Commit | Line | Data |
a0d0e21e |
1 | /* regcomp.c |
2 | */ |
3 | |
4 | /* |
5 | * "A fair jaw-cracker dwarf-language must be." --Samwise Gamgee |
6 | */ |
7 | |
a687059c |
8 | /* NOTE: this is derived from Henry Spencer's regexp code, and should not |
9 | * confused with the original package (see point 3 below). Thanks, Henry! |
10 | */ |
11 | |
12 | /* Additional note: this code is very heavily munged from Henry's version |
13 | * in places. In some spots I've traded clarity for efficiency, so don't |
14 | * blame Henry for some of the lack of readability. |
15 | */ |
16 | |
e50aee73 |
17 | /* The names of the functions have been changed from regcomp and |
18 | * regexec to pregcomp and pregexec in order to avoid conflicts |
19 | * with the POSIX routines of the same names. |
20 | */ |
21 | |
b9d5759e |
22 | #ifdef PERL_EXT_RE_BUILD |
23 | /* need to replace pregcomp et al, so enable that */ |
24 | # ifndef PERL_IN_XSUB_RE |
25 | # define PERL_IN_XSUB_RE |
26 | # endif |
27 | /* need access to debugger hooks */ |
cad2e5aa |
28 | # if defined(PERL_EXT_RE_DEBUG) && !defined(DEBUGGING) |
b9d5759e |
29 | # define DEBUGGING |
30 | # endif |
31 | #endif |
32 | |
33 | #ifdef PERL_IN_XSUB_RE |
d06ea78c |
34 | /* We *really* need to overwrite these symbols: */ |
56953603 |
35 | # define Perl_pregcomp my_regcomp |
36 | # define Perl_regdump my_regdump |
37 | # define Perl_regprop my_regprop |
d06ea78c |
38 | # define Perl_pregfree my_regfree |
cad2e5aa |
39 | # define Perl_re_intuit_string my_re_intuit_string |
40 | /* *These* symbols are masked to allow static link. */ |
d06ea78c |
41 | # define Perl_regnext my_regnext |
f0b8d043 |
42 | # define Perl_save_re_context my_save_re_context |
d88dccdf |
43 | # define Perl_reginitcolors my_reginitcolors |
c5be433b |
44 | |
45 | # define PERL_NO_GET_CONTEXT |
56953603 |
46 | #endif |
47 | |
f0fcb552 |
48 | /*SUPPRESS 112*/ |
a687059c |
49 | /* |
e50aee73 |
50 | * pregcomp and pregexec -- regsub and regerror are not used in perl |
a687059c |
51 | * |
52 | * Copyright (c) 1986 by University of Toronto. |
53 | * Written by Henry Spencer. Not derived from licensed software. |
54 | * |
55 | * Permission is granted to anyone to use this software for any |
56 | * purpose on any computer system, and to redistribute it freely, |
57 | * subject to the following restrictions: |
58 | * |
59 | * 1. The author is not responsible for the consequences of use of |
60 | * this software, no matter how awful, even if they arise |
61 | * from defects in it. |
62 | * |
63 | * 2. The origin of this software must not be misrepresented, either |
64 | * by explicit claim or by omission. |
65 | * |
66 | * 3. Altered versions must be plainly marked as such, and must not |
67 | * be misrepresented as being the original software. |
68 | * |
69 | * |
70 | **** Alterations to Henry's code are... |
71 | **** |
4eb8286e |
72 | **** Copyright (c) 1991-1999, Larry Wall |
a687059c |
73 | **** |
9ef589d8 |
74 | **** You may distribute under the terms of either the GNU General Public |
75 | **** License or the Artistic License, as specified in the README file. |
76 | |
a687059c |
77 | * |
78 | * Beware that some of this code is subtly aware of the way operator |
79 | * precedence is structured in regular expressions. Serious changes in |
80 | * regular-expression syntax might require a total rethink. |
81 | */ |
82 | #include "EXTERN.h" |
864dbfa3 |
83 | #define PERL_IN_REGCOMP_C |
a687059c |
84 | #include "perl.h" |
d06ea78c |
85 | |
c5be433b |
86 | #ifdef PERL_IN_XSUB_RE |
87 | # if defined(PERL_CAPI) || defined(PERL_OBJECT) |
88 | # include "XSUB.h" |
89 | # endif |
90 | #else |
d06ea78c |
91 | # include "INTERN.h" |
92 | #endif |
c277df42 |
93 | |
94 | #define REG_COMP_C |
a687059c |
95 | #include "regcomp.h" |
96 | |
d4cce5f1 |
97 | #ifdef op |
11343788 |
98 | #undef op |
d4cce5f1 |
99 | #endif /* op */ |
11343788 |
100 | |
fe14fcc3 |
101 | #ifdef MSDOS |
102 | # if defined(BUGGY_MSC6) |
103 | /* MSC 6.00A breaks on op/regexp.t test 85 unless we turn this off */ |
104 | # pragma optimize("a",off) |
105 | /* But MSC 6.00A is happy with 'w', for aliases only across function calls*/ |
106 | # pragma optimize("w",on ) |
107 | # endif /* BUGGY_MSC6 */ |
108 | #endif /* MSDOS */ |
109 | |
a687059c |
110 | #ifndef STATIC |
111 | #define STATIC static |
112 | #endif |
113 | |
114 | #define ISMULT1(c) ((c) == '*' || (c) == '+' || (c) == '?') |
115 | #define ISMULT2(s) ((*s) == '*' || (*s) == '+' || (*s) == '?' || \ |
116 | ((*s) == '{' && regcurly(s))) |
2b69d0c2 |
117 | #ifdef atarist |
118 | #define PERL_META "^$.[()|?+*\\" |
119 | #else |
a687059c |
120 | #define META "^$.[()|?+*\\" |
2b69d0c2 |
121 | #endif |
a687059c |
122 | |
35c8bce7 |
123 | #ifdef SPSTART |
124 | #undef SPSTART /* dratted cpp namespace... */ |
125 | #endif |
a687059c |
126 | /* |
127 | * Flags to be passed up and down. |
128 | */ |
a687059c |
129 | #define WORST 0 /* Worst case. */ |
821b33a5 |
130 | #define HASWIDTH 0x1 /* Known to match non-null strings. */ |
a0d0e21e |
131 | #define SIMPLE 0x2 /* Simple enough to be STAR/PLUS operand. */ |
132 | #define SPSTART 0x4 /* Starts with * or +. */ |
133 | #define TRYAGAIN 0x8 /* Weeded out a declaration. */ |
a687059c |
134 | |
2c2d71f5 |
135 | /* Length of a variant. */ |
136 | |
137 | typedef struct scan_data_t { |
138 | I32 len_min; |
139 | I32 len_delta; |
140 | I32 pos_min; |
141 | I32 pos_delta; |
142 | SV *last_found; |
143 | I32 last_end; /* min value, <0 unless valid. */ |
144 | I32 last_start_min; |
145 | I32 last_start_max; |
146 | SV **longest; /* Either &l_fixed, or &l_float. */ |
147 | SV *longest_fixed; |
148 | I32 offset_fixed; |
149 | SV *longest_float; |
150 | I32 offset_float_min; |
151 | I32 offset_float_max; |
152 | I32 flags; |
153 | I32 whilem_c; |
154 | } scan_data_t; |
155 | |
a687059c |
156 | /* |
e50aee73 |
157 | * Forward declarations for pregcomp()'s friends. |
a687059c |
158 | */ |
a0d0e21e |
159 | |
cd488c12 |
160 | static scan_data_t zero_scan_data = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
2c2d71f5 |
161 | 0, 0, 0, 0 }; |
c277df42 |
162 | |
163 | #define SF_BEFORE_EOL (SF_BEFORE_SEOL|SF_BEFORE_MEOL) |
164 | #define SF_BEFORE_SEOL 0x1 |
165 | #define SF_BEFORE_MEOL 0x2 |
166 | #define SF_FIX_BEFORE_EOL (SF_FIX_BEFORE_SEOL|SF_FIX_BEFORE_MEOL) |
167 | #define SF_FL_BEFORE_EOL (SF_FL_BEFORE_SEOL|SF_FL_BEFORE_MEOL) |
168 | |
09b7f37c |
169 | #ifdef NO_UNARY_PLUS |
170 | # define SF_FIX_SHIFT_EOL (0+2) |
171 | # define SF_FL_SHIFT_EOL (0+4) |
172 | #else |
173 | # define SF_FIX_SHIFT_EOL (+2) |
174 | # define SF_FL_SHIFT_EOL (+4) |
175 | #endif |
c277df42 |
176 | |
177 | #define SF_FIX_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FIX_SHIFT_EOL) |
178 | #define SF_FIX_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FIX_SHIFT_EOL) |
179 | |
180 | #define SF_FL_BEFORE_SEOL (SF_BEFORE_SEOL << SF_FL_SHIFT_EOL) |
181 | #define SF_FL_BEFORE_MEOL (SF_BEFORE_MEOL << SF_FL_SHIFT_EOL) /* 0x20 */ |
182 | #define SF_IS_INF 0x40 |
183 | #define SF_HAS_PAR 0x80 |
184 | #define SF_IN_PAR 0x100 |
185 | #define SF_HAS_EVAL 0x200 |
4bfe0158 |
186 | #define SCF_DO_SUBSTR 0x400 |
c277df42 |
187 | |
a0ed51b3 |
188 | #define RF_utf8 8 |
189 | #define UTF (PL_reg_flags & RF_utf8) |
190 | #define LOC (PL_regflags & PMf_LOCALE) |
191 | #define FOLD (PL_regflags & PMf_FOLD) |
192 | |
b8c5462f |
193 | #define OOB_CHAR8 1234 |
194 | #define OOB_UTF8 123456 |
93733859 |
195 | #define OOB_NAMEDCLASS -1 |
b8c5462f |
196 | |
a0ed51b3 |
197 | #define CHR_SVLEN(sv) (UTF ? sv_len_utf8(sv) : SvCUR(sv)) |
198 | #define CHR_DIST(a,b) (UTF ? utf8_distance(a,b) : a - b) |
199 | |
cd439c50 |
200 | /* Allow for side effects in s */ |
201 | #define REGC(c,s) STMT_START { if (!SIZE_ONLY) *(s) = (c); else (s);} STMT_END |
202 | |
51371543 |
203 | static void clear_re(pTHXo_ void *r); |
4327152a |
204 | |
205 | STATIC void |
cea2e8a9 |
206 | S_scan_commit(pTHX_ scan_data_t *data) |
c277df42 |
207 | { |
c485e607 |
208 | dTHR; |
a0ed51b3 |
209 | STRLEN l = CHR_SVLEN(data->last_found); |
210 | STRLEN old_l = CHR_SVLEN(*data->longest); |
c277df42 |
211 | |
212 | if ((l >= old_l) && ((l > old_l) || (data->flags & SF_BEFORE_EOL))) { |
213 | sv_setsv(*data->longest, data->last_found); |
214 | if (*data->longest == data->longest_fixed) { |
215 | data->offset_fixed = l ? data->last_start_min : data->pos_min; |
216 | if (data->flags & SF_BEFORE_EOL) |
217 | data->flags |
218 | |= ((data->flags & SF_BEFORE_EOL) << SF_FIX_SHIFT_EOL); |
219 | else |
220 | data->flags &= ~SF_FIX_BEFORE_EOL; |
a0ed51b3 |
221 | } |
222 | else { |
c277df42 |
223 | data->offset_float_min = l ? data->last_start_min : data->pos_min; |
224 | data->offset_float_max = (l |
225 | ? data->last_start_max |
226 | : data->pos_min + data->pos_delta); |
227 | if (data->flags & SF_BEFORE_EOL) |
228 | data->flags |
229 | |= ((data->flags & SF_BEFORE_EOL) << SF_FL_SHIFT_EOL); |
230 | else |
231 | data->flags &= ~SF_FL_BEFORE_EOL; |
232 | } |
233 | } |
234 | SvCUR_set(data->last_found, 0); |
235 | data->last_end = -1; |
236 | data->flags &= ~SF_BEFORE_EOL; |
237 | } |
238 | |
c277df42 |
239 | /* Stops at toplevel WHILEM as well as at `last'. At end *scanp is set |
240 | to the position after last scanned or to NULL. */ |
241 | |
76e3520e |
242 | STATIC I32 |
cea2e8a9 |
243 | S_study_chunk(pTHX_ regnode **scanp, I32 *deltap, regnode *last, scan_data_t *data, U32 flags) |
c277df42 |
244 | /* scanp: Start here (read-write). */ |
245 | /* deltap: Write maxlen-minlen here. */ |
246 | /* last: Stop before this one. */ |
247 | { |
5c0ca799 |
248 | dTHR; |
c277df42 |
249 | I32 min = 0, pars = 0, code; |
250 | regnode *scan = *scanp, *next; |
251 | I32 delta = 0; |
252 | int is_inf = (flags & SCF_DO_SUBSTR) && (data->flags & SF_IS_INF); |
aca2d497 |
253 | int is_inf_internal = 0; /* The studied chunk is infinite */ |
c277df42 |
254 | I32 is_par = OP(scan) == OPEN ? ARG(scan) : 0; |
255 | scan_data_t data_fake; |
256 | |
257 | while (scan && OP(scan) != END && scan < last) { |
258 | /* Peephole optimizer: */ |
259 | |
22c35a8c |
260 | if (PL_regkind[(U8)OP(scan)] == EXACT) { |
c277df42 |
261 | regnode *n = regnext(scan); |
262 | U32 stringok = 1; |
263 | #ifdef DEBUGGING |
264 | regnode *stop = scan; |
265 | #endif |
266 | |
cd439c50 |
267 | next = scan + NODE_SZ_STR(scan); |
c277df42 |
268 | /* Skip NOTHING, merge EXACT*. */ |
269 | while (n && |
22c35a8c |
270 | ( PL_regkind[(U8)OP(n)] == NOTHING || |
c277df42 |
271 | (stringok && (OP(n) == OP(scan)))) |
272 | && NEXT_OFF(n) |
273 | && NEXT_OFF(scan) + NEXT_OFF(n) < I16_MAX) { |
274 | if (OP(n) == TAIL || n > next) |
275 | stringok = 0; |
22c35a8c |
276 | if (PL_regkind[(U8)OP(n)] == NOTHING) { |
c277df42 |
277 | NEXT_OFF(scan) += NEXT_OFF(n); |
278 | next = n + NODE_STEP_REGNODE; |
279 | #ifdef DEBUGGING |
280 | if (stringok) |
281 | stop = n; |
282 | #endif |
283 | n = regnext(n); |
a0ed51b3 |
284 | } |
285 | else { |
cd439c50 |
286 | int oldl = STR_LEN(scan); |
c277df42 |
287 | regnode *nnext = regnext(n); |
288 | |
cd439c50 |
289 | if (oldl + STR_LEN(n) > U8_MAX) |
c277df42 |
290 | break; |
291 | NEXT_OFF(scan) += NEXT_OFF(n); |
cd439c50 |
292 | STR_LEN(scan) += STR_LEN(n); |
293 | next = n + NODE_SZ_STR(n); |
c277df42 |
294 | /* Now we can overwrite *n : */ |
cd439c50 |
295 | Move(STRING(n), STRING(scan) + oldl, |
296 | STR_LEN(n), char); |
c277df42 |
297 | #ifdef DEBUGGING |
298 | if (stringok) |
299 | stop = next - 1; |
300 | #endif |
301 | n = nnext; |
302 | } |
303 | } |
304 | #ifdef DEBUGGING |
305 | /* Allow dumping */ |
cd439c50 |
306 | n = scan + NODE_SZ_STR(scan); |
c277df42 |
307 | while (n <= stop) { |
ca04da08 |
308 | /* Purify reports a benign UMR here sometimes, because we |
309 | * don't initialize the OP() slot of a node when that node |
310 | * is occupied by just the trailing null of the string in |
311 | * an EXACT node */ |
22c35a8c |
312 | if (PL_regkind[(U8)OP(n)] != NOTHING || OP(n) == NOTHING) { |
c277df42 |
313 | OP(n) = OPTIMIZED; |
314 | NEXT_OFF(n) = 0; |
315 | } |
316 | n++; |
317 | } |
318 | #endif |
319 | |
320 | } |
321 | if (OP(scan) != CURLYX) { |
048cfca1 |
322 | int max = (reg_off_by_arg[OP(scan)] |
323 | ? I32_MAX |
324 | /* I32 may be smaller than U16 on CRAYs! */ |
325 | : (I32_MAX < U16_MAX ? I32_MAX : U16_MAX)); |
c277df42 |
326 | int off = (reg_off_by_arg[OP(scan)] ? ARG(scan) : NEXT_OFF(scan)); |
327 | int noff; |
328 | regnode *n = scan; |
329 | |
330 | /* Skip NOTHING and LONGJMP. */ |
331 | while ((n = regnext(n)) |
22c35a8c |
332 | && ((PL_regkind[(U8)OP(n)] == NOTHING && (noff = NEXT_OFF(n))) |
c277df42 |
333 | || ((OP(n) == LONGJMP) && (noff = ARG(n)))) |
334 | && off + noff < max) |
335 | off += noff; |
336 | if (reg_off_by_arg[OP(scan)]) |
337 | ARG(scan) = off; |
338 | else |
339 | NEXT_OFF(scan) = off; |
340 | } |
341 | if (OP(scan) == BRANCH || OP(scan) == BRANCHJ |
342 | || OP(scan) == IFTHEN || OP(scan) == SUSPEND) { |
343 | next = regnext(scan); |
344 | code = OP(scan); |
345 | |
346 | if (OP(next) == code || code == IFTHEN || code == SUSPEND) { |
347 | I32 max1 = 0, min1 = I32_MAX, num = 0; |
348 | |
349 | if (flags & SCF_DO_SUBSTR) |
350 | scan_commit(data); |
351 | while (OP(scan) == code) { |
352 | I32 deltanext, minnext; |
353 | |
354 | num++; |
355 | data_fake.flags = 0; |
2c2d71f5 |
356 | if (data) |
357 | data_fake.whilem_c = data->whilem_c; |
c277df42 |
358 | next = regnext(scan); |
359 | scan = NEXTOPER(scan); |
360 | if (code != BRANCH) |
361 | scan = NEXTOPER(scan); |
362 | /* We suppose the run is continuous, last=next...*/ |
363 | minnext = study_chunk(&scan, &deltanext, next, |
364 | &data_fake, 0); |
365 | if (min1 > minnext) |
366 | min1 = minnext; |
367 | if (max1 < minnext + deltanext) |
368 | max1 = minnext + deltanext; |
369 | if (deltanext == I32_MAX) |
aca2d497 |
370 | is_inf = is_inf_internal = 1; |
c277df42 |
371 | scan = next; |
372 | if (data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) |
373 | pars++; |
405ff068 |
374 | if (data && (data_fake.flags & SF_HAS_EVAL)) |
c277df42 |
375 | data->flags |= SF_HAS_EVAL; |
2c2d71f5 |
376 | if (data) |
377 | data->whilem_c = data_fake.whilem_c; |
c277df42 |
378 | if (code == SUSPEND) |
379 | break; |
380 | } |
381 | if (code == IFTHEN && num < 2) /* Empty ELSE branch */ |
382 | min1 = 0; |
383 | if (flags & SCF_DO_SUBSTR) { |
384 | data->pos_min += min1; |
385 | data->pos_delta += max1 - min1; |
386 | if (max1 != min1 || is_inf) |
387 | data->longest = &(data->longest_float); |
388 | } |
389 | min += min1; |
390 | delta += max1 - min1; |
a0ed51b3 |
391 | } |
392 | else if (code == BRANCHJ) /* single branch is optimized. */ |
c277df42 |
393 | scan = NEXTOPER(NEXTOPER(scan)); |
394 | else /* single branch is optimized. */ |
395 | scan = NEXTOPER(scan); |
396 | continue; |
a0ed51b3 |
397 | } |
398 | else if (OP(scan) == EXACT) { |
cd439c50 |
399 | I32 l = STR_LEN(scan); |
a0ed51b3 |
400 | if (UTF) { |
cd439c50 |
401 | unsigned char *s = (unsigned char *)STRING(scan); |
a0ed51b3 |
402 | unsigned char *e = s + l; |
403 | I32 newl = 0; |
404 | while (s < e) { |
405 | newl++; |
406 | s += UTF8SKIP(s); |
407 | } |
408 | l = newl; |
409 | } |
410 | min += l; |
c277df42 |
411 | if (flags & SCF_DO_SUBSTR) { /* Update longest substr. */ |
c277df42 |
412 | /* The code below prefers earlier match for fixed |
413 | offset, later match for variable offset. */ |
414 | if (data->last_end == -1) { /* Update the start info. */ |
415 | data->last_start_min = data->pos_min; |
416 | data->last_start_max = is_inf |
417 | ? I32_MAX : data->pos_min + data->pos_delta; |
418 | } |
cd439c50 |
419 | sv_catpvn(data->last_found, STRING(scan), STR_LEN(scan)); |
c277df42 |
420 | data->last_end = data->pos_min + l; |
421 | data->pos_min += l; /* As in the first entry. */ |
422 | data->flags &= ~SF_BEFORE_EOL; |
423 | } |
a0ed51b3 |
424 | } |
22c35a8c |
425 | else if (PL_regkind[(U8)OP(scan)] == EXACT) { |
cd439c50 |
426 | I32 l = STR_LEN(scan); |
c277df42 |
427 | if (flags & SCF_DO_SUBSTR) |
428 | scan_commit(data); |
a0ed51b3 |
429 | if (UTF) { |
cd439c50 |
430 | unsigned char *s = (unsigned char *)STRING(scan); |
a0ed51b3 |
431 | unsigned char *e = s + l; |
432 | I32 newl = 0; |
433 | while (s < e) { |
434 | newl++; |
435 | s += UTF8SKIP(s); |
436 | } |
437 | l = newl; |
438 | } |
439 | min += l; |
c277df42 |
440 | if (data && (flags & SCF_DO_SUBSTR)) |
a0ed51b3 |
441 | data->pos_min += l; |
442 | } |
4d61ec05 |
443 | else if (strchr((char*)PL_varies,OP(scan))) { |
c277df42 |
444 | I32 mincount, maxcount, minnext, deltanext, pos_before, fl; |
445 | regnode *oscan = scan; |
446 | |
22c35a8c |
447 | switch (PL_regkind[(U8)OP(scan)]) { |
c277df42 |
448 | case WHILEM: |
449 | scan = NEXTOPER(scan); |
450 | goto finish; |
451 | case PLUS: |
452 | if (flags & SCF_DO_SUBSTR) { |
453 | next = NEXTOPER(scan); |
454 | if (OP(next) == EXACT) { |
455 | mincount = 1; |
456 | maxcount = REG_INFTY; |
457 | next = regnext(scan); |
458 | scan = NEXTOPER(scan); |
459 | goto do_curly; |
460 | } |
461 | } |
462 | if (flags & SCF_DO_SUBSTR) |
463 | data->pos_min++; |
464 | min++; |
465 | /* Fall through. */ |
466 | case STAR: |
aca2d497 |
467 | is_inf = is_inf_internal = 1; |
c277df42 |
468 | scan = regnext(scan); |
469 | if (flags & SCF_DO_SUBSTR) { |
470 | scan_commit(data); |
471 | data->longest = &(data->longest_float); |
472 | } |
473 | goto optimize_curly_tail; |
474 | case CURLY: |
475 | mincount = ARG1(scan); |
476 | maxcount = ARG2(scan); |
477 | next = regnext(scan); |
478 | scan = NEXTOPER(scan) + EXTRA_STEP_2ARGS; |
479 | do_curly: |
480 | if (flags & SCF_DO_SUBSTR) { |
481 | if (mincount == 0) scan_commit(data); |
482 | pos_before = data->pos_min; |
483 | } |
484 | if (data) { |
485 | fl = data->flags; |
486 | data->flags &= ~(SF_HAS_PAR|SF_IN_PAR|SF_HAS_EVAL); |
487 | if (is_inf) |
488 | data->flags |= SF_IS_INF; |
489 | } |
490 | /* This will finish on WHILEM, setting scan, or on NULL: */ |
491 | minnext = study_chunk(&scan, &deltanext, last, data, |
492 | mincount == 0 |
493 | ? (flags & ~SCF_DO_SUBSTR) : flags); |
494 | if (!scan) /* It was not CURLYX, but CURLY. */ |
495 | scan = next; |
599cee73 |
496 | if (ckWARN(WARN_UNSAFE) && (minnext + deltanext == 0) |
821b33a5 |
497 | && !(data->flags & (SF_HAS_PAR|SF_IN_PAR)) |
17feb5d5 |
498 | && maxcount <= REG_INFTY/3) /* Complement check for big count */ |
c5be433b |
499 | Perl_warner(aTHX_ WARN_UNSAFE, |
500 | "Strange *+?{} on zero-length expression"); |
c277df42 |
501 | min += minnext * mincount; |
aca2d497 |
502 | is_inf_internal |= (maxcount == REG_INFTY |
503 | && (minnext + deltanext) > 0 |
504 | || deltanext == I32_MAX); |
505 | is_inf |= is_inf_internal; |
c277df42 |
506 | delta += (minnext + deltanext) * maxcount - minnext * mincount; |
507 | |
508 | /* Try powerful optimization CURLYX => CURLYN. */ |
c277df42 |
509 | if ( OP(oscan) == CURLYX && data |
510 | && data->flags & SF_IN_PAR |
511 | && !(data->flags & SF_HAS_EVAL) |
512 | && !deltanext && minnext == 1 ) { |
513 | /* Try to optimize to CURLYN. */ |
514 | regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; |
515 | regnode *nxt1 = nxt, *nxt2; |
516 | |
517 | /* Skip open. */ |
518 | nxt = regnext(nxt); |
4d61ec05 |
519 | if (!strchr((char*)PL_simple,OP(nxt)) |
22c35a8c |
520 | && !(PL_regkind[(U8)OP(nxt)] == EXACT |
cd439c50 |
521 | && STR_LEN(nxt) == 1)) |
c277df42 |
522 | goto nogo; |
523 | nxt2 = nxt; |
524 | nxt = regnext(nxt); |
525 | if (OP(nxt) != CLOSE) |
526 | goto nogo; |
527 | /* Now we know that nxt2 is the only contents: */ |
528 | oscan->flags = ARG(nxt); |
529 | OP(oscan) = CURLYN; |
530 | OP(nxt1) = NOTHING; /* was OPEN. */ |
531 | #ifdef DEBUGGING |
532 | OP(nxt1 + 1) = OPTIMIZED; /* was count. */ |
533 | NEXT_OFF(nxt1+ 1) = 0; /* just for consistancy. */ |
534 | NEXT_OFF(nxt2) = 0; /* just for consistancy with CURLY. */ |
535 | OP(nxt) = OPTIMIZED; /* was CLOSE. */ |
536 | OP(nxt + 1) = OPTIMIZED; /* was count. */ |
537 | NEXT_OFF(nxt+ 1) = 0; /* just for consistancy. */ |
538 | #endif |
539 | } |
c277df42 |
540 | nogo: |
541 | |
542 | /* Try optimization CURLYX => CURLYM. */ |
543 | if ( OP(oscan) == CURLYX && data |
c277df42 |
544 | && !(data->flags & SF_HAS_PAR) |
c277df42 |
545 | && !(data->flags & SF_HAS_EVAL) |
546 | && !deltanext ) { |
547 | /* XXXX How to optimize if data == 0? */ |
548 | /* Optimize to a simpler form. */ |
549 | regnode *nxt = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN */ |
550 | regnode *nxt2; |
551 | |
552 | OP(oscan) = CURLYM; |
553 | while ( (nxt2 = regnext(nxt)) /* skip over embedded stuff*/ |
554 | && (OP(nxt2) != WHILEM)) |
555 | nxt = nxt2; |
556 | OP(nxt2) = SUCCEED; /* Whas WHILEM */ |
c277df42 |
557 | /* Need to optimize away parenths. */ |
558 | if (data->flags & SF_IN_PAR) { |
559 | /* Set the parenth number. */ |
560 | regnode *nxt1 = NEXTOPER(oscan) + EXTRA_STEP_2ARGS; /* OPEN*/ |
561 | |
562 | if (OP(nxt) != CLOSE) |
563 | FAIL("panic opt close"); |
564 | oscan->flags = ARG(nxt); |
565 | OP(nxt1) = OPTIMIZED; /* was OPEN. */ |
566 | OP(nxt) = OPTIMIZED; /* was CLOSE. */ |
567 | #ifdef DEBUGGING |
568 | OP(nxt1 + 1) = OPTIMIZED; /* was count. */ |
569 | OP(nxt + 1) = OPTIMIZED; /* was count. */ |
570 | NEXT_OFF(nxt1 + 1) = 0; /* just for consistancy. */ |
571 | NEXT_OFF(nxt + 1) = 0; /* just for consistancy. */ |
572 | #endif |
573 | #if 0 |
574 | while ( nxt1 && (OP(nxt1) != WHILEM)) { |
575 | regnode *nnxt = regnext(nxt1); |
576 | |
577 | if (nnxt == nxt) { |
578 | if (reg_off_by_arg[OP(nxt1)]) |
579 | ARG_SET(nxt1, nxt2 - nxt1); |
580 | else if (nxt2 - nxt1 < U16_MAX) |
581 | NEXT_OFF(nxt1) = nxt2 - nxt1; |
582 | else |
583 | OP(nxt) = NOTHING; /* Cannot beautify */ |
584 | } |
585 | nxt1 = nnxt; |
586 | } |
587 | #endif |
588 | /* Optimize again: */ |
589 | study_chunk(&nxt1, &deltanext, nxt, NULL, 0); |
a0ed51b3 |
590 | } |
591 | else |
c277df42 |
592 | oscan->flags = 0; |
c277df42 |
593 | } |
2c2d71f5 |
594 | else if (OP(oscan) == CURLYX && data && ++data->whilem_c < 16) { |
595 | /* This stays as CURLYX, and can put the count/of pair. */ |
596 | /* Find WHILEM (as in regexec.c) */ |
597 | regnode *nxt = oscan + NEXT_OFF(oscan); |
598 | |
599 | if (OP(PREVOPER(nxt)) == NOTHING) /* LONGJMP */ |
600 | nxt += ARG(nxt); |
601 | PREVOPER(nxt)->flags = data->whilem_c |
602 | | (PL_reg_whilem_seen << 4); /* On WHILEM */ |
603 | } |
c277df42 |
604 | if (data && fl & (SF_HAS_PAR|SF_IN_PAR)) |
605 | pars++; |
606 | if (flags & SCF_DO_SUBSTR) { |
607 | SV *last_str = Nullsv; |
608 | int counted = mincount != 0; |
609 | |
610 | if (data->last_end > 0 && mincount != 0) { /* Ends with a string. */ |
611 | I32 b = pos_before >= data->last_start_min |
612 | ? pos_before : data->last_start_min; |
613 | STRLEN l; |
614 | char *s = SvPV(data->last_found, l); |
a0ed51b3 |
615 | I32 old = b - data->last_start_min; |
616 | |
617 | if (UTF) |
618 | old = utf8_hop((U8*)s, old) - (U8*)s; |
c277df42 |
619 | |
a0ed51b3 |
620 | l -= old; |
c277df42 |
621 | /* Get the added string: */ |
79cb57f6 |
622 | last_str = newSVpvn(s + old, l); |
c277df42 |
623 | if (deltanext == 0 && pos_before == b) { |
624 | /* What was added is a constant string */ |
625 | if (mincount > 1) { |
626 | SvGROW(last_str, (mincount * l) + 1); |
627 | repeatcpy(SvPVX(last_str) + l, |
628 | SvPVX(last_str), l, mincount - 1); |
629 | SvCUR(last_str) *= mincount; |
630 | /* Add additional parts. */ |
631 | SvCUR_set(data->last_found, |
632 | SvCUR(data->last_found) - l); |
633 | sv_catsv(data->last_found, last_str); |
634 | data->last_end += l * (mincount - 1); |
635 | } |
636 | } |
637 | } |
638 | /* It is counted once already... */ |
639 | data->pos_min += minnext * (mincount - counted); |
640 | data->pos_delta += - counted * deltanext + |
641 | (minnext + deltanext) * maxcount - minnext * mincount; |
642 | if (mincount != maxcount) { |
643 | scan_commit(data); |
644 | if (mincount && last_str) { |
645 | sv_setsv(data->last_found, last_str); |
646 | data->last_end = data->pos_min; |
647 | data->last_start_min = |
a0ed51b3 |
648 | data->pos_min - CHR_SVLEN(last_str); |
c277df42 |
649 | data->last_start_max = is_inf |
650 | ? I32_MAX |
651 | : data->pos_min + data->pos_delta |
a0ed51b3 |
652 | - CHR_SVLEN(last_str); |
c277df42 |
653 | } |
654 | data->longest = &(data->longest_float); |
655 | } |
aca2d497 |
656 | SvREFCNT_dec(last_str); |
c277df42 |
657 | } |
405ff068 |
658 | if (data && (fl & SF_HAS_EVAL)) |
c277df42 |
659 | data->flags |= SF_HAS_EVAL; |
660 | optimize_curly_tail: |
c277df42 |
661 | if (OP(oscan) != CURLYX) { |
22c35a8c |
662 | while (PL_regkind[(U8)OP(next = regnext(oscan))] == NOTHING |
c277df42 |
663 | && NEXT_OFF(next)) |
664 | NEXT_OFF(oscan) += NEXT_OFF(next); |
665 | } |
c277df42 |
666 | continue; |
667 | default: /* REF only? */ |
668 | if (flags & SCF_DO_SUBSTR) { |
669 | scan_commit(data); |
670 | data->longest = &(data->longest_float); |
671 | } |
aca2d497 |
672 | is_inf = is_inf_internal = 1; |
c277df42 |
673 | break; |
674 | } |
a0ed51b3 |
675 | } |
4d61ec05 |
676 | else if (strchr((char*)PL_simple,OP(scan)) || PL_regkind[(U8)OP(scan)] == ANYUTF8) { |
c277df42 |
677 | if (flags & SCF_DO_SUBSTR) { |
678 | scan_commit(data); |
679 | data->pos_min++; |
680 | } |
681 | min++; |
a0ed51b3 |
682 | } |
22c35a8c |
683 | else if (PL_regkind[(U8)OP(scan)] == EOL && flags & SCF_DO_SUBSTR) { |
c277df42 |
684 | data->flags |= (OP(scan) == MEOL |
685 | ? SF_BEFORE_MEOL |
686 | : SF_BEFORE_SEOL); |
a0ed51b3 |
687 | } |
22c35a8c |
688 | else if (PL_regkind[(U8)OP(scan)] == BRANCHJ |
c277df42 |
689 | && (scan->flags || data) |
690 | && (OP(scan) == IFMATCH || OP(scan) == UNLESSM)) { |
691 | I32 deltanext, minnext; |
692 | regnode *nscan; |
693 | |
694 | data_fake.flags = 0; |
2c2d71f5 |
695 | if (data) |
696 | data_fake.whilem_c = data->whilem_c; |
c277df42 |
697 | next = regnext(scan); |
698 | nscan = NEXTOPER(NEXTOPER(scan)); |
699 | minnext = study_chunk(&nscan, &deltanext, last, &data_fake, 0); |
700 | if (scan->flags) { |
701 | if (deltanext) { |
702 | FAIL("variable length lookbehind not implemented"); |
a0ed51b3 |
703 | } |
704 | else if (minnext > U8_MAX) { |
57def98f |
705 | FAIL2("lookbehind longer than %"UVuf" not implemented", (UV)U8_MAX); |
c277df42 |
706 | } |
707 | scan->flags = minnext; |
708 | } |
709 | if (data && data_fake.flags & (SF_HAS_PAR|SF_IN_PAR)) |
710 | pars++; |
405ff068 |
711 | if (data && (data_fake.flags & SF_HAS_EVAL)) |
c277df42 |
712 | data->flags |= SF_HAS_EVAL; |
2c2d71f5 |
713 | if (data) |
714 | data->whilem_c = data_fake.whilem_c; |
a0ed51b3 |
715 | } |
716 | else if (OP(scan) == OPEN) { |
c277df42 |
717 | pars++; |
a0ed51b3 |
718 | } |
719 | else if (OP(scan) == CLOSE && ARG(scan) == is_par) { |
c277df42 |
720 | next = regnext(scan); |
721 | |
722 | if ( next && (OP(next) != WHILEM) && next < last) |
c277df42 |
723 | is_par = 0; /* Disable optimization */ |
a0ed51b3 |
724 | } |
725 | else if (OP(scan) == EVAL) { |
c277df42 |
726 | if (data) |
727 | data->flags |= SF_HAS_EVAL; |
728 | } |
0f5d15d6 |
729 | else if (OP(scan) == LOGICAL && scan->flags == 2) { /* Embedded */ |
730 | if (flags & SCF_DO_SUBSTR) { |
731 | scan_commit(data); |
732 | data->longest = &(data->longest_float); |
733 | } |
734 | is_inf = is_inf_internal = 1; |
735 | } |
c277df42 |
736 | /* Else: zero-length, ignore. */ |
737 | scan = regnext(scan); |
738 | } |
739 | |
740 | finish: |
741 | *scanp = scan; |
aca2d497 |
742 | *deltap = is_inf_internal ? I32_MAX : delta; |
c277df42 |
743 | if (flags & SCF_DO_SUBSTR && is_inf) |
744 | data->pos_delta = I32_MAX - data->pos_min; |
745 | if (is_par > U8_MAX) |
746 | is_par = 0; |
747 | if (is_par && pars==1 && data) { |
748 | data->flags |= SF_IN_PAR; |
749 | data->flags &= ~SF_HAS_PAR; |
a0ed51b3 |
750 | } |
751 | else if (pars && data) { |
c277df42 |
752 | data->flags |= SF_HAS_PAR; |
753 | data->flags &= ~SF_IN_PAR; |
754 | } |
755 | return min; |
756 | } |
757 | |
76e3520e |
758 | STATIC I32 |
cea2e8a9 |
759 | S_add_data(pTHX_ I32 n, char *s) |
c277df42 |
760 | { |
5c0ca799 |
761 | dTHR; |
3280af22 |
762 | if (PL_regcomp_rx->data) { |
763 | Renewc(PL_regcomp_rx->data, |
764 | sizeof(*PL_regcomp_rx->data) + sizeof(void*) * (PL_regcomp_rx->data->count + n - 1), |
c277df42 |
765 | char, struct reg_data); |
3280af22 |
766 | Renew(PL_regcomp_rx->data->what, PL_regcomp_rx->data->count + n, U8); |
767 | PL_regcomp_rx->data->count += n; |
a0ed51b3 |
768 | } |
769 | else { |
3280af22 |
770 | Newc(1207, PL_regcomp_rx->data, sizeof(*PL_regcomp_rx->data) + sizeof(void*) * (n - 1), |
c277df42 |
771 | char, struct reg_data); |
3280af22 |
772 | New(1208, PL_regcomp_rx->data->what, n, U8); |
773 | PL_regcomp_rx->data->count = n; |
c277df42 |
774 | } |
3280af22 |
775 | Copy(s, PL_regcomp_rx->data->what + PL_regcomp_rx->data->count - n, n, U8); |
776 | return PL_regcomp_rx->data->count - n; |
c277df42 |
777 | } |
778 | |
d88dccdf |
779 | void |
864dbfa3 |
780 | Perl_reginitcolors(pTHX) |
d88dccdf |
781 | { |
782 | dTHR; |
783 | int i = 0; |
784 | char *s = PerlEnv_getenv("PERL_RE_COLORS"); |
785 | |
786 | if (s) { |
787 | PL_colors[0] = s = savepv(s); |
788 | while (++i < 6) { |
789 | s = strchr(s, '\t'); |
790 | if (s) { |
791 | *s = '\0'; |
792 | PL_colors[i] = ++s; |
793 | } |
794 | else |
c712d376 |
795 | PL_colors[i] = s = ""; |
d88dccdf |
796 | } |
797 | } else { |
798 | while (i < 6) |
799 | PL_colors[i++] = ""; |
800 | } |
801 | PL_colorset = 1; |
802 | } |
803 | |
a687059c |
804 | /* |
e50aee73 |
805 | - pregcomp - compile a regular expression into internal code |
a687059c |
806 | * |
807 | * We can't allocate space until we know how big the compiled form will be, |
808 | * but we can't compile it (and thus know how big it is) until we've got a |
809 | * place to put the code. So we cheat: we compile it twice, once with code |
810 | * generation turned off and size counting turned on, and once "for real". |
811 | * This also means that we don't allocate space until we are sure that the |
812 | * thing really will compile successfully, and we never have to move the |
813 | * code and thus invalidate pointers into it. (Note that it has to be in |
814 | * one piece because free() must be able to free it all.) [NB: not true in perl] |
815 | * |
816 | * Beware that the optimization-preparation code in here knows about some |
817 | * of the structure of the compiled regexp. [I'll say.] |
818 | */ |
819 | regexp * |
864dbfa3 |
820 | Perl_pregcomp(pTHX_ char *exp, char *xend, PMOP *pm) |
a687059c |
821 | { |
5c0ca799 |
822 | dTHR; |
a0d0e21e |
823 | register regexp *r; |
c277df42 |
824 | regnode *scan; |
825 | SV **longest; |
826 | SV *longest_fixed; |
827 | SV *longest_float; |
828 | regnode *first; |
a0d0e21e |
829 | I32 flags; |
a0d0e21e |
830 | I32 minlen = 0; |
831 | I32 sawplus = 0; |
832 | I32 sawopen = 0; |
2c2d71f5 |
833 | scan_data_t data; |
a0d0e21e |
834 | |
835 | if (exp == NULL) |
c277df42 |
836 | FAIL("NULL regexp argument"); |
a0d0e21e |
837 | |
e24b16f9 |
838 | if (PL_curcop == &PL_compiling ? (PL_hints & HINT_UTF8) : IN_UTF8) |
a0ed51b3 |
839 | PL_reg_flags |= RF_utf8; |
840 | else |
841 | PL_reg_flags = 0; |
842 | |
3280af22 |
843 | PL_regprecomp = savepvn(exp, xend - exp); |
35ef4773 |
844 | DEBUG_r(if (!PL_colorset) reginitcolors()); |
2c2d71f5 |
845 | DEBUG_r(PerlIO_printf(Perl_debug_log, "%sCompiling REx%s `%s%*s%s'\n", |
d88dccdf |
846 | PL_colors[4],PL_colors[5],PL_colors[0], |
847 | xend - exp, PL_regprecomp, PL_colors[1])); |
3280af22 |
848 | PL_regflags = pm->op_pmflags; |
849 | PL_regsawback = 0; |
bbce6d69 |
850 | |
3280af22 |
851 | PL_regseen = 0; |
852 | PL_seen_zerolen = *exp == '^' ? -1 : 0; |
853 | PL_seen_evals = 0; |
854 | PL_extralen = 0; |
c277df42 |
855 | |
bbce6d69 |
856 | /* First pass: determine size, legality. */ |
3280af22 |
857 | PL_regcomp_parse = exp; |
858 | PL_regxend = xend; |
859 | PL_regnaughty = 0; |
860 | PL_regnpar = 1; |
861 | PL_regsize = 0L; |
862 | PL_regcode = &PL_regdummy; |
2c2d71f5 |
863 | PL_reg_whilem_seen = 0; |
cd439c50 |
864 | REGC((U8)REG_MAGIC, (char*)PL_regcode); |
a0d0e21e |
865 | if (reg(0, &flags) == NULL) { |
3280af22 |
866 | Safefree(PL_regprecomp); |
867 | PL_regprecomp = Nullch; |
a0d0e21e |
868 | return(NULL); |
869 | } |
3280af22 |
870 | DEBUG_r(PerlIO_printf(Perl_debug_log, "size %d ", PL_regsize)); |
c277df42 |
871 | |
c277df42 |
872 | /* Small enough for pointer-storage convention? |
873 | If extralen==0, this means that we will not need long jumps. */ |
3280af22 |
874 | if (PL_regsize >= 0x10000L && PL_extralen) |
875 | PL_regsize += PL_extralen; |
c277df42 |
876 | else |
3280af22 |
877 | PL_extralen = 0; |
2c2d71f5 |
878 | if (PL_reg_whilem_seen > 15) |
879 | PL_reg_whilem_seen = 15; |
a0d0e21e |
880 | |
bbce6d69 |
881 | /* Allocate space and initialize. */ |
3280af22 |
882 | Newc(1001, r, sizeof(regexp) + (unsigned)PL_regsize * sizeof(regnode), |
c277df42 |
883 | char, regexp); |
a0d0e21e |
884 | if (r == NULL) |
885 | FAIL("regexp out of space"); |
c277df42 |
886 | r->refcnt = 1; |
bbce6d69 |
887 | r->prelen = xend - exp; |
3280af22 |
888 | r->precomp = PL_regprecomp; |
cf93c79d |
889 | r->subbeg = NULL; |
890 | r->reganch = pm->op_pmflags & PMf_COMPILETIME; |
4327152a |
891 | r->nparens = PL_regnpar - 1; /* set early to validate backrefs */ |
892 | |
893 | r->substrs = 0; /* Useful during FAIL. */ |
894 | r->startp = 0; /* Useful during FAIL. */ |
895 | r->endp = 0; /* Useful during FAIL. */ |
896 | |
3280af22 |
897 | PL_regcomp_rx = r; |
bbce6d69 |
898 | |
899 | /* Second pass: emit code. */ |
3280af22 |
900 | PL_regcomp_parse = exp; |
901 | PL_regxend = xend; |
902 | PL_regnaughty = 0; |
903 | PL_regnpar = 1; |
904 | PL_regcode = r->program; |
2cd61cdb |
905 | /* Store the count of eval-groups for security checks: */ |
3280af22 |
906 | PL_regcode->next_off = ((PL_seen_evals > U16_MAX) ? U16_MAX : PL_seen_evals); |
cd439c50 |
907 | REGC((U8)REG_MAGIC, (char*) PL_regcode++); |
c277df42 |
908 | r->data = 0; |
a0d0e21e |
909 | if (reg(0, &flags) == NULL) |
910 | return(NULL); |
911 | |
912 | /* Dig out information for optimizations. */ |
cf93c79d |
913 | r->reganch = pm->op_pmflags & PMf_COMPILETIME; /* Again? */ |
3280af22 |
914 | pm->op_pmflags = PL_regflags; |
a0ed51b3 |
915 | if (UTF) |
916 | r->reganch |= ROPT_UTF8; |
c277df42 |
917 | r->regstclass = NULL; |
a0ed51b3 |
918 | if (PL_regnaughty >= 10) /* Probably an expensive pattern. */ |
919 | r->reganch |= ROPT_NAUGHTY; |
c277df42 |
920 | scan = r->program + 1; /* First BRANCH. */ |
2779dcf1 |
921 | |
922 | /* XXXX To minimize changes to RE engine we always allocate |
923 | 3-units-long substrs field. */ |
924 | Newz(1004, r->substrs, 1, struct reg_substr_data); |
925 | |
2c2d71f5 |
926 | StructCopy(&zero_scan_data, &data, scan_data_t); |
c277df42 |
927 | if (OP(scan) != BRANCH) { /* Only one top-level choice. */ |
c277df42 |
928 | I32 fake; |
c5254dd6 |
929 | STRLEN longest_float_length, longest_fixed_length; |
a0d0e21e |
930 | |
931 | first = scan; |
c277df42 |
932 | /* Skip introductions and multiplicators >= 1. */ |
a0d0e21e |
933 | while ((OP(first) == OPEN && (sawopen = 1)) || |
934 | (OP(first) == BRANCH && OP(regnext(first)) != BRANCH) || |
935 | (OP(first) == PLUS) || |
936 | (OP(first) == MINMOD) || |
22c35a8c |
937 | (PL_regkind[(U8)OP(first)] == CURLY && ARG1(first) > 0) ) { |
a0d0e21e |
938 | if (OP(first) == PLUS) |
939 | sawplus = 1; |
940 | else |
941 | first += regarglen[(U8)OP(first)]; |
942 | first = NEXTOPER(first); |
a687059c |
943 | } |
944 | |
a0d0e21e |
945 | /* Starting-point info. */ |
946 | again: |
c277df42 |
947 | if (OP(first) == EXACT); /* Empty, get anchored substr later. */ |
4d61ec05 |
948 | else if (strchr((char*)PL_simple+4,OP(first))) |
a0d0e21e |
949 | r->regstclass = first; |
22c35a8c |
950 | else if (PL_regkind[(U8)OP(first)] == BOUND || |
951 | PL_regkind[(U8)OP(first)] == NBOUND) |
a0d0e21e |
952 | r->regstclass = first; |
22c35a8c |
953 | else if (PL_regkind[(U8)OP(first)] == BOL) { |
cad2e5aa |
954 | r->reganch |= (OP(first) == MBOL |
955 | ? ROPT_ANCH_MBOL |
956 | : (OP(first) == SBOL |
957 | ? ROPT_ANCH_SBOL |
958 | : ROPT_ANCH_BOL)); |
a0d0e21e |
959 | first = NEXTOPER(first); |
774d564b |
960 | goto again; |
961 | } |
962 | else if (OP(first) == GPOS) { |
963 | r->reganch |= ROPT_ANCH_GPOS; |
964 | first = NEXTOPER(first); |
965 | goto again; |
a0d0e21e |
966 | } |
967 | else if ((OP(first) == STAR && |
22c35a8c |
968 | PL_regkind[(U8)OP(NEXTOPER(first))] == REG_ANY) && |
a0d0e21e |
969 | !(r->reganch & ROPT_ANCH) ) |
970 | { |
971 | /* turn .* into ^.* with an implied $*=1 */ |
cad2e5aa |
972 | int type = OP(NEXTOPER(first)); |
973 | |
974 | if (type == REG_ANY || type == ANYUTF8) |
975 | type = ROPT_ANCH_MBOL; |
976 | else |
977 | type = ROPT_ANCH_SBOL; |
978 | |
979 | r->reganch |= type | ROPT_IMPLICIT; |
a0d0e21e |
980 | first = NEXTOPER(first); |
774d564b |
981 | goto again; |
a0d0e21e |
982 | } |
cad2e5aa |
983 | if (sawplus && (!sawopen || !PL_regsawback) |
984 | && !(PL_regseen & REG_SEEN_EVAL)) /* May examine pos and $& */ |
985 | /* x+ must match at the 1st pos of run of x's */ |
986 | r->reganch |= ROPT_SKIP; |
a0d0e21e |
987 | |
c277df42 |
988 | /* Scan is after the zeroth branch, first is atomic matcher. */ |
989 | DEBUG_r(PerlIO_printf(Perl_debug_log, "first at %d\n", |
990 | first - scan + 1)); |
a0d0e21e |
991 | /* |
992 | * If there's something expensive in the r.e., find the |
993 | * longest literal string that must appear and make it the |
994 | * regmust. Resolve ties in favor of later strings, since |
995 | * the regstart check works with the beginning of the r.e. |
996 | * and avoiding duplication strengthens checking. Not a |
997 | * strong reason, but sufficient in the absence of others. |
998 | * [Now we resolve ties in favor of the earlier string if |
c277df42 |
999 | * it happens that c_offset_min has been invalidated, since the |
a0d0e21e |
1000 | * earlier string may buy us something the later one won't.] |
1001 | */ |
a0d0e21e |
1002 | minlen = 0; |
a687059c |
1003 | |
79cb57f6 |
1004 | data.longest_fixed = newSVpvn("",0); |
1005 | data.longest_float = newSVpvn("",0); |
1006 | data.last_found = newSVpvn("",0); |
c277df42 |
1007 | data.longest = &(data.longest_fixed); |
1008 | first = scan; |
1009 | |
3280af22 |
1010 | minlen = study_chunk(&first, &fake, scan + PL_regsize, /* Up to end */ |
c277df42 |
1011 | &data, SCF_DO_SUBSTR); |
3280af22 |
1012 | if ( PL_regnpar == 1 && data.longest == &(data.longest_fixed) |
c277df42 |
1013 | && data.last_start_min == 0 && data.last_end > 0 |
3280af22 |
1014 | && !PL_seen_zerolen |
1015 | && (!(PL_regseen & REG_SEEN_GPOS) || (r->reganch & ROPT_ANCH_GPOS))) |
c277df42 |
1016 | r->reganch |= ROPT_CHECK_ALL; |
1017 | scan_commit(&data); |
1018 | SvREFCNT_dec(data.last_found); |
1019 | |
a0ed51b3 |
1020 | longest_float_length = CHR_SVLEN(data.longest_float); |
c5254dd6 |
1021 | if (longest_float_length |
c277df42 |
1022 | || (data.flags & SF_FL_BEFORE_EOL |
1023 | && (!(data.flags & SF_FL_BEFORE_MEOL) |
3280af22 |
1024 | || (PL_regflags & PMf_MULTILINE)))) { |
cf93c79d |
1025 | int t; |
1026 | |
a0ed51b3 |
1027 | if (SvCUR(data.longest_fixed) /* ok to leave SvCUR */ |
aca2d497 |
1028 | && data.offset_fixed == data.offset_float_min |
1029 | && SvCUR(data.longest_fixed) == SvCUR(data.longest_float)) |
1030 | goto remove_float; /* As in (a)+. */ |
1031 | |
c277df42 |
1032 | r->float_substr = data.longest_float; |
1033 | r->float_min_offset = data.offset_float_min; |
1034 | r->float_max_offset = data.offset_float_max; |
cf93c79d |
1035 | t = (data.flags & SF_FL_BEFORE_EOL /* Can't have SEOL and MULTI */ |
1036 | && (!(data.flags & SF_FL_BEFORE_MEOL) |
1037 | || (PL_regflags & PMf_MULTILINE))); |
1038 | fbm_compile(r->float_substr, t ? FBMcf_TAIL : 0); |
a0ed51b3 |
1039 | } |
1040 | else { |
aca2d497 |
1041 | remove_float: |
c277df42 |
1042 | r->float_substr = Nullsv; |
1043 | SvREFCNT_dec(data.longest_float); |
c5254dd6 |
1044 | longest_float_length = 0; |
a0d0e21e |
1045 | } |
c277df42 |
1046 | |
a0ed51b3 |
1047 | longest_fixed_length = CHR_SVLEN(data.longest_fixed); |
c5254dd6 |
1048 | if (longest_fixed_length |
c277df42 |
1049 | || (data.flags & SF_FIX_BEFORE_EOL /* Cannot have SEOL and MULTI */ |
1050 | && (!(data.flags & SF_FIX_BEFORE_MEOL) |
3280af22 |
1051 | || (PL_regflags & PMf_MULTILINE)))) { |
cf93c79d |
1052 | int t; |
1053 | |
c277df42 |
1054 | r->anchored_substr = data.longest_fixed; |
1055 | r->anchored_offset = data.offset_fixed; |
cf93c79d |
1056 | t = (data.flags & SF_FIX_BEFORE_EOL /* Can't have SEOL and MULTI */ |
1057 | && (!(data.flags & SF_FIX_BEFORE_MEOL) |
1058 | || (PL_regflags & PMf_MULTILINE))); |
1059 | fbm_compile(r->anchored_substr, t ? FBMcf_TAIL : 0); |
a0ed51b3 |
1060 | } |
1061 | else { |
c277df42 |
1062 | r->anchored_substr = Nullsv; |
1063 | SvREFCNT_dec(data.longest_fixed); |
c5254dd6 |
1064 | longest_fixed_length = 0; |
a0d0e21e |
1065 | } |
c277df42 |
1066 | |
1067 | /* A temporary algorithm prefers floated substr to fixed one to dig more info. */ |
c5254dd6 |
1068 | if (longest_fixed_length > longest_float_length) { |
c277df42 |
1069 | r->check_substr = r->anchored_substr; |
1070 | r->check_offset_min = r->check_offset_max = r->anchored_offset; |
1071 | if (r->reganch & ROPT_ANCH_SINGLE) |
1072 | r->reganch |= ROPT_NOSCAN; |
a0ed51b3 |
1073 | } |
1074 | else { |
c277df42 |
1075 | r->check_substr = r->float_substr; |
1076 | r->check_offset_min = data.offset_float_min; |
1077 | r->check_offset_max = data.offset_float_max; |
a0d0e21e |
1078 | } |
30382c73 |
1079 | /* XXXX Currently intuiting is not compatible with ANCH_GPOS. |
1080 | This should be changed ASAP! */ |
1081 | if (r->check_substr && !(r->reganch & ROPT_ANCH_GPOS)) { |
cad2e5aa |
1082 | r->reganch |= RE_USE_INTUIT; |
1083 | if (SvTAIL(r->check_substr)) |
1084 | r->reganch |= RE_INTUIT_TAIL; |
1085 | } |
a0ed51b3 |
1086 | } |
1087 | else { |
c277df42 |
1088 | /* Several toplevels. Best we can is to set minlen. */ |
1089 | I32 fake; |
1090 | |
1091 | DEBUG_r(PerlIO_printf(Perl_debug_log, "\n")); |
1092 | scan = r->program + 1; |
2c2d71f5 |
1093 | minlen = study_chunk(&scan, &fake, scan + PL_regsize, &data, 0); |
c277df42 |
1094 | r->check_substr = r->anchored_substr = r->float_substr = Nullsv; |
a0d0e21e |
1095 | } |
1096 | |
a0d0e21e |
1097 | r->minlen = minlen; |
3280af22 |
1098 | if (PL_regseen & REG_SEEN_GPOS) |
c277df42 |
1099 | r->reganch |= ROPT_GPOS_SEEN; |
3280af22 |
1100 | if (PL_regseen & REG_SEEN_LOOKBEHIND) |
c277df42 |
1101 | r->reganch |= ROPT_LOOKBEHIND_SEEN; |
3280af22 |
1102 | if (PL_regseen & REG_SEEN_EVAL) |
ce862d02 |
1103 | r->reganch |= ROPT_EVAL_SEEN; |
cf93c79d |
1104 | Newz(1002, r->startp, PL_regnpar, I32); |
1105 | Newz(1002, r->endp, PL_regnpar, I32); |
a0d0e21e |
1106 | DEBUG_r(regdump(r)); |
1107 | return(r); |
a687059c |
1108 | } |
1109 | |
1110 | /* |
1111 | - reg - regular expression, i.e. main body or parenthesized thing |
1112 | * |
1113 | * Caller must absorb opening parenthesis. |
1114 | * |
1115 | * Combining parenthesis handling with the base level of regular expression |
1116 | * is a trifle forced, but the need to tie the tails of the branches to what |
1117 | * follows makes it hard to avoid. |
1118 | */ |
76e3520e |
1119 | STATIC regnode * |
cea2e8a9 |
1120 | S_reg(pTHX_ I32 paren, I32 *flagp) |
c277df42 |
1121 | /* paren: Parenthesized? 0=top, 1=(, inside: changed to letter. */ |
a687059c |
1122 | { |
5c0ca799 |
1123 | dTHR; |
c277df42 |
1124 | register regnode *ret; /* Will be the head of the group. */ |
1125 | register regnode *br; |
1126 | register regnode *lastbr; |
1127 | register regnode *ender = 0; |
a0d0e21e |
1128 | register I32 parno = 0; |
3280af22 |
1129 | I32 flags, oregflags = PL_regflags, have_branch = 0, open = 0; |
c277df42 |
1130 | char c; |
a0d0e21e |
1131 | |
821b33a5 |
1132 | *flagp = 0; /* Tentatively. */ |
a0d0e21e |
1133 | |
1134 | /* Make an OPEN node, if parenthesized. */ |
1135 | if (paren) { |
3280af22 |
1136 | if (*PL_regcomp_parse == '?') { |
ca9dfc88 |
1137 | U16 posflags = 0, negflags = 0; |
1138 | U16 *flagsp = &posflags; |
0f5d15d6 |
1139 | int logical = 0; |
ca9dfc88 |
1140 | |
3280af22 |
1141 | PL_regcomp_parse++; |
1142 | paren = *PL_regcomp_parse++; |
c277df42 |
1143 | ret = NULL; /* For look-ahead/behind. */ |
a0d0e21e |
1144 | switch (paren) { |
c277df42 |
1145 | case '<': |
3280af22 |
1146 | PL_regseen |= REG_SEEN_LOOKBEHIND; |
1147 | if (*PL_regcomp_parse == '!') |
c277df42 |
1148 | paren = ','; |
3280af22 |
1149 | if (*PL_regcomp_parse != '=' && *PL_regcomp_parse != '!') |
c277df42 |
1150 | goto unknown; |
3280af22 |
1151 | PL_regcomp_parse++; |
a0d0e21e |
1152 | case '=': |
1153 | case '!': |
3280af22 |
1154 | PL_seen_zerolen++; |
c277df42 |
1155 | case ':': |
1156 | case '>': |
a0d0e21e |
1157 | break; |
1158 | case '$': |
1159 | case '@': |
c277df42 |
1160 | FAIL2("Sequence (?%c...) not implemented", (int)paren); |
a0d0e21e |
1161 | break; |
1162 | case '#': |
3280af22 |
1163 | while (*PL_regcomp_parse && *PL_regcomp_parse != ')') |
1164 | PL_regcomp_parse++; |
1165 | if (*PL_regcomp_parse != ')') |
c277df42 |
1166 | FAIL("Sequence (?#... not terminated"); |
a0d0e21e |
1167 | nextchar(); |
1168 | *flagp = TRYAGAIN; |
1169 | return NULL; |
0f5d15d6 |
1170 | case 'p': |
1171 | logical = 1; |
1172 | paren = *PL_regcomp_parse++; |
1173 | /* FALL THROUGH */ |
c277df42 |
1174 | case '{': |
1175 | { |
1176 | dTHR; |
1177 | I32 count = 1, n = 0; |
1178 | char c; |
3280af22 |
1179 | char *s = PL_regcomp_parse; |
c277df42 |
1180 | SV *sv; |
1181 | OP_4tree *sop, *rop; |
1182 | |
3280af22 |
1183 | PL_seen_zerolen++; |
1184 | PL_regseen |= REG_SEEN_EVAL; |
1185 | while (count && (c = *PL_regcomp_parse)) { |
1186 | if (c == '\\' && PL_regcomp_parse[1]) |
1187 | PL_regcomp_parse++; |
c277df42 |
1188 | else if (c == '{') |
1189 | count++; |
1190 | else if (c == '}') |
1191 | count--; |
3280af22 |
1192 | PL_regcomp_parse++; |
c277df42 |
1193 | } |
3280af22 |
1194 | if (*PL_regcomp_parse != ')') |
c277df42 |
1195 | FAIL("Sequence (?{...}) not terminated or not {}-balanced"); |
1196 | if (!SIZE_ONLY) { |
1197 | AV *av; |
1198 | |
3280af22 |
1199 | if (PL_regcomp_parse - 1 - s) |
79cb57f6 |
1200 | sv = newSVpvn(s, PL_regcomp_parse - 1 - s); |
c277df42 |
1201 | else |
79cb57f6 |
1202 | sv = newSVpvn("", 0); |
c277df42 |
1203 | |
1204 | rop = sv_compile_2op(sv, &sop, "re", &av); |
1205 | |
dfad63ad |
1206 | n = add_data(3, "nop"); |
3280af22 |
1207 | PL_regcomp_rx->data->data[n] = (void*)rop; |
dfad63ad |
1208 | PL_regcomp_rx->data->data[n+1] = (void*)sop; |
1209 | PL_regcomp_rx->data->data[n+2] = (void*)av; |
c277df42 |
1210 | SvREFCNT_dec(sv); |
a0ed51b3 |
1211 | } |
e24b16f9 |
1212 | else { /* First pass */ |
1213 | if (PL_reginterp_cnt < ++PL_seen_evals |
1214 | && PL_curcop != &PL_compiling) |
2cd61cdb |
1215 | /* No compiled RE interpolated, has runtime |
1216 | components ===> unsafe. */ |
1217 | FAIL("Eval-group not allowed at runtime, use re 'eval'"); |
3280af22 |
1218 | if (PL_tainted) |
cc6b7395 |
1219 | FAIL("Eval-group in insecure regular expression"); |
c277df42 |
1220 | } |
1221 | |
1222 | nextchar(); |
0f5d15d6 |
1223 | if (logical) { |
1224 | ret = reg_node(LOGICAL); |
1225 | if (!SIZE_ONLY) |
1226 | ret->flags = 2; |
1227 | regtail(ret, reganode(EVAL, n)); |
1228 | return ret; |
1229 | } |
c277df42 |
1230 | return reganode(EVAL, n); |
1231 | } |
1232 | case '(': |
1233 | { |
3280af22 |
1234 | if (PL_regcomp_parse[0] == '?') { |
1235 | if (PL_regcomp_parse[1] == '=' || PL_regcomp_parse[1] == '!' |
1236 | || PL_regcomp_parse[1] == '<' |
1237 | || PL_regcomp_parse[1] == '{') { /* Lookahead or eval. */ |
c277df42 |
1238 | I32 flag; |
1239 | |
1240 | ret = reg_node(LOGICAL); |
0f5d15d6 |
1241 | if (!SIZE_ONLY) |
1242 | ret->flags = 1; |
c277df42 |
1243 | regtail(ret, reg(1, &flag)); |
1244 | goto insert_if; |
1245 | } |
a0ed51b3 |
1246 | } |
1247 | else if (PL_regcomp_parse[0] >= '1' && PL_regcomp_parse[0] <= '9' ) { |
3280af22 |
1248 | parno = atoi(PL_regcomp_parse++); |
c277df42 |
1249 | |
3280af22 |
1250 | while (isDIGIT(*PL_regcomp_parse)) |
1251 | PL_regcomp_parse++; |
c277df42 |
1252 | ret = reganode(GROUPP, parno); |
1253 | if ((c = *nextchar()) != ')') |
1254 | FAIL2("Switch (?(number%c not recognized", c); |
1255 | insert_if: |
1256 | regtail(ret, reganode(IFTHEN, 0)); |
1257 | br = regbranch(&flags, 1); |
1258 | if (br == NULL) |
1259 | br = reganode(LONGJMP, 0); |
1260 | else |
1261 | regtail(br, reganode(LONGJMP, 0)); |
1262 | c = *nextchar(); |
d1b80229 |
1263 | if (flags&HASWIDTH) |
1264 | *flagp |= HASWIDTH; |
c277df42 |
1265 | if (c == '|') { |
1266 | lastbr = reganode(IFTHEN, 0); /* Fake one for optimizer. */ |
1267 | regbranch(&flags, 1); |
1268 | regtail(ret, lastbr); |
d1b80229 |
1269 | if (flags&HASWIDTH) |
1270 | *flagp |= HASWIDTH; |
c277df42 |
1271 | c = *nextchar(); |
a0ed51b3 |
1272 | } |
1273 | else |
c277df42 |
1274 | lastbr = NULL; |
1275 | if (c != ')') |
1276 | FAIL("Switch (?(condition)... contains too many branches"); |
1277 | ender = reg_node(TAIL); |
1278 | regtail(br, ender); |
1279 | if (lastbr) { |
1280 | regtail(lastbr, ender); |
1281 | regtail(NEXTOPER(NEXTOPER(lastbr)), ender); |
a0ed51b3 |
1282 | } |
1283 | else |
c277df42 |
1284 | regtail(ret, ender); |
1285 | return ret; |
a0ed51b3 |
1286 | } |
1287 | else { |
3280af22 |
1288 | FAIL2("Unknown condition for (?(%.2s", PL_regcomp_parse); |
c277df42 |
1289 | } |
1290 | } |
1b1626e4 |
1291 | case 0: |
c277df42 |
1292 | FAIL("Sequence (? incomplete"); |
1b1626e4 |
1293 | break; |
a0d0e21e |
1294 | default: |
3280af22 |
1295 | --PL_regcomp_parse; |
ca9dfc88 |
1296 | parse_flags: |
3280af22 |
1297 | while (*PL_regcomp_parse && strchr("iogcmsx", *PL_regcomp_parse)) { |
1298 | if (*PL_regcomp_parse != 'o') |
1299 | pmflag(flagsp, *PL_regcomp_parse); |
1300 | ++PL_regcomp_parse; |
ca9dfc88 |
1301 | } |
3280af22 |
1302 | if (*PL_regcomp_parse == '-') { |
ca9dfc88 |
1303 | flagsp = &negflags; |
3280af22 |
1304 | ++PL_regcomp_parse; |
ca9dfc88 |
1305 | goto parse_flags; |
48c036b1 |
1306 | } |
3280af22 |
1307 | PL_regflags |= posflags; |
1308 | PL_regflags &= ~negflags; |
1309 | if (*PL_regcomp_parse == ':') { |
1310 | PL_regcomp_parse++; |
ca9dfc88 |
1311 | paren = ':'; |
1312 | break; |
1313 | } |
c277df42 |
1314 | unknown: |
3280af22 |
1315 | if (*PL_regcomp_parse != ')') |
1316 | FAIL2("Sequence (?%c...) not recognized", *PL_regcomp_parse); |
a0d0e21e |
1317 | nextchar(); |
1318 | *flagp = TRYAGAIN; |
1319 | return NULL; |
1320 | } |
1321 | } |
1322 | else { |
3280af22 |
1323 | parno = PL_regnpar; |
1324 | PL_regnpar++; |
a0d0e21e |
1325 | ret = reganode(OPEN, parno); |
c277df42 |
1326 | open = 1; |
a0d0e21e |
1327 | } |
a0ed51b3 |
1328 | } |
1329 | else |
a0d0e21e |
1330 | ret = NULL; |
1331 | |
1332 | /* Pick up the branches, linking them together. */ |
c277df42 |
1333 | br = regbranch(&flags, 1); |
a0d0e21e |
1334 | if (br == NULL) |
1335 | return(NULL); |
3280af22 |
1336 | if (*PL_regcomp_parse == '|') { |
1337 | if (!SIZE_ONLY && PL_extralen) { |
c277df42 |
1338 | reginsert(BRANCHJ, br); |
a0ed51b3 |
1339 | } |
1340 | else |
c277df42 |
1341 | reginsert(BRANCH, br); |
1342 | have_branch = 1; |
1343 | if (SIZE_ONLY) |
3280af22 |
1344 | PL_extralen += 1; /* For BRANCHJ-BRANCH. */ |
a0ed51b3 |
1345 | } |
1346 | else if (paren == ':') { |
c277df42 |
1347 | *flagp |= flags&SIMPLE; |
1348 | } |
1349 | if (open) { /* Starts with OPEN. */ |
1350 | regtail(ret, br); /* OPEN -> first. */ |
a0ed51b3 |
1351 | } |
1352 | else if (paren != '?') /* Not Conditional */ |
a0d0e21e |
1353 | ret = br; |
821b33a5 |
1354 | if (flags&HASWIDTH) |
1355 | *flagp |= HASWIDTH; |
a0d0e21e |
1356 | *flagp |= flags&SPSTART; |
c277df42 |
1357 | lastbr = br; |
3280af22 |
1358 | while (*PL_regcomp_parse == '|') { |
1359 | if (!SIZE_ONLY && PL_extralen) { |
c277df42 |
1360 | ender = reganode(LONGJMP,0); |
1361 | regtail(NEXTOPER(NEXTOPER(lastbr)), ender); /* Append to the previous. */ |
1362 | } |
1363 | if (SIZE_ONLY) |
3280af22 |
1364 | PL_extralen += 2; /* Account for LONGJMP. */ |
a0d0e21e |
1365 | nextchar(); |
c277df42 |
1366 | br = regbranch(&flags, 0); |
a687059c |
1367 | if (br == NULL) |
a0d0e21e |
1368 | return(NULL); |
c277df42 |
1369 | regtail(lastbr, br); /* BRANCH -> BRANCH. */ |
1370 | lastbr = br; |
821b33a5 |
1371 | if (flags&HASWIDTH) |
1372 | *flagp |= HASWIDTH; |
a687059c |
1373 | *flagp |= flags&SPSTART; |
a0d0e21e |
1374 | } |
1375 | |
c277df42 |
1376 | if (have_branch || paren != ':') { |
1377 | /* Make a closing node, and hook it on the end. */ |
1378 | switch (paren) { |
1379 | case ':': |
1380 | ender = reg_node(TAIL); |
1381 | break; |
1382 | case 1: |
1383 | ender = reganode(CLOSE, parno); |
1384 | break; |
1385 | case '<': |
c277df42 |
1386 | case ',': |
1387 | case '=': |
1388 | case '!': |
c277df42 |
1389 | *flagp &= ~HASWIDTH; |
821b33a5 |
1390 | /* FALL THROUGH */ |
1391 | case '>': |
1392 | ender = reg_node(SUCCEED); |
c277df42 |
1393 | break; |
1394 | case 0: |
1395 | ender = reg_node(END); |
1396 | break; |
1397 | } |
1398 | regtail(lastbr, ender); |
a0d0e21e |
1399 | |
c277df42 |
1400 | if (have_branch) { |
1401 | /* Hook the tails of the branches to the closing node. */ |
1402 | for (br = ret; br != NULL; br = regnext(br)) { |
1403 | regoptail(br, ender); |
1404 | } |
1405 | } |
a0d0e21e |
1406 | } |
c277df42 |
1407 | |
1408 | { |
1409 | char *p; |
1410 | static char parens[] = "=!<,>"; |
1411 | |
1412 | if (paren && (p = strchr(parens, paren))) { |
1413 | int node = ((p - parens) % 2) ? UNLESSM : IFMATCH; |
1414 | int flag = (p - parens) > 1; |
1415 | |
1416 | if (paren == '>') |
1417 | node = SUSPEND, flag = 0; |
1418 | reginsert(node,ret); |
c277df42 |
1419 | ret->flags = flag; |
c277df42 |
1420 | regtail(ret, reg_node(TAIL)); |
1421 | } |
a0d0e21e |
1422 | } |
1423 | |
1424 | /* Check for proper termination. */ |
ce3e6498 |
1425 | if (paren) { |
1426 | PL_regflags = oregflags; |
1427 | if (PL_regcomp_parse >= PL_regxend || *nextchar() != ')') { |
1428 | FAIL("unmatched () in regexp"); |
1429 | } |
a0ed51b3 |
1430 | } |
1431 | else if (!paren && PL_regcomp_parse < PL_regxend) { |
3280af22 |
1432 | if (*PL_regcomp_parse == ')') { |
a0d0e21e |
1433 | FAIL("unmatched () in regexp"); |
a0ed51b3 |
1434 | } |
1435 | else |
a0d0e21e |
1436 | FAIL("junk on end of regexp"); /* "Can't happen". */ |
1437 | /* NOTREACHED */ |
1438 | } |
a687059c |
1439 | |
a0d0e21e |
1440 | return(ret); |
a687059c |
1441 | } |
1442 | |
1443 | /* |
1444 | - regbranch - one alternative of an | operator |
1445 | * |
1446 | * Implements the concatenation operator. |
1447 | */ |
76e3520e |
1448 | STATIC regnode * |
cea2e8a9 |
1449 | S_regbranch(pTHX_ I32 *flagp, I32 first) |
a687059c |
1450 | { |
5c0ca799 |
1451 | dTHR; |
c277df42 |
1452 | register regnode *ret; |
1453 | register regnode *chain = NULL; |
1454 | register regnode *latest; |
1455 | I32 flags = 0, c = 0; |
a0d0e21e |
1456 | |
c277df42 |
1457 | if (first) |
1458 | ret = NULL; |
1459 | else { |
3280af22 |
1460 | if (!SIZE_ONLY && PL_extralen) |
c277df42 |
1461 | ret = reganode(BRANCHJ,0); |
1462 | else |
1463 | ret = reg_node(BRANCH); |
1464 | } |
1465 | |
1466 | if (!first && SIZE_ONLY) |
3280af22 |
1467 | PL_extralen += 1; /* BRANCHJ */ |
c277df42 |
1468 | |
1469 | *flagp = WORST; /* Tentatively. */ |
a0d0e21e |
1470 | |
3280af22 |
1471 | PL_regcomp_parse--; |
a0d0e21e |
1472 | nextchar(); |
3280af22 |
1473 | while (PL_regcomp_parse < PL_regxend && *PL_regcomp_parse != '|' && *PL_regcomp_parse != ')') { |
a0d0e21e |
1474 | flags &= ~TRYAGAIN; |
1475 | latest = regpiece(&flags); |
1476 | if (latest == NULL) { |
1477 | if (flags & TRYAGAIN) |
1478 | continue; |
1479 | return(NULL); |
a0ed51b3 |
1480 | } |
1481 | else if (ret == NULL) |
c277df42 |
1482 | ret = latest; |
a0d0e21e |
1483 | *flagp |= flags&HASWIDTH; |
c277df42 |
1484 | if (chain == NULL) /* First piece. */ |
a0d0e21e |
1485 | *flagp |= flags&SPSTART; |
1486 | else { |
3280af22 |
1487 | PL_regnaughty++; |
a0d0e21e |
1488 | regtail(chain, latest); |
a687059c |
1489 | } |
a0d0e21e |
1490 | chain = latest; |
c277df42 |
1491 | c++; |
1492 | } |
1493 | if (chain == NULL) { /* Loop ran zero times. */ |
1494 | chain = reg_node(NOTHING); |
1495 | if (ret == NULL) |
1496 | ret = chain; |
1497 | } |
1498 | if (c == 1) { |
1499 | *flagp |= flags&SIMPLE; |
a0d0e21e |
1500 | } |
a687059c |
1501 | |
a0d0e21e |
1502 | return(ret); |
a687059c |
1503 | } |
1504 | |
1505 | /* |
1506 | - regpiece - something followed by possible [*+?] |
1507 | * |
1508 | * Note that the branching code sequences used for ? and the general cases |
1509 | * of * and + are somewhat optimized: they use the same NOTHING node as |
1510 | * both the endmarker for their branch list and the body of the last branch. |
1511 | * It might seem that this node could be dispensed with entirely, but the |
1512 | * endmarker role is not redundant. |
1513 | */ |
76e3520e |
1514 | STATIC regnode * |
cea2e8a9 |
1515 | S_regpiece(pTHX_ I32 *flagp) |
a687059c |
1516 | { |
5c0ca799 |
1517 | dTHR; |
c277df42 |
1518 | register regnode *ret; |
a0d0e21e |
1519 | register char op; |
1520 | register char *next; |
1521 | I32 flags; |
3280af22 |
1522 | char *origparse = PL_regcomp_parse; |
a0d0e21e |
1523 | char *maxpos; |
1524 | I32 min; |
c277df42 |
1525 | I32 max = REG_INFTY; |
a0d0e21e |
1526 | |
1527 | ret = regatom(&flags); |
1528 | if (ret == NULL) { |
1529 | if (flags & TRYAGAIN) |
1530 | *flagp |= TRYAGAIN; |
1531 | return(NULL); |
1532 | } |
1533 | |
3280af22 |
1534 | op = *PL_regcomp_parse; |
a0d0e21e |
1535 | |
3280af22 |
1536 | if (op == '{' && regcurly(PL_regcomp_parse)) { |
1537 | next = PL_regcomp_parse + 1; |
a0d0e21e |
1538 | maxpos = Nullch; |
1539 | while (isDIGIT(*next) || *next == ',') { |
1540 | if (*next == ',') { |
1541 | if (maxpos) |
1542 | break; |
1543 | else |
1544 | maxpos = next; |
a687059c |
1545 | } |
a0d0e21e |
1546 | next++; |
1547 | } |
1548 | if (*next == '}') { /* got one */ |
1549 | if (!maxpos) |
1550 | maxpos = next; |
3280af22 |
1551 | PL_regcomp_parse++; |
1552 | min = atoi(PL_regcomp_parse); |
a0d0e21e |
1553 | if (*maxpos == ',') |
1554 | maxpos++; |
1555 | else |
3280af22 |
1556 | maxpos = PL_regcomp_parse; |
a0d0e21e |
1557 | max = atoi(maxpos); |
1558 | if (!max && *maxpos != '0') |
c277df42 |
1559 | max = REG_INFTY; /* meaning "infinity" */ |
1560 | else if (max >= REG_INFTY) |
1561 | FAIL2("Quantifier in {,} bigger than %d", REG_INFTY - 1); |
3280af22 |
1562 | PL_regcomp_parse = next; |
a0d0e21e |
1563 | nextchar(); |
1564 | |
1565 | do_curly: |
1566 | if ((flags&SIMPLE)) { |
3280af22 |
1567 | PL_regnaughty += 2 + PL_regnaughty / 2; |
a0d0e21e |
1568 | reginsert(CURLY, ret); |
1569 | } |
1570 | else { |
2c2d71f5 |
1571 | regnode *w = reg_node(WHILEM); |
1572 | |
1573 | w->flags = 0; |
1574 | regtail(ret, w); |
3280af22 |
1575 | if (!SIZE_ONLY && PL_extralen) { |
c277df42 |
1576 | reginsert(LONGJMP,ret); |
1577 | reginsert(NOTHING,ret); |
1578 | NEXT_OFF(ret) = 3; /* Go over LONGJMP. */ |
1579 | } |
a0d0e21e |
1580 | reginsert(CURLYX,ret); |
3280af22 |
1581 | if (!SIZE_ONLY && PL_extralen) |
c277df42 |
1582 | NEXT_OFF(ret) = 3; /* Go over NOTHING to LONGJMP. */ |
1583 | regtail(ret, reg_node(NOTHING)); |
1584 | if (SIZE_ONLY) |
2c2d71f5 |
1585 | PL_reg_whilem_seen++, PL_extralen += 3; |
1586 | PL_regnaughty += 4 + PL_regnaughty; /* compound interest */ |
a0d0e21e |
1587 | } |
c277df42 |
1588 | ret->flags = 0; |
a0d0e21e |
1589 | |
1590 | if (min > 0) |
821b33a5 |
1591 | *flagp = WORST; |
1592 | if (max > 0) |
1593 | *flagp |= HASWIDTH; |
a0d0e21e |
1594 | if (max && max < min) |
c277df42 |
1595 | FAIL("Can't do {n,m} with n > m"); |
1596 | if (!SIZE_ONLY) { |
1597 | ARG1_SET(ret, min); |
1598 | ARG2_SET(ret, max); |
a687059c |
1599 | } |
a687059c |
1600 | |
a0d0e21e |
1601 | goto nest_check; |
a687059c |
1602 | } |
a0d0e21e |
1603 | } |
a687059c |
1604 | |
a0d0e21e |
1605 | if (!ISMULT1(op)) { |
1606 | *flagp = flags; |
a687059c |
1607 | return(ret); |
a0d0e21e |
1608 | } |
bb20fd44 |
1609 | |
c277df42 |
1610 | #if 0 /* Now runtime fix should be reliable. */ |
bb20fd44 |
1611 | if (!(flags&HASWIDTH) && op != '?') |
c277df42 |
1612 | FAIL("regexp *+ operand could be empty"); |
1613 | #endif |
bb20fd44 |
1614 | |
a0d0e21e |
1615 | nextchar(); |
1616 | |
821b33a5 |
1617 | *flagp = (op != '+') ? (WORST|SPSTART|HASWIDTH) : (WORST|HASWIDTH); |
a0d0e21e |
1618 | |
1619 | if (op == '*' && (flags&SIMPLE)) { |
1620 | reginsert(STAR, ret); |
c277df42 |
1621 | ret->flags = 0; |
3280af22 |
1622 | PL_regnaughty += 4; |
a0d0e21e |
1623 | } |
1624 | else if (op == '*') { |
1625 | min = 0; |
1626 | goto do_curly; |
a0ed51b3 |
1627 | } |
1628 | else if (op == '+' && (flags&SIMPLE)) { |
a0d0e21e |
1629 | reginsert(PLUS, ret); |
c277df42 |
1630 | ret->flags = 0; |
3280af22 |
1631 | PL_regnaughty += 3; |
a0d0e21e |
1632 | } |
1633 | else if (op == '+') { |
1634 | min = 1; |
1635 | goto do_curly; |
a0ed51b3 |
1636 | } |
1637 | else if (op == '?') { |
a0d0e21e |
1638 | min = 0; max = 1; |
1639 | goto do_curly; |
1640 | } |
1641 | nest_check: |
17feb5d5 |
1642 | if (ckWARN(WARN_UNSAFE) && !SIZE_ONLY && !(flags&HASWIDTH) && max > REG_INFTY/3) { |
cea2e8a9 |
1643 | Perl_warner(aTHX_ WARN_UNSAFE, "%.*s matches null string many times", |
3280af22 |
1644 | PL_regcomp_parse - origparse, origparse); |
a0d0e21e |
1645 | } |
1646 | |
3280af22 |
1647 | if (*PL_regcomp_parse == '?') { |
a0d0e21e |
1648 | nextchar(); |
1649 | reginsert(MINMOD, ret); |
c277df42 |
1650 | regtail(ret, ret + NODE_STEP_REGNODE); |
a0d0e21e |
1651 | } |
3280af22 |
1652 | if (ISMULT2(PL_regcomp_parse)) |
a0d0e21e |
1653 | FAIL("nested *?+ in regexp"); |
1654 | |
1655 | return(ret); |
a687059c |
1656 | } |
1657 | |
1658 | /* |
1659 | - regatom - the lowest level |
1660 | * |
1661 | * Optimization: gobbles an entire sequence of ordinary characters so that |
1662 | * it can turn them into a single node, which is smaller to store and |
1663 | * faster to run. Backslashed characters are exceptions, each becoming a |
1664 | * separate node; the code is simpler that way and it's not worth fixing. |
1665 | * |
1666 | * [Yes, it is worth fixing, some scripts can run twice the speed.] |
1667 | */ |
76e3520e |
1668 | STATIC regnode * |
cea2e8a9 |
1669 | S_regatom(pTHX_ I32 *flagp) |
a687059c |
1670 | { |
5c0ca799 |
1671 | dTHR; |
c277df42 |
1672 | register regnode *ret = 0; |
a0d0e21e |
1673 | I32 flags; |
1674 | |
1675 | *flagp = WORST; /* Tentatively. */ |
1676 | |
1677 | tryagain: |
3280af22 |
1678 | switch (*PL_regcomp_parse) { |
a0d0e21e |
1679 | case '^': |
3280af22 |
1680 | PL_seen_zerolen++; |
a0d0e21e |
1681 | nextchar(); |
3280af22 |
1682 | if (PL_regflags & PMf_MULTILINE) |
c277df42 |
1683 | ret = reg_node(MBOL); |
3280af22 |
1684 | else if (PL_regflags & PMf_SINGLELINE) |
c277df42 |
1685 | ret = reg_node(SBOL); |
a0d0e21e |
1686 | else |
c277df42 |
1687 | ret = reg_node(BOL); |
a0d0e21e |
1688 | break; |
1689 | case '$': |
3280af22 |
1690 | if (PL_regcomp_parse[1]) |
1691 | PL_seen_zerolen++; |
a0d0e21e |
1692 | nextchar(); |
3280af22 |
1693 | if (PL_regflags & PMf_MULTILINE) |
c277df42 |
1694 | ret = reg_node(MEOL); |
3280af22 |
1695 | else if (PL_regflags & PMf_SINGLELINE) |
c277df42 |
1696 | ret = reg_node(SEOL); |
a0d0e21e |
1697 | else |
c277df42 |
1698 | ret = reg_node(EOL); |
a0d0e21e |
1699 | break; |
1700 | case '.': |
1701 | nextchar(); |
a0ed51b3 |
1702 | if (UTF) { |
1703 | if (PL_regflags & PMf_SINGLELINE) |
1704 | ret = reg_node(SANYUTF8); |
1705 | else |
1706 | ret = reg_node(ANYUTF8); |
1707 | *flagp |= HASWIDTH; |
1708 | } |
1709 | else { |
1710 | if (PL_regflags & PMf_SINGLELINE) |
1711 | ret = reg_node(SANY); |
1712 | else |
22c35a8c |
1713 | ret = reg_node(REG_ANY); |
a0ed51b3 |
1714 | *flagp |= HASWIDTH|SIMPLE; |
1715 | } |
3280af22 |
1716 | PL_regnaughty++; |
a0d0e21e |
1717 | break; |
1718 | case '[': |
3280af22 |
1719 | PL_regcomp_parse++; |
a0ed51b3 |
1720 | ret = (UTF ? regclassutf8() : regclass()); |
a14b48bc |
1721 | if (*PL_regcomp_parse != ']') |
1722 | FAIL("unmatched [] in regexp"); |
1723 | nextchar(); |
a0d0e21e |
1724 | *flagp |= HASWIDTH|SIMPLE; |
1725 | break; |
1726 | case '(': |
1727 | nextchar(); |
1728 | ret = reg(1, &flags); |
1729 | if (ret == NULL) { |
1730 | if (flags & TRYAGAIN) |
1731 | goto tryagain; |
1732 | return(NULL); |
1733 | } |
c277df42 |
1734 | *flagp |= flags&(HASWIDTH|SPSTART|SIMPLE); |
a0d0e21e |
1735 | break; |
1736 | case '|': |
1737 | case ')': |
1738 | if (flags & TRYAGAIN) { |
1739 | *flagp |= TRYAGAIN; |
1740 | return NULL; |
1741 | } |
3280af22 |
1742 | FAIL2("internal urp in regexp at /%s/", PL_regcomp_parse); |
a0d0e21e |
1743 | /* Supposed to be caught earlier. */ |
1744 | break; |
85afd4ae |
1745 | case '{': |
3280af22 |
1746 | if (!regcurly(PL_regcomp_parse)) { |
1747 | PL_regcomp_parse++; |
85afd4ae |
1748 | goto defchar; |
1749 | } |
1750 | /* FALL THROUGH */ |
a0d0e21e |
1751 | case '?': |
1752 | case '+': |
1753 | case '*': |
3115e423 |
1754 | FAIL("?+*{} follows nothing in regexp"); |
a0d0e21e |
1755 | break; |
1756 | case '\\': |
3280af22 |
1757 | switch (*++PL_regcomp_parse) { |
a0d0e21e |
1758 | case 'A': |
3280af22 |
1759 | PL_seen_zerolen++; |
c277df42 |
1760 | ret = reg_node(SBOL); |
a0d0e21e |
1761 | *flagp |= SIMPLE; |
1762 | nextchar(); |
1763 | break; |
1764 | case 'G': |
c277df42 |
1765 | ret = reg_node(GPOS); |
3280af22 |
1766 | PL_regseen |= REG_SEEN_GPOS; |
a0d0e21e |
1767 | *flagp |= SIMPLE; |
1768 | nextchar(); |
1769 | break; |
1770 | case 'Z': |
c277df42 |
1771 | ret = reg_node(SEOL); |
a0d0e21e |
1772 | *flagp |= SIMPLE; |
1773 | nextchar(); |
1774 | break; |
b85d18e9 |
1775 | case 'z': |
1776 | ret = reg_node(EOS); |
1777 | *flagp |= SIMPLE; |
3280af22 |
1778 | PL_seen_zerolen++; /* Do not optimize RE away */ |
b85d18e9 |
1779 | nextchar(); |
1780 | break; |
4a2d328f |
1781 | case 'C': |
a0ed51b3 |
1782 | ret = reg_node(SANY); |
1783 | *flagp |= HASWIDTH|SIMPLE; |
1784 | nextchar(); |
1785 | break; |
1786 | case 'X': |
1787 | ret = reg_node(CLUMP); |
1788 | *flagp |= HASWIDTH; |
1789 | nextchar(); |
1790 | if (UTF && !PL_utf8_mark) |
dfe13c55 |
1791 | is_utf8_mark((U8*)"~"); /* preload table */ |
a0ed51b3 |
1792 | break; |
a0d0e21e |
1793 | case 'w': |
a0ed51b3 |
1794 | ret = reg_node( |
1795 | UTF |
1796 | ? (LOC ? ALNUMLUTF8 : ALNUMUTF8) |
1797 | : (LOC ? ALNUML : ALNUM)); |
a0d0e21e |
1798 | *flagp |= HASWIDTH|SIMPLE; |
1799 | nextchar(); |
a0ed51b3 |
1800 | if (UTF && !PL_utf8_alnum) |
dfe13c55 |
1801 | is_utf8_alnum((U8*)"a"); /* preload table */ |
a0d0e21e |
1802 | break; |
1803 | case 'W': |
a0ed51b3 |
1804 | ret = reg_node( |
1805 | UTF |
1806 | ? (LOC ? NALNUMLUTF8 : NALNUMUTF8) |
1807 | : (LOC ? NALNUML : NALNUM)); |
a0d0e21e |
1808 | *flagp |= HASWIDTH|SIMPLE; |
1809 | nextchar(); |
a0ed51b3 |
1810 | if (UTF && !PL_utf8_alnum) |
dfe13c55 |
1811 | is_utf8_alnum((U8*)"a"); /* preload table */ |
a0d0e21e |
1812 | break; |
1813 | case 'b': |
3280af22 |
1814 | PL_seen_zerolen++; |
f5c9036e |
1815 | PL_regseen |= REG_SEEN_LOOKBEHIND; |
a0ed51b3 |
1816 | ret = reg_node( |
1817 | UTF |
1818 | ? (LOC ? BOUNDLUTF8 : BOUNDUTF8) |
1819 | : (LOC ? BOUNDL : BOUND)); |
a0d0e21e |
1820 | *flagp |= SIMPLE; |
1821 | nextchar(); |
a0ed51b3 |
1822 | if (UTF && !PL_utf8_alnum) |
dfe13c55 |
1823 | is_utf8_alnum((U8*)"a"); /* preload table */ |
a0d0e21e |
1824 | break; |
1825 | case 'B': |
3280af22 |
1826 | PL_seen_zerolen++; |
f5c9036e |
1827 | PL_regseen |= REG_SEEN_LOOKBEHIND; |
a0ed51b3 |
1828 | ret = reg_node( |
1829 | UTF |
1830 | ? (LOC ? NBOUNDLUTF8 : NBOUNDUTF8) |
1831 | : (LOC ? NBOUNDL : NBOUND)); |
a0d0e21e |
1832 | *flagp |= SIMPLE; |
1833 | nextchar(); |
a0ed51b3 |
1834 | if (UTF && !PL_utf8_alnum) |
dfe13c55 |
1835 | is_utf8_alnum((U8*)"a"); /* preload table */ |
a0d0e21e |
1836 | break; |
1837 | case 's': |
a0ed51b3 |
1838 | ret = reg_node( |
1839 | UTF |
1840 | ? (LOC ? SPACELUTF8 : SPACEUTF8) |
1841 | : (LOC ? SPACEL : SPACE)); |
a0d0e21e |
1842 | *flagp |= HASWIDTH|SIMPLE; |
1843 | nextchar(); |
a0ed51b3 |
1844 | if (UTF && !PL_utf8_space) |
dfe13c55 |
1845 | is_utf8_space((U8*)" "); /* preload table */ |
a0d0e21e |
1846 | break; |
1847 | case 'S': |
a0ed51b3 |
1848 | ret = reg_node( |
1849 | UTF |
1850 | ? (LOC ? NSPACELUTF8 : NSPACEUTF8) |
1851 | : (LOC ? NSPACEL : NSPACE)); |
a0d0e21e |
1852 | *flagp |= HASWIDTH|SIMPLE; |
1853 | nextchar(); |
a0ed51b3 |
1854 | if (UTF && !PL_utf8_space) |
dfe13c55 |
1855 | is_utf8_space((U8*)" "); /* preload table */ |
a0d0e21e |
1856 | break; |
1857 | case 'd': |
a0ed51b3 |
1858 | ret = reg_node(UTF ? DIGITUTF8 : DIGIT); |
a0d0e21e |
1859 | *flagp |= HASWIDTH|SIMPLE; |
1860 | nextchar(); |
a0ed51b3 |
1861 | if (UTF && !PL_utf8_digit) |
dfe13c55 |
1862 | is_utf8_digit((U8*)"1"); /* preload table */ |
a0d0e21e |
1863 | break; |
1864 | case 'D': |
a0ed51b3 |
1865 | ret = reg_node(UTF ? NDIGITUTF8 : NDIGIT); |
a0d0e21e |
1866 | *flagp |= HASWIDTH|SIMPLE; |
1867 | nextchar(); |
a0ed51b3 |
1868 | if (UTF && !PL_utf8_digit) |
dfe13c55 |
1869 | is_utf8_digit((U8*)"1"); /* preload table */ |
a0d0e21e |
1870 | break; |
a14b48bc |
1871 | case 'p': |
1872 | case 'P': |
1873 | { /* a lovely hack--pretend we saw [\pX] instead */ |
1874 | char* oldregxend = PL_regxend; |
1875 | |
1876 | if (PL_regcomp_parse[1] == '{') { |
1877 | PL_regxend = strchr(PL_regcomp_parse, '}'); |
1878 | if (!PL_regxend) |
1879 | FAIL("Missing right brace on \\p{}"); |
1880 | PL_regxend++; |
1881 | } |
1882 | else |
1883 | PL_regxend = PL_regcomp_parse + 2; |
1884 | PL_regcomp_parse--; |
1885 | |
1886 | ret = regclassutf8(); |
1887 | |
1888 | PL_regxend = oldregxend; |
1889 | PL_regcomp_parse--; |
1890 | nextchar(); |
1891 | *flagp |= HASWIDTH|SIMPLE; |
1892 | } |
1893 | break; |
a0d0e21e |
1894 | case 'n': |
1895 | case 'r': |
1896 | case 't': |
1897 | case 'f': |
1898 | case 'e': |
1899 | case 'a': |
1900 | case 'x': |
1901 | case 'c': |
1902 | case '0': |
1903 | goto defchar; |
1904 | case '1': case '2': case '3': case '4': |
1905 | case '5': case '6': case '7': case '8': case '9': |
1906 | { |
3280af22 |
1907 | I32 num = atoi(PL_regcomp_parse); |
a0d0e21e |
1908 | |
3280af22 |
1909 | if (num > 9 && num >= PL_regnpar) |
a0d0e21e |
1910 | goto defchar; |
1911 | else { |
3280af22 |
1912 | if (!SIZE_ONLY && num > PL_regcomp_rx->nparens) |
ef64f398 |
1913 | FAIL("reference to nonexistent group"); |
3280af22 |
1914 | PL_regsawback = 1; |
a0ed51b3 |
1915 | ret = reganode(FOLD |
1916 | ? (LOC ? REFFL : REFF) |
c8756f30 |
1917 | : REF, num); |
a0d0e21e |
1918 | *flagp |= HASWIDTH; |
3280af22 |
1919 | while (isDIGIT(*PL_regcomp_parse)) |
1920 | PL_regcomp_parse++; |
1921 | PL_regcomp_parse--; |
a0d0e21e |
1922 | nextchar(); |
1923 | } |
1924 | } |
1925 | break; |
1926 | case '\0': |
3280af22 |
1927 | if (PL_regcomp_parse >= PL_regxend) |
a0d0e21e |
1928 | FAIL("trailing \\ in regexp"); |
1929 | /* FALL THROUGH */ |
1930 | default: |
c9f97d15 |
1931 | /* Do not generate `unrecognized' warnings here, we fall |
1932 | back into the quick-grab loop below */ |
a0d0e21e |
1933 | goto defchar; |
1934 | } |
1935 | break; |
4633a7c4 |
1936 | |
1937 | case '#': |
3280af22 |
1938 | if (PL_regflags & PMf_EXTENDED) { |
1939 | while (PL_regcomp_parse < PL_regxend && *PL_regcomp_parse != '\n') PL_regcomp_parse++; |
1940 | if (PL_regcomp_parse < PL_regxend) |
4633a7c4 |
1941 | goto tryagain; |
1942 | } |
1943 | /* FALL THROUGH */ |
1944 | |
a0d0e21e |
1945 | default: { |
1946 | register I32 len; |
a0ed51b3 |
1947 | register UV ender; |
a0d0e21e |
1948 | register char *p; |
c277df42 |
1949 | char *oldp, *s; |
a0d0e21e |
1950 | I32 numlen; |
1951 | |
3280af22 |
1952 | PL_regcomp_parse++; |
a0d0e21e |
1953 | |
1954 | defchar: |
a0ed51b3 |
1955 | ret = reg_node(FOLD |
1956 | ? (LOC ? EXACTFL : EXACTF) |
bbce6d69 |
1957 | : EXACT); |
cd439c50 |
1958 | s = STRING(ret); |
3280af22 |
1959 | for (len = 0, p = PL_regcomp_parse - 1; |
1960 | len < 127 && p < PL_regxend; |
a0d0e21e |
1961 | len++) |
1962 | { |
1963 | oldp = p; |
5b5a24f7 |
1964 | |
3280af22 |
1965 | if (PL_regflags & PMf_EXTENDED) |
1966 | p = regwhite(p, PL_regxend); |
a0d0e21e |
1967 | switch (*p) { |
1968 | case '^': |
1969 | case '$': |
1970 | case '.': |
1971 | case '[': |
1972 | case '(': |
1973 | case ')': |
1974 | case '|': |
1975 | goto loopdone; |
1976 | case '\\': |
1977 | switch (*++p) { |
1978 | case 'A': |
1979 | case 'G': |
1980 | case 'Z': |
b85d18e9 |
1981 | case 'z': |
a0d0e21e |
1982 | case 'w': |
1983 | case 'W': |
1984 | case 'b': |
1985 | case 'B': |
1986 | case 's': |
1987 | case 'S': |
1988 | case 'd': |
1989 | case 'D': |
a14b48bc |
1990 | case 'p': |
1991 | case 'P': |
a0d0e21e |
1992 | --p; |
1993 | goto loopdone; |
1994 | case 'n': |
1995 | ender = '\n'; |
1996 | p++; |
a687059c |
1997 | break; |
a0d0e21e |
1998 | case 'r': |
1999 | ender = '\r'; |
2000 | p++; |
a687059c |
2001 | break; |
a0d0e21e |
2002 | case 't': |
2003 | ender = '\t'; |
2004 | p++; |
a687059c |
2005 | break; |
a0d0e21e |
2006 | case 'f': |
2007 | ender = '\f'; |
2008 | p++; |
a687059c |
2009 | break; |
a0d0e21e |
2010 | case 'e': |
2011 | ender = '\033'; |
2012 | p++; |
a687059c |
2013 | break; |
a0d0e21e |
2014 | case 'a': |
2015 | ender = '\007'; |
2016 | p++; |
a687059c |
2017 | break; |
a0d0e21e |
2018 | case 'x': |
a0ed51b3 |
2019 | if (*++p == '{') { |
2020 | char* e = strchr(p, '}'); |
2021 | |
2022 | if (!e) |
2023 | FAIL("Missing right brace on \\x{}"); |
2024 | else if (UTF) { |
2025 | ender = scan_hex(p + 1, e - p, &numlen); |
2026 | if (numlen + len >= 127) { /* numlen is generous */ |
2027 | p--; |
2028 | goto loopdone; |
2029 | } |
2030 | p = e + 1; |
2031 | } |
2032 | else |
2033 | FAIL("Can't use \\x{} without 'use utf8' declaration"); |
2034 | } |
2035 | else { |
2036 | ender = scan_hex(p, 2, &numlen); |
2037 | p += numlen; |
2038 | } |
a687059c |
2039 | break; |
a0d0e21e |
2040 | case 'c': |
2041 | p++; |
bbce6d69 |
2042 | ender = UCHARAT(p++); |
2043 | ender = toCTRL(ender); |
a687059c |
2044 | break; |
a0d0e21e |
2045 | case '0': case '1': case '2': case '3':case '4': |
2046 | case '5': case '6': case '7': case '8':case '9': |
2047 | if (*p == '0' || |
3280af22 |
2048 | (isDIGIT(p[1]) && atoi(p) >= PL_regnpar) ) { |
a0d0e21e |
2049 | ender = scan_oct(p, 3, &numlen); |
2050 | p += numlen; |
2051 | } |
2052 | else { |
2053 | --p; |
2054 | goto loopdone; |
a687059c |
2055 | } |
2056 | break; |
a0d0e21e |
2057 | case '\0': |
3280af22 |
2058 | if (p >= PL_regxend) |
a687059c |
2059 | FAIL("trailing \\ in regexp"); |
2060 | /* FALL THROUGH */ |
a0d0e21e |
2061 | default: |
c9f97d15 |
2062 | if (!SIZE_ONLY && ckWARN(WARN_UNSAFE) && isALPHA(*p)) |
cea2e8a9 |
2063 | Perl_warner(aTHX_ WARN_UNSAFE, |
c9f97d15 |
2064 | "/%.127s/: Unrecognized escape \\%c passed through", |
2065 | PL_regprecomp, |
2066 | *p); |
a0ed51b3 |
2067 | goto normal_default; |
a0d0e21e |
2068 | } |
2069 | break; |
a687059c |
2070 | default: |
a0ed51b3 |
2071 | normal_default: |
2072 | if ((*p & 0xc0) == 0xc0 && UTF) { |
dfe13c55 |
2073 | ender = utf8_to_uv((U8*)p, &numlen); |
a0ed51b3 |
2074 | p += numlen; |
2075 | } |
2076 | else |
2077 | ender = *p++; |
a0d0e21e |
2078 | break; |
a687059c |
2079 | } |
3280af22 |
2080 | if (PL_regflags & PMf_EXTENDED) |
2081 | p = regwhite(p, PL_regxend); |
a0ed51b3 |
2082 | if (UTF && FOLD) { |
2083 | if (LOC) |
2084 | ender = toLOWER_LC_uni(ender); |
2085 | else |
2086 | ender = toLOWER_uni(ender); |
2087 | } |
a0d0e21e |
2088 | if (ISMULT2(p)) { /* Back off on ?+*. */ |
2089 | if (len) |
2090 | p = oldp; |
a0ed51b3 |
2091 | else if (ender >= 0x80 && UTF) { |
2092 | reguni(ender, s, &numlen); |
2093 | s += numlen; |
2094 | len += numlen; |
2095 | } |
a0d0e21e |
2096 | else { |
2097 | len++; |
cd439c50 |
2098 | REGC(ender, s++); |
a0d0e21e |
2099 | } |
2100 | break; |
a687059c |
2101 | } |
a0ed51b3 |
2102 | if (ender >= 0x80 && UTF) { |
2103 | reguni(ender, s, &numlen); |
2104 | s += numlen; |
2105 | len += numlen - 1; |
2106 | } |
2107 | else |
cd439c50 |
2108 | REGC(ender, s++); |
a0d0e21e |
2109 | } |
2110 | loopdone: |
3280af22 |
2111 | PL_regcomp_parse = p - 1; |
a0d0e21e |
2112 | nextchar(); |
2113 | if (len < 0) |
2114 | FAIL("internal disaster in regexp"); |
2115 | if (len > 0) |
2116 | *flagp |= HASWIDTH; |
2117 | if (len == 1) |
2118 | *flagp |= SIMPLE; |
c277df42 |
2119 | if (!SIZE_ONLY) |
cd439c50 |
2120 | STR_LEN(ret) = len; |
2121 | if (SIZE_ONLY) |
2122 | PL_regsize += STR_SZ(len); |
2123 | else |
2124 | PL_regcode += STR_SZ(len); |
a687059c |
2125 | } |
a0d0e21e |
2126 | break; |
2127 | } |
a687059c |
2128 | |
a0d0e21e |
2129 | return(ret); |
a687059c |
2130 | } |
2131 | |
873ef191 |
2132 | STATIC char * |
cea2e8a9 |
2133 | S_regwhite(pTHX_ char *p, char *e) |
5b5a24f7 |
2134 | { |
2135 | while (p < e) { |
2136 | if (isSPACE(*p)) |
2137 | ++p; |
2138 | else if (*p == '#') { |
2139 | do { |
2140 | p++; |
2141 | } while (p < e && *p != '\n'); |
2142 | } |
2143 | else |
2144 | break; |
2145 | } |
2146 | return p; |
2147 | } |
2148 | |
b8c5462f |
2149 | /* Parse POSIX character classes: [[:foo:]], [[=foo=]], [[.foo.]]. |
2150 | Character classes ([:foo:]) can also be negated ([:^foo:]). |
2151 | Returns a named class id (ANYOF_XXX) if successful, -1 otherwise. |
2152 | Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed, |
2153 | but trigger warnings because they are currently unimplemented. */ |
2154 | STATIC I32 |
cea2e8a9 |
2155 | S_regpposixcc(pTHX_ I32 value) |
620e46c5 |
2156 | { |
11b8faa4 |
2157 | dTHR; |
620e46c5 |
2158 | char *posixcc = 0; |
b8c5462f |
2159 | I32 namedclass = -1; |
620e46c5 |
2160 | |
2161 | if (value == '[' && PL_regcomp_parse + 1 < PL_regxend && |
2162 | /* I smell either [: or [= or [. -- POSIX has been here, right? */ |
2163 | (*PL_regcomp_parse == ':' || |
2164 | *PL_regcomp_parse == '=' || |
2165 | *PL_regcomp_parse == '.')) { |
2166 | char c = *PL_regcomp_parse; |
2167 | char* s = PL_regcomp_parse++; |
2168 | |
2169 | while (PL_regcomp_parse < PL_regxend && *PL_regcomp_parse != c) |
2170 | PL_regcomp_parse++; |
2171 | if (PL_regcomp_parse == PL_regxend) |
2172 | /* Grandfather lone [:, [=, [. */ |
2173 | PL_regcomp_parse = s; |
2174 | else { |
b8c5462f |
2175 | char* t = PL_regcomp_parse++; /* skip over the c */ |
2176 | |
2177 | if (*PL_regcomp_parse == ']') { |
2178 | PL_regcomp_parse++; /* skip over the ending ] */ |
2179 | posixcc = s + 1; |
2180 | if (*s == ':') { |
2181 | I32 complement = *posixcc == '^' ? *posixcc++ : 0; |
2182 | I32 skip = 5; /* the most common skip */ |
2183 | |
2184 | switch (*posixcc) { |
2185 | case 'a': |
2186 | if (strnEQ(posixcc, "alnum", 5)) |
2187 | namedclass = |
2188 | complement ? ANYOF_NALNUMC : ANYOF_ALNUMC; |
2189 | else if (strnEQ(posixcc, "alpha", 5)) |
2190 | namedclass = |
2191 | complement ? ANYOF_NALPHA : ANYOF_ALPHA; |
2192 | else if (strnEQ(posixcc, "ascii", 5)) |
2193 | namedclass = |
2194 | complement ? ANYOF_NASCII : ANYOF_ASCII; |
2195 | break; |
2196 | case 'c': |
2197 | if (strnEQ(posixcc, "cntrl", 5)) |
2198 | namedclass = |
2199 | complement ? ANYOF_NCNTRL : ANYOF_CNTRL; |
2200 | break; |
2201 | case 'd': |
2202 | if (strnEQ(posixcc, "digit", 5)) |
2203 | namedclass = |
2204 | complement ? ANYOF_NDIGIT : ANYOF_DIGIT; |
2205 | break; |
2206 | case 'g': |
2207 | if (strnEQ(posixcc, "graph", 5)) |
2208 | namedclass = |
2209 | complement ? ANYOF_NGRAPH : ANYOF_GRAPH; |
2210 | break; |
2211 | case 'l': |
2212 | if (strnEQ(posixcc, "lower", 5)) |
2213 | namedclass = |
2214 | complement ? ANYOF_NLOWER : ANYOF_LOWER; |
2215 | break; |
2216 | case 'p': |
2217 | if (strnEQ(posixcc, "print", 5)) |
2218 | namedclass = |
2219 | complement ? ANYOF_NPRINT : ANYOF_PRINT; |
2220 | else if (strnEQ(posixcc, "punct", 5)) |
2221 | namedclass = |
2222 | complement ? ANYOF_NPUNCT : ANYOF_PUNCT; |
2223 | break; |
2224 | case 's': |
2225 | if (strnEQ(posixcc, "space", 5)) |
2226 | namedclass = |
2227 | complement ? ANYOF_NSPACE : ANYOF_SPACE; |
2228 | case 'u': |
2229 | if (strnEQ(posixcc, "upper", 5)) |
2230 | namedclass = |
2231 | complement ? ANYOF_NUPPER : ANYOF_UPPER; |
2232 | break; |
2233 | case 'w': /* this is not POSIX, this is the Perl \w */ |
2234 | if (strnEQ(posixcc, "word", 4)) { |
2235 | namedclass = |
2236 | complement ? ANYOF_NALNUM : ANYOF_ALNUM; |
2237 | skip = 4; |
2238 | } |
2239 | break; |
2240 | case 'x': |
2241 | if (strnEQ(posixcc, "xdigit", 6)) { |
2242 | namedclass = |
2243 | complement ? ANYOF_NXDIGIT : ANYOF_XDIGIT; |
2244 | skip = 6; |
2245 | } |
2246 | break; |
2247 | } |
93733859 |
2248 | if ((namedclass == OOB_NAMEDCLASS || |
b8c5462f |
2249 | !(posixcc + skip + 2 < PL_regxend && |
2250 | (posixcc[skip] == ':' && |
2251 | posixcc[skip + 1] == ']')))) |
2252 | Perl_croak(aTHX_ "Character class [:%.*s:] unknown", |
2253 | t - s - 1, s + 1); |
2254 | } else if (ckWARN(WARN_UNSAFE) && !SIZE_ONLY) |
2255 | /* [[=foo=]] and [[.foo.]] are still future. */ |
cea2e8a9 |
2256 | Perl_warner(aTHX_ WARN_UNSAFE, |
b8c5462f |
2257 | "Character class syntax [%c %c] is reserved for future extensions", c, c); |
2258 | } else { |
2259 | /* Maternal grandfather: |
2260 | * "[:" ending in ":" but not in ":]" */ |
767d463e |
2261 | PL_regcomp_parse = s; |
2262 | } |
620e46c5 |
2263 | } |
2264 | } |
2265 | |
b8c5462f |
2266 | return namedclass; |
2267 | } |
2268 | |
2269 | STATIC void |
2270 | S_checkposixcc(pTHX) |
2271 | { |
2272 | if (ckWARN(WARN_UNSAFE) && !SIZE_ONLY && |
2273 | (*PL_regcomp_parse == ':' || |
2274 | *PL_regcomp_parse == '=' || |
2275 | *PL_regcomp_parse == '.')) { |
2276 | char *s = PL_regcomp_parse; |
93733859 |
2277 | char c = *s++; |
b8c5462f |
2278 | |
2279 | while(*s && isALNUM(*s)) |
2280 | s++; |
2281 | if (*s && c == *s && s[1] == ']') { |
2282 | Perl_warner(aTHX_ WARN_UNSAFE, |
2283 | "Character class syntax [%c %c] belongs inside character classes", c, c); |
2284 | if (c == '=' || c == '.') |
2285 | Perl_warner(aTHX_ WARN_UNSAFE, |
2286 | "Character class syntax [%c %c] is reserved for future extensions", c, c); |
2287 | } |
2288 | } |
620e46c5 |
2289 | } |
2290 | |
76e3520e |
2291 | STATIC regnode * |
cea2e8a9 |
2292 | S_regclass(pTHX) |
a687059c |
2293 | { |
5c0ca799 |
2294 | dTHR; |
c277df42 |
2295 | register char *opnd, *s; |
a0ed51b3 |
2296 | register I32 value; |
b8c5462f |
2297 | register I32 lastvalue = OOB_CHAR8; |
a0d0e21e |
2298 | register I32 range = 0; |
c277df42 |
2299 | register regnode *ret; |
a0d0e21e |
2300 | register I32 def; |
2301 | I32 numlen; |
b8c5462f |
2302 | I32 namedclass; |
a0d0e21e |
2303 | |
cd439c50 |
2304 | s = opnd = MASK(PL_regcode); |
c277df42 |
2305 | ret = reg_node(ANYOF); |
b8c5462f |
2306 | for (value = 0; value < ANYOF_SIZE; value++) |
cd439c50 |
2307 | REGC(0, s++); |
3280af22 |
2308 | if (*PL_regcomp_parse == '^') { /* Complement of range. */ |
2309 | PL_regnaughty++; |
2310 | PL_regcomp_parse++; |
c277df42 |
2311 | if (!SIZE_ONLY) |
b8c5462f |
2312 | ANYOF_FLAGS(opnd) |= ANYOF_INVERT; |
bbce6d69 |
2313 | } |
c277df42 |
2314 | if (!SIZE_ONLY) { |
3280af22 |
2315 | PL_regcode += ANY_SKIP; |
a0ed51b3 |
2316 | if (FOLD) |
b8c5462f |
2317 | ANYOF_FLAGS(opnd) |= ANYOF_FOLD; |
a0ed51b3 |
2318 | if (LOC) |
b8c5462f |
2319 | ANYOF_FLAGS(opnd) |= ANYOF_LOCALE; |
a0ed51b3 |
2320 | } |
2321 | else { |
3280af22 |
2322 | PL_regsize += ANY_SKIP; |
a0d0e21e |
2323 | } |
b8c5462f |
2324 | |
2325 | checkposixcc(); |
2326 | |
3280af22 |
2327 | if (*PL_regcomp_parse == ']' || *PL_regcomp_parse == '-') |
a0d0e21e |
2328 | goto skipcond; /* allow 1st char to be ] or - */ |
3280af22 |
2329 | while (PL_regcomp_parse < PL_regxend && *PL_regcomp_parse != ']') { |
a0d0e21e |
2330 | skipcond: |
93733859 |
2331 | namedclass = OOB_NAMEDCLASS; |
a0ed51b3 |
2332 | value = UCHARAT(PL_regcomp_parse++); |
620e46c5 |
2333 | if (value == '[') |
b8c5462f |
2334 | namedclass = regpposixcc(value); |
620e46c5 |
2335 | else if (value == '\\') { |
a0ed51b3 |
2336 | value = UCHARAT(PL_regcomp_parse++); |
2337 | switch (value) { |
b8c5462f |
2338 | case 'w': namedclass = ANYOF_ALNUM; break; |
2339 | case 'W': namedclass = ANYOF_NALNUM; break; |
2340 | case 's': namedclass = ANYOF_SPACE; break; |
2341 | case 'S': namedclass = ANYOF_NSPACE; break; |
2342 | case 'd': namedclass = ANYOF_DIGIT; break; |
2343 | case 'D': namedclass = ANYOF_NDIGIT; break; |
2344 | case 'n': value = '\n'; break; |
2345 | case 'r': value = '\r'; break; |
2346 | case 't': value = '\t'; break; |
2347 | case 'f': value = '\f'; break; |
2348 | case 'b': value = '\b'; break; |
2349 | case 'e': value = '\033'; break; |
2350 | case 'a': value = '\007'; break; |
2351 | case 'x': |
2352 | value = scan_hex(PL_regcomp_parse, 2, &numlen); |
2353 | PL_regcomp_parse += numlen; |
2354 | break; |
2355 | case 'c': |
2356 | value = UCHARAT(PL_regcomp_parse++); |
2357 | value = toCTRL(value); |
2358 | break; |
2359 | case '0': case '1': case '2': case '3': case '4': |
2360 | case '5': case '6': case '7': case '8': case '9': |
2361 | value = scan_oct(--PL_regcomp_parse, 3, &numlen); |
2362 | PL_regcomp_parse += numlen; |
2363 | break; |
2364 | } |
2365 | } |
93733859 |
2366 | if (!SIZE_ONLY && namedclass > OOB_NAMEDCLASS) { |
1209ba90 |
2367 | if (range) { |
2368 | ANYOF_BITMAP_SET(opnd, lastvalue); |
2369 | ANYOF_BITMAP_SET(opnd, '-'); |
2370 | } |
b8c5462f |
2371 | switch (namedclass) { |
2372 | case ANYOF_ALNUM: |
2373 | if (LOC) |
2374 | ANYOF_CLASS_SET(opnd, ANYOF_ALNUM); |
2375 | else { |
2376 | for (value = 0; value < 256; value++) |
2377 | if (isALNUM(value)) |
2378 | ANYOF_BITMAP_SET(opnd, value); |
bbce6d69 |
2379 | } |
b8c5462f |
2380 | break; |
2381 | case ANYOF_NALNUM: |
2382 | if (LOC) |
2383 | ANYOF_CLASS_SET(opnd, ANYOF_NALNUM); |
2384 | else { |
2385 | for (value = 0; value < 256; value++) |
2386 | if (!isALNUM(value)) |
2387 | ANYOF_BITMAP_SET(opnd, value); |
bbce6d69 |
2388 | } |
b8c5462f |
2389 | break; |
2390 | case ANYOF_SPACE: |
2391 | if (LOC) |
2392 | ANYOF_CLASS_SET(opnd, ANYOF_SPACE); |
2393 | else { |
2394 | for (value = 0; value < 256; value++) |
2395 | if (isSPACE(value)) |
2396 | ANYOF_BITMAP_SET(opnd, value); |
bbce6d69 |
2397 | } |
b8c5462f |
2398 | break; |
2399 | case ANYOF_NSPACE: |
2400 | if (LOC) |
2401 | ANYOF_CLASS_SET(opnd, ANYOF_NSPACE); |
2402 | else { |
2403 | for (value = 0; value < 256; value++) |
2404 | if (!isSPACE(value)) |
2405 | ANYOF_BITMAP_SET(opnd, value); |
bbce6d69 |
2406 | } |
b8c5462f |
2407 | break; |
2408 | case ANYOF_DIGIT: |
2409 | if (LOC) |
2410 | ANYOF_CLASS_SET(opnd, ANYOF_DIGIT); |
2411 | else { |
a0ed51b3 |
2412 | for (value = '0'; value <= '9'; value++) |
b8c5462f |
2413 | ANYOF_BITMAP_SET(opnd, value); |
ae5c130c |
2414 | } |
b8c5462f |
2415 | break; |
2416 | case ANYOF_NDIGIT: |
2417 | if (LOC) |
2418 | ANYOF_CLASS_SET(opnd, ANYOF_NDIGIT); |
2419 | else { |
a0ed51b3 |
2420 | for (value = 0; value < '0'; value++) |
b8c5462f |
2421 | ANYOF_BITMAP_SET(opnd, value); |
a0ed51b3 |
2422 | for (value = '9' + 1; value < 256; value++) |
b8c5462f |
2423 | ANYOF_BITMAP_SET(opnd, value); |
2424 | } |
2425 | break; |
2426 | case ANYOF_NALNUMC: |
2427 | if (LOC) |
2428 | ANYOF_CLASS_SET(opnd, ANYOF_NALNUMC); |
2429 | else { |
2430 | for (value = 0; value < 256; value++) |
2431 | if (!isALNUMC(value)) |
2432 | ANYOF_BITMAP_SET(opnd, value); |
2433 | } |
2434 | break; |
2435 | case ANYOF_ALNUMC: |
2436 | if (LOC) |
2437 | ANYOF_CLASS_SET(opnd, ANYOF_ALNUMC); |
2438 | else { |
2439 | for (value = 0; value < 256; value++) |
2440 | if (isALNUMC(value)) |
2441 | ANYOF_BITMAP_SET(opnd, value); |
2442 | } |
2443 | break; |
2444 | case ANYOF_ALPHA: |
2445 | if (LOC) |
2446 | ANYOF_CLASS_SET(opnd, ANYOF_ALPHA); |
2447 | else { |
2448 | for (value = 0; value < 256; value++) |
2449 | if (isALPHA(value)) |
2450 | ANYOF_BITMAP_SET(opnd, value); |
ae5c130c |
2451 | } |
a0d0e21e |
2452 | break; |
b8c5462f |
2453 | case ANYOF_NALPHA: |
2454 | if (LOC) |
2455 | ANYOF_CLASS_SET(opnd, ANYOF_NALPHA); |
2456 | else { |
2457 | for (value = 0; value < 256; value++) |
2458 | if (!isALPHA(value)) |
2459 | ANYOF_BITMAP_SET(opnd, value); |
2460 | } |
a0d0e21e |
2461 | break; |
b8c5462f |
2462 | case ANYOF_ASCII: |
2463 | if (LOC) |
2464 | ANYOF_CLASS_SET(opnd, ANYOF_ASCII); |
2465 | else { |
2466 | for (value = 0; value < 128; value++) |
2467 | ANYOF_BITMAP_SET(opnd, value); |
2468 | } |
a0d0e21e |
2469 | break; |
b8c5462f |
2470 | case ANYOF_NASCII: |
2471 | if (LOC) |
2472 | ANYOF_CLASS_SET(opnd, ANYOF_NASCII); |
2473 | else { |
2474 | for (value = 128; value < 256; value++) |
2475 | ANYOF_BITMAP_SET(opnd, value); |
2476 | } |
a0d0e21e |
2477 | break; |
b8c5462f |
2478 | case ANYOF_CNTRL: |
2479 | if (LOC) |
2480 | ANYOF_CLASS_SET(opnd, ANYOF_CNTRL); |
2481 | else { |
2482 | for (value = 0; value < 256; value++) |
2483 | if (isCNTRL(value)) |
2484 | ANYOF_BITMAP_SET(opnd, value); |
2485 | } |
2486 | lastvalue = OOB_CHAR8; |
a0d0e21e |
2487 | break; |
b8c5462f |
2488 | case ANYOF_NCNTRL: |
2489 | if (LOC) |
2490 | ANYOF_CLASS_SET(opnd, ANYOF_NCNTRL); |
2491 | else { |
2492 | for (value = 0; value < 256; value++) |
2493 | if (!isCNTRL(value)) |
2494 | ANYOF_BITMAP_SET(opnd, value); |
2495 | } |
a0d0e21e |
2496 | break; |
b8c5462f |
2497 | case ANYOF_GRAPH: |
2498 | if (LOC) |
2499 | ANYOF_CLASS_SET(opnd, ANYOF_GRAPH); |
2500 | else { |
2501 | for (value = 0; value < 256; value++) |
2502 | if (isGRAPH(value)) |
2503 | ANYOF_BITMAP_SET(opnd, value); |
2504 | } |
a0d0e21e |
2505 | break; |
b8c5462f |
2506 | case ANYOF_NGRAPH: |
2507 | if (LOC) |
2508 | ANYOF_CLASS_SET(opnd, ANYOF_NGRAPH); |
2509 | else { |
2510 | for (value = 0; value < 256; value++) |
2511 | if (!isGRAPH(value)) |
2512 | ANYOF_BITMAP_SET(opnd, value); |
2513 | } |
a0d0e21e |
2514 | break; |
b8c5462f |
2515 | case ANYOF_LOWER: |
2516 | if (LOC) |
2517 | ANYOF_CLASS_SET(opnd, ANYOF_LOWER); |
2518 | else { |
2519 | for (value = 0; value < 256; value++) |
2520 | if (isLOWER(value)) |
2521 | ANYOF_BITMAP_SET(opnd, value); |
2522 | } |
a0d0e21e |
2523 | break; |
b8c5462f |
2524 | case ANYOF_NLOWER: |
2525 | if (LOC) |
2526 | ANYOF_CLASS_SET(opnd, ANYOF_NLOWER); |
2527 | else { |
2528 | for (value = 0; value < 256; value++) |
2529 | if (!isLOWER(value)) |
2530 | ANYOF_BITMAP_SET(opnd, value); |
2531 | } |
2532 | break; |
2533 | case ANYOF_PRINT: |
2534 | if (LOC) |
2535 | ANYOF_CLASS_SET(opnd, ANYOF_PRINT); |
2536 | else { |
2537 | for (value = 0; value < 256; value++) |
2538 | if (isPRINT(value)) |
2539 | ANYOF_BITMAP_SET(opnd, value); |
2540 | } |
2541 | break; |
2542 | case ANYOF_NPRINT: |
2543 | if (LOC) |
2544 | ANYOF_CLASS_SET(opnd, ANYOF_NPRINT); |
2545 | else { |
2546 | for (value = 0; value < 256; value++) |
2547 | if (!isPRINT(value)) |
2548 | ANYOF_BITMAP_SET(opnd, value); |
2549 | } |
2550 | break; |
2551 | case ANYOF_PUNCT: |
2552 | if (LOC) |
2553 | ANYOF_CLASS_SET(opnd, ANYOF_PUNCT); |
2554 | else { |
2555 | for (value = 0; value < 256; value++) |
2556 | if (isPUNCT(value)) |
2557 | ANYOF_BITMAP_SET(opnd, value); |
2558 | } |
2559 | break; |
2560 | case ANYOF_NPUNCT: |
2561 | if (LOC) |
2562 | ANYOF_CLASS_SET(opnd, ANYOF_NPUNCT); |
2563 | else { |
2564 | for (value = 0; value < 256; value++) |
2565 | if (!isPUNCT(value)) |
2566 | ANYOF_BITMAP_SET(opnd, value); |
2567 | } |
2568 | break; |
2569 | case ANYOF_UPPER: |
2570 | if (LOC) |
2571 | ANYOF_CLASS_SET(opnd, ANYOF_UPPER); |
2572 | else { |
2573 | for (value = 0; value < 256; value++) |
2574 | if (isUPPER(value)) |
2575 | ANYOF_BITMAP_SET(opnd, value); |
2576 | } |
2577 | break; |
2578 | case ANYOF_NUPPER: |
2579 | if (LOC) |
2580 | ANYOF_CLASS_SET(opnd, ANYOF_NUPPER); |
2581 | else { |
2582 | for (value = 0; value < 256; value++) |
2583 | if (!isUPPER(value)) |
2584 | ANYOF_BITMAP_SET(opnd, value); |
2585 | } |
2586 | break; |
2587 | case ANYOF_XDIGIT: |
2588 | if (LOC) |
2589 | ANYOF_CLASS_SET(opnd, ANYOF_XDIGIT); |
2590 | else { |
2591 | for (value = 0; value < 256; value++) |
2592 | if (isXDIGIT(value)) |
2593 | ANYOF_BITMAP_SET(opnd, value); |
2594 | } |
2595 | break; |
2596 | case ANYOF_NXDIGIT: |
2597 | if (LOC) |
2598 | ANYOF_CLASS_SET(opnd, ANYOF_NXDIGIT); |
2599 | else { |
2600 | for (value = 0; value < 256; value++) |
2601 | if (!isXDIGIT(value)) |
2602 | ANYOF_BITMAP_SET(opnd, value); |
2603 | } |
2604 | break; |
2605 | default: |
2606 | FAIL("invalid [::] class in regexp"); |
a0d0e21e |
2607 | break; |
2608 | } |
b8c5462f |
2609 | if (LOC) |
2610 | ANYOF_FLAGS(opnd) |= ANYOF_CLASS; |
93733859 |
2611 | continue; |
a0d0e21e |
2612 | } |
1209ba90 |
2613 | if (range && namedclass > OOB_NAMEDCLASS) |
2614 | range = 0; /* [a-\d], [a-[:digit:]], not a true range. */ |
a0d0e21e |
2615 | if (range) { |
a0ed51b3 |
2616 | if (lastvalue > value) |
93733859 |
2617 | FAIL("invalid [] range in regexp"); /* [b-a] */ |
a0d0e21e |
2618 | range = 0; |
2619 | } |
2620 | else { |
a0ed51b3 |
2621 | lastvalue = value; |
3280af22 |
2622 | if (*PL_regcomp_parse == '-' && PL_regcomp_parse+1 < PL_regxend && |
93733859 |
2623 | PL_regcomp_parse[1] != ']') { |
3280af22 |
2624 | PL_regcomp_parse++; |
a0d0e21e |
2625 | range = 1; |
2626 | continue; /* do it next time */ |
2627 | } |
a687059c |
2628 | } |
93733859 |
2629 | /* now is the next time */ |
ae5c130c |
2630 | if (!SIZE_ONLY) { |
93733859 |
2631 | #ifndef ASCIIish /* EBCDIC, for example. */ |
8ada0baa |
2632 | if ((isLOWER(lastvalue) && isLOWER(value)) || |
c8dba6f3 |
2633 | (isUPPER(lastvalue) && isUPPER(value))) |
2634 | { |
2635 | I32 i; |
8ada0baa |
2636 | if (isLOWER(lastvalue)) { |
2637 | for (i = lastvalue; i <= value; i++) |
2638 | if (isLOWER(i)) |
b8c5462f |
2639 | ANYOF_BITMAP_SET(opnd, i); |
8ada0baa |
2640 | } else { |
2641 | for (i = lastvalue; i <= value; i++) |
2642 | if (isUPPER(i)) |
b8c5462f |
2643 | ANYOF_BITMAP_SET(opnd, i); |
8ada0baa |
2644 | } |
2645 | } |
2646 | else |
2647 | #endif |
2648 | for ( ; lastvalue <= value; lastvalue++) |
b8c5462f |
2649 | ANYOF_BITMAP_SET(opnd, lastvalue); |
8ada0baa |
2650 | } |
93733859 |
2651 | range = 0; |
a0d0e21e |
2652 | } |
ae5c130c |
2653 | /* optimize case-insensitive simple patterns (e.g. /[a-z]/i) */ |
b8c5462f |
2654 | if (!SIZE_ONLY && |
2655 | (ANYOF_FLAGS(opnd) & (ANYOF_FLAGS_ALL ^ ANYOF_INVERT)) == ANYOF_FOLD) { |
a0ed51b3 |
2656 | for (value = 0; value < 256; ++value) { |
b8c5462f |
2657 | if (ANYOF_BITMAP_TEST(opnd, value)) { |
22c35a8c |
2658 | I32 cf = PL_fold[value]; |
b8c5462f |
2659 | ANYOF_BITMAP_SET(opnd, cf); |
ae5c130c |
2660 | } |
2661 | } |
b8c5462f |
2662 | ANYOF_FLAGS(opnd) &= ~ANYOF_FOLD; |
ae5c130c |
2663 | } |
2664 | /* optimize inverted simple patterns (e.g. [^a-z]) */ |
b8c5462f |
2665 | if (!SIZE_ONLY && (ANYOF_FLAGS(opnd) & ANYOF_FLAGS_ALL) == ANYOF_INVERT) { |
2666 | for (value = 0; value < ANYOF_BITMAP_SIZE; ++value) |
2667 | opnd[ANYOF_BITMAP_OFFSET + value] ^= ANYOF_FLAGS_ALL; |
2668 | ANYOF_FLAGS(opnd) = 0; |
ae5c130c |
2669 | } |
a0d0e21e |
2670 | return ret; |
2671 | } |
2672 | |
a0ed51b3 |
2673 | STATIC regnode * |
cea2e8a9 |
2674 | S_regclassutf8(pTHX) |
a0ed51b3 |
2675 | { |
b8c5462f |
2676 | dTHR; |
a0ed51b3 |
2677 | register char *opnd, *e; |
2678 | register U32 value; |
b8c5462f |
2679 | register U32 lastvalue = OOB_UTF8; |
a0ed51b3 |
2680 | register I32 range = 0; |
2681 | register regnode *ret; |
2682 | I32 numlen; |
2683 | I32 n; |
2684 | SV *listsv; |
2685 | U8 flags = 0; |
b8c5462f |
2686 | I32 namedclass; |
a0ed51b3 |
2687 | |
2688 | if (*PL_regcomp_parse == '^') { /* Complement of range. */ |
2689 | PL_regnaughty++; |
2690 | PL_regcomp_parse++; |
2691 | if (!SIZE_ONLY) |
2692 | flags |= ANYOF_INVERT; |
2693 | } |
2694 | if (!SIZE_ONLY) { |
2695 | if (FOLD) |
2696 | flags |= ANYOF_FOLD; |
2697 | if (LOC) |
2698 | flags |= ANYOF_LOCALE; |
79cb57f6 |
2699 | listsv = newSVpvn("# comment\n",10); |
a0ed51b3 |
2700 | } |
2701 | |
b8c5462f |
2702 | checkposixcc(); |
2703 | |
a0ed51b3 |
2704 | if (*PL_regcomp_parse == ']' || *PL_regcomp_parse == '-') |
2705 | goto skipcond; /* allow 1st char to be ] or - */ |
2706 | |
2707 | while (PL_regcomp_parse < PL_regxend && *PL_regcomp_parse != ']') { |
2708 | skipcond: |
93733859 |
2709 | namedclass = OOB_NAMEDCLASS; |
dfe13c55 |
2710 | value = utf8_to_uv((U8*)PL_regcomp_parse, &numlen); |
a0ed51b3 |
2711 | PL_regcomp_parse += numlen; |
2712 | |
620e46c5 |
2713 | if (value == '[') |
b8c5462f |
2714 | namedclass = regpposixcc(value); |
620e46c5 |
2715 | else if (value == '\\') { |
dfe13c55 |
2716 | value = utf8_to_uv((U8*)PL_regcomp_parse, &numlen); |
a0ed51b3 |
2717 | PL_regcomp_parse += numlen; |
2718 | switch (value) { |
b8c5462f |
2719 | case 'w': namedclass = ANYOF_ALNUM; break; |
2720 | case 'W': namedclass = ANYOF_NALNUM; break; |
2721 | case 's': namedclass = ANYOF_SPACE; break; |
2722 | case 'S': namedclass = ANYOF_NSPACE; break; |
2723 | case 'd': namedclass = ANYOF_DIGIT; break; |
2724 | case 'D': namedclass = ANYOF_NDIGIT; break; |
a0ed51b3 |
2725 | case 'p': |
2726 | case 'P': |
2727 | if (*PL_regcomp_parse == '{') { |
2728 | e = strchr(PL_regcomp_parse++, '}'); |
2729 | if (!e) |
2730 | FAIL("Missing right brace on \\p{}"); |
2731 | n = e - PL_regcomp_parse; |
2732 | } |
2733 | else { |
2734 | e = PL_regcomp_parse; |
2735 | n = 1; |
2736 | } |
2737 | if (!SIZE_ONLY) { |
2738 | if (value == 'p') |
b8c5462f |
2739 | Perl_sv_catpvf(aTHX_ listsv, |
2740 | "+utf8::%.*s\n", n, PL_regcomp_parse); |
a0ed51b3 |
2741 | else |
cea2e8a9 |
2742 | Perl_sv_catpvf(aTHX_ listsv, |
b8c5462f |
2743 | "!utf8::%.*s\n", n, PL_regcomp_parse); |
a0ed51b3 |
2744 | } |
2745 | PL_regcomp_parse = e + 1; |
b8c5462f |
2746 | lastvalue = OOB_UTF8; |
a0ed51b3 |
2747 | continue; |
b8c5462f |
2748 | case 'n': value = '\n'; break; |
2749 | case 'r': value = '\r'; break; |
2750 | case 't': value = '\t'; break; |
2751 | case 'f': value = '\f'; break; |
2752 | case 'b': value = '\b'; break; |
2753 | case 'e': value = '\033'; break; |
2754 | case 'a': value = '\007'; break; |
a0ed51b3 |
2755 | case 'x': |
2756 | if (*PL_regcomp_parse == '{') { |
2757 | e = strchr(PL_regcomp_parse++, '}'); |
2758 | if (!e) |
2759 | FAIL("Missing right brace on \\x{}"); |
b8c5462f |
2760 | value = scan_hex(PL_regcomp_parse, |
2761 | e - PL_regcomp_parse, |
2762 | &numlen); |
a0ed51b3 |
2763 | PL_regcomp_parse = e + 1; |
2764 | } |
2765 | else { |
2766 | value = scan_hex(PL_regcomp_parse, 2, &numlen); |
2767 | PL_regcomp_parse += numlen; |
2768 | } |
2769 | break; |
2770 | case 'c': |
2771 | value = UCHARAT(PL_regcomp_parse++); |
2772 | value = toCTRL(value); |
2773 | break; |
2774 | case '0': case '1': case '2': case '3': case '4': |
2775 | case '5': case '6': case '7': case '8': case '9': |
2776 | value = scan_oct(--PL_regcomp_parse, 3, &numlen); |
2777 | PL_regcomp_parse += numlen; |
2778 | break; |
2779 | } |
2780 | } |
93733859 |
2781 | if (!SIZE_ONLY && namedclass > OOB_NAMEDCLASS) { |
1209ba90 |
2782 | if (range) /* [a-\d], [a-[:digit:]] */ |
2783 | Perl_sv_catpvf(aTHX_ listsv, /* 0x002D is Unicode for '-' */ |
2784 | "%04"UVxf"\n%002D\n", (UV)lastvalue); |
2785 | switch (namedclass) { |
b8c5462f |
2786 | case ANYOF_ALNUM: |
2787 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsWord\n"); break; |
2788 | case ANYOF_NALNUM: |
2789 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsWord\n"); break; |
2790 | case ANYOF_ALNUMC: |
2791 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsAlnum\n"); break; |
2792 | case ANYOF_NALNUMC: |
2793 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsAlnum\n"); break; |
2794 | case ANYOF_ALPHA: |
2795 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsAlpha\n"); break; |
2796 | case ANYOF_NALPHA: |
2797 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsAlpha\n"); break; |
2798 | case ANYOF_ASCII: |
2799 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsASCII\n"); break; |
2800 | case ANYOF_NASCII: |
2801 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsASCII\n"); break; |
2802 | case ANYOF_CNTRL: |
2803 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsCntrl\n"); break; |
2804 | case ANYOF_NCNTRL: |
2805 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsCntrl\n"); break; |
2806 | case ANYOF_GRAPH: |
2807 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsGraph\n"); break; |
2808 | case ANYOF_NGRAPH: |
2809 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsGraph\n"); break; |
2810 | case ANYOF_DIGIT: |
2811 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsDigit\n"); break; |
2812 | case ANYOF_NDIGIT: |
2813 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsDigit\n"); break; |
2814 | case ANYOF_LOWER: |
2815 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsLower\n"); break; |
2816 | case ANYOF_NLOWER: |
2817 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsLower\n"); break; |
2818 | case ANYOF_PRINT: |
2819 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsPrint\n"); break; |
2820 | case ANYOF_NPRINT: |
2821 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsPrint\n"); break; |
2822 | case ANYOF_PUNCT: |
2823 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsPunct\n"); break; |
2824 | case ANYOF_NPUNCT: |
2825 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsPunct\n"); break; |
2826 | case ANYOF_SPACE: |
2827 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsSpace\n"); break; |
2828 | case ANYOF_NSPACE: |
2829 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsSpace\n"); break; |
2830 | case ANYOF_UPPER: |
2831 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsUpper\n"); break; |
2832 | case ANYOF_NUPPER: |
2833 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsUpper\n"); break; |
2834 | case ANYOF_XDIGIT: |
2835 | Perl_sv_catpvf(aTHX_ listsv, "+utf8::IsXDigit\n"); break; |
2836 | case ANYOF_NXDIGIT: |
2837 | Perl_sv_catpvf(aTHX_ listsv, "!utf8::IsXDigit\n"); break; |
2838 | } |
93733859 |
2839 | continue; |
b8c5462f |
2840 | } |
1209ba90 |
2841 | if (range && namedclass > OOB_NAMEDCLASS) |
2842 | range = 0; /* [a-\d], [a-[:digit:]], not a true range. */ |
b8c5462f |
2843 | if (range) { |
a0ed51b3 |
2844 | if (lastvalue > value) |
93733859 |
2845 | FAIL("invalid [] range in regexp"); /* [b-a] */ |
b9c39e73 |
2846 | if (!SIZE_ONLY) |
57def98f |
2847 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\t%04"UVxf"\n", (UV)lastvalue, (UV)value); |
a0ed51b3 |
2848 | range = 0; |
2849 | } |
2850 | else { |
2851 | lastvalue = value; |
2852 | if (*PL_regcomp_parse == '-' && PL_regcomp_parse+1 < PL_regxend && |
93733859 |
2853 | PL_regcomp_parse[1] != ']') { |
a0ed51b3 |
2854 | PL_regcomp_parse++; |
2855 | range = 1; |
2856 | continue; /* do it next time */ |
2857 | } |
93733859 |
2858 | } |
2859 | /* now is the next time */ |
93733859 |
2860 | if (!SIZE_ONLY) |
57def98f |
2861 | Perl_sv_catpvf(aTHX_ listsv, "%04"UVxf"\n", (UV)value); |
93733859 |
2862 | range = 0; |
a0ed51b3 |
2863 | } |
a0ed51b3 |
2864 | |
2865 | ret = reganode(ANYOFUTF8, 0); |
2866 | |
2867 | if (!SIZE_ONLY) { |
2868 | SV *rv = swash_init("utf8", "", listsv, 1, 0); |
2869 | SvREFCNT_dec(listsv); |
2870 | n = add_data(1,"s"); |
2871 | PL_regcomp_rx->data->data[n] = (void*)rv; |
2872 | ARG1_SET(ret, flags); |
2873 | ARG2_SET(ret, n); |
2874 | } |
2875 | |
2876 | return ret; |
2877 | } |
2878 | |
76e3520e |
2879 | STATIC char* |
cea2e8a9 |
2880 | S_nextchar(pTHX) |
a0d0e21e |
2881 | { |
5c0ca799 |
2882 | dTHR; |
3280af22 |
2883 | char* retval = PL_regcomp_parse++; |
a0d0e21e |
2884 | |
4633a7c4 |
2885 | for (;;) { |
3280af22 |
2886 | if (*PL_regcomp_parse == '(' && PL_regcomp_parse[1] == '?' && |
2887 | PL_regcomp_parse[2] == '#') { |
2888 | while (*PL_regcomp_parse && *PL_regcomp_parse != ')') |
2889 | PL_regcomp_parse++; |
2890 | PL_regcomp_parse++; |
4633a7c4 |
2891 | continue; |
2892 | } |
3280af22 |
2893 | if (PL_regflags & PMf_EXTENDED) { |
2894 | if (isSPACE(*PL_regcomp_parse)) { |
2895 | PL_regcomp_parse++; |
748a9306 |
2896 | continue; |
2897 | } |
3280af22 |
2898 | else if (*PL_regcomp_parse == '#') { |
2899 | while (*PL_regcomp_parse && *PL_regcomp_parse != '\n') |
2900 | PL_regcomp_parse++; |
2901 | PL_regcomp_parse++; |
748a9306 |
2902 | continue; |
2903 | } |
748a9306 |
2904 | } |
4633a7c4 |
2905 | return retval; |
a0d0e21e |
2906 | } |
a687059c |
2907 | } |
2908 | |
2909 | /* |
c277df42 |
2910 | - reg_node - emit a node |
a0d0e21e |
2911 | */ |
76e3520e |
2912 | STATIC regnode * /* Location. */ |
cea2e8a9 |
2913 | S_reg_node(pTHX_ U8 op) |
a687059c |
2914 | { |
5c0ca799 |
2915 | dTHR; |
c277df42 |
2916 | register regnode *ret; |
2917 | register regnode *ptr; |
a687059c |
2918 | |
3280af22 |
2919 | ret = PL_regcode; |
c277df42 |
2920 | if (SIZE_ONLY) { |
6b88bc9c |
2921 | SIZE_ALIGN(PL_regsize); |
3280af22 |
2922 | PL_regsize += 1; |
a0d0e21e |
2923 | return(ret); |
2924 | } |
a687059c |
2925 | |
c277df42 |
2926 | NODE_ALIGN_FILL(ret); |
a0d0e21e |
2927 | ptr = ret; |
c277df42 |
2928 | FILL_ADVANCE_NODE(ptr, op); |
3280af22 |
2929 | PL_regcode = ptr; |
a687059c |
2930 | |
a0d0e21e |
2931 | return(ret); |
a687059c |
2932 | } |
2933 | |
2934 | /* |
a0d0e21e |
2935 | - reganode - emit a node with an argument |
2936 | */ |
76e3520e |
2937 | STATIC regnode * /* Location. */ |
cea2e8a9 |
2938 | S_reganode(pTHX_ U8 op, U32 arg) |
fe14fcc3 |
2939 | { |
5c0ca799 |
2940 | dTHR; |
c277df42 |
2941 | register regnode *ret; |
2942 | register regnode *ptr; |
fe14fcc3 |
2943 | |
3280af22 |
2944 | ret = PL_regcode; |
c277df42 |
2945 | if (SIZE_ONLY) { |
6b88bc9c |
2946 | SIZE_ALIGN(PL_regsize); |
3280af22 |
2947 | PL_regsize += 2; |
a0d0e21e |
2948 | return(ret); |
2949 | } |
fe14fcc3 |
2950 | |
c277df42 |
2951 | NODE_ALIGN_FILL(ret); |
a0d0e21e |
2952 | ptr = ret; |
c277df42 |
2953 | FILL_ADVANCE_NODE_ARG(ptr, op, arg); |
3280af22 |
2954 | PL_regcode = ptr; |
fe14fcc3 |
2955 | |
a0d0e21e |
2956 | return(ret); |
fe14fcc3 |
2957 | } |
2958 | |
2959 | /* |
cd439c50 |
2960 | - reguni - emit (if appropriate) a Unicode character |
a0ed51b3 |
2961 | */ |
2962 | STATIC void |
cea2e8a9 |
2963 | S_reguni(pTHX_ UV uv, char* s, I32* lenp) |
a0ed51b3 |
2964 | { |
c485e607 |
2965 | dTHR; |
a0ed51b3 |
2966 | if (SIZE_ONLY) { |
dfe13c55 |
2967 | U8 tmpbuf[10]; |
a0ed51b3 |
2968 | *lenp = uv_to_utf8(tmpbuf, uv) - tmpbuf; |
2969 | } |
2970 | else |
dfe13c55 |
2971 | *lenp = uv_to_utf8((U8*)s, uv) - (U8*)s; |
a0ed51b3 |
2972 | |
2973 | } |
2974 | |
2975 | /* |
a0d0e21e |
2976 | - reginsert - insert an operator in front of already-emitted operand |
2977 | * |
2978 | * Means relocating the operand. |
2979 | */ |
76e3520e |
2980 | STATIC void |
cea2e8a9 |
2981 | S_reginsert(pTHX_ U8 op, regnode *opnd) |
a687059c |
2982 | { |
5c0ca799 |
2983 | dTHR; |
c277df42 |
2984 | register regnode *src; |
2985 | register regnode *dst; |
2986 | register regnode *place; |
2987 | register int offset = regarglen[(U8)op]; |
2988 | |
22c35a8c |
2989 | /* (PL_regkind[(U8)op] == CURLY ? EXTRA_STEP_2ARGS : 0); */ |
c277df42 |
2990 | |
2991 | if (SIZE_ONLY) { |
3280af22 |
2992 | PL_regsize += NODE_STEP_REGNODE + offset; |
a0d0e21e |
2993 | return; |
2994 | } |
a687059c |
2995 | |
3280af22 |
2996 | src = PL_regcode; |
2997 | PL_regcode += NODE_STEP_REGNODE + offset; |
2998 | dst = PL_regcode; |
a0d0e21e |
2999 | while (src > opnd) |
c277df42 |
3000 | StructCopy(--src, --dst, regnode); |
a0d0e21e |
3001 | |
3002 | place = opnd; /* Op node, where operand used to be. */ |
c277df42 |
3003 | src = NEXTOPER(place); |
3004 | FILL_ADVANCE_NODE(place, op); |
3005 | Zero(src, offset, regnode); |
a687059c |
3006 | } |
3007 | |
3008 | /* |
c277df42 |
3009 | - regtail - set the next-pointer at the end of a node chain of p to val. |
a0d0e21e |
3010 | */ |
76e3520e |
3011 | STATIC void |
cea2e8a9 |
3012 | S_regtail(pTHX_ regnode *p, regnode *val) |
a687059c |
3013 | { |
5c0ca799 |
3014 | dTHR; |
c277df42 |
3015 | register regnode *scan; |
3016 | register regnode *temp; |
a0d0e21e |
3017 | register I32 offset; |
3018 | |
c277df42 |
3019 | if (SIZE_ONLY) |
a0d0e21e |
3020 | return; |
3021 | |
3022 | /* Find last node. */ |
3023 | scan = p; |
3024 | for (;;) { |
3025 | temp = regnext(scan); |
3026 | if (temp == NULL) |
3027 | break; |
3028 | scan = temp; |
3029 | } |
a687059c |
3030 | |
c277df42 |
3031 | if (reg_off_by_arg[OP(scan)]) { |
3032 | ARG_SET(scan, val - scan); |
a0ed51b3 |
3033 | } |
3034 | else { |
c277df42 |
3035 | NEXT_OFF(scan) = val - scan; |
3036 | } |
a687059c |
3037 | } |
3038 | |
3039 | /* |
a0d0e21e |
3040 | - regoptail - regtail on operand of first argument; nop if operandless |
3041 | */ |
76e3520e |
3042 | STATIC void |
cea2e8a9 |
3043 | S_regoptail(pTHX_ regnode *p, regnode *val) |
a687059c |
3044 | { |
5c0ca799 |
3045 | dTHR; |
a0d0e21e |
3046 | /* "Operandless" and "op != BRANCH" are synonymous in practice. */ |
c277df42 |
3047 | if (p == NULL || SIZE_ONLY) |
3048 | return; |
22c35a8c |
3049 | if (PL_regkind[(U8)OP(p)] == BRANCH) { |
c277df42 |
3050 | regtail(NEXTOPER(p), val); |
a0ed51b3 |
3051 | } |
22c35a8c |
3052 | else if ( PL_regkind[(U8)OP(p)] == BRANCHJ) { |
c277df42 |
3053 | regtail(NEXTOPER(NEXTOPER(p)), val); |
a0ed51b3 |
3054 | } |
3055 | else |
a0d0e21e |
3056 | return; |
a687059c |
3057 | } |
3058 | |
3059 | /* |
3060 | - regcurly - a little FSA that accepts {\d+,?\d*} |
3061 | */ |
79072805 |
3062 | STATIC I32 |
cea2e8a9 |
3063 | S_regcurly(pTHX_ register char *s) |
a687059c |
3064 | { |
3065 | if (*s++ != '{') |
3066 | return FALSE; |
f0fcb552 |
3067 | if (!isDIGIT(*s)) |
a687059c |
3068 | return FALSE; |
f0fcb552 |
3069 | while (isDIGIT(*s)) |
a687059c |
3070 | s++; |
3071 | if (*s == ',') |
3072 | s++; |
f0fcb552 |
3073 | while (isDIGIT(*s)) |
a687059c |
3074 | s++; |
3075 | if (*s != '}') |
3076 | return FALSE; |
3077 | return TRUE; |
3078 | } |
3079 | |
a687059c |
3080 | |
76e3520e |
3081 | STATIC regnode * |
cea2e8a9 |
3082 | S_dumpuntil(pTHX_ regnode *start, regnode *node, regnode *last, SV* sv, I32 l) |
c277df42 |
3083 | { |
35ff7856 |
3084 | #ifdef DEBUGGING |
f248d071 |
3085 | register U8 op = EXACT; /* Arbitrary non-END op. */ |
c277df42 |
3086 | register regnode *next, *onode; |
3087 | |
3088 | while (op != END && (!last || node < last)) { |
3089 | /* While that wasn't END last time... */ |
3090 | |
3091 | NODE_ALIGN(node); |
3092 | op = OP(node); |
3093 | if (op == CLOSE) |
3094 | l--; |
3095 | next = regnext(node); |
3096 | /* Where, what. */ |
3097 | if (OP(node) == OPTIMIZED) |
3098 | goto after_print; |
3099 | regprop(sv, node); |
54dc92de |
3100 | PerlIO_printf(Perl_debug_log, "%4d:%*s%s", node - start, |
c277df42 |
3101 | 2*l + 1, "", SvPVX(sv)); |
3102 | if (next == NULL) /* Next ptr. */ |
3103 | PerlIO_printf(Perl_debug_log, "(0)"); |
3104 | else |
3105 | PerlIO_printf(Perl_debug_log, "(%d)", next - start); |
3106 | (void)PerlIO_putc(Perl_debug_log, '\n'); |
3107 | after_print: |
22c35a8c |
3108 | if (PL_regkind[(U8)op] == BRANCHJ) { |
c277df42 |
3109 | register regnode *nnode = (OP(next) == LONGJMP |
3110 | ? regnext(next) |
3111 | : next); |
3112 | if (last && nnode > last) |
3113 | nnode = last; |
3114 | node = dumpuntil(start, NEXTOPER(NEXTOPER(node)), nnode, sv, l + 1); |
a0ed51b3 |
3115 | } |
22c35a8c |
3116 | else if (PL_regkind[(U8)op] == BRANCH) { |
c277df42 |
3117 | node = dumpuntil(start, NEXTOPER(node), next, sv, l + 1); |
a0ed51b3 |
3118 | } |
3119 | else if ( op == CURLY) { /* `next' might be very big: optimizer */ |
c277df42 |
3120 | node = dumpuntil(start, NEXTOPER(node) + EXTRA_STEP_2ARGS, |
3121 | NEXTOPER(node) + EXTRA_STEP_2ARGS + 1, sv, l + 1); |
a0ed51b3 |
3122 | } |
22c35a8c |
3123 | else if (PL_regkind[(U8)op] == CURLY && op != CURLYX) { |
c277df42 |
3124 | node = dumpuntil(start, NEXTOPER(node) + EXTRA_STEP_2ARGS, |
3125 | next, sv, l + 1); |
a0ed51b3 |
3126 | } |
3127 | else if ( op == PLUS || op == STAR) { |
c277df42 |
3128 | node = dumpuntil(start, NEXTOPER(node), NEXTOPER(node) + 1, sv, l + 1); |
a0ed51b3 |
3129 | } |
3130 | else if (op == ANYOF) { |
c277df42 |
3131 | node = NEXTOPER(node); |
3132 | node += ANY_SKIP; |
a0ed51b3 |
3133 | } |
22c35a8c |
3134 | else if (PL_regkind[(U8)op] == EXACT) { |
c277df42 |
3135 | /* Literal string, where present. */ |
cd439c50 |
3136 | node += NODE_SZ_STR(node) - 1; |
c277df42 |
3137 | node = NEXTOPER(node); |
a0ed51b3 |
3138 | } |
3139 | else { |
c277df42 |
3140 | node = NEXTOPER(node); |
3141 | node += regarglen[(U8)op]; |
3142 | } |
3143 | if (op == CURLYX || op == OPEN) |
3144 | l++; |
3145 | else if (op == WHILEM) |
3146 | l--; |
3147 | } |
17c3b450 |
3148 | #endif /* DEBUGGING */ |
c277df42 |
3149 | return node; |
3150 | } |
3151 | |
a687059c |
3152 | /* |
fd181c75 |
3153 | - regdump - dump a regexp onto Perl_debug_log in vaguely comprehensible form |
a687059c |
3154 | */ |
3155 | void |
864dbfa3 |
3156 | Perl_regdump(pTHX_ regexp *r) |
a687059c |
3157 | { |
35ff7856 |
3158 | #ifdef DEBUGGING |
5c0ca799 |
3159 | dTHR; |
46fc3d4c |
3160 | SV *sv = sv_newmortal(); |
a687059c |
3161 | |
c277df42 |
3162 | (void)dumpuntil(r->program, r->program + 1, NULL, sv, 0); |
a0d0e21e |
3163 | |
3164 | /* Header fields of interest. */ |
c277df42 |
3165 | if (r->anchored_substr) |
2c2d71f5 |
3166 | PerlIO_printf(Perl_debug_log, "anchored `%s%.*s%s'%s at %d ", |
3280af22 |
3167 | PL_colors[0], |
2c2d71f5 |
3168 | SvCUR(r->anchored_substr) - (SvTAIL(r->anchored_substr)!=0), |
c277df42 |
3169 | SvPVX(r->anchored_substr), |
3280af22 |
3170 | PL_colors[1], |
c277df42 |
3171 | SvTAIL(r->anchored_substr) ? "$" : "", |
3172 | r->anchored_offset); |
3173 | if (r->float_substr) |
2c2d71f5 |
3174 | PerlIO_printf(Perl_debug_log, "floating `%s%.*s%s'%s at %d..%u ", |
3280af22 |
3175 | PL_colors[0], |
2c2d71f5 |
3176 | SvCUR(r->float_substr) - (SvTAIL(r->float_substr)!=0), |
3177 | SvPVX(r->float_substr), |
3280af22 |
3178 | PL_colors[1], |
c277df42 |
3179 | SvTAIL(r->float_substr) ? "$" : "", |
3180 | r->float_min_offset, r->float_max_offset); |
3181 | if (r->check_substr) |
3182 | PerlIO_printf(Perl_debug_log, |
3183 | r->check_substr == r->float_substr |
3184 | ? "(checking floating" : "(checking anchored"); |
3185 | if (r->reganch & ROPT_NOSCAN) |
3186 | PerlIO_printf(Perl_debug_log, " noscan"); |
3187 | if (r->reganch & ROPT_CHECK_ALL) |
3188 | PerlIO_printf(Perl_debug_log, " isall"); |
3189 | if (r->check_substr) |
3190 | PerlIO_printf(Perl_debug_log, ") "); |
3191 | |
46fc3d4c |
3192 | if (r->regstclass) { |
3193 | regprop(sv, r->regstclass); |
3194 | PerlIO_printf(Perl_debug_log, "stclass `%s' ", SvPVX(sv)); |
3195 | } |
774d564b |
3196 | if (r->reganch & ROPT_ANCH) { |
3197 | PerlIO_printf(Perl_debug_log, "anchored"); |
3198 | if (r->reganch & ROPT_ANCH_BOL) |
3199 | PerlIO_printf(Perl_debug_log, "(BOL)"); |
c277df42 |
3200 | if (r->reganch & ROPT_ANCH_MBOL) |
3201 | PerlIO_printf(Perl_debug_log, "(MBOL)"); |
cad2e5aa |
3202 | if (r->reganch & ROPT_ANCH_SBOL) |
3203 | PerlIO_printf(Perl_debug_log, "(SBOL)"); |
774d564b |
3204 | if (r->reganch & ROPT_ANCH_GPOS) |
3205 | PerlIO_printf(Perl_debug_log, "(GPOS)"); |
3206 | PerlIO_putc(Perl_debug_log, ' '); |
3207 | } |
c277df42 |
3208 | if (r->reganch & ROPT_GPOS_SEEN) |
3209 | PerlIO_printf(Perl_debug_log, "GPOS "); |
a0d0e21e |
3210 | if (r->reganch & ROPT_SKIP) |
760ac839 |
3211 | PerlIO_printf(Perl_debug_log, "plus "); |
a0d0e21e |
3212 | if (r->reganch & ROPT_IMPLICIT) |
760ac839 |
3213 | PerlIO_printf(Perl_debug_log, "implicit "); |
760ac839 |
3214 | PerlIO_printf(Perl_debug_log, "minlen %ld ", (long) r->minlen); |
ce862d02 |
3215 | if (r->reganch & ROPT_EVAL_SEEN) |
3216 | PerlIO_printf(Perl_debug_log, "with eval "); |
760ac839 |
3217 | PerlIO_printf(Perl_debug_log, "\n"); |
17c3b450 |
3218 | #endif /* DEBUGGING */ |
a687059c |
3219 | } |
3220 | |
3221 | /* |
a0d0e21e |
3222 | - regprop - printable representation of opcode |
3223 | */ |
46fc3d4c |
3224 | void |
864dbfa3 |
3225 | Perl_regprop(pTHX_ SV *sv, regnode *o) |
a687059c |
3226 | { |
35ff7856 |
3227 | #ifdef DEBUGGING |
5c0ca799 |
3228 | dTHR; |
9b155405 |
3229 | register int k; |
a0d0e21e |
3230 | |
54dc92de |
3231 | sv_setpvn(sv, "", 0); |
9b155405 |
3232 | if (OP(o) >= reg_num) /* regnode.type is unsigned */ |
a0d0e21e |
3233 | FAIL("corrupted regexp opcode"); |
9b155405 |
3234 | sv_catpv(sv, (char*)reg_name[OP(o)]); /* Take off const! */ |
3235 | |
3236 | k = PL_regkind[(U8)OP(o)]; |
3237 | |
3238 | if (k == EXACT) |
7821416a |
3239 | Perl_sv_catpvf(aTHX_ sv, " <%s%.*s%s>", PL_colors[0], |
cd439c50 |
3240 | STR_LEN(o), STRING(o), PL_colors[1]); |
9b155405 |
3241 | else if (k == CURLY) { |
3242 | if (OP(o) == CURLYM || OP(o) == CURLYN) |
cea2e8a9 |
3243 | Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* Parenth number */ |
3244 | Perl_sv_catpvf(aTHX_ sv, " {%d,%d}", ARG1(o), ARG2(o)); |
a0d0e21e |
3245 | } |
2c2d71f5 |
3246 | else if (k == WHILEM && o->flags) /* Ordinal/of */ |
3247 | Perl_sv_catpvf(aTHX_ sv, "[%d/%d]", o->flags & 0xf, o->flags>>4); |
9b155405 |
3248 | else if (k == REF || k == OPEN || k == CLOSE || k == GROUPP ) |
cea2e8a9 |
3249 | Perl_sv_catpvf(aTHX_ sv, "%d", ARG(o)); /* Parenth number */ |
9b155405 |
3250 | else if (k == LOGICAL) |
04ebc1ab |
3251 | Perl_sv_catpvf(aTHX_ sv, "[%d]", o->flags); /* 2: embedded, otherwise 1 */ |
9b155405 |
3252 | else if (k == BRANCHJ && (OP(o) == UNLESSM || OP(o) == IFMATCH)) |
cea2e8a9 |
3253 | Perl_sv_catpvf(aTHX_ sv, "[-%d]", o->flags); |
17c3b450 |
3254 | #endif /* DEBUGGING */ |
35ff7856 |
3255 | } |
a687059c |
3256 | |
cad2e5aa |
3257 | SV * |
3258 | Perl_re_intuit_string(pTHX_ regexp *prog) |
3259 | { /* Assume that RE_INTUIT is set */ |
3260 | DEBUG_r( |
3261 | { STRLEN n_a; |
3262 | char *s = SvPV(prog->check_substr,n_a); |
3263 | |
3264 | if (!PL_colorset) reginitcolors(); |
3265 | PerlIO_printf(Perl_debug_log, |
3266 | "%sUsing REx substr:%s `%s%.60s%s%s'\n", |
3267 | PL_colors[4],PL_colors[5],PL_colors[0], |
3268 | s, |
3269 | PL_colors[1], |
3270 | (strlen(s) > 60 ? "..." : "")); |
3271 | } ); |
3272 | |
3273 | return prog->check_substr; |
3274 | } |
3275 | |
2b69d0c2 |
3276 | void |
864dbfa3 |
3277 | Perl_pregfree(pTHX_ struct regexp *r) |
a687059c |
3278 | { |
5c0ca799 |
3279 | dTHR; |
adac82c7 |
3280 | DEBUG_r(if (!PL_colorset) reginitcolors()); |
7821416a |
3281 | |
3282 | if (!r || (--r->refcnt > 0)) |
3283 | return; |
cad2e5aa |
3284 | DEBUG_r(PerlIO_printf(Perl_debug_log, |
3285 | "%sFreeing REx:%s `%s%.60s%s%s'\n", |
3286 | PL_colors[4],PL_colors[5],PL_colors[0], |
3287 | r->precomp, |
3288 | PL_colors[1], |
3289 | (strlen(r->precomp) > 60 ? "..." : ""))); |
3290 | |
c277df42 |
3291 | if (r->precomp) |
a0d0e21e |
3292 | Safefree(r->precomp); |
cf93c79d |
3293 | if (RX_MATCH_COPIED(r)) |
3294 | Safefree(r->subbeg); |
a193d654 |
3295 | if (r->substrs) { |
3296 | if (r->anchored_substr) |
3297 | SvREFCNT_dec(r->anchored_substr); |
3298 | if (r->float_substr) |
3299 | SvREFCNT_dec(r->float_substr); |
2779dcf1 |
3300 | Safefree(r->substrs); |
a193d654 |
3301 | } |
c277df42 |
3302 | if (r->data) { |
3303 | int n = r->data->count; |
dfad63ad |
3304 | AV* new_comppad = NULL; |
3305 | AV* old_comppad; |
3306 | SV** old_curpad; |
3307 | |
c277df42 |
3308 | while (--n >= 0) { |
3309 | switch (r->data->what[n]) { |
3310 | case 's': |
3311 | SvREFCNT_dec((SV*)r->data->data[n]); |
3312 | break; |
dfad63ad |
3313 | case 'p': |
3314 | new_comppad = (AV*)r->data->data[n]; |
3315 | break; |
c277df42 |
3316 | case 'o': |
dfad63ad |
3317 | if (new_comppad == NULL) |
cea2e8a9 |
3318 | Perl_croak(aTHX_ "panic: pregfree comppad"); |
dfad63ad |
3319 | old_comppad = PL_comppad; |
3320 | old_curpad = PL_curpad; |
3321 | PL_comppad = new_comppad; |
3322 | PL_curpad = AvARRAY(new_comppad); |
c277df42 |
3323 | op_free((OP_4tree*)r->data->data[n]); |
dfad63ad |
3324 | PL_comppad = old_comppad; |
3325 | PL_curpad = old_curpad; |
3326 | SvREFCNT_dec((SV*)new_comppad); |
3327 | new_comppad = NULL; |
c277df42 |
3328 | break; |
3329 | case 'n': |
3330 | break; |
3331 | default: |
3332 | FAIL2("panic: regfree data code '%c'", r->data->what[n]); |
3333 | } |
3334 | } |
3335 | Safefree(r->data->what); |
3336 | Safefree(r->data); |
a0d0e21e |
3337 | } |
3338 | Safefree(r->startp); |
3339 | Safefree(r->endp); |
3340 | Safefree(r); |
a687059c |
3341 | } |
c277df42 |
3342 | |
3343 | /* |
3344 | - regnext - dig the "next" pointer out of a node |
3345 | * |
3346 | * [Note, when REGALIGN is defined there are two places in regmatch() |
3347 | * that bypass this code for speed.] |
3348 | */ |
3349 | regnode * |
864dbfa3 |
3350 | Perl_regnext(pTHX_ register regnode *p) |
c277df42 |
3351 | { |
5c0ca799 |
3352 | dTHR; |
c277df42 |
3353 | register I32 offset; |
3354 | |
3280af22 |
3355 | if (p == &PL_regdummy) |
c277df42 |
3356 | return(NULL); |
3357 | |
3358 | offset = (reg_off_by_arg[OP(p)] ? ARG(p) : NEXT_OFF(p)); |
3359 | if (offset == 0) |
3360 | return(NULL); |
3361 | |
c277df42 |
3362 | return(p+offset); |
c277df42 |
3363 | } |
3364 | |
01f988be |
3365 | STATIC void |
cea2e8a9 |
3366 | S_re_croak2(pTHX_ const char* pat1,const char* pat2,...) |
c277df42 |
3367 | { |
3368 | va_list args; |
3369 | STRLEN l1 = strlen(pat1); |
3370 | STRLEN l2 = strlen(pat2); |
3371 | char buf[512]; |
06bf62c7 |
3372 | SV *msv; |
c277df42 |
3373 | char *message; |
3374 | |
3375 | if (l1 > 510) |
3376 | l1 = 510; |
3377 | if (l1 + l2 > 510) |
3378 | l2 = 510 - l1; |
3379 | Copy(pat1, buf, l1 , char); |
3380 | Copy(pat2, buf + l1, l2 , char); |
3b818b81 |
3381 | buf[l1 + l2] = '\n'; |
3382 | buf[l1 + l2 + 1] = '\0'; |
8736538c |
3383 | #ifdef I_STDARG |
3384 | /* ANSI variant takes additional second argument */ |
c277df42 |
3385 | va_start(args, pat2); |
8736538c |
3386 | #else |
3387 | va_start(args); |
3388 | #endif |
5a844595 |
3389 | msv = vmess(buf, &args); |
c277df42 |
3390 | va_end(args); |
06bf62c7 |
3391 | message = SvPV(msv,l1); |
c277df42 |
3392 | if (l1 > 512) |
3393 | l1 = 512; |
3394 | Copy(message, buf, l1 , char); |
3395 | buf[l1] = '\0'; /* Overwrite \n */ |
cea2e8a9 |
3396 | Perl_croak(aTHX_ "%s", buf); |
c277df42 |
3397 | } |
a0ed51b3 |
3398 | |
3399 | /* XXX Here's a total kludge. But we need to re-enter for swash routines. */ |
3400 | |
3401 | void |
864dbfa3 |
3402 | Perl_save_re_context(pTHX) |
c485e607 |
3403 | { |
3404 | dTHR; |
a0ed51b3 |
3405 | SAVEPPTR(PL_bostr); |
3406 | SAVEPPTR(PL_regprecomp); /* uncompiled string. */ |
3407 | SAVEI32(PL_regnpar); /* () count. */ |
3408 | SAVEI32(PL_regsize); /* Code size. */ |
3409 | SAVEI16(PL_regflags); /* are we folding, multilining? */ |
3410 | SAVEPPTR(PL_reginput); /* String-input pointer. */ |
3411 | SAVEPPTR(PL_regbol); /* Beginning of input, for ^ check. */ |
3412 | SAVEPPTR(PL_regeol); /* End of input, for $ check. */ |
3413 | SAVESPTR(PL_regstartp); /* Pointer to startp array. */ |
3414 | SAVESPTR(PL_regendp); /* Ditto for endp. */ |
3415 | SAVESPTR(PL_reglastparen); /* Similarly for lastparen. */ |
3416 | SAVEPPTR(PL_regtill); /* How far we are required to go. */ |
3417 | SAVEI32(PL_regprev); /* char before regbol, \n if none */ |
3418 | SAVESPTR(PL_reg_start_tmp); /* from regexec.c */ |
3419 | PL_reg_start_tmp = 0; |
3420 | SAVEFREEPV(PL_reg_start_tmp); |
3421 | SAVEI32(PL_reg_start_tmpl); /* from regexec.c */ |
3422 | PL_reg_start_tmpl = 0; |
3423 | SAVESPTR(PL_regdata); |
3424 | SAVEI32(PL_reg_flags); /* from regexec.c */ |
3425 | SAVEI32(PL_reg_eval_set); /* from regexec.c */ |
3426 | SAVEI32(PL_regnarrate); /* from regexec.c */ |
3427 | SAVESPTR(PL_regprogram); /* from regexec.c */ |
3428 | SAVEINT(PL_regindent); /* from regexec.c */ |
3429 | SAVESPTR(PL_regcc); /* from regexec.c */ |
3430 | SAVESPTR(PL_curcop); |
3431 | SAVESPTR(PL_regcomp_rx); /* from regcomp.c */ |
3432 | SAVEI32(PL_regseen); /* from regcomp.c */ |
3433 | SAVEI32(PL_regsawback); /* Did we see \1, ...? */ |
3434 | SAVEI32(PL_regnaughty); /* How bad is this pattern? */ |
3435 | SAVESPTR(PL_regcode); /* Code-emit pointer; ®dummy = don't */ |
3436 | SAVEPPTR(PL_regxend); /* End of input for compile */ |
3437 | SAVEPPTR(PL_regcomp_parse); /* Input-scan pointer. */ |
54b6e2fa |
3438 | SAVESPTR(PL_reg_call_cc); /* from regexec.c */ |
3439 | SAVESPTR(PL_reg_re); /* from regexec.c */ |
3440 | SAVEPPTR(PL_reg_ganch); /* from regexec.c */ |
3441 | SAVESPTR(PL_reg_sv); /* from regexec.c */ |
3442 | SAVESPTR(PL_reg_magic); /* from regexec.c */ |
3443 | SAVEI32(PL_reg_oldpos); /* from regexec.c */ |
3444 | SAVESPTR(PL_reg_oldcurpm); /* from regexec.c */ |
3445 | SAVESPTR(PL_reg_curpm); /* from regexec.c */ |
3446 | #ifdef DEBUGGING |
3447 | SAVEPPTR(PL_reg_starttry); /* from regexec.c */ |
3448 | #endif |
a0ed51b3 |
3449 | } |
51371543 |
3450 | |
3451 | #ifdef PERL_OBJECT |
3452 | #define NO_XSLOCKS |
3453 | #include "XSUB.h" |
3454 | #undef this |
3455 | #define this pPerl |
3456 | #endif |
3457 | |
3458 | static void |
3459 | clear_re(pTHXo_ void *r) |
3460 | { |
3461 | ReREFCNT_dec((regexp *)r); |
3462 | } |
3463 | |