/[pcre]/code/trunk/pcre_dfa_exec.c
ViewVC logotype

Contents of /code/trunk/pcre_dfa_exec.c

Parent Directory Parent Directory | Revision Log Revision Log


Revision 1534 - (show annotations)
Tue Mar 24 10:33:21 2015 UTC (4 months ago) by ph10
File MIME type: text/plain
File size: 126709 byte(s)
Fix bugs caused by (?!) as a condition (which is converted to OP_FAIL).
1 /*************************************************
2 * Perl-Compatible Regular Expressions *
3 *************************************************/
4
5 /* PCRE is a library of functions to support regular expressions whose syntax
6 and semantics are as close as possible to those of the Perl 5 language (but see
7 below for why this module is different).
8
9 Written by Philip Hazel
10 Copyright (c) 1997-2014 University of Cambridge
11
12 -----------------------------------------------------------------------------
13 Redistribution and use in source and binary forms, with or without
14 modification, are permitted provided that the following conditions are met:
15
16 * Redistributions of source code must retain the above copyright notice,
17 this list of conditions and the following disclaimer.
18
19 * Redistributions in binary form must reproduce the above copyright
20 notice, this list of conditions and the following disclaimer in the
21 documentation and/or other materials provided with the distribution.
22
23 * Neither the name of the University of Cambridge nor the names of its
24 contributors may be used to endorse or promote products derived from
25 this software without specific prior written permission.
26
27 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
28 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
31 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 POSSIBILITY OF SUCH DAMAGE.
38 -----------------------------------------------------------------------------
39 */
40
41 /* This module contains the external function pcre_dfa_exec(), which is an
42 alternative matching function that uses a sort of DFA algorithm (not a true
43 FSM). This is NOT Perl-compatible, but it has advantages in certain
44 applications. */
45
46
47 /* NOTE ABOUT PERFORMANCE: A user of this function sent some code that improved
48 the performance of his patterns greatly. I could not use it as it stood, as it
49 was not thread safe, and made assumptions about pattern sizes. Also, it caused
50 test 7 to loop, and test 9 to crash with a segfault.
51
52 The issue is the check for duplicate states, which is done by a simple linear
53 search up the state list. (Grep for "duplicate" below to find the code.) For
54 many patterns, there will never be many states active at one time, so a simple
55 linear search is fine. In patterns that have many active states, it might be a
56 bottleneck. The suggested code used an indexing scheme to remember which states
57 had previously been used for each character, and avoided the linear search when
58 it knew there was no chance of a duplicate. This was implemented when adding
59 states to the state lists.
60
61 I wrote some thread-safe, not-limited code to try something similar at the time
62 of checking for duplicates (instead of when adding states), using index vectors
63 on the stack. It did give a 13% improvement with one specially constructed
64 pattern for certain subject strings, but on other strings and on many of the
65 simpler patterns in the test suite it did worse. The major problem, I think,
66 was the extra time to initialize the index. This had to be done for each call
67 of internal_dfa_exec(). (The supplied patch used a static vector, initialized
68 only once - I suspect this was the cause of the problems with the tests.)
69
70 Overall, I concluded that the gains in some cases did not outweigh the losses
71 in others, so I abandoned this code. */
72
73
74
75 #ifdef HAVE_CONFIG_H
76 #include "config.h"
77 #endif
78
79 #define NLBLOCK md /* Block containing newline information */
80 #define PSSTART start_subject /* Field containing processed string start */
81 #define PSEND end_subject /* Field containing processed string end */
82
83 #include "pcre_internal.h"
84
85
86 /* For use to indent debugging output */
87
88 #define SP " "
89
90
91 /*************************************************
92 * Code parameters and static tables *
93 *************************************************/
94
95 /* These are offsets that are used to turn the OP_TYPESTAR and friends opcodes
96 into others, under special conditions. A gap of 20 between the blocks should be
97 enough. The resulting opcodes don't have to be less than 256 because they are
98 never stored, so we push them well clear of the normal opcodes. */
99
100 #define OP_PROP_EXTRA 300
101 #define OP_EXTUNI_EXTRA 320
102 #define OP_ANYNL_EXTRA 340
103 #define OP_HSPACE_EXTRA 360
104 #define OP_VSPACE_EXTRA 380
105
106
107 /* This table identifies those opcodes that are followed immediately by a
108 character that is to be tested in some way. This makes it possible to
109 centralize the loading of these characters. In the case of Type * etc, the
110 "character" is the opcode for \D, \d, \S, \s, \W, or \w, which will always be a
111 small value. Non-zero values in the table are the offsets from the opcode where
112 the character is to be found. ***NOTE*** If the start of this table is
113 modified, the three tables that follow must also be modified. */
114
115 static const pcre_uint8 coptable[] = {
116 0, /* End */
117 0, 0, 0, 0, 0, /* \A, \G, \K, \B, \b */
118 0, 0, 0, 0, 0, 0, /* \D, \d, \S, \s, \W, \w */
119 0, 0, 0, /* Any, AllAny, Anybyte */
120 0, 0, /* \P, \p */
121 0, 0, 0, 0, 0, /* \R, \H, \h, \V, \v */
122 0, /* \X */
123 0, 0, 0, 0, 0, 0, /* \Z, \z, $, $M, ^, ^M */
124 1, /* Char */
125 1, /* Chari */
126 1, /* not */
127 1, /* noti */
128 /* Positive single-char repeats */
129 1, 1, 1, 1, 1, 1, /* *, *?, +, +?, ?, ?? */
130 1+IMM2_SIZE, 1+IMM2_SIZE, /* upto, minupto */
131 1+IMM2_SIZE, /* exact */
132 1, 1, 1, 1+IMM2_SIZE, /* *+, ++, ?+, upto+ */
133 1, 1, 1, 1, 1, 1, /* *I, *?I, +I, +?I, ?I, ??I */
134 1+IMM2_SIZE, 1+IMM2_SIZE, /* upto I, minupto I */
135 1+IMM2_SIZE, /* exact I */
136 1, 1, 1, 1+IMM2_SIZE, /* *+I, ++I, ?+I, upto+I */
137 /* Negative single-char repeats - only for chars < 256 */
138 1, 1, 1, 1, 1, 1, /* NOT *, *?, +, +?, ?, ?? */
139 1+IMM2_SIZE, 1+IMM2_SIZE, /* NOT upto, minupto */
140 1+IMM2_SIZE, /* NOT exact */
141 1, 1, 1, 1+IMM2_SIZE, /* NOT *+, ++, ?+, upto+ */
142 1, 1, 1, 1, 1, 1, /* NOT *I, *?I, +I, +?I, ?I, ??I */
143 1+IMM2_SIZE, 1+IMM2_SIZE, /* NOT upto I, minupto I */
144 1+IMM2_SIZE, /* NOT exact I */
145 1, 1, 1, 1+IMM2_SIZE, /* NOT *+I, ++I, ?+I, upto+I */
146 /* Positive type repeats */
147 1, 1, 1, 1, 1, 1, /* Type *, *?, +, +?, ?, ?? */
148 1+IMM2_SIZE, 1+IMM2_SIZE, /* Type upto, minupto */
149 1+IMM2_SIZE, /* Type exact */
150 1, 1, 1, 1+IMM2_SIZE, /* Type *+, ++, ?+, upto+ */
151 /* Character class & ref repeats */
152 0, 0, 0, 0, 0, 0, /* *, *?, +, +?, ?, ?? */
153 0, 0, /* CRRANGE, CRMINRANGE */
154 0, 0, 0, 0, /* Possessive *+, ++, ?+, CRPOSRANGE */
155 0, /* CLASS */
156 0, /* NCLASS */
157 0, /* XCLASS - variable length */
158 0, /* REF */
159 0, /* REFI */
160 0, /* DNREF */
161 0, /* DNREFI */
162 0, /* RECURSE */
163 0, /* CALLOUT */
164 0, /* Alt */
165 0, /* Ket */
166 0, /* KetRmax */
167 0, /* KetRmin */
168 0, /* KetRpos */
169 0, /* Reverse */
170 0, /* Assert */
171 0, /* Assert not */
172 0, /* Assert behind */
173 0, /* Assert behind not */
174 0, 0, /* ONCE, ONCE_NC */
175 0, 0, 0, 0, 0, /* BRA, BRAPOS, CBRA, CBRAPOS, COND */
176 0, 0, 0, 0, 0, /* SBRA, SBRAPOS, SCBRA, SCBRAPOS, SCOND */
177 0, 0, /* CREF, DNCREF */
178 0, 0, /* RREF, DNRREF */
179 0, /* DEF */
180 0, 0, 0, /* BRAZERO, BRAMINZERO, BRAPOSZERO */
181 0, 0, 0, /* MARK, PRUNE, PRUNE_ARG */
182 0, 0, 0, 0, /* SKIP, SKIP_ARG, THEN, THEN_ARG */
183 0, 0, 0, 0, /* COMMIT, FAIL, ACCEPT, ASSERT_ACCEPT */
184 0, 0 /* CLOSE, SKIPZERO */
185 };
186
187 /* This table identifies those opcodes that inspect a character. It is used to
188 remember the fact that a character could have been inspected when the end of
189 the subject is reached. ***NOTE*** If the start of this table is modified, the
190 two tables that follow must also be modified. */
191
192 static const pcre_uint8 poptable[] = {
193 0, /* End */
194 0, 0, 0, 1, 1, /* \A, \G, \K, \B, \b */
195 1, 1, 1, 1, 1, 1, /* \D, \d, \S, \s, \W, \w */
196 1, 1, 1, /* Any, AllAny, Anybyte */
197 1, 1, /* \P, \p */
198 1, 1, 1, 1, 1, /* \R, \H, \h, \V, \v */
199 1, /* \X */
200 0, 0, 0, 0, 0, 0, /* \Z, \z, $, $M, ^, ^M */
201 1, /* Char */
202 1, /* Chari */
203 1, /* not */
204 1, /* noti */
205 /* Positive single-char repeats */
206 1, 1, 1, 1, 1, 1, /* *, *?, +, +?, ?, ?? */
207 1, 1, 1, /* upto, minupto, exact */
208 1, 1, 1, 1, /* *+, ++, ?+, upto+ */
209 1, 1, 1, 1, 1, 1, /* *I, *?I, +I, +?I, ?I, ??I */
210 1, 1, 1, /* upto I, minupto I, exact I */
211 1, 1, 1, 1, /* *+I, ++I, ?+I, upto+I */
212 /* Negative single-char repeats - only for chars < 256 */
213 1, 1, 1, 1, 1, 1, /* NOT *, *?, +, +?, ?, ?? */
214 1, 1, 1, /* NOT upto, minupto, exact */
215 1, 1, 1, 1, /* NOT *+, ++, ?+, upto+ */
216 1, 1, 1, 1, 1, 1, /* NOT *I, *?I, +I, +?I, ?I, ??I */
217 1, 1, 1, /* NOT upto I, minupto I, exact I */
218 1, 1, 1, 1, /* NOT *+I, ++I, ?+I, upto+I */
219 /* Positive type repeats */
220 1, 1, 1, 1, 1, 1, /* Type *, *?, +, +?, ?, ?? */
221 1, 1, 1, /* Type upto, minupto, exact */
222 1, 1, 1, 1, /* Type *+, ++, ?+, upto+ */
223 /* Character class & ref repeats */
224 1, 1, 1, 1, 1, 1, /* *, *?, +, +?, ?, ?? */
225 1, 1, /* CRRANGE, CRMINRANGE */
226 1, 1, 1, 1, /* Possessive *+, ++, ?+, CRPOSRANGE */
227 1, /* CLASS */
228 1, /* NCLASS */
229 1, /* XCLASS - variable length */
230 0, /* REF */
231 0, /* REFI */
232 0, /* DNREF */
233 0, /* DNREFI */
234 0, /* RECURSE */
235 0, /* CALLOUT */
236 0, /* Alt */
237 0, /* Ket */
238 0, /* KetRmax */
239 0, /* KetRmin */
240 0, /* KetRpos */
241 0, /* Reverse */
242 0, /* Assert */
243 0, /* Assert not */
244 0, /* Assert behind */
245 0, /* Assert behind not */
246 0, 0, /* ONCE, ONCE_NC */
247 0, 0, 0, 0, 0, /* BRA, BRAPOS, CBRA, CBRAPOS, COND */
248 0, 0, 0, 0, 0, /* SBRA, SBRAPOS, SCBRA, SCBRAPOS, SCOND */
249 0, 0, /* CREF, DNCREF */
250 0, 0, /* RREF, DNRREF */
251 0, /* DEF */
252 0, 0, 0, /* BRAZERO, BRAMINZERO, BRAPOSZERO */
253 0, 0, 0, /* MARK, PRUNE, PRUNE_ARG */
254 0, 0, 0, 0, /* SKIP, SKIP_ARG, THEN, THEN_ARG */
255 0, 0, 0, 0, /* COMMIT, FAIL, ACCEPT, ASSERT_ACCEPT */
256 0, 0 /* CLOSE, SKIPZERO */
257 };
258
259 /* These 2 tables allow for compact code for testing for \D, \d, \S, \s, \W,
260 and \w */
261
262 static const pcre_uint8 toptable1[] = {
263 0, 0, 0, 0, 0, 0,
264 ctype_digit, ctype_digit,
265 ctype_space, ctype_space,
266 ctype_word, ctype_word,
267 0, 0 /* OP_ANY, OP_ALLANY */
268 };
269
270 static const pcre_uint8 toptable2[] = {
271 0, 0, 0, 0, 0, 0,
272 ctype_digit, 0,
273 ctype_space, 0,
274 ctype_word, 0,
275 1, 1 /* OP_ANY, OP_ALLANY */
276 };
277
278
279 /* Structure for holding data about a particular state, which is in effect the
280 current data for an active path through the match tree. It must consist
281 entirely of ints because the working vector we are passed, and which we put
282 these structures in, is a vector of ints. */
283
284 typedef struct stateblock {
285 int offset; /* Offset to opcode */
286 int count; /* Count for repeats */
287 int data; /* Some use extra data */
288 } stateblock;
289
290 #define INTS_PER_STATEBLOCK (int)(sizeof(stateblock)/sizeof(int))
291
292
293 #ifdef PCRE_DEBUG
294 /*************************************************
295 * Print character string *
296 *************************************************/
297
298 /* Character string printing function for debugging.
299
300 Arguments:
301 p points to string
302 length number of bytes
303 f where to print
304
305 Returns: nothing
306 */
307
308 static void
309 pchars(const pcre_uchar *p, int length, FILE *f)
310 {
311 pcre_uint32 c;
312 while (length-- > 0)
313 {
314 if (isprint(c = *(p++)))
315 fprintf(f, "%c", c);
316 else
317 fprintf(f, "\\x{%02x}", c);
318 }
319 }
320 #endif
321
322
323
324 /*************************************************
325 * Execute a Regular Expression - DFA engine *
326 *************************************************/
327
328 /* This internal function applies a compiled pattern to a subject string,
329 starting at a given point, using a DFA engine. This function is called from the
330 external one, possibly multiple times if the pattern is not anchored. The
331 function calls itself recursively for some kinds of subpattern.
332
333 Arguments:
334 md the match_data block with fixed information
335 this_start_code the opening bracket of this subexpression's code
336 current_subject where we currently are in the subject string
337 start_offset start offset in the subject string
338 offsets vector to contain the matching string offsets
339 offsetcount size of same
340 workspace vector of workspace
341 wscount size of same
342 rlevel function call recursion level
343
344 Returns: > 0 => number of match offset pairs placed in offsets
345 = 0 => offsets overflowed; longest matches are present
346 -1 => failed to match
347 < -1 => some kind of unexpected problem
348
349 The following macros are used for adding states to the two state vectors (one
350 for the current character, one for the following character). */
351
352 #define ADD_ACTIVE(x,y) \
353 if (active_count++ < wscount) \
354 { \
355 next_active_state->offset = (x); \
356 next_active_state->count = (y); \
357 next_active_state++; \
358 DPRINTF(("%.*sADD_ACTIVE(%d,%d)\n", rlevel*2-2, SP, (x), (y))); \
359 } \
360 else return PCRE_ERROR_DFA_WSSIZE
361
362 #define ADD_ACTIVE_DATA(x,y,z) \
363 if (active_count++ < wscount) \
364 { \
365 next_active_state->offset = (x); \
366 next_active_state->count = (y); \
367 next_active_state->data = (z); \
368 next_active_state++; \
369 DPRINTF(("%.*sADD_ACTIVE_DATA(%d,%d,%d)\n", rlevel*2-2, SP, (x), (y), (z))); \
370 } \
371 else return PCRE_ERROR_DFA_WSSIZE
372
373 #define ADD_NEW(x,y) \
374 if (new_count++ < wscount) \
375 { \
376 next_new_state->offset = (x); \
377 next_new_state->count = (y); \
378 next_new_state++; \
379 DPRINTF(("%.*sADD_NEW(%d,%d)\n", rlevel*2-2, SP, (x), (y))); \
380 } \
381 else return PCRE_ERROR_DFA_WSSIZE
382
383 #define ADD_NEW_DATA(x,y,z) \
384 if (new_count++ < wscount) \
385 { \
386 next_new_state->offset = (x); \
387 next_new_state->count = (y); \
388 next_new_state->data = (z); \
389 next_new_state++; \
390 DPRINTF(("%.*sADD_NEW_DATA(%d,%d,%d) line %d\n", rlevel*2-2, SP, \
391 (x), (y), (z), __LINE__)); \
392 } \
393 else return PCRE_ERROR_DFA_WSSIZE
394
395 /* And now, here is the code */
396
397 static int
398 internal_dfa_exec(
399 dfa_match_data *md,
400 const pcre_uchar *this_start_code,
401 const pcre_uchar *current_subject,
402 int start_offset,
403 int *offsets,
404 int offsetcount,
405 int *workspace,
406 int wscount,
407 int rlevel)
408 {
409 stateblock *active_states, *new_states, *temp_states;
410 stateblock *next_active_state, *next_new_state;
411
412 const pcre_uint8 *ctypes, *lcc, *fcc;
413 const pcre_uchar *ptr;
414 const pcre_uchar *end_code, *first_op;
415
416 dfa_recursion_info new_recursive;
417
418 int active_count, new_count, match_count;
419
420 /* Some fields in the md block are frequently referenced, so we load them into
421 independent variables in the hope that this will perform better. */
422
423 const pcre_uchar *start_subject = md->start_subject;
424 const pcre_uchar *end_subject = md->end_subject;
425 const pcre_uchar *start_code = md->start_code;
426
427 #ifdef SUPPORT_UTF
428 BOOL utf = (md->poptions & PCRE_UTF8) != 0;
429 #else
430 BOOL utf = FALSE;
431 #endif
432
433 BOOL reset_could_continue = FALSE;
434
435 rlevel++;
436 offsetcount &= (-2);
437
438 wscount -= 2;
439 wscount = (wscount - (wscount % (INTS_PER_STATEBLOCK * 2))) /
440 (2 * INTS_PER_STATEBLOCK);
441
442 DPRINTF(("\n%.*s---------------------\n"
443 "%.*sCall to internal_dfa_exec f=%d\n",
444 rlevel*2-2, SP, rlevel*2-2, SP, rlevel));
445
446 ctypes = md->tables + ctypes_offset;
447 lcc = md->tables + lcc_offset;
448 fcc = md->tables + fcc_offset;
449
450 match_count = PCRE_ERROR_NOMATCH; /* A negative number */
451
452 active_states = (stateblock *)(workspace + 2);
453 next_new_state = new_states = active_states + wscount;
454 new_count = 0;
455
456 first_op = this_start_code + 1 + LINK_SIZE +
457 ((*this_start_code == OP_CBRA || *this_start_code == OP_SCBRA ||
458 *this_start_code == OP_CBRAPOS || *this_start_code == OP_SCBRAPOS)
459 ? IMM2_SIZE:0);
460
461 /* The first thing in any (sub) pattern is a bracket of some sort. Push all
462 the alternative states onto the list, and find out where the end is. This
463 makes is possible to use this function recursively, when we want to stop at a
464 matching internal ket rather than at the end.
465
466 If the first opcode in the first alternative is OP_REVERSE, we are dealing with
467 a backward assertion. In that case, we have to find out the maximum amount to
468 move back, and set up each alternative appropriately. */
469
470 if (*first_op == OP_REVERSE)
471 {
472 int max_back = 0;
473 int gone_back;
474
475 end_code = this_start_code;
476 do
477 {
478 int back = GET(end_code, 2+LINK_SIZE);
479 if (back > max_back) max_back = back;
480 end_code += GET(end_code, 1);
481 }
482 while (*end_code == OP_ALT);
483
484 /* If we can't go back the amount required for the longest lookbehind
485 pattern, go back as far as we can; some alternatives may still be viable. */
486
487 #ifdef SUPPORT_UTF
488 /* In character mode we have to step back character by character */
489
490 if (utf)
491 {
492 for (gone_back = 0; gone_back < max_back; gone_back++)
493 {
494 if (current_subject <= start_subject) break;
495 current_subject--;
496 ACROSSCHAR(current_subject > start_subject, *current_subject, current_subject--);
497 }
498 }
499 else
500 #endif
501
502 /* In byte-mode we can do this quickly. */
503
504 {
505 gone_back = (current_subject - max_back < start_subject)?
506 (int)(current_subject - start_subject) : max_back;
507 current_subject -= gone_back;
508 }
509
510 /* Save the earliest consulted character */
511
512 if (current_subject < md->start_used_ptr)
513 md->start_used_ptr = current_subject;
514
515 /* Now we can process the individual branches. */
516
517 end_code = this_start_code;
518 do
519 {
520 int back = GET(end_code, 2+LINK_SIZE);
521 if (back <= gone_back)
522 {
523 int bstate = (int)(end_code - start_code + 2 + 2*LINK_SIZE);
524 ADD_NEW_DATA(-bstate, 0, gone_back - back);
525 }
526 end_code += GET(end_code, 1);
527 }
528 while (*end_code == OP_ALT);
529 }
530
531 /* This is the code for a "normal" subpattern (not a backward assertion). The
532 start of a whole pattern is always one of these. If we are at the top level,
533 we may be asked to restart matching from the same point that we reached for a
534 previous partial match. We still have to scan through the top-level branches to
535 find the end state. */
536
537 else
538 {
539 end_code = this_start_code;
540
541 /* Restarting */
542
543 if (rlevel == 1 && (md->moptions & PCRE_DFA_RESTART) != 0)
544 {
545 do { end_code += GET(end_code, 1); } while (*end_code == OP_ALT);
546 new_count = workspace[1];
547 if (!workspace[0])
548 memcpy(new_states, active_states, new_count * sizeof(stateblock));
549 }
550
551 /* Not restarting */
552
553 else
554 {
555 int length = 1 + LINK_SIZE +
556 ((*this_start_code == OP_CBRA || *this_start_code == OP_SCBRA ||
557 *this_start_code == OP_CBRAPOS || *this_start_code == OP_SCBRAPOS)
558 ? IMM2_SIZE:0);
559 do
560 {
561 ADD_NEW((int)(end_code - start_code + length), 0);
562 end_code += GET(end_code, 1);
563 length = 1 + LINK_SIZE;
564 }
565 while (*end_code == OP_ALT);
566 }
567 }
568
569 workspace[0] = 0; /* Bit indicating which vector is current */
570
571 DPRINTF(("%.*sEnd state = %d\n", rlevel*2-2, SP, (int)(end_code - start_code)));
572
573 /* Loop for scanning the subject */
574
575 ptr = current_subject;
576 for (;;)
577 {
578 int i, j;
579 int clen, dlen;
580 pcre_uint32 c, d;
581 int forced_fail = 0;
582 BOOL partial_newline = FALSE;
583 BOOL could_continue = reset_could_continue;
584 reset_could_continue = FALSE;
585
586 /* Make the new state list into the active state list and empty the
587 new state list. */
588
589 temp_states = active_states;
590 active_states = new_states;
591 new_states = temp_states;
592 active_count = new_count;
593 new_count = 0;
594
595 workspace[0] ^= 1; /* Remember for the restarting feature */
596 workspace[1] = active_count;
597
598 #ifdef PCRE_DEBUG
599 printf("%.*sNext character: rest of subject = \"", rlevel*2-2, SP);
600 pchars(ptr, STRLEN_UC(ptr), stdout);
601 printf("\"\n");
602
603 printf("%.*sActive states: ", rlevel*2-2, SP);
604 for (i = 0; i < active_count; i++)
605 printf("%d/%d ", active_states[i].offset, active_states[i].count);
606 printf("\n");
607 #endif
608
609 /* Set the pointers for adding new states */
610
611 next_active_state = active_states + active_count;
612 next_new_state = new_states;
613
614 /* Load the current character from the subject outside the loop, as many
615 different states may want to look at it, and we assume that at least one
616 will. */
617
618 if (ptr < end_subject)
619 {
620 clen = 1; /* Number of data items in the character */
621 #ifdef SUPPORT_UTF
622 GETCHARLENTEST(c, ptr, clen);
623 #else
624 c = *ptr;
625 #endif /* SUPPORT_UTF */
626 }
627 else
628 {
629 clen = 0; /* This indicates the end of the subject */
630 c = NOTACHAR; /* This value should never actually be used */
631 }
632
633 /* Scan up the active states and act on each one. The result of an action
634 may be to add more states to the currently active list (e.g. on hitting a
635 parenthesis) or it may be to put states on the new list, for considering
636 when we move the character pointer on. */
637
638 for (i = 0; i < active_count; i++)
639 {
640 stateblock *current_state = active_states + i;
641 BOOL caseless = FALSE;
642 const pcre_uchar *code;
643 int state_offset = current_state->offset;
644 int codevalue, rrc;
645 int count;
646
647 #ifdef PCRE_DEBUG
648 printf ("%.*sProcessing state %d c=", rlevel*2-2, SP, state_offset);
649 if (clen == 0) printf("EOL\n");
650 else if (c > 32 && c < 127) printf("'%c'\n", c);
651 else printf("0x%02x\n", c);
652 #endif
653
654 /* A negative offset is a special case meaning "hold off going to this
655 (negated) state until the number of characters in the data field have
656 been skipped". If the could_continue flag was passed over from a previous
657 state, arrange for it to passed on. */
658
659 if (state_offset < 0)
660 {
661 if (current_state->data > 0)
662 {
663 DPRINTF(("%.*sSkipping this character\n", rlevel*2-2, SP));
664 ADD_NEW_DATA(state_offset, current_state->count,
665 current_state->data - 1);
666 if (could_continue) reset_could_continue = TRUE;
667 continue;
668 }
669 else
670 {
671 current_state->offset = state_offset = -state_offset;
672 }
673 }
674
675 /* Check for a duplicate state with the same count, and skip if found.
676 See the note at the head of this module about the possibility of improving
677 performance here. */
678
679 for (j = 0; j < i; j++)
680 {
681 if (active_states[j].offset == state_offset &&
682 active_states[j].count == current_state->count)
683 {
684 DPRINTF(("%.*sDuplicate state: skipped\n", rlevel*2-2, SP));
685 goto NEXT_ACTIVE_STATE;
686 }
687 }
688
689 /* The state offset is the offset to the opcode */
690
691 code = start_code + state_offset;
692 codevalue = *code;
693
694 /* If this opcode inspects a character, but we are at the end of the
695 subject, remember the fact for use when testing for a partial match. */
696
697 if (clen == 0 && poptable[codevalue] != 0)
698 could_continue = TRUE;
699
700 /* If this opcode is followed by an inline character, load it. It is
701 tempting to test for the presence of a subject character here, but that
702 is wrong, because sometimes zero repetitions of the subject are
703 permitted.
704
705 We also use this mechanism for opcodes such as OP_TYPEPLUS that take an
706 argument that is not a data character - but is always one byte long because
707 the values are small. We have to take special action to deal with \P, \p,
708 \H, \h, \V, \v and \X in this case. To keep the other cases fast, convert
709 these ones to new opcodes. */
710
711 if (coptable[codevalue] > 0)
712 {
713 dlen = 1;
714 #ifdef SUPPORT_UTF
715 if (utf) { GETCHARLEN(d, (code + coptable[codevalue]), dlen); } else
716 #endif /* SUPPORT_UTF */
717 d = code[coptable[codevalue]];
718 if (codevalue >= OP_TYPESTAR)
719 {
720 switch(d)
721 {
722 case OP_ANYBYTE: return PCRE_ERROR_DFA_UITEM;
723 case OP_NOTPROP:
724 case OP_PROP: codevalue += OP_PROP_EXTRA; break;
725 case OP_ANYNL: codevalue += OP_ANYNL_EXTRA; break;
726 case OP_EXTUNI: codevalue += OP_EXTUNI_EXTRA; break;
727 case OP_NOT_HSPACE:
728 case OP_HSPACE: codevalue += OP_HSPACE_EXTRA; break;
729 case OP_NOT_VSPACE:
730 case OP_VSPACE: codevalue += OP_VSPACE_EXTRA; break;
731 default: break;
732 }
733 }
734 }
735 else
736 {
737 dlen = 0; /* Not strictly necessary, but compilers moan */
738 d = NOTACHAR; /* if these variables are not set. */
739 }
740
741
742 /* Now process the individual opcodes */
743
744 switch (codevalue)
745 {
746 /* ========================================================================== */
747 /* These cases are never obeyed. This is a fudge that causes a compile-
748 time error if the vectors coptable or poptable, which are indexed by
749 opcode, are not the correct length. It seems to be the only way to do
750 such a check at compile time, as the sizeof() operator does not work
751 in the C preprocessor. */
752
753 case OP_TABLE_LENGTH:
754 case OP_TABLE_LENGTH +
755 ((sizeof(coptable) == OP_TABLE_LENGTH) &&
756 (sizeof(poptable) == OP_TABLE_LENGTH)):
757 break;
758
759 /* ========================================================================== */
760 /* Reached a closing bracket. If not at the end of the pattern, carry
761 on with the next opcode. For repeating opcodes, also add the repeat
762 state. Note that KETRPOS will always be encountered at the end of the
763 subpattern, because the possessive subpattern repeats are always handled
764 using recursive calls. Thus, it never adds any new states.
765
766 At the end of the (sub)pattern, unless we have an empty string and
767 PCRE_NOTEMPTY is set, or PCRE_NOTEMPTY_ATSTART is set and we are at the
768 start of the subject, save the match data, shifting up all previous
769 matches so we always have the longest first. */
770
771 case OP_KET:
772 case OP_KETRMIN:
773 case OP_KETRMAX:
774 case OP_KETRPOS:
775 if (code != end_code)
776 {
777 ADD_ACTIVE(state_offset + 1 + LINK_SIZE, 0);
778 if (codevalue != OP_KET)
779 {
780 ADD_ACTIVE(state_offset - GET(code, 1), 0);
781 }
782 }
783 else
784 {
785 if (ptr > current_subject ||
786 ((md->moptions & PCRE_NOTEMPTY) == 0 &&
787 ((md->moptions & PCRE_NOTEMPTY_ATSTART) == 0 ||
788 current_subject > start_subject + md->start_offset)))
789 {
790 if (match_count < 0) match_count = (offsetcount >= 2)? 1 : 0;
791 else if (match_count > 0 && ++match_count * 2 > offsetcount)
792 match_count = 0;
793 count = ((match_count == 0)? offsetcount : match_count * 2) - 2;
794 if (count > 0) memmove(offsets + 2, offsets, count * sizeof(int));
795 if (offsetcount >= 2)
796 {
797 offsets[0] = (int)(current_subject - start_subject);
798 offsets[1] = (int)(ptr - start_subject);
799 DPRINTF(("%.*sSet matched string = \"%.*s\"\n", rlevel*2-2, SP,
800 offsets[1] - offsets[0], (char *)current_subject));
801 }
802 if ((md->moptions & PCRE_DFA_SHORTEST) != 0)
803 {
804 DPRINTF(("%.*sEnd of internal_dfa_exec %d: returning %d\n"
805 "%.*s---------------------\n\n", rlevel*2-2, SP, rlevel,
806 match_count, rlevel*2-2, SP));
807 return match_count;
808 }
809 }
810 }
811 break;
812
813 /* ========================================================================== */
814 /* These opcodes add to the current list of states without looking
815 at the current character. */
816
817 /*-----------------------------------------------------------------*/
818 case OP_ALT:
819 do { code += GET(code, 1); } while (*code == OP_ALT);
820 ADD_ACTIVE((int)(code - start_code), 0);
821 break;
822
823 /*-----------------------------------------------------------------*/
824 case OP_BRA:
825 case OP_SBRA:
826 do
827 {
828 ADD_ACTIVE((int)(code - start_code + 1 + LINK_SIZE), 0);
829 code += GET(code, 1);
830 }
831 while (*code == OP_ALT);
832 break;
833
834 /*-----------------------------------------------------------------*/
835 case OP_CBRA:
836 case OP_SCBRA:
837 ADD_ACTIVE((int)(code - start_code + 1 + LINK_SIZE + IMM2_SIZE), 0);
838 code += GET(code, 1);
839 while (*code == OP_ALT)
840 {
841 ADD_ACTIVE((int)(code - start_code + 1 + LINK_SIZE), 0);
842 code += GET(code, 1);
843 }
844 break;
845
846 /*-----------------------------------------------------------------*/
847 case OP_BRAZERO:
848 case OP_BRAMINZERO:
849 ADD_ACTIVE(state_offset + 1, 0);
850 code += 1 + GET(code, 2);
851 while (*code == OP_ALT) code += GET(code, 1);
852 ADD_ACTIVE((int)(code - start_code + 1 + LINK_SIZE), 0);
853 break;
854
855 /*-----------------------------------------------------------------*/
856 case OP_SKIPZERO:
857 code += 1 + GET(code, 2);
858 while (*code == OP_ALT) code += GET(code, 1);
859 ADD_ACTIVE((int)(code - start_code + 1 + LINK_SIZE), 0);
860 break;
861
862 /*-----------------------------------------------------------------*/
863 case OP_CIRC:
864 if (ptr == start_subject && (md->moptions & PCRE_NOTBOL) == 0)
865 { ADD_ACTIVE(state_offset + 1, 0); }
866 break;
867
868 /*-----------------------------------------------------------------*/
869 case OP_CIRCM:
870 if ((ptr == start_subject && (md->moptions & PCRE_NOTBOL) == 0) ||
871 (ptr != end_subject && WAS_NEWLINE(ptr)))
872 { ADD_ACTIVE(state_offset + 1, 0); }
873 break;
874
875 /*-----------------------------------------------------------------*/
876 case OP_EOD:
877 if (ptr >= end_subject)
878 {
879 if ((md->moptions & PCRE_PARTIAL_HARD) != 0)
880 could_continue = TRUE;
881 else { ADD_ACTIVE(state_offset + 1, 0); }
882 }
883 break;
884
885 /*-----------------------------------------------------------------*/
886 case OP_SOD:
887 if (ptr == start_subject) { ADD_ACTIVE(state_offset + 1, 0); }
888 break;
889
890 /*-----------------------------------------------------------------*/
891 case OP_SOM:
892 if (ptr == start_subject + start_offset) { ADD_ACTIVE(state_offset + 1, 0); }
893 break;
894
895
896 /* ========================================================================== */
897 /* These opcodes inspect the next subject character, and sometimes
898 the previous one as well, but do not have an argument. The variable
899 clen contains the length of the current character and is zero if we are
900 at the end of the subject. */
901
902 /*-----------------------------------------------------------------*/
903 case OP_ANY:
904 if (clen > 0 && !IS_NEWLINE(ptr))
905 {
906 if (ptr + 1 >= md->end_subject &&
907 (md->moptions & (PCRE_PARTIAL_HARD)) != 0 &&
908 NLBLOCK->nltype == NLTYPE_FIXED &&
909 NLBLOCK->nllen == 2 &&
910 c == NLBLOCK->nl[0])
911 {
912 could_continue = partial_newline = TRUE;
913 }
914 else
915 {
916 ADD_NEW(state_offset + 1, 0);
917 }
918 }
919 break;
920
921 /*-----------------------------------------------------------------*/
922 case OP_ALLANY:
923 if (clen > 0)
924 { ADD_NEW(state_offset + 1, 0); }
925 break;
926
927 /*-----------------------------------------------------------------*/
928 case OP_EODN:
929 if (clen == 0 && (md->moptions & PCRE_PARTIAL_HARD) != 0)
930 could_continue = TRUE;
931 else if (clen == 0 || (IS_NEWLINE(ptr) && ptr == end_subject - md->nllen))
932 { ADD_ACTIVE(state_offset + 1, 0); }
933 break;
934
935 /*-----------------------------------------------------------------*/
936 case OP_DOLL:
937 if ((md->moptions & PCRE_NOTEOL) == 0)
938 {
939 if (clen == 0 && (md->moptions & PCRE_PARTIAL_HARD) != 0)
940 could_continue = TRUE;
941 else if (clen == 0 ||
942 ((md->poptions & PCRE_DOLLAR_ENDONLY) == 0 && IS_NEWLINE(ptr) &&
943 (ptr == end_subject - md->nllen)
944 ))
945 { ADD_ACTIVE(state_offset + 1, 0); }
946 else if (ptr + 1 >= md->end_subject &&
947 (md->moptions & (PCRE_PARTIAL_HARD|PCRE_PARTIAL_SOFT)) != 0 &&
948 NLBLOCK->nltype == NLTYPE_FIXED &&
949 NLBLOCK->nllen == 2 &&
950 c == NLBLOCK->nl[0])
951 {
952 if ((md->moptions & PCRE_PARTIAL_HARD) != 0)
953 {
954 reset_could_continue = TRUE;
955 ADD_NEW_DATA(-(state_offset + 1), 0, 1);
956 }
957 else could_continue = partial_newline = TRUE;
958 }
959 }
960 break;
961
962 /*-----------------------------------------------------------------*/
963 case OP_DOLLM:
964 if ((md->moptions & PCRE_NOTEOL) == 0)
965 {
966 if (clen == 0 && (md->moptions & PCRE_PARTIAL_HARD) != 0)
967 could_continue = TRUE;
968 else if (clen == 0 ||
969 ((md->poptions & PCRE_DOLLAR_ENDONLY) == 0 && IS_NEWLINE(ptr)))
970 { ADD_ACTIVE(state_offset + 1, 0); }
971 else if (ptr + 1 >= md->end_subject &&
972 (md->moptions & (PCRE_PARTIAL_HARD|PCRE_PARTIAL_SOFT)) != 0 &&
973 NLBLOCK->nltype == NLTYPE_FIXED &&
974 NLBLOCK->nllen == 2 &&
975 c == NLBLOCK->nl[0])
976 {
977 if ((md->moptions & PCRE_PARTIAL_HARD) != 0)
978 {
979 reset_could_continue = TRUE;
980 ADD_NEW_DATA(-(state_offset + 1), 0, 1);
981 }
982 else could_continue = partial_newline = TRUE;
983 }
984 }
985 else if (IS_NEWLINE(ptr))
986 { ADD_ACTIVE(state_offset + 1, 0); }
987 break;
988
989 /*-----------------------------------------------------------------*/
990
991 case OP_DIGIT:
992 case OP_WHITESPACE:
993 case OP_WORDCHAR:
994 if (clen > 0 && c < 256 &&
995 ((ctypes[c] & toptable1[codevalue]) ^ toptable2[codevalue]) != 0)
996 { ADD_NEW(state_offset + 1, 0); }
997 break;
998
999 /*-----------------------------------------------------------------*/
1000 case OP_NOT_DIGIT:
1001 case OP_NOT_WHITESPACE:
1002 case OP_NOT_WORDCHAR:
1003 if (clen > 0 && (c >= 256 ||
1004 ((ctypes[c] & toptable1[codevalue]) ^ toptable2[codevalue]) != 0))
1005 { ADD_NEW(state_offset + 1, 0); }
1006 break;
1007
1008 /*-----------------------------------------------------------------*/
1009 case OP_WORD_BOUNDARY:
1010 case OP_NOT_WORD_BOUNDARY:
1011 {
1012 int left_word, right_word;
1013
1014 if (ptr > start_subject)
1015 {
1016 const pcre_uchar *temp = ptr - 1;
1017 if (temp < md->start_used_ptr) md->start_used_ptr = temp;
1018 #if defined SUPPORT_UTF && !defined COMPILE_PCRE32
1019 if (utf) { BACKCHAR(temp); }
1020 #endif
1021 GETCHARTEST(d, temp);
1022 #ifdef SUPPORT_UCP
1023 if ((md->poptions & PCRE_UCP) != 0)
1024 {
1025 if (d == '_') left_word = TRUE; else
1026 {
1027 int cat = UCD_CATEGORY(d);
1028 left_word = (cat == ucp_L || cat == ucp_N);
1029 }
1030 }
1031 else
1032 #endif
1033 left_word = d < 256 && (ctypes[d] & ctype_word) != 0;
1034 }
1035 else left_word = FALSE;
1036
1037 if (clen > 0)
1038 {
1039 #ifdef SUPPORT_UCP
1040 if ((md->poptions & PCRE_UCP) != 0)
1041 {
1042 if (c == '_') right_word = TRUE; else
1043 {
1044 int cat = UCD_CATEGORY(c);
1045 right_word = (cat == ucp_L || cat == ucp_N);
1046 }
1047 }
1048 else
1049 #endif
1050 right_word = c < 256 && (ctypes[c] & ctype_word) != 0;
1051 }
1052 else right_word = FALSE;
1053
1054 if ((left_word == right_word) == (codevalue == OP_NOT_WORD_BOUNDARY))
1055 { ADD_ACTIVE(state_offset + 1, 0); }
1056 }
1057 break;
1058
1059
1060 /*-----------------------------------------------------------------*/
1061 /* Check the next character by Unicode property. We will get here only
1062 if the support is in the binary; otherwise a compile-time error occurs.
1063 */
1064
1065 #ifdef SUPPORT_UCP
1066 case OP_PROP:
1067 case OP_NOTPROP:
1068 if (clen > 0)
1069 {
1070 BOOL OK;
1071 const pcre_uint32 *cp;
1072 const ucd_record * prop = GET_UCD(c);
1073 switch(code[1])
1074 {
1075 case PT_ANY:
1076 OK = TRUE;
1077 break;
1078
1079 case PT_LAMP:
1080 OK = prop->chartype == ucp_Lu || prop->chartype == ucp_Ll ||
1081 prop->chartype == ucp_Lt;
1082 break;
1083
1084 case PT_GC:
1085 OK = PRIV(ucp_gentype)[prop->chartype] == code[2];
1086 break;
1087
1088 case PT_PC:
1089 OK = prop->chartype == code[2];
1090 break;
1091
1092 case PT_SC:
1093 OK = prop->script == code[2];
1094 break;
1095
1096 /* These are specials for combination cases. */
1097
1098 case PT_ALNUM:
1099 OK = PRIV(ucp_gentype)[prop->chartype] == ucp_L ||
1100 PRIV(ucp_gentype)[prop->chartype] == ucp_N;
1101 break;
1102
1103 /* Perl space used to exclude VT, but from Perl 5.18 it is included,
1104 which means that Perl space and POSIX space are now identical. PCRE
1105 was changed at release 8.34. */
1106
1107 case PT_SPACE: /* Perl space */
1108 case PT_PXSPACE: /* POSIX space */
1109 switch(c)
1110 {
1111 HSPACE_CASES:
1112 VSPACE_CASES:
1113 OK = TRUE;
1114 break;
1115
1116 default:
1117 OK = PRIV(ucp_gentype)[prop->chartype] == ucp_Z;
1118 break;
1119 }
1120 break;
1121
1122 case PT_WORD:
1123 OK = PRIV(ucp_gentype)[prop->chartype] == ucp_L ||
1124 PRIV(ucp_gentype)[prop->chartype] == ucp_N ||
1125 c == CHAR_UNDERSCORE;
1126 break;
1127
1128 case PT_CLIST:
1129 cp = PRIV(ucd_caseless_sets) + code[2];
1130 for (;;)
1131 {
1132 if (c < *cp) { OK = FALSE; break; }
1133 if (c == *cp++) { OK = TRUE; break; }
1134 }
1135 break;
1136
1137 case PT_UCNC:
1138 OK = c == CHAR_DOLLAR_SIGN || c == CHAR_COMMERCIAL_AT ||
1139 c == CHAR_GRAVE_ACCENT || (c >= 0xa0 && c <= 0xd7ff) ||
1140 c >= 0xe000;
1141 break;
1142
1143 /* Should never occur, but keep compilers from grumbling. */
1144
1145 default:
1146 OK = codevalue != OP_PROP;
1147 break;
1148 }
1149
1150 if (OK == (codevalue == OP_PROP)) { ADD_NEW(state_offset + 3, 0); }
1151 }
1152 break;
1153 #endif
1154
1155
1156
1157 /* ========================================================================== */
1158 /* These opcodes likewise inspect the subject character, but have an
1159 argument that is not a data character. It is one of these opcodes:
1160 OP_ANY, OP_ALLANY, OP_DIGIT, OP_NOT_DIGIT, OP_WHITESPACE, OP_NOT_SPACE,
1161 OP_WORDCHAR, OP_NOT_WORDCHAR. The value is loaded into d. */
1162
1163 case OP_TYPEPLUS:
1164 case OP_TYPEMINPLUS:
1165 case OP_TYPEPOSPLUS:
1166 count = current_state->count; /* Already matched */
1167 if (count > 0) { ADD_ACTIVE(state_offset + 2, 0); }
1168 if (clen > 0)
1169 {
1170 if (d == OP_ANY && ptr + 1 >= md->end_subject &&
1171 (md->moptions & (PCRE_PARTIAL_HARD)) != 0 &&
1172 NLBLOCK->nltype == NLTYPE_FIXED &&
1173 NLBLOCK->nllen == 2 &&
1174 c == NLBLOCK->nl[0])
1175 {
1176 could_continue = partial_newline = TRUE;
1177 }
1178 else if ((c >= 256 && d != OP_DIGIT && d != OP_WHITESPACE && d != OP_WORDCHAR) ||
1179 (c < 256 &&
1180 (d != OP_ANY || !IS_NEWLINE(ptr)) &&
1181 ((ctypes[c] & toptable1[d]) ^ toptable2[d]) != 0))
1182 {
1183 if (count > 0 && codevalue == OP_TYPEPOSPLUS)
1184 {
1185 active_count--; /* Remove non-match possibility */
1186 next_active_state--;
1187 }
1188 count++;
1189 ADD_NEW(state_offset, count);
1190 }
1191 }
1192 break;
1193
1194 /*-----------------------------------------------------------------*/
1195 case OP_TYPEQUERY:
1196 case OP_TYPEMINQUERY:
1197 case OP_TYPEPOSQUERY:
1198 ADD_ACTIVE(state_offset + 2, 0);
1199 if (clen > 0)
1200 {
1201 if (d == OP_ANY && ptr + 1 >= md->end_subject &&
1202 (md->moptions & (PCRE_PARTIAL_HARD)) != 0 &&
1203 NLBLOCK->nltype == NLTYPE_FIXED &&
1204 NLBLOCK->nllen == 2 &&
1205 c == NLBLOCK->nl[0])
1206 {
1207 could_continue = partial_newline = TRUE;
1208 }
1209 else if ((c >= 256 && d != OP_DIGIT && d != OP_WHITESPACE && d != OP_WORDCHAR) ||
1210 (c < 256 &&
1211 (d != OP_ANY || !IS_NEWLINE(ptr)) &&
1212 ((ctypes[c] & toptable1[d]) ^ toptable2[d]) != 0))
1213 {
1214 if (codevalue == OP_TYPEPOSQUERY)
1215 {
1216 active_count--; /* Remove non-match possibility */
1217 next_active_state--;
1218 }
1219 ADD_NEW(state_offset + 2, 0);
1220 }
1221 }
1222 break;
1223
1224 /*-----------------------------------------------------------------*/
1225 case OP_TYPESTAR:
1226 case OP_TYPEMINSTAR:
1227 case OP_TYPEPOSSTAR:
1228 ADD_ACTIVE(state_offset + 2, 0);
1229 if (clen > 0)
1230 {
1231 if (d == OP_ANY && ptr + 1 >= md->end_subject &&
1232 (md->moptions & (PCRE_PARTIAL_HARD)) != 0 &&
1233 NLBLOCK->nltype == NLTYPE_FIXED &&
1234 NLBLOCK->nllen == 2 &&
1235 c == NLBLOCK->nl[0])
1236 {
1237 could_continue = partial_newline = TRUE;
1238 }
1239 else if ((c >= 256 && d != OP_DIGIT && d != OP_WHITESPACE && d != OP_WORDCHAR) ||
1240 (c < 256 &&
1241 (d != OP_ANY || !IS_NEWLINE(ptr)) &&
1242 ((ctypes[c] & toptable1[d]) ^ toptable2[d]) != 0))
1243 {
1244 if (codevalue == OP_TYPEPOSSTAR)
1245 {
1246 active_count--; /* Remove non-match possibility */
1247 next_active_state--;
1248 }
1249 ADD_NEW(state_offset, 0);
1250 }
1251 }
1252 break;
1253
1254 /*-----------------------------------------------------------------*/
1255 case OP_TYPEEXACT:
1256 count = current_state->count; /* Number already matched */
1257 if (clen > 0)
1258 {
1259 if (d == OP_ANY && ptr + 1 >= md->end_subject &&
1260 (md->moptions & (PCRE_PARTIAL_HARD)) != 0 &&
1261 NLBLOCK->nltype == NLTYPE_FIXED &&
1262 NLBLOCK->nllen == 2 &&
1263 c == NLBLOCK->nl[0])
1264 {
1265 could_continue = partial_newline = TRUE;
1266 }
1267 else if ((c >= 256 && d != OP_DIGIT && d != OP_WHITESPACE && d != OP_WORDCHAR) ||
1268 (c < 256 &&
1269 (d != OP_ANY || !IS_NEWLINE(ptr)) &&
1270 ((ctypes[c] & toptable1[d]) ^ toptable2[d]) != 0))
1271 {
1272 if (++count >= (int)GET2(code, 1))
1273 { ADD_NEW(state_offset + 1 + IMM2_SIZE + 1, 0); }
1274 else
1275 { ADD_NEW(state_offset, count); }
1276 }
1277 }
1278 break;
1279
1280 /*-----------------------------------------------------------------*/
1281 case OP_TYPEUPTO:
1282 case OP_TYPEMINUPTO:
1283 case OP_TYPEPOSUPTO:
1284 ADD_ACTIVE(state_offset + 2 + IMM2_SIZE, 0);
1285 count = current_state->count; /* Number already matched */
1286 if (clen > 0)
1287 {
1288 if (d == OP_ANY && ptr + 1 >= md->end_subject &&
1289 (md->moptions & (PCRE_PARTIAL_HARD)) != 0 &&
1290 NLBLOCK->nltype == NLTYPE_FIXED &&
1291 NLBLOCK->nllen == 2 &&
1292 c == NLBLOCK->nl[0])
1293 {
1294 could_continue = partial_newline = TRUE;
1295 }
1296 else if ((c >= 256 && d != OP_DIGIT && d != OP_WHITESPACE && d != OP_WORDCHAR) ||
1297 (c < 256 &&
1298 (d != OP_ANY || !IS_NEWLINE(ptr)) &&
1299 ((ctypes[c] & toptable1[d]) ^ toptable2[d]) != 0))
1300 {
1301 if (codevalue == OP_TYPEPOSUPTO)
1302 {
1303 active_count--; /* Remove non-match possibility */
1304 next_active_state--;
1305 }
1306 if (++count >= (int)GET2(code, 1))
1307 { ADD_NEW(state_offset + 2 + IMM2_SIZE, 0); }
1308 else
1309 { ADD_NEW(state_offset, count); }
1310 }
1311 }
1312 break;
1313
1314 /* ========================================================================== */
1315 /* These are virtual opcodes that are used when something like
1316 OP_TYPEPLUS has OP_PROP, OP_NOTPROP, OP_ANYNL, or OP_EXTUNI as its
1317 argument. It keeps the code above fast for the other cases. The argument
1318 is in the d variable. */
1319
1320 #ifdef SUPPORT_UCP
1321 case OP_PROP_EXTRA + OP_TYPEPLUS:
1322 case OP_PROP_EXTRA + OP_TYPEMINPLUS:
1323 case OP_PROP_EXTRA + OP_TYPEPOSPLUS:
1324 count = current_state->count; /* Already matched */
1325 if (count > 0) { ADD_ACTIVE(state_offset + 4, 0); }
1326 if (clen > 0)
1327 {
1328 BOOL OK;
1329 const pcre_uint32 *cp;
1330 const ucd_record * prop = GET_UCD(c);
1331 switch(code[2])
1332 {
1333 case PT_ANY:
1334 OK = TRUE;
1335 break;
1336
1337 case PT_LAMP:
1338 OK = prop->chartype == ucp_Lu || prop->chartype == ucp_Ll ||
1339 prop->chartype == ucp_Lt;
1340 break;
1341
1342 case PT_GC:
1343 OK = PRIV(ucp_gentype)[prop->chartype] == code[3];
1344 break;
1345
1346 case PT_PC:
1347 OK = prop->chartype == code[3];
1348 break;
1349
1350 case PT_SC:
1351 OK = prop->script == code[3];
1352 break;
1353
1354 /* These are specials for combination cases. */
1355
1356 case PT_ALNUM:
1357 OK = PRIV(ucp_gentype)[prop->chartype] == ucp_L ||
1358 PRIV(ucp_gentype)[prop->chartype] == ucp_N;
1359 break;
1360
1361 /* Perl space used to exclude VT, but from Perl 5.18 it is included,
1362 which means that Perl space and POSIX space are now identical. PCRE
1363 was changed at release 8.34. */
1364
1365 case PT_SPACE: /* Perl space */
1366 case PT_PXSPACE: /* POSIX space */
1367 switch(c)
1368 {
1369 HSPACE_CASES:
1370 VSPACE_CASES:
1371 OK = TRUE;
1372 break;
1373
1374 default:
1375 OK = PRIV(ucp_gentype)[prop->chartype] == ucp_Z;
1376 break;
1377 }
1378 break;
1379
1380 case PT_WORD:
1381 OK = PRIV(ucp_gentype)[prop->chartype] == ucp_L ||
1382 PRIV(ucp_gentype)[prop->chartype] == ucp_N ||
1383 c == CHAR_UNDERSCORE;
1384 break;
1385
1386 case PT_CLIST:
1387 cp = PRIV(ucd_caseless_sets) + code[3];
1388 for (;;)
1389 {
1390 if (c < *cp) { OK = FALSE; break; }
1391 if (c == *cp++) { OK = TRUE; break; }
1392 }
1393 break;
1394
1395 case PT_UCNC:
1396 OK = c == CHAR_DOLLAR_SIGN || c == CHAR_COMMERCIAL_AT ||
1397 c == CHAR_GRAVE_ACCENT || (c >= 0xa0 && c <= 0xd7ff) ||
1398 c >= 0xe000;
1399 break;
1400
1401 /* Should never occur, but keep compilers from grumbling. */
1402
1403 default:
1404 OK = codevalue != OP_PROP;
1405 break;
1406 }
1407
1408 if (OK == (d == OP_PROP))
1409 {
1410 if (count > 0 && codevalue == OP_PROP_EXTRA + OP_TYPEPOSPLUS)
1411 {
1412 active_count--; /* Remove non-match possibility */
1413 next_active_state--;
1414 }
1415 count++;
1416 ADD_NEW(state_offset, count);
1417 }
1418 }
1419 break;
1420
1421 /*-----------------------------------------------------------------*/
1422 case OP_EXTUNI_EXTRA + OP_TYPEPLUS:
1423 case OP_EXTUNI_EXTRA + OP_TYPEMINPLUS:
1424 case OP_EXTUNI_EXTRA + OP_TYPEPOSPLUS:
1425 count = current_state->count; /* Already matched */
1426 if (count > 0) { ADD_ACTIVE(state_offset + 2, 0); }
1427 if (clen > 0)
1428 {
1429 int lgb, rgb;
1430 const pcre_uchar *nptr = ptr + clen;
1431 int ncount = 0;
1432 if (count > 0 && codevalue == OP_EXTUNI_EXTRA + OP_TYPEPOSPLUS)
1433 {
1434 active_count--; /* Remove non-match possibility */
1435 next_active_state--;
1436 }
1437 lgb = UCD_GRAPHBREAK(c);
1438 while (nptr < end_subject)
1439 {
1440 dlen = 1;
1441 if (!utf) d = *nptr; else { GETCHARLEN(d, nptr, dlen); }
1442 rgb = UCD_GRAPHBREAK(d);
1443 if ((PRIV(ucp_gbtable)[lgb] & (1 << rgb)) == 0) break;
1444 ncount++;
1445 lgb = rgb;
1446 nptr += dlen;
1447 }
1448 count++;
1449 ADD_NEW_DATA(-state_offset, count, ncount);
1450 }
1451 break;
1452 #endif
1453
1454 /*-----------------------------------------------------------------*/
1455 case OP_ANYNL_EXTRA + OP_TYPEPLUS:
1456 case OP_ANYNL_EXTRA + OP_TYPEMINPLUS:
1457 case OP_ANYNL_EXTRA + OP_TYPEPOSPLUS:
1458 count = current_state->count; /* Already matched */
1459 if (count > 0) { ADD_ACTIVE(state_offset + 2, 0); }
1460 if (clen > 0)
1461 {
1462 int ncount = 0;
1463 switch (c)
1464 {
1465 case CHAR_VT:
1466 case CHAR_FF:
1467 case CHAR_NEL:
1468 #ifndef EBCDIC
1469 case 0x2028:
1470 case 0x2029:
1471 #endif /* Not EBCDIC */
1472 if ((md->moptions & PCRE_BSR_ANYCRLF) != 0) break;
1473 goto ANYNL01;
1474
1475 case CHAR_CR:
1476 if (ptr + 1 < end_subject && UCHAR21TEST(ptr + 1) == CHAR_LF) ncount = 1;
1477 /* Fall through */
1478
1479 ANYNL01:
1480 case CHAR_LF:
1481 if (count > 0 && codevalue == OP_ANYNL_EXTRA + OP_TYPEPOSPLUS)
1482 {
1483 active_count--; /* Remove non-match possibility */
1484 next_active_state--;
1485 }
1486 count++;
1487 ADD_NEW_DATA(-state_offset, count, ncount);
1488 break;
1489
1490 default:
1491 break;
1492 }
1493 }
1494 break;
1495
1496 /*-----------------------------------------------------------------*/
1497 case OP_VSPACE_EXTRA + OP_TYPEPLUS:
1498 case OP_VSPACE_EXTRA + OP_TYPEMINPLUS:
1499 case OP_VSPACE_EXTRA + OP_TYPEPOSPLUS:
1500 count = current_state->count; /* Already matched */
1501 if (count > 0) { ADD_ACTIVE(state_offset + 2, 0); }
1502 if (clen > 0)
1503 {
1504 BOOL OK;
1505 switch (c)
1506 {
1507 VSPACE_CASES:
1508 OK = TRUE;
1509 break;
1510
1511 default:
1512 OK = FALSE;
1513 break;
1514 }
1515
1516 if (OK == (d == OP_VSPACE))
1517 {
1518 if (count > 0 && codevalue == OP_VSPACE_EXTRA + OP_TYPEPOSPLUS)
1519 {
1520 active_count--; /* Remove non-match possibility */
1521 next_active_state--;
1522 }
1523 count++;
1524 ADD_NEW_DATA(-state_offset, count, 0);
1525 }
1526 }
1527 break;
1528
1529 /*-----------------------------------------------------------------*/
1530 case OP_HSPACE_EXTRA + OP_TYPEPLUS:
1531 case OP_HSPACE_EXTRA + OP_TYPEMINPLUS:
1532 case OP_HSPACE_EXTRA + OP_TYPEPOSPLUS:
1533 count = current_state->count; /* Already matched */
1534 if (count > 0) { ADD_ACTIVE(state_offset + 2, 0); }
1535 if (clen > 0)
1536 {
1537 BOOL OK;
1538 switch (c)
1539 {
1540 HSPACE_CASES:
1541 OK = TRUE;
1542 break;
1543
1544 default:
1545 OK = FALSE;
1546 break;
1547 }
1548
1549 if (OK == (d == OP_HSPACE))
1550 {
1551 if (count > 0 && codevalue == OP_HSPACE_EXTRA + OP_TYPEPOSPLUS)
1552 {
1553 active_count--; /* Remove non-match possibility */
1554 next_active_state--;
1555 }
1556 count++;
1557 ADD_NEW_DATA(-state_offset, count, 0);
1558 }
1559 }
1560 break;
1561
1562 /*-----------------------------------------------------------------*/
1563 #ifdef SUPPORT_UCP
1564 case OP_PROP_EXTRA + OP_TYPEQUERY:
1565 case OP_PROP_EXTRA + OP_TYPEMINQUERY:
1566 case OP_PROP_EXTRA + OP_TYPEPOSQUERY:
1567 count = 4;
1568 goto QS1;
1569
1570 case OP_PROP_EXTRA + OP_TYPESTAR:
1571 case OP_PROP_EXTRA + OP_TYPEMINSTAR:
1572 case OP_PROP_EXTRA + OP_TYPEPOSSTAR:
1573 count = 0;
1574
1575 QS1:
1576
1577 ADD_ACTIVE(state_offset + 4, 0);
1578 if (clen > 0)
1579 {
1580 BOOL OK;
1581 const pcre_uint32 *cp;
1582 const ucd_record * prop = GET_UCD(c);
1583 switch(code[2])
1584 {
1585 case PT_ANY:
1586 OK = TRUE;
1587 break;
1588
1589 case PT_LAMP:
1590 OK = prop->chartype == ucp_Lu || prop->chartype == ucp_Ll ||
1591 prop->chartype == ucp_Lt;
1592 break;
1593
1594 case PT_GC:
1595 OK = PRIV(ucp_gentype)[prop->chartype] == code[3];
1596 break;
1597
1598 case PT_PC:
1599 OK = prop->chartype == code[3];
1600 break;
1601
1602 case PT_SC:
1603 OK = prop->script == code[3];
1604 break;
1605
1606 /* These are specials for combination cases. */
1607
1608 case PT_ALNUM:
1609 OK = PRIV(ucp_gentype)[prop->chartype] == ucp_L ||
1610 PRIV(ucp_gentype)[prop->chartype] == ucp_N;
1611 break;
1612
1613 /* Perl space used to exclude VT, but from Perl 5.18 it is included,
1614 which means that Perl space and POSIX space are now identical. PCRE
1615 was changed at release 8.34. */
1616
1617 case PT_SPACE: /* Perl space */
1618 case PT_PXSPACE: /* POSIX space */
1619 switch(c)
1620 {
1621 HSPACE_CASES:
1622 VSPACE_CASES:
1623 OK = TRUE;
1624 break;
1625
1626 default:
1627 OK = PRIV(ucp_gentype)[prop->chartype] == ucp_Z;
1628 break;
1629 }
1630 break;
1631
1632 case PT_WORD:
1633 OK = PRIV(ucp_gentype)[prop->chartype] == ucp_L ||
1634 PRIV(ucp_gentype)[prop->chartype] == ucp_N ||
1635 c == CHAR_UNDERSCORE;
1636 break;
1637
1638 case PT_CLIST:
1639 cp = PRIV(ucd_caseless_sets) + code[3];
1640 for (;;)
1641 {
1642 if (c < *cp) { OK = FALSE; break; }
1643 if (c == *cp++) { OK = TRUE; break; }
1644 }
1645 break;
1646
1647 case PT_UCNC:
1648 OK = c == CHAR_DOLLAR_SIGN || c == CHAR_COMMERCIAL_AT ||
1649 c == CHAR_GRAVE_ACCENT || (c >= 0xa0 && c <= 0xd7ff) ||
1650 c >= 0xe000;
1651 break;
1652
1653 /* Should never occur, but keep compilers from grumbling. */
1654
1655 default:
1656 OK = codevalue != OP_PROP;
1657 break;
1658 }
1659
1660 if (OK == (d == OP_PROP))
1661 {
1662 if (codevalue == OP_PROP_EXTRA + OP_TYPEPOSSTAR ||
1663 codevalue == OP_PROP_EXTRA + OP_TYPEPOSQUERY)
1664 {
1665 active_count--; /* Remove non-match possibility */
1666 next_active_state--;
1667 }
1668 ADD_NEW(state_offset + count, 0);
1669 }
1670 }
1671 break;
1672
1673 /*-----------------------------------------------------------------*/
1674 case OP_EXTUNI_EXTRA + OP_TYPEQUERY:
1675 case OP_EXTUNI_EXTRA + OP_TYPEMINQUERY:
1676 case OP_EXTUNI_EXTRA + OP_TYPEPOSQUERY:
1677 count = 2;
1678 goto QS2;
1679
1680 case OP_EXTUNI_EXTRA + OP_TYPESTAR:
1681 case OP_EXTUNI_EXTRA + OP_TYPEMINSTAR:
1682 case OP_EXTUNI_EXTRA + OP_TYPEPOSSTAR:
1683 count = 0;
1684
1685 QS2:
1686
1687 ADD_ACTIVE(state_offset + 2, 0);
1688 if (clen > 0)
1689 {
1690 int lgb, rgb;
1691 const pcre_uchar *nptr = ptr + clen;
1692 int ncount = 0;
1693 if (codevalue == OP_EXTUNI_EXTRA + OP_TYPEPOSSTAR ||
1694 codevalue == OP_EXTUNI_EXTRA + OP_TYPEPOSQUERY)
1695 {
1696 active_count--; /* Remove non-match possibility */
1697 next_active_state--;
1698 }
1699 lgb = UCD_GRAPHBREAK(c);
1700 while (nptr < end_subject)
1701 {
1702 dlen = 1;
1703 if (!utf) d = *nptr; else { GETCHARLEN(d, nptr, dlen); }
1704 rgb = UCD_GRAPHBREAK(d);
1705 if ((PRIV(ucp_gbtable)[lgb] & (1 << rgb)) == 0) break;
1706 ncount++;
1707 lgb = rgb;
1708 nptr += dlen;
1709 }
1710 ADD_NEW_DATA(-(state_offset + count), 0, ncount);
1711 }
1712 break;
1713 #endif
1714
1715 /*-----------------------------------------------------------------*/
1716 case OP_ANYNL_EXTRA + OP_TYPEQUERY:
1717 case OP_ANYNL_EXTRA + OP_TYPEMINQUERY:
1718 case OP_ANYNL_EXTRA + OP_TYPEPOSQUERY:
1719 count = 2;
1720 goto QS3;
1721
1722 case OP_ANYNL_EXTRA + OP_TYPESTAR:
1723 case OP_ANYNL_EXTRA + OP_TYPEMINSTAR:
1724 case OP_ANYNL_EXTRA + OP_TYPEPOSSTAR:
1725 count = 0;
1726
1727 QS3:
1728 ADD_ACTIVE(state_offset + 2, 0);
1729 if (clen > 0)
1730 {
1731 int ncount = 0;
1732 switch (c)
1733 {
1734 case CHAR_VT:
1735 case CHAR_FF:
1736 case CHAR_NEL:
1737 #ifndef EBCDIC
1738 case 0x2028:
1739 case 0x2029:
1740 #endif /* Not EBCDIC */
1741 if ((md->moptions & PCRE_BSR_ANYCRLF) != 0) break;
1742 goto ANYNL02;
1743
1744 case CHAR_CR:
1745 if (ptr + 1 < end_subject && UCHAR21TEST(ptr + 1) == CHAR_LF) ncount = 1;
1746 /* Fall through */
1747
1748 ANYNL02:
1749 case CHAR_LF:
1750 if (codevalue == OP_ANYNL_EXTRA + OP_TYPEPOSSTAR ||
1751 codevalue == OP_ANYNL_EXTRA + OP_TYPEPOSQUERY)
1752 {
1753 active_count--; /* Remove non-match possibility */
1754 next_active_state--;
1755 }
1756 ADD_NEW_DATA(-(state_offset + (int)count), 0, ncount);
1757 break;
1758
1759 default:
1760 break;
1761 }
1762 }
1763 break;
1764
1765 /*-----------------------------------------------------------------*/
1766 case OP_VSPACE_EXTRA + OP_TYPEQUERY:
1767 case OP_VSPACE_EXTRA + OP_TYPEMINQUERY:
1768 case OP_VSPACE_EXTRA + OP_TYPEPOSQUERY:
1769 count = 2;
1770 goto QS4;
1771
1772 case OP_VSPACE_EXTRA + OP_TYPESTAR:
1773 case OP_VSPACE_EXTRA + OP_TYPEMINSTAR:
1774 case OP_VSPACE_EXTRA + OP_TYPEPOSSTAR:
1775 count = 0;
1776
1777 QS4:
1778 ADD_ACTIVE(state_offset + 2, 0);
1779 if (clen > 0)
1780 {
1781 BOOL OK;
1782 switch (c)
1783 {
1784 VSPACE_CASES:
1785 OK = TRUE;
1786 break;
1787
1788 default:
1789 OK = FALSE;
1790 break;
1791 }
1792 if (OK == (d == OP_VSPACE))
1793 {
1794 if (codevalue == OP_VSPACE_EXTRA + OP_TYPEPOSSTAR ||
1795 codevalue == OP_VSPACE_EXTRA + OP_TYPEPOSQUERY)
1796 {
1797 active_count--; /* Remove non-match possibility */
1798 next_active_state--;
1799 }
1800 ADD_NEW_DATA(-(state_offset + (int)count), 0, 0);
1801 }
1802 }
1803 break;
1804
1805 /*-----------------------------------------------------------------*/
1806 case OP_HSPACE_EXTRA + OP_TYPEQUERY:
1807 case OP_HSPACE_EXTRA + OP_TYPEMINQUERY:
1808 case OP_HSPACE_EXTRA + OP_TYPEPOSQUERY:
1809 count = 2;
1810 goto QS5;
1811
1812 case OP_HSPACE_EXTRA + OP_TYPESTAR:
1813 case OP_HSPACE_EXTRA + OP_TYPEMINSTAR:
1814 case OP_HSPACE_EXTRA + OP_TYPEPOSSTAR:
1815 count = 0;
1816
1817 QS5:
1818 ADD_ACTIVE(state_offset + 2, 0);
1819 if (clen > 0)
1820 {
1821 BOOL OK;
1822 switch (c)
1823 {
1824 HSPACE_CASES:
1825 OK = TRUE;
1826 break;
1827
1828 default:
1829 OK = FALSE;
1830 break;
1831 }
1832
1833 if (OK == (d == OP_HSPACE))
1834 {
1835 if (codevalue == OP_HSPACE_EXTRA + OP_TYPEPOSSTAR ||
1836 codevalue == OP_HSPACE_EXTRA + OP_TYPEPOSQUERY)
1837 {
1838 active_count--; /* Remove non-match possibility */
1839 next_active_state--;
1840 }
1841 ADD_NEW_DATA(-(state_offset + (int)count), 0, 0);
1842 }
1843 }
1844 break;
1845
1846 /*-----------------------------------------------------------------*/
1847 #ifdef SUPPORT_UCP
1848 case OP_PROP_EXTRA + OP_TYPEEXACT:
1849 case OP_PROP_EXTRA + OP_TYPEUPTO:
1850 case OP_PROP_EXTRA + OP_TYPEMINUPTO:
1851 case OP_PROP_EXTRA + OP_TYPEPOSUPTO:
1852 if (codevalue != OP_PROP_EXTRA + OP_TYPEEXACT)
1853 { ADD_ACTIVE(state_offset + 1 + IMM2_SIZE + 3, 0); }
1854 count = current_state->count; /* Number already matched */
1855 if (clen > 0)
1856 {
1857 BOOL OK;
1858 const pcre_uint32 *cp;
1859 const ucd_record * prop = GET_UCD(c);
1860 switch(code[1 + IMM2_SIZE + 1])
1861 {
1862 case PT_ANY:
1863 OK = TRUE;
1864 break;
1865
1866 case PT_LAMP:
1867 OK = prop->chartype == ucp_Lu || prop->chartype == ucp_Ll ||
1868 prop->chartype == ucp_Lt;
1869 break;
1870
1871 case PT_GC:
1872 OK = PRIV(ucp_gentype)[prop->chartype] == code[1 + IMM2_SIZE + 2];
1873 break;
1874
1875 case PT_PC:
1876 OK = prop->chartype == code[1 + IMM2_SIZE + 2];
1877 break;
1878
1879 case PT_SC:
1880 OK = prop->script == code[1 + IMM2_SIZE + 2];
1881 break;
1882
1883 /* These are specials for combination cases. */
1884
1885 case PT_ALNUM:
1886 OK = PRIV(ucp_gentype)[prop->chartype] == ucp_L ||
1887 PRIV(ucp_gentype)[prop->chartype] == ucp_N;
1888 break;
1889
1890 /* Perl space used to exclude VT, but from Perl 5.18 it is included,
1891 which means that Perl space and POSIX space are now identical. PCRE
1892 was changed at release 8.34. */
1893
1894 case PT_SPACE: /* Perl space */
1895 case PT_PXSPACE: /* POSIX space */
1896 switch(c)
1897 {
1898 HSPACE_CASES:
1899 VSPACE_CASES:
1900 OK = TRUE;
1901 break;
1902
1903 default:
1904 OK = PRIV(ucp_gentype)[prop->chartype] == ucp_Z;
1905 break;
1906 }
1907 break;
1908
1909 case PT_WORD:
1910 OK = PRIV(ucp_gentype)[prop->chartype] == ucp_L ||
1911 PRIV(ucp_gentype)[prop->chartype] == ucp_N ||
1912 c == CHAR_UNDERSCORE;
1913 break;
1914
1915 case PT_CLIST:
1916 cp = PRIV(ucd_caseless_sets) + code[1 + IMM2_SIZE + 2];
1917 for (;;)
1918 {
1919 if (c < *cp) { OK = FALSE; break; }
1920 if (c == *cp++) { OK = TRUE; break; }
1921 }
1922 break;
1923
1924 case PT_UCNC:
1925 OK = c == CHAR_DOLLAR_SIGN || c == CHAR_COMMERCIAL_AT ||
1926 c == CHAR_GRAVE_ACCENT || (c >= 0xa0 && c <= 0xd7ff) ||
1927 c >= 0xe000;
1928 break;
1929
1930 /* Should never occur, but keep compilers from grumbling. */
1931
1932 default:
1933 OK = codevalue != OP_PROP;
1934 break;
1935 }
1936
1937 if (OK == (d == OP_PROP))
1938 {
1939 if (codevalue == OP_PROP_EXTRA + OP_TYPEPOSUPTO)
1940 {
1941 active_count--; /* Remove non-match possibility */
1942 next_active_state--;
1943 }
1944 if (++count >= (int)GET2(code, 1))
1945 { ADD_NEW(state_offset + 1 + IMM2_SIZE + 3, 0); }
1946 else
1947 { ADD_NEW(state_offset, count); }
1948 }
1949 }
1950 break;
1951
1952 /*-----------------------------------------------------------------*/
1953 case OP_EXTUNI_EXTRA + OP_TYPEEXACT:
1954 case OP_EXTUNI_EXTRA + OP_TYPEUPTO:
1955 case OP_EXTUNI_EXTRA + OP_TYPEMINUPTO:
1956 case OP_EXTUNI_EXTRA + OP_TYPEPOSUPTO:
1957 if (codevalue != OP_EXTUNI_EXTRA + OP_TYPEEXACT)
1958 { ADD_ACTIVE(state_offset + 2 + IMM2_SIZE, 0); }
1959 count = current_state->count; /* Number already matched */
1960 if (clen > 0)
1961 {
1962 int lgb, rgb;
1963 const pcre_uchar *nptr = ptr + clen;
1964 int ncount = 0;
1965 if (codevalue == OP_EXTUNI_EXTRA + OP_TYPEPOSUPTO)
1966 {
1967 active_count--; /* Remove non-match possibility */
1968 next_active_state--;
1969 }
1970 lgb = UCD_GRAPHBREAK(c);
1971 while (nptr < end_subject)
1972 {
1973 dlen = 1;
1974 if (!utf) d = *nptr; else { GETCHARLEN(d, nptr, dlen); }
1975 rgb = UCD_GRAPHBREAK(d);
1976 if ((PRIV(ucp_gbtable)[lgb] & (1 << rgb)) == 0) break;
1977 ncount++;
1978 lgb = rgb;
1979 nptr += dlen;
1980 }
1981 if (nptr >= end_subject && (md->moptions & PCRE_PARTIAL_HARD) != 0)
1982 reset_could_continue = TRUE;
1983 if (++count >= (int)GET2(code, 1))
1984 { ADD_NEW_DATA(-(state_offset + 2 + IMM2_SIZE), 0, ncount); }
1985 else
1986 { ADD_NEW_DATA(-state_offset, count, ncount); }
1987 }
1988 break;
1989 #endif
1990
1991 /*-----------------------------------------------------------------*/
1992 case OP_ANYNL_EXTRA + OP_TYPEEXACT:
1993 case OP_ANYNL_EXTRA + OP_TYPEUPTO:
1994 case OP_ANYNL_EXTRA + OP_TYPEMINUPTO:
1995 case OP_ANYNL_EXTRA + OP_TYPEPOSUPTO:
1996 if (codevalue != OP_ANYNL_EXTRA + OP_TYPEEXACT)
1997 { ADD_ACTIVE(state_offset + 2 + IMM2_SIZE, 0); }
1998 count = current_state->count; /* Number already matched */
1999 if (clen > 0)
2000 {
2001 int ncount = 0;
2002 switch (c)
2003 {
2004 case CHAR_VT:
2005 case CHAR_FF:
2006 case CHAR_NEL:
2007 #ifndef EBCDIC
2008 case 0x2028:
2009 case 0x2029:
2010 #endif /* Not EBCDIC */
2011 if ((md->moptions & PCRE_BSR_ANYCRLF) != 0) break;
2012 goto ANYNL03;
2013
2014 case CHAR_CR:
2015 if (ptr + 1 < end_subject && UCHAR21TEST(ptr + 1) == CHAR_LF) ncount = 1;
2016 /* Fall through */
2017
2018 ANYNL03:
2019 case CHAR_LF:
2020 if (codevalue == OP_ANYNL_EXTRA + OP_TYPEPOSUPTO)
2021 {
2022 active_count--; /* Remove non-match possibility */
2023 next_active_state--;
2024 }
2025 if (++count >= (int)GET2(code, 1))
2026 { ADD_NEW_DATA(-(state_offset + 2 + IMM2_SIZE), 0, ncount); }
2027 else
2028 { ADD_NEW_DATA(-state_offset, count, ncount); }
2029 break;
2030
2031 default:
2032 break;
2033 }
2034 }
2035 break;
2036
2037 /*-----------------------------------------------------------------*/
2038 case OP_VSPACE_EXTRA + OP_TYPEEXACT:
2039 case OP_VSPACE_EXTRA + OP_TYPEUPTO:
2040 case OP_VSPACE_EXTRA + OP_TYPEMINUPTO:
2041 case OP_VSPACE_EXTRA + OP_TYPEPOSUPTO:
2042 if (codevalue != OP_VSPACE_EXTRA + OP_TYPEEXACT)
2043 { ADD_ACTIVE(state_offset + 2 + IMM2_SIZE, 0); }
2044 count = current_state->count; /* Number already matched */
2045 if (clen > 0)
2046 {
2047 BOOL OK;
2048 switch (c)
2049 {
2050 VSPACE_CASES:
2051 OK = TRUE;
2052 break;
2053
2054 default:
2055 OK = FALSE;
2056 }
2057
2058 if (OK == (d == OP_VSPACE))
2059 {
2060 if (codevalue == OP_VSPACE_EXTRA + OP_TYPEPOSUPTO)
2061 {
2062 active_count--; /* Remove non-match possibility */
2063 next_active_state--;
2064 }
2065 if (++count >= (int)GET2(code, 1))
2066 { ADD_NEW_DATA(-(state_offset + 2 + IMM2_SIZE), 0, 0); }
2067 else
2068 { ADD_NEW_DATA(-state_offset, count, 0); }
2069 }
2070 }
2071 break;
2072
2073 /*-----------------------------------------------------------------*/
2074 case OP_HSPACE_EXTRA + OP_TYPEEXACT:
2075 case OP_HSPACE_EXTRA + OP_TYPEUPTO:
2076 case OP_HSPACE_EXTRA + OP_TYPEMINUPTO:
2077 case OP_HSPACE_EXTRA + OP_TYPEPOSUPTO:
2078 if (codevalue != OP_HSPACE_EXTRA + OP_TYPEEXACT)
2079 { ADD_ACTIVE(state_offset + 2 + IMM2_SIZE, 0); }
2080 count = current_state->count; /* Number already matched */
2081 if (clen > 0)
2082 {
2083 BOOL OK;
2084 switch (c)
2085 {
2086 HSPACE_CASES:
2087 OK = TRUE;
2088 break;
2089
2090 default:
2091 OK = FALSE;
2092 break;
2093 }
2094
2095 if (OK == (d == OP_HSPACE))
2096 {
2097 if (codevalue == OP_HSPACE_EXTRA + OP_TYPEPOSUPTO)
2098 {
2099 active_count--; /* Remove non-match possibility */
2100 next_active_state--;
2101 }
2102 if (++count >= (int)GET2(code, 1))
2103 { ADD_NEW_DATA(-(state_offset + 2 + IMM2_SIZE), 0, 0); }
2104 else
2105 { ADD_NEW_DATA(-state_offset, count, 0); }
2106 }
2107 }
2108 break;
2109
2110 /* ========================================================================== */
2111 /* These opcodes are followed by a character that is usually compared
2112 to the current subject character; it is loaded into d. We still get
2113 here even if there is no subject character, because in some cases zero
2114 repetitions are permitted. */
2115
2116 /*-----------------------------------------------------------------*/
2117 case OP_CHAR:
2118 if (clen > 0 && c == d) { ADD_NEW(state_offset + dlen + 1, 0); }
2119 break;
2120
2121 /*-----------------------------------------------------------------*/
2122 case OP_CHARI:
2123 if (clen == 0) break;
2124
2125 #ifdef SUPPORT_UTF
2126 if (utf)
2127 {
2128 if (c == d) { ADD_NEW(state_offset + dlen + 1, 0); } else
2129 {
2130 unsigned int othercase;
2131 if (c < 128)
2132 othercase = fcc[c];
2133 else
2134 /* If we have Unicode property support, we can use it to test the
2135 other case of the character. */
2136 #ifdef SUPPORT_UCP
2137 othercase = UCD_OTHERCASE(c);
2138 #else
2139 othercase = NOTACHAR;
2140 #endif
2141
2142 if (d == othercase) { ADD_NEW(state_offset + dlen + 1, 0); }
2143 }
2144 }
2145 else
2146 #endif /* SUPPORT_UTF */
2147 /* Not UTF mode */
2148 {
2149 if (TABLE_GET(c, lcc, c) == TABLE_GET(d, lcc, d))
2150 { ADD_NEW(state_offset + 2, 0); }
2151 }
2152 break;
2153
2154
2155 #ifdef SUPPORT_UCP
2156 /*-----------------------------------------------------------------*/
2157 /* This is a tricky one because it can match more than one character.
2158 Find out how many characters to skip, and then set up a negative state
2159 to wait for them to pass before continuing. */
2160
2161 case OP_EXTUNI:
2162 if (clen > 0)
2163 {
2164 int lgb, rgb;
2165 const pcre_uchar *nptr = ptr + clen;
2166 int ncount = 0;
2167 lgb = UCD_GRAPHBREAK(c);
2168 while (nptr < end_subject)
2169 {
2170 dlen = 1;
2171 if (!utf) d = *nptr; else { GETCHARLEN(d, nptr, dlen); }
2172 rgb = UCD_GRAPHBREAK(d);
2173 if ((PRIV(ucp_gbtable)[lgb] & (1 << rgb)) == 0) break;
2174 ncount++;
2175 lgb = rgb;
2176 nptr += dlen;
2177 }
2178 if (nptr >= end_subject && (md->moptions & PCRE_PARTIAL_HARD) != 0)
2179 reset_could_continue = TRUE;
2180 ADD_NEW_DATA(-(state_offset + 1), 0, ncount);
2181 }
2182 break;
2183 #endif
2184
2185 /*-----------------------------------------------------------------*/
2186 /* This is a tricky like EXTUNI because it too can match more than one
2187 character (when CR is followed by LF). In this case, set up a negative
2188 state to wait for one character to pass before continuing. */
2189
2190 case OP_ANYNL:
2191 if (clen > 0) switch(c)
2192 {
2193 case CHAR_VT:
2194 case CHAR_FF:
2195 case CHAR_NEL:
2196 #ifndef EBCDIC
2197 case 0x2028:
2198 case 0x2029:
2199 #endif /* Not EBCDIC */
2200 if ((md->moptions & PCRE_BSR_ANYCRLF) != 0) break;
2201
2202 case CHAR_LF:
2203 ADD_NEW(state_offset + 1, 0);
2204 break;
2205
2206 case CHAR_CR:
2207 if (ptr + 1 >= end_subject)
2208 {
2209 ADD_NEW(state_offset + 1, 0);
2210 if ((md->moptions & PCRE_PARTIAL_HARD) != 0)
2211 reset_could_continue = TRUE;
2212 }
2213 else if (UCHAR21TEST(ptr + 1) == CHAR_LF)
2214 {
2215 ADD_NEW_DATA(-(state_offset + 1), 0, 1);
2216 }
2217 else
2218 {
2219 ADD_NEW(state_offset + 1, 0);
2220 }
2221 break;
2222 }
2223 break;
2224
2225 /*-----------------------------------------------------------------*/
2226 case OP_NOT_VSPACE:
2227 if (clen > 0) switch(c)
2228 {
2229 VSPACE_CASES:
2230 break;
2231
2232 default:
2233 ADD_NEW(state_offset + 1, 0);
2234 break;
2235 }
2236 break;
2237
2238 /*-----------------------------------------------------------------*/
2239 case OP_VSPACE:
2240 if (clen > 0) switch(c)
2241 {
2242 VSPACE_CASES:
2243 ADD_NEW(state_offset + 1, 0);
2244 break;
2245
2246 default:
2247 break;
2248 }
2249 break;
2250
2251 /*-----------------------------------------------------------------*/
2252 case OP_NOT_HSPACE:
2253 if (clen > 0) switch(c)
2254 {
2255 HSPACE_CASES:
2256 break;
2257
2258 default:
2259 ADD_NEW(state_offset + 1, 0);
2260 break;
2261 }
2262 break;
2263
2264 /*-----------------------------------------------------------------*/
2265 case OP_HSPACE:
2266 if (clen > 0) switch(c)
2267 {
2268 HSPACE_CASES:
2269 ADD_NEW(state_offset + 1, 0);
2270 break;
2271
2272 default:
2273 break;
2274 }
2275 break;
2276
2277 /*-----------------------------------------------------------------*/
2278 /* Match a negated single character casefully. */
2279
2280 case OP_NOT:
2281 if (clen > 0 && c != d) { ADD_NEW(state_offset + dlen + 1, 0); }
2282 break;
2283
2284 /*-----------------------------------------------------------------*/
2285 /* Match a negated single character caselessly. */
2286
2287 case OP_NOTI:
2288 if (clen > 0)
2289 {
2290 unsigned int otherd;
2291 #ifdef SUPPORT_UTF
2292 if (utf && d >= 128)
2293 {
2294 #ifdef SUPPORT_UCP
2295 otherd = UCD_OTHERCASE(d);
2296 #endif /* SUPPORT_UCP */
2297 }
2298 else
2299 #endif /* SUPPORT_UTF */
2300 otherd = TABLE_GET(d, fcc, d);
2301 if (c != d && c != otherd)
2302 { ADD_NEW(state_offset + dlen + 1, 0); }
2303 }
2304 break;
2305
2306 /*-----------------------------------------------------------------*/
2307 case OP_PLUSI:
2308 case OP_MINPLUSI:
2309 case OP_POSPLUSI:
2310 case OP_NOTPLUSI:
2311 case OP_NOTMINPLUSI:
2312 case OP_NOTPOSPLUSI:
2313 caseless = TRUE;
2314 codevalue -= OP_STARI - OP_STAR;
2315
2316 /* Fall through */
2317 case OP_PLUS:
2318 case OP_MINPLUS:
2319 case OP_POSPLUS:
2320 case OP_NOTPLUS:
2321 case OP_NOTMINPLUS:
2322 case OP_NOTPOSPLUS:
2323 count = current_state->count; /* Already matched */
2324 if (count > 0) { ADD_ACTIVE(state_offset + dlen + 1, 0); }
2325 if (clen > 0)
2326 {
2327 pcre_uint32 otherd = NOTACHAR;
2328 if (caseless)
2329 {
2330 #ifdef SUPPORT_UTF
2331 if (utf && d >= 128)
2332 {
2333 #ifdef SUPPORT_UCP
2334 otherd = UCD_OTHERCASE(d);
2335 #endif /* SUPPORT_UCP */
2336 }
2337 else
2338 #endif /* SUPPORT_UTF */
2339 otherd = TABLE_GET(d, fcc, d);
2340 }
2341 if ((c == d || c == otherd) == (codevalue < OP_NOTSTAR))
2342 {
2343 if (count > 0 &&
2344 (codevalue == OP_POSPLUS || codevalue == OP_NOTPOSPLUS))
2345 {
2346 active_count--; /* Remove non-match possibility */
2347 next_active_state--;
2348 }
2349 count++;
2350 ADD_NEW(state_offset, count);
2351 }
2352 }
2353 break;
2354
2355 /*-----------------------------------------------------------------*/
2356 case OP_QUERYI:
2357 case OP_MINQUERYI:
2358 case OP_POSQUERYI:
2359 case OP_NOTQUERYI:
2360 case OP_NOTMINQUERYI:
2361 case OP_NOTPOSQUERYI:
2362 caseless = TRUE;
2363 codevalue -= OP_STARI - OP_STAR;
2364 /* Fall through */
2365 case OP_QUERY:
2366 case OP_MINQUERY:
2367 case OP_POSQUERY:
2368 case OP_NOTQUERY:
2369 case OP_NOTMINQUERY:
2370 case OP_NOTPOSQUERY:
2371 ADD_ACTIVE(state_offset + dlen + 1, 0);
2372 if (clen > 0)
2373 {
2374 pcre_uint32 otherd = NOTACHAR;
2375 if (caseless)
2376 {
2377 #ifdef SUPPORT_UTF
2378 if (utf && d >= 128)
2379 {
2380 #ifdef SUPPORT_UCP
2381 otherd = UCD_OTHERCASE(d);
2382 #endif /* SUPPORT_UCP */
2383 }
2384 else
2385 #endif /* SUPPORT_UTF */
2386 otherd = TABLE_GET(d, fcc, d);
2387 }
2388 if ((c == d || c == otherd) == (codevalue < OP_NOTSTAR))
2389 {
2390 if (codevalue == OP_POSQUERY || codevalue == OP_NOTPOSQUERY)
2391 {
2392 active_count--; /* Remove non-match possibility */
2393 next_active_state--;
2394 }
2395 ADD_NEW(state_offset + dlen + 1, 0);
2396 }
2397 }
2398 break;
2399
2400 /*-----------------------------------------------------------------*/
2401 case OP_STARI:
2402 case OP_MINSTARI:
2403 case OP_POSSTARI:
2404 case OP_NOTSTARI:
2405 case OP_NOTMINSTARI:
2406 case OP_NOTPOSSTARI:
2407 caseless = TRUE;
2408 codevalue -= OP_STARI - OP_STAR;
2409 /* Fall through */
2410 case OP_STAR:
2411 case OP_MINSTAR:
2412 case OP_POSSTAR:
2413 case OP_NOTSTAR:
2414 case OP_NOTMINSTAR:
2415 case OP_NOTPOSSTAR:
2416 ADD_ACTIVE(state_offset + dlen + 1, 0);
2417 if (clen > 0)
2418 {
2419 pcre_uint32 otherd = NOTACHAR;
2420 if (caseless)
2421 {
2422 #ifdef SUPPORT_UTF
2423 if (utf && d >= 128)
2424 {
2425 #ifdef SUPPORT_UCP
2426 otherd = UCD_OTHERCASE(d);
2427 #endif /* SUPPORT_UCP */
2428 }
2429 else
2430 #endif /* SUPPORT_UTF */
2431 otherd = TABLE_GET(d, fcc, d);
2432 }
2433 if ((c == d || c == otherd) == (codevalue < OP_NOTSTAR))
2434 {
2435 if (codevalue == OP_POSSTAR || codevalue == OP_NOTPOSSTAR)
2436 {
2437 active_count--; /* Remove non-match possibility */
2438 next_active_state--;
2439 }
2440 ADD_NEW(state_offset, 0);
2441 }
2442 }
2443 break;
2444
2445 /*-----------------------------------------------------------------*/
2446 case OP_EXACTI:
2447 case OP_NOTEXACTI:
2448 caseless = TRUE;
2449 codevalue -= OP_STARI - OP_STAR;
2450 /* Fall through */
2451 case OP_EXACT:
2452 case OP_NOTEXACT:
2453 count = current_state->count; /* Number already matched */
2454 if (clen > 0)
2455 {
2456 pcre_uint32 otherd = NOTACHAR;
2457 if (caseless)
2458 {
2459 #ifdef SUPPORT_UTF
2460 if (utf && d >= 128)
2461 {
2462 #ifdef SUPPORT_UCP
2463 otherd = UCD_OTHERCASE(d);
2464 #endif /* SUPPORT_UCP */
2465 }
2466 else
2467 #endif /* SUPPORT_UTF */
2468 otherd = TABLE_GET(d, fcc, d);
2469 }
2470 if ((c == d || c == otherd) == (codevalue < OP_NOTSTAR))
2471 {
2472 if (++count >= (int)GET2(code, 1))
2473 { ADD_NEW(state_offset + dlen + 1 + IMM2_SIZE, 0); }
2474 else
2475 { ADD_NEW(state_offset, count); }
2476 }
2477 }
2478 break;
2479
2480 /*-----------------------------------------------------------------*/
2481 case OP_UPTOI:
2482 case OP_MINUPTOI:
2483 case OP_POSUPTOI:
2484 case OP_NOTUPTOI:
2485 case OP_NOTMINUPTOI:
2486 case OP_NOTPOSUPTOI:
2487 caseless = TRUE;
2488 codevalue -= OP_STARI - OP_STAR;
2489 /* Fall through */
2490 case OP_UPTO:
2491 case OP_MINUPTO:
2492 case OP_POSUPTO:
2493 case OP_NOTUPTO:
2494 case OP_NOTMINUPTO:
2495 case OP_NOTPOSUPTO:
2496 ADD_ACTIVE(state_offset + dlen + 1 + IMM2_SIZE, 0);
2497 count = current_state->count; /* Number already matched */
2498 if (clen > 0)
2499 {
2500 pcre_uint32 otherd = NOTACHAR;
2501 if (caseless)
2502 {
2503 #ifdef SUPPORT_UTF
2504 if (utf && d >= 128)
2505 {
2506 #ifdef SUPPORT_UCP
2507 otherd = UCD_OTHERCASE(d);
2508 #endif /* SUPPORT_UCP */
2509 }
2510 else
2511 #endif /* SUPPORT_UTF */
2512 otherd = TABLE_GET(d, fcc, d);
2513 }
2514 if ((c == d || c == otherd) == (codevalue < OP_NOTSTAR))
2515 {
2516 if (codevalue == OP_POSUPTO || codevalue == OP_NOTPOSUPTO)
2517 {
2518 active_count--; /* Remove non-match possibility */
2519 next_active_state--;
2520 }
2521 if (++count >= (int)GET2(code, 1))
2522 { ADD_NEW(state_offset + dlen + 1 + IMM2_SIZE, 0); }
2523 else
2524 { ADD_NEW(state_offset, count); }
2525 }
2526 }
2527 break;
2528
2529
2530 /* ========================================================================== */
2531 /* These are the class-handling opcodes */
2532
2533 case OP_CLASS:
2534 case OP_NCLASS:
2535 case OP_XCLASS:
2536 {
2537 BOOL isinclass = FALSE;
2538 int next_state_offset;
2539 const pcre_uchar *ecode;
2540
2541 /* For a simple class, there is always just a 32-byte table, and we
2542 can set isinclass from it. */
2543
2544 if (codevalue != OP_XCLASS)
2545 {
2546 ecode = code + 1 + (32 / sizeof(pcre_uchar));
2547 if (clen > 0)
2548 {
2549 isinclass = (c > 255)? (codevalue == OP_NCLASS) :
2550 ((((pcre_uint8 *)(code + 1))[c/8] & (1 << (c&7))) != 0);
2551 }
2552 }
2553
2554 /* An extended class may have a table or a list of single characters,
2555 ranges, or both, and it may be positive or negative. There's a
2556 function that sorts all this out. */
2557
2558 else
2559 {
2560 ecode = code + GET(code, 1);
2561 if (clen > 0) isinclass = PRIV(xclass)(c, code + 1 + LINK_SIZE, utf);
2562 }
2563
2564 /* At this point, isinclass is set for all kinds of class, and ecode
2565 points to the byte after the end of the class. If there is a
2566 quantifier, this is where it will be. */
2567
2568 next_state_offset = (int)(ecode - start_code);
2569
2570 switch (*ecode)
2571 {
2572 case OP_CRSTAR:
2573 case OP_CRMINSTAR:
2574 case OP_CRPOSSTAR:
2575 ADD_ACTIVE(next_state_offset + 1, 0);
2576 if (isinclass)
2577 {
2578 if (*ecode == OP_CRPOSSTAR)
2579 {
2580 active_count--; /* Remove non-match possibility */
2581 next_active_state--;
2582 }
2583 ADD_NEW(state_offset, 0);
2584 }
2585 break;
2586
2587 case OP_CRPLUS:
2588 case OP_CRMINPLUS:
2589 case OP_CRPOSPLUS:
2590 count = current_state->count; /* Already matched */
2591 if (count > 0) { ADD_ACTIVE(next_state_offset + 1, 0); }
2592 if (isinclass)
2593 {
2594 if (count > 0 && *ecode == OP_CRPOSPLUS)
2595 {
2596 active_count--; /* Remove non-match possibility */
2597 next_active_state--;
2598 }
2599 count++;
2600 ADD_NEW(state_offset, count);
2601 }
2602 break;
2603
2604 case OP_CRQUERY:
2605 case OP_CRMINQUERY:
2606 case OP_CRPOSQUERY:
2607 ADD_ACTIVE(next_state_offset + 1, 0);
2608 if (isinclass)
2609 {
2610 if (*ecode == OP_CRPOSQUERY)
2611 {
2612 active_count--; /* Remove non-match possibility */
2613 next_active_state--;
2614 }
2615 ADD_NEW(next_state_offset + 1, 0);
2616 }
2617 break;
2618
2619 case OP_CRRANGE:
2620 case OP_CRMINRANGE:
2621 case OP_CRPOSRANGE:
2622 count = current_state->count; /* Already matched */
2623 if (count >= (int)GET2(ecode, 1))
2624 { ADD_ACTIVE(next_state_offset + 1 + 2 * IMM2_SIZE, 0); }
2625 if (isinclass)
2626 {
2627 int max = (int)GET2(ecode, 1 + IMM2_SIZE);
2628 if (*ecode == OP_CRPOSRANGE)
2629 {
2630 active_count--; /* Remove non-match possibility */
2631 next_active_state--;
2632 }
2633 if (++count >= max && max != 0) /* Max 0 => no limit */
2634 { ADD_NEW(next_state_offset + 1 + 2 * IMM2_SIZE, 0); }
2635 else
2636 { ADD_NEW(state_offset, count); }
2637 }
2638 break;
2639
2640 default:
2641 if (isinclass) { ADD_NEW(next_state_offset, 0); }
2642 break;
2643 }
2644 }
2645 break;
2646
2647 /* ========================================================================== */
2648 /* These are the opcodes for fancy brackets of various kinds. We have
2649 to use recursion in order to handle them. The "always failing" assertion
2650 (?!) is optimised to OP_FAIL when compiling, so we have to support that,
2651 though the other "backtracking verbs" are not supported. */
2652
2653 case OP_FAIL:
2654 forced_fail++; /* Count FAILs for multiple states */
2655 break;
2656
2657 case OP_ASSERT:
2658 case OP_ASSERT_NOT:
2659 case OP_ASSERTBACK:
2660 case OP_ASSERTBACK_NOT:
2661 {
2662 int rc;
2663 int local_offsets[2];
2664 int local_workspace[1000];
2665 const pcre_uchar *endasscode = code + GET(code, 1);
2666
2667 while (*endasscode == OP_ALT) endasscode += GET(endasscode, 1);
2668
2669 rc = internal_dfa_exec(
2670 md, /* static match data */
2671 code, /* this subexpression's code */
2672 ptr, /* where we currently are */
2673 (int)(ptr - start_subject), /* start offset */
2674 local_offsets, /* offset vector */
2675 sizeof(local_offsets)/sizeof(int), /* size of same */
2676 local_workspace, /* workspace vector */
2677 sizeof(local_workspace)/sizeof(int), /* size of same */
2678 rlevel); /* function recursion level */
2679
2680 if (rc == PCRE_ERROR_DFA_UITEM) return rc;
2681 if ((rc >= 0) == (codevalue == OP_ASSERT || codevalue == OP_ASSERTBACK))
2682 { ADD_ACTIVE((int)(endasscode + LINK_SIZE + 1 - start_code), 0); }
2683 }
2684 break;
2685
2686 /*-----------------------------------------------------------------*/
2687 case OP_COND:
2688 case OP_SCOND:
2689 {
2690 int local_offsets[1000];
2691 int local_workspace[1000];
2692 int codelink = GET(code, 1);
2693 int condcode;
2694
2695 /* Because of the way auto-callout works during compile, a callout item
2696 is inserted between OP_COND and an assertion condition. This does not
2697 happen for the other conditions. */
2698
2699 if (code[LINK_SIZE+1] == OP_CALLOUT)
2700 {
2701 rrc = 0;
2702 if (PUBL(callout) != NULL)
2703 {
2704 PUBL(callout_block) cb;
2705 cb.version = 1; /* Version 1 of the callout block */
2706 cb.callout_number = code[LINK_SIZE+2];
2707 cb.offset_vector = offsets;
2708 #if defined COMPILE_PCRE8
2709 cb.subject = (PCRE_SPTR)start_subject;
2710 #elif defined COMPILE_PCRE16
2711 cb.subject = (PCRE_SPTR16)start_subject;
2712 #elif defined COMPILE_PCRE32
2713 cb.subject = (PCRE_SPTR32)start_subject;
2714 #endif
2715 cb.subject_length = (int)(end_subject - start_subject);
2716 cb.start_match = (int)(current_subject - start_subject);
2717 cb.current_position = (int)(ptr - start_subject);
2718 cb.pattern_position = GET(code, LINK_SIZE + 3);
2719 cb.next_item_length = GET(code, 3 + 2*LINK_SIZE);
2720 cb.capture_top = 1;
2721 cb.capture_last = -1;
2722 cb.callout_data = md->callout_data;
2723 cb.mark = NULL; /* No (*MARK) support */
2724 if ((rrc = (*PUBL(callout))(&cb)) < 0) return rrc; /* Abandon */
2725 }
2726 if (rrc > 0) break; /* Fail this thread */
2727 code += PRIV(OP_lengths)[OP_CALLOUT]; /* Skip callout data */
2728 }
2729
2730 condcode = code[LINK_SIZE+1];
2731
2732 /* Back reference conditions and duplicate named recursion conditions
2733 are not supported */
2734
2735 if (condcode == OP_CREF || condcode == OP_DNCREF ||
2736 condcode == OP_DNRREF)
2737 return PCRE_ERROR_DFA_UCOND;
2738
2739 /* The DEFINE condition is always false, and the assertion (?!) is
2740 converted to OP_FAIL. */
2741
2742 if (condcode == OP_DEF || condcode == OP_FAIL)
2743 { ADD_ACTIVE(state_offset + codelink + LINK_SIZE + 1, 0); }
2744
2745 /* The only supported version of OP_RREF is for the value RREF_ANY,
2746 which means "test if in any recursion". We can't test for specifically
2747 recursed groups. */
2748
2749 else if (condcode == OP_RREF)
2750 {
2751 int value = GET2(code, LINK_SIZE + 2);
2752 if (value != RREF_ANY) return PCRE_ERROR_DFA_UCOND;
2753 if (md->recursive != NULL)
2754 { ADD_ACTIVE(state_offset + LINK_SIZE + 2 + IMM2_SIZE, 0); }
2755 else { ADD_ACTIVE(state_offset + codelink + LINK_SIZE + 1, 0); }
2756 }
2757
2758 /* Otherwise, the condition is an assertion */
2759
2760 else
2761 {
2762 int rc;
2763 const pcre_uchar *asscode = code + LINK_SIZE + 1;
2764 const pcre_uchar *endasscode = asscode + GET(asscode, 1);
2765
2766 while (*endasscode == OP_ALT) endasscode += GET(endasscode, 1);
2767
2768 rc = internal_dfa_exec(
2769 md, /* fixed match data */
2770 asscode, /* this subexpression's code */
2771 ptr, /* where we currently are */
2772 (int)(ptr - start_subject), /* start offset */
2773 local_offsets, /* offset vector */
2774 sizeof(local_offsets)/sizeof(int), /* size of same */
2775 local_workspace, /* workspace vector */
2776 sizeof(local_workspace)/sizeof(int), /* size of same */
2777 rlevel); /* function recursion level */
2778
2779 if (rc == PCRE_ERROR_DFA_UITEM) return rc;
2780 if ((rc >= 0) ==
2781 (condcode == OP_ASSERT || condcode == OP_ASSERTBACK))
2782 { ADD_ACTIVE((int)(endasscode + LINK_SIZE + 1 - start_code), 0); }
2783 else
2784 { ADD_ACTIVE(state_offset + codelink + LINK_SIZE + 1, 0); }
2785 }
2786 }
2787 break;
2788
2789 /*-----------------------------------------------------------------*/
2790 case OP_RECURSE:
2791 {
2792 dfa_recursion_info *ri;
2793 int local_offsets[1000];
2794 int local_workspace[1000];
2795 const pcre_uchar *callpat = start_code + GET(code, 1);
2796 int recno = (callpat == md->start_code)? 0 :
2797 GET2(callpat, 1 + LINK_SIZE);
2798 int rc;
2799
2800 DPRINTF(("%.*sStarting regex recursion\n", rlevel*2-2, SP));
2801
2802 /* Check for repeating a recursion without advancing the subject
2803 pointer. This should catch convoluted mutual recursions. (Some simple
2804 cases are caught at compile time.) */
2805
2806 for (ri = md->recursive; ri != NULL; ri = ri->prevrec)
2807 if (recno == ri->group_num && ptr == ri->subject_position)
2808 return PCRE_ERROR_RECURSELOOP;
2809
2810 /* Remember this recursion and where we started it so as to
2811 catch infinite loops. */
2812
2813 new_recursive.group_num = recno;
2814 new_recursive.subject_position = ptr;
2815 new_recursive.prevrec = md->recursive;
2816 md->recursive = &new_recursive;
2817
2818 rc = internal_dfa_exec(
2819 md, /* fixed match data */
2820 callpat, /* this subexpression's code */
2821 ptr, /* where we currently are */
2822 (int)(ptr - start_subject), /* start offset */
2823 local_offsets, /* offset vector */
2824 sizeof(local_offsets)/sizeof(int), /* size of same */
2825 local_workspace, /* workspace vector */
2826 sizeof(local_workspace)/sizeof(int), /* size of same */
2827 rlevel); /* function recursion level */
2828
2829 md->recursive = new_recursive.prevrec; /* Done this recursion */
2830
2831 DPRINTF(("%.*sReturn from regex recursion: rc=%d\n", rlevel*2-2, SP,
2832 rc));
2833
2834 /* Ran out of internal offsets */
2835
2836 if (rc == 0) return PCRE_ERROR_DFA_RECURSE;
2837
2838 /* For each successful matched substring, set up the next state with a
2839 count of characters to skip before trying it. Note that the count is in
2840 characters, not bytes. */
2841
2842 if (rc > 0)
2843 {
2844 for (rc = rc*2 - 2; rc >= 0; rc -= 2)
2845 {
2846 int charcount = local_offsets[rc+1] - local_offsets[rc];
2847 #if defined SUPPORT_UTF && !defined COMPILE_PCRE32
2848 if (utf)
2849 {
2850 const pcre_uchar *p = start_subject + local_offsets[rc];
2851 const pcre_uchar *pp = start_subject + local_offsets[rc+1];
2852 while (p < pp) if (NOT_FIRSTCHAR(*p++)) charcount--;
2853 }
2854 #endif
2855 if (charcount > 0)
2856 {
2857 ADD_NEW_DATA(-(state_offset + LINK_SIZE + 1), 0, (charcount - 1));
2858 }
2859 else
2860 {
2861 ADD_ACTIVE(state_offset + LINK_SIZE + 1, 0);
2862 }
2863 }
2864 }
2865 else if (rc != PCRE_ERROR_NOMATCH) return rc;
2866 }
2867 break;
2868
2869 /*-----------------------------------------------------------------*/
2870 case OP_BRAPOS:
2871 case OP_SBRAPOS:
2872 case OP_CBRAPOS:
2873 case OP_SCBRAPOS:
2874 case OP_BRAPOSZERO:
2875 {
2876 int charcount, matched_count;
2877 const pcre_uchar *local_ptr = ptr;
2878 BOOL allow_zero;
2879
2880 if (codevalue == OP_BRAPOSZERO)
2881 {
2882 allow_zero = TRUE;
2883 codevalue = *(++code); /* Codevalue will be one of above BRAs */
2884 }
2885 else allow_zero = FALSE;
2886
2887 /* Loop to match the subpattern as many times as possible as if it were
2888 a complete pattern. */
2889
2890 for (matched_count = 0;; matched_count++)
2891 {
2892 int local_offsets[2];
2893 int local_workspace[1000];
2894
2895 int rc = internal_dfa_exec(
2896 md, /* fixed match data */
2897 code, /* this subexpression's code */
2898 local_ptr, /* where we currently are */
2899 (int)(ptr - start_subject), /* start offset */
2900 local_offsets, /* offset vector */
2901 sizeof(local_offsets)/sizeof(int), /* size of same */
2902 local_workspace, /* workspace vector */
2903 sizeof(local_workspace)/sizeof(int), /* size of same */
2904 rlevel); /* function recursion level */
2905
2906 /* Failed to match */
2907
2908 if (rc < 0)
2909 {
2910 if (rc != PCRE_ERROR_NOMATCH) return rc;
2911 break;
2912 }
2913
2914 /* Matched: break the loop if zero characters matched. */
2915
2916 charcount = local_offsets[1] - local_offsets[0];
2917 if (charcount == 0) break;
2918 local_ptr += charcount; /* Advance temporary position ptr */
2919 }
2920
2921 /* At this point we have matched the subpattern matched_count
2922 times, and local_ptr is pointing to the character after the end of the
2923 last match. */
2924
2925 if (matched_count > 0 || allow_zero)
2926 {
2927 const pcre_uchar *end_subpattern = code;
2928 int next_state_offset;
2929
2930 do { end_subpattern += GET(end_subpattern, 1); }
2931 while (*end_subpattern == OP_ALT);
2932 next_state_offset =
2933 (int)(end_subpattern - start_code + LINK_SIZE + 1);
2934
2935 /* Optimization: if there are no more active states, and there
2936 are no new states yet set up, then skip over the subject string
2937 right here, to save looping. Otherwise, set up the new state to swing
2938 into action when the end of the matched substring is reached. */
2939
2940 if (i + 1 >= active_count && new_count == 0)
2941 {
2942 ptr = local_ptr;
2943 clen = 0;
2944 ADD_NEW(next_state_offset, 0);
2945 }
2946 else
2947 {
2948 const pcre_uchar *p = ptr;
2949 const pcre_uchar *pp = local_ptr;
2950 charcount = (int)(pp - p);
2951 #if defined SUPPORT_UTF && !defined COMPILE_PCRE32
2952 if (utf) while (p < pp) if (NOT_FIRSTCHAR(*p++)) charcount--;
2953 #endif
2954 ADD_NEW_DATA(-next_state_offset, 0, (charcount - 1));
2955 }
2956 }
2957 }
2958 break;
2959
2960 /*-----------------------------------------------------------------*/
2961 case OP_ONCE:
2962 case OP_ONCE_NC:
2963 {
2964 int local_offsets[2];
2965 int local_workspace[1000];
2966
2967 int rc = internal_dfa_exec(
2968 md, /* fixed match data */
2969 code, /* this subexpression's code */
2970 ptr, /* where we currently are */
2971 (int)(ptr - start_subject), /* start offset */
2972 local_offsets, /* offset vector */
2973 sizeof(local_offsets)/sizeof(int), /* size of same */
2974 local_workspace, /* workspace vector */
2975 sizeof(local_workspace)/sizeof(int), /* size of same */
2976 rlevel); /* function recursion level */
2977
2978 if (rc >= 0)
2979 {
2980 const pcre_uchar *end_subpattern = code;
2981 int charcount = local_offsets[1] - local_offsets[0];
2982 int next_state_offset, repeat_state_offset;
2983
2984 do { end_subpattern += GET(end_subpattern, 1); }
2985 while (*end_subpattern == OP_ALT);
2986 next_state_offset =
2987 (int)(end_subpattern - start_code + LINK_SIZE + 1);
2988
2989 /* If the end of this subpattern is KETRMAX or KETRMIN, we must
2990 arrange for the repeat state also to be added to the relevant list.
2991 Calculate the offset, or set -1 for no repeat. */
2992
2993 repeat_state_offset = (*end_subpattern == OP_KETRMAX ||
2994 *end_subpattern == OP_KETRMIN)?
2995 (int)(end_subpattern - start_code - GET(end_subpattern, 1)) : -1;
2996
2997 /* If we have matched an empty string, add the next state at the
2998 current character pointer. This is important so that the duplicate
2999 checking kicks in, which is what breaks infinite loops that match an
3000 empty string. */
3001
3002 if (charcount == 0)
3003 {
3004 ADD_ACTIVE(next_state_offset, 0);
3005 }
3006
3007 /* Optimization: if there are no more active states, and there
3008 are no new states yet set up, then skip over the subject string
3009 right here, to save looping. Otherwise, set up the new state to swing
3010 into action when the end of the matched substring is reached. */
3011
3012 else if (i + 1 >= active_count && new_count == 0)
3013 {
3014 ptr += charcount;
3015 clen = 0;
3016 ADD_NEW(next_state_offset, 0);
3017
3018 /* If we are adding a repeat state at the new character position,
3019 we must fudge things so that it is the only current state.
3020 Otherwise, it might be a duplicate of one we processed before, and
3021 that would cause it to be skipped. */
3022
3023 if (repeat_state_offset >= 0)
3024 {
3025 next_active_state = active_states;
3026 active_count = 0;
3027 i = -1;
3028 ADD_ACTIVE(repeat_state_offset, 0);
3029 }
3030 }
3031 else
3032 {
3033 #if defined SUPPORT_UTF && !defined COMPILE_PCRE32
3034 if (utf)
3035 {
3036 const pcre_uchar *p = start_subject + local_offsets[0];
3037 const pcre_uchar *pp = start_subject + local_offsets[1];
3038 while (p < pp) if (NOT_FIRSTCHAR(*p++)) charcount--;
3039 }
3040 #endif
3041 ADD_NEW_DATA(-next_state_offset, 0, (charcount - 1));
3042 if (repeat_state_offset >= 0)
3043 { ADD_NEW_DATA(-repeat_state_offset, 0, (charcount - 1)); }
3044 }
3045 }
3046 else if (rc != PCRE_ERROR_NOMATCH) return rc;
3047 }
3048 break;
3049
3050
3051 /* ========================================================================== */
3052 /* Handle callouts */
3053
3054 case OP_CALLOUT:
3055 rrc = 0;
3056 if (PUBL(callout) != NULL)
3057 {
3058 PUBL(callout_block) cb;
3059 cb.version = 1; /* Version 1 of the callout block */
3060 cb.callout_number = code[1];
3061 cb.offset_vector = offsets;
3062 #if defined COMPILE_PCRE8
3063 cb.subject = (PCRE_SPTR)start_subject;
3064 #elif defined COMPILE_PCRE16
3065 cb.subject = (PCRE_SPTR16)start_subject;
3066 #elif defined COMPILE_PCRE32
3067 cb.subject = (PCRE_SPTR32)start_subject;
3068 #endif
3069 cb.subject_length = (int)(end_subject - start_subject);
3070 cb.start_match = (int)(current_subject - start_subject);
3071 cb.current_position = (int)(ptr - start_subject);
3072 cb.pattern_position = GET(code, 2);
3073 cb.next_item_length = GET(code, 2 + LINK_SIZE);
3074 cb.capture_top = 1;
3075 cb.capture_last = -1;
3076 cb.callout_data = md->callout_data;
3077 cb.mark = NULL; /* No (*MARK) support */
3078 if ((rrc = (*PUBL(callout))(&cb)) < 0) return rrc; /* Abandon */
3079 }
3080 if (rrc == 0)
3081 { ADD_ACTIVE(state_offset + PRIV(OP_lengths)[OP_CALLOUT], 0); }
3082 break;
3083
3084
3085 /* ========================================================================== */
3086 default: /* Unsupported opcode */
3087 return PCRE_ERROR_DFA_UITEM;
3088 }
3089
3090 NEXT_ACTIVE_STATE: continue;
3091
3092 } /* End of loop scanning active states */
3093
3094 /* We have finished the processing at the current subject character. If no
3095 new states have been set for the next character, we have found all the
3096 matches that we are going to find. If we are at the top level and partial
3097 matching has been requested, check for appropriate conditions.
3098
3099 The "forced_ fail" variable counts the number of (*F) encountered for the
3100 character. If it is equal to the original active_count (saved in
3101 workspace[1]) it means that (*F) was found on every active state. In this
3102 case we don't want to give a partial match.
3103
3104 The "could_continue" variable is true if a state could have continued but
3105 for the fact that the end of the subject was reached. */
3106
3107 if (new_count <= 0)
3108 {
3109 if (rlevel == 1 && /* Top level, and */
3110 could_continue && /* Some could go on, and */
3111 forced_fail != workspace[1] && /* Not all forced fail & */
3112 ( /* either... */
3113 (md->moptions & PCRE_PARTIAL_HARD) != 0 /* Hard partial */
3114 || /* or... */
3115 ((md->moptions & PCRE_PARTIAL_SOFT) != 0 && /* Soft partial and */
3116 match_count < 0) /* no matches */
3117 ) && /* And... */
3118 (
3119 partial_newline || /* Either partial NL */
3120 ( /* or ... */
3121 ptr >= end_subject && /* End of subject and */
3122 ptr > md->start_used_ptr) /* Inspected non-empty string */
3123 )
3124 )
3125 match_count = PCRE_ERROR_PARTIAL;
3126 DPRINTF(("%.*sEnd of internal_dfa_exec %d: returning %d\n"
3127 "%.*s---------------------\n\n", rlevel*2-2, SP, rlevel, match_count,
3128 rlevel*2-2, SP));
3129 break; /* In effect, "return", but see the comment below */
3130 }
3131
3132 /* One or more states are active for the next character. */
3133
3134 ptr += clen; /* Advance to next subject character */
3135 } /* Loop to move along the subject string */
3136
3137 /* Control gets here from "break" a few lines above. We do it this way because
3138 if we use "return" above, we have compiler trouble. Some compilers warn if
3139 there's nothing here because they think the function doesn't return a value. On
3140 the other hand, if we put a dummy statement here, some more clever compilers
3141 complain that it can't be reached. Sigh. */
3142
3143 return match_count;
3144 }
3145
3146
3147
3148
3149 /*************************************************
3150 * Execute a Regular Expression - DFA engine *
3151 *************************************************/
3152
3153 /* This external function applies a compiled re to a subject string using a DFA
3154 engine. This function calls the internal function multiple times if the pattern
3155 is not anchored.
3156
3157 Arguments:
3158 argument_re points to the compiled expression
3159 extra_data points to extra data or is NULL
3160 subject points to the subject string
3161 length length of subject string (may contain binary zeros)
3162 start_offset where to start in the subject string
3163 options option bits
3164 offsets vector of match offsets
3165 offsetcount size of same
3166 workspace workspace vector
3167 wscount size of same
3168
3169 Returns: > 0 => number of match offset pairs placed in offsets
3170 = 0 => offsets overflowed; longest matches are present
3171 -1 => failed to match
3172 < -1 => some kind of unexpected problem
3173 */
3174
3175 #if defined COMPILE_PCRE8
3176 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
3177 pcre_dfa_exec(const pcre *argument_re, const pcre_extra *extra_data,
3178 const char *subject, int length, int start_offset, int options, int *offsets,
3179 int offsetcount, int *workspace, int wscount)
3180 #elif defined COMPILE_PCRE16
3181 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
3182 pcre16_dfa_exec(const pcre16 *argument_re, const pcre16_extra *extra_data,
3183 PCRE_SPTR16 subject, int length, int start_offset, int options, int *offsets,
3184 int offsetcount, int *workspace, int wscount)
3185 #elif defined COMPILE_PCRE32
3186 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
3187 pcre32_dfa_exec(const pcre32 *argument_re, const pcre32_extra *extra_data,
3188 PCRE_SPTR32 subject, int length, int start_offset, int options, int *offsets,
3189 int offsetcount, int *workspace, int wscount)
3190 #endif
3191 {
3192 REAL_PCRE *re = (REAL_PCRE *)argument_re;
3193 dfa_match_data match_block;
3194 dfa_match_data *md = &match_block;
3195 BOOL utf, anchored, startline, firstline;
3196 const pcre_uchar *current_subject, *end_subject;
3197 const pcre_study_data *study = NULL;
3198
3199 const pcre_uchar *req_char_ptr;
3200 const pcre_uint8 *start_bits = NULL;
3201 BOOL has_first_char = FALSE;
3202 BOOL has_req_char = FALSE;
3203 pcre_uchar first_char = 0;
3204 pcre_uchar first_char2 = 0;
3205 pcre_uchar req_char = 0;
3206 pcre_uchar req_char2 = 0;
3207 int newline;
3208
3209 /* Plausibility checks */
3210
3211 if ((options & ~PUBLIC_DFA_EXEC_OPTIONS) != 0) return PCRE_ERROR_BADOPTION;
3212 if (re == NULL || subject == NULL || workspace == NULL ||
3213 (offsets == NULL && offsetcount > 0)) return PCRE_ERROR_NULL;
3214 if (offsetcount < 0) return PCRE_ERROR_BADCOUNT;
3215 if (wscount < 20) return PCRE_ERROR_DFA_WSSIZE;
3216 if (length < 0) return PCRE_ERROR_BADLENGTH;
3217 if (start_offset < 0 || start_offset > length) return PCRE_ERROR_BADOFFSET;
3218
3219 /* Check that the first field in the block is the magic number. If it is not,
3220 return with PCRE_ERROR_BADMAGIC. However, if the magic number is equal to
3221 REVERSED_MAGIC_NUMBER we return with PCRE_ERROR_BADENDIANNESS, which
3222 means that the pattern is likely compiled with different endianness. */
3223
3224 if (re->magic_number != MAGIC_NUMBER)
3225 return re->magic_number == REVERSED_MAGIC_NUMBER?
3226 PCRE_ERROR_BADENDIANNESS:PCRE_ERROR_BADMAGIC;
3227 if ((re->flags & PCRE_MODE) == 0) return PCRE_ERROR_BADMODE;
3228
3229 /* If restarting after a partial match, do some sanity checks on the contents
3230 of the workspace. */
3231
3232 if ((options & PCRE_DFA_RESTART) != 0)
3233 {
3234 if ((workspace[0] & (-2)) != 0 || workspace[1] < 1 ||
3235 workspace[1] > (wscount - 2)/INTS_PER_STATEBLOCK)
3236 return PCRE_ERROR_DFA_BADRESTART;
3237 }
3238
3239 /* Set up study, callout, and table data */
3240
3241 md->tables = re->tables;
3242 md->callout_data = NULL;
3243
3244 if (extra_data != NULL)
3245 {
3246 unsigned long int flags = extra_data->flags;
3247 if ((flags & PCRE_EXTRA_STUDY_DATA) != 0)
3248 study = (const pcre_study_data *)extra_data->study_data;
3249 if ((flags & PCRE_EXTRA_MATCH_LIMIT) != 0) return PCRE_ERROR_DFA_UMLIMIT;
3250 if ((flags & PCRE_EXTRA_MATCH_LIMIT_RECURSION) != 0)
3251 return PCRE_ERROR_DFA_UMLIMIT;
3252 if ((flags & PCRE_EXTRA_CALLOUT_DATA) != 0)
3253 md->callout_data = extra_data->callout_data;
3254 if ((flags & PCRE_EXTRA_TABLES) != 0)
3255 md->tables = extra_data->tables;
3256 }
3257
3258 /* Set some local values */
3259
3260 current_subject = (const pcre_uchar *)subject + start_offset;
3261 end_subject = (const pcre_uchar *)subject + length;
3262 req_char_ptr = current_subject - 1;
3263
3264 #ifdef SUPPORT_UTF
3265 /* PCRE_UTF(16|32) have the same value as PCRE_UTF8. */
3266 utf = (re->options & PCRE_UTF8) != 0;
3267 #else
3268 utf = FALSE;
3269 #endif
3270
3271 anchored = (options & (PCRE_ANCHORED|PCRE_DFA_RESTART)) != 0 ||
3272 (re->options & PCRE_ANCHORED) != 0;
3273
3274 /* The remaining fixed data for passing around. */
3275
3276 md->start_code = (const pcre_uchar *)argument_re +
3277 re->name_table_offset + re->name_count * re->name_entry_size;
3278 md->start_subject = (const pcre_uchar *)subject;
3279 md->end_subject = end_subject;
3280 md->start_offset = start_offset;
3281 md->moptions = options;
3282 md->poptions = re->options;
3283
3284 /* If the BSR option is not set at match time, copy what was set
3285 at compile time. */
3286
3287 if ((md->moptions & (PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE)) == 0)
3288 {
3289 if ((re->options & (PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE)) != 0)
3290 md->moptions |= re->options & (PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE);
3291 #ifdef BSR_ANYCRLF
3292 else md->moptions |= PCRE_BSR_ANYCRLF;
3293 #endif
3294 }
3295
3296 /* Handle different types of newline. The three bits give eight cases. If
3297 nothing is set at run time, whatever was used at compile time applies. */
3298
3299 switch ((((options & PCRE_NEWLINE_BITS) == 0)? re->options : (pcre_uint32)options) &
3300 PCRE_NEWLINE_BITS)
3301 {
3302 case 0: newline = NEWLINE; break; /* Compile-time default */
3303 case PCRE_NEWLINE_CR: newline = CHAR_CR; break;
3304 case PCRE_NEWLINE_LF: newline = CHAR_NL; break;
3305 case PCRE_NEWLINE_CR+
3306 PCRE_NEWLINE_LF: newline = (CHAR_CR << 8) | CHAR_NL; break;
3307 case PCRE_NEWLINE_ANY: newline = -1; break;
3308 case PCRE_NEWLINE_ANYCRLF: newline = -2; break;
3309 default: return PCRE_ERROR_BADNEWLINE;
3310 }
3311
3312 if (newline == -2)
3313 {
3314 md->nltype = NLTYPE_ANYCRLF;
3315 }
3316 else if (newline < 0)
3317 {
3318 md->nltype = NLTYPE_ANY;
3319 }
3320 else
3321 {
3322 md->nltype = NLTYPE_FIXED;
3323 if (newline > 255)
3324 {
3325 md->nllen = 2;
3326 md->nl[0] = (newline >> 8) & 255;
3327 md->nl[1] = newline & 255;
3328 }
3329 else
3330 {
3331 md->nllen = 1;
3332 md->nl[0] = newline;
3333 }
3334 }
3335
3336 /* Check a UTF-8 string if required. Unfortunately there's no way of passing
3337 back the character offset. */
3338
3339 #ifdef SUPPORT_UTF
3340 if (utf && (options & PCRE_NO_UTF8_CHECK) == 0)
3341 {
3342 int erroroffset;
3343 int errorcode = PRIV(valid_utf)((pcre_uchar *)subject, length, &erroroffset);
3344 if (errorcode != 0)
3345 {
3346 if (offsetcount >= 2)
3347 {
3348 offsets[0] = erroroffset;
3349 offsets[1] = errorcode;
3350 }
3351 #if defined COMPILE_PCRE8
3352 return (errorcode <= PCRE_UTF8_ERR5 && (options & PCRE_PARTIAL_HARD) != 0) ?
3353 PCRE_ERROR_SHORTUTF8 : PCRE_ERROR_BADUTF8;
3354 #elif defined COMPILE_PCRE16
3355 return (errorcode <= PCRE_UTF16_ERR1 && (options & PCRE_PARTIAL_HARD) != 0) ?
3356 PCRE_ERROR_SHORTUTF16 : PCRE_ERROR_BADUTF16;
3357 #elif defined COMPILE_PCRE32
3358 return PCRE_ERROR_BADUTF32;
3359 #endif
3360 }
3361 #if defined COMPILE_PCRE8 || defined COMPILE_PCRE16
3362 if (start_offset > 0 && start_offset < length &&
3363 NOT_FIRSTCHAR(((PCRE_PUCHAR)subject)[start_offset]))
3364 return PCRE_ERROR_BADUTF8_OFFSET;
3365 #endif
3366 }
3367 #endif
3368
3369 /* If the exec call supplied NULL for tables, use the inbuilt ones. This
3370 is a feature that makes it possible to save compiled regex and re-use them
3371 in other programs later. */
3372
3373 if (md->tables == NULL) md->tables = PRIV(default_tables);
3374
3375 /* The "must be at the start of a line" flags are used in a loop when finding
3376 where to start. */
3377
3378 startline = (re->flags & PCRE_STARTLINE) != 0;
3379 firstline = (re->options & PCRE_FIRSTLINE) != 0;
3380
3381 /* Set up the first character to match, if available. The first_byte value is
3382 never set for an anchored regular expression, but the anchoring may be forced
3383 at run time, so we have to test for anchoring. The first char may be unset for
3384 an unanchored pattern, of course. If there's no first char and the pattern was
3385 studied, there may be a bitmap of possible first characters. */
3386
3387 if (!anchored)
3388 {
3389 if ((re->flags & PCRE_FIRSTSET) != 0)
3390 {
3391 has_first_char = TRUE;
3392 first_char = first_char2 = (pcre_uchar)(re->first_char);
3393 if ((re->flags & PCRE_FCH_CASELESS) != 0)
3394 {
3395 first_char2 = TABLE_GET(first_char, md->tables + fcc_offset, first_char);
3396 #if defined SUPPORT_UCP && !(defined COMPILE_PCRE8)
3397 if (utf && first_char > 127)
3398 first_char2 = UCD_OTHERCASE(first_char);
3399 #endif
3400 }
3401 }
3402 else
3403 {
3404 if (!startline && study != NULL &&
3405 (study->flags & PCRE_STUDY_MAPPED) != 0)
3406 start_bits = study->start_bits;
3407 }
3408 }
3409
3410 /* For anchored or unanchored matches, there may be a "last known required
3411 character" set. */
3412
3413 if ((re->flags & PCRE_REQCHSET) != 0)
3414 {
3415 has_req_char = TRUE;
3416 req_char = req_char2 = (pcre_uchar)(re->req_char);
3417 if ((re->flags & PCRE_RCH_CASELESS) != 0)
3418 {
3419 req_char2 = TABLE_GET(req_char, md->tables + fcc_offset, req_char);
3420 #if defined SUPPORT_UCP && !(defined COMPILE_PCRE8)
3421 if (utf && req_char > 127)
3422 req_char2 = UCD_OTHERCASE(req_char);
3423 #endif
3424 }
3425 }
3426
3427 /* Call the main matching function, looping for a non-anchored regex after a
3428 failed match. If not restarting, perform certain optimizations at the start of
3429 a match. */
3430
3431 for (;;)
3432 {
3433 int rc;
3434
3435 if ((options & PCRE_DFA_RESTART) == 0)
3436 {
3437 const pcre_uchar *save_end_subject = end_subject;
3438
3439 /* If firstline is TRUE, the start of the match is constrained to the first
3440 line of a multiline string. Implement this by temporarily adjusting
3441 end_subject so that we stop scanning at a newline. If the match fails at
3442 the newline, later code breaks this loop. */
3443
3444 if (firstline)
3445 {
3446 PCRE_PUCHAR t = current_subject;
3447 #ifdef SUPPORT_UTF
3448 if (utf)
3449 {
3450 while (t < md->end_subject && !IS_NEWLINE(t))
3451 {
3452 t++;
3453 ACROSSCHAR(t < end_subject, *t, t++);
3454 }
3455 }
3456 else
3457 #endif
3458 while (t < md->end_subject && !IS_NEWLINE(t)) t++;
3459 end_subject = t;
3460 }
3461
3462 /* There are some optimizations that avoid running the match if a known
3463 starting point is not found. However, there is an option that disables
3464 these, for testing and for ensuring that all callouts do actually occur.
3465 The option can be set in the regex by (*NO_START_OPT) or passed in
3466 match-time options. */
3467
3468 if (((options | re->options) & PCRE_NO_START_OPTIMIZE) == 0)
3469 {
3470 /* Advance to a known first pcre_uchar (i.e. data item) */
3471
3472 if (has_first_char)
3473 {
3474 if (first_char != first_char2)
3475 {
3476 pcre_uchar csc;
3477 while (current_subject < end_subject &&
3478 (csc = UCHAR21TEST(current_subject)) != first_char && csc != first_char2)
3479 current_subject++;
3480 }
3481 else
3482 while (current_subject < end_subject &&
3483 UCHAR21TEST(current_subject) != first_char)
3484 current_subject++;
3485 }
3486
3487 /* Or to just after a linebreak for a multiline match if possible */
3488
3489 else if (startline)
3490 {
3491 if (current_subject > md->start_subject + start_offset)
3492 {
3493 #ifdef SUPPORT_UTF
3494 if (utf)
3495 {
3496 while (current_subject < end_subject &&
3497 !WAS_NEWLINE(current_subject))
3498 {
3499 current_subject++;
3500 ACROSSCHAR(current_subject < end_subject, *current_subject,
3501 current_subject++);
3502 }
3503 }
3504 else
3505 #endif
3506 while (current_subject < end_subject && !WAS_NEWLINE(current_subject))
3507 current_subject++;
3508
3509 /* If we have just passed a CR and the newline option is ANY or
3510 ANYCRLF, and we are now at a LF, advance the match position by one
3511 more character. */
3512
3513 if (UCHAR21TEST(current_subject - 1) == CHAR_CR &&
3514 (md->nltype == NLTYPE_ANY || md->nltype == NLTYPE_ANYCRLF) &&
3515 current_subject < end_subject &&
3516 UCHAR21TEST(current_subject) == CHAR_NL)
3517 current_subject++;
3518 }
3519 }
3520
3521 /* Advance to a non-unique first pcre_uchar after study */
3522
3523 else if (start_bits != NULL)
3524 {
3525 while (current_subject < end_subject)
3526 {
3527 register pcre_uint32 c = UCHAR21TEST(current_subject);
3528 #ifndef COMPILE_PCRE8
3529 if (c > 255) c = 255;
3530 #endif
3531 if ((start_bits[c/8] & (1 << (c&7))) != 0) break;
3532 current_subject++;
3533 }
3534 }
3535 }
3536
3537 /* Restore fudged end_subject */
3538
3539 end_subject = save_end_subject;
3540
3541 /* The following two optimizations are disabled for partial matching or if
3542 disabling is explicitly requested (and of course, by the test above, this
3543 code is not obeyed when restarting after a partial match). */
3544
3545 if (((options | re->options) & PCRE_NO_START_OPTIMIZE) == 0 &&
3546 (options & (PCRE_PARTIAL_HARD|PCRE_PARTIAL_SOFT)) == 0)
3547 {
3548 /* If the pattern was studied, a minimum subject length may be set. This
3549 is a lower bound; no actual string of that length may actually match the
3550 pattern. Although the value is, strictly, in characters, we treat it as
3551 in pcre_uchar units to avoid spending too much time in this optimization.
3552 */
3553
3554 if (study != NULL && (study->flags & PCRE_STUDY_MINLEN) != 0 &&
3555 (pcre_uint32)(end_subject - current_subject) < study->minlength)
3556 return PCRE_ERROR_NOMATCH;
3557
3558 /* If req_char is set, we know that that pcre_uchar must appear in the
3559 subject for the match to succeed. If the first pcre_uchar is set,
3560 req_char must be later in the subject; otherwise the test starts at the
3561 match point. This optimization can save a huge amount of work in patterns
3562 with nested unlimited repeats that aren't going to match. Writing
3563 separate code for cased/caseless versions makes it go faster, as does
3564 using an autoincrement and backing off on a match.
3565
3566 HOWEVER: when the subject string is very, very long, searching to its end
3567 can take a long time, and give bad performance on quite ordinary
3568 patterns. This showed up when somebody was matching /^C/ on a 32-megabyte
3569 string... so we don't do this when the string is sufficiently long. */
3570
3571 if (has_req_char && end_subject - current_subject < REQ_BYTE_MAX)
3572 {
3573 register PCRE_PUCHAR p = current_subject + (has_first_char? 1:0);
3574
3575 /* We don't need to repeat the search if we haven't yet reached the
3576 place we found it at last time. */
3577
3578 if (p > req_char_ptr)
3579 {
3580 if (req_char != req_char2)
3581 {
3582 while (p < end_subject)
3583 {
3584 register pcre_uint32 pp = UCHAR21INCTEST(p);
3585 if (pp == req_char || pp == req_char2) { p--; break; }
3586 }
3587 }
3588 else
3589 {
3590 while (p < end_subject)
3591 {
3592 if (UCHAR21INCTEST(p) == req_char) { p--; break; }
3593 }
3594 }
3595
3596 /* If we can't find the required pcre_uchar, break the matching loop,
3597 which will cause a return or PCRE_ERROR_NOMATCH. */
3598
3599 if (p >= end_subject) break;
3600
3601 /* If we have found the required pcre_uchar, save the point where we
3602 found it, so that we don't search again next time round the loop if
3603 the start hasn't passed this point yet. */
3604
3605 req_char_ptr = p;
3606 }
3607 }
3608 }
3609 } /* End of optimizations that are done when not restarting */
3610
3611 /* OK, now we can do the business */
3612
3613 md->start_used_ptr = current_subject;
3614 md->recursive = NULL;
3615
3616 rc = internal_dfa_exec(
3617 md, /* fixed match data */
3618 md->start_code, /* this subexpression's code */
3619 current_subject, /* where we currently are */
3620 start_offset, /* start offset in subject */
3621 offsets, /* offset vector */
3622 offsetcount, /* size of same */
3623 workspace, /* workspace vector */
3624 wscount, /* size of same */
3625 0); /* function recurse level */
3626
3627 /* Anything other than "no match" means we are done, always; otherwise, carry
3628 on only if not anchored. */
3629
3630 if (rc != PCRE_ERROR_NOMATCH || anchored)
3631 {
3632 if (rc == PCRE_ERROR_PARTIAL && offsetcount >= 2)
3633 {
3634 offsets[0] = (int)(md->start_used_ptr - (PCRE_PUCHAR)subject);
3635 offsets[1] = (int)(end_subject - (PCRE_PUCHAR)subject);
3636 if (offsetcount > 2)
3637 offsets[2] = (int)(current_subject - (PCRE_PUCHAR)subject);
3638 }
3639 return rc;
3640 }
3641
3642 /* Advance to the next subject character unless we are at the end of a line
3643 and firstline is set. */
3644
3645 if (firstline && IS_NEWLINE(current_subject)) break;
3646 current_subject++;
3647 #ifdef SUPPORT_UTF
3648 if (utf)
3649 {
3650 ACROSSCHAR(current_subject < end_subject, *current_subject,
3651 current_subject++);
3652 }
3653 #endif
3654 if (current_subject > end_subject) break;
3655
3656 /* If we have just passed a CR and we are now at a LF, and the pattern does
3657 not contain any explicit matches for \r or \n, and the newline option is CRLF
3658 or ANY or ANYCRLF, advance the match position by one more character. */
3659
3660 if (UCHAR21TEST(current_subject - 1) == CHAR_CR &&
3661 current_subject < end_subject &&
3662 UCHAR21TEST(current_subject) == CHAR_NL &&
3663 (re->flags & PCRE_HASCRORLF) == 0 &&
3664 (md->nltype == NLTYPE_ANY ||
3665 md->nltype == NLTYPE_ANYCRLF ||
3666 md->nllen == 2))
3667 current_subject++;
3668
3669 } /* "Bumpalong" loop */
3670
3671 return PCRE_ERROR_NOMATCH;
3672 }
3673
3674 /* End of pcre_dfa_exec.c */

Properties

Name Value
svn:eol-style native
svn:keywords "Author Date Id Revision Url"

  ViewVC Help
Powered by ViewVC 1.1.5