3 * Copyright (C) 1993, 1994, 1996, 1997, 1999, 2000, 2001, 2003,
4 * 2005, 2006, 2007, 2008 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * Definitions etc. for regexp(3) routines.
14 * Caveat: this is V8 regexp(3) [actually, a reimplementation thereof],
15 * not the System V one.
17 #ifndef PLUGGABLE_RE_EXTENSION
18 /* we don't want to include this stuff if we are inside of
19 an external regex engine based on the core one - like re 'debug'*/
27 typedef struct regnode regnode;
29 struct reg_substr_data;
36 struct reg_substr_datum {
39 SV *substr; /* non-utf8 variant */
40 SV *utf8_substr; /* utf8 variant */
43 struct reg_substr_data {
44 struct reg_substr_datum data[3]; /* Actual array */
47 #ifdef PERL_OLD_COPY_ON_WRITE
48 #define SV_SAVED_COPY SV *saved_copy; /* If non-NULL, SV which is COW from original */
53 typedef struct regexp_paren_pair {
59 The regexp/REGEXP struct, see L<perlreapi> for further documentation
60 on the individual fields. The struct is ordered so that the most
61 commonly used fields are placed at the start.
63 Any patch that adds items to this struct will need to include
64 changes to F<sv.c> (C<Perl_re_dup()>) and F<regcomp.c>
65 (C<pregfree()>). This involves freeing or cloning items in the
66 regexp's data array based on the data item's type.
69 #define _REGEXP_COMMON \
70 /* what engine created this regexp? */ \
71 const struct regexp_engine* engine; \
72 REGEXP *mother_re; /* what re is this a lightweight copy of? */ \
73 HV *paren_names; /* Optional hash of paren names */ \
74 /* Information about the match that the perl core uses to */ \
76 U32 extflags; /* Flags used both externally and internally */ \
77 I32 minlen; /* mininum possible length of string to match */\
78 I32 minlenret; /* mininum possible length of $& */ \
79 U32 gofs; /* chars left of pos that we search from */ \
80 /* substring data about strings that must appear in the */ \
81 /* final match, used for optimisations */ \
82 struct reg_substr_data *substrs; \
83 U32 nparens; /* number of capture buffers */ \
84 /* private engine specific data */ \
85 U32 intflags; /* Engine Specific Internal flags */ \
86 void *pprivate; /* Data private to the regex engine which */ \
87 /* created this object. */ \
88 /* Data about the last/current match. These are modified */ \
89 /* during matching */ \
90 U32 lastparen; /* last open paren matched */ \
91 U32 lastcloseparen; /* last close paren matched */ \
92 regexp_paren_pair *swap; /* Unused: 5.10.1 and later */ \
93 /* Array of offsets for (@-) and (@+) */ \
94 regexp_paren_pair *offs; \
95 /* saved or original string so \digit works forever. */ \
97 SV_SAVED_COPY /* If non-NULL, SV which is COW from original */\
98 I32 sublen; /* Length of string pointed by subbeg */ \
99 /* Information about the match that isn't often used */ \
100 /* offset from wrapped to the start of precomp */ \
101 PERL_BITFIELD32 pre_prefix:4; \
102 /* number of eval groups in the pattern - for security checks */\
103 PERL_BITFIELD32 seen_evals:28
105 typedef struct regexp {
110 #define RXp_PAREN_NAMES(rx) ((rx)->paren_names)
112 /* used for high speed searches */
113 typedef struct re_scream_pos_data_s
115 char **scream_olds; /* match pos */
116 I32 *scream_pos; /* Internal iterator of scream. */
117 } re_scream_pos_data;
119 /* regexp_engine structure. This is the dispatch table for regexes.
120 * Any regex engine implementation must be able to build one of these.
122 typedef struct regexp_engine {
123 REGEXP* (*comp) (pTHX_ SV * const pattern, U32 flags);
124 I32 (*exec) (pTHX_ REGEXP * const rx, char* stringarg, char* strend,
125 char* strbeg, I32 minend, SV* screamer,
126 void* data, U32 flags);
127 char* (*intuit) (pTHX_ REGEXP * const rx, SV *sv, char *strpos,
128 char *strend, const U32 flags,
129 re_scream_pos_data *data);
130 SV* (*checkstr) (pTHX_ REGEXP * const rx);
131 void (*free) (pTHX_ REGEXP * const rx);
132 void (*numbered_buff_FETCH) (pTHX_ REGEXP * const rx, const I32 paren,
134 void (*numbered_buff_STORE) (pTHX_ REGEXP * const rx, const I32 paren,
135 SV const * const value);
136 I32 (*numbered_buff_LENGTH) (pTHX_ REGEXP * const rx, const SV * const sv,
138 SV* (*named_buff) (pTHX_ REGEXP * const rx, SV * const key,
139 SV * const value, const U32 flags);
140 SV* (*named_buff_iter) (pTHX_ REGEXP * const rx, const SV * const lastkey,
142 SV* (*qr_package)(pTHX_ REGEXP * const rx);
144 void* (*dupe) (pTHX_ REGEXP * const rx, CLONE_PARAMS *param);
149 These are passed to the numbered capture variable callbacks as the
150 paren name. >= 1 is reserved for actual numbered captures, i.e. $1,
153 #define RX_BUFF_IDX_PREMATCH -2 /* $` / ${^PREMATCH} */
154 #define RX_BUFF_IDX_POSTMATCH -1 /* $' / ${^POSTMATCH} */
155 #define RX_BUFF_IDX_FULLMATCH 0 /* $& / ${^MATCH} */
158 Flags that are passed to the named_buff and named_buff_iter
159 callbacks above. Those routines are called from universal.c via the
160 Tie::Hash::NamedCapture interface for %+ and %- and the re::
161 functions in the same file.
164 /* The Tie::Hash::NamedCapture operation this is part of, if any */
165 #define RXapif_FETCH 0x0001
166 #define RXapif_STORE 0x0002
167 #define RXapif_DELETE 0x0004
168 #define RXapif_CLEAR 0x0008
169 #define RXapif_EXISTS 0x0010
170 #define RXapif_SCALAR 0x0020
171 #define RXapif_FIRSTKEY 0x0040
172 #define RXapif_NEXTKEY 0x0080
174 /* Whether %+ or %- is being operated on */
175 #define RXapif_ONE 0x0100 /* %+ */
176 #define RXapif_ALL 0x0200 /* %- */
178 /* Whether this is being called from a re:: function */
179 #define RXapif_REGNAME 0x0400
180 #define RXapif_REGNAMES 0x0800
181 #define RXapif_REGNAMES_COUNT 0x1000
184 =head1 REGEXP Functions
186 =for apidoc Am|REGEXP *|SvRX|SV *sv
188 Convenience macro to get the REGEXP from a SV. This is approximately
189 equivalent to the following snippet:
194 sv = MUTABLE_SV(SvRV(sv));
195 if (SvTYPE(sv) == SVt_REGEXP)
198 NULL will be returned if a REGEXP* is not found.
200 =for apidoc Am|bool|SvRXOK|SV* sv
202 Returns a boolean indicating whether the SV (or the one it references)
205 If you want to do something with the REGEXP* later use SvRX instead
211 #define SvRX(sv) (Perl_get_re_arg(aTHX_ sv))
212 #define SvRXOK(sv) (Perl_get_re_arg(aTHX_ sv) ? TRUE : FALSE)
215 /* Flags stored in regexp->extflags
216 * These are used by code external to the regexp engine
218 * Note that the flags whose names start with RXf_PMf_ are defined in
219 * op_reg_common.h, being copied from the parallel flags of op_pmflags
221 * NOTE: if you modify any RXf flags you should run regen.pl or
222 * regen/regcomp.pl so that regnodes.h is updated with the changes.
226 #include "op_reg_common.h"
228 #define RXf_PMf_STD_PMMOD (RXf_PMf_MULTILINE|RXf_PMf_SINGLELINE|RXf_PMf_FOLD|RXf_PMf_EXTENDED)
230 #define CASE_STD_PMMOD_FLAGS_PARSE_SET(pmfl) \
231 case IGNORE_PAT_MOD: *(pmfl) |= RXf_PMf_FOLD; break; \
232 case MULTILINE_PAT_MOD: *(pmfl) |= RXf_PMf_MULTILINE; break; \
233 case SINGLE_PAT_MOD: *(pmfl) |= RXf_PMf_SINGLELINE; break; \
234 case XTENDED_PAT_MOD: *(pmfl) |= RXf_PMf_EXTENDED; break
236 /* Note, includes locale, unicode */
237 #define STD_PMMOD_FLAGS_CLEAR(pmfl) \
238 *(pmfl) &= ~(RXf_PMf_FOLD|RXf_PMf_MULTILINE|RXf_PMf_SINGLELINE|RXf_PMf_EXTENDED|RXf_PMf_LOCALE|RXf_PMf_UNICODE)
240 /* chars and strings used as regex pattern modifiers
241 * Singlular is a 'c'har, plural is a "string"
243 * NOTE, KEEPCOPY was originally 'k', but was changed to 'p' for preserve
244 * for compatibility reasons with Regexp::Common which highjacked (?k:...)
245 * for its own uses. So 'k' is out as well.
247 #define DEFAULT_PAT_MOD '^' /* Short for all the default modifiers */
248 #define EXEC_PAT_MOD 'e'
249 #define KEEPCOPY_PAT_MOD 'p'
250 #define ONCE_PAT_MOD 'o'
251 #define GLOBAL_PAT_MOD 'g'
252 #define CONTINUE_PAT_MOD 'c'
253 #define MULTILINE_PAT_MOD 'm'
254 #define SINGLE_PAT_MOD 's'
255 #define IGNORE_PAT_MOD 'i'
256 #define XTENDED_PAT_MOD 'x'
257 #define NONDESTRUCT_PAT_MOD 'r'
258 #define LOCALE_PAT_MOD 'l'
259 #define UNICODE_PAT_MOD 'u'
260 #define DUAL_PAT_MOD 'd'
262 #define ONCE_PAT_MODS "o"
263 #define KEEPCOPY_PAT_MODS "p"
264 #define EXEC_PAT_MODS "e"
265 #define LOOP_PAT_MODS "gc"
266 #define NONDESTRUCT_PAT_MODS "r"
267 #define LOCALE_PAT_MODS "l"
268 #define UNICODE_PAT_MODS "u"
269 #define DUAL_PAT_MODS "d"
271 /* This string is expected by regcomp.c to be ordered so that the first
272 * character is the flag in bit RXf_PMf_STD_PMMOD_SHIFT of extflags; the next
273 * character is bit +1, etc. */
274 #define STD_PAT_MODS "msix"
276 /* This string is expected by XS_re_regexp_pattern() in universal.c to be ordered
277 * so that the first character is the flag in bit RXf_PMf_STD_PMMOD_SHIFT of
278 * extflags; the next character is in bit +1, etc. */
279 #define INT_PAT_MODS STD_PAT_MODS KEEPCOPY_PAT_MODS
281 #define EXT_PAT_MODS ONCE_PAT_MODS KEEPCOPY_PAT_MODS
282 #define QR_PAT_MODS STD_PAT_MODS EXT_PAT_MODS
283 #define M_PAT_MODS QR_PAT_MODS LOOP_PAT_MODS
284 #define S_PAT_MODS M_PAT_MODS EXEC_PAT_MODS NONDESTRUCT_PAT_MODS
287 * NOTE: if you modify any RXf flags you should run regen.pl or
288 * regen/regcomp.pl so that regnodes.h is updated with the changes.
292 /* Leave some space, so future bit allocations can go either in the shared or
293 * unshared area without affecting binary compatibility */
294 #define RXf_BASE_SHIFT (_RXf_PMf_SHIFT_NEXT+2)
296 /* Anchor and GPOS related stuff */
297 #define RXf_ANCH_BOL (1<<(RXf_BASE_SHIFT+0))
298 #define RXf_ANCH_MBOL (1<<(RXf_BASE_SHIFT+1))
299 #define RXf_ANCH_SBOL (1<<(RXf_BASE_SHIFT+2))
300 #define RXf_ANCH_GPOS (1<<(RXf_BASE_SHIFT+3))
301 #define RXf_GPOS_SEEN (1<<(RXf_BASE_SHIFT+4))
302 #define RXf_GPOS_FLOAT (1<<(RXf_BASE_SHIFT+5))
304 #define RXf_ANCH (RXf_ANCH_BOL|RXf_ANCH_MBOL|RXf_ANCH_GPOS|RXf_ANCH_SBOL)
305 #define RXf_GPOS_CHECK (RXf_GPOS_SEEN|RXf_ANCH_GPOS)
306 #define RXf_ANCH_SINGLE (RXf_ANCH_SBOL|RXf_ANCH_GPOS)
308 /* What we have seen */
309 #define RXf_LOOKBEHIND_SEEN (1<<(RXf_BASE_SHIFT+6))
310 #define RXf_EVAL_SEEN (1<<(RXf_BASE_SHIFT+7))
311 #define RXf_CANY_SEEN (1<<(RXf_BASE_SHIFT+8))
314 #define RXf_NOSCAN (1<<(RXf_BASE_SHIFT+9))
315 #define RXf_CHECK_ALL (1<<(RXf_BASE_SHIFT+10))
318 #define RXf_MATCH_UTF8 (1<<(RXf_BASE_SHIFT+11))
321 #define RXf_USE_INTUIT_NOML (1<<(RXf_BASE_SHIFT+12))
322 #define RXf_USE_INTUIT_ML (1<<(RXf_BASE_SHIFT+13))
323 #define RXf_INTUIT_TAIL (1<<(RXf_BASE_SHIFT+14))
326 Set in Perl_pmruntime if op_flags & OPf_SPECIAL, i.e. split. Will
327 be used by regex engines to check whether they should set
330 #define RXf_SPLIT (1<<(RXf_BASE_SHIFT+15))
332 #define RXf_USE_INTUIT (RXf_USE_INTUIT_NOML|RXf_USE_INTUIT_ML)
334 /* Copy and tainted info */
335 #define RXf_COPY_DONE (1<<(RXf_BASE_SHIFT+16))
336 #define RXf_TAINTED_SEEN (1<<(RXf_BASE_SHIFT+17))
337 #define RXf_TAINTED (1<<(RXf_BASE_SHIFT+18)) /* this pattern is tainted */
339 /* Flags indicating special patterns */
340 #define RXf_START_ONLY (1<<(RXf_BASE_SHIFT+19)) /* Pattern is /^/ */
341 #define RXf_SKIPWHITE (1<<(RXf_BASE_SHIFT+20)) /* Pattern is for a split / / */
342 #define RXf_WHITE (1<<(RXf_BASE_SHIFT+21)) /* Pattern is /\s+/ */
343 #define RXf_NULL (1<<(RXf_BASE_SHIFT+22)) /* Pattern is // */
344 #if RXf_BASE_SHIFT+22 > 31
345 # error Too many RXf_PMf bits used. See regnodes.h for any spare in middle
349 * NOTE: if you modify any RXf flags you should run regen.pl or
350 * regen/regcomp.pl so that regnodes.h is updated with the changes.
354 #define RX_HAS_CUTGROUP(prog) ((prog)->intflags & PREGf_CUTGROUP_SEEN)
355 #define RXp_MATCH_TAINTED(prog) (RXp_EXTFLAGS(prog) & RXf_TAINTED_SEEN)
356 #define RX_MATCH_TAINTED(prog) (RX_EXTFLAGS(prog) & RXf_TAINTED_SEEN)
357 #define RX_MATCH_TAINTED_on(prog) (RX_EXTFLAGS(prog) |= RXf_TAINTED_SEEN)
358 #define RX_MATCH_TAINTED_off(prog) (RX_EXTFLAGS(prog) &= ~RXf_TAINTED_SEEN)
359 #define RX_MATCH_TAINTED_set(prog, t) ((t) \
360 ? RX_MATCH_TAINTED_on(prog) \
361 : RX_MATCH_TAINTED_off(prog))
363 #define RXp_MATCH_COPIED(prog) (RXp_EXTFLAGS(prog) & RXf_COPY_DONE)
364 #define RX_MATCH_COPIED(prog) (RX_EXTFLAGS(prog) & RXf_COPY_DONE)
365 #define RXp_MATCH_COPIED_on(prog) (RXp_EXTFLAGS(prog) |= RXf_COPY_DONE)
366 #define RX_MATCH_COPIED_on(prog) (RX_EXTFLAGS(prog) |= RXf_COPY_DONE)
367 #define RXp_MATCH_COPIED_off(prog) (RXp_EXTFLAGS(prog) &= ~RXf_COPY_DONE)
368 #define RX_MATCH_COPIED_off(prog) (RX_EXTFLAGS(prog) &= ~RXf_COPY_DONE)
369 #define RX_MATCH_COPIED_set(prog,t) ((t) \
370 ? RX_MATCH_COPIED_on(prog) \
371 : RX_MATCH_COPIED_off(prog))
373 #define RXp_EXTFLAGS(rx) ((rx)->extflags)
375 /* For source compatibility. We used to store these explicitly. */
376 #define RX_PRECOMP(prog) (RX_WRAPPED(prog) + ((struct regexp *)SvANY(prog))->pre_prefix)
377 #define RX_PRECOMP_const(prog) (RX_WRAPPED_const(prog) + ((struct regexp *)SvANY(prog))->pre_prefix)
378 /* FIXME? Are we hardcoding too much here and constraining plugin extension
379 writers? Specifically, the value 1 assumes that the wrapped version always
380 has exactly one character at the end, a ')'. Will that always be true? */
381 #define RX_PRELEN(prog) (RX_WRAPLEN(prog) - ((struct regexp *)SvANY(prog))->pre_prefix - 1)
382 #define RX_WRAPPED(prog) SvPVX(prog)
383 #define RX_WRAPPED_const(prog) SvPVX_const(prog)
384 #define RX_WRAPLEN(prog) SvCUR(prog)
385 #define RX_CHECK_SUBSTR(prog) (((struct regexp *)SvANY(prog))->check_substr)
386 #define RX_REFCNT(prog) SvREFCNT(prog)
387 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
388 # define RX_EXTFLAGS(prog) \
390 const REGEXP *const _rx_extflags = (prog); \
391 assert(SvTYPE(_rx_extflags) == SVt_REGEXP); \
392 &RXp_EXTFLAGS(SvANY(_rx_extflags)); \
394 # define RX_ENGINE(prog) \
396 const REGEXP *const _rx_engine = (prog); \
397 assert(SvTYPE(_rx_engine) == SVt_REGEXP); \
398 &SvANY(_rx_engine)->engine; \
400 # define RX_SUBBEG(prog) \
402 const REGEXP *const _rx_subbeg = (prog); \
403 assert(SvTYPE(_rx_subbeg) == SVt_REGEXP); \
404 &SvANY(_rx_subbeg)->subbeg; \
406 # define RX_OFFS(prog) \
408 const REGEXP *const _rx_offs = (prog); \
409 assert(SvTYPE(_rx_offs) == SVt_REGEXP); \
410 &SvANY(_rx_offs)->offs; \
412 # define RX_NPARENS(prog) \
414 const REGEXP *const _rx_nparens = (prog); \
415 assert(SvTYPE(_rx_nparens) == SVt_REGEXP); \
416 &SvANY(_rx_nparens)->nparens; \
419 # define RX_EXTFLAGS(prog) RXp_EXTFLAGS((struct regexp *)SvANY(prog))
420 # define RX_ENGINE(prog) (((struct regexp *)SvANY(prog))->engine)
421 # define RX_SUBBEG(prog) (((struct regexp *)SvANY(prog))->subbeg)
422 # define RX_OFFS(prog) (((struct regexp *)SvANY(prog))->offs)
423 # define RX_NPARENS(prog) (((struct regexp *)SvANY(prog))->nparens)
425 #define RX_SUBLEN(prog) (((struct regexp *)SvANY(prog))->sublen)
426 #define RX_MINLEN(prog) (((struct regexp *)SvANY(prog))->minlen)
427 #define RX_MINLENRET(prog) (((struct regexp *)SvANY(prog))->minlenret)
428 #define RX_GOFS(prog) (((struct regexp *)SvANY(prog))->gofs)
429 #define RX_LASTPAREN(prog) (((struct regexp *)SvANY(prog))->lastparen)
430 #define RX_LASTCLOSEPAREN(prog) (((struct regexp *)SvANY(prog))->lastcloseparen)
431 #define RX_SEEN_EVALS(prog) (((struct regexp *)SvANY(prog))->seen_evals)
432 #define RX_SAVED_COPY(prog) (((struct regexp *)SvANY(prog))->saved_copy)
434 #endif /* PLUGGABLE_RE_EXTENSION */
436 /* Stuff that needs to be included in the plugable extension goes below here */
438 #ifdef PERL_OLD_COPY_ON_WRITE
439 #define RX_MATCH_COPY_FREE(rx) \
440 STMT_START {if (RX_SAVED_COPY(rx)) { \
441 SV_CHECK_THINKFIRST_COW_DROP(RX_SAVED_COPY(rx)); \
443 if (RX_MATCH_COPIED(rx)) { \
444 Safefree(RX_SUBBEG(rx)); \
445 RX_MATCH_COPIED_off(rx); \
448 #define RX_MATCH_COPY_FREE(rx) \
449 STMT_START {if (RX_MATCH_COPIED(rx)) { \
450 Safefree(RX_SUBBEG(rx)); \
451 RX_MATCH_COPIED_off(rx); \
455 #define RXp_MATCH_UTF8(prog) (RXp_EXTFLAGS(prog) & RXf_MATCH_UTF8)
456 #define RX_MATCH_UTF8(prog) (RX_EXTFLAGS(prog) & RXf_MATCH_UTF8)
457 #define RX_MATCH_UTF8_on(prog) (RX_EXTFLAGS(prog) |= RXf_MATCH_UTF8)
458 #define RX_MATCH_UTF8_off(prog) (RX_EXTFLAGS(prog) &= ~RXf_MATCH_UTF8)
459 #define RX_MATCH_UTF8_set(prog, t) ((t) \
460 ? (RX_MATCH_UTF8_on(prog), (PL_reg_match_utf8 = 1)) \
461 : (RX_MATCH_UTF8_off(prog), (PL_reg_match_utf8 = 0)))
463 /* Whether the pattern stored at RX_WRAPPED is in UTF-8 */
464 #define RX_UTF8(prog) SvUTF8(prog)
466 #define REXEC_COPY_STR 0x01 /* Need to copy the string. */
467 #define REXEC_CHECKED 0x02 /* check_substr already checked. */
468 #define REXEC_SCREAM 0x04 /* use scream table. */
469 #define REXEC_IGNOREPOS 0x08 /* \G matches at start. */
470 #define REXEC_NOT_FIRST 0x10 /* This is another iteration of //g. */
472 #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
473 # define ReREFCNT_inc(re) \
475 /* This is here to generate a casting warning if incorrect. */ \
476 REGEXP *const _rerefcnt_inc = (re); \
477 assert(SvTYPE(_rerefcnt_inc) == SVt_REGEXP); \
478 SvREFCNT_inc(_rerefcnt_inc); \
481 # define ReREFCNT_dec(re) \
483 /* This is here to generate a casting warning if incorrect. */ \
484 REGEXP *const _rerefcnt_dec = (re); \
485 SvREFCNT_dec(_rerefcnt_dec); \
488 # define ReREFCNT_dec(re) SvREFCNT_dec(re)
489 # define ReREFCNT_inc(re) ((REGEXP *) SvREFCNT_inc(re))
492 /* FIXME for plugins. */
494 #define FBMcf_TAIL_DOLLAR 1
495 #define FBMcf_TAIL_DOLLARM 2
496 #define FBMcf_TAIL_Z 4
497 #define FBMcf_TAIL_z 8
498 #define FBMcf_TAIL (FBMcf_TAIL_DOLLAR|FBMcf_TAIL_DOLLARM|FBMcf_TAIL_Z|FBMcf_TAIL_z)
500 #define FBMrf_MULTILINE 1
502 /* some basic information about the current match that is created by
503 * Perl_regexec_flags and then passed to regtry(), regmatch() etc */
515 /* structures for holding and saving the state maintained by regmatch() */
517 #ifndef MAX_RECURSE_EVAL_NOCHANGE_DEPTH
518 #define MAX_RECURSE_EVAL_NOCHANGE_DEPTH 1000
521 typedef I32 CHECKPOINT;
523 typedef struct regmatch_state {
524 int resume_state; /* where to jump to on return */
525 char *locinput; /* where to backtrack in string on failure */
529 /* this is a fake union member that matches the first element
530 * of each member that needs to store positive backtrack
533 struct regmatch_state *prev_yes_state;
536 /* branchlike members */
537 /* this is a fake union member that matches the first elements
538 * of each member that needs to behave like a branch */
540 /* this first element must match u.yes */
541 struct regmatch_state *prev_yes_state;
548 /* the first elements must match u.branchlike */
549 struct regmatch_state *prev_yes_state;
553 regnode *next_branch; /* next branch node */
557 /* the first elements must match u.branchlike */
558 struct regmatch_state *prev_yes_state;
562 U32 accepted; /* how many accepting states left */
563 U16 *jump; /* positive offsets from me */
564 regnode *B; /* node following the trie */
565 regnode *me; /* Which node am I - needed for jump tries*/
566 U8 *firstpos;/* pos in string of first trie match */
567 U32 firstchars;/* len in chars of firstpos from start */
568 U16 nextword;/* next word to try */
569 U16 topword; /* longest accepted word */
570 bool longfold;/* saw a fold with a 1->n char mapping */
573 /* special types - these members are used to store state for special
574 regops like eval, if/then, lookaround and the markpoint state */
576 /* this first element must match u.yes */
577 struct regmatch_state *prev_yes_state;
578 struct regmatch_state *prev_eval;
579 struct regmatch_state *prev_curlyx;
581 U32 toggle_reg_flags; /* what bits in PL_reg_flags to
582 flip when transitioning between
583 inner and outer rexen */
584 CHECKPOINT cp; /* remember current savestack indexes */
586 U32 close_paren; /* which close bracket is our end */
587 regnode *B; /* the node following us */
591 /* this first element must match u.yes */
592 struct regmatch_state *prev_yes_state;
594 I32 logical; /* saved copy of 'logical' var */
595 regnode *me; /* the IFMATCH/SUSPEND/UNLESSM node */
596 } ifmatch; /* and SUSPEND/UNLESSM */
599 /* this first element must match u.yes */
600 struct regmatch_state *prev_yes_state;
601 struct regmatch_state *prev_mark;
610 /* quantifiers - these members are used for storing state for
611 for the regops used to implement quantifiers */
613 /* this first element must match u.yes */
614 struct regmatch_state *prev_yes_state;
615 struct regmatch_state *prev_curlyx; /* previous cur_curlyx */
616 regnode *me; /* the CURLYX node */
617 regnode *B; /* the B node in /A*B/ */
618 CHECKPOINT cp; /* remember current savestack index */
620 int parenfloor;/* how far back to strip paren data */
622 /* these two are modified by WHILEM */
623 int count; /* how many instances of A we've matched */
624 char *lastloc;/* where previous A matched (0-len detect) */
628 /* this first element must match u.yes */
629 struct regmatch_state *prev_yes_state;
630 struct regmatch_state *save_curlyx;
631 CHECKPOINT cp; /* remember current savestack indexes */
633 char *save_lastloc; /* previous curlyx.lastloc */
639 /* this first element must match u.yes */
640 struct regmatch_state *prev_yes_state;
641 I32 c1, c2; /* case fold search */
643 I32 alen; /* length of first-matched A string */
646 regnode *A, *B; /* the nodes corresponding to /A*B/ */
647 regnode *me; /* the curlym node */
653 I32 c1, c2; /* case fold search */
654 char *maxpos; /* highest possible point in string to match */
655 char *oldloc; /* the previous locinput */
657 int min, max; /* {m,n} */
658 regnode *A, *B; /* the nodes corresponding to /A*B/ */
659 } curly; /* and CURLYN/PLUS/STAR */
664 /* how many regmatch_state structs to allocate as a single slab.
665 * We do it in 4K blocks for efficiency. The "3" is 2 for the next/prev
666 * pointers, plus 1 for any mythical malloc overhead. */
668 #define PERL_REGMATCH_SLAB_SLOTS \
669 ((4096 - 3 * sizeof (void*)) / sizeof(regmatch_state))
671 typedef struct regmatch_slab {
672 regmatch_state states[PERL_REGMATCH_SLAB_SLOTS];
673 struct regmatch_slab *prev, *next;
676 #define PL_reg_flags PL_reg_state.re_state_reg_flags
677 #define PL_bostr PL_reg_state.re_state_bostr
678 #define PL_reginput PL_reg_state.re_state_reginput
679 #define PL_regeol PL_reg_state.re_state_regeol
680 #define PL_regoffs PL_reg_state.re_state_regoffs
681 #define PL_reglastparen PL_reg_state.re_state_reglastparen
682 #define PL_reglastcloseparen PL_reg_state.re_state_reglastcloseparen
683 #define PL_reg_start_tmp PL_reg_state.re_state_reg_start_tmp
684 #define PL_reg_start_tmpl PL_reg_state.re_state_reg_start_tmpl
685 #define PL_reg_eval_set PL_reg_state.re_state_reg_eval_set
686 #define PL_reg_match_utf8 PL_reg_state.re_state_reg_match_utf8
687 #define PL_reg_magic PL_reg_state.re_state_reg_magic
688 #define PL_reg_oldpos PL_reg_state.re_state_reg_oldpos
689 #define PL_reg_oldcurpm PL_reg_state.re_state_reg_oldcurpm
690 #define PL_reg_curpm PL_reg_state.re_state_reg_curpm
691 #define PL_reg_oldsaved PL_reg_state.re_state_reg_oldsaved
692 #define PL_reg_oldsavedlen PL_reg_state.re_state_reg_oldsavedlen
693 #define PL_reg_maxiter PL_reg_state.re_state_reg_maxiter
694 #define PL_reg_leftiter PL_reg_state.re_state_reg_leftiter
695 #define PL_reg_poscache PL_reg_state.re_state_reg_poscache
696 #define PL_reg_poscache_size PL_reg_state.re_state_reg_poscache_size
697 #define PL_regsize PL_reg_state.re_state_regsize
698 #define PL_reg_starttry PL_reg_state.re_state_reg_starttry
699 #define PL_nrs PL_reg_state.re_state_nrs
701 struct re_save_state {
702 U32 re_state_reg_flags; /* from regexec.c */
703 U32 re_state_reg_start_tmpl; /* from regexec.c */
704 I32 re_state_reg_eval_set; /* from regexec.c */
705 bool re_state_reg_match_utf8; /* from regexec.c */
706 char *re_state_bostr;
707 char *re_state_reginput; /* String-input pointer. */
708 char *re_state_regeol; /* End of input, for $ check. */
709 regexp_paren_pair *re_state_regoffs; /* Pointer to start/end pairs */
710 U32 *re_state_reglastparen; /* Similarly for lastparen. */
711 U32 *re_state_reglastcloseparen; /* Similarly for lastcloseparen. */
712 char **re_state_reg_start_tmp; /* from regexec.c */
713 MAGIC *re_state_reg_magic; /* from regexec.c */
714 PMOP *re_state_reg_oldcurpm; /* from regexec.c */
715 PMOP *re_state_reg_curpm; /* from regexec.c */
716 char *re_state_reg_oldsaved; /* old saved substr during match */
717 STRLEN re_state_reg_oldsavedlen; /* old length of saved substr during match */
718 STRLEN re_state_reg_poscache_size; /* size of pos cache of WHILEM */
719 I32 re_state_reg_oldpos; /* from regexec.c */
720 I32 re_state_reg_maxiter; /* max wait until caching pos */
721 I32 re_state_reg_leftiter; /* wait until caching pos */
722 U32 re_state_regsize; /* from regexec.c */
723 char *re_state_reg_poscache; /* cache of pos of WHILEM */
724 char *re_state_reg_starttry; /* from regexec.c */
725 #ifdef PERL_OLD_COPY_ON_WRITE
726 SV *re_state_nrs; /* was placeholder: unused since 5.8.0 (5.7.2 patch #12027 for bug ID 20010815.012). Used to save rx->saved_copy */
730 #define SAVESTACK_ALLOC_FOR_RE_SAVE_STATE \
731 (1 + ((sizeof(struct re_save_state) - 1) / sizeof(*PL_savestack)))
735 * c-indentation-style: bsd
737 * indent-tabs-mode: t
740 * ex: set ts=8 sts=4 sw=4 noet: