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a0d0e21e | 1 | /* regexp.h |
d6376244 | 2 | * |
4bb101f2 | 3 | * Copyright (C) 1993, 1994, 1996, 1997, 1999, 2000, 2001, 2003, |
699a97de | 4 | * 2005, 2006 by Larry Wall and others |
d6376244 JH |
5 | * |
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. | |
8 | * | |
a0d0e21e LW |
9 | */ |
10 | ||
378cc40b LW |
11 | /* |
12 | * Definitions etc. for regexp(3) routines. | |
13 | * | |
14 | * Caveat: this is V8 regexp(3) [actually, a reimplementation thereof], | |
15 | * not the System V one. | |
16 | */ | |
be8e71aa | 17 | #ifndef PLUGGABLE_RE_EXTENSION |
785a26d5 YO |
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'*/ | |
378cc40b | 20 | |
c277df42 IZ |
21 | struct regnode { |
22 | U8 flags; | |
23 | U8 type; | |
24 | U16 next_off; | |
25 | }; | |
26 | ||
27 | typedef struct regnode regnode; | |
28 | ||
cad2e5aa | 29 | struct reg_substr_data; |
2779dcf1 | 30 | |
0ee3c8d0 JH |
31 | struct reg_data; |
32 | ||
f9f4320a | 33 | struct regexp_engine; |
bbe252da | 34 | |
785a26d5 YO |
35 | struct reg_substr_datum { |
36 | I32 min_offset; | |
37 | I32 max_offset; | |
38 | SV *substr; /* non-utf8 variant */ | |
39 | SV *utf8_substr; /* utf8 variant */ | |
40 | I32 end_shift; | |
41 | }; | |
42 | struct reg_substr_data { | |
43 | struct reg_substr_datum data[3]; /* Actual array */ | |
44 | }; | |
f9f4320a | 45 | |
f8c7b90f | 46 | #ifdef PERL_OLD_COPY_ON_WRITE |
bbe252da YO |
47 | #define SV_SAVED_COPY SV *saved_copy; /* If non-NULL, SV which is COW from original */ |
48 | #else | |
49 | #define SV_SAVED_COPY | |
ed252734 | 50 | #endif |
f8149455 YO |
51 | /* this is ordered such that the most commonly used |
52 | fields are at the start of the struct */ | |
bbe252da | 53 | typedef struct regexp { |
f8149455 YO |
54 | /* what engine created this regexp? */ |
55 | const struct regexp_engine* engine; | |
56 | ||
57 | /* Information about the match that the perl core uses to manage things */ | |
bbe252da | 58 | U32 extflags; /* Flags used both externally and internally */ |
de8c5301 YO |
59 | I32 minlen; /* mininum possible length of string to match */ |
60 | I32 minlenret; /* mininum possible length of $& */ | |
58e23c8d | 61 | U32 gofs; /* chars left of pos that we search from */ |
f8149455 | 62 | struct reg_substr_data *substrs; /* substring data about strings that must appear |
bbe252da | 63 | in the final match, used for optimisations */ |
f8149455 | 64 | U32 nparens; /* number of capture buffers */ |
bbe252da | 65 | |
f8149455 YO |
66 | /* private engine specific data */ |
67 | U32 intflags; /* Engine Specific Internal flags */ | |
68 | void *pprivate; /* Data private to the regex engine which | |
69 | created this object. */ | |
70 | ||
71 | /* Data about the last/current match. These are modified during matching*/ | |
72 | U32 lastparen; /* last open paren matched */ | |
73 | U32 lastcloseparen; /* last close paren matched */ | |
74 | I32 *startp; /* Array of offsets from start of string (@-) */ | |
75 | I32 *endp; /* Array of offsets from start of string (@+) */ | |
bbe252da YO |
76 | char *subbeg; /* saved or original string |
77 | so \digit works forever. */ | |
78 | I32 sublen; /* Length of string pointed by subbeg */ | |
bbe252da | 79 | SV_SAVED_COPY /* If non-NULL, SV which is COW from original */ |
f8149455 YO |
80 | |
81 | ||
82 | /* Information about the match that isn't often used */ | |
83 | char *precomp; /* pre-compilation regular expression */ | |
84 | I32 prelen; /* length of precomp */ | |
bcdf7404 YO |
85 | char *wrapped; /* wrapped version of the pattern */ |
86 | I32 wraplen; /* length of wrapped */ | |
f8149455 YO |
87 | I32 seen_evals; /* number of eval groups in the pattern - for security checks */ |
88 | HV *paren_names; /* Optional hash of paren names */ | |
89 | ||
90 | /* Refcount of this regexp */ | |
91 | I32 refcnt; /* Refcount of this regexp */ | |
f8fc2ecf YO |
92 | } regexp; |
93 | ||
785a26d5 | 94 | /* used for high speed searches */ |
f9f4320a YO |
95 | typedef struct re_scream_pos_data_s |
96 | { | |
97 | char **scream_olds; /* match pos */ | |
98 | I32 *scream_pos; /* Internal iterator of scream. */ | |
99 | } re_scream_pos_data; | |
100 | ||
785a26d5 YO |
101 | /* regexp_engine structure. This is the dispatch table for regexes. |
102 | * Any regex engine implementation must be able to build one of these. | |
103 | */ | |
f9f4320a | 104 | typedef struct regexp_engine { |
f2f78491 YO |
105 | regexp* (*comp) (pTHX_ char* exp, char* xend, PMOP* pm); |
106 | I32 (*exec) (pTHX_ regexp* prog, char* stringarg, char* strend, | |
f9f4320a YO |
107 | char* strbeg, I32 minend, SV* screamer, |
108 | void* data, U32 flags); | |
f2f78491 YO |
109 | char* (*intuit) (pTHX_ regexp *prog, SV *sv, char *strpos, |
110 | char *strend, U32 flags, | |
111 | struct re_scream_pos_data_s *data); | |
112 | SV* (*checkstr) (pTHX_ regexp *prog); | |
113 | void (*free) (pTHX_ struct regexp* r); | |
114 | #ifdef USE_ITHREADS | |
f8149455 | 115 | void* (*dupe) (pTHX_ const regexp *r, CLONE_PARAMS *param); |
f9f4320a YO |
116 | #endif |
117 | } regexp_engine; | |
118 | ||
bbe252da YO |
119 | /* Flags stored in regexp->extflags |
120 | * These are used by code external to the regexp engine | |
e357fc67 YO |
121 | * |
122 | * Note that flags starting with RXf_PMf_ have exact equivalents | |
123 | * stored in op_pmflags and which are defined in op.h, they are defined | |
124 | * numerically here only for clarity. | |
bbe252da YO |
125 | */ |
126 | ||
127 | /* Anchor and GPOS related stuff */ | |
128 | #define RXf_ANCH_BOL 0x00000001 | |
129 | #define RXf_ANCH_MBOL 0x00000002 | |
130 | #define RXf_ANCH_SBOL 0x00000004 | |
131 | #define RXf_ANCH_GPOS 0x00000008 | |
132 | #define RXf_GPOS_SEEN 0x00000010 | |
133 | #define RXf_GPOS_FLOAT 0x00000020 | |
e357fc67 | 134 | /* two bits here */ |
bbe252da YO |
135 | #define RXf_ANCH (RXf_ANCH_BOL|RXf_ANCH_MBOL|RXf_ANCH_GPOS|RXf_ANCH_SBOL) |
136 | #define RXf_GPOS_CHECK (RXf_GPOS_SEEN|RXf_ANCH_GPOS) | |
e357fc67 YO |
137 | #define RXf_ANCH_SINGLE (RXf_ANCH_SBOL|RXf_ANCH_GPOS) |
138 | ||
139 | /* Flags indicating special patterns */ | |
140 | #define RXf_START_ONLY 0x00000200 /* Pattern is /^/ */ | |
141 | #define RXf_WHITE 0x00000400 /* Pattern is /\s+/ */ | |
142 | ||
bcdf7404 | 143 | /* 0x1F800 of extflags is used by (RXf_)PMf_COMPILETIME */ |
e357fc67 YO |
144 | #define RXf_PMf_LOCALE 0x00000800 /* use locale */ |
145 | #define RXf_PMf_MULTILINE 0x00001000 /* /m */ | |
146 | #define RXf_PMf_SINGLELINE 0x00002000 /* /s */ | |
147 | #define RXf_PMf_FOLD 0x00004000 /* /i */ | |
148 | #define RXf_PMf_EXTENDED 0x00008000 /* /x */ | |
cde0cee5 | 149 | #define RXf_PMf_KEEPCOPY 0x00010000 /* /k */ |
e357fc67 | 150 | /* these flags are transfered from the PMOP->op_pmflags member during compilation */ |
cde0cee5 YO |
151 | #define RXf_PMf_STD_PMMOD (RXf_PMf_MULTILINE|RXf_PMf_SINGLELINE|RXf_PMf_FOLD|RXf_PMf_EXTENDED) |
152 | #define RXf_PMf_COMPILETIME (RXf_PMf_MULTILINE|RXf_PMf_SINGLELINE|RXf_PMf_LOCALE|RXf_PMf_FOLD|RXf_PMf_EXTENDED|RXf_PMf_KEEPCOPY) | |
153 | ||
a20207d7 YO |
154 | #define CASE_STD_PMMOD_FLAGS_PARSE_SET(pmfl) \ |
155 | case IGNORE_PAT_MOD: *(pmfl) |= RXf_PMf_FOLD; break; \ | |
156 | case MULTILINE_PAT_MOD: *(pmfl) |= RXf_PMf_MULTILINE; break; \ | |
157 | case SINGLE_PAT_MOD: *(pmfl) |= RXf_PMf_SINGLELINE; break; \ | |
158 | case XTENDED_PAT_MOD: *(pmfl) |= RXf_PMf_EXTENDED; break | |
bbe252da | 159 | |
bcdf7404 YO |
160 | /* chars and strings used as regex pattern modifiers |
161 | * Singlular is a 'c'har, plural is a "string" | |
162 | */ | |
163 | #define EXEC_PAT_MOD 'e' | |
164 | #define KEEPCOPY_PAT_MOD 'k' | |
165 | #define ONCE_PAT_MOD 'o' | |
166 | #define GLOBAL_PAT_MOD 'g' | |
167 | #define CONTINUE_PAT_MOD 'c' | |
168 | #define MULTILINE_PAT_MOD 'm' | |
169 | #define SINGLE_PAT_MOD 's' | |
170 | #define IGNORE_PAT_MOD 'i' | |
171 | #define XTENDED_PAT_MOD 'x' | |
172 | ||
173 | #define ONCE_PAT_MODS "o" | |
174 | #define KEEPCOPY_PAT_MODS "k" | |
175 | #define EXEC_PAT_MODS "e" | |
176 | #define LOOP_PAT_MODS "gc" | |
177 | ||
178 | #define STD_PAT_MODS "msix" | |
179 | ||
180 | #define INT_PAT_MODS STD_PAT_MODS KEEPCOPY_PAT_MODS | |
181 | ||
182 | #define EXT_PAT_MODS ONCE_PAT_MODS KEEPCOPY_PAT_MODS | |
183 | #define QR_PAT_MODS STD_PAT_MODS EXT_PAT_MODS | |
184 | #define M_PAT_MODS QR_PAT_MODS LOOP_PAT_MODS | |
185 | #define S_PAT_MODS M_PAT_MODS EXEC_PAT_MODS | |
186 | ||
187 | ||
bbe252da | 188 | /* What we have seen */ |
bbe252da YO |
189 | #define RXf_LOOKBEHIND_SEEN 0x00020000 |
190 | #define RXf_EVAL_SEEN 0x00040000 | |
191 | #define RXf_CANY_SEEN 0x00080000 | |
192 | ||
193 | /* Special */ | |
194 | #define RXf_NOSCAN 0x00100000 | |
195 | #define RXf_CHECK_ALL 0x00200000 | |
196 | ||
197 | /* UTF8 related */ | |
198 | #define RXf_UTF8 0x00400000 | |
199 | #define RXf_MATCH_UTF8 0x00800000 | |
200 | ||
201 | /* Intuit related */ | |
202 | #define RXf_USE_INTUIT_NOML 0x01000000 | |
203 | #define RXf_USE_INTUIT_ML 0x02000000 | |
204 | #define RXf_INTUIT_TAIL 0x04000000 | |
205 | /* one bit here */ | |
206 | #define RXf_USE_INTUIT (RXf_USE_INTUIT_NOML|RXf_USE_INTUIT_ML) | |
207 | ||
208 | /* Copy and tainted info */ | |
209 | #define RXf_COPY_DONE 0x10000000 | |
210 | #define RXf_TAINTED_SEEN 0x20000000 | |
211 | /* two bits here */ | |
212 | ||
213 | ||
214 | #define RX_HAS_CUTGROUP(prog) ((prog)->intflags & PREGf_CUTGROUP_SEEN) | |
215 | #define RX_MATCH_TAINTED(prog) ((prog)->extflags & RXf_TAINTED_SEEN) | |
216 | #define RX_MATCH_TAINTED_on(prog) ((prog)->extflags |= RXf_TAINTED_SEEN) | |
217 | #define RX_MATCH_TAINTED_off(prog) ((prog)->extflags &= ~RXf_TAINTED_SEEN) | |
72311751 GS |
218 | #define RX_MATCH_TAINTED_set(prog, t) ((t) \ |
219 | ? RX_MATCH_TAINTED_on(prog) \ | |
220 | : RX_MATCH_TAINTED_off(prog)) | |
c277df42 | 221 | |
bbe252da YO |
222 | #define RX_MATCH_COPIED(prog) ((prog)->extflags & RXf_COPY_DONE) |
223 | #define RX_MATCH_COPIED_on(prog) ((prog)->extflags |= RXf_COPY_DONE) | |
224 | #define RX_MATCH_COPIED_off(prog) ((prog)->extflags &= ~RXf_COPY_DONE) | |
cf93c79d IZ |
225 | #define RX_MATCH_COPIED_set(prog,t) ((t) \ |
226 | ? RX_MATCH_COPIED_on(prog) \ | |
227 | : RX_MATCH_COPIED_off(prog)) | |
f9f4320a | 228 | |
be8e71aa YO |
229 | #endif /* PLUGGABLE_RE_EXTENSION */ |
230 | ||
231 | /* Stuff that needs to be included in the plugable extension goes below here */ | |
232 | ||
f8c7b90f | 233 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
234 | #define RX_MATCH_COPY_FREE(rx) \ |
235 | STMT_START {if (rx->saved_copy) { \ | |
236 | SV_CHECK_THINKFIRST_COW_DROP(rx->saved_copy); \ | |
237 | } \ | |
238 | if (RX_MATCH_COPIED(rx)) { \ | |
239 | Safefree(rx->subbeg); \ | |
240 | RX_MATCH_COPIED_off(rx); \ | |
241 | }} STMT_END | |
242 | #else | |
243 | #define RX_MATCH_COPY_FREE(rx) \ | |
244 | STMT_START {if (RX_MATCH_COPIED(rx)) { \ | |
245 | Safefree(rx->subbeg); \ | |
246 | RX_MATCH_COPIED_off(rx); \ | |
247 | }} STMT_END | |
248 | #endif | |
249 | ||
bbe252da YO |
250 | #define RX_MATCH_UTF8(prog) ((prog)->extflags & RXf_MATCH_UTF8) |
251 | #define RX_MATCH_UTF8_on(prog) ((prog)->extflags |= RXf_MATCH_UTF8) | |
252 | #define RX_MATCH_UTF8_off(prog) ((prog)->extflags &= ~RXf_MATCH_UTF8) | |
a30b2f1f RGS |
253 | #define RX_MATCH_UTF8_set(prog, t) ((t) \ |
254 | ? (RX_MATCH_UTF8_on(prog), (PL_reg_match_utf8 = 1)) \ | |
255 | : (RX_MATCH_UTF8_off(prog), (PL_reg_match_utf8 = 0))) | |
256 | ||
cad2e5aa JH |
257 | #define REXEC_COPY_STR 0x01 /* Need to copy the string. */ |
258 | #define REXEC_CHECKED 0x02 /* check_substr already checked. */ | |
259 | #define REXEC_SCREAM 0x04 /* use scream table. */ | |
260 | #define REXEC_IGNOREPOS 0x08 /* \G matches at start. */ | |
cf93c79d | 261 | #define REXEC_NOT_FIRST 0x10 /* This is another iteration of //g. */ |
c277df42 | 262 | |
155aba94 | 263 | #define ReREFCNT_inc(re) ((void)(re && re->refcnt++), re) |
f9f4320a | 264 | #define ReREFCNT_dec(re) CALLREGFREE(re) |
cf93c79d IZ |
265 | |
266 | #define FBMcf_TAIL_DOLLAR 1 | |
cad2e5aa JH |
267 | #define FBMcf_TAIL_DOLLARM 2 |
268 | #define FBMcf_TAIL_Z 4 | |
269 | #define FBMcf_TAIL_z 8 | |
270 | #define FBMcf_TAIL (FBMcf_TAIL_DOLLAR|FBMcf_TAIL_DOLLARM|FBMcf_TAIL_Z|FBMcf_TAIL_z) | |
cf93c79d IZ |
271 | |
272 | #define FBMrf_MULTILINE 1 | |
cad2e5aa | 273 | |
5d9a96ca DM |
274 | /* an accepting state/position*/ |
275 | struct _reg_trie_accepted { | |
276 | U8 *endpos; | |
277 | U16 wordnum; | |
278 | }; | |
279 | typedef struct _reg_trie_accepted reg_trie_accepted; | |
280 | ||
3b0527fe DM |
281 | /* some basic information about the current match that is created by |
282 | * Perl_regexec_flags and then passed to regtry(), regmatch() etc */ | |
283 | ||
284 | typedef struct { | |
285 | regexp *prog; | |
286 | char *bol; | |
287 | char *till; | |
288 | SV *sv; | |
289 | char *ganch; | |
24b23f37 | 290 | char *cutpoint; |
3b0527fe DM |
291 | } regmatch_info; |
292 | ||
5d9a96ca DM |
293 | |
294 | /* structures for holding and saving the state maintained by regmatch() */ | |
295 | ||
6bda09f9 YO |
296 | #define MAX_RECURSE_EVAL_NOCHANGE_DEPTH 50 |
297 | ||
5d9a96ca DM |
298 | typedef I32 CHECKPOINT; |
299 | ||
a0374537 | 300 | typedef struct regmatch_state { |
40a82448 | 301 | int resume_state; /* where to jump to on return */ |
24d3c4a9 | 302 | char *locinput; /* where to backtrack in string on failure */ |
e822a8b4 DM |
303 | |
304 | union { | |
77cb431f DM |
305 | |
306 | /* this is a fake union member that matches the first element | |
307 | * of each member that needs to store positive backtrack | |
308 | * information */ | |
309 | struct { | |
310 | struct regmatch_state *prev_yes_state; | |
311 | } yes; | |
312 | ||
fae667d5 YO |
313 | /* branchlike members */ |
314 | /* this is a fake union member that matches the first elements | |
315 | * of each member that needs to behave like a branch */ | |
316 | struct { | |
5d458dd8 YO |
317 | /* this first element must match u.yes */ |
318 | struct regmatch_state *prev_yes_state; | |
fae667d5 YO |
319 | U32 lastparen; |
320 | CHECKPOINT cp; | |
321 | ||
322 | } branchlike; | |
323 | ||
324 | struct { | |
325 | /* the first elements must match u.branchlike */ | |
326 | struct regmatch_state *prev_yes_state; | |
327 | U32 lastparen; | |
328 | CHECKPOINT cp; | |
329 | ||
330 | regnode *next_branch; /* next branch node */ | |
331 | } branch; | |
332 | ||
333 | struct { | |
334 | /* the first elements must match u.branchlike */ | |
335 | struct regmatch_state *prev_yes_state; | |
336 | U32 lastparen; | |
337 | CHECKPOINT cp; | |
338 | ||
339 | reg_trie_accepted *accept_buff; /* accepting states we have seen */ | |
166ba7cd | 340 | U32 accepted; /* how many accepting states we have seen */ |
7f69552c | 341 | U16 *jump; /* positive offsets from me */ |
166ba7cd | 342 | regnode *B; /* node following the trie */ |
7f69552c | 343 | regnode *me; /* Which node am I - needed for jump tries*/ |
e822a8b4 DM |
344 | } trie; |
345 | ||
fae667d5 YO |
346 | /* special types - these members are used to store state for special |
347 | regops like eval, if/then, lookaround and the markpoint state */ | |
e822a8b4 | 348 | struct { |
77cb431f DM |
349 | /* this first element must match u.yes */ |
350 | struct regmatch_state *prev_yes_state; | |
faec1544 DM |
351 | struct regmatch_state *prev_eval; |
352 | struct regmatch_state *prev_curlyx; | |
aa283a38 | 353 | regexp *prev_rex; |
faec1544 DM |
354 | U32 toggle_reg_flags; /* what bits in PL_reg_flags to |
355 | flip when transitioning between | |
356 | inner and outer rexen */ | |
aa283a38 DM |
357 | CHECKPOINT cp; /* remember current savestack indexes */ |
358 | CHECKPOINT lastcp; | |
40a82448 | 359 | regnode *B; /* the node following us */ |
6bda09f9 | 360 | U32 close_paren; /* which close bracket is our end */ |
e822a8b4 DM |
361 | } eval; |
362 | ||
363 | struct { | |
c476f425 | 364 | /* this first element must match u.yes */ |
262b90c4 | 365 | struct regmatch_state *prev_yes_state; |
fae667d5 YO |
366 | I32 wanted; |
367 | I32 logical; /* saved copy of 'logical' var */ | |
368 | regnode *me; /* the IFMATCH/SUSPEND/UNLESSM node */ | |
369 | } ifmatch; /* and SUSPEND/UNLESSM */ | |
370 | ||
371 | struct { | |
372 | /* this first element must match u.yes */ | |
373 | struct regmatch_state *prev_yes_state; | |
374 | struct regmatch_state *prev_mark; | |
375 | SV* mark_name; | |
376 | char *mark_loc; | |
377 | } mark; | |
378 | ||
379 | struct { | |
380 | int val; | |
381 | } keeper; | |
382 | ||
383 | /* quantifiers - these members are used for storing state for | |
384 | for the regops used to implement quantifiers */ | |
385 | struct { | |
386 | /* this first element must match u.yes */ | |
387 | struct regmatch_state *prev_yes_state; | |
c476f425 DM |
388 | struct regmatch_state *prev_curlyx; /* previous cur_curlyx */ |
389 | CHECKPOINT cp; /* remember current savestack index */ | |
390 | bool minmod; | |
a0374537 | 391 | int parenfloor;/* how far back to strip paren data */ |
c476f425 DM |
392 | int min; /* the minimal number of A's to match */ |
393 | int max; /* the maximal number of A's to match */ | |
394 | regnode *A, *B; /* the nodes corresponding to /A*B/ */ | |
395 | ||
396 | /* these two are modified by WHILEM */ | |
397 | int count; /* how many instances of A we've matched */ | |
398 | char *lastloc;/* where previous A matched (0-len detect) */ | |
e822a8b4 DM |
399 | } curlyx; |
400 | ||
401 | struct { | |
c476f425 | 402 | /* this first element must match u.yes */ |
262b90c4 | 403 | struct regmatch_state *prev_yes_state; |
c476f425 DM |
404 | struct regmatch_state *save_curlyx; |
405 | CHECKPOINT cp; /* remember current savestack indexes */ | |
406 | CHECKPOINT lastcp; | |
407 | char *save_lastloc; /* previous curlyx.lastloc */ | |
408 | I32 cache_offset; | |
409 | I32 cache_mask; | |
e822a8b4 DM |
410 | } whilem; |
411 | ||
412 | struct { | |
5d458dd8 YO |
413 | /* this first element must match u.yes */ |
414 | struct regmatch_state *prev_yes_state; | |
e822a8b4 | 415 | I32 c1, c2; /* case fold search */ |
40a82448 DM |
416 | CHECKPOINT cp; |
417 | I32 alen; /* length of first-matched A string */ | |
418 | I32 count; | |
0cadcf80 | 419 | bool minmod; |
40a82448 DM |
420 | regnode *A, *B; /* the nodes corresponding to /A*B/ */ |
421 | regnode *me; /* the curlym node */ | |
e822a8b4 DM |
422 | } curlym; |
423 | ||
424 | struct { | |
3b6647e0 | 425 | U32 paren; |
c255a977 | 426 | CHECKPOINT cp; |
e822a8b4 | 427 | I32 c1, c2; /* case fold search */ |
c255a977 DM |
428 | char *maxpos; /* highest possible point in string to match */ |
429 | char *oldloc; /* the previous locinput */ | |
e822a8b4 | 430 | int count; |
c255a977 DM |
431 | int min, max; /* {m,n} */ |
432 | regnode *A, *B; /* the nodes corresponding to /A*B/ */ | |
433 | } curly; /* and CURLYN/PLUS/STAR */ | |
dad79028 | 434 | |
d8319b27 | 435 | } u; |
5d9a96ca DM |
436 | } regmatch_state; |
437 | ||
438 | /* how many regmatch_state structs to allocate as a single slab. | |
439 | * We do it in 4K blocks for efficiency. The "3" is 2 for the next/prev | |
440 | * pointers, plus 1 for any mythical malloc overhead. */ | |
441 | ||
442 | #define PERL_REGMATCH_SLAB_SLOTS \ | |
443 | ((4096 - 3 * sizeof (void*)) / sizeof(regmatch_state)) | |
444 | ||
445 | typedef struct regmatch_slab { | |
446 | regmatch_state states[PERL_REGMATCH_SLAB_SLOTS]; | |
447 | struct regmatch_slab *prev, *next; | |
448 | } regmatch_slab; | |
1ade1aa1 | 449 | |
46ab3289 NC |
450 | #define PL_reg_flags PL_reg_state.re_state_reg_flags |
451 | #define PL_bostr PL_reg_state.re_state_bostr | |
452 | #define PL_reginput PL_reg_state.re_state_reginput | |
46ab3289 NC |
453 | #define PL_regeol PL_reg_state.re_state_regeol |
454 | #define PL_regstartp PL_reg_state.re_state_regstartp | |
455 | #define PL_regendp PL_reg_state.re_state_regendp | |
456 | #define PL_reglastparen PL_reg_state.re_state_reglastparen | |
457 | #define PL_reglastcloseparen PL_reg_state.re_state_reglastcloseparen | |
46ab3289 NC |
458 | #define PL_reg_start_tmp PL_reg_state.re_state_reg_start_tmp |
459 | #define PL_reg_start_tmpl PL_reg_state.re_state_reg_start_tmpl | |
460 | #define PL_reg_eval_set PL_reg_state.re_state_reg_eval_set | |
46ab3289 NC |
461 | #define PL_reg_match_utf8 PL_reg_state.re_state_reg_match_utf8 |
462 | #define PL_reg_magic PL_reg_state.re_state_reg_magic | |
463 | #define PL_reg_oldpos PL_reg_state.re_state_reg_oldpos | |
464 | #define PL_reg_oldcurpm PL_reg_state.re_state_reg_oldcurpm | |
465 | #define PL_reg_curpm PL_reg_state.re_state_reg_curpm | |
466 | #define PL_reg_oldsaved PL_reg_state.re_state_reg_oldsaved | |
467 | #define PL_reg_oldsavedlen PL_reg_state.re_state_reg_oldsavedlen | |
468 | #define PL_reg_maxiter PL_reg_state.re_state_reg_maxiter | |
469 | #define PL_reg_leftiter PL_reg_state.re_state_reg_leftiter | |
470 | #define PL_reg_poscache PL_reg_state.re_state_reg_poscache | |
471 | #define PL_reg_poscache_size PL_reg_state.re_state_reg_poscache_size | |
472 | #define PL_regsize PL_reg_state.re_state_regsize | |
473 | #define PL_reg_starttry PL_reg_state.re_state_reg_starttry | |
474 | #define PL_nrs PL_reg_state.re_state_nrs | |
475 | ||
1ade1aa1 NC |
476 | struct re_save_state { |
477 | U32 re_state_reg_flags; /* from regexec.c */ | |
478 | char *re_state_bostr; | |
479 | char *re_state_reginput; /* String-input pointer. */ | |
1ade1aa1 NC |
480 | char *re_state_regeol; /* End of input, for $ check. */ |
481 | I32 *re_state_regstartp; /* Pointer to startp array. */ | |
482 | I32 *re_state_regendp; /* Ditto for endp. */ | |
483 | U32 *re_state_reglastparen; /* Similarly for lastparen. */ | |
484 | U32 *re_state_reglastcloseparen; /* Similarly for lastcloseparen. */ | |
1ade1aa1 NC |
485 | char **re_state_reg_start_tmp; /* from regexec.c */ |
486 | U32 re_state_reg_start_tmpl; /* from regexec.c */ | |
487 | I32 re_state_reg_eval_set; /* from regexec.c */ | |
1ade1aa1 NC |
488 | bool re_state_reg_match_utf8; /* from regexec.c */ |
489 | MAGIC *re_state_reg_magic; /* from regexec.c */ | |
490 | I32 re_state_reg_oldpos; /* from regexec.c */ | |
491 | PMOP *re_state_reg_oldcurpm; /* from regexec.c */ | |
492 | PMOP *re_state_reg_curpm; /* from regexec.c */ | |
493 | char *re_state_reg_oldsaved; /* old saved substr during match */ | |
494 | STRLEN re_state_reg_oldsavedlen; /* old length of saved substr during match */ | |
495 | I32 re_state_reg_maxiter; /* max wait until caching pos */ | |
496 | I32 re_state_reg_leftiter; /* wait until caching pos */ | |
497 | char *re_state_reg_poscache; /* cache of pos of WHILEM */ | |
498 | STRLEN re_state_reg_poscache_size; /* size of pos cache of WHILEM */ | |
3b6647e0 | 499 | U32 re_state_regsize; /* from regexec.c */ |
1ade1aa1 NC |
500 | char *re_state_reg_starttry; /* from regexec.c */ |
501 | #ifdef PERL_OLD_COPY_ON_WRITE | |
46ab3289 | 502 | 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 */ |
1ade1aa1 NC |
503 | #endif |
504 | }; | |
505 | ||
506 | #define SAVESTACK_ALLOC_FOR_RE_SAVE_STATE \ | |
507 | (1 + ((sizeof(struct re_save_state) - 1) / sizeof(*PL_savestack))) | |
cde0cee5 | 508 | |
1ade1aa1 NC |
509 | /* |
510 | * Local variables: | |
511 | * c-indentation-style: bsd | |
512 | * c-basic-offset: 4 | |
513 | * indent-tabs-mode: t | |
514 | * End: | |
515 | * | |
516 | * ex: set ts=8 sts=4 sw=4 noet: | |
517 | */ |