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; | |
1aa99e6b | 120 | I32 utf8; |
fc8cd66c | 121 | HV *charnames; /* cache of named sequences */ |
830247a4 IZ |
122 | #if ADD_TO_REGEXEC |
123 | char *starttry; /* -Dr: where regtry was called. */ | |
124 | #define RExC_starttry (pRExC_state->starttry) | |
125 | #endif | |
3dab1dad | 126 | #ifdef DEBUGGING |
be8e71aa | 127 | const char *lastparse; |
3dab1dad YO |
128 | I32 lastnum; |
129 | #define RExC_lastparse (pRExC_state->lastparse) | |
130 | #define RExC_lastnum (pRExC_state->lastnum) | |
131 | #endif | |
830247a4 IZ |
132 | } RExC_state_t; |
133 | ||
e2509266 | 134 | #define RExC_flags (pRExC_state->flags) |
830247a4 IZ |
135 | #define RExC_precomp (pRExC_state->precomp) |
136 | #define RExC_rx (pRExC_state->rx) | |
fac92740 | 137 | #define RExC_start (pRExC_state->start) |
830247a4 IZ |
138 | #define RExC_end (pRExC_state->end) |
139 | #define RExC_parse (pRExC_state->parse) | |
140 | #define RExC_whilem_seen (pRExC_state->whilem_seen) | |
fac92740 | 141 | #define RExC_offsets (pRExC_state->rx->offsets) /* I am not like the others */ |
830247a4 | 142 | #define RExC_emit (pRExC_state->emit) |
fac92740 | 143 | #define RExC_emit_start (pRExC_state->emit_start) |
830247a4 IZ |
144 | #define RExC_naughty (pRExC_state->naughty) |
145 | #define RExC_sawback (pRExC_state->sawback) | |
146 | #define RExC_seen (pRExC_state->seen) | |
147 | #define RExC_size (pRExC_state->size) | |
148 | #define RExC_npar (pRExC_state->npar) | |
149 | #define RExC_extralen (pRExC_state->extralen) | |
150 | #define RExC_seen_zerolen (pRExC_state->seen_zerolen) | |
151 | #define RExC_seen_evals (pRExC_state->seen_evals) | |
1aa99e6b | 152 | #define RExC_utf8 (pRExC_state->utf8) |
fc8cd66c | 153 | #define RExC_charnames (pRExC_state->charnames) |
830247a4 | 154 | |
a687059c LW |
155 | #define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?') |
156 | #define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \ | |
157 | ((*s) == '{' && regcurly(s))) | |
a687059c | 158 | |
35c8bce7 LW |
159 | #ifdef SPSTART |
160 | #undef SPSTART /* dratted cpp namespace... */ | |
161 | #endif | |
a687059c LW |
162 | /* |
163 | * Flags to be passed up and down. | |
164 | */ | |
a687059c | 165 | #define WORST 0 /* Worst case. */ |
821b33a5 | 166 | #define HASWIDTH 0x1 /* Known to match non-null strings. */ |
a0d0e21e LW |
167 | #define SIMPLE 0x2 /* Simple enough to be STAR/PLUS operand. */ |
168 | #define SPSTART 0x4 /* Starts with * or +. */ | |
169 | #define TRYAGAIN 0x8 /* Weeded out a declaration. */ | |
a687059c | 170 | |
3dab1dad YO |
171 | #define REG_NODE_NUM(x) ((x) ? (int)((x)-RExC_emit_start) : -1) |
172 | ||
07be1b83 YO |
173 | /* whether trie related optimizations are enabled */ |
174 | #if PERL_ENABLE_EXTENDED_TRIE_OPTIMISATION | |
175 | #define TRIE_STUDY_OPT | |
786e8c11 | 176 | #define FULL_TRIE_STUDY |
07be1b83 YO |
177 | #define TRIE_STCLASS |
178 | #endif | |
1de06328 YO |
179 | |
180 | ||
181 | /* About scan_data_t. | |
182 | ||
183 | During optimisation we recurse through the regexp program performing | |
184 | various inplace (keyhole style) optimisations. In addition study_chunk | |
185 | and scan_commit populate this data structure with information about | |
186 | what strings MUST appear in the pattern. We look for the longest | |
187 | string that must appear for at a fixed location, and we look for the | |
188 | longest string that may appear at a floating location. So for instance | |
189 | in the pattern: | |
190 | ||
191 | /FOO[xX]A.*B[xX]BAR/ | |
192 | ||
193 | Both 'FOO' and 'A' are fixed strings. Both 'B' and 'BAR' are floating | |
194 | strings (because they follow a .* construct). study_chunk will identify | |
195 | both FOO and BAR as being the longest fixed and floating strings respectively. | |
196 | ||
197 | The strings can be composites, for instance | |
198 | ||
199 | /(f)(o)(o)/ | |
200 | ||
201 | will result in a composite fixed substring 'foo'. | |
202 | ||
203 | For each string some basic information is maintained: | |
204 | ||
205 | - offset or min_offset | |
206 | This is the position the string must appear at, or not before. | |
207 | It also implicitly (when combined with minlenp) tells us how many | |
208 | character must match before the string we are searching. | |
209 | Likewise when combined with minlenp and the length of the string | |
210 | tells us how many characters must appear after the string we have | |
211 | found. | |
212 | ||
213 | - max_offset | |
214 | Only used for floating strings. This is the rightmost point that | |
215 | the string can appear at. Ifset to I32 max it indicates that the | |
216 | string can occur infinitely far to the right. | |
217 | ||
218 | - minlenp | |
219 | A pointer to the minimum length of the pattern that the string | |
220 | was found inside. This is important as in the case of positive | |
221 | lookahead or positive lookbehind we can have multiple patterns | |
222 | involved. Consider | |
223 | ||
224 | /(?=FOO).*F/ | |
225 | ||
226 | The minimum length of the pattern overall is 3, the minimum length | |
227 | of the lookahead part is 3, but the minimum length of the part that | |
228 | will actually match is 1. So 'FOO's minimum length is 3, but the | |
229 | minimum length for the F is 1. This is important as the minimum length | |
230 | is used to determine offsets in front of and behind the string being | |
231 | looked for. Since strings can be composites this is the length of the | |
232 | pattern at the time it was commited with a scan_commit. Note that | |
233 | the length is calculated by study_chunk, so that the minimum lengths | |
234 | are not known until the full pattern has been compiled, thus the | |
235 | pointer to the value. | |
236 | ||
237 | - lookbehind | |
238 | ||
239 | In the case of lookbehind the string being searched for can be | |
240 | offset past the start point of the final matching string. | |
241 | If this value was just blithely removed from the min_offset it would | |
242 | invalidate some of the calculations for how many chars must match | |
243 | before or after (as they are derived from min_offset and minlen and | |
244 | the length of the string being searched for). | |
245 | When the final pattern is compiled and the data is moved from the | |
246 | scan_data_t structure into the regexp structure the information | |
247 | about lookbehind is factored in, with the information that would | |
248 | have been lost precalculated in the end_shift field for the | |
249 | associated string. | |
250 | ||
251 | The fields pos_min and pos_delta are used to store the minimum offset | |
252 | and the delta to the maximum offset at the current point in the pattern. | |
253 | ||
254 | */ | |
2c2d71f5 JH |
255 | |
256 | typedef struct scan_data_t { | |
1de06328 YO |
257 | /*I32 len_min; unused */ |
258 | /*I32 len_delta; unused */ | |
2c2d71f5 JH |
259 | I32 pos_min; |
260 | I32 pos_delta; | |
261 | SV *last_found; | |
1de06328 | 262 | I32 last_end; /* min value, <0 unless valid. */ |
2c2d71f5 JH |
263 | I32 last_start_min; |
264 | I32 last_start_max; | |
1de06328 YO |
265 | SV **longest; /* Either &l_fixed, or &l_float. */ |
266 | SV *longest_fixed; /* longest fixed string found in pattern */ | |
267 | I32 offset_fixed; /* offset where it starts */ | |
268 | I32 *minlen_fixed; /* pointer to the minlen relevent to the string */ | |
269 | I32 lookbehind_fixed; /* is the position of the string modfied by LB */ | |
270 | SV *longest_float; /* longest floating string found in pattern */ | |
271 | I32 offset_float_min; /* earliest point in string it can appear */ | |
272 | I32 offset_float_max; /* latest point in string it can appear */ | |
273 | I32 *minlen_float; /* pointer to the minlen relevent to the string */ | |
274 | I32 lookbehind_float; /* is the position of the string modified by LB */ | |
2c2d71f5 JH |
275 | I32 flags; |
276 | I32 whilem_c; | |
cb434fcc | 277 | I32 *last_closep; |
653099ff | 278 | struct regnode_charclass_class *start_class; |
2c2d71f5 JH |
279 | } scan_data_t; |
280 | ||
a687059c | 281 | /* |
e50aee73 | 282 | * Forward declarations for pregcomp()'s friends. |
a687059c | 283 | */ |
a0d0e21e | 284 | |
27da23d5 | 285 | static const scan_data_t zero_scan_data = |
1de06328 | 286 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,0}; |
c277df42 IZ |
287 | |
288 | #define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL) | |
07be1b83 YO |
289 | #define SF_BEFORE_SEOL 0x0001 |
290 | #define SF_BEFORE_MEOL 0x0002 | |
c277df42 IZ |
291 | #define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL) |
292 | #define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL) | |
293 | ||
09b7f37c CB |
294 | #ifdef NO_UNARY_PLUS |
295 | # define SF_FIX_SHIFT_EOL (0+2) | |
296 | # define SF_FL_SHIFT_EOL (0+4) | |
297 | #else | |
298 | # define SF_FIX_SHIFT_EOL (+2) | |
299 | # define SF_FL_SHIFT_EOL (+4) | |
300 | #endif | |
c277df42 IZ |
301 | |
302 | #define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL) | |
303 | #define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL) | |
304 | ||
305 | #define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL) | |
306 | #define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */ | |
07be1b83 YO |
307 | #define SF_IS_INF 0x0040 |
308 | #define SF_HAS_PAR 0x0080 | |
309 | #define SF_IN_PAR 0x0100 | |
310 | #define SF_HAS_EVAL 0x0200 | |
311 | #define SCF_DO_SUBSTR 0x0400 | |
653099ff GS |
312 | #define SCF_DO_STCLASS_AND 0x0800 |
313 | #define SCF_DO_STCLASS_OR 0x1000 | |
314 | #define SCF_DO_STCLASS (SCF_DO_STCLASS_AND|SCF_DO_STCLASS_OR) | |
e1901655 | 315 | #define SCF_WHILEM_VISITED_POS 0x2000 |
c277df42 | 316 | |
786e8c11 YO |
317 | #define SCF_TRIE_RESTUDY 0x4000 /* Do restudy? */ |
318 | ||
07be1b83 | 319 | |
eb160463 | 320 | #define UTF (RExC_utf8 != 0) |
e2509266 JH |
321 | #define LOC ((RExC_flags & PMf_LOCALE) != 0) |
322 | #define FOLD ((RExC_flags & PMf_FOLD) != 0) | |
a0ed51b3 | 323 | |
ffc61ed2 | 324 | #define OOB_UNICODE 12345678 |
93733859 | 325 | #define OOB_NAMEDCLASS -1 |
b8c5462f | 326 | |
a0ed51b3 LW |
327 | #define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv)) |
328 | #define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b) | |
329 | ||
8615cb43 | 330 | |
b45f050a JF |
331 | /* length of regex to show in messages that don't mark a position within */ |
332 | #define RegexLengthToShowInErrorMessages 127 | |
333 | ||
334 | /* | |
335 | * If MARKER[12] are adjusted, be sure to adjust the constants at the top | |
336 | * of t/op/regmesg.t, the tests in t/op/re_tests, and those in | |
337 | * op/pragma/warn/regcomp. | |
338 | */ | |
7253e4e3 RK |
339 | #define MARKER1 "<-- HERE" /* marker as it appears in the description */ |
340 | #define MARKER2 " <-- HERE " /* marker as it appears within the regex */ | |
b81d288d | 341 | |
7253e4e3 | 342 | #define REPORT_LOCATION " in regex; marked by " MARKER1 " in m/%.*s" MARKER2 "%s/" |
b45f050a JF |
343 | |
344 | /* | |
345 | * Calls SAVEDESTRUCTOR_X if needed, then calls Perl_croak with the given | |
346 | * arg. Show regex, up to a maximum length. If it's too long, chop and add | |
347 | * "...". | |
348 | */ | |
ccb2c380 | 349 | #define FAIL(msg) STMT_START { \ |
bfed75c6 | 350 | const char *ellipses = ""; \ |
ccb2c380 MP |
351 | IV len = RExC_end - RExC_precomp; \ |
352 | \ | |
353 | if (!SIZE_ONLY) \ | |
354 | SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \ | |
355 | if (len > RegexLengthToShowInErrorMessages) { \ | |
356 | /* chop 10 shorter than the max, to ensure meaning of "..." */ \ | |
357 | len = RegexLengthToShowInErrorMessages - 10; \ | |
358 | ellipses = "..."; \ | |
359 | } \ | |
360 | Perl_croak(aTHX_ "%s in regex m/%.*s%s/", \ | |
361 | msg, (int)len, RExC_precomp, ellipses); \ | |
362 | } STMT_END | |
8615cb43 | 363 | |
b45f050a | 364 | /* |
b45f050a JF |
365 | * Simple_vFAIL -- like FAIL, but marks the current location in the scan |
366 | */ | |
ccb2c380 | 367 | #define Simple_vFAIL(m) STMT_START { \ |
a28509cc | 368 | const IV offset = RExC_parse - RExC_precomp; \ |
ccb2c380 MP |
369 | Perl_croak(aTHX_ "%s" REPORT_LOCATION, \ |
370 | m, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
371 | } STMT_END | |
b45f050a JF |
372 | |
373 | /* | |
374 | * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL() | |
375 | */ | |
ccb2c380 MP |
376 | #define vFAIL(m) STMT_START { \ |
377 | if (!SIZE_ONLY) \ | |
378 | SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \ | |
379 | Simple_vFAIL(m); \ | |
380 | } STMT_END | |
b45f050a JF |
381 | |
382 | /* | |
383 | * Like Simple_vFAIL(), but accepts two arguments. | |
384 | */ | |
ccb2c380 | 385 | #define Simple_vFAIL2(m,a1) STMT_START { \ |
a28509cc | 386 | const IV offset = RExC_parse - RExC_precomp; \ |
ccb2c380 MP |
387 | S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, \ |
388 | (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
389 | } STMT_END | |
b45f050a JF |
390 | |
391 | /* | |
392 | * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL2(). | |
393 | */ | |
ccb2c380 MP |
394 | #define vFAIL2(m,a1) STMT_START { \ |
395 | if (!SIZE_ONLY) \ | |
396 | SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \ | |
397 | Simple_vFAIL2(m, a1); \ | |
398 | } STMT_END | |
b45f050a JF |
399 | |
400 | ||
401 | /* | |
402 | * Like Simple_vFAIL(), but accepts three arguments. | |
403 | */ | |
ccb2c380 | 404 | #define Simple_vFAIL3(m, a1, a2) STMT_START { \ |
a28509cc | 405 | const IV offset = RExC_parse - RExC_precomp; \ |
ccb2c380 MP |
406 | S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, \ |
407 | (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
408 | } STMT_END | |
b45f050a JF |
409 | |
410 | /* | |
411 | * Calls SAVEDESTRUCTOR_X if needed, then Simple_vFAIL3(). | |
412 | */ | |
ccb2c380 MP |
413 | #define vFAIL3(m,a1,a2) STMT_START { \ |
414 | if (!SIZE_ONLY) \ | |
415 | SAVEDESTRUCTOR_X(clear_re,(void*)RExC_rx); \ | |
416 | Simple_vFAIL3(m, a1, a2); \ | |
417 | } STMT_END | |
b45f050a JF |
418 | |
419 | /* | |
420 | * Like Simple_vFAIL(), but accepts four arguments. | |
421 | */ | |
ccb2c380 | 422 | #define Simple_vFAIL4(m, a1, a2, a3) STMT_START { \ |
a28509cc | 423 | const IV offset = RExC_parse - RExC_precomp; \ |
ccb2c380 MP |
424 | S_re_croak2(aTHX_ m, REPORT_LOCATION, a1, a2, a3, \ |
425 | (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
426 | } STMT_END | |
b45f050a | 427 | |
ccb2c380 | 428 | #define vWARN(loc,m) STMT_START { \ |
a28509cc | 429 | const IV offset = loc - RExC_precomp; \ |
ccb2c380 MP |
430 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), "%s" REPORT_LOCATION, \ |
431 | m, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
432 | } STMT_END | |
433 | ||
434 | #define vWARNdep(loc,m) STMT_START { \ | |
a28509cc | 435 | const IV offset = loc - RExC_precomp; \ |
ccb2c380 MP |
436 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_REGEXP), \ |
437 | "%s" REPORT_LOCATION, \ | |
438 | m, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
439 | } STMT_END | |
440 | ||
441 | ||
442 | #define vWARN2(loc, m, a1) STMT_START { \ | |
a28509cc | 443 | const IV offset = loc - RExC_precomp; \ |
ccb2c380 MP |
444 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
445 | a1, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
446 | } STMT_END | |
447 | ||
448 | #define vWARN3(loc, m, a1, a2) STMT_START { \ | |
a28509cc | 449 | const IV offset = loc - RExC_precomp; \ |
ccb2c380 MP |
450 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
451 | a1, a2, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
452 | } STMT_END | |
453 | ||
454 | #define vWARN4(loc, m, a1, a2, a3) STMT_START { \ | |
a28509cc | 455 | const IV offset = loc - RExC_precomp; \ |
ccb2c380 MP |
456 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
457 | a1, a2, a3, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
458 | } STMT_END | |
459 | ||
460 | #define vWARN5(loc, m, a1, a2, a3, a4) STMT_START { \ | |
a28509cc | 461 | const IV offset = loc - RExC_precomp; \ |
ccb2c380 MP |
462 | Perl_warner(aTHX_ packWARN(WARN_REGEXP), m REPORT_LOCATION, \ |
463 | a1, a2, a3, a4, (int)offset, RExC_precomp, RExC_precomp + offset); \ | |
464 | } STMT_END | |
9d1d55b5 | 465 | |
8615cb43 | 466 | |
cd439c50 | 467 | /* Allow for side effects in s */ |
ccb2c380 MP |
468 | #define REGC(c,s) STMT_START { \ |
469 | if (!SIZE_ONLY) *(s) = (c); else (void)(s); \ | |
470 | } STMT_END | |
cd439c50 | 471 | |
fac92740 MJD |
472 | /* Macros for recording node offsets. 20001227 mjd@plover.com |
473 | * Nodes are numbered 1, 2, 3, 4. Node #n's position is recorded in | |
474 | * element 2*n-1 of the array. Element #2n holds the byte length node #n. | |
475 | * Element 0 holds the number n. | |
07be1b83 | 476 | * Position is 1 indexed. |
fac92740 MJD |
477 | */ |
478 | ||
ccb2c380 MP |
479 | #define Set_Node_Offset_To_R(node,byte) STMT_START { \ |
480 | if (! SIZE_ONLY) { \ | |
481 | MJD_OFFSET_DEBUG(("** (%d) offset of node %d is %d.\n", \ | |
07be1b83 | 482 | __LINE__, (node), (int)(byte))); \ |
ccb2c380 | 483 | if((node) < 0) { \ |
551405c4 | 484 | Perl_croak(aTHX_ "value of node is %d in Offset macro", (int)(node)); \ |
ccb2c380 MP |
485 | } else { \ |
486 | RExC_offsets[2*(node)-1] = (byte); \ | |
487 | } \ | |
488 | } \ | |
489 | } STMT_END | |
490 | ||
491 | #define Set_Node_Offset(node,byte) \ | |
492 | Set_Node_Offset_To_R((node)-RExC_emit_start, (byte)-RExC_start) | |
493 | #define Set_Cur_Node_Offset Set_Node_Offset(RExC_emit, RExC_parse) | |
494 | ||
495 | #define Set_Node_Length_To_R(node,len) STMT_START { \ | |
496 | if (! SIZE_ONLY) { \ | |
497 | MJD_OFFSET_DEBUG(("** (%d) size of node %d is %d.\n", \ | |
551405c4 | 498 | __LINE__, (int)(node), (int)(len))); \ |
ccb2c380 | 499 | if((node) < 0) { \ |
551405c4 | 500 | Perl_croak(aTHX_ "value of node is %d in Length macro", (int)(node)); \ |
ccb2c380 MP |
501 | } else { \ |
502 | RExC_offsets[2*(node)] = (len); \ | |
503 | } \ | |
504 | } \ | |
505 | } STMT_END | |
506 | ||
507 | #define Set_Node_Length(node,len) \ | |
508 | Set_Node_Length_To_R((node)-RExC_emit_start, len) | |
509 | #define Set_Cur_Node_Length(len) Set_Node_Length(RExC_emit, len) | |
510 | #define Set_Node_Cur_Length(node) \ | |
511 | Set_Node_Length(node, RExC_parse - parse_start) | |
fac92740 MJD |
512 | |
513 | /* Get offsets and lengths */ | |
514 | #define Node_Offset(n) (RExC_offsets[2*((n)-RExC_emit_start)-1]) | |
515 | #define Node_Length(n) (RExC_offsets[2*((n)-RExC_emit_start)]) | |
516 | ||
07be1b83 YO |
517 | #define Set_Node_Offset_Length(node,offset,len) STMT_START { \ |
518 | Set_Node_Offset_To_R((node)-RExC_emit_start, (offset)); \ | |
519 | Set_Node_Length_To_R((node)-RExC_emit_start, (len)); \ | |
520 | } STMT_END | |
521 | ||
522 | ||
523 | #if PERL_ENABLE_EXPERIMENTAL_REGEX_OPTIMISATIONS | |
524 | #define EXPERIMENTAL_INPLACESCAN | |
525 | #endif | |
526 | ||
1de06328 YO |
527 | #define DEBUG_STUDYDATA(data,depth) \ |
528 | DEBUG_OPTIMISE_r(if(data){ \ | |
529 | PerlIO_printf(Perl_debug_log, \ | |
530 | "%*s"/* Len:%"IVdf"/%"IVdf" */" Pos:%"IVdf"/%"IVdf \ | |
531 | " Flags: %"IVdf" Whilem_c: %"IVdf" Lcp: %"IVdf" ", \ | |
532 | (int)(depth)*2, "", \ | |
533 | (IV)((data)->pos_min), \ | |
534 | (IV)((data)->pos_delta), \ | |
535 | (IV)((data)->flags), \ | |
536 | (IV)((data)->whilem_c), \ | |
537 | (IV)((data)->last_closep ? *((data)->last_closep) : -1) \ | |
538 | ); \ | |
539 | if ((data)->last_found) \ | |
540 | PerlIO_printf(Perl_debug_log, \ | |
541 | "Last:'%s' %"IVdf":%"IVdf"/%"IVdf" %sFixed:'%s' @ %"IVdf \ | |
542 | " %sFloat: '%s' @ %"IVdf"/%"IVdf"", \ | |
543 | SvPVX_const((data)->last_found), \ | |
544 | (IV)((data)->last_end), \ | |
545 | (IV)((data)->last_start_min), \ | |
546 | (IV)((data)->last_start_max), \ | |
547 | ((data)->longest && \ | |
548 | (data)->longest==&((data)->longest_fixed)) ? "*" : "", \ | |
549 | SvPVX_const((data)->longest_fixed), \ | |
550 | (IV)((data)->offset_fixed), \ | |
551 | ((data)->longest && \ | |
552 | (data)->longest==&((data)->longest_float)) ? "*" : "", \ | |
553 | SvPVX_const((data)->longest_float), \ | |
554 | (IV)((data)->offset_float_min), \ | |
555 | (IV)((data)->offset_float_max) \ | |
556 | ); \ | |
557 | PerlIO_printf(Perl_debug_log,"\n"); \ | |
558 | }); | |
559 | ||
acfe0abc | 560 | static void clear_re(pTHX_ void *r); |
4327152a | 561 | |
653099ff | 562 | /* Mark that we cannot extend a found fixed substring at this point. |
786e8c11 | 563 | Update the longest found anchored substring and the longest found |
653099ff GS |
564 | floating substrings if needed. */ |
565 | ||
4327152a | 566 | STATIC void |
1de06328 | 567 | S_scan_commit(pTHX_ const RExC_state_t *pRExC_state, scan_data_t *data, I32 *minlenp) |
c277df42 | 568 | { |
e1ec3a88 AL |
569 | const STRLEN l = CHR_SVLEN(data->last_found); |
570 | const STRLEN old_l = CHR_SVLEN(*data->longest); | |
1de06328 | 571 | GET_RE_DEBUG_FLAGS_DECL; |
b81d288d | 572 | |
c277df42 | 573 | if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) { |
6b43b216 | 574 | SvSetMagicSV(*data->longest, data->last_found); |
c277df42 IZ |
575 | if (*data->longest == data->longest_fixed) { |
576 | data->offset_fixed = l ? data->last_start_min : data->pos_min; | |
577 | if (data->flags & SF_BEFORE_EOL) | |
b81d288d | 578 | data->flags |
c277df42 IZ |
579 | |= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL); |
580 | else | |
581 | data->flags &= ~SF_FIX_BEFORE_EOL; | |
1de06328 YO |
582 | data->minlen_fixed=minlenp; |
583 | data->lookbehind_fixed=0; | |
a0ed51b3 LW |
584 | } |
585 | else { | |
c277df42 | 586 | data->offset_float_min = l ? data->last_start_min : data->pos_min; |
b81d288d AB |
587 | data->offset_float_max = (l |
588 | ? data->last_start_max | |
c277df42 | 589 | : data->pos_min + data->pos_delta); |
9051bda5 HS |
590 | if ((U32)data->offset_float_max > (U32)I32_MAX) |
591 | data->offset_float_max = I32_MAX; | |
c277df42 | 592 | if (data->flags & SF_BEFORE_EOL) |
b81d288d | 593 | data->flags |
c277df42 IZ |
594 | |= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL); |
595 | else | |
596 | data->flags &= ~SF_FL_BEFORE_EOL; | |
1de06328 YO |
597 | data->minlen_float=minlenp; |
598 | data->lookbehind_float=0; | |
c277df42 IZ |
599 | } |
600 | } | |
601 | SvCUR_set(data->last_found, 0); | |
0eda9292 | 602 | { |
a28509cc | 603 | SV * const sv = data->last_found; |
097eb12c AL |
604 | if (SvUTF8(sv) && SvMAGICAL(sv)) { |
605 | MAGIC * const mg = mg_find(sv, PERL_MAGIC_utf8); | |
606 | if (mg) | |
607 | mg->mg_len = 0; | |
608 | } | |
0eda9292 | 609 | } |
c277df42 IZ |
610 | data->last_end = -1; |
611 | data->flags &= ~SF_BEFORE_EOL; | |
1de06328 | 612 | DEBUG_STUDYDATA(data,0); |
c277df42 IZ |
613 | } |
614 | ||
653099ff GS |
615 | /* Can match anything (initialization) */ |
616 | STATIC void | |
097eb12c | 617 | S_cl_anything(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl) |
653099ff | 618 | { |
653099ff | 619 | ANYOF_CLASS_ZERO(cl); |
f8bef550 | 620 | ANYOF_BITMAP_SETALL(cl); |
1aa99e6b | 621 | cl->flags = ANYOF_EOS|ANYOF_UNICODE_ALL; |
653099ff GS |
622 | if (LOC) |
623 | cl->flags |= ANYOF_LOCALE; | |
624 | } | |
625 | ||
626 | /* Can match anything (initialization) */ | |
627 | STATIC int | |
5f66b61c | 628 | S_cl_is_anything(const struct regnode_charclass_class *cl) |
653099ff GS |
629 | { |
630 | int value; | |
631 | ||
aaa51d5e | 632 | for (value = 0; value <= ANYOF_MAX; value += 2) |
653099ff GS |
633 | if (ANYOF_CLASS_TEST(cl, value) && ANYOF_CLASS_TEST(cl, value + 1)) |
634 | return 1; | |
1aa99e6b IH |
635 | if (!(cl->flags & ANYOF_UNICODE_ALL)) |
636 | return 0; | |
10edeb5d | 637 | if (!ANYOF_BITMAP_TESTALLSET((const void*)cl)) |
f8bef550 | 638 | return 0; |
653099ff GS |
639 | return 1; |
640 | } | |
641 | ||
642 | /* Can match anything (initialization) */ | |
643 | STATIC void | |
097eb12c | 644 | S_cl_init(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl) |
653099ff | 645 | { |
8ecf7187 | 646 | Zero(cl, 1, struct regnode_charclass_class); |
653099ff | 647 | cl->type = ANYOF; |
830247a4 | 648 | cl_anything(pRExC_state, cl); |
653099ff GS |
649 | } |
650 | ||
651 | STATIC void | |
097eb12c | 652 | S_cl_init_zero(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl) |
653099ff | 653 | { |
8ecf7187 | 654 | Zero(cl, 1, struct regnode_charclass_class); |
653099ff | 655 | cl->type = ANYOF; |
830247a4 | 656 | cl_anything(pRExC_state, cl); |
653099ff GS |
657 | if (LOC) |
658 | cl->flags |= ANYOF_LOCALE; | |
659 | } | |
660 | ||
661 | /* 'And' a given class with another one. Can create false positives */ | |
662 | /* We assume that cl is not inverted */ | |
663 | STATIC void | |
5f66b61c | 664 | S_cl_and(struct regnode_charclass_class *cl, |
a28509cc | 665 | const struct regnode_charclass_class *and_with) |
653099ff | 666 | { |
653099ff GS |
667 | if (!(and_with->flags & ANYOF_CLASS) |
668 | && !(cl->flags & ANYOF_CLASS) | |
669 | && (and_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE) | |
670 | && !(and_with->flags & ANYOF_FOLD) | |
671 | && !(cl->flags & ANYOF_FOLD)) { | |
672 | int i; | |
673 | ||
674 | if (and_with->flags & ANYOF_INVERT) | |
675 | for (i = 0; i < ANYOF_BITMAP_SIZE; i++) | |
676 | cl->bitmap[i] &= ~and_with->bitmap[i]; | |
677 | else | |
678 | for (i = 0; i < ANYOF_BITMAP_SIZE; i++) | |
679 | cl->bitmap[i] &= and_with->bitmap[i]; | |
680 | } /* XXXX: logic is complicated otherwise, leave it along for a moment. */ | |
681 | if (!(and_with->flags & ANYOF_EOS)) | |
682 | cl->flags &= ~ANYOF_EOS; | |
1aa99e6b | 683 | |
14ebb1a2 JH |
684 | if (cl->flags & ANYOF_UNICODE_ALL && and_with->flags & ANYOF_UNICODE && |
685 | !(and_with->flags & ANYOF_INVERT)) { | |
1aa99e6b IH |
686 | cl->flags &= ~ANYOF_UNICODE_ALL; |
687 | cl->flags |= ANYOF_UNICODE; | |
688 | ARG_SET(cl, ARG(and_with)); | |
689 | } | |
14ebb1a2 JH |
690 | if (!(and_with->flags & ANYOF_UNICODE_ALL) && |
691 | !(and_with->flags & ANYOF_INVERT)) | |
1aa99e6b | 692 | cl->flags &= ~ANYOF_UNICODE_ALL; |
14ebb1a2 JH |
693 | if (!(and_with->flags & (ANYOF_UNICODE|ANYOF_UNICODE_ALL)) && |
694 | !(and_with->flags & ANYOF_INVERT)) | |
1aa99e6b | 695 | cl->flags &= ~ANYOF_UNICODE; |
653099ff GS |
696 | } |
697 | ||
698 | /* 'OR' a given class with another one. Can create false positives */ | |
699 | /* We assume that cl is not inverted */ | |
700 | STATIC void | |
097eb12c | 701 | S_cl_or(const RExC_state_t *pRExC_state, struct regnode_charclass_class *cl, const struct regnode_charclass_class *or_with) |
653099ff | 702 | { |
653099ff GS |
703 | if (or_with->flags & ANYOF_INVERT) { |
704 | /* We do not use | |
705 | * (B1 | CL1) | (!B2 & !CL2) = (B1 | !B2 & !CL2) | (CL1 | (!B2 & !CL2)) | |
706 | * <= (B1 | !B2) | (CL1 | !CL2) | |
707 | * which is wasteful if CL2 is small, but we ignore CL2: | |
708 | * (B1 | CL1) | (!B2 & !CL2) <= (B1 | CL1) | !B2 = (B1 | !B2) | CL1 | |
709 | * XXXX Can we handle case-fold? Unclear: | |
710 | * (OK1(i) | OK1(i')) | !(OK1(i) | OK1(i')) = | |
711 | * (OK1(i) | OK1(i')) | (!OK1(i) & !OK1(i')) | |
712 | */ | |
713 | if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE) | |
714 | && !(or_with->flags & ANYOF_FOLD) | |
715 | && !(cl->flags & ANYOF_FOLD) ) { | |
716 | int i; | |
717 | ||
718 | for (i = 0; i < ANYOF_BITMAP_SIZE; i++) | |
719 | cl->bitmap[i] |= ~or_with->bitmap[i]; | |
720 | } /* XXXX: logic is complicated otherwise */ | |
721 | else { | |
830247a4 | 722 | cl_anything(pRExC_state, cl); |
653099ff GS |
723 | } |
724 | } else { | |
725 | /* (B1 | CL1) | (B2 | CL2) = (B1 | B2) | (CL1 | CL2)) */ | |
726 | if ( (or_with->flags & ANYOF_LOCALE) == (cl->flags & ANYOF_LOCALE) | |
b81d288d | 727 | && (!(or_with->flags & ANYOF_FOLD) |
653099ff GS |
728 | || (cl->flags & ANYOF_FOLD)) ) { |
729 | int i; | |
730 | ||
731 | /* OR char bitmap and class bitmap separately */ | |
732 | for (i = 0; i < ANYOF_BITMAP_SIZE; i++) | |
733 | cl->bitmap[i] |= or_with->bitmap[i]; | |
734 | if (or_with->flags & ANYOF_CLASS) { | |
735 | for (i = 0; i < ANYOF_CLASSBITMAP_SIZE; i++) | |
736 | cl->classflags[i] |= or_with->classflags[i]; | |
737 | cl->flags |= ANYOF_CLASS; | |
738 | } | |
739 | } | |
740 | else { /* XXXX: logic is complicated, leave it along for a moment. */ | |
830247a4 | 741 | cl_anything(pRExC_state, cl); |
653099ff GS |
742 | } |
743 | } | |
744 | if (or_with->flags & ANYOF_EOS) | |
745 | cl->flags |= ANYOF_EOS; | |
1aa99e6b IH |
746 | |
747 | if (cl->flags & ANYOF_UNICODE && or_with->flags & ANYOF_UNICODE && | |
748 | ARG(cl) != ARG(or_with)) { | |
749 | cl->flags |= ANYOF_UNICODE_ALL; | |
750 | cl->flags &= ~ANYOF_UNICODE; | |
751 | } | |
752 | if (or_with->flags & ANYOF_UNICODE_ALL) { | |
753 | cl->flags |= ANYOF_UNICODE_ALL; | |
754 | cl->flags &= ~ANYOF_UNICODE; | |
755 | } | |
653099ff GS |
756 | } |
757 | ||
a3621e74 YO |
758 | #define TRIE_LIST_ITEM(state,idx) (trie->states[state].trans.list)[ idx ] |
759 | #define TRIE_LIST_CUR(state) ( TRIE_LIST_ITEM( state, 0 ).forid ) | |
760 | #define TRIE_LIST_LEN(state) ( TRIE_LIST_ITEM( state, 0 ).newstate ) | |
761 | #define TRIE_LIST_USED(idx) ( trie->states[state].trans.list ? (TRIE_LIST_CUR( idx ) - 1) : 0 ) | |
762 | ||
3dab1dad YO |
763 | |
764 | #ifdef DEBUGGING | |
07be1b83 | 765 | /* |
3dab1dad YO |
766 | dump_trie(trie) |
767 | dump_trie_interim_list(trie,next_alloc) | |
768 | dump_trie_interim_table(trie,next_alloc) | |
769 | ||
770 | These routines dump out a trie in a somewhat readable format. | |
07be1b83 YO |
771 | The _interim_ variants are used for debugging the interim |
772 | tables that are used to generate the final compressed | |
773 | representation which is what dump_trie expects. | |
774 | ||
3dab1dad YO |
775 | Part of the reason for their existance is to provide a form |
776 | of documentation as to how the different representations function. | |
07be1b83 YO |
777 | |
778 | */ | |
3dab1dad YO |
779 | |
780 | /* | |
781 | dump_trie(trie) | |
782 | Dumps the final compressed table form of the trie to Perl_debug_log. | |
783 | Used for debugging make_trie(). | |
784 | */ | |
785 | ||
786 | STATIC void | |
787 | S_dump_trie(pTHX_ const struct _reg_trie_data *trie,U32 depth) | |
788 | { | |
789 | U32 state; | |
ab3bbdeb YO |
790 | SV *sv=sv_newmortal(); |
791 | int colwidth= trie->widecharmap ? 6 : 4; | |
3dab1dad YO |
792 | GET_RE_DEBUG_FLAGS_DECL; |
793 | ||
ab3bbdeb | 794 | |
3dab1dad YO |
795 | PerlIO_printf( Perl_debug_log, "%*sChar : %-6s%-6s%-4s ", |
796 | (int)depth * 2 + 2,"", | |
797 | "Match","Base","Ofs" ); | |
798 | ||
799 | for( state = 0 ; state < trie->uniquecharcount ; state++ ) { | |
be8e71aa | 800 | SV ** const tmp = av_fetch( trie->revcharmap, state, 0); |
3dab1dad | 801 | if ( tmp ) { |
ab3bbdeb YO |
802 | PerlIO_printf( Perl_debug_log, "%*s", |
803 | colwidth, | |
ddc5bc0f | 804 | pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth, |
ab3bbdeb YO |
805 | PL_colors[0], PL_colors[1], |
806 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) | | |
807 | PERL_PV_ESCAPE_FIRSTCHAR | |
808 | ) | |
809 | ); | |
3dab1dad YO |
810 | } |
811 | } | |
812 | PerlIO_printf( Perl_debug_log, "\n%*sState|-----------------------", | |
813 | (int)depth * 2 + 2,""); | |
814 | ||
815 | for( state = 0 ; state < trie->uniquecharcount ; state++ ) | |
ab3bbdeb | 816 | PerlIO_printf( Perl_debug_log, "%.*s", colwidth, "--------"); |
3dab1dad YO |
817 | PerlIO_printf( Perl_debug_log, "\n"); |
818 | ||
786e8c11 | 819 | for( state = 1 ; state < trie->laststate ; state++ ) { |
be8e71aa | 820 | const U32 base = trie->states[ state ].trans.base; |
3dab1dad YO |
821 | |
822 | PerlIO_printf( Perl_debug_log, "%*s#%4"UVXf"|", (int)depth * 2 + 2,"", (UV)state); | |
823 | ||
824 | if ( trie->states[ state ].wordnum ) { | |
825 | PerlIO_printf( Perl_debug_log, " W%4X", trie->states[ state ].wordnum ); | |
826 | } else { | |
827 | PerlIO_printf( Perl_debug_log, "%6s", "" ); | |
828 | } | |
829 | ||
830 | PerlIO_printf( Perl_debug_log, " @%4"UVXf" ", (UV)base ); | |
831 | ||
832 | if ( base ) { | |
833 | U32 ofs = 0; | |
834 | ||
835 | while( ( base + ofs < trie->uniquecharcount ) || | |
836 | ( base + ofs - trie->uniquecharcount < trie->lasttrans | |
837 | && trie->trans[ base + ofs - trie->uniquecharcount ].check != state)) | |
838 | ofs++; | |
839 | ||
840 | PerlIO_printf( Perl_debug_log, "+%2"UVXf"[ ", (UV)ofs); | |
841 | ||
842 | for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) { | |
843 | if ( ( base + ofs >= trie->uniquecharcount ) && | |
844 | ( base + ofs - trie->uniquecharcount < trie->lasttrans ) && | |
845 | trie->trans[ base + ofs - trie->uniquecharcount ].check == state ) | |
846 | { | |
ab3bbdeb YO |
847 | PerlIO_printf( Perl_debug_log, "%*"UVXf, |
848 | colwidth, | |
3dab1dad YO |
849 | (UV)trie->trans[ base + ofs - trie->uniquecharcount ].next ); |
850 | } else { | |
ab3bbdeb | 851 | PerlIO_printf( Perl_debug_log, "%*s",colwidth," ." ); |
3dab1dad YO |
852 | } |
853 | } | |
854 | ||
855 | PerlIO_printf( Perl_debug_log, "]"); | |
856 | ||
857 | } | |
858 | PerlIO_printf( Perl_debug_log, "\n" ); | |
859 | } | |
860 | } | |
861 | /* | |
862 | dump_trie_interim_list(trie,next_alloc) | |
863 | Dumps a fully constructed but uncompressed trie in list form. | |
864 | List tries normally only are used for construction when the number of | |
865 | possible chars (trie->uniquecharcount) is very high. | |
866 | Used for debugging make_trie(). | |
867 | */ | |
868 | STATIC void | |
869 | S_dump_trie_interim_list(pTHX_ const struct _reg_trie_data *trie, U32 next_alloc,U32 depth) | |
870 | { | |
871 | U32 state; | |
ab3bbdeb YO |
872 | SV *sv=sv_newmortal(); |
873 | int colwidth= trie->widecharmap ? 6 : 4; | |
3dab1dad YO |
874 | GET_RE_DEBUG_FLAGS_DECL; |
875 | /* print out the table precompression. */ | |
ab3bbdeb YO |
876 | PerlIO_printf( Perl_debug_log, "%*sState :Word | Transition Data\n%*s%s", |
877 | (int)depth * 2 + 2,"", (int)depth * 2 + 2,"", | |
878 | "------:-----+-----------------\n" ); | |
3dab1dad YO |
879 | |
880 | for( state=1 ; state < next_alloc ; state ++ ) { | |
881 | U16 charid; | |
882 | ||
ab3bbdeb | 883 | PerlIO_printf( Perl_debug_log, "%*s %4"UVXf" :", |
3dab1dad YO |
884 | (int)depth * 2 + 2,"", (UV)state ); |
885 | if ( ! trie->states[ state ].wordnum ) { | |
886 | PerlIO_printf( Perl_debug_log, "%5s| ",""); | |
887 | } else { | |
888 | PerlIO_printf( Perl_debug_log, "W%4x| ", | |
889 | trie->states[ state ].wordnum | |
890 | ); | |
891 | } | |
892 | for( charid = 1 ; charid <= TRIE_LIST_USED( state ) ; charid++ ) { | |
be8e71aa | 893 | SV ** const tmp = av_fetch( trie->revcharmap, TRIE_LIST_ITEM(state,charid).forid, 0); |
ab3bbdeb YO |
894 | if ( tmp ) { |
895 | PerlIO_printf( Perl_debug_log, "%*s:%3X=%4"UVXf" | ", | |
896 | colwidth, | |
ddc5bc0f | 897 | pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth, |
ab3bbdeb YO |
898 | PL_colors[0], PL_colors[1], |
899 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) | | |
900 | PERL_PV_ESCAPE_FIRSTCHAR | |
901 | ) , | |
3dab1dad YO |
902 | TRIE_LIST_ITEM(state,charid).forid, |
903 | (UV)TRIE_LIST_ITEM(state,charid).newstate | |
904 | ); | |
905 | } | |
ab3bbdeb YO |
906 | } |
907 | PerlIO_printf( Perl_debug_log, "\n"); | |
3dab1dad YO |
908 | } |
909 | } | |
910 | ||
911 | /* | |
912 | dump_trie_interim_table(trie,next_alloc) | |
913 | Dumps a fully constructed but uncompressed trie in table form. | |
914 | This is the normal DFA style state transition table, with a few | |
915 | twists to facilitate compression later. | |
916 | Used for debugging make_trie(). | |
917 | */ | |
918 | STATIC void | |
919 | S_dump_trie_interim_table(pTHX_ const struct _reg_trie_data *trie, U32 next_alloc, U32 depth) | |
920 | { | |
921 | U32 state; | |
922 | U16 charid; | |
ab3bbdeb YO |
923 | SV *sv=sv_newmortal(); |
924 | int colwidth= trie->widecharmap ? 6 : 4; | |
3dab1dad YO |
925 | GET_RE_DEBUG_FLAGS_DECL; |
926 | ||
927 | /* | |
928 | print out the table precompression so that we can do a visual check | |
929 | that they are identical. | |
930 | */ | |
931 | ||
932 | PerlIO_printf( Perl_debug_log, "%*sChar : ",(int)depth * 2 + 2,"" ); | |
933 | ||
934 | for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) { | |
be8e71aa | 935 | SV ** const tmp = av_fetch( trie->revcharmap, charid, 0); |
3dab1dad | 936 | if ( tmp ) { |
ab3bbdeb YO |
937 | PerlIO_printf( Perl_debug_log, "%*s", |
938 | colwidth, | |
ddc5bc0f | 939 | pv_pretty(sv, SvPV_nolen_const(*tmp), SvCUR(*tmp), colwidth, |
ab3bbdeb YO |
940 | PL_colors[0], PL_colors[1], |
941 | (SvUTF8(*tmp) ? PERL_PV_ESCAPE_UNI : 0) | | |
942 | PERL_PV_ESCAPE_FIRSTCHAR | |
943 | ) | |
944 | ); | |
3dab1dad YO |
945 | } |
946 | } | |
947 | ||
948 | PerlIO_printf( Perl_debug_log, "\n%*sState+-",(int)depth * 2 + 2,"" ); | |
949 | ||
950 | for( charid=0 ; charid < trie->uniquecharcount ; charid++ ) { | |
ab3bbdeb | 951 | PerlIO_printf( Perl_debug_log, "%.*s", colwidth,"--------"); |
3dab1dad YO |
952 | } |
953 | ||
954 | PerlIO_printf( Perl_debug_log, "\n" ); | |
955 | ||
956 | for( state=1 ; state < next_alloc ; state += trie->uniquecharcount ) { | |
957 | ||
958 | PerlIO_printf( Perl_debug_log, "%*s%4"UVXf" : ", | |
959 | (int)depth * 2 + 2,"", | |
960 | (UV)TRIE_NODENUM( state ) ); | |
961 | ||
962 | for( charid = 0 ; charid < trie->uniquecharcount ; charid++ ) { | |
ab3bbdeb YO |
963 | UV v=(UV)SAFE_TRIE_NODENUM( trie->trans[ state + charid ].next ); |
964 | if (v) | |
965 | PerlIO_printf( Perl_debug_log, "%*"UVXf, colwidth, v ); | |
966 | else | |
967 | PerlIO_printf( Perl_debug_log, "%*s", colwidth, "." ); | |
3dab1dad YO |
968 | } |
969 | if ( ! trie->states[ TRIE_NODENUM( state ) ].wordnum ) { | |
970 | PerlIO_printf( Perl_debug_log, " (%4"UVXf")\n", (UV)trie->trans[ state ].check ); | |
971 | } else { | |
972 | PerlIO_printf( Perl_debug_log, " (%4"UVXf") W%4X\n", (UV)trie->trans[ state ].check, | |
973 | trie->states[ TRIE_NODENUM( state ) ].wordnum ); | |
974 | } | |
975 | } | |
07be1b83 | 976 | } |
3dab1dad YO |
977 | |
978 | #endif | |
979 | ||
786e8c11 YO |
980 | /* make_trie(startbranch,first,last,tail,word_count,flags,depth) |
981 | startbranch: the first branch in the whole branch sequence | |
982 | first : start branch of sequence of branch-exact nodes. | |
983 | May be the same as startbranch | |
984 | last : Thing following the last branch. | |
985 | May be the same as tail. | |
986 | tail : item following the branch sequence | |
987 | count : words in the sequence | |
988 | flags : currently the OP() type we will be building one of /EXACT(|F|Fl)/ | |
989 | depth : indent depth | |
3dab1dad | 990 | |
786e8c11 | 991 | Inplace optimizes a sequence of 2 or more Branch-Exact nodes into a TRIE node. |
07be1b83 | 992 | |
786e8c11 YO |
993 | A trie is an N'ary tree where the branches are determined by digital |
994 | decomposition of the key. IE, at the root node you look up the 1st character and | |
995 | follow that branch repeat until you find the end of the branches. Nodes can be | |
996 | marked as "accepting" meaning they represent a complete word. Eg: | |
07be1b83 | 997 | |
786e8c11 | 998 | /he|she|his|hers/ |
72f13be8 | 999 | |
786e8c11 YO |
1000 | would convert into the following structure. Numbers represent states, letters |
1001 | following numbers represent valid transitions on the letter from that state, if | |
1002 | the number is in square brackets it represents an accepting state, otherwise it | |
1003 | will be in parenthesis. | |
07be1b83 | 1004 | |
786e8c11 YO |
1005 | +-h->+-e->[3]-+-r->(8)-+-s->[9] |
1006 | | | | |
1007 | | (2) | |
1008 | | | | |
1009 | (1) +-i->(6)-+-s->[7] | |
1010 | | | |
1011 | +-s->(3)-+-h->(4)-+-e->[5] | |
07be1b83 | 1012 | |
786e8c11 YO |
1013 | Accept Word Mapping: 3=>1 (he),5=>2 (she), 7=>3 (his), 9=>4 (hers) |
1014 | ||
1015 | This shows that when matching against the string 'hers' we will begin at state 1 | |
1016 | read 'h' and move to state 2, read 'e' and move to state 3 which is accepting, | |
1017 | then read 'r' and go to state 8 followed by 's' which takes us to state 9 which | |
1018 | is also accepting. Thus we know that we can match both 'he' and 'hers' with a | |
1019 | single traverse. We store a mapping from accepting to state to which word was | |
1020 | matched, and then when we have multiple possibilities we try to complete the | |
1021 | rest of the regex in the order in which they occured in the alternation. | |
1022 | ||
1023 | The only prior NFA like behaviour that would be changed by the TRIE support is | |
1024 | the silent ignoring of duplicate alternations which are of the form: | |
1025 | ||
1026 | / (DUPE|DUPE) X? (?{ ... }) Y /x | |
1027 | ||
1028 | Thus EVAL blocks follwing a trie may be called a different number of times with | |
1029 | and without the optimisation. With the optimisations dupes will be silently | |
1030 | ignored. This inconsistant behaviour of EVAL type nodes is well established as | |
1031 | the following demonstrates: | |
1032 | ||
1033 | 'words'=~/(word|word|word)(?{ print $1 })[xyz]/ | |
1034 | ||
1035 | which prints out 'word' three times, but | |
1036 | ||
1037 | 'words'=~/(word|word|word)(?{ print $1 })S/ | |
1038 | ||
1039 | which doesnt print it out at all. This is due to other optimisations kicking in. | |
1040 | ||
1041 | Example of what happens on a structural level: | |
1042 | ||
1043 | The regexp /(ac|ad|ab)+/ will produce the folowing debug output: | |
1044 | ||
1045 | 1: CURLYM[1] {1,32767}(18) | |
1046 | 5: BRANCH(8) | |
1047 | 6: EXACT <ac>(16) | |
1048 | 8: BRANCH(11) | |
1049 | 9: EXACT <ad>(16) | |
1050 | 11: BRANCH(14) | |
1051 | 12: EXACT <ab>(16) | |
1052 | 16: SUCCEED(0) | |
1053 | 17: NOTHING(18) | |
1054 | 18: END(0) | |
1055 | ||
1056 | This would be optimizable with startbranch=5, first=5, last=16, tail=16 | |
1057 | and should turn into: | |
1058 | ||
1059 | 1: CURLYM[1] {1,32767}(18) | |
1060 | 5: TRIE(16) | |
1061 | [Words:3 Chars Stored:6 Unique Chars:4 States:5 NCP:1] | |
1062 | <ac> | |
1063 | <ad> | |
1064 | <ab> | |
1065 | 16: SUCCEED(0) | |
1066 | 17: NOTHING(18) | |
1067 | 18: END(0) | |
1068 | ||
1069 | Cases where tail != last would be like /(?foo|bar)baz/: | |
1070 | ||
1071 | 1: BRANCH(4) | |
1072 | 2: EXACT <foo>(8) | |
1073 | 4: BRANCH(7) | |
1074 | 5: EXACT <bar>(8) | |
1075 | 7: TAIL(8) | |
1076 | 8: EXACT <baz>(10) | |
1077 | 10: END(0) | |
1078 | ||
1079 | which would be optimizable with startbranch=1, first=1, last=7, tail=8 | |
1080 | and would end up looking like: | |
1081 | ||
1082 | 1: TRIE(8) | |
1083 | [Words:2 Chars Stored:6 Unique Chars:5 States:7 NCP:1] | |
1084 | <foo> | |
1085 | <bar> | |
1086 | 7: TAIL(8) | |
1087 | 8: EXACT <baz>(10) | |
1088 | 10: END(0) | |
1089 | ||
1090 | d = uvuni_to_utf8_flags(d, uv, 0); | |
1091 | ||
1092 | is the recommended Unicode-aware way of saying | |
1093 | ||
1094 | *(d++) = uv; | |
1095 | */ | |
1096 | ||
1097 | #define TRIE_STORE_REVCHAR \ | |
1098 | STMT_START { \ | |
1099 | SV *tmp = Perl_newSVpvf_nocontext( "%c", (int)uvc ); \ | |
1100 | if (UTF) SvUTF8_on(tmp); \ | |
1101 | av_push( TRIE_REVCHARMAP(trie), tmp ); \ | |
1102 | } STMT_END | |
1103 | ||
1104 | #define TRIE_READ_CHAR STMT_START { \ | |
1105 | wordlen++; \ | |
1106 | if ( UTF ) { \ | |
1107 | if ( folder ) { \ | |
1108 | if ( foldlen > 0 ) { \ | |
1109 | uvc = utf8n_to_uvuni( scan, UTF8_MAXLEN, &len, uniflags ); \ | |
1110 | foldlen -= len; \ | |
1111 | scan += len; \ | |
1112 | len = 0; \ | |
1113 | } else { \ | |
1114 | uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\ | |
1115 | uvc = to_uni_fold( uvc, foldbuf, &foldlen ); \ | |
1116 | foldlen -= UNISKIP( uvc ); \ | |
1117 | scan = foldbuf + UNISKIP( uvc ); \ | |
1118 | } \ | |
1119 | } else { \ | |
1120 | uvc = utf8n_to_uvuni( (const U8*)uc, UTF8_MAXLEN, &len, uniflags);\ | |
1121 | } \ | |
1122 | } else { \ | |
1123 | uvc = (U32)*uc; \ | |
1124 | len = 1; \ | |
1125 | } \ | |
1126 | } STMT_END | |
1127 | ||
1128 | ||
1129 | ||
1130 | #define TRIE_LIST_PUSH(state,fid,ns) STMT_START { \ | |
1131 | if ( TRIE_LIST_CUR( state ) >=TRIE_LIST_LEN( state ) ) { \ | |
1132 | TRIE_LIST_LEN( state ) *= 2; \ | |
1133 | Renew( trie->states[ state ].trans.list, \ | |
1134 | TRIE_LIST_LEN( state ), reg_trie_trans_le ); \ | |
1135 | } \ | |
1136 | TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).forid = fid; \ | |
1137 | TRIE_LIST_ITEM( state, TRIE_LIST_CUR( state ) ).newstate = ns; \ | |
1138 | TRIE_LIST_CUR( state )++; \ | |
1139 | } STMT_END | |
07be1b83 | 1140 | |
786e8c11 YO |
1141 | #define TRIE_LIST_NEW(state) STMT_START { \ |
1142 | Newxz( trie->states[ state ].trans.list, \ | |
1143 | 4, reg_trie_trans_le ); \ | |
1144 | TRIE_LIST_CUR( state ) = 1; \ | |
1145 | TRIE_LIST_LEN( state ) = 4; \ | |
1146 | } STMT_END | |
07be1b83 | 1147 | |
786e8c11 YO |
1148 | #define TRIE_HANDLE_WORD(state) STMT_START { \ |
1149 | U16 dupe= trie->states[ state ].wordnum; \ | |
1150 | regnode * const noper_next = regnext( noper ); \ | |
1151 | \ | |
1152 | if (trie->wordlen) \ | |
1153 | trie->wordlen[ curword ] = wordlen; \ | |
1154 | DEBUG_r({ \ | |
1155 | /* store the word for dumping */ \ | |
1156 | SV* tmp; \ | |
1157 | if (OP(noper) != NOTHING) \ | |
1158 | tmp = newSVpvn(STRING(noper), STR_LEN(noper)); \ | |
1159 | else \ | |
1160 | tmp = newSVpvn( "", 0 ); \ | |
1161 | if ( UTF ) SvUTF8_on( tmp ); \ | |
1162 | av_push( trie->words, tmp ); \ | |
1163 | }); \ | |
1164 | \ | |
1165 | curword++; \ | |
1166 | \ | |
1167 | if ( noper_next < tail ) { \ | |
1168 | if (!trie->jump) \ | |
1169 | Newxz( trie->jump, word_count + 1, U16); \ | |
1170 | trie->jump[curword] = (U16)(tail - noper_next); \ | |
1171 | if (!jumper) \ | |
1172 | jumper = noper_next; \ | |
1173 | if (!nextbranch) \ | |
1174 | nextbranch= regnext(cur); \ | |
1175 | } \ | |
1176 | \ | |
1177 | if ( dupe ) { \ | |
1178 | /* So it's a dupe. This means we need to maintain a */\ | |
1179 | /* linked-list from the first to the next. */\ | |
1180 | /* we only allocate the nextword buffer when there */\ | |
1181 | /* a dupe, so first time we have to do the allocation */\ | |
1182 | if (!trie->nextword) \ | |
1183 | Newxz( trie->nextword, word_count + 1, U16); \ | |
1184 | while ( trie->nextword[dupe] ) \ | |
1185 | dupe= trie->nextword[dupe]; \ | |
1186 | trie->nextword[dupe]= curword; \ | |
1187 | } else { \ | |
1188 | /* we haven't inserted this word yet. */ \ | |
1189 | trie->states[ state ].wordnum = curword; \ | |
1190 | } \ | |
1191 | } STMT_END | |
07be1b83 | 1192 | |
3dab1dad | 1193 | |
786e8c11 YO |
1194 | #define TRIE_TRANS_STATE(state,base,ucharcount,charid,special) \ |
1195 | ( ( base + charid >= ucharcount \ | |
1196 | && base + charid < ubound \ | |
1197 | && state == trie->trans[ base - ucharcount + charid ].check \ | |
1198 | && trie->trans[ base - ucharcount + charid ].next ) \ | |
1199 | ? trie->trans[ base - ucharcount + charid ].next \ | |
1200 | : ( state==1 ? special : 0 ) \ | |
1201 | ) | |
3dab1dad | 1202 | |
786e8c11 YO |
1203 | #define MADE_TRIE 1 |
1204 | #define MADE_JUMP_TRIE 2 | |
1205 | #define MADE_EXACT_TRIE 4 | |
3dab1dad | 1206 | |
a3621e74 | 1207 | STATIC I32 |
786e8c11 | 1208 | 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 | 1209 | { |
27da23d5 | 1210 | dVAR; |
a3621e74 YO |
1211 | /* first pass, loop through and scan words */ |
1212 | reg_trie_data *trie; | |
1213 | regnode *cur; | |
9f7f3913 | 1214 | const U32 uniflags = UTF8_ALLOW_DEFAULT; |
a3621e74 YO |
1215 | STRLEN len = 0; |
1216 | UV uvc = 0; | |
1217 | U16 curword = 0; | |
1218 | U32 next_alloc = 0; | |
786e8c11 YO |
1219 | regnode *jumper = NULL; |
1220 | regnode *nextbranch = NULL; | |
a3621e74 | 1221 | /* we just use folder as a flag in utf8 */ |
e1ec3a88 | 1222 | const U8 * const folder = ( flags == EXACTF |
a3621e74 YO |
1223 | ? PL_fold |
1224 | : ( flags == EXACTFL | |
1225 | ? PL_fold_locale | |
1226 | : NULL | |
1227 | ) | |
1228 | ); | |
1229 | ||
e1ec3a88 | 1230 | const U32 data_slot = add_data( pRExC_state, 1, "t" ); |
a3621e74 | 1231 | SV *re_trie_maxbuff; |
3dab1dad YO |
1232 | #ifndef DEBUGGING |
1233 | /* these are only used during construction but are useful during | |
8e11feef | 1234 | * debugging so we store them in the struct when debugging. |
8e11feef | 1235 | */ |
3dab1dad | 1236 | STRLEN trie_charcount=0; |
3dab1dad YO |
1237 | AV *trie_revcharmap; |
1238 | #endif | |
a3621e74 | 1239 | GET_RE_DEBUG_FLAGS_DECL; |
72f13be8 YO |
1240 | #ifndef DEBUGGING |
1241 | PERL_UNUSED_ARG(depth); | |
1242 | #endif | |
a3621e74 | 1243 | |
a02a5408 | 1244 | Newxz( trie, 1, reg_trie_data ); |
a3621e74 | 1245 | trie->refcount = 1; |
3dab1dad | 1246 | trie->startstate = 1; |
786e8c11 | 1247 | trie->wordcount = word_count; |
a3621e74 | 1248 | RExC_rx->data->data[ data_slot ] = (void*)trie; |
a02a5408 | 1249 | Newxz( trie->charmap, 256, U16 ); |
3dab1dad YO |
1250 | if (!(UTF && folder)) |
1251 | Newxz( trie->bitmap, ANYOF_BITMAP_SIZE, char ); | |
a3621e74 YO |
1252 | DEBUG_r({ |
1253 | trie->words = newAV(); | |
a3621e74 | 1254 | }); |
3dab1dad | 1255 | TRIE_REVCHARMAP(trie) = newAV(); |
a3621e74 | 1256 | |
0111c4fd | 1257 | re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1); |
a3621e74 | 1258 | if (!SvIOK(re_trie_maxbuff)) { |
0111c4fd | 1259 | sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT); |
a3621e74 | 1260 | } |
3dab1dad YO |
1261 | DEBUG_OPTIMISE_r({ |
1262 | PerlIO_printf( Perl_debug_log, | |
786e8c11 | 1263 | "%*smake_trie start==%d, first==%d, last==%d, tail==%d depth=%d\n", |
3dab1dad YO |
1264 | (int)depth * 2 + 2, "", |
1265 | REG_NODE_NUM(startbranch),REG_NODE_NUM(first), | |
786e8c11 | 1266 | REG_NODE_NUM(last), REG_NODE_NUM(tail), |
85c3142d | 1267 | (int)depth); |
3dab1dad | 1268 | }); |
a3621e74 YO |
1269 | /* -- First loop and Setup -- |
1270 | ||
1271 | We first traverse the branches and scan each word to determine if it | |
1272 | contains widechars, and how many unique chars there are, this is | |
1273 | important as we have to build a table with at least as many columns as we | |
1274 | have unique chars. | |
1275 | ||
1276 | We use an array of integers to represent the character codes 0..255 | |
1277 | (trie->charmap) and we use a an HV* to store unicode characters. We use the | |
1278 | native representation of the character value as the key and IV's for the | |
1279 | coded index. | |
1280 | ||
1281 | *TODO* If we keep track of how many times each character is used we can | |
1282 | remap the columns so that the table compression later on is more | |
1283 | efficient in terms of memory by ensuring most common value is in the | |
1284 | middle and the least common are on the outside. IMO this would be better | |
1285 | than a most to least common mapping as theres a decent chance the most | |
1286 | common letter will share a node with the least common, meaning the node | |
1287 | will not be compressable. With a middle is most common approach the worst | |
1288 | case is when we have the least common nodes twice. | |
1289 | ||
1290 | */ | |
1291 | ||
a3621e74 | 1292 | for ( cur = first ; cur < last ; cur = regnext( cur ) ) { |
c445ea15 | 1293 | regnode * const noper = NEXTOPER( cur ); |
e1ec3a88 | 1294 | const U8 *uc = (U8*)STRING( noper ); |
a28509cc | 1295 | const U8 * const e = uc + STR_LEN( noper ); |
a3621e74 YO |
1296 | STRLEN foldlen = 0; |
1297 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; | |
2af232bd | 1298 | const U8 *scan = (U8*)NULL; |
07be1b83 | 1299 | U32 wordlen = 0; /* required init */ |
3dab1dad | 1300 | STRLEN chars=0; |
a3621e74 | 1301 | |
3dab1dad YO |
1302 | if (OP(noper) == NOTHING) { |
1303 | trie->minlen= 0; | |
1304 | continue; | |
1305 | } | |
1306 | if (trie->bitmap) { | |
1307 | TRIE_BITMAP_SET(trie,*uc); | |
1308 | if ( folder ) TRIE_BITMAP_SET(trie,folder[ *uc ]); | |
1309 | } | |
a3621e74 | 1310 | for ( ; uc < e ; uc += len ) { |
3dab1dad | 1311 | TRIE_CHARCOUNT(trie)++; |
a3621e74 | 1312 | TRIE_READ_CHAR; |
3dab1dad | 1313 | chars++; |
a3621e74 YO |
1314 | if ( uvc < 256 ) { |
1315 | if ( !trie->charmap[ uvc ] ) { | |
1316 | trie->charmap[ uvc ]=( ++trie->uniquecharcount ); | |
1317 | if ( folder ) | |
1318 | trie->charmap[ folder[ uvc ] ] = trie->charmap[ uvc ]; | |
3dab1dad | 1319 | TRIE_STORE_REVCHAR; |
a3621e74 YO |
1320 | } |
1321 | } else { | |
1322 | SV** svpp; | |
1323 | if ( !trie->widecharmap ) | |
1324 | trie->widecharmap = newHV(); | |
1325 | ||
1326 | svpp = hv_fetch( trie->widecharmap, (char*)&uvc, sizeof( UV ), 1 ); | |
1327 | ||
1328 | if ( !svpp ) | |
e4584336 | 1329 | Perl_croak( aTHX_ "error creating/fetching widecharmap entry for 0x%"UVXf, uvc ); |
a3621e74 YO |
1330 | |
1331 | if ( !SvTRUE( *svpp ) ) { | |
1332 | sv_setiv( *svpp, ++trie->uniquecharcount ); | |
3dab1dad | 1333 | TRIE_STORE_REVCHAR; |
a3621e74 YO |
1334 | } |
1335 | } | |
1336 | } | |
3dab1dad YO |
1337 | if( cur == first ) { |
1338 | trie->minlen=chars; | |
1339 | trie->maxlen=chars; | |
1340 | } else if (chars < trie->minlen) { | |
1341 | trie->minlen=chars; | |
1342 | } else if (chars > trie->maxlen) { | |
1343 | trie->maxlen=chars; | |
1344 | } | |
1345 | ||
a3621e74 YO |
1346 | } /* end first pass */ |
1347 | DEBUG_TRIE_COMPILE_r( | |
3dab1dad YO |
1348 | PerlIO_printf( Perl_debug_log, "%*sTRIE(%s): W:%d C:%d Uq:%d Min:%d Max:%d\n", |
1349 | (int)depth * 2 + 2,"", | |
85c3142d | 1350 | ( trie->widecharmap ? "UTF8" : "NATIVE" ), (int)word_count, |
be8e71aa YO |
1351 | (int)TRIE_CHARCOUNT(trie), trie->uniquecharcount, |
1352 | (int)trie->minlen, (int)trie->maxlen ) | |
a3621e74 | 1353 | ); |
786e8c11 | 1354 | Newxz( trie->wordlen, word_count, U32 ); |
a3621e74 YO |
1355 | |
1356 | /* | |
1357 | We now know what we are dealing with in terms of unique chars and | |
1358 | string sizes so we can calculate how much memory a naive | |
0111c4fd RGS |
1359 | representation using a flat table will take. If it's over a reasonable |
1360 | limit (as specified by ${^RE_TRIE_MAXBUF}) we use a more memory | |
a3621e74 YO |
1361 | conservative but potentially much slower representation using an array |
1362 | of lists. | |
1363 | ||
1364 | At the end we convert both representations into the same compressed | |
1365 | form that will be used in regexec.c for matching with. The latter | |
1366 | is a form that cannot be used to construct with but has memory | |
1367 | properties similar to the list form and access properties similar | |
1368 | to the table form making it both suitable for fast searches and | |
1369 | small enough that its feasable to store for the duration of a program. | |
1370 | ||
1371 | See the comment in the code where the compressed table is produced | |
1372 | inplace from the flat tabe representation for an explanation of how | |
1373 | the compression works. | |
1374 | ||
1375 | */ | |
1376 | ||
1377 | ||
3dab1dad | 1378 | if ( (IV)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1) > SvIV(re_trie_maxbuff) ) { |
a3621e74 YO |
1379 | /* |
1380 | Second Pass -- Array Of Lists Representation | |
1381 | ||
1382 | Each state will be represented by a list of charid:state records | |
1383 | (reg_trie_trans_le) the first such element holds the CUR and LEN | |
1384 | points of the allocated array. (See defines above). | |
1385 | ||
1386 | We build the initial structure using the lists, and then convert | |
1387 | it into the compressed table form which allows faster lookups | |
1388 | (but cant be modified once converted). | |
a3621e74 YO |
1389 | */ |
1390 | ||
a3621e74 YO |
1391 | STRLEN transcount = 1; |
1392 | ||
3dab1dad | 1393 | Newxz( trie->states, TRIE_CHARCOUNT(trie) + 2, reg_trie_state ); |
a3621e74 YO |
1394 | TRIE_LIST_NEW(1); |
1395 | next_alloc = 2; | |
1396 | ||
1397 | for ( cur = first ; cur < last ; cur = regnext( cur ) ) { | |
1398 | ||
c445ea15 AL |
1399 | regnode * const noper = NEXTOPER( cur ); |
1400 | U8 *uc = (U8*)STRING( noper ); | |
1401 | const U8 * const e = uc + STR_LEN( noper ); | |
1402 | U32 state = 1; /* required init */ | |
1403 | U16 charid = 0; /* sanity init */ | |
1404 | U8 *scan = (U8*)NULL; /* sanity init */ | |
1405 | STRLEN foldlen = 0; /* required init */ | |
07be1b83 | 1406 | U32 wordlen = 0; /* required init */ |
c445ea15 AL |
1407 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; |
1408 | ||
3dab1dad | 1409 | if (OP(noper) != NOTHING) { |
786e8c11 | 1410 | for ( ; uc < e ; uc += len ) { |
c445ea15 | 1411 | |
786e8c11 | 1412 | TRIE_READ_CHAR; |
c445ea15 | 1413 | |
786e8c11 YO |
1414 | if ( uvc < 256 ) { |
1415 | charid = trie->charmap[ uvc ]; | |
c445ea15 | 1416 | } else { |
786e8c11 YO |
1417 | SV** const svpp = hv_fetch( trie->widecharmap, (char*)&uvc, sizeof( UV ), 0); |
1418 | if ( !svpp ) { | |
1419 | charid = 0; | |
1420 | } else { | |
1421 | charid=(U16)SvIV( *svpp ); | |
1422 | } | |
c445ea15 | 1423 | } |
786e8c11 YO |
1424 | /* charid is now 0 if we dont know the char read, or nonzero if we do */ |
1425 | if ( charid ) { | |
a3621e74 | 1426 | |
786e8c11 YO |
1427 | U16 check; |
1428 | U32 newstate = 0; | |
a3621e74 | 1429 | |
786e8c11 YO |
1430 | charid--; |
1431 | if ( !trie->states[ state ].trans.list ) { | |
1432 | TRIE_LIST_NEW( state ); | |
c445ea15 | 1433 | } |
786e8c11 YO |
1434 | for ( check = 1; check <= TRIE_LIST_USED( state ); check++ ) { |
1435 | if ( TRIE_LIST_ITEM( state, check ).forid == charid ) { | |
1436 | newstate = TRIE_LIST_ITEM( state, check ).newstate; | |
1437 | break; | |
1438 | } | |
1439 | } | |
1440 | if ( ! newstate ) { | |
1441 | newstate = next_alloc++; | |
1442 | TRIE_LIST_PUSH( state, charid, newstate ); | |
1443 | transcount++; | |
1444 | } | |
1445 | state = newstate; | |
1446 | } else { | |
1447 | Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc ); | |
c445ea15 | 1448 | } |
a28509cc | 1449 | } |
c445ea15 | 1450 | } |
3dab1dad | 1451 | TRIE_HANDLE_WORD(state); |
a3621e74 YO |
1452 | |
1453 | } /* end second pass */ | |
1454 | ||
786e8c11 | 1455 | trie->laststate = next_alloc; |
a3621e74 YO |
1456 | Renew( trie->states, next_alloc, reg_trie_state ); |
1457 | ||
3dab1dad YO |
1458 | /* and now dump it out before we compress it */ |
1459 | DEBUG_TRIE_COMPILE_MORE_r( | |
1460 | dump_trie_interim_list(trie,next_alloc,depth+1) | |
a3621e74 | 1461 | ); |
a3621e74 | 1462 | |
a02a5408 | 1463 | Newxz( trie->trans, transcount ,reg_trie_trans ); |
a3621e74 YO |
1464 | { |
1465 | U32 state; | |
a3621e74 YO |
1466 | U32 tp = 0; |
1467 | U32 zp = 0; | |
1468 | ||
1469 | ||
1470 | for( state=1 ; state < next_alloc ; state ++ ) { | |
1471 | U32 base=0; | |
1472 | ||
1473 | /* | |
1474 | DEBUG_TRIE_COMPILE_MORE_r( | |
1475 | PerlIO_printf( Perl_debug_log, "tp: %d zp: %d ",tp,zp) | |
1476 | ); | |
1477 | */ | |
1478 | ||
1479 | if (trie->states[state].trans.list) { | |
1480 | U16 minid=TRIE_LIST_ITEM( state, 1).forid; | |
1481 | U16 maxid=minid; | |
a28509cc | 1482 | U16 idx; |
a3621e74 YO |
1483 | |
1484 | for( idx = 2 ; idx <= TRIE_LIST_USED( state ) ; idx++ ) { | |
c445ea15 AL |
1485 | const U16 forid = TRIE_LIST_ITEM( state, idx).forid; |
1486 | if ( forid < minid ) { | |
1487 | minid=forid; | |
1488 | } else if ( forid > maxid ) { | |
1489 | maxid=forid; | |
1490 | } | |
a3621e74 YO |
1491 | } |
1492 | if ( transcount < tp + maxid - minid + 1) { | |
1493 | transcount *= 2; | |
1494 | Renew( trie->trans, transcount, reg_trie_trans ); | |
1495 | Zero( trie->trans + (transcount / 2), transcount / 2 , reg_trie_trans ); | |
1496 | } | |
1497 | base = trie->uniquecharcount + tp - minid; | |
1498 | if ( maxid == minid ) { | |
1499 | U32 set = 0; | |
1500 | for ( ; zp < tp ; zp++ ) { | |
1501 | if ( ! trie->trans[ zp ].next ) { | |
1502 | base = trie->uniquecharcount + zp - minid; | |
1503 | trie->trans[ zp ].next = TRIE_LIST_ITEM( state, 1).newstate; | |
1504 | trie->trans[ zp ].check = state; | |
1505 | set = 1; | |
1506 | break; | |
1507 | } | |
1508 | } | |
1509 | if ( !set ) { | |
1510 | trie->trans[ tp ].next = TRIE_LIST_ITEM( state, 1).newstate; | |
1511 | trie->trans[ tp ].check = state; | |
1512 | tp++; | |
1513 | zp = tp; | |
1514 | } | |
1515 | } else { | |
1516 | for ( idx=1; idx <= TRIE_LIST_USED( state ) ; idx++ ) { | |
c445ea15 | 1517 | const U32 tid = base - trie->uniquecharcount + TRIE_LIST_ITEM( state, idx ).forid; |
a3621e74 YO |
1518 | trie->trans[ tid ].next = TRIE_LIST_ITEM( state, idx ).newstate; |
1519 | trie->trans[ tid ].check = state; | |
1520 | } | |
1521 | tp += ( maxid - minid + 1 ); | |
1522 | } | |
1523 | Safefree(trie->states[ state ].trans.list); | |
1524 | } | |
1525 | /* | |
1526 | DEBUG_TRIE_COMPILE_MORE_r( | |
1527 | PerlIO_printf( Perl_debug_log, " base: %d\n",base); | |
1528 | ); | |
1529 | */ | |
1530 | trie->states[ state ].trans.base=base; | |
1531 | } | |
cc601c31 | 1532 | trie->lasttrans = tp + 1; |
a3621e74 YO |
1533 | } |
1534 | } else { | |
1535 | /* | |
1536 | Second Pass -- Flat Table Representation. | |
1537 | ||
1538 | we dont use the 0 slot of either trans[] or states[] so we add 1 to each. | |
1539 | We know that we will need Charcount+1 trans at most to store the data | |
1540 | (one row per char at worst case) So we preallocate both structures | |
1541 | assuming worst case. | |
1542 | ||
1543 | We then construct the trie using only the .next slots of the entry | |
1544 | structs. | |
1545 | ||
1546 | We use the .check field of the first entry of the node temporarily to | |
1547 | make compression both faster and easier by keeping track of how many non | |
1548 | zero fields are in the node. | |
1549 | ||
1550 | Since trans are numbered from 1 any 0 pointer in the table is a FAIL | |
1551 | transition. | |
1552 | ||
1553 | There are two terms at use here: state as a TRIE_NODEIDX() which is a | |
1554 | number representing the first entry of the node, and state as a | |
1555 | TRIE_NODENUM() which is the trans number. state 1 is TRIE_NODEIDX(1) and | |
1556 | TRIE_NODENUM(1), state 2 is TRIE_NODEIDX(2) and TRIE_NODENUM(3) if there | |
1557 | are 2 entrys per node. eg: | |
1558 | ||
1559 | A B A B | |
1560 | 1. 2 4 1. 3 7 | |
1561 | 2. 0 3 3. 0 5 | |
1562 | 3. 0 0 5. 0 0 | |
1563 | 4. 0 0 7. 0 0 | |
1564 | ||
1565 | The table is internally in the right hand, idx form. However as we also | |
1566 | have to deal with the states array which is indexed by nodenum we have to | |
1567 | use TRIE_NODENUM() to convert. | |
1568 | ||
1569 | */ | |
1570 | ||
3dab1dad YO |
1571 | |
1572 | Newxz( trie->trans, ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1, | |
a3621e74 | 1573 | reg_trie_trans ); |
3dab1dad | 1574 | Newxz( trie->states, TRIE_CHARCOUNT(trie) + 2, reg_trie_state ); |
a3621e74 YO |
1575 | next_alloc = trie->uniquecharcount + 1; |
1576 | ||
3dab1dad | 1577 | |
a3621e74 YO |
1578 | for ( cur = first ; cur < last ; cur = regnext( cur ) ) { |
1579 | ||
c445ea15 | 1580 | regnode * const noper = NEXTOPER( cur ); |
a28509cc AL |
1581 | const U8 *uc = (U8*)STRING( noper ); |
1582 | const U8 * const e = uc + STR_LEN( noper ); | |
a3621e74 YO |
1583 | |
1584 | U32 state = 1; /* required init */ | |
1585 | ||
1586 | U16 charid = 0; /* sanity init */ | |
1587 | U32 accept_state = 0; /* sanity init */ | |
1588 | U8 *scan = (U8*)NULL; /* sanity init */ | |
1589 | ||
1590 | STRLEN foldlen = 0; /* required init */ | |
07be1b83 | 1591 | U32 wordlen = 0; /* required init */ |
a3621e74 YO |
1592 | U8 foldbuf[ UTF8_MAXBYTES_CASE + 1 ]; |
1593 | ||
3dab1dad | 1594 | if ( OP(noper) != NOTHING ) { |
786e8c11 | 1595 | for ( ; uc < e ; uc += len ) { |
a3621e74 | 1596 | |
786e8c11 | 1597 | TRIE_READ_CHAR; |
a3621e74 | 1598 | |
786e8c11 YO |
1599 | if ( uvc < 256 ) { |
1600 | charid = trie->charmap[ uvc ]; | |
1601 | } else { | |
1602 | SV* const * const svpp = hv_fetch( trie->widecharmap, (char*)&uvc, sizeof( UV ), 0); | |
1603 | charid = svpp ? (U16)SvIV(*svpp) : 0; | |
a3621e74 | 1604 | } |
786e8c11 YO |
1605 | if ( charid ) { |
1606 | charid--; | |
1607 | if ( !trie->trans[ state + charid ].next ) { | |
1608 | trie->trans[ state + charid ].next = next_alloc; | |
1609 | trie->trans[ state ].check++; | |
1610 | next_alloc += trie->uniquecharcount; | |
1611 | } | |
1612 | state = trie->trans[ state + charid ].next; | |
1613 | } else { | |
1614 | Perl_croak( aTHX_ "panic! In trie construction, no char mapping for %"IVdf, uvc ); | |
1615 | } | |
1616 | /* charid is now 0 if we dont know the char read, or nonzero if we do */ | |
a3621e74 | 1617 | } |
a3621e74 | 1618 | } |
3dab1dad YO |
1619 | accept_state = TRIE_NODENUM( state ); |
1620 | TRIE_HANDLE_WORD(accept_state); | |
a3621e74 YO |
1621 | |
1622 | } /* end second pass */ | |
1623 | ||
3dab1dad YO |
1624 | /* and now dump it out before we compress it */ |
1625 | DEBUG_TRIE_COMPILE_MORE_r( | |
1626 | dump_trie_interim_table(trie,next_alloc,depth+1) | |
1627 | ); | |
a3621e74 | 1628 | |
a3621e74 YO |
1629 | { |
1630 | /* | |
1631 | * Inplace compress the table.* | |
1632 | ||
1633 | For sparse data sets the table constructed by the trie algorithm will | |
1634 | be mostly 0/FAIL transitions or to put it another way mostly empty. | |
1635 | (Note that leaf nodes will not contain any transitions.) | |
1636 | ||
1637 | This algorithm compresses the tables by eliminating most such | |
1638 | transitions, at the cost of a modest bit of extra work during lookup: | |
1639 | ||
1640 | - Each states[] entry contains a .base field which indicates the | |
1641 | index in the state[] array wheres its transition data is stored. | |
1642 | ||
1643 | - If .base is 0 there are no valid transitions from that node. | |
1644 | ||
1645 | - If .base is nonzero then charid is added to it to find an entry in | |
1646 | the trans array. | |
1647 | ||
1648 | -If trans[states[state].base+charid].check!=state then the | |
1649 | transition is taken to be a 0/Fail transition. Thus if there are fail | |
1650 | transitions at the front of the node then the .base offset will point | |
1651 | somewhere inside the previous nodes data (or maybe even into a node | |
1652 | even earlier), but the .check field determines if the transition is | |
1653 | valid. | |
1654 | ||
786e8c11 | 1655 | XXX - wrong maybe? |
a3621e74 YO |
1656 | The following process inplace converts the table to the compressed |
1657 | table: We first do not compress the root node 1,and mark its all its | |
1658 | .check pointers as 1 and set its .base pointer as 1 as well. This | |
1659 | allows to do a DFA construction from the compressed table later, and | |
1660 | ensures that any .base pointers we calculate later are greater than | |
1661 | 0. | |
1662 | ||
1663 | - We set 'pos' to indicate the first entry of the second node. | |
1664 | ||
1665 | - We then iterate over the columns of the node, finding the first and | |
1666 | last used entry at l and m. We then copy l..m into pos..(pos+m-l), | |
1667 | and set the .check pointers accordingly, and advance pos | |
1668 | appropriately and repreat for the next node. Note that when we copy | |
1669 | the next pointers we have to convert them from the original | |
1670 | NODEIDX form to NODENUM form as the former is not valid post | |
1671 | compression. | |
1672 | ||
1673 | - If a node has no transitions used we mark its base as 0 and do not | |
1674 | advance the pos pointer. | |
1675 | ||
1676 | - If a node only has one transition we use a second pointer into the | |
1677 | structure to fill in allocated fail transitions from other states. | |
1678 | This pointer is independent of the main pointer and scans forward | |
1679 | looking for null transitions that are allocated to a state. When it | |
1680 | finds one it writes the single transition into the "hole". If the | |
786e8c11 | 1681 | pointer doesnt find one the single transition is appended as normal. |
a3621e74 YO |
1682 | |
1683 | - Once compressed we can Renew/realloc the structures to release the | |
1684 | excess space. | |
1685 | ||
1686 | See "Table-Compression Methods" in sec 3.9 of the Red Dragon, | |
1687 | specifically Fig 3.47 and the associated pseudocode. | |
1688 | ||
1689 | demq | |
1690 | */ | |
a3b680e6 | 1691 | const U32 laststate = TRIE_NODENUM( next_alloc ); |
a28509cc | 1692 | U32 state, charid; |
a3621e74 | 1693 | U32 pos = 0, zp=0; |
786e8c11 | 1694 | trie->laststate = laststate; |
a3621e74 YO |
1695 | |
1696 | for ( state = 1 ; state < laststate ; state++ ) { | |
1697 | U8 flag = 0; | |
a28509cc AL |
1698 | const U32 stateidx = TRIE_NODEIDX( state ); |
1699 | const U32 o_used = trie->trans[ stateidx ].check; | |
1700 | U32 used = trie->trans[ stateidx ].check; | |
a3621e74 YO |
1701 | trie->trans[ stateidx ].check = 0; |
1702 | ||
1703 | for ( charid = 0 ; used && charid < trie->uniquecharcount ; charid++ ) { | |
1704 | if ( flag || trie->trans[ stateidx + charid ].next ) { | |
1705 | if ( trie->trans[ stateidx + charid ].next ) { | |
1706 | if (o_used == 1) { | |
1707 | for ( ; zp < pos ; zp++ ) { | |
1708 | if ( ! trie->trans[ zp ].next ) { | |
1709 | break; | |
1710 | } | |
1711 | } | |
1712 | trie->states[ state ].trans.base = zp + trie->uniquecharcount - charid ; | |
1713 | trie->trans[ zp ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next ); | |
1714 | trie->trans[ zp ].check = state; | |
1715 | if ( ++zp > pos ) pos = zp; | |
1716 | break; | |
1717 | } | |
1718 | used--; | |
1719 | } | |
1720 | if ( !flag ) { | |
1721 | flag = 1; | |
1722 | trie->states[ state ].trans.base = pos + trie->uniquecharcount - charid ; | |
1723 | } | |
1724 | trie->trans[ pos ].next = SAFE_TRIE_NODENUM( trie->trans[ stateidx + charid ].next ); | |
1725 | trie->trans[ pos ].check = state; | |
1726 | pos++; | |
1727 | } | |
1728 | } | |
1729 | } | |
cc601c31 | 1730 | trie->lasttrans = pos + 1; |
a3621e74 YO |
1731 | Renew( trie->states, laststate + 1, reg_trie_state); |
1732 | DEBUG_TRIE_COMPILE_MORE_r( | |
e4584336 | 1733 | PerlIO_printf( Perl_debug_log, |
3dab1dad YO |
1734 | "%*sAlloc: %d Orig: %"IVdf" elements, Final:%"IVdf". Savings of %%%5.2f\n", |
1735 | (int)depth * 2 + 2,"", | |
1736 | (int)( ( TRIE_CHARCOUNT(trie) + 1 ) * trie->uniquecharcount + 1 ), | |
5d7488b2 AL |
1737 | (IV)next_alloc, |
1738 | (IV)pos, | |
a3621e74 YO |
1739 | ( ( next_alloc - pos ) * 100 ) / (double)next_alloc ); |
1740 | ); | |
1741 | ||
1742 | } /* end table compress */ | |
1743 | } | |
cc601c31 YO |
1744 | /* resize the trans array to remove unused space */ |
1745 | Renew( trie->trans, trie->lasttrans, reg_trie_trans); | |
a3621e74 | 1746 | |
3dab1dad YO |
1747 | /* and now dump out the compressed format */ |
1748 | DEBUG_TRIE_COMPILE_r( | |
1749 | dump_trie(trie,depth+1) | |
1750 | ); | |
07be1b83 | 1751 | |
3dab1dad YO |
1752 | { /* Modify the program and insert the new TRIE node*/ |
1753 | regnode *convert; | |
1754 | U8 nodetype =(U8)(flags & 0xFF); | |
1755 | char *str=NULL; | |
786e8c11 | 1756 | |
07be1b83 | 1757 | #ifdef DEBUGGING |
786e8c11 | 1758 | |
07be1b83 YO |
1759 | U32 mjd_offset; |
1760 | U32 mjd_nodelen; | |
1761 | #endif | |
a3621e74 | 1762 | /* |
3dab1dad YO |
1763 | This means we convert either the first branch or the first Exact, |
1764 | depending on whether the thing following (in 'last') is a branch | |
1765 | or not and whther first is the startbranch (ie is it a sub part of | |
1766 | the alternation or is it the whole thing.) | |
1767 | Assuming its a sub part we conver the EXACT otherwise we convert | |
1768 | the whole branch sequence, including the first. | |
a3621e74 | 1769 | */ |
3dab1dad YO |
1770 | /* Find the node we are going to overwrite */ |
1771 | if ( first == startbranch && OP( last ) != BRANCH ) { | |
07be1b83 | 1772 | /* whole branch chain */ |
3dab1dad | 1773 | convert = first; |
07be1b83 YO |
1774 | DEBUG_r({ |
1775 | const regnode *nop = NEXTOPER( convert ); | |
1776 | mjd_offset= Node_Offset((nop)); | |
1777 | mjd_nodelen= Node_Length((nop)); | |
1778 | }); | |
1779 | } else { | |
1780 | /* branch sub-chain */ | |
3dab1dad YO |
1781 | convert = NEXTOPER( first ); |
1782 | NEXT_OFF( first ) = (U16)(last - first); | |
07be1b83 YO |
1783 | DEBUG_r({ |
1784 | mjd_offset= Node_Offset((convert)); | |
1785 | mjd_nodelen= Node_Length((convert)); | |
1786 | }); | |
1787 | } | |
1788 | DEBUG_OPTIMISE_r( | |
1789 | PerlIO_printf(Perl_debug_log, "%*sMJD offset:%"UVuf" MJD length:%"UVuf"\n", | |
1790 | (int)depth * 2 + 2, "", | |
786e8c11 | 1791 | (UV)mjd_offset, (UV)mjd_nodelen) |
07be1b83 | 1792 | ); |
a3621e74 | 1793 | |
3dab1dad YO |
1794 | /* But first we check to see if there is a common prefix we can |
1795 | split out as an EXACT and put in front of the TRIE node. */ | |
1796 | trie->startstate= 1; | |
786e8c11 | 1797 | if ( trie->bitmap && !trie->widecharmap && !trie->jump ) { |
3dab1dad YO |
1798 | U32 state; |
1799 | DEBUG_OPTIMISE_r( | |
8e11feef RGS |
1800 | PerlIO_printf(Perl_debug_log, "%*sLaststate:%"UVuf"\n", |
1801 | (int)depth * 2 + 2, "", | |
786e8c11 | 1802 | (UV)trie->laststate) |
8e11feef | 1803 | ); |
786e8c11 | 1804 | for ( state = 1 ; state < trie->laststate-1 ; state++ ) { |
a3621e74 | 1805 | U32 ofs = 0; |
8e11feef RGS |
1806 | I32 idx = -1; |
1807 | U32 count = 0; | |
1808 | const U32 base = trie->states[ state ].trans.base; | |
a3621e74 | 1809 | |
3dab1dad | 1810 | if ( trie->states[state].wordnum ) |
8e11feef | 1811 | count = 1; |
a3621e74 | 1812 | |
8e11feef | 1813 | for ( ofs = 0 ; ofs < trie->uniquecharcount ; ofs++ ) { |
cc601c31 YO |
1814 | if ( ( base + ofs >= trie->uniquecharcount ) && |
1815 | ( base + ofs - trie->uniquecharcount < trie->lasttrans ) && | |
a3621e74 YO |
1816 | trie->trans[ base + ofs - trie->uniquecharcount ].check == state ) |
1817 | { | |
3dab1dad | 1818 | if ( ++count > 1 ) { |
8e11feef | 1819 | SV **tmp = av_fetch( TRIE_REVCHARMAP(trie), ofs, 0); |
07be1b83 | 1820 | const U8 *ch = (U8*)SvPV_nolen_const( *tmp ); |
8e11feef | 1821 | if ( state == 1 ) break; |
3dab1dad YO |
1822 | if ( count == 2 ) { |
1823 | Zero(trie->bitmap, ANYOF_BITMAP_SIZE, char); | |
1824 | DEBUG_OPTIMISE_r( | |
8e11feef RGS |
1825 | PerlIO_printf(Perl_debug_log, |
1826 | "%*sNew Start State=%"UVuf" Class: [", | |
1827 | (int)depth * 2 + 2, "", | |
786e8c11 | 1828 | (UV)state)); |
be8e71aa YO |
1829 | if (idx >= 0) { |
1830 | SV ** const tmp = av_fetch( TRIE_REVCHARMAP(trie), idx, 0); | |
1831 | const U8 * const ch = (U8*)SvPV_nolen_const( *tmp ); | |
8e11feef | 1832 | |
3dab1dad | 1833 | TRIE_BITMAP_SET(trie,*ch); |
8e11feef RGS |
1834 | if ( folder ) |
1835 | TRIE_BITMAP_SET(trie, folder[ *ch ]); | |
3dab1dad | 1836 | DEBUG_OPTIMISE_r( |
07be1b83 | 1837 | PerlIO_printf(Perl_debug_log, (char*)ch) |
3dab1dad | 1838 | ); |
8e11feef RGS |
1839 | } |
1840 | } | |
1841 | TRIE_BITMAP_SET(trie,*ch); | |
1842 | if ( folder ) | |
1843 | TRIE_BITMAP_SET(trie,folder[ *ch ]); | |
1844 | DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"%s", ch)); | |
1845 | } | |
1846 | idx = ofs; | |
1847 | } | |
3dab1dad YO |
1848 | } |
1849 | if ( count == 1 ) { | |
1850 | SV **tmp = av_fetch( TRIE_REVCHARMAP(trie), idx, 0); | |
8e11feef | 1851 | const char *ch = SvPV_nolen_const( *tmp ); |
3dab1dad | 1852 | DEBUG_OPTIMISE_r( |
8e11feef RGS |
1853 | PerlIO_printf( Perl_debug_log, |
1854 | "%*sPrefix State: %"UVuf" Idx:%"UVuf" Char='%s'\n", | |
1855 | (int)depth * 2 + 2, "", | |
786e8c11 | 1856 | (UV)state, (UV)idx, ch) |
3dab1dad YO |
1857 | ); |
1858 | if ( state==1 ) { | |
1859 | OP( convert ) = nodetype; | |
1860 | str=STRING(convert); | |
1861 | STR_LEN(convert)=0; | |
1862 | } | |
1863 | *str++=*ch; | |
1864 | STR_LEN(convert)++; | |
a3621e74 | 1865 | |
8e11feef | 1866 | } else { |
f9049ba1 | 1867 | #ifdef DEBUGGING |
8e11feef RGS |
1868 | if (state>1) |
1869 | DEBUG_OPTIMISE_r(PerlIO_printf( Perl_debug_log,"]\n")); | |
f9049ba1 | 1870 | #endif |
8e11feef RGS |
1871 | break; |
1872 | } | |
1873 | } | |
3dab1dad | 1874 | if (str) { |
8e11feef | 1875 | regnode *n = convert+NODE_SZ_STR(convert); |
07be1b83 | 1876 | NEXT_OFF(convert) = NODE_SZ_STR(convert); |
8e11feef | 1877 | trie->startstate = state; |
07be1b83 YO |
1878 | trie->minlen -= (state - 1); |
1879 | trie->maxlen -= (state - 1); | |
1880 | DEBUG_r({ | |
1881 | regnode *fix = convert; | |
1882 | mjd_nodelen++; | |
1883 | Set_Node_Offset_Length(convert, mjd_offset, state - 1); | |
1884 | while( ++fix < n ) { | |
1885 | Set_Node_Offset_Length(fix, 0, 0); | |
1886 | } | |
1887 | }); | |
8e11feef RGS |
1888 | if (trie->maxlen) { |
1889 | convert = n; | |
1890 | } else { | |
3dab1dad YO |
1891 | NEXT_OFF(convert) = (U16)(tail - convert); |
1892 | } | |
1893 | } | |
1894 | } | |
1895 | if ( trie->maxlen ) { | |
8e11feef RGS |
1896 | NEXT_OFF( convert ) = (U16)(tail - convert); |
1897 | ARG_SET( convert, data_slot ); | |
786e8c11 YO |
1898 | /* Store the offset to the first unabsorbed branch in |
1899 | jump[0], which is otherwise unused by the jump logic. | |
1900 | We use this when dumping a trie and during optimisation. */ | |
1901 | if (trie->jump) | |
1902 | trie->jump[0] = (U16)(tail - nextbranch); | |
1903 | if (!jumper) | |
85c3142d | 1904 | jumper = last; |
786e8c11 YO |
1905 | /* XXXX */ |
1906 | if ( !trie->states[trie->startstate].wordnum && trie->bitmap && | |
1de06328 | 1907 | ( (char *)jumper - (char *)convert) >= (int)sizeof(struct regnode_charclass) ) |
786e8c11 YO |
1908 | { |
1909 | OP( convert ) = TRIEC; | |
1910 | Copy(trie->bitmap, ((struct regnode_charclass *)convert)->bitmap, ANYOF_BITMAP_SIZE, char); | |
1911 | Safefree(trie->bitmap); | |
1912 | trie->bitmap= NULL; | |
1913 | } else | |
1914 | OP( convert ) = TRIE; | |
a3621e74 | 1915 | |
3dab1dad YO |
1916 | /* store the type in the flags */ |
1917 | convert->flags = nodetype; | |
1918 | /* XXX We really should free up the resource in trie now, as we wont use them */ | |
1919 | } | |
a3621e74 YO |
1920 | /* needed for dumping*/ |
1921 | DEBUG_r({ | |
786e8c11 YO |
1922 | regnode *optimize = convert |
1923 | + NODE_STEP_REGNODE | |
1924 | + regarglen[ OP( convert ) ]; | |
07be1b83 YO |
1925 | regnode *opt = convert; |
1926 | while (++opt<optimize) { | |
1927 | Set_Node_Offset_Length(opt,0,0); | |
1928 | } | |
786e8c11 YO |
1929 | /* |
1930 | Try to clean up some of the debris left after the | |
1931 | optimisation. | |
a3621e74 | 1932 | */ |
786e8c11 | 1933 | while( optimize < jumper ) { |
07be1b83 | 1934 | mjd_nodelen += Node_Length((optimize)); |
a3621e74 | 1935 | OP( optimize ) = OPTIMIZED; |
07be1b83 | 1936 | Set_Node_Offset_Length(optimize,0,0); |
a3621e74 YO |
1937 | optimize++; |
1938 | } | |
07be1b83 | 1939 | Set_Node_Offset_Length(convert,mjd_offset,mjd_nodelen); |
a3621e74 YO |
1940 | }); |
1941 | } /* end node insert */ | |
07be1b83 | 1942 | #ifndef DEBUGGING |
6e8b4190 | 1943 | SvREFCNT_dec(TRIE_REVCHARMAP(trie)); |
07be1b83 | 1944 | #endif |
786e8c11 YO |
1945 | return trie->jump |
1946 | ? MADE_JUMP_TRIE | |
1947 | : trie->startstate>1 | |
1948 | ? MADE_EXACT_TRIE | |
1949 | : MADE_TRIE; | |
1950 | } | |
1951 | ||
1952 | STATIC void | |
1953 | S_make_trie_failtable(pTHX_ RExC_state_t *pRExC_state, regnode *source, regnode *stclass, U32 depth) | |
1954 | { | |
1955 | /* The Trie is constructed and compressed now so we can build a fail array now if its needed | |
1956 | ||
1957 | This is basically the Aho-Corasick algorithm. Its from exercise 3.31 and 3.32 in the | |
1958 | "Red Dragon" -- Compilers, principles, techniques, and tools. Aho, Sethi, Ullman 1985/88 | |
1959 | ISBN 0-201-10088-6 | |
1960 | ||
1961 | We find the fail state for each state in the trie, this state is the longest proper | |
1962 | suffix of the current states 'word' that is also a proper prefix of another word in our | |
1963 | trie. State 1 represents the word '' and is the thus the default fail state. This allows | |
1964 | the DFA not to have to restart after its tried and failed a word at a given point, it | |
1965 | simply continues as though it had been matching the other word in the first place. | |
1966 | Consider | |
1967 | 'abcdgu'=~/abcdefg|cdgu/ | |
1968 | When we get to 'd' we are still matching the first word, we would encounter 'g' which would | |
1969 | fail, which would bring use to the state representing 'd' in the second word where we would | |
1970 | try 'g' and succeed, prodceding to match 'cdgu'. | |
1971 | */ | |
1972 | /* add a fail transition */ | |
1973 | reg_trie_data *trie=(reg_trie_data *)RExC_rx->data->data[ARG(source)]; | |
1974 | U32 *q; | |
1975 | const U32 ucharcount = trie->uniquecharcount; | |
1976 | const U32 numstates = trie->laststate; | |
1977 | const U32 ubound = trie->lasttrans + ucharcount; | |
1978 | U32 q_read = 0; | |
1979 | U32 q_write = 0; | |
1980 | U32 charid; | |
1981 | U32 base = trie->states[ 1 ].trans.base; | |
1982 | U32 *fail; | |
1983 | reg_ac_data *aho; | |
1984 | const U32 data_slot = add_data( pRExC_state, 1, "T" ); | |
1985 | GET_RE_DEBUG_FLAGS_DECL; | |
1986 | #ifndef DEBUGGING | |
1987 | PERL_UNUSED_ARG(depth); | |
1988 | #endif | |
1989 | ||
1990 | ||
1991 | ARG_SET( stclass, data_slot ); | |
1992 | Newxz( aho, 1, reg_ac_data ); | |
1993 | RExC_rx->data->data[ data_slot ] = (void*)aho; | |
1994 | aho->trie=trie; | |
1995 | aho->states=(reg_trie_state *)savepvn((const char*)trie->states, | |
1996 | (trie->laststate+1)*sizeof(reg_trie_state)); | |
1997 | Newxz( q, numstates, U32); | |
1998 | Newxz( aho->fail, numstates, U32 ); | |
1999 | aho->refcount = 1; | |
2000 | fail = aho->fail; | |
2001 | /* initialize fail[0..1] to be 1 so that we always have | |
2002 | a valid final fail state */ | |
2003 | fail[ 0 ] = fail[ 1 ] = 1; | |
2004 | ||
2005 | for ( charid = 0; charid < ucharcount ; charid++ ) { | |
2006 | const U32 newstate = TRIE_TRANS_STATE( 1, base, ucharcount, charid, 0 ); | |
2007 | if ( newstate ) { | |
2008 | q[ q_write ] = newstate; | |
2009 | /* set to point at the root */ | |
2010 | fail[ q[ q_write++ ] ]=1; | |
2011 | } | |
2012 | } | |
2013 | while ( q_read < q_write) { | |
2014 | const U32 cur = q[ q_read++ % numstates ]; | |
2015 | base = trie->states[ cur ].trans.base; | |
2016 | ||
2017 | for ( charid = 0 ; charid < ucharcount ; charid++ ) { | |
2018 | const U32 ch_state = TRIE_TRANS_STATE( cur, base, ucharcount, charid, 1 ); | |
2019 | if (ch_state) { | |
2020 | U32 fail_state = cur; | |
2021 | U32 fail_base; | |
2022 | do { | |
2023 | fail_state = fail[ fail_state ]; | |
2024 | fail_base = aho->states[ fail_state ].trans.base; | |
2025 | } while ( !TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ) ); | |
2026 | ||
2027 | fail_state = TRIE_TRANS_STATE( fail_state, fail_base, ucharcount, charid, 1 ); | |
2028 | fail[ ch_state ] = fail_state; | |
2029 | if ( !aho->states[ ch_state ].wordnum && aho->states[ fail_state ].wordnum ) | |
2030 | { | |
2031 | aho->states[ ch_state ].wordnum = aho->states[ fail_state ].wordnum; | |
2032 | } | |
2033 | q[ q_write++ % numstates] = ch_state; | |
2034 | } | |
2035 | } | |
2036 | } | |
2037 | /* restore fail[0..1] to 0 so that we "fall out" of the AC loop | |
2038 | when we fail in state 1, this allows us to use the | |
2039 | charclass scan to find a valid start char. This is based on the principle | |
2040 | that theres a good chance the string being searched contains lots of stuff | |
2041 | that cant be a start char. | |
2042 | */ | |
2043 | fail[ 0 ] = fail[ 1 ] = 0; | |
2044 | DEBUG_TRIE_COMPILE_r({ | |
2045 | PerlIO_printf(Perl_debug_log, "%*sStclass Failtable: 0", (int)(depth * 2), ""); | |
2046 | for( q_read=1; q_read<numstates; q_read++ ) { | |
2047 | PerlIO_printf(Perl_debug_log, ", %"UVuf, (UV)fail[q_read]); | |
2048 | } | |
2049 | PerlIO_printf(Perl_debug_log, "\n"); | |
2050 | }); | |
2051 | Safefree(q); | |
2052 | /*RExC_seen |= REG_SEEN_TRIEDFA;*/ | |
a3621e74 YO |
2053 | } |
2054 | ||
786e8c11 | 2055 | |
a3621e74 | 2056 | /* |
5d1c421c JH |
2057 | * There are strange code-generation bugs caused on sparc64 by gcc-2.95.2. |
2058 | * These need to be revisited when a newer toolchain becomes available. | |
2059 | */ | |
2060 | #if defined(__sparc64__) && defined(__GNUC__) | |
2061 | # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96) | |
2062 | # undef SPARC64_GCC_WORKAROUND | |
2063 | # define SPARC64_GCC_WORKAROUND 1 | |
2064 | # endif | |
2065 | #endif | |
2066 | ||
07be1b83 YO |
2067 | #define DEBUG_PEEP(str,scan,depth) \ |
2068 | DEBUG_OPTIMISE_r({ \ | |
2069 | SV * const mysv=sv_newmortal(); \ | |
2070 | regnode *Next = regnext(scan); \ | |
2071 | regprop(RExC_rx, mysv, scan); \ | |
2072 | PerlIO_printf(Perl_debug_log, "%*s" str ">%3d: %s [%d]\n", \ | |
2073 | (int)depth*2, "", REG_NODE_NUM(scan), SvPV_nolen_const(mysv),\ | |
2074 | Next ? (REG_NODE_NUM(Next)) : 0 ); \ | |
2075 | }); | |
2076 | ||
1de06328 YO |
2077 | |
2078 | ||
2079 | ||
2080 | ||
07be1b83 YO |
2081 | #define JOIN_EXACT(scan,min,flags) \ |
2082 | if (PL_regkind[OP(scan)] == EXACT) \ | |
2083 | join_exact(pRExC_state,(scan),(min),(flags),NULL,depth+1) | |
2084 | ||
be8e71aa | 2085 | STATIC U32 |
07be1b83 YO |
2086 | S_join_exact(pTHX_ RExC_state_t *pRExC_state, regnode *scan, I32 *min, U32 flags,regnode *val, U32 depth) { |
2087 | /* Merge several consecutive EXACTish nodes into one. */ | |
2088 | regnode *n = regnext(scan); | |
2089 | U32 stringok = 1; | |
2090 | regnode *next = scan + NODE_SZ_STR(scan); | |
2091 | U32 merged = 0; | |
2092 | U32 stopnow = 0; | |
2093 | #ifdef DEBUGGING | |
2094 | regnode *stop = scan; | |
72f13be8 | 2095 | GET_RE_DEBUG_FLAGS_DECL; |
f9049ba1 | 2096 | #else |
d47053eb RGS |
2097 | PERL_UNUSED_ARG(depth); |
2098 | #endif | |
2099 | #ifndef EXPERIMENTAL_INPLACESCAN | |
f9049ba1 SP |
2100 | PERL_UNUSED_ARG(flags); |
2101 | PERL_UNUSED_ARG(val); | |
07be1b83 | 2102 | #endif |
07be1b83 YO |
2103 | DEBUG_PEEP("join",scan,depth); |
2104 | ||
2105 | /* Skip NOTHING, merge EXACT*. */ | |
2106 | while (n && | |
2107 | ( PL_regkind[OP(n)] == NOTHING || | |
2108 | (stringok && (OP(n) == OP(scan)))) | |
2109 | && NEXT_OFF(n) | |
2110 | && NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) { | |
2111 | ||
2112 | if (OP(n) == TAIL || n > next) | |
2113 | stringok = 0; | |
2114 | if (PL_regkind[OP(n)] == NOTHING) { | |
07be1b83 YO |
2115 | DEBUG_PEEP("skip:",n,depth); |
2116 | NEXT_OFF(scan) += NEXT_OFF(n); | |
2117 | next = n + NODE_STEP_REGNODE; | |
2118 | #ifdef DEBUGGING | |
2119 | if (stringok) | |
2120 | stop = n; | |
2121 | #endif | |
2122 | n = regnext(n); | |
2123 | } | |
2124 | else if (stringok) { | |
786e8c11 | 2125 | const unsigned int oldl = STR_LEN(scan); |
07be1b83 YO |
2126 | regnode * const nnext = regnext(n); |
2127 | ||
2128 | DEBUG_PEEP("merg",n,depth); | |
2129 | ||
2130 | merged++; | |
2131 | if (oldl + STR_LEN(n) > U8_MAX) | |
2132 | break; | |
2133 | NEXT_OFF(scan) += NEXT_OFF(n); | |
2134 | STR_LEN(scan) += STR_LEN(n); | |
2135 | next = n + NODE_SZ_STR(n); | |
2136 | /* Now we can overwrite *n : */ | |
2137 | Move(STRING(n), STRING(scan) + oldl, STR_LEN(n), char); | |
2138 | #ifdef DEBUGGING | |
2139 | stop = next - 1; | |
2140 | #endif | |
2141 | n = nnext; | |
2142 | if (stopnow) break; | |
2143 | } | |
2144 | ||
d47053eb RGS |
2145 | #ifdef EXPERIMENTAL_INPLACESCAN |
2146 | if (flags && !NEXT_OFF(n)) { | |
2147 | DEBUG_PEEP("atch", val, depth); | |
2148 | if (reg_off_by_arg[OP(n)]) { | |
2149 | ARG_SET(n, val - n); | |
2150 | } | |
2151 | else { | |
2152 | NEXT_OFF(n) = val - n; | |
2153 | } | |
2154 | stopnow = 1; | |
2155 | } | |
07be1b83 YO |
2156 | #endif |
2157 | } | |
2158 | ||
2159 | if (UTF && ( OP(scan) == EXACTF ) && ( STR_LEN(scan) >= 6 ) ) { | |
2160 | /* | |
2161 | Two problematic code points in Unicode casefolding of EXACT nodes: | |
2162 | ||
2163 | U+0390 - GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS | |
2164 | U+03B0 - GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND TONOS | |
2165 | ||
2166 | which casefold to | |
2167 | ||
2168 | Unicode UTF-8 | |
2169 | ||
2170 | U+03B9 U+0308 U+0301 0xCE 0xB9 0xCC 0x88 0xCC 0x81 | |
2171 | U+03C5 U+0308 U+0301 0xCF 0x85 0xCC 0x88 0xCC 0x81 | |
2172 | ||
2173 | This means that in case-insensitive matching (or "loose matching", | |
2174 | as Unicode calls it), an EXACTF of length six (the UTF-8 encoded byte | |
2175 | length of the above casefolded versions) can match a target string | |
2176 | of length two (the byte length of UTF-8 encoded U+0390 or U+03B0). | |
2177 | This would rather mess up the minimum length computation. | |
2178 | ||
2179 | What we'll do is to look for the tail four bytes, and then peek | |
2180 | at the preceding two bytes to see whether we need to decrease | |
2181 | the minimum length by four (six minus two). | |
2182 | ||
2183 | Thanks to the design of UTF-8, there cannot be false matches: | |
2184 | A sequence of valid UTF-8 bytes cannot be a subsequence of | |
2185 | another valid sequence of UTF-8 bytes. | |
2186 | ||
2187 | */ | |
2188 | char * const s0 = STRING(scan), *s, *t; | |
2189 | char * const s1 = s0 + STR_LEN(scan) - 1; | |
2190 | char * const s2 = s1 - 4; | |
e294cc5d JH |
2191 | #ifdef EBCDIC /* RD tunifold greek 0390 and 03B0 */ |
2192 | const char t0[] = "\xaf\x49\xaf\x42"; | |
2193 | #else | |
07be1b83 | 2194 | const char t0[] = "\xcc\x88\xcc\x81"; |
e294cc5d | 2195 | #endif |
07be1b83 YO |
2196 | const char * const t1 = t0 + 3; |
2197 | ||
2198 | for (s = s0 + 2; | |
2199 | s < s2 && (t = ninstr(s, s1, t0, t1)); | |
2200 | s = t + 4) { | |
e294cc5d JH |
2201 | #ifdef EBCDIC |
2202 | if (((U8)t[-1] == 0x68 && (U8)t[-2] == 0xB4) || | |
2203 | ((U8)t[-1] == 0x46 && (U8)t[-2] == 0xB5)) | |
2204 | #else | |
07be1b83 YO |
2205 | if (((U8)t[-1] == 0xB9 && (U8)t[-2] == 0xCE) || |
2206 | ((U8)t[-1] == 0x85 && (U8)t[-2] == 0xCF)) | |
e294cc5d | 2207 | #endif |
07be1b83 YO |
2208 | *min -= 4; |
2209 | } | |
2210 | } | |
2211 | ||
2212 | #ifdef DEBUGGING | |
2213 | /* Allow dumping */ | |
2214 | n = scan + NODE_SZ_STR(scan); | |
2215 | while (n <= stop) { | |
2216 | if (PL_regkind[OP(n)] != NOTHING || OP(n) == NOTHING) { | |
2217 | OP(n) = OPTIMIZED; | |
2218 | NEXT_OFF(n) = 0; | |
2219 | } | |
2220 | n++; | |
2221 | } | |
2222 | #endif | |
2223 | DEBUG_OPTIMISE_r(if (merged){DEBUG_PEEP("finl",scan,depth)}); | |
2224 | return stopnow; | |
2225 | } | |
2226 | ||
653099ff GS |
2227 | /* REx optimizer. Converts nodes into quickier variants "in place". |
2228 | Finds fixed substrings. */ | |
2229 | ||
a0288114 | 2230 | /* Stops at toplevel WHILEM as well as at "last". At end *scanp is set |
c277df42 IZ |
2231 | to the position after last scanned or to NULL. */ |
2232 | ||
07be1b83 YO |
2233 | |
2234 | ||
76e3520e | 2235 | STATIC I32 |
1de06328 YO |
2236 | S_study_chunk(pTHX_ RExC_state_t *pRExC_state, regnode **scanp, |
2237 | I32 *minlenp, I32 *deltap, | |
9a957fbc | 2238 | regnode *last, scan_data_t *data, U32 flags, U32 depth) |
c277df42 IZ |
2239 | /* scanp: Start here (read-write). */ |
2240 | /* deltap: Write maxlen-minlen here. */ | |
2241 | /* last: Stop before this one. */ | |
2242 | { | |
97aff369 | 2243 | dVAR; |
c277df42 IZ |
2244 | I32 min = 0, pars = 0, code; |
2245 | regnode *scan = *scanp, *next; | |
2246 | I32 delta = 0; | |
2247 | int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF); | |
aca2d497 | 2248 | int is_inf_internal = 0; /* The studied chunk is infinite */ |
c277df42 IZ |
2249 | I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0; |
2250 | scan_data_t data_fake; | |
653099ff | 2251 | struct regnode_charclass_class and_with; /* Valid if flags & SCF_DO_STCLASS_OR */ |
a3621e74 | 2252 | SV *re_trie_maxbuff = NULL; |
786e8c11 YO |
2253 | regnode *first_non_open = scan; |
2254 | ||
a3621e74 YO |
2255 | |
2256 | GET_RE_DEBUG_FLAGS_DECL; | |
13a24bad YO |
2257 | #ifdef DEBUGGING |
2258 | StructCopy(&zero_scan_data, &data_fake, scan_data_t); | |
2259 | #endif | |
786e8c11 YO |
2260 | if ( depth == 0 ) { |
2261 | while (first_non_open && OP(first_non_open) == OPEN) | |
2262 | first_non_open=regnext(first_non_open); | |
2263 | } | |
2264 | ||
b81d288d | 2265 | |
c277df42 IZ |
2266 | while (scan && OP(scan) != END && scan < last) { |
2267 | /* Peephole optimizer: */ | |
1de06328 | 2268 | DEBUG_STUDYDATA(data,depth); |
07be1b83 | 2269 | DEBUG_PEEP("Peep",scan,depth); |
07be1b83 | 2270 | JOIN_EXACT(scan,&min,0); |
a3621e74 | 2271 | |
653099ff GS |
2272 | /* Follow the next-chain of the current node and optimize |
2273 | away all the NOTHINGs from it. */ | |
c277df42 | 2274 | if (OP(scan) != CURLYX) { |
a3b680e6 | 2275 | const int max = (reg_off_by_arg[OP(scan)] |
048cfca1 GS |
2276 | ? I32_MAX |
2277 | /* I32 may be smaller than U16 on CRAYs! */ | |
2278 | : (I32_MAX < U16_MAX ? I32_MAX : U16_MAX)); | |
c277df42 IZ |
2279 | int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan)); |
2280 | int noff; | |
2281 | regnode *n = scan; | |
b81d288d | 2282 | |
c277df42 IZ |
2283 | /* Skip NOTHING and LONGJMP. */ |
2284 | while ((n = regnext(n)) | |
3dab1dad | 2285 | && ((PL_regkind[OP(n)] == NOTHING && (noff = NEXT_OFF(n))) |
c277df42 IZ |
2286 | || ((OP(n) == LONGJMP) && (noff = ARG(n)))) |
2287 | && off + noff < max) | |
2288 | off += noff; | |
2289 | if (reg_off_by_arg[OP(scan)]) | |
2290 | ARG(scan) = off; | |
b81d288d | 2291 | else |
c277df42 IZ |
2292 | NEXT_OFF(scan) = off; |
2293 | } | |
a3621e74 | 2294 | |
07be1b83 | 2295 | |
3dab1dad | 2296 | |
653099ff GS |
2297 | /* The principal pseudo-switch. Cannot be a switch, since we |
2298 | look into several different things. */ | |
b81d288d | 2299 | if (OP(scan) == BRANCH || OP(scan) == BRANCHJ |
c277df42 IZ |
2300 | || OP(scan) == IFTHEN || OP(scan) == SUSPEND) { |
2301 | next = regnext(scan); | |
2302 | code = OP(scan); | |
a3621e74 | 2303 | /* demq: the op(next)==code check is to see if we have "branch-branch" AFAICT */ |
b81d288d AB |
2304 | |
2305 | if (OP(next) == code || code == IFTHEN || code == SUSPEND) { | |
786e8c11 YO |
2306 | /* NOTE - There is similar code to this block below for handling |
2307 | TRIE nodes on a re-study. If you change stuff here check there | |
2308 | too. */ | |
c277df42 | 2309 | I32 max1 = 0, min1 = I32_MAX, num = 0; |
653099ff | 2310 | struct regnode_charclass_class accum; |
d4c19fe8 | 2311 | regnode * const startbranch=scan; |
c277df42 | 2312 | |
653099ff | 2313 | if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */ |
1de06328 | 2314 | scan_commit(pRExC_state, data, minlenp); /* Cannot merge strings after this. */ |
653099ff | 2315 | if (flags & SCF_DO_STCLASS) |
830247a4 | 2316 | cl_init_zero(pRExC_state, &accum); |
a3621e74 | 2317 | |
c277df42 | 2318 | while (OP(scan) == code) { |
830247a4 | 2319 | I32 deltanext, minnext, f = 0, fake; |
653099ff | 2320 | struct regnode_charclass_class this_class; |
c277df42 IZ |
2321 | |
2322 | num++; | |
2323 | data_fake.flags = 0; | |
b81d288d | 2324 | if (data) { |
2c2d71f5 | 2325 | data_fake.whilem_c = data->whilem_c; |
cb434fcc IZ |
2326 | data_fake.last_closep = data->last_closep; |
2327 | } | |
2328 | else | |
2329 | data_fake.last_closep = &fake; | |
c277df42 IZ |
2330 | next = regnext(scan); |
2331 | scan = NEXTOPER(scan); | |
2332 | if (code != BRANCH) | |
2333 | scan = NEXTOPER(scan); | |
653099ff | 2334 | if (flags & SCF_DO_STCLASS) { |
830247a4 | 2335 | cl_init(pRExC_state, &this_class); |
653099ff GS |
2336 | data_fake.start_class = &this_class; |
2337 | f = SCF_DO_STCLASS_AND; | |
b81d288d | 2338 | } |
e1901655 IZ |
2339 | if (flags & SCF_WHILEM_VISITED_POS) |
2340 | f |= SCF_WHILEM_VISITED_POS; | |
a3621e74 | 2341 | |
653099ff | 2342 | /* we suppose the run is continuous, last=next...*/ |
1de06328 | 2343 | minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext, |
a3621e74 | 2344 | next, &data_fake, f,depth+1); |
b81d288d | 2345 | if (min1 > minnext) |
c277df42 IZ |
2346 | min1 = minnext; |
2347 | if (max1 < minnext + deltanext) | |
2348 | max1 = minnext + deltanext; | |
2349 | if (deltanext == I32_MAX) | |
aca2d497 | 2350 | is_inf = is_inf_internal = 1; |
c277df42 IZ |
2351 | scan = next; |
2352 | if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) | |
2353 | pars++; | |
3dab1dad YO |
2354 | if (data) { |
2355 | if (data_fake.flags & SF_HAS_EVAL) | |
07be1b83 | 2356 | data->flags |= SF_HAS_EVAL; |
2c2d71f5 | 2357 | data->whilem_c = data_fake.whilem_c; |
3dab1dad | 2358 | } |
653099ff | 2359 | if (flags & SCF_DO_STCLASS) |
830247a4 | 2360 | cl_or(pRExC_state, &accum, &this_class); |
b81d288d | 2361 | if (code == SUSPEND) |
c277df42 IZ |
2362 | break; |
2363 | } | |
2364 | if (code == IFTHEN && num < 2) /* Empty ELSE branch */ | |
2365 | min1 = 0; | |
2366 | if (flags & SCF_DO_SUBSTR) { | |
2367 | data->pos_min += min1; | |
2368 | data->pos_delta += max1 - min1; | |
2369 | if (max1 != min1 || is_inf) | |
2370 | data->longest = &(data->longest_float); | |
2371 | } | |
2372 | min += min1; | |
2373 | delta += max1 - min1; | |
653099ff | 2374 | if (flags & SCF_DO_STCLASS_OR) { |
830247a4 | 2375 | cl_or(pRExC_state, data->start_class, &accum); |
653099ff GS |
2376 | if (min1) { |
2377 | cl_and(data->start_class, &and_with); | |
2378 | flags &= ~SCF_DO_STCLASS; | |
2379 | } | |
2380 | } | |
2381 | else if (flags & SCF_DO_STCLASS_AND) { | |
de0c8cb8 GS |
2382 | if (min1) { |
2383 | cl_and(data->start_class, &accum); | |
653099ff | 2384 | flags &= ~SCF_DO_STCLASS; |
de0c8cb8 GS |
2385 | } |
2386 | else { | |
b81d288d | 2387 | /* Switch to OR mode: cache the old value of |
de0c8cb8 GS |
2388 | * data->start_class */ |
2389 | StructCopy(data->start_class, &and_with, | |
2390 | struct regnode_charclass_class); | |
2391 | flags &= ~SCF_DO_STCLASS_AND; | |
2392 | StructCopy(&accum, data->start_class, | |
2393 | struct regnode_charclass_class); | |
2394 | flags |= SCF_DO_STCLASS_OR; | |
2395 | data->start_class->flags |= ANYOF_EOS; | |
2396 | } | |
653099ff | 2397 | } |
a3621e74 | 2398 | |
786e8c11 | 2399 | if (PERL_ENABLE_TRIE_OPTIMISATION && OP( startbranch ) == BRANCH ) { |
a3621e74 YO |
2400 | /* demq. |
2401 | ||
2402 | Assuming this was/is a branch we are dealing with: 'scan' now | |
2403 | points at the item that follows the branch sequence, whatever | |
2404 | it is. We now start at the beginning of the sequence and look | |
2405 | for subsequences of | |
2406 | ||
786e8c11 YO |
2407 | BRANCH->EXACT=>x1 |
2408 | BRANCH->EXACT=>x2 | |
2409 | tail | |
a3621e74 YO |
2410 | |
2411 | which would be constructed from a pattern like /A|LIST|OF|WORDS/ | |
2412 | ||
2413 | If we can find such a subseqence we need to turn the first | |
2414 | element into a trie and then add the subsequent branch exact | |
2415 | strings to the trie. | |
2416 | ||
2417 | We have two cases | |
2418 | ||
786e8c11 | 2419 | 1. patterns where the whole set of branch can be converted. |
a3621e74 | 2420 | |
786e8c11 | 2421 | 2. patterns where only a subset can be converted. |
a3621e74 YO |
2422 | |
2423 | In case 1 we can replace the whole set with a single regop | |
2424 | for the trie. In case 2 we need to keep the start and end | |
2425 | branchs so | |
2426 | ||
2427 | 'BRANCH EXACT; BRANCH EXACT; BRANCH X' | |
2428 | becomes BRANCH TRIE; BRANCH X; | |
2429 | ||
786e8c11 YO |
2430 | There is an additional case, that being where there is a |
2431 | common prefix, which gets split out into an EXACT like node | |
2432 | preceding the TRIE node. | |
2433 | ||
2434 | If x(1..n)==tail then we can do a simple trie, if not we make | |
2435 | a "jump" trie, such that when we match the appropriate word | |
2436 | we "jump" to the appopriate tail node. Essentailly we turn | |
2437 | a nested if into a case structure of sorts. | |
a3621e74 YO |
2438 | |
2439 | */ | |
786e8c11 | 2440 | |
3dab1dad | 2441 | int made=0; |
0111c4fd RGS |
2442 | if (!re_trie_maxbuff) { |
2443 | re_trie_maxbuff = get_sv(RE_TRIE_MAXBUF_NAME, 1); | |
2444 | if (!SvIOK(re_trie_maxbuff)) | |
2445 | sv_setiv(re_trie_maxbuff, RE_TRIE_MAXBUF_INIT); | |
2446 | } | |
786e8c11 | 2447 | if ( SvIV(re_trie_maxbuff)>=0 ) { |
a3621e74 YO |
2448 | regnode *cur; |
2449 | regnode *first = (regnode *)NULL; | |
2450 | regnode *last = (regnode *)NULL; | |
2451 | regnode *tail = scan; | |
2452 | U8 optype = 0; | |
2453 | U32 count=0; | |
2454 | ||
2455 | #ifdef DEBUGGING | |
c445ea15 | 2456 | SV * const mysv = sv_newmortal(); /* for dumping */ |
a3621e74 YO |
2457 | #endif |
2458 | /* var tail is used because there may be a TAIL | |
2459 | regop in the way. Ie, the exacts will point to the | |
2460 | thing following the TAIL, but the last branch will | |
2461 | point at the TAIL. So we advance tail. If we | |
2462 | have nested (?:) we may have to move through several | |
2463 | tails. | |
2464 | */ | |
2465 | ||
2466 | while ( OP( tail ) == TAIL ) { | |
2467 | /* this is the TAIL generated by (?:) */ | |
2468 | tail = regnext( tail ); | |
2469 | } | |
2470 | ||
3dab1dad | 2471 | |
a3621e74 | 2472 | DEBUG_OPTIMISE_r({ |
32fc9b6a | 2473 | regprop(RExC_rx, mysv, tail ); |
3dab1dad YO |
2474 | PerlIO_printf( Perl_debug_log, "%*s%s%s\n", |
2475 | (int)depth * 2 + 2, "", | |
2476 | "Looking for TRIE'able sequences. Tail node is: ", | |
2477 | SvPV_nolen_const( mysv ) | |
a3621e74 YO |
2478 | ); |
2479 | }); | |
3dab1dad | 2480 | |
a3621e74 YO |
2481 | /* |
2482 | ||
2483 | step through the branches, cur represents each | |
2484 | branch, noper is the first thing to be matched | |
2485 | as part of that branch and noper_next is the | |
2486 | regnext() of that node. if noper is an EXACT | |
2487 | and noper_next is the same as scan (our current | |
2488 | position in the regex) then the EXACT branch is | |
2489 | a possible optimization target. Once we have | |
2490 | two or more consequetive such branches we can | |
2491 | create a trie of the EXACT's contents and stich | |
2492 | it in place. If the sequence represents all of | |
2493 | the branches we eliminate the whole thing and | |
2494 | replace it with a single TRIE. If it is a | |
2495 | subsequence then we need to stitch it in. This | |
2496 | means the first branch has to remain, and needs | |
2497 | to be repointed at the item on the branch chain | |
2498 | following the last branch optimized. This could | |
2499 | be either a BRANCH, in which case the | |
2500 | subsequence is internal, or it could be the | |
2501 | item following the branch sequence in which | |
2502 | case the subsequence is at the end. | |
2503 | ||
2504 | */ | |
2505 | ||
2506 | /* dont use tail as the end marker for this traverse */ | |
2507 | for ( cur = startbranch ; cur != scan ; cur = regnext( cur ) ) { | |
aec46f14 | 2508 | regnode * const noper = NEXTOPER( cur ); |
be981c67 | 2509 | #if defined(DEBUGGING) || defined(NOJUMPTRIE) |
aec46f14 | 2510 | regnode * const noper_next = regnext( noper ); |
be981c67 | 2511 | #endif |
a3621e74 | 2512 | |
a3621e74 | 2513 | DEBUG_OPTIMISE_r({ |
32fc9b6a | 2514 | regprop(RExC_rx, mysv, cur); |
3dab1dad YO |
2515 | PerlIO_printf( Perl_debug_log, "%*s- %s (%d)", |
2516 | (int)depth * 2 + 2,"", SvPV_nolen_const( mysv ), REG_NODE_NUM(cur) ); | |
a3621e74 | 2517 | |
32fc9b6a | 2518 | regprop(RExC_rx, mysv, noper); |
a3621e74 | 2519 | PerlIO_printf( Perl_debug_log, " -> %s", |
cfd0369c | 2520 | SvPV_nolen_const(mysv)); |
a3621e74 YO |
2521 | |
2522 | if ( noper_next ) { | |
32fc9b6a | 2523 | regprop(RExC_rx, mysv, noper_next ); |
a3621e74 | 2524 | PerlIO_printf( Perl_debug_log,"\t=> %s\t", |
cfd0369c | 2525 | SvPV_nolen_const(mysv)); |
a3621e74 | 2526 | } |
3dab1dad YO |
2527 | PerlIO_printf( Perl_debug_log, "(First==%d,Last==%d,Cur==%d)\n", |
2528 | REG_NODE_NUM(first), REG_NODE_NUM(last), REG_NODE_NUM(cur) ); | |
a3621e74 | 2529 | }); |
3dab1dad YO |
2530 | if ( (((first && optype!=NOTHING) ? OP( noper ) == optype |
2531 | : PL_regkind[ OP( noper ) ] == EXACT ) | |
2532 | || OP(noper) == NOTHING ) | |
786e8c11 YO |
2533 | #ifdef NOJUMPTRIE |
2534 | && noper_next == tail | |
2535 | #endif | |
2536 | && count < U16_MAX) | |
a3621e74 YO |
2537 | { |
2538 | count++; | |
3dab1dad YO |
2539 | if ( !first || optype == NOTHING ) { |
2540 | if (!first) first = cur; | |
a3621e74 YO |
2541 | optype = OP( noper ); |
2542 | } else { | |
a3621e74 | 2543 | last = cur; |
a3621e74 YO |
2544 | } |
2545 | } else { | |
2546 | if ( last ) { | |
786e8c11 YO |
2547 | make_trie( pRExC_state, |
2548 | startbranch, first, cur, tail, count, | |
2549 | optype, depth+1 ); | |
a3621e74 | 2550 | } |
3dab1dad | 2551 | if ( PL_regkind[ OP( noper ) ] == EXACT |
786e8c11 YO |
2552 | #ifdef NOJUMPTRIE |
2553 | && noper_next == tail | |
2554 | #endif | |
2555 | ){ | |
a3621e74 YO |
2556 | count = 1; |
2557 | first = cur; | |
2558 | optype = OP( noper ); | |
2559 | } else { | |
2560 | count = 0; | |
2561 | first = NULL; | |
2562 | optype = 0; | |
2563 | } | |
2564 | last = NULL; | |
2565 | } | |
2566 | } | |
2567 | DEBUG_OPTIMISE_r({ | |
32fc9b6a | 2568 | regprop(RExC_rx, mysv, cur); |
a3621e74 | 2569 | PerlIO_printf( Perl_debug_log, |
3dab1dad YO |
2570 | "%*s- %s (%d) <SCAN FINISHED>\n", (int)depth * 2 + 2, |
2571 | "", SvPV_nolen_const( mysv ),REG_NODE_NUM(cur)); | |
a3621e74 YO |
2572 | |
2573 | }); | |
2574 | if ( last ) { | |
786e8c11 | 2575 | made= make_trie( pRExC_state, startbranch, first, scan, tail, count, optype, depth+1 ); |
3dab1dad | 2576 | #ifdef TRIE_STUDY_OPT |
786e8c11 YO |
2577 | if ( ((made == MADE_EXACT_TRIE && |
2578 | startbranch == first) | |
2579 | || ( first_non_open == first )) && | |
2580 | depth==0 ) | |
2581 | flags |= SCF_TRIE_RESTUDY; | |
3dab1dad | 2582 | #endif |
07be1b83 | 2583 | } |
a3621e74 | 2584 | } |
3dab1dad YO |
2585 | |
2586 | } /* do trie */ | |
786e8c11 | 2587 | |
a0ed51b3 | 2588 | } |
a3621e74 | 2589 | else if ( code == BRANCHJ ) { /* single branch is optimized. */ |
c277df42 | 2590 | scan = NEXTOPER(NEXTOPER(scan)); |
a3621e74 | 2591 | } else /* single branch is optimized. */ |
c277df42 IZ |
2592 | scan = NEXTOPER(scan); |
2593 | continue; | |
a0ed51b3 LW |
2594 | } |
2595 | else if (OP(scan) == EXACT) { | |
cd439c50 | 2596 | I32 l = STR_LEN(scan); |
c445ea15 | 2597 | UV uc; |
a0ed51b3 | 2598 | if (UTF) { |
a3b680e6 | 2599 | const U8 * const s = (U8*)STRING(scan); |
1aa99e6b | 2600 | l = utf8_length(s, s + l); |
9041c2e3 | 2601 | uc = utf8_to_uvchr(s, NULL); |
c445ea15 AL |
2602 | } else { |
2603 | uc = *((U8*)STRING(scan)); | |
a0ed51b3 LW |
2604 | } |
2605 | min += l; | |
c277df42 | 2606 | if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */ |
c277df42 IZ |
2607 | /* The code below prefers earlier match for fixed |
2608 | offset, later match for variable offset. */ | |
2609 | if (data->last_end == -1) { /* Update the start info. */ | |
2610 | data->last_start_min = data->pos_min; | |
2611 | data->last_start_max = is_inf | |
b81d288d | 2612 | ? I32_MAX : data->pos_min + data->pos_delta; |
c277df42 | 2613 | } |
cd439c50 | 2614 | sv_catpvn(data->last_found, STRING(scan), STR_LEN(scan)); |
45f47268 NC |
2615 | if (UTF) |
2616 | SvUTF8_on(data->last_found); | |
0eda9292 | 2617 | { |
9a957fbc | 2618 | SV * const sv = data->last_found; |
a28509cc | 2619 | MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? |
0eda9292 JH |
2620 | mg_find(sv, PERL_MAGIC_utf8) : NULL; |
2621 | if (mg && mg->mg_len >= 0) | |
5e43f467 JH |
2622 | mg->mg_len += utf8_length((U8*)STRING(scan), |
2623 | (U8*)STRING(scan)+STR_LEN(scan)); | |
0eda9292 | 2624 | } |
c277df42 IZ |
2625 | data->last_end = data->pos_min + l; |
2626 | data->pos_min += l; /* As in the first entry. */ | |
2627 | data->flags &= ~SF_BEFORE_EOL; | |
2628 | } | |
653099ff GS |
2629 | if (flags & SCF_DO_STCLASS_AND) { |
2630 | /* Check whether it is compatible with what we know already! */ | |
2631 | int compat = 1; | |
2632 | ||
1aa99e6b | 2633 | if (uc >= 0x100 || |
516a5887 | 2634 | (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE)) |
1aa99e6b | 2635 | && !ANYOF_BITMAP_TEST(data->start_class, uc) |
653099ff | 2636 | && (!(data->start_class->flags & ANYOF_FOLD) |
1aa99e6b | 2637 | || !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc]))) |
516a5887 | 2638 | ) |
653099ff GS |
2639 | compat = 0; |
2640 | ANYOF_CLASS_ZERO(data->start_class); | |
2641 | ANYOF_BITMAP_ZERO(data->start_class); | |
2642 | if (compat) | |
1aa99e6b | 2643 | ANYOF_BITMAP_SET(data->start_class, uc); |
653099ff | 2644 | data->start_class->flags &= ~ANYOF_EOS; |
9b877dbb IH |
2645 | if (uc < 0x100) |
2646 | data->start_class->flags &= ~ANYOF_UNICODE_ALL; | |
653099ff GS |
2647 | } |
2648 | else if (flags & SCF_DO_STCLASS_OR) { | |
2649 | /* false positive possible if the class is case-folded */ | |
1aa99e6b | 2650 | if (uc < 0x100) |
9b877dbb IH |
2651 | ANYOF_BITMAP_SET(data->start_class, uc); |
2652 | else | |
2653 | data->start_class->flags |= ANYOF_UNICODE_ALL; | |
653099ff GS |
2654 | data->start_class->flags &= ~ANYOF_EOS; |
2655 | cl_and(data->start_class, &and_with); | |
2656 | } | |
2657 | flags &= ~SCF_DO_STCLASS; | |
a0ed51b3 | 2658 | } |
3dab1dad | 2659 | else if (PL_regkind[OP(scan)] == EXACT) { /* But OP != EXACT! */ |
cd439c50 | 2660 | I32 l = STR_LEN(scan); |
1aa99e6b | 2661 | UV uc = *((U8*)STRING(scan)); |
653099ff GS |
2662 | |
2663 | /* Search for fixed substrings supports EXACT only. */ | |
ecaa9b9c NC |
2664 | if (flags & SCF_DO_SUBSTR) { |
2665 | assert(data); | |
1de06328 | 2666 | scan_commit(pRExC_state, data, minlenp); |
ecaa9b9c | 2667 | } |
a0ed51b3 | 2668 | if (UTF) { |
6136c704 | 2669 | const U8 * const s = (U8 *)STRING(scan); |
1aa99e6b | 2670 | l = utf8_length(s, s + l); |
9041c2e3 | 2671 | uc = utf8_to_uvchr(s, NULL); |
a0ed51b3 LW |
2672 | } |
2673 | min += l; | |
ecaa9b9c | 2674 | if (flags & SCF_DO_SUBSTR) |
a0ed51b3 | 2675 | data->pos_min += l; |
653099ff GS |
2676 | if (flags & SCF_DO_STCLASS_AND) { |
2677 | /* Check whether it is compatible with what we know already! */ | |
2678 | int compat = 1; | |
2679 | ||
1aa99e6b | 2680 | if (uc >= 0x100 || |
516a5887 | 2681 | (!(data->start_class->flags & (ANYOF_CLASS | ANYOF_LOCALE)) |
1aa99e6b | 2682 | && !ANYOF_BITMAP_TEST(data->start_class, uc) |
516a5887 | 2683 | && !ANYOF_BITMAP_TEST(data->start_class, PL_fold[uc]))) |
653099ff GS |
2684 | compat = 0; |
2685 | ANYOF_CLASS_ZERO(data->start_class); | |
2686 | ANYOF_BITMAP_ZERO(data->start_class); | |
2687 | if (compat) { | |
1aa99e6b | 2688 | ANYOF_BITMAP_SET(data->start_class, uc); |
653099ff GS |
2689 | data->start_class->flags &= ~ANYOF_EOS; |
2690 | data->start_class->flags |= ANYOF_FOLD; | |
2691 | if (OP(scan) == EXACTFL) | |
2692 | data->start_class->flags |= ANYOF_LOCALE; | |
2693 | } | |
2694 | } | |
2695 | else if (flags & SCF_DO_STCLASS_OR) { | |
2696 | if (data->start_class->flags & ANYOF_FOLD) { | |
2697 | /* false positive possible if the class is case-folded. | |
2698 | Assume that the locale settings are the same... */ | |
1aa99e6b IH |
2699 | if (uc < 0x100) |
2700 | ANYOF_BITMAP_SET(data->start_class, uc); | |
653099ff GS |
2701 | data->start_class->flags &= ~ANYOF_EOS; |
2702 | } | |
2703 | cl_and(data->start_class, &and_with); | |
2704 | } | |
2705 | flags &= ~SCF_DO_STCLASS; | |
a0ed51b3 | 2706 | } |
bfed75c6 | 2707 | else if (strchr((const char*)PL_varies,OP(scan))) { |
9c5ffd7c | 2708 | I32 mincount, maxcount, minnext, deltanext, fl = 0; |
aa7a4b56 | 2709 | I32 f = flags, pos_before = 0; |
d4c19fe8 | 2710 | regnode * const oscan = scan; |
653099ff GS |
2711 | struct regnode_charclass_class this_class; |
2712 | struct regnode_charclass_class *oclass = NULL; | |
727f22e3 | 2713 | I32 next_is_eval = 0; |
653099ff | 2714 | |
3dab1dad | 2715 | switch (PL_regkind[OP(scan)]) { |
653099ff | 2716 | case WHILEM: /* End of (?:...)* . */ |
c277df42 IZ |
2717 | scan = NEXTOPER(scan); |
2718 | goto finish; | |
2719 | case PLUS: | |
653099ff | 2720 | if (flags & (SCF_DO_SUBSTR | SCF_DO_STCLASS)) { |
c277df42 | 2721 | next = NEXTOPER(scan); |
653099ff | 2722 | if (OP(next) == EXACT || (flags & SCF_DO_STCLASS)) { |
b81d288d AB |
2723 | mincount = 1; |
2724 | maxcount = REG_INFTY; | |
c277df42 IZ |
2725 | next = regnext(scan); |
2726 | scan = NEXTOPER(scan); | |
2727 | goto do_curly; | |
2728 | } | |
2729 | } | |
2730 | if (flags & SCF_DO_SUBSTR) | |
2731 | data->pos_min++; | |
2732 | min++; | |
2733 | /* Fall through. */ | |
2734 | case STAR: | |
653099ff GS |
2735 | if (flags & SCF_DO_STCLASS) { |
2736 | mincount = 0; | |
b81d288d | 2737 | maxcount = REG_INFTY; |
653099ff GS |
2738 | next = regnext(scan); |
2739 | scan = NEXTOPER(scan); | |
2740 | goto do_curly; | |
2741 | } | |
b81d288d | 2742 | is_inf = is_inf_internal = 1; |
c277df42 IZ |
2743 | scan = regnext(scan); |
2744 | if (flags & SCF_DO_SUBSTR) { | |
1de06328 | 2745 | scan_commit(pRExC_state, data, minlenp); /* Cannot extend fixed substrings */ |
c277df42 IZ |
2746 | data->longest = &(data->longest_float); |
2747 | } | |
2748 | goto optimize_curly_tail; | |
2749 | case CURLY: | |
b81d288d | 2750 | mincount = ARG1(scan); |
c277df42 IZ |
2751 | maxcount = ARG2(scan); |
2752 | next = regnext(scan); | |
cb434fcc IZ |
2753 | if (OP(scan) == CURLYX) { |
2754 | I32 lp = (data ? *(data->last_closep) : 0); | |
786e8c11 | 2755 | scan->flags = ((lp <= (I32)U8_MAX) ? (U8)lp : U8_MAX); |
cb434fcc | 2756 | } |
c277df42 | 2757 | scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS; |
727f22e3 | 2758 | next_is_eval = (OP(scan) == EVAL); |
c277df42 IZ |
2759 | do_curly: |
2760 | if (flags & SCF_DO_SUBSTR) { | |
1de06328 | 2761 | if (mincount == 0) scan_commit(pRExC_state,data,minlenp); /* Cannot extend fixed substrings */ |
c277df42 IZ |
2762 | pos_before = data->pos_min; |
2763 | } | |
2764 | if (data) { | |
2765 | fl = data->flags; | |
2766 | data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL); | |
2767 | if (is_inf) | |
2768 | data->flags |= SF_IS_INF; | |
2769 | } | |
653099ff | 2770 | if (flags & SCF_DO_STCLASS) { |
830247a4 | 2771 | cl_init(pRExC_state, &this_class); |
653099ff GS |
2772 | oclass = data->start_class; |
2773 | data->start_class = &this_class; | |
2774 | f |= SCF_DO_STCLASS_AND; | |
2775 | f &= ~SCF_DO_STCLASS_OR; | |
2776 | } | |
e1901655 IZ |
2777 | /* These are the cases when once a subexpression |
2778 | fails at a particular position, it cannot succeed | |
2779 | even after backtracking at the enclosing scope. | |
b81d288d | 2780 | |
e1901655 IZ |
2781 | XXXX what if minimal match and we are at the |
2782 | initial run of {n,m}? */ | |
2783 | if ((mincount != maxcount - 1) && (maxcount != REG_INFTY)) | |
2784 | f &= ~SCF_WHILEM_VISITED_POS; | |
653099ff | 2785 | |
c277df42 | 2786 | /* This will finish on WHILEM, setting scan, or on NULL: */ |
1de06328 | 2787 | minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext, last, data, |
a3621e74 YO |
2788 | (mincount == 0 |
2789 | ? (f & ~SCF_DO_SUBSTR) : f),depth+1); | |
653099ff GS |
2790 | |
2791 | if (flags & SCF_DO_STCLASS) | |
2792 | data->start_class = oclass; | |
2793 | if (mincount == 0 || minnext == 0) { | |
2794 | if (flags & SCF_DO_STCLASS_OR) { | |
830247a4 | 2795 | cl_or(pRExC_state, data->start_class, &this_class); |
653099ff GS |
2796 | } |
2797 | else if (flags & SCF_DO_STCLASS_AND) { | |
b81d288d | 2798 | /* Switch to OR mode: cache the old value of |
653099ff GS |
2799 | * data->start_class */ |
2800 | StructCopy(data->start_class, &and_with, | |
2801 | struct regnode_charclass_class); | |
2802 | flags &= ~SCF_DO_STCLASS_AND; | |
2803 | StructCopy(&this_class, data->start_class, | |
2804 | struct regnode_charclass_class); | |
2805 | flags |= SCF_DO_STCLASS_OR; | |
2806 | data->start_class->flags |= ANYOF_EOS; | |
2807 | } | |
2808 | } else { /* Non-zero len */ | |
2809 | if (flags & SCF_DO_STCLASS_OR) { | |
830247a4 | 2810 | cl_or(pRExC_state, data->start_class, &this_class); |
653099ff GS |
2811 | cl_and(data->start_class, &and_with); |
2812 | } | |
2813 | else if (flags & SCF_DO_STCLASS_AND) | |
2814 | cl_and(data->start_class, &this_class); | |
2815 | flags &= ~SCF_DO_STCLASS; | |
2816 | } | |
c277df42 IZ |
2817 | if (!scan) /* It was not CURLYX, but CURLY. */ |
2818 | scan = next; | |
041457d9 DM |
2819 | if ( /* ? quantifier ok, except for (?{ ... }) */ |
2820 | (next_is_eval || !(mincount == 0 && maxcount == 1)) | |
84037bb0 | 2821 | && (minnext == 0) && (deltanext == 0) |
99799961 | 2822 | && data && !(data->flags & (SF_HAS_PAR|SF_IN_PAR)) |
041457d9 DM |
2823 | && maxcount <= REG_INFTY/3 /* Complement check for big count */ |
2824 | && ckWARN(WARN_REGEXP)) | |
b45f050a | 2825 | { |
830247a4 | 2826 | vWARN(RExC_parse, |
b45f050a JF |
2827 | "Quantifier unexpected on zero-length expression"); |
2828 | } | |
2829 | ||
c277df42 | 2830 | min += minnext * mincount; |
b81d288d | 2831 | is_inf_internal |= ((maxcount == REG_INFTY |
155aba94 GS |
2832 | && (minnext + deltanext) > 0) |
2833 | || deltanext == I32_MAX); | |
aca2d497 | 2834 | is_inf |= is_inf_internal; |
c277df42 IZ |
2835 | delta += (minnext + deltanext) * maxcount - minnext * mincount; |
2836 | ||
2837 | /* Try powerful optimization CURLYX => CURLYN. */ | |
b81d288d | 2838 | if ( OP(oscan) == CURLYX && data |
c277df42 IZ |
2839 | && data->flags & SF_IN_PAR |
2840 | && !(data->flags & SF_HAS_EVAL) | |
2841 | && !deltanext && minnext == 1 ) { | |
2842 | /* Try to optimize to CURLYN. */ | |
2843 | regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; | |
d4c19fe8 | 2844 | regnode * const nxt1 = nxt; |
497b47a8 JH |
2845 | #ifdef DEBUGGING |
2846 | regnode *nxt2; | |
2847 | #endif | |
c277df42 IZ |
2848 | |
2849 | /* Skip open. */ | |
2850 | nxt = regnext(nxt); | |
bfed75c6 | 2851 | if (!strchr((const char*)PL_simple,OP(nxt)) |
3dab1dad | 2852 | && !(PL_regkind[OP(nxt)] == EXACT |
b81d288d | 2853 | && STR_LEN(nxt) == 1)) |
c277df42 | 2854 | goto nogo; |
497b47a8 | 2855 | #ifdef DEBUGGING |
c277df42 | 2856 | nxt2 = nxt; |
497b47a8 | 2857 | #endif |
c277df42 | 2858 | nxt = regnext(nxt); |
b81d288d | 2859 | if (OP(nxt) != CLOSE) |
c277df42 IZ |
2860 | goto nogo; |
2861 | /* Now we know that nxt2 is the only contents: */ | |
eb160463 | 2862 | oscan->flags = (U8)ARG(nxt); |
c277df42 IZ |
2863 | OP(oscan) = CURLYN; |
2864 | OP(nxt1) = NOTHING; /* was OPEN. */ | |
2865 | #ifdef DEBUGGING | |
2866 | OP(nxt1 + 1) = OPTIMIZED; /* was count. */ | |
2867 | NEXT_OFF(nxt1+ 1) = 0; /* just for consistancy. */ | |
2868 | NEXT_OFF(nxt2) = 0; /* just for consistancy with CURLY. */ | |
2869 | OP(nxt) = OPTIMIZED; /* was CLOSE. */ | |
2870 | OP(nxt + 1) = OPTIMIZED; /* was count. */ | |
2871 | NEXT_OFF(nxt+ 1) = 0; /* just for consistancy. */ | |
b81d288d | 2872 | #endif |
c277df42 | 2873 | } |
c277df42 IZ |
2874 | nogo: |
2875 | ||
2876 | /* Try optimization CURLYX => CURLYM. */ | |
b81d288d | 2877 | if ( OP(oscan) == CURLYX && data |
c277df42 | 2878 | && !(data->flags & SF_HAS_PAR) |
c277df42 | 2879 | && !(data->flags & SF_HAS_EVAL) |
0e788c72 HS |
2880 | && !deltanext /* atom is fixed width */ |
2881 | && minnext != 0 /* CURLYM can't handle zero width */ | |
2882 | ) { | |
c277df42 IZ |
2883 | /* XXXX How to optimize if data == 0? */ |
2884 | /* Optimize to a simpler form. */ | |
2885 | regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN */ | |
2886 | regnode *nxt2; | |
2887 | ||
2888 | OP(oscan) = CURLYM; | |
2889 | while ( (nxt2 = regnext(nxt)) /* skip over embedded stuff*/ | |
b81d288d | 2890 | && (OP(nxt2) != WHILEM)) |
c277df42 IZ |
2891 | nxt = nxt2; |
2892 | OP(nxt2) = SUCCEED; /* Whas WHILEM */ | |
c277df42 IZ |
2893 | /* Need to optimize away parenths. */ |
2894 | if (data->flags & SF_IN_PAR) { | |
2895 | /* Set the parenth number. */ | |
2896 | regnode *nxt1 = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN*/ | |
2897 | ||
b81d288d | 2898 | if (OP(nxt) != CLOSE) |
b45f050a | 2899 | FAIL("Panic opt close"); |
eb160463 | 2900 | oscan->flags = (U8)ARG(nxt); |
c277df42 IZ |
2901 | OP(nxt1) = OPTIMIZED; /* was OPEN. */ |
2902 | OP(nxt) = OPTIMIZED; /* was CLOSE. */ | |
2903 | #ifdef DEBUGGING | |
2904 | OP(nxt1 + 1) = OPTIMIZED; /* was count. */ | |
2905 | OP(nxt + 1) = OPTIMIZED; /* was count. */ | |
2906 | NEXT_OFF(nxt1 + 1) = 0; /* just for consistancy. */ | |
2907 | NEXT_OFF(nxt + 1) = 0; /* just for consistancy. */ | |
b81d288d | 2908 | #endif |
c277df42 IZ |
2909 | #if 0 |
2910 | while ( nxt1 && (OP(nxt1) != WHILEM)) { | |
2911 | regnode *nnxt = regnext(nxt1); | |
b81d288d | 2912 | |
c277df42 IZ |
2913 | if (nnxt == nxt) { |
2914 | if (reg_off_by_arg[OP(nxt1)]) | |
2915 | ARG_SET(nxt1, nxt2 - nxt1); | |
2916 | else if (nxt2 - nxt1 < U16_MAX) | |
2917 | NEXT_OFF(nxt1) = nxt2 - nxt1; | |
2918 | else | |
2919 | OP(nxt) = NOTHING; /* Cannot beautify */ | |
2920 | } | |
2921 | nxt1 = nnxt; | |
2922 | } | |
2923 | #endif | |
2924 | /* Optimize again: */ | |
1de06328 | 2925 | study_chunk(pRExC_state, &nxt1, minlenp, &deltanext, nxt, |
a3621e74 | 2926 | NULL, 0,depth+1); |
a0ed51b3 LW |
2927 | } |
2928 | else | |
c277df42 | 2929 | oscan->flags = 0; |
c277df42 | 2930 | } |
e1901655 IZ |
2931 | else if ((OP(oscan) == CURLYX) |
2932 | && (flags & SCF_WHILEM_VISITED_POS) | |
2933 | /* See the comment on a similar expression above. | |
2934 | However, this time it not a subexpression | |
2935 | we care about, but the expression itself. */ | |
2936 | && (maxcount == REG_INFTY) | |
2937 | && data && ++data->whilem_c < 16) { | |
2938 | /* This stays as CURLYX, we can put the count/of pair. */ | |
2c2d71f5 JH |
2939 | /* Find WHILEM (as in regexec.c) */ |
2940 | regnode *nxt = oscan + NEXT_OFF(oscan); | |
2941 | ||
2942 | if (OP(PREVOPER(nxt)) == NOTHING) /* LONGJMP */ | |
2943 | nxt += ARG(nxt); | |
eb160463 GS |
2944 | PREVOPER(nxt)->flags = (U8)(data->whilem_c |
2945 | | (RExC_whilem_seen << 4)); /* On WHILEM */ | |
2c2d71f5 | 2946 | } |
b81d288d | 2947 | if (data && fl & (SF_HAS_PAR|SF_IN_PAR)) |
c277df42 IZ |
2948 | pars++; |
2949 | if (flags & SCF_DO_SUBSTR) { | |
c445ea15 | 2950 | SV *last_str = NULL; |
c277df42 IZ |
2951 | int counted = mincount != 0; |
2952 | ||
2953 | if (data->last_end > 0 && mincount != 0) { /* Ends with a string. */ | |
5d1c421c JH |
2954 | #if defined(SPARC64_GCC_WORKAROUND) |
2955 | I32 b = 0; | |
2956 | STRLEN l = 0; | |
cfd0369c | 2957 | const char *s = NULL; |
5d1c421c JH |
2958 | I32 old = 0; |
2959 | ||
2960 | if (pos_before >= data->last_start_min) | |
2961 | b = pos_before; | |
2962 | else | |
2963 | b = data->last_start_min; | |
2964 | ||
2965 | l = 0; | |
cfd0369c | 2966 | s = SvPV_const(data->last_found, l); |
5d1c421c JH |
2967 | old = b - data->last_start_min; |
2968 | ||
2969 | #else | |
b81d288d | 2970 | I32 b = pos_before >= data->last_start_min |
c277df42 IZ |
2971 | ? pos_before : data->last_start_min; |
2972 | STRLEN l; | |
d4c19fe8 | 2973 | const char * const s = SvPV_const(data->last_found, l); |
a0ed51b3 | 2974 | I32 old = b - data->last_start_min; |
5d1c421c | 2975 | #endif |
a0ed51b3 LW |
2976 | |
2977 | if (UTF) | |
2978 | old = utf8_hop((U8*)s, old) - (U8*)s; | |
c277df42 | 2979 | |
a0ed51b3 | 2980 | l -= old; |
c277df42 | 2981 | /* Get the added string: */ |
79cb57f6 | 2982 | last_str = newSVpvn(s + old, l); |
0e933229 IH |
2983 | if (UTF) |
2984 | SvUTF8_on(last_str); | |
c277df42 IZ |
2985 | if (deltanext == 0 && pos_before == b) { |
2986 | /* What was added is a constant string */ | |
2987 | if (mincount > 1) { | |
2988 | SvGROW(last_str, (mincount * l) + 1); | |
b81d288d | 2989 | repeatcpy(SvPVX(last_str) + l, |
3f7c398e | 2990 | SvPVX_const(last_str), l, mincount - 1); |
b162af07 | 2991 | SvCUR_set(last_str, SvCUR(last_str) * mincount); |
c277df42 | 2992 | /* Add additional parts. */ |
b81d288d | 2993 | SvCUR_set(data->last_found, |
c277df42 IZ |
2994 | SvCUR(data->last_found) - l); |
2995 | sv_catsv(data->last_found, last_str); | |
0eda9292 JH |
2996 | { |
2997 | SV * sv = data->last_found; | |
2998 | MAGIC *mg = | |
2999 | SvUTF8(sv) && SvMAGICAL(sv) ? | |
3000 | mg_find(sv, PERL_MAGIC_utf8) : NULL; | |
3001 | if (mg && mg->mg_len >= 0) | |
3002 | mg->mg_len += CHR_SVLEN(last_str); | |
3003 | } | |
c277df42 IZ |
3004 | data->last_end += l * (mincount - 1); |
3005 | } | |
2a8d9689 HS |
3006 | } else { |
3007 | /* start offset must point into the last copy */ | |
3008 | data->last_start_min += minnext * (mincount - 1); | |
c152dc43 HS |
3009 | data->last_start_max += is_inf ? I32_MAX |
3010 | : (maxcount - 1) * (minnext + data->pos_delta); | |
c277df42 IZ |
3011 | } |
3012 | } | |
3013 | /* It is counted once already... */ | |
3014 | data->pos_min += minnext * (mincount - counted); | |
3015 | data->pos_delta += - counted * deltanext + | |
3016 | (minnext + deltanext) * maxcount - minnext * mincount; | |
3017 | if (mincount != maxcount) { | |
653099ff GS |
3018 | /* Cannot extend fixed substrings found inside |
3019 | the group. */ | |
1de06328 | 3020 | scan_commit(pRExC_state,data,minlenp); |
c277df42 | 3021 | if (mincount && last_str) { |
d4c19fe8 AL |
3022 | SV * const sv = data->last_found; |
3023 | MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? | |
45f47268 NC |
3024 | mg_find(sv, PERL_MAGIC_utf8) : NULL; |
3025 | ||
3026 | if (mg) | |
3027 | mg->mg_len = -1; | |
3028 | sv_setsv(sv, last_str); | |
c277df42 | 3029 | data->last_end = data->pos_min; |
b81d288d | 3030 | data->last_start_min = |
a0ed51b3 | 3031 | data->pos_min - CHR_SVLEN(last_str); |
b81d288d AB |
3032 | data->last_start_max = is_inf |
3033 | ? I32_MAX | |
c277df42 | 3034 | : data->pos_min + data->pos_delta |
a0ed51b3 | 3035 | - CHR_SVLEN(last_str); |
c277df42 IZ |
3036 | } |
3037 | data->longest = &(data->longest_float); | |
3038 | } | |
aca2d497 | 3039 | SvREFCNT_dec(last_str); |
c277df42 | 3040 | } |
405ff068 | 3041 | if (data && (fl & SF_HAS_EVAL)) |
c277df42 IZ |
3042 | data->flags |= SF_HAS_EVAL; |
3043 | optimize_curly_tail: | |
c277df42 | 3044 | if (OP(oscan) != CURLYX) { |
3dab1dad | 3045 | while (PL_regkind[OP(next = regnext(oscan))] == NOTHING |
c277df42 IZ |
3046 | && NEXT_OFF(next)) |
3047 | NEXT_OFF(oscan) += NEXT_OFF(next); | |
3048 | } | |
c277df42 | 3049 | continue; |
653099ff | 3050 | default: /* REF and CLUMP only? */ |
c277df42 | 3051 | if (flags & SCF_DO_SUBSTR) { |
1de06328 | 3052 | scan_commit(pRExC_state,data,minlenp); /* Cannot expect anything... */ |
c277df42 IZ |
3053 | data->longest = &(data->longest_float); |
3054 | } | |
aca2d497 | 3055 | is_inf = is_inf_internal = 1; |
653099ff | 3056 | if (flags & SCF_DO_STCLASS_OR) |
830247a4 | 3057 | cl_anything(pRExC_state, data->start_class); |
653099ff | 3058 | flags &= ~SCF_DO_STCLASS; |
c277df42 IZ |
3059 | break; |
3060 | } | |
a0ed51b3 | 3061 | } |
bfed75c6 | 3062 | else if (strchr((const char*)PL_simple,OP(scan))) { |
9c5ffd7c | 3063 | int value = 0; |
653099ff | 3064 | |
c277df42 | 3065 | if (flags & SCF_DO_SUBSTR) { |
1de06328 | 3066 | scan_commit(pRExC_state,data,minlenp); |
c277df42 IZ |
3067 | data->pos_min++; |
3068 | } | |
3069 | min++; | |
653099ff GS |
3070 | if (flags & SCF_DO_STCLASS) { |
3071 | data->start_class->flags &= ~ANYOF_EOS; /* No match on empty */ | |
3072 | ||
3073 | /* Some of the logic below assumes that switching | |
3074 | locale on will only add false positives. */ | |
3dab1dad | 3075 | switch (PL_regkind[OP(scan)]) { |
653099ff | 3076 | case SANY: |
653099ff GS |
3077 | default: |
3078 | do_default: | |
3079 | /* Perl_croak(aTHX_ "panic: unexpected simple REx opcode %d", OP(scan)); */ | |
3080 | if (flags & SCF_DO_STCLASS_OR) /* Allow everything */ | |
830247a4 | 3081 | cl_anything(pRExC_state, data->start_class); |
653099ff GS |
3082 | break; |
3083 | case REG_ANY: | |
3084 | if (OP(scan) == SANY) | |
3085 | goto do_default; | |
3086 | if (flags & SCF_DO_STCLASS_OR) { /* Everything but \n */ | |
3087 | value = (ANYOF_BITMAP_TEST(data->start_class,'\n') | |
3088 | || (data->start_class->flags & ANYOF_CLASS)); | |
830247a4 | 3089 | cl_anything(pRExC_state, data->start_class); |
653099ff GS |
3090 | } |
3091 | if (flags & SCF_DO_STCLASS_AND || !value) | |
3092 | ANYOF_BITMAP_CLEAR(data->start_class,'\n'); | |
3093 | break; | |
3094 | case ANYOF: | |
3095 | if (flags & SCF_DO_STCLASS_AND) | |
3096 | cl_and(data->start_class, | |
3097 | (struct regnode_charclass_class*)scan); | |
3098 | else | |
830247a4 | 3099 | cl_or(pRExC_state, data->start_class, |
653099ff GS |
3100 | (struct regnode_charclass_class*)scan); |
3101 | break; | |
3102 | case ALNUM: | |
3103 | if (flags & SCF_DO_STCLASS_AND) { | |
3104 | if (!(data->start_class->flags & ANYOF_LOCALE)) { | |
3105 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM); | |
3106 | for (value = 0; value < 256; value++) | |
3107 | if (!isALNUM(value)) | |
3108 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3109 | } | |
3110 | } | |
3111 | else { | |
3112 | if (data->start_class->flags & ANYOF_LOCALE) | |
3113 | ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM); | |
3114 | else { | |
3115 | for (value = 0; value < 256; value++) | |
3116 | if (isALNUM(value)) | |
b81d288d | 3117 | ANYOF_BITMAP_SET(data->start_class, value); |
653099ff GS |
3118 | } |
3119 | } | |
3120 | break; | |
3121 | case ALNUML: | |
3122 | if (flags & SCF_DO_STCLASS_AND) { | |
3123 | if (data->start_class->flags & ANYOF_LOCALE) | |
3124 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NALNUM); | |
3125 | } | |
3126 | else { | |
3127 | ANYOF_CLASS_SET(data->start_class,ANYOF_ALNUM); | |
3128 | data->start_class->flags |= ANYOF_LOCALE; | |
3129 | } | |
3130 | break; | |
3131 | case NALNUM: | |
3132 | if (flags & SCF_DO_STCLASS_AND) { | |
3133 | if (!(data->start_class->flags & ANYOF_LOCALE)) { | |
3134 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM); | |
3135 | for (value = 0; value < 256; value++) | |
3136 | if (isALNUM(value)) | |
3137 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3138 | } | |
3139 | } | |
3140 | else { | |
3141 | if (data->start_class->flags & ANYOF_LOCALE) | |
3142 | ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM); | |
3143 | else { | |
3144 | for (value = 0; value < 256; value++) | |
3145 | if (!isALNUM(value)) | |
b81d288d | 3146 | ANYOF_BITMAP_SET(data->start_class, value); |
653099ff GS |
3147 | } |
3148 | } | |
3149 | break; | |
3150 | case NALNUML: | |
3151 | if (flags & SCF_DO_STCLASS_AND) { | |
3152 | if (data->start_class->flags & ANYOF_LOCALE) | |
3153 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_ALNUM); | |
3154 | } | |
3155 | else { | |
3156 | data->start_class->flags |= ANYOF_LOCALE; | |
3157 | ANYOF_CLASS_SET(data->start_class,ANYOF_NALNUM); | |
3158 | } | |
3159 | break; | |
3160 | case SPACE: | |
3161 | if (flags & SCF_DO_STCLASS_AND) { | |
3162 | if (!(data->start_class->flags & ANYOF_LOCALE)) { | |
3163 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE); | |
3164 | for (value = 0; value < 256; value++) | |
3165 | if (!isSPACE(value)) | |
3166 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3167 | } | |
3168 | } | |
3169 | else { | |
3170 | if (data->start_class->flags & ANYOF_LOCALE) | |
3171 | ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE); | |
3172 | else { | |
3173 | for (value = 0; value < 256; value++) | |
3174 | if (isSPACE(value)) | |
b81d288d | 3175 | ANYOF_BITMAP_SET(data->start_class, value); |
653099ff GS |
3176 | } |
3177 | } | |
3178 | break; | |
3179 | case SPACEL: | |
3180 | if (flags & SCF_DO_STCLASS_AND) { | |
3181 | if (data->start_class->flags & ANYOF_LOCALE) | |
3182 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NSPACE); | |
3183 | } | |
3184 | else { | |
3185 | data->start_class->flags |= ANYOF_LOCALE; | |
3186 | ANYOF_CLASS_SET(data->start_class,ANYOF_SPACE); | |
3187 | } | |
3188 | break; | |
3189 | case NSPACE: | |
3190 | if (flags & SCF_DO_STCLASS_AND) { | |
3191 | if (!(data->start_class->flags & ANYOF_LOCALE)) { | |
3192 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE); | |
3193 | for (value = 0; value < 256; value++) | |
3194 | if (isSPACE(value)) | |
3195 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3196 | } | |
3197 | } | |
3198 | else { | |
3199 | if (data->start_class->flags & ANYOF_LOCALE) | |
3200 | ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE); | |
3201 | else { | |
3202 | for (value = 0; value < 256; value++) | |
3203 | if (!isSPACE(value)) | |
b81d288d | 3204 | ANYOF_BITMAP_SET(data->start_class, value); |
653099ff GS |
3205 | } |
3206 | } | |
3207 | break; | |
3208 | case NSPACEL: | |
3209 | if (flags & SCF_DO_STCLASS_AND) { | |
3210 | if (data->start_class->flags & ANYOF_LOCALE) { | |
3211 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_SPACE); | |
3212 | for (value = 0; value < 256; value++) | |
3213 | if (!isSPACE(value)) | |
3214 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3215 | } | |
3216 | } | |
3217 | else { | |
3218 | data->start_class->flags |= ANYOF_LOCALE; | |
3219 | ANYOF_CLASS_SET(data->start_class,ANYOF_NSPACE); | |
3220 | } | |
3221 | break; | |
3222 | case DIGIT: | |
3223 | if (flags & SCF_DO_STCLASS_AND) { | |
3224 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_NDIGIT); | |
3225 | for (value = 0; value < 256; value++) | |
3226 | if (!isDIGIT(value)) | |
3227 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3228 | } | |
3229 | else { | |
3230 | if (data->start_class->flags & ANYOF_LOCALE) | |
3231 | ANYOF_CLASS_SET(data->start_class,ANYOF_DIGIT); | |
3232 | else { | |
3233 | for (value = 0; value < 256; value++) | |
3234 | if (isDIGIT(value)) | |
b81d288d | 3235 | ANYOF_BITMAP_SET(data->start_class, value); |
653099ff GS |
3236 | } |
3237 | } | |
3238 | break; | |
3239 | case NDIGIT: | |
3240 | if (flags & SCF_DO_STCLASS_AND) { | |
3241 | ANYOF_CLASS_CLEAR(data->start_class,ANYOF_DIGIT); | |
3242 | for (value = 0; value < 256; value++) | |
3243 | if (isDIGIT(value)) | |
3244 | ANYOF_BITMAP_CLEAR(data->start_class, value); | |
3245 | } | |
3246 | else { | |
3247 | if (data->start_class->flags & ANYOF_LOCALE) | |
3248 | ANYOF_CLASS_SET(data->start_class,ANYOF_NDIGIT); | |
3249 | else { | |
3250 | for (value = 0; value < 256; value++) | |
3251 | if (!isDIGIT(value)) | |
b81d288d | 3252 | ANYOF_BITMAP_SET(data->start_class, value); |
653099ff GS |
3253 | } |
3254 | } | |
3255 | break; | |
3256 | } | |
3257 | if (flags & SCF_DO_STCLASS_OR) | |
3258 | cl_and(data->start_class, &and_with); | |
3259 | flags &= ~SCF_DO_STCLASS; | |
3260 | } | |
a0ed51b3 | 3261 | } |
3dab1dad | 3262 | else if (PL_regkind[OP(scan)] == EOL && flags & SCF_DO_SUBSTR) { |
c277df42 IZ |
3263 | data->flags |= (OP(scan) == MEOL |
3264 | ? SF_BEFORE_MEOL | |
3265 | : SF_BEFORE_SEOL); | |
a0ed51b3 | 3266 | } |
3dab1dad | 3267 | else if ( PL_regkind[OP(scan)] == BRANCHJ |
653099ff GS |
3268 | /* Lookbehind, or need to calculate parens/evals/stclass: */ |
3269 | && (scan->flags || data || (flags & SCF_DO_STCLASS)) | |
c277df42 | 3270 | && (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) { |
1de06328 YO |
3271 | if ( !PERL_ENABLE_POSITIVE_ASSERTION_STUDY |
3272 | || OP(scan) == UNLESSM ) | |
3273 | { | |
3274 | /* Negative Lookahead/lookbehind | |
3275 | In this case we can't do fixed string optimisation. | |
3276 | */ | |
3277 | ||
3278 | I32 deltanext, minnext, fake = 0; | |
3279 | regnode *nscan; | |
3280 | struct regnode_charclass_class intrnl; | |
3281 | int f = 0; | |
3282 | ||
3283 | data_fake.flags = 0; | |
3284 | if (data) { | |
3285 | data_fake.whilem_c = data->whilem_c; | |
3286 | data_fake.last_closep = data->last_closep; | |
a0ed51b3 | 3287 | } |
1de06328 YO |
3288 | else |
3289 | data_fake.last_closep = &fake; | |
3290 | if ( flags & SCF_DO_STCLASS && !scan->flags | |
3291 | && OP(scan) == IFMATCH ) { /* Lookahead */ | |
3292 | cl_init(pRExC_state, &intrnl); | |
3293 | data_fake.start_class = &intrnl; | |
3294 | f |= SCF_DO_STCLASS_AND; | |
c277df42 | 3295 | } |
1de06328 YO |
3296 | if (flags & SCF_WHILEM_VISITED_POS) |
3297 | f |= SCF_WHILEM_VISITED_POS; | |
3298 | next = regnext(scan); | |
3299 | nscan = NEXTOPER(NEXTOPER(scan)); | |
3300 | minnext = study_chunk(pRExC_state, &nscan, minlenp, &deltanext, last, &data_fake, f,depth+1); | |
3301 | if (scan->flags) { | |
3302 | if (deltanext) { | |
3303 | vFAIL("Variable length lookbehind not implemented"); | |
3304 | } | |
3305 | else if (minnext > (I32)U8_MAX) { | |
3306 | vFAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX); | |
3307 | } | |
3308 | scan->flags = (U8)minnext; | |
3309 | } | |
3310 | if (data) { | |
3311 | if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) | |
3312 | pars++; | |
3313 | if (data_fake.flags & SF_HAS_EVAL) | |
3314 | data->flags |= SF_HAS_EVAL; | |
3315 | data->whilem_c = data_fake.whilem_c; | |
3316 | } | |
3317 | if (f & SCF_DO_STCLASS_AND) { | |
3318 | const int was = (data->start_class->flags & ANYOF_EOS); | |
3319 | ||
3320 | cl_and(data->start_class, &intrnl); | |
3321 | if (was) | |
3322 | data->start_class->flags |= ANYOF_EOS; | |
3323 | } | |
be8e71aa | 3324 | } |
1de06328 YO |
3325 | #if PERL_ENABLE_POSITIVE_ASSERTION_STUDY |
3326 | else { | |
3327 | /* Positive Lookahead/lookbehind | |
3328 | In this case we can do fixed string optimisation, | |
3329 | but we must be careful about it. Note in the case of | |
3330 | lookbehind the positions will be offset by the minimum | |
3331 | length of the pattern, something we won't know about | |
3332 | until after the recurse. | |
3333 | */ | |
3334 | I32 deltanext, fake = 0; | |
3335 | regnode *nscan; | |
3336 | struct regnode_charclass_class intrnl; | |
3337 | int f = 0; | |
3338 | /* We use SAVEFREEPV so that when the full compile | |
3339 | is finished perl will clean up the allocated | |
3340 | minlens when its all done. This was we don't | |
3341 | have to worry about freeing them when we know | |
3342 | they wont be used, which would be a pain. | |
3343 | */ | |
3344 | I32 *minnextp; | |
3345 | Newx( minnextp, 1, I32 ); | |
3346 | SAVEFREEPV(minnextp); | |
3347 | ||
3348 | if (data) { | |
3349 | StructCopy(data, &data_fake, scan_data_t); | |
3350 | if ((flags & SCF_DO_SUBSTR) && data->last_found) { | |
3351 | f |= SCF_DO_SUBSTR; | |
3352 | if (scan->flags) | |
3353 | scan_commit(pRExC_state, &data_fake,minlenp); | |
3354 | data_fake.last_found=newSVsv(data->last_found); | |
3355 | } | |
3356 | } | |
3357 | else | |
3358 | data_fake.last_closep = &fake; | |
3359 | data_fake.flags = 0; | |
3360 | if (is_inf) | |
3361 | data_fake.flags |= SF_IS_INF; | |
3362 | if ( flags & SCF_DO_STCLASS && !scan->flags | |
3363 | && OP(scan) == IFMATCH ) { /* Lookahead */ | |
3364 | cl_init(pRExC_state, &intrnl); | |
3365 | data_fake.start_class = &intrnl; | |
3366 | f |= SCF_DO_STCLASS_AND; | |
3367 | } | |
3368 | if (flags & SCF_WHILEM_VISITED_POS) | |
3369 | f |= SCF_WHILEM_VISITED_POS; | |
3370 | next = regnext(scan); | |
3371 | nscan = NEXTOPER(NEXTOPER(scan)); | |
3372 | ||
3373 | *minnextp = study_chunk(pRExC_state, &nscan, minnextp, &deltanext, last, &data_fake, f,depth+1); | |
3374 | if (scan->flags) { | |
3375 | if (deltanext) { | |
3376 | vFAIL("Variable length lookbehind not implemented"); | |
3377 | } | |
3378 | else if (*minnextp > (I32)U8_MAX) { | |
3379 | vFAIL2("Lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX); | |
3380 | } | |
3381 | scan->flags = (U8)*minnextp; | |
3382 | } | |
3383 | ||
3384 | *minnextp += min; | |
3385 | ||
3386 | ||
3387 | if (f & SCF_DO_STCLASS_AND) { | |
3388 | const int was = (data->start_class->flags & ANYOF_EOS); | |
3389 | ||
3390 | cl_and(data->start_class, &intrnl); | |
3391 | if (was) | |
3392 | data->start_class->flags |= ANYOF_EOS; | |
3393 | } | |
3394 | if (data) { | |
3395 | if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) | |
3396 | pars++; | |
3397 | if (data_fake.flags & SF_HAS_EVAL) | |
3398 | data->flags |= SF_HAS_EVAL; | |
3399 | data->whilem_c = data_fake.whilem_c; | |
3400 | if ((flags & SCF_DO_SUBSTR) && data_fake.last_found) { | |
3401 | if (RExC_rx->minlen<*minnextp) | |
3402 | RExC_rx->minlen=*minnextp; | |
3403 | scan_commit(pRExC_state, &data_fake, minnextp); | |
3404 | SvREFCNT_dec(data_fake.last_found); | |
3405 | ||
3406 | if ( data_fake.minlen_fixed != minlenp ) | |
3407 | { | |
3408 | data->offset_fixed= data_fake.offset_fixed; | |
3409 | data->minlen_fixed= data_fake.minlen_fixed; | |
3410 | data->lookbehind_fixed+= scan->flags; | |
3411 | } | |
3412 | if ( data_fake.minlen_float != minlenp ) | |
3413 | { | |
3414 | data->minlen_float= data_fake.minlen_float; | |
3415 | data->offset_float_min=data_fake.offset_float_min; | |
3416 | data->offset_float_max=data_fake.offset_float_max; | |
3417 | data->lookbehind_float+= scan->flags; | |
3418 | } | |
3419 | } | |
3420 | } | |
3421 | ||
653099ff | 3422 | |
653099ff | 3423 | } |
1de06328 | 3424 | #endif |
a0ed51b3 LW |
3425 | } |
3426 | else if (OP(scan) == OPEN) { | |
c277df42 | 3427 | pars++; |
a0ed51b3 | 3428 | } |
cb434fcc | 3429 | else if (OP(scan) == CLOSE) { |
eb160463 | 3430 | if ((I32)ARG(scan) == is_par) { |
cb434fcc | 3431 | next = regnext(scan); |
c277df42 | 3432 | |
cb434fcc IZ |
3433 | if ( next && (OP(next) != WHILEM) && next < last) |
3434 | is_par = 0; /* Disable optimization */ | |
3435 | } | |
3436 | if (data) | |
3437 | *(data->last_closep) = ARG(scan); | |
a0ed51b3 LW |
3438 | } |
3439 | else if (OP(scan) == EVAL) { | |
c277df42 IZ |
3440 | if (data) |
3441 | data->flags |= SF_HAS_EVAL; | |
3442 | } | |
96776eda | 3443 | else if (OP(scan) == LOGICAL && scan->flags == 2) { /* Embedded follows */ |
0f5d15d6 | 3444 | if (flags & SCF_DO_SUBSTR) { |
1de06328 | 3445 | scan_commit(pRExC_state,data,minlenp); |
0f5d15d6 IZ |
3446 | data->longest = &(data->longest_float); |
3447 | } | |
3448 | is_inf = is_inf_internal = 1; | |
653099ff | 3449 | if (flags & SCF_DO_STCLASS_OR) /* Allow everything */ |
830247a4 | 3450 | cl_anything(pRExC_state, data->start_class); |
96776eda | 3451 | flags &= ~SCF_DO_STCLASS; |
0f5d15d6 | 3452 | } |
786e8c11 YO |
3453 | #ifdef TRIE_STUDY_OPT |
3454 | #ifdef FULL_TRIE_STUDY | |
3455 | else if (PL_regkind[OP(scan)] == TRIE) { | |
3456 | /* NOTE - There is similar code to this block above for handling | |
3457 | BRANCH nodes on the initial study. If you change stuff here | |
3458 | check there too. */ | |
3459 | regnode *tail= regnext(scan); | |
3460 | reg_trie_data *trie = (reg_trie_data*)RExC_rx->data->data[ ARG(scan) ]; | |
3461 | I32 max1 = 0, min1 = I32_MAX; | |
3462 | struct regnode_charclass_class accum; | |
3463 | ||
3464 | if (flags & SCF_DO_SUBSTR) /* XXXX Add !SUSPEND? */ | |
1de06328 | 3465 | scan_commit(pRExC_state, data,minlenp); /* Cannot merge strings after this. */ |
786e8c11 YO |
3466 | if (flags & SCF_DO_STCLASS) |
3467 | cl_init_zero(pRExC_state, &accum); | |
3468 | ||
3469 | if (!trie->jump) { | |
3470 | min1= trie->minlen; | |
3471 | max1= trie->maxlen; | |
3472 | } else { | |
3473 | const regnode *nextbranch= NULL; | |
3474 | U32 word; | |
3475 | ||
3476 | for ( word=1 ; word <= trie->wordcount ; word++) | |
3477 | { | |
3478 | I32 deltanext=0, minnext=0, f = 0, fake; | |
3479 | struct regnode_charclass_class this_class; | |
3480 | ||
3481 | data_fake.flags = 0; | |
3482 | if (data) { | |
3483 | data_fake.whilem_c = data->whilem_c; | |
3484 | data_fake.last_closep = data->last_closep; | |
3485 | } | |
3486 | else | |
3487 | data_fake.last_closep = &fake; | |
3488 | ||
3489 | if (flags & SCF_DO_STCLASS) { | |
3490 | cl_init(pRExC_state, &this_class); | |
3491 | data_fake.start_class = &this_class; | |
3492 | f = SCF_DO_STCLASS_AND; | |
3493 | } | |
3494 | if (flags & SCF_WHILEM_VISITED_POS) | |
3495 | f |= SCF_WHILEM_VISITED_POS; | |
3496 | ||
3497 | if (trie->jump[word]) { | |
3498 | if (!nextbranch) | |
3499 | nextbranch = tail - trie->jump[0]; | |
3500 | scan= tail - trie->jump[word]; | |
3501 | /* We go from the jump point to the branch that follows | |
3502 | it. Note this means we need the vestigal unused branches | |
3503 | even though they arent otherwise used. | |
3504 | */ | |
1de06328 | 3505 | minnext = study_chunk(pRExC_state, &scan, minlenp, &deltanext, |
786e8c11 YO |
3506 | (regnode *)nextbranch, &data_fake, f,depth+1); |
3507 | } | |
3508 | if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH) | |
3509 | nextbranch= regnext((regnode*)nextbranch); | |
3510 | ||
3511 | if (min1 > (I32)(minnext + trie->minlen)) | |
3512 | min1 = minnext + trie->minlen; | |
3513 | if (max1 < (I32)(minnext + deltanext + trie->maxlen)) | |
3514 | max1 = minnext + deltanext + trie->maxlen; | |
3515 | if (deltanext == I32_MAX) | |
3516 | is_inf = is_inf_internal = 1; | |
3517 | ||
3518 | if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) | |
3519 | pars++; | |
3520 | ||
3521 | if (data) { | |
3522 | if (data_fake.flags & SF_HAS_EVAL) | |
3523 | data->flags |= SF_HAS_EVAL; | |
3524 | data->whilem_c = data_fake.whilem_c; | |
3525 | } | |
3526 | if (flags & SCF_DO_STCLASS) | |
3527 | cl_or(pRExC_state, &accum, &this_class); | |
3528 | } | |
3529 | } | |
3530 | if (flags & SCF_DO_SUBSTR) { | |
3531 | data->pos_min += min1; | |
3532 | data->pos_delta += max1 - min1; | |
3533 | if (max1 != min1 || is_inf) | |
3534 | data->longest = &(data->longest_float); | |
3535 | } | |
3536 | min += min1; | |
3537 | delta += max1 - min1; | |
3538 | if (flags & SCF_DO_STCLASS_OR) { | |
3539 | cl_or(pRExC_state, data->start_class, &accum); | |
3540 | if (min1) { | |
3541 | cl_and(data->start_class, &and_with); | |
3542 | flags &= ~SCF_DO_STCLASS; | |
3543 | } | |
3544 | } | |
3545 | else if (flags & SCF_DO_STCLASS_AND) { | |
3546 | if (min1) { | |
3547 | cl_and(data->start_class, &accum); | |
3548 | flags &= ~SCF_DO_STCLASS; | |
3549 | } | |
3550 | else { | |
3551 | /* Switch to OR mode: cache the old value of | |
3552 | * data->start_class */ | |
3553 | StructCopy(data->start_class, &and_with, | |
3554 | struct regnode_charclass_class); | |
3555 | flags &= ~SCF_DO_STCLASS_AND; | |
3556 | StructCopy(&accum, data->start_class, | |
3557 | struct regnode_charclass_class); | |
3558 | flags |= SCF_DO_STCLASS_OR; | |
3559 | data->start_class->flags |= ANYOF_EOS; | |
3560 | } | |
3561 | } | |
3562 | scan= tail; | |
3563 | continue; | |
3564 | } | |
3565 | #else | |
3566 | else if (PL_regkind[OP(scan)] == TRIE) { | |
3567 | reg_trie_data *trie = (reg_trie_data*)RExC_rx->data->data[ ARG(scan) ]; | |
3568 | U8*bang=NULL; | |
3569 | ||
3570 | min += trie->minlen; | |
3571 | delta += (trie->maxlen - trie->minlen); | |
3572 | flags &= ~SCF_DO_STCLASS; /* xxx */ | |
3573 | if (flags & SCF_DO_SUBSTR) { | |
1de06328 | 3574 | scan_commit(pRExC_state,data,minlenp); /* Cannot expect anything... */ |
786e8c11 YO |
3575 | data->pos_min += trie->minlen; |
3576 | data->pos_delta += (trie->maxlen - trie->minlen); | |
3577 | if (trie->maxlen != trie->minlen) | |
3578 | data->longest = &(data->longest_float); | |
3579 | } | |
3580 | if (trie->jump) /* no more substrings -- for now /grr*/ | |
3581 | flags &= ~SCF_DO_SUBSTR; | |
3582 | } | |
3583 | #endif /* old or new */ | |
3584 | #endif /* TRIE_STUDY_OPT */ | |
c277df42 IZ |
3585 | /* Else: zero-length, ignore. */ |
3586 | scan = regnext(scan); | |
3587 | } | |
3588 | ||
3589 | finish: | |
3590 | *scanp = scan; | |
aca2d497 | 3591 | *deltap = is_inf_internal ? I32_MAX : delta; |
b81d288d | 3592 | if (flags & SCF_DO_SUBSTR && is_inf) |
c277df42 | 3593 | data->pos_delta = I32_MAX - data->pos_min; |
786e8c11 | 3594 | if (is_par > (I32)U8_MAX) |
c277df42 IZ |
3595 | is_par = 0; |
3596 | if (is_par && pars==1 && data) { | |
3597 | data->flags |= SF_IN_PAR; | |
3598 | data->flags &= ~SF_HAS_PAR; | |
a0ed51b3 LW |
3599 | } |
3600 | else if (pars && data) { | |
c277df42 IZ |
3601 | data->flags |= SF_HAS_PAR; |
3602 | data->flags &= ~SF_IN_PAR; | |
3603 | } | |
653099ff GS |
3604 | if (flags & SCF_DO_STCLASS_OR) |
3605 | cl_and(data->start_class, &and_with); | |
786e8c11 YO |
3606 | if (flags & SCF_TRIE_RESTUDY) |
3607 | data->flags |= SCF_TRIE_RESTUDY; | |
1de06328 YO |
3608 | |
3609 | DEBUG_STUDYDATA(data,depth); | |
3610 | ||
c277df42 IZ |
3611 | return min; |
3612 | } | |
3613 | ||
76e3520e | 3614 | STATIC I32 |
5f66b61c | 3615 | S_add_data(RExC_state_t *pRExC_state, I32 n, const char *s) |
c277df42 | 3616 | { |
830247a4 | 3617 | if (RExC_rx->data) { |
b81d288d AB |
3618 | Renewc(RExC_rx->data, |
3619 | sizeof(*RExC_rx->data) + sizeof(void*) * (RExC_rx->data->count + n - 1), | |
c277df42 | 3620 | char, struct reg_data); |
830247a4 IZ |
3621 | Renew(RExC_rx->data->what, RExC_rx->data->count + n, U8); |
3622 | RExC_rx->data->count += n; | |
a0ed51b3 LW |
3623 | } |
3624 | else { | |
a02a5408 | 3625 | Newxc(RExC_rx->data, sizeof(*RExC_rx->data) + sizeof(void*) * (n - 1), |
c277df42 | 3626 | char, struct reg_data); |
a02a5408 | 3627 | Newx(RExC_rx->data->what, n, U8); |
830247a4 | 3628 | RExC_rx->data->count = n; |
c277df42 | 3629 | } |
830247a4 IZ |
3630 | Copy(s, RExC_rx->data->what + RExC_rx->data->count - n, n, U8); |
3631 | return RExC_rx->data->count - n; | |
c277df42 IZ |
3632 | } |
3633 | ||
76234dfb | 3634 | #ifndef PERL_IN_XSUB_RE |
d88dccdf | 3635 | void |
864dbfa3 | 3636 | Perl_reginitcolors(pTHX) |
d88dccdf | 3637 | { |
97aff369 | 3638 | dVAR; |
1df70142 | 3639 | const char * const s = PerlEnv_getenv("PERL_RE_COLORS"); |
d88dccdf | 3640 | if (s) { |
1df70142 AL |
3641 | char *t = savepv(s); |
3642 | int i = 0; | |
3643 | PL_colors[0] = t; | |
d88dccdf | 3644 | while (++i < 6) { |
1df70142 AL |
3645 | t = strchr(t, '\t'); |
3646 | if (t) { | |
3647 | *t = '\0'; | |
3648 | PL_colors[i] = ++t; | |
d88dccdf IZ |
3649 | } |
3650 | else | |
1df70142 | 3651 | PL_colors[i] = t = (char *)""; |
d88dccdf IZ |
3652 | } |
3653 | } else { | |
1df70142 | 3654 | int i = 0; |
b81d288d | 3655 | while (i < 6) |
06b5626a | 3656 | PL_colors[i++] = (char *)""; |
d88dccdf IZ |
3657 | } |
3658 | PL_colorset = 1; | |
3659 | } | |
76234dfb | 3660 | #endif |
8615cb43 | 3661 | |
07be1b83 | 3662 | |
786e8c11 YO |
3663 | #ifdef TRIE_STUDY_OPT |
3664 | #define CHECK_RESTUDY_GOTO \ | |
3665 | if ( \ | |
3666 | (data.flags & SCF_TRIE_RESTUDY) \ | |
3667 | && ! restudied++ \ | |
3668 | ) goto reStudy | |
3669 | #else | |
3670 | #define CHECK_RESTUDY_GOTO | |
3671 | #endif | |
a687059c | 3672 | /* |
e50aee73 | 3673 | - pregcomp - compile a regular expression into internal code |
a687059c LW |
3674 | * |
3675 | * We can't allocate space until we know how big the compiled form will be, | |
3676 | * but we can't compile it (and thus know how big it is) until we've got a | |
3677 | * place to put the code. So we cheat: we compile it twice, once with code | |
3678 | * generation turned off and size counting turned on, and once "for real". | |
3679 | * This also means that we don't allocate space until we are sure that the | |
3680 | * thing really will compile successfully, and we never have to move the | |
3681 | * code and thus invalidate pointers into it. (Note that it has to be in | |
3682 | * one piece because free() must be able to free it all.) [NB: not true in perl] | |
3683 | * | |
3684 | * Beware that the optimization-preparation code in here knows about some | |
3685 | * of the structure of the compiled regexp. [I'll say.] | |
3686 | */ | |
3687 | regexp * | |
864dbfa3 | 3688 | Perl_pregcomp(pTHX_ char *exp, char *xend, PMOP *pm) |
a687059c | 3689 | { |
97aff369 | 3690 | dVAR; |
a0d0e21e | 3691 | register regexp *r; |
c277df42 | 3692 | regnode *scan; |
c277df42 | 3693 | regnode *first; |
a0d0e21e | 3694 | I32 flags; |
a0d0e21e LW |
3695 | I32 minlen = 0; |
3696 | I32 sawplus = 0; | |
3697 | I32 sawopen = 0; | |
2c2d71f5 | 3698 | scan_data_t data; |
830247a4 | 3699 | RExC_state_t RExC_state; |
be8e71aa | 3700 | RExC_state_t * const pRExC_state = &RExC_state; |
07be1b83 YO |
3701 | #ifdef TRIE_STUDY_OPT |
3702 | int restudied= 0; | |
3703 | RExC_state_t copyRExC_state; | |
3704 | #endif | |
a0d0e21e | 3705 | |
a3621e74 YO |
3706 | GET_RE_DEBUG_FLAGS_DECL; |
3707 | ||
a0d0e21e | 3708 | if (exp == NULL) |
c277df42 | 3709 | FAIL("NULL regexp argument"); |
a0d0e21e | 3710 | |
a5961de5 | 3711 | RExC_utf8 = pm->op_pmdynflags & PMdf_CMP_UTF8; |
a0ed51b3 | 3712 | |
5cfc7842 | 3713 | RExC_precomp = exp; |
a3621e74 YO |
3714 | DEBUG_r(if (!PL_colorset) reginitcolors()); |
3715 | DEBUG_COMPILE_r({ | |
ab3bbdeb YO |
3716 | SV *dsv= sv_newmortal(); |
3717 | RE_PV_QUOTED_DECL(s, RExC_utf8, | |
3718 | dsv, RExC_precomp, (xend - exp), 60); | |
3719 | PerlIO_printf(Perl_debug_log, "%sCompiling REx%s %s\n", | |
3720 | PL_colors[4],PL_colors[5],s); | |
a5961de5 | 3721 | }); |
e2509266 | 3722 | RExC_flags = pm->op_pmflags; |
830247a4 | 3723 | RExC_sawback = 0; |
bbce6d69 | 3724 | |
830247a4 IZ |
3725 | RExC_seen = 0; |
3726 | RExC_seen_zerolen = *exp == '^' ? -1 : 0; | |
3727 | RExC_seen_evals = 0; | |
3728 | RExC_extralen = 0; | |
c277df42 | 3729 | |
bbce6d69 | 3730 | /* First pass: determine size, legality. */ |
830247a4 | 3731 | RExC_parse = exp; |
fac92740 | 3732 | RExC_start = exp; |
830247a4 IZ |
3733 | RExC_end = xend; |
3734 | RExC_naughty = 0; | |
3735 | RExC_npar = 1; | |
3736 | RExC_size = 0L; | |
3737 | RExC_emit = &PL_regdummy; | |
3738 | RExC_whilem_seen = 0; | |
fc8cd66c YO |
3739 | RExC_charnames = NULL; |
3740 | ||
85ddcde9 JH |
3741 | #if 0 /* REGC() is (currently) a NOP at the first pass. |
3742 | * Clever compilers notice this and complain. --jhi */ | |
830247a4 | 3743 | REGC((U8)REG_MAGIC, (char*)RExC_emit); |
85ddcde9 | 3744 | #endif |
3dab1dad YO |
3745 | DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "Starting first pass (sizing)\n")); |
3746 | if (reg(pRExC_state, 0, &flags,1) == NULL) { | |
c445ea15 | 3747 | RExC_precomp = NULL; |
a0d0e21e LW |
3748 | return(NULL); |
3749 | } | |
3dab1dad YO |
3750 | DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "Required ")); |
3751 | DEBUG_COMPILE_r(PerlIO_printf(Perl_debug_log, "size %"IVdf" nodes ", (IV)RExC_size)); | |
3752 | DEBUG_PARSE_r(PerlIO_printf(Perl_debug_log, "\nStarting second pass (creation)\n")); | |
07be1b83 YO |
3753 | DEBUG_PARSE_r({ |
3754 | RExC_lastnum=0; | |
3755 | RExC_lastparse=NULL; | |
3756 | }); | |
c277df42 | 3757 | |
07be1b83 | 3758 | |
c277df42 IZ |
3759 | /* Small enough for pointer-storage convention? |
3760 | If extralen==0, this means that we will not need long jumps. */ | |
830247a4 IZ |
3761 | if (RExC_size >= 0x10000L && RExC_extralen) |
3762 | RExC_size += RExC_extralen; | |
c277df42 | 3763 | else |
830247a4 IZ |
3764 | RExC_extralen = 0; |
3765 | if (RExC_whilem_seen > 15) | |
3766 | RExC_whilem_seen = 15; | |
a0d0e21e | 3767 | |
bbce6d69 | 3768 | /* Allocate space and initialize. */ |
a02a5408 | 3769 | Newxc(r, sizeof(regexp) + (unsigned)RExC_size * sizeof(regnode), |
c277df42 | 3770 | char, regexp); |
a0d0e21e | 3771 | if (r == NULL) |
b45f050a JF |
3772 | FAIL("Regexp out of space"); |
3773 | ||
0f79a09d GS |
3774 | #ifdef DEBUGGING |
3775 | /* avoid reading uninitialized memory in DEBUGGING code in study_chunk() */ | |
830247a4 | 3776 | Zero(r, sizeof(regexp) + (unsigned)RExC_size * sizeof(regnode), char); |
0f79a09d | 3777 | #endif |
c277df42 | 3778 | r->refcnt = 1; |
bbce6d69 | 3779 | r->prelen = xend - exp; |
5cfc7842 | 3780 | r->precomp = savepvn(RExC_precomp, r->prelen); |
cf93c79d | 3781 | r->subbeg = NULL; |
f8c7b90f | 3782 | #ifdef PERL_OLD_COPY_ON_WRITE |
c445ea15 | 3783 | r->saved_copy = NULL; |
ed252734 | 3784 | #endif |
cf93c79d | 3785 | r->reganch = pm->op_pmflags & PMf_COMPILETIME; |
830247a4 | 3786 | r->nparens = RExC_npar - 1; /* set early to validate backrefs */ |
38d1b06f | 3787 | r->lastparen = 0; /* mg.c reads this. */ |
4327152a IZ |
3788 | |
3789 | r->substrs = 0; /* Useful during FAIL. */ | |
3790 | r->startp = 0; /* Useful during FAIL. */ | |
3791 | r->endp = 0; /* Useful during FAIL. */ | |
3792 | ||
a02a5408 | 3793 | Newxz(r->offsets, 2*RExC_size+1, U32); /* MJD 20001228 */ |
fac92740 | 3794 | if (r->offsets) { |
2af232bd | 3795 | r->offsets[0] = RExC_size; |
fac92740 | 3796 | } |
a3621e74 | 3797 | DEBUG_OFFSETS_r(PerlIO_printf(Perl_debug_log, |
2af232bd SS |
3798 | "%s %"UVuf" bytes for offset annotations.\n", |
3799 | r->offsets ? "Got" : "Couldn't get", | |
392fbf5d | 3800 | (UV)((2*RExC_size+1) * sizeof(U32)))); |
fac92740 | 3801 | |
830247a4 | 3802 | RExC_rx = r; |
bbce6d69 | 3803 | |
3804 | /* Second pass: emit code. */ | |
e2509266 | 3805 | RExC_flags = pm->op_pmflags; /* don't let top level (?i) bleed */ |
830247a4 IZ |
3806 | RExC_parse = exp; |
3807 | RExC_end = xend; | |
3808 | RExC_naughty = 0; | |
3809 | RExC_npar = 1; | |
fac92740 | 3810 | RExC_emit_start = r->program; |
830247a4 | 3811 | RExC_emit = r->program; |
2cd61cdb | 3812 | /* Store the count of eval-groups for security checks: */ |
786e8c11 | 3813 | RExC_emit->next_off = (RExC_seen_evals > (I32)U16_MAX) ? U16_MAX : (U16)RExC_seen_evals; |
830247a4 | 3814 | REGC((U8)REG_MAGIC, (char*) RExC_emit++); |
c277df42 | 3815 | r->data = 0; |
3dab1dad | 3816 | if (reg(pRExC_state, 0, &flags,1) == NULL) |
a0d0e21e | 3817 | return(NULL); |
07be1b83 YO |
3818 | /* XXXX To minimize changes to RE engine we always allocate |
3819 | 3-units-long substrs field. */ | |
3820 | Newx(r->substrs, 1, struct reg_substr_data); | |
a0d0e21e | 3821 | |
07be1b83 | 3822 | reStudy: |
1de06328 | 3823 | r->minlen = minlen = sawplus = sawopen = 0; |
07be1b83 YO |
3824 | Zero(r->substrs, 1, struct reg_substr_data); |
3825 | StructCopy(&zero_scan_data, &data, scan_data_t); | |
a3621e74 | 3826 | |
07be1b83 YO |
3827 | #ifdef TRIE_STUDY_OPT |
3828 | if ( restudied ) { | |
3829 | DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log,"Restudying\n")); | |
3830 | RExC_state=copyRExC_state; | |
1de06328 | 3831 | if (data.last_found) { |
07be1b83 | 3832 | SvREFCNT_dec(data.longest_fixed); |
07be1b83 | 3833 | SvREFCNT_dec(data.longest_float); |
07be1b83 | 3834 | SvREFCNT_dec(data.last_found); |
1de06328 | 3835 | } |
07be1b83 YO |
3836 | } else { |
3837 | copyRExC_state=RExC_state; | |
3838 | } | |
3839 | #endif | |
fc8cd66c | 3840 | |
a0d0e21e | 3841 | /* Dig out information for optimizations. */ |
cf93c79d | 3842 | r->reganch = pm->op_pmflags & PMf_COMPILETIME; /* Again? */ |
e2509266 | 3843 | pm->op_pmflags = RExC_flags; |
a0ed51b3 | 3844 | if (UTF) |
5ff6fc6d | 3845 | r->reganch |= ROPT_UTF8; /* Unicode in it? */ |
c277df42 | 3846 | r->regstclass = NULL; |
830247a4 | 3847 | if (RExC_naughty >= 10) /* Probably an expensive pattern. */ |
a0ed51b3 | 3848 | r->reganch |= ROPT_NAUGHTY; |
c277df42 | 3849 | scan = r->program + 1; /* First BRANCH. */ |
2779dcf1 | 3850 | |
1de06328 YO |
3851 | /* testing for BRANCH here tells us whether there is "must appear" |
3852 | data in the pattern. If there is then we can use it for optimisations */ | |
c277df42 | 3853 | if (OP(scan) != BRANCH) { /* Only one top-level choice. */ |
c277df42 | 3854 | I32 fake; |
c5254dd6 | 3855 | STRLEN longest_float_length, longest_fixed_length; |
07be1b83 | 3856 | struct regnode_charclass_class ch_class; /* pointed to by data */ |
653099ff | 3857 | int stclass_flag; |
07be1b83 | 3858 | I32 last_close = 0; /* pointed to by data */ |
a0d0e21e LW |
3859 | |
3860 | first = scan; | |
c277df42 | 3861 | /* Skip introductions and multiplicators >= 1. */ |
a0d0e21e | 3862 | while ((OP(first) == OPEN && (sawopen = 1)) || |
653099ff | 3863 | /* An OR of *one* alternative - should not happen now. */ |
a0d0e21e | 3864 | (OP(first) == BRANCH && OP(regnext(first)) != BRANCH) || |
07be1b83 YO |
3865 | /* for now we can't handle lookbehind IFMATCH*/ |
3866 | (OP(first) == IFMATCH && !first->flags) || | |
a0d0e21e LW |
3867 | (OP(first) == PLUS) || |
3868 | (OP(first) == MINMOD) || | |
653099ff | 3869 | /* An {n,m} with n>0 */ |
07be1b83 YO |
3870 | (PL_regkind[OP(first)] == CURLY && ARG1(first) > 0) ) |
3871 | { | |
786e8c11 | 3872 | |
a0d0e21e LW |
3873 | if (OP(first) == PLUS) |
3874 | sawplus = 1; | |
3875 | else | |
3dab1dad | 3876 | first += regarglen[OP(first)]; |
07be1b83 YO |
3877 | if (OP(first) == IFMATCH) { |
3878 | first = NEXTOPER(first); | |
3879 | first += EXTRA_STEP_2ARGS; | |
7c167cea | 3880 | } else /* XXX possible optimisation for /(?=)/ */ |
07be1b83 | 3881 | first = NEXTOPER(first); |
a687059c LW |
3882 | } |
3883 | ||
a0d0e21e LW |
3884 | /* Starting-point info. */ |
3885 | again: | |
786e8c11 | 3886 | DEBUG_PEEP("first:",first,0); |
07be1b83 | 3887 | /* Ignore EXACT as we deal with it later. */ |
3dab1dad | 3888 | if (PL_regkind[OP(first)] == EXACT) { |
1aa99e6b | 3889 | if (OP(first) == EXACT) |
6f207bd3 | 3890 | NOOP; /* Empty, get anchored substr later. */ |
1aa99e6b | 3891 | else if ((OP(first) == EXACTF || OP(first) == EXACTFL)) |
b3c9acc1 IZ |
3892 | r->regstclass = first; |
3893 | } | |
07be1b83 | 3894 | #ifdef TRIE_STCLASS |
786e8c11 | 3895 | else if (PL_regkind[OP(first)] == TRIE && |
07be1b83 YO |
3896 | ((reg_trie_data *)r->data->data[ ARG(first) ])->minlen>0) |
3897 | { | |
786e8c11 | 3898 | regnode *trie_op; |
07be1b83 | 3899 | /* this can happen only on restudy */ |
786e8c11 YO |
3900 | if ( OP(first) == TRIE ) { |
3901 | struct regnode_1 *trieop; | |
3902 | Newxz(trieop,1,struct regnode_1); | |
3903 | StructCopy(first,trieop,struct regnode_1); | |
3904 | trie_op=(regnode *)trieop; | |
3905 | } else { | |
3906 | struct regnode_charclass *trieop; | |
3907 | Newxz(trieop,1,struct regnode_charclass); | |
3908 | StructCopy(first,trieop,struct regnode_charclass); | |
3909 | trie_op=(regnode *)trieop; | |
3910 | } | |
1de06328 | 3911 | OP(trie_op)+=2; |
786e8c11 YO |
3912 | make_trie_failtable(pRExC_state, (regnode *)first, trie_op, 0); |
3913 | r->regstclass = trie_op; | |
07be1b83 YO |
3914 | } |
3915 | #endif | |
bfed75c6 | 3916 | else if (strchr((const char*)PL_simple,OP(first))) |
a0d0e21e | 3917 | r->regstclass = first; |
3dab1dad YO |
3918 | else if (PL_regkind[OP(first)] == BOUND || |
3919 | PL_regkind[OP(first)] == NBOUND) | |
a0d0e21e | 3920 | r->regstclass = first; |
3dab1dad | 3921 | else if (PL_regkind[OP(first)] == BOL) { |
cad2e5aa JH |
3922 | r->reganch |= (OP(first) == MBOL |
3923 | ? ROPT_ANCH_MBOL | |
3924 | : (OP(first) == SBOL | |
3925 | ? ROPT_ANCH_SBOL | |
3926 | : ROPT_ANCH_BOL)); | |
a0d0e21e | 3927 | first = NEXTOPER(first); |
774d564b | 3928 | goto again; |
3929 | } | |
3930 | else if (OP(first) == GPOS) { | |
3931 | r->reganch |= ROPT_ANCH_GPOS; | |
3932 | first = NEXTOPER(first); | |
3933 | goto again; | |
a0d0e21e | 3934 | } |
e09294f4 | 3935 | else if (!sawopen && (OP(first) == STAR && |
3dab1dad | 3936 | PL_regkind[OP(NEXTOPER(first))] == REG_ANY) && |
a0d0e21e LW |
3937 | !(r->reganch & ROPT_ANCH) ) |
3938 | { | |
3939 | /* turn .* into ^.* with an implied $*=1 */ | |
1df70142 AL |
3940 | const int type = |
3941 | (OP(NEXTOPER(first)) == REG_ANY) | |
3942 | ? ROPT_ANCH_MBOL | |
3943 | : ROPT_ANCH_SBOL; | |
cad2e5aa | 3944 | r->reganch |= type | ROPT_IMPLICIT; |
a0d0e21e | 3945 | first = NEXTOPER(first); |
774d564b | 3946 | goto again; |
a0d0e21e | 3947 | } |
b81d288d | 3948 | if (sawplus && (!sawopen || !RExC_sawback) |
830247a4 | 3949 | && !(RExC_seen & REG_SEEN_EVAL)) /* May examine pos and $& */ |
cad2e5aa JH |
3950 | /* x+ must match at the 1st pos of run of x's */ |
3951 | r->reganch |= ROPT_SKIP; | |
a0d0e21e | 3952 | |
c277df42 | 3953 | /* Scan is after the zeroth branch, first is atomic matcher. */ |
be8e71aa YO |
3954 | #ifdef TRIE_STUDY_OPT |
3955 | DEBUG_COMPILE_r( | |
3956 | if (!restudied) | |
3957 | PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n", | |
3958 | (IV)(first - scan + 1)) | |
3959 | ); | |
3960 | #else | |
3961 | DEBUG_COMPILE_r( | |
3962 | PerlIO_printf(Perl_debug_log, "first at %"IVdf"\n", | |
3963 | (IV)(first - scan + 1)) | |
3964 | ); | |
3965 | #endif | |
3966 | ||
3967 | ||
a0d0e21e LW |
3968 | /* |
3969 | * If there's something expensive in the r.e., find the | |
3970 | * longest literal string that must appear and make it the | |
3971 | * regmust. Resolve ties in favor of later strings, since | |
3972 | * the regstart check works with the beginning of the r.e. | |
3973 | * and avoiding duplication strengthens checking. Not a | |
3974 | * strong reason, but sufficient in the absence of others. | |
3975 | * [Now we resolve ties in favor of the earlier string if | |
c277df42 | 3976 | * it happens that c_offset_min has been invalidated, since the |
a0d0e21e LW |
3977 | * earlier string may buy us something the later one won't.] |
3978 | */ | |
a0d0e21e | 3979 | minlen = 0; |
a687059c | 3980 | |
396482e1 GA |
3981 | data.longest_fixed = newSVpvs(""); |
3982 | data.longest_float = newSVpvs(""); | |
3983 | data.last_found = newSVpvs(""); | |
c277df42 IZ |
3984 | data.longest = &(data.longest_fixed); |
3985 | first = scan; | |
653099ff | 3986 | if (!r->regstclass) { |
830247a4 | 3987 | cl_init(pRExC_state, &ch_class); |
653099ff GS |
3988 | data.start_class = &ch_class; |
3989 | stclass_flag = SCF_DO_STCLASS_AND; | |
3990 | } else /* XXXX Check for BOUND? */ | |
3991 | stclass_flag = 0; | |
cb434fcc | 3992 | data.last_closep = &last_close; |
653099ff | 3993 | |
1de06328 | 3994 | minlen = study_chunk(pRExC_state, &first, &minlen, &fake, scan + RExC_size, /* Up to end */ |
a3621e74 | 3995 | &data, SCF_DO_SUBSTR | SCF_WHILEM_VISITED_POS | stclass_flag,0); |
07be1b83 | 3996 | |
07be1b83 | 3997 | |
786e8c11 YO |
3998 | CHECK_RESTUDY_GOTO; |
3999 | ||
4000 | ||
830247a4 | 4001 | if ( RExC_npar == 1 && data.longest == &(data.longest_fixed) |
b81d288d | 4002 | && data.last_start_min == 0 && data.last_end > 0 |
830247a4 IZ |
4003 | && !RExC_seen_zerolen |
4004 | && (!(RExC_seen & REG_SEEN_GPOS) || (r->reganch & ROPT_ANCH_GPOS))) | |
c277df42 | 4005 | r->reganch |= ROPT_CHECK_ALL; |
1de06328 | 4006 | scan_commit(pRExC_state, &data,&minlen); |
c277df42 IZ |
4007 | SvREFCNT_dec(data.last_found); |
4008 | ||
1de06328 YO |
4009 | /* Note that code very similar to this but for anchored string |
4010 | follows immediately below, changes may need to be made to both. | |
4011 | Be careful. | |
4012 | */ | |
a0ed51b3 | 4013 | longest_float_length = CHR_SVLEN(data.longest_float); |
c5254dd6 | 4014 | if (longest_float_length |
c277df42 IZ |
4015 | || (data.flags & SF_FL_BEFORE_EOL |
4016 | && (!(data.flags & SF_FL_BEFORE_MEOL) | |
1de06328 YO |
4017 | || (RExC_flags & PMf_MULTILINE)))) |
4018 | { | |
1182767e | 4019 | I32 t,ml; |
cf93c79d | 4020 | |
1de06328 | 4021 | if (SvCUR(data.longest_fixed) /* ok to leave SvCUR */ |
aca2d497 IZ |
4022 | && data.offset_fixed == data.offset_float_min |
4023 | && SvCUR(data.longest_fixed) == SvCUR(data.longest_float)) | |
4024 | goto remove_float; /* As in (a)+. */ | |
4025 | ||
1de06328 YO |
4026 | /* copy the information about the longest float from the reg_scan_data |
4027 | over to the program. */ | |
33b8afdf JH |
4028 | if (SvUTF8(data.longest_float)) { |
4029 | r->float_utf8 = data.longest_float; | |
c445ea15 | 4030 | r->float_substr = NULL; |
33b8afdf JH |
4031 | } else { |
4032 | r->float_substr = data.longest_float; | |
c445ea15 | 4033 | r->float_utf8 = NULL; |
33b8afdf | 4034 | } |
1de06328 YO |
4035 | /* float_end_shift is how many chars that must be matched that |
4036 | follow this item. We calculate it ahead of time as once the | |
4037 | lookbehind offset is added in we lose the ability to correctly | |
4038 | calculate it.*/ | |
4039 | ml = data.minlen_float ? *(data.minlen_float) | |
1182767e | 4040 | : (I32)longest_float_length; |
1de06328 YO |
4041 | r->float_end_shift = ml - data.offset_float_min |
4042 | - longest_float_length + (SvTAIL(data.longest_float) != 0) | |
4043 | + data.lookbehind_float; | |
4044 | r->float_min_offset = data.offset_float_min - data.lookbehind_float; | |
c277df42 | 4045 | r->float_max_offset = data.offset_float_max; |
1182767e | 4046 | if (data.offset_float_max < I32_MAX) /* Don't offset infinity */ |
1de06328 YO |
4047 | r->float_max_offset -= data.lookbehind_float; |
4048 | ||
cf93c79d IZ |
4049 | t = (data.flags & SF_FL_BEFORE_EOL /* Can't have SEOL and MULTI */ |
4050 | && (!(data.flags & SF_FL_BEFORE_MEOL) | |
e2509266 | 4051 | || (RExC_flags & PMf_MULTILINE))); |
33b8afdf | 4052 | fbm_compile(data.longest_float, t ? FBMcf_TAIL : 0); |
a0ed51b3 LW |
4053 | } |
4054 | else { | |
aca2d497 | 4055 | remove_float: |
c445ea15 | 4056 | r->float_substr = r->float_utf8 = NULL; |
c277df42 | 4057 | SvREFCNT_dec(data.longest_float); |
c5254dd6 | 4058 | longest_float_length = 0; |
a0d0e21e | 4059 | } |
c277df42 | 4060 | |
1de06328 YO |
4061 | /* Note that code very similar to this but for floating string |
4062 | is immediately above, changes may need to be made to both. | |
4063 | Be careful. | |
4064 | */ | |
a0ed51b3 | 4065 | longest_fixed_length = CHR_SVLEN(data.longest_fixed); |
c5254dd6 | 4066 | if (longest_fixed_length |
c277df42 IZ |
4067 | || (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */ |
4068 | && (!(data.flags & SF_FIX_BEFORE_MEOL) | |
1de06328 YO |
4069 | || (RExC_flags & PMf_MULTILINE)))) |
4070 | { | |
1182767e | 4071 | I32 t,ml; |
cf93c79d | 4072 | |
1de06328 YO |
4073 | /* copy the information about the longest fixed |
4074 | from the reg_scan_data over to the program. */ | |
33b8afdf JH |
4075 | if (SvUTF8(data.longest_fixed)) { |
4076 | r->anchored_utf8 = data.longest_fixed; | |
c445ea15 | 4077 | r->anchored_substr = NULL; |
33b8afdf JH |
4078 | } else { |
4079 | r->anchored_substr = data.longest_fixed; | |
c445ea15 | 4080 | r->anchored_utf8 = NULL; |
33b8afdf | 4081 | } |
1de06328 YO |
4082 | /* fixed_end_shift is how many chars that must be matched that |
4083 | follow this item. We calculate it ahead of time as once the | |
4084 | lookbehind offset is added in we lose the ability to correctly | |
4085 | calculate it.*/ | |
4086 | ml = data.minlen_fixed ? *(data.minlen_fixed) | |
1182767e | 4087 | : (I32)longest_fixed_length; |
1de06328 YO |
4088 | r->anchored_end_shift = ml - data.offset_fixed |
4089 | - longest_fixed_length + (SvTAIL(data.longest_fixed) != 0) | |
4090 | + data.lookbehind_fixed; | |
4091 | r->anchored_offset = data.offset_fixed - data.lookbehind_fixed; | |
4092 | ||
cf93c79d IZ |
4093 | t = (data.flags & SF_FIX_BEFORE_EOL /* Can't have SEOL and MULTI */ |
4094 | && (!(data.flags & SF_FIX_BEFORE_MEOL) | |
e2509266 | 4095 | || (RExC_flags & PMf_MULTILINE))); |
33b8afdf | 4096 | fbm_compile(data.longest_fixed, t ? FBMcf_TAIL : 0); |
a0ed51b3 LW |
4097 | } |
4098 | else { | |
c445ea15 | 4099 | r->anchored_substr = r->anchored_utf8 = NULL; |
c277df42 | 4100 | SvREFCNT_dec(data.longest_fixed); |
c5254dd6 | 4101 | longest_fixed_length = 0; |
a0d0e21e | 4102 | } |
b81d288d | 4103 | if (r->regstclass |
ffc61ed2 | 4104 | && (OP(r->regstclass) == REG_ANY || OP(r->regstclass) == SANY)) |
653099ff | 4105 | r->regstclass = NULL; |
33b8afdf JH |
4106 | if ((!(r->anchored_substr || r->anchored_utf8) || r->anchored_offset) |
4107 | && stclass_flag | |
653099ff | 4108 | && !(data.start_class->flags & ANYOF_EOS) |
eb160463 GS |
4109 | && !cl_is_anything(data.start_class)) |
4110 | { | |
1df70142 | 4111 | const I32 n = add_data(pRExC_state, 1, "f"); |
653099ff | 4112 | |
a02a5408 | 4113 | Newx(RExC_rx->data->data[n], 1, |
653099ff GS |
4114 | struct regnode_charclass_class); |
4115 | StructCopy(data.start_class, | |
830247a4 | 4116 | (struct regnode_charclass_class*)RExC_rx->data->data[n], |
653099ff | 4117 | struct regnode_charclass_class); |
830247a4 | 4118 | r->regstclass = (regnode*)RExC_rx->data->data[n]; |
653099ff | 4119 | r->reganch &= ~ROPT_SKIP; /* Used in find_byclass(). */ |
a3621e74 | 4120 | DEBUG_COMPILE_r({ SV *sv = sv_newmortal(); |
32fc9b6a | 4121 | regprop(r, sv, (regnode*)data.start_class); |
9c5ffd7c | 4122 | PerlIO_printf(Perl_debug_log, |
a0288114 | 4123 | "synthetic stclass \"%s\".\n", |
3f7c398e | 4124 | SvPVX_const(sv));}); |
653099ff | 4125 | } |
c277df42 IZ |
4126 | |
4127 | /* A temporary algorithm prefers floated substr to fixed one to dig more info. */ | |
c5254dd6 | 4128 | if (longest_fixed_length > longest_float_length) { |
1de06328 | 4129 | r->check_end_shift = r->anchored_end_shift; |
c277df42 | 4130 | r->check_substr = r->anchored_substr; |
33b8afdf | 4131 | r->check_utf8 = r->anchored_utf8; |
c277df42 IZ |
4132 | r->check_offset_min = r->check_offset_max = r->anchored_offset; |
4133 | if (r->reganch & ROPT_ANCH_SINGLE) | |
4134 | r->reganch |= ROPT_NOSCAN; | |
a0ed51b3 LW |
4135 | } |
4136 | else { | |
1de06328 | 4137 | r->check_end_shift = r->float_end_shift; |
c277df42 | 4138 | r->check_substr = r->float_substr; |
33b8afdf | 4139 | r->check_utf8 = r->float_utf8; |
1de06328 YO |
4140 | r->check_offset_min = r->float_min_offset; |
4141 | r->check_offset_max = r->float_max_offset; | |
a0d0e21e | 4142 | } |
30382c73 IZ |
4143 | /* XXXX Currently intuiting is not compatible with ANCH_GPOS. |
4144 | This should be changed ASAP! */ | |
33b8afdf | 4145 | if ((r->check_substr || r->check_utf8) && !(r->reganch & ROPT_ANCH_GPOS)) { |
cad2e5aa | 4146 | r->reganch |= RE_USE_INTUIT; |
33b8afdf | 4147 | if (SvTAIL(r->check_substr ? r->check_substr : r->check_utf8)) |
cad2e5aa JH |
4148 | r->reganch |= RE_INTUIT_TAIL; |
4149 | } | |
1de06328 YO |
4150 | /* XXX Unneeded? dmq (shouldn't as this is handled elsewhere) |
4151 | if ( (STRLEN)minlen < longest_float_length ) | |
4152 | minlen= longest_float_length; | |
4153 | if ( (STRLEN)minlen < longest_fixed_length ) | |
4154 | minlen= longest_fixed_length; | |
4155 | */ | |
a0ed51b3 LW |
4156 | } |
4157 | else { | |
c277df42 IZ |
4158 | /* Several toplevels. Best we can is to set minlen. */ |
4159 | I32 fake; | |
653099ff | 4160 | struct regnode_charclass_class ch_class; |
cb434fcc | 4161 | I32 last_close = 0; |
c277df42 | 4162 | |
a3621e74 | 4163 | DEBUG_COMPILE_r(PerlIO_printf(Perl_debug_log, "\n")); |
07be1b83 | 4164 | |
c277df42 | 4165 | scan = r->program + 1; |
830247a4 | 4166 | cl_init(pRExC_state, &ch_class); |
653099ff | 4167 | data.start_class = &ch_class; |
cb434fcc | 4168 | data.last_closep = &last_close; |
07be1b83 | 4169 | |
1de06328 | 4170 | minlen = study_chunk(pRExC_state, &scan, &minlen, &fake, scan + RExC_size, |
07be1b83 YO |
4171 | &data, SCF_DO_STCLASS_AND|SCF_WHILEM_VISITED_POS,0); |
4172 | ||
786e8c11 | 4173 | CHECK_RESTUDY_GOTO; |
07be1b83 | 4174 | |
33b8afdf | 4175 | r->check_substr = r->check_utf8 = r->anchored_substr = r->anchored_utf8 |
c445ea15 | 4176 | = r->float_substr = r->float_utf8 = NULL; |
653099ff | 4177 | if (!(data.start_class->flags & ANYOF_EOS) |
eb160463 GS |
4178 | && !cl_is_anything(data.start_class)) |
4179 | { | |
1df70142 | 4180 | const I32 n = add_data(pRExC_state, 1, "f"); |
653099ff | 4181 | |
a02a5408 | 4182 | Newx(RExC_rx->data->data[n], 1, |
653099ff GS |
4183 | struct regnode_charclass_class); |
4184 | StructCopy(data.start_class, | |
830247a4 | 4185 | (struct regnode_charclass_class*)RExC_rx->data->data[n], |
653099ff | 4186 | struct regnode_charclass_class); |
830247a4 | 4187 | r->regstclass = (regnode*)RExC_rx->data->data[n]; |
653099ff | 4188 | r->reganch &= ~ROPT_SKIP; /* Used in find_byclass(). */ |
a3621e74 | 4189 | DEBUG_COMPILE_r({ SV* sv = sv_newmortal(); |
32fc9b6a | 4190 | regprop(r, sv, (regnode*)data.start_class); |
9c5ffd7c | 4191 | PerlIO_printf(Perl_debug_log, |
a0288114 | 4192 | "synthetic stclass \"%s\".\n", |
3f7c398e | 4193 | SvPVX_const(sv));}); |
653099ff | 4194 | } |
a0d0e21e LW |
4195 | } |
4196 | ||
1de06328 YO |
4197 | /* Guard against an embedded (?=) or (?<=) with a longer minlen than |
4198 | the "real" pattern. */ | |
4199 | if (r->minlen < minlen) | |
4200 | r->minlen = minlen; | |
4201 | ||
b81d288d | 4202 | if (RExC_seen & REG_SEEN_GPOS) |
c277df42 | 4203 | r->reganch |= ROPT_GPOS_SEEN; |
830247a4 | 4204 | if (RExC_seen & REG_SEEN_LOOKBEHIND) |
c277df42 | 4205 | r->reganch |= ROPT_LOOKBEHIND_SEEN; |
830247a4 | 4206 | if (RExC_seen & REG_SEEN_EVAL) |
ce862d02 | 4207 | r->reganch |= ROPT_EVAL_SEEN; |
f33976b4 DB |
4208 | if (RExC_seen & REG_SEEN_CANY) |
4209 | r->reganch |= ROPT_CANY_SEEN; | |
a02a5408 JC |
4210 | Newxz(r->startp, RExC_npar, I32); |
4211 | Newxz(r->endp, RExC_npar, I32); | |
fc8cd66c YO |
4212 | if (RExC_charnames) |
4213 | SvREFCNT_dec((SV*)(RExC_charnames)); | |
07be1b83 | 4214 | |
f2278c82 | 4215 | DEBUG_r( RX_DEBUG_on(r) ); |
be8e71aa YO |
4216 | DEBUG_DUMP_r({ |
4217 | PerlIO_printf(Perl_debug_log,"Final program:\n"); | |
3dab1dad YO |
4218 | regdump(r); |
4219 | }); | |
8e9a8a48 YO |
4220 | DEBUG_OFFSETS_r(if (r->offsets) { |
4221 | const U32 len = r->offsets[0]; | |
4222 | U32 i; | |
4223 | GET_RE_DEBUG_FLAGS_DECL; | |
4224 | PerlIO_printf(Perl_debug_log, "Offsets: [%"UVuf"]\n\t", (UV)r->offsets[0]); | |
4225 | for (i = 1; i <= len; i++) { | |
4226 | if (r->offsets[i*2-1] || r->offsets[i*2]) | |
4227 | PerlIO_printf(Perl_debug_log, "%"UVuf":%"UVuf"[%"UVuf"] ", | |
786e8c11 | 4228 | (UV)i, (UV)r->offsets[i*2-1], (UV)r->offsets[i*2]); |
8e9a8a48 YO |
4229 | } |
4230 | PerlIO_printf(Perl_debug_log, "\n"); | |
4231 | }); | |
a0d0e21e | 4232 | return(r); |
a687059c LW |
4233 | } |
4234 | ||
3dab1dad YO |
4235 | |
4236 | #define DEBUG_PARSE_MSG(funcname) DEBUG_PARSE_r({ \ | |
4237 | int rem=(int)(RExC_end - RExC_parse); \ | |
4238 | int cut; \ | |
4239 | int num; \ | |
4240 | int iscut=0; \ | |
4241 | if (rem>10) { \ | |
4242 | rem=10; \ | |
4243 | iscut=1; \ | |
4244 | } \ | |
4245 | cut=10-rem; \ | |
4246 | if (RExC_lastparse!=RExC_parse) \ | |
4247 | PerlIO_printf(Perl_debug_log," >%.*s%-*s", \ | |
4248 | rem, RExC_parse, \ | |
4249 | cut + 4, \ | |
4250 | iscut ? "..." : "<" \ | |
4251 | ); \ | |
4252 | else \ | |
4253 | PerlIO_printf(Perl_debug_log,"%16s",""); \ | |
4254 | \ | |
4255 | if (SIZE_ONLY) \ | |
4256 | num=RExC_size; \ | |
4257 | else \ | |
4258 | num=REG_NODE_NUM(RExC_emit); \ | |
4259 | if (RExC_lastnum!=num) \ | |
be8e71aa | 4260 | PerlIO_printf(Perl_debug_log,"|%4d",num); \ |
3dab1dad | 4261 | else \ |
be8e71aa YO |
4262 | PerlIO_printf(Perl_debug_log,"|%4s",""); \ |
4263 | PerlIO_printf(Perl_debug_log,"|%*s%-4s", \ | |
4264 | (int)((depth*2)), "", \ | |
3dab1dad YO |
4265 | (funcname) \ |
4266 | ); \ | |
4267 | RExC_lastnum=num; \ | |
4268 | RExC_lastparse=RExC_parse; \ | |
4269 | }) | |
4270 | ||
07be1b83 YO |
4271 | |
4272 | ||
3dab1dad YO |
4273 | #define DEBUG_PARSE(funcname) DEBUG_PARSE_r({ \ |
4274 | DEBUG_PARSE_MSG((funcname)); \ | |
4275 | PerlIO_printf(Perl_debug_log,"%4s","\n"); \ | |
4276 | }) | |
a687059c LW |
4277 | /* |
4278 | - reg - regular expression, i.e. main body or parenthesized thing | |
4279 | * | |
4280 | * Caller must absorb opening parenthesis. | |
4281 | * | |
4282 | * Combining parenthesis handling with the base level of regular expression | |
4283 | * is a trifle forced, but the need to tie the tails of the branches to what | |
4284 | * follows makes it hard to avoid. | |
4285 | */ | |
07be1b83 YO |
4286 | #define REGTAIL(x,y,z) regtail((x),(y),(z),depth+1) |
4287 | #ifdef DEBUGGING | |
4288 | #define REGTAIL_STUDY(x,y,z) regtail_study((x),(y),(z),depth+1) | |
4289 | #else | |
4290 | #define REGTAIL_STUDY(x,y,z) regtail((x),(y),(z),depth+1) | |
4291 | #endif | |
3dab1dad | 4292 | |
76e3520e | 4293 | STATIC regnode * |
3dab1dad | 4294 | S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp,U32 depth) |
c277df42 | 4295 | /* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */ |
a687059c | 4296 | { |
27da23d5 | 4297 | dVAR; |
c277df42 IZ |
4298 | register regnode *ret; /* Will be the head of the group. */ |
4299 | register regnode *br; | |
4300 | register regnode *lastbr; | |
cbbf8932 | 4301 | register regnode *ender = NULL; |
a0d0e21e | 4302 | register I32 parno = 0; |
cbbf8932 AL |
4303 | I32 flags; |
4304 | const I32 oregflags = RExC_flags; | |
6136c704 AL |
4305 | bool have_branch = 0; |
4306 | bool is_open = 0; | |
9d1d55b5 JP |
4307 | |
4308 | /* for (?g), (?gc), and (?o) warnings; warning | |
4309 | about (?c) will warn about (?g) -- japhy */ | |
4310 | ||
6136c704 AL |
4311 | #define WASTED_O 0x01 |
4312 | #define WASTED_G 0x02 | |
4313 | #define WASTED_C 0x04 | |
4314 | #define WASTED_GC (0x02|0x04) | |
cbbf8932 | 4315 | I32 wastedflags = 0x00; |
9d1d55b5 | 4316 | |
fac92740 | 4317 | char * parse_start = RExC_parse; /* MJD */ |
a28509cc | 4318 | char * const oregcomp_parse = RExC_parse; |
a0d0e21e | 4319 | |
3dab1dad YO |
4320 | GET_RE_DEBUG_FLAGS_DECL; |
4321 | DEBUG_PARSE("reg "); | |
4322 | ||
4323 | ||
821b33a5 | 4324 | *flagp = 0; /* Tentatively. */ |
a0d0e21e | 4325 | |
9d1d55b5 | 4326 | |
a0d0e21e LW |
4327 | /* Make an OPEN node, if parenthesized. */ |
4328 | if (paren) { | |
fac92740 | 4329 | if (*RExC_parse == '?') { /* (?...) */ |
2b36a5a0 JH |
4330 | U32 posflags = 0, negflags = 0; |
4331 | U32 *flagsp = &posflags; | |
6136c704 | 4332 | bool is_logical = 0; |
a28509cc | 4333 | const char * const seqstart = RExC_parse; |
ca9dfc88 | 4334 | |
830247a4 IZ |
4335 | RExC_parse++; |
4336 | paren = *RExC_parse++; | |
c277df42 | 4337 | ret = NULL; /* For look-ahead/behind. */ |
a0d0e21e | 4338 | switch (paren) { |
fac92740 | 4339 | case '<': /* (?<...) */ |
830247a4 | 4340 | RExC_seen |= REG_SEEN_LOOKBEHIND; |
b81d288d | 4341 | if (*RExC_parse == '!') |
c277df42 | 4342 | paren = ','; |
b81d288d | 4343 | if (*RExC_parse != '=' && *RExC_parse != '!') |
c277df42 | 4344 | goto unknown; |
830247a4 | 4345 | RExC_parse++; |
fac92740 MJD |
4346 | case '=': /* (?=...) */ |
4347 | case '!': /* (?!...) */ | |
830247a4 | 4348 | RExC_seen_zerolen++; |
fac92740 MJD |
4349 | case ':': /* (?:...) */ |
4350 | case '>': /* (?>...) */ | |
a0d0e21e | 4351 | break; |
fac92740 MJD |
4352 | case '$': /* (?$...) */ |
4353 | case '@': /* (?@...) */ | |
8615cb43 | 4354 | vFAIL2("Sequence (?%c...) not implemented", (int)paren); |
a0d0e21e | 4355 | break; |
fac92740 | 4356 | case '#': /* (?#...) */ |
830247a4 IZ |
4357 | while (*RExC_parse && *RExC_parse != ')') |
4358 | RExC_parse++; | |
4359 | if (*RExC_parse != ')') | |
c277df42 | 4360 | FAIL("Sequence (?#... not terminated"); |
830247a4 | 4361 | nextchar(pRExC_state); |
a0d0e21e LW |
4362 | *flagp = TRYAGAIN; |
4363 | return NULL; | |
fac92740 | 4364 | case 'p': /* (?p...) */ |
9014280d | 4365 | if (SIZE_ONLY && ckWARN2(WARN_DEPRECATED, WARN_REGEXP)) |
f9373011 | 4366 | vWARNdep(RExC_parse, "(?p{}) is deprecated - use (??{})"); |
8c8ad484 | 4367 | /* FALL THROUGH*/ |
fac92740 | 4368 | case '?': /* (??...) */ |
6136c704 | 4369 | is_logical = 1; |
438a3801 YST |
4370 | if (*RExC_parse != '{') |
4371 | goto unknown; | |
830247a4 | 4372 | paren = *RExC_parse++; |
0f5d15d6 | 4373 | /* FALL THROUGH */ |
fac92740 | 4374 | case '{': /* (?{...}) */ |
c277df42 | 4375 | { |
c277df42 IZ |
4376 | I32 count = 1, n = 0; |
4377 | char c; | |
830247a4 | 4378 | char *s = RExC_parse; |
c277df42 | 4379 | |
830247a4 IZ |
4380 | RExC_seen_zerolen++; |
4381 | RExC_seen |= REG_SEEN_EVAL; | |
4382 | while (count && (c = *RExC_parse)) { | |
6136c704 AL |
4383 | if (c == '\\') { |
4384 | if (RExC_parse[1]) | |
4385 | RExC_parse++; | |
4386 | } | |
b81d288d | 4387 | else if (c == '{') |
c277df42 | 4388 | count++; |
b81d288d | 4389 | else if (c == '}') |
c277df42 | 4390 | count--; |
830247a4 | 4391 | RExC_parse++; |
c277df42 | 4392 | } |
6136c704 | 4393 | if (*RExC_parse != ')') { |
b81d288d | 4394 | RExC_parse = s; |
b45f050a JF |
4395 | vFAIL("Sequence (?{...}) not terminated or not {}-balanced"); |
4396 | } | |
c277df42 | 4397 | if (!SIZE_ONLY) { |
f3548bdc | 4398 | PAD *pad; |
6136c704 AL |
4399 | OP_4tree *sop, *rop; |
4400 | SV * const sv = newSVpvn(s, RExC_parse - 1 - s); | |
c277df42 | 4401 | |
569233ed SB |
4402 | ENTER; |
4403 | Perl_save_re_context(aTHX); | |
f3548bdc | 4404 | rop = sv_compile_2op(sv, &sop, "re", &pad); |
9b978d73 DM |
4405 | sop->op_private |= OPpREFCOUNTED; |
4406 | /* re_dup will OpREFCNT_inc */ | |
4407 | OpREFCNT_set(sop, 1); | |
569233ed | 4408 | LEAVE; |
c277df42 | 4409 | |
830247a4 IZ |
4410 | n = add_data(pRExC_state, 3, "nop"); |
4411 | RExC_rx->data->data[n] = (void*)rop; | |
4412 | RExC_rx->data->data[n+1] = (void*)sop; | |
f3548bdc | 4413 | RExC_rx->data->data[n+2] = (void*)pad; |
c277df42 | 4414 | SvREFCNT_dec(sv); |
a0ed51b3 | 4415 | } |
e24b16f9 | 4416 | else { /* First pass */ |
830247a4 | 4417 | if (PL_reginterp_cnt < ++RExC_seen_evals |
923e4eb5 | 4418 | && IN_PERL_RUNTIME) |
2cd61cdb IZ |
4419 | /* No compiled RE interpolated, has runtime |
4420 | components ===> unsafe. */ | |
4421 | FAIL("Eval-group not allowed at runtime, use re 'eval'"); | |
5b61d3f7 | 4422 | if (PL_tainting && PL_tainted) |
cc6b7395 | 4423 | FAIL("Eval-group in insecure regular expression"); |
54df2634 | 4424 | #if PERL_VERSION > 8 |
923e4eb5 | 4425 | if (IN_PERL_COMPILETIME) |
b5c19bd7 | 4426 | PL_cv_has_eval = 1; |
54df2634 | 4427 | #endif |
c277df42 | 4428 | } |
b5c19bd7 | 4429 | |
830247a4 | 4430 | nextchar(pRExC_state); |
6136c704 | 4431 | if (is_logical) { |
830247a4 | 4432 | ret = reg_node(pRExC_state, LOGICAL); |
0f5d15d6 IZ |
4433 | if (!SIZE_ONLY) |
4434 | ret->flags = 2; | |
3dab1dad | 4435 | REGTAIL(pRExC_state, ret, reganode(pRExC_state, EVAL, n)); |
fac92740 | 4436 | /* deal with the length of this later - MJD */ |
0f5d15d6 IZ |
4437 | return ret; |
4438 | } | |
ccb2c380 MP |
4439 | ret = reganode(pRExC_state, EVAL, n); |
4440 | Set_Node_Length(ret, RExC_parse - parse_start + 1); | |
4441 | Set_Node_Offset(ret, parse_start); | |
4442 | return ret; | |
c277df42 | 4443 | } |
fac92740 | 4444 | case '(': /* (?(?{...})...) and (?(?=...)...) */ |
c277df42 | 4445 | { |
fac92740 | 4446 | if (RExC_parse[0] == '?') { /* (?(?...)) */ |
b81d288d AB |
4447 | if (RExC_parse[1] == '=' || RExC_parse[1] == '!' |
4448 | || RExC_parse[1] == '<' | |
830247a4 | 4449 | || RExC_parse[1] == '{') { /* Lookahead or eval. */ |
c277df42 IZ |
4450 | I32 flag; |
4451 | ||
830247a4 | 4452 | ret = reg_node(pRExC_state, LOGICAL); |
0f5d15d6 IZ |
4453 | if (!SIZE_ONLY) |
4454 | ret->flags = 1; | |
3dab1dad | 4455 | REGTAIL(pRExC_state, ret, reg(pRExC_state, 1, &flag,depth+1)); |
c277df42 | 4456 | goto insert_if; |
b81d288d | 4457 | } |
a0ed51b3 | 4458 | } |
830247a4 | 4459 | else if (RExC_parse[0] >= '1' && RExC_parse[0] <= '9' ) { |
fac92740 | 4460 | /* (?(1)...) */ |
6136c704 | 4461 | char c; |
830247a4 | 4462 | parno = atoi(RExC_parse++); |
c277df42 | 4463 | |
830247a4 IZ |
4464 | while (isDIGIT(*RExC_parse)) |
4465 | RExC_parse++; | |
fac92740 | 4466 | ret = reganode(pRExC_state, GROUPP, parno); |
2af232bd | 4467 | |
830247a4 | 4468 | if ((c = *nextchar(pRExC_state)) != ')') |
b45f050a | 4469 | vFAIL("Switch condition not recognized"); |
c277df42 | 4470 | insert_if: |
3dab1dad YO |
4471 | REGTAIL(pRExC_state, ret, reganode(pRExC_state, IFTHEN, 0)); |
4472 | br = regbranch(pRExC_state, &flags, 1,depth+1); | |
c277df42 | 4473 | if (br == NULL) |
830247a4 | 4474 | br = reganode(pRExC_state, LONGJMP, 0); |
c277df42 | 4475 | else |
3dab1dad | 4476 | REGTAIL(pRExC_state, br, reganode(pRExC_state, LONGJMP, 0)); |
830247a4 | 4477 | c = *nextchar(pRExC_state); |
d1b80229 IZ |
4478 | if (flags&HASWIDTH) |
4479 | *flagp |= HASWIDTH; | |
c277df42 | 4480 | if (c == '|') { |
830247a4 | 4481 | lastbr = reganode(pRExC_state, IFTHEN, 0); /* Fake one for optimizer. */ |
3dab1dad YO |
4482 | regbranch(pRExC_state, &flags, 1,depth+1); |
4483 | REGTAIL(pRExC_state, ret, lastbr); | |
d1b80229 IZ |
4484 | if (flags&HASWIDTH) |
4485 | *flagp |= HASWIDTH; | |
830247a4 | 4486 | c = *nextchar(pRExC_state); |
a0ed51b3 LW |
4487 | } |
4488 | else | |
c277df42 IZ |
4489 | lastbr = NULL; |
4490 | if (c != ')') | |
8615cb43 | 4491 | vFAIL("Switch (?(condition)... contains too many branches"); |
830247a4 | 4492 | ender = reg_node(pRExC_state, TAIL); |
3dab1dad | 4493 | REGTAIL(pRExC_state, br, ender); |
c277df42 | 4494 | if (lastbr) { |
3dab1dad YO |
4495 | REGTAIL(pRExC_state, lastbr, ender); |
4496 | REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); | |
a0ed51b3 LW |
4497 | } |
4498 | else | |
3dab1dad | 4499 | REGTAIL(pRExC_state, ret, ender); |
c277df42 | 4500 | return ret; |
a0ed51b3 LW |
4501 | } |
4502 | else { | |
830247a4 | 4503 | vFAIL2("Unknown switch condition (?(%.2s", RExC_parse); |
c277df42 IZ |
4504 | } |
4505 | } | |
1b1626e4 | 4506 | case 0: |
830247a4 | 4507 | RExC_parse--; /* for vFAIL to print correctly */ |
8615cb43 | 4508 | vFAIL("Sequence (? incomplete"); |
1b1626e4 | 4509 | break; |
a0d0e21e | 4510 | default: |
830247a4 | 4511 | --RExC_parse; |
fac92740 | 4512 | parse_flags: /* (?i) */ |
830247a4 | 4513 | while (*RExC_parse && strchr("iogcmsx", *RExC_parse)) { |
9d1d55b5 JP |
4514 | /* (?g), (?gc) and (?o) are useless here |
4515 | and must be globally applied -- japhy */ | |
4516 | ||
4517 | if (*RExC_parse == 'o' || *RExC_parse == 'g') { | |
4518 | if (SIZE_ONLY && ckWARN(WARN_REGEXP)) { | |
6136c704 | 4519 | const I32 wflagbit = *RExC_parse == 'o' ? WASTED_O : WASTED_G; |
9d1d55b5 JP |
4520 | if (! (wastedflags & wflagbit) ) { |
4521 | wastedflags |= wflagbit; | |
4522 | vWARN5( | |
4523 | RExC_parse + 1, | |
4524 | "Useless (%s%c) - %suse /%c modifier", | |
4525 | flagsp == &negflags ? "?-" : "?", | |
4526 | *RExC_parse, | |
4527 | flagsp == &negflags ? "don't " : "", | |
4528 | *RExC_parse | |
4529 | ); | |
4530 | } | |
4531 | } | |
4532 | } | |
4533 | else if (*RExC_parse == 'c') { | |
4534 | if (SIZE_ONLY && ckWARN(WARN_REGEXP)) { | |
6136c704 AL |
4535 | if (! (wastedflags & WASTED_C) ) { |
4536 | wastedflags |= WASTED_GC; | |
9d1d55b5 JP |
4537 | vWARN3( |
4538 | RExC_parse + 1, | |
4539 | "Useless (%sc) - %suse /gc modifier", | |
4540 | flagsp == &negflags ? "?-" : "?", | |
4541 | flagsp == &negflags ? "don't " : "" | |
4542 | ); | |
4543 | } | |
4544 | } | |
4545 | } | |
4546 | else { pmflag(flagsp, *RExC_parse); } | |
4547 | ||
830247a4 | 4548 | ++RExC_parse; |
ca9dfc88 | 4549 | } |
830247a4 | 4550 | if (*RExC_parse == '-') { |
ca9dfc88 | 4551 | flagsp = &negflags; |
9d1d55b5 | 4552 | wastedflags = 0; /* reset so (?g-c) warns twice */ |
830247a4 | 4553 | ++RExC_parse; |
ca9dfc88 | 4554 | goto parse_flags; |
48c036b1 | 4555 | } |
e2509266 JH |
4556 | RExC_flags |= posflags; |
4557 | RExC_flags &= ~negflags; | |
830247a4 IZ |
4558 | if (*RExC_parse == ':') { |
4559 | RExC_parse++; | |
ca9dfc88 IZ |
4560 | paren = ':'; |
4561 | break; | |
4562 | } | |
c277df42 | 4563 | unknown: |
830247a4 IZ |
4564 | if (*RExC_parse != ')') { |
4565 | RExC_parse++; | |
4566 | vFAIL3("Sequence (%.*s...) not recognized", RExC_parse-seqstart, seqstart); | |
b45f050a | 4567 | } |
830247a4 | 4568 | nextchar(pRExC_state); |
a0d0e21e LW |
4569 | *flagp = TRYAGAIN; |
4570 | return NULL; | |
4571 | } | |
4572 | } | |
fac92740 | 4573 | else { /* (...) */ |
830247a4 IZ |
4574 | parno = RExC_npar; |
4575 | RExC_npar++; | |
4576 | ret = reganode(pRExC_state, OPEN, parno); | |
fac92740 MJD |
4577 | Set_Node_Length(ret, 1); /* MJD */ |
4578 | Set_Node_Offset(ret, RExC_parse); /* MJD */ | |
6136c704 | 4579 | is_open = 1; |
a0d0e21e | 4580 | } |
a0ed51b3 | 4581 | } |
fac92740 | 4582 | else /* ! paren */ |
a0d0e21e LW |
4583 | ret = NULL; |
4584 | ||
4585 | /* Pick up the branches, linking them together. */ | |
fac92740 | 4586 | parse_start = RExC_parse; /* MJD */ |
3dab1dad | 4587 | br = regbranch(pRExC_state, &flags, 1,depth+1); |
fac92740 | 4588 | /* branch_len = (paren != 0); */ |
2af232bd | 4589 | |
a0d0e21e LW |
4590 | if (br == NULL) |
4591 | return(NULL); | |
830247a4 IZ |
4592 | if (*RExC_parse == '|') { |
4593 | if (!SIZE_ONLY && RExC_extralen) { | |
4594 | reginsert(pRExC_state, BRANCHJ, br); | |
a0ed51b3 | 4595 | } |
fac92740 | 4596 | else { /* MJD */ |
830247a4 | 4597 | reginsert(pRExC_state, BRANCH, br); |
fac92740 MJD |
4598 | Set_Node_Length(br, paren != 0); |
4599 | Set_Node_Offset_To_R(br-RExC_emit_start, parse_start-RExC_start); | |
4600 | } | |
c277df42 IZ |
4601 | have_branch = 1; |
4602 | if (SIZE_ONLY) | |
830247a4 | 4603 | RExC_extralen += 1; /* For BRANCHJ-BRANCH. */ |
a0ed51b3 LW |
4604 | } |
4605 | else if (paren == ':') { | |
c277df42 IZ |
4606 | *flagp |= flags&SIMPLE; |
4607 | } | |
6136c704 | 4608 | if (is_open) { /* Starts with OPEN. */ |
3dab1dad | 4609 | REGTAIL(pRExC_state, ret, br); /* OPEN -> first. */ |
a0ed51b3 LW |
4610 | } |
4611 | else if (paren != '?') /* Not Conditional */ | |
a0d0e21e | 4612 | ret = br; |
32a0ca98 | 4613 | *flagp |= flags & (SPSTART | HASWIDTH); |
c277df42 | 4614 | lastbr = br; |
830247a4 IZ |
4615 | while (*RExC_parse == '|') { |
4616 | if (!SIZE_ONLY && RExC_extralen) { | |
4617 | ender = reganode(pRExC_state, LONGJMP,0); | |
3dab1dad | 4618 | REGTAIL(pRExC_state, NEXTOPER(NEXTOPER(lastbr)), ender); /* Append to the previous. */ |
c277df42 IZ |
4619 | } |
4620 | if (SIZE_ONLY) | |
830247a4 IZ |
4621 | RExC_extralen += 2; /* Account for LONGJMP. */ |
4622 | nextchar(pRExC_state); | |
3dab1dad | 4623 | br = regbranch(pRExC_state, &flags, 0, depth+1); |
2af232bd | 4624 | |
a687059c | 4625 | if (br == NULL) |
a0d0e21e | 4626 | return(NULL); |
3dab1dad | 4627 | REGTAIL(pRExC_state, lastbr, br); /* BRANCH -> BRANCH. */ |
c277df42 | 4628 | lastbr = br; |
821b33a5 IZ |
4629 | if (flags&HASWIDTH) |
4630 | *flagp |= HASWIDTH; | |
a687059c | 4631 | *flagp |= flags&SPSTART; |
a0d0e21e LW |
4632 | } |
4633 | ||
c277df42 IZ |
4634 | if (have_branch || paren != ':') { |
4635 | /* Make a closing node, and hook it on the end. */ | |
4636 | switch (paren) { | |
4637 | case ':': | |
830247a4 | 4638 | ender = reg_node(pRExC_state, TAIL); |
c277df42 IZ |
4639 | break; |
4640 | case 1: | |
830247a4 | 4641 | ender = reganode(pRExC_state, CLOSE, parno); |
fac92740 MJD |
4642 | Set_Node_Offset(ender,RExC_parse+1); /* MJD */ |
4643 | Set_Node_Length(ender,1); /* MJD */ | |
c277df42 IZ |
4644 | break; |
4645 | case '<': | |
c277df42 IZ |
4646 | case ',': |
4647 | case '=': | |
4648 | case '!': | |
c277df42 | 4649 | *flagp &= ~HASWIDTH; |
821b33a5 IZ |
4650 | /* FALL THROUGH */ |
4651 | case '>': | |
830247a4 | 4652 | ender = reg_node(pRExC_state, SUCCEED); |
c277df42 IZ |
4653 | break; |
4654 | case 0: | |
830247a4 | 4655 | ender = reg_node(pRExC_state, END); |
c277df42 IZ |
4656 | break; |
4657 | } | |
07be1b83 | 4658 | REGTAIL_STUDY(pRExC_state, lastbr, ender); |
a0d0e21e | 4659 | |
9674d46a | 4660 | if (have_branch && !SIZE_ONLY) { |
c277df42 | 4661 | /* Hook the tails of the branches to the closing node. */ |
9674d46a AL |
4662 | for (br = ret; br; br = regnext(br)) { |
4663 | const U8 op = PL_regkind[OP(br)]; | |
4664 | if (op == BRANCH) { | |
07be1b83 | 4665 | REGTAIL_STUDY(pRExC_state, NEXTOPER(br), ender); |
9674d46a AL |
4666 | } |
4667 | else if (op == BRANCHJ) { | |
07be1b83 | 4668 | REGTAIL_STUDY(pRExC_state, NEXTOPER(NEXTOPER(br)), ender); |
9674d46a | 4669 | } |
c277df42 IZ |
4670 | } |
4671 | } | |
a0d0e21e | 4672 | } |
c277df42 IZ |
4673 | |
4674 | { | |
e1ec3a88 AL |
4675 | const char *p; |
4676 | static const char parens[] = "=!<,>"; | |
c277df42 IZ |
4677 | |
4678 | if (paren && (p = strchr(parens, paren))) { | |
eb160463 | 4679 | U8 node = ((p - parens) % 2) ? UNLESSM : IFMATCH; |
c277df42 IZ |
4680 | int flag = (p - parens) > 1; |
4681 | ||
4682 | if (paren == '>') | |
4683 | node = SUSPEND, flag = 0; | |
830247a4 | 4684 | reginsert(pRExC_state, node,ret); |
45948336 EP |
4685 | Set_Node_Cur_Length(ret); |
4686 | Set_Node_Offset(ret, parse_start + 1); | |
c277df42 | 4687 | ret->flags = flag; |
07be1b83 | 4688 | REGTAIL_STUDY(pRExC_state, ret, reg_node(pRExC_state, TAIL)); |
c277df42 | 4689 | } |
a0d0e21e LW |
4690 | } |
4691 | ||
4692 | /* Check for proper termination. */ | |
ce3e6498 | 4693 | if (paren) { |
e2509266 | 4694 | RExC_flags = oregflags; |
830247a4 IZ |
4695 | if (RExC_parse >= RExC_end || *nextchar(pRExC_state) != ')') { |
4696 | RExC_parse = oregcomp_parse; | |
380a0633 | 4697 | vFAIL("Unmatched ("); |
ce3e6498 | 4698 | } |
a0ed51b3 | 4699 | } |
830247a4 IZ |
4700 | else if (!paren && RExC_parse < RExC_end) { |
4701 | if (*RExC_parse == ')') { | |
4702 | RExC_parse++; | |
380a0633 | 4703 | vFAIL("Unmatched )"); |
a0ed51b3 LW |
4704 | } |
4705 | else | |
b45f050a | 4706 | FAIL("Junk on end of regexp"); /* "Can't happen". */ |
a0d0e21e LW |
4707 | /* NOTREACHED */ |
4708 | } | |
a687059c | 4709 | |
a0d0e21e | 4710 | return(ret); |
a687059c LW |
4711 | } |
4712 | ||
4713 | /* | |
4714 | - regbranch - one alternative of an | operator | |
4715 | * | |
4716 | * Implements the concatenation operator. | |
4717 | */ | |
76e3520e | 4718 | STATIC regnode * |
3dab1dad | 4719 | S_regbranch(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, I32 first, U32 depth) |
a687059c | 4720 | { |
97aff369 | 4721 | dVAR; |
c277df42 IZ |
4722 | register regnode *ret; |
4723 | register regnode *chain = NULL; | |
4724 | register regnode *latest; | |
4725 | I32 flags = 0, c = 0; | |
3dab1dad YO |
4726 | GET_RE_DEBUG_FLAGS_DECL; |
4727 | DEBUG_PARSE("brnc"); | |
b81d288d | 4728 | if (first) |
c277df42 IZ |
4729 | ret = NULL; |
4730 | else { | |
b81d288d | 4731 | if (!SIZE_ONLY && RExC_extralen) |
830247a4 | 4732 | ret = reganode(pRExC_state, BRANCHJ,0); |
fac92740 | 4733 | else { |
830247a4 | 4734 | ret = reg_node(pRExC_state, BRANCH); |
fac92740 MJD |
4735 | Set_Node_Length(ret, 1); |
4736 | } | |
c277df42 IZ |
4737 | } |
4738 | ||
b81d288d | 4739 | if (!first && SIZE_ONLY) |
830247a4 | 4740 | RExC_extralen += 1; /* BRANCHJ */ |
b81d288d | 4741 | |
c277df42 | 4742 | *flagp = WORST; /* Tentatively. */ |
a0d0e21e | 4743 | |
830247a4 IZ |
4744 | RExC_parse--; |
4745 | nextchar(pRExC_state); | |
4746 | while (RExC_parse < RExC_end && *RExC_parse != '|' && *RExC_parse != ')') { | |
a0d0e21e | 4747 | flags &= ~TRYAGAIN; |
3dab1dad | 4748 | latest = regpiece(pRExC_state, &flags,depth+1); |
a0d0e21e LW |
4749 | if (latest == NULL) { |
4750 | if (flags & TRYAGAIN) | |
4751 | continue; | |
4752 | return(NULL); | |
a0ed51b3 LW |
4753 | } |
4754 | else if (ret == NULL) | |
c277df42 | 4755 | ret = latest; |
a0d0e21e | 4756 | *flagp |= flags&HASWIDTH; |
c277df42 | 4757 | if (chain == NULL) /* First piece. */ |
a0d0e21e LW |
4758 | *flagp |= flags&SPSTART; |
4759 | else { | |
830247a4 | 4760 | RExC_naughty++; |
3dab1dad | 4761 | REGTAIL(pRExC_state, chain, latest); |
a687059c | 4762 | } |
a0d0e21e | 4763 | chain = latest; |
c277df42 IZ |
4764 | c++; |
4765 | } | |
4766 | if (chain == NULL) { /* Loop ran zero times. */ | |
830247a4 | 4767 | chain = reg_node(pRExC_state, NOTHING); |
c277df42 IZ |
4768 | if (ret == NULL) |
4769 | ret = chain; | |
4770 | } | |
4771 | if (c == 1) { | |
4772 | *flagp |= flags&SIMPLE; | |
a0d0e21e | 4773 | } |
a687059c | 4774 | |
d4c19fe8 | 4775 | return ret; |
a687059c LW |
4776 | } |
4777 | ||
4778 | /* | |
4779 | - regpiece - something followed by possible [*+?] | |
4780 | * | |
4781 | * Note that the branching code sequences used for ? and the general cases | |
4782 | * of * and + are somewhat optimized: they use the same NOTHING node as | |
4783 | * both the endmarker for their branch list and the body of the last branch. | |
4784 | * It might seem that this node could be dispensed with entirely, but the | |
4785 | * endmarker role is not redundant. | |
4786 | */ | |
76e3520e | 4787 | STATIC regnode * |
3dab1dad | 4788 | S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth) |
a687059c | 4789 | { |
97aff369 | 4790 | dVAR; |
c277df42 | 4791 | register regnode *ret; |
a0d0e21e LW |
4792 | register char op; |
4793 | register char *next; | |
4794 | I32 flags; | |
1df70142 | 4795 | const char * const origparse = RExC_parse; |
a0d0e21e | 4796 | I32 min; |
c277df42 | 4797 | I32 max = REG_INFTY; |
fac92740 | 4798 | char *parse_start; |
10edeb5d | 4799 | const char *maxpos = NULL; |
3dab1dad YO |
4800 | GET_RE_DEBUG_FLAGS_DECL; |
4801 | DEBUG_PARSE("piec"); | |
a0d0e21e | 4802 | |
3dab1dad | 4803 | ret = regatom(pRExC_state, &flags,depth+1); |
a0d0e21e LW |
4804 | if (ret == NULL) { |
4805 | if (flags & TRYAGAIN) | |
4806 | *flagp |= TRYAGAIN; | |
4807 | return(NULL); | |
4808 | } | |
4809 | ||
830247a4 | 4810 | op = *RExC_parse; |
a0d0e21e | 4811 | |
830247a4 | 4812 | if (op == '{' && regcurly(RExC_parse)) { |
10edeb5d | 4813 | maxpos = NULL; |
fac92740 | 4814 | parse_start = RExC_parse; /* MJD */ |
830247a4 | 4815 | next = RExC_parse + 1; |
a0d0e21e LW |
4816 | while (isDIGIT(*next) || *next == ',') { |
4817 | if (*next == ',') { | |
4818 | if (maxpos) | |
4819 | break; | |
4820 | else | |
4821 | maxpos = next; | |
a687059c | 4822 | } |
a0d0e21e LW |
4823 | next++; |
4824 | } | |
4825 | if (*next == '}') { /* got one */ | |
4826 | if (!maxpos) | |
4827 | maxpos = next; | |
830247a4 IZ |
4828 | RExC_parse++; |
4829 | min = atoi(RExC_parse); | |
a0d0e21e LW |
4830 | if (*maxpos == ',') |
4831 | maxpos++; | |
4832 | else | |
830247a4 | 4833 | maxpos = RExC_parse; |
a0d0e21e LW |
4834 | max = atoi(maxpos); |
4835 | if (!max && *maxpos != '0') | |
c277df42 IZ |
4836 | max = REG_INFTY; /* meaning "infinity" */ |
4837 | else if (max >= REG_INFTY) | |
8615cb43 | 4838 | vFAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1); |
830247a4 IZ |
4839 | RExC_parse = next; |
4840 | nextchar(pRExC_state); | |
a0d0e21e LW |
4841 | |
4842 | do_curly: | |
4843 | if ((flags&SIMPLE)) { | |
830247a4 IZ |
4844 | RExC_naughty += 2 + RExC_naughty / 2; |
4845 | reginsert(pRExC_state, CURLY, ret); | |
fac92740 MJD |
4846 | Set_Node_Offset(ret, parse_start+1); /* MJD */ |
4847 | Set_Node_Cur_Length(ret); | |
a0d0e21e LW |
4848 | } |
4849 | else { | |
3dab1dad | 4850 | regnode * const w = reg_node(pRExC_state, WHILEM); |
2c2d71f5 JH |
4851 | |
4852 | w->flags = 0; | |
3dab1dad | 4853 | REGTAIL(pRExC_state, ret, w); |
830247a4 IZ |
4854 | if (!SIZE_ONLY && RExC_extralen) { |
4855 | reginsert(pRExC_state, LONGJMP,ret); | |
4856 | reginsert(pRExC_state, NOTHING,ret); | |
c277df42 IZ |
4857 | NEXT_OFF(ret) = 3; /* Go over LONGJMP. */ |
4858 | } | |
830247a4 | 4859 | reginsert(pRExC_state, CURLYX,ret); |
fac92740 MJD |
4860 | /* MJD hk */ |
4861 | Set_Node_Offset(ret, parse_start+1); | |
2af232bd | 4862 | Set_Node_Length(ret, |
fac92740 | 4863 | op == '{' ? (RExC_parse - parse_start) : 1); |
2af232bd | 4864 | |
830247a4 | 4865 | if (!SIZE_ONLY && RExC_extralen) |
c277df42 | 4866 | NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */ |
3dab1dad | 4867 | REGTAIL(pRExC_state, ret, reg_node(pRExC_state, NOTHING)); |
c277df42 | 4868 | if (SIZE_ONLY) |
830247a4 IZ |
4869 | RExC_whilem_seen++, RExC_extralen += 3; |
4870 | RExC_naughty += 4 + RExC_naughty; /* compound interest */ | |
a0d0e21e | 4871 | } |
c277df42 | 4872 | ret->flags = 0; |
a0d0e21e LW |
4873 | |
4874 | if (min > 0) | |
821b33a5 IZ |
4875 | *flagp = WORST; |
4876 | if (max > 0) | |
4877 | *flagp |= HASWIDTH; | |
a0d0e21e | 4878 | if (max && max < min) |
8615cb43 | 4879 | vFAIL("Can't do {n,m} with n > m"); |
c277df42 | 4880 | if (!SIZE_ONLY) { |
eb160463 GS |
4881 | ARG1_SET(ret, (U16)min); |
4882 | ARG2_SET(ret, (U16)max); | |
a687059c | 4883 | } |
a687059c | 4884 | |
a0d0e21e | 4885 | goto nest_check; |
a687059c | 4886 | } |
a0d0e21e | 4887 | } |
a687059c | 4888 | |
a0d0e21e LW |
4889 | if (!ISMULT1(op)) { |
4890 | *flagp = flags; | |
a687059c | 4891 | return(ret); |
a0d0e21e | 4892 | } |
bb20fd44 | 4893 | |
c277df42 | 4894 | #if 0 /* Now runtime fix should be reliable. */ |
b45f050a JF |
4895 | |
4896 | /* if this is reinstated, don't forget to put this back into perldiag: | |
4897 | ||
4898 | =item Regexp *+ operand could be empty at {#} in regex m/%s/ | |
4899 | ||
4900 | (F) The part of the regexp subject to either the * or + quantifier | |
4901 | could match an empty string. The {#} shows in the regular | |
4902 | expression about where the problem was discovered. | |
4903 | ||
4904 | */ | |
4905 | ||
bb20fd44 | 4906 | if (!(flags&HASWIDTH) && op != '?') |
b45f050a | 4907 | vFAIL("Regexp *+ operand could be empty"); |
b81d288d | 4908 | #endif |
bb20fd44 | 4909 | |
fac92740 | 4910 | parse_start = RExC_parse; |
830247a4 | 4911 | nextchar(pRExC_state); |
a0d0e21e | 4912 | |
821b33a5 | 4913 | *flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH); |
a0d0e21e LW |
4914 | |
4915 | if (op == '*' && (flags&SIMPLE)) { | |
830247a4 | 4916 | reginsert(pRExC_state, STAR, ret); |
c277df42 | 4917 | ret->flags = 0; |
830247a4 | 4918 | RExC_naughty += 4; |
a0d0e21e LW |
4919 | } |
4920 | else if (op == '*') { | |
4921 | min = 0; | |
4922 | goto do_curly; | |
a0ed51b3 LW |
4923 | } |
4924 | else if (op == '+' && (flags&SIMPLE)) { | |
830247a4 | 4925 | reginsert(pRExC_state, PLUS, ret); |
c277df42 | 4926 | ret->flags = 0; |
830247a4 | 4927 | RExC_naughty += 3; |
a0d0e21e LW |
4928 | } |
4929 | else if (op == '+') { | |
4930 | min = 1; | |
4931 | goto do_curly; | |
a0ed51b3 LW |
4932 | } |
4933 | else if (op == '?') { | |
a0d0e21e LW |
4934 | min = 0; max = 1; |
4935 | goto do_curly; | |
4936 | } | |
4937 | nest_check: | |
041457d9 | 4938 | if (!SIZE_ONLY && !(flags&HASWIDTH) && max > REG_INFTY/3 && ckWARN(WARN_REGEXP)) { |
830247a4 | 4939 | vWARN3(RExC_parse, |
b45f050a | 4940 | "%.*s matches null string many times", |
afd78fd5 | 4941 | (int)(RExC_parse >= origparse ? RExC_parse - origparse : 0), |
b45f050a | 4942 | origparse); |
a0d0e21e LW |
4943 | } |
4944 | ||
830247a4 IZ |
4945 | if (*RExC_parse == '?') { |
4946 | nextchar(pRExC_state); | |
4947 | reginsert(pRExC_state, MINMOD, ret); | |
3dab1dad | 4948 | REGTAIL(pRExC_state, ret, ret + NODE_STEP_REGNODE); |
a0d0e21e | 4949 | } |
830247a4 IZ |
4950 | if (ISMULT2(RExC_parse)) { |
4951 | RExC_parse++; | |
b45f050a JF |
4952 | vFAIL("Nested quantifiers"); |
4953 | } | |
a0d0e21e LW |
4954 | |
4955 | return(ret); | |
a687059c LW |
4956 | } |
4957 | ||
fc8cd66c YO |
4958 | |
4959 | /* reg_namedseq(pRExC_state,UVp) | |
4960 | ||
4961 | This is expected to be called by a parser routine that has | |
4962 | recognized'\N' and needs to handle the rest. RExC_parse is | |
4963 | expected to point at the first char following the N at the time | |
4964 | of the call. | |
4965 | ||
4966 | If valuep is non-null then it is assumed that we are parsing inside | |
4967 | of a charclass definition and the first codepoint in the resolved | |
4968 | string is returned via *valuep and the routine will return NULL. | |
4969 | In this mode if a multichar string is returned from the charnames | |
4970 | handler a warning will be issued, and only the first char in the | |
4971 | sequence will be examined. If the string returned is zero length | |
4972 | then the value of *valuep is undefined and NON-NULL will | |
4973 | be returned to indicate failure. (This will NOT be a valid pointer | |
4974 | to a regnode.) | |
4975 | ||
4976 | If value is null then it is assumed that we are parsing normal text | |
4977 | and inserts a new EXACT node into the program containing the resolved | |
4978 | string and returns a pointer to the new node. If the string is | |
4979 | zerolength a NOTHING node is emitted. | |
4980 | ||
4981 | On success RExC_parse is set to the char following the endbrace. | |
4982 | Parsing failures will generate a fatal errorvia vFAIL(...) | |
4983 | ||
4984 | NOTE: We cache all results from the charnames handler locally in | |
4985 | the RExC_charnames hash (created on first use) to prevent a charnames | |
4986 | handler from playing silly-buggers and returning a short string and | |
4987 | then a long string for a given pattern. Since the regexp program | |
4988 | size is calculated during an initial parse this would result | |
4989 | in a buffer overrun so we cache to prevent the charname result from | |
4990 | changing during the course of the parse. | |
4991 | ||
4992 | */ | |
4993 | STATIC regnode * | |
4994 | S_reg_namedseq(pTHX_ RExC_state_t *pRExC_state, UV *valuep) | |
4995 | { | |
4996 | char * name; /* start of the content of the name */ | |
4997 | char * endbrace; /* endbrace following the name */ | |
4998 | SV *sv_str = NULL; | |
4999 | SV *sv_name = NULL; | |
5000 | STRLEN len; /* this has various purposes throughout the code */ | |
5001 | bool cached = 0; /* if this is true then we shouldn't refcount dev sv_str */ | |
5002 | regnode *ret = NULL; | |
5003 | ||
5004 | if (*RExC_parse != '{') { | |
5005 | vFAIL("Missing braces on \\N{}"); | |
5006 | } | |
5007 | name = RExC_parse+1; | |
5008 | endbrace = strchr(RExC_parse, '}'); | |
5009 | if ( ! endbrace ) { | |
5010 | RExC_parse++; | |
5011 | vFAIL("Missing right brace on \\N{}"); | |
5012 | } | |
5013 | RExC_parse = endbrace + 1; | |
5014 | ||
5015 | ||
5016 | /* RExC_parse points at the beginning brace, | |
5017 | endbrace points at the last */ | |
5018 | if ( name[0]=='U' && name[1]=='+' ) { | |
5019 | /* its a "unicode hex" notation {U+89AB} */ | |
5020 | I32 fl = PERL_SCAN_ALLOW_UNDERSCORES | |
5021 | | PERL_SCAN_DISALLOW_PREFIX | |
5022 | | (SIZE_ONLY ? PERL_SCAN_SILENT_ILLDIGIT : 0); | |
5023 | UV cp; | |
196f1508 | 5024 | len = (STRLEN)(endbrace - name - 2); |
fc8cd66c | 5025 | cp = grok_hex(name + 2, &len, &fl, NULL); |
196f1508 | 5026 | if ( len != (STRLEN)(endbrace - name - 2) ) { |
fc8cd66c YO |
5027 | cp = 0xFFFD; |
5028 | } | |
5029 | if (cp > 0xff) | |
5030 | RExC_utf8 = 1; | |
5031 | if ( valuep ) { | |
5032 | *valuep = cp; | |
5033 | return NULL; | |
5034 | } | |
5035 | sv_str= Perl_newSVpvf_nocontext("%c",(int)cp); | |
5036 | } else { | |
5037 | /* fetch the charnames handler for this scope */ | |
5038 | HV * const table = GvHV(PL_hintgv); | |
5039 | SV **cvp= table ? | |
5040 | hv_fetchs(table, "charnames", FALSE) : | |
5041 | NULL; | |
5042 | SV *cv= cvp ? *cvp : NULL; | |
5043 | HE *he_str; | |
5044 | int count; | |
5045 | /* create an SV with the name as argument */ | |
5046 | sv_name = newSVpvn(name, endbrace - name); | |
5047 | ||
5048 | if (!table || !(PL_hints & HINT_LOCALIZE_HH)) { | |
5049 | vFAIL2("Constant(\\N{%s}) unknown: " | |
5050 | "(possibly a missing \"use charnames ...\")", | |
5051 | SvPVX(sv_name)); | |
5052 | } | |
5053 | if (!cvp || !SvOK(*cvp)) { /* when $^H{charnames} = undef; */ | |
5054 | vFAIL2("Constant(\\N{%s}): " | |
5055 | "$^H{charnames} is not defined",SvPVX(sv_name)); | |
5056 | } | |
5057 | ||
5058 | ||
5059 | ||
5060 | if (!RExC_charnames) { | |
5061 | /* make sure our cache is allocated */ | |
5062 | RExC_charnames = newHV(); | |
5063 | } | |
5064 | /* see if we have looked this one up before */ | |
5065 | he_str = hv_fetch_ent( RExC_charnames, sv_name, 0, 0 ); | |
5066 | if ( he_str ) { | |
5067 | sv_str = HeVAL(he_str); | |
5068 | cached = 1; | |
5069 | } else { | |
5070 | dSP ; | |
5071 | ||
5072 | ENTER ; | |
5073 | SAVETMPS ; | |
5074 | PUSHMARK(SP) ; | |
5075 | ||
5076 | XPUSHs(sv_name); | |
5077 | ||
5078 | PUTBACK ; | |
5079 | ||
5080 | count= call_sv(cv, G_SCALAR); | |
5081 | ||
5082 | if (count == 1) { /* XXXX is this right? dmq */ | |
5083 | sv_str = POPs; | |
5084 | SvREFCNT_inc_simple_void(sv_str); | |
5085 | } | |
5086 | ||
5087 | SPAGAIN ; | |
5088 | PUTBACK ; | |
5089 | FREETMPS ; | |
5090 | LEAVE ; | |
5091 | ||
5092 | if ( !sv_str || !SvOK(sv_str) ) { | |
5093 | vFAIL2("Constant(\\N{%s}): Call to &{$^H{charnames}} " | |
5094 | "did not return a defined value",SvPVX(sv_name)); | |
5095 | } | |
5096 | if (hv_store_ent( RExC_charnames, sv_name, sv_str, 0)) | |
5097 | cached = 1; | |
5098 | } | |
5099 | } | |
5100 | if (valuep) { | |
5101 | char *p = SvPV(sv_str, len); | |
5102 | if (len) { | |
5103 | STRLEN numlen = 1; | |
5104 | if ( SvUTF8(sv_str) ) { | |
196f1508 | 5105 | *valuep = utf8_to_uvchr((U8*)p, &numlen); |
fc8cd66c YO |
5106 | if (*valuep > 0x7F) |
5107 | RExC_utf8 = 1; | |
5108 | /* XXXX | |
5109 | We have to turn on utf8 for high bit chars otherwise | |
5110 | we get failures with | |
5111 | ||
5112 | "ss" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i | |
5113 | "SS" =~ /[\N{LATIN SMALL LETTER SHARP S}]/i | |
5114 | ||
5115 | This is different from what \x{} would do with the same | |
5116 | codepoint, where the condition is > 0xFF. | |
5117 | - dmq | |
5118 | */ | |
5119 | ||
5120 | ||
5121 | } else { | |
5122 | *valuep = (UV)*p; | |
5123 | /* warn if we havent used the whole string? */ | |
5124 | } | |
5125 | if (numlen<len && SIZE_ONLY && ckWARN(WARN_REGEXP)) { | |
5126 | vWARN2(RExC_parse, | |
5127 | "Ignoring excess chars from \\N{%s} in character class", | |
5128 | SvPVX(sv_name) | |
5129 | ); | |
5130 | } | |
5131 | } else if (SIZE_ONLY && ckWARN(WARN_REGEXP)) { | |
5132 | vWARN2(RExC_parse, | |
5133 | "Ignoring zero length \\N{%s} in character class", | |
5134 | SvPVX(sv_name) | |
5135 | ); | |
5136 | } | |
5137 | if (sv_name) | |
5138 | SvREFCNT_dec(sv_name); | |
5139 | if (!cached) | |
5140 | SvREFCNT_dec(sv_str); | |
5141 | return len ? NULL : (regnode *)&len; | |
5142 | } else if(SvCUR(sv_str)) { | |
5143 | ||
5144 | char *s; | |
5145 | char *p, *pend; | |
5146 | STRLEN charlen = 1; | |
5147 | char * parse_start = name-3; /* needed for the offsets */ | |
5148 | GET_RE_DEBUG_FLAGS_DECL; /* needed for the offsets */ | |
5149 | ||
5150 | ret = reg_node(pRExC_state, | |
5151 | (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT)); | |
5152 | s= STRING(ret); | |
5153 | ||
5154 | if ( RExC_utf8 && !SvUTF8(sv_str) ) { | |
5155 | sv_utf8_upgrade(sv_str); | |
5156 | } else if ( !RExC_utf8 && SvUTF8(sv_str) ) { | |
5157 | RExC_utf8= 1; | |
5158 | } | |
5159 | ||
5160 | p = SvPV(sv_str, len); | |
5161 | pend = p + len; | |
5162 | /* len is the length written, charlen is the size the char read */ | |
5163 | for ( len = 0; p < pend; p += charlen ) { | |
5164 | if (UTF) { | |
196f1508 | 5165 | UV uvc = utf8_to_uvchr((U8*)p, &charlen); |
fc8cd66c YO |
5166 | if (FOLD) { |
5167 | STRLEN foldlen,numlen; | |
5168 | U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf; | |
5169 | uvc = toFOLD_uni(uvc, tmpbuf, &foldlen); | |
5170 | /* Emit all the Unicode characters. */ | |
5171 | ||
5172 | for (foldbuf = tmpbuf; | |
5173 | foldlen; | |
5174 | foldlen -= numlen) | |
5175 | { | |
5176 | uvc = utf8_to_uvchr(foldbuf, &numlen); | |
5177 | if (numlen > 0) { | |
5178 | const STRLEN unilen = reguni(pRExC_state, uvc, s); | |
5179 | s += unilen; | |
5180 | len += unilen; | |
5181 | /* In EBCDIC the numlen | |
5182 | * and unilen can differ. */ | |
5183 | foldbuf += numlen; | |
5184 | if (numlen >= foldlen) | |
5185 | break; | |
5186 | } | |
5187 | else | |
5188 | break; /* "Can't happen." */ | |
5189 | } | |
5190 | } else { | |
5191 | const STRLEN unilen = reguni(pRExC_state, uvc, s); | |
5192 | if (unilen > 0) { | |
5193 | s += unilen; | |
5194 | len += unilen; | |
5195 | } | |
5196 | } | |
5197 | } else { | |
5198 | len++; | |
5199 | REGC(*p, s++); | |
5200 | } | |
5201 | } | |
5202 | if (SIZE_ONLY) { | |
5203 | RExC_size += STR_SZ(len); | |
5204 | } else { | |
5205 | STR_LEN(ret) = len; | |
5206 | RExC_emit += STR_SZ(len); | |
5207 | } | |
5208 | Set_Node_Cur_Length(ret); /* MJD */ | |
5209 | RExC_parse--; | |
5210 | nextchar(pRExC_state); | |
5211 | } else { | |
5212 | ret = reg_node(pRExC_state,NOTHING); | |
5213 | } | |
5214 | if (!cached) { | |
5215 | SvREFCNT_dec(sv_str); | |
5216 | } | |
5217 | if (sv_name) { | |
5218 | SvREFCNT_dec(sv_name); | |
5219 | } | |
5220 | return ret; | |
5221 | ||
5222 | } | |
5223 | ||
5224 | ||
5225 | ||
a687059c LW |
5226 | /* |
5227 | - regatom - the lowest level | |
5228 | * | |
5229 | * Optimization: gobbles an entire sequence of ordinary characters so that | |
5230 | * it can turn them into a single node, which is smaller to store and | |
5231 | * faster to run. Backslashed characters are exceptions, each becoming a | |
5232 | * separate node; the code is simpler that way and it's not worth fixing. | |
5233 | * | |
7f6f358c YO |
5234 | * [Yes, it is worth fixing, some scripts can run twice the speed.] |
5235 | * [It looks like its ok, as in S_study_chunk we merge adjacent EXACT nodes] | |
5236 | */ | |
76e3520e | 5237 | STATIC regnode * |
3dab1dad | 5238 | S_regatom(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth) |
a687059c | 5239 | { |
97aff369 | 5240 | dVAR; |
cbbf8932 | 5241 | register regnode *ret = NULL; |
a0d0e21e | 5242 | I32 flags; |
45948336 | 5243 | char *parse_start = RExC_parse; |
3dab1dad YO |
5244 | GET_RE_DEBUG_FLAGS_DECL; |
5245 | DEBUG_PARSE("atom"); | |
a0d0e21e LW |
5246 | *flagp = WORST; /* Tentatively. */ |
5247 | ||
5248 | tryagain: | |
830247a4 | 5249 | switch (*RExC_parse) { |
a0d0e21e | 5250 | case '^': |
830247a4 IZ |
5251 | RExC_seen_zerolen++; |
5252 | nextchar(pRExC_state); | |
e2509266 | 5253 | if (RExC_flags & PMf_MULTILINE) |
830247a4 | 5254 | ret = reg_node(pRExC_state, MBOL); |
e2509266 | 5255 | else if (RExC_flags & PMf_SINGLELINE) |
830247a4 | 5256 | ret = reg_node(pRExC_state, SBOL); |
a0d0e21e | 5257 | else |
830247a4 | 5258 | ret = reg_node(pRExC_state, BOL); |
fac92740 | 5259 | Set_Node_Length(ret, 1); /* MJD */ |
a0d0e21e LW |
5260 | break; |
5261 | case '$': | |
830247a4 | 5262 | nextchar(pRExC_state); |
b81d288d | 5263 | if (*RExC_parse) |
830247a4 | 5264 | RExC_seen_zerolen++; |
e2509266 | 5265 | if (RExC_flags & PMf_MULTILINE) |
830247a4 | 5266 | ret = reg_node(pRExC_state, MEOL); |
e2509266 | 5267 | else if (RExC_flags & PMf_SINGLELINE) |
830247a4 | 5268 | ret = reg_node(pRExC_state, SEOL); |
a0d0e21e | 5269 | else |
830247a4 | 5270 | ret = reg_node(pRExC_state, EOL); |
fac92740 | 5271 | Set_Node_Length(ret, 1); /* MJD */ |
a0d0e21e LW |
5272 | break; |
5273 | case '.': | |
830247a4 | 5274 | nextchar(pRExC_state); |
e2509266 | 5275 | if (RExC_flags & PMf_SINGLELINE) |
ffc61ed2 JH |
5276 | ret = reg_node(pRExC_state, SANY); |
5277 | else | |
5278 | ret = reg_node(pRExC_state, REG_ANY); | |
5279 | *flagp |= HASWIDTH|SIMPLE; | |
830247a4 | 5280 | RExC_naughty++; |
fac92740 | 5281 | Set_Node_Length(ret, 1); /* MJD */ |
a0d0e21e LW |
5282 | break; |
5283 | case '[': | |
b45f050a | 5284 | { |
3dab1dad YO |
5285 | char * const oregcomp_parse = ++RExC_parse; |
5286 | ret = regclass(pRExC_state,depth+1); | |
830247a4 IZ |
5287 | if (*RExC_parse != ']') { |
5288 | RExC_parse = oregcomp_parse; | |
b45f050a JF |
5289 | vFAIL("Unmatched ["); |
5290 | } | |
830247a4 | 5291 | nextchar(pRExC_state); |
a0d0e21e | 5292 | *flagp |= HASWIDTH|SIMPLE; |
fac92740 | 5293 | Set_Node_Length(ret, RExC_parse - oregcomp_parse + 1); /* MJD */ |
a0d0e21e | 5294 | break; |
b45f050a | 5295 | } |
a0d0e21e | 5296 | case '(': |
830247a4 | 5297 | nextchar(pRExC_state); |
3dab1dad | 5298 | ret = reg(pRExC_state, 1, &flags,depth+1); |
a0d0e21e | 5299 | if (ret == NULL) { |
bf93d4cc | 5300 | if (flags & TRYAGAIN) { |
830247a4 | 5301 | if (RExC_parse == RExC_end) { |
bf93d4cc GS |
5302 | /* Make parent create an empty node if needed. */ |
5303 | *flagp |= TRYAGAIN; | |
5304 | return(NULL); | |
5305 | } | |
a0d0e21e | 5306 | goto tryagain; |
bf93d4cc | 5307 | } |
a0d0e21e LW |
5308 | return(NULL); |
5309 | } | |
c277df42 | 5310 | *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE); |
a0d0e21e LW |
5311 | break; |
5312 | case '|': | |
5313 | case ')': | |
5314 | if (flags & TRYAGAIN) { | |
5315 | *flagp |= TRYAGAIN; | |
5316 | return NULL; | |
5317 | } | |
b45f050a | 5318 | vFAIL("Internal urp"); |
a0d0e21e LW |
5319 | /* Supposed to be caught earlier. */ |
5320 | break; | |
85afd4ae | 5321 | case '{': |
830247a4 IZ |
5322 | if (!regcurly(RExC_parse)) { |
5323 | RExC_parse++; | |
85afd4ae CS |
5324 | goto defchar; |
5325 | } | |
5326 | /* FALL THROUGH */ | |
a0d0e21e LW |
5327 | case '?': |
5328 | case '+': | |
5329 | case '*': | |
830247a4 | 5330 | RExC_parse++; |
b45f050a | 5331 | vFAIL("Quantifier follows nothing"); |
a0d0e21e LW |
5332 | break; |
5333 | case '\\': | |
830247a4 | 5334 | switch (*++RExC_parse) { |
a0d0e21e | 5335 | case 'A': |
830247a4 IZ |
5336 | RExC_seen_zerolen++; |
5337 | ret = reg_node(pRExC_state, SBOL); | |
a0d0e21e | 5338 | *flagp |= SIMPLE; |
830247a4 | 5339 | nextchar(pRExC_state); |
fac92740 | 5340 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
5341 | break; |
5342 | case 'G': | |
830247a4 IZ |
5343 | ret = reg_node(pRExC_state, GPOS); |
5344 | RExC_seen |= REG_SEEN_GPOS; | |
a0d0e21e | 5345 | *flagp |= SIMPLE; |
830247a4 | 5346 | nextchar(pRExC_state); |
fac92740 | 5347 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
5348 | break; |
5349 | case 'Z': | |
830247a4 | 5350 | ret = reg_node(pRExC_state, SEOL); |
a0d0e21e | 5351 | *flagp |= SIMPLE; |
a1917ab9 | 5352 | RExC_seen_zerolen++; /* Do not optimize RE away */ |
830247a4 | 5353 | nextchar(pRExC_state); |
a0d0e21e | 5354 | break; |
b85d18e9 | 5355 | case 'z': |
830247a4 | 5356 | ret = reg_node(pRExC_state, EOS); |
b85d18e9 | 5357 | *flagp |= SIMPLE; |
830247a4 IZ |
5358 | RExC_seen_zerolen++; /* Do not optimize RE away */ |
5359 | nextchar(pRExC_state); | |
fac92740 | 5360 | Set_Node_Length(ret, 2); /* MJD */ |
b85d18e9 | 5361 | break; |
4a2d328f | 5362 | case 'C': |
f33976b4 DB |
5363 | ret = reg_node(pRExC_state, CANY); |
5364 | RExC_seen |= REG_SEEN_CANY; | |
a0ed51b3 | 5365 | *flagp |= HASWIDTH|SIMPLE; |
830247a4 | 5366 | nextchar(pRExC_state); |
fac92740 | 5367 | Set_Node_Length(ret, 2); /* MJD */ |
a0ed51b3 LW |
5368 | break; |
5369 | case 'X': | |
830247a4 | 5370 | ret = reg_node(pRExC_state, CLUMP); |
a0ed51b3 | 5371 | *flagp |= HASWIDTH; |
830247a4 | 5372 | nextchar(pRExC_state); |
fac92740 | 5373 | Set_Node_Length(ret, 2); /* MJD */ |
a0ed51b3 | 5374 | break; |
a0d0e21e | 5375 | case 'w': |
eb160463 | 5376 | ret = reg_node(pRExC_state, (U8)(LOC ? ALNUML : ALNUM)); |
a0d0e21e | 5377 | *flagp |= HASWIDTH|SIMPLE; |
830247a4 | 5378 | nextchar(pRExC_state); |
fac92740 | 5379 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
5380 | break; |
5381 | case 'W': | |
eb160463 | 5382 | ret = reg_node(pRExC_state, (U8)(LOC ? NALNUML : NALNUM)); |
a0d0e21e | 5383 | *flagp |= HASWIDTH|SIMPLE; |
830247a4 | 5384 | nextchar(pRExC_state); |
fac92740 | 5385 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
5386 | break; |
5387 | case 'b': | |
830247a4 IZ |
5388 | RExC_seen_zerolen++; |
5389 | RExC_seen |= REG_SEEN_LOOKBEHIND; | |
eb160463 | 5390 | ret = reg_node(pRExC_state, (U8)(LOC ? BOUNDL : BOUND)); |
a0d0e21e | 5391 | *flagp |= SIMPLE; |
830247a4 | 5392 | nextchar(pRExC_state); |
fac92740 | 5393 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
5394 | break; |
5395 | case 'B': | |
830247a4 IZ |
5396 | RExC_seen_zerolen++; |
5397 | RExC_seen |= REG_SEEN_LOOKBEHIND; | |
eb160463 | 5398 | ret = reg_node(pRExC_state, (U8)(LOC ? NBOUNDL : NBOUND)); |
a0d0e21e | 5399 | *flagp |= SIMPLE; |
830247a4 | 5400 | nextchar(pRExC_state); |
fac92740 | 5401 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
5402 | break; |
5403 | case 's': | |
eb160463 | 5404 | ret = reg_node(pRExC_state, (U8)(LOC ? SPACEL : SPACE)); |
a0d0e21e | 5405 | *flagp |= HASWIDTH|SIMPLE; |
830247a4 | 5406 | nextchar(pRExC_state); |
fac92740 | 5407 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
5408 | break; |
5409 | case 'S': | |
eb160463 | 5410 | ret = reg_node(pRExC_state, (U8)(LOC ? NSPACEL : NSPACE)); |
a0d0e21e | 5411 | *flagp |= HASWIDTH|SIMPLE; |
830247a4 | 5412 | nextchar(pRExC_state); |
fac92740 | 5413 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
5414 | break; |
5415 | case 'd': | |
ffc61ed2 | 5416 | ret = reg_node(pRExC_state, DIGIT); |
a0d0e21e | 5417 | *flagp |= HASWIDTH|SIMPLE; |
830247a4 | 5418 | nextchar(pRExC_state); |
fac92740 | 5419 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e LW |
5420 | break; |
5421 | case 'D': | |
ffc61ed2 | 5422 | ret = reg_node(pRExC_state, NDIGIT); |
a0d0e21e | 5423 | *flagp |= HASWIDTH|SIMPLE; |
830247a4 | 5424 | nextchar(pRExC_state); |
fac92740 | 5425 | Set_Node_Length(ret, 2); /* MJD */ |
a0d0e21e | 5426 | break; |
a14b48bc LW |
5427 | case 'p': |
5428 | case 'P': | |
3568d838 | 5429 | { |
3dab1dad | 5430 | char* const oldregxend = RExC_end; |
ccb2c380 | 5431 | char* parse_start = RExC_parse - 2; |
a14b48bc | 5432 | |
830247a4 | 5433 | if (RExC_parse[1] == '{') { |
3568d838 | 5434 | /* a lovely hack--pretend we saw [\pX] instead */ |
830247a4 IZ |
5435 | RExC_end = strchr(RExC_parse, '}'); |
5436 | if (!RExC_end) { | |
3dab1dad | 5437 | const U8 c = (U8)*RExC_parse; |
830247a4 IZ |
5438 | RExC_parse += 2; |
5439 | RExC_end = oldregxend; | |
0da60cf5 | 5440 | vFAIL2("Missing right brace on \\%c{}", c); |
b45f050a | 5441 | } |
830247a4 | 5442 | RExC_end++; |
a14b48bc | 5443 | } |
af6f566e | 5444 | else { |
830247a4 | 5445 | RExC_end = RExC_parse + 2; |
af6f566e HS |
5446 | if (RExC_end > oldregxend) |
5447 | RExC_end = oldregxend; | |
5448 | } | |
830247a4 | 5449 | RExC_parse--; |
a14b48bc | 5450 | |
3dab1dad | 5451 | ret = regclass(pRExC_state,depth+1); |
a14b48bc | 5452 | |
830247a4 IZ |
5453 | RExC_end = oldregxend; |
5454 | RExC_parse--; | |
ccb2c380 MP |
5455 | |
5456 | Set_Node_Offset(ret, parse_start + 2); | |
5457 | Set_Node_Cur_Length(ret); | |
830247a4 | 5458 | nextchar(pRExC_state); |
a14b48bc LW |
5459 | *flagp |= HASWIDTH|SIMPLE; |
5460 | } | |
5461 | break; | |
fc8cd66c YO |
5462 | case 'N': |
5463 | /* Handle \N{NAME} here and not below because it can be | |
5464 | multicharacter. join_exact() will join them up later on. | |
5465 | Also this makes sure that things like /\N{BLAH}+/ and | |
5466 | \N{BLAH} being multi char Just Happen. dmq*/ | |
5467 | ++RExC_parse; | |
5468 | ret= reg_namedseq(pRExC_state, NULL); | |
5469 | break; | |
a0d0e21e LW |
5470 | case 'n': |
5471 | case 'r': | |
5472 | case 't': | |
5473 | case 'f': | |
5474 | case 'e': | |
5475 | case 'a': | |
5476 | case 'x': | |
5477 | case 'c': | |
5478 | case '0': | |
5479 | goto defchar; | |
5480 | case '1': case '2': case '3': case '4': | |
5481 | case '5': case '6': case '7': case '8': case '9': | |
5482 | { | |
1df70142 | 5483 | const I32 num = atoi(RExC_parse); |
a0d0e21e | 5484 | |
830247a4 | 5485 | if (num > 9 && num >= RExC_npar) |
a0d0e21e LW |
5486 | goto defchar; |
5487 | else { | |
3dab1dad | 5488 | char * const parse_start = RExC_parse - 1; /* MJD */ |
830247a4 IZ |
5489 | while (isDIGIT(*RExC_parse)) |
5490 | RExC_parse++; | |
b45f050a | 5491 | |
eb160463 | 5492 | if (!SIZE_ONLY && num > (I32)RExC_rx->nparens) |
9baa0206 | 5493 | vFAIL("Reference to nonexistent group"); |
830247a4 | 5494 | RExC_sawback = 1; |
eb160463 GS |
5495 | ret = reganode(pRExC_state, |
5496 | (U8)(FOLD ? (LOC ? REFFL : REFF) : REF), | |
5497 | num); | |
a0d0e21e | 5498 | *flagp |= HASWIDTH; |
2af232bd | 5499 | |
fac92740 | 5500 | /* override incorrect value set in reganode MJD */ |
2af232bd | 5501 | Set_Node_Offset(ret, parse_start+1); |
fac92740 | 5502 | Set_Node_Cur_Length(ret); /* MJD */ |
830247a4 IZ |
5503 | RExC_parse--; |
5504 | nextchar(pRExC_state); | |
a0d0e21e LW |
5505 | } |
5506 | } | |
5507 | break; | |
5508 | case '\0': | |
830247a4 | 5509 | if (RExC_parse >= RExC_end) |
b45f050a | 5510 | FAIL("Trailing \\"); |
a0d0e21e LW |
5511 | /* FALL THROUGH */ |
5512 | default: | |
a0288114 | 5513 | /* Do not generate "unrecognized" warnings here, we fall |
c9f97d15 | 5514 | back into the quick-grab loop below */ |
45948336 | 5515 | parse_start--; |
a0d0e21e LW |
5516 | goto defchar; |
5517 | } | |
5518 | break; | |
4633a7c4 LW |
5519 | |
5520 | case '#': | |
e2509266 | 5521 | if (RExC_flags & PMf_EXTENDED) { |
3dab1dad YO |
5522 | while (RExC_parse < RExC_end && *RExC_parse != '\n') |
5523 | RExC_parse++; | |
830247a4 | 5524 | if (RExC_parse < RExC_end) |
4633a7c4 LW |
5525 | goto tryagain; |
5526 | } | |
5527 | /* FALL THROUGH */ | |
5528 | ||
a0d0e21e | 5529 | default: { |
ba210ebe | 5530 | register STRLEN len; |
58ae7d3f | 5531 | register UV ender; |
a0d0e21e | 5532 | register char *p; |
3dab1dad | 5533 | char *s; |
80aecb99 | 5534 | STRLEN foldlen; |
89ebb4a3 | 5535 | U8 tmpbuf[UTF8_MAXBYTES_CASE+1], *foldbuf; |
f06dbbb7 JH |
5536 | |
5537 | parse_start = RExC_parse - 1; | |
a0d0e21e | 5538 | |
830247a4 | 5539 | RExC_parse++; |
a0d0e21e LW |
5540 | |
5541 | defchar: | |
58ae7d3f | 5542 | ender = 0; |
eb160463 GS |
5543 | ret = reg_node(pRExC_state, |
5544 | (U8)(FOLD ? (LOC ? EXACTFL : EXACTF) : EXACT)); | |
cd439c50 | 5545 | s = STRING(ret); |
830247a4 IZ |
5546 | for (len = 0, p = RExC_parse - 1; |
5547 | len < 127 && p < RExC_end; | |
a0d0e21e LW |
5548 | len++) |
5549 | { | |
3dab1dad | 5550 | char * const oldp = p; |
5b5a24f7 | 5551 | |
e2509266 | 5552 | if (RExC_flags & PMf_EXTENDED) |
830247a4 | 5553 | p = regwhite(p, RExC_end); |
a0d0e21e LW |
5554 | switch (*p) { |
5555 | case '^': | |
5556 | case '$': | |
5557 | case '.': | |
5558 | case '[': | |
5559 | case '(': | |
5560 | case ')': | |
5561 | case '|': | |
5562 | goto loopdone; | |
5563 | case '\\': | |
5564 | switch (*++p) { | |
5565 | case 'A': | |
1ed8eac0 JF |
5566 | case 'C': |
5567 | case 'X': | |
a0d0e21e LW |
5568 | case 'G': |
5569 | case 'Z': | |
b85d18e9 | 5570 | case 'z': |
a0d0e21e LW |
5571 | case 'w': |
5572 | case 'W': | |
5573 | case 'b': | |
5574 | case 'B': | |
5575 | case 's': | |
5576 | case 'S': | |
5577 | case 'd': | |
5578 | case 'D': | |
a14b48bc LW |
5579 | case 'p': |
5580 | case 'P': | |
fc8cd66c | 5581 | case 'N': |
a0d0e21e LW |
5582 | --p; |
5583 | goto loopdone; | |
5584 | case 'n': | |
5585 | ender = '\n'; | |
5586 | p++; | |
a687059c | 5587 | break; |
a0d0e21e LW |
5588 | case 'r': |
5589 | ender = '\r'; | |
5590 | p++; | |
a687059c | 5591 | break; |
a0d0e21e LW |
5592 | case 't': |
5593 | ender = '\t'; | |
5594 | p++; | |
a687059c | 5595 | break; |
a0d0e21e LW |
5596 | case 'f': |
5597 | ender = '\f'; | |
5598 | p++; | |
a687059c | 5599 | break; |
a0d0e21e | 5600 | case 'e': |
c7f1f016 | 5601 | ender = ASCII_TO_NATIVE('\033'); |
a0d0e21e | 5602 | p++; |
a687059c | 5603 | break; |
a0d0e21e | 5604 | case 'a': |
c7f1f016 | 5605 | ender = ASCII_TO_NATIVE('\007'); |
a0d0e21e | 5606 | p++; |
a687059c | 5607 | break; |
a0d0e21e | 5608 | case 'x': |
a0ed51b3 | 5609 | if (*++p == '{') { |
1df70142 | 5610 | char* const e = strchr(p, '}'); |
b81d288d | 5611 | |
b45f050a | 5612 | if (!e) { |
830247a4 | 5613 | RExC_parse = p + 1; |
b45f050a JF |
5614 | vFAIL("Missing right brace on \\x{}"); |
5615 | } | |
de5f0749 | 5616 | else { |
a4c04bdc NC |
5617 | I32 flags = PERL_SCAN_ALLOW_UNDERSCORES |
5618 | | PERL_SCAN_DISALLOW_PREFIX; | |
1df70142 | 5619 | STRLEN numlen = e - p - 1; |
53305cf1 | 5620 | ender = grok_hex(p + 1, &numlen, &flags, NULL); |
aaa80028 JH |
5621 | if (ender > 0xff) |
5622 | RExC_utf8 = 1; | |
a0ed51b3 LW |
5623 | p = e + 1; |
5624 | } | |
a0ed51b3 LW |
5625 | } |
5626 | else { | |
a4c04bdc | 5627 | I32 flags = PERL_SCAN_DISALLOW_PREFIX; |
1df70142 | 5628 | STRLEN numlen = 2; |
53305cf1 | 5629 | ender = grok_hex(p, &numlen, &flags, NULL); |
a0ed51b3 LW |
5630 | p += numlen; |
5631 | } | |
a687059c | 5632 | break; |
a0d0e21e LW |
5633 | case 'c': |
5634 | p++; | |
bbce6d69 | 5635 | ender = UCHARAT(p++); |
5636 | ender = toCTRL(ender); | |
a687059c | 5637 | break; |
a0d0e21e LW |
5638 | case '0': case '1': case '2': case '3':case '4': |
5639 | case '5': case '6': case '7': case '8':case '9': | |
5640 | if (*p == '0' || | |
830247a4 | 5641 | (isDIGIT(p[1]) && atoi(p) >= RExC_npar) ) { |
53305cf1 | 5642 | I32 flags = 0; |
1df70142 | 5643 | STRLEN numlen = 3; |
53305cf1 | 5644 | ender = grok_oct(p, &numlen, &flags, NULL); |
a0d0e21e LW |
5645 | p += numlen; |
5646 | } | |
5647 | else { | |
5648 | --p; | |
5649 | goto loopdone; | |
a687059c LW |
5650 | } |
5651 | break; | |
a0d0e21e | 5652 | case '\0': |
830247a4 | 5653 | if (p >= RExC_end) |
b45f050a | 5654 | FAIL("Trailing \\"); |
a687059c | 5655 | /* FALL THROUGH */ |
a0d0e21e | 5656 | default: |
041457d9 | 5657 | if (!SIZE_ONLY&& isALPHA(*p) && ckWARN(WARN_REGEXP)) |
4193bef7 | 5658 | vWARN2(p + 1, "Unrecognized escape \\%c passed through", UCHARAT(p)); |
a0ed51b3 | 5659 | goto normal_default; |
a0d0e21e LW |
5660 | } |
5661 | break; | |
a687059c | 5662 | default: |
a0ed51b3 | 5663 | normal_default: |
fd400ab9 | 5664 | if (UTF8_IS_START(*p) && UTF) { |
1df70142 | 5665 | STRLEN numlen; |
5e12f4fb | 5666 | ender = utf8n_to_uvchr((U8*)p, RExC_end - p, |
9f7f3913 | 5667 | &numlen, UTF8_ALLOW_DEFAULT); |
a0ed51b3 LW |
5668 | p += numlen; |
5669 | } | |
5670 | else | |
5671 | ender = *p++; | |
a0d0e21e | 5672 | break; |
a687059c | 5673 | } |
e2509266 | 5674 | if (RExC_flags & PMf_EXTENDED) |
830247a4 | 5675 | p = regwhite(p, RExC_end); |
60a8b682 JH |
5676 | if (UTF && FOLD) { |
5677 | /* Prime the casefolded buffer. */ | |
ac7e0132 | 5678 | ender = toFOLD_uni(ender, tmpbuf, &foldlen); |
60a8b682 | 5679 | } |
a0d0e21e LW |
5680 | if (ISMULT2(p)) { /* Back off on ?+*. */ |
5681 | if (len) | |
5682 | p = oldp; | |
16ea2a2e | 5683 | else if (UTF) { |
80aecb99 | 5684 | if (FOLD) { |
60a8b682 | 5685 | /* Emit all the Unicode characters. */ |
1df70142 | 5686 | STRLEN numlen; |
80aecb99 JH |
5687 | for (foldbuf = tmpbuf; |
5688 | foldlen; | |
5689 | foldlen -= numlen) { | |
5690 | ender = utf8_to_uvchr(foldbuf, &numlen); | |
9dc45d57 | 5691 | if (numlen > 0) { |
71207a34 | 5692 | const STRLEN unilen = reguni(pRExC_state, ender, s); |
0ebc6274 JH |
5693 | s += unilen; |
5694 | len += unilen; | |
5695 | /* In EBCDIC the numlen | |
5696 | * and unilen can differ. */ | |
9dc45d57 | 5697 | foldbuf += numlen; |
47654450 JH |
5698 | if (numlen >= foldlen) |
5699 | break; | |
9dc45d57 JH |
5700 | } |
5701 | else | |
5702 | break; /* "Can't happen." */ | |
80aecb99 JH |
5703 | } |
5704 | } | |
5705 | else { | |
71207a34 | 5706 | const STRLEN unilen = reguni(pRExC_state, ender, s); |
9ede7db1 | 5707 | if (unilen > 0) { |
0ebc6274 JH |
5708 | s += unilen; |
5709 | len += unilen; | |
9dc45d57 | 5710 | } |
80aecb99 | 5711 | } |
a0ed51b3 | 5712 | } |
a0d0e21e LW |
5713 | else { |
5714 | len++; | |
eb160463 | 5715 | REGC((char)ender, s++); |
a0d0e21e LW |
5716 | } |
5717 | break; | |
a687059c | 5718 | } |
16ea2a2e | 5719 | if (UTF) { |
80aecb99 | 5720 | if (FOLD) { |
60a8b682 | 5721 | /* Emit all the Unicode characters. */ |
1df70142 | 5722 | STRLEN numlen; |
80aecb99 JH |
5723 | for (foldbuf = tmpbuf; |
5724 | foldlen; | |
5725 | foldlen -= numlen) { | |
5726 | ender = utf8_to_uvchr(foldbuf, &numlen); | |
9dc45d57 | 5727 | if (numlen > 0) { |
71207a34 | 5728 | const STRLEN unilen = reguni(pRExC_state, ender, s); |
0ebc6274 JH |
5729 | len += unilen; |
5730 | s += unilen; | |
5731 | /* In EBCDIC the numlen | |
5732 | * and unilen can differ. */ | |
9dc45d57 | 5733 | foldbuf += numlen; |
47654450 JH |
5734 | if (numlen >= foldlen) |
5735 | break; | |
9dc45d57 JH |
5736 | } |
5737 | else | |
5738 | break; | |
80aecb99 JH |
5739 | } |
5740 | } | |
5741 | else { | |
71207a34 | 5742 | const STRLEN unilen = reguni(pRExC_state, ender, s); |
9ede7db1 | 5743 | if (unilen > 0) { |
0ebc6274 JH |
5744 | s += unilen; |
5745 | len += unilen; | |
9dc45d57 | 5746 | } |
80aecb99 JH |
5747 | } |
5748 | len--; | |
a0ed51b3 LW |
5749 | } |
5750 | else | |
eb160463 | 5751 | REGC((char)ender, s++); |
a0d0e21e LW |
5752 | } |
5753 | loopdone: | |
830247a4 | 5754 | RExC_parse = p - 1; |
fac92740 | 5755 | Set_Node_Cur_Length(ret); /* MJD */ |
830247a4 | 5756 | nextchar(pRExC_state); |
793db0cb JH |
5757 | { |
5758 | /* len is STRLEN which is unsigned, need to copy to signed */ | |
5759 | IV iv = len; | |
5760 | if (iv < 0) | |
5761 | vFAIL("Internal disaster"); | |
5762 | } | |
a0d0e21e LW |
5763 | if (len > 0) |
5764 | *flagp |= HASWIDTH; | |
090f7165 | 5765 | if (len == 1 && UNI_IS_INVARIANT(ender)) |
a0d0e21e | 5766 | *flagp |= SIMPLE; |
3dab1dad | 5767 | |
cd439c50 | 5768 | if (SIZE_ONLY) |
830247a4 | 5769 | RExC_size += STR_SZ(len); |
3dab1dad YO |
5770 | else { |
5771 | STR_LEN(ret) = len; | |
830247a4 | 5772 | RExC_emit += STR_SZ(len); |
07be1b83 | 5773 | } |
3dab1dad | 5774 | } |
a0d0e21e LW |
5775 | break; |
5776 | } | |
a687059c | 5777 | |
60a8b682 JH |
5778 | /* If the encoding pragma is in effect recode the text of |
5779 | * any EXACT-kind nodes. */ | |
fc8cd66c | 5780 | if (ret && PL_encoding && PL_regkind[OP(ret)] == EXACT) { |
3dab1dad YO |
5781 | const STRLEN oldlen = STR_LEN(ret); |
5782 | SV * const sv = sv_2mortal(newSVpvn(STRING(ret), oldlen)); | |
d0063567 DK |
5783 | |
5784 | if (RExC_utf8) | |
5785 | SvUTF8_on(sv); | |
5786 | if (sv_utf8_downgrade(sv, TRUE)) { | |
1df70142 AL |
5787 | const char * const s = sv_recode_to_utf8(sv, PL_encoding); |
5788 | const STRLEN newlen = SvCUR(sv); | |
d0063567 DK |
5789 | |
5790 | if (SvUTF8(sv)) | |
5791 | RExC_utf8 = 1; | |
5792 | if (!SIZE_ONLY) { | |
a3621e74 YO |
5793 | GET_RE_DEBUG_FLAGS_DECL; |
5794 | DEBUG_COMPILE_r(PerlIO_printf(Perl_debug_log, "recode %*s to %*s\n", | |
d0063567 DK |
5795 | (int)oldlen, STRING(ret), |
5796 | (int)newlen, s)); | |
5797 | Copy(s, STRING(ret), newlen, char); | |
5798 | STR_LEN(ret) += newlen - oldlen; | |
5799 | RExC_emit += STR_SZ(newlen) - STR_SZ(oldlen); | |
5800 | } else | |
5801 | RExC_size += STR_SZ(newlen) - STR_SZ(oldlen); | |
5802 | } | |
a72c7584 JH |
5803 | } |
5804 | ||
a0d0e21e | 5805 | return(ret); |
a687059c LW |
5806 | } |
5807 | ||
873ef191 | 5808 | STATIC char * |
5f66b61c | 5809 | S_regwhite(char *p, const char *e) |
5b5a24f7 CS |
5810 | { |
5811 | while (p < e) { | |
5812 | if (isSPACE(*p)) | |
5813 | ++p; | |
5814 | else if (*p == '#') { | |
5815 | do { | |
5816 | p++; | |
5817 | } while (p < e && *p != '\n'); | |
5818 | } | |
5819 | else | |
5820 | break; | |
5821 | } | |
5822 | return p; | |
5823 | } | |
5824 | ||
b8c5462f JH |
5825 | /* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]]. |
5826 | Character classes ([:foo:]) can also be negated ([:^foo:]). | |
5827 | Returns a named class id (ANYOF_XXX) if successful, -1 otherwise. | |
5828 | Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed, | |
beeb77fc | 5829 | but trigger failures because they are currently unimplemented. */ |
9a86a77b JH |
5830 | |
5831 | #define POSIXCC_DONE(c) ((c) == ':') | |
5832 | #define POSIXCC_NOTYET(c) ((c) == '=' || (c) == '.') | |
5833 | #define POSIXCC(c) (POSIXCC_DONE(c) || POSIXCC_NOTYET(c)) | |
5834 | ||
b8c5462f | 5835 | STATIC I32 |
830247a4 | 5836 | S_regpposixcc(pTHX_ RExC_state_t *pRExC_state, I32 value) |
620e46c5 | 5837 | { |
97aff369 | 5838 | dVAR; |
936ed897 | 5839 | I32 namedclass = OOB_NAMEDCLASS; |
620e46c5 | 5840 | |
830247a4 | 5841 | if (value == '[' && RExC_parse + 1 < RExC_end && |
620e46c5 | 5842 | /* I smell either [: or [= or [. -- POSIX has been here, right? */ |
9a86a77b | 5843 | POSIXCC(UCHARAT(RExC_parse))) { |
1df70142 | 5844 | const char c = UCHARAT(RExC_parse); |
097eb12c | 5845 | char* const s = RExC_parse++; |
b81d288d | 5846 | |
9a86a77b | 5847 | while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != c) |
830247a4 IZ |
5848 | RExC_parse++; |
5849 | if (RExC_parse == RExC_end) | |
620e46c5 | 5850 | /* Grandfather lone [:, [=, [. */ |
830247a4 | 5851 | RExC_parse = s; |
620e46c5 | 5852 | else { |
3dab1dad | 5853 | const char* const t = RExC_parse++; /* skip over the c */ |
80916619 NC |
5854 | assert(*t == c); |
5855 | ||
9a86a77b | 5856 | if (UCHARAT(RExC_parse) == ']') { |
3dab1dad | 5857 | const char *posixcc = s + 1; |
830247a4 | 5858 | RExC_parse++; /* skip over the ending ] */ |
3dab1dad | 5859 | |
b8c5462f | 5860 | if (*s == ':') { |
1df70142 AL |
5861 | const I32 complement = *posixcc == '^' ? *posixcc++ : 0; |
5862 | const I32 skip = t - posixcc; | |
80916619 NC |
5863 | |
5864 | /* Initially switch on the length of the name. */ | |
5865 | switch (skip) { | |
5866 | case 4: | |
3dab1dad YO |
5867 | if (memEQ(posixcc, "word", 4)) /* this is not POSIX, this is the Perl \w */ |
5868 | namedclass = complement ? ANYOF_NALNUM : ANYOF_ALNUM; | |
cc4319de | 5869 | break; |
80916619 NC |
5870 | case 5: |
5871 | /* Names all of length 5. */ | |
5872 | /* alnum alpha ascii blank cntrl digit graph lower | |
5873 | print punct space upper */ | |
5874 | /* Offset 4 gives the best switch position. */ | |
5875 | switch (posixcc[4]) { | |
5876 | case 'a': | |
3dab1dad YO |
5877 | if (memEQ(posixcc, "alph", 4)) /* alpha */ |
5878 | namedclass = complement ? ANYOF_NALPHA : ANYOF_ALPHA; | |
80916619 NC |
5879 | break; |
5880 | case 'e': | |
3dab1dad YO |
5881 | if (memEQ(posixcc, "spac", 4)) /* space */ |
5882 | namedclass = complement ? ANYOF_NPSXSPC : ANYOF_PSXSPC; | |
80916619 NC |
5883 | break; |
5884 | case 'h': | |
3dab1dad YO |
5885 | if (memEQ(posixcc, "grap", 4)) /* graph */ |
5886 | namedclass = complement ? ANYOF_NGRAPH : ANYOF_GRAPH; | |
80916619 NC |
5887 | break; |
5888 | case 'i': | |
3dab1dad YO |
5889 | if (memEQ(posixcc, "asci", 4)) /* ascii */ |
5890 | namedclass = complement ? ANYOF_NASCII : ANYOF_ASCII; | |
80916619 NC |
5891 | break; |
5892 | case 'k': | |
3dab1dad YO |
5893 | if (memEQ(posixcc, "blan", 4)) /* blank */ |
5894 | namedclass = complement ? ANYOF_NBLANK : ANYOF_BLANK; | |
80916619 NC |
5895 | break; |
5896 | case 'l': | |
3dab1dad YO |
5897 | if (memEQ(posixcc, "cntr", 4)) /* cntrl */ |
5898 | namedclass = complement ? ANYOF_NCNTRL : ANYOF_CNTRL; | |
80916619 NC |
5899 | break; |
5900 | case 'm': | |
3dab1dad YO |
5901 | if (memEQ(posixcc, "alnu", 4)) /* alnum */ |
5902 | namedclass = complement ? ANYOF_NALNUMC : ANYOF_ALNUMC; | |
80916619 NC |
5903 | break; |
5904 | case 'r': | |
3dab1dad YO |
5905 | if (memEQ(posixcc, "lowe", 4)) /* lower */ |
5906 | namedclass = complement ? ANYOF_NLOWER : ANYOF_LOWER; | |
5907 | else if (memEQ(posixcc, "uppe", 4)) /* upper */ | |
5908 | namedclass = complement ? ANYOF_NUPPER : ANYOF_UPPER; | |
80916619 NC |
5909 | break; |
5910 | case 't': | |
3dab1dad YO |
5911 | if (memEQ(posixcc, "digi", 4)) /* digit */ |
5912 | namedclass = complement ? ANYOF_NDIGIT : ANYOF_DIGIT; | |
5913 | else if (memEQ(posixcc, "prin", 4)) /* print */ | |
5914 | namedclass = complement ? ANYOF_NPRINT : ANYOF_PRINT; | |
5915 | else if (memEQ(posixcc, "punc", 4)) /* punct */ | |
5916 | namedclass = complement ? ANYOF_NPUNCT : ANYOF_PUNCT; | |
80916619 | 5917 | break; |
b8c5462f JH |
5918 | } |
5919 | break; | |
80916619 | 5920 | case 6: |
3dab1dad YO |
5921 | if (memEQ(posixcc, "xdigit", 6)) |
5922 | namedclass = complement ? ANYOF_NXDIGIT : ANYOF_XDIGIT; | |
b8c5462f JH |
5923 | break; |
5924 | } | |
80916619 NC |
5925 | |
5926 | if (namedclass == OOB_NAMEDCLASS) | |
b45f050a JF |
5927 | Simple_vFAIL3("POSIX class [:%.*s:] unknown", |
5928 | t - s - 1, s + 1); | |
80916619 NC |
5929 | assert (posixcc[skip] == ':'); |
5930 | assert (posixcc[skip+1] == ']'); | |
b45f050a | 5931 | } else if (!SIZE_ONLY) { |
b8c5462f | 5932 | /* [[=foo=]] and [[.foo.]] are still future. */ |
b45f050a | 5933 | |
830247a4 | 5934 | /* adjust RExC_parse so the warning shows after |
b45f050a | 5935 | the class closes */ |
9a86a77b | 5936 | while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse) != ']') |
830247a4 | 5937 | RExC_parse++; |
b45f050a JF |
5938 | Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c); |
5939 | } | |
b8c5462f JH |
5940 | } else { |
5941 | /* Maternal grandfather: | |
5942 | * "[:" ending in ":" but not in ":]" */ | |
830247a4 | 5943 | RExC_parse = s; |
767d463e | 5944 | } |
620e46c5 JH |
5945 | } |
5946 | } | |
5947 | ||
b8c5462f JH |
5948 | return namedclass; |
5949 | } | |
5950 | ||
5951 | STATIC void | |
830247a4 | 5952 | S_checkposixcc(pTHX_ RExC_state_t *pRExC_state) |
b8c5462f | 5953 | { |
97aff369 | 5954 | dVAR; |
3dab1dad | 5955 | if (POSIXCC(UCHARAT(RExC_parse))) { |
1df70142 AL |
5956 | const char *s = RExC_parse; |
5957 | const char c = *s++; | |
b8c5462f | 5958 | |
3dab1dad | 5959 | while (isALNUM(*s)) |
b8c5462f JH |
5960 | s++; |
5961 | if (*s && c == *s && s[1] == ']') { | |
cd84f5b2 RGS |
5962 | if (ckWARN(WARN_REGEXP)) |
5963 | vWARN3(s+2, | |
5964 | "POSIX syntax [%c %c] belongs inside character classes", | |
5965 | c, c); | |
b45f050a JF |
5966 | |
5967 | /* [[=foo=]] and [[.foo.]] are still future. */ | |
9a86a77b | 5968 | if (POSIXCC_NOTYET(c)) { |
830247a4 | 5969 | /* adjust RExC_parse so the error shows after |
b45f050a | 5970 | the class closes */ |
9a86a77b | 5971 | while (UCHARAT(RExC_parse) && UCHARAT(RExC_parse++) != ']') |
3dab1dad | 5972 | NOOP; |
b45f050a JF |
5973 | Simple_vFAIL3("POSIX syntax [%c %c] is reserved for future extensions", c, c); |
5974 | } | |
b8c5462f JH |
5975 | } |
5976 | } | |
620e46c5 JH |
5977 | } |
5978 | ||
7f6f358c YO |
5979 | |
5980 | /* | |
5981 | parse a class specification and produce either an ANYOF node that | |
5982 | matches the pattern. If the pattern matches a single char only and | |
5983 | that char is < 256 then we produce an EXACT node instead. | |
5984 | */ | |
76e3520e | 5985 | STATIC regnode * |
3dab1dad | 5986 | S_regclass(pTHX_ RExC_state_t *pRExC_state, U32 depth) |
a687059c | 5987 | { |
97aff369 | 5988 | dVAR; |
9ef43ace | 5989 | register UV value = 0; |
9a86a77b | 5990 | register UV nextvalue; |
3568d838 | 5991 | register IV prevvalue = OOB_UNICODE; |
ffc61ed2 | 5992 | register IV range = 0; |
c277df42 | 5993 | register regnode *ret; |
ba210ebe | 5994 | STRLEN numlen; |
ffc61ed2 | 5995 | IV namedclass; |
cbbf8932 | 5996 | char *rangebegin = NULL; |
936ed897 | 5997 | bool need_class = 0; |
c445ea15 | 5998 | SV *listsv = NULL; |
ffc61ed2 | 5999 | UV n; |
9e55ce06 | 6000 | bool optimize_invert = TRUE; |
cbbf8932 | 6001 | AV* unicode_alternate = NULL; |
1b2d223b JH |
6002 | #ifdef EBCDIC |
6003 | UV literal_endpoint = 0; | |
6004 | #endif | |
7f6f358c | 6005 | UV stored = 0; /* number of chars stored in the class */ |
ffc61ed2 | 6006 | |
3dab1dad | 6007 | regnode * const orig_emit = RExC_emit; /* Save the original RExC_emit in |
7f6f358c | 6008 | case we need to change the emitted regop to an EXACT. */ |
07be1b83 | 6009 | const char * orig_parse = RExC_parse; |
72f13be8 | 6010 | GET_RE_DEBUG_FLAGS_DECL; |
76e84362 SH |
6011 | #ifndef DEBUGGING |
6012 | PERL_UNUSED_ARG(depth); | |
6013 | #endif | |
72f13be8 | 6014 | |
3dab1dad | 6015 | DEBUG_PARSE("clas"); |
7f6f358c YO |
6016 | |
6017 | /* Assume we are going to generate an ANYOF node. */ | |
ffc61ed2 JH |
6018 | ret = reganode(pRExC_state, ANYOF, 0); |
6019 | ||
6020 | if (!SIZE_ONLY) | |
6021 | ANYOF_FLAGS(ret) = 0; | |
6022 | ||
9a86a77b | 6023 | if (UCHARAT(RExC_parse) == '^') { /* Complement of range. */ |
ffc61ed2 JH |
6024 | RExC_naughty++; |
6025 | RExC_parse++; | |
6026 | if (!SIZE_ONLY) | |
6027 | ANYOF_FLAGS(ret) |= ANYOF_INVERT; | |
6028 | } | |
a0d0e21e | 6029 | |
73060fc4 | 6030 | if (SIZE_ONLY) { |
830247a4 | 6031 | RExC_size += ANYOF_SKIP; |
73060fc4 JH |
6032 | listsv = &PL_sv_undef; /* For code scanners: listsv always non-NULL. */ |
6033 | } | |
936ed897 | 6034 | else { |
830247a4 | 6035 | RExC_emit += ANYOF_SKIP; |
936ed897 IZ |
6036 | if (FOLD) |
6037 | ANYOF_FLAGS(ret) |= ANYOF_FOLD; | |
6038 | if (LOC) | |
6039 | ANYOF_FLAGS(ret) |= ANYOF_LOCALE; | |
ffc61ed2 | 6040 | ANYOF_BITMAP_ZERO(ret); |
396482e1 | 6041 | listsv = newSVpvs("# comment\n"); |
a0d0e21e | 6042 | } |
b8c5462f | 6043 | |
9a86a77b JH |
6044 | nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0; |
6045 | ||
b938889d | 6046 | if (!SIZE_ONLY && POSIXCC(nextvalue)) |
830247a4 | 6047 | checkposixcc(pRExC_state); |
b8c5462f | 6048 | |
f064b6ad HS |
6049 | /* allow 1st char to be ] (allowing it to be - is dealt with later) */ |
6050 | if (UCHARAT(RExC_parse) == ']') | |
6051 | goto charclassloop; | |
ffc61ed2 | 6052 | |
fc8cd66c | 6053 | parseit: |
9a86a77b | 6054 | while (RExC_parse < RExC_end && UCHARAT(RExC_parse) != ']') { |
ffc61ed2 JH |
6055 | |
6056 | charclassloop: | |
6057 | ||
6058 | namedclass = OOB_NAMEDCLASS; /* initialize as illegal */ | |
6059 | ||
73b437c8 | 6060 | if (!range) |
830247a4 | 6061 | rangebegin = RExC_parse; |
ffc61ed2 | 6062 | if (UTF) { |
5e12f4fb | 6063 | value = utf8n_to_uvchr((U8*)RExC_parse, |
3568d838 | 6064 | RExC_end - RExC_parse, |
9f7f3913 | 6065 | &numlen, UTF8_ALLOW_DEFAULT); |
ffc61ed2 JH |
6066 | RExC_parse += numlen; |
6067 | } | |
6068 | else | |
6069 | value = UCHARAT(RExC_parse++); | |
7f6f358c | 6070 | |
9a86a77b JH |
6071 | nextvalue = RExC_parse < RExC_end ? UCHARAT(RExC_parse) : 0; |
6072 | if (value == '[' && POSIXCC(nextvalue)) | |
830247a4 | 6073 | namedclass = regpposixcc(pRExC_state, value); |
620e46c5 | 6074 | else if (value == '\\') { |
ffc61ed2 | 6075 | if (UTF) { |
5e12f4fb | 6076 | value = utf8n_to_uvchr((U8*)RExC_parse, |
ffc61ed2 | 6077 | RExC_end - RExC_parse, |
9f7f3913 | 6078 | &numlen, UTF8_ALLOW_DEFAULT); |
ffc61ed2 JH |
6079 | RExC_parse += numlen; |
6080 | } | |
6081 | else | |
6082 | value = UCHARAT(RExC_parse++); | |
470c3474 | 6083 | /* Some compilers cannot handle switching on 64-bit integer |
ffc61ed2 | 6084 | * values, therefore value cannot be an UV. Yes, this will |
e2962f66 JH |
6085 | * be a problem later if we want switch on Unicode. |
6086 | * A similar issue a little bit later when switching on | |
6087 | * namedclass. --jhi */ | |
ffc61ed2 | 6088 | switch ((I32)value) { |
b8c5462f JH |
6089 | case 'w': namedclass = ANYOF_ALNUM; break; |
6090 | case 'W': namedclass = ANYOF_NALNUM; break; | |
6091 | case 's': namedclass = ANYOF_SPACE; break; | |
6092 | case 'S': namedclass = ANYOF_NSPACE; break; | |
6093 | case 'd': namedclass = ANYOF_DIGIT; break; | |
6094 | case 'D': namedclass = ANYOF_NDIGIT; break; | |
fc8cd66c YO |
6095 | case 'N': /* Handle \N{NAME} in class */ |
6096 | { | |
6097 | /* We only pay attention to the first char of | |
6098 | multichar strings being returned. I kinda wonder | |
6099 | if this makes sense as it does change the behaviour | |
6100 | from earlier versions, OTOH that behaviour was broken | |
6101 | as well. */ | |
6102 | UV v; /* value is register so we cant & it /grrr */ | |
6103 | if (reg_namedseq(pRExC_state, &v)) { | |
6104 | goto parseit; | |
6105 | } | |
6106 | value= v; | |
6107 | } | |
6108 | break; | |
ffc61ed2 JH |
6109 | case 'p': |
6110 | case 'P': | |
3dab1dad YO |
6111 | { |
6112 | char *e; | |
af6f566e | 6113 | if (RExC_parse >= RExC_end) |
2a4859cd | 6114 | vFAIL2("Empty \\%c{}", (U8)value); |
ffc61ed2 | 6115 | if (*RExC_parse == '{') { |
1df70142 | 6116 | const U8 c = (U8)value; |
ffc61ed2 JH |
6117 | e = strchr(RExC_parse++, '}'); |
6118 | if (!e) | |
0da60cf5 | 6119 | vFAIL2("Missing right brace on \\%c{}", c); |
ab13f0c7 JH |
6120 | while (isSPACE(UCHARAT(RExC_parse))) |
6121 | RExC_parse++; | |
6122 | if (e == RExC_parse) | |
0da60cf5 | 6123 | vFAIL2("Empty \\%c{}", c); |
ffc61ed2 | 6124 | n = e - RExC_parse; |
ab13f0c7 JH |
6125 | while (isSPACE(UCHARAT(RExC_parse + n - 1))) |
6126 | n--; | |
ffc61ed2 JH |
6127 | } |
6128 | else { | |
6129 | e = RExC_parse; | |
6130 | n = 1; | |
6131 | } | |
6132 | if (!SIZE_ONLY) { | |
ab13f0c7 JH |
6133 | if (UCHARAT(RExC_parse) == '^') { |
6134 | RExC_parse++; | |
6135 | n--; | |
6136 | value = value == 'p' ? 'P' : 'p'; /* toggle */ | |
6137 | while (isSPACE(UCHARAT(RExC_parse))) { | |
6138 | RExC_parse++; | |
6139 | n--; | |
6140 | } | |
6141 | } | |
097eb12c AL |
6142 | Perl_sv_catpvf(aTHX_ listsv, "%cutf8::%.*s\n", |
6143 | (value=='p' ? '+' : '!'), (int)n, RExC_parse); | |
ffc61ed2 JH |
6144 | } |
6145 | RExC_parse = e + 1; | |
6146 | ANYOF_FLAGS(ret) |= ANYOF_UNICODE; | |
f81125e2 | 6147 | namedclass = ANYOF_MAX; /* no official name, but it's named */ |
3dab1dad | 6148 | } |
f81125e2 | 6149 | break; |
b8c5462f JH |
6150 | case 'n': value = '\n'; break; |
6151 | case 'r': value = '\r'; break; | |
6152 | case 't': value = '\t'; break; | |
6153 | case 'f': value = '\f'; break; | |
6154 | case 'b': value = '\b'; break; | |
c7f1f016 NIS |
6155 | case 'e': value = ASCII_TO_NATIVE('\033');break; |
6156 | case 'a': value = ASCII_TO_NATIVE('\007');break; | |
b8c5462f | 6157 | case 'x': |
ffc61ed2 | 6158 | if (*RExC_parse == '{') { |
a4c04bdc NC |
6159 | I32 flags = PERL_SCAN_ALLOW_UNDERSCORES |
6160 | | PERL_SCAN_DISALLOW_PREFIX; | |
3dab1dad | 6161 | char * const e = strchr(RExC_parse++, '}'); |
b81d288d | 6162 | if (!e) |
ffc61ed2 | 6163 | vFAIL("Missing right brace on \\x{}"); |
53305cf1 NC |
6164 | |
6165 | numlen = e - RExC_parse; | |
6166 | value = grok_hex(RExC_parse, &numlen, &flags, NULL); | |
ffc61ed2 JH |
6167 | RExC_parse = e + 1; |
6168 | } | |
6169 | else { | |
a4c04bdc | 6170 | I32 flags = PERL_SCAN_DISALLOW_PREFIX; |
53305cf1 NC |
6171 | numlen = 2; |
6172 | value = grok_hex(RExC_parse, &numlen, &flags, NULL); | |
ffc61ed2 JH |
6173 | RExC_parse += numlen; |
6174 | } | |
b8c5462f JH |
6175 | break; |
6176 | case 'c': | |
830247a4 | 6177 | value = UCHARAT(RExC_parse++); |
b8c5462f JH |
6178 | value = toCTRL(value); |
6179 | break; | |
6180 | case '0': case '1': case '2': case '3': case '4': | |
6181 | case '5': case '6': case '7': case '8': case '9': | |
53305cf1 NC |
6182 | { |
6183 | I32 flags = 0; | |
6184 | numlen = 3; | |
6185 | value = grok_oct(--RExC_parse, &numlen, &flags, NULL); | |
830247a4 | 6186 | RExC_parse += numlen; |
b8c5462f | 6187 | break; |
53305cf1 | 6188 | } |
1028017a | 6189 | default: |
041457d9 | 6190 | if (!SIZE_ONLY && isALPHA(value) && ckWARN(WARN_REGEXP)) |
ffc61ed2 JH |
6191 | vWARN2(RExC_parse, |
6192 | "Unrecognized escape \\%c in character class passed through", | |
6193 | (int)value); | |
1028017a | 6194 | break; |
b8c5462f | 6195 | } |
ffc61ed2 | 6196 | } /* end of \blah */ |
1b2d223b JH |
6197 | #ifdef EBCDIC |
6198 | else | |
6199 | literal_endpoint++; | |
6200 | #endif | |
ffc61ed2 JH |
6201 | |
6202 | if (namedclass > OOB_NAMEDCLASS) { /* this is a named class \blah */ | |
6203 | ||
6204 | if (!SIZE_ONLY && !need_class) | |
936ed897 | 6205 | ANYOF_CLASS_ZERO(ret); |
ffc61ed2 | 6206 | |
936ed897 | 6207 | need_class = 1; |
ffc61ed2 JH |
6208 | |
6209 | /* a bad range like a-\d, a-[:digit:] ? */ | |
6210 | if (range) { | |
73b437c8 | 6211 | if (!SIZE_ONLY) { |
afd78fd5 | 6212 | if (ckWARN(WARN_REGEXP)) { |
097eb12c | 6213 | const int w = |
afd78fd5 JH |
6214 | RExC_parse >= rangebegin ? |
6215 | RExC_parse - rangebegin : 0; | |
830247a4 | 6216 | vWARN4(RExC_parse, |
b45f050a | 6217 | "False [] range \"%*.*s\"", |
097eb12c | 6218 | w, w, rangebegin); |
afd78fd5 | 6219 | } |
3568d838 JH |
6220 | if (prevvalue < 256) { |
6221 | ANYOF_BITMAP_SET(ret, prevvalue); | |
ffc61ed2 JH |
6222 | ANYOF_BITMAP_SET(ret, '-'); |
6223 | } | |
6224 | else { | |
6225 | ANYOF_FLAGS(ret) |= ANYOF_UNICODE; | |
6226 | Perl_sv_catpvf(aTHX_ listsv, | |
3568d838 | 6227 | "%04"UVxf"\n%04"UVxf"\n", (UV)prevvalue, (UV) '-'); |
ffc61ed2 | 6228 | } |
b8c5462f | 6229 | } |
ffc61ed2 JH |
6230 | |
6231 | range = 0; /* this was not a true range */ | |
73b437c8 | 6232 | } |
ffc61ed2 | 6233 | |
73b437c8 | 6234 | if (!SIZE_ONLY) { |
c49a72a9 NC |
6235 | const char *what = NULL; |
6236 | char yesno = 0; | |
6237 | ||
3568d838 JH |
6238 | if (namedclass > OOB_NAMEDCLASS) |
6239 | optimize_invert = FALSE; | |
e2962f66 JH |
6240 | /* Possible truncation here but in some 64-bit environments |
6241 | * the compiler gets heartburn about switch on 64-bit values. | |
6242 | * A similar issue a little earlier when switching on value. | |
98f323fa | 6243 | * --jhi */ |
e2962f66 | 6244 | switch ((I32)namedclass) { |
73b437c8 JH |
6245 | case ANYOF_ALNUM: |
6246 | if (LOC) | |
936ed897 | 6247 | ANYOF_CLASS_SET(ret, ANYOF_ALNUM); |
73b437c8 JH |
6248 | else { |
6249 | for (value = 0; value < 256; value++) | |
6250 | if (isALNUM(value)) | |
936ed897 | 6251 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6252 | } |
c49a72a9 NC |
6253 | yesno = '+'; |
6254 | what = "Word"; | |
73b437c8 JH |
6255 | break; |
6256 | case ANYOF_NALNUM: | |
6257 | if (LOC) | |
936ed897 | 6258 | ANYOF_CLASS_SET(ret, ANYOF_NALNUM); |
73b437c8 JH |
6259 | else { |
6260 | for (value = 0; value < 256; value++) | |
6261 | if (!isALNUM(value)) | |
936ed897 | 6262 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6263 | } |
c49a72a9 NC |
6264 | yesno = '!'; |
6265 | what = "Word"; | |
73b437c8 | 6266 | break; |
ffc61ed2 | 6267 | case ANYOF_ALNUMC: |
73b437c8 | 6268 | if (LOC) |
ffc61ed2 | 6269 | ANYOF_CLASS_SET(ret, ANYOF_ALNUMC); |
73b437c8 JH |
6270 | else { |
6271 | for (value = 0; value < 256; value++) | |
ffc61ed2 | 6272 | if (isALNUMC(value)) |
936ed897 | 6273 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6274 | } |
c49a72a9 NC |
6275 | yesno = '+'; |
6276 | what = "Alnum"; | |
73b437c8 JH |
6277 | break; |
6278 | case ANYOF_NALNUMC: | |
6279 | if (LOC) | |
936ed897 | 6280 | ANYOF_CLASS_SET(ret, ANYOF_NALNUMC); |
73b437c8 JH |
6281 | else { |
6282 | for (value = 0; value < 256; value++) | |
6283 | if (!isALNUMC(value)) | |
936ed897 | 6284 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6285 | } |
c49a72a9 NC |
6286 | yesno = '!'; |
6287 | what = "Alnum"; | |
73b437c8 JH |
6288 | break; |
6289 | case ANYOF_ALPHA: | |
6290 | if (LOC) | |
936ed897 | 6291 | ANYOF_CLASS_SET(ret, ANYOF_ALPHA); |
73b437c8 JH |
6292 | else { |
6293 | for (value = 0; value < 256; value++) | |
6294 | if (isALPHA(value)) | |
936ed897 | 6295 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6296 | } |
c49a72a9 NC |
6297 | yesno = '+'; |
6298 | what = "Alpha"; | |
73b437c8 JH |
6299 | break; |
6300 | case ANYOF_NALPHA: | |
6301 | if (LOC) | |
936ed897 | 6302 | ANYOF_CLASS_SET(ret, ANYOF_NALPHA); |
73b437c8 JH |
6303 | else { |
6304 | for (value = 0; value < 256; value++) | |
6305 | if (!isALPHA(value)) | |
936ed897 | 6306 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6307 | } |
c49a72a9 NC |
6308 | yesno = '!'; |
6309 | what = "Alpha"; | |
73b437c8 JH |
6310 | break; |
6311 | case ANYOF_ASCII: | |
6312 | if (LOC) | |
936ed897 | 6313 | ANYOF_CLASS_SET(ret, ANYOF_ASCII); |
73b437c8 | 6314 | else { |
c7f1f016 | 6315 | #ifndef EBCDIC |
1ba5c669 JH |
6316 | for (value = 0; value < 128; value++) |
6317 | ANYOF_BITMAP_SET(ret, value); | |
6318 | #else /* EBCDIC */ | |
ffbc6a93 | 6319 | for (value = 0; value < 256; value++) { |
3a3c4447 JH |
6320 | if (isASCII(value)) |
6321 | ANYOF_BITMAP_SET(ret, value); | |
ffbc6a93 | 6322 | } |
1ba5c669 | 6323 | #endif /* EBCDIC */ |
73b437c8 | 6324 | } |
c49a72a9 NC |
6325 | yesno = '+'; |
6326 | what = "ASCII"; | |
73b437c8 JH |
6327 | break; |
6328 | case ANYOF_NASCII: | |
6329 | if (LOC) | |
936ed897 | 6330 | ANYOF_CLASS_SET(ret, ANYOF_NASCII); |
73b437c8 | 6331 | else { |
c7f1f016 | 6332 | #ifndef EBCDIC |
1ba5c669 JH |
6333 | for (value = 128; value < 256; value++) |
6334 | ANYOF_BITMAP_SET(ret, value); | |
6335 | #else /* EBCDIC */ | |
ffbc6a93 | 6336 | for (value = 0; value < 256; value++) { |
3a3c4447 JH |
6337 | if (!isASCII(value)) |
6338 | ANYOF_BITMAP_SET(ret, value); | |
ffbc6a93 | 6339 | } |
1ba5c669 | 6340 | #endif /* EBCDIC */ |
73b437c8 | 6341 | } |
c49a72a9 NC |
6342 | yesno = '!'; |
6343 | what = "ASCII"; | |
73b437c8 | 6344 | break; |
aaa51d5e JF |
6345 | case ANYOF_BLANK: |
6346 | if (LOC) | |
6347 | ANYOF_CLASS_SET(ret, ANYOF_BLANK); | |
6348 | else { | |
6349 | for (value = 0; value < 256; value++) | |
6350 | if (isBLANK(value)) | |
6351 | ANYOF_BITMAP_SET(ret, value); | |
6352 | } | |
c49a72a9 NC |
6353 | yesno = '+'; |
6354 | what = "Blank"; | |
aaa51d5e JF |
6355 | break; |
6356 | case ANYOF_NBLANK: | |
6357 | if (LOC) | |
6358 | ANYOF_CLASS_SET(ret, ANYOF_NBLANK); | |
6359 | else { | |
6360 | for (value = 0; value < 256; value++) | |
6361 | if (!isBLANK(value)) | |
6362 | ANYOF_BITMAP_SET(ret, value); | |
6363 | } | |
c49a72a9 NC |
6364 | yesno = '!'; |
6365 | what = "Blank"; | |
aaa51d5e | 6366 | break; |
73b437c8 JH |
6367 | case ANYOF_CNTRL: |
6368 | if (LOC) | |
936ed897 | 6369 | ANYOF_CLASS_SET(ret, ANYOF_CNTRL); |
73b437c8 JH |
6370 | else { |
6371 | for (value = 0; value < 256; value++) | |
6372 | if (isCNTRL(value)) | |
936ed897 | 6373 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6374 | } |
c49a72a9 NC |
6375 | yesno = '+'; |
6376 | what = "Cntrl"; | |
73b437c8 JH |
6377 | break; |
6378 | case ANYOF_NCNTRL: | |
6379 | if (LOC) | |
936ed897 | 6380 | ANYOF_CLASS_SET(ret, ANYOF_NCNTRL); |
73b437c8 JH |
6381 | else { |
6382 | for (value = 0; value < 256; value++) | |
6383 | if (!isCNTRL(value)) | |
936ed897 | 6384 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6385 | } |
c49a72a9 NC |
6386 | yesno = '!'; |
6387 | what = "Cntrl"; | |
ffc61ed2 JH |
6388 | break; |
6389 | case ANYOF_DIGIT: | |
6390 | if (LOC) | |
6391 | ANYOF_CLASS_SET(ret, ANYOF_DIGIT); | |
6392 | else { | |
6393 | /* consecutive digits assumed */ | |
6394 | for (value = '0'; value <= '9'; value++) | |
6395 | ANYOF_BITMAP_SET(ret, value); | |
6396 | } | |
c49a72a9 NC |
6397 | yesno = '+'; |
6398 | what = "Digit"; | |
ffc61ed2 JH |
6399 | break; |
6400 | case ANYOF_NDIGIT: | |
6401 | if (LOC) | |
6402 | ANYOF_CLASS_SET(ret, ANYOF_NDIGIT); | |
6403 | else { | |
6404 | /* consecutive digits assumed */ | |
6405 | for (value = 0; value < '0'; value++) | |
6406 | ANYOF_BITMAP_SET(ret, value); | |
6407 | for (value = '9' + 1; value < 256; value++) | |
6408 | ANYOF_BITMAP_SET(ret, value); | |
6409 | } | |
c49a72a9 NC |
6410 | yesno = '!'; |
6411 | what = "Digit"; | |
73b437c8 JH |
6412 | break; |
6413 | case ANYOF_GRAPH: | |
6414 | if (LOC) | |
936ed897 | 6415 | ANYOF_CLASS_SET(ret, ANYOF_GRAPH); |
73b437c8 JH |
6416 | else { |
6417 | for (value = 0; value < 256; value++) | |
6418 | if (isGRAPH(value)) | |
936ed897 | 6419 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6420 | } |
c49a72a9 NC |
6421 | yesno = '+'; |
6422 | what = "Graph"; | |
73b437c8 JH |
6423 | break; |
6424 | case ANYOF_NGRAPH: | |
6425 | if (LOC) | |
936ed897 | 6426 | ANYOF_CLASS_SET(ret, ANYOF_NGRAPH); |
73b437c8 JH |
6427 | else { |
6428 | for (value = 0; value < 256; value++) | |
6429 | if (!isGRAPH(value)) | |
936ed897 | 6430 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6431 | } |
c49a72a9 NC |
6432 | yesno = '!'; |
6433 | what = "Graph"; | |
73b437c8 JH |
6434 | break; |
6435 | case ANYOF_LOWER: | |
6436 | if (LOC) | |
936ed897 | 6437 | ANYOF_CLASS_SET(ret, ANYOF_LOWER); |
73b437c8 JH |
6438 | else { |
6439 | for (value = 0; value < 256; value++) | |
6440 | if (isLOWER(value)) | |
936ed897 | 6441 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6442 | } |
c49a72a9 NC |
6443 | yesno = '+'; |
6444 | what = "Lower"; | |
73b437c8 JH |
6445 | break; |
6446 | case ANYOF_NLOWER: | |
6447 | if (LOC) | |
936ed897 | 6448 | ANYOF_CLASS_SET(ret, ANYOF_NLOWER); |
73b437c8 JH |
6449 | else { |
6450 | for (value = 0; value < 256; value++) | |
6451 | if (!isLOWER(value)) | |
936ed897 | 6452 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6453 | } |
c49a72a9 NC |
6454 | yesno = '!'; |
6455 | what = "Lower"; | |
73b437c8 JH |
6456 | break; |
6457 | case ANYOF_PRINT: | |
6458 | if (LOC) | |
936ed897 | 6459 | ANYOF_CLASS_SET(ret, ANYOF_PRINT); |
73b437c8 JH |
6460 | else { |
6461 | for (value = 0; value < 256; value++) | |
6462 | if (isPRINT(value)) | |
936ed897 | 6463 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6464 | } |
c49a72a9 NC |
6465 | yesno = '+'; |
6466 | what = "Print"; | |
73b437c8 JH |
6467 | break; |
6468 | case ANYOF_NPRINT: | |
6469 | if (LOC) | |
936ed897 | 6470 | ANYOF_CLASS_SET(ret, ANYOF_NPRINT); |
73b437c8 JH |
6471 | else { |
6472 | for (value = 0; value < 256; value++) | |
6473 | if (!isPRINT(value)) | |
936ed897 | 6474 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6475 | } |
c49a72a9 NC |
6476 | yesno = '!'; |
6477 | what = "Print"; | |
73b437c8 | 6478 | break; |
aaa51d5e JF |
6479 | case ANYOF_PSXSPC: |
6480 | if (LOC) | |
6481 | ANYOF_CLASS_SET(ret, ANYOF_PSXSPC); | |
6482 | else { | |
6483 | for (value = 0; value < 256; value++) | |
6484 | if (isPSXSPC(value)) | |
6485 | ANYOF_BITMAP_SET(ret, value); | |
6486 | } | |
c49a72a9 NC |
6487 | yesno = '+'; |
6488 | what = "Space"; | |
aaa51d5e JF |
6489 | break; |
6490 | case ANYOF_NPSXSPC: | |
6491 | if (LOC) | |
6492 | ANYOF_CLASS_SET(ret, ANYOF_NPSXSPC); | |
6493 | else { | |
6494 | for (value = 0; value < 256; value++) | |
6495 | if (!isPSXSPC(value)) | |
6496 | ANYOF_BITMAP_SET(ret, value); | |
6497 | } | |
c49a72a9 NC |
6498 | yesno = '!'; |
6499 | what = "Space"; | |
aaa51d5e | 6500 | break; |
73b437c8 JH |
6501 | case ANYOF_PUNCT: |
6502 | if (LOC) | |
936ed897 | 6503 | ANYOF_CLASS_SET(ret, ANYOF_PUNCT); |
73b437c8 JH |
6504 | else { |
6505 | for (value = 0; value < 256; value++) | |
6506 | if (isPUNCT(value)) | |
936ed897 | 6507 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6508 | } |
c49a72a9 NC |
6509 | yesno = '+'; |
6510 | what = "Punct"; | |
73b437c8 JH |
6511 | break; |
6512 | case ANYOF_NPUNCT: | |
6513 | if (LOC) | |
936ed897 | 6514 | ANYOF_CLASS_SET(ret, ANYOF_NPUNCT); |
73b437c8 JH |
6515 | else { |
6516 | for (value = 0; value < 256; value++) | |
6517 | if (!isPUNCT(value)) | |
936ed897 | 6518 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6519 | } |
c49a72a9 NC |
6520 | yesno = '!'; |
6521 | what = "Punct"; | |
ffc61ed2 JH |
6522 | break; |
6523 | case ANYOF_SPACE: | |
6524 | if (LOC) | |
6525 | ANYOF_CLASS_SET(ret, ANYOF_SPACE); | |
6526 | else { | |
6527 | for (value = 0; value < 256; value++) | |
6528 | if (isSPACE(value)) | |
6529 | ANYOF_BITMAP_SET(ret, value); | |
6530 | } | |
c49a72a9 NC |
6531 | yesno = '+'; |
6532 | what = "SpacePerl"; | |
ffc61ed2 JH |
6533 | break; |
6534 | case ANYOF_NSPACE: | |
6535 | if (LOC) | |
6536 | ANYOF_CLASS_SET(ret, ANYOF_NSPACE); | |
6537 | else { | |
6538 | for (value = 0; value < 256; value++) | |
6539 | if (!isSPACE(value)) | |
6540 | ANYOF_BITMAP_SET(ret, value); | |
6541 | } | |
c49a72a9 NC |
6542 | yesno = '!'; |
6543 | what = "SpacePerl"; | |
73b437c8 JH |
6544 | break; |
6545 | case ANYOF_UPPER: | |
6546 | if (LOC) | |
936ed897 | 6547 | ANYOF_CLASS_SET(ret, ANYOF_UPPER); |
73b437c8 JH |
6548 | else { |
6549 | for (value = 0; value < 256; value++) | |
6550 | if (isUPPER(value)) | |
936ed897 | 6551 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6552 | } |
c49a72a9 NC |
6553 | yesno = '+'; |
6554 | what = "Upper"; | |
73b437c8 JH |
6555 | break; |
6556 | case ANYOF_NUPPER: | |
6557 | if (LOC) | |
936ed897 | 6558 | ANYOF_CLASS_SET(ret, ANYOF_NUPPER); |
73b437c8 JH |
6559 | else { |
6560 | for (value = 0; value < 256; value++) | |
6561 | if (!isUPPER(value)) | |
936ed897 | 6562 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6563 | } |
c49a72a9 NC |
6564 | yesno = '!'; |
6565 | what = "Upper"; | |
73b437c8 JH |
6566 | break; |
6567 | case ANYOF_XDIGIT: | |
6568 | if (LOC) | |
936ed897 | 6569 | ANYOF_CLASS_SET(ret, ANYOF_XDIGIT); |
73b437c8 JH |
6570 | else { |
6571 | for (value = 0; value < 256; value++) | |
6572 | if (isXDIGIT(value)) | |
936ed897 | 6573 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6574 | } |
c49a72a9 NC |
6575 | yesno = '+'; |
6576 | what = "XDigit"; | |
73b437c8 JH |
6577 | break; |
6578 | case ANYOF_NXDIGIT: | |
6579 | if (LOC) | |
936ed897 | 6580 | ANYOF_CLASS_SET(ret, ANYOF_NXDIGIT); |
73b437c8 JH |
6581 | else { |
6582 | for (value = 0; value < 256; value++) | |
6583 | if (!isXDIGIT(value)) | |
936ed897 | 6584 | ANYOF_BITMAP_SET(ret, value); |
73b437c8 | 6585 | } |
c49a72a9 NC |
6586 | yesno = '!'; |
6587 | what = "XDigit"; | |
73b437c8 | 6588 | break; |
f81125e2 JP |
6589 | case ANYOF_MAX: |
6590 | /* this is to handle \p and \P */ | |
6591 | break; | |
73b437c8 | 6592 | default: |
b45f050a | 6593 | vFAIL("Invalid [::] class"); |
73b437c8 | 6594 | break; |
b8c5462f | 6595 | } |
c49a72a9 NC |
6596 | if (what) { |
6597 | /* Strings such as "+utf8::isWord\n" */ | |
6598 | Perl_sv_catpvf(aTHX_ listsv, "%cutf8::Is%s\n", yesno, what); | |
6599 | } | |
b8c5462f | 6600 | if (LOC) |
936ed897 | 6601 | ANYOF_FLAGS(ret) |= ANYOF_CLASS; |
73b437c8 | 6602 | continue; |
a0d0e21e | 6603 | } |
ffc61ed2 JH |
6604 | } /* end of namedclass \blah */ |
6605 | ||
a0d0e21e | 6606 | if (range) { |
eb160463 | 6607 | if (prevvalue > (IV)value) /* b-a */ { |
d4c19fe8 AL |
6608 | const int w = RExC_parse - rangebegin; |
6609 | Simple_vFAIL4("Invalid [] range \"%*.*s\"", w, w, rangebegin); | |
3568d838 | 6610 | range = 0; /* not a valid range */ |
73b437c8 | 6611 | } |
a0d0e21e LW |
6612 | } |
6613 | else { | |
3568d838 | 6614 | prevvalue = value; /* save the beginning of the range */ |
830247a4 IZ |
6615 | if (*RExC_parse == '-' && RExC_parse+1 < RExC_end && |
6616 | RExC_parse[1] != ']') { | |
6617 | RExC_parse++; | |
ffc61ed2 JH |
6618 | |
6619 | /* a bad range like \w-, [:word:]- ? */ | |
6620 | if (namedclass > OOB_NAMEDCLASS) { | |
afd78fd5 | 6621 | if (ckWARN(WARN_REGEXP)) { |
d4c19fe8 | 6622 | const int w = |
afd78fd5 JH |
6623 | RExC_parse >= rangebegin ? |
6624 | RExC_parse - rangebegin : 0; | |
830247a4 | 6625 | vWARN4(RExC_parse, |
b45f050a | 6626 | "False [] range \"%*.*s\"", |
097eb12c | 6627 | w, w, rangebegin); |
afd78fd5 | 6628 | } |
73b437c8 | 6629 | if (!SIZE_ONLY) |
936ed897 | 6630 | ANYOF_BITMAP_SET(ret, '-'); |
73b437c8 | 6631 | } else |
ffc61ed2 JH |
6632 | range = 1; /* yeah, it's a range! */ |
6633 | continue; /* but do it the next time */ | |
a0d0e21e | 6634 | } |
a687059c | 6635 | } |
ffc61ed2 | 6636 | |
93733859 | 6637 | /* now is the next time */ |
07be1b83 | 6638 | /*stored += (value - prevvalue + 1);*/ |
ae5c130c | 6639 | if (!SIZE_ONLY) { |
3568d838 | 6640 | if (prevvalue < 256) { |
1df70142 | 6641 | const IV ceilvalue = value < 256 ? value : 255; |
3dab1dad | 6642 | IV i; |
3568d838 | 6643 | #ifdef EBCDIC |
1b2d223b JH |
6644 | /* In EBCDIC [\x89-\x91] should include |
6645 | * the \x8e but [i-j] should not. */ | |
6646 | if (literal_endpoint == 2 && | |
6647 | ((isLOWER(prevvalue) && isLOWER(ceilvalue)) || | |
6648 | (isUPPER(prevvalue) && isUPPER(ceilvalue)))) | |
ffc61ed2 | 6649 | { |
3568d838 JH |
6650 | if (isLOWER(prevvalue)) { |
6651 | for (i = prevvalue; i <= ceilvalue; i++) | |
ffc61ed2 JH |
6652 | if (isLOWER(i)) |
6653 | ANYOF_BITMAP_SET(ret, i); | |
6654 | } else { | |
3568d838 | 6655 | for (i = prevvalue; i <= ceilvalue; i++) |
ffc61ed2 JH |
6656 | if (isUPPER(i)) |
6657 | ANYOF_BITMAP_SET(ret, i); | |
6658 | } | |
8ada0baa | 6659 | } |
ffc61ed2 | 6660 | else |
8ada0baa | 6661 | #endif |
07be1b83 YO |
6662 | for (i = prevvalue; i <= ceilvalue; i++) { |
6663 | if (!ANYOF_BITMAP_TEST(ret,i)) { | |
6664 | stored++; | |
6665 | ANYOF_BITMAP_SET(ret, i); | |
6666 | } | |
6667 | } | |
3568d838 | 6668 | } |
a5961de5 | 6669 | if (value > 255 || UTF) { |
1df70142 AL |
6670 | const UV prevnatvalue = NATIVE_TO_UNI(prevvalue); |
6671 | const UV natvalue = NATIVE_TO_UNI(value); | |
07be1b83 | 6672 | stored+=2; /* can't optimize this class */ |
ffc61ed2 | 6673 | ANYOF_FLAGS(ret) |= ANYOF_UNICODE; |
b08decb7 | 6674 | if (prevnatvalue < natvalue) { /* what about > ? */ |
ffc61ed2 | 6675 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\t%04"UVxf"\n", |
b08decb7 JH |
6676 | prevnatvalue, natvalue); |
6677 | } | |
6678 | else if (prevnatvalue == natvalue) { | |
6679 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", natvalue); | |
09091399 | 6680 | if (FOLD) { |
89ebb4a3 | 6681 | U8 foldbuf[UTF8_MAXBYTES_CASE+1]; |
254ba52a | 6682 | STRLEN foldlen; |
1df70142 | 6683 | const UV f = to_uni_fold(natvalue, foldbuf, &foldlen); |
254ba52a | 6684 | |
e294cc5d JH |
6685 | #ifdef EBCDIC /* RD t/uni/fold ff and 6b */ |
6686 | if (RExC_precomp[0] == ':' && | |
6687 | RExC_precomp[1] == '[' && | |
6688 | (f == 0xDF || f == 0x92)) { | |
6689 | f = NATIVE_TO_UNI(f); | |
6690 | } | |
6691 | #endif | |
c840d2a2 JH |
6692 | /* If folding and foldable and a single |
6693 | * character, insert also the folded version | |
6694 | * to the charclass. */ | |
9e55ce06 | 6695 | if (f != value) { |
e294cc5d JH |
6696 | #ifdef EBCDIC /* RD tunifold ligatures s,t fb05, fb06 */ |
6697 | if ((RExC_precomp[0] == ':' && | |
6698 | RExC_precomp[1] == '[' && | |
6699 | (f == 0xA2 && | |
6700 | (value == 0xFB05 || value == 0xFB06))) ? | |
6701 | foldlen == ((STRLEN)UNISKIP(f) - 1) : | |
6702 | foldlen == (STRLEN)UNISKIP(f) ) | |
6703 | #else | |
eb160463 | 6704 | if (foldlen == (STRLEN)UNISKIP(f)) |
e294cc5d | 6705 | #endif |
9e55ce06 JH |
6706 | Perl_sv_catpvf(aTHX_ listsv, |
6707 | "%04"UVxf"\n", f); | |
6708 | else { | |
6709 | /* Any multicharacter foldings | |
6710 | * require the following transform: | |
6711 | * [ABCDEF] -> (?:[ABCabcDEFd]|pq|rst) | |
6712 | * where E folds into "pq" and F folds | |
6713 | * into "rst", all other characters | |
6714 | * fold to single characters. We save | |
6715 | * away these multicharacter foldings, | |
6716 | * to be later saved as part of the | |
6717 | * additional "s" data. */ | |
6718 | SV *sv; | |
6719 | ||
6720 | if (!unicode_alternate) | |
6721 | unicode_alternate = newAV(); | |
6722 | sv = newSVpvn((char*)foldbuf, foldlen); | |
6723 | SvUTF8_on(sv); | |
6724 | av_push(unicode_alternate, sv); | |
6725 | } | |
6726 | } | |
254ba52a | 6727 | |
60a8b682 JH |
6728 | /* If folding and the value is one of the Greek |
6729 | * sigmas insert a few more sigmas to make the | |
6730 | * folding rules of the sigmas to work right. | |
6731 | * Note that not all the possible combinations | |
6732 | * are handled here: some of them are handled | |
9e55ce06 JH |
6733 | * by the standard folding rules, and some of |
6734 | * them (literal or EXACTF cases) are handled | |
6735 | * during runtime in regexec.c:S_find_byclass(). */ | |
09091399 JH |
6736 | if (value == UNICODE_GREEK_SMALL_LETTER_FINAL_SIGMA) { |
6737 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", | |
eb050b28 | 6738 | (UV)UNICODE_GREEK_CAPITAL_LETTER_SIGMA); |
09091399 | 6739 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", |
eb050b28 | 6740 | (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA); |
09091399 JH |
6741 | } |
6742 | else if (value == UNICODE_GREEK_CAPITAL_LETTER_SIGMA) | |
6743 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", | |
eb050b28 | 6744 | (UV)UNICODE_GREEK_SMALL_LETTER_SIGMA); |
09091399 JH |
6745 | } |
6746 | } | |
ffc61ed2 | 6747 | } |
1b2d223b JH |
6748 | #ifdef EBCDIC |
6749 | literal_endpoint = 0; | |
6750 | #endif | |
8ada0baa | 6751 | } |
ffc61ed2 JH |
6752 | |
6753 | range = 0; /* this range (if it was one) is done now */ | |
a0d0e21e | 6754 | } |
ffc61ed2 | 6755 | |
936ed897 | 6756 | if (need_class) { |
4f66b38d | 6757 | ANYOF_FLAGS(ret) |= ANYOF_LARGE; |
936ed897 | 6758 | if (SIZE_ONLY) |
830247a4 | 6759 | RExC_size += ANYOF_CLASS_ADD_SKIP; |
936ed897 | 6760 | else |
830247a4 | 6761 | RExC_emit += ANYOF_CLASS_ADD_SKIP; |
936ed897 | 6762 | } |
ffc61ed2 | 6763 | |
7f6f358c YO |
6764 | |
6765 | if (SIZE_ONLY) | |
6766 | return ret; | |
6767 | /****** !SIZE_ONLY AFTER HERE *********/ | |
6768 | ||
6769 | if( stored == 1 && value < 256 | |
6770 | && !( ANYOF_FLAGS(ret) & ( ANYOF_FLAGS_ALL ^ ANYOF_FOLD ) ) | |
6771 | ) { | |
6772 | /* optimize single char class to an EXACT node | |
6773 | but *only* when its not a UTF/high char */ | |
07be1b83 YO |
6774 | const char * cur_parse= RExC_parse; |
6775 | RExC_emit = (regnode *)orig_emit; | |
6776 | RExC_parse = (char *)orig_parse; | |
7f6f358c YO |
6777 | ret = reg_node(pRExC_state, |
6778 | (U8)((ANYOF_FLAGS(ret) & ANYOF_FOLD) ? EXACTF : EXACT)); | |
07be1b83 | 6779 | RExC_parse = (char *)cur_parse; |
7f6f358c YO |
6780 | *STRING(ret)= (char)value; |
6781 | STR_LEN(ret)= 1; | |
6782 | RExC_emit += STR_SZ(1); | |
6783 | return ret; | |
6784 | } | |
ae5c130c | 6785 | /* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */ |
7f6f358c | 6786 | if ( /* If the only flag is folding (plus possibly inversion). */ |
516a5887 JH |
6787 | ((ANYOF_FLAGS(ret) & (ANYOF_FLAGS_ALL ^ ANYOF_INVERT)) == ANYOF_FOLD) |
6788 | ) { | |
a0ed51b3 | 6789 | for (value = 0; value < 256; ++value) { |
936ed897 | 6790 | if (ANYOF_BITMAP_TEST(ret, value)) { |
eb160463 | 6791 | UV fold = PL_fold[value]; |
ffc61ed2 JH |
6792 | |
6793 | if (fold != value) | |
6794 | ANYOF_BITMAP_SET(ret, fold); | |
ae5c130c GS |
6795 | } |
6796 | } | |
936ed897 | 6797 | ANYOF_FLAGS(ret) &= ~ANYOF_FOLD; |
ae5c130c | 6798 | } |
ffc61ed2 | 6799 | |
ae5c130c | 6800 | /* optimize inverted simple patterns (e.g. [^a-z]) */ |
7f6f358c | 6801 | if (optimize_invert && |
ffc61ed2 JH |
6802 | /* If the only flag is inversion. */ |
6803 | (ANYOF_FLAGS(ret) & ANYOF_FLAGS_ALL) == ANYOF_INVERT) { | |
b8c5462f | 6804 | for (value = 0; value < ANYOF_BITMAP_SIZE; ++value) |
936ed897 | 6805 | ANYOF_BITMAP(ret)[value] ^= ANYOF_FLAGS_ALL; |
1aa99e6b | 6806 | ANYOF_FLAGS(ret) = ANYOF_UNICODE_ALL; |
ae5c130c | 6807 | } |
7f6f358c | 6808 | { |
097eb12c | 6809 | AV * const av = newAV(); |
ffc61ed2 | 6810 | SV *rv; |
9e55ce06 | 6811 | /* The 0th element stores the character class description |
6a0407ee | 6812 | * in its textual form: used later (regexec.c:Perl_regclass_swash()) |
9e55ce06 JH |
6813 | * to initialize the appropriate swash (which gets stored in |
6814 | * the 1st element), and also useful for dumping the regnode. | |
6815 | * The 2nd element stores the multicharacter foldings, | |
6a0407ee | 6816 | * used later (regexec.c:S_reginclass()). */ |
ffc61ed2 JH |
6817 | av_store(av, 0, listsv); |
6818 | av_store(av, 1, NULL); | |
9e55ce06 | 6819 | av_store(av, 2, (SV*)unicode_alternate); |
ffc61ed2 | 6820 | rv = newRV_noinc((SV*)av); |
19860706 | 6821 | n = add_data(pRExC_state, 1, "s"); |
830247a4 | 6822 | RExC_rx->data->data[n] = (void*)rv; |
ffc61ed2 | 6823 | ARG_SET(ret, n); |
a0ed51b3 | 6824 | } |
a0ed51b3 LW |
6825 | return ret; |
6826 | } | |
6827 | ||
76e3520e | 6828 | STATIC char* |
830247a4 | 6829 | S_nextchar(pTHX_ RExC_state_t *pRExC_state) |
a0d0e21e | 6830 | { |
097eb12c | 6831 | char* const retval = RExC_parse++; |
a0d0e21e | 6832 | |
4633a7c4 | 6833 | for (;;) { |
830247a4 IZ |
6834 | if (*RExC_parse == '(' && RExC_parse[1] == '?' && |
6835 | RExC_parse[2] == '#') { | |
e994fd66 AE |
6836 | while (*RExC_parse != ')') { |
6837 | if (RExC_parse == RExC_end) | |
6838 | FAIL("Sequence (?#... not terminated"); | |
830247a4 | 6839 | RExC_parse++; |
e994fd66 | 6840 | } |
830247a4 | 6841 | RExC_parse++; |
4633a7c4 LW |
6842 | continue; |
6843 | } | |
e2509266 | 6844 | if (RExC_flags & PMf_EXTENDED) { |
830247a4 IZ |
6845 | if (isSPACE(*RExC_parse)) { |
6846 | RExC_parse++; | |
748a9306 LW |
6847 | continue; |
6848 | } | |
830247a4 | 6849 | else if (*RExC_parse == '#') { |
e994fd66 AE |
6850 | while (RExC_parse < RExC_end) |
6851 | if (*RExC_parse++ == '\n') break; | |
748a9306 LW |
6852 | continue; |
6853 | } | |
748a9306 | 6854 | } |
4633a7c4 | 6855 | return retval; |
a0d0e21e | 6856 | } |
a687059c LW |
6857 | } |
6858 | ||
6859 | /* | |
c277df42 | 6860 | - reg_node - emit a node |
a0d0e21e | 6861 | */ |
76e3520e | 6862 | STATIC regnode * /* Location. */ |
830247a4 | 6863 | S_reg_node(pTHX_ RExC_state_t *pRExC_state, U8 op) |
a687059c | 6864 | { |
97aff369 | 6865 | dVAR; |
c277df42 | 6866 | register regnode *ptr; |
504618e9 | 6867 | regnode * const ret = RExC_emit; |
07be1b83 | 6868 | GET_RE_DEBUG_FLAGS_DECL; |
a687059c | 6869 | |
c277df42 | 6870 | if (SIZE_ONLY) { |
830247a4 IZ |
6871 | SIZE_ALIGN(RExC_size); |
6872 | RExC_size += 1; | |
a0d0e21e LW |
6873 | return(ret); |
6874 | } | |
c277df42 | 6875 | NODE_ALIGN_FILL(ret); |
a0d0e21e | 6876 | ptr = ret; |
c277df42 | 6877 | FILL_ADVANCE_NODE(ptr, op); |
fac92740 | 6878 | if (RExC_offsets) { /* MJD */ |
07be1b83 | 6879 | MJD_OFFSET_DEBUG(("%s:%d: (op %s) %s %"UVuf" (len %"UVuf") (max %"UVuf").\n", |
fac92740 MJD |
6880 | "reg_node", __LINE__, |
6881 | reg_name[op], | |
07be1b83 YO |
6882 | (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] |
6883 | ? "Overwriting end of array!\n" : "OK", | |
6884 | (UV)(RExC_emit - RExC_emit_start), | |
6885 | (UV)(RExC_parse - RExC_start), | |
6886 | (UV)RExC_offsets[0])); | |
ccb2c380 | 6887 | Set_Node_Offset(RExC_emit, RExC_parse + (op == END)); |
fac92740 | 6888 | } |
07be1b83 | 6889 | |
830247a4 | 6890 | RExC_emit = ptr; |
a687059c | 6891 | |
a0d0e21e | 6892 | return(ret); |
a687059c LW |
6893 | } |
6894 | ||
6895 | /* | |
a0d0e21e LW |
6896 | - reganode - emit a node with an argument |
6897 | */ | |
76e3520e | 6898 | STATIC regnode * /* Location. */ |
830247a4 | 6899 | S_reganode(pTHX_ RExC_state_t *pRExC_state, U8 op, U32 arg) |
fe14fcc3 | 6900 | { |
97aff369 | 6901 | dVAR; |
c277df42 | 6902 | register regnode *ptr; |
504618e9 | 6903 | regnode * const ret = RExC_emit; |
07be1b83 | 6904 | GET_RE_DEBUG_FLAGS_DECL; |
fe14fcc3 | 6905 | |
c277df42 | 6906 | if (SIZE_ONLY) { |
830247a4 IZ |
6907 | SIZE_ALIGN(RExC_size); |
6908 | RExC_size += 2; | |
a0d0e21e LW |
6909 | return(ret); |
6910 | } | |
fe14fcc3 | 6911 | |
c277df42 | 6912 | NODE_ALIGN_FILL(ret); |
a0d0e21e | 6913 | ptr = ret; |
c277df42 | 6914 | FILL_ADVANCE_NODE_ARG(ptr, op, arg); |
fac92740 | 6915 | if (RExC_offsets) { /* MJD */ |
07be1b83 | 6916 | MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n", |
fac92740 | 6917 | "reganode", |
ccb2c380 MP |
6918 | __LINE__, |
6919 | reg_name[op], | |
07be1b83 | 6920 | (UV)(RExC_emit - RExC_emit_start) > RExC_offsets[0] ? |
fac92740 | 6921 | "Overwriting end of array!\n" : "OK", |
07be1b83 YO |
6922 | (UV)(RExC_emit - RExC_emit_start), |
6923 | (UV)(RExC_parse - RExC_start), | |
6924 | (UV)RExC_offsets[0])); | |
ccb2c380 | 6925 | Set_Cur_Node_Offset; |
fac92740 MJD |
6926 | } |
6927 | ||
830247a4 | 6928 | RExC_emit = ptr; |
fe14fcc3 | 6929 | |
a0d0e21e | 6930 | return(ret); |
fe14fcc3 LW |
6931 | } |
6932 | ||
6933 | /* | |
cd439c50 | 6934 | - reguni - emit (if appropriate) a Unicode character |
a0ed51b3 | 6935 | */ |
71207a34 AL |
6936 | STATIC STRLEN |
6937 | S_reguni(pTHX_ const RExC_state_t *pRExC_state, UV uv, char* s) | |
a0ed51b3 | 6938 | { |
97aff369 | 6939 | dVAR; |
71207a34 | 6940 | return SIZE_ONLY ? UNISKIP(uv) : (uvchr_to_utf8((U8*)s, uv) - (U8*)s); |
a0ed51b3 LW |
6941 | } |
6942 | ||
6943 | /* | |
a0d0e21e LW |
6944 | - reginsert - insert an operator in front of already-emitted operand |
6945 | * | |
6946 | * Means relocating the operand. | |
6947 | */ | |
76e3520e | 6948 | STATIC void |
830247a4 | 6949 | S_reginsert(pTHX_ RExC_state_t *pRExC_state, U8 op, regnode *opnd) |
a687059c | 6950 | { |
97aff369 | 6951 | dVAR; |
c277df42 IZ |
6952 | register regnode *src; |
6953 | register regnode *dst; | |
6954 | register regnode *place; | |
504618e9 | 6955 | const int offset = regarglen[(U8)op]; |
07be1b83 | 6956 | GET_RE_DEBUG_FLAGS_DECL; |
22c35a8c | 6957 | /* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */ |
c277df42 IZ |
6958 | |
6959 | if (SIZE_ONLY) { | |
830247a4 | 6960 | RExC_size += NODE_STEP_REGNODE + offset; |
a0d0e21e LW |
6961 | return; |
6962 | } | |
a687059c | 6963 | |
830247a4 IZ |
6964 | src = RExC_emit; |
6965 | RExC_emit += NODE_STEP_REGNODE + offset; | |
6966 | dst = RExC_emit; | |
fac92740 | 6967 | while (src > opnd) { |
c277df42 | 6968 | StructCopy(--src, --dst, regnode); |
fac92740 | 6969 | if (RExC_offsets) { /* MJD 20010112 */ |
07be1b83 | 6970 | MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s copy %"UVuf" -> %"UVuf" (max %"UVuf").\n", |
fac92740 | 6971 | "reg_insert", |
ccb2c380 MP |
6972 | __LINE__, |
6973 | reg_name[op], | |
07be1b83 YO |
6974 | (UV)(dst - RExC_emit_start) > RExC_offsets[0] |
6975 | ? "Overwriting end of array!\n" : "OK", | |
6976 | (UV)(src - RExC_emit_start), | |
6977 | (UV)(dst - RExC_emit_start), | |
6978 | (UV)RExC_offsets[0])); | |
ccb2c380 MP |
6979 | Set_Node_Offset_To_R(dst-RExC_emit_start, Node_Offset(src)); |
6980 | Set_Node_Length_To_R(dst-RExC_emit_start, Node_Length(src)); | |
fac92740 MJD |
6981 | } |
6982 | } | |
6983 | ||
a0d0e21e LW |
6984 | |
6985 | place = opnd; /* Op node, where operand used to be. */ | |
fac92740 | 6986 | if (RExC_offsets) { /* MJD */ |
07be1b83 | 6987 | MJD_OFFSET_DEBUG(("%s(%d): (op %s) %s %"UVuf" <- %"UVuf" (max %"UVuf").\n", |
fac92740 | 6988 | "reginsert", |
ccb2c380 MP |
6989 | __LINE__, |
6990 | reg_name[op], | |
07be1b83 | 6991 | (UV)(place - RExC_emit_start) > RExC_offsets[0] |
fac92740 | 6992 | ? "Overwriting end of array!\n" : "OK", |
07be1b83 YO |
6993 | (UV)(place - RExC_emit_start), |
6994 | (UV)(RExC_parse - RExC_start), | |
786e8c11 | 6995 | (UV)RExC_offsets[0])); |
ccb2c380 | 6996 | Set_Node_Offset(place, RExC_parse); |
45948336 | 6997 | Set_Node_Length(place, 1); |
fac92740 | 6998 | } |
c277df42 IZ |
6999 | src = NEXTOPER(place); |
7000 | FILL_ADVANCE_NODE(place, op); | |
7001 | Zero(src, offset, regnode); | |
a687059c LW |
7002 | } |
7003 | ||
7004 | /* | |
c277df42 | 7005 | - regtail - set the next-pointer at the end of a node chain of p to val. |
3dab1dad | 7006 | - SEE ALSO: regtail_study |
a0d0e21e | 7007 | */ |
097eb12c | 7008 | /* TODO: All three parms should be const */ |
76e3520e | 7009 | STATIC void |
3dab1dad | 7010 | S_regtail(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth) |
a687059c | 7011 | { |
97aff369 | 7012 | dVAR; |
c277df42 | 7013 | register regnode *scan; |
72f13be8 | 7014 | GET_RE_DEBUG_FLAGS_DECL; |
f9049ba1 SP |
7015 | #ifndef DEBUGGING |
7016 | PERL_UNUSED_ARG(depth); | |
7017 | #endif | |
a0d0e21e | 7018 | |
c277df42 | 7019 | if (SIZE_ONLY) |
a0d0e21e LW |
7020 | return; |
7021 | ||
7022 | /* Find last node. */ | |
7023 | scan = p; | |
7024 | for (;;) { | |
504618e9 | 7025 | regnode * const temp = regnext(scan); |
3dab1dad YO |
7026 | DEBUG_PARSE_r({ |
7027 | SV * const mysv=sv_newmortal(); | |
7028 | DEBUG_PARSE_MSG((scan==p ? "tail" : "")); | |
7029 | regprop(RExC_rx, mysv, scan); | |
7030 | PerlIO_printf(Perl_debug_log, "~ %s (%d)\n", | |
7031 | SvPV_nolen_const(mysv), REG_NODE_NUM(scan)); | |
7032 | }); | |
7033 | if (temp == NULL) | |
7034 | break; | |
7035 | scan = temp; | |
7036 | } | |
7037 | ||
7038 | if (reg_off_by_arg[OP(scan)]) { | |
7039 | ARG_SET(scan, val - scan); | |
7040 | } | |
7041 | else { | |
7042 | NEXT_OFF(scan) = val - scan; | |
7043 | } | |
7044 | } | |
7045 | ||
07be1b83 | 7046 | #ifdef DEBUGGING |
3dab1dad YO |
7047 | /* |
7048 | - regtail_study - set the next-pointer at the end of a node chain of p to val. | |
7049 | - Look for optimizable sequences at the same time. | |
7050 | - currently only looks for EXACT chains. | |
07be1b83 YO |
7051 | |
7052 | This is expermental code. The idea is to use this routine to perform | |
7053 | in place optimizations on branches and groups as they are constructed, | |
7054 | with the long term intention of removing optimization from study_chunk so | |
7055 | that it is purely analytical. | |
7056 | ||
7057 | Currently only used when in DEBUG mode. The macro REGTAIL_STUDY() is used | |
7058 | to control which is which. | |
7059 | ||
3dab1dad YO |
7060 | */ |
7061 | /* TODO: All four parms should be const */ | |
07be1b83 | 7062 | |
3dab1dad YO |
7063 | STATIC U8 |
7064 | S_regtail_study(pTHX_ RExC_state_t *pRExC_state, regnode *p, const regnode *val,U32 depth) | |
7065 | { | |
7066 | dVAR; | |
7067 | register regnode *scan; | |
07be1b83 YO |
7068 | U8 exact = PSEUDO; |
7069 | #ifdef EXPERIMENTAL_INPLACESCAN | |
7070 | I32 min = 0; | |
7071 | #endif | |
7072 | ||
3dab1dad YO |
7073 | GET_RE_DEBUG_FLAGS_DECL; |
7074 | ||
07be1b83 | 7075 | |
3dab1dad YO |
7076 | if (SIZE_ONLY) |
7077 | return exact; | |
7078 | ||
7079 | /* Find last node. */ | |
7080 | ||
7081 | scan = p; | |
7082 | for (;;) { | |
7083 | regnode * const temp = regnext(scan); | |
07be1b83 YO |
7084 | #ifdef EXPERIMENTAL_INPLACESCAN |
7085 | if (PL_regkind[OP(scan)] == EXACT) | |
7086 | if (join_exact(pRExC_state,scan,&min,1,val,depth+1)) | |
7087 | return EXACT; | |
7088 | #endif | |
3dab1dad YO |
7089 | if ( exact ) { |
7090 | switch (OP(scan)) { | |
7091 | case EXACT: | |
7092 | case EXACTF: | |
7093 | case EXACTFL: | |
7094 | if( exact == PSEUDO ) | |
7095 | exact= OP(scan); | |
07be1b83 YO |
7096 | else if ( exact != OP(scan) ) |
7097 | exact= 0; | |
3dab1dad YO |
7098 | case NOTHING: |
7099 | break; | |
7100 | default: | |
7101 | exact= 0; | |
7102 | } | |
7103 | } | |
7104 | DEBUG_PARSE_r({ | |
7105 | SV * const mysv=sv_newmortal(); | |
7106 | DEBUG_PARSE_MSG((scan==p ? "tsdy" : "")); | |
7107 | regprop(RExC_rx, mysv, scan); | |
7108 | PerlIO_printf(Perl_debug_log, "~ %s (%s) (%d)\n", | |
7109 | SvPV_nolen_const(mysv), | |
7110 | reg_name[exact], | |
7111 | REG_NODE_NUM(scan)); | |
7112 | }); | |
a0d0e21e LW |
7113 | if (temp == NULL) |
7114 | break; | |
7115 | scan = temp; | |
7116 | } | |
07be1b83 YO |
7117 | DEBUG_PARSE_r({ |
7118 | SV * const mysv_val=sv_newmortal(); | |
7119 | DEBUG_PARSE_MSG(""); | |
7120 | regprop(RExC_rx, mysv_val, val); | |
7121 | PerlIO_printf(Perl_debug_log, "~ attach to %s (%d) offset to %d\n", | |
7122 | SvPV_nolen_const(mysv_val), | |
7123 | REG_NODE_NUM(val), | |
7124 | val - scan | |
7125 | ); | |
7126 | }); | |
c277df42 IZ |
7127 | if (reg_off_by_arg[OP(scan)]) { |
7128 | ARG_SET(scan, val - scan); | |
a0ed51b3 LW |
7129 | } |
7130 | else { | |
c277df42 IZ |
7131 | NEXT_OFF(scan) = val - scan; |
7132 | } | |
3dab1dad YO |
7133 | |
7134 | return exact; | |
a687059c | 7135 | } |
07be1b83 | 7136 | #endif |
a687059c LW |
7137 | |
7138 | /* | |
a687059c LW |
7139 | - regcurly - a little FSA that accepts {\d+,?\d*} |
7140 | */ | |
79072805 | 7141 | STATIC I32 |
5f66b61c | 7142 | S_regcurly(register const char *s) |
a687059c LW |
7143 | { |
7144 | if (*s++ != '{') | |
7145 | return FALSE; | |
f0fcb552 | 7146 | if (!isDIGIT(*s)) |
a687059c | 7147 | return FALSE; |
f0fcb552 | 7148 | while (isDIGIT(*s)) |
a687059c LW |
7149 | s++; |
7150 | if (*s == ',') | |
7151 | s++; | |
f0fcb552 | 7152 | while (isDIGIT(*s)) |
a687059c LW |
7153 | s++; |
7154 | if (*s != '}') | |
7155 | return FALSE; | |
7156 | return TRUE; | |
7157 | } | |
7158 | ||
a687059c LW |
7159 | |
7160 | /* | |
fd181c75 | 7161 | - regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form |
a687059c LW |
7162 | */ |
7163 | void | |
097eb12c | 7164 | Perl_regdump(pTHX_ const regexp *r) |
a687059c | 7165 | { |
35ff7856 | 7166 | #ifdef DEBUGGING |
97aff369 | 7167 | dVAR; |
c445ea15 | 7168 | SV * const sv = sv_newmortal(); |
ab3bbdeb | 7169 | SV *dsv= sv_newmortal(); |
a687059c | 7170 | |
786e8c11 | 7171 | (void)dumpuntil(r, r->program, r->program + 1, NULL, NULL, sv, 0, 0); |
a0d0e21e LW |
7172 | |
7173 | /* Header fields of interest. */ | |
ab3bbdeb YO |
7174 | if (r->anchored_substr) { |
7175 | RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->anchored_substr), | |
7176 | RE_SV_DUMPLEN(r->anchored_substr), 30); | |
7b0972df | 7177 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb YO |
7178 | "anchored %s%s at %"IVdf" ", |
7179 | s, RE_SV_TAIL(r->anchored_substr), | |
7b0972df | 7180 | (IV)r->anchored_offset); |
ab3bbdeb YO |
7181 | } else if (r->anchored_utf8) { |
7182 | RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->anchored_utf8), | |
7183 | RE_SV_DUMPLEN(r->anchored_utf8), 30); | |
33b8afdf | 7184 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb YO |
7185 | "anchored utf8 %s%s at %"IVdf" ", |
7186 | s, RE_SV_TAIL(r->anchored_utf8), | |
33b8afdf | 7187 | (IV)r->anchored_offset); |
ab3bbdeb YO |
7188 | } |
7189 | if (r->float_substr) { | |
7190 | RE_PV_QUOTED_DECL(s, 0, dsv, SvPVX_const(r->float_substr), | |
7191 | RE_SV_DUMPLEN(r->float_substr), 30); | |
7b0972df | 7192 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb YO |
7193 | "floating %s%s at %"IVdf"..%"UVuf" ", |
7194 | s, RE_SV_TAIL(r->float_substr), | |
7b0972df | 7195 | (IV)r->float_min_offset, (UV)r->float_max_offset); |
ab3bbdeb YO |
7196 | } else if (r->float_utf8) { |
7197 | RE_PV_QUOTED_DECL(s, 1, dsv, SvPVX_const(r->float_utf8), | |
7198 | RE_SV_DUMPLEN(r->float_utf8), 30); | |
33b8afdf | 7199 | PerlIO_printf(Perl_debug_log, |
ab3bbdeb YO |
7200 | "floating utf8 %s%s at %"IVdf"..%"UVuf" ", |
7201 | s, RE_SV_TAIL(r->float_utf8), | |
33b8afdf | 7202 | (IV)r->float_min_offset, (UV)r->float_max_offset); |
ab3bbdeb | 7203 | } |
33b8afdf | 7204 | if (r->check_substr || r->check_utf8) |
b81d288d | 7205 | PerlIO_printf(Perl_debug_log, |
10edeb5d JH |
7206 | (const char *) |
7207 | (r->check_substr == r->float_substr | |
7208 | && r->check_utf8 == r->float_utf8 | |
7209 | ? "(checking floating" : "(checking anchored")); | |
c277df42 IZ |
7210 | if (r->reganch & ROPT_NOSCAN) |
7211 | PerlIO_printf(Perl_debug_log, " noscan"); | |
7212 | if (r->reganch & ROPT_CHECK_ALL) | |
7213 | PerlIO_printf(Perl_debug_log, " isall"); | |
33b8afdf | 7214 | if (r->check_substr || r->check_utf8) |
c277df42 IZ |
7215 | PerlIO_printf(Perl_debug_log, ") "); |
7216 | ||
46fc3d4c | 7217 | if (r->regstclass) { |
32fc9b6a | 7218 | regprop(r, sv, r->regstclass); |
1de06328 | 7219 | PerlIO_printf(Perl_debug_log, "stclass %s ", SvPVX_const(sv)); |
46fc3d4c | 7220 | } |
774d564b | 7221 | if (r->reganch & ROPT_ANCH) { |
7222 | PerlIO_printf(Perl_debug_log, "anchored"); | |
7223 | if (r->reganch & ROPT_ANCH_BOL) | |
7224 | PerlIO_printf(Perl_debug_log, "(BOL)"); | |
c277df42 IZ |
7225 | if (r->reganch & ROPT_ANCH_MBOL) |
7226 | PerlIO_printf(Perl_debug_log, "(MBOL)"); | |
cad2e5aa JH |
7227 | if (r->reganch & ROPT_ANCH_SBOL) |
7228 | PerlIO_printf(Perl_debug_log, "(SBOL)"); | |
774d564b | 7229 | if (r->reganch & ROPT_ANCH_GPOS) |
7230 | PerlIO_printf(Perl_debug_log, "(GPOS)"); | |
7231 | PerlIO_putc(Perl_debug_log, ' '); | |
7232 | } | |
c277df42 IZ |
7233 | if (r->reganch & ROPT_GPOS_SEEN) |
7234 | PerlIO_printf(Perl_debug_log, "GPOS "); | |
a0d0e21e | 7235 | if (r->reganch & ROPT_SKIP) |
760ac839 | 7236 | PerlIO_printf(Perl_debug_log, "plus "); |
a0d0e21e | 7237 | if (r->reganch & ROPT_IMPLICIT) |
760ac839 | 7238 | PerlIO_printf(Perl_debug_log, "implicit "); |
760ac839 | 7239 | PerlIO_printf(Perl_debug_log, "minlen %ld ", (long) r->minlen); |
ce862d02 IZ |
7240 | if (r->reganch & ROPT_EVAL_SEEN) |
7241 | PerlIO_printf(Perl_debug_log, "with eval "); | |
760ac839 | 7242 | PerlIO_printf(Perl_debug_log, "\n"); |
65e66c80 | 7243 | #else |
96a5add6 | 7244 | PERL_UNUSED_CONTEXT; |
65e66c80 | 7245 | PERL_UNUSED_ARG(r); |
17c3b450 | 7246 | #endif /* DEBUGGING */ |
a687059c LW |
7247 | } |
7248 | ||
7249 | /* | |
a0d0e21e LW |
7250 | - regprop - printable representation of opcode |
7251 | */ | |
46fc3d4c | 7252 | void |
32fc9b6a | 7253 | Perl_regprop(pTHX_ const regexp *prog, SV *sv, const regnode *o) |
a687059c | 7254 | { |
35ff7856 | 7255 | #ifdef DEBUGGING |
97aff369 | 7256 | dVAR; |
9b155405 | 7257 | register int k; |
1de06328 | 7258 | GET_RE_DEBUG_FLAGS_DECL; |
a0d0e21e | 7259 | |
54dc92de | 7260 | sv_setpvn(sv, "", 0); |
9b155405 | 7261 | if (OP(o) >= reg_num) /* regnode.type is unsigned */ |
830247a4 IZ |
7262 | /* It would be nice to FAIL() here, but this may be called from |
7263 | regexec.c, and it would be hard to supply pRExC_state. */ | |
7264 | Perl_croak(aTHX_ "Corrupted regexp opcode"); | |
bfed75c6 | 7265 | sv_catpv(sv, reg_name[OP(o)]); /* Take off const! */ |
9b155405 | 7266 | |
3dab1dad | 7267 | k = PL_regkind[OP(o)]; |
9b155405 | 7268 | |
2a782b5b | 7269 | if (k == EXACT) { |
396482e1 | 7270 | SV * const dsv = sv_2mortal(newSVpvs("")); |
ab3bbdeb YO |
7271 | /* Using is_utf8_string() (via PERL_PV_UNI_DETECT) |
7272 | * is a crude hack but it may be the best for now since | |
7273 | * we have no flag "this EXACTish node was UTF-8" | |
7274 | * --jhi */ | |
7275 | const char * const s = | |
ddc5bc0f | 7276 | pv_pretty(dsv, STRING(o), STR_LEN(o), 60, |
ab3bbdeb YO |
7277 | PL_colors[0], PL_colors[1], |
7278 | PERL_PV_ESCAPE_UNI_DETECT | | |
7279 | PERL_PV_PRETTY_ELIPSES | | |
7280 | PERL_PV_PRETTY_LTGT | |
7281 | ); | |
7282 | Perl_sv_catpvf(aTHX_ sv, " %s", s ); | |
bb263b4e | 7283 | } else if (k == TRIE) { |
3dab1dad | 7284 | /* print the details of the trie in dumpuntil instead, as |
4f639d21 | 7285 | * prog->data isn't available here */ |
1de06328 YO |
7286 | const char op = OP(o); |
7287 | const I32 n = ARG(o); | |
7288 | const reg_ac_data * const ac = IS_TRIE_AC(op) ? | |
7289 | (reg_ac_data *)prog->data->data[n] : | |
7290 | NULL; | |
7291 | const reg_trie_data * const trie = !IS_TRIE_AC(op) ? | |
7292 | (reg_trie_data*)prog->data->data[n] : | |
7293 | ac->trie; | |
7294 | ||
7295 | Perl_sv_catpvf(aTHX_ sv, "-%s",reg_name[o->flags]); | |
7296 | DEBUG_TRIE_COMPILE_r( | |
7297 | Perl_sv_catpvf(aTHX_ sv, | |
7298 | "<S:%"UVuf"/%"IVdf" W:%"UVuf" L:%"UVuf"/%"UVuf" C:%"UVuf"/%"UVuf">", | |
7299 | (UV)trie->startstate, | |
7300 | (IV)trie->laststate-1, | |
7301 | (UV)trie->wordcount, | |
7302 | (UV)trie->minlen, | |
7303 | (UV)trie->maxlen, | |
7304 | (UV)TRIE_CHARCOUNT(trie), | |
7305 | (UV)trie->uniquecharcount | |
7306 | ) | |
7307 | ); | |
7308 | if ( IS_ANYOF_TRIE(op) || trie->bitmap ) { | |
7309 | int i; | |
7310 | int rangestart = -1; | |
f46cb337 | 7311 | U8* bitmap = IS_ANYOF_TRIE(op) ? (U8*)ANYOF_BITMAP(o) : (U8*)TRIE_BITMAP(trie); |
1de06328 YO |
7312 | Perl_sv_catpvf(aTHX_ sv, "["); |
7313 | for (i = 0; i <= 256; i++) { | |
7314 | if (i < 256 && BITMAP_TEST(bitmap,i)) { | |
7315 | if (rangestart == -1) | |
7316 | rangestart = i; | |
7317 | } else if (rangestart != -1) { | |
7318 | if (i <= rangestart + 3) | |
7319 | for (; rangestart < i; rangestart++) | |
7320 | put_byte(sv, rangestart); | |
7321 | else { | |
7322 | put_byte(sv, rangestart); | |
7323 | sv_catpvs(sv, "-"); | |
7324 | put_byte(sv, i - 1); | |
7325 | } | |
7326 | rangestart = -1; | |
7327 | } | |
7328 | } | |
7329 | Perl_sv_catpvf(aTHX_ sv, "]"); | |
7330 | } | |
7331 | ||
a3621e74 | 7332 | } else if (k == CURLY) { |
cb434fcc | 7333 | if (OP(o) == CURLYM || OP(o) == CURLYN || OP(o) == CURLYX) |
cea2e8a9 GS |
7334 | Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */ |
7335 | Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o)); | |
a0d0e21e | 7336 | } |
2c2d71f5 JH |
7337 | else if (k == WHILEM && o->flags) /* Ordinal/of */ |
7338 | Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4); | |
9b155405 | 7339 | else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP ) |
894356b3 | 7340 | Perl_sv_catpvf(aTHX_ sv, "%d", (int)ARG(o)); /* Parenth number */ |
9b155405 | 7341 | else if (k == LOGICAL) |
04ebc1ab | 7342 | Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */ |
653099ff GS |
7343 | else if (k == ANYOF) { |
7344 | int i, rangestart = -1; | |
2d03de9c | 7345 | const U8 flags = ANYOF_FLAGS(o); |
0bd48802 AL |
7346 | |
7347 | /* Should be synchronized with * ANYOF_ #xdefines in regcomp.h */ | |
7348 | static const char * const anyofs[] = { | |
653099ff GS |
7349 | "\\w", |
7350 | "\\W", | |
7351 | "\\s", | |
7352 | "\\S", | |
7353 | "\\d", | |
7354 | "\\D", | |
7355 | "[:alnum:]", | |
7356 | "[:^alnum:]", | |
7357 | "[:alpha:]", | |
7358 | "[:^alpha:]", | |
7359 | "[:ascii:]", | |
7360 | "[:^ascii:]", | |
7361 | "[:ctrl:]", | |
7362 | "[:^ctrl:]", | |
7363 | "[:graph:]", | |
7364 | "[:^graph:]", | |
7365 | "[:lower:]", | |
7366 | "[:^lower:]", | |
7367 | "[:print:]", | |
7368 | "[:^print:]", | |
7369 | "[:punct:]", | |
7370 | "[:^punct:]", | |
7371 | "[:upper:]", | |
aaa51d5e | 7372 | "[:^upper:]", |
653099ff | 7373 | "[:xdigit:]", |
aaa51d5e JF |
7374 | "[:^xdigit:]", |
7375 | "[:space:]", | |
7376 | "[:^space:]", | |
7377 | "[:blank:]", | |
7378 | "[:^blank:]" | |
653099ff GS |
7379 | }; |
7380 | ||
19860706 | 7381 | if (flags & ANYOF_LOCALE) |
396482e1 | 7382 | sv_catpvs(sv, "{loc}"); |
19860706 | 7383 | if (flags & ANYOF_FOLD) |
396482e1 | 7384 | sv_catpvs(sv, "{i}"); |
653099ff | 7385 | Perl_sv_catpvf(aTHX_ sv, "[%s", PL_colors[0]); |
19860706 | 7386 | if (flags & ANYOF_INVERT) |
396482e1 | 7387 | sv_catpvs(sv, "^"); |
ffc61ed2 JH |
7388 | for (i = 0; i <= 256; i++) { |
7389 | if (i < 256 && ANYOF_BITMAP_TEST(o,i)) { | |
7390 | if (rangestart == -1) | |
7391 | rangestart = i; | |
7392 | } else if (rangestart != -1) { | |
7393 | if (i <= rangestart + 3) | |
7394 | for (; rangestart < i; rangestart++) | |
653099ff | 7395 | put_byte(sv, rangestart); |
ffc61ed2 JH |
7396 | else { |
7397 | put_byte(sv, rangestart); | |
396482e1 | 7398 | sv_catpvs(sv, "-"); |
ffc61ed2 | 7399 | put_byte(sv, i - 1); |
653099ff | 7400 | } |
ffc61ed2 | 7401 | rangestart = -1; |
653099ff | 7402 | } |
847a199f | 7403 | } |
ffc61ed2 JH |
7404 | |
7405 | if (o->flags & ANYOF_CLASS) | |
bb7a0f54 | 7406 | for (i = 0; i < (int)(sizeof(anyofs)/sizeof(char*)); i++) |
ffc61ed2 JH |
7407 | if (ANYOF_CLASS_TEST(o,i)) |
7408 | sv_catpv(sv, anyofs[i]); | |
7409 | ||
7410 | if (flags & ANYOF_UNICODE) | |
396482e1 | 7411 | sv_catpvs(sv, "{unicode}"); |
1aa99e6b | 7412 | else if (flags & ANYOF_UNICODE_ALL) |
396482e1 | 7413 | sv_catpvs(sv, "{unicode_all}"); |
ffc61ed2 JH |
7414 | |
7415 | { | |
7416 | SV *lv; | |
32fc9b6a | 7417 | SV * const sw = regclass_swash(prog, o, FALSE, &lv, 0); |
b81d288d | 7418 | |
ffc61ed2 JH |
7419 | if (lv) { |
7420 | if (sw) { | |
89ebb4a3 | 7421 | U8 s[UTF8_MAXBYTES_CASE+1]; |
b81d288d | 7422 | |
ffc61ed2 | 7423 | for (i = 0; i <= 256; i++) { /* just the first 256 */ |
1df70142 | 7424 | uvchr_to_utf8(s, i); |
ffc61ed2 | 7425 | |
3568d838 | 7426 | if (i < 256 && swash_fetch(sw, s, TRUE)) { |
ffc61ed2 JH |
7427 | if (rangestart == -1) |
7428 | rangestart = i; | |
7429 | } else if (rangestart != -1) { | |
ffc61ed2 JH |
7430 | if (i <= rangestart + 3) |
7431 | for (; rangestart < i; rangestart++) { | |
2d03de9c AL |
7432 | const U8 * const e = uvchr_to_utf8(s,rangestart); |
7433 | U8 *p; | |
7434 | for(p = s; p < e; p++) | |
ffc61ed2 JH |
7435 | put_byte(sv, *p); |
7436 | } | |
7437 | else { | |
2d03de9c AL |
7438 | const U8 *e = uvchr_to_utf8(s,rangestart); |
7439 | U8 *p; | |
7440 | for (p = s; p < e; p++) | |
ffc61ed2 | 7441 | put_byte(sv, *p); |
396482e1 | 7442 | sv_catpvs(sv, "-"); |
2d03de9c AL |
7443 | e = uvchr_to_utf8(s, i-1); |
7444 | for (p = s; p < e; p++) | |
1df70142 | 7445 | put_byte(sv, *p); |
ffc61ed2 JH |
7446 | } |
7447 | rangestart = -1; | |
7448 | } | |
19860706 | 7449 | } |
ffc61ed2 | 7450 | |
396482e1 | 7451 | sv_catpvs(sv, "..."); /* et cetera */ |
19860706 | 7452 | } |
fde631ed | 7453 | |
ffc61ed2 | 7454 | { |
2e0de35c | 7455 | char *s = savesvpv(lv); |
c445ea15 | 7456 | char * const origs = s; |
b81d288d | 7457 | |
3dab1dad YO |
7458 | while (*s && *s != '\n') |
7459 | s++; | |
b81d288d | 7460 | |
ffc61ed2 | 7461 | if (*s == '\n') { |
2d03de9c | 7462 | const char * const t = ++s; |
ffc61ed2 JH |
7463 | |
7464 | while (*s) { | |
7465 | if (*s == '\n') | |
7466 | *s = ' '; | |
7467 | s++; | |
7468 | } | |
7469 | if (s[-1] == ' ') | |
7470 | s[-1] = 0; | |
7471 | ||
7472 | sv_catpv(sv, t); | |
fde631ed | 7473 | } |
b81d288d | 7474 | |
ffc61ed2 | 7475 | Safefree(origs); |
fde631ed JH |
7476 | } |
7477 | } | |
653099ff | 7478 | } |
ffc61ed2 | 7479 | |
653099ff GS |
7480 | Perl_sv_catpvf(aTHX_ sv, "%s]", PL_colors[1]); |
7481 | } | |
9b155405 | 7482 | else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH)) |
07be1b83 | 7483 | Perl_sv_catpvf(aTHX_ sv, "[%d]", -(o->flags)); |
65e66c80 | 7484 | #else |
96a5add6 | 7485 | PERL_UNUSED_CONTEXT; |
65e66c80 SP |
7486 | PERL_UNUSED_ARG(sv); |
7487 | PERL_UNUSED_ARG(o); | |
f9049ba1 | 7488 | PERL_UNUSED_ARG(prog); |
17c3b450 | 7489 | #endif /* DEBUGGING */ |
35ff7856 | 7490 | } |
a687059c | 7491 | |
cad2e5aa JH |
7492 | SV * |
7493 | Perl_re_intuit_string(pTHX_ regexp *prog) | |
7494 | { /* Assume that RE_INTUIT is set */ | |
97aff369 | 7495 | dVAR; |
a3621e74 | 7496 | GET_RE_DEBUG_FLAGS_DECL; |
96a5add6 AL |
7497 | PERL_UNUSED_CONTEXT; |
7498 | ||
a3621e74 | 7499 | DEBUG_COMPILE_r( |
cfd0369c | 7500 | { |
2d03de9c | 7501 | const char * const s = SvPV_nolen_const(prog->check_substr |
cfd0369c | 7502 | ? prog->check_substr : prog->check_utf8); |
cad2e5aa JH |
7503 | |
7504 | if (!PL_colorset) reginitcolors(); | |
7505 | PerlIO_printf(Perl_debug_log, | |
a0288114 | 7506 | "%sUsing REx %ssubstr:%s \"%s%.60s%s%s\"\n", |
33b8afdf JH |
7507 | PL_colors[4], |
7508 | prog->check_substr ? "" : "utf8 ", | |
7509 | PL_colors[5],PL_colors[0], | |
cad2e5aa JH |
7510 | s, |
7511 | PL_colors[1], | |
7512 | (strlen(s) > 60 ? "..." : "")); | |
7513 | } ); | |
7514 | ||
33b8afdf | 7515 | return prog->check_substr ? prog->check_substr : prog->check_utf8; |
cad2e5aa JH |
7516 | } |
7517 | ||
2b69d0c2 | 7518 | void |
864dbfa3 | 7519 | Perl_pregfree(pTHX_ struct regexp *r) |
a687059c | 7520 | { |
27da23d5 | 7521 | dVAR; |
0df25f3d | 7522 | |
fc32ee4a | 7523 | GET_RE_DEBUG_FLAGS_DECL; |
a3621e74 | 7524 | |
7821416a IZ |
7525 | if (!r || (--r->refcnt > 0)) |
7526 | return; | |
ab3bbdeb | 7527 | DEBUG_COMPILE_r({ |
0df25f3d YO |
7528 | if (!PL_colorset) |
7529 | reginitcolors(); | |
ab3bbdeb YO |
7530 | if (RX_DEBUG(r)){ |
7531 | SV *dsv= sv_newmortal(); | |
7532 | RE_PV_QUOTED_DECL(s, (r->reganch & ROPT_UTF8), | |
7533 | dsv, r->precomp, r->prelen, 60); | |
7534 | PerlIO_printf(Perl_debug_log,"%sFreeing REx:%s %s\n", | |
7535 | PL_colors[4],PL_colors[5],s); | |
7536 | } | |
9e55ce06 | 7537 | }); |
cad2e5aa | 7538 | |
43c5f42d NC |
7539 | /* gcov results gave these as non-null 100% of the time, so there's no |
7540 | optimisation in checking them before calling Safefree */ | |
7541 | Safefree(r->precomp); | |
7542 | Safefree(r->offsets); /* 20010421 MJD */ | |
ed252734 | 7543 | RX_MATCH_COPY_FREE(r); |
f8c7b90f | 7544 | #ifdef PERL_OLD_COPY_ON_WRITE |
ed252734 NC |
7545 | if (r->saved_copy) |
7546 | SvREFCNT_dec(r->saved_copy); | |
7547 | #endif | |
a193d654 GS |
7548 | if (r->substrs) { |
7549 | if (r->anchored_substr) | |
7550 | SvREFCNT_dec(r->anchored_substr); | |
33b8afdf JH |
7551 | if (r->anchored_utf8) |
7552 | SvREFCNT_dec(r->anchored_utf8); | |
a193d654 GS |
7553 | if (r->float_substr) |
7554 | SvREFCNT_dec(r->float_substr); | |
33b8afdf JH |
7555 | if (r->float_utf8) |
7556 | SvREFCNT_dec(r->float_utf8); | |
2779dcf1 | 7557 | Safefree(r->substrs); |
a193d654 | 7558 | } |
c277df42 IZ |
7559 | if (r->data) { |
7560 | int n = r->data->count; | |
f3548bdc DM |
7561 | PAD* new_comppad = NULL; |
7562 | PAD* old_comppad; | |
4026c95a | 7563 | PADOFFSET refcnt; |
dfad63ad | 7564 | |
c277df42 | 7565 | while (--n >= 0) { |
261faec3 | 7566 | /* If you add a ->what type here, update the comment in regcomp.h */ |
c277df42 IZ |
7567 | switch (r->data->what[n]) { |
7568 | case 's': | |
7569 | SvREFCNT_dec((SV*)r->data->data[n]); | |
7570 | break; | |
653099ff GS |
7571 | case 'f': |
7572 | Safefree(r->data->data[n]); | |
7573 | break; | |
dfad63ad HS |
7574 | case 'p': |
7575 | new_comppad = (AV*)r->data->data[n]; | |
7576 | break; | |
c277df42 | 7577 | case 'o': |
dfad63ad | 7578 | if (new_comppad == NULL) |
cea2e8a9 | 7579 | Perl_croak(aTHX_ "panic: pregfree comppad"); |
f3548bdc DM |
7580 | PAD_SAVE_LOCAL(old_comppad, |
7581 | /* Watch out for global destruction's random ordering. */ | |
c445ea15 | 7582 | (SvTYPE(new_comppad) == SVt_PVAV) ? new_comppad : NULL |
f3548bdc | 7583 | ); |
b34c0dd4 | 7584 | OP_REFCNT_LOCK; |
4026c95a SH |
7585 | refcnt = OpREFCNT_dec((OP_4tree*)r->data->data[n]); |
7586 | OP_REFCNT_UNLOCK; | |
7587 | if (!refcnt) | |
9b978d73 | 7588 | op_free((OP_4tree*)r->data->data[n]); |
9b978d73 | 7589 | |
f3548bdc | 7590 | PAD_RESTORE_LOCAL(old_comppad); |
dfad63ad HS |
7591 | SvREFCNT_dec((SV*)new_comppad); |
7592 | new_comppad = NULL; | |
c277df42 IZ |
7593 | break; |
7594 | case 'n': | |
9e55ce06 | 7595 | break; |
07be1b83 | 7596 | case 'T': |
be8e71aa YO |
7597 | { /* Aho Corasick add-on structure for a trie node. |
7598 | Used in stclass optimization only */ | |
07be1b83 YO |
7599 | U32 refcount; |
7600 | reg_ac_data *aho=(reg_ac_data*)r->data->data[n]; | |
7601 | OP_REFCNT_LOCK; | |
7602 | refcount = --aho->refcount; | |
7603 | OP_REFCNT_UNLOCK; | |
7604 | if ( !refcount ) { | |
7605 | Safefree(aho->states); | |
7606 | Safefree(aho->fail); | |
7607 | aho->trie=NULL; /* not necessary to free this as it is | |
7608 | handled by the 't' case */ | |
7609 | Safefree(r->data->data[n]); /* do this last!!!! */ | |
be8e71aa | 7610 | Safefree(r->regstclass); |
07be1b83 YO |
7611 | } |
7612 | } | |
7613 | break; | |
a3621e74 | 7614 | case 't': |
07be1b83 | 7615 | { |
be8e71aa | 7616 | /* trie structure. */ |
07be1b83 YO |
7617 | U32 refcount; |
7618 | reg_trie_data *trie=(reg_trie_data*)r->data->data[n]; | |
7619 | OP_REFCNT_LOCK; | |
7620 | refcount = --trie->refcount; | |
7621 | OP_REFCNT_UNLOCK; | |
7622 | if ( !refcount ) { | |
7623 | Safefree(trie->charmap); | |
7624 | if (trie->widecharmap) | |
7625 | SvREFCNT_dec((SV*)trie->widecharmap); | |
7626 | Safefree(trie->states); | |
7627 | Safefree(trie->trans); | |
7628 | if (trie->bitmap) | |
7629 | Safefree(trie->bitmap); | |
7630 | if (trie->wordlen) | |
7631 | Safefree(trie->wordlen); | |
786e8c11 YO |
7632 | if (trie->jump) |
7633 | Safefree(trie->jump); | |
7634 | if (trie->nextword) | |
7635 | Safefree(trie->nextword); | |
a3621e74 | 7636 | #ifdef DEBUGGING |
be8e71aa YO |
7637 | if (RX_DEBUG(r)) { |
7638 | if (trie->words) | |
7639 | SvREFCNT_dec((SV*)trie->words); | |
7640 | if (trie->revcharmap) | |
7641 | SvREFCNT_dec((SV*)trie->revcharmap); | |
7642 | } | |
a3621e74 | 7643 | #endif |
07be1b83 | 7644 | Safefree(r->data->data[n]); /* do this last!!!! */ |
a3621e74 | 7645 | } |
07be1b83 YO |
7646 | } |
7647 | break; | |
c277df42 | 7648 | default: |
830247a4 | 7649 | Perl_croak(aTHX_ "panic: regfree data code '%c'", r->data->what[n]); |
c277df42 IZ |
7650 | } |
7651 | } | |
7652 | Safefree(r->data->what); | |
7653 | Safefree(r->data); | |
a0d0e21e LW |
7654 | } |
7655 | Safefree(r->startp); | |
7656 | Safefree(r->endp); | |
7657 | Safefree(r); | |
a687059c | 7658 | } |
c277df42 | 7659 | |
76234dfb | 7660 | #ifndef PERL_IN_XSUB_RE |
c277df42 IZ |
7661 | /* |
7662 | - regnext - dig the "next" pointer out of a node | |
c277df42 IZ |
7663 | */ |
7664 | regnode * | |
864dbfa3 | 7665 | Perl_regnext(pTHX_ register regnode *p) |
c277df42 | 7666 | { |
97aff369 | 7667 | dVAR; |
c277df42 IZ |
7668 | register I32 offset; |
7669 | ||
3280af22 | 7670 | if (p == &PL_regdummy) |
c277df42 IZ |
7671 | return(NULL); |
7672 | ||
7673 | offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p)); | |
7674 | if (offset == 0) | |
7675 | return(NULL); | |
7676 | ||
c277df42 | 7677 | return(p+offset); |
c277df42 | 7678 | } |
76234dfb | 7679 | #endif |
c277df42 | 7680 | |
01f988be | 7681 | STATIC void |
cea2e8a9 | 7682 | S_re_croak2(pTHX_ const char* pat1,const char* pat2,...) |
c277df42 IZ |
7683 | { |
7684 | va_list args; | |
7685 | STRLEN l1 = strlen(pat1); | |
7686 | STRLEN l2 = strlen(pat2); | |
7687 | char buf[512]; | |
06bf62c7 | 7688 | SV *msv; |
73d840c0 | 7689 | const char *message; |
c277df42 IZ |
7690 | |
7691 | if (l1 > 510) | |
7692 | l1 = 510; | |
7693 | if (l1 + l2 > 510) | |
7694 | l2 = 510 - l1; | |
7695 | Copy(pat1, buf, l1 , char); | |
7696 | Copy(pat2, buf + l1, l2 , char); | |
3b818b81 GS |
7697 | buf[l1 + l2] = '\n'; |
7698 | buf[l1 + l2 + 1] = '\0'; | |
8736538c AS |
7699 | #ifdef I_STDARG |
7700 | /* ANSI variant takes additional second argument */ | |
c277df42 | 7701 | va_start(args, pat2); |
8736538c AS |
7702 | #else |
7703 | va_start(args); | |
7704 | #endif | |
5a844595 | 7705 | msv = vmess(buf, &args); |
c277df42 | 7706 | va_end(args); |
cfd0369c | 7707 | message = SvPV_const(msv,l1); |
c277df42 IZ |
7708 | if (l1 > 512) |
7709 | l1 = 512; | |
7710 | Copy(message, buf, l1 , char); | |
197cf9b9 | 7711 | buf[l1-1] = '\0'; /* Overwrite \n */ |
cea2e8a9 | 7712 | Perl_croak(aTHX_ "%s", buf); |
c277df42 | 7713 | } |
a0ed51b3 LW |
7714 | |
7715 | /* XXX Here's a total kludge. But we need to re-enter for swash routines. */ | |
7716 | ||
76234dfb | 7717 | #ifndef PERL_IN_XSUB_RE |
a0ed51b3 | 7718 | void |
864dbfa3 | 7719 | Perl_save_re_context(pTHX) |
b81d288d | 7720 | { |
97aff369 | 7721 | dVAR; |
1ade1aa1 NC |
7722 | |
7723 | struct re_save_state *state; | |
7724 | ||
7725 | SAVEVPTR(PL_curcop); | |
7726 | SSGROW(SAVESTACK_ALLOC_FOR_RE_SAVE_STATE + 1); | |
7727 | ||
7728 | state = (struct re_save_state *)(PL_savestack + PL_savestack_ix); | |
7729 | PL_savestack_ix += SAVESTACK_ALLOC_FOR_RE_SAVE_STATE; | |
7730 | SSPUSHINT(SAVEt_RE_STATE); | |
7731 | ||
46ab3289 | 7732 | Copy(&PL_reg_state, state, 1, struct re_save_state); |
1ade1aa1 | 7733 | |
a0ed51b3 | 7734 | PL_reg_start_tmp = 0; |
a0ed51b3 | 7735 | PL_reg_start_tmpl = 0; |
c445ea15 | 7736 | PL_reg_oldsaved = NULL; |
a5db57d6 | 7737 | PL_reg_oldsavedlen = 0; |
a5db57d6 | 7738 | PL_reg_maxiter = 0; |
a5db57d6 | 7739 | PL_reg_leftiter = 0; |
c445ea15 | 7740 | PL_reg_poscache = NULL; |
a5db57d6 | 7741 | PL_reg_poscache_size = 0; |
1ade1aa1 NC |
7742 | #ifdef PERL_OLD_COPY_ON_WRITE |
7743 | PL_nrs = NULL; | |
7744 | #endif | |
ada6e8a9 | 7745 | |
c445ea15 AL |
7746 | /* Save $1..$n (#18107: UTF-8 s/(\w+)/uc($1)/e); AMS 20021106. */ |
7747 | if (PL_curpm) { | |
7748 | const REGEXP * const rx = PM_GETRE(PL_curpm); | |
7749 | if (rx) { | |
1df70142 | 7750 | U32 i; |
ada6e8a9 | 7751 | for (i = 1; i <= rx->nparens; i++) { |
1df70142 | 7752 | char digits[TYPE_CHARS(long)]; |
d9fad198 | 7753 | const STRLEN len = my_snprintf(digits, sizeof(digits), "%lu", (long)i); |
49f27e4b NC |
7754 | GV *const *const gvp |
7755 | = (GV**)hv_fetch(PL_defstash, digits, len, 0); | |
7756 | ||
b37c2d43 AL |
7757 | if (gvp) { |
7758 | GV * const gv = *gvp; | |
7759 | if (SvTYPE(gv) == SVt_PVGV && GvSV(gv)) | |
7760 | save_scalar(gv); | |
49f27e4b | 7761 | } |
ada6e8a9 AMS |
7762 | } |
7763 | } | |
7764 | } | |
a0ed51b3 | 7765 | } |
76234dfb | 7766 | #endif |
51371543 | 7767 | |
51371543 | 7768 | static void |
acfe0abc | 7769 | clear_re(pTHX_ void *r) |
51371543 | 7770 | { |
97aff369 | 7771 | dVAR; |
51371543 GS |
7772 | ReREFCNT_dec((regexp *)r); |
7773 | } | |
ffbc6a93 | 7774 | |
a28509cc AL |
7775 | #ifdef DEBUGGING |
7776 | ||
7777 | STATIC void | |
7778 | S_put_byte(pTHX_ SV *sv, int c) | |
7779 | { | |
7780 | if (isCNTRL(c) || c == 255 || !isPRINT(c)) | |
7781 | Perl_sv_catpvf(aTHX_ sv, "\\%o", c); | |
7782 | else if (c == '-' || c == ']' || c == '\\' || c == '^') | |
7783 | Perl_sv_catpvf(aTHX_ sv, "\\%c", c); | |
7784 | else | |
7785 | Perl_sv_catpvf(aTHX_ sv, "%c", c); | |
7786 | } | |
7787 | ||
786e8c11 | 7788 | |
3dab1dad YO |
7789 | #define CLEAR_OPTSTART \ |
7790 | if (optstart) STMT_START { \ | |
07be1b83 | 7791 | DEBUG_OPTIMISE_r(PerlIO_printf(Perl_debug_log, " (%d nodes)\n", node - optstart)); \ |
3dab1dad YO |
7792 | optstart=NULL; \ |
7793 | } STMT_END | |
7794 | ||
786e8c11 | 7795 | #define DUMPUNTIL(b,e) CLEAR_OPTSTART; node=dumpuntil(r,start,(b),(e),last,sv,indent+1,depth+1); |
3dab1dad | 7796 | |
b5a2f8d8 NC |
7797 | STATIC const regnode * |
7798 | S_dumpuntil(pTHX_ const regexp *r, const regnode *start, const regnode *node, | |
786e8c11 YO |
7799 | const regnode *last, const regnode *plast, |
7800 | SV* sv, I32 indent, U32 depth) | |
a28509cc | 7801 | { |
97aff369 | 7802 | dVAR; |
786e8c11 | 7803 | register U8 op = PSEUDO; /* Arbitrary non-END op. */ |
b5a2f8d8 | 7804 | register const regnode *next; |
3dab1dad YO |
7805 | const regnode *optstart= NULL; |
7806 | GET_RE_DEBUG_FLAGS_DECL; | |
a28509cc | 7807 | |
786e8c11 YO |
7808 | #ifdef DEBUG_DUMPUNTIL |
7809 | PerlIO_printf(Perl_debug_log, "--- %d : %d - %d - %d\n",indent,node-start, | |
7810 | last ? last-start : 0,plast ? plast-start : 0); | |
7811 | #endif | |
7812 | ||
7813 | if (plast && plast < last) | |
7814 | last= plast; | |
7815 | ||
7816 | while (PL_regkind[op] != END && (!last || node < last)) { | |
a28509cc AL |
7817 | /* While that wasn't END last time... */ |
7818 | ||
7819 | NODE_ALIGN(node); | |
7820 | op = OP(node); | |
7821 | if (op == CLOSE) | |
786e8c11 | 7822 | indent--; |
b5a2f8d8 | 7823 | next = regnext((regnode *)node); |
07be1b83 | 7824 | |
a28509cc | 7825 | /* Where, what. */ |
8e11feef | 7826 | if (OP(node) == OPTIMIZED) { |
e68ec53f | 7827 | if (!optstart && RE_DEBUG_FLAG(RE_DEBUG_COMPILE_OPTIMISE)) |
8e11feef | 7828 | optstart = node; |
3dab1dad | 7829 | else |
8e11feef | 7830 | goto after_print; |
3dab1dad YO |
7831 | } else |
7832 | CLEAR_OPTSTART; | |
07be1b83 | 7833 | |
32fc9b6a | 7834 | regprop(r, sv, node); |
a28509cc | 7835 | PerlIO_printf(Perl_debug_log, "%4"IVdf":%*s%s", (IV)(node - start), |
786e8c11 | 7836 | (int)(2*indent + 1), "", SvPVX_const(sv)); |
3dab1dad YO |
7837 | |
7838 | if (OP(node) != OPTIMIZED) { | |
8e11feef RGS |
7839 | if (next == NULL) /* Next ptr. */ |
7840 | PerlIO_printf(Perl_debug_log, "(0)"); | |
786e8c11 YO |
7841 | else if (PL_regkind[(U8)op] == BRANCH && PL_regkind[OP(next)] != BRANCH ) |
7842 | PerlIO_printf(Perl_debug_log, "(FAIL)"); | |
8e11feef RGS |
7843 | else |
7844 | PerlIO_printf(Perl_debug_log, "(%"IVdf")", (IV)(next - start)); | |
786e8c11 | 7845 | |
1de06328 | 7846 | /*if (PL_regkind[(U8)op] != TRIE)*/ |
786e8c11 | 7847 | (void)PerlIO_putc(Perl_debug_log, '\n'); |
3dab1dad YO |
7848 | } |
7849 | ||
a28509cc AL |
7850 | after_print: |
7851 | if (PL_regkind[(U8)op] == BRANCHJ) { | |
be8e71aa YO |
7852 | assert(next); |
7853 | { | |
7854 | register const regnode *nnode = (OP(next) == LONGJMP | |
b5a2f8d8 NC |
7855 | ? regnext((regnode *)next) |
7856 | : next); | |
be8e71aa YO |
7857 | if (last && nnode > last) |
7858 | nnode = last; | |
786e8c11 | 7859 | DUMPUNTIL(NEXTOPER(NEXTOPER(node)), nnode); |
be8e71aa | 7860 | } |
a28509cc AL |
7861 | } |
7862 | else if (PL_regkind[(U8)op] == BRANCH) { | |
be8e71aa | 7863 | assert(next); |
786e8c11 | 7864 | DUMPUNTIL(NEXTOPER(node), next); |
a28509cc AL |
7865 | } |
7866 | else if ( PL_regkind[(U8)op] == TRIE ) { | |
1de06328 | 7867 | const char op = OP(node); |
a28509cc | 7868 | const I32 n = ARG(node); |
1de06328 YO |
7869 | const reg_ac_data * const ac = op>=AHOCORASICK ? |
7870 | (reg_ac_data *)r->data->data[n] : | |
7871 | NULL; | |
7872 | const reg_trie_data * const trie = op<AHOCORASICK ? | |
7873 | (reg_trie_data*)r->data->data[n] : | |
7874 | ac->trie; | |
786e8c11 | 7875 | const regnode *nextbranch= NULL; |
a28509cc | 7876 | I32 word_idx; |
1de06328 | 7877 | sv_setpvn(sv, "", 0); |
786e8c11 | 7878 | for (word_idx= 0; word_idx < (I32)trie->wordcount; word_idx++) { |
097eb12c | 7879 | SV ** const elem_ptr = av_fetch(trie->words,word_idx,0); |
786e8c11 YO |
7880 | |
7881 | PerlIO_printf(Perl_debug_log, "%*s%s ", | |
7882 | (int)(2*(indent+3)), "", | |
7883 | elem_ptr ? pv_pretty(sv, SvPV_nolen_const(*elem_ptr), SvCUR(*elem_ptr), 60, | |
ab3bbdeb YO |
7884 | PL_colors[0], PL_colors[1], |
7885 | (SvUTF8(*elem_ptr) ? PERL_PV_ESCAPE_UNI : 0) | | |
7886 | PERL_PV_PRETTY_ELIPSES | | |
7887 | PERL_PV_PRETTY_LTGT | |
786e8c11 YO |
7888 | ) |
7889 | : "???" | |
7890 | ); | |
7891 | if (trie->jump) { | |
7892 | U16 dist= trie->jump[word_idx+1]; | |
7893 | PerlIO_printf(Perl_debug_log, "(%u)\n",(next - dist) - start); | |
7894 | if (dist) { | |
7895 | if (!nextbranch) | |
7896 | nextbranch= next - trie->jump[0]; | |
7897 | DUMPUNTIL(next - dist, nextbranch); | |
7898 | } | |
7899 | if (nextbranch && PL_regkind[OP(nextbranch)]==BRANCH) | |
7900 | nextbranch= regnext((regnode *)nextbranch); | |
7901 | } else { | |
7902 | PerlIO_printf(Perl_debug_log, "\n"); | |
a28509cc | 7903 | } |
786e8c11 YO |
7904 | } |
7905 | if (last && next > last) | |
7906 | node= last; | |
7907 | else | |
7908 | node= next; | |
a28509cc | 7909 | } |
786e8c11 YO |
7910 | else if ( op == CURLY ) { /* "next" might be very big: optimizer */ |
7911 | DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS, | |
7912 | NEXTOPER(node) + EXTRA_STEP_2ARGS + 1); | |
a28509cc AL |
7913 | } |
7914 | else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) { | |
be8e71aa | 7915 | assert(next); |
786e8c11 | 7916 | DUMPUNTIL(NEXTOPER(node) + EXTRA_STEP_2ARGS, next); |
a28509cc AL |
7917 | } |
7918 | else if ( op == PLUS || op == STAR) { | |
786e8c11 | 7919 | DUMPUNTIL(NEXTOPER(node), NEXTOPER(node) + 1); |
a28509cc AL |
7920 | } |
7921 | else if (op == ANYOF) { | |
7922 | /* arglen 1 + class block */ | |
7923 | node += 1 + ((ANYOF_FLAGS(node) & ANYOF_LARGE) | |
7924 | ? ANYOF_CLASS_SKIP : ANYOF_SKIP); | |
7925 | node = NEXTOPER(node); | |
7926 | } | |
7927 | else if (PL_regkind[(U8)op] == EXACT) { | |
7928 | /* Literal string, where present. */ | |
7929 | node += NODE_SZ_STR(node) - 1; | |
7930 | node = NEXTOPER(node); | |
7931 | } | |
7932 | else { | |
7933 | node = NEXTOPER(node); | |
7934 | node += regarglen[(U8)op]; | |
7935 | } | |
7936 | if (op == CURLYX || op == OPEN) | |
786e8c11 | 7937 | indent++; |
a28509cc | 7938 | else if (op == WHILEM) |
786e8c11 | 7939 | indent--; |
a28509cc | 7940 | } |
3dab1dad | 7941 | CLEAR_OPTSTART; |
786e8c11 YO |
7942 | #ifdef DEBUG_DUMPUNTIL |
7943 | PerlIO_printf(Perl_debug_log, "--- %d\n",indent); | |
7944 | #endif | |
1de06328 | 7945 | return node; |
a28509cc AL |
7946 | } |
7947 | ||
7948 | #endif /* DEBUGGING */ | |
7949 | ||
241d1a3b NC |
7950 | /* |
7951 | * Local variables: | |
7952 | * c-indentation-style: bsd | |
7953 | * c-basic-offset: 4 | |
7954 | * indent-tabs-mode: t | |
7955 | * End: | |
7956 | * | |
37442d52 RGS |
7957 | * ex: set ts=8 sts=4 sw=4 noet: |
7958 | */ |