Commit | Line | Data |
---|---|---|
a0d0e21e LW |
1 | /* regcomp.c |
2 | */ | |
3 | ||
4 | /* | |
5 | * "A fair jaw-cracker dwarf-language must be." --Samwise Gamgee | |
6 | */ | |
7 | ||
61296642 DM |
8 | /* This file contains functions for compiling a regular expression. See |
9 | * also regexec.c which funnily enough, contains functions for executing | |
166f8a29 | 10 | * a regular expression. |
e4a054ea DM |
11 | * |
12 | * This file is also copied at build time to ext/re/re_comp.c, where | |
13 | * it's built with -DPERL_EXT_RE_BUILD -DPERL_EXT_RE_DEBUG -DPERL_EXT. | |
14 | * This causes the main functions to be compiled under new names and with | |
15 | * debugging support added, which makes "use re 'debug'" work. | |
166f8a29 DM |
16 | */ |
17 | ||
a687059c LW |
18 | /* NOTE: this is derived from Henry Spencer's regexp code, and should not |
19 | * confused with the original package (see point 3 below). Thanks, Henry! | |
20 | */ | |
21 | ||
22 | /* Additional note: this code is very heavily munged from Henry's version | |
23 | * in places. In some spots I've traded clarity for efficiency, so don't | |
24 | * blame Henry for some of the lack of readability. | |
25 | */ | |
26 | ||
e50aee73 AD |
27 | /* The names of the functions have been changed from regcomp and |
28 | * regexec to pregcomp and pregexec in order to avoid conflicts | |
29 | * with the POSIX routines of the same names. | |
30 | */ | |
31 | ||
b9d5759e | 32 | #ifdef PERL_EXT_RE_BUILD |
54df2634 | 33 | #include "re_top.h" |
b81d288d | 34 | #endif |
56953603 | 35 | |
a687059c | 36 | /* |
e50aee73 | 37 | * pregcomp and pregexec -- regsub and regerror are not used in perl |
a687059c LW |
38 | * |
39 | * Copyright (c) 1986 by University of Toronto. | |
40 | * Written by Henry Spencer. Not derived from licensed software. | |
41 | * | |
42 | * Permission is granted to anyone to use this software for any | |
43 | * purpose on any computer system, and to redistribute it freely, | |
44 | * subject to the following restrictions: | |
45 | * | |
46 | * 1. The author is not responsible for the consequences of use of | |
47 | * this software, no matter how awful, even if they arise | |
48 | * from defects in it. | |
49 | * | |
50 | * 2. The origin of this software must not be misrepresented, either | |
51 | * by explicit claim or by omission. | |
52 | * | |
53 | * 3. Altered versions must be plainly marked as such, and must not | |
54 | * be misrepresented as being the original software. | |
55 | * | |
56 | * | |
57 | **** Alterations to Henry's code are... | |
58 | **** | |
4bb101f2 | 59 | **** Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
b94e2f88 | 60 | **** 2000, 2001, 2002, 2003, 2004, 2005, 2006, by Larry Wall and others |
a687059c | 61 | **** |
9ef589d8 LW |
62 | **** You may distribute under the terms of either the GNU General Public |
63 | **** License or the Artistic License, as specified in the README file. | |
64 | ||
a687059c LW |
65 | * |
66 | * Beware that some of this code is subtly aware of the way operator | |
67 | * precedence is structured in regular expressions. Serious changes in | |
68 | * regular-expression syntax might require a total rethink. | |
69 | */ | |
70 | #include "EXTERN.h" | |
864dbfa3 | 71 | #define PERL_IN_REGCOMP_C |
a687059c | 72 | #include "perl.h" |
d06ea78c | 73 | |
acfe0abc | 74 | #ifndef PERL_IN_XSUB_RE |
d06ea78c GS |
75 | # include "INTERN.h" |
76 | #endif | |
c277df42 IZ |
77 | |
78 | #define REG_COMP_C | |
54df2634 NC |
79 | #ifdef PERL_IN_XSUB_RE |
80 | # include "re_comp.h" | |
81 | #else | |
82 | # include "regcomp.h" | |
83 | #endif | |
a687059c | 84 | |
d4cce5f1 | 85 | #ifdef op |
11343788 | 86 | #undef op |
d4cce5f1 | 87 | #endif /* op */ |
11343788 | 88 | |
fe14fcc3 | 89 | #ifdef MSDOS |
7e4e8c89 | 90 | # if defined(BUGGY_MSC6) |
fe14fcc3 | 91 | /* MSC 6.00A breaks on op/regexp.t test 85 unless we turn this off */ |
7e4e8c89 | 92 | # pragma optimize("a",off) |
fe14fcc3 | 93 | /* But MSC 6.00A is happy with 'w', for aliases only across function calls*/ |
7e4e8c89 NC |
94 | # pragma optimize("w",on ) |
95 | # endif /* BUGGY_MSC6 */ | |
fe14fcc3 LW |
96 | #endif /* MSDOS */ |
97 | ||
a687059c LW |
98 | #ifndef STATIC |
99 | #define STATIC static | |
100 | #endif | |
101 | ||
830247a4 | 102 | typedef struct RExC_state_t { |
e2509266 | 103 | U32 flags; /* are we folding, multilining? */ |
830247a4 IZ |
104 | char *precomp; /* uncompiled string. */ |
105 | regexp *rx; | |
fac92740 | 106 | char *start; /* Start of input for compile */ |
830247a4 IZ |
107 | char *end; /* End of input for compile */ |
108 | char *parse; /* Input-scan pointer. */ | |
109 | I32 whilem_seen; /* number of WHILEM in this expr */ | |
fac92740 | 110 | regnode *emit_start; /* Start of emitted-code area */ |
ffc61ed2 | 111 | regnode *emit; /* Code-emit pointer; ®dummy = don't = compiling */ |
830247a4 IZ |
112 | I32 naughty; /* How bad is this pattern? */ |
113 | I32 sawback; /* Did we see \1, ...? */ | |
114 | U32 seen; | |
115 | I32 size; /* Code size. */ | |
116 | I32 npar; /* () count. */ | |
117 | I32 extralen; | |
118 | I32 seen_zerolen; | |
119 | I32 seen_evals; | |
6bda09f9 | 120 | regnode **parens; /* offsets of each paren */ |
1aa99e6b | 121 | I32 utf8; |
6bda09f9 | 122 | HV *charnames; /* cache of named sequences */ |
81714fb9 | 123 | HV *paren_names; /* Paren names */ |
830247a4 IZ |
124 | #if ADD_TO_REGEXEC |
125 | char *starttry; /* -Dr: where regtry was called. */ | |
126 | #define RExC_starttry (pRExC_state->starttry) | |
127 | #endif | |
3dab1dad | 128 | #ifdef DEBUGGING |
be8e71aa | 129 | const char *lastparse; |
3dab1dad YO |
130 | I32 lastnum; |
131 | #define RExC_lastparse (pRExC_state->lastparse) | |
132 | #define RExC_lastnum (pRExC_state->lastnum) | |
133 | #endif | |
830247a4 IZ |
134 | } RExC_state_t; |
135 | ||
e2509266 | 136 | #define RExC_flags (pRExC_state->flags) |
830247a4 IZ |
137 | #define RExC_precomp (pRExC_state->precomp) |
138 | #define RExC_rx (pRExC_state->rx) | |
fac92740 | 139 | #define RExC_start (pRExC_state->start) |
830247a4 IZ |
140 | #define RExC_end (pRExC_state->end) |
141 | #define RExC_parse (pRExC_state->parse) | |
142 | #define RExC_whilem_seen (pRExC_state->whilem_seen) | |
fac92740 | 143 | #define RExC_offsets (pRExC_state->rx->offsets) /* I am not like the others */ |
830247a4 | 144 | #define RExC_emit (pRExC_state->emit) |
fac92740 | 145 | #define RExC_emit_start (pRExC_state->emit_start) |
830247a4 IZ |
146 | #define RExC_naughty (pRExC_state->naughty) |
147 | #define RExC_sawback (pRExC_state->sawback) | |
148 | #define RExC_seen (pRExC_state->seen) | |
149 | #define RExC_size (pRExC_state->size) | |
150 | #define RExC_npar (pRExC_state->npar) | |
151 | #define RExC_extralen (pRExC_state->extralen) | |
152 | #define RExC_seen_zerolen (pRExC_state->seen_zerolen) | |
153 | #define RExC_seen_evals (pRExC_state->seen_evals) | |
1aa99e6b | 154 | #define RExC_utf8 (pRExC_state->utf8) |
fc8cd66c | 155 | #define RExC_charnames (pRExC_state->charnames) |
6bda09f9 | 156 | #define RExC_parens (pRExC_state->parens) |
81714fb9 | 157 | #define RExC_paren_names (pRExC_state->paren_names) |
830247a4 | 158 | |
a687059c LW |
159 | #define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?') |
160 | #define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \ | |
161 | ((*s) == '{' && regcurly(s))) | |
a687059c | 162 | |
35c8bce7 LW |
163 | #ifdef SPSTART |
164 | #undef SPSTART /* dratted cpp namespace... */ | |
165 | #endif | |
a687059c LW |
166 | /* |
167 | * Flags to be passed up and down. | |
168 | */ | |
a687059c | 169 | #define WORST 0 /* Worst case. */ |
821b33a5 | 170 | #define HASWIDTH 0x1 /* Known to match non-null strings. */ |
a0d0e21e LW |
171 | #define SIMPLE 0x2 /* Simple enough to be STAR/PLUS operand. */ |
172 | #define SPSTART 0x4 /* Starts with * or +. */ | |
173 | #define TRYAGAIN 0x8 /* Weeded out a declaration. */ | |
a687059c | 174 | |
3dab1dad YO |
175 | #define REG_NODE_NUM(x) ((x) ? (int)((x)-RExC_emit_start) : -1) |
176 | ||
07be1b83 YO |
177 | /* whether trie related optimizations are enabled */ |
178 | #if PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION | |
179 | #define TRIE_STUDY_OPT | |
786e8c11 | 180 | #define FULL_TRIE_STUDY |
07be1b83 YO |
181 | #define TRIE_STCLASS |
182 | #endif | |
1de06328 YO |
183 | |
184 | ||
185 | /* About scan_data_t. | |
186 | ||
187 | During optimisation we recurse through the regexp program performing | |
188 | various inplace (keyhole style) optimisations. In addition study_chunk | |
189 | and scan_commit populate this data structure with information about | |
190 | what strings MUST appear in the pattern. We look for the longest | |
191 | string that must appear for at a fixed location, and we look for the | |
192 | longest string that may appear at a floating location. So for instance | |
193 | in the pattern: | |
194 | ||
195 | /FOO[xX]A.*B[xX]BAR/ | |
196 | ||
197 | Both 'FOO' and 'A' are fixed strings. Both 'B' and 'BAR' are floating | |
198 | strings (because they follow a .* construct). study_chunk will identify | |
199 | both FOO and BAR as being the longest fixed and floating strings respectively. | |
200 | ||
201 | The strings can be composites, for instance | |
202 | ||
203 | /(f)(o)(o)/ | |
204 | ||
205 | will result in a composite fixed substring 'foo'. | |
206 | ||
207 | For each string some basic information is maintained: | |
208 | ||
209 | - offset or min_offset | |
210 | This is the position the string must appear at, or not before. | |
211 | It also implicitly (when combined with minlenp) tells us how many | |
212 | character must match before the string we are searching. | |
213 | Likewise when combined with minlenp and the length of the string | |
214 | tells us how many characters must appear after the string we have | |
215 | found. | |
216 | ||
217 | - max_offset | |
218 | Only used for floating strings. This is the rightmost point that | |
219 | the string can appear at. Ifset to I32 max it indicates that the | |
220 | string can occur infinitely far to the right. | |
221 | ||
222 | - minlenp | |
223 | A pointer to the minimum length of the pattern that the string | |
224 | was found inside. This is important as in the case of positive | |
225 | lookahead or positive lookbehind we can have multiple patterns | |
226 | involved. Consider | |
227 | ||
228 | /(?=FOO).*F/ | |
229 | ||
230 | The minimum length of the pattern overall is 3, the minimum length | |
231 | of the lookahead part is 3, but the minimum length of the part that | |
232 | will actually match is 1. So 'FOO's minimum length is 3, but the | |
233 | minimum length for the F is 1. This is important as the minimum length | |
234 | is used to determine offsets in front of and behind the string being | |
235 | looked for. Since strings can be composites this is the length of the | |
236 | pattern at the time it was commited with a scan_commit. Note that | |
237 | the length is calculated by study_chunk, so that the minimum lengths | |
238 | are not known until the full pattern has been compiled, thus the | |
239 | pointer to the value. | |
240 | ||
241 | - lookbehind | |
242 | ||
243 | In the case of lookbehind the string being searched for can be | |
244 | offset past the start point of the final matching string. | |
245 | If this value was just blithely removed from the min_offset it would | |
246 | invalidate some of the calculations for how many chars must match | |
247 | before or after (as they are derived from min_offset and minlen and | |
248 | the length of the string being searched for). | |
249 | When the final pattern is compiled and the data is moved from the | |
250 | scan_data_t structure into the regexp structure the information | |
251 | about lookbehind is factored in, with the information that would | |
252 | have been lost precalculated in the end_shift field for the | |
253 | associated string. | |
254 | ||
255 | The fields pos_min and pos_delta are used to store the minimum offset | |
256 | and the delta to the maximum offset at the current point in the pattern. | |
257 | ||
258 | */ | |
2c2d71f5 JH |
259 | |
260 | typedef struct scan_data_t { | |
1de06328 YO |
261 | /*I32 len_min; unused */ |
262 | /*I32 len_delta; unused */ | |
2c2d71f5 JH |
263 | I32 pos_min; |
264 | I32 pos_delta; | |
265 | SV *last_found; | |
1de06328 | 266 | I32 last_end; /* min value, <0 unless valid. */ |
2c2d71f5 JH |
267 | I32 last_start_min; |
268 | I32 last_start_max; | |
1de06328 YO |
269 | SV **longest; /* Either &l_fixed, or &l_float. */ |
270 | SV *longest_fixed; /* longest fixed string found in pattern */ | |
271 | I32 offset_fixed; /* offset where it starts */ | |
272 | I32 *minlen_fixed; /* pointer to the minlen relevent to the string */ | |
273 | I32 lookbehind_fixed; /* is the position of the string modfied by LB */ | |
274 | SV *longest_float; /* longest floating string found in pattern */ | |
275 | I32 offset_float_min; /* earliest point in string it can appear */ | |
276 | I32 offset_float_max; /* latest point in string it can appear */ | |
277 | I32 *minlen_float; /* pointer to the minlen relevent to the string */ | |
278 | I32 lookbehind_float; /* is the position of the string modified by LB */ | |
2c2d71f5 JH |
279 | I32 flags; |
280 | I32 whilem_c; | |
cb434fcc | 281 | I32 *last_closep; |
653099ff | 282 | struct regnode_charclass_class *start_class; |
2c2d71f5 JH |
283 | } scan_data_t; |
284 | ||
a687059c | 285 | /* |
e50aee73 | 286 | * Forward declarations for pregcomp()'s friends. |
a687059c | 287 | */ |
a0d0e21e | 288 | |
27da23d5 | 289 | static const scan_data_t zero_scan_data = |
1de06328 | 290 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,0}; |
c277df42 IZ |
291 | |
292 | #define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL) | |
07be1b83 YO |
293 | #define SF_BEFORE_SEOL 0x0001 |
294 | #define SF_BEFORE_MEOL 0x0002 | |
c277df42 IZ |
295 | #define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL) |
296 | #define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL) | |
297 | ||
09b7f37c CB |
298 | #ifdef NO_UNARY_PLUS |
299 | # define SF_FIX_SHIFT_EOL (0+2) | |
300 | # define SF_FL_SHIFT_EOL (0+4) | |
301 | #else | |
302 | # define SF_FIX_SHIFT_EOL (+2) | |
303 | # define SF_FL_SHIFT_EOL (+4) | |
304 | #endif | |
c277df42 IZ |
305 | |
306 | #define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL) | |
307 | #define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL) | |
308 | ||
309 | #define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL) | |
310 | #define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */ | |
07be1b83 YO |
311 | #define SF_IS_INF 0x0040 |
312 | #define SF_HAS_PAR 0x0080 | |
313 | #define SF_IN_PAR 0x0100 | |
314 | #define SF_HAS_EVAL 0x0200 | |
315 | #define SCF_DO_SUBSTR 0x0400 | |
653099ff GS |
316 | #define SCF_DO_STCLASS_AND 0x0800 |
317 | #define SCF_DO_STCLASS_OR 0x1000 | |
318 | #define SCF_DO_STCLASS (SCF_DO_STCLASS_AND|SCF_DO_STCLASS_OR) | |
e1901655 | 319 | #define SCF_WHILEM_VISITED_POS 0x2000 |
c277df42 | 320 | |
786e8c11 YO |
321 | #define SCF_TRIE_RESTUDY 0x4000 /* Do restudy? */ |
322 | ||
07be1b83 | 323 | |
eb160463 | 324 | #define UTF (RExC_utf8 != 0) |
e2509266 JH |
325 | #define LOC ((RExC_flags & PMf_LOCALE) != 0) |
326 | #define FOLD ((RExC_flags & PMf_FOLD) != 0) | |
a0ed51b3 | 327 | |
ffc61ed2 | 328 | #define OOB_UNICODE 12345678 |
93733859 | 329 | #define OOB_NAMEDCLASS -1 |
b8c5462f | 330 | |
a0ed51b3 LW |
331 | #define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv)) |
332 | #define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b) | |
333 | ||
8615cb43 | 334 | |
b45f050a JF |
335 | /* length of regex to show in messages that don't mark a position within */ |
336 | #define RegexLengthToShowInErrorMessages 127 | |
337 | ||
338 | /* | |
339 | * If MARKER[12] are adjusted, be sure to adjust the constants at the top | |
340 | * of t/op/regmesg.t, the tests in t/op/re_tests, and those in | |
341 | * op/pragma/warn/regcomp. | |
342 | */ | |
7253e4e3 RK |
343 | #define MARKER1 "<-- HERE" /* marker as it appears in the description */ |
344 | #define MARKER2 " <-- HERE " /* marker as it appears within the regex */ | |
b81d288d | 345 | |
7253e4e3 | 346 | #define REPORT_LOCATION " in regex; marked by " MARKER1 " in m/%.*s" MARKER2 "%s/" |
b45f050a JF |
347 | |
348 | /* | |
349 | * Calls SAVEDESTRUCTOR_X if needed, then calls Perl_croak with the given | |
350 | * arg. Show regex, up to a maximum length. If it's too long, chop and add | |
351 | * "...". | |
352 | */ | |
ccb2c380 | 353 | #define FAIL(msg) STMT_START { \ |
bfed75c6 | 354 | const char *ellipses = ""; \ |
ccb2c380 MP |
355 | IV len = RExC_end - RExC_precomp; \ |
356 | \ | |
357 | if (!SIZE_ONLY) \ | |
358 | SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \ | |
359 | if (len > RegexLengthToShowInErrorMessages) { \ | |
360 | /* chop 10 shorter than the max, to ensure meaning of "..." */ \ | |
361 | len = RegexLengthToShowInErrorMessages - 10; \ | |
362 | ellipses = "..."; \ | |
363 | } \ | |
364 | Perl_croak(aTHX_ "%s in regex m/%.*s%s/", \ | |
365 | msg, (int)len, RExC_precomp, ellipses); \ | |
366 | } STMT_END | |
8615cb43 | 367 | |
b45f050a | 368 | /* |
b45f050a JF |
369 | * Simple_vFAIL -- like FAIL, but marks the current location in the scan |
370 | */ | |
ccb2c380 | 371 | #define Simple_vFAIL(m) STMT_START { \ |
a28509cc | 372 | const IV offset = RExC_parse - RExC_precomp; \ |
ccb2c380 MP |
373 | Perl_croak(aTHX_ "%s" REPORT_LOCATION, \ |
374 | m, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
375 | } STMT_END | |
b45f050a JF |
376 | |
377 | /* | |
378 | * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL() | |
379 | */ | |
ccb2c380 MP |
380 | #define vFAIL(m) STMT_START { \ |
381 | if (!SIZE_ONLY) \ | |
382 | SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \ | |
383 | Simple_vFAIL(m); \ | |
384 | } STMT_END | |
b45f050a JF |
385 | |
386 | /* | |
387 | * Like Simple_vFAIL(), but accepts two arguments. | |
388 | */ | |
ccb2c380 | 389 | #define Simple_vFAIL2(m,a1) STMT_START { \ |
a28509cc | 390 | const IV offset = RExC_parse - RExC_precomp; \ |
ccb2c380 MP |
391 | S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, \ |
392 | (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
393 | } STMT_END | |
b45f050a JF |
394 | |
395 | /* | |
396 | * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL2(). | |
397 | */ | |
ccb2c380 MP |
398 | #define vFAIL2(m,a1) STMT_START { \ |
399 | if (!SIZE_ONLY) \ | |
400 | SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \ | |
401 | Simple_vFAIL2(m, a1); \ | |
402 | } STMT_END | |
b45f050a JF |
403 | |
404 | ||
405 | /* | |
406 | * Like Simple_vFAIL(), but accepts three arguments. | |
407 | */ | |
ccb2c380 | 408 | #define Simple_vFAIL3(m, a1, a2) STMT_START { \ |
a28509cc | 409 | const IV offset = RExC_parse - RExC_precomp; \ |
ccb2c380 MP |
410 | S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, \ |
411 | (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
412 | } STMT_END | |
b45f050a JF |
413 | |
414 | /* | |
415 | * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL3(). | |
416 | */ | |
ccb2c380 MP |
417 | #define vFAIL3(m,a1,a2) STMT_START { \ |
418 | if (!SIZE_ONLY) \ | |
419 | SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \ | |
420 | Simple_vFAIL3(m, a1, a2); \ | |
421 | } STMT_END | |
b45f050a JF |
422 | |
423 | /* | |
424 | * Like Simple_vFAIL(), but accepts four arguments. | |
425 | */ | |
ccb2c380 | 426 | #define Simple_vFAIL4(m, a1, a2, a3) STMT_START { \ |
a28509cc | 427 | const IV offset = RExC_parse - RExC_precomp; \ |
ccb2c380 MP |
428 | S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, a3, \ |
429 | (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
430 | } STMT_END | |
b45f050a | 431 | |
ccb2c380 | 432 | #define vWARN(loc,m) STMT_START { \ |
a28509cc | 433 | const IV offset = loc - RExC_precomp; \ |
ccb2c380 MP |
434 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s" REPORT_LOCATION, \ |
435 | m, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
436 | } STMT_END | |
437 | ||
438 | #define vWARNdep(loc,m) STMT_START { \ | |
a28509cc | 439 | const IV offset = loc - RExC_precomp; \ |
ccb2c380 MP |
440 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_REGEXP), \ |
441 | "%s" REPORT_LOCATION, \ | |
442 | m, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
443 | } STMT_END | |
444 | ||
445 | ||
446 | #define vWARN2(loc, m, a1) STMT_START { \ | |
a28509cc | 447 | const IV offset = loc - RExC_precomp; \ |
ccb2c380 MP |
448 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
449 | a1, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
450 | } STMT_END | |
451 | ||
452 | #define vWARN3(loc, m, a1, a2) STMT_START { \ | |
a28509cc | 453 | const IV offset = loc - RExC_precomp; \ |
ccb2c380 MP |
454 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
455 | a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
456 | } STMT_END | |
457 | ||
458 | #define vWARN4(loc, m, a1, a2, a3) STMT_START { \ | |
a28509cc | 459 | const IV offset = loc - RExC_precomp; \ |
ccb2c380 MP |
460 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
461 | a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
462 | } STMT_END | |
463 | ||
464 | #define vWARN5(loc, m, a1, a2, a3, a4) STMT_START { \ | |
a28509cc | 465 | const IV offset = loc - RExC_precomp; \ |
ccb2c380 MP |
466 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
467 | a1, a2, a3, a4, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
468 | } STMT_END | |
9d1d55b5 | 469 | |
8615cb43 | 470 | |
cd439c50 | 471 | /* Allow for side effects in s */ |
ccb2c380 MP |
472 | #define REGC(c,s) STMT_START { \ |
473 | if (!SIZE_ONLY) *(s) = (c); else (void)(s); \ | |
474 | } STMT_END | |
cd439c50 | 475 | |
fac92740 MJD |
476 | /* Macros for recording node offsets. 20001227 mjd@plover.com |
477 | * Nodes are numbered 1, 2, 3, 4. Node #n's position is recorded in | |
478 | * element 2*n-1 of the array. Element #2n holds the byte length node #n. | |
479 | * Element 0 holds the number n. | |
07be1b83 | 480 | * Position is 1 indexed. |
fac92740 MJD |
481 | */ |
482 | ||
ccb2c380 MP |
483 | #define Set_Node_Offset_To_R(node,byte) STMT_START { \ |
484 | if (! SIZE_ONLY) { \ | |
485 | MJD_OFFSET_DEBUG(("** (%d) offset of node %d is %d.\n", \ | |
07be1b83 | 486 | __LINE__, (node), (int)(byte))); \ |
ccb2c380 | 487 | if((node) < 0) { \ |
551405c4 | 488 | Perl_croak(aTHX_ "value of node is %d in Offset macro", (int)(node)); \ |
ccb2c380 MP |
489 | } else { \ |
490 | RExC_offsets[2*(node)-1] = (byte); \ | |
491 | } \ | |
492 | } \ | |
493 | } STMT_END | |
494 | ||
495 | #define Set_Node_Offset(node,byte) \ | |
496 | Set_Node_Offset_To_R((node)-RExC_emit_start, (byte)-RExC_start) | |
497 | #define Set_Cur_Node_Offset Set_Node_Offset(RExC_emit, RExC_parse) | |
498 | ||
499 | #define Set_Node_Length_To_R(node,len) STMT_START { \ | |
500 | if (! SIZE_ONLY) { \ | |
501 | MJD_OFFSET_DEBUG(("** (%d) size of node %d is %d.\n", \ | |
551405c4 | 502 | __LINE__, (int)(node), (int)(len))); \ |
ccb2c380 | 503 | if((node) < 0) { \ |
551405c4 | 504 | Perl_croak(aTHX_ "value of node is %d in Length macro", (int)(node)); \ |
ccb2c380 MP |
505 | } else { \ |
506 | RExC_offsets[2*(node)] = (len); \ | |
507 | } \ | |
508 | } \ | |
509 | } STMT_END | |
510 | ||
511 | #define Set_Node_Length(node,len) \ | |
512 | Set_Node_Length_To_R((node)-RExC_emit_start, len) | |
513 | #define Set_Cur_Node_Length(len) Set_Node_Length(RExC_emit, len) | |
514 | #define Set_Node_Cur_Length(node) \ | |
515 | Set_Node_Length(node, RExC_parse - parse_start) | |
fac92740 MJD |
516 | |
517 | /* Get offsets and lengths */ | |
518 | #define Node_Offset(n) (RExC_offsets[2*((n)-RExC_emit_start)-1]) | |
519 | #define Node_Length(n) (RExC_offsets[2*((n)-RExC_emit_start)]) | |
520 | ||
07be1b83 YO |
521 | #define Set_Node_Offset_Length(node,offset,len) STMT_START { \ |
522 | Set_Node_Offset_To_R((node)-RExC_emit_start, (offset)); \ | |
523 | Set_Node_Length_To_R((node)-RExC_emit_start, (len)); \ | |
524 | } STMT_END | |
525 | ||
526 | ||
527 | #if PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS | |
528 | #define EXPERIMENTAL_INPLACESCAN | |
529 | #endif | |
530 | ||
1de06328 | 531 | #define DEBUG_STUDYDATA(data,depth) \ |
a5ca303d | 532 | DEBUG_OPTIMISE_MORE_r(if(data){ \ |
1de06328 YO |
533 | PerlIO_printf(Perl_debug_log, \ |
534 | "%*s"/* Len:%"IVdf"/%"IVdf" */" Pos:%"IVdf"/%"IVdf \ | |
535 | " Flags: %"IVdf" Whilem_c: %"IVdf" Lcp: %"IVdf" ", \ | |
536 | (int)(depth)*2, "", \ | |
537 | (IV)((data)->pos_min), \ | |
538 | (IV)((data)->pos_delta), \ | |
539 | (IV)((data)->flags), \ | |
540 | (IV)((data)->whilem_c), \ | |
541 | (IV)((data)->last_closep ? *((data)->last_closep) : -1) \ | |
542 | ); \ | |
543 | if ((data)->last_found) \ | |
544 | PerlIO_printf(Perl_debug_log, \ | |
545 | "Last:'%s' %"IVdf":%"IVdf"/%"IVdf" %sFixed:'%s' @ %"IVdf \ | |
546 | " %sFloat: '%s' @ %"IVdf"/%"IVdf"", \ | |
547 | SvPVX_const((data)->last_found), \ | |
548 | (IV)((data)->last_end), \ | |
549 | (IV)((data)->last_start_min), \ | |
550 | (IV)((data)->last_start_max), \ | |
551 | ((data)->longest && \ | |
552 | (data)->longest==&((data)->longest_fixed)) ? "*" : "", \ | |
553 | SvPVX_const((data)->longest_fixed), \ | |
554 | (IV)((data)->offset_fixed), \ | |
555 | ((data)->longest && \ | |
556 | (data)->longest==&((data)->longest_float)) ? "*" : "", \ | |
557 | SvPVX_const((data)->longest_float), \ | |
558 | (IV)((data)->offset_float_min), \ | |
559 | (IV)((data)->offset_float_max) \ | |
560 | ); \ | |
561 | PerlIO_printf(Perl_debug_log,"\n"); \ | |
562 | }); | |
563 | ||
acfe0abc | 564 | static void clear_re(pTHX_ void *r); |
4327152a | 565 | |
653099ff | 566 | /* Mark that we cannot extend a found fixed substring at this point. |
786e8c11 | 567 | Update the longest found anchored substring and the longest found |
653099ff GS |
568 | floating substrings if needed. */ |
569 | ||
4327152a | 570 | STATIC void |
1de06328 | 571 | S_scan_commit(pTHX_ const RExC_state_t *pRExC_state, scan_data_t *data, I32 *minlenp) |
c277df42 | 572 | { |
e1ec3a88 AL |
573 | const STRLEN l = CHR_SVLEN(data->last_found); |
574 | const STRLEN old_l = CHR_SVLEN(*data->longest); | |
1de06328 | 575 | GET_RE_DEBUG_FLAGS_DECL; |
b81d288d | 576 | |
c277df42 | 577 | if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) { |
6b43b216 | 578 | SvSetMagicSV(*data->longest, data->last_found); |
c277df42 IZ |
579 | if (*data->longest == data->longest_fixed) { |
580 | data->offset_fixed = l ? data->last_start_min : data->pos_min; | |
581 | if (data->flags & SF_BEFORE_EOL) | |
b81d288d | 582 | data->flags |
c277df42 IZ |
583 | |= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL); |
584 | else | |
585 | data->flags &= ~SF_FIX_BEFORE_EOL; | |
1de06328 YO |
586 | data->minlen_fixed=minlenp; |
587 | data->lookbehind_fixed=0; | |
a0ed51b3 LW |
588 | } |
589 | else { | |
c277df42 | 590 | data->offset_float_min = l ? data->last_start_min : data->pos_min; |
b81d288d AB |
591 | data->offset_float_max = (l |
592 | ? data->last_start_max | |
c277df42 | 593 | : data->pos_min + data->pos_delta); |
9051bda5 HS |
594 | if ((U32)data->offset_float_max > (U32)I32_MAX) |
595 | data->offset_float_max = I32_MAX; | |
c277df42 | 596 | if (data->flags & SF_BEFORE_EOL) |
b81d288d | 597 | data->flags |
c277df42 IZ |
598 | |= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL); |
599 | else | |
600 | data->flags &= ~SF_FL_BEFORE_EOL; | |
1de06328 YO |
601 | data->minlen_float=minlenp; |
602 | data->lookbehind_float=0; | |
c277df42 IZ |
603 | } |
604 | } | |
605 | SvCUR_set(data->last_found, 0); | |
0eda9292 | 606 | { |
a28509cc | 607 | SV * const sv = data->last_found; |
097eb12c AL |
608 | if (SvUTF8(sv) && SvMAGICAL(sv)) { |
609 | MAGIC * const mg = mg_find(sv, PERL_MAGIC_utf8); | |
610 | if (mg) | |
611 | mg->mg_len = 0; | |
612 | } | |
0eda9292 | 613 | } |
c277df42 IZ |
614 | data->last_end = -1; |
615 | data->flags &= ~SF_BEFORE_EOL; | |
1de06328 | 616 | DEBUG_STUDYDATA(data,0); |
c277df42 IZ |
617 | } |
618 | ||
653099ff GS |
619 | /* Can match anything (initialization) */ |
620 | STATIC void | |
097eb12c | 621 | S_cl_anything(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl) |
653099ff | 622 | { |
653099ff | 623 | ANYOF_CLASS_ZERO(cl); |
f8bef550 | 624 | ANYOF_BITMAP_SETALL(cl); |
1aa99e6b | 625 | cl->flags = ANYOF_EOS|ANYOF_UNICODE_ALL; |
653099ff GS |
626 | if (LOC) |
627 | cl->flags |= ANYOF_LOCALE; | |
628 | } | |
629 | ||
630 | /* Can match anything (initialization) */ | |
631 | STATIC int | |
5f66b61c | 632 | S_cl_is_anything(const struct regnode_charclass_class *cl) |
653099ff GS |
633 | { |
634 | int value; | |
635 | ||
aaa51d5e | 636 | for (value = 0; value <= ANYOF_MAX; value += 2) |
653099ff GS |
637 | if (ANYOF_CLASS_TEST(cl, value) && ANYOF_CLASS_TEST(cl, value + 1)) |
638 | return 1; | |
1aa99e6b IH |
639 | if (!(cl->flags & ANYOF_UNICODE_ALL)) |
640 | return 0; | |
10edeb5d | 641 | if (!ANYOF_BITMAP_TESTALLSET((const void*)cl)) |
f8bef550 | 642 | return 0; |
653099ff GS |
643 | return 1; |
644 | } | |
645 | ||
646 | /* Can match anything (initialization) */ | |
647 | STATIC void | |
097eb12c | 648 | S_cl_init(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl) |
653099ff | 649 | { |
8ecf7187 | 650 | Zero(cl, 1, struct regnode_charclass_class); |
653099ff | 651 | cl->type = ANYOF; |
830247a4 | 652 | cl_anything(pRExC_state, cl); |
653099ff GS |
653 | } |
654 | ||
655 | STATIC void | |
097eb12c | 656 | S_cl_init_zero(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl) |
653099ff | 657 | { |
8ecf7187 | 658 | Zero(cl, 1, struct regnode_charclass_class); |
653099ff | 659 | cl->type = ANYOF; |
830247a4 | 660 | cl_anything(pRExC_state, cl); |
653099ff GS |
661 | if (LOC) |
662 | cl->flags |= ANYOF_LOCALE; | |
663 | } | |
664 | ||
665 | /* 'And' a given class with another one. Can create false positives */ | |
666 | /* We assume that cl is not inverted */ | |
667 | STATIC void | |
5f66b61c | 668 | S_cl_and(struct regnode_charclass_class *cl, |
a28509cc | 669 | const struct regnode_charclass_class *and_with) |
653099ff | 670 | { |
653099ff GS |
671 | if (!(and_with->flags & ANYOF_CLASS) |
672 | && !(cl->flags & ANYOF_CLASS) | |
673 | && (and_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE) | |
674 | && !(and_with->flags & ANYOF_FOLD) | |
675 | && !(cl->flags & ANYOF_FOLD)) { | |
676 | int i; | |
677 | ||
678 | if (and_with->flags & ANYOF_INVERT) | |
679 | for (i = 0; i < ANYOF_BITMAP_SIZE; i++) | |
680 | cl->bitmap[i] &= ~and_with->bitmap[i]; | |
681 | else | |
682 | for (i = 0; i < ANYOF_BITMAP_SIZE; i++) | |
683 | cl->bitmap[i] &= and_with->bitmap[i]; | |
684 | } /* XXXX: logic is complicated otherwise, leave it along for a moment. */ | |
685 | if (!(and_with->flags & ANYOF_EOS)) | |
686 | cl->flags &= ~ANYOF_EOS; | |
1aa99e6b | 687 | |
14ebb1a2 JH |
688 | if (cl->flags & ANYOF_UNICODE_ALL && and_with->flags & ANYOF_UNICODE && |
689 | !(and_with->flags & ANYOF_INVERT)) { | |
1aa99e6b IH |
690 | cl->flags &= ~ANYOF_UNICODE_ALL; |
691 | cl->flags |= ANYOF_UNICODE; | |
692 | ARG_SET(cl, ARG(and_with)); | |
693 | } | |
14ebb1a2 JH |
694 | if (!(and_with->flags & ANYOF_UNICODE_ALL) && |
695 | !(and_with->flags & ANYOF_INVERT)) | |
1aa99e6b | 696 | cl->flags &= ~ANYOF_UNICODE_ALL; |
14ebb1a2 JH |
697 | if (!(and_with->flags & (ANYOF_UNICODE|ANYOF_UNICODE_ALL)) && |
698 | !(and_with->flags & ANYOF_INVERT)) | |
1aa99e6b | 699 | cl->flags &= ~ANYOF_UNICODE; |
653099ff GS |
700 | } |
701 | ||
702 | /* 'OR' a given class with another one. Can create false positives */ | |
703 | /* We assume that cl is not inverted */ | |
704 | STATIC void | |
097eb12c | 705 | S_cl_or(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl, const struct regnode_charclass_class *or_with) |
653099ff | 706 | { |
653099ff GS |
707 | if (or_with->flags & ANYOF_INVERT) { |
708 | /* We do not use | |
709 | * (B1 | CL1) | (!B2 & !CL2) = (B1 | !B2 & !CL2) | (CL1 | (!B2 & !CL2)) | |
710 | * <= (B1 | !B2) | (CL1 | !CL2) | |
711 | * which is wasteful if CL2 is small, but we ignore CL2: | |
712 | * (B1 | CL1) | (!B2 & !CL2) <= (B1 | CL1) | !B2 = (B1 | !B2) | CL1 | |
713 | * XXXX Can we handle case-fold? Unclear: | |
714 | * (OK1(i) | OK1(i')) | !(OK1(i) | OK1(i')) = | |
715 | * (OK1(i) | OK1(i')) | (!OK1(i) & !OK1(i')) | |
716 | */ | |
717 | if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE) | |
718 | && !(or_with->flags & ANYOF_FOLD) | |
719 | && !(cl->flags & ANYOF_FOLD) ) { | |
720 | int i; | |
721 | ||
722 | for (i = 0; i < ANYOF_BITMAP_SIZE; i++) | |
723 | cl->bitmap[i] |= ~or_with->bitmap[i]; | |
724 | } /* XXXX: logic is complicated otherwise */ | |
725 | else { | |
830247a4 | 726 | cl_anything(pRExC_state, cl); |
653099ff GS |
727 | } |
728 | } else { | |
729 | /* (B1 | CL1) | (B2 | CL2) = (B1 | B2) | (CL1 | CL2)) */ | |
730 | if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE) | |
b81d288d | 731 | && (!(or_with->flags & ANYOF_FOLD) |
653099ff GS |
732 | || (cl->flags & ANYOF_FOLD)) ) { |
733 | int i; | |
734 | ||
735 | /* OR char bitmap and class bitmap separately */ | |
736 | for (i = 0; i < ANYOF_BITMAP_SIZE; i++) | |
737 | cl->bitmap[i] |= or_with->bitmap[i]; | |
738 | if (or_with->flags & ANYOF_CLASS) { | |
739 | for (i = 0; i < ANYOF_CLASSBITMAP_SIZE; i++) | |
740 | cl->classflags[i] |= or_with->classflags[i]; | |
741 | cl->flags |= ANYOF_CLASS; | |
742 | } | |
743 | } | |
744 | else { /* XXXX: logic is complicated, leave it along for a moment. */ | |
830247a4 | 745 | cl_anything(pRExC_state, cl); |
653099ff GS |
746 | } |
747 | } | |
748 | if (or_with->flags & ANYOF_EOS) | |
749 | cl->flags |= ANYOF_EOS; | |
1aa99e6b IH |
750 | |
751 | if (cl->flags & ANYOF_UNICODE && or_with->flags & ANYOF_UNICODE && | |
752 | ARG(cl) != ARG(or_with)) { | |
753 | cl->flags |= ANYOF_UNICODE_ALL; | |
754 | cl->flags &= ~ANYOF_UNICODE; | |
755 | } | |
756 | if (or_with->flags & ANYOF_UNICODE_ALL) { | |
757 | cl->flags |= ANYOF_UNICODE_ALL; | |
758 | cl->flags &= ~ANYOF_UNICODE; | |
759 | } | |
653099ff GS |
760 | } |
761 | ||
a3621e74 YO |
762 | #define TRIE_LIST_ITEM(state,idx) (trie->states[state].trans.list)[ idx ] |
763 | #define TRIE_LIST_CUR(state) ( TRIE_LIST_ITEM( state, 0 ).forid ) | |
764 | #define TRIE_LIST_LEN(state) ( TRIE_LIST_ITEM( state, 0 ).newstate ) | |
765 | #define TRIE_LIST_USED(idx) ( trie->states[state].trans.list ? (TRIE_LIST_CUR( idx ) - 1) : 0 ) | |
766 | ||
3dab1dad YO |
767 | |
768 | #ifdef DEBUGGING | |
07be1b83 | 769 | /* |
3dab1dad YO |
770 | dump_trie(trie) |
771 | dump_trie_interim_list(trie,next_alloc) | |
772 | dump_trie_interim_table(trie,next_alloc) | |
773 | ||
774 | These routines dump out a trie in a somewhat readable format. | |
07be1b83 YO |
775 | The _interim_ variants are used for debugging the interim |
776 | tables that are used to generate the final compressed | |
777 | representation which is what dump_trie expects. | |
778 | ||
3dab1dad YO |
779 | Part of the reason for their existance is to provide a form |
780 | of documentation as to how the different representations function. | |
07be1b83 YO |
781 | |
782 | */ | |
3dab1dad YO |
783 | |
784 | /* | |
785 | dump_trie(trie) | |
786 | Dumps the final compressed table form of the trie to Perl_debug_log. | |
787 | Used for debugging make_trie(). | |
788 | */ | |
789 | ||
790 | STATIC void | |
791 | S_dump_trie(pTHX_ const struct _reg_trie_data *trie,U32 depth) | |
792 | { | |
793 | U32 state; | |
ab3bbdeb YO |
794 | SV *sv=sv_newmortal(); |
795 | int colwidth= trie->widecharmap ? 6 : 4; | |
3dab1dad YO |
796 | GET_RE_DEBUG_FLAGS_DECL; |
797 | ||
ab3bbdeb | 798 | |
3dab1dad YO |
799 | PerlIO_printf( Perl_debug_log, "%*sChar : %-6s%-6s%-4s ", |
800 | (int)depth * 2 + 2,"", | |
801 | "Match","Base","Ofs" ); | |
802 | ||
803 | for( state = 0 ; state < trie->uniquecharcount ; state++ ) { | |
be8e71aa | 804 | SV ** const tmp = av_fetch( trie->revcharmap, state, 0); |
3dab1dad | 805 | if ( tmp ) { |
ab3bbdeb YO |
806 | PerlIO_printf( Perl_debug_log, "%*s", |
807 | colwidth, | |
ddc5bc0f | 808 | pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth, |
ab3bbdeb YO |
809 | PL_colors[0], PL_colors[1], |
810 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) | | |
811 | PERL_PV_ESCAPE_FIRSTCHAR | |
812 | ) | |
813 | ); | |
3dab1dad YO |
814 | } |
815 | } | |
816 | PerlIO_printf( Perl_debug_log, "\n%*sState|-----------------------", | |
817 | (int)depth * 2 + 2,""); | |
818 | ||
819 | for( state = 0 ; state < trie->uniquecharcount ; state++ ) | |
ab3bbdeb | 820 | PerlIO_printf( Perl_debug_log, "%.*s", colwidth, "--------"); |
3dab1dad YO |
821 | PerlIO_printf( Perl_debug_log, "\n"); |
822 | ||
786e8c11 | 823 | for( state = 1 ; state < trie->laststate ; state++ ) { |
be8e71aa | 824 | const U32 base = trie->states[ state ].trans.base; |
3dab1dad YO |
825 | |
826 | PerlIO_printf( Perl_debug_log, "%*s#%4"UVXf"|", (int)depth * 2 + 2,"", (UV)state); | |
827 | ||
828 | if ( trie->states[ state ].wordnum ) { | |
829 | PerlIO_printf( Perl_debug_log, " W%4X", trie->states[ state ].wordnum ); | |
830 | } else { | |
831 | PerlIO_printf( Perl_debug_log, "%6s", "" ); | |
832 | } | |
833 | ||
834 | PerlIO_printf( Perl_debug_log, " @%4"UVXf" ", (UV)base ); | |
835 | ||
836 | if ( base ) { | |
837 | U32 ofs = 0; | |
838 | ||
839 | while( ( base + ofs < trie->uniquecharcount ) || | |
840 | ( base + ofs - trie->uniquecharcount < trie->lasttrans | |
841 | && trie->trans[ base + ofs - trie->uniquecharcount ].check != state)) | |
842 | ofs++; | |
843 | ||
844 | PerlIO_printf( Perl_debug_log, "+%2"UVXf"[ ", (UV)ofs); | |
845 | ||
846 | for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) { | |
847 | if ( ( base + ofs >= trie->uniquecharcount ) && | |
848 | ( base + ofs - trie->uniquecharcount < trie->lasttrans ) && | |
849 | trie->trans[ base + ofs - trie->uniquecharcount ].check == state ) | |
850 | { | |
ab3bbdeb YO |
851 | PerlIO_printf( Perl_debug_log, "%*"UVXf, |
852 | colwidth, | |
3dab1dad YO |
853 | (UV)trie->trans[ base + ofs - trie->uniquecharcount ].next ); |
854 | } else { | |
ab3bbdeb | 855 | PerlIO_printf( Perl_debug_log, "%*s",colwidth," ." ); |
3dab1dad YO |
856 | } |
857 | } | |
858 | ||
859 | PerlIO_printf( Perl_debug_log, "]"); | |
860 | ||
861 | } | |
862 | PerlIO_printf( Perl_debug_log, "\n" ); | |
863 | } | |
864 | } | |
865 | /* | |
866 | dump_trie_interim_list(trie,next_alloc) | |
867 | Dumps a fully constructed but uncompressed trie in list form. | |
868 | List tries normally only are used for construction when the number of | |
869 | possible chars (trie->uniquecharcount) is very high. | |
870 | Used for debugging make_trie(). | |
871 | */ | |
872 | STATIC void | |
873 | S_dump_trie_interim_list(pTHX_ const struct _reg_trie_data *trie, U32 next_alloc,U32 depth) | |
874 | { | |
875 | U32 state; | |
ab3bbdeb YO |
876 | SV *sv=sv_newmortal(); |
877 | int colwidth= trie->widecharmap ? 6 : 4; | |
3dab1dad YO |
878 | GET_RE_DEBUG_FLAGS_DECL; |
879 | /* print out the table precompression. */ | |
ab3bbdeb YO |
880 | PerlIO_printf( Perl_debug_log, "%*sState :Word | Transition Data\n%*s%s", |
881 | (int)depth * 2 + 2,"", (int)depth * 2 + 2,"", | |
882 | "------:-----+-----------------\n" ); | |
3dab1dad YO |
883 | |
884 | for( state=1 ; state < next_alloc ; state ++ ) { | |
885 | U16 charid; | |
886 | ||
ab3bbdeb | 887 | PerlIO_printf( Perl_debug_log, "%*s %4"UVXf" :", |
3dab1dad YO |
888 | (int)depth * 2 + 2,"", (UV)state ); |
889 | if ( ! trie->states[ state ].wordnum ) { | |
890 | PerlIO_printf( Perl_debug_log, "%5s| ",""); | |
891 | } else { | |
892 | PerlIO_printf( Perl_debug_log, "W%4x| ", | |
893 | trie->states[ state ].wordnum | |
894 | ); | |
895 | } | |
896 | for( charid = 1 ; charid <= TRIE_LIST_USED( state ) ; charid++ ) { | |
be8e71aa | 897 | SV ** const tmp = av_fetch( trie->revcharmap, TRIE_LIST_ITEM(state,charid).forid, 0); |
ab3bbdeb YO |
898 | if ( tmp ) { |
899 | PerlIO_printf( Perl_debug_log, "%*s:%3X=%4"UVXf" | ", | |
900 | colwidth, | |
ddc5bc0f | 901 | pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth, |
ab3bbdeb YO |
902 | PL_colors[0], PL_colors[1], |
903 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) | | |
904 | PERL_PV_ESCAPE_FIRSTCHAR | |
905 | ) , | |
3dab1dad YO |
906 | TRIE_LIST_ITEM(state,charid).forid, |
907 | (UV)TRIE_LIST_ITEM(state,charid).newstate | |
908 | ); | |
909 | } | |
ab3bbdeb YO |
910 | } |
911 | PerlIO_printf( Perl_debug_log, "\n"); | |
3dab1dad YO |
912 | } |
913 | } | |
914 | ||
915 | /* | |
916 | dump_trie_interim_table(trie,next_alloc) | |
917 | Dumps a fully constructed but uncompressed trie in table form. | |
918 | This is the normal DFA style state transition table, with a few | |
919 | twists to facilitate compression later. | |
920 | Used for debugging make_trie(). | |
921 | */ | |
922 | STATIC void | |
923 | S_dump_trie_interim_table(pTHX_ const struct _reg_trie_data *trie, U32 next_alloc, U32 depth) | |
924 | { | |
925 | U32 state; | |
926 | U16 charid; | |
ab3bbdeb YO |
927 | SV *sv=sv_newmortal(); |
928 | int colwidth= trie->widecharmap ? 6 : 4; | |
3dab1dad YO |
929 | GET_RE_DEBUG_FLAGS_DECL; |
930 | ||
931 | /* | |
932 | print out the table precompression so that we can do a visual check | |
933 | that they are identical. | |
934 | */ | |
935 | ||
936 | PerlIO_printf( Perl_debug_log, "%*sChar : ",(int)depth * 2 + 2,"" ); | |
937 | ||
938 | for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) { | |
be8e71aa | 939 | SV ** const tmp = av_fetch( trie->revcharmap, charid, 0); |
3dab1dad | 940 | if ( tmp ) { |
ab3bbdeb YO |
941 | PerlIO_printf( Perl_debug_log, "%*s", |
942 | colwidth, | |
ddc5bc0f | 943 | pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth, |
ab3bbdeb YO |
944 | PL_colors[0], PL_colors[1], |
945 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) | | |
946 | PERL_PV_ESCAPE_FIRSTCHAR | |
947 | ) | |
948 | ); | |
3dab1dad YO |
949 | } |
950 | } | |
951 | ||
952 | PerlIO_printf( Perl_debug_log, "\n%*sState+-",(int)depth * 2 + 2,"" ); | |
953 | ||
954 | for( charid=0 ; charid < trie->uniquecharcount ; charid++ ) { | |
ab3bbdeb | 955 | PerlIO_printf( Perl_debug_log, "%.*s", colwidth,"--------"); |
3dab1dad YO |
956 | } |
957 | ||
958 | PerlIO_printf( Perl_debug_log, "\n" ); | |
959 | ||
960 | for( state=1 ; state < next_alloc ; state += trie->uniquecharcount ) { | |
961 | ||
962 | PerlIO_printf( Perl_debug_log, "%*s%4"UVXf" : ", | |
963 | (int)depth * 2 + 2,"", | |
964 | (UV)TRIE_NODENUM( state ) ); | |
965 | ||
966 | for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) { | |
ab3bbdeb YO |
967 | UV v=(UV)SAFE_TRIE_NODENUM( trie->trans[ state + charid ].next ); |
968 | if (v) | |
969 | PerlIO_printf( Perl_debug_log, "%*"UVXf, colwidth, v ); | |
970 | else | |
971 | PerlIO_printf( Perl_debug_log, "%*s", colwidth, "." ); | |
3dab1dad YO |
972 | } |
973 | if ( ! trie->states[ TRIE_NODENUM( state ) ].wordnum ) { | |
974 | PerlIO_printf( Perl_debug_log, " (%4"UVXf")\n", (UV)trie->trans[ state ].check ); | |
975 | } else { | |
976 | PerlIO_printf( Perl_debug_log, " (%4"UVXf") W%4X\n", (UV)trie->trans[ state ].check, | |
977 | trie->states[ TRIE_NODENUM( state ) ].wordnum ); | |
978 | } | |
979 | } | |
07be1b83 | 980 | } |
3dab1dad YO |
981 | |
982 | #endif | |
983 | ||
786e8c11 YO |
984 | /* make_trie(startbranch,first,last,tail,word_count,flags,depth) |
985 | startbranch: the first branch in the whole branch sequence | |
986 | first : start branch of sequence of branch-exact nodes. | |
987 | May be the same as startbranch | |
988 | last : Thing following the last branch. | |
989 | May be the same as tail. | |
990 | tail : item following the branch sequence | |
991 | count : words in the sequence | |
992 | flags : currently the OP() type we will be building one of /EXACT(|F|Fl)/ | |
993 | depth : indent depth | |
3dab1dad | 994 | |
786e8c11 | 995 | Inplace optimizes a sequence of 2 or more Branch-Exact nodes into a TRIE node. |
07be1b83 | 996 | |
786e8c11 YO |
997 | A trie is an N'ary tree where the branches are determined by digital |
998 | decomposition of the key. IE, at the root node you look up the 1st character and | |
999 | follow that branch repeat until you find the end of the branches. Nodes can be | |
1000 | marked as "accepting" meaning they represent a complete word. Eg: | |
07be1b83 | 1001 | |
786e8c11 | 1002 | /he|she|his|hers/ |
72f13be8 | 1003 | |
786e8c11 YO |
1004 | would convert into the following structure. Numbers represent states, letters |
1005 | following numbers represent valid transitions on the letter from that state, if | |
1006 | the number is in square brackets it represents an accepting state, otherwise it | |
1007 | will be in parenthesis. | |
07be1b83 | 1008 | |
786e8c11 YO |
1009 | +-h->+-e->[3]-+-r->(8)-+-s->[9] |
1010 | | | | |
1011 | | (2) | |
1012 | | | | |
1013 | (1) +-i->(6)-+-s->[7] | |
1014 | | | |
1015 | +-s->(3)-+-h->(4)-+-e->[5] | |
07be1b83 | 1016 | |
786e8c11 YO |
1017 | Accept Word Mapping: 3=>1 (he),5=>2 (she), 7=>3 (his), 9=>4 (hers) |
1018 | ||
1019 | This shows that when matching against the string 'hers' we will begin at state 1 | |
1020 | read 'h' and move to state 2, read 'e' and move to state 3 which is accepting, | |
1021 | then read 'r' and go to state 8 followed by 's' which takes us to state 9 which | |
1022 | is also accepting. Thus we know that we can match both 'he' and 'hers' with a | |
1023 | single traverse. We store a mapping from accepting to state to which word was | |
1024 | matched, and then when we have multiple possibilities we try to complete the | |
1025 | rest of the regex in the order in which they occured in the alternation. | |
1026 | ||
1027 | The only prior NFA like behaviour that would be changed by the TRIE support is | |
1028 | the silent ignoring of duplicate alternations which are of the form: | |
1029 | ||
1030 | / (DUPE|DUPE) X? (?{ ... }) Y /x | |
1031 | ||
1032 | Thus EVAL blocks follwing a trie may be called a different number of times with | |
1033 | and without the optimisation. With the optimisations dupes will be silently | |
1034 | ignored. This inconsistant behaviour of EVAL type nodes is well established as | |
1035 | the following demonstrates: | |
1036 | ||
1037 | 'words'=~/(word|word|word)(?{ print $1 })[xyz]/ | |
1038 | ||
1039 | which prints out 'word' three times, but | |
1040 | ||
1041 | 'words'=~/(word|word|word)(?{ print $1 })S/ | |
1042 | ||
1043 | which doesnt print it out at all. This is due to other optimisations kicking in. | |
1044 | ||
1045 | Example of what happens on a structural level: | |
1046 | ||
1047 | The regexp /(ac|ad|ab)+/ will produce the folowing debug output: | |
1048 | ||
1049 | 1: CURLYM[1] {1,32767}(18) | |
1050 | 5: BRANCH(8) | |
1051 | 6: EXACT <ac>(16) | |
1052 | 8: BRANCH(11) | |
1053 | 9: EXACT <ad>(16) | |
1054 | 11: BRANCH(14) | |
1055 | 12: EXACT <ab>(16) | |
1056 | 16: SUCCEED(0) | |
1057 | 17: NOTHING(18) | |
1058 | 18: END(0) | |
1059 | ||
1060 | This would be optimizable with startbranch=5, first=5, last=16, tail=16 | |
1061 | and should turn into: | |
1062 | ||
1063 | 1: CURLYM[1] {1,32767}(18) | |
1064 | 5: TRIE(16) | |
1065 | [Words:3 Chars Stored:6 Unique Chars:4 States:5 NCP:1] | |
1066 | <ac> | |
1067 | <ad> | |
1068 | <ab> | |
1069 | 16: SUCCEED(0) | |
1070 | 17: NOTHING(18) | |
1071 | 18: END(0) | |
1072 | ||
1073 | Cases where tail != last would be like /(?foo|bar)baz/: | |
1074 | ||
1075 | 1: BRANCH(4) | |
1076 | 2: EXACT <foo>(8) | |
1077 | 4: BRANCH(7) | |
1078 | 5: EXACT <bar>(8) | |
1079 | 7: TAIL(8) | |
1080 | 8: EXACT <baz>(10) | |
1081 | 10: END(0) | |
1082 | ||
1083 | which would be optimizable with startbranch=1, first=1, last=7, tail=8 | |
1084 | and would end up looking like: | |
1085 | ||
1086 | 1: TRIE(8) | |
1087 | [Words:2 Chars Stored:6 Unique Chars:5 States:7 NCP:1] | |
1088 | <foo> | |
1089 | <bar> | |
1090 | 7: TAIL(8) | |
1091 | 8: EXACT <baz>(10) | |
1092 | 10: END(0) | |
1093 | ||
1094 | d = uvuni_to_utf8_flags(d, uv, 0); | |
1095 | ||
1096 | is the recommended Unicode-aware way of saying | |
1097 | ||
1098 | *(d++) = uv; | |
1099 | */ | |
1100 | ||
1101 | #define TRIE_STORE_REVCHAR \ | |
1102 | STMT_START { \ | |
1103 | SV *tmp = Perl_newSVpvf_nocontext( "%c", (int)uvc ); \ | |
1104 | if (UTF) SvUTF8_on(tmp); \ | |
1105 | av_push( TRIE_REVCHARMAP(trie), tmp ); \ | |
1106 | } STMT_END | |
1107 | ||
1108 | #define TRIE_READ_CHAR STMT_START { \ | |
1109 | wordlen++; \ | |
1110 | if ( UTF ) { \ | |
1111 | if ( folder ) { \ | |
1112 | if ( foldlen > 0 ) { \ | |
1113 | uvc = utf8n_to_uvuni( scan, UTF8_MAXLEN, &len, uniflags ); \ | |
1114 | foldlen -= len; \ | |
1115 | scan += len; \ | |
1116 | len = 0; \ | |
1117 | } else { \ | |
1118 | uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\ | |
1119 | uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \ | |
1120 | foldlen -= UNISKIP( uvc ); \ | |
1121 | scan = foldbuf + UNISKIP( uvc ); \ | |
1122 | } \ | |
1123 | } else { \ | |
1124 | uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\ | |
1125 | } \ | |
1126 | } else { \ | |
1127 | uvc = (U32)*uc; \ | |
1128 | len = 1; \ | |
1129 | } \ | |
1130 | } STMT_END | |
1131 | ||
1132 | ||
1133 | ||
1134 | #define TRIE_LIST_PUSH(state,fid,ns) STMT_START { \ | |
1135 | if ( TRIE_LIST_CUR( state ) >=TRIE_LIST_LEN( state ) ) { \ | |
1136 | TRIE_LIST_LEN( state ) *= 2; \ | |
1137 | Renew( trie->states[ state ].trans.list, \ | |
1138 | TRIE_LIST_LEN( state ), reg_trie_trans_le ); \ | |
1139 | } \ | |
1140 | TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).forid = fid; \ | |
1141 | TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).newstate = ns; \ | |
1142 | TRIE_LIST_CUR( state )++; \ | |
1143 | } STMT_END | |
07be1b83 | 1144 | |
786e8c11 YO |
1145 | #define TRIE_LIST_NEW(state) STMT_START { \ |
1146 | Newxz( trie->states[ state ].trans.list, \ | |
1147 | 4, reg_trie_trans_le ); \ | |
1148 | TRIE_LIST_CUR( state ) = 1; \ | |
1149 | TRIE_LIST_LEN( state ) = 4; \ | |
1150 | } STMT_END | |
07be1b83 | 1151 | |
786e8c11 YO |
1152 | #define TRIE_HANDLE_WORD(state) STMT_START { \ |
1153 | U16 dupe= trie->states[ state ].wordnum; \ | |
1154 | regnode * const noper_next = regnext( noper ); \ | |
1155 | \ | |
1156 | if (trie->wordlen) \ | |
1157 | trie->wordlen[ curword ] = wordlen; \ | |
1158 | DEBUG_r({ \ | |
1159 | /* store the word for dumping */ \ | |
1160 | SV* tmp; \ | |
1161 | if (OP(noper) != NOTHING) \ | |
1162 | tmp = newSVpvn(STRING(noper), STR_LEN(noper)); \ | |
1163 | else \ | |
1164 | tmp = newSVpvn( "", 0 ); \ | |
1165 | if ( UTF ) SvUTF8_on( tmp ); \ | |
1166 | av_push( trie->words, tmp ); \ | |
1167 | }); \ | |
1168 | \ | |
1169 | curword++; \ | |
1170 | \ | |
1171 | if ( noper_next < tail ) { \ | |
1172 | if (!trie->jump) \ | |
1173 | Newxz( trie->jump, word_count + 1, U16); \ | |
1174 | trie->jump[curword] = (U16)(tail - noper_next); \ | |
1175 | if (!jumper) \ | |
1176 | jumper = noper_next; \ | |
1177 | if (!nextbranch) \ | |
1178 | nextbranch= regnext(cur); \ | |
1179 | } \ | |
1180 | \ | |
1181 | if ( dupe ) { \ | |
1182 | /* So it's a dupe. This means we need to maintain a */\ | |
1183 | /* linked-list from the first to the next. */\ | |
1184 | /* we only allocate the nextword buffer when there */\ | |
1185 | /* a dupe, so first time we have to do the allocation */\ | |
1186 | if (!trie->nextword) \ | |
1187 | Newxz( trie->nextword, word_count + 1, U16); \ | |
1188 | while ( trie->nextword[dupe] ) \ | |
1189 | dupe= trie->nextword[dupe]; \ | |
1190 | trie->nextword[dupe]= curword; \ | |
1191 | } else { \ | |
1192 | /* we haven't inserted this word yet. */ \ | |
1193 | trie->states[ state ].wordnum = curword; \ | |
1194 | } \ | |
1195 | } STMT_END | |
07be1b83 | 1196 | |
3dab1dad | 1197 | |
786e8c11 YO |
1198 | #define TRIE_TRANS_STATE(state,base,ucharcount,charid,special) \ |
1199 | ( ( base + charid >= ucharcount \ | |
1200 | && base + charid < ubound \ | |
1201 | && state == trie->trans[ base - ucharcount + charid ].check \ | |
1202 | && trie->trans[ base - ucharcount + charid ].next ) \ | |
1203 | ? trie->trans[ base - ucharcount + charid ].next \ | |
1204 | : ( state==1 ? special : 0 ) \ | |
1205 | ) | |
3dab1dad | 1206 | |
786e8c11 YO |
1207 | #define MADE_TRIE 1 |
1208 | #define MADE_JUMP_TRIE 2 | |
1209 | #define MADE_EXACT_TRIE 4 | |
3dab1dad | 1210 | |
a3621e74 | 1211 | STATIC I32 |
786e8c11 | 1212 | 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 | 1213 | { |
27da23d5 | 1214 | dVAR; |
a3621e74 YO |
1215 | /* first pass, loop through and scan words */ |
1216 | reg_trie_data *trie; | |
1217 | regnode *cur; | |
9f7f3913 | 1218 | const U32 uniflags = UTF8_ALLOW_DEFAULT; |
a3621e74 YO |
1219 | STRLEN len = 0; |
1220 | UV uvc = 0; | |
1221 | U16 curword = 0; | |
1222 | U32 next_alloc = 0; | |
786e8c11 YO |
1223 | regnode *jumper = NULL; |
1224 | regnode *nextbranch = NULL; | |
a3621e74 | 1225 | /* we just use folder as a flag in utf8 */ |
e1ec3a88 | 1226 | const U8 * const folder = ( flags == EXACTF |
a3621e74 YO |
1227 | ? PL_fold |
1228 | : ( flags == EXACTFL | |
1229 | ? PL_fold_locale | |
1230 | : NULL | |
1231 | ) | |
1232 | ); | |
1233 | ||
e1ec3a88 | 1234 | const U32 data_slot = add_data( pRExC_state, 1, "t" ); |
a3621e74 | 1235 | SV *re_trie_maxbuff; |
3dab1dad YO |
1236 | #ifndef DEBUGGING |
1237 | /* these are only used during construction but are useful during | |
8e11feef | 1238 | * debugging so we store them in the struct when debugging. |
8e11feef | 1239 | */ |
3dab1dad | 1240 | STRLEN trie_charcount=0; |
3dab1dad YO |
1241 | AV *trie_revcharmap; |
1242 | #endif | |
a3621e74 | 1243 | GET_RE_DEBUG_FLAGS_DECL; |
72f13be8 YO |
1244 | #ifndef DEBUGGING |
1245 | PERL_UNUSED_ARG(depth); | |
1246 | #endif | |
a3621e74 | 1247 | |
a02a5408 | 1248 | Newxz( trie, 1, reg_trie_data ); |
a3621e74 | 1249 | trie->refcount = 1; |
3dab1dad | 1250 | trie->startstate = 1; |
786e8c11 | 1251 | trie->wordcount = word_count; |
a3621e74 | 1252 | RExC_rx->data->data[ data_slot ] = (void*)trie; |
a02a5408 | 1253 | Newxz( trie->charmap, 256, U16 ); |
3dab1dad YO |
1254 | if (!(UTF && folder)) |
1255 | Newxz( trie->bitmap, ANYOF_BITMAP_SIZE, char ); | |
a3621e74 YO |
1256 | DEBUG_r({ |
1257 | trie->words = newAV(); | |
a3621e74 | 1258 | }); |
3dab1dad | 1259 | TRIE_REVCHARMAP(trie) = newAV(); |
a3621e74 | 1260 | |
0111c4fd | 1261 | re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1); |
a3621e74 | 1262 | if (!SvIOK(re_trie_maxbuff)) { |
0111c4fd | 1263 | sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT); |
a3621e74 | 1264 | } |
3dab1dad YO |
1265 | DEBUG_OPTIMISE_r({ |
1266 | PerlIO_printf( Perl_debug_log, | |
786e8c11 | 1267 | "%*smake_trie start==%d, first==%d, last==%d, tail==%d depth=%d\n", |
3dab1dad YO |
1268 | (int)depth * 2 + 2, "", |
1269 | REG_NODE_NUM(startbranch),REG_NODE_NUM(first), | |
786e8c11 | 1270 | REG_NODE_NUM(last), REG_NODE_NUM(tail), |
85c3142d | 1271 | (int)depth); |
3dab1dad | 1272 | }); |
a3621e74 YO |
1273 | /* -- First loop and Setup -- |
1274 | ||
1275 | We first traverse the branches and scan each word to determine if it | |
1276 | contains widechars, and how many unique chars there are, this is | |
1277 | important as we have to build a table with at least as many columns as we | |
1278 | have unique chars. | |
1279 | ||
1280 | We use an array of integers to represent the character codes 0..255 | |
1281 | (trie->charmap) and we use a an HV* to store unicode characters. We use the | |
1282 | native representation of the character value as the key and IV's for the | |
1283 | coded index. | |
1284 | ||
1285 | *TODO* If we keep track of how many times each character is used we can | |
1286 | remap the columns so that the table compression later on is more | |
1287 | efficient in terms of memory by ensuring most common value is in the | |
1288 | middle and the least common are on the outside. IMO this would be better | |
1289 | than a most to least common mapping as theres a decent chance the most | |
1290 | common letter will share a node with the least common, meaning the node | |
1291 | will not be compressable. With a middle is most common approach the worst | |
1292 | case is when we have the least common nodes twice. | |
1293 | ||
1294 | */ | |
1295 | ||
a3621e74 | 1296 | for ( cur = first ; cur < last ; cur = regnext( cur ) ) { |
c445ea15 | 1297 | regnode * const noper = NEXTOPER( cur ); |
e1ec3a88 | 1298 | const U8 *uc = (U8*)STRING( noper ); |
a28509cc | 1299 | const U8 * const e = uc + STR_LEN( noper ); |
a3621e74 YO |
1300 | STRLEN foldlen = 0; |
1301 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; | |
2af232bd | 1302 | const U8 *scan = (U8*)NULL; |
07be1b83 | 1303 | U32 wordlen = 0; /* required init */ |
3dab1dad | 1304 | STRLEN chars=0; |
a3621e74 | 1305 | |
3dab1dad YO |
1306 | if (OP(noper) == NOTHING) { |
1307 | trie->minlen= 0; | |
1308 | continue; | |
1309 | } | |
1310 | if (trie->bitmap) { | |
1311 | TRIE_BITMAP_SET(trie,*uc); | |
1312 | if ( folder ) TRIE_BITMAP_SET(trie,folder[ *uc ]); | |
1313 | } | |
a3621e74 | 1314 | for ( ; uc < e ; uc += len ) { |
3dab1dad | 1315 | TRIE_CHARCOUNT(trie)++; |
a3621e74 | 1316 | TRIE_READ_CHAR; |
3dab1dad | 1317 | chars++; |
a3621e74 YO |
1318 | if ( uvc < 256 ) { |
1319 | if ( !trie->charmap[ uvc ] ) { | |
1320 | trie->charmap[ uvc ]=( ++trie->uniquecharcount ); | |
1321 | if ( folder ) | |
1322 | trie->charmap[ folder[ uvc ] ] = trie->charmap[ uvc ]; | |
3dab1dad | 1323 | TRIE_STORE_REVCHAR; |
a3621e74 YO |
1324 | } |
1325 | } else { | |
1326 | SV** svpp; | |
1327 | if ( !trie->widecharmap ) | |
1328 | trie->widecharmap = newHV(); | |
1329 | ||
1330 | svpp = hv_fetch( trie->widecharmap, (char*)&uvc, sizeof( UV ), 1 ); | |
1331 | ||
1332 | if ( !svpp ) | |
e4584336 | 1333 | Perl_croak( aTHX_ "error creating/fetching widecharmap entry for 0x%"UVXf, uvc ); |
a3621e74 YO |
1334 | |
1335 | if ( !SvTRUE( *svpp ) ) { | |
1336 | sv_setiv( *svpp, ++trie->uniquecharcount ); | |
3dab1dad | 1337 | TRIE_STORE_REVCHAR; |
a3621e74 YO |
1338 | } |
1339 | } | |
1340 | } | |
3dab1dad YO |
1341 | if( cur == first ) { |
1342 | trie->minlen=chars; | |
1343 | trie->maxlen=chars; | |
1344 | } else if (chars < trie->minlen) { | |
1345 | trie->minlen=chars; | |
1346 | } else if (chars > trie->maxlen) { | |
1347 | trie->maxlen=chars; | |
1348 | } | |
1349 | ||
a3621e74 YO |
1350 | } /* end first pass */ |
1351 | DEBUG_TRIE_COMPILE_r( | |
3dab1dad YO |
1352 | PerlIO_printf( Perl_debug_log, "%*sTRIE(%s): W:%d C:%d Uq:%d Min:%d Max:%d\n", |
1353 | (int)depth * 2 + 2,"", | |
85c3142d | 1354 | ( trie->widecharmap ? "UTF8" : "NATIVE" ), (int)word_count, |
be8e71aa YO |
1355 | (int)TRIE_CHARCOUNT(trie), trie->uniquecharcount, |
1356 | (int)trie->minlen, (int)trie->maxlen ) | |
a3621e74 | 1357 | ); |
786e8c11 | 1358 | Newxz( trie->wordlen, word_count, U32 ); |
a3621e74 YO |
1359 | |
1360 | /* | |
1361 | We now know what we are dealing with in terms of unique chars and | |
1362 | string sizes so we can calculate how much memory a naive | |
0111c4fd RGS |
1363 | representation using a flat table will take. If it's over a reasonable |
1364 | limit (as specified by ${^RE_TRIE_MAXBUF}) we use a more memory | |
a3621e74 YO |
1365 | conservative but potentially much slower representation using an array |
1366 | of lists. | |
1367 | ||
1368 | At the end we convert both representations into the same compressed | |
1369 | form that will be used in regexec.c for matching with. The latter | |
1370 | is a form that cannot be used to construct with but has memory | |
1371 | properties similar to the list form and access properties similar | |
1372 | to the table form making it both suitable for fast searches and | |
1373 | small enough that its feasable to store for the duration of a program. | |
1374 | ||
1375 | See the comment in the code where the compressed table is produced | |
1376 | inplace from the flat tabe representation for an explanation of how | |
1377 | the compression works. | |
1378 | ||
1379 | */ | |
1380 | ||
1381 | ||
3dab1dad | 1382 | if ( (IV)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1) > SvIV(re_trie_maxbuff) ) { |
a3621e74 YO |
1383 | /* |
1384 | Second Pass -- Array Of Lists Representation | |
1385 | ||
1386 | Each state will be represented by a list of charid:state records | |
1387 | (reg_trie_trans_le) the first such element holds the CUR and LEN | |
1388 | points of the allocated array. (See defines above). | |
1389 | ||
1390 | We build the initial structure using the lists, and then convert | |
1391 | it into the compressed table form which allows faster lookups | |
1392 | (but cant be modified once converted). | |
a3621e74 YO |
1393 | */ |
1394 | ||
a3621e74 YO |
1395 | STRLEN transcount = 1; |
1396 | ||
3dab1dad | 1397 | Newxz( trie->states, TRIE_CHARCOUNT(trie) + 2, reg_trie_state ); |
a3621e74 YO |
1398 | TRIE_LIST_NEW(1); |
1399 | next_alloc = 2; | |
1400 | ||
1401 | for ( cur = first ; cur < last ; cur = regnext( cur ) ) { | |
1402 | ||
c445ea15 AL |
1403 | regnode * const noper = NEXTOPER( cur ); |
1404 | U8 *uc = (U8*)STRING( noper ); | |
1405 | const U8 * const e = uc + STR_LEN( noper ); | |
1406 | U32 state = 1; /* required init */ | |
1407 | U16 charid = 0; /* sanity init */ | |
1408 | U8 *scan = (U8*)NULL; /* sanity init */ | |
1409 | STRLEN foldlen = 0; /* required init */ | |
07be1b83 | 1410 | U32 wordlen = 0; /* required init */ |
c445ea15 AL |
1411 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; |
1412 | ||
3dab1dad | 1413 | if (OP(noper) != NOTHING) { |
786e8c11 | 1414 | for ( ; uc < e ; uc += len ) { |
c445ea15 | 1415 | |
786e8c11 | 1416 | TRIE_READ_CHAR; |
c445ea15 | 1417 | |
786e8c11 YO |
1418 | if ( uvc < 256 ) { |
1419 | charid = trie->charmap[ uvc ]; | |
c445ea15 | 1420 | } else { |
786e8c11 YO |
1421 | SV** const svpp = hv_fetch( trie->widecharmap, (char*)&uvc, sizeof( UV ), 0); |
1422 | if ( !svpp ) { | |
1423 | charid = 0; | |
1424 | } else { | |
1425 | charid=(U16)SvIV( *svpp ); | |
1426 | } | |
c445ea15 | 1427 | } |
786e8c11 YO |
1428 | /* charid is now 0 if we dont know the char read, or nonzero if we do */ |
1429 | if ( charid ) { | |
a3621e74 | 1430 | |
786e8c11 YO |
1431 | U16 check; |
1432 | U32 newstate = 0; | |
a3621e74 | 1433 | |
786e8c11 YO |
1434 | charid--; |
1435 | if ( !trie->states[ state ].trans.list ) { | |
1436 | TRIE_LIST_NEW( state ); | |
c445ea15 | 1437 | } |
786e8c11 YO |
1438 | for ( check = 1; check <= TRIE_LIST_USED( state ); check++ ) { |
1439 | if ( TRIE_LIST_ITEM( state, check ).forid == charid ) { | |
1440 | newstate = TRIE_LIST_ITEM( state, check ).newstate; | |
1441 | break; | |
1442 | } | |
1443 | } | |
1444 | if ( ! newstate ) { | |
1445 | newstate = next_alloc++; | |
1446 | TRIE_LIST_PUSH( state, charid, newstate ); | |
1447 | transcount++; | |
1448 | } | |
1449 | state = newstate; | |
1450 | } else { | |
1451 | Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc ); | |
c445ea15 | 1452 | } |
a28509cc | 1453 | } |
c445ea15 | 1454 | } |
3dab1dad | 1455 | TRIE_HANDLE_WORD(state); |
a3621e74 YO |
1456 | |
1457 | } /* end second pass */ | |
1458 | ||
786e8c11 | 1459 | trie->laststate = next_alloc; |
a3621e74 YO |
1460 | Renew( trie->states, next_alloc, reg_trie_state ); |
1461 | ||
3dab1dad YO |
1462 | /* and now dump it out before we compress it */ |
1463 | DEBUG_TRIE_COMPILE_MORE_r( | |
1464 | dump_trie_interim_list(trie,next_alloc,depth+1) | |
a3621e74 | 1465 | ); |
a3621e74 | 1466 | |
a02a5408 | 1467 | Newxz( trie->trans, transcount ,reg_trie_trans ); |
a3621e74 YO |
1468 | { |
1469 | U32 state; | |
a3621e74 YO |
1470 | U32 tp = 0; |
1471 | U32 zp = 0; | |
1472 | ||
1473 | ||
1474 | for( state=1 ; state < next_alloc ; state ++ ) { | |
1475 | U32 base=0; | |
1476 | ||
1477 | /* | |
1478 | DEBUG_TRIE_COMPILE_MORE_r( | |
1479 | PerlIO_printf( Perl_debug_log, "tp: %d zp: %d ",tp,zp) | |
1480 | ); | |
1481 | */ | |
1482 | ||
1483 | if (trie->states[state].trans.list) { | |
1484 | U16 minid=TRIE_LIST_ITEM( state, 1).forid; | |
1485 | U16 maxid=minid; | |
a28509cc | 1486 | U16 idx; |
a3621e74 YO |
1487 | |
1488 | for( idx = 2 ; idx <= TRIE_LIST_USED( state ) ; idx++ ) { | |
c445ea15 AL |
1489 | const U16 forid = TRIE_LIST_ITEM( state, idx).forid; |
1490 | if ( forid < minid ) { | |
1491 | minid=forid; | |
1492 | } else if ( forid > maxid ) { | |
1493 | maxid=forid; | |
1494 | } | |
a3621e74 YO |
1495 | } |
1496 | if ( transcount < tp + maxid - minid + 1) { | |
1497 | transcount *= 2; | |
1498 | Renew( trie->trans, transcount, reg_trie_trans ); | |
1499 | Zero( trie->trans + (transcount / 2), transcount / 2 , reg_trie_trans ); | |
1500 | } | |
1501 | base = trie->uniquecharcount + tp - minid; | |
1502 | if ( maxid == minid ) { | |
1503 | U32 set = 0; | |
1504 | for ( ; zp < tp ; zp++ ) { | |
1505 | if ( ! trie->trans[ zp ].next ) { | |
1506 | base = trie->uniquecharcount + zp - minid; | |
1507 | trie->trans[ zp ].next = TRIE_LIST_ITEM( state, 1).newstate; | |
1508 | trie->trans[ zp ].check = state; | |
1509 | set = 1; | |
1510 | break; | |
1511 | } | |
1512 | } | |
1513 | if ( !set ) { | |
1514 | trie->trans[ tp ].next = TRIE_LIST_ITEM( state, 1).newstate; | |
1515 | trie->trans[ tp ].check = state; | |
1516 | tp++; | |
1517 | zp = tp; | |
1518 | } | |
1519 | } else { | |
1520 | for ( idx=1; idx <= TRIE_LIST_USED( state ) ; idx++ ) { | |
c445ea15 | 1521 | const U32 tid = base - trie->uniquecharcount + TRIE_LIST_ITEM( state, idx ).forid; |
a3621e74 YO |
1522 | trie->trans[ tid ].next = TRIE_LIST_ITEM( state, idx ).newstate; |
1523 | trie->trans[ tid ].check = state; | |
1524 | } | |
1525 | tp += ( maxid - minid + 1 ); | |
1526 | } | |
1527 | Safefree(trie->states[ state ].trans.list); | |
1528 | } | |
1529 | /* | |
1530 | DEBUG_TRIE_COMPILE_MORE_r( | |
1531 | PerlIO_printf( Perl_debug_log, " base: %d\n",base); | |
1532 | ); | |
1533 | */ | |
1534 | trie->states[ state ].trans.base=base; | |
1535 | } | |
cc601c31 | 1536 | trie->lasttrans = tp + 1; |
a3621e74 YO |
1537 | } |
1538 | } else { | |
1539 | /* | |
1540 | Second Pass -- Flat Table Representation. | |
1541 | ||
1542 | we dont use the 0 slot of either trans[] or states[] so we add 1 to each. | |
1543 | We know that we will need Charcount+1 trans at most to store the data | |
1544 | (one row per char at worst case) So we preallocate both structures | |
1545 | assuming worst case. | |
1546 | ||
1547 | We then construct the trie using only the .next slots of the entry | |
1548 | structs. | |
1549 | ||
1550 | We use the .check field of the first entry of the node temporarily to | |
1551 | make compression both faster and easier by keeping track of how many non | |
1552 | zero fields are in the node. | |
1553 | ||
1554 | Since trans are numbered from 1 any 0 pointer in the table is a FAIL | |
1555 | transition. | |
1556 | ||
1557 | There are two terms at use here: state as a TRIE_NODEIDX() which is a | |
1558 | number representing the first entry of the node, and state as a | |
1559 | TRIE_NODENUM() which is the trans number. state 1 is TRIE_NODEIDX(1) and | |
1560 | TRIE_NODENUM(1), state 2 is TRIE_NODEIDX(2) and TRIE_NODENUM(3) if there | |
1561 | are 2 entrys per node. eg: | |
1562 | ||
1563 | A B A B | |
1564 | 1. 2 4 1. 3 7 | |
1565 | 2. 0 3 3. 0 5 | |
1566 | 3. 0 0 5. 0 0 | |
1567 | 4. 0 0 7. 0 0 | |
1568 | ||
1569 | The table is internally in the right hand, idx form. However as we also | |
1570 | have to deal with the states array which is indexed by nodenum we have to | |
1571 | use TRIE_NODENUM() to convert. | |
1572 | ||
1573 | */ | |
1574 | ||
3dab1dad YO |
1575 | |
1576 | Newxz( trie->trans, ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1, | |
a3621e74 | 1577 | reg_trie_trans ); |
3dab1dad | 1578 | Newxz( trie->states, TRIE_CHARCOUNT(trie) + 2, reg_trie_state ); |
a3621e74 YO |
1579 | next_alloc = trie->uniquecharcount + 1; |
1580 | ||
3dab1dad | 1581 | |
a3621e74 YO |
1582 | for ( cur = first ; cur < last ; cur = regnext( cur ) ) { |
1583 | ||
c445ea15 | 1584 | regnode * const noper = NEXTOPER( cur ); |
a28509cc AL |
1585 | const U8 *uc = (U8*)STRING( noper ); |
1586 | const U8 * const e = uc + STR_LEN( noper ); | |
a3621e74 YO |
1587 | |
1588 | U32 state = 1; /* required init */ | |
1589 | ||
1590 | U16 charid = 0; /* sanity init */ | |
1591 | U32 accept_state = 0; /* sanity init */ | |
1592 | U8 *scan = (U8*)NULL; /* sanity init */ | |
1593 | ||
1594 | STRLEN foldlen = 0; /* required init */ | |
07be1b83 | 1595 | U32 wordlen = 0; /* required init */ |
a3621e74 YO |
1596 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; |
1597 | ||
3dab1dad | 1598 | if ( OP(noper) != NOTHING ) { |
786e8c11 | 1599 | for ( ; uc < e ; uc += len ) { |
a3621e74 | 1600 | |
786e8c11 | 1601 | TRIE_READ_CHAR; |
a3621e74 | 1602 | |
786e8c11 YO |
1603 | if ( uvc < 256 ) { |
1604 | charid = trie->charmap[ uvc ]; | |
1605 | } else { | |
1606 | SV* const * const svpp = hv_fetch( trie->widecharmap, (char*)&uvc, sizeof( UV ), 0); | |
1607 | charid = svpp ? (U16)SvIV(*svpp) : 0; | |
a3621e74 | 1608 | } |
786e8c11 YO |
1609 | if ( charid ) { |
1610 | charid--; | |
1611 | if ( !trie->trans[ state + charid ].next ) { | |
1612 | trie->trans[ state + charid ].next = next_alloc; | |
1613 | trie->trans[ state ].check++; | |
1614 | next_alloc += trie->uniquecharcount; | |
1615 | } | |
1616 | state = trie->trans[ state + charid ].next; | |
1617 | } else { | |
1618 | Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc ); | |
1619 | } | |
1620 | /* charid is now 0 if we dont know the char read, or nonzero if we do */ | |
a3621e74 | 1621 | } |
a3621e74 | 1622 | } |
3dab1dad YO |
1623 | accept_state = TRIE_NODENUM( state ); |
1624 | TRIE_HANDLE_WORD(accept_state); | |
a3621e74 YO |
1625 | |
1626 | } /* end second pass */ | |
1627 | ||
3dab1dad YO |
1628 | /* and now dump it out before we compress it */ |
1629 | DEBUG_TRIE_COMPILE_MORE_r( | |
1630 | dump_trie_interim_table(trie,next_alloc,depth+1) | |
1631 | ); | |
a3621e74 | 1632 | |
a3621e74 YO |
1633 | { |
1634 | /* | |
1635 | * Inplace compress the table.* | |
1636 | ||
1637 | For sparse data sets the table constructed by the trie algorithm will | |
1638 | be mostly 0/FAIL transitions or to put it another way mostly empty. | |
1639 | (Note that leaf nodes will not contain any transitions.) | |
1640 | ||
1641 | This algorithm compresses the tables by eliminating most such | |
1642 | transitions, at the cost of a modest bit of extra work during lookup: | |
1643 | ||
1644 | - Each states[] entry contains a .base field which indicates the | |
1645 | index in the state[] array wheres its transition data is stored. | |
1646 | ||
1647 | - If .base is 0 there are no valid transitions from that node. | |
1648 | ||
1649 | - If .base is nonzero then charid is added to it to find an entry in | |
1650 | the trans array. | |
1651 | ||
1652 | -If trans[states[state].base+charid].check!=state then the | |
1653 | transition is taken to be a 0/Fail transition. Thus if there are fail | |
1654 | transitions at the front of the node then the .base offset will point | |
1655 | somewhere inside the previous nodes data (or maybe even into a node | |
1656 | even earlier), but the .check field determines if the transition is | |
1657 | valid. | |
1658 | ||
786e8c11 | 1659 | XXX - wrong maybe? |
a3621e74 YO |
1660 | The following process inplace converts the table to the compressed |
1661 | table: We first do not compress the root node 1,and mark its all its | |
1662 | .check pointers as 1 and set its .base pointer as 1 as well. This | |
1663 | allows to do a DFA construction from the compressed table later, and | |
1664 | ensures that any .base pointers we calculate later are greater than | |
1665 | 0. | |
1666 | ||
1667 | - We set 'pos' to indicate the first entry of the second node. | |
1668 | ||
1669 | - We then iterate over the columns of the node, finding the first and | |
1670 | last used entry at l and m. We then copy l..m into pos..(pos+m-l), | |
1671 | and set the .check pointers accordingly, and advance pos | |
1672 | appropriately and repreat for the next node. Note that when we copy | |
1673 | the next pointers we have to convert them from the original | |
1674 | NODEIDX form to NODENUM form as the former is not valid post | |
1675 | compression. | |
1676 | ||
1677 | - If a node has no transitions used we mark its base as 0 and do not | |
1678 | advance the pos pointer. | |
1679 | ||
1680 | - If a node only has one transition we use a second pointer into the | |
1681 | structure to fill in allocated fail transitions from other states. | |
1682 | This pointer is independent of the main pointer and scans forward | |
1683 | looking for null transitions that are allocated to a state. When it | |
1684 | finds one it writes the single transition into the "hole". If the | |
786e8c11 | 1685 | pointer doesnt find one the single transition is appended as normal. |
a3621e74 YO |
1686 | |
1687 | - Once compressed we can Renew/realloc the structures to release the | |
1688 | excess space. | |
1689 | ||
1690 | See "Table-Compression Methods" in sec 3.9 of the Red Dragon, | |
1691 | specifically Fig 3.47 and the associated pseudocode. | |
1692 | ||
1693 | demq | |
1694 | */ | |
a3b680e6 | 1695 | const U32 laststate = TRIE_NODENUM( next_alloc ); |
a28509cc | 1696 | U32 state, charid; |
a3621e74 | 1697 | U32 pos = 0, zp=0; |
786e8c11 | 1698 | trie->laststate = laststate; |
a3621e74 YO |
1699 | |
1700 | for ( state = 1 ; state < laststate ; state++ ) { | |
1701 | U8 flag = 0; | |
a28509cc AL |
1702 | const U32 stateidx = TRIE_NODEIDX( state ); |
1703 | const U32 o_used = trie->trans[ stateidx ].check; | |
1704 | U32 used = trie->trans[ stateidx ].check; | |
a3621e74 YO |
1705 | trie->trans[ stateidx ].check = 0; |
1706 | ||
1707 | for ( charid = 0 ; used && charid < trie->uniquecharcount ; charid++ ) { | |
1708 | if ( flag || trie->trans[ stateidx + charid ].next ) { | |
1709 | if ( trie->trans[ stateidx + charid ].next ) { | |
1710 | if (o_used == 1) { | |
1711 | for ( ; zp < pos ; zp++ ) { | |
1712 | if ( ! trie->trans[ zp ].next ) { | |
1713 | break; | |
1714 | } | |
1715 | } | |
1716 | trie->states[ state ].trans.base = zp + trie->uniquecharcount - charid ; | |
1717 | trie->trans[ zp ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next ); | |
1718 | trie->trans[ zp ].check = state; | |
1719 | if ( ++zp > pos ) pos = zp; | |
1720 | break; | |
1721 | } | |
1722 | used--; | |
1723 | } | |
1724 | if ( !flag ) { | |
1725 | flag = 1; | |
1726 | trie->states[ state ].trans.base = pos + trie->uniquecharcount - charid ; | |
1727 | } | |
1728 | trie->trans[ pos ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next ); | |
1729 | trie->trans[ pos ].check = state; | |
1730 | pos++; | |
1731 | } | |
1732 | } | |
1733 | } | |
cc601c31 | 1734 | trie->lasttrans = pos + 1; |
a3621e74 YO |
1735 | Renew( trie->states, laststate + 1, reg_trie_state); |
1736 | DEBUG_TRIE_COMPILE_MORE_r( | |
e4584336 | 1737 | PerlIO_printf( Perl_debug_log, |
3dab1dad YO |
1738 | "%*sAlloc: %d Orig: %"IVdf" elements, Final:%"IVdf". Savings of %%%5.2f\n", |
1739 | (int)depth * 2 + 2,"", | |
1740 | (int)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1 ), | |
5d7488b2 AL |
1741 | (IV)next_alloc, |
1742 | (IV)pos, | |
a3621e74 YO |
1743 | ( ( next_alloc - pos ) * 100 ) / (double)next_alloc ); |
1744 | ); | |
1745 | ||
1746 | } /* end table compress */ | |
1747 | } | |
cc601c31 YO |
1748 | /* resize the trans array to remove unused space */ |
1749 | Renew( trie->trans, trie->lasttrans, reg_trie_trans); | |
a3621e74 | 1750 | |
3dab1dad YO |
1751 | /* and now dump out the compressed format */ |
1752 | DEBUG_TRIE_COMPILE_r( | |
1753 | dump_trie(trie,depth+1) | |
1754 | ); | |
07be1b83 | 1755 | |
3dab1dad YO |
1756 | { /* Modify the program and insert the new TRIE node*/ |
1757 | regnode *convert; | |
1758 | U8 nodetype =(U8)(flags & 0xFF); | |
1759 | char *str=NULL; | |
786e8c11 | 1760 | |
07be1b83 | 1761 | #ifdef DEBUGGING |
e62cc96a | 1762 | regnode *optimize = NULL; |
b57a0404 JH |
1763 | U32 mjd_offset = 0; |
1764 | U32 mjd_nodelen = 0; | |
07be1b83 | 1765 | #endif |
a3621e74 | 1766 | /* |
3dab1dad YO |
1767 | This means we convert either the first branch or the first Exact, |
1768 | depending on whether the thing following (in 'last') is a branch | |
1769 | or not and whther first is the startbranch (ie is it a sub part of | |
1770 | the alternation or is it the whole thing.) | |
1771 | Assuming its a sub part we conver the EXACT otherwise we convert | |
1772 | the whole branch sequence, including the first. | |
a3621e74 | 1773 | */ |
3dab1dad YO |
1774 | /* Find the node we are going to overwrite */ |
1775 | if ( first == startbranch && OP( last ) != BRANCH ) { | |
07be1b83 | 1776 | /* whole branch chain */ |
3dab1dad | 1777 | convert = first; |
07be1b83 YO |
1778 | DEBUG_r({ |
1779 | const regnode *nop = NEXTOPER( convert ); | |
1780 | mjd_offset= Node_Offset((nop)); | |
1781 | mjd_nodelen= Node_Length((nop)); | |
1782 | }); | |
1783 | } else { | |
1784 | /* branch sub-chain */ | |
3dab1dad YO |
1785 | convert = NEXTOPER( first ); |
1786 | NEXT_OFF( first ) = (U16)(last - first); | |
07be1b83 YO |
1787 | DEBUG_r({ |
1788 | mjd_offset= Node_Offset((convert)); | |
1789 | mjd_nodelen= Node_Length((convert)); | |
1790 | }); | |
1791 | } | |
1792 | DEBUG_OPTIMISE_r( | |
1793 | PerlIO_printf(Perl_debug_log, "%*sMJD offset:%"UVuf" MJD length:%"UVuf"\n", | |
1794 | (int)depth * 2 + 2, "", | |
786e8c11 | 1795 | (UV)mjd_offset, (UV)mjd_nodelen) |
07be1b83 | 1796 | ); |
a3621e74 | 1797 | |
3dab1dad YO |
1798 | /* But first we check to see if there is a common prefix we can |
1799 | split out as an EXACT and put in front of the TRIE node. */ | |
1800 | trie->startstate= 1; | |
786e8c11 | 1801 | if ( trie->bitmap && !trie->widecharmap && !trie->jump ) { |
3dab1dad YO |
1802 | U32 state; |
1803 | DEBUG_OPTIMISE_r( | |
8e11feef RGS |
1804 | PerlIO_printf(Perl_debug_log, "%*sLaststate:%"UVuf"\n", |
1805 | (int)depth * 2 + 2, "", | |
786e8c11 | 1806 | (UV)trie->laststate) |
8e11feef | 1807 | ); |
786e8c11 | 1808 | for ( state = 1 ; state < trie->laststate-1 ; state++ ) { |
a3621e74 | 1809 | U32 ofs = 0; |
8e11feef RGS |
1810 | I32 idx = -1; |
1811 | U32 count = 0; | |
1812 | const U32 base = trie->states[ state ].trans.base; | |
a3621e74 | 1813 | |
3dab1dad | 1814 | if ( trie->states[state].wordnum ) |
8e11feef | 1815 | count = 1; |
a3621e74 | 1816 | |
8e11feef | 1817 | for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) { |
cc601c31 YO |
1818 | if ( ( base + ofs >= trie->uniquecharcount ) && |
1819 | ( base + ofs - trie->uniquecharcount < trie->lasttrans ) && | |
a3621e74 YO |
1820 | trie->trans[ base + ofs - trie->uniquecharcount ].check == state ) |
1821 | { | |
3dab1dad | 1822 | if ( ++count > 1 ) { |
8e11feef | 1823 | SV **tmp = av_fetch( TRIE_REVCHARMAP(trie), ofs, 0); |
07be1b83 | 1824 | const U8 *ch = (U8*)SvPV_nolen_const( *tmp ); |
8e11feef | 1825 | if ( state == 1 ) break; |
3dab1dad YO |
1826 | if ( count == 2 ) { |
1827 | Zero(trie->bitmap, ANYOF_BITMAP_SIZE, char); | |
1828 | DEBUG_OPTIMISE_r( | |
8e11feef RGS |
1829 | PerlIO_printf(Perl_debug_log, |
1830 | "%*sNew Start State=%"UVuf" Class: [", | |
1831 | (int)depth * 2 + 2, "", | |
786e8c11 | 1832 | (UV)state)); |
be8e71aa YO |
1833 | if (idx >= 0) { |
1834 | SV ** const tmp = av_fetch( TRIE_REVCHARMAP(trie), idx, 0); | |
1835 | const U8 * const ch = (U8*)SvPV_nolen_const( *tmp ); | |
8e11feef | 1836 | |
3dab1dad | 1837 | TRIE_BITMAP_SET(trie,*ch); |
8e11feef RGS |
1838 | if ( folder ) |
1839 | TRIE_BITMAP_SET(trie, folder[ *ch ]); | |
3dab1dad | 1840 | DEBUG_OPTIMISE_r( |
07be1b83 | 1841 | PerlIO_printf(Perl_debug_log, (char*)ch) |
3dab1dad | 1842 | ); |
8e11feef RGS |
1843 | } |
1844 | } | |
1845 | TRIE_BITMAP_SET(trie,*ch); | |
1846 | if ( folder ) | |
1847 | TRIE_BITMAP_SET(trie,folder[ *ch ]); | |
1848 | DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"%s", ch)); | |
1849 | } | |
1850 | idx = ofs; | |
1851 | } | |
3dab1dad YO |
1852 | } |
1853 | if ( count == 1 ) { | |
1854 | SV **tmp = av_fetch( TRIE_REVCHARMAP(trie), idx, 0); | |
8e11feef | 1855 | const char *ch = SvPV_nolen_const( *tmp ); |
3dab1dad | 1856 | DEBUG_OPTIMISE_r( |
8e11feef RGS |
1857 | PerlIO_printf( Perl_debug_log, |
1858 | "%*sPrefix State: %"UVuf" Idx:%"UVuf" Char='%s'\n", | |
1859 | (int)depth * 2 + 2, "", | |
786e8c11 | 1860 | (UV)state, (UV)idx, ch) |
3dab1dad YO |
1861 | ); |
1862 | if ( state==1 ) { | |
1863 | OP( convert ) = nodetype; | |
1864 | str=STRING(convert); | |
1865 | STR_LEN(convert)=0; | |
1866 | } | |
1867 | *str++=*ch; | |
1868 | STR_LEN(convert)++; | |
a3621e74 | 1869 | |
8e11feef | 1870 | } else { |
f9049ba1 | 1871 | #ifdef DEBUGGING |
8e11feef RGS |
1872 | if (state>1) |
1873 | DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"]\n")); | |
f9049ba1 | 1874 | #endif |
8e11feef RGS |
1875 | break; |
1876 | } | |
1877 | } | |
3dab1dad | 1878 | if (str) { |
8e11feef | 1879 | regnode *n = convert+NODE_SZ_STR(convert); |
07be1b83 | 1880 | NEXT_OFF(convert) = NODE_SZ_STR(convert); |
8e11feef | 1881 | trie->startstate = state; |
07be1b83 YO |
1882 | trie->minlen -= (state - 1); |
1883 | trie->maxlen -= (state - 1); | |
1884 | DEBUG_r({ | |
1885 | regnode *fix = convert; | |
1886 | mjd_nodelen++; | |
1887 | Set_Node_Offset_Length(convert, mjd_offset, state - 1); | |
1888 | while( ++fix < n ) { | |
1889 | Set_Node_Offset_Length(fix, 0, 0); | |
1890 | } | |
1891 | }); | |
8e11feef RGS |
1892 | if (trie->maxlen) { |
1893 | convert = n; | |
1894 | } else { | |
3dab1dad | 1895 | NEXT_OFF(convert) = (U16)(tail - convert); |
a5ca303d | 1896 | DEBUG_r(optimize= n); |
3dab1dad YO |
1897 | } |
1898 | } | |
1899 | } | |
a5ca303d YO |
1900 | if (!jumper) |
1901 | jumper = last; | |
3dab1dad | 1902 | if ( trie->maxlen ) { |
8e11feef RGS |
1903 | NEXT_OFF( convert ) = (U16)(tail - convert); |
1904 | ARG_SET( convert, data_slot ); | |
786e8c11 YO |
1905 | /* Store the offset to the first unabsorbed branch in |
1906 | jump[0], which is otherwise unused by the jump logic. | |
1907 | We use this when dumping a trie and during optimisation. */ | |
1908 | if (trie->jump) | |
1909 | trie->jump[0] = (U16)(tail - nextbranch); | |
a5ca303d | 1910 | |
786e8c11 YO |
1911 | /* XXXX */ |
1912 | if ( !trie->states[trie->startstate].wordnum && trie->bitmap && | |
1de06328 | 1913 | ( (char *)jumper - (char *)convert) >= (int)sizeof(struct regnode_charclass) ) |
786e8c11 YO |
1914 | { |
1915 | OP( convert ) = TRIEC; | |
1916 | Copy(trie->bitmap, ((struct regnode_charclass *)convert)->bitmap, ANYOF_BITMAP_SIZE, char); | |
1917 | Safefree(trie->bitmap); | |
1918 | trie->bitmap= NULL; | |
1919 | } else | |
1920 | OP( convert ) = TRIE; | |
a3621e74 | 1921 | |
3dab1dad YO |
1922 | /* store the type in the flags */ |
1923 | convert->flags = nodetype; | |
a5ca303d YO |
1924 | DEBUG_r({ |
1925 | optimize = convert | |
1926 | + NODE_STEP_REGNODE | |
1927 | + regarglen[ OP( convert ) ]; | |
1928 | }); | |
1929 | /* XXX We really should free up the resource in trie now, | |
1930 | as we won't use them - (which resources?) dmq */ | |
3dab1dad | 1931 | } |
a3621e74 | 1932 | /* needed for dumping*/ |
e62cc96a | 1933 | DEBUG_r(if (optimize) { |
07be1b83 | 1934 | regnode *opt = convert; |
e62cc96a | 1935 | while ( ++opt < optimize) { |
07be1b83 YO |
1936 | Set_Node_Offset_Length(opt,0,0); |
1937 | } | |
786e8c11 YO |
1938 | /* |
1939 | Try to clean up some of the debris left after the | |
1940 | optimisation. | |
a3621e74 | 1941 | */ |
786e8c11 | 1942 | while( optimize < jumper ) { |
07be1b83 | 1943 | mjd_nodelen += Node_Length((optimize)); |
a3621e74 | 1944 | OP( optimize ) = OPTIMIZED; |
07be1b83 | 1945 | Set_Node_Offset_Length(optimize,0,0); |
a3621e74 YO |
1946 | optimize++; |
1947 | } | |
07be1b83 | 1948 | Set_Node_Offset_Length(convert,mjd_offset,mjd_nodelen); |
a3621e74 YO |
1949 | }); |
1950 | } /* end node insert */ | |
07be1b83 | 1951 | #ifndef DEBUGGING |
6e8b4190 | 1952 | SvREFCNT_dec(TRIE_REVCHARMAP(trie)); |
07be1b83 | 1953 | #endif |
786e8c11 YO |
1954 | return trie->jump |
1955 | ? MADE_JUMP_TRIE | |
1956 | : trie->startstate>1 | |
1957 | ? MADE_EXACT_TRIE | |
1958 | : MADE_TRIE; | |
1959 | } | |
1960 | ||
1961 | STATIC void | |
1962 | S_make_trie_failtable(pTHX_ RExC_state_t *pRExC_state, regnode *source, regnode *stclass, U32 depth) | |
1963 | { | |
1964 | /* The Trie is constructed and compressed now so we can build a fail array now if its needed | |
1965 | ||
1966 | This is basically the Aho-Corasick algorithm. Its from exercise 3.31 and 3.32 in the | |
1967 | "Red Dragon" -- Compilers, principles, techniques, and tools. Aho, Sethi, Ullman 1985/88 | |
1968 | ISBN 0-201-10088-6 | |
1969 | ||
1970 | We find the fail state for each state in the trie, this state is the longest proper | |
1971 | suffix of the current states 'word' that is also a proper prefix of another word in our | |
1972 | trie. State 1 represents the word '' and is the thus the default fail state. This allows | |
1973 | the DFA not to have to restart after its tried and failed a word at a given point, it | |
1974 | simply continues as though it had been matching the other word in the first place. | |
1975 | Consider | |
1976 | 'abcdgu'=~/abcdefg|cdgu/ | |
1977 | When we get to 'd' we are still matching the first word, we would encounter 'g' which would | |
1978 | fail, which would bring use to the state representing 'd' in the second word where we would | |
1979 | try 'g' and succeed, prodceding to match 'cdgu'. | |
1980 | */ | |
1981 | /* add a fail transition */ | |
1982 | reg_trie_data *trie=(reg_trie_data *)RExC_rx->data->data[ARG(source)]; | |
1983 | U32 *q; | |
1984 | const U32 ucharcount = trie->uniquecharcount; | |
1985 | const U32 numstates = trie->laststate; | |
1986 | const U32 ubound = trie->lasttrans + ucharcount; | |
1987 | U32 q_read = 0; | |
1988 | U32 q_write = 0; | |
1989 | U32 charid; | |
1990 | U32 base = trie->states[ 1 ].trans.base; | |
1991 | U32 *fail; | |
1992 | reg_ac_data *aho; | |
1993 | const U32 data_slot = add_data( pRExC_state, 1, "T" ); | |
1994 | GET_RE_DEBUG_FLAGS_DECL; | |
1995 | #ifndef DEBUGGING | |
1996 | PERL_UNUSED_ARG(depth); | |
1997 | #endif | |
1998 | ||
1999 | ||
2000 | ARG_SET( stclass, data_slot ); | |
2001 | Newxz( aho, 1, reg_ac_data ); | |
2002 | RExC_rx->data->data[ data_slot ] = (void*)aho; | |
2003 | aho->trie=trie; | |
2004 | aho->states=(reg_trie_state *)savepvn((const char*)trie->states, | |
2005 | (trie->laststate+1)*sizeof(reg_trie_state)); | |
2006 | Newxz( q, numstates, U32); | |
2007 | Newxz( aho->fail, numstates, U32 ); | |
2008 | aho->refcount = 1; | |
2009 | fail = aho->fail; | |
2010 | /* initialize fail[0..1] to be 1 so that we always have | |
2011 | a valid final fail state */ | |
2012 | fail[ 0 ] = fail[ 1 ] = 1; | |
2013 | ||
2014 | for ( charid = 0; charid < ucharcount ; charid++ ) { | |
2015 | const U32 newstate = TRIE_TRANS_STATE( 1, base, ucharcount, charid, 0 ); | |
2016 | if ( newstate ) { | |
2017 | q[ q_write ] = newstate; | |
2018 | /* set to point at the root */ | |
2019 | fail[ q[ q_write++ ] ]=1; | |
2020 | } | |
2021 | } | |
2022 | while ( q_read < q_write) { | |
2023 | const U32 cur = q[ q_read++ % numstates ]; | |
2024 | base = trie->states[ cur ].trans.base; | |
2025 | ||
2026 | for ( charid = 0 ; charid < ucharcount ; charid++ ) { | |
2027 | const U32 ch_state = TRIE_TRANS_STATE( cur, base, ucharcount, charid, 1 ); | |
2028 | if (ch_state) { | |
2029 | U32 fail_state = cur; | |
2030 | U32 fail_base; | |
2031 | do { | |
2032 | fail_state = fail[ fail_state ]; | |
2033 | fail_base = aho->states[ fail_state ].trans.base; | |
2034 | } while ( !TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ) ); | |
2035 | ||
2036 | fail_state = TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ); | |
2037 | fail[ ch_state ] = fail_state; | |
2038 | if ( !aho->states[ ch_state ].wordnum && aho->states[ fail_state ].wordnum ) | |
2039 | { | |
2040 | aho->states[ ch_state ].wordnum = aho->states[ fail_state ].wordnum; | |
2041 | } | |
2042 | q[ q_write++ % numstates] = ch_state; | |
2043 | } | |
2044 | } | |
2045 | } | |
2046 | /* restore fail[0..1] to 0 so that we "fall out" of the AC loop | |
2047 | when we fail in state 1, this allows us to use the | |
2048 | charclass scan to find a valid start char. This is based on the principle | |
2049 | that theres a good chance the string being searched contains lots of stuff | |
2050 | that cant be a start char. | |
2051 | */ | |
2052 | fail[ 0 ] = fail[ 1 ] = 0; | |
2053 | DEBUG_TRIE_COMPILE_r({ | |
2054 | PerlIO_printf(Perl_debug_log, "%*sStclass Failtable: 0", (int)(depth * 2), ""); | |
2055 | for( q_read=1; q_read<numstates; q_read++ ) { | |
2056 | PerlIO_printf(Perl_debug_log, ", %"UVuf, (UV)fail[q_read]); | |
2057 | } | |
2058 | PerlIO_printf(Perl_debug_log, "\n"); | |
2059 | }); | |
2060 | Safefree(q); | |
2061 | /*RExC_seen |= REG_SEEN_TRIEDFA;*/ | |
a3621e74 YO |
2062 | } |
2063 | ||
786e8c11 | 2064 | |
a3621e74 | 2065 | /* |
5d1c421c JH |
2066 | * There are strange code-generation bugs caused on sparc64 by gcc-2.95.2. |
2067 | * These need to be revisited when a newer toolchain becomes available. | |
2068 | */ | |
2069 | #if defined(__sparc64__) && defined(__GNUC__) | |
2070 | # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96) | |
2071 | # undef SPARC64_GCC_WORKAROUND | |
2072 | # define SPARC64_GCC_WORKAROUND 1 | |
2073 | # endif | |
2074 | #endif | |
2075 | ||
07be1b83 YO |
2076 | #define DEBUG_PEEP(str,scan,depth) \ |
2077 | DEBUG_OPTIMISE_r({ \ | |
2078 | SV * const mysv=sv_newmortal(); \ | |
2079 | regnode *Next = regnext(scan); \ | |
2080 | regprop(RExC_rx, mysv, scan); \ | |
2081 | PerlIO_printf(Perl_debug_log, "%*s" str ">%3d: %s [%d]\n", \ | |
2082 | (int)depth*2, "", REG_NODE_NUM(scan), SvPV_nolen_const(mysv),\ | |
2083 | Next ? (REG_NODE_NUM(Next)) : 0 ); \ | |
2084 | }); | |
2085 | ||
1de06328 YO |
2086 | |
2087 | ||
2088 | ||
2089 | ||
07be1b83 YO |
2090 | #define JOIN_EXACT(scan,min,flags) \ |
2091 | if (PL_regkind[OP(scan)] == EXACT) \ | |
2092 | join_exact(pRExC_state,(scan),(min),(flags),NULL,depth+1) | |
2093 | ||
be8e71aa | 2094 | STATIC U32 |
07be1b83 YO |
2095 | S_join_exact(pTHX_ RExC_state_t *pRExC_state, regnode *scan, I32 *min, U32 flags,regnode *val, U32 depth) { |
2096 | /* Merge several consecutive EXACTish nodes into one. */ | |
2097 | regnode *n = regnext(scan); | |
2098 | U32 stringok = 1; | |
2099 | regnode *next = scan + NODE_SZ_STR(scan); | |
2100 | U32 merged = 0; | |
2101 | U32 stopnow = 0; | |
2102 | #ifdef DEBUGGING | |
2103 | regnode *stop = scan; | |
72f13be8 | 2104 | GET_RE_DEBUG_FLAGS_DECL; |
f9049ba1 | 2105 | #else |
d47053eb RGS |
2106 | PERL_UNUSED_ARG(depth); |
2107 | #endif | |
2108 | #ifndef EXPERIMENTAL_INPLACESCAN | |
f9049ba1 SP |
2109 | PERL_UNUSED_ARG(flags); |
2110 | PERL_UNUSED_ARG(val); | |
07be1b83 | 2111 | #endif |
07be1b83 YO |
2112 | DEBUG_PEEP("join",scan,depth); |
2113 | ||
2114 | /* Skip NOTHING, merge EXACT*. */ | |
2115 | while (n && | |
2116 | ( PL_regkind[OP(n)] == NOTHING || | |
2117 | (stringok && (OP(n) == OP(scan)))) | |
2118 | && NEXT_OFF(n) | |
2119 | && NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) { | |
2120 | ||
2121 | if (OP(n) == TAIL || n > next) | |
2122 | stringok = 0; | |
2123 | if (PL_regkind[OP(n)] == NOTHING) { | |
07be1b83 YO |
2124 | DEBUG_PEEP("skip:",n,depth); |
2125 | NEXT_OFF(scan) += NEXT_OFF(n); | |
2126 | next = n + NODE_STEP_REGNODE; | |
2127 | #ifdef DEBUGGING | |
2128 | if (stringok) | |
2129 | stop = n; | |
2130 | #endif | |
2131 | n = regnext(n); | |
2132 | } | |
2133 | else if (stringok) { | |
786e8c11 | 2134 | const unsigned int oldl = STR_LEN(scan); |
07be1b83 YO |
2135 | regnode * const nnext = regnext(n); |
2136 | ||
2137 | DEBUG_PEEP("merg",n,depth); | |
2138 | ||
2139 | merged++; | |
2140 | if (oldl + STR_LEN(n) > U8_MAX) | |
2141 | break; | |
2142 | NEXT_OFF(scan) += NEXT_OFF(n); | |
2143 | STR_LEN(scan) += STR_LEN(n); | |
2144 | next = n + NODE_SZ_STR(n); | |
2145 | /* Now we can overwrite *n : */ | |
2146 | Move(STRING(n), STRING(scan) + oldl, STR_LEN(n), char); | |
2147 | #ifdef DEBUGGING | |
2148 | stop = next - 1; | |
2149 | #endif | |
2150 | n = nnext; | |
2151 | if (stopnow) break; | |
2152 | } | |
2153 | ||
d47053eb RGS |
2154 | #ifdef EXPERIMENTAL_INPLACESCAN |
2155 | if (flags && !NEXT_OFF(n)) { | |
2156 | DEBUG_PEEP("atch", val, depth); | |
2157 | if (reg_off_by_arg[OP(n)]) { | |
2158 | ARG_SET(n, val - n); | |
2159 | } | |
2160 | else { | |
2161 | NEXT_OFF(n) = val - n; | |
2162 | } | |
2163 | stopnow = 1; | |
2164 | } | |
07be1b83 YO |
2165 | #endif |
2166 | } | |
2167 | ||
2168 | if (UTF && ( OP(scan) == EXACTF ) && ( STR_LEN(scan) >= 6 ) ) { | |
2169 | /* | |
2170 | Two problematic code points in Unicode casefolding of EXACT nodes: | |
2171 | ||
2172 | U+0390 - GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS | |
2173 | U+03B0 - GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND TONOS | |
2174 | ||
2175 | which casefold to | |
2176 | ||
2177 | Unicode UTF-8 | |
2178 | ||
2179 | U+03B9 U+0308 U+0301 0xCE 0xB9 0xCC 0x88 0xCC 0x81 | |
2180 | U+03C5 U+0308 U+0301 0xCF 0x85 0xCC 0x88 0xCC 0x81 | |
2181 | ||
2182 | This means that in case-insensitive matching (or "loose matching", | |
2183 | as Unicode calls it), an EXACTF of length six (the UTF-8 encoded byte | |
2184 | length of the above casefolded versions) can match a target string | |
2185 | of length two (the byte length of UTF-8 encoded U+0390 or U+03B0). | |
2186 | This would rather mess up the minimum length computation. | |
2187 | ||
2188 | What we'll do is to look for the tail four bytes, and then peek | |
2189 | at the preceding two bytes to see whether we need to decrease | |
2190 | the minimum length by four (six minus two). | |
2191 | ||
2192 | Thanks to the design of UTF-8, there cannot be false matches: | |
2193 | A sequence of valid UTF-8 bytes cannot be a subsequence of | |
2194 | another valid sequence of UTF-8 bytes. | |
2195 | ||
2196 | */ | |
2197 | char * const s0 = STRING(scan), *s, *t; | |
2198 | char * const s1 = s0 + STR_LEN(scan) - 1; | |
2199 | char * const s2 = s1 - 4; | |
e294cc5d JH |
2200 | #ifdef EBCDIC /* RD tunifold greek 0390 and 03B0 */ |
2201 | const char t0[] = "\xaf\x49\xaf\x42"; | |
2202 | #else | |
07be1b83 | 2203 | const char t0[] = "\xcc\x88\xcc\x81"; |
e294cc5d | 2204 | #endif |
07be1b83 YO |
2205 | const char * const t1 = t0 + 3; |
2206 | ||
2207 | for (s = s0 + 2; | |
2208 | s < s2 && (t = ninstr(s, s1, t0, t1)); | |
2209 | s = t + 4) { | |
e294cc5d JH |
2210 | #ifdef EBCDIC |
2211 | if (((U8)t[-1] == 0x68 && (U8)t[-2] == 0xB4) || | |
2212 | ((U8)t[-1] == 0x46 && (U8)t[-2] == 0xB5)) | |
2213 | #else | |
07be1b83 YO |
2214 | if (((U8)t[-1] == 0xB9 && (U8)t[-2] == 0xCE) || |
2215 | ((U8)t[-1] == 0x85 && (U8)t[-2] == 0xCF)) | |
e294cc5d | 2216 | #endif |
07be1b83 YO |
2217 | *min -= 4; |
2218 | } | |
2219 | } | |
2220 | ||
2221 | #ifdef DEBUGGING | |
2222 | /* Allow dumping */ | |
2223 | n = scan + NODE_SZ_STR(scan); | |
2224 | while (n <= stop) { | |
2225 | if (PL_regkind[OP(n)] != NOTHING || OP(n) == NOTHING) { | |
2226 | OP(n) = OPTIMIZED; | |
2227 | NEXT_OFF(n) = 0; | |
2228 | } | |
2229 | n++; | |
2230 | } | |
2231 | #endif | |
2232 | DEBUG_OPTIMISE_r(if (merged){DEBUG_PEEP("finl",scan,depth)}); | |
2233 | return stopnow; | |
2234 | } | |
2235 | ||
653099ff GS |
2236 | /* REx optimizer. Converts nodes into quickier variants "in place". |
2237 | Finds fixed substrings. */ | |
2238 | ||
a0288114 | 2239 | /* Stops at toplevel WHILEM as well as at "last". At end *scanp is set |
c277df42 IZ |
2240 | to the position after last scanned or to NULL. */ |
2241 | ||
07be1b83 YO |
2242 | |
2243 | ||
76e3520e | 2244 | STATIC I32 |
1de06328 YO |
2245 | S_study_chunk(pTHX_ RExC_state_t *pRExC_state, regnode **scanp, |
2246 | I32 *minlenp, I32 *deltap, | |
9a957fbc | 2247 | regnode *last, scan_data_t *data, U32 flags, U32 depth) |
c277df42 IZ |
2248 | /* scanp: Start here (read-write). */ |
2249 | /* deltap: Write maxlen-minlen here. */ | |
2250 | /* last: Stop before this one. */ | |
2251 | { | |
97aff369 | 2252 | dVAR; |
c277df42 IZ |
2253 | I32 min = 0, pars = 0, code; |
2254 | regnode *scan = *scanp, *next; | |
2255 | I32 delta = 0; | |
2256 | int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF); | |
aca2d497 | 2257 | int is_inf_internal = 0; /* The studied chunk is infinite */ |
c277df42 IZ |
2258 | I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0; |
2259 | scan_data_t data_fake; | |
653099ff | 2260 | struct regnode_charclass_class and_with; /* Valid if flags & SCF_DO_STCLASS_OR */ |
a3621e74 | 2261 | SV *re_trie_maxbuff = NULL; |
786e8c11 YO |
2262 | regnode *first_non_open = scan; |
2263 | ||
a3621e74 YO |
2264 | |
2265 | GET_RE_DEBUG_FLAGS_DECL; | |
13a24bad YO |
2266 | #ifdef DEBUGGING |
2267 | StructCopy(&zero_scan_data, &data_fake, scan_data_t); | |
2268 | #endif | |
786e8c11 YO |
2269 | if ( depth == 0 ) { |
2270 | while (first_non_open && OP(first_non_open) == OPEN) | |
2271 | first_non_open=regnext(first_non_open); | |
2272 | } | |
2273 | ||
b81d288d | 2274 | |
c277df42 IZ |
2275 | while (scan && OP(scan) != END && scan < last) { |
2276 | /* Peephole optimizer: */ | |
1de06328 | 2277 | DEBUG_STUDYDATA(data,depth); |
07be1b83 | 2278 | DEBUG_PEEP("Peep",scan,depth); |
07be1b83 | 2279 | JOIN_EXACT(scan,&min,0); |
a3621e74 | 2280 | |
653099ff GS |
2281 | /* Follow the next-chain of the current node and optimize |
2282 | away all the NOTHINGs from it. */ | |
c277df42 | 2283 | if (OP(scan) != CURLYX) { |
a3b680e6 | 2284 | const int max = (reg_off_by_arg[OP(scan)] |
048cfca1 GS |
2285 | ? I32_MAX |
2286 | /* I32 may be smaller than U16 on CRAYs! */ | |
2287 | : (I32_MAX < U16_MAX ? I32_MAX : U16_MAX)); | |
c277df42 IZ |
2288 | int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan)); |
2289 | int noff; | |
2290 | regnode *n = scan; | |
b81d288d | 2291 | |
c277df42 IZ |
2292 | /* Skip NOTHING and LONGJMP. */ |
2293 | while ((n = regnext(n)) | |
3dab1dad | 2294 | && ((PL_regkind[OP(n)] == NOTHING && (noff = NEXT_OFF(n))) |
c277df42 IZ |
2295 | || ((OP(n) == LONGJMP) && (noff = ARG(n)))) |
2296 | && off + noff < max) | |
2297 | off += noff; | |
2298 | if (reg_off_by_arg[OP(scan)]) | |
2299 | ARG(scan) = off; | |
b81d288d | 2300 | else |
c277df42 IZ |
2301 | NEXT_OFF(scan) = off; |
2302 | } | |
a3621e74 | 2303 | |
07be1b83 | 2304 | |
3dab1dad | 2305 | |
653099ff GS |
2306 | /* The principal pseudo-switch. Cannot be a switch, since we |
2307 | look into several different things. */ | |
b81d288d | 2308 | if (OP(scan) == BRANCH || OP(scan) == BRANCHJ |
c277df42 IZ |
2309 | || OP(scan) == IFTHEN || OP(scan) == SUSPEND) { |
2310 | next = regnext(scan); | |
2311 | code = OP(scan); | |
a3621e74 | 2312 | /* demq: the op(next)==code check is to see if we have "branch-branch" AFAICT */ |
b81d288d AB |
2313 | |
2314 | if (OP(next) == code || code == IFTHEN || code == SUSPEND) { | |
786e8c11 YO |
2315 | /* NOTE - There is similar code to this block below for handling |
2316 | TRIE nodes on a re-study. If you change stuff here check there | |
2317 | too. */ | |
c277df42 | 2318 | I32 max1 = 0, min1 = I32_MAX, num = 0; |
653099ff | 2319 | struct regnode_charclass_class accum; |
d4c19fe8 | 2320 | regnode * const startbranch=scan; |
c277df42 | 2321 | |
653099ff | 2322 | if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */ |
1de06328 | 2323 | scan_commit(pRExC_state, data, minlenp); /* Cannot merge strings after this. */ |
653099ff | 2324 | if (flags & SCF_DO_STCLASS) |
830247a4 | 2325 | cl_init_zero(pRExC_state, &accum); |
a3621e74 | 2326 | |
c277df42 | 2327 | while (OP(scan) == code) { |
830247a4 | 2328 | I32 deltanext, minnext, f = 0, fake; |
653099ff | 2329 | struct regnode_charclass_class this_class; |
c277df42 IZ |
2330 | |
2331 | num++; | |
2332 | data_fake.flags = 0; | |
b81d288d | 2333 | if (data) { |
2c2d71f5 | 2334 | data_fake.whilem_c = data->whilem_c; |
cb434fcc IZ |
2335 | data_fake.last_closep = data->last_closep; |
2336 | } | |
2337 | else | |
2338 | data_fake.last_closep = &fake; | |
c277df42 IZ |
2339 | next = regnext(scan); |
2340 | scan = NEXTOPER(scan); | |
2341 | if (code != BRANCH) | |
2342 | scan = NEXTOPER(scan); | |
653099ff | 2343 | if (flags & SCF_DO_STCLASS) { |
830247a4 | 2344 | cl_init(pRExC_state, &this_class); |
653099ff GS |
2345 | data_fake.start_class = &this_class; |
2346 | f = SCF_DO_STCLASS_AND; | |
b81d288d | 2347 | } |
e1901655 IZ |
2348 | if (flags & SCF_WHILEM_VISITED_POS) |
2349 | f |= SCF_WHILEM_VISITED_POS; | |
a3621e74 | 2350 | |
653099ff | 2351 | /* we suppose the run is continuous, last=next...*/ |
1de06328 | 2352 | minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext, |
a3621e74 | 2353 | next, &data_fake, f,depth+1); |
b81d288d | 2354 | if (min1 > minnext) |
c277df42 IZ |
2355 | min1 = minnext; |
2356 | if (max1 < minnext + deltanext) | |
2357 | max1 = minnext + deltanext; | |
2358 | if (deltanext == I32_MAX) | |
aca2d497 | 2359 | is_inf = is_inf_internal = 1; |
c277df42 IZ |
2360 | scan = next; |
2361 | if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) | |
2362 | pars++; | |
3dab1dad YO |
2363 | if (data) { |
2364 | if (data_fake.flags & SF_HAS_EVAL) | |
07be1b83 | 2365 | data->flags |= SF_HAS_EVAL; |
2c2d71f5 | 2366 | data->whilem_c = data_fake.whilem_c; |
3dab1dad | 2367 | } |
653099ff | 2368 | if (flags & SCF_DO_STCLASS) |
830247a4 | 2369 | cl_or(pRExC_state, &accum, &this_class); |
b81d288d | 2370 | if (code == SUSPEND) |
c277df42 IZ |
2371 | break; |
2372 | } | |
2373 | if (code == IFTHEN && num < 2) /* Empty ELSE branch */ | |
2374 | min1 = 0; | |
2375 | if (flags & SCF_DO_SUBSTR) { | |
2376 | data->pos_min += min1; | |
2377 | data->pos_delta += max1 - min1; | |
2378 | if (max1 != min1 || is_inf) | |
2379 | data->longest = &(data->longest_float); | |
2380 | } | |
2381 | min += min1; | |
2382 | delta += max1 - min1; | |
653099ff | 2383 | if (flags & SCF_DO_STCLASS_OR) { |
830247a4 | 2384 | cl_or(pRExC_state, data->start_class, &accum); |
653099ff GS |
2385 | if (min1) { |
2386 | cl_and(data->start_class, &and_with); | |
2387 | flags &= ~SCF_DO_STCLASS; | |
2388 | } | |
2389 | } | |
2390 | else if (flags & SCF_DO_STCLASS_AND) { | |
de0c8cb8 GS |
2391 | if (min1) { |
2392 | cl_and(data->start_class, &accum); | |
653099ff | 2393 | flags &= ~SCF_DO_STCLASS; |
de0c8cb8 GS |
2394 | } |
2395 | else { | |
b81d288d | 2396 | /* Switch to OR mode: cache the old value of |
de0c8cb8 GS |
2397 | * data->start_class */ |
2398 | StructCopy(data->start_class, &and_with, | |
2399 | struct regnode_charclass_class); | |
2400 | flags &= ~SCF_DO_STCLASS_AND; | |
2401 | StructCopy(&accum, data->start_class, | |
2402 | struct regnode_charclass_class); | |
2403 | flags |= SCF_DO_STCLASS_OR; | |
2404 | data->start_class->flags |= ANYOF_EOS; | |
2405 | } | |
653099ff | 2406 | } |
a3621e74 | 2407 | |
786e8c11 | 2408 | if (PERL_ENABLE_TRIE_OPTIMISATION && OP( startbranch ) == BRANCH ) { |
a3621e74 YO |
2409 | /* demq. |
2410 | ||
2411 | Assuming this was/is a branch we are dealing with: 'scan' now | |
2412 | points at the item that follows the branch sequence, whatever | |
2413 | it is. We now start at the beginning of the sequence and look | |
2414 | for subsequences of | |
2415 | ||
786e8c11 YO |
2416 | BRANCH->EXACT=>x1 |
2417 | BRANCH->EXACT=>x2 | |
2418 | tail | |
a3621e74 YO |
2419 | |
2420 | which would be constructed from a pattern like /A|LIST|OF|WORDS/ | |
2421 | ||
2422 | If we can find such a subseqence we need to turn the first | |
2423 | element into a trie and then add the subsequent branch exact | |
2424 | strings to the trie. | |
2425 | ||
2426 | We have two cases | |
2427 | ||
786e8c11 | 2428 | 1. patterns where the whole set of branch can be converted. |
a3621e74 | 2429 | |
786e8c11 | 2430 | 2. patterns where only a subset can be converted. |
a3621e74 YO |
2431 | |
2432 | In case 1 we can replace the whole set with a single regop | |
2433 | for the trie. In case 2 we need to keep the start and end | |
2434 | branchs so | |
2435 | ||
2436 | 'BRANCH EXACT; BRANCH EXACT; BRANCH X' | |
2437 | becomes BRANCH TRIE; BRANCH X; | |
2438 | ||
786e8c11 YO |
2439 | There is an additional case, that being where there is a |
2440 | common prefix, which gets split out into an EXACT like node | |
2441 | preceding the TRIE node. | |
2442 | ||
2443 | If x(1..n)==tail then we can do a simple trie, if not we make | |
2444 | a "jump" trie, such that when we match the appropriate word | |
2445 | we "jump" to the appopriate tail node. Essentailly we turn | |
2446 | a nested if into a case structure of sorts. | |
a3621e74 YO |
2447 | |
2448 | */ | |
786e8c11 | 2449 | |
3dab1dad | 2450 | int made=0; |
0111c4fd RGS |
2451 | if (!re_trie_maxbuff) { |
2452 | re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1); | |
2453 | if (!SvIOK(re_trie_maxbuff)) | |
2454 | sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT); | |
2455 | } | |
786e8c11 | 2456 | if ( SvIV(re_trie_maxbuff)>=0 ) { |
a3621e74 YO |
2457 | regnode *cur; |
2458 | regnode *first = (regnode *)NULL; | |
2459 | regnode *last = (regnode *)NULL; | |
2460 | regnode *tail = scan; | |
2461 | U8 optype = 0; | |
2462 | U32 count=0; | |
2463 | ||
2464 | #ifdef DEBUGGING | |
c445ea15 | 2465 | SV * const mysv = sv_newmortal(); /* for dumping */ |
a3621e74 YO |
2466 | #endif |
2467 | /* var tail is used because there may be a TAIL | |
2468 | regop in the way. Ie, the exacts will point to the | |
2469 | thing following the TAIL, but the last branch will | |
2470 | point at the TAIL. So we advance tail. If we | |
2471 | have nested (?:) we may have to move through several | |
2472 | tails. | |
2473 | */ | |
2474 | ||
2475 | while ( OP( tail ) == TAIL ) { | |
2476 | /* this is the TAIL generated by (?:) */ | |
2477 | tail = regnext( tail ); | |
2478 | } | |
2479 | ||
3dab1dad | 2480 | |
a3621e74 | 2481 | DEBUG_OPTIMISE_r({ |
32fc9b6a | 2482 | regprop(RExC_rx, mysv, tail ); |
3dab1dad YO |
2483 | PerlIO_printf( Perl_debug_log, "%*s%s%s\n", |
2484 | (int)depth * 2 + 2, "", | |
2485 | "Looking for TRIE'able sequences. Tail node is: ", | |
2486 | SvPV_nolen_const( mysv ) | |
a3621e74 YO |
2487 | ); |
2488 | }); | |
3dab1dad | 2489 | |
a3621e74 YO |
2490 | /* |
2491 | ||
2492 | step through the branches, cur represents each | |
2493 | branch, noper is the first thing to be matched | |
2494 | as part of that branch and noper_next is the | |
2495 | regnext() of that node. if noper is an EXACT | |
2496 | and noper_next is the same as scan (our current | |
2497 | position in the regex) then the EXACT branch is | |
2498 | a possible optimization target. Once we have | |
2499 | two or more consequetive such branches we can | |
2500 | create a trie of the EXACT's contents and stich | |
2501 | it in place. If the sequence represents all of | |
2502 | the branches we eliminate the whole thing and | |
2503 | replace it with a single TRIE. If it is a | |
2504 | subsequence then we need to stitch it in. This | |
2505 | means the first branch has to remain, and needs | |
2506 | to be repointed at the item on the branch chain | |
2507 | following the last branch optimized. This could | |
2508 | be either a BRANCH, in which case the | |
2509 | subsequence is internal, or it could be the | |
2510 | item following the branch sequence in which | |
2511 | case the subsequence is at the end. | |
2512 | ||
2513 | */ | |
2514 | ||
2515 | /* dont use tail as the end marker for this traverse */ | |
2516 | for ( cur = startbranch ; cur != scan ; cur = regnext( cur ) ) { | |
aec46f14 | 2517 | regnode * const noper = NEXTOPER( cur ); |
be981c67 | 2518 | #if defined(DEBUGGING) || defined(NOJUMPTRIE) |
aec46f14 | 2519 | regnode * const noper_next = regnext( noper ); |
be981c67 | 2520 | #endif |
a3621e74 | 2521 | |
a3621e74 | 2522 | DEBUG_OPTIMISE_r({ |
32fc9b6a | 2523 | regprop(RExC_rx, mysv, cur); |
3dab1dad YO |
2524 | PerlIO_printf( Perl_debug_log, "%*s- %s (%d)", |
2525 | (int)depth * 2 + 2,"", SvPV_nolen_const( mysv ), REG_NODE_NUM(cur) ); | |
a3621e74 | 2526 | |
32fc9b6a | 2527 | regprop(RExC_rx, mysv, noper); |
a3621e74 | 2528 | PerlIO_printf( Perl_debug_log, " -> %s", |
cfd0369c | 2529 | SvPV_nolen_const(mysv)); |
a3621e74 YO |
2530 | |
2531 | if ( noper_next ) { | |
32fc9b6a | 2532 | regprop(RExC_rx, mysv, noper_next ); |
a3621e74 | 2533 | PerlIO_printf( Perl_debug_log,"\t=> %s\t", |
cfd0369c | 2534 | SvPV_nolen_const(mysv)); |
a3621e74 | 2535 | } |
3dab1dad YO |
2536 | PerlIO_printf( Perl_debug_log, "(First==%d,Last==%d,Cur==%d)\n", |
2537 | REG_NODE_NUM(first), REG_NODE_NUM(last), REG_NODE_NUM(cur) ); | |
a3621e74 | 2538 | }); |
3dab1dad YO |
2539 | if ( (((first && optype!=NOTHING) ? OP( noper ) == optype |
2540 | : PL_regkind[ OP( noper ) ] == EXACT ) | |
2541 | || OP(noper) == NOTHING ) | |
786e8c11 YO |
2542 | #ifdef NOJUMPTRIE |
2543 | && noper_next == tail | |
2544 | #endif | |
2545 | && count < U16_MAX) | |
a3621e74 YO |
2546 | { |
2547 | count++; | |
3dab1dad YO |
2548 | if ( !first || optype == NOTHING ) { |
2549 | if (!first) first = cur; | |
a3621e74 YO |
2550 | optype = OP( noper ); |
2551 | } else { | |
a3621e74 | 2552 | last = cur; |
a3621e74 YO |
2553 | } |
2554 | } else { | |
2555 | if ( last ) { | |
786e8c11 YO |
2556 | make_trie( pRExC_state, |
2557 | startbranch, first, cur, tail, count, | |
2558 | optype, depth+1 ); | |
a3621e74 | 2559 | } |
3dab1dad | 2560 | if ( PL_regkind[ OP( noper ) ] == EXACT |
786e8c11 YO |
2561 | #ifdef NOJUMPTRIE |
2562 | && noper_next == tail | |
2563 | #endif | |
2564 | ){ | |
a3621e74 YO |
2565 | count = 1; |
2566 | first = cur; | |
2567 | optype = OP( noper ); | |
2568 | } else { | |
2569 | count = 0; | |
2570 | first = NULL; | |
2571 | optype = 0; | |
2572 | } | |
2573 | last = NULL; | |
2574 | } | |
2575 | } | |
2576 | DEBUG_OPTIMISE_r({ | |
32fc9b6a | 2577 | regprop(RExC_rx, mysv, cur); |
a3621e74 | 2578 | PerlIO_printf( Perl_debug_log, |
3dab1dad YO |
2579 | "%*s- %s (%d) <SCAN FINISHED>\n", (int)depth * 2 + 2, |
2580 | "", SvPV_nolen_const( mysv ),REG_NODE_NUM(cur)); | |
a3621e74 YO |
2581 | |
2582 | }); | |
2583 | if ( last ) { | |
786e8c11 | 2584 | made= make_trie( pRExC_state, startbranch, first, scan, tail, count, optype, depth+1 ); |
3dab1dad | 2585 | #ifdef TRIE_STUDY_OPT |
786e8c11 YO |
2586 | if ( ((made == MADE_EXACT_TRIE && |
2587 | startbranch == first) | |
2588 | || ( first_non_open == first )) && | |
2589 | depth==0 ) | |
2590 | flags |= SCF_TRIE_RESTUDY; | |
3dab1dad | 2591 | #endif |
07be1b83 | 2592 | } |
a3621e74 | 2593 | } |
3dab1dad YO |
2594 | |
2595 | } /* do trie */ | |
786e8c11 | 2596 | |
a0ed51b3 | 2597 | } |
a3621e74 | 2598 | else if ( code == BRANCHJ ) { /* single branch is optimized. */ |
c277df42 | 2599 | scan = NEXTOPER(NEXTOPER(scan)); |
a3621e74 | 2600 | } else /* single branch is optimized. */ |
c277df42 IZ |
2601 | scan = NEXTOPER(scan); |
2602 | continue; | |
a0ed51b3 LW |
2603 | } |
2604 | else if (OP(scan) == EXACT) { | |
cd439c50 | 2605 | I32 l = STR_LEN(scan); |
c445ea15 | 2606 | UV uc; |
a0ed51b3 | 2607 | if (UTF) { |
a3b680e6 | 2608 | const U8 * const s = (U8*)STRING(scan); |
1aa99e6b | 2609 | l = utf8_length(s, s + l); |
9041c2e3 | 2610 | uc = utf8_to_uvchr(s, NULL); |
c445ea15 AL |
2611 | } else { |
2612 | uc = *((U8*)STRING(scan)); | |
a0ed51b3 LW |
2613 | } |
2614 | min += l; | |
c277df42 | 2615 | if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */ |
c277df42 IZ |
2616 | /* The code below prefers earlier match for fixed |
2617 | offset, later match for variable offset. */ | |
2618 | if (data->last_end == -1) { /* Update the start info. */ | |
2619 | data->last_start_min = data->pos_min; | |
2620 | data->last_start_max = is_inf | |
b81d288d | 2621 | ? I32_MAX : data->pos_min + data->pos_delta; |
c277df42 | 2622 | } |
cd439c50 | 2623 | sv_catpvn(data->last_found, STRING(scan), STR_LEN(scan)); |
45f47268 NC |
2624 | if (UTF) |
2625 | SvUTF8_on(data->last_found); | |
0eda9292 | 2626 | { |
9a957fbc | 2627 | SV * const sv = data->last_found; |
a28509cc | 2628 | MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? |
0eda9292 JH |
2629 | mg_find(sv, PERL_MAGIC_utf8) : NULL; |
2630 | if (mg && mg->mg_len >= 0) | |
5e43f467 JH |
2631 | mg->mg_len += utf8_length((U8*)STRING(scan), |
2632 | (U8*)STRING(scan)+STR_LEN(scan)); | |
0eda9292 | 2633 | } |
c277df42 IZ |
2634 | data->last_end = data->pos_min + l; |
2635 | data->pos_min += l; /* As in the first entry. */ | |
2636 | data->flags &= ~SF_BEFORE_EOL; | |
2637 | } | |
653099ff GS |
2638 | if (flags & SCF_DO_STCLASS_AND) { |
2639 | /* Check whether it is compatible with what we know already! */ | |
2640 | int compat = 1; | |
2641 | ||
1aa99e6b | 2642 | if (uc >= 0x100 || |
516a5887 | 2643 | (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE)) |
1aa99e6b | 2644 | && !ANYOF_BITMAP_TEST(data->start_class, uc) |
653099ff | 2645 | && (!(data->start_class->flags & ANYOF_FOLD) |
1aa99e6b | 2646 | || !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc]))) |
516a5887 | 2647 | ) |
653099ff GS |
2648 | compat = 0; |
2649 | ANYOF_CLASS_ZERO(data->start_class); | |
2650 | ANYOF_BITMAP_ZERO(data->start_class); | |
2651 | if (compat) | |
1aa99e6b | 2652 | ANYOF_BITMAP_SET(data->start_class, uc); |
653099ff | 2653 | data->start_class->flags &= ~ANYOF_EOS; |
9b877dbb IH |
2654 | if (uc < 0x100) |
2655 | data->start_class->flags &= ~ANYOF_UNICODE_ALL; | |
653099ff GS |
2656 | } |
2657 | else if (flags & SCF_DO_STCLASS_OR) { | |
2658 | /* false positive possible if the class is case-folded */ | |
1aa99e6b | 2659 | if (uc < 0x100) |
9b877dbb IH |
2660 | ANYOF_BITMAP_SET(data->start_class, uc); |
2661 | else | |
2662 | data->start_class->flags |= ANYOF_UNICODE_ALL; | |
653099ff GS |
2663 | data->start_class->flags &= ~ANYOF_EOS; |
2664 | cl_and(data->start_class, &and_with); | |
2665 | } | |
2666 | flags &= ~SCF_DO_STCLASS; | |
a0ed51b3 | 2667 | } |
3dab1dad | 2668 | else if (PL_regkind[OP(scan)] == EXACT) { /* But OP != EXACT! */ |
cd439c50 | 2669 | I32 l = STR_LEN(scan); |
1aa99e6b | 2670 | UV uc = *((U8*)STRING(scan)); |
653099ff GS |
2671 | |
2672 | /* Search for fixed substrings supports EXACT only. */ | |
ecaa9b9c NC |
2673 | if (flags & SCF_DO_SUBSTR) { |
2674 | assert(data); | |
1de06328 | 2675 | scan_commit(pRExC_state, data, minlenp); |
ecaa9b9c | 2676 | } |
a0ed51b3 | 2677 | if (UTF) { |
6136c704 | 2678 | const U8 * const s = (U8 *)STRING(scan); |
1aa99e6b | 2679 | l = utf8_length(s, s + l); |
9041c2e3 | 2680 | uc = utf8_to_uvchr(s, NULL); |
a0ed51b3 LW |
2681 | } |
2682 | min += l; | |
ecaa9b9c | 2683 | if (flags & SCF_DO_SUBSTR) |
a0ed51b3 | 2684 | data->pos_min += l; |
653099ff GS |
2685 | if (flags & SCF_DO_STCLASS_AND) { |
2686 | /* Check whether it is compatible with what we know already! */ | |
2687 | int compat = 1; | |
2688 | ||
1aa99e6b | 2689 | if (uc >= 0x100 || |
516a5887 | 2690 | (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE)) |
1aa99e6b | 2691 | && !ANYOF_BITMAP_TEST(data->start_class, uc) |
516a5887 | 2692 | && !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc]))) |
653099ff GS |
2693 | compat = 0; |
2694 | ANYOF_CLASS_ZERO(data->start_class); | |
2695 | ANYOF_BITMAP_ZERO(data->start_class); | |
2696 | if (compat) { | |
1aa99e6b | 2697 | ANYOF_BITMAP_SET(data->start_class, uc); |
653099ff GS |
2698 | data->start_class->flags &= ~ANYOF_EOS; |
2699 | data->start_class->flags |= ANYOF_FOLD; | |
2700 | if (OP(scan) == EXACTFL) | |
2701 | data->start_class->flags |= ANYOF_LOCALE; | |
2702 | } | |
2703 | } | |
2704 | else if (flags & SCF_DO_STCLASS_OR) { | |
2705 | if (data->start_class->flags & ANYOF_FOLD) { | |
2706 | /* false positive possible if the class is case-folded. | |
2707 | Assume that the locale settings are the same... */ | |
1aa99e6b IH |
2708 | if (uc < 0x100) |
2709 | ANYOF_BITMAP_SET(data->start_class, uc); | |
653099ff GS |
2710 | data->start_class->flags &= ~ANYOF_EOS; |
2711 | } | |
2712 | cl_and(data->start_class, &and_with); | |
2713 | } | |
2714 | flags &= ~SCF_DO_STCLASS; | |
a0ed51b3 | 2715 | } |
bfed75c6 | 2716 | else if (strchr((const char*)PL_varies,OP(scan))) { |
9c5ffd7c | 2717 | I32 mincount, maxcount, minnext, deltanext, fl = 0; |
aa7a4b56 | 2718 | I32 f = flags, pos_before = 0; |
d4c19fe8 | 2719 | regnode * const oscan = scan; |
653099ff GS |
2720 | struct regnode_charclass_class this_class; |
2721 | struct regnode_charclass_class *oclass = NULL; | |
727f22e3 | 2722 | I32 next_is_eval = 0; |
653099ff | 2723 | |
3dab1dad | 2724 | switch (PL_regkind[OP(scan)]) { |
653099ff | 2725 | case WHILEM: /* End of (?:...)* . */ |
c277df42 IZ |
2726 | scan = NEXTOPER(scan); |
2727 | goto finish; | |
2728 | case PLUS: | |
653099ff | 2729 | if (flags & (SCF_DO_SUBSTR | SCF_DO_STCLASS)) { |
c277df42 | 2730 | next = NEXTOPER(scan); |
653099ff | 2731 | if (OP(next) == EXACT || (flags & SCF_DO_STCLASS)) { |
b81d288d AB |
2732 | mincount = 1; |
2733 | maxcount = REG_INFTY; | |
c277df42 IZ |
2734 | next = regnext(scan); |
2735 | scan = NEXTOPER(scan); | |
2736 | goto do_curly; | |
2737 | } | |
2738 | } | |
2739 | if (flags & SCF_DO_SUBSTR) | |
2740 | data->pos_min++; | |
2741 | min++; | |
2742 | /* Fall through. */ | |
2743 | case STAR: | |
653099ff GS |
2744 | if (flags & SCF_DO_STCLASS) { |
2745 | mincount = 0; | |
b81d288d | 2746 | maxcount = REG_INFTY; |
653099ff GS |
2747 | next = regnext(scan); |
2748 | scan = NEXTOPER(scan); | |
2749 | goto do_curly; | |
2750 | } | |
b81d288d | 2751 | is_inf = is_inf_internal = 1; |
c277df42 IZ |
2752 | scan = regnext(scan); |
2753 | if (flags & SCF_DO_SUBSTR) { | |
1de06328 | 2754 | scan_commit(pRExC_state, data, minlenp); /* Cannot extend fixed substrings */ |
c277df42 IZ |
2755 | data->longest = &(data->longest_float); |
2756 | } | |
2757 | goto optimize_curly_tail; | |
2758 | case CURLY: | |
b81d288d | 2759 | mincount = ARG1(scan); |
c277df42 IZ |
2760 | maxcount = ARG2(scan); |
2761 | next = regnext(scan); | |
cb434fcc IZ |
2762 | if (OP(scan) == CURLYX) { |
2763 | I32 lp = (data ? *(data->last_closep) : 0); | |
786e8c11 | 2764 | scan->flags = ((lp <= (I32)U8_MAX) ? (U8)lp : U8_MAX); |
cb434fcc | 2765 | } |
c277df42 | 2766 | scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS; |
727f22e3 | 2767 | next_is_eval = (OP(scan) == EVAL); |
c277df42 IZ |
2768 | do_curly: |
2769 | if (flags & SCF_DO_SUBSTR) { | |
1de06328 | 2770 | if (mincount == 0) scan_commit(pRExC_state,data,minlenp); /* Cannot extend fixed substrings */ |
c277df42 IZ |
2771 | pos_before = data->pos_min; |
2772 | } | |
2773 | if (data) { | |
2774 | fl = data->flags; | |
2775 | data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL); | |
2776 | if (is_inf) | |
2777 | data->flags |= SF_IS_INF; | |
2778 | } | |
653099ff | 2779 | if (flags & SCF_DO_STCLASS) { |
830247a4 | 2780 | cl_init(pRExC_state, &this_class); |
653099ff GS |
2781 | oclass = data->start_class; |
2782 | data->start_class = &this_class; | |
2783 | f |= SCF_DO_STCLASS_AND; | |
2784 | f &= ~SCF_DO_STCLASS_OR; | |
2785 | } | |
e1901655 IZ |
2786 | /* These are the cases when once a subexpression |
2787 | fails at a particular position, it cannot succeed | |
2788 | even after backtracking at the enclosing scope. | |
b81d288d | 2789 | |
e1901655 IZ |
2790 | XXXX what if minimal match and we are at the |
2791 | initial run of {n,m}? */ | |
2792 | if ((mincount != maxcount - 1) && (maxcount != REG_INFTY)) | |
2793 | f &= ~SCF_WHILEM_VISITED_POS; | |
653099ff | 2794 | |
c277df42 | 2795 | /* This will finish on WHILEM, setting scan, or on NULL: */ |
1de06328 | 2796 | minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext, last, data, |
a3621e74 YO |
2797 | (mincount == 0 |
2798 | ? (f & ~SCF_DO_SUBSTR) : f),depth+1); | |
653099ff GS |
2799 | |
2800 | if (flags & SCF_DO_STCLASS) | |
2801 | data->start_class = oclass; | |
2802 | if (mincount == 0 || minnext == 0) { | |
2803 | if (flags & SCF_DO_STCLASS_OR) { | |
830247a4 | 2804 | cl_or(pRExC_state, data->start_class, &this_class); |
653099ff GS |
2805 | } |
2806 | else if (flags & SCF_DO_STCLASS_AND) { | |
b81d288d | 2807 | /* Switch to OR mode: cache the old value of |
653099ff GS |
2808 | * data->start_class */ |
2809 | StructCopy(data->start_class, &and_with, | |
2810 | struct regnode_charclass_class); | |
2811 | flags &= ~SCF_DO_STCLASS_AND; | |
2812 | StructCopy(&this_class, data->start_class, | |
2813 | struct regnode_charclass_class); | |
2814 | flags |= SCF_DO_STCLASS_OR; | |
2815 | data->start_class->flags |= ANYOF_EOS; | |
2816 | } | |
2817 | } else { /* Non-zero len */ | |
2818 | if (flags & SCF_DO_STCLASS_OR) { | |
830247a4 | 2819 | cl_or(pRExC_state, data->start_class, &this_class); |
653099ff GS |
2820 | cl_and(data->start_class, &and_with); |
2821 | } | |
2822 | else if (flags & SCF_DO_STCLASS_AND) | |
2823 | cl_and(data->start_class, &this_class); | |
2824 | flags &= ~SCF_DO_STCLASS; | |
2825 | } | |
c277df42 IZ |
2826 | if (!scan) /* It was not CURLYX, but CURLY. */ |
2827 | scan = next; | |
041457d9 DM |
2828 | if ( /* ? quantifier ok, except for (?{ ... }) */ |
2829 | (next_is_eval || !(mincount == 0 && maxcount == 1)) | |
84037bb0 | 2830 | && (minnext == 0) && (deltanext == 0) |
99799961 | 2831 | && data && !(data->flags & (SF_HAS_PAR|SF_IN_PAR)) |
041457d9 DM |
2832 | && maxcount <= REG_INFTY/3 /* Complement check for big count */ |
2833 | && ckWARN(WARN_REGEXP)) | |
b45f050a | 2834 | { |
830247a4 | 2835 | vWARN(RExC_parse, |
b45f050a JF |
2836 | "Quantifier unexpected on zero-length expression"); |
2837 | } | |
2838 | ||
c277df42 | 2839 | min += minnext * mincount; |
b81d288d | 2840 | is_inf_internal |= ((maxcount == REG_INFTY |
155aba94 GS |
2841 | && (minnext + deltanext) > 0) |
2842 | || deltanext == I32_MAX); | |
aca2d497 | 2843 | is_inf |= is_inf_internal; |
c277df42 IZ |
2844 | delta += (minnext + deltanext) * maxcount - minnext * mincount; |
2845 | ||
2846 | /* Try powerful optimization CURLYX => CURLYN. */ | |
b81d288d | 2847 | if ( OP(oscan) == CURLYX && data |
c277df42 IZ |
2848 | && data->flags & SF_IN_PAR |
2849 | && !(data->flags & SF_HAS_EVAL) | |
2850 | && !deltanext && minnext == 1 ) { | |
2851 | /* Try to optimize to CURLYN. */ | |
2852 | regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; | |
d4c19fe8 | 2853 | regnode * const nxt1 = nxt; |
497b47a8 JH |
2854 | #ifdef DEBUGGING |
2855 | regnode *nxt2; | |
2856 | #endif | |
c277df42 IZ |
2857 | |
2858 | /* Skip open. */ | |
2859 | nxt = regnext(nxt); | |
bfed75c6 | 2860 | if (!strchr((const char*)PL_simple,OP(nxt)) |
3dab1dad | 2861 | && !(PL_regkind[OP(nxt)] == EXACT |
b81d288d | 2862 | && STR_LEN(nxt) == 1)) |
c277df42 | 2863 | goto nogo; |
497b47a8 | 2864 | #ifdef DEBUGGING |
c277df42 | 2865 | nxt2 = nxt; |
497b47a8 | 2866 | #endif |
c277df42 | 2867 | nxt = regnext(nxt); |
b81d288d | 2868 | if (OP(nxt) != CLOSE) |
c277df42 IZ |
2869 | goto nogo; |
2870 | /* Now we know that nxt2 is the only contents: */ | |
eb160463 | 2871 | oscan->flags = (U8)ARG(nxt); |
c277df42 IZ |
2872 | OP(oscan) = CURLYN; |
2873 | OP(nxt1) = NOTHING; /* was OPEN. */ | |
2874 | #ifdef DEBUGGING | |
2875 | OP(nxt1 + 1) = OPTIMIZED; /* was count. */ | |
2876 | NEXT_OFF(nxt1+ 1) = 0; /* just for consistancy. */ | |
2877 | NEXT_OFF(nxt2) = 0; /* just for consistancy with CURLY. */ | |
2878 | OP(nxt) = OPTIMIZED; /* was CLOSE. */ | |
2879 | OP(nxt + 1) = OPTIMIZED; /* was count. */ | |
2880 | NEXT_OFF(nxt+ 1) = 0; /* just for consistancy. */ | |
b81d288d | 2881 | #endif |
c277df42 | 2882 | } |
c277df42 IZ |
2883 | nogo: |
2884 | ||
2885 | /* Try optimization CURLYX => CURLYM. */ | |
b81d288d | 2886 | if ( OP(oscan) == CURLYX && data |
c277df42 | 2887 | && !(data->flags & SF_HAS_PAR) |
c277df42 | 2888 | && !(data->flags & SF_HAS_EVAL) |
0e788c72 HS |
2889 | && !deltanext /* atom is fixed width */ |
2890 | && minnext != 0 /* CURLYM can't handle zero width */ | |
2891 | ) { | |
c277df42 IZ |
2892 | /* XXXX How to optimize if data == 0? */ |
2893 | /* Optimize to a simpler form. */ | |
2894 | regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN */ | |
2895 | regnode *nxt2; | |
2896 | ||
2897 | OP(oscan) = CURLYM; | |
2898 | while ( (nxt2 = regnext(nxt)) /* skip over embedded stuff*/ | |
b81d288d | 2899 | && (OP(nxt2) != WHILEM)) |
c277df42 IZ |
2900 | nxt = nxt2; |
2901 | OP(nxt2) = SUCCEED; /* Whas WHILEM */ | |
c277df42 IZ |
2902 | /* Need to optimize away parenths. */ |
2903 | if (data->flags & SF_IN_PAR) { | |
2904 | /* Set the parenth number. */ | |
2905 | regnode *nxt1 = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN*/ | |
2906 | ||
b81d288d | 2907 | if (OP(nxt) != CLOSE) |
b45f050a | 2908 | FAIL("Panic opt close"); |
eb160463 | 2909 | oscan->flags = (U8)ARG(nxt); |
c277df42 IZ |
2910 | OP(nxt1) = OPTIMIZED; /* was OPEN. */ |
2911 | OP(nxt) = OPTIMIZED; /* was CLOSE. */ | |
2912 | #ifdef DEBUGGING | |
2913 | OP(nxt1 + 1) = OPTIMIZED; /* was count. */ | |
2914 | OP(nxt + 1) = OPTIMIZED; /* was count. */ | |
2915 | NEXT_OFF(nxt1 + 1) = 0; /* just for consistancy. */ | |
2916 | NEXT_OFF(nxt + 1) = 0; /* just for consistancy. */ | |
b81d288d | 2917 | #endif |
c277df42 IZ |
2918 | #if 0 |
2919 | while ( nxt1 && (OP(nxt1) != WHILEM)) { | |
2920 | regnode *nnxt = regnext(nxt1); | |
b81d288d | 2921 | |
c277df42 IZ |
2922 | if (nnxt == nxt) { |
2923 | if (reg_off_by_arg[OP(nxt1)]) | |
2924 | ARG_SET(nxt1, nxt2 - nxt1); | |
2925 | else if (nxt2 - nxt1 < U16_MAX) | |
2926 | NEXT_OFF(nxt1) = nxt2 - nxt1; | |
2927 | else | |
2928 | OP(nxt) = NOTHING; /* Cannot beautify */ | |
2929 | } | |
2930 | nxt1 = nnxt; | |
2931 | } | |
2932 | #endif | |
2933 | /* Optimize again: */ | |
1de06328 | 2934 | study_chunk(pRExC_state, &nxt1, minlenp, &deltanext, nxt, |
a3621e74 | 2935 | NULL, 0,depth+1); |
a0ed51b3 LW |
2936 | } |
2937 | else | |
c277df42 | 2938 | oscan->flags = 0; |
c277df42 | 2939 | } |
e1901655 IZ |
2940 | else if ((OP(oscan) == CURLYX) |
2941 | && (flags & SCF_WHILEM_VISITED_POS) | |
2942 | /* See the comment on a similar expression above. | |
2943 | However, this time it not a subexpression | |
2944 | we care about, but the expression itself. */ | |
2945 | && (maxcount == REG_INFTY) | |
2946 | && data && ++data->whilem_c < 16) { | |
2947 | /* This stays as CURLYX, we can put the count/of pair. */ | |
2c2d71f5 JH |
2948 | /* Find WHILEM (as in regexec.c) */ |
2949 | regnode *nxt = oscan + NEXT_OFF(oscan); | |
2950 | ||
2951 | if (OP(PREVOPER(nxt)) == NOTHING) /* LONGJMP */ | |
2952 | nxt += ARG(nxt); | |
eb160463 GS |
2953 | PREVOPER(nxt)->flags = (U8)(data->whilem_c |
2954 | | (RExC_whilem_seen << 4)); /* On WHILEM */ | |
2c2d71f5 | 2955 | } |
b81d288d | 2956 | if (data && fl & (SF_HAS_PAR|SF_IN_PAR)) |
c277df42 IZ |
2957 | pars++; |
2958 | if (flags & SCF_DO_SUBSTR) { | |
c445ea15 | 2959 | SV *last_str = NULL; |
c277df42 IZ |
2960 | int counted = mincount != 0; |
2961 | ||
2962 | if (data->last_end > 0 && mincount != 0) { /* Ends with a string. */ | |
5d1c421c JH |
2963 | #if defined(SPARC64_GCC_WORKAROUND) |
2964 | I32 b = 0; | |
2965 | STRLEN l = 0; | |
cfd0369c | 2966 | const char *s = NULL; |
5d1c421c JH |
2967 | I32 old = 0; |
2968 | ||
2969 | if (pos_before >= data->last_start_min) | |
2970 | b = pos_before; | |
2971 | else | |
2972 | b = data->last_start_min; | |
2973 | ||
2974 | l = 0; | |
cfd0369c | 2975 | s = SvPV_const(data->last_found, l); |
5d1c421c JH |
2976 | old = b - data->last_start_min; |
2977 | ||
2978 | #else | |
b81d288d | 2979 | I32 b = pos_before >= data->last_start_min |
c277df42 IZ |
2980 | ? pos_before : data->last_start_min; |
2981 | STRLEN l; | |
d4c19fe8 | 2982 | const char * const s = SvPV_const(data->last_found, l); |
a0ed51b3 | 2983 | I32 old = b - data->last_start_min; |
5d1c421c | 2984 | #endif |
a0ed51b3 LW |
2985 | |
2986 | if (UTF) | |
2987 | old = utf8_hop((U8*)s, old) - (U8*)s; | |
c277df42 | 2988 | |
a0ed51b3 | 2989 | l -= old; |
c277df42 | 2990 | /* Get the added string: */ |
79cb57f6 | 2991 | last_str = newSVpvn(s + old, l); |
0e933229 IH |
2992 | if (UTF) |
2993 | SvUTF8_on(last_str); | |
c277df42 IZ |
2994 | if (deltanext == 0 && pos_before == b) { |
2995 | /* What was added is a constant string */ | |
2996 | if (mincount > 1) { | |
2997 | SvGROW(last_str, (mincount * l) + 1); | |
b81d288d | 2998 | repeatcpy(SvPVX(last_str) + l, |
3f7c398e | 2999 | SvPVX_const(last_str), l, mincount - 1); |
b162af07 | 3000 | SvCUR_set(last_str, SvCUR(last_str) * mincount); |
c277df42 | 3001 | /* Add additional parts. */ |
b81d288d | 3002 | SvCUR_set(data->last_found, |
c277df42 IZ |
3003 | SvCUR(data->last_found) - l); |
3004 | sv_catsv(data->last_found, last_str); | |
0eda9292 JH |
3005 | { |
3006 | SV * sv = data->last_found; | |
3007 | MAGIC *mg = | |
3008 | SvUTF8(sv) && SvMAGICAL(sv) ? | |
3009 | mg_find(sv, PERL_MAGIC_utf8) : NULL; | |
3010 | if (mg && mg->mg_len >= 0) | |
3011 | mg->mg_len += CHR_SVLEN(last_str); | |
3012 | } | |
c277df42 IZ |
3013 | data->last_end += l * (mincount - 1); |
3014 | } | |
2a8d9689 HS |
3015 | } else { |
3016 | /* start offset must point into the last copy */ | |
3017 | data->last_start_min += minnext * (mincount - 1); | |
c152dc43 HS |
3018 | data->last_start_max += is_inf ? I32_MAX |
3019 | : (maxcount - 1) * (minnext + data->pos_delta); | |
c277df42 IZ |
3020 | } |
3021 | } | |
3022 | /* It is counted once already... */ | |
3023 | data->pos_min += minnext * (mincount - counted); | |
3024 | data->pos_delta += - counted * deltanext + | |
3025 | (minnext + deltanext) * maxcount - minnext * mincount; | |
3026 | if (mincount != maxcount) { | |
653099ff GS |
3027 | /* Cannot extend fixed substrings found inside |
3028 | the group. */ | |
1de06328 | 3029 | scan_commit(pRExC_state,data,minlenp); |
c277df42 | 3030 | if (mincount && last_str) { |
d4c19fe8 AL |
3031 | SV * const sv = data->last_found; |
3032 | MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? | |
45f47268 NC |
3033 | mg_find(sv, PERL_MAGIC_utf8) : NULL; |
3034 | ||
3035 | if (mg) | |
3036 | mg->mg_len = -1; | |
3037 | sv_setsv(sv, last_str); | |
c277df42 | 3038 | data->last_end = data->pos_min; |
b81d288d | 3039 | data->last_start_min = |
a0ed51b3 | 3040 | data->pos_min - CHR_SVLEN(last_str); |
b81d288d AB |
3041 | data->last_start_max = is_inf |
3042 | ? I32_MAX | |
c277df42 | 3043 | : data->pos_min + data->pos_delta |
a0ed51b3 | 3044 | - CHR_SVLEN(last_str); |
c277df42 IZ |
3045 | } |
3046 | data->longest = &(data->longest_float); | |
3047 | } | |
aca2d497 | 3048 | SvREFCNT_dec(last_str); |
c277df42 | 3049 | } |
405ff068 | 3050 | if (data && (fl & SF_HAS_EVAL)) |
c277df42 IZ |
3051 | data->flags |= SF_HAS_EVAL; |
3052 | optimize_curly_tail: | |
c277df42 | 3053 | if (OP(oscan) != CURLYX) { |
3dab1dad | 3054 | while (PL_regkind[OP(next = regnext(oscan))] == NOTHING |
c277df42 IZ |
3055 | && NEXT_OFF(next)) |
3056 | NEXT_OFF(oscan) += NEXT_OFF(next); | |
3057 | } | |
c277df42 | 3058 | continue; |
653099ff | 3059 | default: /* REF and CLUMP only? */ |
c277df42 | 3060 | if (flags & SCF_DO_SUBSTR) { |
1de06328 | 3061 | scan_commit(pRExC_state,data,minlenp); /* Cannot expect anything... */ |
c277df42 IZ |
3062 | data->longest = &(data->longest_float); |
3063 | } | |
aca2d497 | 3064 | is_inf = is_inf_internal = 1; |
653099ff | 3065 | if (flags & SCF_DO_STCLASS_OR) |
830247a4 | 3066 | cl_anything(pRExC_state, data->start_class); |
653099ff | 3067 | flags &= ~SCF_DO_STCLASS; |
c277df42 IZ |
3068 | break; |
3069 | } | |
a0ed51b3 | 3070 | } |
bfed75c6 | 3071 | else if (strchr((const char*)PL_simple,OP(scan))) { |
9c5ffd7c | 3072 | int value = 0; |
653099ff | 3073 | |
c277df42 | 3074 | if (flags & SCF_DO_SUBSTR) { |
1de06328 | 3075 | scan_commit(pRExC_state,data,minlenp); |
c277df42 IZ |
3076 | data->pos_min++; |
3077 | } | |
3078 | min++; | |
653099ff GS |
3079 | if (flags & SCF_DO_STCLASS) { |
3080 | data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */ | |
3081 | ||
3082 | /* Some of the logic below assumes that switching | |
3083 | locale on will only add false positives. */ | |
3dab1dad | 3084 | switch (PL_regkind[OP(scan)]) { |
653099ff | 3085 | case SANY: |
653099ff GS |
3086 | default: |
3087 | do_default: | |
3088 | /* Perl_croak(aTHX_ "panic: unexpected simple REx opcode %d", OP(scan)); */ | |
3089 | if (flags & SCF_DO_STCLASS_OR) /* Allow everything */ | |
830247a4 | 3090 | cl_anything(pRExC_state, data->start_class); |
653099ff GS |
3091 | break; |
3092 | case REG_ANY: | |
3093 | if (OP(scan) == SANY) | |
3094 | goto do_default; | |
3095 | if (flags & SCF_DO_STCLASS_OR) { /* Everything but \n */ | |
3096 | value = (ANYOF_BITMAP_TEST(data->start_class,'\n') | |
3097 | || (data->start_class->flags & ANYOF_CLASS)); | |
830247a4 | 3098 | cl_anything(pRExC_state, data->start_class); |
653099ff GS |
3099 | } |
3100 | if (flags & SCF_DO_STCLASS_AND || !value) | |
3101 | ANYOF_BITMAP_CLEAR(data->start_class,'\n'); | |
3102 | break; | |
3103 | case ANYOF: | |
3104 | if (flags & SCF_DO_STCLASS_AND) | |
3105 | cl_and(data->start_class, | |
3106 | (struct regnode_charclass_class*)scan); | |
3107 | else | |
830247a4 | 3108 | cl_or(pRExC_state, data->start_class, |
653099ff GS |
3109 | (struct regnode_charclass_class*)scan); |
3110 | break; | |
3111 | case ALNUM: | |
3112 | if (flags & SCF_DO_STCLASS_AND) { | |
3113 | if (!(data->start_class->flags & ANYOF_LOCALE)) { | |
3114 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM); | |
3115 | for (value = 0; value < 256; value++) | |
3116 | if (!isALNUM(value)) | |
3117 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3118 | } | |
3119 | } | |
3120 | else { | |
3121 | if (data->start_class->flags & ANYOF_LOCALE) | |
3122 | ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM); | |
3123 | else { | |
3124 | for (value = 0; value < 256; value++) | |
3125 | if (isALNUM(value)) | |
b81d288d | 3126 | ANYOF_BITMAP_SET(data->start_class, value); |
653099ff GS |
3127 | } |
3128 | } | |
3129 | break; | |
3130 | case ALNUML: | |
3131 | if (flags & SCF_DO_STCLASS_AND) { | |
3132 | if (data->start_class->flags & ANYOF_LOCALE) | |
3133 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM); | |
3134 | } | |
3135 | else { | |
3136 | ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM); | |
3137 | data->start_class->flags |= ANYOF_LOCALE; | |
3138 | } | |
3139 | break; | |
3140 | case NALNUM: | |
3141 | if (flags & SCF_DO_STCLASS_AND) { | |
3142 | if (!(data->start_class->flags & ANYOF_LOCALE)) { | |
3143 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM); | |
3144 | for (value = 0; value < 256; value++) | |
3145 | if (isALNUM(value)) | |
3146 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3147 | } | |
3148 | } | |
3149 | else { | |
3150 | if (data->start_class->flags & ANYOF_LOCALE) | |
3151 | ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM); | |
3152 | else { | |
3153 | for (value = 0; value < 256; value++) | |
3154 | if (!isALNUM(value)) | |
b81d288d | 3155 | ANYOF_BITMAP_SET(data->start_class, value); |
653099ff GS |
3156 | } |
3157 | } | |
3158 | break; | |
3159 | case NALNUML: | |
3160 | if (flags & SCF_DO_STCLASS_AND) { | |
3161 | if (data->start_class->flags & ANYOF_LOCALE) | |
3162 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM); | |
3163 | } | |
3164 | else { | |
3165 | data->start_class->flags |= ANYOF_LOCALE; | |
3166 | ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM); | |
3167 | } | |
3168 | break; | |
3169 | case SPACE: | |
3170 | if (flags & SCF_DO_STCLASS_AND) { | |
3171 | if (!(data->start_class->flags & ANYOF_LOCALE)) { | |
3172 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE); | |
3173 | for (value = 0; value < 256; value++) | |
3174 | if (!isSPACE(value)) | |
3175 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3176 | } | |
3177 | } | |
3178 | else { | |
3179 | if (data->start_class->flags & ANYOF_LOCALE) | |
3180 | ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE); | |
3181 | else { | |
3182 | for (value = 0; value < 256; value++) | |
3183 | if (isSPACE(value)) | |
b81d288d | 3184 | ANYOF_BITMAP_SET(data->start_class, value); |
653099ff GS |
3185 | } |
3186 | } | |
3187 | break; | |
3188 | case SPACEL: | |
3189 | if (flags & SCF_DO_STCLASS_AND) { | |
3190 | if (data->start_class->flags & ANYOF_LOCALE) | |
3191 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE); | |
3192 | } | |
3193 | else { | |
3194 | data->start_class->flags |= ANYOF_LOCALE; | |
3195 | ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE); | |
3196 | } | |
3197 | break; | |
3198 | case NSPACE: | |
3199 | if (flags & SCF_DO_STCLASS_AND) { | |
3200 | if (!(data->start_class->flags & ANYOF_LOCALE)) { | |
3201 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE); | |
3202 | for (value = 0; value < 256; value++) | |
3203 | if (isSPACE(value)) | |
3204 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3205 | } | |
3206 | } | |
3207 | else { | |
3208 | if (data->start_class->flags & ANYOF_LOCALE) | |
3209 | ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE); | |
3210 | else { | |
3211 | for (value = 0; value < 256; value++) | |
3212 | if (!isSPACE(value)) | |
b81d288d | 3213 | ANYOF_BITMAP_SET(data->start_class, value); |
653099ff GS |
3214 | } |
3215 | } | |
3216 | break; | |
3217 | case NSPACEL: | |
3218 | if (flags & SCF_DO_STCLASS_AND) { | |
3219 | if (data->start_class->flags & ANYOF_LOCALE) { | |
3220 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE); | |
3221 | for (value = 0; value < 256; value++) | |
3222 | if (!isSPACE(value)) | |
3223 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3224 | } | |
3225 | } | |
3226 | else { | |
3227 | data->start_class->flags |= ANYOF_LOCALE; | |
3228 | ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE); | |
3229 | } | |
3230 | break; | |
3231 | case DIGIT: | |
3232 | if (flags & SCF_DO_STCLASS_AND) { | |
3233 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NDIGIT); | |
3234 | for (value = 0; value < 256; value++) | |
3235 | if (!isDIGIT(value)) | |
3236 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3237 | } | |
3238 | else { | |
3239 | if (data->start_class->flags & ANYOF_LOCALE) | |
3240 | ANYOF_CLASS_SET(data->start_class,ANYOF_DIGIT); | |
3241 | else { | |
3242 | for (value = 0; value < 256; value++) | |
3243 | if (isDIGIT(value)) | |
b81d288d | 3244 | ANYOF_BITMAP_SET(data->start_class, value); |
653099ff GS |
3245 | } |
3246 | } | |
3247 | break; | |
3248 | case NDIGIT: | |
3249 | if (flags & SCF_DO_STCLASS_AND) { | |
3250 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_DIGIT); | |
3251 | for (value = 0; value < 256; value++) | |
3252 | if (isDIGIT(value)) | |
3253 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3254 | } | |
3255 | else { | |
3256 | if (data->start_class->flags & ANYOF_LOCALE) | |
3257 | ANYOF_CLASS_SET(data->start_class,ANYOF_NDIGIT); | |
3258 | else { | |
3259 | for (value = 0; value < 256; value++) | |
3260 | if (!isDIGIT(value)) | |
b81d288d | 3261 | ANYOF_BITMAP_SET(data->start_class, value); |
653099ff GS |
3262 | } |
3263 | } | |
3264 | break; | |
3265 | } | |
3266 | if (flags & SCF_DO_STCLASS_OR) | |
3267 | cl_and(data->start_class, &and_with); | |
3268 | flags &= ~SCF_DO_STCLASS; | |
3269 | } | |
a0ed51b3 | 3270 | } |
3dab1dad | 3271 | else if (PL_regkind[OP(scan)] == EOL && flags & SCF_DO_SUBSTR) { |
c277df42 IZ |
3272 | data->flags |= (OP(scan) == MEOL |
3273 | ? SF_BEFORE_MEOL | |
3274 | : SF_BEFORE_SEOL); | |
a0ed51b3 | 3275 | } |
3dab1dad | 3276 | else if ( PL_regkind[OP(scan)] == BRANCHJ |
653099ff GS |
3277 | /* Lookbehind, or need to calculate parens/evals/stclass: */ |
3278 | && (scan->flags || data || (flags & SCF_DO_STCLASS)) | |
c277df42 | 3279 | && (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) { |
1de06328 YO |
3280 | if ( !PERL_ENABLE_POSITIVE_ASSERTION_STUDY |
3281 | || OP(scan) == UNLESSM ) | |
3282 | { | |
3283 | /* Negative Lookahead/lookbehind | |
3284 | In this case we can't do fixed string optimisation. | |
3285 | */ | |
3286 | ||
3287 | I32 deltanext, minnext, fake = 0; | |
3288 | regnode *nscan; | |
3289 | struct regnode_charclass_class intrnl; | |
3290 | int f = 0; | |
3291 | ||
3292 | data_fake.flags = 0; | |
3293 | if (data) { | |
3294 | data_fake.whilem_c = data->whilem_c; | |
3295 | data_fake.last_closep = data->last_closep; | |
a0ed51b3 | 3296 | } |
1de06328 YO |
3297 | else |
3298 | data_fake.last_closep = &fake; | |
3299 | if ( flags & SCF_DO_STCLASS && !scan->flags | |
3300 | && OP(scan) == IFMATCH ) { /* Lookahead */ | |
3301 | cl_init(pRExC_state, &intrnl); | |
3302 | data_fake.start_class = &intrnl; | |
3303 | f |= SCF_DO_STCLASS_AND; | |
c277df42 | 3304 | } |
1de06328 YO |
3305 | if (flags & SCF_WHILEM_VISITED_POS) |
3306 | f |= SCF_WHILEM_VISITED_POS; | |
3307 | next = regnext(scan); | |
3308 | nscan = NEXTOPER(NEXTOPER(scan)); | |
3309 | minnext = study_chunk(pRExC_state, &nscan, minlenp, &deltanext, last, &data_fake, f,depth+1); | |
3310 | if (scan->flags) { | |
3311 | if (deltanext) { | |
3312 | vFAIL("Variable length lookbehind not implemented"); | |
3313 | } | |
3314 | else if (minnext > (I32)U8_MAX) { | |
3315 | vFAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX); | |
3316 | } | |
3317 | scan->flags = (U8)minnext; | |
3318 | } | |
3319 | if (data) { | |
3320 | if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) | |
3321 | pars++; | |
3322 | if (data_fake.flags & SF_HAS_EVAL) | |
3323 | data->flags |= SF_HAS_EVAL; | |
3324 | data->whilem_c = data_fake.whilem_c; | |
3325 | } | |
3326 | if (f & SCF_DO_STCLASS_AND) { | |
3327 | const int was = (data->start_class->flags & ANYOF_EOS); | |
3328 | ||
3329 | cl_and(data->start_class, &intrnl); | |
3330 | if (was) | |
3331 | data->start_class->flags |= ANYOF_EOS; | |
3332 | } | |
be8e71aa | 3333 | } |
1de06328 YO |
3334 | #if PERL_ENABLE_POSITIVE_ASSERTION_STUDY |
3335 | else { | |
3336 | /* Positive Lookahead/lookbehind | |
3337 | In this case we can do fixed string optimisation, | |
3338 | but we must be careful about it. Note in the case of | |
3339 | lookbehind the positions will be offset by the minimum | |
3340 | length of the pattern, something we won't know about | |
3341 | until after the recurse. | |
3342 | */ | |
3343 | I32 deltanext, fake = 0; | |
3344 | regnode *nscan; | |
3345 | struct regnode_charclass_class intrnl; | |
3346 | int f = 0; | |
3347 | /* We use SAVEFREEPV so that when the full compile | |
3348 | is finished perl will clean up the allocated | |
3349 | minlens when its all done. This was we don't | |
3350 | have to worry about freeing them when we know | |
3351 | they wont be used, which would be a pain. | |
3352 | */ | |
3353 | I32 *minnextp; | |
3354 | Newx( minnextp, 1, I32 ); | |
3355 | SAVEFREEPV(minnextp); | |
3356 | ||
3357 | if (data) { | |
3358 | StructCopy(data, &data_fake, scan_data_t); | |
3359 | if ((flags & SCF_DO_SUBSTR) && data->last_found) { | |
3360 | f |= SCF_DO_SUBSTR; | |
3361 | if (scan->flags) | |
3362 | scan_commit(pRExC_state, &data_fake,minlenp); | |
3363 | data_fake.last_found=newSVsv(data->last_found); | |
3364 | } | |
3365 | } | |
3366 | else | |
3367 | data_fake.last_closep = &fake; | |
3368 | data_fake.flags = 0; | |
3369 | if (is_inf) | |
3370 | data_fake.flags |= SF_IS_INF; | |
3371 | if ( flags & SCF_DO_STCLASS && !scan->flags | |
3372 | && OP(scan) == IFMATCH ) { /* Lookahead */ | |
3373 | cl_init(pRExC_state, &intrnl); | |
3374 | data_fake.start_class = &intrnl; | |
3375 | f |= SCF_DO_STCLASS_AND; | |
3376 | } | |
3377 | if (flags & SCF_WHILEM_VISITED_POS) | |
3378 | f |= SCF_WHILEM_VISITED_POS; | |
3379 | next = regnext(scan); | |
3380 | nscan = NEXTOPER(NEXTOPER(scan)); | |
3381 | ||
3382 | *minnextp = study_chunk(pRExC_state, &nscan, minnextp, &deltanext, last, &data_fake, f,depth+1); | |
3383 | if (scan->flags) { | |
3384 | if (deltanext) { | |
3385 | vFAIL("Variable length lookbehind not implemented"); | |
3386 | } | |
3387 | else if (*minnextp > (I32)U8_MAX) { | |
3388 | vFAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX); | |
3389 | } | |
3390 | scan->flags = (U8)*minnextp; | |
3391 | } | |
3392 | ||
3393 | *minnextp += min; | |
3394 | ||
3395 | ||
3396 | if (f & SCF_DO_STCLASS_AND) { | |
3397 | const int was = (data->start_class->flags & ANYOF_EOS); | |
3398 | ||
3399 | cl_and(data->start_class, &intrnl); | |
3400 | if (was) | |
3401 | data->start_class->flags |= ANYOF_EOS; | |
3402 | } | |
3403 | if (data) { | |
3404 | if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) | |
3405 | pars++; | |
3406 | if (data_fake.flags & SF_HAS_EVAL) | |
3407 | data->flags |= SF_HAS_EVAL; | |
3408 | data->whilem_c = data_fake.whilem_c; | |
3409 | if ((flags & SCF_DO_SUBSTR) && data_fake.last_found) { | |
3410 | if (RExC_rx->minlen<*minnextp) | |
3411 | RExC_rx->minlen=*minnextp; | |
3412 | scan_commit(pRExC_state, &data_fake, minnextp); | |
3413 | SvREFCNT_dec(data_fake.last_found); | |
3414 | ||
3415 | if ( data_fake.minlen_fixed != minlenp ) | |
3416 | { | |
3417 | data->offset_fixed= data_fake.offset_fixed; | |
3418 | data->minlen_fixed= data_fake.minlen_fixed; | |
3419 | data->lookbehind_fixed+= scan->flags; | |
3420 | } | |
3421 | if ( data_fake.minlen_float != minlenp ) | |
3422 | { | |
3423 | data->minlen_float= data_fake.minlen_float; | |
3424 | data->offset_float_min=data_fake.offset_float_min; | |
3425 | data->offset_float_max=data_fake.offset_float_max; | |
3426 | data->lookbehind_float+= scan->flags; | |
3427 | } | |
3428 | } | |
3429 | } | |
3430 | ||
653099ff | 3431 | |
653099ff | 3432 | } |
1de06328 | 3433 | #endif |
a0ed51b3 LW |
3434 | } |
3435 | else if (OP(scan) == OPEN) { | |
c277df42 | 3436 | pars++; |
a0ed51b3 | 3437 | } |
cb434fcc | 3438 | else if (OP(scan) == CLOSE) { |
eb160463 | 3439 | if ((I32)ARG(scan) == is_par) { |
cb434fcc | 3440 | next = regnext(scan); |
c277df42 | 3441 | |
cb434fcc IZ |
3442 | if ( next && (OP(next) != WHILEM) && next < last) |
3443 | is_par = 0; /* Disable optimization */ | |
3444 | } | |
3445 | if (data) | |
3446 | *(data->last_closep) = ARG(scan); | |
a0ed51b3 LW |
3447 | } |
3448 | else if (OP(scan) == EVAL) { | |
c277df42 IZ |
3449 | if (data) |
3450 | data->flags |= SF_HAS_EVAL; | |
3451 | } | |
0a4db386 YO |
3452 | else if ( (OP(scan) == LOGICAL && scan->flags == 2) /* Embedded follows */ |
3453 | || OP(scan)==RECURSE) /* recursion */ | |
3454 | { | |
3455 | if (OP(scan)==RECURSE) { | |
3456 | ARG2L_SET( scan, RExC_parens[ARG(scan)-1] - scan ); | |
3457 | } | |
0f5d15d6 | 3458 | if (flags & SCF_DO_SUBSTR) { |
1de06328 | 3459 | scan_commit(pRExC_state,data,minlenp); |
0f5d15d6 IZ |
3460 | data->longest = &(data->longest_float); |
3461 | } | |
3462 | is_inf = is_inf_internal = 1; | |
653099ff | 3463 | if (flags & SCF_DO_STCLASS_OR) /* Allow everything */ |
830247a4 | 3464 | cl_anything(pRExC_state, data->start_class); |
96776eda | 3465 | flags &= ~SCF_DO_STCLASS; |
0f5d15d6 | 3466 | } |
786e8c11 YO |
3467 | #ifdef TRIE_STUDY_OPT |
3468 | #ifdef FULL_TRIE_STUDY | |
3469 | else if (PL_regkind[OP(scan)] == TRIE) { | |
3470 | /* NOTE - There is similar code to this block above for handling | |
3471 | BRANCH nodes on the initial study. If you change stuff here | |
3472 | check there too. */ | |
3473 | regnode *tail= regnext(scan); | |
3474 | reg_trie_data *trie = (reg_trie_data*)RExC_rx->data->data[ ARG(scan) ]; | |
3475 | I32 max1 = 0, min1 = I32_MAX; | |
3476 | struct regnode_charclass_class accum; | |
3477 | ||
3478 | if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */ | |
1de06328 | 3479 | scan_commit(pRExC_state, data,minlenp); /* Cannot merge strings after this. */ |
786e8c11 YO |
3480 | if (flags & SCF_DO_STCLASS) |
3481 | cl_init_zero(pRExC_state, &accum); | |
3482 | ||
3483 | if (!trie->jump) { | |
3484 | min1= trie->minlen; | |
3485 | max1= trie->maxlen; | |
3486 | } else { | |
3487 | const regnode *nextbranch= NULL; | |
3488 | U32 word; | |
3489 | ||
3490 | for ( word=1 ; word <= trie->wordcount ; word++) | |
3491 | { | |
3492 | I32 deltanext=0, minnext=0, f = 0, fake; | |
3493 | struct regnode_charclass_class this_class; | |
3494 | ||
3495 | data_fake.flags = 0; | |
3496 | if (data) { | |
3497 | data_fake.whilem_c = data->whilem_c; | |
3498 | data_fake.last_closep = data->last_closep; | |
3499 | } | |
3500 | else | |
3501 | data_fake.last_closep = &fake; | |
3502 | ||
3503 | if (flags & SCF_DO_STCLASS) { | |
3504 | cl_init(pRExC_state, &this_class); | |
3505 | data_fake.start_class = &this_class; | |
3506 | f = SCF_DO_STCLASS_AND; | |
3507 | } | |
3508 | if (flags & SCF_WHILEM_VISITED_POS) | |
3509 | f |= SCF_WHILEM_VISITED_POS; | |
3510 | ||
3511 | if (trie->jump[word]) { | |
3512 | if (!nextbranch) | |
3513 | nextbranch = tail - trie->jump[0]; | |
3514 | scan= tail - trie->jump[word]; | |
3515 | /* We go from the jump point to the branch that follows | |
3516 | it. Note this means we need the vestigal unused branches | |
3517 | even though they arent otherwise used. | |
3518 | */ | |
1de06328 | 3519 | minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext, |
786e8c11 YO |
3520 | (regnode *)nextbranch, &data_fake, f,depth+1); |
3521 | } | |
3522 | if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH) | |
3523 | nextbranch= regnext((regnode*)nextbranch); | |
3524 | ||
3525 | if (min1 > (I32)(minnext + trie->minlen)) | |
3526 | min1 = minnext + trie->minlen; | |
3527 | if (max1 < (I32)(minnext + deltanext + trie->maxlen)) | |
3528 | max1 = minnext + deltanext + trie->maxlen; | |
3529 | if (deltanext == I32_MAX) | |
3530 | is_inf = is_inf_internal = 1; | |
3531 | ||
3532 | if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) | |
3533 | pars++; | |
3534 | ||
3535 | if (data) { | |
3536 | if (data_fake.flags & SF_HAS_EVAL) | |
3537 | data->flags |= SF_HAS_EVAL; | |
3538 | data->whilem_c = data_fake.whilem_c; | |
3539 | } | |
3540 | if (flags & SCF_DO_STCLASS) | |
3541 | cl_or(pRExC_state, &accum, &this_class); | |
3542 | } | |
3543 | } | |
3544 | if (flags & SCF_DO_SUBSTR) { | |
3545 | data->pos_min += min1; | |
3546 | data->pos_delta += max1 - min1; | |
3547 | if (max1 != min1 || is_inf) | |
3548 | data->longest = &(data->longest_float); | |
3549 | } | |
3550 | min += min1; | |
3551 | delta += max1 - min1; | |
3552 | if (flags & SCF_DO_STCLASS_OR) { | |
3553 | cl_or(pRExC_state, data->start_class, &accum); | |
3554 | if (min1) { | |
3555 | cl_and(data->start_class, &and_with); | |
3556 | flags &= ~SCF_DO_STCLASS; | |
3557 | } | |
3558 | } | |
3559 | else if (flags & SCF_DO_STCLASS_AND) { | |
3560 | if (min1) { | |
3561 | cl_and(data->start_class, &accum); | |
3562 | flags &= ~SCF_DO_STCLASS; | |
3563 | } | |
3564 | else { | |
3565 | /* Switch to OR mode: cache the old value of | |
3566 | * data->start_class */ | |
3567 | StructCopy(data->start_class, &and_with, | |
3568 | struct regnode_charclass_class); | |
3569 | flags &= ~SCF_DO_STCLASS_AND; | |
3570 | StructCopy(&accum, data->start_class, | |
3571 | struct regnode_charclass_class); | |
3572 | flags |= SCF_DO_STCLASS_OR; | |
3573 | data->start_class->flags |= ANYOF_EOS; | |
3574 | } | |
3575 | } | |
3576 | scan= tail; | |
3577 | continue; | |
3578 | } | |
3579 | #else | |
3580 | else if (PL_regkind[OP(scan)] == TRIE) { | |
3581 | reg_trie_data *trie = (reg_trie_data*)RExC_rx->data->data[ ARG(scan) ]; | |
3582 | U8*bang=NULL; | |
3583 | ||
3584 | min += trie->minlen; | |
3585 | delta += (trie->maxlen - trie->minlen); | |
3586 | flags &= ~SCF_DO_STCLASS; /* xxx */ | |
3587 | if (flags & SCF_DO_SUBSTR) { | |
1de06328 | 3588 | scan_commit(pRExC_state,data,minlenp); /* Cannot expect anything... */ |
786e8c11 YO |
3589 | data->pos_min += trie->minlen; |
3590 | data->pos_delta += (trie->maxlen - trie->minlen); | |
3591 | if (trie->maxlen != trie->minlen) | |
3592 | data->longest = &(data->longest_float); | |
3593 | } | |
3594 | if (trie->jump) /* no more substrings -- for now /grr*/ | |
3595 | flags &= ~SCF_DO_SUBSTR; | |
3596 | } | |
3597 | #endif /* old or new */ | |
3598 | #endif /* TRIE_STUDY_OPT */ | |
c277df42 IZ |
3599 | /* Else: zero-length, ignore. */ |
3600 | scan = regnext(scan); | |
3601 | } | |
3602 | ||
3603 | finish: | |
3604 | *scanp = scan; | |
aca2d497 | 3605 | *deltap = is_inf_internal ? I32_MAX : delta; |
b81d288d | 3606 | if (flags & SCF_DO_SUBSTR && is_inf) |
c277df42 | 3607 | data->pos_delta = I32_MAX - data->pos_min; |
786e8c11 | 3608 | if (is_par > (I32)U8_MAX) |
c277df42 IZ |
3609 | is_par = 0; |
3610 | if (is_par && pars==1 && data) { | |
3611 | data->flags |= SF_IN_PAR; | |
3612 | data->flags &= ~SF_HAS_PAR; | |
a0ed51b3 LW |
3613 | } |
3614 | else if (pars && data) { | |
c277df42 IZ |
3615 | data->flags |= SF_HAS_PAR; |
3616 | data->flags &= ~SF_IN_PAR; | |
3617 | } | |
653099ff GS |
3618 | if (flags & SCF_DO_STCLASS_OR) |
3619 | cl_and(data->start_class, &and_with); | |
786e8c11 YO |
3620 | if (flags & SCF_TRIE_RESTUDY) |
3621 | data->flags |= SCF_TRIE_RESTUDY; | |
1de06328 YO |
3622 | |
3623 | DEBUG_STUDYDATA(data,depth); | |
3624 | ||
c277df42 IZ |
3625 | return min; |
3626 | } | |
3627 | ||
76e3520e | 3628 | STATIC I32 |
5f66b61c | 3629 | S_add_data(RExC_state_t *pRExC_state, I32 n, const char *s) |
c277df42 | 3630 | { |
830247a4 | 3631 | if (RExC_rx->data) { |
2eb97020 | 3632 | const U32 count = RExC_rx->data->count; |
b81d288d | 3633 | Renewc(RExC_rx->data, |
2eb97020 | 3634 | sizeof(*RExC_rx->data) + sizeof(void*) * (count + n - 1), |
c277df42 | 3635 | char, struct reg_data); |
2eb97020 | 3636 | Renew(RExC_rx->data->what, count + n, U8); |
830247a4 | 3637 | RExC_rx->data->count += n; |
a0ed51b3 LW |
3638 | } |
3639 | else { | |
a02a5408 | 3640 | Newxc(RExC_rx->data, sizeof(*RExC_rx->data) + sizeof(void*) * (n - 1), |
c277df42 | 3641 | char, struct reg_data); |
a02a5408 | 3642 | Newx(RExC_rx->data->what, n, U8); |
830247a4 | 3643 | RExC_rx->data->count = n; |
c277df42 | 3644 | } |
830247a4 IZ |
3645 | Copy(s, RExC_rx->data->what + RExC_rx->data->count - n, n, U8); |
3646 | return RExC_rx->data->count - n; | |
c277df42 IZ |
3647 | } |
3648 | ||
76234dfb | 3649 | #ifndef PERL_IN_XSUB_RE |
d88dccdf | 3650 | void |
864dbfa3 | 3651 | Perl_reginitcolors(pTHX) |
d88dccdf | 3652 | { |
97aff369 | 3653 | dVAR; |
1df70142 | 3654 | const char * const s = PerlEnv_getenv("PERL_RE_COLORS"); |
d88dccdf | 3655 | if (s) { |
1df70142 AL |
3656 | char *t = savepv(s); |
3657 | int i = 0; | |
3658 | PL_colors[0] = t; | |
d88dccdf | 3659 | while (++i < 6) { |
1df70142 AL |
3660 | t = strchr(t, '\t'); |
3661 | if (t) { | |
3662 | *t = '\0'; | |
3663 | PL_colors[i] = ++t; | |
d88dccdf IZ |
3664 | } |
3665 | else | |
1df70142 | 3666 | PL_colors[i] = t = (char *)""; |
d88dccdf IZ |
3667 | } |
3668 | } else { | |
1df70142 | 3669 | int i = 0; |
b81d288d | 3670 | while (i < 6) |
06b5626a | 3671 | PL_colors[i++] = (char *)""; |
d88dccdf IZ |
3672 | } |
3673 | PL_colorset = 1; | |
3674 | } | |
76234dfb | 3675 | #endif |
8615cb43 | 3676 | |
07be1b83 | 3677 | |
786e8c11 YO |
3678 | #ifdef TRIE_STUDY_OPT |
3679 | #define CHECK_RESTUDY_GOTO \ | |
3680 | if ( \ | |
3681 | (data.flags & SCF_TRIE_RESTUDY) \ | |
3682 | && ! restudied++ \ | |
3683 | ) goto reStudy | |
3684 | #else | |
3685 | #define CHECK_RESTUDY_GOTO | |
3686 | #endif | |
f9f4320a | 3687 | |
a687059c | 3688 | /* |
e50aee73 | 3689 | - pregcomp - compile a regular expression into internal code |
a687059c LW |
3690 | * |
3691 | * We can't allocate space until we know how big the compiled form will be, | |
3692 | * but we can't compile it (and thus know how big it is) until we've got a | |
3693 | * place to put the code. So we cheat: we compile it twice, once with code | |
3694 | * generation turned off and size counting turned on, and once "for real". | |
3695 | * This also means that we don't allocate space until we are sure that the | |
3696 | * thing really will compile successfully, and we never have to move the | |
3697 | * code and thus invalidate pointers into it. (Note that it has to be in | |
3698 | * one piece because free() must be able to free it all.) [NB: not true in perl] | |
3699 | * | |
3700 | * Beware that the optimization-preparation code in here knows about some | |
3701 | * of the structure of the compiled regexp. [I'll say.] | |
3702 | */ | |
b9b4dddf YO |
3703 | |
3704 | ||
3705 | ||
f9f4320a | 3706 | #ifndef PERL_IN_XSUB_RE |
f9f4320a YO |
3707 | #define RE_ENGINE_PTR &PL_core_reg_engine |
3708 | #else | |
f9f4320a YO |
3709 | extern const struct regexp_engine my_reg_engine; |
3710 | #define RE_ENGINE_PTR &my_reg_engine | |
3711 | #endif | |
b9b4dddf YO |
3712 | /* these make a few things look better, to avoid indentation */ |
3713 | #define BEGIN_BLOCK { | |
f9f4320a YO |
3714 | #define END_BLOCK } |
3715 | ||
a687059c | 3716 | regexp * |
864dbfa3 | 3717 | Perl_pregcomp(pTHX_ char *exp, char *xend, PMOP *pm) |
a687059c | 3718 | { |
97aff369 | 3719 | dVAR; |
f9f4320a YO |
3720 | GET_RE_DEBUG_FLAGS_DECL; |
3721 | DEBUG_r(if (!PL_colorset) reginitcolors()); | |
b9b4dddf YO |
3722 | #ifndef PERL_IN_XSUB_RE |
3723 | BEGIN_BLOCK | |
f9f4320a YO |
3724 | /* Dispatch a request to compile a regexp to correct |
3725 | regexp engine. */ | |
3726 | HV * const table = GvHV(PL_hintgv); | |
3727 | if (table) { | |
3728 | SV **ptr= hv_fetchs(table, "regcomp", FALSE); | |
3729 | if (ptr && SvIOK(*ptr)) { | |
3730 | const regexp_engine *eng=INT2PTR(regexp_engine*,SvIV(*ptr)); | |
3731 | DEBUG_COMPILE_r({ | |
8d8756e7 | 3732 | PerlIO_printf(Perl_debug_log, "Using engine %"UVxf"\n", |
f9f4320a YO |
3733 | SvIV(*ptr)); |
3734 | }); | |
f2f78491 | 3735 | return CALLREGCOMP_ENG(eng, exp, xend, pm); |
f9f4320a | 3736 | } |
b9b4dddf YO |
3737 | } |
3738 | END_BLOCK | |
3739 | #endif | |
3740 | BEGIN_BLOCK | |
a0d0e21e | 3741 | register regexp *r; |
c277df42 | 3742 | regnode *scan; |
c277df42 | 3743 | regnode *first; |
a0d0e21e | 3744 | I32 flags; |
a0d0e21e LW |
3745 | I32 minlen = 0; |
3746 | I32 sawplus = 0; | |
3747 | I32 sawopen = 0; | |
2c2d71f5 | 3748 | scan_data_t data; |
830247a4 | 3749 | RExC_state_t RExC_state; |
be8e71aa | 3750 | RExC_state_t * const pRExC_state = &RExC_state; |
07be1b83 YO |
3751 | #ifdef TRIE_STUDY_OPT |
3752 | int restudied= 0; | |
3753 | RExC_state_t copyRExC_state; | |
3754 | #endif | |
a0d0e21e | 3755 | if (exp == NULL) |
c277df42 | 3756 | FAIL("NULL regexp argument"); |
a0d0e21e | 3757 | |
a5961de5 | 3758 | RExC_utf8 = pm->op_pmdynflags & PMdf_CMP_UTF8; |
a0ed51b3 | 3759 | |
5cfc7842 | 3760 | RExC_precomp = exp; |
a3621e74 | 3761 | DEBUG_COMPILE_r({ |
ab3bbdeb YO |
3762 | SV *dsv= sv_newmortal(); |
3763 | RE_PV_QUOTED_DECL(s, RExC_utf8, | |
3764 | dsv, RExC_precomp, (xend - exp), 60); | |
3765 | PerlIO_printf(Perl_debug_log, "%sCompiling REx%s %s\n", | |
3766 | PL_colors[4],PL_colors[5],s); | |
a5961de5 | 3767 | }); |
e2509266 | 3768 | RExC_flags = pm->op_pmflags; |
830247a4 | 3769 | RExC_sawback = 0; |
bbce6d69 | 3770 | |
830247a4 IZ |
3771 | RExC_seen = 0; |
3772 | RExC_seen_zerolen = *exp == '^' ? -1 : 0; | |
3773 | RExC_seen_evals = 0; | |
3774 | RExC_extralen = 0; | |
c277df42 | 3775 | |
bbce6d69 | 3776 | /* First pass: determine size, legality. */ |
830247a4 | 3777 | RExC_parse = exp; |
fac92740 | 3778 | RExC_start = exp; |
830247a4 IZ |
3779 | RExC_end = xend; |
3780 | RExC_naughty = 0; | |
3781 | RExC_npar = 1; | |
3782 | RExC_size = 0L; | |
3783 | RExC_emit = &PL_regdummy; | |
3784 | RExC_whilem_seen = 0; | |
fc8cd66c | 3785 | RExC_charnames = NULL; |
81714fb9 YO |
3786 | RExC_parens = NULL; |
3787 | RExC_paren_names = NULL; | |
3788 | ||
85ddcde9 JH |
3789 | #if 0 /* REGC() is (currently) a NOP at the first pass. |
3790 | * Clever compilers notice this and complain. --jhi */ | |
830247a4 | 3791 | REGC((U8)REG_MAGIC, (char*)RExC_emit); |
85ddcde9 | 3792 | #endif |
3dab1dad YO |
3793 | DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "Starting first pass (sizing)\n")); |
3794 | if (reg(pRExC_state, 0, &flags,1) == NULL) { | |
c445ea15 | 3795 | RExC_precomp = NULL; |
a0d0e21e LW |
3796 | return(NULL); |
3797 | } | |
07be1b83 | 3798 | DEBUG_PARSE_r({ |
81714fb9 YO |
3799 | PerlIO_printf(Perl_debug_log, |
3800 | "Required size %"IVdf" nodes\n" | |
3801 | "Starting second pass (creation)\n", | |
3802 | (IV)RExC_size); | |
07be1b83 YO |
3803 | RExC_lastnum=0; |
3804 | RExC_lastparse=NULL; | |
3805 | }); | |
c277df42 IZ |
3806 | /* Small enough for pointer-storage convention? |
3807 | If extralen==0, this means that we will not need long jumps. */ | |
830247a4 IZ |
3808 | if (RExC_size >= 0x10000L && RExC_extralen) |
3809 | RExC_size += RExC_extralen; | |
c277df42 | 3810 | else |
830247a4 IZ |
3811 | RExC_extralen = 0; |
3812 | if (RExC_whilem_seen > 15) | |
3813 | RExC_whilem_seen = 15; | |
a0d0e21e | 3814 | |
f9f4320a YO |
3815 | /* Allocate space and zero-initialize. Note, the two step process |
3816 | of zeroing when in debug mode, thus anything assigned has to | |
3817 | happen after that */ | |
a02a5408 | 3818 | Newxc(r, sizeof(regexp) + (unsigned)RExC_size * sizeof(regnode), |
c277df42 | 3819 | char, regexp); |
a0d0e21e | 3820 | if (r == NULL) |
b45f050a | 3821 | FAIL("Regexp out of space"); |
0f79a09d GS |
3822 | #ifdef DEBUGGING |
3823 | /* avoid reading uninitialized memory in DEBUGGING code in study_chunk() */ | |
830247a4 | 3824 | Zero(r, sizeof(regexp) + (unsigned)RExC_size * sizeof(regnode), char); |
0f79a09d | 3825 | #endif |
f9f4320a YO |
3826 | /* initialization begins here */ |
3827 | r->engine= RE_ENGINE_PTR; | |
c277df42 | 3828 | r->refcnt = 1; |
bbce6d69 | 3829 | r->prelen = xend - exp; |
5cfc7842 | 3830 | r->precomp = savepvn(RExC_precomp, r->prelen); |
cf93c79d | 3831 | r->subbeg = NULL; |
f8c7b90f | 3832 | #ifdef PERL_OLD_COPY_ON_WRITE |
c445ea15 | 3833 | r->saved_copy = NULL; |
ed252734 | 3834 | #endif |
cf93c79d | 3835 | r->reganch = pm->op_pmflags & PMf_COMPILETIME; |
830247a4 | 3836 | r->nparens = RExC_npar - 1; /* set early to validate backrefs */ |
38d1b06f | 3837 | r->lastparen = 0; /* mg.c reads this. */ |
4327152a IZ |
3838 | |
3839 | r->substrs = 0; /* Useful during FAIL. */ | |
3840 | r->startp = 0; /* Useful during FAIL. */ | |
6bda09f9 | 3841 | r->endp = 0; |
81714fb9 YO |
3842 | r->paren_names = 0; |
3843 | ||
6bda09f9 YO |
3844 | if (RExC_seen & REG_SEEN_RECURSE) { |
3845 | Newx(RExC_parens, RExC_npar,regnode *); | |
3846 | SAVEFREEPV(RExC_parens); | |
3847 | } | |
3848 | ||
3849 | /* Useful during FAIL. */ | |
a02a5408 | 3850 | Newxz(r->offsets, 2*RExC_size+1, U32); /* MJD 20001228 */ |
fac92740 | 3851 | if (r->offsets) { |
2af232bd | 3852 | r->offsets[0] = RExC_size; |
fac92740 | 3853 | } |
a3621e74 | 3854 | DEBUG_OFFSETS_r(PerlIO_printf(Perl_debug_log, |
2af232bd SS |
3855 | "%s %"UVuf" bytes for offset annotations.\n", |
3856 | r->offsets ? "Got" : "Couldn't get", | |
392fbf5d | 3857 | (UV)((2*RExC_size+1) * sizeof(U32)))); |
fac92740 | 3858 | |
830247a4 | 3859 | RExC_rx = r; |
bbce6d69 | 3860 | |
3861 | /* Second pass: emit code. */ | |
e2509266 | 3862 | RExC_flags = pm->op_pmflags; /* don't let top level (?i) bleed */ |
830247a4 IZ |
3863 | RExC_parse = exp; |
3864 | RExC_end = xend; | |
3865 | RExC_naughty = 0; | |
3866 | RExC_npar = 1; | |
fac92740 | 3867 | RExC_emit_start = r->program; |
830247a4 | 3868 | RExC_emit = r->program; |
2cd61cdb | 3869 | /* Store the count of eval-groups for security checks: */ |
786e8c11 | 3870 | RExC_emit->next_off = (RExC_seen_evals > (I32)U16_MAX) ? U16_MAX : (U16)RExC_seen_evals; |
830247a4 | 3871 | REGC((U8)REG_MAGIC, (char*) RExC_emit++); |
c277df42 | 3872 | r->data = 0; |
3dab1dad | 3873 | if (reg(pRExC_state, 0, &flags,1) == NULL) |
a0d0e21e | 3874 | return(NULL); |
6bda09f9 | 3875 | |
07be1b83 YO |
3876 | /* XXXX To minimize changes to RE engine we always allocate |
3877 | 3-units-long substrs field. */ | |
3878 | Newx(r->substrs, 1, struct reg_substr_data); | |
a0d0e21e | 3879 | |
07be1b83 | 3880 | reStudy: |
1de06328 | 3881 | r->minlen = minlen = sawplus = sawopen = 0; |
07be1b83 YO |
3882 | Zero(r->substrs, 1, struct reg_substr_data); |
3883 | StructCopy(&zero_scan_data, &data, scan_data_t); | |
a3621e74 | 3884 | |
07be1b83 YO |
3885 | #ifdef TRIE_STUDY_OPT |
3886 | if ( restudied ) { | |
3887 | DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log,"Restudying\n")); | |
3888 | RExC_state=copyRExC_state; | |
1de06328 | 3889 | if (data.last_found) { |
07be1b83 | 3890 | SvREFCNT_dec(data.longest_fixed); |
07be1b83 | 3891 | SvREFCNT_dec(data.longest_float); |
07be1b83 | 3892 | SvREFCNT_dec(data.last_found); |
1de06328 | 3893 | } |
07be1b83 YO |
3894 | } else { |
3895 | copyRExC_state=RExC_state; | |
3896 | } | |
3897 | #endif | |
fc8cd66c | 3898 | |
a0d0e21e | 3899 | /* Dig out information for optimizations. */ |
cf93c79d | 3900 | r->reganch = pm->op_pmflags & PMf_COMPILETIME; /* Again? */ |
e2509266 | 3901 | pm->op_pmflags = RExC_flags; |
a0ed51b3 | 3902 | if (UTF) |
5ff6fc6d | 3903 | r->reganch |= ROPT_UTF8; /* Unicode in it? */ |
c277df42 | 3904 | r->regstclass = NULL; |
830247a4 | 3905 | if (RExC_naughty >= 10) /* Probably an expensive pattern. */ |
a0ed51b3 | 3906 | r->reganch |= ROPT_NAUGHTY; |
c277df42 | 3907 | scan = r->program + 1; /* First BRANCH. */ |
2779dcf1 | 3908 | |
1de06328 YO |
3909 | /* testing for BRANCH here tells us whether there is "must appear" |
3910 | data in the pattern. If there is then we can use it for optimisations */ | |
eaf3ca90 | 3911 | if (!(RExC_seen & REG_TOP_LEVEL_BRANCHES)) { /* Only one top-level choice. */ |
c277df42 | 3912 | I32 fake; |
c5254dd6 | 3913 | STRLEN longest_float_length, longest_fixed_length; |
07be1b83 | 3914 | struct regnode_charclass_class ch_class; /* pointed to by data */ |
653099ff | 3915 | int stclass_flag; |
07be1b83 | 3916 | I32 last_close = 0; /* pointed to by data */ |
a0d0e21e LW |
3917 | |
3918 | first = scan; | |
c277df42 | 3919 | /* Skip introductions and multiplicators >= 1. */ |
a0d0e21e | 3920 | while ((OP(first) == OPEN && (sawopen = 1)) || |
653099ff | 3921 | /* An OR of *one* alternative - should not happen now. */ |
a0d0e21e | 3922 | (OP(first) == BRANCH && OP(regnext(first)) != BRANCH) || |
07be1b83 YO |
3923 | /* for now we can't handle lookbehind IFMATCH*/ |
3924 | (OP(first) == IFMATCH && !first->flags) || | |
a0d0e21e LW |
3925 | (OP(first) == PLUS) || |
3926 | (OP(first) == MINMOD) || | |
653099ff | 3927 | /* An {n,m} with n>0 */ |
07be1b83 YO |
3928 | (PL_regkind[OP(first)] == CURLY && ARG1(first) > 0) ) |
3929 | { | |
786e8c11 | 3930 | |
a0d0e21e LW |
3931 | if (OP(first) == PLUS) |
3932 | sawplus = 1; | |
3933 | else | |
3dab1dad | 3934 | first += regarglen[OP(first)]; |
07be1b83 YO |
3935 | if (OP(first) == IFMATCH) { |
3936 | first = NEXTOPER(first); | |
3937 | first += EXTRA_STEP_2ARGS; | |
7c167cea | 3938 | } else /* XXX possible optimisation for /(?=)/ */ |
07be1b83 | 3939 | first = NEXTOPER(first); |
a687059c LW |
3940 | } |
3941 | ||
a0d0e21e LW |
3942 | /* Starting-point info. */ |
3943 | again: | |
786e8c11 | 3944 | DEBUG_PEEP("first:",first,0); |
07be1b83 | 3945 | /* Ignore EXACT as we deal with it later. */ |
3dab1dad | 3946 | if (PL_regkind[OP(first)] == EXACT) { |
1aa99e6b | 3947 | if (OP(first) == EXACT) |
6f207bd3 | 3948 | NOOP; /* Empty, get anchored substr later. */ |
1aa99e6b | 3949 | else if ((OP(first) == EXACTF || OP(first) == EXACTFL)) |
b3c9acc1 IZ |
3950 | r->regstclass = first; |
3951 | } | |
07be1b83 | 3952 | #ifdef TRIE_STCLASS |
786e8c11 | 3953 | else if (PL_regkind[OP(first)] == TRIE && |
07be1b83 YO |
3954 | ((reg_trie_data *)r->data->data[ ARG(first) ])->minlen>0) |
3955 | { | |
786e8c11 | 3956 | regnode *trie_op; |
07be1b83 | 3957 | /* this can happen only on restudy */ |
786e8c11 YO |
3958 | if ( OP(first) == TRIE ) { |
3959 | struct regnode_1 *trieop; | |
3960 | Newxz(trieop,1,struct regnode_1); | |
3961 | StructCopy(first,trieop,struct regnode_1); | |
3962 | trie_op=(regnode *)trieop; | |
3963 | } else { | |
3964 | struct regnode_charclass *trieop; | |
3965 | Newxz(trieop,1,struct regnode_charclass); | |
3966 | StructCopy(first,trieop,struct regnode_charclass); | |
3967 | trie_op=(regnode *)trieop; | |
3968 | } | |
1de06328 | 3969 | OP(trie_op)+=2; |
786e8c11 YO |
3970 | make_trie_failtable(pRExC_state, (regnode *)first, trie_op, 0); |
3971 | r->regstclass = trie_op; | |
07be1b83 YO |
3972 | } |
3973 | #endif | |
bfed75c6 | 3974 | else if (strchr((const char*)PL_simple,OP(first))) |
a0d0e21e | 3975 | r->regstclass = first; |
3dab1dad YO |
3976 | else if (PL_regkind[OP(first)] == BOUND || |
3977 | PL_regkind[OP(first)] == NBOUND) | |
a0d0e21e | 3978 | r->regstclass = first; |
3dab1dad | 3979 | else if (PL_regkind[OP(first)] == BOL) { |
cad2e5aa JH |
3980 | r->reganch |= (OP(first) == MBOL |
3981 | ? ROPT_ANCH_MBOL | |
3982 | : (OP(first) == SBOL | |
3983 | ? ROPT_ANCH_SBOL | |
3984 | : ROPT_ANCH_BOL)); | |
a0d0e21e | 3985 | first = NEXTOPER(first); |
774d564b | 3986 | goto again; |
3987 | } | |
3988 | else if (OP(first) == GPOS) { | |
3989 | r->reganch |= ROPT_ANCH_GPOS; | |
3990 | first = NEXTOPER(first); | |
3991 | goto again; | |
a0d0e21e | 3992 | } |
e09294f4 | 3993 | else if (!sawopen && (OP(first) == STAR && |
3dab1dad | 3994 | PL_regkind[OP(NEXTOPER(first))] == REG_ANY) && |
a0d0e21e LW |
3995 | !(r->reganch & ROPT_ANCH) ) |
3996 | { | |
3997 | /* turn .* into ^.* with an implied $*=1 */ | |
1df70142 AL |
3998 | const int type = |
3999 | (OP(NEXTOPER(first)) == REG_ANY) | |
4000 | ? ROPT_ANCH_MBOL | |
4001 | : ROPT_ANCH_SBOL; | |
cad2e5aa | 4002 | r->reganch |= type | ROPT_IMPLICIT; |
a0d0e21e | 4003 | first = NEXTOPER(first); |
774d564b | 4004 | goto again; |
a0d0e21e | 4005 | } |
b81d288d | 4006 | if (sawplus && (!sawopen || !RExC_sawback) |
830247a4 | 4007 | && !(RExC_seen & REG_SEEN_EVAL)) /* May examine pos and $& */ |
cad2e5aa JH |
4008 | /* x+ must match at the 1st pos of run of x's */ |
4009 | r->reganch |= ROPT_SKIP; | |
a0d0e21e | 4010 | |
c277df42 | 4011 | /* Scan is after the zeroth branch, first is atomic matcher. */ |
be8e71aa | 4012 | #ifdef TRIE_STUDY_OPT |
81714fb9 | 4013 | DEBUG_PARSE_r( |
be8e71aa YO |
4014 | if (!restudied) |
4015 | PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n", | |
4016 | (IV)(first - scan + 1)) | |
4017 | ); | |
4018 | #else | |
81714fb9 | 4019 | DEBUG_PARSE_r( |
be8e71aa YO |
4020 | PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n", |
4021 | (IV)(first - scan + 1)) | |
4022 | ); | |
4023 | #endif | |
4024 | ||
4025 | ||
a0d0e21e LW |
4026 | /* |
4027 | * If there's something expensive in the r.e., find the | |
4028 | * longest literal string that must appear and make it the | |
4029 | * regmust. Resolve ties in favor of later strings, since | |
4030 | * the regstart check works with the beginning of the r.e. | |
4031 | * and avoiding duplication strengthens checking. Not a | |
4032 | * strong reason, but sufficient in the absence of others. | |
4033 | * [Now we resolve ties in favor of the earlier string if | |
c277df42 | 4034 | * it happens that c_offset_min has been invalidated, since the |
a0d0e21e LW |
4035 | * earlier string may buy us something the later one won't.] |
4036 | */ | |
a0d0e21e | 4037 | minlen = 0; |
a687059c | 4038 | |
396482e1 GA |
4039 | data.longest_fixed = newSVpvs(""); |
4040 | data.longest_float = newSVpvs(""); | |
4041 | data.last_found = newSVpvs(""); | |
c277df42 IZ |
4042 | data.longest = &(data.longest_fixed); |
4043 | first = scan; | |
653099ff | 4044 | if (!r->regstclass) { |
830247a4 | 4045 | cl_init(pRExC_state, &ch_class); |
653099ff GS |
4046 | data.start_class = &ch_class; |
4047 | stclass_flag = SCF_DO_STCLASS_AND; | |
4048 | } else /* XXXX Check for BOUND? */ | |
4049 | stclass_flag = 0; | |
cb434fcc | 4050 | data.last_closep = &last_close; |
653099ff | 4051 | |
1de06328 | 4052 | minlen = study_chunk(pRExC_state, &first, &minlen, &fake, scan + RExC_size, /* Up to end */ |
a3621e74 | 4053 | &data, SCF_DO_SUBSTR | SCF_WHILEM_VISITED_POS | stclass_flag,0); |
07be1b83 | 4054 | |
07be1b83 | 4055 | |
786e8c11 YO |
4056 | CHECK_RESTUDY_GOTO; |
4057 | ||
4058 | ||
830247a4 | 4059 | if ( RExC_npar == 1 && data.longest == &(data.longest_fixed) |
b81d288d | 4060 | && data.last_start_min == 0 && data.last_end > 0 |
830247a4 IZ |
4061 | && !RExC_seen_zerolen |
4062 | && (!(RExC_seen & REG_SEEN_GPOS) || (r->reganch & ROPT_ANCH_GPOS))) | |
c277df42 | 4063 | r->reganch |= ROPT_CHECK_ALL; |
1de06328 | 4064 | scan_commit(pRExC_state, &data,&minlen); |
c277df42 IZ |
4065 | SvREFCNT_dec(data.last_found); |
4066 | ||
1de06328 YO |
4067 | /* Note that code very similar to this but for anchored string |
4068 | follows immediately below, changes may need to be made to both. | |
4069 | Be careful. | |
4070 | */ | |
a0ed51b3 | 4071 | longest_float_length = CHR_SVLEN(data.longest_float); |
c5254dd6 | 4072 | if (longest_float_length |
c277df42 IZ |
4073 | || (data.flags & SF_FL_BEFORE_EOL |
4074 | && (!(data.flags & SF_FL_BEFORE_MEOL) | |
1de06328 YO |
4075 | || (RExC_flags & PMf_MULTILINE)))) |
4076 | { | |
1182767e | 4077 | I32 t,ml; |
cf93c79d | 4078 | |
1de06328 | 4079 | if (SvCUR(data.longest_fixed) /* ok to leave SvCUR */ |
aca2d497 IZ |
4080 | && data.offset_fixed == data.offset_float_min |
4081 | && SvCUR(data.longest_fixed) == SvCUR(data.longest_float)) | |
4082 | goto remove_float; /* As in (a)+. */ | |
4083 | ||
1de06328 YO |
4084 | /* copy the information about the longest float from the reg_scan_data |
4085 | over to the program. */ | |
33b8afdf JH |
4086 | if (SvUTF8(data.longest_float)) { |
4087 | r->float_utf8 = data.longest_float; | |
c445ea15 | 4088 | r->float_substr = NULL; |
33b8afdf JH |
4089 | } else { |
4090 | r->float_substr = data.longest_float; | |
c445ea15 | 4091 | r->float_utf8 = NULL; |
33b8afdf | 4092 | } |
1de06328 YO |
4093 | /* float_end_shift is how many chars that must be matched that |
4094 | follow this item. We calculate it ahead of time as once the | |
4095 | lookbehind offset is added in we lose the ability to correctly | |
4096 | calculate it.*/ | |
4097 | ml = data.minlen_float ? *(data.minlen_float) | |
1182767e | 4098 | : (I32)longest_float_length; |
1de06328 YO |
4099 | r->float_end_shift = ml - data.offset_float_min |
4100 | - longest_float_length + (SvTAIL(data.longest_float) != 0) | |
4101 | + data.lookbehind_float; | |
4102 | r->float_min_offset = data.offset_float_min - data.lookbehind_float; | |
c277df42 | 4103 | r->float_max_offset = data.offset_float_max; |
1182767e | 4104 | if (data.offset_float_max < I32_MAX) /* Don't offset infinity */ |
1de06328 YO |
4105 | r->float_max_offset -= data.lookbehind_float; |
4106 | ||
cf93c79d IZ |
4107 | t = (data.flags & SF_FL_BEFORE_EOL /* Can't have SEOL and MULTI */ |
4108 | && (!(data.flags & SF_FL_BEFORE_MEOL) | |
e2509266 | 4109 | || (RExC_flags & PMf_MULTILINE))); |
33b8afdf | 4110 | fbm_compile(data.longest_float, t ? FBMcf_TAIL : 0); |
a0ed51b3 LW |
4111 | } |
4112 | else { | |
aca2d497 | 4113 | remove_float: |
c445ea15 | 4114 | r->float_substr = r->float_utf8 = NULL; |
c277df42 | 4115 | SvREFCNT_dec(data.longest_float); |
c5254dd6 | 4116 | longest_float_length = 0; |
a0d0e21e | 4117 | } |
c277df42 | 4118 | |
1de06328 YO |
4119 | /* Note that code very similar to this but for floating string |
4120 | is immediately above, changes may need to be made to both. | |
4121 | Be careful. | |
4122 | */ | |
a0ed51b3 | 4123 | longest_fixed_length = CHR_SVLEN(data.longest_fixed); |
c5254dd6 | 4124 | if (longest_fixed_length |
c277df42 IZ |
4125 | || (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */ |
4126 | && (!(data.flags & SF_FIX_BEFORE_MEOL) | |
1de06328 YO |
4127 | || (RExC_flags & PMf_MULTILINE)))) |
4128 | { | |
1182767e | 4129 | I32 t,ml; |
cf93c79d | 4130 | |
1de06328 YO |
4131 | /* copy the information about the longest fixed |
4132 | from the reg_scan_data over to the program. */ | |
33b8afdf JH |
4133 | if (SvUTF8(data.longest_fixed)) { |
4134 | r->anchored_utf8 = data.longest_fixed; | |
c445ea15 | 4135 | r->anchored_substr = NULL; |
33b8afdf JH |
4136 | } else { |
4137 | r->anchored_substr = data.longest_fixed; | |
c445ea15 | 4138 | r->anchored_utf8 = NULL; |
33b8afdf | 4139 | } |
1de06328 YO |
4140 | /* fixed_end_shift is how many chars that must be matched that |
4141 | follow this item. We calculate it ahead of time as once the | |
4142 | lookbehind offset is added in we lose the ability to correctly | |
4143 | calculate it.*/ | |
4144 | ml = data.minlen_fixed ? *(data.minlen_fixed) | |
1182767e | 4145 | : (I32)longest_fixed_length; |
1de06328 YO |
4146 | r->anchored_end_shift = ml - data.offset_fixed |
4147 | - longest_fixed_length + (SvTAIL(data.longest_fixed) != 0) | |
4148 | + data.lookbehind_fixed; | |
4149 | r->anchored_offset = data.offset_fixed - data.lookbehind_fixed; | |
4150 | ||
cf93c79d IZ |
4151 | t = (data.flags & SF_FIX_BEFORE_EOL /* Can't have SEOL and MULTI */ |
4152 | && (!(data.flags & SF_FIX_BEFORE_MEOL) | |
e2509266 | 4153 | || (RExC_flags & PMf_MULTILINE))); |
33b8afdf | 4154 | fbm_compile(data.longest_fixed, t ? FBMcf_TAIL : 0); |
a0ed51b3 LW |
4155 | } |
4156 | else { | |
c445ea15 | 4157 | r->anchored_substr = r->anchored_utf8 = NULL; |
c277df42 | 4158 | SvREFCNT_dec(data.longest_fixed); |
c5254dd6 | 4159 | longest_fixed_length = 0; |
a0d0e21e | 4160 | } |
b81d288d | 4161 | if (r->regstclass |
ffc61ed2 | 4162 | && (OP(r->regstclass) == REG_ANY || OP(r->regstclass) == SANY)) |
653099ff | 4163 | r->regstclass = NULL; |
33b8afdf JH |
4164 | if ((!(r->anchored_substr || r->anchored_utf8) || r->anchored_offset) |
4165 | && stclass_flag | |
653099ff | 4166 | && !(data.start_class->flags & ANYOF_EOS) |
eb160463 GS |
4167 | && !cl_is_anything(data.start_class)) |
4168 | { | |
1df70142 | 4169 | const I32 n = add_data(pRExC_state, 1, "f"); |
653099ff | 4170 | |
a02a5408 | 4171 | Newx(RExC_rx->data->data[n], 1, |
653099ff GS |
4172 | struct regnode_charclass_class); |
4173 | StructCopy(data.start_class, | |
830247a4 | 4174 | (struct regnode_charclass_class*)RExC_rx->data->data[n], |
653099ff | 4175 | struct regnode_charclass_class); |
830247a4 | 4176 | r->regstclass = (regnode*)RExC_rx->data->data[n]; |
653099ff | 4177 | r->reganch &= ~ROPT_SKIP; /* Used in find_byclass(). */ |
a3621e74 | 4178 | DEBUG_COMPILE_r({ SV *sv = sv_newmortal(); |
32fc9b6a | 4179 | regprop(r, sv, (regnode*)data.start_class); |
9c5ffd7c | 4180 | PerlIO_printf(Perl_debug_log, |
a0288114 | 4181 | "synthetic stclass \"%s\".\n", |
3f7c398e | 4182 | SvPVX_const(sv));}); |
653099ff | 4183 | } |
c277df42 IZ |
4184 | |
4185 | /* A temporary algorithm prefers floated substr to fixed one to dig more info. */ | |
c5254dd6 | 4186 | if (longest_fixed_length > longest_float_length) { |
1de06328 | 4187 | r->check_end_shift = r->anchored_end_shift; |
c277df42 | 4188 | r->check_substr = r->anchored_substr; |
33b8afdf | 4189 | r->check_utf8 = r->anchored_utf8; |
c277df42 IZ |
4190 | r->check_offset_min = r->check_offset_max = r->anchored_offset; |
4191 | if (r->reganch & ROPT_ANCH_SINGLE) | |
4192 | r->reganch |= ROPT_NOSCAN; | |
a0ed51b3 LW |
4193 | } |
4194 | else { | |
1de06328 | 4195 | r->check_end_shift = r->float_end_shift; |
c277df42 | 4196 | r->check_substr = r->float_substr; |
33b8afdf | 4197 | r->check_utf8 = r->float_utf8; |
1de06328 YO |
4198 | r->check_offset_min = r->float_min_offset; |
4199 | r->check_offset_max = r->float_max_offset; | |
a0d0e21e | 4200 | } |
30382c73 IZ |
4201 | /* XXXX Currently intuiting is not compatible with ANCH_GPOS. |
4202 | This should be changed ASAP! */ | |
33b8afdf | 4203 | if ((r->check_substr || r->check_utf8) && !(r->reganch & ROPT_ANCH_GPOS)) { |
cad2e5aa | 4204 | r->reganch |= RE_USE_INTUIT; |
33b8afdf | 4205 | if (SvTAIL(r->check_substr ? r->check_substr : r->check_utf8)) |
cad2e5aa JH |
4206 | r->reganch |= RE_INTUIT_TAIL; |
4207 | } | |
1de06328 YO |
4208 | /* XXX Unneeded? dmq (shouldn't as this is handled elsewhere) |
4209 | if ( (STRLEN)minlen < longest_float_length ) | |
4210 | minlen= longest_float_length; | |
4211 | if ( (STRLEN)minlen < longest_fixed_length ) | |
4212 | minlen= longest_fixed_length; | |
4213 | */ | |
a0ed51b3 LW |
4214 | } |
4215 | else { | |
c277df42 IZ |
4216 | /* Several toplevels. Best we can is to set minlen. */ |
4217 | I32 fake; | |
653099ff | 4218 | struct regnode_charclass_class ch_class; |
cb434fcc | 4219 | I32 last_close = 0; |
c277df42 | 4220 | |
a3621e74 | 4221 | DEBUG_COMPILE_r(PerlIO_printf(Perl_debug_log, "\n")); |
07be1b83 | 4222 | |
c277df42 | 4223 | scan = r->program + 1; |
830247a4 | 4224 | cl_init(pRExC_state, &ch_class); |
653099ff | 4225 | data.start_class = &ch_class; |
cb434fcc | 4226 | data.last_closep = &last_close; |
07be1b83 | 4227 | |
1de06328 | 4228 | minlen = study_chunk(pRExC_state, &scan, &minlen, &fake, scan + RExC_size, |
07be1b83 YO |
4229 | &data, SCF_DO_STCLASS_AND|SCF_WHILEM_VISITED_POS,0); |
4230 | ||
786e8c11 | 4231 | CHECK_RESTUDY_GOTO; |
07be1b83 | 4232 | |
33b8afdf | 4233 | r->check_substr = r->check_utf8 = r->anchored_substr = r->anchored_utf8 |
c445ea15 | 4234 | = r->float_substr = r->float_utf8 = NULL; |
653099ff | 4235 | if (!(data.start_class->flags & ANYOF_EOS) |
eb160463 GS |
4236 | && !cl_is_anything(data.start_class)) |
4237 | { | |
1df70142 | 4238 | const I32 n = add_data(pRExC_state, 1, "f"); |
653099ff | 4239 | |
a02a5408 | 4240 | Newx(RExC_rx->data->data[n], 1, |
653099ff GS |
4241 | struct regnode_charclass_class); |
4242 | StructCopy(data.start_class, | |
830247a4 | 4243 | (struct regnode_charclass_class*)RExC_rx->data->data[n], |
653099ff | 4244 | struct regnode_charclass_class); |
830247a4 | 4245 | r->regstclass = (regnode*)RExC_rx->data->data[n]; |
653099ff | 4246 | r->reganch &= ~ROPT_SKIP; /* Used in find_byclass(). */ |
a3621e74 | 4247 | DEBUG_COMPILE_r({ SV* sv = sv_newmortal(); |
32fc9b6a | 4248 | regprop(r, sv, (regnode*)data.start_class); |
9c5ffd7c | 4249 | PerlIO_printf(Perl_debug_log, |
a0288114 | 4250 | "synthetic stclass \"%s\".\n", |
3f7c398e | 4251 | SvPVX_const(sv));}); |
653099ff | 4252 | } |
a0d0e21e LW |
4253 | } |
4254 | ||
1de06328 YO |
4255 | /* Guard against an embedded (?=) or (?<=) with a longer minlen than |
4256 | the "real" pattern. */ | |
4257 | if (r->minlen < minlen) | |
4258 | r->minlen = minlen; | |
4259 | ||
b81d288d | 4260 | if (RExC_seen & REG_SEEN_GPOS) |
c277df42 | 4261 | r->reganch |= ROPT_GPOS_SEEN; |
830247a4 | 4262 | if (RExC_seen & REG_SEEN_LOOKBEHIND) |
c277df42 | 4263 | r->reganch |= ROPT_LOOKBEHIND_SEEN; |
830247a4 | 4264 | if (RExC_seen & REG_SEEN_EVAL) |
ce862d02 | 4265 | r->reganch |= ROPT_EVAL_SEEN; |
f33976b4 DB |
4266 | if (RExC_seen & REG_SEEN_CANY) |
4267 | r->reganch |= ROPT_CANY_SEEN; | |
81714fb9 YO |
4268 | if (RExC_paren_names) |
4269 | r->paren_names = (HV*)SvREFCNT_inc(RExC_paren_names); | |
4270 | else | |
4271 | r->paren_names = NULL; | |
4272 | ||
a02a5408 JC |
4273 | Newxz(r->startp, RExC_npar, I32); |
4274 | Newxz(r->endp, RExC_npar, I32); | |
f9f4320a | 4275 | |
f2278c82 | 4276 | DEBUG_r( RX_DEBUG_on(r) ); |
be8e71aa YO |
4277 | DEBUG_DUMP_r({ |
4278 | PerlIO_printf(Perl_debug_log,"Final program:\n"); | |
3dab1dad YO |
4279 | regdump(r); |
4280 | }); | |
8e9a8a48 YO |
4281 | DEBUG_OFFSETS_r(if (r->offsets) { |
4282 | const U32 len = r->offsets[0]; | |
4283 | U32 i; | |
4284 | GET_RE_DEBUG_FLAGS_DECL; | |
4285 | PerlIO_printf(Perl_debug_log, "Offsets: [%"UVuf"]\n\t", (UV)r->offsets[0]); | |
4286 | for (i = 1; i <= len; i++) { | |
4287 | if (r->offsets[i*2-1] || r->offsets[i*2]) | |
4288 | PerlIO_printf(Perl_debug_log, "%"UVuf":%"UVuf"[%"UVuf"] ", | |
786e8c11 | 4289 | (UV)i, (UV)r->offsets[i*2-1], (UV)r->offsets[i*2]); |
8e9a8a48 YO |
4290 | } |
4291 | PerlIO_printf(Perl_debug_log, "\n"); | |
4292 | }); | |
a0d0e21e | 4293 | return(r); |
f9f4320a | 4294 | END_BLOCK |
a687059c LW |
4295 | } |
4296 | ||
f9f4320a YO |
4297 | #undef CORE_ONLY_BLOCK |
4298 | #undef END_BLOCK | |
4299 | #undef RE_ENGINE_PTR | |
3dab1dad | 4300 | |
9af228c6 | 4301 | #ifndef PERL_IN_XSUB_RE |
81714fb9 YO |
4302 | SV* |
4303 | Perl_reg_named_buff_sv(pTHX_ SV* namesv) | |
4304 | { | |
4305 | I32 parno = 0; /* no match */ | |
4306 | if (PL_curpm) { | |
4307 | const REGEXP * const rx = PM_GETRE(PL_curpm); | |
4308 | if (rx && rx->paren_names) { | |
4309 | HE *he_str = hv_fetch_ent( rx->paren_names, namesv, 0, 0 ); | |
4310 | if (he_str) { | |
4311 | IV i; | |
4312 | SV* sv_dat=HeVAL(he_str); | |
4313 | I32 *nums=(I32*)SvPVX(sv_dat); | |
4314 | for ( i=0; i<SvIVX(sv_dat); i++ ) { | |
0a4db386 | 4315 | if ((I32)(rx->lastparen) >= nums[i] && |
81714fb9 YO |
4316 | rx->endp[nums[i]] != -1) |
4317 | { | |
4318 | parno = nums[i]; | |
4319 | break; | |
4320 | } | |
4321 | } | |
4322 | } | |
4323 | } | |
4324 | } | |
4325 | if ( !parno ) { | |
4326 | return 0; | |
4327 | } else { | |
4328 | GV *gv_paren; | |
4329 | SV *sv= sv_newmortal(); | |
4330 | Perl_sv_setpvf(aTHX_ sv, "%"IVdf,(IV)parno); | |
4331 | gv_paren= Perl_gv_fetchsv(aTHX_ sv, GV_ADD, SVt_PVGV); | |
4332 | return GvSVn(gv_paren); | |
4333 | } | |
4334 | } | |
9af228c6 | 4335 | #endif |
0a4db386 | 4336 | |
894be9b7 | 4337 | /* Scans the name of a named buffer from the pattern. |
0a4db386 YO |
4338 | * If flags is REG_RSN_RETURN_NULL returns null. |
4339 | * If flags is REG_RSN_RETURN_NAME returns an SV* containing the name | |
4340 | * If flags is REG_RSN_RETURN_DATA returns the data SV* corresponding | |
4341 | * to the parsed name as looked up in the RExC_paren_names hash. | |
4342 | * If there is an error throws a vFAIL().. type exception. | |
894be9b7 | 4343 | */ |
0a4db386 YO |
4344 | |
4345 | #define REG_RSN_RETURN_NULL 0 | |
4346 | #define REG_RSN_RETURN_NAME 1 | |
4347 | #define REG_RSN_RETURN_DATA 2 | |
4348 | ||
894be9b7 YO |
4349 | STATIC SV* |
4350 | S_reg_scan_name(pTHX_ RExC_state_t *pRExC_state, U32 flags) { | |
4351 | char *name_start = RExC_parse; | |
0a4db386 | 4352 | if ( UTF ) { |
894be9b7 | 4353 | STRLEN numlen; |
0a4db386 YO |
4354 | while( isIDFIRST_uni(utf8n_to_uvchr((U8*)RExC_parse, |
4355 | RExC_end - RExC_parse, &numlen, UTF8_ALLOW_DEFAULT))) | |
4356 | { | |
4357 | RExC_parse += numlen; | |
4358 | } | |
4359 | } else { | |
4360 | while( isIDFIRST(*RExC_parse) ) | |
894be9b7 YO |
4361 | RExC_parse++; |
4362 | } | |
0a4db386 YO |
4363 | if ( flags ) { |
4364 | SV* sv_name = sv_2mortal(Perl_newSVpvn(aTHX_ name_start, | |
4365 | (int)(RExC_parse - name_start))); | |
894be9b7 | 4366 | if (UTF) |
0a4db386 YO |
4367 | SvUTF8_on(sv_name); |
4368 | if ( flags == REG_RSN_RETURN_NAME) | |
4369 | return sv_name; | |
4370 | else if (flags==REG_RSN_RETURN_DATA) { | |
4371 | HE *he_str = NULL; | |
4372 | SV *sv_dat = NULL; | |
4373 | if ( ! sv_name ) /* should not happen*/ | |
4374 | Perl_croak(aTHX_ "panic: no svname in reg_scan_name"); | |
4375 | if (RExC_paren_names) | |
4376 | he_str = hv_fetch_ent( RExC_paren_names, sv_name, 0, 0 ); | |
4377 | if ( he_str ) | |
4378 | sv_dat = HeVAL(he_str); | |
4379 | if ( ! sv_dat ) | |
4380 | vFAIL("Reference to nonexistent named group"); | |
4381 | return sv_dat; | |
4382 | } | |
4383 | else { | |
4384 | Perl_croak(aTHX_ "panic: bad flag in reg_scan_name"); | |
4385 | } | |
4386 | /* NOT REACHED */ | |
894be9b7 | 4387 | } |
0a4db386 | 4388 | return NULL; |
894be9b7 YO |
4389 | } |
4390 | ||
3dab1dad YO |
4391 | #define DEBUG_PARSE_MSG(funcname) DEBUG_PARSE_r({ \ |
4392 | int rem=(int)(RExC_end - RExC_parse); \ | |
4393 | int cut; \ | |
4394 | int num; \ | |
4395 | int iscut=0; \ | |
4396 | if (rem>10) { \ | |
4397 | rem=10; \ | |
4398 | iscut=1; \ | |
4399 | } \ | |
4400 | cut=10-rem; \ | |
4401 | if (RExC_lastparse!=RExC_parse) \ | |
4402 | PerlIO_printf(Perl_debug_log," >%.*s%-*s", \ | |
4403 | rem, RExC_parse, \ | |
4404 | cut + 4, \ | |
4405 | iscut ? "..." : "<" \ | |
4406 | ); \ | |
4407 | else \ | |
4408 | PerlIO_printf(Perl_debug_log,"%16s",""); \ | |
4409 | \ | |
4410 | if (SIZE_ONLY) \ | |
4411 | num=RExC_size; \ | |
4412 | else \ | |
4413 | num=REG_NODE_NUM(RExC_emit); \ | |
4414 | if (RExC_lastnum!=num) \ | |
0a4db386 | 4415 | PerlIO_printf(Perl_debug_log,"|%4d",num); \ |
3dab1dad | 4416 | else \ |
0a4db386 | 4417 | PerlIO_printf(Perl_debug_log,"|%4s",""); \ |
be8e71aa YO |
4418 | PerlIO_printf(Perl_debug_log,"|%*s%-4s", \ |
4419 | (int)((depth*2)), "", \ | |
3dab1dad YO |
4420 | (funcname) \ |
4421 | ); \ | |
4422 | RExC_lastnum=num; \ | |
4423 | RExC_lastparse=RExC_parse; \ | |
4424 | }) | |
4425 | ||
07be1b83 YO |
4426 | |
4427 | ||
3dab1dad YO |
4428 | #define DEBUG_PARSE(funcname) DEBUG_PARSE_r({ \ |
4429 | DEBUG_PARSE_MSG((funcname)); \ | |
4430 | PerlIO_printf(Perl_debug_log,"%4s","\n"); \ | |
4431 | }) | |
6bda09f9 YO |
4432 | #define DEBUG_PARSE_FMT(funcname,fmt,args) DEBUG_PARSE_r({ \ |
4433 | DEBUG_PARSE_MSG((funcname)); \ | |
4434 | PerlIO_printf(Perl_debug_log,fmt "\n",args); \ | |
4435 | }) | |
a687059c LW |
4436 | /* |
4437 | - reg - regular expression, i.e. main body or parenthesized thing | |
4438 | * | |
4439 | * Caller must absorb opening parenthesis. | |
4440 | * | |
4441 | * Combining parenthesis handling with the base level of regular expression | |
4442 | * is a trifle forced, but the need to tie the tails of the branches to what | |
4443 | * follows makes it hard to avoid. | |
4444 | */ | |
07be1b83 YO |
4445 | #define REGTAIL(x,y,z) regtail((x),(y),(z),depth+1) |
4446 | #ifdef DEBUGGING | |
4447 | #define REGTAIL_STUDY(x,y,z) regtail_study((x),(y),(z),depth+1) | |
4448 | #else | |
4449 | #define REGTAIL_STUDY(x,y,z) regtail((x),(y),(z),depth+1) | |
4450 | #endif | |
3dab1dad | 4451 | |
76e3520e | 4452 | STATIC regnode * |
3dab1dad | 4453 | S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp,U32 depth) |
c277df42 | 4454 | /* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */ |
a687059c | 4455 | { |
27da23d5 | 4456 | dVAR; |
c277df42 IZ |
4457 | register regnode *ret; /* Will be the head of the group. */ |
4458 | register regnode *br; | |
4459 | register regnode *lastbr; | |
cbbf8932 | 4460 | register regnode *ender = NULL; |
a0d0e21e | 4461 | register I32 parno = 0; |
cbbf8932 AL |
4462 | I32 flags; |
4463 | const I32 oregflags = RExC_flags; | |
6136c704 AL |
4464 | bool have_branch = 0; |
4465 | bool is_open = 0; | |
9d1d55b5 JP |
4466 | |
4467 | /* for (?g), (?gc), and (?o) warnings; warning | |
4468 | about (?c) will warn about (?g) -- japhy */ | |
4469 | ||
6136c704 AL |
4470 | #define WASTED_O 0x01 |
4471 | #define WASTED_G 0x02 | |
4472 | #define WASTED_C 0x04 | |
4473 | #define WASTED_GC (0x02|0x04) | |
cbbf8932 | 4474 | I32 wastedflags = 0x00; |
9d1d55b5 | 4475 | |
fac92740 | 4476 | char * parse_start = RExC_parse; /* MJD */ |
a28509cc | 4477 | char * const oregcomp_parse = RExC_parse; |
a0d0e21e | 4478 | |
3dab1dad YO |
4479 | GET_RE_DEBUG_FLAGS_DECL; |
4480 | DEBUG_PARSE("reg "); | |
4481 | ||
4482 | ||
821b33a5 | 4483 | *flagp = 0; /* Tentatively. */ |
a0d0e21e | 4484 | |
9d1d55b5 | 4485 | |
a0d0e21e LW |
4486 | /* Make an OPEN node, if parenthesized. */ |
4487 | if (paren) { | |
fac92740 | 4488 | if (*RExC_parse == '?') { /* (?...) */ |
2b36a5a0 JH |
4489 | U32 posflags = 0, negflags = 0; |
4490 | U32 *flagsp = &posflags; | |
6136c704 | 4491 | bool is_logical = 0; |
a28509cc | 4492 | const char * const seqstart = RExC_parse; |
ca9dfc88 | 4493 | |
830247a4 IZ |
4494 | RExC_parse++; |
4495 | paren = *RExC_parse++; | |
c277df42 | 4496 | ret = NULL; /* For look-ahead/behind. */ |
a0d0e21e | 4497 | switch (paren) { |
894be9b7 | 4498 | |
fac92740 | 4499 | case '<': /* (?<...) */ |
b81d288d | 4500 | if (*RExC_parse == '!') |
c277df42 | 4501 | paren = ','; |
0a4db386 YO |
4502 | else if (*RExC_parse != '=') |
4503 | { /* (?<...>) */ | |
81714fb9 | 4504 | char *name_start; |
894be9b7 | 4505 | SV *svname; |
81714fb9 YO |
4506 | paren= '>'; |
4507 | case '\'': /* (?'...') */ | |
4508 | name_start= RExC_parse; | |
0a4db386 YO |
4509 | svname = reg_scan_name(pRExC_state, |
4510 | SIZE_ONLY ? /* reverse test from the others */ | |
4511 | REG_RSN_RETURN_NAME : | |
4512 | REG_RSN_RETURN_NULL); | |
81714fb9 YO |
4513 | if (RExC_parse == name_start) |
4514 | goto unknown; | |
4515 | if (*RExC_parse != paren) | |
4516 | vFAIL2("Sequence (?%c... not terminated", | |
4517 | paren=='>' ? '<' : paren); | |
4518 | if (SIZE_ONLY) { | |
e62cc96a YO |
4519 | HE *he_str; |
4520 | SV *sv_dat = NULL; | |
894be9b7 YO |
4521 | if (!svname) /* shouldnt happen */ |
4522 | Perl_croak(aTHX_ | |
4523 | "panic: reg_scan_name returned NULL"); | |
81714fb9 YO |
4524 | if (!RExC_paren_names) { |
4525 | RExC_paren_names= newHV(); | |
4526 | sv_2mortal((SV*)RExC_paren_names); | |
4527 | } | |
4528 | he_str = hv_fetch_ent( RExC_paren_names, svname, 1, 0 ); | |
e62cc96a | 4529 | if ( he_str ) |
81714fb9 | 4530 | sv_dat = HeVAL(he_str); |
e62cc96a | 4531 | if ( ! sv_dat ) { |
81714fb9 | 4532 | /* croak baby croak */ |
e62cc96a YO |
4533 | Perl_croak(aTHX_ |
4534 | "panic: paren_name hash element allocation failed"); | |
4535 | } else if ( SvPOK(sv_dat) ) { | |
81714fb9 YO |
4536 | IV count=SvIV(sv_dat); |
4537 | I32 *pv=(I32*)SvGROW(sv_dat,SvCUR(sv_dat)+sizeof(I32)+1); | |
4538 | SvCUR_set(sv_dat,SvCUR(sv_dat)+sizeof(I32)); | |
4539 | pv[count]=RExC_npar; | |
4540 | SvIVX(sv_dat)++; | |
4541 | } else { | |
4542 | (void)SvUPGRADE(sv_dat,SVt_PVNV); | |
4543 | sv_setpvn(sv_dat, (char *)&(RExC_npar), sizeof(I32)); | |
4544 | SvIOK_on(sv_dat); | |
4545 | SvIVX(sv_dat)= 1; | |
e62cc96a YO |
4546 | } |
4547 | ||
81714fb9 YO |
4548 | /*sv_dump(sv_dat);*/ |
4549 | } | |
4550 | nextchar(pRExC_state); | |
4551 | paren = 1; | |
4552 | goto capturing_parens; | |
4553 | } | |
4554 | RExC_seen |= REG_SEEN_LOOKBEHIND; | |
830247a4 | 4555 | RExC_parse++; |
fac92740 MJD |
4556 | case '=': /* (?=...) */ |
4557 | case '!': /* (?!...) */ | |
830247a4 | 4558 | RExC_seen_zerolen++; |
fac92740 MJD |
4559 | case ':': /* (?:...) */ |
4560 | case '>': /* (?>...) */ | |
a0d0e21e | 4561 | break; |
fac92740 MJD |
4562 | case '$': /* (?$...) */ |
4563 | case '@': /* (?@...) */ | |
8615cb43 | 4564 | vFAIL2("Sequence (?%c...) not implemented", (int)paren); |
a0d0e21e | 4565 | break; |
fac92740 | 4566 | case '#': /* (?#...) */ |
830247a4 IZ |
4567 | while (*RExC_parse && *RExC_parse != ')') |
4568 | RExC_parse++; | |
4569 | if (*RExC_parse != ')') | |
c277df42 | 4570 | FAIL("Sequence (?#... not terminated"); |
830247a4 | 4571 | nextchar(pRExC_state); |
a0d0e21e LW |
4572 | *flagp = TRYAGAIN; |
4573 | return NULL; | |
894be9b7 YO |
4574 | case '0' : /* (?0) */ |
4575 | case 'R' : /* (?R) */ | |
4576 | if (*RExC_parse != ')') | |
6bda09f9 YO |
4577 | FAIL("Sequence (?R) not terminated"); |
4578 | reg_node(pRExC_state, SRECURSE); | |
894be9b7 YO |
4579 | break; /* (?PARNO) */ |
4580 | { /* named and numeric backreferences */ | |
4581 | I32 num; | |
4582 | char * parse_start; | |
4583 | case '&': /* (?&NAME) */ | |
4584 | parse_start = RExC_parse - 1; | |
4585 | { | |
0a4db386 YO |
4586 | SV *sv_dat = reg_scan_name(pRExC_state, |
4587 | SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA); | |
4588 | num = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0; | |
894be9b7 YO |
4589 | } |
4590 | goto gen_recurse_regop; | |
4591 | /* NOT REACHED */ | |
6bda09f9 YO |
4592 | case '1': case '2': case '3': case '4': /* (?1) */ |
4593 | case '5': case '6': case '7': case '8': case '9': | |
4594 | RExC_parse--; | |
894be9b7 YO |
4595 | num = atoi(RExC_parse); |
4596 | parse_start = RExC_parse - 1; /* MJD */ | |
6bda09f9 YO |
4597 | while (isDIGIT(*RExC_parse)) |
4598 | RExC_parse++; | |
4599 | if (*RExC_parse!=')') | |
4600 | vFAIL("Expecting close bracket"); | |
894be9b7 YO |
4601 | |
4602 | gen_recurse_regop: | |
6bda09f9 YO |
4603 | ret = reganode(pRExC_state, RECURSE, num); |
4604 | if (!SIZE_ONLY) { | |
4605 | if (num > (I32)RExC_rx->nparens) { | |
4606 | RExC_parse++; | |
4607 | vFAIL("Reference to nonexistent group"); | |
4608 | } | |
4609 | ARG2L_SET( ret, 0); | |
4610 | RExC_emit++; | |
226de585 | 4611 | DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log, |
acff02b8 | 4612 | "Recurse #%"UVuf" to %"IVdf"\n", (UV)ARG(ret), (IV)ARG2L(ret))); |
894be9b7 | 4613 | } else { |
6bda09f9 | 4614 | RExC_size++; |
6bda09f9 | 4615 | } |
0a4db386 | 4616 | RExC_seen |= REG_SEEN_RECURSE; |
6bda09f9 | 4617 | Set_Node_Length(ret, 1 + regarglen[OP(ret)]); /* MJD */ |
58663417 RGS |
4618 | Set_Node_Offset(ret, parse_start); /* MJD */ |
4619 | ||
6bda09f9 YO |
4620 | nextchar(pRExC_state); |
4621 | return ret; | |
894be9b7 YO |
4622 | } /* named and numeric backreferences */ |
4623 | /* NOT REACHED */ | |
4624 | ||
fac92740 | 4625 | case 'p': /* (?p...) */ |
9014280d | 4626 | if (SIZE_ONLY && ckWARN2(WARN_DEPRECATED, WARN_REGEXP)) |
f9373011 | 4627 | vWARNdep(RExC_parse, "(?p{}) is deprecated - use (??{})"); |
8c8ad484 | 4628 | /* FALL THROUGH*/ |
fac92740 | 4629 | case '?': /* (??...) */ |
6136c704 | 4630 | is_logical = 1; |
438a3801 YST |
4631 | if (*RExC_parse != '{') |
4632 | goto unknown; | |
830247a4 | 4633 | paren = *RExC_parse++; |
0f5d15d6 | 4634 | /* FALL THROUGH */ |
fac92740 | 4635 | case '{': /* (?{...}) */ |
c277df42 | 4636 | { |
c277df42 IZ |
4637 | I32 count = 1, n = 0; |
4638 | char c; | |
830247a4 | 4639 | char *s = RExC_parse; |
c277df42 | 4640 | |
830247a4 IZ |
4641 | RExC_seen_zerolen++; |
4642 | RExC_seen |= REG_SEEN_EVAL; | |
4643 | while (count && (c = *RExC_parse)) { | |
6136c704 AL |
4644 | if (c == '\\') { |
4645 | if (RExC_parse[1]) | |
4646 | RExC_parse++; | |
4647 | } | |
b81d288d | 4648 | else if (c == '{') |
c277df42 | 4649 | count++; |
b81d288d | 4650 | else if (c == '}') |
c277df42 | 4651 | count--; |
830247a4 | 4652 | RExC_parse++; |
c277df42 | 4653 | } |
6136c704 | 4654 | if (*RExC_parse != ')') { |
b81d288d | 4655 | RExC_parse = s; |
b45f050a JF |
4656 | vFAIL("Sequence (?{...}) not terminated or not {}-balanced"); |
4657 | } | |
c277df42 | 4658 | if (!SIZE_ONLY) { |
f3548bdc | 4659 | PAD *pad; |
6136c704 AL |
4660 | OP_4tree *sop, *rop; |
4661 | SV * const sv = newSVpvn(s, RExC_parse - 1 - s); | |
c277df42 | 4662 | |
569233ed SB |
4663 | ENTER; |
4664 | Perl_save_re_context(aTHX); | |
f3548bdc | 4665 | rop = sv_compile_2op(sv, &sop, "re", &pad); |
9b978d73 DM |
4666 | sop->op_private |= OPpREFCOUNTED; |
4667 | /* re_dup will OpREFCNT_inc */ | |
4668 | OpREFCNT_set(sop, 1); | |
569233ed | 4669 | LEAVE; |
c277df42 | 4670 | |
830247a4 IZ |
4671 | n = add_data(pRExC_state, 3, "nop"); |
4672 | RExC_rx->data->data[n] = (void*)rop; | |
4673 | RExC_rx->data->data[n+1] = (void*)sop; | |
f3548bdc | 4674 | RExC_rx->data->data[n+2] = (void*)pad; |
c277df42 | 4675 | SvREFCNT_dec(sv); |
a0ed51b3 | 4676 | } |
e24b16f9 | 4677 | else { /* First pass */ |
830247a4 | 4678 | if (PL_reginterp_cnt < ++RExC_seen_evals |
923e4eb5 | 4679 | && IN_PERL_RUNTIME) |
2cd61cdb IZ |
4680 | /* No compiled RE interpolated, has runtime |
4681 | components ===> unsafe. */ | |
4682 | FAIL("Eval-group not allowed at runtime, use re 'eval'"); | |
5b61d3f7 | 4683 | if (PL_tainting && PL_tainted) |
cc6b7395 | 4684 | FAIL("Eval-group in insecure regular expression"); |
54df2634 | 4685 | #if PERL_VERSION > 8 |
923e4eb5 | 4686 | if (IN_PERL_COMPILETIME) |
b5c19bd7 | 4687 | PL_cv_has_eval = 1; |
54df2634 | 4688 | #endif |
c277df42 | 4689 | } |
b5c19bd7 | 4690 | |
830247a4 | 4691 | nextchar(pRExC_state); |
6136c704 | 4692 | if (is_logical) { |
830247a4 | 4693 | ret = reg_node(pRExC_state, LOGICAL); |
0f5d15d6 IZ |
4694 | if (!SIZE_ONLY) |
4695 | ret->flags = 2; | |
3dab1dad | 4696 | REGTAIL(pRExC_state, ret, reganode(pRExC_state, EVAL, n)); |
fac92740 | 4697 | /* deal with the length of this later - MJD */ |
0f5d15d6 IZ |
4698 | return ret; |
4699 | } | |
ccb2c380 MP |
4700 | ret = reganode(pRExC_state, EVAL, n); |
4701 | Set_Node_Length(ret, RExC_parse - parse_start + 1); | |
4702 | Set_Node_Offset(ret, parse_start); | |
4703 | return ret; | |
c277df42 | 4704 | } |
fac92740 | 4705 | case '(': /* (?(?{...})...) and (?(?=...)...) */ |
c277df42 | 4706 | { |
0a4db386 | 4707 | int is_define= 0; |
fac92740 | 4708 | if (RExC_parse[0] == '?') { /* (?(?...)) */ |
b81d288d AB |
4709 | if (RExC_parse[1] == '=' || RExC_parse[1] == '!' |
4710 | || RExC_parse[1] == '<' | |
830247a4 | 4711 | || RExC_parse[1] == '{') { /* Lookahead or eval. */ |
c277df42 IZ |
4712 | I32 flag; |
4713 | ||
830247a4 | 4714 | ret = reg_node(pRExC_state, LOGICAL); |
0f5d15d6 IZ |
4715 | if (!SIZE_ONLY) |
4716 | ret->flags = 1; | |
3dab1dad | 4717 | REGTAIL(pRExC_state, ret, reg(pRExC_state, 1, &flag,depth+1)); |
c277df42 | 4718 | goto insert_if; |
b81d288d | 4719 | } |
a0ed51b3 | 4720 | } |
0a4db386 YO |
4721 | else if ( RExC_parse[0] == '<' /* (?(<NAME>)...) */ |
4722 | || RExC_parse[0] == '\'' ) /* (?('NAME')...) */ | |
4723 | { | |
4724 | char ch = RExC_parse[0] == '<' ? '>' : '\''; | |
4725 | char *name_start= RExC_parse++; | |
4726 | I32 num = 0; | |
4727 | SV *sv_dat=reg_scan_name(pRExC_state, | |
4728 | SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA); | |
4729 | if (RExC_parse == name_start || *RExC_parse != ch) | |
4730 | vFAIL2("Sequence (?(%c... not terminated", | |
4731 | (ch == '>' ? '<' : ch)); | |
4732 | RExC_parse++; | |
4733 | if (!SIZE_ONLY) { | |
4734 | num = add_data( pRExC_state, 1, "S" ); | |
4735 | RExC_rx->data->data[num]=(void*)sv_dat; | |
4736 | SvREFCNT_inc(sv_dat); | |
4737 | } | |
4738 | ret = reganode(pRExC_state,NGROUPP,num); | |
4739 | goto insert_if_check_paren; | |
4740 | } | |
4741 | else if (RExC_parse[0] == 'D' && | |
4742 | RExC_parse[1] == 'E' && | |
4743 | RExC_parse[2] == 'F' && | |
4744 | RExC_parse[3] == 'I' && | |
4745 | RExC_parse[4] == 'N' && | |
4746 | RExC_parse[5] == 'E') | |
4747 | { | |
4748 | ret = reganode(pRExC_state,DEFINEP,0); | |
4749 | RExC_parse +=6 ; | |
4750 | is_define = 1; | |
4751 | goto insert_if_check_paren; | |
4752 | } | |
4753 | else if (RExC_parse[0] == 'R') { | |
4754 | RExC_parse++; | |
4755 | parno = 0; | |
4756 | if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) { | |
4757 | parno = atoi(RExC_parse++); | |
4758 | while (isDIGIT(*RExC_parse)) | |
4759 | RExC_parse++; | |
4760 | } else if (RExC_parse[0] == '&') { | |
4761 | SV *sv_dat; | |
4762 | RExC_parse++; | |
4763 | sv_dat = reg_scan_name(pRExC_state, | |
4764 | SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA); | |
4765 | parno = sv_dat ? *((I32 *)SvPVX(sv_dat)) : 0; | |
4766 | } | |
4767 | ret = reganode(pRExC_state,RECURSEP,parno); | |
4768 | goto insert_if_check_paren; | |
4769 | } | |
830247a4 | 4770 | else if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) { |
fac92740 | 4771 | /* (?(1)...) */ |
6136c704 | 4772 | char c; |
830247a4 | 4773 | parno = atoi(RExC_parse++); |
c277df42 | 4774 | |
830247a4 IZ |
4775 | while (isDIGIT(*RExC_parse)) |
4776 | RExC_parse++; | |
fac92740 | 4777 | ret = reganode(pRExC_state, GROUPP, parno); |
2af232bd | 4778 | |
0a4db386 | 4779 | insert_if_check_paren: |
830247a4 | 4780 | if ((c = *nextchar(pRExC_state)) != ')') |
b45f050a | 4781 | vFAIL("Switch condition not recognized"); |
c277df42 | 4782 | insert_if: |
3dab1dad YO |
4783 | REGTAIL(pRExC_state, ret, reganode(pRExC_state, IFTHEN, 0)); |
4784 | br = regbranch(pRExC_state, &flags, 1,depth+1); | |
c277df42 | 4785 | if (br == NULL) |
830247a4 | 4786 | br = reganode(pRExC_state, LONGJMP, 0); |
c277df42 | 4787 | else |
3dab1dad | 4788 | REGTAIL(pRExC_state, br, reganode(pRExC_state, LONGJMP, 0)); |
830247a4 | 4789 | c = *nextchar(pRExC_state); |
d1b80229 IZ |
4790 | if (flags&HASWIDTH) |
4791 | *flagp |= HASWIDTH; | |
c277df42 | 4792 | if (c == '|') { |
0a4db386 YO |
4793 | if (is_define) |
4794 | vFAIL("(?(DEFINE)....) does not allow branches"); | |
830247a4 | 4795 | lastbr = reganode(pRExC_state, IFTHEN, 0); /* Fake one for optimizer. */ |
3dab1dad YO |
4796 | regbranch(pRExC_state, &flags, 1,depth+1); |
4797 | REGTAIL(pRExC_state, ret, lastbr); | |
d1b80229 IZ |
4798 | if (flags&HASWIDTH) |
4799 | *flagp |= HASWIDTH; | |
830247a4 | 4800 | c = *nextchar(pRExC_state); |
a0ed51b3 LW |
4801 | } |
4802 | else | |
c277df42 IZ |
4803 | lastbr = NULL; |
4804 | if (c != ')') | |
8615cb43 | 4805 | vFAIL("Switch (?(condition)... contains too many branches"); |
830247a4 | 4806 | ender = reg_node(pRExC_state, TAIL); |
3dab1dad | 4807 | REGTAIL(pRExC_state, br, ender); |
c277df42 | 4808 | if (lastbr) { |
3dab1dad YO |
4809 | REGTAIL(pRExC_state, lastbr, ender); |
4810 | REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); | |
a0ed51b3 LW |
4811 | } |
4812 | else | |
3dab1dad | 4813 | REGTAIL(pRExC_state, ret, ender); |
c277df42 | 4814 | return ret; |
a0ed51b3 LW |
4815 | } |
4816 | else { | |
830247a4 | 4817 | vFAIL2("Unknown switch condition (?(%.2s", RExC_parse); |
c277df42 IZ |
4818 | } |
4819 | } | |
1b1626e4 | 4820 | case 0: |
830247a4 | 4821 | RExC_parse--; /* for vFAIL to print correctly */ |
8615cb43 | 4822 | vFAIL("Sequence (? incomplete"); |
1b1626e4 | 4823 | break; |
a0d0e21e | 4824 | default: |
830247a4 | 4825 | --RExC_parse; |
fac92740 | 4826 | parse_flags: /* (?i) */ |
830247a4 | 4827 | while (*RExC_parse && strchr("iogcmsx", *RExC_parse)) { |
9d1d55b5 JP |
4828 | /* (?g), (?gc) and (?o) are useless here |
4829 | and must be globally applied -- japhy */ | |
4830 | ||
4831 | if (*RExC_parse == 'o' || *RExC_parse == 'g') { | |
4832 | if (SIZE_ONLY && ckWARN(WARN_REGEXP)) { | |
6136c704 | 4833 | const I32 wflagbit = *RExC_parse == 'o' ? WASTED_O : WASTED_G; |
9d1d55b5 JP |
4834 | if (! (wastedflags & wflagbit) ) { |
4835 | wastedflags |= wflagbit; | |
4836 | vWARN5( | |
4837 | RExC_parse + 1, | |
4838 | "Useless (%s%c) - %suse /%c modifier", | |
4839 | flagsp == &negflags ? "?-" : "?", | |
4840 | *RExC_parse, | |
4841 | flagsp == &negflags ? "don't " : "", | |
4842 | *RExC_parse | |
4843 | ); | |
4844 | } | |
4845 | } | |
4846 | } | |
4847 | else if (*RExC_parse == 'c') { | |
4848 | if (SIZE_ONLY && ckWARN(WARN_REGEXP)) { | |
6136c704 AL |
4849 | if (! (wastedflags & WASTED_C) ) { |
4850 | wastedflags |= WASTED_GC; | |
9d1d55b5 JP |
4851 | vWARN3( |
4852 | RExC_parse + 1, | |
4853 | "Useless (%sc) - %suse /gc modifier", | |
4854 | flagsp == &negflags ? "?-" : "?", | |
4855 | flagsp == &negflags ? "don't " : "" | |
4856 | ); | |
4857 | } | |
4858 | } | |
4859 | } | |
4860 | else { pmflag(flagsp, *RExC_parse); } | |
4861 | ||
830247a4 | 4862 | ++RExC_parse; |
ca9dfc88 | 4863 | } |
830247a4 | 4864 | if (*RExC_parse == '-') { |
ca9dfc88 | 4865 | flagsp = &negflags; |
9d1d55b5 | 4866 | wastedflags = 0; /* reset so (?g-c) warns twice */ |
830247a4 | 4867 | ++RExC_parse; |
ca9dfc88 | 4868 | goto parse_flags; |
48c036b1 | 4869 | } |
e2509266 JH |
4870 | RExC_flags |= posflags; |
4871 | RExC_flags &= ~negflags; | |
830247a4 IZ |
4872 | if (*RExC_parse == ':') { |
4873 | RExC_parse++; | |
ca9dfc88 IZ |
4874 | paren = ':'; |
4875 | break; | |
4876 | } | |
c277df42 | 4877 | unknown: |
830247a4 IZ |
4878 | if (*RExC_parse != ')') { |
4879 | RExC_parse++; | |
4880 | vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart); | |
b45f050a | 4881 | } |
830247a4 | 4882 | nextchar(pRExC_state); |
a0d0e21e LW |
4883 | *flagp = TRYAGAIN; |
4884 | return NULL; | |
4885 | } | |
4886 | } | |
fac92740 | 4887 | else { /* (...) */ |
81714fb9 | 4888 | capturing_parens: |
830247a4 IZ |
4889 | parno = RExC_npar; |
4890 | RExC_npar++; | |
4891 | ret = reganode(pRExC_state, OPEN, parno); | |
6bda09f9 | 4892 | if (!SIZE_ONLY && RExC_seen & REG_SEEN_RECURSE) { |
226de585 | 4893 | DEBUG_OPTIMISE_MORE_r(PerlIO_printf(Perl_debug_log, |
acff02b8 | 4894 | "Setting paren #%"IVdf" to %d\n", (IV)parno, REG_NODE_NUM(ret))); |
6bda09f9 | 4895 | RExC_parens[parno-1]= ret; |
226de585 | 4896 | |
6bda09f9 | 4897 | } |
fac92740 MJD |
4898 | Set_Node_Length(ret, 1); /* MJD */ |
4899 | Set_Node_Offset(ret, RExC_parse); /* MJD */ | |
6136c704 | 4900 | is_open = 1; |
a0d0e21e | 4901 | } |
a0ed51b3 | 4902 | } |
fac92740 | 4903 | else /* ! paren */ |
a0d0e21e LW |
4904 | ret = NULL; |
4905 | ||
4906 | /* Pick up the branches, linking them together. */ | |
fac92740 | 4907 | parse_start = RExC_parse; /* MJD */ |
3dab1dad | 4908 | br = regbranch(pRExC_state, &flags, 1,depth+1); |
fac92740 | 4909 | /* branch_len = (paren != 0); */ |
2af232bd | 4910 | |
a0d0e21e LW |
4911 | if (br == NULL) |
4912 | return(NULL); | |
830247a4 IZ |
4913 | if (*RExC_parse == '|') { |
4914 | if (!SIZE_ONLY && RExC_extralen) { | |
6bda09f9 | 4915 | reginsert(pRExC_state, BRANCHJ, br, depth+1); |
a0ed51b3 | 4916 | } |
fac92740 | 4917 | else { /* MJD */ |
6bda09f9 | 4918 | reginsert(pRExC_state, BRANCH, br, depth+1); |
fac92740 MJD |
4919 | Set_Node_Length(br, paren != 0); |
4920 | Set_Node_Offset_To_R(br-RExC_emit_start, parse_start-RExC_start); | |
4921 | } | |
c277df42 IZ |
4922 | have_branch = 1; |
4923 | if (SIZE_ONLY) | |
830247a4 | 4924 | RExC_extralen += 1; /* For BRANCHJ-BRANCH. */ |
a0ed51b3 LW |
4925 | } |
4926 | else if (paren == ':') { | |
c277df42 IZ |
4927 | *flagp |= flags&SIMPLE; |
4928 | } | |
6136c704 | 4929 | if (is_open) { /* Starts with OPEN. */ |
3dab1dad | 4930 | REGTAIL(pRExC_state, ret, br); /* OPEN -> first. */ |
a0ed51b3 LW |
4931 | } |
4932 | else if (paren != '?') /* Not Conditional */ | |
a0d0e21e | 4933 | ret = br; |
32a0ca98 | 4934 | *flagp |= flags & (SPSTART | HASWIDTH); |
c277df42 | 4935 | lastbr = br; |
830247a4 IZ |
4936 | while (*RExC_parse == '|') { |
4937 | if (!SIZE_ONLY && RExC_extralen) { | |
4938 | ender = reganode(pRExC_state, LONGJMP,0); | |
3dab1dad | 4939 | REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); /* Append to the previous. */ |
c277df42 IZ |
4940 | } |
4941 | if (SIZE_ONLY) | |
830247a4 IZ |
4942 | RExC_extralen += 2; /* Account for LONGJMP. */ |
4943 | nextchar(pRExC_state); | |
3dab1dad | 4944 | br = regbranch(pRExC_state, &flags, 0, depth+1); |
2af232bd | 4945 | |
a687059c | 4946 | if (br == NULL) |
a0d0e21e | 4947 | return(NULL); |
3dab1dad | 4948 | REGTAIL(pRExC_state, lastbr, br); /* BRANCH -> BRANCH. */ |
c277df42 | 4949 | lastbr = br; |
821b33a5 IZ |
4950 | if (flags&HASWIDTH) |
4951 | *flagp |= HASWIDTH; | |
a687059c | 4952 | *flagp |= flags&SPSTART; |
a0d0e21e LW |
4953 | } |
4954 | ||
c277df42 IZ |
4955 | if (have_branch || paren != ':') { |
4956 | /* Make a closing node, and hook it on the end. */ | |
4957 | switch (paren) { | |
4958 | case ':': | |
830247a4 | 4959 | ender = reg_node(pRExC_state, TAIL); |
c277df42 IZ |
4960 | break; |
4961 | case 1: | |
830247a4 | 4962 | ender = reganode(pRExC_state, CLOSE, parno); |
fac92740 MJD |
4963 | Set_Node_Offset(ender,RExC_parse+1); /* MJD */ |
4964 | Set_Node_Length(ender,1); /* MJD */ | |
c277df42 IZ |
4965 | break; |
4966 | case '<': | |
c277df42 IZ |
4967 | case ',': |
4968 | case '=': | |
4969 | case '!': | |
c277df42 | 4970 | *flagp &= ~HASWIDTH; |
821b33a5 IZ |
4971 | /* FALL THROUGH */ |
4972 | case '>': | |
830247a4 | 4973 | ender = reg_node(pRExC_state, SUCCEED); |
c277df42 IZ |
4974 | break; |
4975 | case 0: | |
830247a4 | 4976 | ender = reg_node(pRExC_state, END); |
c277df42 IZ |
4977 | break; |
4978 | } | |
eaf3ca90 | 4979 | REGTAIL(pRExC_state, lastbr, ender); |
a0d0e21e | 4980 | |
9674d46a | 4981 | if (have_branch && !SIZE_ONLY) { |
eaf3ca90 YO |
4982 | if (depth==1) |
4983 | RExC_seen |= REG_TOP_LEVEL_BRANCHES; | |
4984 | ||
c277df42 | 4985 | /* Hook the tails of the branches to the closing node. */ |
9674d46a AL |
4986 | for (br = ret; br; br = regnext(br)) { |
4987 | const U8 op = PL_regkind[OP(br)]; | |
4988 | if (op == BRANCH) { | |
07be1b83 | 4989 | REGTAIL_STUDY(pRExC_state, NEXTOPER(br), ender); |
9674d46a AL |
4990 | } |
4991 | else if (op == BRANCHJ) { | |
07be1b83 | 4992 | REGTAIL_STUDY(pRExC_state, NEXTOPER(NEXTOPER(br)), ender); |
9674d46a | 4993 | } |
c277df42 IZ |
4994 | } |
4995 | } | |
a0d0e21e | 4996 | } |
c277df42 IZ |
4997 | |
4998 | { | |
e1ec3a88 AL |
4999 | const char *p; |
5000 | static const char parens[] = "=!<,>"; | |
c277df42 IZ |
5001 | |
5002 | if (paren && (p = strchr(parens, paren))) { | |
eb160463 | 5003 | U8 node = ((p - parens) % 2) ? UNLESSM : IFMATCH; |
c277df42 IZ |
5004 | int flag = (p - parens) > 1; |
5005 | ||
5006 | if (paren == '>') | |
5007 | node = SUSPEND, flag = 0; | |
6bda09f9 | 5008 | reginsert(pRExC_state, node,ret, depth+1); |
45948336 EP |
5009 | Set_Node_Cur_Length(ret); |
5010 | Set_Node_Offset(ret, parse_start + 1); | |
c277df42 | 5011 | ret->flags = flag; |
07be1b83 | 5012 | REGTAIL_STUDY(pRExC_state, ret, reg_node(pRExC_state, TAIL)); |
c277df42 | 5013 | } |
a0d0e21e LW |
5014 | } |
5015 | ||
5016 | /* Check for proper termination. */ | |
ce3e6498 | 5017 | if (paren) { |
e2509266 | 5018 | RExC_flags = oregflags; |
830247a4 IZ |
5019 | if (RExC_parse >= RExC_end || *nextchar(pRExC_state) != ')') { |
5020 | RExC_parse = oregcomp_parse; | |
380a0633 | 5021 | vFAIL("Unmatched ("); |
ce3e6498 | 5022 | } |
a0ed51b3 | 5023 | } |
830247a4 IZ |
5024 | else if (!paren && RExC_parse < RExC_end) { |
5025 | if (*RExC_parse == ')') { | |
5026 | RExC_parse++; | |
380a0633 | 5027 | vFAIL("Unmatched )"); |
a0ed51b3 LW |
5028 | } |
5029 | else | |
b45f050a | 5030 | FAIL("Junk on end of regexp"); /* "Can't happen". */ |
a0d0e21e LW |
5031 | /* NOTREACHED */ |
5032 | } | |
a687059c | 5033 | |
a0d0e21e | 5034 | return(ret); |
a687059c LW |
5035 | } |
5036 | ||
5037 | /* | |
5038 | - regbranch - one alternative of an | operator | |
5039 | * | |
5040 | * Implements the concatenation operator. | |
5041 | */ | |
76e3520e | 5042 | STATIC regnode * |
3dab1dad | 5043 | S_regbranch(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, I32 first, U32 depth) |
a687059c | 5044 | { |
97aff369 | 5045 | dVAR; |
c277df42 IZ |
5046 | register regnode *ret; |
5047 | register regnode *chain = NULL; | |
5048 | register regnode *latest; | |
5049 | I32 flags = 0, c = 0; | |
3dab1dad YO |
5050 | GET_RE_DEBUG_FLAGS_DECL; |
5051 | DEBUG_PARSE("brnc"); | |
b81d288d | 5052 | if (first) |
c277df42 IZ |
5053 | ret = NULL; |
5054 | else { | |
b81d288d | 5055 | if (!SIZE_ONLY && RExC_extralen) |
830247a4 | 5056 | ret = reganode(pRExC_state, BRANCHJ,0); |
fac92740 | 5057 | else { |
830247a4 | 5058 | ret = reg_node(pRExC_state, BRANCH); |
fac92740 MJD |
5059 | Set_Node_Length(ret, 1); |
5060 | } | |
c277df42 IZ |
5061 | } |
5062 | ||
b81d288d | 5063 | if (!first && SIZE_ONLY) |
830247a4 | 5064 | RExC_extralen += 1; /* BRANCHJ */ |
b81d288d | 5065 | |
c277df42 | 5066 | *flagp = WORST; /* Tentatively. */ |
a0d0e21e | 5067 | |
830247a4 IZ |
5068 | RExC_parse--; |
5069 | nextchar(pRExC_state); | |
5070 | while (RExC_parse < RExC_end && *RExC_parse != '|' && *RExC_parse != ')') { | |
a0d0e21e | 5071 | flags &= ~TRYAGAIN; |
3dab1dad | 5072 | latest = regpiece(pRExC_state, &flags,depth+1); |
a0d0e21e LW |
5073 | if (latest == NULL) { |
5074 | if (flags & TRYAGAIN) | |
5075 | continue; | |
5076 | return(NULL); | |
a0ed51b3 LW |
5077 | } |
5078 | else if (ret == NULL) | |
c277df42 | 5079 | ret = latest; |
a0d0e21e | 5080 | *flagp |= flags&HASWIDTH; |
c277df42 | 5081 | if (chain == NULL) /* First piece. */ |
a0d0e21e LW |
5082 | *flagp |= flags&SPSTART; |
5083 | else { | |
830247a4 | 5084 | RExC_naughty++; |
3dab1dad | 5085 | REGTAIL(pRExC_state, chain, latest); |
a687059c | 5086 | } |
a0d0e21e | 5087 | chain = latest; |
c277df42 IZ |
5088 | c++; |
5089 | } | |
5090 | if (chain == NULL) { /* Loop ran zero times. */ | |
830247a4 | 5091 | chain = reg_node(pRExC_state, NOTHING); |
c277df42 IZ |
5092 | if (ret == NULL) |
5093 | ret = chain; | |
5094 | } | |
5095 | if (c == 1) { | |
5096 | *flagp |= flags&SIMPLE; | |
a0d0e21e | 5097 | } |
a687059c | 5098 | |
d4c19fe8 | 5099 | return ret; |
a687059c LW |
5100 | } |
5101 | ||
5102 | /* | |
5103 | - regpiece - something followed by possible [*+?] | |
5104 | * | |
5105 | * Note that the branching code sequences used for ? and the general cases | |
5106 | * of * and + are somewhat optimized: they use the same NOTHING node as | |
5107 | * both the endmarker for their branch list and the body of the last branch. | |
5108 | * It might seem that this node could be dispensed with entirely, but the | |
5109 | * endmarker role is not redundant. | |
5110 | */ | |
76e3520e | 5111 | STATIC regnode * |
3dab1dad | 5112 | S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth) |
a687059c | 5113 | { |
97aff369 | 5114 | dVAR; |
c277df42 | 5115 | register regnode *ret; |
a0d0e21e LW |
5116 | register char op; |
5117 | register char *next; | |
5118 | I32 flags; | |
1df70142 | 5119 | const char * const origparse = RExC_parse; |
a0d0e21e | 5120 | I32 min; |
c277df42 | 5121 | I32 max = REG_INFTY; |
fac92740 | 5122 | char *parse_start; |
10edeb5d | 5123 | const char *maxpos = NULL; |
3dab1dad YO |
5124 | GET_RE_DEBUG_FLAGS_DECL; |
5125 | DEBUG_PARSE("piec"); | |
a0d0e21e | 5126 | |
3dab1dad | 5127 | ret = regatom(pRExC_state, &flags,depth+1); |
a0d0e21e LW |
5128 | if (ret == NULL) { |
5129 | if (flags & TRYAGAIN) | |
5130 | *flagp |= TRYAGAIN; | |
5131 | return(NULL); | |
5132 | } | |
5133 | ||
830247a4 | 5134 | op = *RExC_parse; |
a0d0e21e | 5135 | |
830247a4 | 5136 | if (op == '{' && regcurly(RExC_parse)) { |
10edeb5d | 5137 | maxpos = NULL; |
fac92740 | 5138 | parse_start = RExC_parse; /* MJD */ |
830247a4 | 5139 | next = RExC_parse + 1; |
a0d0e21e LW |
5140 | while (isDIGIT(*next) || *next == ',') { |
5141 | if (*next == ',') { | |
5142 | if (maxpos) | |
5143 | break; | |
5144 | else | |
5145 | maxpos = next; | |
a687059c | 5146 | } |
a0d0e21e LW |
5147 | next++; |
5148 | } | |
5149 | if (*next == '}') { /* got one */ | |
5150 | if (!maxpos) | |
5151 | maxpos = next; | |
830247a4 IZ |
5152 | RExC_parse++; |
5153 | min = atoi(RExC_parse); | |
a0d0e21e LW |
5154 | if (*maxpos == ',') |
5155 | maxpos++; | |
5156 | else | |
830247a4 | 5157 | maxpos = RExC_parse; |
a0d0e21e LW |
5158 | max = atoi(maxpos); |
5159 | if (!max && *maxpos != '0') | |
c277df42 IZ |
5160 | max = REG_INFTY; /* meaning "infinity" */ |
5161 | else if (max >= REG_INFTY) | |
8615cb43 | 5162 | vFAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1); |
830247a4 IZ |
5163 | RExC_parse = next; |
5164 | nextchar(pRExC_state); | |
a0d0e21e LW |
5165 | |
5166 | do_curly: | |
5167 | if ((flags&SIMPLE)) { | |
830247a4 | 5168 | RExC_naughty += 2 + RExC_naughty / 2; |
6bda09f9 | 5169 | reginsert(pRExC_state, CURLY, ret, depth+1); |
fac92740 MJD |
5170 | Set_Node_Offset(ret, parse_start+1); /* MJD */ |
5171 | Set_Node_Cur_Length(ret); | |
a0d0e21e LW |
5172 | } |
5173 | else { | |
3dab1dad | 5174 | regnode * const w = reg_node(pRExC_state, WHILEM); |
2c2d71f5 JH |
5175 | |
5176 | w->flags = 0; | |
3dab1dad | 5177 | REGTAIL(pRExC_state, ret, w); |
830247a4 | 5178 | if (!SIZE_ONLY && RExC_extralen) { |
6bda09f9 YO |
5179 | reginsert(pRExC_state, LONGJMP,ret, depth+1); |
5180 | reginsert(pRExC_state, NOTHING,ret, depth+1); | |
c277df42 IZ |
5181 | NEXT_OFF(ret) = 3; /* Go over LONGJMP. */ |
5182 | } | |
6bda09f9 | 5183 | reginsert(pRExC_state, CURLYX,ret, depth+1); |
fac92740 MJD |
5184 | /* MJD hk */ |
5185 | Set_Node_Offset(ret, parse_start+1); | |
2af232bd | 5186 | Set_Node_Length(ret, |
fac92740 | 5187 | op == '{' ? (RExC_parse - parse_start) : 1); |
2af232bd | 5188 | |
830247a4 | 5189 | if (!SIZE_ONLY && RExC_extralen) |
c277df42 | 5190 | NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */ |
3dab1dad | 5191 | REGTAIL(pRExC_state, ret, reg_node(pRExC_state, NOTHING)); |
c277df42 | 5192 | if (SIZE_ONLY) |
830247a4 IZ |
5193 | RExC_whilem_seen++, RExC_extralen += 3; |
5194 | RExC_naughty += 4 + RExC_naughty; /* compound interest */ | |
a0d0e21e | 5195 | } |
c277df42 | 5196 | ret->flags = 0; |
a0d0e21e LW |
5197 | |
5198 | if (min > 0) | |
821b33a5 IZ |
5199 | *flagp = WORST; |
5200 | if (max > 0) | |
5201 | *flagp |= HASWIDTH; | |
a0d0e21e | 5202 | if (max && max < min) |
8615cb43 | 5203 | vFAIL("Can't do {n,m} with n > m"); |
c277df42 | 5204 | if (!SIZE_ONLY) { |
eb160463 GS |
5205 | ARG1_SET(ret, (U16)min); |
5206 | ARG2_SET(ret, (U16)max); | |
a687059c | 5207 | } |
a687059c | 5208 | |
a0d0e21e | 5209 | goto nest_check; |
a687059c | 5210 | } |
a0d0e21e | 5211 | } |
a687059c | 5212 | |
a0d0e21e LW |
5213 | if (!ISMULT1(op)) { |
5214 | *flagp = flags; | |
a687059c | 5215 | return(ret); |
a0d0e21e | 5216 | } |
bb20fd44 | 5217 | |
c277df42 | 5218 | #if 0 /* Now runtime fix should be reliable. */ |
b45f050a JF |
5219 | |
5220 | /* if this is reinstated, don't forget to put this back into perldiag: | |
5221 | ||
5222 | =item Regexp *+ operand could be empty at {#} in regex m/%s/ | |
5223 | ||
5224 | (F) The part of the regexp subject to either the * or + quantifier | |
5225 | could match an empty string. The {#} shows in the regular | |
5226 | expression about where the problem was discovered. | |
5227 | ||
5228 | */ | |
5229 | ||
bb20fd44 | 5230 | if (!(flags&HASWIDTH) && op != '?') |
b45f050a | 5231 | vFAIL("Regexp *+ operand could be empty"); |
b81d288d | 5232 | #endif |
bb20fd44 | 5233 | |
fac92740 | 5234 | parse_start = RExC_parse; |
830247a4 | 5235 | nextchar(pRExC_state); |
a0d0e21e | 5236 | |
821b33a5 | 5237 | *flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH); |
a0d0e21e LW |
5238 | |
5239 | if (op == '*' && (flags&SIMPLE)) { | |
6bda09f9 | 5240 | reginsert(pRExC_state, STAR, ret, depth+1); |
c277df42 | 5241 | ret->flags = 0; |
830247a4 | 5242 | RExC_naughty += 4; |
a0d0e21e LW |
5243 | } |
5244 | else if (op == '*') { | |
5245 | min = 0; | |
5246 | goto do_curly; | |
a0ed51b3 LW |
5247 | } |
5248 | else if (op == '+' && (flags&SIMPLE)) { | |
6bda09f9 | 5249 | reginsert(pRExC_state, PLUS, ret, depth+1); |
c277df42 | 5250 | ret->flags = 0; |
830247a4 | 5251 | RExC_naughty += 3; |
a0d0e21e LW |
5252 | } |
5253 | else if (op == '+') { | |
5254 | min = 1; | |
5255 | goto do_curly; | |
a0ed51b3 LW |
5256 | } |
5257 | else if (op == '?') { | |
a0d0e21e LW |
5258 | min = 0; max = 1; |
5259 | goto do_curly; | |
5260 | } | |
5261 | nest_check: | |
041457d9 | 5262 | if (!SIZE_ONLY && !(flags&HASWIDTH) && max > REG_INFTY/3 && ckWARN(WARN_REGEXP)) { |
830247a4 | 5263 | vWARN3(RExC_parse, |
b45f050a | 5264 | "%.*s matches null string many times", |
afd78fd5 | 5265 | (int)(RExC_parse >= origparse ? RExC_parse - origparse : 0), |
b45f050a | 5266 | origparse); |
a0d0e21e LW |
5267 | } |
5268 | ||
b9b4dddf | 5269 | if (RExC_parse < RExC_end && *RExC_parse == '?') { |
830247a4 | 5270 | nextchar(pRExC_state); |
6bda09f9 | 5271 | reginsert(pRExC_state, MINMOD, ret, depth+1); |
3dab1dad | 5272 | REGTAIL(pRExC_state, ret, ret + NODE_STEP_REGNODE); |
a0d0e21e | 5273 | } |
b9b4dddf YO |
5274 | #ifndef REG_ALLOW_MINMOD_SUSPEND |
5275 | else | |
5276 | #endif | |
5277 | if (RExC_parse < RExC_end && *RExC_parse == '+') { | |
5278 | regnode *ender; | |
5279 | nextchar(pRExC_state); | |
5280 | ender = reg_node(pRExC_state, SUCCEED); | |
5281 | REGTAIL(pRExC_state, ret, ender); | |
5282 | reginsert(pRExC_state, SUSPEND, ret, depth+1); | |
5283 | ret->flags = 0; | |
5284 | ender = reg_node(pRExC_state, TAIL); | |
5285 | REGTAIL(pRExC_state, ret, ender); | |
5286 | /*ret= ender;*/ | |
5287 | } | |
5288 | ||
5289 | if (RExC_parse < RExC_end && ISMULT2(RExC_parse)) { | |
830247a4 | 5290 | RExC_parse++; |
b45f050a JF |
5291 | vFAIL("Nested quantifiers"); |
5292 | } | |
a0d0e21e LW |
5293 | |
5294 | return(ret); | |
a687059c LW |
5295 | } |
5296 | ||
fc8cd66c YO |
5297 | |
5298 | /* reg_namedseq(pRExC_state,UVp) | |
5299 | ||
5300 | This is expected to be called by a parser routine that has | |
5301 | recognized'\N' and needs to handle the rest. RExC_parse is | |
5302 | expected to point at the first char following the N at the time | |
5303 | of the call. | |
5304 | ||
5305 | If valuep is non-null then it is assumed that we are parsing inside | |
5306 | of a charclass definition and the first codepoint in the resolved | |
5307 | string is returned via *valuep and the routine will return NULL. | |
5308 | In this mode if a multichar string is returned from the charnames | |
5309 | handler a warning will be issued, and only the first char in the | |
5310 | sequence will be examined. If the string returned is zero length | |
5311 | then the value of *valuep is undefined and NON-NULL will | |
5312 | be returned to indicate failure. (This will NOT be a valid pointer | |
5313 | to a regnode.) | |
5314 | ||
5315 | If value is null then it is assumed that we are parsing normal text | |
5316 | and inserts a new EXACT node into the program containing the resolved | |
5317 | string and returns a pointer to the new node. If the string is | |
5318 | zerolength a NOTHING node is emitted. | |
5319 | ||
5320 | On success RExC_parse is set to the char following the endbrace. | |
5321 | Parsing failures will generate a fatal errorvia vFAIL(...) | |
5322 | ||
5323 | NOTE: We cache all results from the charnames handler locally in | |
5324 | the RExC_charnames hash (created on first use) to prevent a charnames | |
5325 | handler from playing silly-buggers and returning a short string and | |
5326 | then a long string for a given pattern. Since the regexp program | |
5327 | size is calculated during an initial parse this would result | |
5328 | in a buffer overrun so we cache to prevent the charname result from | |
5329 | changing during the course of the parse. | |
5330 | ||
5331 | */ | |
5332 | STATIC regnode * | |
5333 | S_reg_namedseq(pTHX_ RExC_state_t *pRExC_state, UV *valuep) | |
5334 | { | |
5335 | char * name; /* start of the content of the name */ | |
5336 | char * endbrace; /* endbrace following the name */ | |
5337 | SV *sv_str = NULL; | |
5338 | SV *sv_name = NULL; | |
5339 | STRLEN len; /* this has various purposes throughout the code */ | |
5340 | bool cached = 0; /* if this is true then we shouldn't refcount dev sv_str */ | |
5341 | regnode *ret = NULL; | |
5342 | ||
5343 | if (*RExC_parse != '{') { | |
5344 | vFAIL("Missing braces on \\N{}"); | |
5345 | } | |
5346 | name = RExC_parse+1; | |
5347 | endbrace = strchr(RExC_parse, '}'); | |
5348 | if ( ! endbrace ) { | |
5349 | RExC_parse++; | |
5350 | vFAIL("Missing right brace on \\N{}"); | |
5351 | } | |
5352 | RExC_parse = endbrace + 1; | |
5353 | ||
5354 | ||
5355 | /* RExC_parse points at the beginning brace, | |
5356 | endbrace points at the last */ | |
5357 | if ( name[0]=='U' && name[1]=='+' ) { | |
5358 | /* its a "unicode hex" notation {U+89AB} */ | |
5359 | I32 fl = PERL_SCAN_ALLOW_UNDERSCORES | |
5360 | | PERL_SCAN_DISALLOW_PREFIX | |
5361 | | (SIZE_ONLY ? PERL_SCAN_SILENT_ILLDIGIT : 0); | |
5362 | UV cp; | |
196f1508 | 5363 | len = (STRLEN)(endbrace - name - 2); |
fc8cd66c | 5364 | cp = grok_hex(name + 2, &len, &fl, NULL); |
196f1508 | 5365 | if ( len != (STRLEN)(endbrace - name - 2) ) { |
fc8cd66c YO |
5366 | cp = 0xFFFD; |
5367 | } | |
5368 | if (cp > 0xff) | |
5369 | RExC_utf8 = 1; | |
5370 | if ( valuep ) { | |
5371 | *valuep = cp; | |
5372 | return NULL; | |
5373 | } | |
5374 | sv_str= Perl_newSVpvf_nocontext("%c",(int)cp); | |
5375 | } else { | |
5376 | /* fetch the charnames handler for this scope */ | |
5377 | HV * const table = GvHV(PL_hintgv); | |
5378 | SV **cvp= table ? | |
5379 | hv_fetchs(table, "charnames", FALSE) : | |
5380 | NULL; | |
5381 | SV *cv= cvp ? *cvp : NULL; | |
5382 | HE *he_str; | |
5383 | int count; | |
5384 | /* create an SV with the name as argument */ | |
5385 | sv_name = newSVpvn(name, endbrace - name); | |
5386 | ||
5387 | if (!table || !(PL_hints & HINT_LOCALIZE_HH)) { | |
5388 | vFAIL2("Constant(\\N{%s}) unknown: " | |
5389 | "(possibly a missing \"use charnames ...\")", | |
5390 | SvPVX(sv_name)); | |
5391 | } | |
5392 | if (!cvp || !SvOK(*cvp)) { /* when $^H{charnames} = undef; */ | |
5393 | vFAIL2("Constant(\\N{%s}): " | |
5394 | "$^H{charnames} is not defined",SvPVX(sv_name)); | |
5395 | } | |
5396 | ||
5397 | ||
5398 | ||
5399 | if (!RExC_charnames) { | |
5400 | /* make sure our cache is allocated */ | |
5401 | RExC_charnames = newHV(); | |
6bda09f9 | 5402 | sv_2mortal((SV*)RExC_charnames); |
fc8cd66c YO |
5403 | } |
5404 | /* see if we have looked this one up before */ | |
5405 | he_str = hv_fetch_ent( RExC_charnames, sv_name, 0, 0 ); | |
5406 | if ( he_str ) { | |
5407 | sv_str = HeVAL(he_str); | |
5408 | cached = 1; | |
5409 | } else { | |
5410 | dSP ; | |
5411 | ||
5412 | ENTER ; | |
5413 | SAVETMPS ; | |
5414 | PUSHMARK(SP) ; | |
5415 | ||
5416 | XPUSHs(sv_name); | |
5417 | ||
5418 | PUTBACK ; | |
5419 | ||
5420 | count= call_sv(cv, G_SCALAR); | |
5421 | ||
5422 | if (count == 1) { /* XXXX is this right? dmq */ | |
5423 | sv_str = POPs; | |
5424 | SvREFCNT_inc_simple_void(sv_str); | |
5425 | } | |
5426 | ||
5427 | SPAGAIN ; | |
5428 | PUTBACK ; | |
5429 | FREETMPS ; | |
5430 | LEAVE ; | |
5431 | ||
5432 | if ( !sv_str || !SvOK(sv_str) ) { | |
5433 | vFAIL2("Constant(\\N{%s}): Call to &{$^H{charnames}} " | |
5434 | "did not return a defined value",SvPVX(sv_name)); | |
5435 | } | |
5436 | if (hv_store_ent( RExC_charnames, sv_name, sv_str, 0)) | |
5437 | cached = 1; | |
5438 | } | |
5439 | } | |
5440 | if (valuep) { | |
5441 | char *p = SvPV(sv_str, len); | |
5442 | if (len) { | |
5443 | STRLEN numlen = 1; | |
5444 | if ( SvUTF8(sv_str) ) { | |
196f1508 | 5445 | *valuep = utf8_to_uvchr((U8*)p, &numlen); |
fc8cd66c YO |
5446 | if (*valuep > 0x7F) |
5447 | RExC_utf8 = 1; | |
5448 | /* XXXX | |
5449 | We have to turn on utf8 for high bit chars otherwise | |
5450 | we get failures with | |
5451 | ||
5452 | "ss" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i | |
5453 | "SS" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i | |
5454 | ||
5455 | This is different from what \x{} would do with the same | |
5456 | codepoint, where the condition is > 0xFF. | |
5457 | - dmq | |
5458 | */ | |
5459 | ||
5460 | ||
5461 | } else { | |
5462 | *valuep = (UV)*p; | |
5463 | /* warn if we havent used the whole string? */ | |
5464 | } | |
5465 | if (numlen<len && SIZE_ONLY && ckWARN(WARN_REGEXP)) { | |
5466 | vWARN2(RExC_parse, | |
5467 | "Ignoring excess chars from \\N{%s} in character class", | |
5468 | SvPVX(sv_name) | |
5469 | ); | |
5470 | } | |
5471 | } else if (SIZE_ONLY && ckWARN(WARN_REGEXP)) { | |
5472 | vWARN2(RExC_parse, | |
5473 | "Ignoring zero length \\N{%s} in character class", | |
5474 | SvPVX(sv_name) | |
5475 | ); | |
5476 | } | |
5477 | if (sv_name) | |
5478 | SvREFCNT_dec(sv_name); | |
5479 | if (!cached) | |
5480 | SvREFCNT_dec(sv_str); | |
5481 | return len ? NULL : (regnode *)&len; | |
5482 | } else if(SvCUR(sv_str)) { | |
5483 | ||
5484 | char *s; | |
5485 | char *p, *pend; | |
5486 | STRLEN charlen = 1; | |
5487 | char * parse_start = name-3; /* needed for the offsets */ | |
5488 | GET_RE_DEBUG_FLAGS_DECL; /* needed for the offsets */ | |
5489 | ||
5490 | ret = reg_node(pRExC_state, | |
5491 | (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT)); | |
5492 | s= STRING(ret); | |
5493 | ||
5494 | if ( RExC_utf8 && !SvUTF8(sv_str) ) { | |
5495 | sv_utf8_upgrade(sv_str); | |
5496 | } else if ( !RExC_utf8 && SvUTF8(sv_str) ) { | |
5497 | RExC_utf8= 1; | |
5498 | } | |
5499 | ||
5500 | p = SvPV(sv_str, len); | |
5501 | pend = p + len; | |
5502 | /* len is the length written, charlen is the size the char read */ | |
5503 | for ( len = 0; p < pend; p += charlen ) { | |
5504 | if (UTF) { | |
196f1508 | 5505 | UV uvc = utf8_to_uvchr((U8*)p, &charlen); |
fc8cd66c YO |
5506 | if (FOLD) { |
5507 | STRLEN foldlen,numlen; | |
5508 | U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf; | |
5509 | uvc = toFOLD_uni(uvc, tmpbuf, &foldlen); | |
5510 | /* Emit all the Unicode characters. */ | |
5511 | ||
5512 | for (foldbuf = tmpbuf; | |
5513 | foldlen; | |
5514 | foldlen -= numlen) | |
5515 | { | |
5516 | uvc = utf8_to_uvchr(foldbuf, &numlen); | |
5517 | if (numlen > 0) { | |
5518 | const STRLEN unilen = reguni(pRExC_state, uvc, s); | |
5519 | s += unilen; | |
5520 | len += unilen; | |
5521 | /* In EBCDIC the numlen | |
5522 | * and unilen can differ. */ | |
5523 | foldbuf += numlen; | |
5524 | if (numlen >= foldlen) | |
5525 | break; | |
5526 | } | |
5527 | else | |
5528 | break; /* "Can't happen." */ | |
5529 | } | |
5530 | } else { | |
5531 | const STRLEN unilen = reguni(pRExC_state, uvc, s); | |
5532 | if (unilen > 0) { | |
5533 | s += unilen; | |
5534 | len += unilen; | |
5535 | } | |
5536 | } | |
5537 | } else { | |
5538 | len++; | |
5539 | REGC(*p, s++); | |
5540 | } | |
5541 | } | |
5542 | if (SIZE_ONLY) { | |
5543 | RExC_size += STR_SZ(len); | |
5544 | } else { | |
5545 | STR_LEN(ret) = len; | |
5546 | RExC_emit += STR_SZ(len); | |
5547 | } | |
5548 | Set_Node_Cur_Length(ret); /* MJD */ | |
5549 | RExC_parse--; | |
5550 | nextchar(pRExC_state); | |
5551 | } else { | |
5552 | ret = reg_node(pRExC_state,NOTHING); | |
5553 | } | |
5554 | if (!cached) { | |
5555 | SvREFCNT_dec(sv_str); | |
5556 | } | |
5557 | if (sv_name) { | |
5558 | SvREFCNT_dec(sv_name); | |
5559 | } | |
5560 | return ret; | |
5561 | ||
5562 | } | |
5563 | ||
5564 | ||
5565 | ||
a687059c LW |
5566 | /* |
5567 | - regatom - the lowest level | |
5568 | * | |
5569 | * Optimization: gobbles an entire sequence of ordinary characters so that | |
5570 | * it can turn them into a single node, which is smaller to store and | |
5571 | * faster to run. Backslashed characters are exceptions, each becoming a | |
5572 | * separate node; the code is simpler that way and it's not worth fixing. | |
5573 | * | |
7f6f358c YO |
5574 | * [Yes, it is worth fixing, some scripts can run twice the speed.] |
5575 | * [It looks like its ok, as in S_study_chunk we merge adjacent EXACT nodes] | |
5576 | */ | |
76e3520e | 5577 | STATIC regnode * |
3dab1dad | 5578 | S_regatom(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth) |
a687059c | 5579 | { |
97aff369 | 5580 | dVAR; |
cbbf8932 | 5581 | register regnode *ret = NULL; |
a0d0e21e | 5582 | I32 flags; |
45948336 | 5583 | char *parse_start = RExC_parse; |
3dab1dad YO |
5584 | GET_RE_DEBUG_FLAGS_DECL; |
5585 | DEBUG_PARSE("atom"); | |
a0d0e21e LW |
5586 | *flagp = WORST; /* Tentatively. */ |
5587 | ||
5588 | tryagain: | |
830247a4 | 5589 | switch (*RExC_parse) { |
a0d0e21e | 5590 | case '^': |
830247a4 IZ |
5591 | RExC_seen_zerolen++; |
5592 | nextchar(pRExC_state); | |
e2509266 | 5593 | if (RExC_flags & PMf_MULTILINE) |
830247a4 | 5594 | ret = reg_node(pRExC_state, MBOL); |
e2509266 | 5595 | else if (RExC_flags & PMf_SINGLELINE) |
830247a4 | 5596 | ret = reg_node(pRExC_state, SBOL); |
a0d0e21e | 5597 | else |
830247a4 | 5598 | ret = reg_node(pRExC_state, BOL); |
fac92740 | 5599 | Set_Node_Length(ret, 1); /* MJD */ |
a0d0e21e LW |
5600 | break; |
5601 | case '$': | |
830247a4 | 5602 | nextchar(pRExC_state); |
b81d288d | 5603 | if (*RExC_parse) |
830247a4 | 5604 | RExC_seen_zerolen++; |
e2509266 | 5605 | if (RExC_flags & PMf_MULTILINE) |
830247a4 | 5606 | ret = reg_node(pRExC_state, MEOL); |
e2509266 | 5607 | else if (RExC_flags & PMf_SINGLELINE) |
830247a4 | 5608 | ret = reg_node(pRExC_state, SEOL); |
a0d0e21e | 5609 | else |
830247a4 | 5610 | ret = reg_node(pRExC_state, EOL); |
fac92740 | 5611 | Set_Node_Length(ret, 1); /* MJD */ |
a0d0e21e LW |
5612 | break; |
5613 | case '.': | |
830247a4 | 5614 | nextchar(pRExC_state); |
e2509266 | 5615 | if (RExC_flags & PMf_SINGLELINE) |
ffc61ed2 JH |
5616 | ret = reg_node(pRExC_state, SANY); |
5617 | else | |
5618 | ret = reg_node(pRExC_state, REG_ANY); | |
5619 | *flagp |= HASWIDTH|SIMPLE; | |
830247a4 | 5620 | RExC_naughty++; |
fac92740 | 5621 | Set_Node_Length(ret, 1); /* MJD */ |
a0d0e21e LW |
5622 | break; |
5623 | case '[': | |
b45f050a | 5624 | { |
3dab1dad YO |
5625 | char * const oregcomp_parse = ++RExC_parse; |
5626 | ret = regclass(pRExC_state,depth+1); | |
830247a4 IZ |
5627 | if (*RExC_parse != ']') { |
5628 | RExC_parse = oregcomp_parse; | |
b45f050a JF |
5629 | vFAIL("Unmatched ["); |
5630 | } | |
830247a4 | 5631 | nextchar(pRExC_state); |
a0d0e21e | 5632 | *flagp |= HASWIDTH|SIMPLE; |
fac92740 | 5633 | Set_Node_Length(ret, RExC_parse - oregcomp_parse + 1); /* MJD */ |
a0d0e21e | 5634 | break; |
b45f050a | 5635 | } |
a0d0e21e | 5636 | case '(': |
830247a4 | 5637 | nextchar(pRExC_state); |
3dab1dad | 5638 | ret = reg(pRExC_state, 1, &flags,depth+1); |
a0d0e21e | 5639 | if (ret == NULL) { |
bf93d4cc | 5640 | if (flags & TRYAGAIN) { |
830247a4 | 5641 | if (RExC_parse == RExC_end) { |
bf93d4cc GS |
5642 | /* Make parent create an empty node if needed. */ |
5643 | *flagp |= TRYAGAIN; | |
5644 | return(NULL); | |
5645 | } | |
a0d0e21e | 5646 | goto tryagain; |
bf93d4cc | 5647 | } |
a0d0e21e LW |
5648 | return(NULL); |
5649 | } | |
c277df42 | 5650 | *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE); |
a0d0e21e LW |
5651 | break; |
5652 | case '|': | |
5653 | case ')': | |
5654 | if (flags & TRYAGAIN) { | |
5655 | *flagp |= TRYAGAIN; | |
5656 | return NULL; | |
5657 | } | |
b45f050a | 5658 | vFAIL("Internal urp"); |
a0d0e21e LW |
5659 | /* Supposed to be caught earlier. */ |
5660 | break; | |
85afd4ae | 5661 | case '{': |
830247a4 IZ |
5662 | if (!regcurly(RExC_parse)) { |
5663 | RExC_parse++; | |
85afd4ae CS |
5664 | goto defchar; |
5665 | } | |
5666 | /* FALL THROUGH */ | |
a0d0e21e LW |
5667 | case '?': |
5668 | case '+': | |
5669 | case '*': | |
830247a4 | 5670 | RExC_parse++; |
b45f050a | 5671 | vFAIL("Quantifier follows nothing"); |
a0d0e21e LW |
5672 | break; |
5673 | case '\\': | |
830247a4 | 5674 | switch (*++RExC_parse) { |
a0d0e21e | 5675 | case 'A': |
830247a4 IZ |
5676 | RExC_seen_zerolen++; |
5677 | ret = reg_node(pRExC_state, SBOL); | |
a0d0e21e | 5678 | *flagp |= SIMPLE; |
830247a4 | 5679 | nextchar(pRExC_state); |
fac92740 | 5680 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
5681 | break; |
5682 | case 'G': | |
830247a4 IZ |
5683 | ret = reg_node(pRExC_state, GPOS); |
5684 | RExC_seen |= REG_SEEN_GPOS; | |
a0d0e21e | 5685 | *flagp |= SIMPLE; |
830247a4 | 5686 | nextchar(pRExC_state); |
fac92740 | 5687 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
5688 | break; |
5689 | case 'Z': | |
830247a4 | 5690 | ret = reg_node(pRExC_state, SEOL); |
a0d0e21e | 5691 | *flagp |= SIMPLE; |
a1917ab9 | 5692 | RExC_seen_zerolen++; /* Do not optimize RE away */ |
830247a4 | 5693 | nextchar(pRExC_state); |
a0d0e21e | 5694 | break; |
b85d18e9 | 5695 | case 'z': |
830247a4 | 5696 | ret = reg_node(pRExC_state, EOS); |
b85d18e9 | 5697 | *flagp |= SIMPLE; |
830247a4 IZ |
5698 | RExC_seen_zerolen++; /* Do not optimize RE away */ |
5699 | nextchar(pRExC_state); | |
fac92740 | 5700 | Set_Node_Length(ret, 2); /* MJD */ |
b85d18e9 | 5701 | break; |
4a2d328f | 5702 | case 'C': |
f33976b4 DB |
5703 | ret = reg_node(pRExC_state, CANY); |
5704 | RExC_seen |= REG_SEEN_CANY; | |
a0ed51b3 | 5705 | *flagp |= HASWIDTH|SIMPLE; |
830247a4 | 5706 | nextchar(pRExC_state); |
fac92740 | 5707 | Set_Node_Length(ret, 2); /* MJD */ |
a0ed51b3 LW |
5708 | break; |
5709 | case 'X': | |
830247a4 | 5710 | ret = reg_node(pRExC_state, CLUMP); |
a0ed51b3 | 5711 | *flagp |= HASWIDTH; |
830247a4 | 5712 | nextchar(pRExC_state); |
fac92740 | 5713 | Set_Node_Length(ret, 2); /* MJD */ |
a0ed51b3 | 5714 | break; |
a0d0e21e | 5715 | case 'w': |
eb160463 | 5716 | ret = reg_node(pRExC_state, (U8)(LOC ? ALNUML : ALNUM)); |
a0d0e21e | 5717 | *flagp |= HASWIDTH|SIMPLE; |
830247a4 | 5718 | nextchar(pRExC_state); |
fac92740 | 5719 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
5720 | break; |
5721 | case 'W': | |
eb160463 | 5722 | ret = reg_node(pRExC_state, (U8)(LOC ? NALNUML : NALNUM)); |
a0d0e21e | 5723 | *flagp |= HASWIDTH|SIMPLE; |
830247a4 | 5724 | nextchar(pRExC_state); |
fac92740 | 5725 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
5726 | break; |
5727 | case 'b': | |
830247a4 IZ |
5728 | RExC_seen_zerolen++; |
5729 | RExC_seen |= REG_SEEN_LOOKBEHIND; | |
eb160463 | 5730 | ret = reg_node(pRExC_state, (U8)(LOC ? BOUNDL : BOUND)); |
a0d0e21e | 5731 | *flagp |= SIMPLE; |
830247a4 | 5732 | nextchar(pRExC_state); |
fac92740 | 5733 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
5734 | break; |
5735 | case 'B': | |
830247a4 IZ |
5736 | RExC_seen_zerolen++; |
5737 | RExC_seen |= REG_SEEN_LOOKBEHIND; | |
eb160463 | 5738 | ret = reg_node(pRExC_state, (U8)(LOC ? NBOUNDL : NBOUND)); |
a0d0e21e | 5739 | *flagp |= SIMPLE; |
830247a4 | 5740 | nextchar(pRExC_state); |
fac92740 | 5741 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
5742 | break; |
5743 | case 's': | |
eb160463 | 5744 | ret = reg_node(pRExC_state, (U8)(LOC ? SPACEL : SPACE)); |
a0d0e21e | 5745 | *flagp |= HASWIDTH|SIMPLE; |
830247a4 | 5746 | nextchar(pRExC_state); |
fac92740 | 5747 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
5748 | break; |
5749 | case 'S': | |
eb160463 | 5750 | ret = reg_node(pRExC_state, (U8)(LOC ? NSPACEL : NSPACE)); |
a0d0e21e | 5751 | *flagp |= HASWIDTH|SIMPLE; |
830247a4 | 5752 | nextchar(pRExC_state); |
fac92740 | 5753 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
5754 | break; |
5755 | case 'd': | |
ffc61ed2 | 5756 | ret = reg_node(pRExC_state, DIGIT); |
a0d0e21e | 5757 | *flagp |= HASWIDTH|SIMPLE; |
830247a4 | 5758 | nextchar(pRExC_state); |
fac92740 | 5759 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
5760 | break; |
5761 | case 'D': | |
ffc61ed2 | 5762 | ret = reg_node(pRExC_state, NDIGIT); |
a0d0e21e | 5763 | *flagp |= HASWIDTH|SIMPLE; |
830247a4 | 5764 | nextchar(pRExC_state); |
fac92740 | 5765 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e | 5766 | break; |
a14b48bc LW |
5767 | case 'p': |
5768 | case 'P': | |
3568d838 | 5769 | { |
3dab1dad | 5770 | char* const oldregxend = RExC_end; |
ccb2c380 | 5771 | char* parse_start = RExC_parse - 2; |
a14b48bc | 5772 | |
830247a4 | 5773 | if (RExC_parse[1] == '{') { |
3568d838 | 5774 | /* a lovely hack--pretend we saw [\pX] instead */ |
830247a4 IZ |
5775 | RExC_end = strchr(RExC_parse, '}'); |
5776 | if (!RExC_end) { | |
3dab1dad | 5777 | const U8 c = (U8)*RExC_parse; |
830247a4 IZ |
5778 | RExC_parse += 2; |
5779 | RExC_end = oldregxend; | |
0da60cf5 | 5780 | vFAIL2("Missing right brace on \\%c{}", c); |
b45f050a | 5781 | } |
830247a4 | 5782 | RExC_end++; |
a14b48bc | 5783 | } |
af6f566e | 5784 | else { |
830247a4 | 5785 | RExC_end = RExC_parse + 2; |
af6f566e HS |
5786 | if (RExC_end > oldregxend) |
5787 | RExC_end = oldregxend; | |
5788 | } | |
830247a4 | 5789 | RExC_parse--; |
a14b48bc | 5790 | |
3dab1dad | 5791 | ret = regclass(pRExC_state,depth+1); |
a14b48bc | 5792 | |
830247a4 IZ |
5793 | RExC_end = oldregxend; |
5794 | RExC_parse--; | |
ccb2c380 MP |
5795 | |
5796 | Set_Node_Offset(ret, parse_start + 2); | |
5797 | Set_Node_Cur_Length(ret); | |
830247a4 | 5798 | nextchar(pRExC_state); |
a14b48bc LW |
5799 | *flagp |= HASWIDTH|SIMPLE; |
5800 | } | |
5801 | break; | |
fc8cd66c YO |
5802 | case 'N': |
5803 | /* Handle \N{NAME} here and not below because it can be | |
5804 | multicharacter. join_exact() will join them up later on. | |
5805 | Also this makes sure that things like /\N{BLAH}+/ and | |
5806 | \N{BLAH} being multi char Just Happen. dmq*/ | |
5807 | ++RExC_parse; | |
5808 | ret= reg_namedseq(pRExC_state, NULL); | |
5809 | break; | |
0a4db386 | 5810 | case 'k': /* Handle \k<NAME> and \k'NAME' */ |
81714fb9 YO |
5811 | { |
5812 | char ch= RExC_parse[1]; | |
5813 | if (ch != '<' && ch != '\'') { | |
5814 | if (SIZE_ONLY) | |
5815 | vWARN( RExC_parse + 1, | |
5816 | "Possible broken named back reference treated as literal k"); | |
5817 | parse_start--; | |
5818 | goto defchar; | |
5819 | } else { | |
5820 | char* name_start = (RExC_parse += 2); | |
5821 | I32 num = 0; | |
0a4db386 YO |
5822 | SV *sv_dat = reg_scan_name(pRExC_state, |
5823 | SIZE_ONLY ? REG_RSN_RETURN_NULL : REG_RSN_RETURN_DATA); | |
894be9b7 YO |
5824 | ch= (ch == '<') ? '>' : '\''; |
5825 | ||
81714fb9 YO |
5826 | if (RExC_parse == name_start || *RExC_parse != ch) |
5827 | vFAIL2("Sequence \\k%c... not terminated", | |
5828 | (ch == '>' ? '<' : ch)); | |
5829 | ||
5830 | RExC_sawback = 1; | |
5831 | ret = reganode(pRExC_state, | |
5832 | (U8)(FOLD ? (LOC ? NREFFL : NREFF) : NREF), | |
5833 | num); | |
5834 | *flagp |= HASWIDTH; | |
5835 | ||
5836 | ||
5837 | if (!SIZE_ONLY) { | |
81714fb9 YO |
5838 | num = add_data( pRExC_state, 1, "S" ); |
5839 | ARG_SET(ret,num); | |
5840 | RExC_rx->data->data[num]=(void*)sv_dat; | |
5841 | SvREFCNT_inc(sv_dat); | |
5842 | } | |
5843 | /* override incorrect value set in reganode MJD */ | |
5844 | Set_Node_Offset(ret, parse_start+1); | |
5845 | Set_Node_Cur_Length(ret); /* MJD */ | |
5846 | nextchar(pRExC_state); | |
5847 | ||
5848 | } | |
5849 | break; | |
5850 | } | |
a0d0e21e LW |
5851 | case 'n': |
5852 | case 'r': | |
5853 | case 't': | |
5854 | case 'f': | |
5855 | case 'e': | |
5856 | case 'a': | |
5857 | case 'x': | |
5858 | case 'c': | |
5859 | case '0': | |
5860 | goto defchar; | |
5861 | case '1': case '2': case '3': case '4': | |
5862 | case '5': case '6': case '7': case '8': case '9': | |
5863 | { | |
1df70142 | 5864 | const I32 num = atoi(RExC_parse); |
a0d0e21e | 5865 | |
830247a4 | 5866 | if (num > 9 && num >= RExC_npar) |
a0d0e21e LW |
5867 | goto defchar; |
5868 | else { | |
3dab1dad | 5869 | char * const parse_start = RExC_parse - 1; /* MJD */ |
830247a4 IZ |
5870 | while (isDIGIT(*RExC_parse)) |
5871 | RExC_parse++; | |
b45f050a | 5872 | |
eb160463 | 5873 | if (!SIZE_ONLY && num > (I32)RExC_rx->nparens) |
9baa0206 | 5874 | vFAIL("Reference to nonexistent group"); |
830247a4 | 5875 | RExC_sawback = 1; |
eb160463 GS |
5876 | ret = reganode(pRExC_state, |
5877 | (U8)(FOLD ? (LOC ? REFFL : REFF) : REF), | |
5878 | num); | |
a0d0e21e | 5879 | *flagp |= HASWIDTH; |
2af232bd | 5880 | |
fac92740 | 5881 | /* override incorrect value set in reganode MJD */ |
2af232bd | 5882 | Set_Node_Offset(ret, parse_start+1); |
fac92740 | 5883 | Set_Node_Cur_Length(ret); /* MJD */ |
830247a4 IZ |
5884 | RExC_parse--; |
5885 | nextchar(pRExC_state); | |
a0d0e21e LW |
5886 | } |
5887 | } | |
5888 | break; | |
5889 | case '\0': | |
830247a4 | 5890 | if (RExC_parse >= RExC_end) |
b45f050a | 5891 | FAIL("Trailing \\"); |
a0d0e21e LW |
5892 | /* FALL THROUGH */ |
5893 | default: | |
a0288114 | 5894 | /* Do not generate "unrecognized" warnings here, we fall |
c9f97d15 | 5895 | back into the quick-grab loop below */ |
45948336 | 5896 | parse_start--; |
a0d0e21e LW |
5897 | goto defchar; |
5898 | } | |
5899 | break; | |
4633a7c4 LW |
5900 | |
5901 | case '#': | |
e2509266 | 5902 | if (RExC_flags & PMf_EXTENDED) { |
3dab1dad YO |
5903 | while (RExC_parse < RExC_end && *RExC_parse != '\n') |
5904 | RExC_parse++; | |
830247a4 | 5905 | if (RExC_parse < RExC_end) |
4633a7c4 LW |
5906 | goto tryagain; |
5907 | } | |
5908 | /* FALL THROUGH */ | |
5909 | ||
a0d0e21e | 5910 | default: { |
ba210ebe | 5911 | register STRLEN len; |
58ae7d3f | 5912 | register UV ender; |
a0d0e21e | 5913 | register char *p; |
3dab1dad | 5914 | char *s; |
80aecb99 | 5915 | STRLEN foldlen; |
89ebb4a3 | 5916 | U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf; |
f06dbbb7 JH |
5917 | |
5918 | parse_start = RExC_parse - 1; | |
a0d0e21e | 5919 | |
830247a4 | 5920 | RExC_parse++; |
a0d0e21e LW |
5921 | |
5922 | defchar: | |
58ae7d3f | 5923 | ender = 0; |
eb160463 GS |
5924 | ret = reg_node(pRExC_state, |
5925 | (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT)); | |
cd439c50 | 5926 | s = STRING(ret); |
830247a4 IZ |
5927 | for (len = 0, p = RExC_parse - 1; |
5928 | len < 127 && p < RExC_end; | |
a0d0e21e LW |
5929 | len++) |
5930 | { | |
3dab1dad | 5931 | char * const oldp = p; |
5b5a24f7 | 5932 | |
e2509266 | 5933 | if (RExC_flags & PMf_EXTENDED) |
830247a4 | 5934 | p = regwhite(p, RExC_end); |
a0d0e21e LW |
5935 | switch (*p) { |
5936 | case '^': | |
5937 | case '$': | |
5938 | case '.': | |
5939 | case '[': | |
5940 | case '(': | |
5941 | case ')': | |
5942 | case '|': | |
5943 | goto loopdone; | |
5944 | case '\\': | |
5945 | switch (*++p) { | |
5946 | case 'A': | |
1ed8eac0 JF |
5947 | case 'C': |
5948 | case 'X': | |
a0d0e21e LW |
5949 | case 'G': |
5950 | case 'Z': | |
b85d18e9 | 5951 | case 'z': |
a0d0e21e LW |
5952 | case 'w': |
5953 | case 'W': | |
5954 | case 'b': | |
5955 | case 'B': | |
5956 | case 's': | |
5957 | case 'S': | |
5958 | case 'd': | |
5959 | case 'D': | |
a14b48bc LW |
5960 | case 'p': |
5961 | case 'P': | |
fc8cd66c | 5962 | case 'N': |
a0d0e21e LW |
5963 | --p; |
5964 | goto loopdone; | |
5965 | case 'n': | |
5966 | ender = '\n'; | |
5967 | p++; | |
a687059c | 5968 | break; |
a0d0e21e LW |
5969 | case 'r': |
5970 | ender = '\r'; | |
5971 | p++; | |
a687059c | 5972 | break; |
a0d0e21e LW |
5973 | case 't': |
5974 | ender = '\t'; | |
5975 | p++; | |
a687059c | 5976 | break; |
a0d0e21e LW |
5977 | case 'f': |
5978 | ender = '\f'; | |
5979 | p++; | |
a687059c | 5980 | break; |
a0d0e21e | 5981 | case 'e': |
c7f1f016 | 5982 | ender = ASCII_TO_NATIVE('\033'); |
a0d0e21e | 5983 | p++; |
a687059c | 5984 | break; |
a0d0e21e | 5985 | case 'a': |
c7f1f016 | 5986 | ender = ASCII_TO_NATIVE('\007'); |
a0d0e21e | 5987 | p++; |
a687059c | 5988 | break; |
a0d0e21e | 5989 | case 'x': |
a0ed51b3 | 5990 | if (*++p == '{') { |
1df70142 | 5991 | char* const e = strchr(p, '}'); |
b81d288d | 5992 | |
b45f050a | 5993 | if (!e) { |
830247a4 | 5994 | RExC_parse = p + 1; |
b45f050a JF |
5995 | vFAIL("Missing right brace on \\x{}"); |
5996 | } | |
de5f0749 | 5997 | else { |
a4c04bdc NC |
5998 | I32 flags = PERL_SCAN_ALLOW_UNDERSCORES |
5999 | | PERL_SCAN_DISALLOW_PREFIX; | |
1df70142 | 6000 | STRLEN numlen = e - p - 1; |
53305cf1 | 6001 | ender = grok_hex(p + 1, &numlen, &flags, NULL); |
aaa80028 JH |
6002 | if (ender > 0xff) |
6003 | RExC_utf8 = 1; | |
a0ed51b3 LW |
6004 | p = e + 1; |
6005 | } | |
a0ed51b3 LW |
6006 | } |
6007 | else { | |
a4c04bdc | 6008 | I32 flags = PERL_SCAN_DISALLOW_PREFIX; |
1df70142 | 6009 | STRLEN numlen = 2; |
53305cf1 | 6010 | ender = grok_hex(p, &numlen, &flags, NULL); |
a0ed51b3 LW |
6011 | p += numlen; |
6012 | } | |
a687059c | 6013 | break; |
a0d0e21e LW |
6014 | case 'c': |
6015 | p++; | |
bbce6d69 | 6016 | ender = UCHARAT(p++); |
6017 | ender = toCTRL(ender); | |
a687059c | 6018 | break; |
a0d0e21e LW |
6019 | case '0': case '1': case '2': case '3':case '4': |
6020 | case '5': case '6': case '7': case '8':case '9': | |
6021 | if (*p == '0' || | |
830247a4 | 6022 | (isDIGIT(p[1]) && atoi(p) >= RExC_npar) ) { |
53305cf1 | 6023 | I32 flags = 0; |
1df70142 | 6024 | STRLEN numlen = 3; |
53305cf1 | 6025 | ender = grok_oct(p, &numlen, &flags, NULL); |
a0d0e21e LW |
6026 | p += numlen; |
6027 | } | |
6028 | else { | |
6029 | --p; | |
6030 | goto loopdone; | |
a687059c LW |
6031 | } |
6032 | break; | |
a0d0e21e | 6033 | case '\0': |
830247a4 | 6034 | if (p >= RExC_end) |
b45f050a | 6035 | FAIL("Trailing \\"); |
a687059c | 6036 | /* FALL THROUGH */ |
a0d0e21e | 6037 | default: |
041457d9 | 6038 | if (!SIZE_ONLY&& isALPHA(*p) && ckWARN(WARN_REGEXP)) |
4193bef7 | 6039 | vWARN2(p + 1, "Unrecognized escape \\%c passed through", UCHARAT(p)); |
a0ed51b3 | 6040 | goto normal_default; |
a0d0e21e LW |
6041 | } |
6042 | break; | |
a687059c | 6043 | default: |
a0ed51b3 | 6044 | normal_default: |
fd400ab9 | 6045 | if (UTF8_IS_START(*p) && UTF) { |
1df70142 | 6046 | STRLEN numlen; |
5e12f4fb | 6047 | ender = utf8n_to_uvchr((U8*)p, RExC_end - p, |
9f7f3913 | 6048 | &numlen, UTF8_ALLOW_DEFAULT); |
a0ed51b3 LW |
6049 | p += numlen; |
6050 | } | |
6051 | else | |
6052 | ender = *p++; | |
a0d0e21e | 6053 | break; |
a687059c | 6054 | } |
e2509266 | 6055 | if (RExC_flags & PMf_EXTENDED) |
830247a4 | 6056 | p = regwhite(p, RExC_end); |
60a8b682 JH |
6057 | if (UTF && FOLD) { |
6058 | /* Prime the casefolded buffer. */ | |
ac7e0132 | 6059 | ender = toFOLD_uni(ender, tmpbuf, &foldlen); |
60a8b682 | 6060 | } |
a0d0e21e LW |
6061 | if (ISMULT2(p)) { /* Back off on ?+*. */ |
6062 | if (len) | |
6063 | p = oldp; | |
16ea2a2e | 6064 | else if (UTF) { |
80aecb99 | 6065 | if (FOLD) { |
60a8b682 | 6066 | /* Emit all the Unicode characters. */ |
1df70142 | 6067 | STRLEN numlen; |
80aecb99 JH |
6068 | for (foldbuf = tmpbuf; |
6069 | foldlen; | |
6070 | foldlen -= numlen) { | |
6071 | ender = utf8_to_uvchr(foldbuf, &numlen); | |
9dc45d57 | 6072 | if (numlen > 0) { |
71207a34 | 6073 | const STRLEN unilen = reguni(pRExC_state, ender, s); |
0ebc6274 JH |
6074 | s += unilen; |
6075 | len += unilen; | |
6076 | /* In EBCDIC the numlen | |
6077 | * and unilen can differ. */ | |
9dc45d57 | 6078 | foldbuf += numlen; |
47654450 JH |
6079 | if (numlen >= foldlen) |
6080 | break; | |
9dc45d57 JH |
6081 | } |
6082 | else | |
6083 | break; /* "Can't happen." */ | |
80aecb99 JH |
6084 | } |
6085 | } | |
6086 | else { | |
71207a34 | 6087 | const STRLEN unilen = reguni(pRExC_state, ender, s); |
9ede7db1 | 6088 | if (unilen > 0) { |
0ebc6274 JH |
6089 | s += unilen; |
6090 | len += unilen; | |
9dc45d57 | 6091 | } |
80aecb99 | 6092 | } |
a0ed51b3 | 6093 | } |
a0d0e21e LW |
6094 | else { |
6095 | len++; | |
eb160463 | 6096 | REGC((char)ender, s++); |
a0d0e21e LW |
6097 | } |
6098 | break; | |
a687059c | 6099 | } |
16ea2a2e | 6100 | if (UTF) { |
80aecb99 | 6101 | if (FOLD) { |
60a8b682 | 6102 | /* Emit all the Unicode characters. */ |
1df70142 | 6103 | STRLEN numlen; |
80aecb99 JH |
6104 | for (foldbuf = tmpbuf; |
6105 | foldlen; | |
6106 | foldlen -= numlen) { | |
6107 | ender = utf8_to_uvchr(foldbuf, &numlen); | |
9dc45d57 | 6108 | if (numlen > 0) { |
71207a34 | 6109 | const STRLEN unilen = reguni(pRExC_state, ender, s); |
0ebc6274 JH |
6110 | len += unilen; |
6111 | s += unilen; | |
6112 | /* In EBCDIC the numlen | |
6113 | * and unilen can differ. */ | |
9dc45d57 | 6114 | foldbuf += numlen; |
47654450 JH |
6115 | if (numlen >= foldlen) |
6116 | break; | |
9dc45d57 JH |
6117 | } |
6118 | else | |
6119 | break; | |
80aecb99 JH |
6120 | } |
6121 | } | |
6122 | else { | |
71207a34 | 6123 | const STRLEN unilen = reguni(pRExC_state, ender, s); |
9ede7db1 | 6124 | if (unilen > 0) { |
0ebc6274 JH |
6125 | s += unilen; |
6126 | len += unilen; | |
9dc45d57 | 6127 | } |
80aecb99 JH |
6128 | } |
6129 | len--; | |
a0ed51b3 LW |
6130 | } |
6131 | else | |
eb160463 | 6132 | REGC((char)ender, s++); |
a0d0e21e LW |
6133 | } |
6134 | loopdone: | |
830247a4 | 6135 | RExC_parse = p - 1; |
fac92740 | 6136 | Set_Node_Cur_Length(ret); /* MJD */ |
830247a4 | 6137 | nextchar(pRExC_state); |
793db0cb JH |
6138 | { |
6139 | /* len is STRLEN which is unsigned, need to copy to signed */ | |
6140 | IV iv = len; | |
6141 | if (iv < 0) | |
6142 | vFAIL("Internal disaster"); | |
6143 | } | |
a0d0e21e LW |
6144 | if (len > 0) |
6145 | *flagp |= HASWIDTH; | |
090f7165 | 6146 | if (len == 1 && UNI_IS_INVARIANT(ender)) |
a0d0e21e | 6147 | *flagp |= SIMPLE; |
3dab1dad | 6148 | |
cd439c50 | 6149 | if (SIZE_ONLY) |
830247a4 | 6150 | RExC_size += STR_SZ(len); |
3dab1dad YO |
6151 | else { |
6152 | STR_LEN(ret) = len; | |
830247a4 | 6153 | RExC_emit += STR_SZ(len); |
07be1b83 | 6154 | } |
3dab1dad | 6155 | } |
a0d0e21e LW |
6156 | break; |
6157 | } | |
a687059c | 6158 | |
60a8b682 JH |
6159 | /* If the encoding pragma is in effect recode the text of |
6160 | * any EXACT-kind nodes. */ | |
fc8cd66c | 6161 | if (ret && PL_encoding && PL_regkind[OP(ret)] == EXACT) { |
3dab1dad YO |
6162 | const STRLEN oldlen = STR_LEN(ret); |
6163 | SV * const sv = sv_2mortal(newSVpvn(STRING(ret), oldlen)); | |
d0063567 DK |
6164 | |
6165 | if (RExC_utf8) | |
6166 | SvUTF8_on(sv); | |
6167 | if (sv_utf8_downgrade(sv, TRUE)) { | |
1df70142 AL |
6168 | const char * const s = sv_recode_to_utf8(sv, PL_encoding); |
6169 | const STRLEN newlen = SvCUR(sv); | |
d0063567 DK |
6170 | |
6171 | if (SvUTF8(sv)) | |
6172 | RExC_utf8 = 1; | |
6173 | if (!SIZE_ONLY) { | |
a3621e74 YO |
6174 | GET_RE_DEBUG_FLAGS_DECL; |
6175 | DEBUG_COMPILE_r(PerlIO_printf(Perl_debug_log, "recode %*s to %*s\n", | |
d0063567 DK |
6176 | (int)oldlen, STRING(ret), |
6177 | (int)newlen, s)); | |
6178 | Copy(s, STRING(ret), newlen, char); | |
6179 | STR_LEN(ret) += newlen - oldlen; | |
6180 | RExC_emit += STR_SZ(newlen) - STR_SZ(oldlen); | |
6181 | } else | |
6182 | RExC_size += STR_SZ(newlen) - STR_SZ(oldlen); | |
6183 | } | |
a72c7584 JH |
6184 | } |
6185 | ||
a0d0e21e | 6186 | return(ret); |
a687059c LW |
6187 | } |
6188 | ||
873ef191 | 6189 | STATIC char * |
5f66b61c | 6190 | S_regwhite(char *p, const char *e) |
5b5a24f7 CS |
6191 | { |
6192 | while (p < e) { | |
6193 | if (isSPACE(*p)) | |
6194 | ++p; | |
6195 | else if (*p == '#') { | |
6196 | do { | |
6197 | p++; | |
6198 | } while (p < e && *p != '\n'); | |
6199 | } | |
6200 | else | |
6201 | break; | |
6202 | } | |
6203 | return p; | |
6204 | } | |
6205 | ||
b8c5462f JH |
6206 | /* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]]. |
6207 | Character classes ([:foo:]) can also be negated ([:^foo:]). | |
6208 | Returns a named class id (ANYOF_XXX) if successful, -1 otherwise. | |
6209 | Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed, | |
beeb77fc | 6210 | but trigger failures because they are currently unimplemented. */ |
9a86a77b JH |
6211 | |
6212 | #define POSIXCC_DONE(c) ((c) == ':') | |
6213 | #define POSIXCC_NOTYET(c) ((c) == '=' || (c) == '.') | |
6214 | #define POSIXCC(c) (POSIXCC_DONE(c) || POSIXCC_NOTYET(c)) | |
6215 | ||
b8c5462f | 6216 | STATIC I32 |
830247a4 | 6217 | S_regpposixcc(pTHX_ RExC_state_t *pRExC_state, I32 value) |
620e46c5 | 6218 | { |
97aff369 | 6219 | dVAR; |
936ed897 | 6220 | I32 namedclass = OOB_NAMEDCLASS; |
620e46c5 | 6221 | |
830247a4 | 6222 | if (value == '[' && RExC_parse + 1 < RExC_end && |
620e46c5 | 6223 | /* I smell either [: or [= or [. -- POSIX has been here, right? */ |
9a86a77b | 6224 | POSIXCC(UCHARAT(RExC_parse))) { |
1df70142 | 6225 | const char c = UCHARAT(RExC_parse); |
097eb12c | 6226 | char* const s = RExC_parse++; |
b81d288d | 6227 | |
9a86a77b | 6228 | while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != c) |
830247a4 IZ |
6229 | RExC_parse++; |
6230 | if (RExC_parse == RExC_end) | |
620e46c5 | 6231 | /* Grandfather lone [:, [=, [. */ |
830247a4 | 6232 | RExC_parse = s; |
620e46c5 | 6233 | else { |
3dab1dad | 6234 | const char* const t = RExC_parse++; /* skip over the c */ |
80916619 NC |
6235 | assert(*t == c); |
6236 | ||
9a86a77b | 6237 | if (UCHARAT(RExC_parse) == ']') { |
3dab1dad | 6238 | const char *posixcc = s + 1; |
830247a4 | 6239 | RExC_parse++; /* skip over the ending ] */ |
3dab1dad | 6240 | |
b8c5462f | 6241 | if (*s == ':') { |
1df70142 AL |
6242 | const I32 complement = *posixcc == '^' ? *posixcc++ : 0; |
6243 | const I32 skip = t - posixcc; | |
80916619 NC |
6244 | |
6245 | /* Initially switch on the length of the name. */ | |
6246 | switch (skip) { | |
6247 | case 4: | |
3dab1dad YO |
6248 | if (memEQ(posixcc, "word", 4)) /* this is not POSIX, this is the Perl \w */ |
6249 | namedclass = complement ? ANYOF_NALNUM : ANYOF_ALNUM; | |
cc4319de | 6250 | break; |
80916619 NC |
6251 | case 5: |
6252 | /* Names all of length 5. */ | |
6253 | /* alnum alpha ascii blank cntrl digit graph lower | |
6254 | print punct space upper */ | |
6255 | /* Offset 4 gives the best switch position. */ | |
6256 | switch (posixcc[4]) { | |
6257 | case 'a': | |
3dab1dad YO |
6258 | if (memEQ(posixcc, "alph", 4)) /* alpha */ |
6259 | namedclass = complement ? ANYOF_NALPHA : ANYOF_ALPHA; | |
80916619 NC |
6260 | break; |
6261 | case 'e': | |
3dab1dad YO |
6262 | if (memEQ(posixcc, "spac", 4)) /* space */ |
6263 | namedclass = complement ? ANYOF_NPSXSPC : ANYOF_PSXSPC; | |
80916619 NC |
6264 | break; |
6265 | case 'h': | |
3dab1dad YO |
6266 | if (memEQ(posixcc, "grap", 4)) /* graph */ |
6267 | namedclass = complement ? ANYOF_NGRAPH : ANYOF_GRAPH; | |
80916619 NC |
6268 | break; |
6269 | case 'i': | |
3dab1dad YO |
6270 | if (memEQ(posixcc, "asci", 4)) /* ascii */ |
6271 | namedclass = complement ? ANYOF_NASCII : ANYOF_ASCII; | |
80916619 NC |
6272 | break; |
6273 | case 'k': | |
3dab1dad YO |
6274 | if (memEQ(posixcc, "blan", 4)) /* blank */ |
6275 | namedclass = complement ? ANYOF_NBLANK : ANYOF_BLANK; | |
80916619 NC |
6276 | break; |
6277 | case 'l': | |
3dab1dad YO |
6278 | if (memEQ(posixcc, "cntr", 4)) /* cntrl */ |
6279 | namedclass = complement ? ANYOF_NCNTRL : ANYOF_CNTRL; | |
80916619 NC |
6280 | break; |
6281 | case 'm': | |
3dab1dad YO |
6282 | if (memEQ(posixcc, "alnu", 4)) /* alnum */ |
6283 | namedclass = complement ? ANYOF_NALNUMC : ANYOF_ALNUMC; | |
80916619 NC |
6284 | break; |
6285 | case 'r': | |
3dab1dad YO |
6286 | if (memEQ(posixcc, "lowe", 4)) /* lower */ |
6287 | namedclass = complement ? ANYOF_NLOWER : ANYOF_LOWER; | |
6288 | else if (memEQ(posixcc, "uppe", 4)) /* upper */ | |
6289 | namedclass = complement ? ANYOF_NUPPER : ANYOF_UPPER; | |
80916619 NC |
6290 | break; |
6291 | case 't': | |
3dab1dad YO |
6292 | if (memEQ(posixcc, "digi", 4)) /* digit */ |
6293 | namedclass = complement ? ANYOF_NDIGIT : ANYOF_DIGIT; | |
6294 | else if (memEQ(posixcc, "prin", 4)) /* print */ | |
6295 | namedclass = complement ? ANYOF_NPRINT : ANYOF_PRINT; | |
6296 | else if (memEQ(posixcc, "punc", 4)) /* punct */ | |
6297 | namedclass = complement ? ANYOF_NPUNCT : ANYOF_PUNCT; | |
80916619 | 6298 | break; |
b8c5462f JH |
6299 | } |
6300 | break; | |
80916619 | 6301 | case 6: |
3dab1dad YO |
6302 | if (memEQ(posixcc, "xdigit", 6)) |
6303 | namedclass = complement ? ANYOF_NXDIGIT : ANYOF_XDIGIT; | |
b8c5462f JH |
6304 | break; |
6305 | } | |
80916619 NC |
6306 | |
6307 | if (namedclass == OOB_NAMEDCLASS) | |
b45f050a JF |
6308 | Simple_vFAIL3("POSIX class [:%.*s:] unknown", |
6309 | t - s - 1, s + 1); | |
80916619 NC |
6310 | assert (posixcc[skip] == ':'); |
6311 | assert (posixcc[skip+1] == ']'); | |
b45f050a | 6312 | } else if (!SIZE_ONLY) { |
b8c5462f | 6313 | /* [[=foo=]] and [[.foo.]] are still future. */ |
b45f050a | 6314 | |
830247a4 | 6315 | /* adjust RExC_parse so the warning shows after |
b45f050a | 6316 | the class closes */ |
9a86a77b | 6317 | while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse) != ']') |
830247a4 | 6318 | RExC_parse++; |
b45f050a JF |
6319 | Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c); |
6320 | } | |
b8c5462f JH |
6321 | } else { |
6322 | /* Maternal grandfather: | |
6323 | * "[:" ending in ":" but not in ":]" */ | |
830247a4 | 6324 | RExC_parse = s; |
767d463e | 6325 | } |
620e46c5 JH |
6326 | } |
6327 | } | |
6328 | ||
b8c5462f JH |
6329 | return namedclass; |
6330 | } | |
6331 | ||
6332 | STATIC void | |
830247a4 | 6333 | S_checkposixcc(pTHX_ RExC_state_t *pRExC_state) |
b8c5462f | 6334 | { |
97aff369 | 6335 | dVAR; |
3dab1dad | 6336 | if (POSIXCC(UCHARAT(RExC_parse))) { |
1df70142 AL |
6337 | const char *s = RExC_parse; |
6338 | const char c = *s++; | |
b8c5462f | 6339 | |
3dab1dad | 6340 | while (isALNUM(*s)) |
b8c5462f JH |
6341 | s++; |
6342 | if (*s && c == *s && s[1] == ']') { | |
cd84f5b2 RGS |
6343 | if (ckWARN(WARN_REGEXP)) |
6344 | vWARN3(s+2, | |
6345 | "POSIX syntax [%c %c] belongs inside character classes", | |
6346 | c, c); | |
b45f050a JF |
6347 | |
6348 | /* [[=foo=]] and [[.foo.]] are still future. */ | |
9a86a77b | 6349 | if (POSIXCC_NOTYET(c)) { |
830247a4 | 6350 | /* adjust RExC_parse so the error shows after |
b45f050a | 6351 | the class closes */ |
9a86a77b | 6352 | while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse++) != ']') |
3dab1dad | 6353 | NOOP; |
b45f050a JF |
6354 | Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c); |
6355 | } | |
b8c5462f JH |
6356 | } |
6357 | } | |
620e46c5 JH |
6358 | } |
6359 | ||
7f6f358c YO |
6360 | |
6361 | /* | |
6362 | parse a class specification and produce either an ANYOF node that | |
6363 | matches the pattern. If the pattern matches a single char only and | |
6364 | that char is < 256 then we produce an EXACT node instead. | |
6365 | */ | |
76e3520e | 6366 | STATIC regnode * |
3dab1dad | 6367 | S_regclass(pTHX_ RExC_state_t *pRExC_state, U32 depth) |
a687059c | 6368 | { |
97aff369 | 6369 | dVAR; |
9ef43ace | 6370 | register UV value = 0; |
9a86a77b | 6371 | register UV nextvalue; |
3568d838 | 6372 | register IV prevvalue = OOB_UNICODE; |
ffc61ed2 | 6373 | register IV range = 0; |
c277df42 | 6374 | register regnode *ret; |
ba210ebe | 6375 | STRLEN numlen; |
ffc61ed2 | 6376 | IV namedclass; |
cbbf8932 | 6377 | char *rangebegin = NULL; |
936ed897 | 6378 | bool need_class = 0; |
c445ea15 | 6379 | SV *listsv = NULL; |
ffc61ed2 | 6380 | UV n; |
9e55ce06 | 6381 | bool optimize_invert = TRUE; |
cbbf8932 | 6382 | AV* unicode_alternate = NULL; |
1b2d223b JH |
6383 | #ifdef EBCDIC |
6384 | UV literal_endpoint = 0; | |
6385 | #endif | |
7f6f358c | 6386 | UV stored = 0; /* number of chars stored in the class */ |
ffc61ed2 | 6387 | |
3dab1dad | 6388 | regnode * const orig_emit = RExC_emit; /* Save the original RExC_emit in |
7f6f358c | 6389 | case we need to change the emitted regop to an EXACT. */ |
07be1b83 | 6390 | const char * orig_parse = RExC_parse; |
72f13be8 | 6391 | GET_RE_DEBUG_FLAGS_DECL; |
76e84362 SH |
6392 | #ifndef DEBUGGING |
6393 | PERL_UNUSED_ARG(depth); | |
6394 | #endif | |
72f13be8 | 6395 | |
3dab1dad | 6396 | DEBUG_PARSE("clas"); |
7f6f358c YO |
6397 | |
6398 | /* Assume we are going to generate an ANYOF node. */ | |
ffc61ed2 JH |
6399 | ret = reganode(pRExC_state, ANYOF, 0); |
6400 | ||
6401 | if (!SIZE_ONLY) | |
6402 | ANYOF_FLAGS(ret) = 0; | |
6403 | ||
9a86a77b | 6404 | if (UCHARAT(RExC_parse) == '^') { /* Complement of range. */ |
ffc61ed2 JH |
6405 | RExC_naughty++; |
6406 | RExC_parse++; | |
6407 | if (!SIZE_ONLY) | |
6408 | ANYOF_FLAGS(ret) |= ANYOF_INVERT; | |
6409 | } | |
a0d0e21e | 6410 | |
73060fc4 | 6411 | if (SIZE_ONLY) { |
830247a4 | 6412 | RExC_size += ANYOF_SKIP; |
73060fc4 JH |
6413 | listsv = &PL_sv_undef; /* For code scanners: listsv always non-NULL. */ |
6414 | } | |
936ed897 | 6415 | else { |
830247a4 | 6416 | RExC_emit += ANYOF_SKIP; |
936ed897 IZ |
6417 | if (FOLD) |
6418 | ANYOF_FLAGS(ret) |= ANYOF_FOLD; | |
6419 | if (LOC) | |
6420 | ANYOF_FLAGS(ret) |= ANYOF_LOCALE; | |
ffc61ed2 | 6421 | ANYOF_BITMAP_ZERO(ret); |
396482e1 | 6422 | listsv = newSVpvs("# comment\n"); |
a0d0e21e | 6423 | } |
b8c5462f | 6424 | |
9a86a77b JH |
6425 | nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0; |
6426 | ||
b938889d | 6427 | if (!SIZE_ONLY && POSIXCC(nextvalue)) |
830247a4 | 6428 | checkposixcc(pRExC_state); |
b8c5462f | 6429 | |
f064b6ad HS |
6430 | /* allow 1st char to be ] (allowing it to be - is dealt with later) */ |
6431 | if (UCHARAT(RExC_parse) == ']') | |
6432 | goto charclassloop; | |
ffc61ed2 | 6433 | |
fc8cd66c | 6434 | parseit: |
9a86a77b | 6435 | while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != ']') { |
ffc61ed2 JH |
6436 | |
6437 | charclassloop: | |
6438 | ||
6439 | namedclass = OOB_NAMEDCLASS; /* initialize as illegal */ | |
6440 | ||
73b437c8 | 6441 | if (!range) |
830247a4 | 6442 | rangebegin = RExC_parse; |
ffc61ed2 | 6443 | if (UTF) { |
5e12f4fb | 6444 | value = utf8n_to_uvchr((U8*)RExC_parse, |
3568d838 | 6445 | RExC_end - RExC_parse, |
9f7f3913 | 6446 | &numlen, UTF8_ALLOW_DEFAULT); |
ffc61ed2 JH |
6447 | RExC_parse += numlen; |
6448 | } | |
6449 | else | |
6450 | value = UCHARAT(RExC_parse++); | |
7f6f358c | 6451 | |
9a86a77b JH |
6452 | nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0; |
6453 | if (value == '[' && POSIXCC(nextvalue)) | |
830247a4 | 6454 | namedclass = regpposixcc(pRExC_state, value); |
620e46c5 | 6455 | else if (value == '\\') { |
ffc61ed2 | 6456 | if (UTF) { |
5e12f4fb | 6457 | value = utf8n_to_uvchr((U8*)RExC_parse, |
ffc61ed2 | 6458 | RExC_end - RExC_parse, |
9f7f3913 | 6459 | &numlen, UTF8_ALLOW_DEFAULT); |
ffc61ed2 JH |
6460 | RExC_parse += numlen; |
6461 | } | |
6462 | else | |
6463 | value = UCHARAT(RExC_parse++); | |
470c3474 | 6464 | /* Some compilers cannot handle switching on 64-bit integer |
ffc61ed2 | 6465 | * values, therefore value cannot be an UV. Yes, this will |
e2962f66 JH |
6466 | * be a problem later if we want switch on Unicode. |
6467 | * A similar issue a little bit later when switching on | |
6468 | * namedclass. --jhi */ | |
ffc61ed2 | 6469 | switch ((I32)value) { |
b8c5462f JH |
6470 | case 'w': namedclass = ANYOF_ALNUM; break; |
6471 | case 'W': namedclass = ANYOF_NALNUM; break; | |
6472 | case 's': namedclass = ANYOF_SPACE; break; | |
6473 | case 'S': namedclass = ANYOF_NSPACE; break; | |
6474 | case 'd': namedclass = ANYOF_DIGIT; break; | |
6475 | case 'D': namedclass = ANYOF_NDIGIT; break; | |
fc8cd66c YO |
6476 | case 'N': /* Handle \N{NAME} in class */ |
6477 | { | |
6478 | /* We only pay attention to the first char of | |
6479 | multichar strings being returned. I kinda wonder | |
6480 | if this makes sense as it does change the behaviour | |
6481 | from earlier versions, OTOH that behaviour was broken | |
6482 | as well. */ | |
6483 | UV v; /* value is register so we cant & it /grrr */ | |
6484 | if (reg_namedseq(pRExC_state, &v)) { | |
6485 | goto parseit; | |
6486 | } | |
6487 | value= v; | |
6488 | } | |
6489 | break; | |
ffc61ed2 JH |
6490 | case 'p': |
6491 | case 'P': | |
3dab1dad YO |
6492 | { |
6493 | char *e; | |
af6f566e | 6494 | if (RExC_parse >= RExC_end) |
2a4859cd | 6495 | vFAIL2("Empty \\%c{}", (U8)value); |
ffc61ed2 | 6496 | if (*RExC_parse == '{') { |
1df70142 | 6497 | const U8 c = (U8)value; |
ffc61ed2 JH |
6498 | e = strchr(RExC_parse++, '}'); |
6499 | if (!e) | |
0da60cf5 | 6500 | vFAIL2("Missing right brace on \\%c{}", c); |
ab13f0c7 JH |
6501 | while (isSPACE(UCHARAT(RExC_parse))) |
6502 | RExC_parse++; | |
6503 | if (e == RExC_parse) | |
0da60cf5 | 6504 | vFAIL2("Empty \\%c{}", c); |
ffc61ed2 | 6505 | n = e - RExC_parse; |
ab13f0c7 JH |
6506 | while (isSPACE(UCHARAT(RExC_parse + n - 1))) |
6507 | n--; | |
ffc61ed2 JH |
6508 | } |
6509 | else { | |
6510 | e = RExC_parse; | |
6511 | n = 1; | |
6512 | } | |
6513 | if (!SIZE_ONLY) { | |
ab13f0c7 JH |
6514 | if (UCHARAT(RExC_parse) == '^') { |
6515 | RExC_parse++; | |
6516 | n--; | |
6517 | value = value == 'p' ? 'P' : 'p'; /* toggle */ | |
6518 | while (isSPACE(UCHARAT(RExC_parse))) { | |
6519 | RExC_parse++; | |
6520 | n--; | |
6521 | } | |
6522 | } | |
097eb12c AL |
6523 | Perl_sv_catpvf(aTHX_ listsv, "%cutf8::%.*s\n", |
6524 | (value=='p' ? '+' : '!'), (int)n, RExC_parse); | |
ffc61ed2 JH |
6525 | } |
6526 | RExC_parse = e + 1; | |
6527 | ANYOF_FLAGS(ret) |= ANYOF_UNICODE; | |
f81125e2 | 6528 | namedclass = ANYOF_MAX; /* no official name, but it's named */ |
3dab1dad | 6529 | } |
f81125e2 | 6530 | break; |
b8c5462f JH |
6531 | case 'n': value = '\n'; break; |
6532 | case 'r': value = '\r'; break; | |
6533 | case 't': value = '\t'; break; | |
6534 | case 'f': value = '\f'; break; | |
6535 | case 'b': value = '\b'; break; | |
c7f1f016 NIS |
6536 | case 'e': value = ASCII_TO_NATIVE('\033');break; |
6537 | case 'a': value = ASCII_TO_NATIVE('\007');break; | |
b8c5462f | 6538 | case 'x': |
ffc61ed2 | 6539 | if (*RExC_parse == '{') { |
a4c04bdc NC |
6540 | I32 flags = PERL_SCAN_ALLOW_UNDERSCORES |
6541 | | PERL_SCAN_DISALLOW_PREFIX; | |
3dab1dad | 6542 | char * const e = strchr(RExC_parse++, '}'); |
b81d288d | 6543 | if (!e) |
ffc61ed2 | 6544 | vFAIL("Missing right brace on \\x{}"); |
53305cf1 NC |
6545 | |
6546 | numlen = e - RExC_parse; | |
6547 | value = grok_hex(RExC_parse, &numlen, &flags, NULL); | |
ffc61ed2 JH |
6548 | RExC_parse = e + 1; |
6549 | } | |
6550 | else { | |
a4c04bdc | 6551 | I32 flags = PERL_SCAN_DISALLOW_PREFIX; |
53305cf1 NC |
6552 | numlen = 2; |
6553 | value = grok_hex(RExC_parse, &numlen, &flags, NULL); | |
ffc61ed2 JH |
6554 | RExC_parse += numlen; |
6555 | } | |
b8c5462f JH |
6556 | break; |
6557 | case 'c': | |
830247a4 | 6558 | value = UCHARAT(RExC_parse++); |
b8c5462f JH |
6559 | value = toCTRL(value); |
6560 | break; | |
6561 | case '0': case '1': case '2': case '3': case '4': | |
6562 | case '5': case '6': case '7': case '8': case '9': | |
53305cf1 NC |
6563 | { |
6564 | I32 flags = 0; | |
6565 | numlen = 3; | |
6566 | value = grok_oct(--RExC_parse, &numlen, &flags, NULL); | |
830247a4 | 6567 | RExC_parse += numlen; |
b8c5462f | 6568 | break; |
53305cf1 | 6569 | } |
1028017a | 6570 | default: |
041457d9 | 6571 | if (!SIZE_ONLY && isALPHA(value) && ckWARN(WARN_REGEXP)) |
ffc61ed2 JH |
6572 | vWARN2(RExC_parse, |
6573 | "Unrecognized escape \\%c in character class passed through", | |
6574 | (int)value); | |
1028017a | 6575 | break; |
b8c5462f | 6576 | } |
ffc61ed2 | 6577 | } /* end of \blah */ |
1b2d223b JH |
6578 | #ifdef EBCDIC |
6579 | else | |
6580 | literal_endpoint++; | |
6581 | #endif | |
ffc61ed2 JH |
6582 | |
6583 | if (namedclass > OOB_NAMEDCLASS) { /* this is a named class \blah */ | |
6584 | ||
6585 | if (!SIZE_ONLY && !need_class) | |
936ed897 | 6586 | ANYOF_CLASS_ZERO(ret); |
ffc61ed2 | 6587 | |
936ed897 | 6588 | need_class = 1; |
ffc61ed2 JH |
6589 | |
6590 | /* a bad range like a-\d, a-[:digit:] ? */ | |
6591 | if (range) { | |
73b437c8 | 6592 | if (!SIZE_ONLY) { |
afd78fd5 | 6593 | if (ckWARN(WARN_REGEXP)) { |
097eb12c | 6594 | const int w = |
afd78fd5 JH |
6595 | RExC_parse >= rangebegin ? |
6596 | RExC_parse - rangebegin : 0; | |
830247a4 | 6597 | vWARN4(RExC_parse, |
b45f050a | 6598 | "False [] range \"%*.*s\"", |
097eb12c | 6599 | w, w, rangebegin); |
afd78fd5 | 6600 | } |
3568d838 JH |
6601 | if (prevvalue < 256) { |
6602 | ANYOF_BITMAP_SET(ret, prevvalue); | |
ffc61ed2 JH |
6603 | ANYOF_BITMAP_SET(ret, '-'); |
6604 | } | |
6605 | else { | |
6606 | ANYOF_FLAGS(ret) |= ANYOF_UNICODE; | |
6607 | Perl_sv_catpvf(aTHX_ listsv, | |
3568d838 | 6608 | "%04"UVxf"\n%04"UVxf"\n", (UV)prevvalue, (UV) '-'); |
ffc61ed2 | 6609 | } |
b8c5462f | 6610 | } |
ffc61ed2 JH |
6611 | |
6612 | range = 0; /* this was not a true range */ | |
73b437c8 | 6613 | } |
ffc61ed2 | 6614 | |
73b437c8 | 6615 | if (!SIZE_ONLY) { |
c49a72a9 NC |
6616 | const char *what = NULL; |
6617 | char yesno = 0; | |
6618 | ||
3568d838 JH |
6619 | if (namedclass > OOB_NAMEDCLASS) |
6620 | optimize_invert = FALSE; | |
e2962f66 JH |
6621 | /* Possible truncation here but in some 64-bit environments |
6622 | * the compiler gets heartburn about switch on 64-bit values. | |
6623 | * A similar issue a little earlier when switching on value. | |
98f323fa | 6624 | * --jhi */ |
e2962f66 | 6625 | switch ((I32)namedclass) { |
73b437c8 JH |
6626 | case ANYOF_ALNUM: |
6627 | if (LOC) | |
936ed897 | 6628 | ANYOF_CLASS_SET(ret, ANYOF_ALNUM); |
73b437c8 JH |
6629 | else { |
6630 | for (value = 0; value < 256; value++) | |
6631 | if (isALNUM(value)) | |
936ed897 | 6632 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6633 | } |
c49a72a9 NC |
6634 | yesno = '+'; |
6635 | what = "Word"; | |
73b437c8 JH |
6636 | break; |
6637 | case ANYOF_NALNUM: | |
6638 | if (LOC) | |
936ed897 | 6639 | ANYOF_CLASS_SET(ret, ANYOF_NALNUM); |
73b437c8 JH |
6640 | else { |
6641 | for (value = 0; value < 256; value++) | |
6642 | if (!isALNUM(value)) | |
936ed897 | 6643 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6644 | } |
c49a72a9 NC |
6645 | yesno = '!'; |
6646 | what = "Word"; | |
73b437c8 | 6647 | break; |
ffc61ed2 | 6648 | case ANYOF_ALNUMC: |
73b437c8 | 6649 | if (LOC) |
ffc61ed2 | 6650 | ANYOF_CLASS_SET(ret, ANYOF_ALNUMC); |
73b437c8 JH |
6651 | else { |
6652 | for (value = 0; value < 256; value++) | |
ffc61ed2 | 6653 | if (isALNUMC(value)) |
936ed897 | 6654 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6655 | } |
c49a72a9 NC |
6656 | yesno = '+'; |
6657 | what = "Alnum"; | |
73b437c8 JH |
6658 | break; |
6659 | case ANYOF_NALNUMC: | |
6660 | if (LOC) | |
936ed897 | 6661 | ANYOF_CLASS_SET(ret, ANYOF_NALNUMC); |
73b437c8 JH |
6662 | else { |
6663 | for (value = 0; value < 256; value++) | |
6664 | if (!isALNUMC(value)) | |
936ed897 | 6665 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6666 | } |
c49a72a9 NC |
6667 | yesno = '!'; |
6668 | what = "Alnum"; | |
73b437c8 JH |
6669 | break; |
6670 | case ANYOF_ALPHA: | |
6671 | if (LOC) | |
936ed897 | 6672 | ANYOF_CLASS_SET(ret, ANYOF_ALPHA); |
73b437c8 JH |
6673 | else { |
6674 | for (value = 0; value < 256; value++) | |
6675 | if (isALPHA(value)) | |
936ed897 | 6676 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6677 | } |
c49a72a9 NC |
6678 | yesno = '+'; |
6679 | what = "Alpha"; | |
73b437c8 JH |
6680 | break; |
6681 | case ANYOF_NALPHA: | |
6682 | if (LOC) | |
936ed897 | 6683 | ANYOF_CLASS_SET(ret, ANYOF_NALPHA); |
73b437c8 JH |
6684 | else { |
6685 | for (value = 0; value < 256; value++) | |
6686 | if (!isALPHA(value)) | |
936ed897 | 6687 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6688 | } |
c49a72a9 NC |
6689 | yesno = '!'; |
6690 | what = "Alpha"; | |
73b437c8 JH |
6691 | break; |
6692 | case ANYOF_ASCII: | |
6693 | if (LOC) | |
936ed897 | 6694 | ANYOF_CLASS_SET(ret, ANYOF_ASCII); |
73b437c8 | 6695 | else { |
c7f1f016 | 6696 | #ifndef EBCDIC |
1ba5c669 JH |
6697 | for (value = 0; value < 128; value++) |
6698 | ANYOF_BITMAP_SET(ret, value); | |
6699 | #else /* EBCDIC */ | |
ffbc6a93 | 6700 | for (value = 0; value < 256; value++) { |
3a3c4447 JH |
6701 | if (isASCII(value)) |
6702 | ANYOF_BITMAP_SET(ret, value); | |
ffbc6a93 | 6703 | } |
1ba5c669 | 6704 | #endif /* EBCDIC */ |
73b437c8 | 6705 | } |
c49a72a9 NC |
6706 | yesno = '+'; |
6707 | what = "ASCII"; | |
73b437c8 JH |
6708 | break; |
6709 | case ANYOF_NASCII: | |
6710 | if (LOC) | |
936ed897 | 6711 | ANYOF_CLASS_SET(ret, ANYOF_NASCII); |
73b437c8 | 6712 | else { |
c7f1f016 | 6713 | #ifndef EBCDIC |
1ba5c669 JH |
6714 | for (value = 128; value < 256; value++) |
6715 | ANYOF_BITMAP_SET(ret, value); | |
6716 | #else /* EBCDIC */ | |
ffbc6a93 | 6717 | for (value = 0; value < 256; value++) { |
3a3c4447 JH |
6718 | if (!isASCII(value)) |
6719 | ANYOF_BITMAP_SET(ret, value); | |
ffbc6a93 | 6720 | } |
1ba5c669 | 6721 | #endif /* EBCDIC */ |
73b437c8 | 6722 | } |
c49a72a9 NC |
6723 | yesno = '!'; |
6724 | what = "ASCII"; | |
73b437c8 | 6725 | break; |
aaa51d5e JF |
6726 | case ANYOF_BLANK: |
6727 | if (LOC) | |
6728 | ANYOF_CLASS_SET(ret, ANYOF_BLANK); | |
6729 | else { | |
6730 | for (value = 0; value < 256; value++) | |
6731 | if (isBLANK(value)) | |
6732 | ANYOF_BITMAP_SET(ret, value); | |
6733 | } | |
c49a72a9 NC |
6734 | yesno = '+'; |
6735 | what = "Blank"; | |
aaa51d5e JF |
6736 | break; |
6737 | case ANYOF_NBLANK: | |
6738 | if (LOC) | |
6739 | ANYOF_CLASS_SET(ret, ANYOF_NBLANK); | |
6740 | else { | |
6741 | for (value = 0; value < 256; value++) | |
6742 | if (!isBLANK(value)) | |
6743 | ANYOF_BITMAP_SET(ret, value); | |
6744 | } | |
c49a72a9 NC |
6745 | yesno = '!'; |
6746 | what = "Blank"; | |
aaa51d5e | 6747 | break; |
73b437c8 JH |
6748 | case ANYOF_CNTRL: |
6749 | if (LOC) | |
936ed897 | 6750 | ANYOF_CLASS_SET(ret, ANYOF_CNTRL); |
73b437c8 JH |
6751 | else { |
6752 | for (value = 0; value < 256; value++) | |
6753 | if (isCNTRL(value)) | |
936ed897 | 6754 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6755 | } |
c49a72a9 NC |
6756 | yesno = '+'; |
6757 | what = "Cntrl"; | |
73b437c8 JH |
6758 | break; |
6759 | case ANYOF_NCNTRL: | |
6760 | if (LOC) | |
936ed897 | 6761 | ANYOF_CLASS_SET(ret, ANYOF_NCNTRL); |
73b437c8 JH |
6762 | else { |
6763 | for (value = 0; value < 256; value++) | |
6764 | if (!isCNTRL(value)) | |
936ed897 | 6765 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6766 | } |
c49a72a9 NC |
6767 | yesno = '!'; |
6768 | what = "Cntrl"; | |
ffc61ed2 JH |
6769 | break; |
6770 | case ANYOF_DIGIT: | |
6771 | if (LOC) | |
6772 | ANYOF_CLASS_SET(ret, ANYOF_DIGIT); | |
6773 | else { | |
6774 | /* consecutive digits assumed */ | |
6775 | for (value = '0'; value <= '9'; value++) | |
6776 | ANYOF_BITMAP_SET(ret, value); | |
6777 | } | |
c49a72a9 NC |
6778 | yesno = '+'; |
6779 | what = "Digit"; | |
ffc61ed2 JH |
6780 | break; |
6781 | case ANYOF_NDIGIT: | |
6782 | if (LOC) | |
6783 | ANYOF_CLASS_SET(ret, ANYOF_NDIGIT); | |
6784 | else { | |
6785 | /* consecutive digits assumed */ | |
6786 | for (value = 0; value < '0'; value++) | |
6787 | ANYOF_BITMAP_SET(ret, value); | |
6788 | for (value = '9' + 1; value < 256; value++) | |
6789 | ANYOF_BITMAP_SET(ret, value); | |
6790 | } | |
c49a72a9 NC |
6791 | yesno = '!'; |
6792 | what = "Digit"; | |
73b437c8 JH |
6793 | break; |
6794 | case ANYOF_GRAPH: | |
6795 | if (LOC) | |
936ed897 | 6796 | ANYOF_CLASS_SET(ret, ANYOF_GRAPH); |
73b437c8 JH |
6797 | else { |
6798 | for (value = 0; value < 256; value++) | |
6799 | if (isGRAPH(value)) | |
936ed897 | 6800 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6801 | } |
c49a72a9 NC |
6802 | yesno = '+'; |
6803 | what = "Graph"; | |
73b437c8 JH |
6804 | break; |
6805 | case ANYOF_NGRAPH: | |
6806 | if (LOC) | |
936ed897 | 6807 | ANYOF_CLASS_SET(ret, ANYOF_NGRAPH); |
73b437c8 JH |
6808 | else { |
6809 | for (value = 0; value < 256; value++) | |
6810 | if (!isGRAPH(value)) | |
936ed897 | 6811 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6812 | } |
c49a72a9 NC |
6813 | yesno = '!'; |
6814 | what = "Graph"; | |
73b437c8 JH |
6815 | break; |
6816 | case ANYOF_LOWER: | |
6817 | if (LOC) | |
936ed897 | 6818 | ANYOF_CLASS_SET(ret, ANYOF_LOWER); |
73b437c8 JH |
6819 | else { |
6820 | for (value = 0; value < 256; value++) | |
6821 | if (isLOWER(value)) | |
936ed897 | 6822 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6823 | } |
c49a72a9 NC |
6824 | yesno = '+'; |
6825 | what = "Lower"; | |
73b437c8 JH |
6826 | break; |
6827 | case ANYOF_NLOWER: | |
6828 | if (LOC) | |
936ed897 | 6829 | ANYOF_CLASS_SET(ret, ANYOF_NLOWER); |
73b437c8 JH |
6830 | else { |
6831 | for (value = 0; value < 256; value++) | |
6832 | if (!isLOWER(value)) | |
936ed897 | 6833 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6834 | } |
c49a72a9 NC |
6835 | yesno = '!'; |
6836 | what = "Lower"; | |
73b437c8 JH |
6837 | break; |
6838 | case ANYOF_PRINT: | |
6839 | if (LOC) | |
936ed897 | 6840 | ANYOF_CLASS_SET(ret, ANYOF_PRINT); |
73b437c8 JH |
6841 | else { |
6842 | for (value = 0; value < 256; value++) | |
6843 | if (isPRINT(value)) | |
936ed897 | 6844 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6845 | } |
c49a72a9 NC |
6846 | yesno = '+'; |
6847 | what = "Print"; | |
73b437c8 JH |
6848 | break; |
6849 | case ANYOF_NPRINT: | |
6850 | if (LOC) | |
936ed897 | 6851 | ANYOF_CLASS_SET(ret, ANYOF_NPRINT); |
73b437c8 JH |
6852 | else { |
6853 | for (value = 0; value < 256; value++) | |
6854 | if (!isPRINT(value)) | |
936ed897 | 6855 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6856 | } |
c49a72a9 NC |
6857 | yesno = '!'; |
6858 | what = "Print"; | |
73b437c8 | 6859 | break; |
aaa51d5e JF |
6860 | case ANYOF_PSXSPC: |
6861 | if (LOC) | |
6862 | ANYOF_CLASS_SET(ret, ANYOF_PSXSPC); | |
6863 | else { | |
6864 | for (value = 0; value < 256; value++) | |
6865 | if (isPSXSPC(value)) | |
6866 | ANYOF_BITMAP_SET(ret, value); | |
6867 | } | |
c49a72a9 NC |
6868 | yesno = '+'; |
6869 | what = "Space"; | |
aaa51d5e JF |
6870 | break; |
6871 | case ANYOF_NPSXSPC: | |
6872 | if (LOC) | |
6873 | ANYOF_CLASS_SET(ret, ANYOF_NPSXSPC); | |
6874 | else { | |
6875 | for (value = 0; value < 256; value++) | |
6876 | if (!isPSXSPC(value)) | |
6877 | ANYOF_BITMAP_SET(ret, value); | |
6878 | } | |
c49a72a9 NC |
6879 | yesno = '!'; |
6880 | what = "Space"; | |
aaa51d5e | 6881 | break; |
73b437c8 JH |
6882 | case ANYOF_PUNCT: |
6883 | if (LOC) | |
936ed897 | 6884 | ANYOF_CLASS_SET(ret, ANYOF_PUNCT); |
73b437c8 JH |
6885 | else { |
6886 | for (value = 0; value < 256; value++) | |
6887 | if (isPUNCT(value)) | |
936ed897 | 6888 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6889 | } |
c49a72a9 NC |
6890 | yesno = '+'; |
6891 | what = "Punct"; | |
73b437c8 JH |
6892 | break; |
6893 | case ANYOF_NPUNCT: | |
6894 | if (LOC) | |
936ed897 | 6895 | ANYOF_CLASS_SET(ret, ANYOF_NPUNCT); |
73b437c8 JH |
6896 | else { |
6897 | for (value = 0; value < 256; value++) | |
6898 | if (!isPUNCT(value)) | |
936ed897 | 6899 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6900 | } |
c49a72a9 NC |
6901 | yesno = '!'; |
6902 | what = "Punct"; | |
ffc61ed2 JH |
6903 | break; |
6904 | case ANYOF_SPACE: | |
6905 | if (LOC) | |
6906 | ANYOF_CLASS_SET(ret, ANYOF_SPACE); | |
6907 | else { | |
6908 | for (value = 0; value < 256; value++) | |
6909 | if (isSPACE(value)) | |
6910 | ANYOF_BITMAP_SET(ret, value); | |
6911 | } | |
c49a72a9 NC |
6912 | yesno = '+'; |
6913 | what = "SpacePerl"; | |
ffc61ed2 JH |
6914 | break; |
6915 | case ANYOF_NSPACE: | |
6916 | if (LOC) | |
6917 | ANYOF_CLASS_SET(ret, ANYOF_NSPACE); | |
6918 | else { | |
6919 | for (value = 0; value < 256; value++) | |
6920 | if (!isSPACE(value)) | |
6921 | ANYOF_BITMAP_SET(ret, value); | |
6922 | } | |
c49a72a9 NC |
6923 | yesno = '!'; |
6924 | what = "SpacePerl"; | |
73b437c8 JH |
6925 | break; |
6926 | case ANYOF_UPPER: | |
6927 | if (LOC) | |
936ed897 | 6928 | ANYOF_CLASS_SET(ret, ANYOF_UPPER); |
73b437c8 JH |
6929 | else { |
6930 | for (value = 0; value < 256; value++) | |
6931 | if (isUPPER(value)) | |
936ed897 | 6932 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6933 | } |
c49a72a9 NC |
6934 | yesno = '+'; |
6935 | what = "Upper"; | |
73b437c8 JH |
6936 | break; |
6937 | case ANYOF_NUPPER: | |
6938 | if (LOC) | |
936ed897 | 6939 | ANYOF_CLASS_SET(ret, ANYOF_NUPPER); |
73b437c8 JH |
6940 | else { |
6941 | for (value = 0; value < 256; value++) | |
6942 | if (!isUPPER(value)) | |
936ed897 | 6943 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6944 | } |
c49a72a9 NC |
6945 | yesno = '!'; |
6946 | what = "Upper"; | |
73b437c8 JH |
6947 | break; |
6948 | case ANYOF_XDIGIT: | |
6949 | if (LOC) | |
936ed897 | 6950 | ANYOF_CLASS_SET(ret, ANYOF_XDIGIT); |
73b437c8 JH |
6951 | else { |
6952 | for (value = 0; value < 256; value++) | |
6953 | if (isXDIGIT(value)) | |
936ed897 | 6954 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6955 | } |
c49a72a9 NC |
6956 | yesno = '+'; |
6957 | what = "XDigit"; | |
73b437c8 JH |
6958 | break; |
6959 | case ANYOF_NXDIGIT: | |
6960 | if (LOC) | |
936ed897 | 6961 | ANYOF_CLASS_SET(ret, ANYOF_NXDIGIT); |
73b437c8 JH |
6962 | else { |
6963 | for (value = 0; value < 256; value++) | |
6964 | if (!isXDIGIT(value)) | |
936ed897 | 6965 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6966 | } |
c49a72a9 NC |
6967 | yesno = '!'; |
6968 | what = "XDigit"; | |
73b437c8 | 6969 | break; |
f81125e2 JP |
6970 | case ANYOF_MAX: |
6971 | /* this is to handle \p and \P */ | |
6972 | break; | |
73b437c8 | 6973 | default: |
b45f050a | 6974 | vFAIL("Invalid [::] class"); |
73b437c8 | 6975 | break; |
b8c5462f | 6976 | } |
c49a72a9 NC |
6977 | if (what) { |
6978 | /* Strings such as "+utf8::isWord\n" */ | |
6979 | Perl_sv_catpvf(aTHX_ listsv, "%cutf8::Is%s\n", yesno, what); | |
6980 | } | |
b8c5462f | 6981 | if (LOC) |
936ed897 | 6982 | ANYOF_FLAGS(ret) |= ANYOF_CLASS; |
73b437c8 | 6983 | continue; |
a0d0e21e | 6984 | } |
ffc61ed2 JH |
6985 | } /* end of namedclass \blah */ |
6986 | ||
a0d0e21e | 6987 | if (range) { |
eb160463 | 6988 | if (prevvalue > (IV)value) /* b-a */ { |
d4c19fe8 AL |
6989 | const int w = RExC_parse - rangebegin; |
6990 | Simple_vFAIL4("Invalid [] range \"%*.*s\"", w, w, rangebegin); | |
3568d838 | 6991 | range = 0; /* not a valid range */ |
73b437c8 | 6992 | } |
a0d0e21e LW |
6993 | } |
6994 | else { | |
3568d838 | 6995 | prevvalue = value; /* save the beginning of the range */ |
830247a4 IZ |
6996 | if (*RExC_parse == '-' && RExC_parse+1 < RExC_end && |
6997 | RExC_parse[1] != ']') { | |
6998 | RExC_parse++; | |
ffc61ed2 JH |
6999 | |
7000 | /* a bad range like \w-, [:word:]- ? */ | |
7001 | if (namedclass > OOB_NAMEDCLASS) { | |
afd78fd5 | 7002 | if (ckWARN(WARN_REGEXP)) { |
d4c19fe8 | 7003 | const int w = |
afd78fd5 JH |
7004 | RExC_parse >= rangebegin ? |
7005 | RExC_parse - rangebegin : 0; | |
830247a4 | 7006 | vWARN4(RExC_parse, |
b45f050a | 7007 | "False [] range \"%*.*s\"", |
097eb12c | 7008 | w, w, rangebegin); |
afd78fd5 | 7009 | } |
73b437c8 | 7010 | if (!SIZE_ONLY) |
936ed897 | 7011 | ANYOF_BITMAP_SET(ret, '-'); |
73b437c8 | 7012 | } else |
ffc61ed2 JH |
7013 | range = 1; /* yeah, it's a range! */ |
7014 | continue; /* but do it the next time */ | |
a0d0e21e | 7015 | } |
a687059c | 7016 | } |
ffc61ed2 | 7017 | |
93733859 | 7018 | /* now is the next time */ |
07be1b83 | 7019 | /*stored += (value - prevvalue + 1);*/ |
ae5c130c | 7020 | if (!SIZE_ONLY) { |
3568d838 | 7021 | if (prevvalue < 256) { |
1df70142 | 7022 | const IV ceilvalue = value < 256 ? value : 255; |
3dab1dad | 7023 | IV i; |
3568d838 | 7024 | #ifdef EBCDIC |
1b2d223b JH |
7025 | /* In EBCDIC [\x89-\x91] should include |
7026 | * the \x8e but [i-j] should not. */ | |
7027 | if (literal_endpoint == 2 && | |
7028 | ((isLOWER(prevvalue) && isLOWER(ceilvalue)) || | |
7029 | (isUPPER(prevvalue) && isUPPER(ceilvalue)))) | |
ffc61ed2 | 7030 | { |
3568d838 JH |
7031 | if (isLOWER(prevvalue)) { |
7032 | for (i = prevvalue; i <= ceilvalue; i++) | |
ffc61ed2 JH |
7033 | if (isLOWER(i)) |
7034 | ANYOF_BITMAP_SET(ret, i); | |
7035 | } else { | |
3568d838 | 7036 | for (i = prevvalue; i <= ceilvalue; i++) |
ffc61ed2 JH |
7037 | if (isUPPER(i)) |
7038 | ANYOF_BITMAP_SET(ret, i); | |
7039 | } | |
8ada0baa | 7040 | } |
ffc61ed2 | 7041 | else |
8ada0baa | 7042 | #endif |
07be1b83 YO |
7043 | for (i = prevvalue; i <= ceilvalue; i++) { |
7044 | if (!ANYOF_BITMAP_TEST(ret,i)) { | |
7045 | stored++; | |
7046 | ANYOF_BITMAP_SET(ret, i); | |
7047 | } | |
7048 | } | |
3568d838 | 7049 | } |
a5961de5 | 7050 | if (value > 255 || UTF) { |
1df70142 AL |
7051 | const UV prevnatvalue = NATIVE_TO_UNI(prevvalue); |
7052 | const UV natvalue = NATIVE_TO_UNI(value); | |
07be1b83 | 7053 | stored+=2; /* can't optimize this class */ |
ffc61ed2 | 7054 | ANYOF_FLAGS(ret) |= ANYOF_UNICODE; |
b08decb7 | 7055 | if (prevnatvalue < natvalue) { /* what about > ? */ |
ffc61ed2 | 7056 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\t%04"UVxf"\n", |
b08decb7 JH |
7057 | prevnatvalue, natvalue); |
7058 | } | |
7059 | else if (prevnatvalue == natvalue) { | |
7060 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", natvalue); | |
09091399 | 7061 | if (FOLD) { |
89ebb4a3 | 7062 | U8 foldbuf[UTF8_MAXBYTES_CASE+1]; |
254ba52a | 7063 | STRLEN foldlen; |
1df70142 | 7064 | const UV f = to_uni_fold(natvalue, foldbuf, &foldlen); |
254ba52a | 7065 | |
e294cc5d JH |
7066 | #ifdef EBCDIC /* RD t/uni/fold ff and 6b */ |
7067 | if (RExC_precomp[0] == ':' && | |
7068 | RExC_precomp[1] == '[' && | |
7069 | (f == 0xDF || f == 0x92)) { | |
7070 | f = NATIVE_TO_UNI(f); | |
7071 | } | |
7072 | #endif | |
c840d2a2 JH |
7073 | /* If folding and foldable and a single |
7074 | * character, insert also the folded version | |
7075 | * to the charclass. */ | |
9e55ce06 | 7076 | if (f != value) { |
e294cc5d JH |
7077 | #ifdef EBCDIC /* RD tunifold ligatures s,t fb05, fb06 */ |
7078 | if ((RExC_precomp[0] == ':' && | |
7079 | RExC_precomp[1] == '[' && | |
7080 | (f == 0xA2 && | |
7081 | (value == 0xFB05 || value == 0xFB06))) ? | |
7082 | foldlen == ((STRLEN)UNISKIP(f) - 1) : | |
7083 | foldlen == (STRLEN)UNISKIP(f) ) | |
7084 | #else | |
eb160463 | 7085 | if (foldlen == (STRLEN)UNISKIP(f)) |
e294cc5d | 7086 | #endif |
9e55ce06 JH |
7087 | Perl_sv_catpvf(aTHX_ listsv, |
7088 | "%04"UVxf"\n", f); | |
7089 | else { | |
7090 | /* Any multicharacter foldings | |
7091 | * require the following transform: | |
7092 | * [ABCDEF] -> (?:[ABCabcDEFd]|pq|rst) | |
7093 | * where E folds into "pq" and F folds | |
7094 | * into "rst", all other characters | |
7095 | * fold to single characters. We save | |
7096 | * away these multicharacter foldings, | |
7097 | * to be later saved as part of the | |
7098 | * additional "s" data. */ | |
7099 | SV *sv; | |
7100 | ||
7101 | if (!unicode_alternate) | |
7102 | unicode_alternate = newAV(); | |
7103 | sv = newSVpvn((char*)foldbuf, foldlen); | |
7104 | SvUTF8_on(sv); | |
7105 | av_push(unicode_alternate, sv); | |
7106 | } | |
7107 | } | |
254ba52a | 7108 | |
60a8b682 JH |
7109 | /* If folding and the value is one of the Greek |
7110 | * sigmas insert a few more sigmas to make the | |
7111 | * folding rules of the sigmas to work right. | |
7112 | * Note that not all the possible combinations | |
7113 | * are handled here: some of them are handled | |
9e55ce06 JH |
7114 | * by the standard folding rules, and some of |
7115 | * them (literal or EXACTF cases) are handled | |
7116 | * during runtime in regexec.c:S_find_byclass(). */ | |
09091399 JH |
7117 | if (value == UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA) { |
7118 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", | |
eb050b28 | 7119 | (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA); |
09091399 | 7120 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", |
eb050b28 | 7121 | (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA); |
09091399 JH |
7122 | } |
7123 | else if (value == UNICODE_GREEK_CAPITAL_LETTER_SIGMA) | |
7124 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", | |
eb050b28 | 7125 | (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA); |
09091399 JH |
7126 | } |
7127 | } | |
ffc61ed2 | 7128 | } |
1b2d223b JH |
7129 | #ifdef EBCDIC |
7130 | literal_endpoint = 0; | |
7131 | #endif | |
8ada0baa | 7132 | } |
ffc61ed2 JH |
7133 | |
7134 | range = 0; /* this range (if it was one) is done now */ | |
a0d0e21e | 7135 | } |
ffc61ed2 | 7136 | |
936ed897 | 7137 | if (need_class) { |
4f66b38d | 7138 | ANYOF_FLAGS(ret) |= ANYOF_LARGE; |
936ed897 | 7139 | if (SIZE_ONLY) |
830247a4 | 7140 | RExC_size += ANYOF_CLASS_ADD_SKIP; |
936ed897 | 7141 | else |
830247a4 | 7142 | RExC_emit += ANYOF_CLASS_ADD_SKIP; |
936ed897 | 7143 | } |
ffc61ed2 | 7144 | |
7f6f358c YO |
7145 | |
7146 | if (SIZE_ONLY) | |
7147 | return ret; | |
7148 | /****** !SIZE_ONLY AFTER HERE *********/ | |
7149 | ||
7150 | if( stored == 1 && value < 256 | |
7151 | && !( ANYOF_FLAGS(ret) & ( ANYOF_FLAGS_ALL ^ ANYOF_FOLD ) ) | |
7152 | ) { | |
7153 | /* optimize single char class to an EXACT node | |
7154 | but *only* when its not a UTF/high char */ | |
07be1b83 YO |
7155 | const char * cur_parse= RExC_parse; |
7156 | RExC_emit = (regnode *)orig_emit; | |
7157 | RExC_parse = (char *)orig_parse; | |
7f6f358c YO |
7158 | ret = reg_node(pRExC_state, |
7159 | (U8)((ANYOF_FLAGS(ret) & ANYOF_FOLD) ? EXACTF : EXACT)); | |
07be1b83 | 7160 | RExC_parse = (char *)cur_parse; |
7f6f358c YO |
7161 | *STRING(ret)= (char)value; |
7162 | STR_LEN(ret)= 1; | |
7163 | RExC_emit += STR_SZ(1); | |
7164 | return ret; | |
7165 | } | |
ae5c130c | 7166 | /* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */ |
7f6f358c | 7167 | if ( /* If the only flag is folding (plus possibly inversion). */ |
516a5887 JH |
7168 | ((ANYOF_FLAGS(ret) & (ANYOF_FLAGS_ALL ^ ANYOF_INVERT)) == ANYOF_FOLD) |
7169 | ) { | |
a0ed51b3 | 7170 | for (value = 0; value < 256; ++value) { |
936ed897 | 7171 | if (ANYOF_BITMAP_TEST(ret, value)) { |
eb160463 | 7172 | UV fold = PL_fold[value]; |
ffc61ed2 JH |
7173 | |
7174 | if (fold != value) | |
7175 | ANYOF_BITMAP_SET(ret, fold); | |
ae5c130c GS |
7176 | } |
7177 | } | |
936ed897 | 7178 | ANYOF_FLAGS(ret) &= ~ANYOF_FOLD; |
ae5c130c | 7179 | } |
ffc61ed2 | 7180 | |
ae5c130c | 7181 | /* optimize inverted simple patterns (e.g. [^a-z]) */ |
7f6f358c | 7182 | if (optimize_invert && |
ffc61ed2 JH |
7183 | /* If the only flag is inversion. */ |
7184 | (ANYOF_FLAGS(ret) & ANYOF_FLAGS_ALL) == ANYOF_INVERT) { | |
b8c5462f | 7185 | for (value = 0; value < ANYOF_BITMAP_SIZE; ++value) |
936ed897 | 7186 | ANYOF_BITMAP(ret)[value] ^= ANYOF_FLAGS_ALL; |
1aa99e6b | 7187 | ANYOF_FLAGS(ret) = ANYOF_UNICODE_ALL; |
ae5c130c | 7188 | } |
7f6f358c | 7189 | { |
097eb12c | 7190 | AV * const av = newAV(); |
ffc61ed2 | 7191 | SV *rv; |
9e55ce06 | 7192 | /* The 0th element stores the character class description |
6a0407ee | 7193 | * in its textual form: used later (regexec.c:Perl_regclass_swash()) |
9e55ce06 JH |
7194 | * to initialize the appropriate swash (which gets stored in |
7195 | * the 1st element), and also useful for dumping the regnode. | |
7196 | * The 2nd element stores the multicharacter foldings, | |
6a0407ee | 7197 | * used later (regexec.c:S_reginclass()). */ |
ffc61ed2 JH |
7198 | av_store(av, 0, listsv); |
7199 | av_store(av, 1, NULL); | |
9e55ce06 | 7200 | av_store(av, 2, (SV*)unicode_alternate); |
ffc61ed2 | 7201 | rv = newRV_noinc((SV*)av); |
19860706 | 7202 | n = add_data(pRExC_state, 1, "s"); |
830247a4 | 7203 | RExC_rx->data->data[n] = (void*)rv; |
ffc61ed2 | 7204 | ARG_SET(ret, n); |
a0ed51b3 | 7205 | } |
a0ed51b3 LW |
7206 | return ret; |
7207 | } | |
7208 | ||
76e3520e | 7209 | STATIC char* |
830247a4 | 7210 | S_nextchar(pTHX_ RExC_state_t *pRExC_state) |
a0d0e21e | 7211 | { |
097eb12c | 7212 | char* const retval = RExC_parse++; |
a0d0e21e | 7213 | |
4633a7c4 | 7214 | for (;;) { |
830247a4 IZ |
7215 | if (*RExC_parse == '(' && RExC_parse[1] == '?' && |
7216 | RExC_parse[2] == '#') { | |
e994fd66 AE |
7217 | while (*RExC_parse != ')') { |
7218 | if (RExC_parse == RExC_end) | |
7219 | FAIL("Sequence (?#... not terminated"); | |
830247a4 | 7220 | RExC_parse++; |
e994fd66 | 7221 | } |
830247a4 | 7222 | RExC_parse++; |
4633a7c4 LW |
7223 | continue; |
7224 | } | |
e2509266 | 7225 | if (RExC_flags & PMf_EXTENDED) { |
830247a4 IZ |
7226 | if (isSPACE(*RExC_parse)) { |
7227 | RExC_parse++; | |
748a9306 LW |
7228 | continue; |
7229 | } | |
830247a4 | 7230 | else if (*RExC_parse == '#') { |
e994fd66 AE |
7231 | while (RExC_parse < RExC_end) |
7232 | if (*RExC_parse++ == '\n') break; | |
748a9306 LW |
7233 | continue; |
7234 | } | |
748a9306 | 7235 | } |
4633a7c4 | 7236 | return retval; |
a0d0e21e | 7237 | } |
a687059c LW |
7238 | } |
7239 | ||
7240 | /* | |
c277df42 | 7241 | - reg_node - emit a node |
a0d0e21e | 7242 | */ |
76e3520e | 7243 | STATIC regnode * /* Location. */ |
830247a4 | 7244 | S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op) |
a687059c | 7245 | { |
97aff369 | 7246 | dVAR; |
c277df42 | 7247 | register regnode *ptr; |
504618e9 | 7248 | regnode * const ret = RExC_emit; |
07be1b83 | 7249 | GET_RE_DEBUG_FLAGS_DECL; |
a687059c | 7250 | |
c277df42 | 7251 | if (SIZE_ONLY) { |
830247a4 IZ |
7252 | SIZE_ALIGN(RExC_size); |
7253 | RExC_size += 1; | |
a0d0e21e LW |
7254 | return(ret); |
7255 | } | |
c277df42 | 7256 | NODE_ALIGN_FILL(ret); |
a0d0e21e | 7257 | ptr = ret; |
c277df42 | 7258 | FILL_ADVANCE_NODE(ptr, op); |
fac92740 | 7259 | if (RExC_offsets) { /* MJD */ |
07be1b83 | 7260 | MJD_OFFSET_DEBUG(("%s:%d: (op %s) %s %"UVuf" (len %"UVuf") (max %"UVuf").\n", |
fac92740 MJD |
7261 | "reg_node", __LINE__, |
7262 | reg_name[op], | |
07be1b83 YO |
7263 | (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] |
7264 | ? "Overwriting end of array!\n" : "OK", | |
7265 | (UV)(RExC_emit - RExC_emit_start), | |
7266 | (UV)(RExC_parse - RExC_start), | |
7267 | (UV)RExC_offsets[0])); | |
ccb2c380 | 7268 | Set_Node_Offset(RExC_emit, RExC_parse + (op == END)); |
fac92740 | 7269 | } |
07be1b83 | 7270 | |
830247a4 | 7271 | RExC_emit = ptr; |
a687059c | 7272 | |
a0d0e21e | 7273 | return(ret); |
a687059c LW |
7274 | } |
7275 | ||
7276 | /* | |
a0d0e21e LW |
7277 | - reganode - emit a node with an argument |
7278 | */ | |
76e3520e | 7279 | STATIC regnode * /* Location. */ |
830247a4 | 7280 | S_reganode(pTHX_ RExC_state_t *pRExC_state, U8 op, U32 arg) |
fe14fcc3 | 7281 | { |
97aff369 | 7282 | dVAR; |
c277df42 | 7283 | register regnode *ptr; |
504618e9 | 7284 | regnode * const ret = RExC_emit; |
07be1b83 | 7285 | GET_RE_DEBUG_FLAGS_DECL; |
fe14fcc3 | 7286 | |
c277df42 | 7287 | if (SIZE_ONLY) { |
830247a4 IZ |
7288 | SIZE_ALIGN(RExC_size); |
7289 | RExC_size += 2; | |
6bda09f9 YO |
7290 | /* |
7291 | We can't do this: | |
7292 | ||
7293 | assert(2==regarglen[op]+1); | |
7294 | ||
7295 | Anything larger than this has to allocate the extra amount. | |
7296 | If we changed this to be: | |
7297 | ||
7298 | RExC_size += (1 + regarglen[op]); | |
7299 | ||
7300 | then it wouldn't matter. Its not clear what side effect | |
7301 | might come from that so its not done so far. | |
7302 | -- dmq | |
7303 | */ | |
a0d0e21e LW |
7304 | return(ret); |
7305 | } | |
fe14fcc3 | 7306 | |
c277df42 | 7307 | NODE_ALIGN_FILL(ret); |
a0d0e21e | 7308 | ptr = ret; |
c277df42 | 7309 | FILL_ADVANCE_NODE_ARG(ptr, op, arg); |
fac92740 | 7310 | if (RExC_offsets) { /* MJD */ |
07be1b83 | 7311 | MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n", |
fac92740 | 7312 | "reganode", |
ccb2c380 MP |
7313 | __LINE__, |
7314 | reg_name[op], | |
07be1b83 | 7315 | (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] ? |
fac92740 | 7316 | "Overwriting end of array!\n" : "OK", |
07be1b83 YO |
7317 | (UV)(RExC_emit - RExC_emit_start), |
7318 | (UV)(RExC_parse - RExC_start), | |
7319 | (UV)RExC_offsets[0])); | |
ccb2c380 | 7320 | Set_Cur_Node_Offset; |
fac92740 MJD |
7321 | } |
7322 | ||
830247a4 | 7323 | RExC_emit = ptr; |
fe14fcc3 | 7324 | |
a0d0e21e | 7325 | return(ret); |
fe14fcc3 LW |
7326 | } |
7327 | ||
7328 | /* | |
cd439c50 | 7329 | - reguni - emit (if appropriate) a Unicode character |
a0ed51b3 | 7330 | */ |
71207a34 AL |
7331 | STATIC STRLEN |
7332 | S_reguni(pTHX_ const RExC_state_t *pRExC_state, UV uv, char* s) | |
a0ed51b3 | 7333 | { |
97aff369 | 7334 | dVAR; |
71207a34 | 7335 | return SIZE_ONLY ? UNISKIP(uv) : (uvchr_to_utf8((U8*)s, uv) - (U8*)s); |
a0ed51b3 LW |
7336 | } |
7337 | ||
7338 | /* | |
a0d0e21e LW |
7339 | - reginsert - insert an operator in front of already-emitted operand |
7340 | * | |
7341 | * Means relocating the operand. | |
7342 | */ | |
76e3520e | 7343 | STATIC void |
6bda09f9 | 7344 | S_reginsert(pTHX_ RExC_state_t *pRExC_state, U8 op, regnode *opnd, U32 depth) |
a687059c | 7345 | { |
97aff369 | 7346 | dVAR; |
c277df42 IZ |
7347 | register regnode *src; |
7348 | register regnode *dst; | |
7349 | register regnode *place; | |
504618e9 | 7350 | const int offset = regarglen[(U8)op]; |
6bda09f9 | 7351 | const int size = NODE_STEP_REGNODE + offset; |
07be1b83 | 7352 | GET_RE_DEBUG_FLAGS_DECL; |
22c35a8c | 7353 | /* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */ |
6bda09f9 | 7354 | DEBUG_PARSE_FMT("inst"," - %s",reg_name[op]); |
c277df42 | 7355 | if (SIZE_ONLY) { |
6bda09f9 | 7356 | RExC_size += size; |
a0d0e21e LW |
7357 | return; |
7358 | } | |
a687059c | 7359 | |
830247a4 | 7360 | src = RExC_emit; |
6bda09f9 | 7361 | RExC_emit += size; |
830247a4 | 7362 | dst = RExC_emit; |
6bda09f9 YO |
7363 | if (RExC_parens) { |
7364 | int paren; | |
7365 | for ( paren=0 ; paren < RExC_npar ; paren++ ) { | |
7366 | if ( RExC_parens[paren] >= src ) | |
7367 | RExC_parens[paren] += size; | |
7368 | } | |
7369 | } | |
7370 | ||
fac92740 | 7371 | while (src > opnd) { |
c277df42 | 7372 | StructCopy(--src, --dst, regnode); |
fac92740 | 7373 | if (RExC_offsets) { /* MJD 20010112 */ |
07be1b83 | 7374 | MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s copy %"UVuf" -> %"UVuf" (max %"UVuf").\n", |
fac92740 | 7375 | "reg_insert", |
ccb2c380 MP |
7376 | __LINE__, |
7377 | reg_name[op], | |
07be1b83 YO |
7378 | (UV)(dst - RExC_emit_start) > RExC_offsets[0] |
7379 | ? "Overwriting end of array!\n" : "OK", | |
7380 | (UV)(src - RExC_emit_start), | |
7381 | (UV)(dst - RExC_emit_start), | |
7382 | (UV)RExC_offsets[0])); | |
ccb2c380 MP |
7383 | Set_Node_Offset_To_R(dst-RExC_emit_start, Node_Offset(src)); |
7384 | Set_Node_Length_To_R(dst-RExC_emit_start, Node_Length(src)); | |
fac92740 MJD |
7385 | } |
7386 | } | |
7387 | ||
a0d0e21e LW |
7388 | |
7389 | place = opnd; /* Op node, where operand used to be. */ | |
fac92740 | 7390 | if (RExC_offsets) { /* MJD */ |
07be1b83 | 7391 | MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n", |
fac92740 | 7392 | "reginsert", |
ccb2c380 MP |
7393 | __LINE__, |
7394 | reg_name[op], | |
07be1b83 | 7395 | (UV)(place - RExC_emit_start) > RExC_offsets[0] |
fac92740 | 7396 | ? "Overwriting end of array!\n" : "OK", |
07be1b83 YO |
7397 | (UV)(place - RExC_emit_start), |
7398 | (UV)(RExC_parse - RExC_start), | |
786e8c11 | 7399 | (UV)RExC_offsets[0])); |
ccb2c380 | 7400 | Set_Node_Offset(place, RExC_parse); |
45948336 | 7401 | Set_Node_Length(place, 1); |
fac92740 | 7402 | } |
c277df42 IZ |
7403 | src = NEXTOPER(place); |
7404 | FILL_ADVANCE_NODE(place, op); | |
7405 | Zero(src, offset, regnode); | |
a687059c LW |
7406 | } |
7407 | ||
7408 | /* | |
c277df42 | 7409 | - regtail - set the next-pointer at the end of a node chain of p to val. |
3dab1dad | 7410 | - SEE ALSO: regtail_study |
a0d0e21e | 7411 | */ |
097eb12c | 7412 | /* TODO: All three parms should be const */ |
76e3520e | 7413 | STATIC void |
3dab1dad | 7414 | S_regtail(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth) |
a687059c | 7415 | { |
97aff369 | 7416 | dVAR; |
c277df42 | 7417 | register regnode *scan; |
72f13be8 | 7418 | GET_RE_DEBUG_FLAGS_DECL; |
f9049ba1 SP |
7419 | #ifndef DEBUGGING |
7420 | PERL_UNUSED_ARG(depth); | |
7421 | #endif | |
a0d0e21e | 7422 | |
c277df42 | 7423 | if (SIZE_ONLY) |
a0d0e21e LW |
7424 | return; |
7425 | ||
7426 | /* Find last node. */ | |
7427 | scan = p; | |
7428 | for (;;) { | |
504618e9 | 7429 | regnode * const temp = regnext(scan); |
3dab1dad YO |
7430 | DEBUG_PARSE_r({ |
7431 | SV * const mysv=sv_newmortal(); | |
7432 | DEBUG_PARSE_MSG((scan==p ? "tail" : "")); | |
7433 | regprop(RExC_rx, mysv, scan); | |
eaf3ca90 YO |
7434 | PerlIO_printf(Perl_debug_log, "~ %s (%d) %s %s\n", |
7435 | SvPV_nolen_const(mysv), REG_NODE_NUM(scan), | |
7436 | (temp == NULL ? "->" : ""), | |
7437 | (temp == NULL ? reg_name[OP(val)] : "") | |
7438 | ); | |
3dab1dad YO |
7439 | }); |
7440 | if (temp == NULL) | |
7441 | break; | |
7442 | scan = temp; | |
7443 | } | |
7444 | ||
7445 | if (reg_off_by_arg[OP(scan)]) { | |
7446 | ARG_SET(scan, val - scan); | |
7447 | } | |
7448 | else { | |
7449 | NEXT_OFF(scan) = val - scan; | |
7450 | } | |
7451 | } | |
7452 | ||
07be1b83 | 7453 | #ifdef DEBUGGING |
3dab1dad YO |
7454 | /* |
7455 | - regtail_study - set the next-pointer at the end of a node chain of p to val. | |
7456 | - Look for optimizable sequences at the same time. | |
7457 | - currently only looks for EXACT chains. | |
07be1b83 YO |
7458 | |
7459 | This is expermental code. The idea is to use this routine to perform | |
7460 | in place optimizations on branches and groups as they are constructed, | |
7461 | with the long term intention of removing optimization from study_chunk so | |
7462 | that it is purely analytical. | |
7463 | ||
7464 | Currently only used when in DEBUG mode. The macro REGTAIL_STUDY() is used | |
7465 | to control which is which. | |
7466 | ||
3dab1dad YO |
7467 | */ |
7468 | /* TODO: All four parms should be const */ | |
07be1b83 | 7469 | |
3dab1dad YO |
7470 | STATIC U8 |
7471 | S_regtail_study(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth) | |
7472 | { | |
7473 | dVAR; | |
7474 | register regnode *scan; | |
07be1b83 YO |
7475 | U8 exact = PSEUDO; |
7476 | #ifdef EXPERIMENTAL_INPLACESCAN | |
7477 | I32 min = 0; | |
7478 | #endif | |
7479 | ||
3dab1dad YO |
7480 | GET_RE_DEBUG_FLAGS_DECL; |
7481 | ||
07be1b83 | 7482 | |
3dab1dad YO |
7483 | if (SIZE_ONLY) |
7484 | return exact; | |
7485 | ||
7486 | /* Find last node. */ | |
7487 | ||
7488 | scan = p; | |
7489 | for (;;) { | |
7490 | regnode * const temp = regnext(scan); | |
07be1b83 YO |
7491 | #ifdef EXPERIMENTAL_INPLACESCAN |
7492 | if (PL_regkind[OP(scan)] == EXACT) | |
7493 | if (join_exact(pRExC_state,scan,&min,1,val,depth+1)) | |
7494 | return EXACT; | |
7495 | #endif | |
3dab1dad YO |
7496 | if ( exact ) { |
7497 | switch (OP(scan)) { | |
7498 | case EXACT: | |
7499 | case EXACTF: | |
7500 | case EXACTFL: | |
7501 | if( exact == PSEUDO ) | |
7502 | exact= OP(scan); | |
07be1b83 YO |
7503 | else if ( exact != OP(scan) ) |
7504 | exact= 0; | |
3dab1dad YO |
7505 | case NOTHING: |
7506 | break; | |
7507 | default: | |
7508 | exact= 0; | |
7509 | } | |
7510 | } | |
7511 | DEBUG_PARSE_r({ | |
7512 | SV * const mysv=sv_newmortal(); | |
7513 | DEBUG_PARSE_MSG((scan==p ? "tsdy" : "")); | |
7514 | regprop(RExC_rx, mysv, scan); | |
eaf3ca90 | 7515 | PerlIO_printf(Perl_debug_log, "~ %s (%d) -> %s\n", |
3dab1dad | 7516 | SvPV_nolen_const(mysv), |
eaf3ca90 YO |
7517 | REG_NODE_NUM(scan), |
7518 | reg_name[exact]); | |
3dab1dad | 7519 | }); |
a0d0e21e LW |
7520 | if (temp == NULL) |
7521 | break; | |
7522 | scan = temp; | |
7523 | } | |
07be1b83 YO |
7524 | DEBUG_PARSE_r({ |
7525 | SV * const mysv_val=sv_newmortal(); | |
7526 | DEBUG_PARSE_MSG(""); | |
7527 | regprop(RExC_rx, mysv_val, val); | |
7528 | PerlIO_printf(Perl_debug_log, "~ attach to %s (%d) offset to %d\n", | |
7529 | SvPV_nolen_const(mysv_val), | |
7530 | REG_NODE_NUM(val), | |
7531 | val - scan | |
7532 | ); | |
7533 | }); | |
c277df42 IZ |
7534 | if (reg_off_by_arg[OP(scan)]) { |
7535 | ARG_SET(scan, val - scan); | |
a0ed51b3 LW |
7536 | } |
7537 | else { | |
c277df42 IZ |
7538 | NEXT_OFF(scan) = val - scan; |
7539 | } | |
3dab1dad YO |
7540 | |
7541 | return exact; | |
a687059c | 7542 | } |
07be1b83 | 7543 | #endif |
a687059c LW |
7544 | |
7545 | /* | |
a687059c LW |
7546 | - regcurly - a little FSA that accepts {\d+,?\d*} |
7547 | */ | |
79072805 | 7548 | STATIC I32 |
5f66b61c | 7549 | S_regcurly(register const char *s) |
a687059c LW |
7550 | { |
7551 | if (*s++ != '{') | |
7552 | return FALSE; | |
f0fcb552 | 7553 | if (!isDIGIT(*s)) |
a687059c | 7554 | return FALSE; |
f0fcb552 | 7555 | while (isDIGIT(*s)) |
a687059c LW |
7556 | s++; |
7557 | if (*s == ',') | |
7558 | s++; | |
f0fcb552 | 7559 | while (isDIGIT(*s)) |
a687059c LW |
7560 | s++; |
7561 | if (*s != '}') | |
7562 | return FALSE; | |
7563 | return TRUE; | |
7564 | } | |
7565 | ||
a687059c LW |
7566 | |
7567 | /* | |
fd181c75 | 7568 | - regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form |
a687059c LW |
7569 | */ |
7570 | void | |
097eb12c | 7571 | Perl_regdump(pTHX_ const regexp *r) |
a687059c | 7572 | { |
35ff7856 | 7573 | #ifdef DEBUGGING |
97aff369 | 7574 | dVAR; |
c445ea15 | 7575 | SV * const sv = sv_newmortal(); |
ab3bbdeb | 7576 | SV *dsv= sv_newmortal(); |
a687059c | 7577 | |
786e8c11 | 7578 | (void)dumpuntil(r, r->program, r->program + 1, NULL, NULL, sv, 0, 0); |
a0d0e21e LW |
7579 | |
7580 | /* Header fields of interest. */ | |
ab3bbdeb YO |
7581 | if (r->anchored_substr) { |
7582 | RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->anchored_substr), | |
7583 | RE_SV_DUMPLEN(r->anchored_substr), 30); | |
7b0972df | 7584 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb YO |
7585 | "anchored %s%s at %"IVdf" ", |
7586 | s, RE_SV_TAIL(r->anchored_substr), | |
7b0972df | 7587 | (IV)r->anchored_offset); |
ab3bbdeb YO |
7588 | } else if (r->anchored_utf8) { |
7589 | RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->anchored_utf8), | |
7590 | RE_SV_DUMPLEN(r->anchored_utf8), 30); | |
33b8afdf | 7591 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb YO |
7592 | "anchored utf8 %s%s at %"IVdf" ", |
7593 | s, RE_SV_TAIL(r->anchored_utf8), | |
33b8afdf | 7594 | (IV)r->anchored_offset); |
ab3bbdeb YO |
7595 | } |
7596 | if (r->float_substr) { | |
7597 | RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->float_substr), | |
7598 | RE_SV_DUMPLEN(r->float_substr), 30); | |
7b0972df | 7599 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb YO |
7600 | "floating %s%s at %"IVdf"..%"UVuf" ", |
7601 | s, RE_SV_TAIL(r->float_substr), | |
7b0972df | 7602 | (IV)r->float_min_offset, (UV)r->float_max_offset); |
ab3bbdeb YO |
7603 | } else if (r->float_utf8) { |
7604 | RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->float_utf8), | |
7605 | RE_SV_DUMPLEN(r->float_utf8), 30); | |
33b8afdf | 7606 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb YO |
7607 | "floating utf8 %s%s at %"IVdf"..%"UVuf" ", |
7608 | s, RE_SV_TAIL(r->float_utf8), | |
33b8afdf | 7609 | (IV)r->float_min_offset, (UV)r->float_max_offset); |
ab3bbdeb | 7610 | } |
33b8afdf | 7611 | if (r->check_substr || r->check_utf8) |
b81d288d | 7612 | PerlIO_printf(Perl_debug_log, |
10edeb5d JH |
7613 | (const char *) |
7614 | (r->check_substr == r->float_substr | |
7615 | && r->check_utf8 == r->float_utf8 | |
7616 | ? "(checking floating" : "(checking anchored")); | |
c277df42 IZ |
7617 | if (r->reganch & ROPT_NOSCAN) |
7618 | PerlIO_printf(Perl_debug_log, " noscan"); | |
7619 | if (r->reganch & ROPT_CHECK_ALL) | |
7620 | PerlIO_printf(Perl_debug_log, " isall"); | |
33b8afdf | 7621 | if (r->check_substr || r->check_utf8) |
c277df42 IZ |
7622 | PerlIO_printf(Perl_debug_log, ") "); |
7623 | ||
46fc3d4c | 7624 | if (r->regstclass) { |
32fc9b6a | 7625 | regprop(r, sv, r->regstclass); |
1de06328 | 7626 | PerlIO_printf(Perl_debug_log, "stclass %s ", SvPVX_const(sv)); |
46fc3d4c | 7627 | } |
774d564b | 7628 | if (r->reganch & ROPT_ANCH) { |
7629 | PerlIO_printf(Perl_debug_log, "anchored"); | |
7630 | if (r->reganch & ROPT_ANCH_BOL) | |
7631 | PerlIO_printf(Perl_debug_log, "(BOL)"); | |
c277df42 IZ |
7632 | if (r->reganch & ROPT_ANCH_MBOL) |
7633 | PerlIO_printf(Perl_debug_log, "(MBOL)"); | |
cad2e5aa JH |
7634 | if (r->reganch & ROPT_ANCH_SBOL) |
7635 | PerlIO_printf(Perl_debug_log, "(SBOL)"); | |
774d564b | 7636 | if (r->reganch & ROPT_ANCH_GPOS) |
7637 | PerlIO_printf(Perl_debug_log, "(GPOS)"); | |
7638 | PerlIO_putc(Perl_debug_log, ' '); | |
7639 | } | |
c277df42 IZ |
7640 | if (r->reganch & ROPT_GPOS_SEEN) |
7641 | PerlIO_printf(Perl_debug_log, "GPOS "); | |
a0d0e21e | 7642 | if (r->reganch & ROPT_SKIP) |
760ac839 | 7643 | PerlIO_printf(Perl_debug_log, "plus "); |
a0d0e21e | 7644 | if (r->reganch & ROPT_IMPLICIT) |
760ac839 | 7645 | PerlIO_printf(Perl_debug_log, "implicit "); |
760ac839 | 7646 | PerlIO_printf(Perl_debug_log, "minlen %ld ", (long) r->minlen); |
ce862d02 IZ |
7647 | if (r->reganch & ROPT_EVAL_SEEN) |
7648 | PerlIO_printf(Perl_debug_log, "with eval "); | |
760ac839 | 7649 | PerlIO_printf(Perl_debug_log, "\n"); |
65e66c80 | 7650 | #else |
96a5add6 | 7651 | PERL_UNUSED_CONTEXT; |
65e66c80 | 7652 | PERL_UNUSED_ARG(r); |
17c3b450 | 7653 | #endif /* DEBUGGING */ |
a687059c LW |
7654 | } |
7655 | ||
7656 | /* | |
a0d0e21e LW |
7657 | - regprop - printable representation of opcode |
7658 | */ | |
46fc3d4c | 7659 | void |
32fc9b6a | 7660 | Perl_regprop(pTHX_ const regexp *prog, SV *sv, const regnode *o) |
a687059c | 7661 | { |
35ff7856 | 7662 | #ifdef DEBUGGING |
97aff369 | 7663 | dVAR; |
9b155405 | 7664 | register int k; |
1de06328 | 7665 | GET_RE_DEBUG_FLAGS_DECL; |
a0d0e21e | 7666 | |
54dc92de | 7667 | sv_setpvn(sv, "", 0); |
03363afd | 7668 | if (OP(o) > REGNODE_MAX) /* regnode.type is unsigned */ |
830247a4 IZ |
7669 | /* It would be nice to FAIL() here, but this may be called from |
7670 | regexec.c, and it would be hard to supply pRExC_state. */ | |
a5ca303d | 7671 | Perl_croak(aTHX_ "Corrupted regexp opcode %d > %d", (int)OP(o), (int)REGNODE_MAX); |
bfed75c6 | 7672 | sv_catpv(sv, reg_name[OP(o)]); /* Take off const! */ |
9b155405 | 7673 | |
3dab1dad | 7674 | k = PL_regkind[OP(o)]; |
9b155405 | 7675 | |
2a782b5b | 7676 | if (k == EXACT) { |
396482e1 | 7677 | SV * const dsv = sv_2mortal(newSVpvs("")); |
ab3bbdeb YO |
7678 | /* Using is_utf8_string() (via PERL_PV_UNI_DETECT) |
7679 | * is a crude hack but it may be the best for now since | |
7680 | * we have no flag "this EXACTish node was UTF-8" | |
7681 | * --jhi */ | |
7682 | const char * const s = | |
ddc5bc0f | 7683 | pv_pretty(dsv, STRING(o), STR_LEN(o), 60, |
ab3bbdeb YO |
7684 | PL_colors[0], PL_colors[1], |
7685 | PERL_PV_ESCAPE_UNI_DETECT | | |
7686 | PERL_PV_PRETTY_ELIPSES | | |
7687 | PERL_PV_PRETTY_LTGT | |
7688 | ); | |
7689 | Perl_sv_catpvf(aTHX_ sv, " %s", s ); | |
bb263b4e | 7690 | } else if (k == TRIE) { |
3dab1dad | 7691 | /* print the details of the trie in dumpuntil instead, as |
4f639d21 | 7692 | * prog->data isn't available here */ |
1de06328 YO |
7693 | const char op = OP(o); |
7694 | const I32 n = ARG(o); | |
7695 | const reg_ac_data * const ac = IS_TRIE_AC(op) ? | |
7696 | (reg_ac_data *)prog->data->data[n] : | |
7697 | NULL; | |
7698 | const reg_trie_data * const trie = !IS_TRIE_AC(op) ? | |
7699 | (reg_trie_data*)prog->data->data[n] : | |
7700 | ac->trie; | |
7701 | ||
7702 | Perl_sv_catpvf(aTHX_ sv, "-%s",reg_name[o->flags]); | |
7703 | DEBUG_TRIE_COMPILE_r( | |
7704 | Perl_sv_catpvf(aTHX_ sv, | |
7705 | "<S:%"UVuf"/%"IVdf" W:%"UVuf" L:%"UVuf"/%"UVuf" C:%"UVuf"/%"UVuf">", | |
7706 | (UV)trie->startstate, | |
7707 | (IV)trie->laststate-1, | |
7708 | (UV)trie->wordcount, | |
7709 | (UV)trie->minlen, | |
7710 | (UV)trie->maxlen, | |
7711 | (UV)TRIE_CHARCOUNT(trie), | |
7712 | (UV)trie->uniquecharcount | |
7713 | ) | |
7714 | ); | |
7715 | if ( IS_ANYOF_TRIE(op) || trie->bitmap ) { | |
7716 | int i; | |
7717 | int rangestart = -1; | |
f46cb337 | 7718 | U8* bitmap = IS_ANYOF_TRIE(op) ? (U8*)ANYOF_BITMAP(o) : (U8*)TRIE_BITMAP(trie); |
1de06328 YO |
7719 | Perl_sv_catpvf(aTHX_ sv, "["); |
7720 | for (i = 0; i <= 256; i++) { | |
7721 | if (i < 256 && BITMAP_TEST(bitmap,i)) { | |
7722 | if (rangestart == -1) | |
7723 | rangestart = i; | |
7724 | } else if (rangestart != -1) { | |
7725 | if (i <= rangestart + 3) | |
7726 | for (; rangestart < i; rangestart++) | |
7727 | put_byte(sv, rangestart); | |
7728 | else { | |
7729 | put_byte(sv, rangestart); | |
7730 | sv_catpvs(sv, "-"); | |
7731 | put_byte(sv, i - 1); | |
7732 | } | |
7733 | rangestart = -1; | |
7734 | } | |
7735 | } | |
7736 | Perl_sv_catpvf(aTHX_ sv, "]"); | |
7737 | } | |
7738 | ||
a3621e74 | 7739 | } else if (k == CURLY) { |
cb434fcc | 7740 | if (OP(o) == CURLYM || OP(o) == CURLYN || OP(o) == CURLYX) |
cea2e8a9 GS |
7741 | Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */ |
7742 | Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o)); | |
a0d0e21e | 7743 | } |
2c2d71f5 JH |
7744 | else if (k == WHILEM && o->flags) /* Ordinal/of */ |
7745 | Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4); | |
6bda09f9 | 7746 | else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP) |
894356b3 | 7747 | Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */ |
6bda09f9 YO |
7748 | else if (k == RECURSE) |
7749 | Perl_sv_catpvf(aTHX_ sv, "%d[%+d]", (int)ARG(o),(int)ARG2L(o)); /* Paren and offset */ | |
9b155405 | 7750 | else if (k == LOGICAL) |
04ebc1ab | 7751 | Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */ |
653099ff GS |
7752 | else if (k == ANYOF) { |
7753 | int i, rangestart = -1; | |
2d03de9c | 7754 | const U8 flags = ANYOF_FLAGS(o); |
0bd48802 AL |
7755 | |
7756 | /* Should be synchronized with * ANYOF_ #xdefines in regcomp.h */ | |
7757 | static const char * const anyofs[] = { | |
653099ff GS |
7758 | "\\w", |
7759 | "\\W", | |
7760 | "\\s", | |
7761 | "\\S", | |
7762 | "\\d", | |
7763 | "\\D", | |
7764 | "[:alnum:]", | |
7765 | "[:^alnum:]", | |
7766 | "[:alpha:]", | |
7767 | "[:^alpha:]", | |
7768 | "[:ascii:]", | |
7769 | "[:^ascii:]", | |
7770 | "[:ctrl:]", | |
7771 | "[:^ctrl:]", | |
7772 | "[:graph:]", | |
7773 | "[:^graph:]", | |
7774 | "[:lower:]", | |
7775 | "[:^lower:]", | |
7776 | "[:print:]", | |
7777 | "[:^print:]", | |
7778 | "[:punct:]", | |
7779 | "[:^punct:]", | |
7780 | "[:upper:]", | |
aaa51d5e | 7781 | "[:^upper:]", |
653099ff | 7782 | "[:xdigit:]", |
aaa51d5e JF |
7783 | "[:^xdigit:]", |
7784 | "[:space:]", | |
7785 | "[:^space:]", | |
7786 | "[:blank:]", | |
7787 | "[:^blank:]" | |
653099ff GS |
7788 | }; |
7789 | ||
19860706 | 7790 | if (flags & ANYOF_LOCALE) |
396482e1 | 7791 | sv_catpvs(sv, "{loc}"); |
19860706 | 7792 | if (flags & ANYOF_FOLD) |
396482e1 | 7793 | sv_catpvs(sv, "{i}"); |
653099ff | 7794 | Perl_sv_catpvf(aTHX_ sv, "[%s", PL_colors[0]); |
19860706 | 7795 | if (flags & ANYOF_INVERT) |
396482e1 | 7796 | sv_catpvs(sv, "^"); |
ffc61ed2 JH |
7797 | for (i = 0; i <= 256; i++) { |
7798 | if (i < 256 && ANYOF_BITMAP_TEST(o,i)) { | |
7799 | if (rangestart == -1) | |
7800 | rangestart = i; | |
7801 | } else if (rangestart != -1) { | |
7802 | if (i <= rangestart + 3) | |
7803 | for (; rangestart < i; rangestart++) | |
653099ff | 7804 | put_byte(sv, rangestart); |
ffc61ed2 JH |
7805 | else { |
7806 | put_byte(sv, rangestart); | |
396482e1 | 7807 | sv_catpvs(sv, "-"); |
ffc61ed2 | 7808 | put_byte(sv, i - 1); |
653099ff | 7809 | } |
ffc61ed2 | 7810 | rangestart = -1; |
653099ff | 7811 | } |
847a199f | 7812 | } |
ffc61ed2 JH |
7813 | |
7814 | if (o->flags & ANYOF_CLASS) | |
bb7a0f54 | 7815 | for (i = 0; i < (int)(sizeof(anyofs)/sizeof(char*)); i++) |
ffc61ed2 JH |
7816 | if (ANYOF_CLASS_TEST(o,i)) |
7817 | sv_catpv(sv, anyofs[i]); | |
7818 | ||
7819 | if (flags & ANYOF_UNICODE) | |
396482e1 | 7820 | sv_catpvs(sv, "{unicode}"); |
1aa99e6b | 7821 | else if (flags & ANYOF_UNICODE_ALL) |
396482e1 | 7822 | sv_catpvs(sv, "{unicode_all}"); |
ffc61ed2 JH |
7823 | |
7824 | { | |
7825 | SV *lv; | |
32fc9b6a | 7826 | SV * const sw = regclass_swash(prog, o, FALSE, &lv, 0); |
b81d288d | 7827 | |
ffc61ed2 JH |
7828 | if (lv) { |
7829 | if (sw) { | |
89ebb4a3 | 7830 | U8 s[UTF8_MAXBYTES_CASE+1]; |
b81d288d | 7831 | |
ffc61ed2 | 7832 | for (i = 0; i <= 256; i++) { /* just the first 256 */ |
1df70142 | 7833 | uvchr_to_utf8(s, i); |
ffc61ed2 | 7834 | |
3568d838 | 7835 | if (i < 256 && swash_fetch(sw, s, TRUE)) { |
ffc61ed2 JH |
7836 | if (rangestart == -1) |
7837 | rangestart = i; | |
7838 | } else if (rangestart != -1) { | |
ffc61ed2 JH |
7839 | if (i <= rangestart + 3) |
7840 | for (; rangestart < i; rangestart++) { | |
2d03de9c AL |
7841 | const U8 * const e = uvchr_to_utf8(s,rangestart); |
7842 | U8 *p; | |
7843 | for(p = s; p < e; p++) | |
ffc61ed2 JH |
7844 | put_byte(sv, *p); |
7845 | } | |
7846 | else { | |
2d03de9c AL |
7847 | const U8 *e = uvchr_to_utf8(s,rangestart); |
7848 | U8 *p; | |
7849 | for (p = s; p < e; p++) | |
ffc61ed2 | 7850 | put_byte(sv, *p); |
396482e1 | 7851 | sv_catpvs(sv, "-"); |
2d03de9c AL |
7852 | e = uvchr_to_utf8(s, i-1); |
7853 | for (p = s; p < e; p++) | |
1df70142 | 7854 | put_byte(sv, *p); |
ffc61ed2 JH |
7855 | } |
7856 | rangestart = -1; | |
7857 | } | |
19860706 | 7858 | } |
ffc61ed2 | 7859 | |
396482e1 | 7860 | sv_catpvs(sv, "..."); /* et cetera */ |
19860706 | 7861 | } |
fde631ed | 7862 | |
ffc61ed2 | 7863 | { |
2e0de35c | 7864 | char *s = savesvpv(lv); |
c445ea15 | 7865 | char * const origs = s; |
b81d288d | 7866 | |
3dab1dad YO |
7867 | while (*s && *s != '\n') |
7868 | s++; | |
b81d288d | 7869 | |
ffc61ed2 | 7870 | if (*s == '\n') { |
2d03de9c | 7871 | const char * const t = ++s; |
ffc61ed2 JH |
7872 | |
7873 | while (*s) { | |
7874 | if (*s == '\n') | |
7875 | *s = ' '; | |
7876 | s++; | |
7877 | } | |
7878 | if (s[-1] == ' ') | |
7879 | s[-1] = 0; | |
7880 | ||
7881 | sv_catpv(sv, t); | |
fde631ed | 7882 | } |
b81d288d | 7883 | |
ffc61ed2 | 7884 | Safefree(origs); |
fde631ed JH |
7885 | } |
7886 | } | |
653099ff | 7887 | } |
ffc61ed2 | 7888 | |
653099ff GS |
7889 | Perl_sv_catpvf(aTHX_ sv, "%s]", PL_colors[1]); |
7890 | } | |
9b155405 | 7891 | else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH)) |
07be1b83 | 7892 | Perl_sv_catpvf(aTHX_ sv, "[%d]", -(o->flags)); |
65e66c80 | 7893 | #else |
96a5add6 | 7894 | PERL_UNUSED_CONTEXT; |
65e66c80 SP |
7895 | PERL_UNUSED_ARG(sv); |
7896 | PERL_UNUSED_ARG(o); | |
f9049ba1 | 7897 | PERL_UNUSED_ARG(prog); |
17c3b450 | 7898 | #endif /* DEBUGGING */ |
35ff7856 | 7899 | } |
a687059c | 7900 | |
cad2e5aa JH |
7901 | SV * |
7902 | Perl_re_intuit_string(pTHX_ regexp *prog) | |
7903 | { /* Assume that RE_INTUIT is set */ | |
97aff369 | 7904 | dVAR; |
a3621e74 | 7905 | GET_RE_DEBUG_FLAGS_DECL; |
96a5add6 AL |
7906 | PERL_UNUSED_CONTEXT; |
7907 | ||
a3621e74 | 7908 | DEBUG_COMPILE_r( |
cfd0369c | 7909 | { |
2d03de9c | 7910 | const char * const s = SvPV_nolen_const(prog->check_substr |
cfd0369c | 7911 | ? prog->check_substr : prog->check_utf8); |
cad2e5aa JH |
7912 | |
7913 | if (!PL_colorset) reginitcolors(); | |
7914 | PerlIO_printf(Perl_debug_log, | |
a0288114 | 7915 | "%sUsing REx %ssubstr:%s \"%s%.60s%s%s\"\n", |
33b8afdf JH |
7916 | PL_colors[4], |
7917 | prog->check_substr ? "" : "utf8 ", | |
7918 | PL_colors[5],PL_colors[0], | |
cad2e5aa JH |
7919 | s, |
7920 | PL_colors[1], | |
7921 | (strlen(s) > 60 ? "..." : "")); | |
7922 | } ); | |
7923 | ||
33b8afdf | 7924 | return prog->check_substr ? prog->check_substr : prog->check_utf8; |
cad2e5aa JH |
7925 | } |
7926 | ||
84da74a7 YO |
7927 | /* |
7928 | pregfree - free a regexp | |
7929 | ||
7930 | See regdupe below if you change anything here. | |
7931 | */ | |
7932 | ||
2b69d0c2 | 7933 | void |
864dbfa3 | 7934 | Perl_pregfree(pTHX_ struct regexp *r) |
a687059c | 7935 | { |
27da23d5 | 7936 | dVAR; |
0df25f3d | 7937 | |
fc32ee4a | 7938 | GET_RE_DEBUG_FLAGS_DECL; |
a3621e74 | 7939 | |
7821416a IZ |
7940 | if (!r || (--r->refcnt > 0)) |
7941 | return; | |
ab3bbdeb | 7942 | DEBUG_COMPILE_r({ |
0df25f3d YO |
7943 | if (!PL_colorset) |
7944 | reginitcolors(); | |
ab3bbdeb YO |
7945 | if (RX_DEBUG(r)){ |
7946 | SV *dsv= sv_newmortal(); | |
7947 | RE_PV_QUOTED_DECL(s, (r->reganch & ROPT_UTF8), | |
7948 | dsv, r->precomp, r->prelen, 60); | |
7949 | PerlIO_printf(Perl_debug_log,"%sFreeing REx:%s %s\n", | |
7950 | PL_colors[4],PL_colors[5],s); | |
7951 | } | |
9e55ce06 | 7952 | }); |
cad2e5aa | 7953 | |
43c5f42d NC |
7954 | /* gcov results gave these as non-null 100% of the time, so there's no |
7955 | optimisation in checking them before calling Safefree */ | |
7956 | Safefree(r->precomp); | |
7957 | Safefree(r->offsets); /* 20010421 MJD */ | |
ed252734 | 7958 | RX_MATCH_COPY_FREE(r); |
f8c7b90f | 7959 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
7960 | if (r->saved_copy) |
7961 | SvREFCNT_dec(r->saved_copy); | |
7962 | #endif | |
a193d654 GS |
7963 | if (r->substrs) { |
7964 | if (r->anchored_substr) | |
7965 | SvREFCNT_dec(r->anchored_substr); | |
33b8afdf JH |
7966 | if (r->anchored_utf8) |
7967 | SvREFCNT_dec(r->anchored_utf8); | |
a193d654 GS |
7968 | if (r->float_substr) |
7969 | SvREFCNT_dec(r->float_substr); | |
33b8afdf JH |
7970 | if (r->float_utf8) |
7971 | SvREFCNT_dec(r->float_utf8); | |
2779dcf1 | 7972 | Safefree(r->substrs); |
a193d654 | 7973 | } |
81714fb9 YO |
7974 | if (r->paren_names) |
7975 | SvREFCNT_dec(r->paren_names); | |
c277df42 IZ |
7976 | if (r->data) { |
7977 | int n = r->data->count; | |
f3548bdc DM |
7978 | PAD* new_comppad = NULL; |
7979 | PAD* old_comppad; | |
4026c95a | 7980 | PADOFFSET refcnt; |
dfad63ad | 7981 | |
c277df42 | 7982 | while (--n >= 0) { |
261faec3 | 7983 | /* If you add a ->what type here, update the comment in regcomp.h */ |
c277df42 IZ |
7984 | switch (r->data->what[n]) { |
7985 | case 's': | |
81714fb9 | 7986 | case 'S': |
c277df42 IZ |
7987 | SvREFCNT_dec((SV*)r->data->data[n]); |
7988 | break; | |
653099ff GS |
7989 | case 'f': |
7990 | Safefree(r->data->data[n]); | |
7991 | break; | |
dfad63ad HS |
7992 | case 'p': |
7993 | new_comppad = (AV*)r->data->data[n]; | |
7994 | break; | |
c277df42 | 7995 | case 'o': |
dfad63ad | 7996 | if (new_comppad == NULL) |
cea2e8a9 | 7997 | Perl_croak(aTHX_ "panic: pregfree comppad"); |
f3548bdc DM |
7998 | PAD_SAVE_LOCAL(old_comppad, |
7999 | /* Watch out for global destruction's random ordering. */ | |
c445ea15 | 8000 | (SvTYPE(new_comppad) == SVt_PVAV) ? new_comppad : NULL |
f3548bdc | 8001 | ); |
b34c0dd4 | 8002 | OP_REFCNT_LOCK; |
4026c95a SH |
8003 | refcnt = OpREFCNT_dec((OP_4tree*)r->data->data[n]); |
8004 | OP_REFCNT_UNLOCK; | |
8005 | if (!refcnt) | |
9b978d73 | 8006 | op_free((OP_4tree*)r->data->data[n]); |
9b978d73 | 8007 | |
f3548bdc | 8008 | PAD_RESTORE_LOCAL(old_comppad); |
dfad63ad HS |
8009 | SvREFCNT_dec((SV*)new_comppad); |
8010 | new_comppad = NULL; | |
c277df42 IZ |
8011 | break; |
8012 | case 'n': | |
9e55ce06 | 8013 | break; |
07be1b83 | 8014 | case 'T': |
be8e71aa YO |
8015 | { /* Aho Corasick add-on structure for a trie node. |
8016 | Used in stclass optimization only */ | |
07be1b83 YO |
8017 | U32 refcount; |
8018 | reg_ac_data *aho=(reg_ac_data*)r->data->data[n]; | |
8019 | OP_REFCNT_LOCK; | |
8020 | refcount = --aho->refcount; | |
8021 | OP_REFCNT_UNLOCK; | |
8022 | if ( !refcount ) { | |
8023 | Safefree(aho->states); | |
8024 | Safefree(aho->fail); | |
8025 | aho->trie=NULL; /* not necessary to free this as it is | |
8026 | handled by the 't' case */ | |
8027 | Safefree(r->data->data[n]); /* do this last!!!! */ | |
be8e71aa | 8028 | Safefree(r->regstclass); |
07be1b83 YO |
8029 | } |
8030 | } | |
8031 | break; | |
a3621e74 | 8032 | case 't': |
07be1b83 | 8033 | { |
be8e71aa | 8034 | /* trie structure. */ |
07be1b83 YO |
8035 | U32 refcount; |
8036 | reg_trie_data *trie=(reg_trie_data*)r->data->data[n]; | |
8037 | OP_REFCNT_LOCK; | |
8038 | refcount = --trie->refcount; | |
8039 | OP_REFCNT_UNLOCK; | |
8040 | if ( !refcount ) { | |
8041 | Safefree(trie->charmap); | |
8042 | if (trie->widecharmap) | |
8043 | SvREFCNT_dec((SV*)trie->widecharmap); | |
8044 | Safefree(trie->states); | |
8045 | Safefree(trie->trans); | |
8046 | if (trie->bitmap) | |
8047 | Safefree(trie->bitmap); | |
8048 | if (trie->wordlen) | |
8049 | Safefree(trie->wordlen); | |
786e8c11 YO |
8050 | if (trie->jump) |
8051 | Safefree(trie->jump); | |
8052 | if (trie->nextword) | |
8053 | Safefree(trie->nextword); | |
a3621e74 | 8054 | #ifdef DEBUGGING |
be8e71aa YO |
8055 | if (RX_DEBUG(r)) { |
8056 | if (trie->words) | |
8057 | SvREFCNT_dec((SV*)trie->words); | |
8058 | if (trie->revcharmap) | |
8059 | SvREFCNT_dec((SV*)trie->revcharmap); | |
8060 | } | |
a3621e74 | 8061 | #endif |
07be1b83 | 8062 | Safefree(r->data->data[n]); /* do this last!!!! */ |
a3621e74 | 8063 | } |
07be1b83 YO |
8064 | } |
8065 | break; | |
c277df42 | 8066 | default: |
830247a4 | 8067 | Perl_croak(aTHX_ "panic: regfree data code '%c'", r->data->what[n]); |
c277df42 IZ |
8068 | } |
8069 | } | |
8070 | Safefree(r->data->what); | |
8071 | Safefree(r->data); | |
a0d0e21e LW |
8072 | } |
8073 | Safefree(r->startp); | |
8074 | Safefree(r->endp); | |
8075 | Safefree(r); | |
a687059c | 8076 | } |
c277df42 | 8077 | |
84da74a7 YO |
8078 | #define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t)) |
8079 | #define av_dup_inc(s,t) (AV*)SvREFCNT_inc(sv_dup((SV*)s,t)) | |
81714fb9 | 8080 | #define hv_dup_inc(s,t) (HV*)SvREFCNT_inc(sv_dup((SV*)s,t)) |
84da74a7 YO |
8081 | #define SAVEPVN(p,n) ((p) ? savepvn(p,n) : NULL) |
8082 | ||
8083 | /* | |
8084 | regdupe - duplicate a regexp. | |
8085 | ||
8086 | This routine is called by sv.c's re_dup and is expected to clone a | |
8087 | given regexp structure. It is a no-op when not under USE_ITHREADS. | |
8088 | (Originally this *was* re_dup() for change history see sv.c) | |
8089 | ||
8090 | See pregfree() above if you change anything here. | |
8091 | */ | |
a3c0e9ca | 8092 | #if defined(USE_ITHREADS) |
84da74a7 YO |
8093 | regexp * |
8094 | Perl_regdupe(pTHX_ const regexp *r, CLONE_PARAMS *param) | |
8095 | { | |
84da74a7 YO |
8096 | dVAR; |
8097 | REGEXP *ret; | |
8098 | int i, len, npar; | |
8099 | struct reg_substr_datum *s; | |
8100 | ||
8101 | if (!r) | |
8102 | return (REGEXP *)NULL; | |
8103 | ||
8104 | if ((ret = (REGEXP *)ptr_table_fetch(PL_ptr_table, r))) | |
8105 | return ret; | |
8106 | ||
8107 | len = r->offsets[0]; | |
8108 | npar = r->nparens+1; | |
8109 | ||
8110 | Newxc(ret, sizeof(regexp) + (len+1)*sizeof(regnode), char, regexp); | |
8111 | Copy(r->program, ret->program, len+1, regnode); | |
8112 | ||
8113 | Newx(ret->startp, npar, I32); | |
8114 | Copy(r->startp, ret->startp, npar, I32); | |
8115 | Newx(ret->endp, npar, I32); | |
8116 | Copy(r->startp, ret->startp, npar, I32); | |
8117 | ||
8118 | Newx(ret->substrs, 1, struct reg_substr_data); | |
8119 | for (s = ret->substrs->data, i = 0; i < 3; i++, s++) { | |
8120 | s->min_offset = r->substrs->data[i].min_offset; | |
8121 | s->max_offset = r->substrs->data[i].max_offset; | |
8122 | s->end_shift = r->substrs->data[i].end_shift; | |
8123 | s->substr = sv_dup_inc(r->substrs->data[i].substr, param); | |
8124 | s->utf8_substr = sv_dup_inc(r->substrs->data[i].utf8_substr, param); | |
8125 | } | |
8126 | ||
8127 | ret->regstclass = NULL; | |
8128 | if (r->data) { | |
8129 | struct reg_data *d; | |
8130 | const int count = r->data->count; | |
8131 | int i; | |
8132 | ||
8133 | Newxc(d, sizeof(struct reg_data) + count*sizeof(void *), | |
8134 | char, struct reg_data); | |
8135 | Newx(d->what, count, U8); | |
8136 | ||
8137 | d->count = count; | |
8138 | for (i = 0; i < count; i++) { | |
8139 | d->what[i] = r->data->what[i]; | |
8140 | switch (d->what[i]) { | |
8141 | /* legal options are one of: sfpont | |
8142 | see also regcomp.h and pregfree() */ | |
8143 | case 's': | |
81714fb9 | 8144 | case 'S': |
84da74a7 YO |
8145 | d->data[i] = sv_dup_inc((SV *)r->data->data[i], param); |
8146 | break; | |
8147 | case 'p': | |
8148 | d->data[i] = av_dup_inc((AV *)r->data->data[i], param); | |
8149 | break; | |
8150 | case 'f': | |
8151 | /* This is cheating. */ | |
8152 | Newx(d->data[i], 1, struct regnode_charclass_class); | |
8153 | StructCopy(r->data->data[i], d->data[i], | |
8154 | struct regnode_charclass_class); | |
8155 | ret->regstclass = (regnode*)d->data[i]; | |
8156 | break; | |
8157 | case 'o': | |
8158 | /* Compiled op trees are readonly, and can thus be | |
8159 | shared without duplication. */ | |
8160 | OP_REFCNT_LOCK; | |
8161 | d->data[i] = (void*)OpREFCNT_inc((OP*)r->data->data[i]); | |
8162 | OP_REFCNT_UNLOCK; | |
8163 | break; | |
8164 | case 'n': | |
8165 | d->data[i] = r->data->data[i]; | |
8166 | break; | |
8167 | case 't': | |
8168 | d->data[i] = r->data->data[i]; | |
8169 | OP_REFCNT_LOCK; | |
8170 | ((reg_trie_data*)d->data[i])->refcount++; | |
8171 | OP_REFCNT_UNLOCK; | |
8172 | break; | |
8173 | case 'T': | |
8174 | d->data[i] = r->data->data[i]; | |
8175 | OP_REFCNT_LOCK; | |
8176 | ((reg_ac_data*)d->data[i])->refcount++; | |
8177 | OP_REFCNT_UNLOCK; | |
8178 | /* Trie stclasses are readonly and can thus be shared | |
8179 | * without duplication. We free the stclass in pregfree | |
8180 | * when the corresponding reg_ac_data struct is freed. | |
8181 | */ | |
8182 | ret->regstclass= r->regstclass; | |
8183 | break; | |
8184 | default: | |
8185 | Perl_croak(aTHX_ "panic: re_dup unknown data code '%c'", r->data->what[i]); | |
8186 | } | |
8187 | } | |
8188 | ||
8189 | ret->data = d; | |
8190 | } | |
8191 | else | |
8192 | ret->data = NULL; | |
8193 | ||
8194 | Newx(ret->offsets, 2*len+1, U32); | |
8195 | Copy(r->offsets, ret->offsets, 2*len+1, U32); | |
8196 | ||
8197 | ret->precomp = SAVEPVN(r->precomp, r->prelen); | |
8198 | ret->refcnt = r->refcnt; | |
8199 | ret->minlen = r->minlen; | |
8200 | ret->prelen = r->prelen; | |
8201 | ret->nparens = r->nparens; | |
8202 | ret->lastparen = r->lastparen; | |
8203 | ret->lastcloseparen = r->lastcloseparen; | |
8204 | ret->reganch = r->reganch; | |
8205 | ||
8206 | ret->sublen = r->sublen; | |
8207 | ||
f9f4320a | 8208 | ret->engine = r->engine; |
81714fb9 YO |
8209 | |
8210 | ret->paren_names = hv_dup_inc(r->paren_names, param); | |
f9f4320a | 8211 | |
84da74a7 YO |
8212 | if (RX_MATCH_COPIED(ret)) |
8213 | ret->subbeg = SAVEPVN(r->subbeg, r->sublen); | |
8214 | else | |
8215 | ret->subbeg = NULL; | |
8216 | #ifdef PERL_OLD_COPY_ON_WRITE | |
8217 | ret->saved_copy = NULL; | |
8218 | #endif | |
8219 | ||
8220 | ptr_table_store(PL_ptr_table, r, ret); | |
8221 | return ret; | |
84da74a7 | 8222 | } |
a3c0e9ca | 8223 | #endif |
84da74a7 | 8224 | |
76234dfb | 8225 | #ifndef PERL_IN_XSUB_RE |
c277df42 IZ |
8226 | /* |
8227 | - regnext - dig the "next" pointer out of a node | |
c277df42 IZ |
8228 | */ |
8229 | regnode * | |
864dbfa3 | 8230 | Perl_regnext(pTHX_ register regnode *p) |
c277df42 | 8231 | { |
97aff369 | 8232 | dVAR; |
c277df42 IZ |
8233 | register I32 offset; |
8234 | ||
3280af22 | 8235 | if (p == &PL_regdummy) |
c277df42 IZ |
8236 | return(NULL); |
8237 | ||
8238 | offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p)); | |
8239 | if (offset == 0) | |
8240 | return(NULL); | |
8241 | ||
c277df42 | 8242 | return(p+offset); |
c277df42 | 8243 | } |
76234dfb | 8244 | #endif |
c277df42 | 8245 | |
01f988be | 8246 | STATIC void |
cea2e8a9 | 8247 | S_re_croak2(pTHX_ const char* pat1,const char* pat2,...) |
c277df42 IZ |
8248 | { |
8249 | va_list args; | |
8250 | STRLEN l1 = strlen(pat1); | |
8251 | STRLEN l2 = strlen(pat2); | |
8252 | char buf[512]; | |
06bf62c7 | 8253 | SV *msv; |
73d840c0 | 8254 | const char *message; |
c277df42 IZ |
8255 | |
8256 | if (l1 > 510) | |
8257 | l1 = 510; | |
8258 | if (l1 + l2 > 510) | |
8259 | l2 = 510 - l1; | |
8260 | Copy(pat1, buf, l1 , char); | |
8261 | Copy(pat2, buf + l1, l2 , char); | |
3b818b81 GS |
8262 | buf[l1 + l2] = '\n'; |
8263 | buf[l1 + l2 + 1] = '\0'; | |
8736538c AS |
8264 | #ifdef I_STDARG |
8265 | /* ANSI variant takes additional second argument */ | |
c277df42 | 8266 | va_start(args, pat2); |
8736538c AS |
8267 | #else |
8268 | va_start(args); | |
8269 | #endif | |
5a844595 | 8270 | msv = vmess(buf, &args); |
c277df42 | 8271 | va_end(args); |
cfd0369c | 8272 | message = SvPV_const(msv,l1); |
c277df42 IZ |
8273 | if (l1 > 512) |
8274 | l1 = 512; | |
8275 | Copy(message, buf, l1 , char); | |
197cf9b9 | 8276 | buf[l1-1] = '\0'; /* Overwrite \n */ |
cea2e8a9 | 8277 | Perl_croak(aTHX_ "%s", buf); |
c277df42 | 8278 | } |
a0ed51b3 LW |
8279 | |
8280 | /* XXX Here's a total kludge. But we need to re-enter for swash routines. */ | |
8281 | ||
76234dfb | 8282 | #ifndef PERL_IN_XSUB_RE |
a0ed51b3 | 8283 | void |
864dbfa3 | 8284 | Perl_save_re_context(pTHX) |
b81d288d | 8285 | { |
97aff369 | 8286 | dVAR; |
1ade1aa1 NC |
8287 | |
8288 | struct re_save_state *state; | |
8289 | ||
8290 | SAVEVPTR(PL_curcop); | |
8291 | SSGROW(SAVESTACK_ALLOC_FOR_RE_SAVE_STATE + 1); | |
8292 | ||
8293 | state = (struct re_save_state *)(PL_savestack + PL_savestack_ix); | |
8294 | PL_savestack_ix += SAVESTACK_ALLOC_FOR_RE_SAVE_STATE; | |
8295 | SSPUSHINT(SAVEt_RE_STATE); | |
8296 | ||
46ab3289 | 8297 | Copy(&PL_reg_state, state, 1, struct re_save_state); |
1ade1aa1 | 8298 | |
a0ed51b3 | 8299 | PL_reg_start_tmp = 0; |
a0ed51b3 | 8300 | PL_reg_start_tmpl = 0; |
c445ea15 | 8301 | PL_reg_oldsaved = NULL; |
a5db57d6 | 8302 | PL_reg_oldsavedlen = 0; |
a5db57d6 | 8303 | PL_reg_maxiter = 0; |
a5db57d6 | 8304 | PL_reg_leftiter = 0; |
c445ea15 | 8305 | PL_reg_poscache = NULL; |
a5db57d6 | 8306 | PL_reg_poscache_size = 0; |
1ade1aa1 NC |
8307 | #ifdef PERL_OLD_COPY_ON_WRITE |
8308 | PL_nrs = NULL; | |
8309 | #endif | |
ada6e8a9 | 8310 | |
c445ea15 AL |
8311 | /* Save $1..$n (#18107: UTF-8 s/(\w+)/uc($1)/e); AMS 20021106. */ |
8312 | if (PL_curpm) { | |
8313 | const REGEXP * const rx = PM_GETRE(PL_curpm); | |
8314 | if (rx) { | |
1df70142 | 8315 | U32 i; |
ada6e8a9 | 8316 | for (i = 1; i <= rx->nparens; i++) { |
1df70142 | 8317 | char digits[TYPE_CHARS(long)]; |
d9fad198 | 8318 | const STRLEN len = my_snprintf(digits, sizeof(digits), "%lu", (long)i); |
49f27e4b NC |
8319 | GV *const *const gvp |
8320 | = (GV**)hv_fetch(PL_defstash, digits, len, 0); | |
8321 | ||
b37c2d43 AL |
8322 | if (gvp) { |
8323 | GV * const gv = *gvp; | |
8324 | if (SvTYPE(gv) == SVt_PVGV && GvSV(gv)) | |
8325 | save_scalar(gv); | |
49f27e4b | 8326 | } |
ada6e8a9 AMS |
8327 | } |
8328 | } | |
8329 | } | |
a0ed51b3 | 8330 | } |
76234dfb | 8331 | #endif |
51371543 | 8332 | |
51371543 | 8333 | static void |
acfe0abc | 8334 | clear_re(pTHX_ void *r) |
51371543 | 8335 | { |
97aff369 | 8336 | dVAR; |
51371543 GS |
8337 | ReREFCNT_dec((regexp *)r); |
8338 | } | |
ffbc6a93 | 8339 | |
a28509cc AL |
8340 | #ifdef DEBUGGING |
8341 | ||
8342 | STATIC void | |
8343 | S_put_byte(pTHX_ SV *sv, int c) | |
8344 | { | |
8345 | if (isCNTRL(c) || c == 255 || !isPRINT(c)) | |
8346 | Perl_sv_catpvf(aTHX_ sv, "\\%o", c); | |
8347 | else if (c == '-' || c == ']' || c == '\\' || c == '^') | |
8348 | Perl_sv_catpvf(aTHX_ sv, "\\%c", c); | |
8349 | else | |
8350 | Perl_sv_catpvf(aTHX_ sv, "%c", c); | |
8351 | } | |
8352 | ||
786e8c11 | 8353 | |
3dab1dad YO |
8354 | #define CLEAR_OPTSTART \ |
8355 | if (optstart) STMT_START { \ | |
07be1b83 | 8356 | DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log, " (%d nodes)\n", node - optstart)); \ |
3dab1dad YO |
8357 | optstart=NULL; \ |
8358 | } STMT_END | |
8359 | ||
786e8c11 | 8360 | #define DUMPUNTIL(b,e) CLEAR_OPTSTART; node=dumpuntil(r,start,(b),(e),last,sv,indent+1,depth+1); |
3dab1dad | 8361 | |
b5a2f8d8 NC |
8362 | STATIC const regnode * |
8363 | S_dumpuntil(pTHX_ const regexp *r, const regnode *start, const regnode *node, | |
786e8c11 YO |
8364 | const regnode *last, const regnode *plast, |
8365 | SV* sv, I32 indent, U32 depth) | |
a28509cc | 8366 | { |
97aff369 | 8367 | dVAR; |
786e8c11 | 8368 | register U8 op = PSEUDO; /* Arbitrary non-END op. */ |
b5a2f8d8 | 8369 | register const regnode *next; |
3dab1dad YO |
8370 | const regnode *optstart= NULL; |
8371 | GET_RE_DEBUG_FLAGS_DECL; | |
a28509cc | 8372 | |
786e8c11 YO |
8373 | #ifdef DEBUG_DUMPUNTIL |
8374 | PerlIO_printf(Perl_debug_log, "--- %d : %d - %d - %d\n",indent,node-start, | |
8375 | last ? last-start : 0,plast ? plast-start : 0); | |
8376 | #endif | |
8377 | ||
8378 | if (plast && plast < last) | |
8379 | last= plast; | |
8380 | ||
8381 | while (PL_regkind[op] != END && (!last || node < last)) { | |
a28509cc AL |
8382 | /* While that wasn't END last time... */ |
8383 | ||
8384 | NODE_ALIGN(node); | |
8385 | op = OP(node); | |
8386 | if (op == CLOSE) | |
786e8c11 | 8387 | indent--; |
b5a2f8d8 | 8388 | next = regnext((regnode *)node); |
07be1b83 | 8389 | |
a28509cc | 8390 | /* Where, what. */ |
8e11feef | 8391 | if (OP(node) == OPTIMIZED) { |
e68ec53f | 8392 | if (!optstart && RE_DEBUG_FLAG(RE_DEBUG_COMPILE_OPTIMISE)) |
8e11feef | 8393 | optstart = node; |
3dab1dad | 8394 | else |
8e11feef | 8395 | goto after_print; |
3dab1dad YO |
8396 | } else |
8397 | CLEAR_OPTSTART; | |
07be1b83 | 8398 | |
32fc9b6a | 8399 | regprop(r, sv, node); |
a28509cc | 8400 | PerlIO_printf(Perl_debug_log, "%4"IVdf":%*s%s", (IV)(node - start), |
786e8c11 | 8401 | (int)(2*indent + 1), "", SvPVX_const(sv)); |
3dab1dad YO |
8402 | |
8403 | if (OP(node) != OPTIMIZED) { | |
8e11feef RGS |
8404 | if (next == NULL) /* Next ptr. */ |
8405 | PerlIO_printf(Perl_debug_log, "(0)"); | |
786e8c11 YO |
8406 | else if (PL_regkind[(U8)op] == BRANCH && PL_regkind[OP(next)] != BRANCH ) |
8407 | PerlIO_printf(Perl_debug_log, "(FAIL)"); | |
8e11feef RGS |
8408 | else |
8409 | PerlIO_printf(Perl_debug_log, "(%"IVdf")", (IV)(next - start)); | |
786e8c11 | 8410 | |
1de06328 | 8411 | /*if (PL_regkind[(U8)op] != TRIE)*/ |
786e8c11 | 8412 | (void)PerlIO_putc(Perl_debug_log, '\n'); |
3dab1dad YO |
8413 | } |
8414 | ||
a28509cc AL |
8415 | after_print: |
8416 | if (PL_regkind[(U8)op] == BRANCHJ) { | |
be8e71aa YO |
8417 | assert(next); |
8418 | { | |
8419 | register const regnode *nnode = (OP(next) == LONGJMP | |
b5a2f8d8 NC |
8420 | ? regnext((regnode *)next) |
8421 | : next); | |
be8e71aa YO |
8422 | if (last && nnode > last) |
8423 | nnode = last; | |
786e8c11 | 8424 | DUMPUNTIL(NEXTOPER(NEXTOPER(node)), nnode); |
be8e71aa | 8425 | } |
a28509cc AL |
8426 | } |
8427 | else if (PL_regkind[(U8)op] == BRANCH) { | |
be8e71aa | 8428 | assert(next); |
786e8c11 | 8429 | DUMPUNTIL(NEXTOPER(node), next); |
a28509cc AL |
8430 | } |
8431 | else if ( PL_regkind[(U8)op] == TRIE ) { | |
1de06328 | 8432 | const char op = OP(node); |
a28509cc | 8433 | const I32 n = ARG(node); |
1de06328 YO |
8434 | const reg_ac_data * const ac = op>=AHOCORASICK ? |
8435 | (reg_ac_data *)r->data->data[n] : | |
8436 | NULL; | |
8437 | const reg_trie_data * const trie = op<AHOCORASICK ? | |
8438 | (reg_trie_data*)r->data->data[n] : | |
8439 | ac->trie; | |
786e8c11 | 8440 | const regnode *nextbranch= NULL; |
a28509cc | 8441 | I32 word_idx; |
1de06328 | 8442 | sv_setpvn(sv, "", 0); |
786e8c11 | 8443 | for (word_idx= 0; word_idx < (I32)trie->wordcount; word_idx++) { |
097eb12c | 8444 | SV ** const elem_ptr = av_fetch(trie->words,word_idx,0); |
786e8c11 YO |
8445 | |
8446 | PerlIO_printf(Perl_debug_log, "%*s%s ", | |
8447 | (int)(2*(indent+3)), "", | |
8448 | elem_ptr ? pv_pretty(sv, SvPV_nolen_const(*elem_ptr), SvCUR(*elem_ptr), 60, | |
ab3bbdeb YO |
8449 | PL_colors[0], PL_colors[1], |
8450 | (SvUTF8(*elem_ptr) ? PERL_PV_ESCAPE_UNI : 0) | | |
8451 | PERL_PV_PRETTY_ELIPSES | | |
8452 | PERL_PV_PRETTY_LTGT | |
786e8c11 YO |
8453 | ) |
8454 | : "???" | |
8455 | ); | |
8456 | if (trie->jump) { | |
8457 | U16 dist= trie->jump[word_idx+1]; | |
8458 | PerlIO_printf(Perl_debug_log, "(%u)\n",(next - dist) - start); | |
8459 | if (dist) { | |
8460 | if (!nextbranch) | |
8461 | nextbranch= next - trie->jump[0]; | |
8462 | DUMPUNTIL(next - dist, nextbranch); | |
8463 | } | |
8464 | if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH) | |
8465 | nextbranch= regnext((regnode *)nextbranch); | |
8466 | } else { | |
8467 | PerlIO_printf(Perl_debug_log, "\n"); | |
a28509cc | 8468 | } |
786e8c11 YO |
8469 | } |
8470 | if (last && next > last) | |
8471 | node= last; | |
8472 | else | |
8473 | node= next; | |
a28509cc | 8474 | } |
786e8c11 YO |
8475 | else if ( op == CURLY ) { /* "next" might be very big: optimizer */ |
8476 | DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS, | |
8477 | NEXTOPER(node) + EXTRA_STEP_2ARGS + 1); | |
a28509cc AL |
8478 | } |
8479 | else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) { | |
be8e71aa | 8480 | assert(next); |
786e8c11 | 8481 | DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS, next); |
a28509cc AL |
8482 | } |
8483 | else if ( op == PLUS || op == STAR) { | |
786e8c11 | 8484 | DUMPUNTIL(NEXTOPER(node), NEXTOPER(node) + 1); |
a28509cc AL |
8485 | } |
8486 | else if (op == ANYOF) { | |
8487 | /* arglen 1 + class block */ | |
8488 | node += 1 + ((ANYOF_FLAGS(node) & ANYOF_LARGE) | |
8489 | ? ANYOF_CLASS_SKIP : ANYOF_SKIP); | |
8490 | node = NEXTOPER(node); | |
8491 | } | |
8492 | else if (PL_regkind[(U8)op] == EXACT) { | |
8493 | /* Literal string, where present. */ | |
8494 | node += NODE_SZ_STR(node) - 1; | |
8495 | node = NEXTOPER(node); | |
8496 | } | |
8497 | else { | |
8498 | node = NEXTOPER(node); | |
8499 | node += regarglen[(U8)op]; | |
8500 | } | |
8501 | if (op == CURLYX || op == OPEN) | |
786e8c11 | 8502 | indent++; |
a28509cc | 8503 | else if (op == WHILEM) |
786e8c11 | 8504 | indent--; |
a28509cc | 8505 | } |
3dab1dad | 8506 | CLEAR_OPTSTART; |
786e8c11 YO |
8507 | #ifdef DEBUG_DUMPUNTIL |
8508 | PerlIO_printf(Perl_debug_log, "--- %d\n",indent); | |
8509 | #endif | |
1de06328 | 8510 | return node; |
a28509cc AL |
8511 | } |
8512 | ||
8513 | #endif /* DEBUGGING */ | |
8514 | ||
241d1a3b NC |
8515 | /* |
8516 | * Local variables: | |
8517 | * c-indentation-style: bsd | |
8518 | * c-basic-offset: 4 | |
8519 | * indent-tabs-mode: t | |
8520 | * End: | |
8521 | * | |
37442d52 RGS |
8522 | * ex: set ts=8 sts=4 sw=4 noet: |
8523 | */ |