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a0d0e21e | 1 | /* regexp.h |
d6376244 | 2 | * |
4bb101f2 | 3 | * Copyright (C) 1993, 1994, 1996, 1997, 1999, 2000, 2001, 2003, |
1129b882 | 4 | * 2005, 2006, 2007, 2008 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 | |
79a2a0e8 KW |
21 | #include "utf8.h" |
22 | ||
c277df42 IZ |
23 | struct regnode { |
24 | U8 flags; | |
25 | U8 type; | |
26 | U16 next_off; | |
27 | }; | |
28 | ||
29 | typedef struct regnode regnode; | |
30 | ||
cad2e5aa | 31 | struct reg_substr_data; |
2779dcf1 | 32 | |
0ee3c8d0 JH |
33 | struct reg_data; |
34 | ||
f9f4320a | 35 | struct regexp_engine; |
28d8d7f4 | 36 | struct regexp; |
bbe252da | 37 | |
785a26d5 | 38 | struct reg_substr_datum { |
c4828ca0 DM |
39 | SSize_t min_offset; /* min pos (in chars) that substr must appear */ |
40 | SSize_t max_offset /* max pos (in chars) that substr must appear */; | |
785a26d5 YO |
41 | SV *substr; /* non-utf8 variant */ |
42 | SV *utf8_substr; /* utf8 variant */ | |
c4828ca0 | 43 | SSize_t end_shift; /* how many fixed chars must end the string */ |
785a26d5 YO |
44 | }; |
45 | struct reg_substr_data { | |
6480a6c4 | 46 | U8 check_ix; /* index into data[] of check substr */ |
785a26d5 YO |
47 | struct reg_substr_datum data[3]; /* Actual array */ |
48 | }; | |
f9f4320a | 49 | |
db2c6cb3 | 50 | #ifdef PERL_ANY_COW |
bbe252da YO |
51 | #define SV_SAVED_COPY SV *saved_copy; /* If non-NULL, SV which is COW from original */ |
52 | #else | |
53 | #define SV_SAVED_COPY | |
ed252734 | 54 | #endif |
28d8d7f4 | 55 | |
b3fd53f3 DM |
56 | /* offsets within a string of a particular /(.)/ capture */ |
57 | ||
f0ab9afb | 58 | typedef struct regexp_paren_pair { |
99a90e59 FC |
59 | SSize_t start; |
60 | SSize_t end; | |
b3fd53f3 DM |
61 | /* 'start_tmp' records a new opening position before the matching end |
62 | * has been found, so that the old start and end values are still | |
63 | * valid, e.g. | |
64 | * "abc" =~ /(.(?{print "[$1]"}))+/ | |
65 | *outputs [][a][b] | |
66 | * This field is not part of the API. */ | |
ea3daa5d | 67 | SSize_t start_tmp; |
f0ab9afb | 68 | } regexp_paren_pair; |
28d8d7f4 | 69 | |
52ae8f7e | 70 | #if defined(PERL_IN_REGCOMP_C) || defined(PERL_IN_UTF8_C) |
164173a2 | 71 | #define _invlist_union(a, b, output) _invlist_union_maybe_complement_2nd(a, b, FALSE, output) |
52ae8f7e | 72 | #define _invlist_intersection(a, b, output) _invlist_intersection_maybe_complement_2nd(a, b, FALSE, output) |
3f80b571 KW |
73 | |
74 | /* Subtracting b from a leaves in a everything that was there that isn't in b, | |
75 | * that is the intersection of a with b's complement */ | |
76 | #define _invlist_subtract(a, b, output) _invlist_intersection_maybe_complement_2nd(a, b, TRUE, output) | |
52ae8f7e KW |
77 | #endif |
78 | ||
3d2bd50a DM |
79 | /* record the position of a (?{...}) within a pattern */ |
80 | ||
81 | struct reg_code_block { | |
82 | STRLEN start; | |
83 | STRLEN end; | |
84 | OP *block; | |
b30fcab9 | 85 | REGEXP *src_regex; |
3d2bd50a DM |
86 | }; |
87 | ||
88 | ||
882227b7 AB |
89 | /* |
90 | The regexp/REGEXP struct, see L<perlreapi> for further documentation | |
91 | on the individual fields. The struct is ordered so that the most | |
92 | commonly used fields are placed at the start. | |
93 | ||
94 | Any patch that adds items to this struct will need to include | |
95 | changes to F<sv.c> (C<Perl_re_dup()>) and F<regcomp.c> | |
96 | (C<pregfree()>). This involves freeing or cloning items in the | |
97 | regexp's data array based on the data item's type. | |
98 | */ | |
99 | ||
08e44740 NC |
100 | #define _REGEXP_COMMON \ |
101 | /* what engine created this regexp? */ \ | |
102 | const struct regexp_engine* engine; \ | |
103 | REGEXP *mother_re; /* what re is this a lightweight copy of? */ \ | |
89f6f287 | 104 | HV *paren_names; /* Optional hash of paren names */ \ |
ba6840fb | 105 | /*--------------------------------------------------------*/ \ |
08e44740 NC |
106 | /* Information about the match that the perl core uses to */ \ |
107 | /* manage things */ \ | |
108 | U32 extflags; /* Flags used both externally and internally */ \ | |
ea3daa5d FC |
109 | SSize_t minlen; /* mininum possible number of chars in string to match */\ |
110 | SSize_t minlenret; /* mininum possible number of chars in $& */ \ | |
111 | STRLEN gofs; /* chars left of pos that we search from */ \ | |
08e44740 NC |
112 | /* substring data about strings that must appear in the */ \ |
113 | /* final match, used for optimisations */ \ | |
114 | struct reg_substr_data *substrs; \ | |
115 | U32 nparens; /* number of capture buffers */ \ | |
116 | /* private engine specific data */ \ | |
117 | U32 intflags; /* Engine Specific Internal flags */ \ | |
118 | void *pprivate; /* Data private to the regex engine which */ \ | |
119 | /* created this object. */ \ | |
ba6840fb | 120 | /*--------------------------------------------------------*/ \ |
08e44740 NC |
121 | /* Data about the last/current match. These are modified */ \ |
122 | /* during matching */ \ | |
123 | U32 lastparen; /* last open paren matched */ \ | |
124 | U32 lastcloseparen; /* last close paren matched */ \ | |
08e44740 NC |
125 | /* Array of offsets for (@-) and (@+) */ \ |
126 | regexp_paren_pair *offs; \ | |
ba6840fb YO |
127 | char **recurse_locinput; /* used to detect infinite recursion, XXX: move to internal */ \ |
128 | /*--------------------------------------------------------*/ \ | |
08e44740 NC |
129 | /* saved or original string so \digit works forever. */ \ |
130 | char *subbeg; \ | |
131 | SV_SAVED_COPY /* If non-NULL, SV which is COW from original */\ | |
19394178 | 132 | SSize_t sublen; /* Length of string pointed by subbeg */ \ |
ea3daa5d FC |
133 | SSize_t suboffset; /* byte offset of subbeg from logical start of str */ \ |
134 | SSize_t subcoffset; /* suboffset equiv, but in chars (for @-/@+) */ \ | |
08e44740 | 135 | /* Information about the match that isn't often used */ \ |
ee273784 | 136 | SSize_t maxlen; /* mininum possible number of chars in string to match */\ |
ba6840fb | 137 | /*--------------------------------------------------------*/ \ |
08e44740 | 138 | /* offset from wrapped to the start of precomp */ \ |
654eccd5 | 139 | PERL_BITFIELD32 pre_prefix:4; \ |
dbc200c5 YO |
140 | /* original flags used to compile the pattern, may differ */ \ |
141 | /* from extflags in various ways */ \ | |
142 | PERL_BITFIELD32 compflags:9; \ | |
ba6840fb | 143 | /*--------------------------------------------------------*/ \ |
b82ad30c | 144 | CV *qr_anoncv /* the anon sub wrapped round qr/(?{..})/ */ |
08e44740 | 145 | |
bbe252da | 146 | typedef struct regexp { |
288b8c02 | 147 | _XPV_HEAD; |
08e44740 | 148 | _REGEXP_COMMON; |
f8fc2ecf YO |
149 | } regexp; |
150 | ||
89f6f287 | 151 | #define RXp_PAREN_NAMES(rx) ((rx)->paren_names) |
5daac39c | 152 | |
785a26d5 | 153 | /* used for high speed searches */ |
f9f4320a YO |
154 | typedef struct re_scream_pos_data_s |
155 | { | |
156 | char **scream_olds; /* match pos */ | |
ea3daa5d | 157 | SSize_t *scream_pos; /* Internal iterator of scream. */ |
f9f4320a YO |
158 | } re_scream_pos_data; |
159 | ||
785a26d5 YO |
160 | /* regexp_engine structure. This is the dispatch table for regexes. |
161 | * Any regex engine implementation must be able to build one of these. | |
162 | */ | |
f9f4320a | 163 | typedef struct regexp_engine { |
1593ad57 | 164 | REGEXP* (*comp) (pTHX_ SV * const pattern, U32 flags); |
49d7dfbc | 165 | I32 (*exec) (pTHX_ REGEXP * const rx, char* stringarg, char* strend, |
ea3daa5d | 166 | char* strbeg, SSize_t minend, SV* sv, |
49d7dfbc | 167 | void* data, U32 flags); |
52a21eb3 DM |
168 | char* (*intuit) (pTHX_ |
169 | REGEXP * const rx, | |
170 | SV *sv, | |
171 | const char * const strbeg, | |
172 | char *strpos, | |
173 | char *strend, | |
174 | const U32 flags, | |
9f61653a | 175 | re_scream_pos_data *data); |
49d7dfbc | 176 | SV* (*checkstr) (pTHX_ REGEXP * const rx); |
fc6bde6f | 177 | void (*rxfree) (pTHX_ REGEXP * const rx); |
2fdbfb4d | 178 | void (*numbered_buff_FETCH) (pTHX_ REGEXP * const rx, const I32 paren, |
192b9cd1 | 179 | SV * const sv); |
2fdbfb4d AB |
180 | void (*numbered_buff_STORE) (pTHX_ REGEXP * const rx, const I32 paren, |
181 | SV const * const value); | |
182 | I32 (*numbered_buff_LENGTH) (pTHX_ REGEXP * const rx, const SV * const sv, | |
183 | const I32 paren); | |
192b9cd1 AB |
184 | SV* (*named_buff) (pTHX_ REGEXP * const rx, SV * const key, |
185 | SV * const value, const U32 flags); | |
186 | SV* (*named_buff_iter) (pTHX_ REGEXP * const rx, const SV * const lastkey, | |
187 | const U32 flags); | |
49d7dfbc | 188 | SV* (*qr_package)(pTHX_ REGEXP * const rx); |
f2f78491 | 189 | #ifdef USE_ITHREADS |
49d7dfbc | 190 | void* (*dupe) (pTHX_ REGEXP * const rx, CLONE_PARAMS *param); |
2fdbfb4d | 191 | #endif |
3c13cae6 DM |
192 | REGEXP* (*op_comp) (pTHX_ SV ** const patternp, int pat_count, |
193 | OP *expr, const struct regexp_engine* eng, | |
7984ae89 | 194 | REGEXP *old_re, |
76ac488f | 195 | bool *is_bare_re, U32 orig_rx_flags, U32 pm_flags); |
f9f4320a YO |
196 | } regexp_engine; |
197 | ||
192b9cd1 AB |
198 | /* |
199 | These are passed to the numbered capture variable callbacks as the | |
200 | paren name. >= 1 is reserved for actual numbered captures, i.e. $1, | |
201 | $2 etc. | |
202 | */ | |
2c7b5d76 DM |
203 | #define RX_BUFF_IDX_CARET_PREMATCH -5 /* ${^PREMATCH} */ |
204 | #define RX_BUFF_IDX_CARET_POSTMATCH -4 /* ${^POSTMATCH} */ | |
205 | #define RX_BUFF_IDX_CARET_FULLMATCH -3 /* ${^MATCH} */ | |
206 | #define RX_BUFF_IDX_PREMATCH -2 /* $` */ | |
207 | #define RX_BUFF_IDX_POSTMATCH -1 /* $' */ | |
208 | #define RX_BUFF_IDX_FULLMATCH 0 /* $& */ | |
192b9cd1 AB |
209 | |
210 | /* | |
211 | Flags that are passed to the named_buff and named_buff_iter | |
212 | callbacks above. Those routines are called from universal.c via the | |
213 | Tie::Hash::NamedCapture interface for %+ and %- and the re:: | |
214 | functions in the same file. | |
215 | */ | |
216 | ||
217 | /* The Tie::Hash::NamedCapture operation this is part of, if any */ | |
f1b875a0 YO |
218 | #define RXapif_FETCH 0x0001 |
219 | #define RXapif_STORE 0x0002 | |
220 | #define RXapif_DELETE 0x0004 | |
221 | #define RXapif_CLEAR 0x0008 | |
222 | #define RXapif_EXISTS 0x0010 | |
223 | #define RXapif_SCALAR 0x0020 | |
224 | #define RXapif_FIRSTKEY 0x0040 | |
225 | #define RXapif_NEXTKEY 0x0080 | |
192b9cd1 AB |
226 | |
227 | /* Whether %+ or %- is being operated on */ | |
f1b875a0 YO |
228 | #define RXapif_ONE 0x0100 /* %+ */ |
229 | #define RXapif_ALL 0x0200 /* %- */ | |
192b9cd1 AB |
230 | |
231 | /* Whether this is being called from a re:: function */ | |
f1b875a0 YO |
232 | #define RXapif_REGNAME 0x0400 |
233 | #define RXapif_REGNAMES 0x0800 | |
7948fc08 | 234 | #define RXapif_REGNAMES_COUNT 0x1000 |
192b9cd1 | 235 | |
f7e71195 AB |
236 | /* |
237 | =head1 REGEXP Functions | |
238 | ||
239 | =for apidoc Am|REGEXP *|SvRX|SV *sv | |
240 | ||
72d33970 | 241 | Convenience macro to get the REGEXP from a SV. This is approximately |
f7e71195 AB |
242 | equivalent to the following snippet: |
243 | ||
244 | if (SvMAGICAL(sv)) | |
245 | mg_get(sv); | |
1af910ea DL |
246 | if (SvROK(sv)) |
247 | sv = MUTABLE_SV(SvRV(sv)); | |
248 | if (SvTYPE(sv) == SVt_REGEXP) | |
249 | return (REGEXP*) sv; | |
f7e71195 | 250 | |
796b6530 | 251 | C<NULL> will be returned if a REGEXP* is not found. |
f7e71195 AB |
252 | |
253 | =for apidoc Am|bool|SvRXOK|SV* sv | |
254 | ||
1af910ea DL |
255 | Returns a boolean indicating whether the SV (or the one it references) |
256 | is a REGEXP. | |
f7e71195 AB |
257 | |
258 | If you want to do something with the REGEXP* later use SvRX instead | |
259 | and check for NULL. | |
260 | ||
261 | =cut | |
262 | */ | |
263 | ||
264 | #define SvRX(sv) (Perl_get_re_arg(aTHX_ sv)) | |
265 | #define SvRXOK(sv) (Perl_get_re_arg(aTHX_ sv) ? TRUE : FALSE) | |
266 | ||
267 | ||
7948fc08 | 268 | /* Flags stored in regexp->extflags |
bbe252da | 269 | * These are used by code external to the regexp engine |
e357fc67 | 270 | * |
5b126c84 KW |
271 | * Note that the flags whose names start with RXf_PMf_ are defined in |
272 | * op_reg_common.h, being copied from the parallel flags of op_pmflags | |
cb5027f2 | 273 | * |
eb2624c9 FC |
274 | * NOTE: if you modify any RXf flags you should run regen.pl or |
275 | * regen/regcomp.pl so that regnodes.h is updated with the changes. | |
cb5027f2 | 276 | * |
bbe252da YO |
277 | */ |
278 | ||
5b126c84 KW |
279 | #include "op_reg_common.h" |
280 | ||
41d7c59e | 281 | #define RXf_PMf_STD_PMMOD (RXf_PMf_MULTILINE|RXf_PMf_SINGLELINE|RXf_PMf_FOLD|RXf_PMf_EXTENDED|RXf_PMf_NOCAPTURE) |
cde0cee5 | 282 | |
cc4d09e1 KW |
283 | #define CASE_STD_PMMOD_FLAGS_PARSE_SET(pmfl, x_count) \ |
284 | case IGNORE_PAT_MOD: *(pmfl) |= RXf_PMf_FOLD; break; \ | |
285 | case MULTILINE_PAT_MOD: *(pmfl) |= RXf_PMf_MULTILINE; break; \ | |
286 | case SINGLE_PAT_MOD: *(pmfl) |= RXf_PMf_SINGLELINE; break; \ | |
41d7c59e MH |
287 | case XTENDED_PAT_MOD: *(pmfl) |= RXf_PMf_EXTENDED; (x_count)++; break;\ |
288 | case NOCAPTURE_PAT_MOD: *(pmfl) |= RXf_PMf_NOCAPTURE; break; | |
cc4d09e1 KW |
289 | |
290 | #define STD_PMMOD_FLAGS_PARSE_X_WARN(x_count) \ | |
291 | if (UNLIKELY((x_count) > 1)) { \ | |
292 | Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_REGEXP), \ | |
293 | "Having more than one /%c regexp modifier is deprecated", \ | |
294 | XTENDED_PAT_MOD); \ | |
295 | } | |
bbe252da | 296 | |
94b03d7d | 297 | /* Note, includes charset ones, assumes 0 is the default for them */ |
fb85c044 | 298 | #define STD_PMMOD_FLAGS_CLEAR(pmfl) \ |
41d7c59e | 299 | *(pmfl) &= ~(RXf_PMf_FOLD|RXf_PMf_MULTILINE|RXf_PMf_SINGLELINE|RXf_PMf_EXTENDED|RXf_PMf_CHARSET|RXf_PMf_NOCAPTURE) |
fb85c044 | 300 | |
bcdf7404 | 301 | /* chars and strings used as regex pattern modifiers |
486ec47a | 302 | * Singular is a 'c'har, plural is a "string" |
87e95b7f YO |
303 | * |
304 | * NOTE, KEEPCOPY was originally 'k', but was changed to 'p' for preserve | |
305 | * for compatibility reasons with Regexp::Common which highjacked (?k:...) | |
306 | * for its own uses. So 'k' is out as well. | |
bcdf7404 | 307 | */ |
85508812 | 308 | #define DEFAULT_PAT_MOD '^' /* Short for all the default modifiers */ |
bcdf7404 | 309 | #define EXEC_PAT_MOD 'e' |
87e95b7f | 310 | #define KEEPCOPY_PAT_MOD 'p' |
41d7c59e | 311 | #define NOCAPTURE_PAT_MOD 'n' |
bcdf7404 YO |
312 | #define ONCE_PAT_MOD 'o' |
313 | #define GLOBAL_PAT_MOD 'g' | |
314 | #define CONTINUE_PAT_MOD 'c' | |
315 | #define MULTILINE_PAT_MOD 'm' | |
316 | #define SINGLE_PAT_MOD 's' | |
317 | #define IGNORE_PAT_MOD 'i' | |
318 | #define XTENDED_PAT_MOD 'x' | |
4f4d7508 | 319 | #define NONDESTRUCT_PAT_MOD 'r' |
9de15fec KW |
320 | #define LOCALE_PAT_MOD 'l' |
321 | #define UNICODE_PAT_MOD 'u' | |
50e91148 | 322 | #define DEPENDS_PAT_MOD 'd' |
cfaf538b | 323 | #define ASCII_RESTRICT_PAT_MOD 'a' |
bcdf7404 YO |
324 | |
325 | #define ONCE_PAT_MODS "o" | |
87e95b7f | 326 | #define KEEPCOPY_PAT_MODS "p" |
41d7c59e | 327 | #define NOCAPTURE_PAT_MODS "n" |
bcdf7404 YO |
328 | #define EXEC_PAT_MODS "e" |
329 | #define LOOP_PAT_MODS "gc" | |
4f4d7508 | 330 | #define NONDESTRUCT_PAT_MODS "r" |
9de15fec KW |
331 | #define LOCALE_PAT_MODS "l" |
332 | #define UNICODE_PAT_MODS "u" | |
50e91148 | 333 | #define DEPENDS_PAT_MODS "d" |
cfaf538b | 334 | #define ASCII_RESTRICT_PAT_MODS "a" |
df7a8460 | 335 | #define ASCII_MORE_RESTRICT_PAT_MODS "aa" |
bcdf7404 | 336 | |
78fecfc8 | 337 | /* This string is expected by regcomp.c to be ordered so that the first |
c18d5d15 KW |
338 | * character is the flag in bit RXf_PMf_STD_PMMOD_SHIFT of extflags; the next |
339 | * character is bit +1, etc. */ | |
41d7c59e | 340 | #define STD_PAT_MODS "msixxn" |
bcdf7404 | 341 | |
94b03d7d KW |
342 | #define CHARSET_PAT_MODS ASCII_RESTRICT_PAT_MODS DEPENDS_PAT_MODS LOCALE_PAT_MODS UNICODE_PAT_MODS |
343 | ||
78fecfc8 | 344 | /* This string is expected by XS_re_regexp_pattern() in universal.c to be ordered |
c18d5d15 KW |
345 | * so that the first character is the flag in bit RXf_PMf_STD_PMMOD_SHIFT of |
346 | * extflags; the next character is in bit +1, etc. */ | |
bcdf7404 YO |
347 | #define INT_PAT_MODS STD_PAT_MODS KEEPCOPY_PAT_MODS |
348 | ||
41d7c59e | 349 | #define EXT_PAT_MODS ONCE_PAT_MODS KEEPCOPY_PAT_MODS NOCAPTURE_PAT_MODS |
94b03d7d | 350 | #define QR_PAT_MODS STD_PAT_MODS EXT_PAT_MODS CHARSET_PAT_MODS |
bcdf7404 | 351 | #define M_PAT_MODS QR_PAT_MODS LOOP_PAT_MODS |
4f4d7508 | 352 | #define S_PAT_MODS M_PAT_MODS EXEC_PAT_MODS NONDESTRUCT_PAT_MODS |
bcdf7404 | 353 | |
cb5027f2 | 354 | /* |
eb2624c9 FC |
355 | * NOTE: if you modify any RXf flags you should run regen.pl or |
356 | * regen/regcomp.pl so that regnodes.h is updated with the changes. | |
cb5027f2 YO |
357 | * |
358 | */ | |
bcdf7404 | 359 | |
dbc200c5 YO |
360 | /* |
361 | Set in Perl_pmruntime if op_flags & OPf_SPECIAL, i.e. split. Will | |
362 | be used by regex engines to check whether they should set | |
363 | RXf_SKIPWHITE | |
364 | */ | |
32f62247 KW |
365 | #define RXf_SPLIT RXf_PMf_SPLIT |
366 | ||
0bd51918 KW |
367 | /* Currently the regex flags occupy a single 32-bit word. Not all bits are |
368 | * currently used. The lower bits are shared with their corresponding PMf flag | |
369 | * bits, up to but not including _RXf_PMf_SHIFT_NEXT. The unused bits | |
370 | * immediately follow; finally the used RXf-only (unshared) bits, so that the | |
371 | * highest bit in the word is used. This gathers all the unused bits as a pool | |
372 | * in the middle, like so: 11111111111111110000001111111111 | |
373 | * where the '1's represent used bits, and the '0's unused. This design allows | |
374 | * us to allocate off one end of the pool if we need to add a shared bit, and | |
375 | * off the other end if we need a non-shared bit, without disturbing the other | |
376 | * bits. This maximizes the likelihood of being able to change things without | |
377 | * breaking binary compatibility. | |
378 | * | |
379 | * To add shared bits, do so in op_reg_common.h. This should change | |
380 | * _RXf_PMf_SHIFT_NEXT so that things won't compile. Then come to regexp.h and | |
381 | * op.h and adjust the constant adders in the definitions of RXf_BASE_SHIFT and | |
382 | * Pmf_BASE_SHIFT down by the number of shared bits you added. That's it. | |
383 | * Things should be binary compatible. But if either of these gets to having | |
384 | * to subtract rather than add, leave at 0 and instead adjust all the entries | |
385 | * that are in terms of it. But if the first one of those is already | |
386 | * RXf_BASE_SHIFT+0, there are no bits left, and a redesign is in order. | |
387 | * | |
388 | * To remove unshared bits, just delete its entry. If you're where breaking | |
389 | * binary compatibility is ok to do, you might want to adjust things to move | |
390 | * the newly opened space so that it gets absorbed into the common pool. | |
391 | * | |
392 | * To add unshared bits, first use up any gaps in the middle. Otherwise, | |
393 | * allocate off the low end until you get to RXf_BASE_SHIFT+0. If that isn't | |
394 | * enough, move RXf_BASE_SHIFT down (if possible) and add the new bit at the | |
395 | * other end instead; this preserves binary compatibility. | |
396 | * | |
397 | * For the regexp bits, PL_reg_extflags_name[] in regnodes.h has a comment | |
398 | * giving which bits are used/unused */ | |
399 | ||
d262c0c7 | 400 | #define RXf_BASE_SHIFT (_RXf_PMf_SHIFT_NEXT + 2) |
52d81aa8 | 401 | |
bbe252da | 402 | /* What we have seen */ |
9cba692b KW |
403 | #define RXf_NO_INPLACE_SUBST (1U<<(RXf_BASE_SHIFT+2)) |
404 | #define RXf_EVAL_SEEN (1U<<(RXf_BASE_SHIFT+3)) | |
bbe252da YO |
405 | |
406 | /* Special */ | |
9cba692b KW |
407 | #define RXf_UNBOUNDED_QUANTIFIER_SEEN (1U<<(RXf_BASE_SHIFT+4)) |
408 | #define RXf_CHECK_ALL (1U<<(RXf_BASE_SHIFT+5)) | |
bbe252da YO |
409 | |
410 | /* UTF8 related */ | |
9cba692b | 411 | #define RXf_MATCH_UTF8 (1U<<(RXf_BASE_SHIFT+6)) /* $1 etc are utf8 */ |
bbe252da YO |
412 | |
413 | /* Intuit related */ | |
9cba692b KW |
414 | #define RXf_USE_INTUIT_NOML (1U<<(RXf_BASE_SHIFT+7)) |
415 | #define RXf_USE_INTUIT_ML (1U<<(RXf_BASE_SHIFT+8)) | |
416 | #define RXf_INTUIT_TAIL (1U<<(RXf_BASE_SHIFT+9)) | |
bbe252da YO |
417 | #define RXf_USE_INTUIT (RXf_USE_INTUIT_NOML|RXf_USE_INTUIT_ML) |
418 | ||
a3b51d37 | 419 | /* Do we have some sort of anchor? */ |
9cba692b | 420 | #define RXf_IS_ANCHORED (1U<<(RXf_BASE_SHIFT+10)) |
a3b51d37 | 421 | |
bbe252da | 422 | /* Copy and tainted info */ |
9cba692b | 423 | #define RXf_COPY_DONE (1U<<(RXf_BASE_SHIFT+11)) |
ef07e810 | 424 | |
1738e041 | 425 | /* post-execution: $1 et al are tainted */ |
9cba692b | 426 | #define RXf_TAINTED_SEEN (1U<<(RXf_BASE_SHIFT+12)) |
ef07e810 | 427 | /* this pattern was tainted during compilation */ |
9cba692b | 428 | #define RXf_TAINTED (1U<<(RXf_BASE_SHIFT+13)) |
52d81aa8 NC |
429 | |
430 | /* Flags indicating special patterns */ | |
9cba692b KW |
431 | #define RXf_START_ONLY (1U<<(RXf_BASE_SHIFT+14)) /* Pattern is /^/ */ |
432 | #define RXf_SKIPWHITE (1U<<(RXf_BASE_SHIFT+15)) /* Pattern is for a */ | |
433 | /* split " " */ | |
434 | #define RXf_WHITE (1U<<(RXf_BASE_SHIFT+16)) /* Pattern is /\s+/ */ | |
3f6e6b29 | 435 | #define RXf_NULL (1U<<(RXf_BASE_SHIFT+17)) /* Pattern is // */ |
0bd51918 KW |
436 | |
437 | /* See comments at the beginning of these defines about adding bits. The | |
438 | * highest bit position should be used, so that if RXf_BASE_SHIFT gets | |
439 | * increased, the #error below will be triggered so that you will be reminded | |
440 | * to adjust things at the other end to keep the bit positions unchanged */ | |
3f6e6b29 | 441 | #if RXf_BASE_SHIFT+17 > 31 |
0bd51918 | 442 | # error Too many RXf_PMf bits used. See comments at beginning of these for what to do |
1850c8f9 | 443 | #endif |
c737faaf | 444 | |
cb5027f2 | 445 | /* |
eb2624c9 FC |
446 | * NOTE: if you modify any RXf flags you should run regen.pl or |
447 | * regen/regcomp.pl so that regnodes.h is updated with the changes. | |
cb5027f2 YO |
448 | * |
449 | */ | |
bbe252da | 450 | |
dc6d7f5c | 451 | #ifdef NO_TAINT_SUPPORT |
284167a5 S |
452 | # define RX_ISTAINTED(prog) 0 |
453 | # define RX_TAINT_on(prog) NOOP | |
272d35c9 DM |
454 | # define RXp_MATCH_TAINTED(prog) 0 |
455 | # define RX_MATCH_TAINTED(prog) 0 | |
456 | # define RXp_MATCH_TAINTED_on(prog) NOOP | |
457 | # define RX_MATCH_TAINTED_on(prog) NOOP | |
458 | # define RX_MATCH_TAINTED_off(prog) NOOP | |
284167a5 S |
459 | #else |
460 | # define RX_ISTAINTED(prog) (RX_EXTFLAGS(prog) & RXf_TAINTED) | |
461 | # define RX_TAINT_on(prog) (RX_EXTFLAGS(prog) |= RXf_TAINTED) | |
272d35c9 DM |
462 | # define RXp_MATCH_TAINTED(prog) (RXp_EXTFLAGS(prog) & RXf_TAINTED_SEEN) |
463 | # define RX_MATCH_TAINTED(prog) (RX_EXTFLAGS(prog) & RXf_TAINTED_SEEN) | |
464 | # define RXp_MATCH_TAINTED_on(prog) (RXp_EXTFLAGS(prog) |= RXf_TAINTED_SEEN) | |
465 | # define RX_MATCH_TAINTED_on(prog) (RX_EXTFLAGS(prog) |= RXf_TAINTED_SEEN) | |
466 | # define RX_MATCH_TAINTED_off(prog) (RX_EXTFLAGS(prog) &= ~RXf_TAINTED_SEEN) | |
284167a5 S |
467 | #endif |
468 | ||
bbe252da | 469 | #define RX_HAS_CUTGROUP(prog) ((prog)->intflags & PREGf_CUTGROUP_SEEN) |
72311751 GS |
470 | #define RX_MATCH_TAINTED_set(prog, t) ((t) \ |
471 | ? RX_MATCH_TAINTED_on(prog) \ | |
472 | : RX_MATCH_TAINTED_off(prog)) | |
c277df42 | 473 | |
07bc277f NC |
474 | #define RXp_MATCH_COPIED(prog) (RXp_EXTFLAGS(prog) & RXf_COPY_DONE) |
475 | #define RX_MATCH_COPIED(prog) (RX_EXTFLAGS(prog) & RXf_COPY_DONE) | |
476 | #define RXp_MATCH_COPIED_on(prog) (RXp_EXTFLAGS(prog) |= RXf_COPY_DONE) | |
477 | #define RX_MATCH_COPIED_on(prog) (RX_EXTFLAGS(prog) |= RXf_COPY_DONE) | |
478 | #define RXp_MATCH_COPIED_off(prog) (RXp_EXTFLAGS(prog) &= ~RXf_COPY_DONE) | |
479 | #define RX_MATCH_COPIED_off(prog) (RX_EXTFLAGS(prog) &= ~RXf_COPY_DONE) | |
cf93c79d IZ |
480 | #define RX_MATCH_COPIED_set(prog,t) ((t) \ |
481 | ? RX_MATCH_COPIED_on(prog) \ | |
482 | : RX_MATCH_COPIED_off(prog)) | |
f9f4320a | 483 | |
07bc277f | 484 | #define RXp_EXTFLAGS(rx) ((rx)->extflags) |
dbc200c5 | 485 | #define RXp_COMPFLAGS(rx) ((rx)->compflags) |
866c78d1 | 486 | |
07bc277f | 487 | /* For source compatibility. We used to store these explicitly. */ |
8d919b0a FC |
488 | #define RX_PRECOMP(prog) (RX_WRAPPED(prog) + ReANY(prog)->pre_prefix) |
489 | #define RX_PRECOMP_const(prog) (RX_WRAPPED_const(prog) + ReANY(prog)->pre_prefix) | |
5509d87a NC |
490 | /* FIXME? Are we hardcoding too much here and constraining plugin extension |
491 | writers? Specifically, the value 1 assumes that the wrapped version always | |
492 | has exactly one character at the end, a ')'. Will that always be true? */ | |
8d919b0a FC |
493 | #define RX_PRELEN(prog) (RX_WRAPLEN(prog) - ReANY(prog)->pre_prefix - 1) |
494 | #define RX_WRAPPED(prog) ReANY(prog)->xpv_len_u.xpvlenu_pv | |
495 | #define RX_WRAPPED_const(prog) ((const char *)RX_WRAPPED(prog)) | |
9d17798d | 496 | #define RX_WRAPLEN(prog) SvCUR(prog) |
8d919b0a | 497 | #define RX_CHECK_SUBSTR(prog) (ReANY(prog)->check_substr) |
288b8c02 | 498 | #define RX_REFCNT(prog) SvREFCNT(prog) |
8d919b0a | 499 | #define RX_EXTFLAGS(prog) RXp_EXTFLAGS(ReANY(prog)) |
dbc200c5 | 500 | #define RX_COMPFLAGS(prog) RXp_COMPFLAGS(ReANY(prog)) |
8d919b0a FC |
501 | #define RX_ENGINE(prog) (ReANY(prog)->engine) |
502 | #define RX_SUBBEG(prog) (ReANY(prog)->subbeg) | |
503 | #define RX_SUBOFFSET(prog) (ReANY(prog)->suboffset) | |
504 | #define RX_SUBCOFFSET(prog) (ReANY(prog)->subcoffset) | |
505 | #define RX_OFFS(prog) (ReANY(prog)->offs) | |
506 | #define RX_NPARENS(prog) (ReANY(prog)->nparens) | |
507 | #define RX_SUBLEN(prog) (ReANY(prog)->sublen) | |
508 | #define RX_MINLEN(prog) (ReANY(prog)->minlen) | |
509 | #define RX_MINLENRET(prog) (ReANY(prog)->minlenret) | |
510 | #define RX_GOFS(prog) (ReANY(prog)->gofs) | |
511 | #define RX_LASTPAREN(prog) (ReANY(prog)->lastparen) | |
512 | #define RX_LASTCLOSEPAREN(prog) (ReANY(prog)->lastcloseparen) | |
513 | #define RX_SAVED_COPY(prog) (ReANY(prog)->saved_copy) | |
03c83e26 DM |
514 | /* last match was zero-length */ |
515 | #define RX_ZERO_LEN(prog) \ | |
99a90e59 FC |
516 | (RX_OFFS(prog)[0].start + (SSize_t)RX_GOFS(prog) \ |
517 | == RX_OFFS(prog)[0].end) | |
220fc49f | 518 | |
be8e71aa YO |
519 | #endif /* PLUGGABLE_RE_EXTENSION */ |
520 | ||
486ec47a | 521 | /* Stuff that needs to be included in the pluggable extension goes below here */ |
be8e71aa | 522 | |
db2c6cb3 | 523 | #ifdef PERL_ANY_COW |
ed252734 | 524 | #define RX_MATCH_COPY_FREE(rx) \ |
bdd9a1b1 NC |
525 | STMT_START {if (RX_SAVED_COPY(rx)) { \ |
526 | SV_CHECK_THINKFIRST_COW_DROP(RX_SAVED_COPY(rx)); \ | |
ed252734 NC |
527 | } \ |
528 | if (RX_MATCH_COPIED(rx)) { \ | |
07bc277f | 529 | Safefree(RX_SUBBEG(rx)); \ |
ed252734 NC |
530 | RX_MATCH_COPIED_off(rx); \ |
531 | }} STMT_END | |
532 | #else | |
533 | #define RX_MATCH_COPY_FREE(rx) \ | |
534 | STMT_START {if (RX_MATCH_COPIED(rx)) { \ | |
07bc277f | 535 | Safefree(RX_SUBBEG(rx)); \ |
ed252734 NC |
536 | RX_MATCH_COPIED_off(rx); \ |
537 | }} STMT_END | |
538 | #endif | |
539 | ||
07bc277f NC |
540 | #define RXp_MATCH_UTF8(prog) (RXp_EXTFLAGS(prog) & RXf_MATCH_UTF8) |
541 | #define RX_MATCH_UTF8(prog) (RX_EXTFLAGS(prog) & RXf_MATCH_UTF8) | |
542 | #define RX_MATCH_UTF8_on(prog) (RX_EXTFLAGS(prog) |= RXf_MATCH_UTF8) | |
543 | #define RX_MATCH_UTF8_off(prog) (RX_EXTFLAGS(prog) &= ~RXf_MATCH_UTF8) | |
a30b2f1f | 544 | #define RX_MATCH_UTF8_set(prog, t) ((t) \ |
0603fe5c DM |
545 | ? RX_MATCH_UTF8_on(prog) \ |
546 | : RX_MATCH_UTF8_off(prog)) | |
efd26800 NC |
547 | |
548 | /* Whether the pattern stored at RX_WRAPPED is in UTF-8 */ | |
8f6ae13c | 549 | #define RX_UTF8(prog) SvUTF8(prog) |
7948fc08 | 550 | |
a340edde DM |
551 | |
552 | /* bits in flags arg of Perl_regexec_flags() */ | |
553 | ||
554 | #define REXEC_COPY_STR 0x01 /* Need to copy the string for captures. */ | |
555 | #define REXEC_CHECKED 0x02 /* re_intuit_start() already called. */ | |
556 | #define REXEC_SCREAM 0x04 /* currently unused. */ | |
557 | #define REXEC_IGNOREPOS 0x08 /* use stringarg, not pos(), for \G match */ | |
558 | #define REXEC_NOT_FIRST 0x10 /* This is another iteration of //g: | |
559 | no need to copy string again */ | |
560 | ||
561 | /* under REXEC_COPY_STR, it's ok for the | |
562 | engine (modulo PL_sawamperand etc) | |
563 | to skip copying: ... */ | |
564 | #define REXEC_COPY_SKIP_PRE 0x20 /* ...the $` part of the string, or */ | |
565 | #define REXEC_COPY_SKIP_POST 0x40 /* ...the $' part of the string */ | |
d5e7783a DM |
566 | #define REXEC_FAIL_ON_UNDERFLOW 0x80 /* fail the match if $& would start before |
567 | the start pos (so s/.\G// would fail | |
568 | on second iteration */ | |
c277df42 | 569 | |
7fe44985 | 570 | #if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN) |
288b8c02 NC |
571 | # define ReREFCNT_inc(re) \ |
572 | ({ \ | |
573 | /* This is here to generate a casting warning if incorrect. */ \ | |
7948fc08 RU |
574 | REGEXP *const _rerefcnt_inc = (re); \ |
575 | assert(SvTYPE(_rerefcnt_inc) == SVt_REGEXP); \ | |
576 | SvREFCNT_inc(_rerefcnt_inc); \ | |
577 | _rerefcnt_inc; \ | |
288b8c02 NC |
578 | }) |
579 | # define ReREFCNT_dec(re) \ | |
580 | ({ \ | |
581 | /* This is here to generate a casting warning if incorrect. */ \ | |
7948fc08 RU |
582 | REGEXP *const _rerefcnt_dec = (re); \ |
583 | SvREFCNT_dec(_rerefcnt_dec); \ | |
288b8c02 NC |
584 | }) |
585 | #else | |
586 | # define ReREFCNT_dec(re) SvREFCNT_dec(re) | |
b7e0bd9e | 587 | # define ReREFCNT_inc(re) ((REGEXP *) SvREFCNT_inc(re)) |
288b8c02 | 588 | #endif |
8d919b0a | 589 | #define ReANY(re) S_ReANY((const REGEXP *)(re)) |
288b8c02 NC |
590 | |
591 | /* FIXME for plugins. */ | |
cf93c79d IZ |
592 | |
593 | #define FBMcf_TAIL_DOLLAR 1 | |
cad2e5aa JH |
594 | #define FBMcf_TAIL_DOLLARM 2 |
595 | #define FBMcf_TAIL_Z 4 | |
596 | #define FBMcf_TAIL_z 8 | |
597 | #define FBMcf_TAIL (FBMcf_TAIL_DOLLAR|FBMcf_TAIL_DOLLARM|FBMcf_TAIL_Z|FBMcf_TAIL_z) | |
cf93c79d IZ |
598 | |
599 | #define FBMrf_MULTILINE 1 | |
cad2e5aa | 600 | |
331b2dcc DM |
601 | struct regmatch_state; |
602 | struct regmatch_slab; | |
8adc0f72 | 603 | |
bf2039a9 DM |
604 | /* like regmatch_info_aux, but contains extra fields only needed if the |
605 | * pattern contains (?{}). If used, is snuck into the second slot in the | |
606 | * regmatch_state stack at the start of execution */ | |
8adc0f72 DM |
607 | |
608 | typedef struct { | |
609 | regexp *rex; | |
610 | PMOP *curpm; /* saved PL_curpm */ | |
611 | #ifdef PERL_ANY_COW | |
612 | SV *saved_copy; /* saved saved_copy field from rex */ | |
613 | #endif | |
614 | char *subbeg; /* saved subbeg field from rex */ | |
615 | STRLEN sublen; /* saved sublen field from rex */ | |
616 | STRLEN suboffset; /* saved suboffset field from rex */ | |
617 | STRLEN subcoffset; /* saved subcoffset field from rex */ | |
618 | MAGIC *pos_magic; /* pos() magic attached to $_ */ | |
ea3daa5d | 619 | SSize_t pos; /* the original value of pos() in pos_magic */ |
25fdce4a | 620 | U8 pos_flags; /* flags to be restored; currently only MGf_BYTES*/ |
bf2039a9 DM |
621 | } regmatch_info_aux_eval; |
622 | ||
623 | ||
624 | /* fields that logically live in regmatch_info, but which need cleaning | |
625 | * up on croak(), and so are instead are snuck into the first slot in | |
626 | * the regmatch_state stack at the start of execution */ | |
627 | ||
628 | typedef struct { | |
629 | regmatch_info_aux_eval *info_aux_eval; | |
331b2dcc DM |
630 | struct regmatch_state *old_regmatch_state; /* saved PL_regmatch_state */ |
631 | struct regmatch_slab *old_regmatch_slab; /* saved PL_regmatch_slab */ | |
2ac8ff4b | 632 | char *poscache; /* S-L cache of fail positions of WHILEMs */ |
bf2039a9 DM |
633 | } regmatch_info_aux; |
634 | ||
8adc0f72 | 635 | |
3b0527fe | 636 | /* some basic information about the current match that is created by |
bf2039a9 DM |
637 | * Perl_regexec_flags and then passed to regtry(), regmatch() etc. |
638 | * It is allocated as a local var on the stack, so nothing should be | |
639 | * stored in it that needs preserving or clearing up on croak(). | |
640 | * For that, see the aux_info and aux_info_eval members of the | |
641 | * regmatch_state union. */ | |
3b0527fe DM |
642 | |
643 | typedef struct { | |
28d03b21 | 644 | REGEXP *prog; /* the regex being executed */ |
9d9163fb | 645 | const char * strbeg; /* real start of string */ |
28d03b21 DM |
646 | char *strend; /* one byte beyond last char of match string */ |
647 | char *till; /* matches shorter than this fail (see minlen arg) */ | |
648 | SV *sv; /* the SV string currently being matched */ | |
649 | char *ganch; /* position of \G anchor */ | |
650 | char *cutpoint; /* (*COMMIT) position (if any) */ | |
bf2039a9 DM |
651 | regmatch_info_aux *info_aux; /* extra fields that need cleanup */ |
652 | regmatch_info_aux_eval *info_aux_eval; /* extra saved state for (?{}) */ | |
1cb48e53 DM |
653 | I32 poscache_maxiter; /* how many whilems todo before S-L cache kicks in */ |
654 | I32 poscache_iter; /* current countdown from _maxiter to zero */ | |
2ac8ff4b | 655 | STRLEN poscache_size; /* size of regmatch_info_aux.poscache */ |
02d5137b | 656 | bool intuit; /* re_intuit_start() is the top-level caller */ |
ba44c216 DM |
657 | bool is_utf8_pat; /* regex is utf8 */ |
658 | bool is_utf8_target; /* string being matched is utf8 */ | |
39819bd9 | 659 | bool warned; /* we have issued a recursion warning; no need for more */ |
3b0527fe DM |
660 | } regmatch_info; |
661 | ||
5d9a96ca DM |
662 | |
663 | /* structures for holding and saving the state maintained by regmatch() */ | |
664 | ||
d56b3014 | 665 | #ifndef MAX_RECURSE_EVAL_NOCHANGE_DEPTH |
ba6840fb | 666 | #define MAX_RECURSE_EVAL_NOCHANGE_DEPTH 10 |
d56b3014 | 667 | #endif |
6bda09f9 | 668 | |
5d9a96ca DM |
669 | typedef I32 CHECKPOINT; |
670 | ||
a0374537 | 671 | typedef struct regmatch_state { |
40a82448 | 672 | int resume_state; /* where to jump to on return */ |
24d3c4a9 | 673 | char *locinput; /* where to backtrack in string on failure */ |
e822a8b4 DM |
674 | |
675 | union { | |
77cb431f | 676 | |
bf2039a9 DM |
677 | /* the 'info_aux' and 'info_aux_eval' union members are cuckoos in |
678 | * the nest. They aren't saved backtrack state; rather they | |
679 | * represent one or two extra chunks of data that need allocating | |
680 | * at the start of a match. These fields would logically live in | |
681 | * the regmatch_info struct, except that is allocated on the | |
682 | * C stack, and these fields are all things that require cleanup | |
683 | * after a croak(), when the stack is lost. | |
684 | * As a convenience, we just use the first 1 or 2 regmatch_state | |
685 | * slots to store this info, as we will be allocating a slab of | |
686 | * these anyway. Otherwise we'd have to malloc and then free them, | |
687 | * or allocate them on the save stack (where they will get | |
688 | * realloced if the save stack grows). | |
689 | * info_aux contains the extra fields that are always needed; | |
690 | * info_aux_eval contains extra fields that only needed if | |
691 | * the pattern contains code blocks | |
692 | * We split them into two separate structs to avoid increasing | |
693 | * the size of the union. | |
694 | */ | |
695 | ||
696 | regmatch_info_aux info_aux; | |
697 | ||
698 | regmatch_info_aux_eval info_aux_eval; | |
699 | ||
77cb431f DM |
700 | /* this is a fake union member that matches the first element |
701 | * of each member that needs to store positive backtrack | |
702 | * information */ | |
703 | struct { | |
704 | struct regmatch_state *prev_yes_state; | |
705 | } yes; | |
706 | ||
fae667d5 YO |
707 | /* branchlike members */ |
708 | /* this is a fake union member that matches the first elements | |
709 | * of each member that needs to behave like a branch */ | |
710 | struct { | |
5d458dd8 YO |
711 | /* this first element must match u.yes */ |
712 | struct regmatch_state *prev_yes_state; | |
fae667d5 | 713 | U32 lastparen; |
f6033a9d | 714 | U32 lastcloseparen; |
fae667d5 YO |
715 | CHECKPOINT cp; |
716 | ||
717 | } branchlike; | |
718 | ||
719 | struct { | |
720 | /* the first elements must match u.branchlike */ | |
721 | struct regmatch_state *prev_yes_state; | |
722 | U32 lastparen; | |
f6033a9d | 723 | U32 lastcloseparen; |
fae667d5 YO |
724 | CHECKPOINT cp; |
725 | ||
726 | regnode *next_branch; /* next branch node */ | |
727 | } branch; | |
728 | ||
729 | struct { | |
730 | /* the first elements must match u.branchlike */ | |
731 | struct regmatch_state *prev_yes_state; | |
732 | U32 lastparen; | |
f6033a9d | 733 | U32 lastcloseparen; |
fae667d5 YO |
734 | CHECKPOINT cp; |
735 | ||
2e64971a | 736 | U32 accepted; /* how many accepting states left */ |
6603fe3e | 737 | bool longfold;/* saw a fold with a 1->n char mapping */ |
7f69552c | 738 | U16 *jump; /* positive offsets from me */ |
7f69552c | 739 | regnode *me; /* Which node am I - needed for jump tries*/ |
2e64971a DM |
740 | U8 *firstpos;/* pos in string of first trie match */ |
741 | U32 firstchars;/* len in chars of firstpos from start */ | |
742 | U16 nextword;/* next word to try */ | |
743 | U16 topword; /* longest accepted word */ | |
e822a8b4 DM |
744 | } trie; |
745 | ||
fae667d5 YO |
746 | /* special types - these members are used to store state for special |
747 | regops like eval, if/then, lookaround and the markpoint state */ | |
e822a8b4 | 748 | struct { |
77cb431f DM |
749 | /* this first element must match u.yes */ |
750 | struct regmatch_state *prev_yes_state; | |
faec1544 | 751 | struct regmatch_state *prev_curlyx; |
d1c49ad5 | 752 | struct regmatch_state *prev_eval; |
288b8c02 | 753 | REGEXP *prev_rex; |
aa283a38 DM |
754 | CHECKPOINT cp; /* remember current savestack indexes */ |
755 | CHECKPOINT lastcp; | |
24be3102 | 756 | U32 close_paren; /* which close bracket is our end (+1) */ |
1b5c067c | 757 | regnode *B; /* the node following us */ |
ba6840fb | 758 | char *prev_recurse_locinput; |
e822a8b4 DM |
759 | } eval; |
760 | ||
761 | struct { | |
c476f425 | 762 | /* this first element must match u.yes */ |
262b90c4 | 763 | struct regmatch_state *prev_yes_state; |
fae667d5 YO |
764 | I32 wanted; |
765 | I32 logical; /* saved copy of 'logical' var */ | |
766 | regnode *me; /* the IFMATCH/SUSPEND/UNLESSM node */ | |
767 | } ifmatch; /* and SUSPEND/UNLESSM */ | |
768 | ||
769 | struct { | |
770 | /* this first element must match u.yes */ | |
771 | struct regmatch_state *prev_yes_state; | |
772 | struct regmatch_state *prev_mark; | |
773 | SV* mark_name; | |
774 | char *mark_loc; | |
775 | } mark; | |
776 | ||
777 | struct { | |
778 | int val; | |
779 | } keeper; | |
780 | ||
781 | /* quantifiers - these members are used for storing state for | |
782 | for the regops used to implement quantifiers */ | |
783 | struct { | |
784 | /* this first element must match u.yes */ | |
785 | struct regmatch_state *prev_yes_state; | |
c476f425 | 786 | struct regmatch_state *prev_curlyx; /* previous cur_curlyx */ |
d02d6d97 DM |
787 | regnode *me; /* the CURLYX node */ |
788 | regnode *B; /* the B node in /A*B/ */ | |
c476f425 DM |
789 | CHECKPOINT cp; /* remember current savestack index */ |
790 | bool minmod; | |
a0374537 | 791 | int parenfloor;/* how far back to strip paren data */ |
c476f425 DM |
792 | |
793 | /* these two are modified by WHILEM */ | |
794 | int count; /* how many instances of A we've matched */ | |
795 | char *lastloc;/* where previous A matched (0-len detect) */ | |
e822a8b4 DM |
796 | } curlyx; |
797 | ||
798 | struct { | |
c476f425 | 799 | /* this first element must match u.yes */ |
262b90c4 | 800 | struct regmatch_state *prev_yes_state; |
c476f425 DM |
801 | struct regmatch_state *save_curlyx; |
802 | CHECKPOINT cp; /* remember current savestack indexes */ | |
803 | CHECKPOINT lastcp; | |
804 | char *save_lastloc; /* previous curlyx.lastloc */ | |
805 | I32 cache_offset; | |
806 | I32 cache_mask; | |
e822a8b4 DM |
807 | } whilem; |
808 | ||
809 | struct { | |
5d458dd8 YO |
810 | /* this first element must match u.yes */ |
811 | struct regmatch_state *prev_yes_state; | |
79a2a0e8 | 812 | int c1, c2; /* case fold search */ |
40a82448 | 813 | CHECKPOINT cp; |
f6033a9d DM |
814 | U32 lastparen; |
815 | U32 lastcloseparen; | |
40a82448 DM |
816 | I32 alen; /* length of first-matched A string */ |
817 | I32 count; | |
0cadcf80 | 818 | bool minmod; |
40a82448 DM |
819 | regnode *A, *B; /* the nodes corresponding to /A*B/ */ |
820 | regnode *me; /* the curlym node */ | |
79a2a0e8 KW |
821 | U8 c1_utf8[UTF8_MAXBYTES+1]; /* */ |
822 | U8 c2_utf8[UTF8_MAXBYTES+1]; | |
e822a8b4 DM |
823 | } curlym; |
824 | ||
825 | struct { | |
3b6647e0 | 826 | U32 paren; |
c255a977 | 827 | CHECKPOINT cp; |
f6033a9d DM |
828 | U32 lastparen; |
829 | U32 lastcloseparen; | |
79a2a0e8 | 830 | int c1, c2; /* case fold search */ |
c255a977 DM |
831 | char *maxpos; /* highest possible point in string to match */ |
832 | char *oldloc; /* the previous locinput */ | |
e822a8b4 | 833 | int count; |
c255a977 DM |
834 | int min, max; /* {m,n} */ |
835 | regnode *A, *B; /* the nodes corresponding to /A*B/ */ | |
79a2a0e8 KW |
836 | U8 c1_utf8[UTF8_MAXBYTES+1]; /* */ |
837 | U8 c2_utf8[UTF8_MAXBYTES+1]; | |
c255a977 | 838 | } curly; /* and CURLYN/PLUS/STAR */ |
dad79028 | 839 | |
d8319b27 | 840 | } u; |
5d9a96ca DM |
841 | } regmatch_state; |
842 | ||
ce12e254 | 843 | |
d5a00e4a | 844 | |
5d9a96ca DM |
845 | /* how many regmatch_state structs to allocate as a single slab. |
846 | * We do it in 4K blocks for efficiency. The "3" is 2 for the next/prev | |
847 | * pointers, plus 1 for any mythical malloc overhead. */ | |
848 | ||
849 | #define PERL_REGMATCH_SLAB_SLOTS \ | |
850 | ((4096 - 3 * sizeof (void*)) / sizeof(regmatch_state)) | |
851 | ||
852 | typedef struct regmatch_slab { | |
853 | regmatch_state states[PERL_REGMATCH_SLAB_SLOTS]; | |
854 | struct regmatch_slab *prev, *next; | |
855 | } regmatch_slab; | |
1ade1aa1 | 856 | |
46ab3289 | 857 | |
cde0cee5 | 858 | |
1ade1aa1 | 859 | /* |
14d04a33 | 860 | * ex: set ts=8 sts=4 sw=4 et: |
1ade1aa1 | 861 | */ |