 | } |
a28509cc AL |
10439 | } |
10440 | else if (PL_regkind[(U8)op] == BRANCH) { | |
be8e71aa | 10441 | assert(next); |
786e8c11 | 10442 | DUMPUNTIL(NEXTOPER(node), next); |
a28509cc AL |
10443 | } |
10444 | else if ( PL_regkind[(U8)op] == TRIE ) { | |
7f69552c | 10445 | const regnode *this_trie = node; |
1de06328 | 10446 | const char op = OP(node); |
647f639f | 10447 | const U32 n = ARG(node); |
1de06328 | 10448 | const reg_ac_data * const ac = op>=AHOCORASICK ? |
f8fc2ecf | 10449 | (reg_ac_data *)ri->data->data[n] : |
1de06328 | 10450 | NULL; |
3251b653 NC |
10451 | const reg_trie_data * const trie = |
10452 | (reg_trie_data*)ri->data->data[op<AHOCORASICK ? n : ac->trie]; | |
2b8b4781 | 10453 | #ifdef DEBUGGING |
502c6561 | 10454 | AV *const trie_words = MUTABLE_AV(ri->data->data[n + TRIE_WORDS_OFFSET]); |
2b8b4781 | 10455 | #endif |
786e8c11 | 10456 | const regnode *nextbranch= NULL; |
a28509cc | 10457 | I32 word_idx; |
76f68e9b | 10458 | sv_setpvs(sv, ""); |
786e8c11 | 10459 | for (word_idx= 0; word_idx < (I32)trie->wordcount; word_idx++) { |
2b8b4781 | 10460 | SV ** const elem_ptr = av_fetch(trie_words,word_idx,0); |
786e8c11 YO |
10461 | |
10462 | PerlIO_printf(Perl_debug_log, "%*s%s ", | |
10463 | (int)(2*(indent+3)), "", | |
10464 | elem_ptr ? pv_pretty(sv, SvPV_nolen_const(*elem_ptr), SvCUR(*elem_ptr), 60, | |
ab3bbdeb YO |
10465 | PL_colors[0], PL_colors[1], |
10466 | (SvUTF8(*elem_ptr) ? PERL_PV_ESCAPE_UNI : 0) | | |
95b611b0 | 10467 | PERL_PV_PRETTY_ELLIPSES | |
7f69552c | 10468 | PERL_PV_PRETTY_LTGT |
786e8c11 YO |
10469 | ) |
10470 | : "???" | |
10471 | ); | |
10472 | if (trie->jump) { | |
40d049e4 | 10473 | U16 dist= trie->jump[word_idx+1]; |
70685ca0 JH |
10474 | PerlIO_printf(Perl_debug_log, "(%"UVuf")\n", |
10475 | (UV)((dist ? this_trie + dist : next) - start)); | |
786e8c11 YO |
10476 | if (dist) { |
10477 | if (!nextbranch) | |
24b23f37 | 10478 | nextbranch= this_trie + trie->jump[0]; |
7f69552c YO |
10479 | DUMPUNTIL(this_trie + dist, nextbranch); |
10480 | } | |
786e8c11 YO |
10481 | if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH) |
10482 | nextbranch= regnext((regnode *)nextbranch); | |
10483 | } else { | |
10484 | PerlIO_printf(Perl_debug_log, "\n"); | |
a28509cc | 10485 | } |
786e8c11 YO |
10486 | } |
10487 | if (last && next > last) | |
10488 | node= last; | |
10489 | else | |
10490 | node= next; | |
a28509cc | 10491 | } |
786e8c11 YO |
10492 | else if ( op == CURLY ) { /* "next" might be very big: optimizer */ |
10493 | DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS, | |
10494 | NEXTOPER(node) + EXTRA_STEP_2ARGS + 1); | |
a28509cc AL |
10495 | } |
10496 | else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) { | |
be8e71aa | 10497 | assert(next); |
786e8c11 | 10498 | DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS, next); |
a28509cc AL |
10499 | } |
10500 | else if ( op == PLUS || op == STAR) { | |
786e8c11 | 10501 | DUMPUNTIL(NEXTOPER(node), NEXTOPER(node) + 1); |
a28509cc AL |
10502 | } |
10503 | else if (op == ANYOF) { | |
10504 | /* arglen 1 + class block */ | |
4a3ee7a8 | 10505 | node += 1 + ((ANYOF_FLAGS(node) & ANYOF_CLASS) |
a28509cc AL |
10506 | ? ANYOF_CLASS_SKIP : ANYOF_SKIP); |
10507 | node = NEXTOPER(node); | |
10508 | } | |
10509 | else if (PL_regkind[(U8)op] == EXACT) { | |
10510 | /* Literal string, where present. */ | |
10511 | node += NODE_SZ_STR(node) - 1; | |
10512 | node = NEXTOPER(node); | |
10513 | } | |
10514 | else { | |
10515 | node = NEXTOPER(node); | |
10516 | node += regarglen[(U8)op]; | |
10517 | } | |
10518 | if (op == CURLYX || op == OPEN) | |
786e8c11 | 10519 | indent++; |
a28509cc | 10520 | } |
3dab1dad | 10521 | CLEAR_OPTSTART; |
786e8c11 | 10522 | #ifdef DEBUG_DUMPUNTIL |
70685ca0 | 10523 | PerlIO_printf(Perl_debug_log, "--- %d\n", (int)indent); |
786e8c11 | 10524 | #endif |
1de06328 | 10525 | return node; |
a28509cc AL |
10526 | } |
10527 | ||
10528 | #endif /* DEBUGGING */ | |
10529 | ||
241d1a3b NC |
10530 | /* |
10531 | * Local variables: | |
10532 | * c-indentation-style: bsd | |
10533 | * c-basic-offset: 4 | |
10534 | * indent-tabs-mode: t | |
10535 | * End: | |
10536 | * | |
37442d52 RGS |
10537 | * ex: set ts=8 sts=4 sw=4 noet: |
10538 | */ |