/[pcre]/code/trunk/pcre_jit_compile.c
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Contents of /code/trunk/pcre_jit_compile.c

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Revision 1049 - (show annotations)
Sat Sep 29 04:07:46 2012 UTC (7 years, 2 months ago) by zherczeg
File MIME type: text/plain
File size: 256663 byte(s)
Fix signed/unsigned comparison warnings.
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.
7
8 Written by Philip Hazel
9 Copyright (c) 1997-2012 University of Cambridge
10
11 The machine code generator part (this module) was written by Zoltan Herczeg
12 Copyright (c) 2010-2012
13
14 -----------------------------------------------------------------------------
15 Redistribution and use in source and binary forms, with or without
16 modification, are permitted provided that the following conditions are met:
17
18 * Redistributions of source code must retain the above copyright notice,
19 this list of conditions and the following disclaimer.
20
21 * Redistributions in binary form must reproduce the above copyright
22 notice, this list of conditions and the following disclaimer in the
23 documentation and/or other materials provided with the distribution.
24
25 * Neither the name of the University of Cambridge nor the names of its
26 contributors may be used to endorse or promote products derived from
27 this software without specific prior written permission.
28
29 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
30 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
33 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
34 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
35 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
36 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
37 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
39 POSSIBILITY OF SUCH DAMAGE.
40 -----------------------------------------------------------------------------
41 */
42
43 #ifdef HAVE_CONFIG_H
44 #include "config.h"
45 #endif
46
47 #include "pcre_internal.h"
48
49 #ifdef SUPPORT_JIT
50
51 /* All-in-one: Since we use the JIT compiler only from here,
52 we just include it. This way we don't need to touch the build
53 system files. */
54
55 #define SLJIT_MALLOC(size) (PUBL(malloc))(size)
56 #define SLJIT_FREE(ptr) (PUBL(free))(ptr)
57 #define SLJIT_CONFIG_AUTO 1
58 #define SLJIT_CONFIG_STATIC 1
59 #define SLJIT_VERBOSE 0
60 #define SLJIT_DEBUG 0
61
62 #include "sljit/sljitLir.c"
63
64 #if defined SLJIT_CONFIG_UNSUPPORTED && SLJIT_CONFIG_UNSUPPORTED
65 #error Unsupported architecture
66 #endif
67
68 /* Allocate memory for the regex stack on the real machine stack.
69 Fast, but limited size. */
70 #define MACHINE_STACK_SIZE 32768
71
72 /* Growth rate for stack allocated by the OS. Should be the multiply
73 of page size. */
74 #define STACK_GROWTH_RATE 8192
75
76 /* Enable to check that the allocation could destroy temporaries. */
77 #if defined SLJIT_DEBUG && SLJIT_DEBUG
78 #define DESTROY_REGISTERS 1
79 #endif
80
81 /*
82 Short summary about the backtracking mechanism empolyed by the jit code generator:
83
84 The code generator follows the recursive nature of the PERL compatible regular
85 expressions. The basic blocks of regular expressions are condition checkers
86 whose execute different commands depending on the result of the condition check.
87 The relationship between the operators can be horizontal (concatenation) and
88 vertical (sub-expression) (See struct backtrack_common for more details).
89
90 'ab' - 'a' and 'b' regexps are concatenated
91 'a+' - 'a' is the sub-expression of the '+' operator
92
93 The condition checkers are boolean (true/false) checkers. Machine code is generated
94 for the checker itself and for the actions depending on the result of the checker.
95 The 'true' case is called as the matching path (expected path), and the other is called as
96 the 'backtrack' path. Branch instructions are expesive for all CPUs, so we avoid taken
97 branches on the matching path.
98
99 Greedy star operator (*) :
100 Matching path: match happens.
101 Backtrack path: match failed.
102 Non-greedy star operator (*?) :
103 Matching path: no need to perform a match.
104 Backtrack path: match is required.
105
106 The following example shows how the code generated for a capturing bracket
107 with two alternatives. Let A, B, C, D are arbirary regular expressions, and
108 we have the following regular expression:
109
110 A(B|C)D
111
112 The generated code will be the following:
113
114 A matching path
115 '(' matching path (pushing arguments to the stack)
116 B matching path
117 ')' matching path (pushing arguments to the stack)
118 D matching path
119 return with successful match
120
121 D backtrack path
122 ')' backtrack path (If we arrived from "C" jump to the backtrack of "C")
123 B backtrack path
124 C expected path
125 jump to D matching path
126 C backtrack path
127 A backtrack path
128
129 Notice, that the order of backtrack code paths are the opposite of the fast
130 code paths. In this way the topmost value on the stack is always belong
131 to the current backtrack code path. The backtrack path must check
132 whether there is a next alternative. If so, it needs to jump back to
133 the matching path eventually. Otherwise it needs to clear out its own stack
134 frame and continue the execution on the backtrack code paths.
135 */
136
137 /*
138 Saved stack frames:
139
140 Atomic blocks and asserts require reloading the values of private data
141 when the backtrack mechanism performed. Because of OP_RECURSE, the data
142 are not necessarly known in compile time, thus we need a dynamic restore
143 mechanism.
144
145 The stack frames are stored in a chain list, and have the following format:
146 ([ capturing bracket offset ][ start value ][ end value ])+ ... [ 0 ] [ previous head ]
147
148 Thus we can restore the private data to a particular point in the stack.
149 */
150
151 typedef struct jit_arguments {
152 /* Pointers first. */
153 struct sljit_stack *stack;
154 const pcre_uchar *str;
155 const pcre_uchar *begin;
156 const pcre_uchar *end;
157 int *offsets;
158 pcre_uchar *uchar_ptr;
159 pcre_uchar *mark_ptr;
160 /* Everything else after. */
161 int offsetcount;
162 int calllimit;
163 pcre_uint8 notbol;
164 pcre_uint8 noteol;
165 pcre_uint8 notempty;
166 pcre_uint8 notempty_atstart;
167 } jit_arguments;
168
169 typedef struct executable_functions {
170 void *executable_funcs[JIT_NUMBER_OF_COMPILE_MODES];
171 PUBL(jit_callback) callback;
172 void *userdata;
173 sljit_uw executable_sizes[JIT_NUMBER_OF_COMPILE_MODES];
174 } executable_functions;
175
176 typedef struct jump_list {
177 struct sljit_jump *jump;
178 struct jump_list *next;
179 } jump_list;
180
181 enum stub_types { stack_alloc };
182
183 typedef struct stub_list {
184 enum stub_types type;
185 int data;
186 struct sljit_jump *start;
187 struct sljit_label *quit;
188 struct stub_list *next;
189 } stub_list;
190
191 typedef int (SLJIT_CALL *jit_function)(jit_arguments *args);
192
193 /* The following structure is the key data type for the recursive
194 code generator. It is allocated by compile_matchingpath, and contains
195 the aguments for compile_backtrackingpath. Must be the first member
196 of its descendants. */
197 typedef struct backtrack_common {
198 /* Concatenation stack. */
199 struct backtrack_common *prev;
200 jump_list *nextbacktracks;
201 /* Internal stack (for component operators). */
202 struct backtrack_common *top;
203 jump_list *topbacktracks;
204 /* Opcode pointer. */
205 pcre_uchar *cc;
206 } backtrack_common;
207
208 typedef struct assert_backtrack {
209 backtrack_common common;
210 jump_list *condfailed;
211 /* Less than 0 (-1) if a frame is not needed. */
212 int framesize;
213 /* Points to our private memory word on the stack. */
214 int private_data_ptr;
215 /* For iterators. */
216 struct sljit_label *matchingpath;
217 } assert_backtrack;
218
219 typedef struct bracket_backtrack {
220 backtrack_common common;
221 /* Where to coninue if an alternative is successfully matched. */
222 struct sljit_label *alternative_matchingpath;
223 /* For rmin and rmax iterators. */
224 struct sljit_label *recursive_matchingpath;
225 /* For greedy ? operator. */
226 struct sljit_label *zero_matchingpath;
227 /* Contains the branches of a failed condition. */
228 union {
229 /* Both for OP_COND, OP_SCOND. */
230 jump_list *condfailed;
231 assert_backtrack *assert;
232 /* For OP_ONCE. -1 if not needed. */
233 int framesize;
234 } u;
235 /* Points to our private memory word on the stack. */
236 int private_data_ptr;
237 } bracket_backtrack;
238
239 typedef struct bracketpos_backtrack {
240 backtrack_common common;
241 /* Points to our private memory word on the stack. */
242 int private_data_ptr;
243 /* Reverting stack is needed. */
244 int framesize;
245 /* Allocated stack size. */
246 int stacksize;
247 } bracketpos_backtrack;
248
249 typedef struct braminzero_backtrack {
250 backtrack_common common;
251 struct sljit_label *matchingpath;
252 } braminzero_backtrack;
253
254 typedef struct iterator_backtrack {
255 backtrack_common common;
256 /* Next iteration. */
257 struct sljit_label *matchingpath;
258 } iterator_backtrack;
259
260 typedef struct recurse_entry {
261 struct recurse_entry *next;
262 /* Contains the function entry. */
263 struct sljit_label *entry;
264 /* Collects the calls until the function is not created. */
265 jump_list *calls;
266 /* Points to the starting opcode. */
267 int start;
268 } recurse_entry;
269
270 typedef struct recurse_backtrack {
271 backtrack_common common;
272 } recurse_backtrack;
273
274 #define MAX_RANGE_SIZE 6
275
276 typedef struct compiler_common {
277 struct sljit_compiler *compiler;
278 pcre_uchar *start;
279
280 /* Maps private data offset to each opcode. */
281 int *private_data_ptrs;
282 /* Tells whether the capturing bracket is optimized. */
283 pcre_uint8 *optimized_cbracket;
284 /* Starting offset of private data for capturing brackets. */
285 int cbraptr;
286 /* OVector starting point. Must be divisible by 2. */
287 int ovector_start;
288 /* Last known position of the requested byte. */
289 int req_char_ptr;
290 /* Head of the last recursion. */
291 int recursive_head;
292 /* First inspected character for partial matching. */
293 int start_used_ptr;
294 /* Starting pointer for partial soft matches. */
295 int hit_start;
296 /* End pointer of the first line. */
297 int first_line_end;
298 /* Points to the marked string. */
299 int mark_ptr;
300
301 /* Flipped and lower case tables. */
302 const pcre_uint8 *fcc;
303 sljit_w lcc;
304 /* Mode can be PCRE_STUDY_JIT_COMPILE and others. */
305 int mode;
306 /* Newline control. */
307 int nltype;
308 int newline;
309 int bsr_nltype;
310 /* Dollar endonly. */
311 int endonly;
312 BOOL has_set_som;
313 /* Tables. */
314 sljit_w ctypes;
315 int digits[2 + MAX_RANGE_SIZE];
316 /* Named capturing brackets. */
317 sljit_uw name_table;
318 sljit_w name_count;
319 sljit_w name_entry_size;
320
321 /* Labels and jump lists. */
322 struct sljit_label *partialmatchlabel;
323 struct sljit_label *quitlabel;
324 struct sljit_label *acceptlabel;
325 stub_list *stubs;
326 recurse_entry *entries;
327 recurse_entry *currententry;
328 jump_list *partialmatch;
329 jump_list *quit;
330 jump_list *accept;
331 jump_list *calllimit;
332 jump_list *stackalloc;
333 jump_list *revertframes;
334 jump_list *wordboundary;
335 jump_list *anynewline;
336 jump_list *hspace;
337 jump_list *vspace;
338 jump_list *casefulcmp;
339 jump_list *caselesscmp;
340 BOOL jscript_compat;
341 #ifdef SUPPORT_UTF
342 BOOL utf;
343 #ifdef SUPPORT_UCP
344 BOOL use_ucp;
345 #endif
346 jump_list *utfreadchar;
347 #ifdef COMPILE_PCRE8
348 jump_list *utfreadtype8;
349 #endif
350 #endif /* SUPPORT_UTF */
351 #ifdef SUPPORT_UCP
352 jump_list *getucd;
353 #endif
354 } compiler_common;
355
356 /* For byte_sequence_compare. */
357
358 typedef struct compare_context {
359 int length;
360 int sourcereg;
361 #if defined SLJIT_UNALIGNED && SLJIT_UNALIGNED
362 int ucharptr;
363 union {
364 sljit_i asint;
365 sljit_uh asushort;
366 #ifdef COMPILE_PCRE8
367 sljit_ub asbyte;
368 sljit_ub asuchars[4];
369 #else
370 #ifdef COMPILE_PCRE16
371 sljit_uh asuchars[2];
372 #endif
373 #endif
374 } c;
375 union {
376 sljit_i asint;
377 sljit_uh asushort;
378 #ifdef COMPILE_PCRE8
379 sljit_ub asbyte;
380 sljit_ub asuchars[4];
381 #else
382 #ifdef COMPILE_PCRE16
383 sljit_uh asuchars[2];
384 #endif
385 #endif
386 } oc;
387 #endif
388 } compare_context;
389
390 enum {
391 frame_end = 0,
392 frame_setstrbegin = -1,
393 frame_setmark = -2
394 };
395
396 /* Undefine sljit macros. */
397 #undef CMP
398
399 /* Used for accessing the elements of the stack. */
400 #define STACK(i) ((-(i) - 1) * (int)sizeof(sljit_w))
401
402 #define TMP1 SLJIT_TEMPORARY_REG1
403 #define TMP2 SLJIT_TEMPORARY_REG3
404 #define TMP3 SLJIT_TEMPORARY_EREG2
405 #define STR_PTR SLJIT_SAVED_REG1
406 #define STR_END SLJIT_SAVED_REG2
407 #define STACK_TOP SLJIT_TEMPORARY_REG2
408 #define STACK_LIMIT SLJIT_SAVED_REG3
409 #define ARGUMENTS SLJIT_SAVED_EREG1
410 #define CALL_COUNT SLJIT_SAVED_EREG2
411 #define RETURN_ADDR SLJIT_TEMPORARY_EREG1
412
413 /* Local space layout. */
414 /* These two locals can be used by the current opcode. */
415 #define LOCALS0 (0 * sizeof(sljit_w))
416 #define LOCALS1 (1 * sizeof(sljit_w))
417 /* Two local variables for possessive quantifiers (char1 cannot use them). */
418 #define POSSESSIVE0 (2 * sizeof(sljit_w))
419 #define POSSESSIVE1 (3 * sizeof(sljit_w))
420 /* Max limit of recursions. */
421 #define CALL_LIMIT (4 * sizeof(sljit_w))
422 /* The output vector is stored on the stack, and contains pointers
423 to characters. The vector data is divided into two groups: the first
424 group contains the start / end character pointers, and the second is
425 the start pointers when the end of the capturing group has not yet reached. */
426 #define OVECTOR_START (common->ovector_start)
427 #define OVECTOR(i) (OVECTOR_START + (i) * sizeof(sljit_w))
428 #define OVECTOR_PRIV(i) (common->cbraptr + (i) * sizeof(sljit_w))
429 #define PRIVATE_DATA(cc) (common->private_data_ptrs[(cc) - common->start])
430
431 #ifdef COMPILE_PCRE8
432 #define MOV_UCHAR SLJIT_MOV_UB
433 #define MOVU_UCHAR SLJIT_MOVU_UB
434 #else
435 #ifdef COMPILE_PCRE16
436 #define MOV_UCHAR SLJIT_MOV_UH
437 #define MOVU_UCHAR SLJIT_MOVU_UH
438 #else
439 #error Unsupported compiling mode
440 #endif
441 #endif
442
443 /* Shortcuts. */
444 #define DEFINE_COMPILER \
445 struct sljit_compiler *compiler = common->compiler
446 #define OP1(op, dst, dstw, src, srcw) \
447 sljit_emit_op1(compiler, (op), (dst), (dstw), (src), (srcw))
448 #define OP2(op, dst, dstw, src1, src1w, src2, src2w) \
449 sljit_emit_op2(compiler, (op), (dst), (dstw), (src1), (src1w), (src2), (src2w))
450 #define LABEL() \
451 sljit_emit_label(compiler)
452 #define JUMP(type) \
453 sljit_emit_jump(compiler, (type))
454 #define JUMPTO(type, label) \
455 sljit_set_label(sljit_emit_jump(compiler, (type)), (label))
456 #define JUMPHERE(jump) \
457 sljit_set_label((jump), sljit_emit_label(compiler))
458 #define CMP(type, src1, src1w, src2, src2w) \
459 sljit_emit_cmp(compiler, (type), (src1), (src1w), (src2), (src2w))
460 #define CMPTO(type, src1, src1w, src2, src2w, label) \
461 sljit_set_label(sljit_emit_cmp(compiler, (type), (src1), (src1w), (src2), (src2w)), (label))
462 #define COND_VALUE(op, dst, dstw, type) \
463 sljit_emit_cond_value(compiler, (op), (dst), (dstw), (type))
464 #define GET_LOCAL_BASE(dst, dstw, offset) \
465 sljit_get_local_base(compiler, (dst), (dstw), (offset))
466
467 static pcre_uchar* bracketend(pcre_uchar* cc)
468 {
469 SLJIT_ASSERT((*cc >= OP_ASSERT && *cc <= OP_ASSERTBACK_NOT) || (*cc >= OP_ONCE && *cc <= OP_SCOND));
470 do cc += GET(cc, 1); while (*cc == OP_ALT);
471 SLJIT_ASSERT(*cc >= OP_KET && *cc <= OP_KETRPOS);
472 cc += 1 + LINK_SIZE;
473 return cc;
474 }
475
476 /* Functions whose might need modification for all new supported opcodes:
477 next_opcode
478 get_private_data_length
479 set_private_data_ptrs
480 get_framesize
481 init_frame
482 get_private_data_length_for_copy
483 copy_private_data
484 compile_matchingpath
485 compile_backtrackingpath
486 */
487
488 static pcre_uchar *next_opcode(compiler_common *common, pcre_uchar *cc)
489 {
490 SLJIT_UNUSED_ARG(common);
491 switch(*cc)
492 {
493 case OP_SOD:
494 case OP_SOM:
495 case OP_SET_SOM:
496 case OP_NOT_WORD_BOUNDARY:
497 case OP_WORD_BOUNDARY:
498 case OP_NOT_DIGIT:
499 case OP_DIGIT:
500 case OP_NOT_WHITESPACE:
501 case OP_WHITESPACE:
502 case OP_NOT_WORDCHAR:
503 case OP_WORDCHAR:
504 case OP_ANY:
505 case OP_ALLANY:
506 case OP_ANYNL:
507 case OP_NOT_HSPACE:
508 case OP_HSPACE:
509 case OP_NOT_VSPACE:
510 case OP_VSPACE:
511 case OP_EXTUNI:
512 case OP_EODN:
513 case OP_EOD:
514 case OP_CIRC:
515 case OP_CIRCM:
516 case OP_DOLL:
517 case OP_DOLLM:
518 case OP_TYPESTAR:
519 case OP_TYPEMINSTAR:
520 case OP_TYPEPLUS:
521 case OP_TYPEMINPLUS:
522 case OP_TYPEQUERY:
523 case OP_TYPEMINQUERY:
524 case OP_TYPEPOSSTAR:
525 case OP_TYPEPOSPLUS:
526 case OP_TYPEPOSQUERY:
527 case OP_CRSTAR:
528 case OP_CRMINSTAR:
529 case OP_CRPLUS:
530 case OP_CRMINPLUS:
531 case OP_CRQUERY:
532 case OP_CRMINQUERY:
533 case OP_DEF:
534 case OP_BRAZERO:
535 case OP_BRAMINZERO:
536 case OP_BRAPOSZERO:
537 case OP_COMMIT:
538 case OP_FAIL:
539 case OP_ACCEPT:
540 case OP_ASSERT_ACCEPT:
541 case OP_SKIPZERO:
542 return cc + 1;
543
544 case OP_ANYBYTE:
545 #ifdef SUPPORT_UTF
546 if (common->utf) return NULL;
547 #endif
548 return cc + 1;
549
550 case OP_CHAR:
551 case OP_CHARI:
552 case OP_NOT:
553 case OP_NOTI:
554 case OP_STAR:
555 case OP_MINSTAR:
556 case OP_PLUS:
557 case OP_MINPLUS:
558 case OP_QUERY:
559 case OP_MINQUERY:
560 case OP_POSSTAR:
561 case OP_POSPLUS:
562 case OP_POSQUERY:
563 case OP_STARI:
564 case OP_MINSTARI:
565 case OP_PLUSI:
566 case OP_MINPLUSI:
567 case OP_QUERYI:
568 case OP_MINQUERYI:
569 case OP_POSSTARI:
570 case OP_POSPLUSI:
571 case OP_POSQUERYI:
572 case OP_NOTSTAR:
573 case OP_NOTMINSTAR:
574 case OP_NOTPLUS:
575 case OP_NOTMINPLUS:
576 case OP_NOTQUERY:
577 case OP_NOTMINQUERY:
578 case OP_NOTPOSSTAR:
579 case OP_NOTPOSPLUS:
580 case OP_NOTPOSQUERY:
581 case OP_NOTSTARI:
582 case OP_NOTMINSTARI:
583 case OP_NOTPLUSI:
584 case OP_NOTMINPLUSI:
585 case OP_NOTQUERYI:
586 case OP_NOTMINQUERYI:
587 case OP_NOTPOSSTARI:
588 case OP_NOTPOSPLUSI:
589 case OP_NOTPOSQUERYI:
590 cc += 2;
591 #ifdef SUPPORT_UTF
592 if (common->utf && HAS_EXTRALEN(cc[-1])) cc += GET_EXTRALEN(cc[-1]);
593 #endif
594 return cc;
595
596 case OP_UPTO:
597 case OP_MINUPTO:
598 case OP_EXACT:
599 case OP_POSUPTO:
600 case OP_UPTOI:
601 case OP_MINUPTOI:
602 case OP_EXACTI:
603 case OP_POSUPTOI:
604 case OP_NOTUPTO:
605 case OP_NOTMINUPTO:
606 case OP_NOTEXACT:
607 case OP_NOTPOSUPTO:
608 case OP_NOTUPTOI:
609 case OP_NOTMINUPTOI:
610 case OP_NOTEXACTI:
611 case OP_NOTPOSUPTOI:
612 cc += 2 + IMM2_SIZE;
613 #ifdef SUPPORT_UTF
614 if (common->utf && HAS_EXTRALEN(cc[-1])) cc += GET_EXTRALEN(cc[-1]);
615 #endif
616 return cc;
617
618 case OP_NOTPROP:
619 case OP_PROP:
620 return cc + 1 + 2;
621
622 case OP_TYPEUPTO:
623 case OP_TYPEMINUPTO:
624 case OP_TYPEEXACT:
625 case OP_TYPEPOSUPTO:
626 case OP_REF:
627 case OP_REFI:
628 case OP_CREF:
629 case OP_NCREF:
630 case OP_RREF:
631 case OP_NRREF:
632 case OP_CLOSE:
633 cc += 1 + IMM2_SIZE;
634 return cc;
635
636 case OP_CRRANGE:
637 case OP_CRMINRANGE:
638 return cc + 1 + 2 * IMM2_SIZE;
639
640 case OP_CLASS:
641 case OP_NCLASS:
642 return cc + 1 + 32 / sizeof(pcre_uchar);
643
644 #if defined SUPPORT_UTF || !defined COMPILE_PCRE8
645 case OP_XCLASS:
646 return cc + GET(cc, 1);
647 #endif
648
649 case OP_RECURSE:
650 case OP_ASSERT:
651 case OP_ASSERT_NOT:
652 case OP_ASSERTBACK:
653 case OP_ASSERTBACK_NOT:
654 case OP_REVERSE:
655 case OP_ONCE:
656 case OP_ONCE_NC:
657 case OP_BRA:
658 case OP_BRAPOS:
659 case OP_COND:
660 case OP_SBRA:
661 case OP_SBRAPOS:
662 case OP_SCOND:
663 case OP_ALT:
664 case OP_KET:
665 case OP_KETRMAX:
666 case OP_KETRMIN:
667 case OP_KETRPOS:
668 return cc + 1 + LINK_SIZE;
669
670 case OP_CBRA:
671 case OP_CBRAPOS:
672 case OP_SCBRA:
673 case OP_SCBRAPOS:
674 return cc + 1 + LINK_SIZE + IMM2_SIZE;
675
676 case OP_MARK:
677 return cc + 1 + 2 + cc[1];
678
679 default:
680 return NULL;
681 }
682 }
683
684 #define CASE_ITERATOR_PRIVATE_DATA_1 \
685 case OP_MINSTAR: \
686 case OP_MINPLUS: \
687 case OP_QUERY: \
688 case OP_MINQUERY: \
689 case OP_MINSTARI: \
690 case OP_MINPLUSI: \
691 case OP_QUERYI: \
692 case OP_MINQUERYI: \
693 case OP_NOTMINSTAR: \
694 case OP_NOTMINPLUS: \
695 case OP_NOTQUERY: \
696 case OP_NOTMINQUERY: \
697 case OP_NOTMINSTARI: \
698 case OP_NOTMINPLUSI: \
699 case OP_NOTQUERYI: \
700 case OP_NOTMINQUERYI:
701
702 #define CASE_ITERATOR_PRIVATE_DATA_2A \
703 case OP_STAR: \
704 case OP_PLUS: \
705 case OP_STARI: \
706 case OP_PLUSI: \
707 case OP_NOTSTAR: \
708 case OP_NOTPLUS: \
709 case OP_NOTSTARI: \
710 case OP_NOTPLUSI:
711
712 #define CASE_ITERATOR_PRIVATE_DATA_2B \
713 case OP_UPTO: \
714 case OP_MINUPTO: \
715 case OP_UPTOI: \
716 case OP_MINUPTOI: \
717 case OP_NOTUPTO: \
718 case OP_NOTMINUPTO: \
719 case OP_NOTUPTOI: \
720 case OP_NOTMINUPTOI:
721
722 #define CASE_ITERATOR_TYPE_PRIVATE_DATA_1 \
723 case OP_TYPEMINSTAR: \
724 case OP_TYPEMINPLUS: \
725 case OP_TYPEQUERY: \
726 case OP_TYPEMINQUERY:
727
728 #define CASE_ITERATOR_TYPE_PRIVATE_DATA_2A \
729 case OP_TYPESTAR: \
730 case OP_TYPEPLUS:
731
732 #define CASE_ITERATOR_TYPE_PRIVATE_DATA_2B \
733 case OP_TYPEUPTO: \
734 case OP_TYPEMINUPTO:
735
736 static int get_class_iterator_size(pcre_uchar *cc)
737 {
738 switch(*cc)
739 {
740 case OP_CRSTAR:
741 case OP_CRPLUS:
742 return 2;
743
744 case OP_CRMINSTAR:
745 case OP_CRMINPLUS:
746 case OP_CRQUERY:
747 case OP_CRMINQUERY:
748 return 1;
749
750 case OP_CRRANGE:
751 case OP_CRMINRANGE:
752 if (GET2(cc, 1) == GET2(cc, 1 + IMM2_SIZE))
753 return 0;
754 return 2;
755
756 default:
757 return 0;
758 }
759 }
760
761 static int get_private_data_length(compiler_common *common, pcre_uchar *cc, pcre_uchar *ccend)
762 {
763 int private_data_length = 0;
764 pcre_uchar *alternative;
765 pcre_uchar *name;
766 pcre_uchar *end = NULL;
767 int space, size, bracketlen, i;
768
769 /* Calculate important variables (like stack size) and checks whether all opcodes are supported. */
770 while (cc < ccend)
771 {
772 space = 0;
773 size = 0;
774 bracketlen = 0;
775 switch(*cc)
776 {
777 case OP_SET_SOM:
778 common->has_set_som = TRUE;
779 cc += 1;
780 break;
781
782 case OP_REF:
783 case OP_REFI:
784 common->optimized_cbracket[GET2(cc, 1)] = 0;
785 cc += 1 + IMM2_SIZE;
786 break;
787
788 case OP_ASSERT:
789 case OP_ASSERT_NOT:
790 case OP_ASSERTBACK:
791 case OP_ASSERTBACK_NOT:
792 case OP_ONCE:
793 case OP_ONCE_NC:
794 case OP_BRAPOS:
795 case OP_SBRA:
796 case OP_SBRAPOS:
797 private_data_length += sizeof(sljit_w);
798 bracketlen = 1 + LINK_SIZE;
799 break;
800
801 case OP_CBRAPOS:
802 case OP_SCBRAPOS:
803 private_data_length += sizeof(sljit_w);
804 common->optimized_cbracket[GET2(cc, 1 + LINK_SIZE)] = 0;
805 bracketlen = 1 + LINK_SIZE + IMM2_SIZE;
806 break;
807
808 case OP_COND:
809 case OP_SCOND:
810 bracketlen = cc[1 + LINK_SIZE];
811 if (bracketlen == OP_CREF)
812 {
813 bracketlen = GET2(cc, 1 + LINK_SIZE + 1);
814 common->optimized_cbracket[bracketlen] = 0;
815 }
816 else if (bracketlen == OP_NCREF)
817 {
818 bracketlen = GET2(cc, 1 + LINK_SIZE + 1);
819 name = (pcre_uchar *)common->name_table;
820 alternative = name;
821 for (i = 0; i < common->name_count; i++)
822 {
823 if (GET2(name, 0) == bracketlen) break;
824 name += common->name_entry_size;
825 }
826 SLJIT_ASSERT(i != common->name_count);
827
828 for (i = 0; i < common->name_count; i++)
829 {
830 if (STRCMP_UC_UC(alternative + IMM2_SIZE, name + IMM2_SIZE) == 0)
831 common->optimized_cbracket[GET2(alternative, 0)] = 0;
832 alternative += common->name_entry_size;
833 }
834 }
835
836 if (*cc == OP_COND)
837 {
838 /* Might be a hidden SCOND. */
839 alternative = cc + GET(cc, 1);
840 if (*alternative == OP_KETRMAX || *alternative == OP_KETRMIN)
841 private_data_length += sizeof(sljit_w);
842 }
843 else
844 private_data_length += sizeof(sljit_w);
845 bracketlen = 1 + LINK_SIZE;
846 break;
847
848 case OP_BRA:
849 bracketlen = 1 + LINK_SIZE;
850 break;
851
852 case OP_CBRA:
853 case OP_SCBRA:
854 bracketlen = 1 + LINK_SIZE + IMM2_SIZE;
855 break;
856
857 CASE_ITERATOR_PRIVATE_DATA_1
858 space = 1;
859 size = -2;
860 break;
861
862 CASE_ITERATOR_PRIVATE_DATA_2A
863 space = 2;
864 size = -2;
865 break;
866
867 CASE_ITERATOR_PRIVATE_DATA_2B
868 space = 2;
869 size = -(2 + IMM2_SIZE);
870 break;
871
872 CASE_ITERATOR_TYPE_PRIVATE_DATA_1
873 space = 1;
874 size = 1;
875 break;
876
877 CASE_ITERATOR_TYPE_PRIVATE_DATA_2A
878 if (cc[1] != OP_ANYNL && cc[1] != OP_EXTUNI)
879 space = 2;
880 size = 1;
881 break;
882
883 CASE_ITERATOR_TYPE_PRIVATE_DATA_2B
884 if (cc[1 + IMM2_SIZE] != OP_ANYNL && cc[1 + IMM2_SIZE] != OP_EXTUNI)
885 space = 2;
886 size = 1 + IMM2_SIZE;
887 break;
888
889 case OP_CLASS:
890 case OP_NCLASS:
891 size += 1 + 32 / sizeof(pcre_uchar);
892 space = get_class_iterator_size(cc + size);
893 break;
894
895 #if defined SUPPORT_UTF || !defined COMPILE_PCRE8
896 case OP_XCLASS:
897 size = GET(cc, 1);
898 space = get_class_iterator_size(cc + size);
899 break;
900 #endif
901
902 case OP_RECURSE:
903 /* Set its value only once. */
904 if (common->recursive_head == 0)
905 {
906 common->recursive_head = common->ovector_start;
907 common->ovector_start += sizeof(sljit_w);
908 }
909 cc += 1 + LINK_SIZE;
910 break;
911
912 case OP_MARK:
913 if (common->mark_ptr == 0)
914 {
915 common->mark_ptr = common->ovector_start;
916 common->ovector_start += sizeof(sljit_w);
917 }
918 cc += 1 + 2 + cc[1];
919 break;
920
921 default:
922 cc = next_opcode(common, cc);
923 if (cc == NULL)
924 return -1;
925 break;
926 }
927
928 if (space > 0 && cc >= end)
929 private_data_length += sizeof(sljit_w) * space;
930
931 if (size != 0)
932 {
933 if (size < 0)
934 {
935 cc += -size;
936 #ifdef SUPPORT_UTF
937 if (common->utf && HAS_EXTRALEN(cc[-1])) cc += GET_EXTRALEN(cc[-1]);
938 #endif
939 }
940 else
941 cc += size;
942 }
943
944 if (bracketlen > 0)
945 {
946 if (cc >= end)
947 {
948 end = bracketend(cc);
949 if (end[-1 - LINK_SIZE] == OP_KET)
950 end = NULL;
951 }
952 cc += bracketlen;
953 }
954 }
955 return private_data_length;
956 }
957
958 static void set_private_data_ptrs(compiler_common *common, int private_data_ptr, pcre_uchar *ccend)
959 {
960 pcre_uchar *cc = common->start;
961 pcre_uchar *alternative;
962 pcre_uchar *end = NULL;
963 int space, size, bracketlen;
964
965 while (cc < ccend)
966 {
967 space = 0;
968 size = 0;
969 bracketlen = 0;
970 switch(*cc)
971 {
972 case OP_ASSERT:
973 case OP_ASSERT_NOT:
974 case OP_ASSERTBACK:
975 case OP_ASSERTBACK_NOT:
976 case OP_ONCE:
977 case OP_ONCE_NC:
978 case OP_BRAPOS:
979 case OP_SBRA:
980 case OP_SBRAPOS:
981 case OP_SCOND:
982 common->private_data_ptrs[cc - common->start] = private_data_ptr;
983 private_data_ptr += sizeof(sljit_w);
984 bracketlen = 1 + LINK_SIZE;
985 break;
986
987 case OP_CBRAPOS:
988 case OP_SCBRAPOS:
989 common->private_data_ptrs[cc - common->start] = private_data_ptr;
990 private_data_ptr += sizeof(sljit_w);
991 bracketlen = 1 + LINK_SIZE + IMM2_SIZE;
992 break;
993
994 case OP_COND:
995 /* Might be a hidden SCOND. */
996 alternative = cc + GET(cc, 1);
997 if (*alternative == OP_KETRMAX || *alternative == OP_KETRMIN)
998 {
999 common->private_data_ptrs[cc - common->start] = private_data_ptr;
1000 private_data_ptr += sizeof(sljit_w);
1001 }
1002 bracketlen = 1 + LINK_SIZE;
1003 break;
1004
1005 case OP_BRA:
1006 bracketlen = 1 + LINK_SIZE;
1007 break;
1008
1009 case OP_CBRA:
1010 case OP_SCBRA:
1011 bracketlen = 1 + LINK_SIZE + IMM2_SIZE;
1012 break;
1013
1014 CASE_ITERATOR_PRIVATE_DATA_1
1015 space = 1;
1016 size = -2;
1017 break;
1018
1019 CASE_ITERATOR_PRIVATE_DATA_2A
1020 space = 2;
1021 size = -2;
1022 break;
1023
1024 CASE_ITERATOR_PRIVATE_DATA_2B
1025 space = 2;
1026 size = -(2 + IMM2_SIZE);
1027 break;
1028
1029 CASE_ITERATOR_TYPE_PRIVATE_DATA_1
1030 space = 1;
1031 size = 1;
1032 break;
1033
1034 CASE_ITERATOR_TYPE_PRIVATE_DATA_2A
1035 if (cc[1] != OP_ANYNL && cc[1] != OP_EXTUNI)
1036 space = 2;
1037 size = 1;
1038 break;
1039
1040 CASE_ITERATOR_TYPE_PRIVATE_DATA_2B
1041 if (cc[1 + IMM2_SIZE] != OP_ANYNL && cc[1 + IMM2_SIZE] != OP_EXTUNI)
1042 space = 2;
1043 size = 1 + IMM2_SIZE;
1044 break;
1045
1046 case OP_CLASS:
1047 case OP_NCLASS:
1048 size += 1 + 32 / sizeof(pcre_uchar);
1049 space = get_class_iterator_size(cc + size);
1050 break;
1051
1052 #if defined SUPPORT_UTF || !defined COMPILE_PCRE8
1053 case OP_XCLASS:
1054 size = GET(cc, 1);
1055 space = get_class_iterator_size(cc + size);
1056 break;
1057 #endif
1058
1059 default:
1060 cc = next_opcode(common, cc);
1061 SLJIT_ASSERT(cc != NULL);
1062 break;
1063 }
1064
1065 if (space > 0 && cc >= end)
1066 {
1067 common->private_data_ptrs[cc - common->start] = private_data_ptr;
1068 private_data_ptr += sizeof(sljit_w) * space;
1069 }
1070
1071 if (size != 0)
1072 {
1073 if (size < 0)
1074 {
1075 cc += -size;
1076 #ifdef SUPPORT_UTF
1077 if (common->utf && HAS_EXTRALEN(cc[-1])) cc += GET_EXTRALEN(cc[-1]);
1078 #endif
1079 }
1080 else
1081 cc += size;
1082 }
1083
1084 if (bracketlen > 0)
1085 {
1086 if (cc >= end)
1087 {
1088 end = bracketend(cc);
1089 if (end[-1 - LINK_SIZE] == OP_KET)
1090 end = NULL;
1091 }
1092 cc += bracketlen;
1093 }
1094 }
1095 }
1096
1097 /* Returns with -1 if no need for frame. */
1098 static int get_framesize(compiler_common *common, pcre_uchar *cc, BOOL recursive)
1099 {
1100 pcre_uchar *ccend = bracketend(cc);
1101 int length = 0;
1102 BOOL possessive = FALSE;
1103 BOOL setsom_found = recursive;
1104 BOOL setmark_found = recursive;
1105
1106 if (!recursive && (*cc == OP_CBRAPOS || *cc == OP_SCBRAPOS))
1107 {
1108 length = 3;
1109 possessive = TRUE;
1110 }
1111
1112 cc = next_opcode(common, cc);
1113 SLJIT_ASSERT(cc != NULL);
1114 while (cc < ccend)
1115 switch(*cc)
1116 {
1117 case OP_SET_SOM:
1118 SLJIT_ASSERT(common->has_set_som);
1119 if (!setsom_found)
1120 {
1121 length += 2;
1122 setsom_found = TRUE;
1123 }
1124 cc += 1;
1125 break;
1126
1127 case OP_MARK:
1128 SLJIT_ASSERT(common->mark_ptr != 0);
1129 if (!setmark_found)
1130 {
1131 length += 2;
1132 setmark_found = TRUE;
1133 }
1134 cc += 1 + 2 + cc[1];
1135 break;
1136
1137 case OP_RECURSE:
1138 if (common->has_set_som && !setsom_found)
1139 {
1140 length += 2;
1141 setsom_found = TRUE;
1142 }
1143 if (common->mark_ptr != 0 && !setmark_found)
1144 {
1145 length += 2;
1146 setmark_found = TRUE;
1147 }
1148 cc += 1 + LINK_SIZE;
1149 break;
1150
1151 case OP_CBRA:
1152 case OP_CBRAPOS:
1153 case OP_SCBRA:
1154 case OP_SCBRAPOS:
1155 length += 3;
1156 cc += 1 + LINK_SIZE + IMM2_SIZE;
1157 break;
1158
1159 default:
1160 cc = next_opcode(common, cc);
1161 SLJIT_ASSERT(cc != NULL);
1162 break;
1163 }
1164
1165 /* Possessive quantifiers can use a special case. */
1166 if (SLJIT_UNLIKELY(possessive) && length == 3)
1167 return -1;
1168
1169 if (length > 0)
1170 return length + 1;
1171 return -1;
1172 }
1173
1174 static void init_frame(compiler_common *common, pcre_uchar *cc, int stackpos, int stacktop, BOOL recursive)
1175 {
1176 DEFINE_COMPILER;
1177 pcre_uchar *ccend = bracketend(cc);
1178 BOOL setsom_found = recursive;
1179 BOOL setmark_found = recursive;
1180 int offset;
1181
1182 /* >= 1 + shortest item size (2) */
1183 SLJIT_UNUSED_ARG(stacktop);
1184 SLJIT_ASSERT(stackpos >= stacktop + 2);
1185
1186 stackpos = STACK(stackpos);
1187 if (recursive || (*cc != OP_CBRAPOS && *cc != OP_SCBRAPOS))
1188 cc = next_opcode(common, cc);
1189 SLJIT_ASSERT(cc != NULL);
1190 while (cc < ccend)
1191 switch(*cc)
1192 {
1193 case OP_SET_SOM:
1194 SLJIT_ASSERT(common->has_set_som);
1195 if (!setsom_found)
1196 {
1197 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(0));
1198 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), stackpos, SLJIT_IMM, frame_setstrbegin);
1199 stackpos += (int)sizeof(sljit_w);
1200 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), stackpos, TMP1, 0);
1201 stackpos += (int)sizeof(sljit_w);
1202 setsom_found = TRUE;
1203 }
1204 cc += 1;
1205 break;
1206
1207 case OP_MARK:
1208 SLJIT_ASSERT(common->mark_ptr != 0);
1209 if (!setmark_found)
1210 {
1211 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), common->mark_ptr);
1212 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), stackpos, SLJIT_IMM, frame_setmark);
1213 stackpos += (int)sizeof(sljit_w);
1214 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), stackpos, TMP1, 0);
1215 stackpos += (int)sizeof(sljit_w);
1216 setmark_found = TRUE;
1217 }
1218 cc += 1 + 2 + cc[1];
1219 break;
1220
1221 case OP_RECURSE:
1222 if (common->has_set_som && !setsom_found)
1223 {
1224 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(0));
1225 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), stackpos, SLJIT_IMM, frame_setstrbegin);
1226 stackpos += (int)sizeof(sljit_w);
1227 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), stackpos, TMP1, 0);
1228 stackpos += (int)sizeof(sljit_w);
1229 setsom_found = TRUE;
1230 }
1231 if (common->mark_ptr != 0 && !setmark_found)
1232 {
1233 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), common->mark_ptr);
1234 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), stackpos, SLJIT_IMM, frame_setmark);
1235 stackpos += (int)sizeof(sljit_w);
1236 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), stackpos, TMP1, 0);
1237 stackpos += (int)sizeof(sljit_w);
1238 setmark_found = TRUE;
1239 }
1240 cc += 1 + LINK_SIZE;
1241 break;
1242
1243 case OP_CBRA:
1244 case OP_CBRAPOS:
1245 case OP_SCBRA:
1246 case OP_SCBRAPOS:
1247 offset = (GET2(cc, 1 + LINK_SIZE)) << 1;
1248 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), stackpos, SLJIT_IMM, OVECTOR(offset));
1249 stackpos += (int)sizeof(sljit_w);
1250 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(offset));
1251 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(offset + 1));
1252 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), stackpos, TMP1, 0);
1253 stackpos += (int)sizeof(sljit_w);
1254 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), stackpos, TMP2, 0);
1255 stackpos += (int)sizeof(sljit_w);
1256
1257 cc += 1 + LINK_SIZE + IMM2_SIZE;
1258 break;
1259
1260 default:
1261 cc = next_opcode(common, cc);
1262 SLJIT_ASSERT(cc != NULL);
1263 break;
1264 }
1265
1266 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), stackpos, SLJIT_IMM, frame_end);
1267 SLJIT_ASSERT(stackpos == STACK(stacktop));
1268 }
1269
1270 static SLJIT_INLINE int get_private_data_length_for_copy(compiler_common *common, pcre_uchar *cc, pcre_uchar *ccend)
1271 {
1272 int private_data_length = 2;
1273 int size;
1274 pcre_uchar *alternative;
1275 /* Calculate the sum of the private machine words. */
1276 while (cc < ccend)
1277 {
1278 size = 0;
1279 switch(*cc)
1280 {
1281 case OP_ASSERT:
1282 case OP_ASSERT_NOT:
1283 case OP_ASSERTBACK:
1284 case OP_ASSERTBACK_NOT:
1285 case OP_ONCE:
1286 case OP_ONCE_NC:
1287 case OP_BRAPOS:
1288 case OP_SBRA:
1289 case OP_SBRAPOS:
1290 case OP_SCOND:
1291 private_data_length++;
1292 cc += 1 + LINK_SIZE;
1293 break;
1294
1295 case OP_CBRA:
1296 case OP_SCBRA:
1297 if (common->optimized_cbracket[GET2(cc, 1 + LINK_SIZE)] == 0)
1298 private_data_length++;
1299 cc += 1 + LINK_SIZE + IMM2_SIZE;
1300 break;
1301
1302 case OP_CBRAPOS:
1303 case OP_SCBRAPOS:
1304 private_data_length += 2;
1305 cc += 1 + LINK_SIZE + IMM2_SIZE;
1306 break;
1307
1308 case OP_COND:
1309 /* Might be a hidden SCOND. */
1310 alternative = cc + GET(cc, 1);
1311 if (*alternative == OP_KETRMAX || *alternative == OP_KETRMIN)
1312 private_data_length++;
1313 cc += 1 + LINK_SIZE;
1314 break;
1315
1316 CASE_ITERATOR_PRIVATE_DATA_1
1317 if (PRIVATE_DATA(cc))
1318 private_data_length++;
1319 cc += 2;
1320 #ifdef SUPPORT_UTF
1321 if (common->utf && HAS_EXTRALEN(cc[-1])) cc += GET_EXTRALEN(cc[-1]);
1322 #endif
1323 break;
1324
1325 CASE_ITERATOR_PRIVATE_DATA_2A
1326 if (PRIVATE_DATA(cc))
1327 private_data_length += 2;
1328 cc += 2;
1329 #ifdef SUPPORT_UTF
1330 if (common->utf && HAS_EXTRALEN(cc[-1])) cc += GET_EXTRALEN(cc[-1]);
1331 #endif
1332 break;
1333
1334 CASE_ITERATOR_PRIVATE_DATA_2B
1335 if (PRIVATE_DATA(cc))
1336 private_data_length += 2;
1337 cc += 2 + IMM2_SIZE;
1338 #ifdef SUPPORT_UTF
1339 if (common->utf && HAS_EXTRALEN(cc[-1])) cc += GET_EXTRALEN(cc[-1]);
1340 #endif
1341 break;
1342
1343 CASE_ITERATOR_TYPE_PRIVATE_DATA_1
1344 if (PRIVATE_DATA(cc))
1345 private_data_length++;
1346 cc += 1;
1347 break;
1348
1349 CASE_ITERATOR_TYPE_PRIVATE_DATA_2A
1350 if (PRIVATE_DATA(cc))
1351 private_data_length += 2;
1352 cc += 1;
1353 break;
1354
1355 CASE_ITERATOR_TYPE_PRIVATE_DATA_2B
1356 if (PRIVATE_DATA(cc))
1357 private_data_length += 2;
1358 cc += 1 + IMM2_SIZE;
1359 break;
1360
1361 case OP_CLASS:
1362 case OP_NCLASS:
1363 #if defined SUPPORT_UTF || !defined COMPILE_PCRE8
1364 case OP_XCLASS:
1365 size = (*cc == OP_XCLASS) ? GET(cc, 1) : 1 + 32 / (int)sizeof(pcre_uchar);
1366 #else
1367 size = 1 + 32 / (int)sizeof(pcre_uchar);
1368 #endif
1369 if (PRIVATE_DATA(cc))
1370 private_data_length += get_class_iterator_size(cc + size);
1371 cc += size;
1372 break;
1373
1374 default:
1375 cc = next_opcode(common, cc);
1376 SLJIT_ASSERT(cc != NULL);
1377 break;
1378 }
1379 }
1380 SLJIT_ASSERT(cc == ccend);
1381 return private_data_length;
1382 }
1383
1384 static void copy_private_data(compiler_common *common, pcre_uchar *cc, pcre_uchar *ccend,
1385 BOOL save, int stackptr, int stacktop)
1386 {
1387 DEFINE_COMPILER;
1388 int srcw[2];
1389 int count, size;
1390 BOOL tmp1next = TRUE;
1391 BOOL tmp1empty = TRUE;
1392 BOOL tmp2empty = TRUE;
1393 pcre_uchar *alternative;
1394 enum {
1395 start,
1396 loop,
1397 end
1398 } status;
1399
1400 status = save ? start : loop;
1401 stackptr = STACK(stackptr - 2);
1402 stacktop = STACK(stacktop - 1);
1403
1404 if (!save)
1405 {
1406 stackptr += sizeof(sljit_w);
1407 if (stackptr < stacktop)
1408 {
1409 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(STACK_TOP), stackptr);
1410 stackptr += sizeof(sljit_w);
1411 tmp1empty = FALSE;
1412 }
1413 if (stackptr < stacktop)
1414 {
1415 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(STACK_TOP), stackptr);
1416 stackptr += sizeof(sljit_w);
1417 tmp2empty = FALSE;
1418 }
1419 /* The tmp1next must be TRUE in either way. */
1420 }
1421
1422 while (status != end)
1423 {
1424 count = 0;
1425 switch(status)
1426 {
1427 case start:
1428 SLJIT_ASSERT(save && common->recursive_head != 0);
1429 count = 1;
1430 srcw[0] = common->recursive_head;
1431 status = loop;
1432 break;
1433
1434 case loop:
1435 if (cc >= ccend)
1436 {
1437 status = end;
1438 break;
1439 }
1440
1441 switch(*cc)
1442 {
1443 case OP_ASSERT:
1444 case OP_ASSERT_NOT:
1445 case OP_ASSERTBACK:
1446 case OP_ASSERTBACK_NOT:
1447 case OP_ONCE:
1448 case OP_ONCE_NC:
1449 case OP_BRAPOS:
1450 case OP_SBRA:
1451 case OP_SBRAPOS:
1452 case OP_SCOND:
1453 count = 1;
1454 srcw[0] = PRIVATE_DATA(cc);
1455 SLJIT_ASSERT(srcw[0] != 0);
1456 cc += 1 + LINK_SIZE;
1457 break;
1458
1459 case OP_CBRA:
1460 case OP_SCBRA:
1461 if (common->optimized_cbracket[GET2(cc, 1 + LINK_SIZE)] == 0)
1462 {
1463 count = 1;
1464 srcw[0] = OVECTOR_PRIV(GET2(cc, 1 + LINK_SIZE));
1465 }
1466 cc += 1 + LINK_SIZE + IMM2_SIZE;
1467 break;
1468
1469 case OP_CBRAPOS:
1470 case OP_SCBRAPOS:
1471 count = 2;
1472 srcw[0] = PRIVATE_DATA(cc);
1473 srcw[1] = OVECTOR_PRIV(GET2(cc, 1 + LINK_SIZE));
1474 SLJIT_ASSERT(srcw[0] != 0 && srcw[1] != 0);
1475 cc += 1 + LINK_SIZE + IMM2_SIZE;
1476 break;
1477
1478 case OP_COND:
1479 /* Might be a hidden SCOND. */
1480 alternative = cc + GET(cc, 1);
1481 if (*alternative == OP_KETRMAX || *alternative == OP_KETRMIN)
1482 {
1483 count = 1;
1484 srcw[0] = PRIVATE_DATA(cc);
1485 SLJIT_ASSERT(srcw[0] != 0);
1486 }
1487 cc += 1 + LINK_SIZE;
1488 break;
1489
1490 CASE_ITERATOR_PRIVATE_DATA_1
1491 if (PRIVATE_DATA(cc))
1492 {
1493 count = 1;
1494 srcw[0] = PRIVATE_DATA(cc);
1495 }
1496 cc += 2;
1497 #ifdef SUPPORT_UTF
1498 if (common->utf && HAS_EXTRALEN(cc[-1])) cc += GET_EXTRALEN(cc[-1]);
1499 #endif
1500 break;
1501
1502 CASE_ITERATOR_PRIVATE_DATA_2A
1503 if (PRIVATE_DATA(cc))
1504 {
1505 count = 2;
1506 srcw[0] = PRIVATE_DATA(cc);
1507 srcw[1] = PRIVATE_DATA(cc) + sizeof(sljit_w);
1508 }
1509 cc += 2;
1510 #ifdef SUPPORT_UTF
1511 if (common->utf && HAS_EXTRALEN(cc[-1])) cc += GET_EXTRALEN(cc[-1]);
1512 #endif
1513 break;
1514
1515 CASE_ITERATOR_PRIVATE_DATA_2B
1516 if (PRIVATE_DATA(cc))
1517 {
1518 count = 2;
1519 srcw[0] = PRIVATE_DATA(cc);
1520 srcw[1] = PRIVATE_DATA(cc) + sizeof(sljit_w);
1521 }
1522 cc += 2 + IMM2_SIZE;
1523 #ifdef SUPPORT_UTF
1524 if (common->utf && HAS_EXTRALEN(cc[-1])) cc += GET_EXTRALEN(cc[-1]);
1525 #endif
1526 break;
1527
1528 CASE_ITERATOR_TYPE_PRIVATE_DATA_1
1529 if (PRIVATE_DATA(cc))
1530 {
1531 count = 1;
1532 srcw[0] = PRIVATE_DATA(cc);
1533 }
1534 cc += 1;
1535 break;
1536
1537 CASE_ITERATOR_TYPE_PRIVATE_DATA_2A
1538 if (PRIVATE_DATA(cc))
1539 {
1540 count = 2;
1541 srcw[0] = PRIVATE_DATA(cc);
1542 srcw[1] = srcw[0] + sizeof(sljit_w);
1543 }
1544 cc += 1;
1545 break;
1546
1547 CASE_ITERATOR_TYPE_PRIVATE_DATA_2B
1548 if (PRIVATE_DATA(cc))
1549 {
1550 count = 2;
1551 srcw[0] = PRIVATE_DATA(cc);
1552 srcw[1] = srcw[0] + sizeof(sljit_w);
1553 }
1554 cc += 1 + IMM2_SIZE;
1555 break;
1556
1557 case OP_CLASS:
1558 case OP_NCLASS:
1559 #if defined SUPPORT_UTF || !defined COMPILE_PCRE8
1560 case OP_XCLASS:
1561 size = (*cc == OP_XCLASS) ? GET(cc, 1) : 1 + 32 / (int)sizeof(pcre_uchar);
1562 #else
1563 size = 1 + 32 / (int)sizeof(pcre_uchar);
1564 #endif
1565 if (PRIVATE_DATA(cc))
1566 switch(get_class_iterator_size(cc + size))
1567 {
1568 case 1:
1569 count = 1;
1570 srcw[0] = PRIVATE_DATA(cc);
1571 break;
1572
1573 case 2:
1574 count = 2;
1575 srcw[0] = PRIVATE_DATA(cc);
1576 srcw[1] = srcw[0] + sizeof(sljit_w);
1577 break;
1578
1579 default:
1580 SLJIT_ASSERT_STOP();
1581 break;
1582 }
1583 cc += size;
1584 break;
1585
1586 default:
1587 cc = next_opcode(common, cc);
1588 SLJIT_ASSERT(cc != NULL);
1589 break;
1590 }
1591 break;
1592
1593 case end:
1594 SLJIT_ASSERT_STOP();
1595 break;
1596 }
1597
1598 while (count > 0)
1599 {
1600 count--;
1601 if (save)
1602 {
1603 if (tmp1next)
1604 {
1605 if (!tmp1empty)
1606 {
1607 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), stackptr, TMP1, 0);
1608 stackptr += sizeof(sljit_w);
1609 }
1610 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), srcw[count]);
1611 tmp1empty = FALSE;
1612 tmp1next = FALSE;
1613 }
1614 else
1615 {
1616 if (!tmp2empty)
1617 {
1618 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), stackptr, TMP2, 0);
1619 stackptr += sizeof(sljit_w);
1620 }
1621 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), srcw[count]);
1622 tmp2empty = FALSE;
1623 tmp1next = TRUE;
1624 }
1625 }
1626 else
1627 {
1628 if (tmp1next)
1629 {
1630 SLJIT_ASSERT(!tmp1empty);
1631 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), srcw[count], TMP1, 0);
1632 tmp1empty = stackptr >= stacktop;
1633 if (!tmp1empty)
1634 {
1635 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(STACK_TOP), stackptr);
1636 stackptr += sizeof(sljit_w);
1637 }
1638 tmp1next = FALSE;
1639 }
1640 else
1641 {
1642 SLJIT_ASSERT(!tmp2empty);
1643 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), srcw[count], TMP2, 0);
1644 tmp2empty = stackptr >= stacktop;
1645 if (!tmp2empty)
1646 {
1647 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(STACK_TOP), stackptr);
1648 stackptr += sizeof(sljit_w);
1649 }
1650 tmp1next = TRUE;
1651 }
1652 }
1653 }
1654 }
1655
1656 if (save)
1657 {
1658 if (tmp1next)
1659 {
1660 if (!tmp1empty)
1661 {
1662 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), stackptr, TMP1, 0);
1663 stackptr += sizeof(sljit_w);
1664 }
1665 if (!tmp2empty)
1666 {
1667 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), stackptr, TMP2, 0);
1668 stackptr += sizeof(sljit_w);
1669 }
1670 }
1671 else
1672 {
1673 if (!tmp2empty)
1674 {
1675 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), stackptr, TMP2, 0);
1676 stackptr += sizeof(sljit_w);
1677 }
1678 if (!tmp1empty)
1679 {
1680 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), stackptr, TMP1, 0);
1681 stackptr += sizeof(sljit_w);
1682 }
1683 }
1684 }
1685 SLJIT_ASSERT(cc == ccend && stackptr == stacktop && (save || (tmp1empty && tmp2empty)));
1686 }
1687
1688 #undef CASE_ITERATOR_PRIVATE_DATA_1
1689 #undef CASE_ITERATOR_PRIVATE_DATA_2A
1690 #undef CASE_ITERATOR_PRIVATE_DATA_2B
1691 #undef CASE_ITERATOR_TYPE_PRIVATE_DATA_1
1692 #undef CASE_ITERATOR_TYPE_PRIVATE_DATA_2A
1693 #undef CASE_ITERATOR_TYPE_PRIVATE_DATA_2B
1694
1695 static SLJIT_INLINE BOOL ispowerof2(unsigned int value)
1696 {
1697 return (value & (value - 1)) == 0;
1698 }
1699
1700 static SLJIT_INLINE void set_jumps(jump_list *list, struct sljit_label *label)
1701 {
1702 while (list)
1703 {
1704 /* sljit_set_label is clever enough to do nothing
1705 if either the jump or the label is NULL. */
1706 sljit_set_label(list->jump, label);
1707 list = list->next;
1708 }
1709 }
1710
1711 static SLJIT_INLINE void add_jump(struct sljit_compiler *compiler, jump_list **list, struct sljit_jump* jump)
1712 {
1713 jump_list *list_item = sljit_alloc_memory(compiler, sizeof(jump_list));
1714 if (list_item)
1715 {
1716 list_item->next = *list;
1717 list_item->jump = jump;
1718 *list = list_item;
1719 }
1720 }
1721
1722 static void add_stub(compiler_common *common, enum stub_types type, int data, struct sljit_jump *start)
1723 {
1724 DEFINE_COMPILER;
1725 stub_list* list_item = sljit_alloc_memory(compiler, sizeof(stub_list));
1726
1727 if (list_item)
1728 {
1729 list_item->type = type;
1730 list_item->data = data;
1731 list_item->start = start;
1732 list_item->quit = LABEL();
1733 list_item->next = common->stubs;
1734 common->stubs = list_item;
1735 }
1736 }
1737
1738 static void flush_stubs(compiler_common *common)
1739 {
1740 DEFINE_COMPILER;
1741 stub_list* list_item = common->stubs;
1742
1743 while (list_item)
1744 {
1745 JUMPHERE(list_item->start);
1746 switch(list_item->type)
1747 {
1748 case stack_alloc:
1749 add_jump(compiler, &common->stackalloc, JUMP(SLJIT_FAST_CALL));
1750 break;
1751 }
1752 JUMPTO(SLJIT_JUMP, list_item->quit);
1753 list_item = list_item->next;
1754 }
1755 common->stubs = NULL;
1756 }
1757
1758 static SLJIT_INLINE void decrease_call_count(compiler_common *common)
1759 {
1760 DEFINE_COMPILER;
1761
1762 OP2(SLJIT_SUB | SLJIT_SET_E, CALL_COUNT, 0, CALL_COUNT, 0, SLJIT_IMM, 1);
1763 add_jump(compiler, &common->calllimit, JUMP(SLJIT_C_ZERO));
1764 }
1765
1766 static SLJIT_INLINE void allocate_stack(compiler_common *common, int size)
1767 {
1768 /* May destroy all locals and registers except TMP2. */
1769 DEFINE_COMPILER;
1770
1771 OP2(SLJIT_ADD, STACK_TOP, 0, STACK_TOP, 0, SLJIT_IMM, size * sizeof(sljit_w));
1772 #ifdef DESTROY_REGISTERS
1773 OP1(SLJIT_MOV, TMP1, 0, SLJIT_IMM, 12345);
1774 OP1(SLJIT_MOV, TMP3, 0, TMP1, 0);
1775 OP1(SLJIT_MOV, RETURN_ADDR, 0, TMP1, 0);
1776 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS0, TMP1, 0);
1777 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS1, TMP1, 0);
1778 #endif
1779 add_stub(common, stack_alloc, 0, CMP(SLJIT_C_GREATER, STACK_TOP, 0, STACK_LIMIT, 0));
1780 }
1781
1782 static SLJIT_INLINE void free_stack(compiler_common *common, int size)
1783 {
1784 DEFINE_COMPILER;
1785 OP2(SLJIT_SUB, STACK_TOP, 0, STACK_TOP, 0, SLJIT_IMM, size * sizeof(sljit_w));
1786 }
1787
1788 static SLJIT_INLINE void reset_ovector(compiler_common *common, int length)
1789 {
1790 DEFINE_COMPILER;
1791 struct sljit_label *loop;
1792 int i;
1793 /* At this point we can freely use all temporary registers. */
1794 /* TMP1 returns with begin - 1. */
1795 OP2(SLJIT_SUB, SLJIT_TEMPORARY_REG1, 0, SLJIT_MEM1(SLJIT_SAVED_REG1), SLJIT_OFFSETOF(jit_arguments, begin), SLJIT_IMM, IN_UCHARS(1));
1796 if (length < 8)
1797 {
1798 for (i = 0; i < length; i++)
1799 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(i), SLJIT_TEMPORARY_REG1, 0);
1800 }
1801 else
1802 {
1803 GET_LOCAL_BASE(SLJIT_TEMPORARY_REG2, 0, OVECTOR_START - sizeof(sljit_w));
1804 OP1(SLJIT_MOV, SLJIT_TEMPORARY_REG3, 0, SLJIT_IMM, length);
1805 loop = LABEL();
1806 OP1(SLJIT_MOVU, SLJIT_MEM1(SLJIT_TEMPORARY_REG2), sizeof(sljit_w), SLJIT_TEMPORARY_REG1, 0);
1807 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_TEMPORARY_REG3, 0, SLJIT_TEMPORARY_REG3, 0, SLJIT_IMM, 1);
1808 JUMPTO(SLJIT_C_NOT_ZERO, loop);
1809 }
1810 }
1811
1812 static SLJIT_INLINE void copy_ovector(compiler_common *common, int topbracket)
1813 {
1814 DEFINE_COMPILER;
1815 struct sljit_label *loop;
1816 struct sljit_jump *earlyexit;
1817
1818 /* At this point we can freely use all registers. */
1819 OP1(SLJIT_MOV, SLJIT_SAVED_REG3, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(1));
1820 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(1), STR_PTR, 0);
1821
1822 OP1(SLJIT_MOV, SLJIT_TEMPORARY_REG1, 0, ARGUMENTS, 0);
1823 if (common->mark_ptr != 0)
1824 OP1(SLJIT_MOV, SLJIT_TEMPORARY_REG3, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), common->mark_ptr);
1825 OP1(SLJIT_MOV_SI, SLJIT_TEMPORARY_REG2, 0, SLJIT_MEM1(SLJIT_TEMPORARY_REG1), SLJIT_OFFSETOF(jit_arguments, offsetcount));
1826 if (common->mark_ptr != 0)
1827 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_TEMPORARY_REG1), SLJIT_OFFSETOF(jit_arguments, mark_ptr), SLJIT_TEMPORARY_REG3, 0);
1828 OP2(SLJIT_SUB, SLJIT_TEMPORARY_REG3, 0, SLJIT_MEM1(SLJIT_TEMPORARY_REG1), SLJIT_OFFSETOF(jit_arguments, offsets), SLJIT_IMM, sizeof(int));
1829 OP1(SLJIT_MOV, SLJIT_TEMPORARY_REG1, 0, SLJIT_MEM1(SLJIT_TEMPORARY_REG1), SLJIT_OFFSETOF(jit_arguments, begin));
1830 GET_LOCAL_BASE(SLJIT_SAVED_REG1, 0, OVECTOR_START);
1831 /* Unlikely, but possible */
1832 earlyexit = CMP(SLJIT_C_EQUAL, SLJIT_TEMPORARY_REG2, 0, SLJIT_IMM, 0);
1833 loop = LABEL();
1834 OP2(SLJIT_SUB, SLJIT_SAVED_REG2, 0, SLJIT_MEM1(SLJIT_SAVED_REG1), 0, SLJIT_TEMPORARY_REG1, 0);
1835 OP2(SLJIT_ADD, SLJIT_SAVED_REG1, 0, SLJIT_SAVED_REG1, 0, SLJIT_IMM, sizeof(sljit_w));
1836 /* Copy the integer value to the output buffer */
1837 #ifdef COMPILE_PCRE16
1838 OP2(SLJIT_ASHR, SLJIT_SAVED_REG2, 0, SLJIT_SAVED_REG2, 0, SLJIT_IMM, 1);
1839 #endif
1840 OP1(SLJIT_MOVU_SI, SLJIT_MEM1(SLJIT_TEMPORARY_REG3), sizeof(int), SLJIT_SAVED_REG2, 0);
1841 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_TEMPORARY_REG2, 0, SLJIT_TEMPORARY_REG2, 0, SLJIT_IMM, 1);
1842 JUMPTO(SLJIT_C_NOT_ZERO, loop);
1843 JUMPHERE(earlyexit);
1844
1845 /* Calculate the return value, which is the maximum ovector value. */
1846 if (topbracket > 1)
1847 {
1848 GET_LOCAL_BASE(SLJIT_TEMPORARY_REG1, 0, OVECTOR_START + topbracket * 2 * sizeof(sljit_w));
1849 OP1(SLJIT_MOV, SLJIT_TEMPORARY_REG2, 0, SLJIT_IMM, topbracket + 1);
1850
1851 /* OVECTOR(0) is never equal to SLJIT_SAVED_REG3. */
1852 loop = LABEL();
1853 OP1(SLJIT_MOVU, SLJIT_TEMPORARY_REG3, 0, SLJIT_MEM1(SLJIT_TEMPORARY_REG1), -(2 * (sljit_w)sizeof(sljit_w)));
1854 OP2(SLJIT_SUB, SLJIT_TEMPORARY_REG2, 0, SLJIT_TEMPORARY_REG2, 0, SLJIT_IMM, 1);
1855 CMPTO(SLJIT_C_EQUAL, SLJIT_TEMPORARY_REG3, 0, SLJIT_SAVED_REG3, 0, loop);
1856 OP1(SLJIT_MOV, SLJIT_RETURN_REG, 0, SLJIT_TEMPORARY_REG2, 0);
1857 }
1858 else
1859 OP1(SLJIT_MOV, SLJIT_RETURN_REG, 0, SLJIT_IMM, 1);
1860 }
1861
1862 static SLJIT_INLINE void return_with_partial_match(compiler_common *common, struct sljit_label *quit)
1863 {
1864 DEFINE_COMPILER;
1865
1866 SLJIT_COMPILE_ASSERT(STR_END == SLJIT_SAVED_REG2, str_end_must_be_saved_reg2);
1867 SLJIT_ASSERT(common->start_used_ptr != 0 && (common->mode == JIT_PARTIAL_SOFT_COMPILE ? common->hit_start != 0 : common->hit_start == 0));
1868
1869 OP1(SLJIT_MOV, SLJIT_TEMPORARY_REG2, 0, ARGUMENTS, 0);
1870 OP1(SLJIT_MOV, SLJIT_RETURN_REG, 0, SLJIT_IMM, PCRE_ERROR_PARTIAL);
1871 OP1(SLJIT_MOV_SI, SLJIT_TEMPORARY_REG3, 0, SLJIT_MEM1(SLJIT_TEMPORARY_REG2), SLJIT_OFFSETOF(jit_arguments, offsetcount));
1872 CMPTO(SLJIT_C_LESS, SLJIT_TEMPORARY_REG3, 0, SLJIT_IMM, 2, quit);
1873
1874 /* Store match begin and end. */
1875 OP1(SLJIT_MOV, SLJIT_SAVED_REG1, 0, SLJIT_MEM1(SLJIT_TEMPORARY_REG2), SLJIT_OFFSETOF(jit_arguments, begin));
1876 OP1(SLJIT_MOV, SLJIT_TEMPORARY_REG2, 0, SLJIT_MEM1(SLJIT_TEMPORARY_REG2), SLJIT_OFFSETOF(jit_arguments, offsets));
1877 OP1(SLJIT_MOV, SLJIT_TEMPORARY_REG3, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), common->mode == JIT_PARTIAL_HARD_COMPILE ? common->start_used_ptr : common->hit_start);
1878 OP2(SLJIT_SUB, SLJIT_SAVED_REG2, 0, STR_END, 0, SLJIT_SAVED_REG1, 0);
1879 #ifdef COMPILE_PCRE16
1880 OP2(SLJIT_ASHR, SLJIT_SAVED_REG2, 0, SLJIT_SAVED_REG2, 0, SLJIT_IMM, 1);
1881 #endif
1882 OP1(SLJIT_MOV_SI, SLJIT_MEM1(SLJIT_TEMPORARY_REG2), sizeof(int), SLJIT_SAVED_REG2, 0);
1883
1884 OP2(SLJIT_SUB, SLJIT_TEMPORARY_REG3, 0, SLJIT_TEMPORARY_REG3, 0, SLJIT_SAVED_REG1, 0);
1885 #ifdef COMPILE_PCRE16
1886 OP2(SLJIT_ASHR, SLJIT_TEMPORARY_REG3, 0, SLJIT_TEMPORARY_REG3, 0, SLJIT_IMM, 1);
1887 #endif
1888 OP1(SLJIT_MOV_SI, SLJIT_MEM1(SLJIT_TEMPORARY_REG2), 0, SLJIT_TEMPORARY_REG3, 0);
1889
1890 JUMPTO(SLJIT_JUMP, quit);
1891 }
1892
1893 static SLJIT_INLINE void check_start_used_ptr(compiler_common *common)
1894 {
1895 /* May destroy TMP1. */
1896 DEFINE_COMPILER;
1897 struct sljit_jump *jump;
1898
1899 if (common->mode == JIT_PARTIAL_SOFT_COMPILE)
1900 {
1901 /* The value of -1 must be kept for start_used_ptr! */
1902 OP2(SLJIT_ADD, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), common->start_used_ptr, SLJIT_IMM, 1);
1903 /* Jumps if start_used_ptr < STR_PTR, or start_used_ptr == -1. Although overwriting
1904 is not necessary if start_used_ptr == STR_PTR, it does not hurt as well. */
1905 jump = CMP(SLJIT_C_LESS_EQUAL, TMP1, 0, STR_PTR, 0);
1906 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), common->start_used_ptr, STR_PTR, 0);
1907 JUMPHERE(jump);
1908 }
1909 else if (common->mode == JIT_PARTIAL_HARD_COMPILE)
1910 {
1911 jump = CMP(SLJIT_C_LESS_EQUAL, SLJIT_MEM1(SLJIT_LOCALS_REG), common->start_used_ptr, STR_PTR, 0);
1912 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), common->start_used_ptr, STR_PTR, 0);
1913 JUMPHERE(jump);
1914 }
1915 }
1916
1917 static SLJIT_INLINE BOOL char_has_othercase(compiler_common *common, pcre_uchar* cc)
1918 {
1919 /* Detects if the character has an othercase. */
1920 unsigned int c;
1921
1922 #ifdef SUPPORT_UTF
1923 if (common->utf)
1924 {
1925 GETCHAR(c, cc);
1926 if (c > 127)
1927 {
1928 #ifdef SUPPORT_UCP
1929 return c != UCD_OTHERCASE(c);
1930 #else
1931 return FALSE;
1932 #endif
1933 }
1934 #ifndef COMPILE_PCRE8
1935 return common->fcc[c] != c;
1936 #endif
1937 }
1938 else
1939 #endif
1940 c = *cc;
1941 return MAX_255(c) ? common->fcc[c] != c : FALSE;
1942 }
1943
1944 static SLJIT_INLINE unsigned int char_othercase(compiler_common *common, unsigned int c)
1945 {
1946 /* Returns with the othercase. */
1947 #ifdef SUPPORT_UTF
1948 if (common->utf && c > 127)
1949 {
1950 #ifdef SUPPORT_UCP
1951 return UCD_OTHERCASE(c);
1952 #else
1953 return c;
1954 #endif
1955 }
1956 #endif
1957 return TABLE_GET(c, common->fcc, c);
1958 }
1959
1960 static unsigned int char_get_othercase_bit(compiler_common *common, pcre_uchar* cc)
1961 {
1962 /* Detects if the character and its othercase has only 1 bit difference. */
1963 unsigned int c, oc, bit;
1964 #if defined SUPPORT_UTF && defined COMPILE_PCRE8
1965 int n;
1966 #endif
1967
1968 #ifdef SUPPORT_UTF
1969 if (common->utf)
1970 {
1971 GETCHAR(c, cc);
1972 if (c <= 127)
1973 oc = common->fcc[c];
1974 else
1975 {
1976 #ifdef SUPPORT_UCP
1977 oc = UCD_OTHERCASE(c);
1978 #else
1979 oc = c;
1980 #endif
1981 }
1982 }
1983 else
1984 {
1985 c = *cc;
1986 oc = TABLE_GET(c, common->fcc, c);
1987 }
1988 #else
1989 c = *cc;
1990 oc = TABLE_GET(c, common->fcc, c);
1991 #endif
1992
1993 SLJIT_ASSERT(c != oc);
1994
1995 bit = c ^ oc;
1996 /* Optimized for English alphabet. */
1997 if (c <= 127 && bit == 0x20)
1998 return (0 << 8) | 0x20;
1999
2000 /* Since c != oc, they must have at least 1 bit difference. */
2001 if (!ispowerof2(bit))
2002 return 0;
2003
2004 #ifdef COMPILE_PCRE8
2005
2006 #ifdef SUPPORT_UTF
2007 if (common->utf && c > 127)
2008 {
2009 n = GET_EXTRALEN(*cc);
2010 while ((bit & 0x3f) == 0)
2011 {
2012 n--;
2013 bit >>= 6;
2014 }
2015 return (n << 8) | bit;
2016 }
2017 #endif /* SUPPORT_UTF */
2018 return (0 << 8) | bit;
2019
2020 #else /* COMPILE_PCRE8 */
2021
2022 #ifdef COMPILE_PCRE16
2023 #ifdef SUPPORT_UTF
2024 if (common->utf && c > 65535)
2025 {
2026 if (bit >= (1 << 10))
2027 bit >>= 10;
2028 else
2029 return (bit < 256) ? ((2 << 8) | bit) : ((3 << 8) | (bit >> 8));
2030 }
2031 #endif /* SUPPORT_UTF */
2032 return (bit < 256) ? ((0 << 8) | bit) : ((1 << 8) | (bit >> 8));
2033 #endif /* COMPILE_PCRE16 */
2034
2035 #endif /* COMPILE_PCRE8 */
2036 }
2037
2038 static void check_partial(compiler_common *common, BOOL force)
2039 {
2040 /* Checks whether a partial matching is occured. Does not modify registers. */
2041 DEFINE_COMPILER;
2042 struct sljit_jump *jump = NULL;
2043
2044 SLJIT_ASSERT(!force || common->mode != JIT_COMPILE);
2045
2046 if (common->mode == JIT_COMPILE)
2047 return;
2048
2049 if (!force)
2050 jump = CMP(SLJIT_C_GREATER_EQUAL, SLJIT_MEM1(SLJIT_LOCALS_REG), common->start_used_ptr, STR_PTR, 0);
2051 else if (common->mode == JIT_PARTIAL_SOFT_COMPILE)
2052 jump = CMP(SLJIT_C_EQUAL, SLJIT_MEM1(SLJIT_LOCALS_REG), common->start_used_ptr, SLJIT_IMM, -1);
2053
2054 if (common->mode == JIT_PARTIAL_SOFT_COMPILE)
2055 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), common->hit_start, SLJIT_IMM, -1);
2056 else
2057 {
2058 if (common->partialmatchlabel != NULL)
2059 JUMPTO(SLJIT_JUMP, common->partialmatchlabel);
2060 else
2061 add_jump(compiler, &common->partialmatch, JUMP(SLJIT_JUMP));
2062 }
2063
2064 if (jump != NULL)
2065 JUMPHERE(jump);
2066 }
2067
2068 static struct sljit_jump *check_str_end(compiler_common *common)
2069 {
2070 /* Does not affect registers. Usually used in a tight spot. */
2071 DEFINE_COMPILER;
2072 struct sljit_jump *jump;
2073 struct sljit_jump *nohit;
2074 struct sljit_jump *return_value;
2075
2076 if (common->mode == JIT_COMPILE)
2077 return CMP(SLJIT_C_GREATER_EQUAL, STR_PTR, 0, STR_END, 0);
2078
2079 jump = CMP(SLJIT_C_LESS, STR_PTR, 0, STR_END, 0);
2080 if (common->mode == JIT_PARTIAL_SOFT_COMPILE)
2081 {
2082 nohit = CMP(SLJIT_C_GREATER_EQUAL, SLJIT_MEM1(SLJIT_LOCALS_REG), common->start_used_ptr, STR_PTR, 0);
2083 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), common->hit_start, SLJIT_IMM, -1);
2084 JUMPHERE(nohit);
2085 return_value = JUMP(SLJIT_JUMP);
2086 }
2087 else
2088 {
2089 return_value = CMP(SLJIT_C_GREATER_EQUAL, SLJIT_MEM1(SLJIT_LOCALS_REG), common->start_used_ptr, STR_PTR, 0);
2090 if (common->partialmatchlabel != NULL)
2091 JUMPTO(SLJIT_JUMP, common->partialmatchlabel);
2092 else
2093 add_jump(compiler, &common->partialmatch, JUMP(SLJIT_JUMP));
2094 }
2095 JUMPHERE(jump);
2096 return return_value;
2097 }
2098
2099 static void detect_partial_match(compiler_common *common, jump_list **backtracks)
2100 {
2101 DEFINE_COMPILER;
2102 struct sljit_jump *jump;
2103
2104 if (common->mode == JIT_COMPILE)
2105 {
2106 add_jump(compiler, backtracks, CMP(SLJIT_C_GREATER_EQUAL, STR_PTR, 0, STR_END, 0));
2107 return;
2108 }
2109
2110 /* Partial matching mode. */
2111 jump = CMP(SLJIT_C_LESS, STR_PTR, 0, STR_END, 0);
2112 add_jump(compiler, backtracks, CMP(SLJIT_C_GREATER_EQUAL, SLJIT_MEM1(SLJIT_LOCALS_REG), common->start_used_ptr, STR_PTR, 0));
2113 if (common->mode == JIT_PARTIAL_SOFT_COMPILE)
2114 {
2115 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), common->hit_start, SLJIT_IMM, -1);
2116 add_jump(compiler, backtracks, JUMP(SLJIT_JUMP));
2117 }
2118 else
2119 {
2120 if (common->partialmatchlabel != NULL)
2121 JUMPTO(SLJIT_JUMP, common->partialmatchlabel);
2122 else
2123 add_jump(compiler, &common->partialmatch, JUMP(SLJIT_JUMP));
2124 }
2125 JUMPHERE(jump);
2126 }
2127
2128 static void read_char(compiler_common *common)
2129 {
2130 /* Reads the character into TMP1, updates STR_PTR.
2131 Does not check STR_END. TMP2 Destroyed. */
2132 DEFINE_COMPILER;
2133 #ifdef SUPPORT_UTF
2134 struct sljit_jump *jump;
2135 #endif
2136
2137 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), 0);
2138 #ifdef SUPPORT_UTF
2139 if (common->utf)
2140 {
2141 #ifdef COMPILE_PCRE8
2142 jump = CMP(SLJIT_C_LESS, TMP1, 0, SLJIT_IMM, 0xc0);
2143 #else
2144 #ifdef COMPILE_PCRE16
2145 jump = CMP(SLJIT_C_LESS, TMP1, 0, SLJIT_IMM, 0xd800);
2146 #endif
2147 #endif /* COMPILE_PCRE8 */
2148 add_jump(compiler, &common->utfreadchar, JUMP(SLJIT_FAST_CALL));
2149 JUMPHERE(jump);
2150 }
2151 #endif
2152 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
2153 }
2154
2155 static void peek_char(compiler_common *common)
2156 {
2157 /* Reads the character into TMP1, keeps STR_PTR.
2158 Does not check STR_END. TMP2 Destroyed. */
2159 DEFINE_COMPILER;
2160 #ifdef SUPPORT_UTF
2161 struct sljit_jump *jump;
2162 #endif
2163
2164 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), 0);
2165 #ifdef SUPPORT_UTF
2166 if (common->utf)
2167 {
2168 #ifdef COMPILE_PCRE8
2169 jump = CMP(SLJIT_C_LESS, TMP1, 0, SLJIT_IMM, 0xc0);
2170 #else
2171 #ifdef COMPILE_PCRE16
2172 jump = CMP(SLJIT_C_LESS, TMP1, 0, SLJIT_IMM, 0xd800);
2173 #endif
2174 #endif /* COMPILE_PCRE8 */
2175 add_jump(compiler, &common->utfreadchar, JUMP(SLJIT_FAST_CALL));
2176 OP2(SLJIT_SUB, STR_PTR, 0, STR_PTR, 0, TMP2, 0);
2177 JUMPHERE(jump);
2178 }
2179 #endif
2180 }
2181
2182 static void read_char8_type(compiler_common *common)
2183 {
2184 /* Reads the character type into TMP1, updates STR_PTR. Does not check STR_END. */
2185 DEFINE_COMPILER;
2186 #if defined SUPPORT_UTF || defined COMPILE_PCRE16
2187 struct sljit_jump *jump;
2188 #endif
2189
2190 #ifdef SUPPORT_UTF
2191 if (common->utf)
2192 {
2193 OP1(MOV_UCHAR, TMP2, 0, SLJIT_MEM1(STR_PTR), 0);
2194 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
2195 #ifdef COMPILE_PCRE8
2196 /* This can be an extra read in some situations, but hopefully
2197 it is needed in most cases. */
2198 OP1(SLJIT_MOV_UB, TMP1, 0, SLJIT_MEM1(TMP2), common->ctypes);
2199 jump = CMP(SLJIT_C_LESS, TMP2, 0, SLJIT_IMM, 0xc0);
2200 add_jump(compiler, &common->utfreadtype8, JUMP(SLJIT_FAST_CALL));
2201 JUMPHERE(jump);
2202 #else
2203 #ifdef COMPILE_PCRE16
2204 OP1(SLJIT_MOV, TMP1, 0, SLJIT_IMM, 0);
2205 jump = CMP(SLJIT_C_GREATER, TMP2, 0, SLJIT_IMM, 255);
2206 OP1(SLJIT_MOV_UB, TMP1, 0, SLJIT_MEM1(TMP2), common->ctypes);
2207 JUMPHERE(jump);
2208 /* Skip low surrogate if necessary. */
2209 OP2(SLJIT_AND, TMP2, 0, TMP2, 0, SLJIT_IMM, 0xfc00);
2210 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP2, 0, SLJIT_IMM, 0xd800);
2211 COND_VALUE(SLJIT_MOV, TMP2, 0, SLJIT_C_EQUAL);
2212 OP2(SLJIT_SHL, TMP2, 0, TMP2, 0, SLJIT_IMM, 1);
2213 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, TMP2, 0);
2214 #endif
2215 #endif /* COMPILE_PCRE8 */
2216 return;
2217 }
2218 #endif
2219 OP1(MOV_UCHAR, TMP2, 0, SLJIT_MEM1(STR_PTR), 0);
2220 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
2221 #ifdef COMPILE_PCRE16
2222 /* The ctypes array contains only 256 values. */
2223 OP1(SLJIT_MOV, TMP1, 0, SLJIT_IMM, 0);
2224 jump = CMP(SLJIT_C_GREATER, TMP2, 0, SLJIT_IMM, 255);
2225 #endif
2226 OP1(SLJIT_MOV_UB, TMP1, 0, SLJIT_MEM1(TMP2), common->ctypes);
2227 #ifdef COMPILE_PCRE16
2228 JUMPHERE(jump);
2229 #endif
2230 }
2231
2232 static void skip_char_back(compiler_common *common)
2233 {
2234 /* Goes one character back. Affects STR_PTR and TMP1. Does not check begin. */
2235 DEFINE_COMPILER;
2236 #if defined SUPPORT_UTF && defined COMPILE_PCRE8
2237 struct sljit_label *label;
2238
2239 if (common->utf)
2240 {
2241 label = LABEL();
2242 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), -IN_UCHARS(1));
2243 OP2(SLJIT_SUB, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
2244 OP2(SLJIT_AND, TMP1, 0, TMP1, 0, SLJIT_IMM, 0xc0);
2245 CMPTO(SLJIT_C_EQUAL, TMP1, 0, SLJIT_IMM, 0x80, label);
2246 return;
2247 }
2248 #endif
2249 #if defined SUPPORT_UTF && defined COMPILE_PCRE16
2250 if (common->utf)
2251 {
2252 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), -IN_UCHARS(1));
2253 OP2(SLJIT_SUB, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
2254 /* Skip low surrogate if necessary. */
2255 OP2(SLJIT_AND, TMP1, 0, TMP1, 0, SLJIT_IMM, 0xfc00);
2256 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0xdc00);
2257 COND_VALUE(SLJIT_MOV, TMP1, 0, SLJIT_C_EQUAL);
2258 OP2(SLJIT_SHL, TMP1, 0, TMP1, 0, SLJIT_IMM, 1);
2259 OP2(SLJIT_SUB, STR_PTR, 0, STR_PTR, 0, TMP1, 0);
2260 return;
2261 }
2262 #endif
2263 OP2(SLJIT_SUB, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
2264 }
2265
2266 static void check_newlinechar(compiler_common *common, int nltype, jump_list **backtracks, BOOL jumpiftrue)
2267 {
2268 /* Character comes in TMP1. Checks if it is a newline. TMP2 may be destroyed. */
2269 DEFINE_COMPILER;
2270
2271 if (nltype == NLTYPE_ANY)
2272 {
2273 add_jump(compiler, &common->anynewline, JUMP(SLJIT_FAST_CALL));
2274 add_jump(compiler, backtracks, JUMP(jumpiftrue ? SLJIT_C_NOT_ZERO : SLJIT_C_ZERO));
2275 }
2276 else if (nltype == NLTYPE_ANYCRLF)
2277 {
2278 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, CHAR_CR);
2279 COND_VALUE(SLJIT_MOV, TMP2, 0, SLJIT_C_EQUAL);
2280 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, CHAR_NL);
2281 COND_VALUE(SLJIT_OR | SLJIT_SET_E, TMP2, 0, SLJIT_C_EQUAL);
2282 add_jump(compiler, backtracks, JUMP(jumpiftrue ? SLJIT_C_NOT_ZERO : SLJIT_C_ZERO));
2283 }
2284 else
2285 {
2286 SLJIT_ASSERT(nltype == NLTYPE_FIXED && common->newline < 256);
2287 add_jump(compiler, backtracks, CMP(jumpiftrue ? SLJIT_C_EQUAL : SLJIT_C_NOT_EQUAL, TMP1, 0, SLJIT_IMM, common->newline));
2288 }
2289 }
2290
2291 #ifdef SUPPORT_UTF
2292
2293 #ifdef COMPILE_PCRE8
2294 static void do_utfreadchar(compiler_common *common)
2295 {
2296 /* Fast decoding a UTF-8 character. TMP1 contains the first byte
2297 of the character (>= 0xc0). Return char value in TMP1, length - 1 in TMP2. */
2298 DEFINE_COMPILER;
2299 struct sljit_jump *jump;
2300
2301 sljit_emit_fast_enter(compiler, RETURN_ADDR, 0);
2302 /* Searching for the first zero. */
2303 OP2(SLJIT_AND | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0x20);
2304 jump = JUMP(SLJIT_C_NOT_ZERO);
2305 /* Two byte sequence. */
2306 OP1(MOV_UCHAR, TMP2, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(1));
2307 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
2308 OP2(SLJIT_AND, TMP1, 0, TMP1, 0, SLJIT_IMM, 0x1f);
2309 OP2(SLJIT_SHL, TMP1, 0, TMP1, 0, SLJIT_IMM, 6);
2310 OP2(SLJIT_AND, TMP2, 0, TMP2, 0, SLJIT_IMM, 0x3f);
2311 OP2(SLJIT_OR, TMP1, 0, TMP1, 0, TMP2, 0);
2312 OP1(SLJIT_MOV, TMP2, 0, SLJIT_IMM, IN_UCHARS(1));
2313 sljit_emit_fast_return(compiler, RETURN_ADDR, 0);
2314 JUMPHERE(jump);
2315
2316 OP2(SLJIT_AND | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0x10);
2317 jump = JUMP(SLJIT_C_NOT_ZERO);
2318 /* Three byte sequence. */
2319 OP1(MOV_UCHAR, TMP2, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(1));
2320 OP2(SLJIT_AND, TMP1, 0, TMP1, 0, SLJIT_IMM, 0x0f);
2321 OP2(SLJIT_SHL, TMP1, 0, TMP1, 0, SLJIT_IMM, 12);
2322 OP2(SLJIT_AND, TMP2, 0, TMP2, 0, SLJIT_IMM, 0x3f);
2323 OP2(SLJIT_SHL, TMP2, 0, TMP2, 0, SLJIT_IMM, 6);
2324 OP2(SLJIT_OR, TMP1, 0, TMP1, 0, TMP2, 0);
2325 OP1(MOV_UCHAR, TMP2, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(2));
2326 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(2));
2327 OP2(SLJIT_AND, TMP2, 0, TMP2, 0, SLJIT_IMM, 0x3f);
2328 OP2(SLJIT_OR, TMP1, 0, TMP1, 0, TMP2, 0);
2329 OP1(SLJIT_MOV, TMP2, 0, SLJIT_IMM, IN_UCHARS(2));
2330 sljit_emit_fast_return(compiler, RETURN_ADDR, 0);
2331 JUMPHERE(jump);
2332
2333 /* Four byte sequence. */
2334 OP1(MOV_UCHAR, TMP2, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(1));
2335 OP2(SLJIT_AND, TMP1, 0, TMP1, 0, SLJIT_IMM, 0x07);
2336 OP2(SLJIT_SHL, TMP1, 0, TMP1, 0, SLJIT_IMM, 18);
2337 OP2(SLJIT_AND, TMP2, 0, TMP2, 0, SLJIT_IMM, 0x3f);
2338 OP2(SLJIT_SHL, TMP2, 0, TMP2, 0, SLJIT_IMM, 12);
2339 OP2(SLJIT_OR, TMP1, 0, TMP1, 0, TMP2, 0);
2340 OP1(MOV_UCHAR, TMP2, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(2));
2341 OP2(SLJIT_AND, TMP2, 0, TMP2, 0, SLJIT_IMM, 0x3f);
2342 OP2(SLJIT_SHL, TMP2, 0, TMP2, 0, SLJIT_IMM, 6);
2343 OP2(SLJIT_OR, TMP1, 0, TMP1, 0, TMP2, 0);
2344 OP1(MOV_UCHAR, TMP2, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(3));
2345 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(3));
2346 OP2(SLJIT_AND, TMP2, 0, TMP2, 0, SLJIT_IMM, 0x3f);
2347 OP2(SLJIT_OR, TMP1, 0, TMP1, 0, TMP2, 0);
2348 OP1(SLJIT_MOV, TMP2, 0, SLJIT_IMM, IN_UCHARS(3));
2349 sljit_emit_fast_return(compiler, RETURN_ADDR, 0);
2350 }
2351
2352 static void do_utfreadtype8(compiler_common *common)
2353 {
2354 /* Fast decoding a UTF-8 character type. TMP2 contains the first byte
2355 of the character (>= 0xc0). Return value in TMP1. */
2356 DEFINE_COMPILER;
2357 struct sljit_jump *jump;
2358 struct sljit_jump *compare;
2359
2360 sljit_emit_fast_enter(compiler, RETURN_ADDR, 0);
2361
2362 OP2(SLJIT_AND | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP2, 0, SLJIT_IMM, 0x20);
2363 jump = JUMP(SLJIT_C_NOT_ZERO);
2364 /* Two byte sequence. */
2365 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(0));
2366 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
2367 OP2(SLJIT_AND, TMP2, 0, TMP2, 0, SLJIT_IMM, 0x1f);
2368 OP2(SLJIT_SHL, TMP2, 0, TMP2, 0, SLJIT_IMM, 6);
2369 OP2(SLJIT_AND, TMP1, 0, TMP1, 0, SLJIT_IMM, 0x3f);
2370 OP2(SLJIT_OR, TMP2, 0, TMP2, 0, TMP1, 0);
2371 compare = CMP(SLJIT_C_GREATER, TMP2, 0, SLJIT_IMM, 255);
2372 OP1(SLJIT_MOV_UB, TMP1, 0, SLJIT_MEM1(TMP2), common->ctypes);
2373 sljit_emit_fast_return(compiler, RETURN_ADDR, 0);
2374
2375 JUMPHERE(compare);
2376 OP1(SLJIT_MOV, TMP1, 0, SLJIT_IMM, 0);
2377 sljit_emit_fast_return(compiler, RETURN_ADDR, 0);
2378 JUMPHERE(jump);
2379
2380 /* We only have types for characters less than 256. */
2381 OP1(SLJIT_MOV_UB, TMP1, 0, SLJIT_MEM1(TMP2), (sljit_w)PRIV(utf8_table4) - 0xc0);
2382 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, TMP1, 0);
2383 OP1(SLJIT_MOV, TMP1, 0, SLJIT_IMM, 0);
2384 sljit_emit_fast_return(compiler, RETURN_ADDR, 0);
2385 }
2386
2387 #else /* COMPILE_PCRE8 */
2388
2389 #ifdef COMPILE_PCRE16
2390 static void do_utfreadchar(compiler_common *common)
2391 {
2392 /* Fast decoding a UTF-16 character. TMP1 contains the first 16 bit char
2393 of the character (>= 0xd800). Return char value in TMP1, length - 1 in TMP2. */
2394 DEFINE_COMPILER;
2395 struct sljit_jump *jump;
2396
2397 sljit_emit_fast_enter(compiler, RETURN_ADDR, 0);
2398 jump = CMP(SLJIT_C_LESS, TMP1, 0, SLJIT_IMM, 0xdc00);
2399 /* Do nothing, only return. */
2400 sljit_emit_fast_return(compiler, RETURN_ADDR, 0);
2401
2402 JUMPHERE(jump);
2403 /* Combine two 16 bit characters. */
2404 OP1(MOV_UCHAR, TMP2, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(1));
2405 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
2406 OP2(SLJIT_AND, TMP1, 0, TMP1, 0, SLJIT_IMM, 0x3ff);
2407 OP2(SLJIT_SHL, TMP1, 0, TMP1, 0, SLJIT_IMM, 10);
2408 OP2(SLJIT_AND, TMP2, 0, TMP2, 0, SLJIT_IMM, 0x3ff);
2409 OP2(SLJIT_OR, TMP1, 0, TMP1, 0, TMP2, 0);
2410 OP1(SLJIT_MOV, TMP2, 0, SLJIT_IMM, IN_UCHARS(1));
2411 OP2(SLJIT_ADD, TMP1, 0, TMP1, 0, SLJIT_IMM, 0x10000);
2412 sljit_emit_fast_return(compiler, RETURN_ADDR, 0);
2413 }
2414 #endif /* COMPILE_PCRE16 */
2415
2416 #endif /* COMPILE_PCRE8 */
2417
2418 #endif /* SUPPORT_UTF */
2419
2420 #ifdef SUPPORT_UCP
2421
2422 /* UCD_BLOCK_SIZE must be 128 (see the assert below). */
2423 #define UCD_BLOCK_MASK 127
2424 #define UCD_BLOCK_SHIFT 7
2425
2426 static void do_getucd(compiler_common *common)
2427 {
2428 /* Search the UCD record for the character comes in TMP1.
2429 Returns chartype in TMP1 and UCD offset in TMP2. */
2430 DEFINE_COMPILER;
2431
2432 SLJIT_ASSERT(UCD_BLOCK_SIZE == 128 && sizeof(ucd_record) == 8);
2433
2434 sljit_emit_fast_enter(compiler, RETURN_ADDR, 0);
2435 OP2(SLJIT_LSHR, TMP2, 0, TMP1, 0, SLJIT_IMM, UCD_BLOCK_SHIFT);
2436 OP1(SLJIT_MOV_UB, TMP2, 0, SLJIT_MEM1(TMP2), (sljit_w)PRIV(ucd_stage1));
2437 OP2(SLJIT_AND, TMP1, 0, TMP1, 0, SLJIT_IMM, UCD_BLOCK_MASK);
2438 OP2(SLJIT_SHL, TMP2, 0, TMP2, 0, SLJIT_IMM, UCD_BLOCK_SHIFT);
2439 OP2(SLJIT_ADD, TMP1, 0, TMP1, 0, TMP2, 0);
2440 OP1(SLJIT_MOV, TMP2, 0, SLJIT_IMM, (sljit_w)PRIV(ucd_stage2));
2441 OP1(SLJIT_MOV_UH, TMP2, 0, SLJIT_MEM2(TMP2, TMP1), 1);
2442 OP1(SLJIT_MOV, TMP1, 0, SLJIT_IMM, (sljit_w)PRIV(ucd_records) + SLJIT_OFFSETOF(ucd_record, chartype));
2443 OP1(SLJIT_MOV_UB, TMP1, 0, SLJIT_MEM2(TMP1, TMP2), 3);
2444 sljit_emit_fast_return(compiler, RETURN_ADDR, 0);
2445 }
2446 #endif
2447
2448 static SLJIT_INLINE struct sljit_label *mainloop_entry(compiler_common *common, BOOL hascrorlf, BOOL firstline)
2449 {
2450 DEFINE_COMPILER;
2451 struct sljit_label *mainloop;
2452 struct sljit_label *newlinelabel = NULL;
2453 struct sljit_jump *start;
2454 struct sljit_jump *end = NULL;
2455 struct sljit_jump *nl = NULL;
2456 #ifdef SUPPORT_UTF
2457 struct sljit_jump *singlechar;
2458 #endif
2459 jump_list *newline = NULL;
2460 BOOL newlinecheck = FALSE;
2461 BOOL readuchar = FALSE;
2462
2463 if (!(hascrorlf || firstline) && (common->nltype == NLTYPE_ANY ||
2464 common->nltype == NLTYPE_ANYCRLF || common->newline > 255))
2465 newlinecheck = TRUE;
2466
2467 if (firstline)
2468 {
2469 /* Search for the end of the first line. */
2470 SLJIT_ASSERT(common->first_line_end != 0);
2471 OP1(SLJIT_MOV, TMP3, 0, STR_PTR, 0);
2472
2473 if (common->nltype == NLTYPE_FIXED && common->newline > 255)
2474 {
2475 mainloop = LABEL();
2476 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
2477 end = CMP(SLJIT_C_GREATER_EQUAL, STR_PTR, 0, STR_END, 0);
2478 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(-1));
2479 OP1(MOV_UCHAR, TMP2, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(0));
2480 CMPTO(SLJIT_C_NOT_EQUAL, TMP1, 0, SLJIT_IMM, (common->newline >> 8) & 0xff, mainloop);
2481 CMPTO(SLJIT_C_NOT_EQUAL, TMP2, 0, SLJIT_IMM, common->newline & 0xff, mainloop);
2482 JUMPHERE(end);
2483 OP2(SLJIT_SUB, SLJIT_MEM1(SLJIT_LOCALS_REG), common->first_line_end, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
2484 }
2485 else
2486 {
2487 end = CMP(SLJIT_C_GREATER_EQUAL, STR_PTR, 0, STR_END, 0);
2488 mainloop = LABEL();
2489 /* Continual stores does not cause data dependency. */
2490 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), common->first_line_end, STR_PTR, 0);
2491 read_char(common);
2492 check_newlinechar(common, common->nltype, &newline, TRUE);
2493 CMPTO(SLJIT_C_LESS, STR_PTR, 0, STR_END, 0, mainloop);
2494 JUMPHERE(end);
2495 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), common->first_line_end, STR_PTR, 0);
2496 set_jumps(newline, LABEL());
2497 }
2498
2499 OP1(SLJIT_MOV, STR_PTR, 0, TMP3, 0);
2500 }
2501
2502 start = JUMP(SLJIT_JUMP);
2503
2504 if (newlinecheck)
2505 {
2506 newlinelabel = LABEL();
2507 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
2508 end = CMP(SLJIT_C_GREATER_EQUAL, STR_PTR, 0, STR_END, 0);
2509 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), 0);
2510 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, common->newline & 0xff);
2511 COND_VALUE(SLJIT_MOV, TMP1, 0, SLJIT_C_EQUAL);
2512 #ifdef COMPILE_PCRE16
2513 OP2(SLJIT_SHL, TMP1, 0, TMP1, 0, SLJIT_IMM, 1);
2514 #endif
2515 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, TMP1, 0);
2516 nl = JUMP(SLJIT_JUMP);
2517 }
2518
2519 mainloop = LABEL();
2520
2521 /* Increasing the STR_PTR here requires one less jump in the most common case. */
2522 #ifdef SUPPORT_UTF
2523 if (common->utf) readuchar = TRUE;
2524 #endif
2525 if (newlinecheck) readuchar = TRUE;
2526
2527 if (readuchar)
2528 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), 0);
2529
2530 if (newlinecheck)
2531 CMPTO(SLJIT_C_EQUAL, TMP1, 0, SLJIT_IMM, (common->newline >> 8) & 0xff, newlinelabel);
2532
2533 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
2534 #if defined SUPPORT_UTF && defined COMPILE_PCRE8
2535 if (common->utf)
2536 {
2537 singlechar = CMP(SLJIT_C_LESS, TMP1, 0, SLJIT_IMM, 0xc0);
2538 OP1(SLJIT_MOV_UB, TMP1, 0, SLJIT_MEM1(TMP1), (sljit_w)PRIV(utf8_table4) - 0xc0);
2539 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, TMP1, 0);
2540 JUMPHERE(singlechar);
2541 }
2542 #endif
2543 #if defined SUPPORT_UTF && defined COMPILE_PCRE16
2544 if (common->utf)
2545 {
2546 singlechar = CMP(SLJIT_C_LESS, TMP1, 0, SLJIT_IMM, 0xd800);
2547 OP2(SLJIT_AND, TMP1, 0, TMP1, 0, SLJIT_IMM, 0xfc00);
2548 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0xd800);
2549 COND_VALUE(SLJIT_MOV, TMP1, 0, SLJIT_C_EQUAL);
2550 OP2(SLJIT_SHL, TMP1, 0, TMP1, 0, SLJIT_IMM, 1);
2551 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, TMP1, 0);
2552 JUMPHERE(singlechar);
2553 }
2554 #endif
2555 JUMPHERE(start);
2556
2557 if (newlinecheck)
2558 {
2559 JUMPHERE(end);
2560 JUMPHERE(nl);
2561 }
2562
2563 return mainloop;
2564 }
2565
2566 #define MAX_N_CHARS 3
2567
2568 static SLJIT_INLINE BOOL fast_forward_first_n_chars(compiler_common *common, BOOL firstline)
2569 {
2570 DEFINE_COMPILER;
2571 struct sljit_label *start;
2572 struct sljit_jump *quit;
2573 pcre_int32 chars[MAX_N_CHARS * 2];
2574 pcre_uchar *cc = common->start + 1 + IMM2_SIZE;
2575 int location = 0;
2576 pcre_int32 len, c, bit, caseless;
2577 int must_stop;
2578
2579 /* We do not support alternatives now. */
2580 if (*(common->start + GET(common->start, 1)) == OP_ALT)
2581 return FALSE;
2582
2583 while (TRUE)
2584 {
2585 caseless = 0;
2586 must_stop = 1;
2587 switch(*cc)
2588 {
2589 case OP_CHAR:
2590 must_stop = 0;
2591 cc++;
2592 break;
2593
2594 case OP_CHARI:
2595 caseless = 1;
2596 must_stop = 0;
2597 cc++;
2598 break;
2599
2600 case OP_SOD:
2601 case OP_SOM:
2602 case OP_SET_SOM:
2603 case OP_NOT_WORD_BOUNDARY:
2604 case OP_WORD_BOUNDARY:
2605 case OP_EODN:
2606 case OP_EOD:
2607 case OP_CIRC:
2608 case OP_CIRCM:
2609 case OP_DOLL:
2610 case OP_DOLLM:
2611 /* Zero width assertions. */
2612 cc++;
2613 continue;
2614
2615 case OP_PLUS:
2616 case OP_MINPLUS:
2617 case OP_POSPLUS:
2618 cc++;
2619 break;
2620
2621 case OP_EXACT:
2622 cc += 1 + IMM2_SIZE;
2623 break;
2624
2625 case OP_PLUSI:
2626 case OP_MINPLUSI:
2627 case OP_POSPLUSI:
2628 caseless = 1;
2629 cc++;
2630 break;
2631
2632 case OP_EXACTI:
2633 caseless = 1;
2634 cc += 1 + IMM2_SIZE;
2635 break;
2636
2637 default:
2638 must_stop = 2;
2639 break;
2640 }
2641
2642 if (must_stop == 2)
2643 break;
2644
2645 len = 1;
2646 #ifdef SUPPORT_UTF
2647 if (common->utf && HAS_EXTRALEN(cc[0])) len += GET_EXTRALEN(cc[0]);
2648 #endif
2649
2650 if (caseless && char_has_othercase(common, cc))
2651 {
2652 caseless = char_get_othercase_bit(common, cc);
2653 if (caseless == 0)
2654 return FALSE;
2655 #ifdef COMPILE_PCRE8
2656 caseless = ((caseless & 0xff) << 8) | (len - (caseless >> 8));
2657 #else
2658 if ((caseless & 0x100) != 0)
2659 caseless = ((caseless & 0xff) << 16) | (len - (caseless >> 9));
2660 else
2661 caseless = ((caseless & 0xff) << 8) | (len - (caseless >> 9));
2662 #endif
2663 }
2664 else
2665 caseless = 0;
2666
2667 while (len > 0 && location < MAX_N_CHARS * 2)
2668 {
2669 c = *cc;
2670 bit = 0;
2671 if (len == (caseless & 0xff))
2672 {
2673 bit = caseless >> 8;
2674 c |= bit;
2675 }
2676
2677 chars[location] = c;
2678 chars[location + 1] = bit;
2679
2680 len--;
2681 location += 2;
2682 cc++;
2683 }
2684
2685 if (location >= MAX_N_CHARS * 2 || must_stop != 0)
2686 break;
2687 }
2688
2689 /* At least two characters are required. */
2690 if (location < 2 * 2)
2691 return FALSE;
2692
2693 if (firstline)
2694 {
2695 SLJIT_ASSERT(common->first_line_end != 0);
2696 OP1(SLJIT_MOV, TMP3, 0, STR_END, 0);
2697 OP2(SLJIT_SUB, STR_END, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), common->first_line_end, SLJIT_IMM, (location >> 1) - 1);
2698 }
2699 else
2700 OP2(SLJIT_SUB, STR_END, 0, STR_END, 0, SLJIT_IMM, (location >> 1) - 1);
2701
2702 start = LABEL();
2703 quit = CMP(SLJIT_C_GREATER_EQUAL, STR_PTR, 0, STR_END, 0);
2704
2705 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(0));
2706 OP1(MOV_UCHAR, TMP2, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(1));
2707 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
2708 if (chars[1] != 0)
2709 OP2(SLJIT_OR, TMP1, 0, TMP1, 0, SLJIT_IMM, chars[1]);
2710 CMPTO(SLJIT_C_NOT_EQUAL, TMP1, 0, SLJIT_IMM, chars[0], start);
2711 if (location > 2 * 2)
2712 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(1));
2713 if (chars[3] != 0)
2714 OP2(SLJIT_OR, TMP2, 0, TMP2, 0, SLJIT_IMM, chars[3]);
2715 CMPTO(SLJIT_C_NOT_EQUAL, TMP2, 0, SLJIT_IMM, chars[2], start);
2716 if (location > 2 * 2)
2717 {
2718 if (chars[5] != 0)
2719 OP2(SLJIT_OR, TMP1, 0, TMP1, 0, SLJIT_IMM, chars[5]);
2720 CMPTO(SLJIT_C_NOT_EQUAL, TMP1, 0, SLJIT_IMM, chars[4], start);
2721 }
2722 OP2(SLJIT_SUB, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
2723
2724 JUMPHERE(quit);
2725
2726 if (firstline)
2727 OP1(SLJIT_MOV, STR_END, 0, TMP3, 0);
2728 else
2729 OP2(SLJIT_ADD, STR_END, 0, STR_END, 0, SLJIT_IMM, (location >> 1) - 1);
2730 return TRUE;
2731 }
2732
2733 #undef MAX_N_CHARS
2734
2735 static SLJIT_INLINE void fast_forward_first_char(compiler_common *common, pcre_uchar first_char, BOOL caseless, BOOL firstline)
2736 {
2737 DEFINE_COMPILER;
2738 struct sljit_label *start;
2739 struct sljit_jump *quit;
2740 struct sljit_jump *found;
2741 pcre_uchar oc, bit;
2742
2743 if (firstline)
2744 {
2745 SLJIT_ASSERT(common->first_line_end != 0);
2746 OP1(SLJIT_MOV, TMP3, 0, STR_END, 0);
2747 OP1(SLJIT_MOV, STR_END, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), common->first_line_end);
2748 }
2749
2750 start = LABEL();
2751 quit = CMP(SLJIT_C_GREATER_EQUAL, STR_PTR, 0, STR_END, 0);
2752 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), 0);
2753
2754 oc = first_char;
2755 if (caseless)
2756 {
2757 oc = TABLE_GET(first_char, common->fcc, first_char);
2758 #if defined SUPPORT_UCP && !(defined COMPILE_PCRE8)
2759 if (first_char > 127 && common->utf)
2760 oc = UCD_OTHERCASE(first_char);
2761 #endif
2762 }
2763 if (first_char == oc)
2764 found = CMP(SLJIT_C_EQUAL, TMP1, 0, SLJIT_IMM, first_char);
2765 else
2766 {
2767 bit = first_char ^ oc;
2768 if (ispowerof2(bit))
2769 {
2770 OP2(SLJIT_OR, TMP2, 0, TMP1, 0, SLJIT_IMM, bit);
2771 found = CMP(SLJIT_C_EQUAL, TMP2, 0, SLJIT_IMM, first_char | bit);
2772 }
2773 else
2774 {
2775 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, first_char);
2776 COND_VALUE(SLJIT_MOV, TMP2, 0, SLJIT_C_EQUAL);
2777 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, oc);
2778 COND_VALUE(SLJIT_OR | SLJIT_SET_E, TMP2, 0, SLJIT_C_EQUAL);
2779 found = JUMP(SLJIT_C_NOT_ZERO);
2780 }
2781 }
2782
2783 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
2784 JUMPTO(SLJIT_JUMP, start);
2785 JUMPHERE(found);
2786 JUMPHERE(quit);
2787
2788 if (firstline)
2789 OP1(SLJIT_MOV, STR_END, 0, TMP3, 0);
2790 }
2791
2792 static SLJIT_INLINE void fast_forward_newline(compiler_common *common, BOOL firstline)
2793 {
2794 DEFINE_COMPILER;
2795 struct sljit_label *loop;
2796 struct sljit_jump *lastchar;
2797 struct sljit_jump *firstchar;
2798 struct sljit_jump *quit;
2799 struct sljit_jump *foundcr = NULL;
2800 struct sljit_jump *notfoundnl;
2801 jump_list *newline = NULL;
2802
2803 if (firstline)
2804 {
2805 SLJIT_ASSERT(common->first_line_end != 0);
2806 OP1(SLJIT_MOV, TMP3, 0, STR_END, 0);
2807 OP1(SLJIT_MOV, STR_END, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), common->first_line_end);
2808 }
2809
2810 if (common->nltype == NLTYPE_FIXED && common->newline > 255)
2811 {
2812 lastchar = CMP(SLJIT_C_GREATER_EQUAL, STR_PTR, 0, STR_END, 0);
2813 OP1(SLJIT_MOV, TMP1, 0, ARGUMENTS, 0);
2814 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(TMP1), SLJIT_OFFSETOF(jit_arguments, str));
2815 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(TMP1), SLJIT_OFFSETOF(jit_arguments, begin));
2816 firstchar = CMP(SLJIT_C_LESS_EQUAL, STR_PTR, 0, TMP2, 0);
2817
2818 OP2(SLJIT_ADD, TMP1, 0, TMP1, 0, SLJIT_IMM, IN_UCHARS(2));
2819 OP2(SLJIT_SUB | SLJIT_SET_U, SLJIT_UNUSED, 0, STR_PTR, 0, TMP1, 0);
2820 COND_VALUE(SLJIT_MOV, TMP2, 0, SLJIT_C_GREATER_EQUAL);
2821 #ifdef COMPILE_PCRE16
2822 OP2(SLJIT_SHL, TMP2, 0, TMP2, 0, SLJIT_IMM, 1);
2823 #endif
2824 OP2(SLJIT_SUB, STR_PTR, 0, STR_PTR, 0, TMP2, 0);
2825
2826 loop = LABEL();
2827 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
2828 quit = CMP(SLJIT_C_GREATER_EQUAL, STR_PTR, 0, STR_END, 0);
2829 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(-2));
2830 OP1(MOV_UCHAR, TMP2, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(-1));
2831 CMPTO(SLJIT_C_NOT_EQUAL, TMP1, 0, SLJIT_IMM, (common->newline >> 8) & 0xff, loop);
2832 CMPTO(SLJIT_C_NOT_EQUAL, TMP2, 0, SLJIT_IMM, common->newline & 0xff, loop);
2833
2834 JUMPHERE(quit);
2835 JUMPHERE(firstchar);
2836 JUMPHERE(lastchar);
2837
2838 if (firstline)
2839 OP1(SLJIT_MOV, STR_END, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), POSSESSIVE0);
2840 return;
2841 }
2842
2843 OP1(SLJIT_MOV, TMP1, 0, ARGUMENTS, 0);
2844 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(TMP1), SLJIT_OFFSETOF(jit_arguments, str));
2845 firstchar = CMP(SLJIT_C_LESS_EQUAL, STR_PTR, 0, TMP2, 0);
2846 skip_char_back(common);
2847
2848 loop = LABEL();
2849 read_char(common);
2850 lastchar = CMP(SLJIT_C_GREATER_EQUAL, STR_PTR, 0, STR_END, 0);
2851 if (common->nltype == NLTYPE_ANY || common->nltype == NLTYPE_ANYCRLF)
2852 foundcr = CMP(SLJIT_C_EQUAL, TMP1, 0, SLJIT_IMM, CHAR_CR);
2853 check_newlinechar(common, common->nltype, &newline, FALSE);
2854 set_jumps(newline, loop);
2855
2856 if (common->nltype == NLTYPE_ANY || common->nltype == NLTYPE_ANYCRLF)
2857 {
2858 quit = JUMP(SLJIT_JUMP);
2859 JUMPHERE(foundcr);
2860 notfoundnl = CMP(SLJIT_C_GREATER_EQUAL, STR_PTR, 0, STR_END, 0);
2861 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), 0);
2862 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, CHAR_NL);
2863 COND_VALUE(SLJIT_MOV, TMP1, 0, SLJIT_C_EQUAL);
2864 #ifdef COMPILE_PCRE16
2865 OP2(SLJIT_SHL, TMP1, 0, TMP1, 0, SLJIT_IMM, 1);
2866 #endif
2867 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, TMP1, 0);
2868 JUMPHERE(notfoundnl);
2869 JUMPHERE(quit);
2870 }
2871 JUMPHERE(lastchar);
2872 JUMPHERE(firstchar);
2873
2874 if (firstline)
2875 OP1(SLJIT_MOV, STR_END, 0, TMP3, 0);
2876 }
2877
2878 static SLJIT_INLINE void fast_forward_start_bits(compiler_common *common, sljit_uw start_bits, BOOL firstline)
2879 {
2880 DEFINE_COMPILER;
2881 struct sljit_label *start;
2882 struct sljit_jump *quit;
2883 struct sljit_jump *found;
2884 #ifndef COMPILE_PCRE8
2885 struct sljit_jump *jump;
2886 #endif
2887
2888 if (firstline)
2889 {
2890 SLJIT_ASSERT(common->first_line_end != 0);
2891 OP1(SLJIT_MOV, RETURN_ADDR, 0, STR_END, 0);
2892 OP1(SLJIT_MOV, STR_END, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), common->first_line_end);
2893 }
2894
2895 start = LABEL();
2896 quit = CMP(SLJIT_C_GREATER_EQUAL, STR_PTR, 0, STR_END, 0);
2897 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), 0);
2898 #ifdef SUPPORT_UTF
2899 if (common->utf)
2900 OP1(SLJIT_MOV, TMP3, 0, TMP1, 0);
2901 #endif
2902 #ifndef COMPILE_PCRE8
2903 jump = CMP(SLJIT_C_LESS, TMP1, 0, SLJIT_IMM, 255);
2904 OP1(SLJIT_MOV, TMP1, 0, SLJIT_IMM, 255);
2905 JUMPHERE(jump);
2906 #endif
2907 OP2(SLJIT_AND, TMP2, 0, TMP1, 0, SLJIT_IMM, 0x7);
2908 OP2(SLJIT_LSHR, TMP1, 0, TMP1, 0, SLJIT_IMM, 3);
2909 OP1(SLJIT_MOV_UB, TMP1, 0, SLJIT_MEM1(TMP1), start_bits);
2910 OP2(SLJIT_SHL, TMP2, 0, SLJIT_IMM, 1, TMP2, 0);
2911 OP2(SLJIT_AND | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, TMP2, 0);
2912 found = JUMP(SLJIT_C_NOT_ZERO);
2913
2914 #ifdef SUPPORT_UTF
2915 if (common->utf)
2916 OP1(SLJIT_MOV, TMP1, 0, TMP3, 0);
2917 #endif
2918 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
2919 #if defined SUPPORT_UTF && defined COMPILE_PCRE8
2920 if (common->utf)
2921 {
2922 CMPTO(SLJIT_C_LESS, TMP1, 0, SLJIT_IMM, 0xc0, start);
2923 OP1(SLJIT_MOV_UB, TMP1, 0, SLJIT_MEM1(TMP1), (sljit_w)PRIV(utf8_table4) - 0xc0);
2924 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, TMP1, 0);
2925 }
2926 #endif
2927 #if defined SUPPORT_UTF && defined COMPILE_PCRE16
2928 if (common->utf)
2929 {
2930 CMPTO(SLJIT_C_LESS, TMP1, 0, SLJIT_IMM, 0xd800, start);
2931 OP2(SLJIT_AND, TMP1, 0, TMP1, 0, SLJIT_IMM, 0xfc00);
2932 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0xd800);
2933 COND_VALUE(SLJIT_MOV, TMP1, 0, SLJIT_C_EQUAL);
2934 OP2(SLJIT_SHL, TMP1, 0, TMP1, 0, SLJIT_IMM, 1);
2935 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, TMP1, 0);
2936 }
2937 #endif
2938 JUMPTO(SLJIT_JUMP, start);
2939 JUMPHERE(found);
2940 JUMPHERE(quit);
2941
2942 if (firstline)
2943 OP1(SLJIT_MOV, STR_END, 0, RETURN_ADDR, 0);
2944 }
2945
2946 static SLJIT_INLINE struct sljit_jump *search_requested_char(compiler_common *common, pcre_uchar req_char, BOOL caseless, BOOL has_firstchar)
2947 {
2948 DEFINE_COMPILER;
2949 struct sljit_label *loop;
2950 struct sljit_jump *toolong;
2951 struct sljit_jump *alreadyfound;
2952 struct sljit_jump *found;
2953 struct sljit_jump *foundoc = NULL;
2954 struct sljit_jump *notfound;
2955 pcre_uchar oc, bit;
2956
2957 SLJIT_ASSERT(common->req_char_ptr != 0);
2958 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), common->req_char_ptr);
2959 OP2(SLJIT_ADD, TMP1, 0, STR_PTR, 0, SLJIT_IMM, REQ_BYTE_MAX);
2960 toolong = CMP(SLJIT_C_LESS, TMP1, 0, STR_END, 0);
2961 alreadyfound = CMP(SLJIT_C_LESS, STR_PTR, 0, TMP2, 0);
2962
2963 if (has_firstchar)
2964 OP2(SLJIT_ADD, TMP1, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
2965 else
2966 OP1(SLJIT_MOV, TMP1, 0, STR_PTR, 0);
2967
2968 loop = LABEL();
2969 notfound = CMP(SLJIT_C_GREATER_EQUAL, TMP1, 0, STR_END, 0);
2970
2971 OP1(MOV_UCHAR, TMP2, 0, SLJIT_MEM1(TMP1), 0);
2972 oc = req_char;
2973 if (caseless)
2974 {
2975 oc = TABLE_GET(req_char, common->fcc, req_char);
2976 #if defined SUPPORT_UCP && !(defined COMPILE_PCRE8)
2977 if (req_char > 127 && common->utf)
2978 oc = UCD_OTHERCASE(req_char);
2979 #endif
2980 }
2981 if (req_char == oc)
2982 found = CMP(SLJIT_C_EQUAL, TMP2, 0, SLJIT_IMM, req_char);
2983 else
2984 {
2985 bit = req_char ^ oc;
2986 if (ispowerof2(bit))
2987 {
2988 OP2(SLJIT_OR, TMP2, 0, TMP2, 0, SLJIT_IMM, bit);
2989 found = CMP(SLJIT_C_EQUAL, TMP2, 0, SLJIT_IMM, req_char | bit);
2990 }
2991 else
2992 {
2993 found = CMP(SLJIT_C_EQUAL, TMP2, 0, SLJIT_IMM, req_char);
2994 foundoc = CMP(SLJIT_C_EQUAL, TMP2, 0, SLJIT_IMM, oc);
2995 }
2996 }
2997 OP2(SLJIT_ADD, TMP1, 0, TMP1, 0, SLJIT_IMM, IN_UCHARS(1));
2998 JUMPTO(SLJIT_JUMP, loop);
2999
3000 JUMPHERE(found);
3001 if (foundoc)
3002 JUMPHERE(foundoc);
3003 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), common->req_char_ptr, TMP1, 0);
3004 JUMPHERE(alreadyfound);
3005 JUMPHERE(toolong);
3006 return notfound;
3007 }
3008
3009 static void do_revertframes(compiler_common *common)
3010 {
3011 DEFINE_COMPILER;
3012 struct sljit_jump *jump;
3013 struct sljit_label *mainloop;
3014
3015 sljit_emit_fast_enter(compiler, RETURN_ADDR, 0);
3016 OP1(SLJIT_MOV, TMP1, 0, STACK_TOP, 0);
3017 GET_LOCAL_BASE(TMP3, 0, 0);
3018
3019 /* Drop frames until we reach STACK_TOP. */
3020 mainloop = LABEL();
3021 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(TMP1), 0);
3022 jump = CMP(SLJIT_C_SIG_LESS_EQUAL, TMP2, 0, SLJIT_IMM, frame_end);
3023 OP2(SLJIT_ADD, TMP2, 0, TMP2, 0, TMP3, 0);
3024 OP1(SLJIT_MOV, SLJIT_MEM1(TMP2), 0, SLJIT_MEM1(TMP1), sizeof(sljit_w));
3025 OP1(SLJIT_MOV, SLJIT_MEM1(TMP2), sizeof(sljit_w), SLJIT_MEM1(TMP1), 2 * sizeof(sljit_w));
3026 OP2(SLJIT_ADD, TMP1, 0, TMP1, 0, SLJIT_IMM, 3 * sizeof(sljit_w));
3027 JUMPTO(SLJIT_JUMP, mainloop);
3028
3029 JUMPHERE(jump);
3030 jump = CMP(SLJIT_C_NOT_EQUAL, TMP2, 0, SLJIT_IMM, frame_end);
3031 /* End of dropping frames. */
3032 sljit_emit_fast_return(compiler, RETURN_ADDR, 0);
3033
3034 JUMPHERE(jump);
3035 jump = CMP(SLJIT_C_NOT_EQUAL, TMP2, 0, SLJIT_IMM, frame_setstrbegin);
3036 /* Set string begin. */
3037 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(TMP1), sizeof(sljit_w));
3038 OP2(SLJIT_ADD, TMP1, 0, TMP1, 0, SLJIT_IMM, 2 * sizeof(sljit_w));
3039 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(0), TMP2, 0);
3040 JUMPTO(SLJIT_JUMP, mainloop);
3041
3042 JUMPHERE(jump);
3043 if (common->mark_ptr != 0)
3044 {
3045 jump = CMP(SLJIT_C_NOT_EQUAL, TMP2, 0, SLJIT_IMM, frame_setmark);
3046 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(TMP1), sizeof(sljit_w));
3047 OP2(SLJIT_ADD, TMP1, 0, TMP1, 0, SLJIT_IMM, 2 * sizeof(sljit_w));
3048 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), common->mark_ptr, TMP2, 0);
3049 JUMPTO(SLJIT_JUMP, mainloop);
3050
3051 JUMPHERE(jump);
3052 }
3053
3054 /* Unknown command. */
3055 OP2(SLJIT_ADD, TMP1, 0, TMP1, 0, SLJIT_IMM, 2 * sizeof(sljit_w));
3056 JUMPTO(SLJIT_JUMP, mainloop);
3057 }
3058
3059 static void check_wordboundary(compiler_common *common)
3060 {
3061 DEFINE_COMPILER;
3062 struct sljit_jump *skipread;
3063 #if !(defined COMPILE_PCRE8) || defined SUPPORT_UTF
3064 struct sljit_jump *jump;
3065 #endif
3066
3067 SLJIT_COMPILE_ASSERT(ctype_word == 0x10, ctype_word_must_be_16);
3068
3069 sljit_emit_fast_enter(compiler, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS0);
3070 /* Get type of the previous char, and put it to LOCALS1. */
3071 OP1(SLJIT_MOV, TMP1, 0, ARGUMENTS, 0);
3072 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(TMP1), SLJIT_OFFSETOF(jit_arguments, begin));
3073 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS1, SLJIT_IMM, 0);
3074 skipread = CMP(SLJIT_C_LESS_EQUAL, STR_PTR, 0, TMP1, 0);
3075 skip_char_back(common);
3076 check_start_used_ptr(common);
3077 read_char(common);
3078
3079 /* Testing char type. */
3080 #ifdef SUPPORT_UCP
3081 if (common->use_ucp)
3082 {
3083 OP1(SLJIT_MOV, TMP2, 0, SLJIT_IMM, 1);
3084 jump = CMP(SLJIT_C_EQUAL, TMP1, 0, SLJIT_IMM, CHAR_UNDERSCORE);
3085 add_jump(compiler, &common->getucd, JUMP(SLJIT_FAST_CALL));
3086 OP2(SLJIT_SUB, TMP1, 0, TMP1, 0, SLJIT_IMM, ucp_Ll);
3087 OP2(SLJIT_SUB | SLJIT_SET_U, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, ucp_Lu - ucp_Ll);
3088 COND_VALUE(SLJIT_MOV, TMP2, 0, SLJIT_C_LESS_EQUAL);
3089 OP2(SLJIT_SUB, TMP1, 0, TMP1, 0, SLJIT_IMM, ucp_Nd - ucp_Ll);
3090 OP2(SLJIT_SUB | SLJIT_SET_U, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, ucp_No - ucp_Nd);
3091 COND_VALUE(SLJIT_OR, TMP2, 0, SLJIT_C_LESS_EQUAL);
3092 JUMPHERE(jump);
3093 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS1, TMP2, 0);
3094 }
3095 else
3096 #endif
3097 {
3098 #ifndef COMPILE_PCRE8
3099 jump = CMP(SLJIT_C_GREATER, TMP1, 0, SLJIT_IMM, 255);
3100 #elif defined SUPPORT_UTF
3101 /* Here LOCALS1 has already been zeroed. */
3102 jump = NULL;
3103 if (common->utf)
3104 jump = CMP(SLJIT_C_GREATER, TMP1, 0, SLJIT_IMM, 255);
3105 #endif /* COMPILE_PCRE8 */
3106 OP1(SLJIT_MOV_UB, TMP1, 0, SLJIT_MEM1(TMP1), common->ctypes);
3107 OP2(SLJIT_LSHR, TMP1, 0, TMP1, 0, SLJIT_IMM, 4 /* ctype_word */);
3108 OP2(SLJIT_AND, TMP1, 0, TMP1, 0, SLJIT_IMM, 1);
3109 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS1, TMP1, 0);
3110 #ifndef COMPILE_PCRE8
3111 JUMPHERE(jump);
3112 #elif defined SUPPORT_UTF
3113 if (jump != NULL)
3114 JUMPHERE(jump);
3115 #endif /* COMPILE_PCRE8 */
3116 }
3117 JUMPHERE(skipread);
3118
3119 OP1(SLJIT_MOV, TMP2, 0, SLJIT_IMM, 0);
3120 skipread = check_str_end(common);
3121 peek_char(common);
3122
3123 /* Testing char type. This is a code duplication. */
3124 #ifdef SUPPORT_UCP
3125 if (common->use_ucp)
3126 {
3127 OP1(SLJIT_MOV, TMP2, 0, SLJIT_IMM, 1);
3128 jump = CMP(SLJIT_C_EQUAL, TMP1, 0, SLJIT_IMM, CHAR_UNDERSCORE);
3129 add_jump(compiler, &common->getucd, JUMP(SLJIT_FAST_CALL));
3130 OP2(SLJIT_SUB, TMP1, 0, TMP1, 0, SLJIT_IMM, ucp_Ll);
3131 OP2(SLJIT_SUB | SLJIT_SET_U, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, ucp_Lu - ucp_Ll);
3132 COND_VALUE(SLJIT_MOV, TMP2, 0, SLJIT_C_LESS_EQUAL);
3133 OP2(SLJIT_SUB, TMP1, 0, TMP1, 0, SLJIT_IMM, ucp_Nd - ucp_Ll);
3134 OP2(SLJIT_SUB | SLJIT_SET_U, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, ucp_No - ucp_Nd);
3135 COND_VALUE(SLJIT_OR, TMP2, 0, SLJIT_C_LESS_EQUAL);
3136 JUMPHERE(jump);
3137 }
3138 else
3139 #endif
3140 {
3141 #ifndef COMPILE_PCRE8
3142 /* TMP2 may be destroyed by peek_char. */
3143 OP1(SLJIT_MOV, TMP2, 0, SLJIT_IMM, 0);
3144 jump = CMP(SLJIT_C_GREATER, TMP1, 0, SLJIT_IMM, 255);
3145 #elif defined SUPPORT_UTF
3146 OP1(SLJIT_MOV, TMP2, 0, SLJIT_IMM, 0);
3147 jump = NULL;
3148 if (common->utf)
3149 jump = CMP(SLJIT_C_GREATER, TMP1, 0, SLJIT_IMM, 255);
3150 #endif
3151 OP1(SLJIT_MOV_UB, TMP2, 0, SLJIT_MEM1(TMP1), common->ctypes);
3152 OP2(SLJIT_LSHR, TMP2, 0, TMP2, 0, SLJIT_IMM, 4 /* ctype_word */);
3153 OP2(SLJIT_AND, TMP2, 0, TMP2, 0, SLJIT_IMM, 1);
3154 #ifndef COMPILE_PCRE8
3155 JUMPHERE(jump);
3156 #elif defined SUPPORT_UTF
3157 if (jump != NULL)
3158 JUMPHERE(jump);
3159 #endif /* COMPILE_PCRE8 */
3160 }
3161 JUMPHERE(skipread);
3162
3163 OP2(SLJIT_XOR | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP2, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS1);
3164 sljit_emit_fast_return(compiler, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS0);
3165 }
3166
3167 /*
3168 range format:
3169
3170 ranges[0] = length of the range (max MAX_RANGE_SIZE, -1 means invalid range).
3171 ranges[1] = first bit (0 or 1)
3172 ranges[2-length] = position of the bit change (when the current bit is not equal to the previous)
3173 */
3174
3175 static BOOL check_ranges(compiler_common *common, int *ranges, jump_list **backtracks, BOOL readch)
3176 {
3177 DEFINE_COMPILER;
3178 struct sljit_jump *jump;
3179
3180 if (ranges[0] < 0)
3181 return FALSE;
3182
3183 switch(ranges[0])
3184 {
3185 case 1:
3186 if (readch)
3187 read_char(common);
3188 add_jump(compiler, backtracks, CMP(ranges[1] == 0 ? SLJIT_C_LESS : SLJIT_C_GREATER_EQUAL, TMP1, 0, SLJIT_IMM, ranges[2]));
3189 return TRUE;
3190
3191 case 2:
3192 if (readch)
3193 read_char(common);
3194 OP2(SLJIT_SUB, TMP1, 0, TMP1, 0, SLJIT_IMM, ranges[2]);
3195 add_jump(compiler, backtracks, CMP(ranges[1] != 0 ? SLJIT_C_LESS : SLJIT_C_GREATER_EQUAL, TMP1, 0, SLJIT_IMM, ranges[3] - ranges[2]));
3196 return TRUE;
3197
3198 case 4:
3199 if (ranges[2] + 1 == ranges[3] && ranges[4] + 1 == ranges[5])
3200 {
3201 if (readch)
3202 read_char(common);
3203 if (ranges[1] != 0)
3204 {
3205 add_jump(compiler, backtracks, CMP(SLJIT_C_EQUAL, TMP1, 0, SLJIT_IMM, ranges[2]));
3206 add_jump(compiler, backtracks, CMP(SLJIT_C_EQUAL, TMP1, 0, SLJIT_IMM, ranges[4]));
3207 }
3208 else
3209 {
3210 jump = CMP(SLJIT_C_EQUAL, TMP1, 0, SLJIT_IMM, ranges[2]);
3211 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, TMP1, 0, SLJIT_IMM, ranges[4]));
3212 JUMPHERE(jump);
3213 }
3214 return TRUE;
3215 }
3216 if ((ranges[3] - ranges[2]) == (ranges[5] - ranges[4]) && ispowerof2(ranges[4] - ranges[2]))
3217 {
3218 if (readch)
3219 read_char(common);
3220 OP2(SLJIT_OR, TMP1, 0, TMP1, 0, SLJIT_IMM, ranges[4] - ranges[2]);
3221 OP2(SLJIT_SUB, TMP1, 0, TMP1, 0, SLJIT_IMM, ranges[4]);
3222 add_jump(compiler, backtracks, CMP(ranges[1] != 0 ? SLJIT_C_LESS : SLJIT_C_GREATER_EQUAL, TMP1, 0, SLJIT_IMM, ranges[5] - ranges[4]));
3223 return TRUE;
3224 }
3225 return FALSE;
3226
3227 default:
3228 return FALSE;
3229 }
3230 }
3231
3232 static void get_ctype_ranges(compiler_common *common, int flag, int *ranges)
3233 {
3234 int i, bit, length;
3235 const pcre_uint8 *ctypes = (const pcre_uint8*)common->ctypes;
3236
3237 bit = ctypes[0] & flag;
3238 ranges[0] = -1;
3239 ranges[1] = bit != 0 ? 1 : 0;
3240 length = 0;
3241
3242 for (i = 1; i < 256; i++)
3243 if ((ctypes[i] & flag) != bit)
3244 {
3245 if (length >= MAX_RANGE_SIZE)
3246 return;
3247 ranges[2 + length] = i;
3248 length++;
3249 bit ^= flag;
3250 }
3251
3252 if (bit != 0)
3253 {
3254 if (length >= MAX_RANGE_SIZE)
3255 return;
3256 ranges[2 + length] = 256;
3257 length++;
3258 }
3259 ranges[0] = length;
3260 }
3261
3262 static BOOL check_class_ranges(compiler_common *common, const pcre_uint8 *bits, BOOL nclass, jump_list **backtracks)
3263 {
3264 int ranges[2 + MAX_RANGE_SIZE];
3265 pcre_uint8 bit, cbit, all;
3266 int i, byte, length = 0;
3267
3268 bit = bits[0] & 0x1;
3269 ranges[1] = bit;
3270 /* Can be 0 or 255. */
3271 all = -bit;
3272
3273 for (i = 0; i < 256; )
3274 {
3275 byte = i >> 3;
3276 if ((i & 0x7) == 0 && bits[byte] == all)
3277 i += 8;
3278 else
3279 {
3280 cbit = (bits[byte] >> (i & 0x7)) & 0x1;
3281 if (cbit != bit)
3282 {
3283 if (length >= MAX_RANGE_SIZE)
3284 return FALSE;
3285 ranges[2 + length] = i;
3286 length++;
3287 bit = cbit;
3288 all = -cbit;
3289 }
3290 i++;
3291 }
3292 }
3293
3294 if (((bit == 0) && nclass) || ((bit == 1) && !nclass))
3295 {
3296 if (length >= MAX_RANGE_SIZE)
3297 return FALSE;
3298 ranges[2 + length] = 256;
3299 length++;
3300 }
3301 ranges[0] = length;
3302
3303 return check_ranges(common, ranges, backtracks, FALSE);
3304 }
3305
3306 static void check_anynewline(compiler_common *common)
3307 {
3308 /* Check whether TMP1 contains a newline character. TMP2 destroyed. */
3309 DEFINE_COMPILER;
3310
3311 sljit_emit_fast_enter(compiler, RETURN_ADDR, 0);
3312
3313 OP2(SLJIT_SUB, TMP1, 0, TMP1, 0, SLJIT_IMM, 0x0a);
3314 OP2(SLJIT_SUB | SLJIT_SET_U, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0x0d - 0x0a);
3315 COND_VALUE(SLJIT_MOV, TMP2, 0, SLJIT_C_LESS_EQUAL);
3316 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0x85 - 0x0a);
3317 #if defined SUPPORT_UTF || defined COMPILE_PCRE16
3318 #ifdef COMPILE_PCRE8
3319 if (common->utf)
3320 {
3321 #endif
3322 COND_VALUE(SLJIT_OR, TMP2, 0, SLJIT_C_EQUAL);
3323 OP2(SLJIT_OR, TMP1, 0, TMP1, 0, SLJIT_IMM, 0x1);
3324 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0x2029 - 0x0a);
3325 #ifdef COMPILE_PCRE8
3326 }
3327 #endif
3328 #endif /* SUPPORT_UTF || COMPILE_PCRE16 */
3329 COND_VALUE(SLJIT_OR | SLJIT_SET_E, TMP2, 0, SLJIT_C_EQUAL);
3330 sljit_emit_fast_return(compiler, RETURN_ADDR, 0);
3331 }
3332
3333 static void check_hspace(compiler_common *common)
3334 {
3335 /* Check whether TMP1 contains a newline character. TMP2 destroyed. */
3336 DEFINE_COMPILER;
3337
3338 sljit_emit_fast_enter(compiler, RETURN_ADDR, 0);
3339
3340 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0x09);
3341 COND_VALUE(SLJIT_MOV, TMP2, 0, SLJIT_C_EQUAL);
3342 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0x20);
3343 COND_VALUE(SLJIT_OR, TMP2, 0, SLJIT_C_EQUAL);
3344 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0xa0);
3345 #if defined SUPPORT_UTF || defined COMPILE_PCRE16
3346 #ifdef COMPILE_PCRE8
3347 if (common->utf)
3348 {
3349 #endif
3350 COND_VALUE(SLJIT_OR, TMP2, 0, SLJIT_C_EQUAL);
3351 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0x1680);
3352 COND_VALUE(SLJIT_OR, TMP2, 0, SLJIT_C_EQUAL);
3353 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0x180e);
3354 COND_VALUE(SLJIT_OR, TMP2, 0, SLJIT_C_EQUAL);
3355 OP2(SLJIT_SUB, TMP1, 0, TMP1, 0, SLJIT_IMM, 0x2000);
3356 OP2(SLJIT_SUB | SLJIT_SET_U, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0x200A - 0x2000);
3357 COND_VALUE(SLJIT_OR, TMP2, 0, SLJIT_C_LESS_EQUAL);
3358 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0x202f - 0x2000);
3359 COND_VALUE(SLJIT_OR, TMP2, 0, SLJIT_C_EQUAL);
3360 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0x205f - 0x2000);
3361 COND_VALUE(SLJIT_OR, TMP2, 0, SLJIT_C_EQUAL);
3362 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0x3000 - 0x2000);
3363 #ifdef COMPILE_PCRE8
3364 }
3365 #endif
3366 #endif /* SUPPORT_UTF || COMPILE_PCRE16 */
3367 COND_VALUE(SLJIT_OR | SLJIT_SET_E, TMP2, 0, SLJIT_C_EQUAL);
3368
3369 sljit_emit_fast_return(compiler, RETURN_ADDR, 0);
3370 }
3371
3372 static void check_vspace(compiler_common *common)
3373 {
3374 /* Check whether TMP1 contains a newline character. TMP2 destroyed. */
3375 DEFINE_COMPILER;
3376
3377 sljit_emit_fast_enter(compiler, RETURN_ADDR, 0);
3378
3379 OP2(SLJIT_SUB, TMP1, 0, TMP1, 0, SLJIT_IMM, 0x0a);
3380 OP2(SLJIT_SUB | SLJIT_SET_U, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0x0d - 0x0a);
3381 COND_VALUE(SLJIT_MOV, TMP2, 0, SLJIT_C_LESS_EQUAL);
3382 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0x85 - 0x0a);
3383 #if defined SUPPORT_UTF || defined COMPILE_PCRE16
3384 #ifdef COMPILE_PCRE8
3385 if (common->utf)
3386 {
3387 #endif
3388 COND_VALUE(SLJIT_OR | SLJIT_SET_E, TMP2, 0, SLJIT_C_EQUAL);
3389 OP2(SLJIT_OR, TMP1, 0, TMP1, 0, SLJIT_IMM, 0x1);
3390 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0x2029 - 0x0a);
3391 #ifdef COMPILE_PCRE8
3392 }
3393 #endif
3394 #endif /* SUPPORT_UTF || COMPILE_PCRE16 */
3395 COND_VALUE(SLJIT_OR | SLJIT_SET_E, TMP2, 0, SLJIT_C_EQUAL);
3396
3397 sljit_emit_fast_return(compiler, RETURN_ADDR, 0);
3398 }
3399
3400 #define CHAR1 STR_END
3401 #define CHAR2 STACK_TOP
3402
3403 static void do_casefulcmp(compiler_common *common)
3404 {
3405 DEFINE_COMPILER;
3406 struct sljit_jump *jump;
3407 struct sljit_label *label;
3408
3409 sljit_emit_fast_enter(compiler, RETURN_ADDR, 0);
3410 OP2(SLJIT_SUB, STR_PTR, 0, STR_PTR, 0, TMP2, 0);
3411 OP1(SLJIT_MOV, TMP3, 0, CHAR1, 0);
3412 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS0, CHAR2, 0);
3413 OP2(SLJIT_SUB, TMP1, 0, TMP1, 0, SLJIT_IMM, IN_UCHARS(1));
3414 OP2(SLJIT_SUB, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
3415
3416 label = LABEL();
3417 OP1(MOVU_UCHAR, CHAR1, 0, SLJIT_MEM1(TMP1), IN_UCHARS(1));
3418 OP1(MOVU_UCHAR, CHAR2, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(1));
3419 jump = CMP(SLJIT_C_NOT_EQUAL, CHAR1, 0, CHAR2, 0);
3420 OP2(SLJIT_SUB | SLJIT_SET_E, TMP2, 0, TMP2, 0, SLJIT_IMM, IN_UCHARS(1));
3421 JUMPTO(SLJIT_C_NOT_ZERO, label);
3422
3423 JUMPHERE(jump);
3424 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
3425 OP1(SLJIT_MOV, CHAR1, 0, TMP3, 0);
3426 OP1(SLJIT_MOV, CHAR2, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS0);
3427 sljit_emit_fast_return(compiler, RETURN_ADDR, 0);
3428 }
3429
3430 #define LCC_TABLE STACK_LIMIT
3431
3432 static void do_caselesscmp(compiler_common *common)
3433 {
3434 DEFINE_COMPILER;
3435 struct sljit_jump *jump;
3436 struct sljit_label *label;
3437
3438 sljit_emit_fast_enter(compiler, RETURN_ADDR, 0);
3439 OP2(SLJIT_SUB, STR_PTR, 0, STR_PTR, 0, TMP2, 0);
3440
3441 OP1(SLJIT_MOV, TMP3, 0, LCC_TABLE, 0);
3442 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS0, CHAR1, 0);
3443 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS1, CHAR2, 0);
3444 OP1(SLJIT_MOV, LCC_TABLE, 0, SLJIT_IMM, common->lcc);
3445 OP2(SLJIT_SUB, TMP1, 0, TMP1, 0, SLJIT_IMM, IN_UCHARS(1));
3446 OP2(SLJIT_SUB, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
3447
3448 label = LABEL();
3449 OP1(MOVU_UCHAR, CHAR1, 0, SLJIT_MEM1(TMP1), IN_UCHARS(1));
3450 OP1(MOVU_UCHAR, CHAR2, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(1));
3451 #ifndef COMPILE_PCRE8
3452 jump = CMP(SLJIT_C_GREATER, CHAR1, 0, SLJIT_IMM, 255);
3453 #endif
3454 OP1(SLJIT_MOV_UB, CHAR1, 0, SLJIT_MEM2(LCC_TABLE, CHAR1), 0);
3455 #ifndef COMPILE_PCRE8
3456 JUMPHERE(jump);
3457 jump = CMP(SLJIT_C_GREATER, CHAR2, 0, SLJIT_IMM, 255);
3458 #endif
3459 OP1(SLJIT_MOV_UB, CHAR2, 0, SLJIT_MEM2(LCC_TABLE, CHAR2), 0);
3460 #ifndef COMPILE_PCRE8
3461 JUMPHERE(jump);
3462 #endif
3463 jump = CMP(SLJIT_C_NOT_EQUAL, CHAR1, 0, CHAR2, 0);
3464 OP2(SLJIT_SUB | SLJIT_SET_E, TMP2, 0, TMP2, 0, SLJIT_IMM, IN_UCHARS(1));
3465 JUMPTO(SLJIT_C_NOT_ZERO, label);
3466
3467 JUMPHERE(jump);
3468 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
3469 OP1(SLJIT_MOV, LCC_TABLE, 0, TMP3, 0);
3470 OP1(SLJIT_MOV, CHAR1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS0);
3471 OP1(SLJIT_MOV, CHAR2, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS1);
3472 sljit_emit_fast_return(compiler, RETURN_ADDR, 0);
3473 }
3474
3475 #undef LCC_TABLE
3476 #undef CHAR1
3477 #undef CHAR2
3478
3479 #if defined SUPPORT_UTF && defined SUPPORT_UCP
3480
3481 static const pcre_uchar *SLJIT_CALL do_utf_caselesscmp(pcre_uchar *src1, jit_arguments *args, pcre_uchar *end1)
3482 {
3483 /* This function would be ineffective to do in JIT level. */
3484 pcre_uint32 c1, c2;
3485 const pcre_uchar *src2 = args->uchar_ptr;
3486 const pcre_uchar *end2 = args->end;
3487 const ucd_record *ur;
3488 const pcre_uint32 *pp;
3489
3490 while (src1 < end1)
3491 {
3492 if (src2 >= end2)
3493 return (pcre_uchar*)1;
3494 GETCHARINC(c1, src1);
3495 GETCHARINC(c2, src2);
3496 ur = GET_UCD(c2);
3497 if (c1 != c2 && c1 != c2 + ur->other_case)
3498 {
3499 pp = PRIV(ucd_caseless_sets) + ur->caseset;
3500 for (;;)
3501 {
3502 if (c1 < *pp) return NULL;
3503 if (c1 == *pp++) break;
3504 }
3505 }
3506 }
3507 return src2;
3508 }
3509
3510 #endif /* SUPPORT_UTF && SUPPORT_UCP */
3511
3512 static pcre_uchar *byte_sequence_compare(compiler_common *common, BOOL caseless, pcre_uchar *cc,
3513 compare_context* context, jump_list **backtracks)
3514 {
3515 DEFINE_COMPILER;
3516 unsigned int othercasebit = 0;
3517 pcre_uchar *othercasechar = NULL;
3518 #ifdef SUPPORT_UTF
3519 int utflength;
3520 #endif
3521
3522 if (caseless && char_has_othercase(common, cc))
3523 {
3524 othercasebit = char_get_othercase_bit(common, cc);
3525 SLJIT_ASSERT(othercasebit);
3526 /* Extracting bit difference info. */
3527 #ifdef COMPILE_PCRE8
3528 othercasechar = cc + (othercasebit >> 8);
3529 othercasebit &= 0xff;
3530 #else
3531 #ifdef COMPILE_PCRE16
3532 othercasechar = cc + (othercasebit >> 9);
3533 if ((othercasebit & 0x100) != 0)
3534 othercasebit = (othercasebit & 0xff) << 8;
3535 else
3536 othercasebit &= 0xff;
3537 #endif
3538 #endif
3539 }
3540
3541 if (context->sourcereg == -1)
3542 {
3543 #ifdef COMPILE_PCRE8
3544 #if defined SLJIT_UNALIGNED && SLJIT_UNALIGNED
3545 if (context->length >= 4)
3546 OP1(SLJIT_MOV_SI, TMP1, 0, SLJIT_MEM1(STR_PTR), -context->length);
3547 else if (context->length >= 2)
3548 OP1(SLJIT_MOV_UH, TMP1, 0, SLJIT_MEM1(STR_PTR), -context->length);
3549 else
3550 #endif
3551 OP1(SLJIT_MOV_UB, TMP1, 0, SLJIT_MEM1(STR_PTR), -context->length);
3552 #else
3553 #ifdef COMPILE_PCRE16
3554 #if defined SLJIT_UNALIGNED && SLJIT_UNALIGNED
3555 if (context->length >= 4)
3556 OP1(SLJIT_MOV_SI, TMP1, 0, SLJIT_MEM1(STR_PTR), -context->length);
3557 else
3558 #endif
3559 OP1(SLJIT_MOV_UH, TMP1, 0, SLJIT_MEM1(STR_PTR), -context->length);
3560 #endif
3561 #endif /* COMPILE_PCRE8 */
3562 context->sourcereg = TMP2;
3563 }
3564
3565 #ifdef SUPPORT_UTF
3566 utflength = 1;
3567 if (common->utf && HAS_EXTRALEN(*cc))
3568 utflength += GET_EXTRALEN(*cc);
3569
3570 do
3571 {
3572 #endif
3573
3574 context->length -= IN_UCHARS(1);
3575 #if defined SLJIT_UNALIGNED && SLJIT_UNALIGNED
3576
3577 /* Unaligned read is supported. */
3578 if (othercasebit != 0 && othercasechar == cc)
3579 {
3580 context->c.asuchars[context->ucharptr] = *cc | othercasebit;
3581 context->oc.asuchars[context->ucharptr] = othercasebit;
3582 }
3583 else
3584 {
3585 context->c.asuchars[context->ucharptr] = *cc;
3586 context->oc.asuchars[context->ucharptr] = 0;
3587 }
3588 context->ucharptr++;
3589
3590 #ifdef COMPILE_PCRE8
3591 if (context->ucharptr >= 4 || context->length == 0 || (context->ucharptr == 2 && context->length == 1))
3592 #else
3593 if (context->ucharptr >= 2 || context->length == 0)
3594 #endif
3595 {
3596 if (context->length >= 4)
3597 OP1(SLJIT_MOV_SI, context->sourcereg, 0, SLJIT_MEM1(STR_PTR), -context->length);
3598 #ifdef COMPILE_PCRE8
3599 else if (context->length >= 2)
3600 OP1(SLJIT_MOV_UH, context->sourcereg, 0, SLJIT_MEM1(STR_PTR), -context->length);
3601 else if (context->length >= 1)
3602 OP1(SLJIT_MOV_UB, context->sourcereg, 0, SLJIT_MEM1(STR_PTR), -context->length);
3603 #else
3604 else if (context->length >= 2)
3605 OP1(SLJIT_MOV_UH, context->sourcereg, 0, SLJIT_MEM1(STR_PTR), -context->length);
3606 #endif
3607 context->sourcereg = context->sourcereg == TMP1 ? TMP2 : TMP1;
3608
3609 switch(context->ucharptr)
3610 {
3611 case 4 / sizeof(pcre_uchar):
3612 if (context->oc.asint != 0)
3613 OP2(SLJIT_OR, context->sourcereg, 0, context->sourcereg, 0, SLJIT_IMM, context->oc.asint);
3614 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, context->sourcereg, 0, SLJIT_IMM, context->c.asint | context->oc.asint));
3615 break;
3616
3617 case 2 / sizeof(pcre_uchar):
3618 if (context->oc.asushort != 0)
3619 OP2(SLJIT_OR, context->sourcereg, 0, context->sourcereg, 0, SLJIT_IMM, context->oc.asushort);
3620 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, context->sourcereg, 0, SLJIT_IMM, context->c.asushort | context->oc.asushort));
3621 break;
3622
3623 #ifdef COMPILE_PCRE8
3624 case 1:
3625 if (context->oc.asbyte != 0)
3626 OP2(SLJIT_OR, context->sourcereg, 0, context->sourcereg, 0, SLJIT_IMM, context->oc.asbyte);
3627 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, context->sourcereg, 0, SLJIT_IMM, context->c.asbyte | context->oc.asbyte));
3628 break;
3629 #endif
3630
3631 default:
3632 SLJIT_ASSERT_STOP();
3633 break;
3634 }
3635 context->ucharptr = 0;
3636 }
3637
3638 #else
3639
3640 /* Unaligned read is unsupported. */
3641 #ifdef COMPILE_PCRE8
3642 if (context->length > 0)
3643 OP1(SLJIT_MOV_UB, context->sourcereg, 0, SLJIT_MEM1(STR_PTR), -context->length);
3644 #else
3645 if (context->length > 0)
3646 OP1(SLJIT_MOV_UH, context->sourcereg, 0, SLJIT_MEM1(STR_PTR), -context->length);
3647 #endif
3648 context->sourcereg = context->sourcereg == TMP1 ? TMP2 : TMP1;
3649
3650 if (othercasebit != 0 && othercasechar == cc)
3651 {
3652 OP2(SLJIT_OR, context->sourcereg, 0, context->sourcereg, 0, SLJIT_IMM, othercasebit);
3653 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, context->sourcereg, 0, SLJIT_IMM, *cc | othercasebit));
3654 }
3655 else
3656 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, context->sourcereg, 0, SLJIT_IMM, *cc));
3657
3658 #endif
3659
3660 cc++;
3661 #ifdef SUPPORT_UTF
3662 utflength--;
3663 }
3664 while (utflength > 0);
3665 #endif
3666
3667 return cc;
3668 }
3669
3670 #if defined SUPPORT_UTF || !defined COMPILE_PCRE8
3671
3672 #define SET_TYPE_OFFSET(value) \
3673 if ((value) != typeoffset) \
3674 { \
3675 if ((value) > typeoffset) \
3676 OP2(SLJIT_SUB, typereg, 0, typereg, 0, SLJIT_IMM, (value) - typeoffset); \
3677 else \
3678 OP2(SLJIT_ADD, typereg, 0, typereg, 0, SLJIT_IMM, typeoffset - (value)); \
3679 } \
3680 typeoffset = (value);
3681
3682 #define SET_CHAR_OFFSET(value) \
3683 if ((value) != charoffset) \
3684 { \
3685 if ((value) > charoffset) \
3686 OP2(SLJIT_SUB, TMP1, 0, TMP1, 0, SLJIT_IMM, (value) - charoffset); \
3687 else \
3688 OP2(SLJIT_ADD, TMP1, 0, TMP1, 0, SLJIT_IMM, charoffset - (value)); \
3689 } \
3690 charoffset = (value);
3691
3692 static void compile_xclass_matchingpath(compiler_common *common, pcre_uchar *cc, jump_list **backtracks)
3693 {
3694 DEFINE_COMPILER;
3695 jump_list *found = NULL;
3696 jump_list **list = (*cc & XCL_NOT) == 0 ? &found : backtracks;
3697 pcre_int32 c, charoffset;
3698 const pcre_uint32 *other_cases;
3699 struct sljit_jump *jump = NULL;
3700 pcre_uchar *ccbegin;
3701 int compares, invertcmp, numberofcmps;
3702 #ifdef SUPPORT_UCP
3703 BOOL needstype = FALSE, needsscript = FALSE, needschar = FALSE;
3704 BOOL charsaved = FALSE;
3705 int typereg = TMP1, scriptreg = TMP1;
3706 pcre_int32 typeoffset;
3707 #endif
3708
3709 /* Although SUPPORT_UTF must be defined, we are
3710 not necessary in utf mode even in 8 bit mode. */
3711 detect_partial_match(common, backtracks);
3712 read_char(common);
3713
3714 if ((*cc++ & XCL_MAP) != 0)
3715 {
3716 OP1(SLJIT_MOV, TMP3, 0, TMP1, 0);
3717 #ifndef COMPILE_PCRE8
3718 jump = CMP(SLJIT_C_GREATER, TMP1, 0, SLJIT_IMM, 255);
3719 #elif defined SUPPORT_UTF
3720 if (common->utf)
3721 jump = CMP(SLJIT_C_GREATER, TMP1, 0, SLJIT_IMM, 255);
3722 #endif
3723
3724 if (!check_class_ranges(common, (const pcre_uint8 *)cc, TRUE, list))
3725 {
3726 OP2(SLJIT_AND, TMP2, 0, TMP1, 0, SLJIT_IMM, 0x7);
3727 OP2(SLJIT_LSHR, TMP1, 0, TMP1, 0, SLJIT_IMM, 3);
3728 OP1(SLJIT_MOV_UB, TMP1, 0, SLJIT_MEM1(TMP1), (sljit_w)cc);
3729 OP2(SLJIT_SHL, TMP2, 0, SLJIT_IMM, 1, TMP2, 0);
3730 OP2(SLJIT_AND | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, TMP2, 0);
3731 add_jump(compiler, list, JUMP(SLJIT_C_NOT_ZERO));
3732 }
3733
3734 #ifndef COMPILE_PCRE8
3735 JUMPHERE(jump);
3736 #elif defined SUPPORT_UTF
3737 if (common->utf)
3738 JUMPHERE(jump);
3739 #endif
3740 OP1(SLJIT_MOV, TMP1, 0, TMP3, 0);
3741 #ifdef SUPPORT_UCP
3742 charsaved = TRUE;
3743 #endif
3744 cc += 32 / sizeof(pcre_uchar);
3745 }
3746
3747 /* Scanning the necessary info. */
3748 ccbegin = cc;
3749 compares = 0;
3750 while (*cc != XCL_END)
3751 {
3752 compares++;
3753 if (*cc == XCL_SINGLE)
3754 {
3755 cc += 2;
3756 #ifdef SUPPORT_UTF
3757 if (common->utf && HAS_EXTRALEN(cc[-1])) cc += GET_EXTRALEN(cc[-1]);
3758 #endif
3759 #ifdef SUPPORT_UCP
3760 needschar = TRUE;
3761 #endif
3762 }
3763 else if (*cc == XCL_RANGE)
3764 {
3765 cc += 2;
3766 #ifdef SUPPORT_UTF
3767 if (common->utf && HAS_EXTRALEN(cc[-1])) cc += GET_EXTRALEN(cc[-1]);
3768 #endif
3769 cc++;
3770 #ifdef SUPPORT_UTF
3771 if (common->utf && HAS_EXTRALEN(cc[-1])) cc += GET_EXTRALEN(cc[-1]);
3772 #endif
3773 #ifdef SUPPORT_UCP
3774 needschar = TRUE;
3775 #endif
3776 }
3777 #ifdef SUPPORT_UCP
3778 else
3779 {
3780 SLJIT_ASSERT(*cc == XCL_PROP || *cc == XCL_NOTPROP);
3781 cc++;
3782 switch(*cc)
3783 {
3784 case PT_ANY:
3785 break;
3786
3787 case PT_LAMP:
3788 case PT_GC:
3789 case PT_PC:
3790 case PT_ALNUM:
3791 needstype = TRUE;
3792 break;
3793
3794 case PT_SC:
3795 needsscript = TRUE;
3796 break;
3797
3798 case PT_SPACE:
3799 case PT_PXSPACE:
3800 case PT_WORD:
3801 needstype = TRUE;
3802 needschar = TRUE;
3803 break;
3804
3805 case PT_CLIST:
3806 needschar = TRUE;
3807 break;
3808
3809 default:
3810 SLJIT_ASSERT_STOP();
3811 break;
3812 }
3813 cc += 2;
3814 }
3815 #endif
3816 }
3817
3818 #ifdef SUPPORT_UCP
3819 /* Simple register allocation. TMP1 is preferred if possible. */
3820 if (needstype || needsscript)
3821 {
3822 if (needschar && !charsaved)
3823 OP1(SLJIT_MOV, TMP3, 0, TMP1, 0);
3824 add_jump(compiler, &common->getucd, JUMP(SLJIT_FAST_CALL));
3825 if (needschar)
3826 {
3827 if (needstype)
3828 {
3829 OP1(SLJIT_MOV, RETURN_ADDR, 0, TMP1, 0);
3830 typereg = RETURN_ADDR;
3831 }
3832
3833 if (needsscript)
3834 scriptreg = TMP3;
3835 OP1(SLJIT_MOV, TMP1, 0, TMP3, 0);
3836 }
3837 else if (needstype && needsscript)
3838 scriptreg = TMP3;
3839 /* In all other cases only one of them was specified, and that can goes to TMP1. */
3840
3841 if (needsscript)
3842 {
3843 if (scriptreg == TMP1)
3844 {
3845 OP1(SLJIT_MOV, scriptreg, 0, SLJIT_IMM, (sljit_w)PRIV(ucd_records) + SLJIT_OFFSETOF(ucd_record, script));
3846 OP1(SLJIT_MOV_UB, scriptreg, 0, SLJIT_MEM2(scriptreg, TMP2), 3);
3847 }
3848 else
3849 {
3850 OP2(SLJIT_SHL, TMP2, 0, TMP2, 0, SLJIT_IMM, 3);
3851 OP2(SLJIT_ADD, TMP2, 0, TMP2, 0, SLJIT_IMM, (sljit_w)PRIV(ucd_records) + SLJIT_OFFSETOF(ucd_record, script));
3852 OP1(SLJIT_MOV_UB, scriptreg, 0, SLJIT_MEM1(TMP2), 0);
3853 }
3854 }
3855 }
3856 #endif
3857
3858 /* Generating code. */
3859 cc = ccbegin;
3860 charoffset = 0;
3861 numberofcmps = 0;
3862 #ifdef SUPPORT_UCP
3863 typeoffset = 0;
3864 #endif
3865
3866 while (*cc != XCL_END)
3867 {
3868 compares--;
3869 invertcmp = (compares == 0 && list != backtracks);
3870 jump = NULL;
3871
3872 if (*cc == XCL_SINGLE)
3873 {
3874 cc ++;
3875 #ifdef SUPPORT_UTF
3876 if (common->utf)
3877 {
3878 GETCHARINC(c, cc);
3879 }
3880 else
3881 #endif
3882 c = *cc++;
3883
3884 if (numberofcmps < 3 && (*cc == XCL_SINGLE || *cc == XCL_RANGE))
3885 {
3886 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, c - charoffset);
3887 COND_VALUE(numberofcmps == 0 ? SLJIT_MOV : SLJIT_OR, TMP2, 0, SLJIT_C_EQUAL);
3888 numberofcmps++;
3889 }
3890 else if (numberofcmps > 0)
3891 {
3892 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, c - charoffset);
3893 COND_VALUE(SLJIT_OR | SLJIT_SET_E, TMP2, 0, SLJIT_C_EQUAL);
3894 jump = JUMP(SLJIT_C_NOT_ZERO ^ invertcmp);
3895 numberofcmps = 0;
3896 }
3897 else
3898 {
3899 jump = CMP(SLJIT_C_EQUAL ^ invertcmp, TMP1, 0, SLJIT_IMM, c - charoffset);
3900 numberofcmps = 0;
3901 }
3902 }
3903 else if (*cc == XCL_RANGE)
3904 {
3905 cc ++;
3906 #ifdef SUPPORT_UTF
3907 if (common->utf)
3908 {
3909 GETCHARINC(c, cc);
3910 }
3911 else
3912 #endif
3913 c = *cc++;
3914 SET_CHAR_OFFSET(c);
3915 #ifdef SUPPORT_UTF
3916 if (common->utf)
3917 {
3918 GETCHARINC(c, cc);
3919 }
3920 else
3921 #endif
3922 c = *cc++;
3923 if (numberofcmps < 3 && (*cc == XCL_SINGLE || *cc == XCL_RANGE))
3924 {
3925 OP2(SLJIT_SUB | SLJIT_SET_U, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, c - charoffset);
3926 COND_VALUE(numberofcmps == 0 ? SLJIT_MOV : SLJIT_OR, TMP2, 0, SLJIT_C_LESS_EQUAL);
3927 numberofcmps++;
3928 }
3929 else if (numberofcmps > 0)
3930 {
3931 OP2(SLJIT_SUB | SLJIT_SET_U, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, c - charoffset);
3932 COND_VALUE(SLJIT_OR | SLJIT_SET_E, TMP2, 0, SLJIT_C_LESS_EQUAL);
3933 jump = JUMP(SLJIT_C_NOT_ZERO ^ invertcmp);
3934 numberofcmps = 0;
3935 }
3936 else
3937 {
3938 jump = CMP(SLJIT_C_LESS_EQUAL ^ invertcmp, TMP1, 0, SLJIT_IMM, c - charoffset);
3939 numberofcmps = 0;
3940 }
3941 }
3942 #ifdef SUPPORT_UCP
3943 else
3944 {
3945 if (*cc == XCL_NOTPROP)
3946 invertcmp ^= 0x1;
3947 cc++;
3948 switch(*cc)
3949 {
3950 case PT_ANY:
3951 if (list != backtracks)
3952 {
3953 if ((cc[-1] == XCL_NOTPROP && compares > 0) || (cc[-1] == XCL_PROP && compares == 0))
3954 continue;
3955 }
3956 else if (cc[-1] == XCL_NOTPROP)
3957 continue;
3958 jump = JUMP(SLJIT_JUMP);
3959 break;
3960
3961 case PT_LAMP:
3962 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, typereg, 0, SLJIT_IMM, ucp_Lu - typeoffset);
3963 COND_VALUE(SLJIT_MOV, TMP2, 0, SLJIT_C_EQUAL);
3964 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, typereg, 0, SLJIT_IMM, ucp_Ll - typeoffset);
3965 COND_VALUE(SLJIT_OR, TMP2, 0, SLJIT_C_EQUAL);
3966 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, typereg, 0, SLJIT_IMM, ucp_Lt - typeoffset);
3967 COND_VALUE(SLJIT_OR | SLJIT_SET_E, TMP2, 0, SLJIT_C_EQUAL);
3968 jump = JUMP(SLJIT_C_NOT_ZERO ^ invertcmp);
3969 break;
3970
3971 case PT_GC:
3972 c = PRIV(ucp_typerange)[(int)cc[1] * 2];
3973 SET_TYPE_OFFSET(c);
3974 jump = CMP(SLJIT_C_LESS_EQUAL ^ invertcmp, typereg, 0, SLJIT_IMM, PRIV(ucp_typerange)[(int)cc[1] * 2 + 1] - c);
3975 break;
3976
3977 case PT_PC:
3978 jump = CMP(SLJIT_C_EQUAL ^ invertcmp, typereg, 0, SLJIT_IMM, (int)cc[1] - typeoffset);
3979 break;
3980
3981 case PT_SC:
3982 jump = CMP(SLJIT_C_EQUAL ^ invertcmp, scriptreg, 0, SLJIT_IMM, (int)cc[1]);
3983 break;
3984
3985 case PT_SPACE:
3986 case PT_PXSPACE:
3987 if (*cc == PT_SPACE)
3988 {
3989 OP1(SLJIT_MOV, TMP2, 0, SLJIT_IMM, 0);
3990 jump = CMP(SLJIT_C_EQUAL, TMP1, 0, SLJIT_IMM, 11 - charoffset);
3991 }
3992 SET_CHAR_OFFSET(9);
3993 OP2(SLJIT_SUB | SLJIT_SET_U, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 13 - 9);
3994 COND_VALUE(SLJIT_MOV, TMP2, 0, SLJIT_C_LESS_EQUAL);
3995 if (*cc == PT_SPACE)
3996 JUMPHERE(jump);
3997
3998 SET_TYPE_OFFSET(ucp_Zl);
3999 OP2(SLJIT_SUB | SLJIT_SET_U, SLJIT_UNUSED, 0, typereg, 0, SLJIT_IMM, ucp_Zs - ucp_Zl);
4000 COND_VALUE(SLJIT_OR | SLJIT_SET_E, TMP2, 0, SLJIT_C_LESS_EQUAL);
4001 jump = JUMP(SLJIT_C_NOT_ZERO ^ invertcmp);
4002 break;
4003
4004 case PT_WORD:
4005 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, CHAR_UNDERSCORE - charoffset);
4006 COND_VALUE(SLJIT_MOV, TMP2, 0, SLJIT_C_EQUAL);
4007 /* ... fall through */
4008
4009 case PT_ALNUM:
4010 SET_TYPE_OFFSET(ucp_Ll);
4011 OP2(SLJIT_SUB | SLJIT_SET_U, SLJIT_UNUSED, 0, typereg, 0, SLJIT_IMM, ucp_Lu - ucp_Ll);
4012 COND_VALUE((*cc == PT_ALNUM) ? SLJIT_MOV : SLJIT_OR, TMP2, 0, SLJIT_C_LESS_EQUAL);
4013 SET_TYPE_OFFSET(ucp_Nd);
4014 OP2(SLJIT_SUB | SLJIT_SET_U, SLJIT_UNUSED, 0, typereg, 0, SLJIT_IMM, ucp_No - ucp_Nd);
4015 COND_VALUE(SLJIT_OR | SLJIT_SET_E, TMP2, 0, SLJIT_C_LESS_EQUAL);
4016 jump = JUMP(SLJIT_C_NOT_ZERO ^ invertcmp);
4017 break;
4018
4019 case PT_CLIST:
4020 other_cases = PRIV(ucd_caseless_sets) + cc[1];
4021
4022 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, *other_cases++ - charoffset);
4023 COND_VALUE(SLJIT_MOV, TMP2, 0, SLJIT_C_EQUAL);
4024
4025 while (*other_cases < NOTACHAR)
4026 {
4027 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, *other_cases++ - charoffset);
4028 COND_VALUE(SLJIT_OR, TMP2, 0, SLJIT_C_EQUAL);
4029 }
4030 jump = JUMP(SLJIT_C_NOT_ZERO ^ invertcmp);
4031 break;
4032 }
4033 cc += 2;
4034 }
4035 #endif
4036
4037 if (jump != NULL)
4038 add_jump(compiler, compares > 0 ? list : backtracks, jump);
4039 }
4040
4041 if (found != NULL)
4042 set_jumps(found, LABEL());
4043 }
4044
4045 #undef SET_TYPE_OFFSET
4046 #undef SET_CHAR_OFFSET
4047
4048 #endif
4049
4050 static pcre_uchar *compile_char1_matchingpath(compiler_common *common, pcre_uchar type, pcre_uchar *cc, jump_list **backtracks)
4051 {
4052 DEFINE_COMPILER;
4053 int length;
4054 unsigned int c, oc, bit;
4055 compare_context context;
4056 struct sljit_jump *jump[4];
4057 #ifdef SUPPORT_UTF
4058 struct sljit_label *label;
4059 #ifdef SUPPORT_UCP
4060 pcre_uchar propdata[5];
4061 #endif
4062 #endif
4063
4064 switch(type)
4065 {
4066 case OP_SOD:
4067 OP1(SLJIT_MOV, TMP1, 0, ARGUMENTS, 0);
4068 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(TMP1), SLJIT_OFFSETOF(jit_arguments, begin));
4069 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, STR_PTR, 0, TMP1, 0));
4070 return cc;
4071
4072 case OP_SOM:
4073 OP1(SLJIT_MOV, TMP1, 0, ARGUMENTS, 0);
4074 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(TMP1), SLJIT_OFFSETOF(jit_arguments, str));
4075 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, STR_PTR, 0, TMP1, 0));
4076 return cc;
4077
4078 case OP_NOT_WORD_BOUNDARY:
4079 case OP_WORD_BOUNDARY:
4080 add_jump(compiler, &common->wordboundary, JUMP(SLJIT_FAST_CALL));
4081 add_jump(compiler, backtracks, JUMP(type == OP_NOT_WORD_BOUNDARY ? SLJIT_C_NOT_ZERO : SLJIT_C_ZERO));
4082 return cc;
4083
4084 case OP_NOT_DIGIT:
4085 case OP_DIGIT:
4086 /* Digits are usually 0-9, so it is worth to optimize them. */
4087 if (common->digits[0] == -2)
4088 get_ctype_ranges(common, ctype_digit, common->digits);
4089 detect_partial_match(common, backtracks);
4090 /* Flip the starting bit in the negative case. */
4091 if (type == OP_NOT_DIGIT)
4092 common->digits[1] ^= 1;
4093 if (!check_ranges(common, common->digits, backtracks, TRUE))
4094 {
4095 read_char8_type(common);
4096 OP2(SLJIT_AND | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, ctype_digit);
4097 add_jump(compiler, backtracks, JUMP(type == OP_DIGIT ? SLJIT_C_ZERO : SLJIT_C_NOT_ZERO));
4098 }
4099 if (type == OP_NOT_DIGIT)
4100 common->digits[1] ^= 1;
4101 return cc;
4102
4103 case OP_NOT_WHITESPACE:
4104 case OP_WHITESPACE:
4105 detect_partial_match(common, backtracks);
4106 read_char8_type(common);
4107 OP2(SLJIT_AND | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, ctype_space);
4108 add_jump(compiler, backtracks, JUMP(type == OP_WHITESPACE ? SLJIT_C_ZERO : SLJIT_C_NOT_ZERO));
4109 return cc;
4110
4111 case OP_NOT_WORDCHAR:
4112 case OP_WORDCHAR:
4113 detect_partial_match(common, backtracks);
4114 read_char8_type(common);
4115 OP2(SLJIT_AND | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, ctype_word);
4116 add_jump(compiler, backtracks, JUMP(type == OP_WORDCHAR ? SLJIT_C_ZERO : SLJIT_C_NOT_ZERO));
4117 return cc;
4118
4119 case OP_ANY:
4120 detect_partial_match(common, backtracks);
4121 read_char(common);
4122 if (common->nltype == NLTYPE_FIXED && common->newline > 255)
4123 {
4124 jump[0] = CMP(SLJIT_C_NOT_EQUAL, TMP1, 0, SLJIT_IMM, (common->newline >> 8) & 0xff);
4125 if (common->mode != JIT_PARTIAL_HARD_COMPILE)
4126 jump[1] = CMP(SLJIT_C_GREATER_EQUAL, STR_PTR, 0, STR_END, 0);
4127 else
4128 jump[1] = check_str_end(common);
4129
4130 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), 0);
4131 add_jump(compiler, backtracks, CMP(SLJIT_C_EQUAL, TMP1, 0, SLJIT_IMM, common->newline & 0xff));
4132 if (jump[1] != NULL)
4133 JUMPHERE(jump[1]);
4134 JUMPHERE(jump[0]);
4135 }
4136 else
4137 check_newlinechar(common, common->nltype, backtracks, TRUE);
4138 return cc;
4139
4140 case OP_ALLANY:
4141 detect_partial_match(common, backtracks);
4142 #ifdef SUPPORT_UTF
4143 if (common->utf)
4144 {
4145 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), 0);
4146 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
4147 #ifdef COMPILE_PCRE8
4148 jump[0] = CMP(SLJIT_C_LESS, TMP1, 0, SLJIT_IMM, 0xc0);
4149 OP1(SLJIT_MOV_UB, TMP1, 0, SLJIT_MEM1(TMP1), (sljit_w)PRIV(utf8_table4) - 0xc0);
4150 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, TMP1, 0);
4151 #else /* COMPILE_PCRE8 */
4152 #ifdef COMPILE_PCRE16
4153 jump[0] = CMP(SLJIT_C_LESS, TMP1, 0, SLJIT_IMM, 0xd800);
4154 OP2(SLJIT_AND, TMP1, 0, TMP1, 0, SLJIT_IMM, 0xfc00);
4155 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0xd800);
4156 COND_VALUE(SLJIT_MOV, TMP1, 0, SLJIT_C_EQUAL);
4157 OP2(SLJIT_SHL, TMP1, 0, TMP1, 0, SLJIT_IMM, 1);
4158 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, TMP1, 0);
4159 #endif /* COMPILE_PCRE16 */
4160 #endif /* COMPILE_PCRE8 */
4161 JUMPHERE(jump[0]);
4162 return cc;
4163 }
4164 #endif
4165 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
4166 return cc;
4167
4168 case OP_ANYBYTE:
4169 detect_partial_match(common, backtracks);
4170 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
4171 return cc;
4172
4173 #ifdef SUPPORT_UTF
4174 #ifdef SUPPORT_UCP
4175 case OP_NOTPROP:
4176 case OP_PROP:
4177 propdata[0] = 0;
4178 propdata[1] = type == OP_NOTPROP ? XCL_NOTPROP : XCL_PROP;
4179 propdata[2] = cc[0];
4180 propdata[3] = cc[1];
4181 propdata[4] = XCL_END;
4182 compile_xclass_matchingpath(common, propdata, backtracks);
4183 return cc + 2;
4184 #endif
4185 #endif
4186
4187 case OP_ANYNL:
4188 detect_partial_match(common, backtracks);
4189 read_char(common);
4190 jump[0] = CMP(SLJIT_C_NOT_EQUAL, TMP1, 0, SLJIT_IMM, CHAR_CR);
4191 /* We don't need to handle soft partial matching case. */
4192 if (common->mode != JIT_PARTIAL_HARD_COMPILE)
4193 jump[1] = CMP(SLJIT_C_GREATER_EQUAL, STR_PTR, 0, STR_END, 0);
4194 else
4195 jump[1] = check_str_end(common);
4196 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), 0);
4197 jump[2] = CMP(SLJIT_C_NOT_EQUAL, TMP1, 0, SLJIT_IMM, CHAR_NL);
4198 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
4199 jump[3] = JUMP(SLJIT_JUMP);
4200 JUMPHERE(jump[0]);
4201 check_newlinechar(common, common->bsr_nltype, backtracks, FALSE);
4202 JUMPHERE(jump[1]);
4203 JUMPHERE(jump[2]);
4204 JUMPHERE(jump[3]);
4205 return cc;
4206
4207 case OP_NOT_HSPACE:
4208 case OP_HSPACE:
4209 detect_partial_match(common, backtracks);
4210 read_char(common);
4211 add_jump(compiler, &common->hspace, JUMP(SLJIT_FAST_CALL));
4212 add_jump(compiler, backtracks, JUMP(type == OP_NOT_HSPACE ? SLJIT_C_NOT_ZERO : SLJIT_C_ZERO));
4213 return cc;
4214
4215 case OP_NOT_VSPACE:
4216 case OP_VSPACE:
4217 detect_partial_match(common, backtracks);
4218 read_char(common);
4219 add_jump(compiler, &common->vspace, JUMP(SLJIT_FAST_CALL));
4220 add_jump(compiler, backtracks, JUMP(type == OP_NOT_VSPACE ? SLJIT_C_NOT_ZERO : SLJIT_C_ZERO));
4221 return cc;
4222
4223 #ifdef SUPPORT_UCP
4224 case OP_EXTUNI:
4225 detect_partial_match(common, backtracks);
4226 read_char(common);
4227 add_jump(compiler, &common->getucd, JUMP(SLJIT_FAST_CALL));
4228 OP1(SLJIT_MOV, TMP1, 0, SLJIT_IMM, (sljit_w)PRIV(ucd_records) + SLJIT_OFFSETOF(ucd_record, gbprop));
4229 /* Optimize register allocation: use a real register. */
4230 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS0, STACK_TOP, 0);
4231 OP1(SLJIT_MOV_UB, STACK_TOP, 0, SLJIT_MEM2(TMP1, TMP2), 3);
4232
4233 label = LABEL();
4234 jump[0] = CMP(SLJIT_C_GREATER_EQUAL, STR_PTR, 0, STR_END, 0);
4235 OP1(SLJIT_MOV, TMP3, 0, STR_PTR, 0);
4236 read_char(common);
4237 add_jump(compiler, &common->getucd, JUMP(SLJIT_FAST_CALL));
4238 OP1(SLJIT_MOV, TMP1, 0, SLJIT_IMM, (sljit_w)PRIV(ucd_records) + SLJIT_OFFSETOF(ucd_record, gbprop));
4239 OP1(SLJIT_MOV_UB, TMP2, 0, SLJIT_MEM2(TMP1, TMP2), 3);
4240
4241 OP2(SLJIT_SHL, STACK_TOP, 0, STACK_TOP, 0, SLJIT_IMM, 2);
4242 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(STACK_TOP), (sljit_w)PRIV(ucp_gbtable));
4243 OP1(SLJIT_MOV, STACK_TOP, 0, TMP2, 0);
4244 OP2(SLJIT_SHL, TMP2, 0, SLJIT_IMM, 1, TMP2, 0);
4245 OP2(SLJIT_AND | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, TMP2, 0);
4246 JUMPTO(SLJIT_C_NOT_ZERO, label);
4247
4248 OP1(SLJIT_MOV, STR_PTR, 0, TMP3, 0);
4249 JUMPHERE(jump[0]);
4250 OP1(SLJIT_MOV, STACK_TOP, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS0);
4251
4252 if (common->mode == JIT_PARTIAL_HARD_COMPILE)
4253 {
4254 jump[0] = CMP(SLJIT_C_LESS, STR_PTR, 0, STR_END, 0);
4255 /* Since we successfully read a char above, partial matching must occure. */
4256 check_partial(common, TRUE);
4257 JUMPHERE(jump[0]);
4258 }
4259 return cc;
4260 #endif
4261
4262 case OP_EODN:
4263 /* Requires rather complex checks. */
4264 jump[0] = CMP(SLJIT_C_GREATER_EQUAL, STR_PTR, 0, STR_END, 0);
4265 if (common->nltype == NLTYPE_FIXED && common->newline > 255)
4266 {
4267 OP2(SLJIT_ADD, TMP2, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(2));
4268 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(0));
4269 if (common->mode == JIT_COMPILE)
4270 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, TMP2, 0, STR_END, 0));
4271 else
4272 {
4273 jump[1] = CMP(SLJIT_C_EQUAL, TMP2, 0, STR_END, 0);
4274 OP2(SLJIT_SUB | SLJIT_SET_U, SLJIT_UNUSED, 0, TMP2, 0, STR_END, 0);
4275 COND_VALUE(SLJIT_MOV, TMP2, 0, SLJIT_C_LESS);
4276 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, (common->newline >> 8) & 0xff);
4277 COND_VALUE(SLJIT_OR | SLJIT_SET_E, TMP2, 0, SLJIT_C_NOT_EQUAL);
4278 add_jump(compiler, backtracks, JUMP(SLJIT_C_NOT_EQUAL));
4279 check_partial(common, TRUE);
4280 add_jump(compiler, backtracks, JUMP(SLJIT_JUMP));
4281 JUMPHERE(jump[1]);
4282 }
4283 OP1(MOV_UCHAR, TMP2, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(1));
4284 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, TMP1, 0, SLJIT_IMM, (common->newline >> 8) & 0xff));
4285 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, TMP2, 0, SLJIT_IMM, common->newline & 0xff));
4286 }
4287 else if (common->nltype == NLTYPE_FIXED)
4288 {
4289 OP2(SLJIT_ADD, TMP2, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
4290 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(0));
4291 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, TMP2, 0, STR_END, 0));
4292 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, TMP1, 0, SLJIT_IMM, common->newline));
4293 }
4294 else
4295 {
4296 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(0));
4297 jump[1] = CMP(SLJIT_C_NOT_EQUAL, TMP1, 0, SLJIT_IMM, CHAR_CR);
4298 OP2(SLJIT_ADD, TMP2, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(2));
4299 OP2(SLJIT_SUB | SLJIT_SET_U, SLJIT_UNUSED, 0, TMP2, 0, STR_END, 0);
4300 jump[2] = JUMP(SLJIT_C_GREATER);
4301 add_jump(compiler, backtracks, JUMP(SLJIT_C_LESS));
4302 /* Equal. */
4303 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(1));
4304 jump[3] = CMP(SLJIT_C_EQUAL, TMP1, 0, SLJIT_IMM, CHAR_NL);
4305 add_jump(compiler, backtracks, JUMP(SLJIT_JUMP));
4306
4307 JUMPHERE(jump[1]);
4308 if (common->nltype == NLTYPE_ANYCRLF)
4309 {
4310 OP2(SLJIT_ADD, TMP2, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
4311 add_jump(compiler, backtracks, CMP(SLJIT_C_LESS, TMP2, 0, STR_END, 0));
4312 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, TMP1, 0, SLJIT_IMM, CHAR_NL));
4313 }
4314 else
4315 {
4316 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS1, STR_PTR, 0);
4317 read_char(common);
4318 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, STR_PTR, 0, STR_END, 0));
4319 add_jump(compiler, &common->anynewline, JUMP(SLJIT_FAST_CALL));
4320 add_jump(compiler, backtracks, JUMP(SLJIT_C_ZERO));
4321 OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS1);
4322 }
4323 JUMPHERE(jump[2]);
4324 JUMPHERE(jump[3]);
4325 }
4326 JUMPHERE(jump[0]);
4327 check_partial(common, FALSE);
4328 return cc;
4329
4330 case OP_EOD:
4331 add_jump(compiler, backtracks, CMP(SLJIT_C_LESS, STR_PTR, 0, STR_END, 0));
4332 check_partial(common, FALSE);
4333 return cc;
4334
4335 case OP_CIRC:
4336 OP1(SLJIT_MOV, TMP2, 0, ARGUMENTS, 0);
4337 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(TMP2), SLJIT_OFFSETOF(jit_arguments, begin));
4338 add_jump(compiler, backtracks, CMP(SLJIT_C_GREATER, STR_PTR, 0, TMP1, 0));
4339 OP1(SLJIT_MOV_UB, TMP2, 0, SLJIT_MEM1(TMP2), SLJIT_OFFSETOF(jit_arguments, notbol));
4340 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, TMP2, 0, SLJIT_IMM, 0));
4341 return cc;
4342
4343 case OP_CIRCM:
4344 OP1(SLJIT_MOV, TMP2, 0, ARGUMENTS, 0);
4345 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(TMP2), SLJIT_OFFSETOF(jit_arguments, begin));
4346 jump[1] = CMP(SLJIT_C_GREATER, STR_PTR, 0, TMP1, 0);
4347 OP1(SLJIT_MOV_UB, TMP2, 0, SLJIT_MEM1(TMP2), SLJIT_OFFSETOF(jit_arguments, notbol));
4348 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, TMP2, 0, SLJIT_IMM, 0));
4349 jump[0] = JUMP(SLJIT_JUMP);
4350 JUMPHERE(jump[1]);
4351
4352 add_jump(compiler, backtracks, CMP(SLJIT_C_GREATER_EQUAL, STR_PTR, 0, STR_END, 0));
4353 if (common->nltype == NLTYPE_FIXED && common->newline > 255)
4354 {
4355 OP2(SLJIT_SUB, TMP2, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(2));
4356 add_jump(compiler, backtracks, CMP(SLJIT_C_LESS, TMP2, 0, TMP1, 0));
4357 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(-2));
4358 OP1(MOV_UCHAR, TMP2, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(-1));
4359 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, TMP1, 0, SLJIT_IMM, (common->newline >> 8) & 0xff));
4360 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, TMP2, 0, SLJIT_IMM, common->newline & 0xff));
4361 }
4362 else
4363 {
4364 skip_char_back(common);
4365 read_char(common);
4366 check_newlinechar(common, common->nltype, backtracks, FALSE);
4367 }
4368 JUMPHERE(jump[0]);
4369 return cc;
4370
4371 case OP_DOLL:
4372 OP1(SLJIT_MOV, TMP2, 0, ARGUMENTS, 0);
4373 OP1(SLJIT_MOV_UB, TMP2, 0, SLJIT_MEM1(TMP2), SLJIT_OFFSETOF(jit_arguments, noteol));
4374 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, TMP2, 0, SLJIT_IMM, 0));
4375
4376 if (!common->endonly)
4377 compile_char1_matchingpath(common, OP_EODN, cc, backtracks);
4378 else
4379 {
4380 add_jump(compiler, backtracks, CMP(SLJIT_C_LESS, STR_PTR, 0, STR_END, 0));
4381 check_partial(common, FALSE);
4382 }
4383 return cc;
4384
4385 case OP_DOLLM:
4386 jump[1] = CMP(SLJIT_C_LESS, STR_PTR, 0, STR_END, 0);
4387 OP1(SLJIT_MOV, TMP2, 0, ARGUMENTS, 0);
4388 OP1(SLJIT_MOV_UB, TMP2, 0, SLJIT_MEM1(TMP2), SLJIT_OFFSETOF(jit_arguments, noteol));
4389 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, TMP2, 0, SLJIT_IMM, 0));
4390 check_partial(common, FALSE);
4391 jump[0] = JUMP(SLJIT_JUMP);
4392 JUMPHERE(jump[1]);
4393
4394 if (common->nltype == NLTYPE_FIXED && common->newline > 255)
4395 {
4396 OP2(SLJIT_ADD, TMP2, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(2));
4397 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(0));
4398 if (common->mode == JIT_COMPILE)
4399 add_jump(compiler, backtracks, CMP(SLJIT_C_GREATER, TMP2, 0, STR_END, 0));
4400 else
4401 {
4402 jump[1] = CMP(SLJIT_C_LESS_EQUAL, TMP2, 0, STR_END, 0);
4403 /* STR_PTR = STR_END - IN_UCHARS(1) */
4404 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, TMP1, 0, SLJIT_IMM, (common->newline >> 8) & 0xff));
4405 check_partial(common, TRUE);
4406 add_jump(compiler, backtracks, JUMP(SLJIT_JUMP));
4407 JUMPHERE(jump[1]);
4408 }
4409
4410 OP1(MOV_UCHAR, TMP2, 0, SLJIT_MEM1(STR_PTR), IN_UCHARS(1));
4411 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, TMP1, 0, SLJIT_IMM, (common->newline >> 8) & 0xff));
4412 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, TMP2, 0, SLJIT_IMM, common->newline & 0xff));
4413 }
4414 else
4415 {
4416 peek_char(common);
4417 check_newlinechar(common, common->nltype, backtracks, FALSE);
4418 }
4419 JUMPHERE(jump[0]);
4420 return cc;
4421
4422 case OP_CHAR:
4423 case OP_CHARI:
4424 length = 1;
4425 #ifdef SUPPORT_UTF
4426 if (common->utf && HAS_EXTRALEN(*cc)) length += GET_EXTRALEN(*cc);
4427 #endif
4428 if (common->mode == JIT_COMPILE && (type == OP_CHAR || !char_has_othercase(common, cc) || char_get_othercase_bit(common, cc) != 0))
4429 {
4430 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(length));
4431 add_jump(compiler, backtracks, CMP(SLJIT_C_GREATER, STR_PTR, 0, STR_END, 0));
4432
4433 context.length = IN_UCHARS(length);
4434 context.sourcereg = -1;
4435 #if defined SLJIT_UNALIGNED && SLJIT_UNALIGNED
4436 context.ucharptr = 0;
4437 #endif
4438 return byte_sequence_compare(common, type == OP_CHARI, cc, &context, backtracks);
4439 }
4440 detect_partial_match(common, backtracks);
4441 read_char(common);
4442 #ifdef SUPPORT_UTF
4443 if (common->utf)
4444 {
4445 GETCHAR(c, cc);
4446 }
4447 else
4448 #endif
4449 c = *cc;
4450 if (type == OP_CHAR || !char_has_othercase(common, cc))
4451 {
4452 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, TMP1, 0, SLJIT_IMM, c));
4453 return cc + length;
4454 }
4455 oc = char_othercase(common, c);
4456 bit = c ^ oc;
4457 if (ispowerof2(bit))
4458 {
4459 OP2(SLJIT_OR, TMP1, 0, TMP1, 0, SLJIT_IMM, bit);
4460 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, TMP1, 0, SLJIT_IMM, c | bit));
4461 return cc + length;
4462 }
4463 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, c);
4464 COND_VALUE(SLJIT_MOV, TMP2, 0, SLJIT_C_EQUAL);
4465 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, oc);
4466 COND_VALUE(SLJIT_OR | SLJIT_SET_E, TMP2, 0, SLJIT_C_EQUAL);
4467 add_jump(compiler, backtracks, JUMP(SLJIT_C_ZERO));
4468 return cc + length;
4469
4470 case OP_NOT:
4471 case OP_NOTI:
4472 detect_partial_match(common, backtracks);
4473 length = 1;
4474 #ifdef SUPPORT_UTF
4475 if (common->utf)
4476 {
4477 #ifdef COMPILE_PCRE8
4478 c = *cc;
4479 if (c < 128)
4480 {
4481 OP1(SLJIT_MOV_UB, TMP1, 0, SLJIT_MEM1(STR_PTR), 0);
4482 if (type == OP_NOT || !char_has_othercase(common, cc))
4483 add_jump(compiler, backtracks, CMP(SLJIT_C_EQUAL, TMP1, 0, SLJIT_IMM, c));
4484 else
4485 {
4486 /* Since UTF8 code page is fixed, we know that c is in [a-z] or [A-Z] range. */
4487 OP2(SLJIT_OR, TMP2, 0, TMP1, 0, SLJIT_IMM, 0x20);
4488 add_jump(compiler, backtracks, CMP(SLJIT_C_EQUAL, TMP2, 0, SLJIT_IMM, c | 0x20));
4489 }
4490 /* Skip the variable-length character. */
4491 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
4492 jump[0] = CMP(SLJIT_C_LESS, TMP1, 0, SLJIT_IMM, 0xc0);
4493 OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(TMP1), (sljit_w)PRIV(utf8_table4) - 0xc0);
4494 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, TMP1, 0);
4495 JUMPHERE(jump[0]);
4496 return cc + 1;
4497 }
4498 else
4499 #endif /* COMPILE_PCRE8 */
4500 {
4501 GETCHARLEN(c, cc, length);
4502 read_char(common);
4503 }
4504 }
4505 else
4506 #endif /* SUPPORT_UTF */
4507 {
4508 read_char(common);
4509 c = *cc;
4510 }
4511
4512 if (type == OP_NOT || !char_has_othercase(common, cc))
4513 add_jump(compiler, backtracks, CMP(SLJIT_C_EQUAL, TMP1, 0, SLJIT_IMM, c));
4514 else
4515 {
4516 oc = char_othercase(common, c);
4517 bit = c ^ oc;
4518 if (ispowerof2(bit))
4519 {
4520 OP2(SLJIT_OR, TMP1, 0, TMP1, 0, SLJIT_IMM, bit);
4521 add_jump(compiler, backtracks, CMP(SLJIT_C_EQUAL, TMP1, 0, SLJIT_IMM, c | bit));
4522 }
4523 else
4524 {
4525 add_jump(compiler, backtracks, CMP(SLJIT_C_EQUAL, TMP1, 0, SLJIT_IMM, c));
4526 add_jump(compiler, backtracks, CMP(SLJIT_C_EQUAL, TMP1, 0, SLJIT_IMM, oc));
4527 }
4528 }
4529 return cc + length;
4530
4531 case OP_CLASS:
4532 case OP_NCLASS:
4533 detect_partial_match(common, backtracks);
4534 read_char(common);
4535 if (check_class_ranges(common, (const pcre_uint8 *)cc, type == OP_NCLASS, backtracks))
4536 return cc + 32 / sizeof(pcre_uchar);
4537
4538 #if defined SUPPORT_UTF || !defined COMPILE_PCRE8
4539 jump[0] = NULL;
4540 #ifdef COMPILE_PCRE8
4541 /* This check only affects 8 bit mode. In other modes, we
4542 always need to compare the value with 255. */
4543 if (common->utf)
4544 #endif /* COMPILE_PCRE8 */
4545 {
4546 jump[0] = CMP(SLJIT_C_GREATER, TMP1, 0, SLJIT_IMM, 255);
4547 if (type == OP_CLASS)
4548 {
4549 add_jump(compiler, backtracks, jump[0]);
4550 jump[0] = NULL;
4551 }
4552 }
4553 #endif /* SUPPORT_UTF || !COMPILE_PCRE8 */
4554 OP2(SLJIT_AND, TMP2, 0, TMP1, 0, SLJIT_IMM, 0x7);
4555 OP2(SLJIT_LSHR, TMP1, 0, TMP1, 0, SLJIT_IMM, 3);
4556 OP1(SLJIT_MOV_UB, TMP1, 0, SLJIT_MEM1(TMP1), (sljit_w)cc);
4557 OP2(SLJIT_SHL, TMP2, 0, SLJIT_IMM, 1, TMP2, 0);
4558 OP2(SLJIT_AND | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, TMP2, 0);
4559 add_jump(compiler, backtracks, JUMP(SLJIT_C_ZERO));
4560 #if defined SUPPORT_UTF || !defined COMPILE_PCRE8
4561 if (jump[0] != NULL)
4562 JUMPHERE(jump[0]);
4563 #endif /* SUPPORT_UTF || !COMPILE_PCRE8 */
4564 return cc + 32 / sizeof(pcre_uchar);
4565
4566 #if defined SUPPORT_UTF || defined COMPILE_PCRE16
4567 case OP_XCLASS:
4568 compile_xclass_matchingpath(common, cc + LINK_SIZE, backtracks);
4569 return cc + GET(cc, 0) - 1;
4570 #endif
4571
4572 case OP_REVERSE:
4573 length = GET(cc, 0);
4574 if (length == 0)
4575 return cc + LINK_SIZE;
4576 OP1(SLJIT_MOV, TMP1, 0, ARGUMENTS, 0);
4577 #ifdef SUPPORT_UTF
4578 if (common->utf)
4579 {
4580 OP1(SLJIT_MOV, TMP3, 0, SLJIT_MEM1(TMP1), SLJIT_OFFSETOF(jit_arguments, begin));
4581 OP1(SLJIT_MOV, TMP2, 0, SLJIT_IMM, length);
4582 label = LABEL();
4583 add_jump(compiler, backtracks, CMP(SLJIT_C_LESS_EQUAL, STR_PTR, 0, TMP3, 0));
4584 skip_char_back(common);
4585 OP2(SLJIT_SUB | SLJIT_SET_E, TMP2, 0, TMP2, 0, SLJIT_IMM, 1);
4586 JUMPTO(SLJIT_C_NOT_ZERO, label);
4587 }
4588 else
4589 #endif
4590 {
4591 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(TMP1), SLJIT_OFFSETOF(jit_arguments, begin));
4592 OP2(SLJIT_SUB, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(length));
4593 add_jump(compiler, backtracks, CMP(SLJIT_C_LESS, STR_PTR, 0, TMP1, 0));
4594 }
4595 check_start_used_ptr(common);
4596 return cc + LINK_SIZE;
4597 }
4598 SLJIT_ASSERT_STOP();
4599 return cc;
4600 }
4601
4602 static SLJIT_INLINE pcre_uchar *compile_charn_matchingpath(compiler_common *common, pcre_uchar *cc, pcre_uchar *ccend, jump_list **backtracks)
4603 {
4604 /* This function consumes at least one input character. */
4605 /* To decrease the number of length checks, we try to concatenate the fixed length character sequences. */
4606 DEFINE_COMPILER;
4607 pcre_uchar *ccbegin = cc;
4608 compare_context context;
4609 int size;
4610
4611 context.length = 0;
4612 do
4613 {
4614 if (cc >= ccend)
4615 break;
4616
4617 if (*cc == OP_CHAR)
4618 {
4619 size = 1;
4620 #ifdef SUPPORT_UTF
4621 if (common->utf && HAS_EXTRALEN(cc[1]))
4622 size += GET_EXTRALEN(cc[1]);
4623 #endif
4624 }
4625 else if (*cc == OP_CHARI)
4626 {
4627 size = 1;
4628 #ifdef SUPPORT_UTF
4629 if (common->utf)
4630 {
4631 if (char_has_othercase(common, cc + 1) && char_get_othercase_bit(common, cc + 1) == 0)
4632 size = 0;
4633 else if (HAS_EXTRALEN(cc[1]))
4634 size += GET_EXTRALEN(cc[1]);
4635 }
4636 else
4637 #endif
4638 if (char_has_othercase(common, cc + 1) && char_get_othercase_bit(common, cc + 1) == 0)
4639 size = 0;
4640 }
4641 else
4642 size = 0;
4643
4644 cc += 1 + size;
4645 context.length += IN_UCHARS(size);
4646 }
4647 while (size > 0 && context.length <= 128);
4648
4649 cc = ccbegin;
4650 if (context.length > 0)
4651 {
4652 /* We have a fixed-length byte sequence. */
4653 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, context.length);
4654 add_jump(compiler, backtracks, CMP(SLJIT_C_GREATER, STR_PTR, 0, STR_END, 0));
4655
4656 context.sourcereg = -1;
4657 #if defined SLJIT_UNALIGNED && SLJIT_UNALIGNED
4658 context.ucharptr = 0;
4659 #endif
4660 do cc = byte_sequence_compare(common, *cc == OP_CHARI, cc + 1, &context, backtracks); while (context.length > 0);
4661 return cc;
4662 }
4663
4664 /* A non-fixed length character will be checked if length == 0. */
4665 return compile_char1_matchingpath(common, *cc, cc + 1, backtracks);
4666 }
4667
4668 static struct sljit_jump *compile_ref_checks(compiler_common *common, pcre_uchar *cc, jump_list **backtracks)
4669 {
4670 DEFINE_COMPILER;
4671 int offset = GET2(cc, 1) << 1;
4672
4673 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(offset));
4674 if (!common->jscript_compat)
4675 {
4676 if (backtracks == NULL)
4677 {
4678 /* OVECTOR(1) contains the "string begin - 1" constant. */
4679 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(1));
4680 COND_VALUE(SLJIT_MOV, TMP2, 0, SLJIT_C_EQUAL);
4681 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(offset + 1));
4682 COND_VALUE(SLJIT_OR | SLJIT_SET_E, TMP2, 0, SLJIT_C_EQUAL);
4683 return JUMP(SLJIT_C_NOT_ZERO);
4684 }
4685 add_jump(compiler, backtracks, CMP(SLJIT_C_EQUAL, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(1)));
4686 }
4687 return CMP(SLJIT_C_EQUAL, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(offset + 1));
4688 }
4689
4690 /* Forward definitions. */
4691 static void compile_matchingpath(compiler_common *, pcre_uchar *, pcre_uchar *, backtrack_common *);
4692 static void compile_backtrackingpath(compiler_common *, struct backtrack_common *);
4693
4694 #define PUSH_BACKTRACK(size, ccstart, error) \
4695 do \
4696 { \
4697 backtrack = sljit_alloc_memory(compiler, (size)); \
4698 if (SLJIT_UNLIKELY(sljit_get_compiler_error(compiler))) \
4699 return error; \
4700 memset(backtrack, 0, size); \
4701 backtrack->prev = parent->top; \
4702 backtrack->cc = (ccstart); \
4703 parent->top = backtrack; \
4704 } \
4705 while (0)
4706
4707 #define PUSH_BACKTRACK_NOVALUE(size, ccstart) \
4708 do \
4709 { \
4710 backtrack = sljit_alloc_memory(compiler, (size)); \
4711 if (SLJIT_UNLIKELY(sljit_get_compiler_error(compiler))) \
4712 return; \
4713 memset(backtrack, 0, size); \
4714 backtrack->prev = parent->top; \
4715 backtrack->cc = (ccstart); \
4716 parent->top = backtrack; \
4717 } \
4718 while (0)
4719
4720 #define BACKTRACK_AS(type) ((type *)backtrack)
4721
4722 static pcre_uchar *compile_ref_matchingpath(compiler_common *common, pcre_uchar *cc, jump_list **backtracks, BOOL withchecks, BOOL emptyfail)
4723 {
4724 DEFINE_COMPILER;
4725 int offset = GET2(cc, 1) << 1;
4726 struct sljit_jump *jump = NULL;
4727 struct sljit_jump *partial;
4728 struct sljit_jump *nopartial;
4729
4730 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(offset));
4731 /* OVECTOR(1) contains the "string begin - 1" constant. */
4732 if (withchecks && !common->jscript_compat)
4733 add_jump(compiler, backtracks, CMP(SLJIT_C_EQUAL, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(1)));
4734
4735 #if defined SUPPORT_UTF && defined SUPPORT_UCP
4736 if (common->utf && *cc == OP_REFI)
4737 {
4738 SLJIT_ASSERT(TMP1 == SLJIT_TEMPORARY_REG1 && STACK_TOP == SLJIT_TEMPORARY_REG2 && TMP2 == SLJIT_TEMPORARY_REG3);
4739 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(offset + 1));
4740 if (withchecks)
4741 jump = CMP(SLJIT_C_EQUAL, TMP1, 0, TMP2, 0);
4742
4743 /* Needed to save important temporary registers. */
4744 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS0, STACK_TOP, 0);
4745 OP1(SLJIT_MOV, SLJIT_TEMPORARY_REG2, 0, ARGUMENTS, 0);
4746 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_TEMPORARY_REG2), SLJIT_OFFSETOF(jit_arguments, uchar_ptr), STR_PTR, 0);
4747 sljit_emit_ijump(compiler, SLJIT_CALL3, SLJIT_IMM, SLJIT_FUNC_OFFSET(do_utf_caselesscmp));
4748 OP1(SLJIT_MOV, STACK_TOP, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS0);
4749 if (common->mode == JIT_COMPILE)
4750 add_jump(compiler, backtracks, CMP(SLJIT_C_LESS_EQUAL, SLJIT_RETURN_REG, 0, SLJIT_IMM, 1));
4751 else
4752 {
4753 add_jump(compiler, backtracks, CMP(SLJIT_C_EQUAL, SLJIT_RETURN_REG, 0, SLJIT_IMM, 0));
4754 nopartial = CMP(SLJIT_C_NOT_EQUAL, SLJIT_RETURN_REG, 0, SLJIT_IMM, 1);
4755 check_partial(common, FALSE);
4756 add_jump(compiler, backtracks, JUMP(SLJIT_JUMP));
4757 JUMPHERE(nopartial);
4758 }
4759 OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_RETURN_REG, 0);
4760 }
4761 else
4762 #endif /* SUPPORT_UTF && SUPPORT_UCP */
4763 {
4764 OP2(SLJIT_SUB | SLJIT_SET_E, TMP2, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(offset + 1), TMP1, 0);
4765 if (withchecks)
4766 jump = JUMP(SLJIT_C_ZERO);
4767
4768 OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, TMP2, 0);
4769 partial = CMP(SLJIT_C_GREATER, STR_PTR, 0, STR_END, 0);
4770 if (common->mode == JIT_COMPILE)
4771 add_jump(compiler, backtracks, partial);
4772
4773 add_jump(compiler, *cc == OP_REF ? &common->casefulcmp : &common->caselesscmp, JUMP(SLJIT_FAST_CALL));
4774 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, TMP2, 0, SLJIT_IMM, 0));
4775
4776 if (common->mode != JIT_COMPILE)
4777 {
4778 nopartial = JUMP(SLJIT_JUMP);
4779 JUMPHERE(partial);
4780 /* TMP2 -= STR_END - STR_PTR */
4781 OP2(SLJIT_SUB, TMP2, 0, TMP2, 0, STR_PTR, 0);
4782 OP2(SLJIT_ADD, TMP2, 0, TMP2, 0, STR_END, 0);
4783 partial = CMP(SLJIT_C_EQUAL, TMP2, 0, SLJIT_IMM, 0);
4784 OP1(SLJIT_MOV, STR_PTR, 0, STR_END, 0);
4785 add_jump(compiler, *cc == OP_REF ? &common->casefulcmp : &common->caselesscmp, JUMP(SLJIT_FAST_CALL));
4786 add_jump(compiler, backtracks, CMP(SLJIT_C_NOT_EQUAL, TMP2, 0, SLJIT_IMM, 0));
4787 JUMPHERE(partial);
4788 check_partial(common, FALSE);
4789 add_jump(compiler, backtracks, JUMP(SLJIT_JUMP));
4790 JUMPHERE(nopartial);
4791 }
4792 }
4793
4794 if (jump != NULL)
4795 {
4796 if (emptyfail)
4797 add_jump(compiler, backtracks, jump);
4798 else
4799 JUMPHERE(jump);
4800 }
4801 return cc + 1 + IMM2_SIZE;
4802 }
4803
4804 static SLJIT_INLINE pcre_uchar *compile_ref_iterator_matchingpath(compiler_common *common, pcre_uchar *cc, backtrack_common *parent)
4805 {
4806 DEFINE_COMPILER;
4807 backtrack_common *backtrack;
4808 pcre_uchar type;
4809 struct sljit_label *label;
4810 struct sljit_jump *zerolength;
4811 struct sljit_jump *jump = NULL;
4812 pcre_uchar *ccbegin = cc;
4813 int min = 0, max = 0;
4814 BOOL minimize;
4815
4816 PUSH_BACKTRACK(sizeof(iterator_backtrack), cc, NULL);
4817
4818 type = cc[1 + IMM2_SIZE];
4819 minimize = (type & 0x1) != 0;
4820 switch(type)
4821 {
4822 case OP_CRSTAR:
4823 case OP_CRMINSTAR:
4824 min = 0;
4825 max = 0;
4826 cc += 1 + IMM2_SIZE + 1;
4827 break;
4828 case OP_CRPLUS:
4829 case OP_CRMINPLUS:
4830 min = 1;
4831 max = 0;
4832 cc += 1 + IMM2_SIZE + 1;
4833 break;
4834 case OP_CRQUERY:
4835 case OP_CRMINQUERY:
4836 min = 0;
4837 max = 1;
4838 cc += 1 + IMM2_SIZE + 1;
4839 break;
4840 case OP_CRRANGE:
4841 case OP_CRMINRANGE:
4842 min = GET2(cc, 1 + IMM2_SIZE + 1);
4843 max = GET2(cc, 1 + IMM2_SIZE + 1 + IMM2_SIZE);
4844 cc += 1 + IMM2_SIZE + 1 + 2 * IMM2_SIZE;
4845 break;
4846 default:
4847 SLJIT_ASSERT_STOP();
4848 break;
4849 }
4850
4851 if (!minimize)
4852 {
4853 if (min == 0)
4854 {
4855 allocate_stack(common, 2);
4856 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), STR_PTR, 0);
4857 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(1), SLJIT_IMM, 0);
4858 /* Temporary release of STR_PTR. */
4859 OP2(SLJIT_SUB, STACK_TOP, 0, STACK_TOP, 0, SLJIT_IMM, sizeof(sljit_w));
4860 zerolength = compile_ref_checks(common, ccbegin, NULL);
4861 /* Restore if not zero length. */
4862 OP2(SLJIT_ADD, STACK_TOP, 0, STACK_TOP, 0, SLJIT_IMM, sizeof(sljit_w));
4863 }
4864 else
4865 {
4866 allocate_stack(common, 1);
4867 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), SLJIT_IMM, 0);
4868 zerolength = compile_ref_checks(common, ccbegin, &backtrack->topbacktracks);
4869 }
4870
4871 if (min > 1 || max > 1)
4872 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), POSSESSIVE0, SLJIT_IMM, 0);
4873
4874 label = LABEL();
4875 compile_ref_matchingpath(common, ccbegin, &backtrack->topbacktracks, FALSE, FALSE);
4876
4877 if (min > 1 || max > 1)
4878 {
4879 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), POSSESSIVE0);
4880 OP2(SLJIT_ADD, TMP1, 0, TMP1, 0, SLJIT_IMM, 1);
4881 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), POSSESSIVE0, TMP1, 0);
4882 if (min > 1)
4883 CMPTO(SLJIT_C_LESS, TMP1, 0, SLJIT_IMM, min, label);
4884 if (max > 1)
4885 {
4886 jump = CMP(SLJIT_C_GREATER_EQUAL, TMP1, 0, SLJIT_IMM, max);
4887 allocate_stack(common, 1);
4888 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), STR_PTR, 0);
4889 JUMPTO(SLJIT_JUMP, label);
4890 JUMPHERE(jump);
4891 }
4892 }
4893
4894 if (max == 0)
4895 {
4896 /* Includes min > 1 case as well. */
4897 allocate_stack(common, 1);
4898 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), STR_PTR, 0);
4899 JUMPTO(SLJIT_JUMP, label);
4900 }
4901
4902 JUMPHERE(zerolength);
4903 BACKTRACK_AS(iterator_backtrack)->matchingpath = LABEL();
4904
4905 decrease_call_count(common);
4906 return cc;
4907 }
4908
4909 allocate_stack(common, 2);
4910 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), SLJIT_IMM, 0);
4911 if (type != OP_CRMINSTAR)
4912 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(1), SLJIT_IMM, 0);
4913
4914 if (min == 0)
4915 {
4916 zerolength = compile_ref_checks(common, ccbegin, NULL);
4917 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), STR_PTR, 0);
4918 jump = JUMP(SLJIT_JUMP);
4919 }
4920 else
4921 zerolength = compile_ref_checks(common, ccbegin, &backtrack->topbacktracks);
4922
4923 BACKTRACK_AS(iterator_backtrack)->matchingpath = LABEL();
4924 if (max > 0)
4925 add_jump(compiler, &backtrack->topbacktracks, CMP(SLJIT_C_GREATER_EQUAL, SLJIT_MEM1(STACK_TOP), STACK(1), SLJIT_IMM, max));
4926
4927 compile_ref_matchingpath(common, ccbegin, &backtrack->topbacktracks, TRUE, TRUE);
4928 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), STR_PTR, 0);
4929
4930 if (min > 1)
4931 {
4932 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(STACK_TOP), STACK(1));
4933 OP2(SLJIT_ADD, TMP1, 0, TMP1, 0, SLJIT_IMM, 1);
4934 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(1), TMP1, 0);
4935 CMPTO(SLJIT_C_LESS, TMP1, 0, SLJIT_IMM, min, BACKTRACK_AS(iterator_backtrack)->matchingpath);
4936 }
4937 else if (max > 0)
4938 OP2(SLJIT_ADD, SLJIT_MEM1(STACK_TOP), STACK(1), SLJIT_MEM1(STACK_TOP), STACK(1), SLJIT_IMM, 1);
4939
4940 if (jump != NULL)
4941 JUMPHERE(jump);
4942 JUMPHERE(zerolength);
4943
4944 decrease_call_count(common);
4945 return cc;
4946 }
4947
4948 static SLJIT_INLINE pcre_uchar *compile_recurse_matchingpath(compiler_common *common, pcre_uchar *cc, backtrack_common *parent)
4949 {
4950 DEFINE_COMPILER;
4951 backtrack_common *backtrack;
4952 recurse_entry *entry = common->entries;
4953 recurse_entry *prev = NULL;
4954 int start = GET(cc, 1);
4955
4956 PUSH_BACKTRACK(sizeof(recurse_backtrack), cc, NULL);
4957 while (entry != NULL)
4958 {
4959 if (entry->start == start)
4960 break;
4961 prev = entry;
4962 entry = entry->next;
4963 }
4964
4965 if (entry == NULL)
4966 {
4967 entry = sljit_alloc_memory(compiler, sizeof(recurse_entry));
4968 if (SLJIT_UNLIKELY(sljit_get_compiler_error(compiler)))
4969 return NULL;
4970 entry->next = NULL;
4971 entry->entry = NULL;
4972 entry->calls = NULL;
4973 entry->start = start;
4974
4975 if (prev != NULL)
4976 prev->next = entry;
4977 else
4978 common->entries = entry;
4979 }
4980
4981 if (common->has_set_som && common->mark_ptr != 0)
4982 {
4983 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(0));
4984 allocate_stack(common, 2);
4985 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), common->mark_ptr);
4986 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), TMP2, 0);
4987 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(1), TMP1, 0);
4988 }
4989 else if (common->has_set_som || common->mark_ptr != 0)
4990 {
4991 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), common->has_set_som ? (int)(OVECTOR(0)) : common->mark_ptr);
4992 allocate_stack(common, 1);
4993 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), TMP2, 0);
4994 }
4995
4996 if (entry->entry == NULL)
4997 add_jump(compiler, &entry->calls, JUMP(SLJIT_FAST_CALL));
4998 else
4999 JUMPTO(SLJIT_FAST_CALL, entry->entry);
5000 /* Leave if the match is failed. */
5001 add_jump(compiler, &backtrack->topbacktracks, CMP(SLJIT_C_EQUAL, TMP1, 0, SLJIT_IMM, 0));
5002 return cc + 1 + LINK_SIZE;
5003 }
5004
5005 static pcre_uchar *compile_assert_matchingpath(compiler_common *common, pcre_uchar *cc, assert_backtrack *backtrack, BOOL conditional)
5006 {
5007 DEFINE_COMPILER;
5008 int framesize;
5009 int private_data_ptr;
5010 backtrack_common altbacktrack;
5011 pcre_uchar *ccbegin;
5012 pcre_uchar opcode;
5013 pcre_uchar bra = OP_BRA;
5014 jump_list *tmp = NULL;
5015 jump_list **target = (conditional) ? &backtrack->condfailed : &backtrack->common.topbacktracks;
5016 jump_list **found;
5017 /* Saving previous accept variables. */
5018 struct sljit_label *save_quitlabel = common->quitlabel;
5019 struct sljit_label *save_acceptlabel = common->acceptlabel;
5020 jump_list *save_quit = common->quit;
5021 jump_list *save_accept = common->accept;
5022 struct sljit_jump *jump;
5023 struct sljit_jump *brajump = NULL;
5024
5025 if (*cc == OP_BRAZERO || *cc == OP_BRAMINZERO)
5026 {
5027 SLJIT_ASSERT(!conditional);
5028 bra = *cc;
5029 cc++;
5030 }
5031 private_data_ptr = PRIVATE_DATA(cc);
5032 SLJIT_ASSERT(private_data_ptr != 0);
5033 framesize = get_framesize(common, cc, FALSE);
5034 backtrack->framesize = framesize;
5035 backtrack->private_data_ptr = private_data_ptr;
5036 opcode = *cc;
5037 SLJIT_ASSERT(opcode >= OP_ASSERT && opcode <= OP_ASSERTBACK_NOT);
5038 found = (opcode == OP_ASSERT || opcode == OP_ASSERTBACK) ? &tmp : target;
5039 ccbegin = cc;
5040 cc += GET(cc, 1);
5041
5042 if (bra == OP_BRAMINZERO)
5043 {
5044 /* This is a braminzero backtrack path. */
5045 OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_MEM1(STACK_TOP), STACK(0));
5046 free_stack(common, 1);
5047 brajump = CMP(SLJIT_C_EQUAL, STR_PTR, 0, SLJIT_IMM, 0);
5048 }
5049
5050 if (framesize < 0)
5051 {
5052 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, STACK_TOP, 0);
5053 allocate_stack(common, 1);
5054 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), STR_PTR, 0);
5055 }
5056 else
5057 {
5058 allocate_stack(common, framesize + 2);
5059 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr);
5060 OP2(SLJIT_SUB, TMP2, 0, STACK_TOP, 0, SLJIT_IMM, -STACK(framesize + 1));
5061 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, TMP2, 0);
5062 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), STR_PTR, 0);
5063 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(1), TMP1, 0);
5064 init_frame(common, ccbegin, framesize + 1, 2, FALSE);
5065 }
5066
5067 memset(&altbacktrack, 0, sizeof(backtrack_common));
5068 common->quitlabel = NULL;
5069 common->quit = NULL;
5070 while (1)
5071 {
5072 common->acceptlabel = NULL;
5073 common->accept = NULL;
5074 altbacktrack.top = NULL;
5075 altbacktrack.topbacktracks = NULL;
5076
5077 if (*ccbegin == OP_ALT)
5078 OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_MEM1(STACK_TOP), STACK(0));
5079
5080 altbacktrack.cc = ccbegin;
5081 compile_matchingpath(common, ccbegin + 1 + LINK_SIZE, cc, &altbacktrack);
5082 if (SLJIT_UNLIKELY(sljit_get_compiler_error(compiler)))
5083 {
5084 common->quitlabel = save_quitlabel;
5085 common->acceptlabel = save_acceptlabel;
5086 common->quit = save_quit;
5087 common->accept = save_accept;
5088 return NULL;
5089 }
5090 common->acceptlabel = LABEL();
5091 if (common->accept != NULL)
5092 set_jumps(common->accept, common->acceptlabel);
5093
5094 /* Reset stack. */
5095 if (framesize < 0)
5096 OP1(SLJIT_MOV, STACK_TOP, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr);
5097 else {
5098 if ((opcode != OP_ASSERT_NOT && opcode != OP_ASSERTBACK_NOT) || conditional)
5099 {
5100 /* We don't need to keep the STR_PTR, only the previous private_data_ptr. */
5101 OP2(SLJIT_ADD, STACK_TOP, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, SLJIT_IMM, (framesize + 1) * sizeof(sljit_w));
5102 }
5103 else
5104 {
5105 OP1(SLJIT_MOV, STACK_TOP, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr);
5106 add_jump(compiler, &common->revertframes, JUMP(SLJIT_FAST_CALL));
5107 }
5108 }
5109
5110 if (opcode == OP_ASSERT_NOT || opcode == OP_ASSERTBACK_NOT)
5111 {
5112 /* We know that STR_PTR was stored on the top of the stack. */
5113 if (conditional)
5114 OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_MEM1(STACK_TOP), 0);
5115 else if (bra == OP_BRAZERO)
5116 {
5117 if (framesize < 0)
5118 OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_MEM1(STACK_TOP), 0);
5119 else
5120 {
5121 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(STACK_TOP), framesize * sizeof(sljit_w));
5122 OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_MEM1(STACK_TOP), (framesize + 1) * sizeof(sljit_w));
5123 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, TMP1, 0);
5124 }
5125 OP2(SLJIT_ADD, STACK_TOP, 0, STACK_TOP, 0, SLJIT_IMM, sizeof(sljit_w));
5126 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), SLJIT_IMM, 0);
5127 }
5128 else if (framesize >= 0)
5129 {
5130 /* For OP_BRA and OP_BRAMINZERO. */
5131 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, SLJIT_MEM1(STACK_TOP), framesize * sizeof(sljit_w));
5132 }
5133 }
5134 add_jump(compiler, found, JUMP(SLJIT_JUMP));
5135
5136 compile_backtrackingpath(common, altbacktrack.top);
5137 if (SLJIT_UNLIKELY(sljit_get_compiler_error(compiler)))
5138 {
5139 common->quitlabel = save_quitlabel;
5140 common->acceptlabel = save_acceptlabel;
5141 common->quit = save_quit;
5142 common->accept = save_accept;
5143 return NULL;
5144 }
5145 set_jumps(altbacktrack.topbacktracks, LABEL());
5146
5147 if (*cc != OP_ALT)
5148 break;
5149
5150 ccbegin = cc;
5151 cc += GET(cc, 1);
5152 }
5153 /* None of them matched. */
5154 if (common->quit != NULL)
5155 set_jumps(common->quit, LABEL());
5156
5157 if (opcode == OP_ASSERT || opcode == OP_ASSERTBACK)
5158 {
5159 /* Assert is failed. */
5160 if (conditional || bra == OP_BRAZERO)
5161 OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_MEM1(STACK_TOP), STACK(0));
5162
5163 if (framesize < 0)
5164 {
5165 /* The topmost item should be 0. */
5166 if (bra == OP_BRAZERO)
5167 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), SLJIT_IMM, 0);
5168 else
5169 free_stack(common, 1);
5170 }
5171 else
5172 {
5173 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(STACK_TOP), STACK(1));
5174 /* The topmost item should be 0. */
5175 if (bra == OP_BRAZERO)
5176 {
5177 free_stack(common, framesize + 1);
5178 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), SLJIT_IMM, 0);
5179 }
5180 else
5181 free_stack(common, framesize + 2);
5182 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, TMP1, 0);
5183 }
5184 jump = JUMP(SLJIT_JUMP);
5185 if (bra != OP_BRAZERO)
5186 add_jump(compiler, target, jump);
5187
5188 /* Assert is successful. */
5189 set_jumps(tmp, LABEL());
5190 if (framesize < 0)
5191 {
5192 /* We know that STR_PTR was stored on the top of the stack. */
5193 OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_MEM1(STACK_TOP), 0);
5194 /* Keep the STR_PTR on the top of the stack. */
5195 if (bra == OP_BRAZERO)
5196 OP2(SLJIT_ADD, STACK_TOP, 0, STACK_TOP, 0, SLJIT_IMM, sizeof(sljit_w));
5197 else if (bra == OP_BRAMINZERO)
5198 {
5199 OP2(SLJIT_ADD, STACK_TOP, 0, STACK_TOP, 0, SLJIT_IMM, sizeof(sljit_w));
5200 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), SLJIT_IMM, 0);
5201 }
5202 }
5203 else
5204 {
5205 if (bra == OP_BRA)
5206 {
5207 /* We don't need to keep the STR_PTR, only the previous private_data_ptr. */
5208 OP2(SLJIT_ADD, STACK_TOP, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, SLJIT_IMM, (framesize + 1) * sizeof(sljit_w));
5209 OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_MEM1(STACK_TOP), 0);
5210 }
5211 else
5212 {
5213 /* We don't need to keep the STR_PTR, only the previous private_data_ptr. */
5214 OP2(SLJIT_ADD, STACK_TOP, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, SLJIT_IMM, (framesize + 2) * sizeof(sljit_w));
5215 OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_MEM1(STACK_TOP), STACK(0));
5216 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), bra == OP_BRAZERO ? STR_PTR : SLJIT_IMM, 0);
5217 }
5218 }
5219
5220 if (bra == OP_BRAZERO)
5221 {
5222 backtrack->matchingpath = LABEL();
5223 sljit_set_label(jump, backtrack->matchingpath);
5224 }
5225 else if (bra == OP_BRAMINZERO)
5226 {
5227 JUMPTO(SLJIT_JUMP, backtrack->matchingpath);
5228 JUMPHERE(brajump);
5229 if (framesize >= 0)
5230 {
5231 OP1(SLJIT_MOV, STACK_TOP, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr);
5232 add_jump(compiler, &common->revertframes, JUMP(SLJIT_FAST_CALL));
5233 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, SLJIT_MEM1(STACK_TOP), framesize * sizeof(sljit_w));
5234 }
5235 set_jumps(backtrack->common.topbacktracks, LABEL());
5236 }
5237 }
5238 else
5239 {
5240 /* AssertNot is successful. */
5241 if (framesize < 0)
5242 {
5243 OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_MEM1(STACK_TOP), STACK(0));
5244 if (bra != OP_BRA)
5245 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), SLJIT_IMM, 0);
5246 else
5247 free_stack(common, 1);
5248 }
5249 else
5250 {
5251 OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_MEM1(STACK_TOP), STACK(0));
5252 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(STACK_TOP), STACK(1));
5253 /* The topmost item should be 0. */
5254 if (bra != OP_BRA)
5255 {
5256 free_stack(common, framesize + 1);
5257 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), SLJIT_IMM, 0);
5258 }
5259 else
5260 free_stack(common, framesize + 2);
5261 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, TMP1, 0);
5262 }
5263
5264 if (bra == OP_BRAZERO)
5265 backtrack->matchingpath = LABEL();
5266 else if (bra == OP_BRAMINZERO)
5267 {
5268 JUMPTO(SLJIT_JUMP, backtrack->matchingpath);
5269 JUMPHERE(brajump);
5270 }
5271
5272 if (bra != OP_BRA)
5273 {
5274 SLJIT_ASSERT(found == &backtrack->common.topbacktracks);
5275 set_jumps(backtrack->common.topbacktracks, LABEL());
5276 backtrack->common.topbacktracks = NULL;
5277 }
5278 }
5279
5280 common->quitlabel = save_quitlabel;
5281 common->acceptlabel = save_acceptlabel;
5282 common->quit = save_quit;
5283 common->accept = save_accept;
5284 return cc + 1 + LINK_SIZE;
5285 }
5286
5287 static sljit_w SLJIT_CALL do_searchovector(sljit_w refno, sljit_w* locals, pcre_uchar *name_table)
5288 {
5289 int condition = FALSE;
5290 pcre_uchar *slotA = name_table;
5291 pcre_uchar *slotB;
5292 sljit_w name_count = locals[LOCALS0 / sizeof(sljit_w)];
5293 sljit_w name_entry_size = locals[LOCALS1 / sizeof(sljit_w)];
5294 sljit_w no_capture;
5295 int i;
5296
5297 locals += refno & 0xff;
5298 refno >>= 8;
5299 no_capture = locals[1];
5300
5301 for (i = 0; i < name_count; i++)
5302 {
5303 if (GET2(slotA, 0) == refno) break;
5304 slotA += name_entry_size;
5305 }
5306
5307 if (i < name_count)
5308 {
5309 /* Found a name for the number - there can be only one; duplicate names
5310 for different numbers are allowed, but not vice versa. First scan down
5311 for duplicates. */
5312
5313 slotB = slotA;
5314 while (slotB > name_table)
5315 {
5316 slotB -= name_entry_size;
5317 if (STRCMP_UC_UC(slotA + IMM2_SIZE, slotB + IMM2_SIZE) == 0)
5318 {
5319 condition = locals[GET2(slotB, 0) << 1] != no_capture;
5320 if (condition) break;
5321 }
5322 else break;
5323 }
5324
5325 /* Scan up for duplicates */
5326 if (!condition)
5327 {
5328 slotB = slotA;
5329 for (i++; i < name_count; i++)
5330 {
5331 slotB += name_entry_size;
5332 if (STRCMP_UC_UC(slotA + IMM2_SIZE, slotB + IMM2_SIZE) == 0)
5333 {
5334 condition = locals[GET2(slotB, 0) << 1] != no_capture;
5335 if (condition) break;
5336 }
5337 else break;
5338 }
5339 }
5340 }
5341 return condition;
5342 }
5343
5344 static sljit_w SLJIT_CALL do_searchgroups(sljit_w recno, sljit_w* locals, pcre_uchar *name_table)
5345 {
5346 int condition = FALSE;
5347 pcre_uchar *slotA = name_table;
5348 pcre_uchar *slotB;
5349 sljit_w name_count = locals[LOCALS0 / sizeof(sljit_w)];
5350 sljit_w name_entry_size = locals[LOCALS1 / sizeof(sljit_w)];
5351 sljit_w group_num = locals[POSSESSIVE0 / sizeof(sljit_w)];
5352 int i;
5353
5354 for (i = 0; i < name_count; i++)
5355 {
5356 if (GET2(slotA, 0) == recno) break;
5357 slotA += name_entry_size;
5358 }
5359
5360 if (i < name_count)
5361 {
5362 /* Found a name for the number - there can be only one; duplicate
5363 names for different numbers are allowed, but not vice versa. First
5364 scan down for duplicates. */
5365
5366 slotB = slotA;
5367 while (slotB > name_table)
5368 {
5369 slotB -= name_entry_size;
5370 if (STRCMP_UC_UC(slotA + IMM2_SIZE, slotB + IMM2_SIZE) == 0)
5371 {
5372 condition = GET2(slotB, 0) == group_num;
5373 if (condition) break;
5374 }
5375 else break;
5376 }
5377
5378 /* Scan up for duplicates */
5379 if (!condition)
5380 {
5381 slotB = slotA;
5382 for (i++; i < name_count; i++)
5383 {
5384 slotB += name_entry_size;
5385 if (STRCMP_UC_UC(slotA + IMM2_SIZE, slotB + IMM2_SIZE) == 0)
5386 {
5387 condition = GET2(slotB, 0) == group_num;
5388 if (condition) break;
5389 }
5390 else break;
5391 }
5392 }
5393 }
5394 return condition;
5395 }
5396
5397 /*
5398 Handling bracketed expressions is probably the most complex part.
5399
5400 Stack layout naming characters:
5401 S - Push the current STR_PTR
5402 0 - Push a 0 (NULL)
5403 A - Push the current STR_PTR. Needed for restoring the STR_PTR
5404 before the next alternative. Not pushed if there are no alternatives.
5405 M - Any values pushed by the current alternative. Can be empty, or anything.
5406 C - Push the previous OVECTOR(i), OVECTOR(i+1) and OVECTOR_PRIV(i) to the stack.
5407 L - Push the previous local (pointed by localptr) to the stack
5408 () - opional values stored on the stack
5409 ()* - optonal, can be stored multiple times
5410
5411 The following list shows the regular expression templates, their PCRE byte codes
5412 and stack layout supported by pcre-sljit.
5413
5414 (?:) OP_BRA | OP_KET A M
5415 () OP_CBRA | OP_KET C M
5416 (?:)+ OP_BRA | OP_KETRMAX 0 A M S ( A M S )*
5417 OP_SBRA | OP_KETRMAX 0 L M S ( L M S )*
5418 (?:)+? OP_BRA | OP_KETRMIN 0 A M S ( A M S )*
5419 OP_SBRA | OP_KETRMIN 0 L M S ( L M S )*
5420 ()+ OP_CBRA | OP_KETRMAX 0 C M S ( C M S )*
5421 OP_SCBRA | OP_KETRMAX 0 C M S ( C M S )*
5422 ()+? OP_CBRA | OP_KETRMIN 0 C M S ( C M S )*
5423 OP_SCBRA | OP_KETRMIN 0 C M S ( C M S )*
5424 (?:)? OP_BRAZERO | OP_BRA | OP_KET S ( A M 0 )
5425 (?:)?? OP_BRAMINZERO | OP_BRA | OP_KET S ( A M 0 )
5426 ()? OP_BRAZERO | OP_CBRA | OP_KET S ( C M 0 )
5427 ()?? OP_BRAMINZERO | OP_CBRA | OP_KET S ( C M 0 )
5428 (?:)* OP_BRAZERO | OP_BRA | OP_KETRMAX S 0 ( A M S )*
5429 OP_BRAZERO | OP_SBRA | OP_KETRMAX S 0 ( L M S )*
5430 (?:)*? OP_BRAMINZERO | OP_BRA | OP_KETRMIN S 0 ( A M S )*
5431 OP_BRAMINZERO | OP_SBRA | OP_KETRMIN S 0 ( L M S )*
5432 ()* OP_BRAZERO | OP_CBRA | OP_KETRMAX S 0 ( C M S )*
5433 OP_BRAZERO | OP_SCBRA | OP_KETRMAX S 0 ( C M S )*
5434 ()*? OP_BRAMINZERO | OP_CBRA | OP_KETRMIN S 0 ( C M S )*
5435 OP_BRAMINZERO | OP_SCBRA | OP_KETRMIN S 0 ( C M S )*
5436
5437
5438 Stack layout naming characters:
5439 A - Push the alternative index (starting from 0) on the stack.
5440 Not pushed if there is no alternatives.
5441 M - Any values pushed by the current alternative. Can be empty, or anything.
5442
5443 The next list shows the possible content of a bracket:
5444 (|) OP_*BRA | OP_ALT ... M A
5445 (?()|) OP_*COND | OP_ALT M A
5446 (?>|) OP_ONCE | OP_ALT ... [stack trace] M A
5447 (?>|) OP_ONCE_NC | OP_ALT ... [stack trace] M A
5448 Or nothing, if trace is unnecessary
5449 */
5450
5451 static pcre_uchar *compile_bracket_matchingpath(compiler_common *common, pcre_uchar *cc, backtrack_common *parent)
5452 {
5453 DEFINE_COMPILER;
5454 backtrack_common *backtrack;
5455 pcre_uchar opcode;
5456 int private_data_ptr = 0;
5457 int offset = 0;
5458 int stacksize;
5459 pcre_uchar *ccbegin;
5460 pcre_uchar *matchingpath;
5461 pcre_uchar bra = OP_BRA;
5462 pcre_uchar ket;
5463 assert_backtrack *assert;
5464 BOOL has_alternatives;
5465 struct sljit_jump *jump;
5466 struct sljit_jump *skip;
5467 struct sljit_label *rmaxlabel = NULL;
5468 struct sljit_jump *braminzerojump = NULL;
5469
5470 PUSH_BACKTRACK(sizeof(bracket_backtrack), cc, NULL);
5471
5472 if (*cc == OP_BRAZERO || *cc == OP_BRAMINZERO)
5473 {
5474 bra = *cc;
5475 cc++;
5476 opcode = *cc;
5477 }
5478
5479 opcode = *cc;
5480 ccbegin = cc;
5481 matchingpath = ccbegin + 1 + LINK_SIZE;
5482
5483 if ((opcode == OP_COND || opcode == OP_SCOND) && cc[1 + LINK_SIZE] == OP_DEF)
5484 {
5485 /* Drop this bracket_backtrack. */
5486 parent->top = backtrack->prev;
5487 return bracketend(cc);
5488 }
5489
5490 ket = *(bracketend(cc) - 1 - LINK_SIZE);
5491 SLJIT_ASSERT(ket == OP_KET || ket == OP_KETRMAX || ket == OP_KETRMIN);
5492 SLJIT_ASSERT(!((bra == OP_BRAZERO && ket == OP_KETRMIN) || (bra == OP_BRAMINZERO && ket == OP_KETRMAX)));
5493 cc += GET(cc, 1);
5494
5495 has_alternatives = *cc == OP_ALT;
5496 if (SLJIT_UNLIKELY(opcode == OP_COND) || SLJIT_UNLIKELY(opcode == OP_SCOND))
5497 {
5498 has_alternatives = (*matchingpath == OP_RREF) ? FALSE : TRUE;
5499 if (*matchingpath == OP_NRREF)
5500 {
5501 stacksize = GET2(matchingpath, 1);
5502 if (common->currententry == NULL || stacksize == RREF_ANY)
5503 has_alternatives = FALSE;
5504 else if (common->currententry->start == 0)
5505 has_alternatives = stacksize != 0;
5506 else
5507 has_alternatives = stacksize != GET2(common->start, common->currententry->start + 1 + LINK_SIZE);
5508 }
5509 }
5510
5511 if (SLJIT_UNLIKELY(opcode == OP_COND) && (*cc == OP_KETRMAX || *cc == OP_KETRMIN))
5512 opcode = OP_SCOND;
5513 if (SLJIT_UNLIKELY(opcode == OP_ONCE_NC))
5514 opcode = OP_ONCE;
5515
5516 if (opcode == OP_CBRA || opcode == OP_SCBRA)
5517 {
5518 /* Capturing brackets has a pre-allocated space. */
5519 offset = GET2(ccbegin, 1 + LINK_SIZE);
5520 if (common->optimized_cbracket[offset] == 0)
5521 {
5522 private_data_ptr = OVECTOR_PRIV(offset);
5523 offset <<= 1;
5524 }
5525 else
5526 {
5527 offset <<= 1;
5528 private_data_ptr = OVECTOR(offset);
5529 }
5530 BACKTRACK_AS(bracket_backtrack)->private_data_ptr = private_data_ptr;
5531 matchingpath += IMM2_SIZE;
5532 }
5533 else if (opcode == OP_ONCE || opcode == OP_SBRA || opcode == OP_SCOND)
5534 {
5535 /* Other brackets simply allocate the next entry. */
5536 private_data_ptr = PRIVATE_DATA(ccbegin);
5537 SLJIT_ASSERT(private_data_ptr != 0);
5538 BACKTRACK_AS(bracket_backtrack)->private_data_ptr = private_data_ptr;
5539 if (opcode == OP_ONCE)
5540 BACKTRACK_AS(bracket_backtrack)->u.framesize = get_framesize(common, ccbegin, FALSE);
5541 }
5542
5543 /* Instructions before the first alternative. */
5544 stacksize = 0;
5545 if ((ket == OP_KETRMAX) || (ket == OP_KETRMIN && bra != OP_BRAMINZERO))
5546 stacksize++;
5547 if (bra == OP_BRAZERO)
5548 stacksize++;
5549
5550 if (stacksize > 0)
5551 allocate_stack(common, stacksize);
5552
5553 stacksize = 0;
5554 if ((ket == OP_KETRMAX) || (ket == OP_KETRMIN && bra != OP_BRAMINZERO))
5555 {
5556 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(stacksize), SLJIT_IMM, 0);
5557 stacksize++;
5558 }
5559
5560 if (bra == OP_BRAZERO)
5561 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(stacksize), STR_PTR, 0);
5562
5563 if (bra == OP_BRAMINZERO)
5564 {
5565 /* This is a backtrack path! (Since the try-path of OP_BRAMINZERO matches to the empty string) */
5566 OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_MEM1(STACK_TOP), STACK(0));
5567 if (ket != OP_KETRMIN)
5568 {
5569 free_stack(common, 1);
5570 braminzerojump = CMP(SLJIT_C_EQUAL, STR_PTR, 0, SLJIT_IMM, 0);
5571 }
5572 else
5573 {
5574 if (opcode == OP_ONCE || opcode >= OP_SBRA)
5575 {
5576 jump = CMP(SLJIT_C_NOT_EQUAL, STR_PTR, 0, SLJIT_IMM, 0);
5577 OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_MEM1(STACK_TOP), STACK(1));
5578 /* Nothing stored during the first run. */
5579 skip = JUMP(SLJIT_JUMP);
5580 JUMPHERE(jump);
5581 /* Checking zero-length iteration. */
5582 if (opcode != OP_ONCE || BACKTRACK_AS(bracket_backtrack)->u.framesize < 0)
5583 {
5584 /* When we come from outside, private_data_ptr contains the previous STR_PTR. */
5585 braminzerojump = CMP(SLJIT_C_EQUAL, STR_PTR, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr);
5586 }
5587 else
5588 {
5589 /* Except when the whole stack frame must be saved. */
5590 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr);
5591 braminzerojump = CMP(SLJIT_C_EQUAL, STR_PTR, 0, SLJIT_MEM1(TMP1), (BACKTRACK_AS(bracket_backtrack)->u.framesize + 1) * sizeof(sljit_w));
5592 }
5593 JUMPHERE(skip);
5594 }
5595 else
5596 {
5597 jump = CMP(SLJIT_C_NOT_EQUAL, STR_PTR, 0, SLJIT_IMM, 0);
5598 OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_MEM1(STACK_TOP), STACK(1));
5599 JUMPHERE(jump);
5600 }
5601 }
5602 }
5603
5604 if (ket == OP_KETRMIN)
5605 BACKTRACK_AS(bracket_backtrack)->recursive_matchingpath = LABEL();
5606
5607 if (ket == OP_KETRMAX)
5608 {
5609 rmaxlabel = LABEL();
5610 if (has_alternatives && opcode != OP_ONCE && opcode < OP_SBRA)
5611 BACKTRACK_AS(bracket_backtrack)->alternative_matchingpath = rmaxlabel;
5612 }
5613
5614 /* Handling capturing brackets and alternatives. */
5615 if (opcode == OP_ONCE)
5616 {
5617 if (BACKTRACK_AS(bracket_backtrack)->u.framesize < 0)
5618 {
5619 /* Neither capturing brackets nor recursions are not found in the block. */
5620 if (ket == OP_KETRMIN)
5621 {
5622 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr);
5623 allocate_stack(common, 2);
5624 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), STR_PTR, 0);
5625 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(1), TMP2, 0);
5626 OP2(SLJIT_SUB, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, STACK_TOP, 0, SLJIT_IMM, sizeof(sljit_w));
5627 }
5628 else if (ket == OP_KETRMAX || has_alternatives)
5629 {
5630 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, STACK_TOP, 0);
5631 allocate_stack(common, 1);
5632 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), STR_PTR, 0);
5633 }
5634 else
5635 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, STACK_TOP, 0);
5636 }
5637 else
5638 {
5639 if (ket == OP_KETRMIN || ket == OP_KETRMAX || has_alternatives)
5640 {
5641 allocate_stack(common, BACKTRACK_AS(bracket_backtrack)->u.framesize + 2);
5642 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr);
5643 OP2(SLJIT_SUB, TMP2, 0, STACK_TOP, 0, SLJIT_IMM, -STACK(BACKTRACK_AS(bracket_backtrack)->u.framesize + 1));
5644 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), STR_PTR, 0);
5645 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, TMP2, 0);
5646 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(1), TMP1, 0);
5647 init_frame(common, ccbegin, BACKTRACK_AS(bracket_backtrack)->u.framesize + 1, 2, FALSE);
5648 }
5649 else
5650 {
5651 allocate_stack(common, BACKTRACK_AS(bracket_backtrack)->u.framesize + 1);
5652 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr);
5653 OP2(SLJIT_SUB, TMP2, 0, STACK_TOP, 0, SLJIT_IMM, -STACK(BACKTRACK_AS(bracket_backtrack)->u.framesize));
5654 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, TMP2, 0);
5655 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), TMP1, 0);
5656 init_frame(common, ccbegin, BACKTRACK_AS(bracket_backtrack)->u.framesize, 1, FALSE);
5657 }
5658 }
5659 }
5660 else if (opcode == OP_CBRA || opcode == OP_SCBRA)
5661 {
5662 /* Saving the previous values. */
5663 if (common->optimized_cbracket[offset >> 1] == 0)
5664 {
5665 allocate_stack(common, 3);
5666 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(offset));
5667 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(offset + 1));
5668 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), TMP1, 0);
5669 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr);
5670 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(1), TMP2, 0);
5671 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, STR_PTR, 0);
5672 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(2), TMP1, 0);
5673 }
5674 else
5675 {
5676 SLJIT_ASSERT(private_data_ptr == OVECTOR(offset));
5677 allocate_stack(common, 2);
5678 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr);
5679 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr + sizeof(sljit_w));
5680 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, STR_PTR, 0);
5681 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), TMP1, 0);
5682 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(1), TMP2, 0);
5683 }
5684 }
5685 else if (opcode == OP_SBRA || opcode == OP_SCOND)
5686 {
5687 /* Saving the previous value. */
5688 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr);
5689 allocate_stack(common, 1);
5690 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, STR_PTR, 0);
5691 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), TMP2, 0);
5692 }
5693 else if (has_alternatives)
5694 {
5695 /* Pushing the starting string pointer. */
5696 allocate_stack(common, 1);
5697 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), STR_PTR, 0);
5698 }
5699
5700 /* Generating code for the first alternative. */
5701 if (opcode == OP_COND || opcode == OP_SCOND)
5702 {
5703 if (*matchingpath == OP_CREF)
5704 {
5705 SLJIT_ASSERT(has_alternatives);
5706 add_jump(compiler, &(BACKTRACK_AS(bracket_backtrack)->u.condfailed),
5707 CMP(SLJIT_C_EQUAL, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(GET2(matchingpath, 1) << 1), SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(1)));
5708 matchingpath += 1 + IMM2_SIZE;
5709 }
5710 else if (*matchingpath == OP_NCREF)
5711 {
5712 SLJIT_ASSERT(has_alternatives);
5713 stacksize = GET2(matchingpath, 1);
5714 jump = CMP(SLJIT_C_NOT_EQUAL, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(stacksize << 1), SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(1));
5715
5716 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), POSSESSIVE1, STACK_TOP, 0);
5717 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS0, SLJIT_IMM, common->name_count);
5718 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS1, SLJIT_IMM, common->name_entry_size);
5719 OP1(SLJIT_MOV, SLJIT_TEMPORARY_REG1, 0, SLJIT_IMM, (stacksize << 8) | (common->ovector_start / sizeof(sljit_w)));
5720 GET_LOCAL_BASE(SLJIT_TEMPORARY_REG2, 0, 0);
5721 OP1(SLJIT_MOV, SLJIT_TEMPORARY_REG3, 0, SLJIT_IMM, common->name_table);
5722 sljit_emit_ijump(compiler, SLJIT_CALL3, SLJIT_IMM, SLJIT_FUNC_OFFSET(do_searchovector));
5723 OP1(SLJIT_MOV, STACK_TOP, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), POSSESSIVE1);
5724 add_jump(compiler, &(BACKTRACK_AS(bracket_backtrack)->u.condfailed), CMP(SLJIT_C_EQUAL, SLJIT_TEMPORARY_REG1, 0, SLJIT_IMM, 0));
5725
5726 JUMPHERE(jump);
5727 matchingpath += 1 + IMM2_SIZE;
5728 }
5729 else if (*matchingpath == OP_RREF || *matchingpath == OP_NRREF)
5730 {
5731 /* Never has other case. */
5732 BACKTRACK_AS(bracket_backtrack)->u.condfailed = NULL;
5733
5734 stacksize = GET2(matchingpath, 1);
5735 if (common->currententry == NULL)
5736 stacksize = 0;
5737 else if (stacksize == RREF_ANY)
5738 stacksize = 1;
5739 else if (common->currententry->start == 0)
5740 stacksize = stacksize == 0;
5741 else
5742 stacksize = stacksize == GET2(common->start, common->currententry->start + 1 + LINK_SIZE);
5743
5744 if (*matchingpath == OP_RREF || stacksize || common->currententry == NULL)
5745 {
5746 SLJIT_ASSERT(!has_alternatives);
5747 if (stacksize != 0)
5748 matchingpath += 1 + IMM2_SIZE;
5749 else
5750 {
5751 if (*cc == OP_ALT)
5752 {
5753 matchingpath = cc + 1 + LINK_SIZE;
5754 cc += GET(cc, 1);
5755 }
5756 else
5757 matchingpath = cc;
5758 }
5759 }
5760 else
5761 {
5762 SLJIT_ASSERT(has_alternatives);
5763
5764 stacksize = GET2(matchingpath, 1);
5765 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), POSSESSIVE1, STACK_TOP, 0);
5766 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS0, SLJIT_IMM, common->name_count);
5767 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), LOCALS1, SLJIT_IMM, common->name_entry_size);
5768 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), POSSESSIVE0, SLJIT_IMM, GET2(common->start, common->currententry->start + 1 + LINK_SIZE));
5769 OP1(SLJIT_MOV, SLJIT_TEMPORARY_REG1, 0, SLJIT_IMM, stacksize);
5770 GET_LOCAL_BASE(SLJIT_TEMPORARY_REG2, 0, 0);
5771 OP1(SLJIT_MOV, SLJIT_TEMPORARY_REG3, 0, SLJIT_IMM, common->name_table);
5772 sljit_emit_ijump(compiler, SLJIT_CALL3, SLJIT_IMM, SLJIT_FUNC_OFFSET(do_searchgroups));
5773 OP1(SLJIT_MOV, STACK_TOP, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), POSSESSIVE1);
5774 add_jump(compiler, &(BACKTRACK_AS(bracket_backtrack)->u.condfailed), CMP(SLJIT_C_EQUAL, SLJIT_TEMPORARY_REG1, 0, SLJIT_IMM, 0));
5775 matchingpath += 1 + IMM2_SIZE;
5776 }
5777 }
5778 else
5779 {
5780 SLJIT_ASSERT(has_alternatives && *matchingpath >= OP_ASSERT && *matchingpath <= OP_ASSERTBACK_NOT);
5781 /* Similar code as PUSH_BACKTRACK macro. */
5782 assert = sljit_alloc_memory(compiler, sizeof(assert_backtrack));
5783 if (SLJIT_UNLIKELY(sljit_get_compiler_error(compiler)))
5784 return NULL;
5785 memset(assert, 0, sizeof(assert_backtrack));
5786 assert->common.cc = matchingpath;
5787 BACKTRACK_AS(bracket_backtrack)->u.assert = assert;
5788 matchingpath = compile_assert_matchingpath(common, matchingpath, assert, TRUE);
5789 }
5790 }
5791
5792 compile_matchingpath(common, matchingpath, cc, backtrack);
5793 if (SLJIT_UNLIKELY(sljit_get_compiler_error(compiler)))
5794 return NULL;
5795
5796 if (opcode == OP_ONCE)
5797 {
5798 if (BACKTRACK_AS(bracket_backtrack)->u.framesize < 0)
5799 {
5800 OP1(SLJIT_MOV, STACK_TOP, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr);
5801 /* TMP2 which is set here used by OP_KETRMAX below. */
5802 if (ket == OP_KETRMAX)
5803 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(STACK_TOP), 0);
5804 else if (ket == OP_KETRMIN)
5805 {
5806 /* Move the STR_PTR to the private_data_ptr. */
5807 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, SLJIT_MEM1(STACK_TOP), 0);
5808 }
5809 }
5810 else
5811 {
5812 stacksize = (ket == OP_KETRMIN || ket == OP_KETRMAX || has_alternatives) ? 2 : 1;
5813 OP2(SLJIT_ADD, STACK_TOP, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, SLJIT_IMM, (BACKTRACK_AS(bracket_backtrack)->u.framesize + stacksize) * sizeof(sljit_w));
5814 if (ket == OP_KETRMAX)
5815 {
5816 /* TMP2 which is set here used by OP_KETRMAX below. */
5817 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(STACK_TOP), STACK(0));
5818 }
5819 }
5820 }
5821
5822 stacksize = 0;
5823 if (ket != OP_KET || bra != OP_BRA)
5824 stacksize++;
5825 if (has_alternatives && opcode != OP_ONCE)
5826 stacksize++;
5827
5828 if (stacksize > 0)
5829 allocate_stack(common, stacksize);
5830
5831 stacksize = 0;
5832 if (ket != OP_KET)
5833 {
5834 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(stacksize), STR_PTR, 0);
5835 stacksize++;
5836 }
5837 else if (bra != OP_BRA)
5838 {
5839 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(stacksize), SLJIT_IMM, 0);
5840 stacksize++;
5841 }
5842
5843 if (has_alternatives)
5844 {
5845 if (opcode != OP_ONCE)
5846 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(stacksize), SLJIT_IMM, 0);
5847 if (ket != OP_KETRMAX)
5848 BACKTRACK_AS(bracket_backtrack)->alternative_matchingpath = LABEL();
5849 }
5850
5851 /* Must be after the matchingpath label. */
5852 if (offset != 0)
5853 {
5854 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr);
5855 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(offset + 1), STR_PTR, 0);
5856 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(offset + 0), TMP1, 0);
5857 }
5858
5859 if (ket == OP_KETRMAX)
5860 {
5861 if (opcode == OP_ONCE || opcode >= OP_SBRA)
5862 {
5863 if (has_alternatives)
5864 BACKTRACK_AS(bracket_backtrack)->alternative_matchingpath = LABEL();
5865 /* Checking zero-length iteration. */
5866 if (opcode != OP_ONCE)
5867 {
5868 CMPTO(SLJIT_C_NOT_EQUAL, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, STR_PTR, 0, rmaxlabel);
5869 /* Drop STR_PTR for greedy plus quantifier. */
5870 if (bra != OP_BRAZERO)
5871 free_stack(common, 1);
5872 }
5873 else
5874 /* TMP2 must contain the starting STR_PTR. */
5875 CMPTO(SLJIT_C_NOT_EQUAL, TMP2, 0, STR_PTR, 0, rmaxlabel);
5876 }
5877 else
5878 JUMPTO(SLJIT_JUMP, rmaxlabel);
5879 BACKTRACK_AS(bracket_backtrack)->recursive_matchingpath = LABEL();
5880 }
5881
5882 if (bra == OP_BRAZERO)
5883 BACKTRACK_AS(bracket_backtrack)->zero_matchingpath = LABEL();
5884
5885 if (bra == OP_BRAMINZERO)
5886 {
5887 /* This is a backtrack path! (From the viewpoint of OP_BRAMINZERO) */
5888 JUMPTO(SLJIT_JUMP, ((braminzero_backtrack *)parent)->matchingpath);
5889 if (braminzerojump != NULL)
5890 {
5891 JUMPHERE(braminzerojump);
5892 /* We need to release the end pointer to perform the
5893 backtrack for the zero-length iteration. When
5894 framesize is < 0, OP_ONCE will do the release itself. */
5895 if (opcode == OP_ONCE && BACKTRACK_AS(bracket_backtrack)->u.framesize >= 0)
5896 {
5897 OP1(SLJIT_MOV, STACK_TOP, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr);
5898 add_jump(compiler, &common->revertframes, JUMP(SLJIT_FAST_CALL));
5899 }
5900 else if (ket == OP_KETRMIN && opcode != OP_ONCE)
5901 free_stack(common, 1);
5902 }
5903 /* Continue to the normal backtrack. */
5904 }
5905
5906 if ((ket != OP_KET && bra != OP_BRAMINZERO) || bra == OP_BRAZERO)
5907 decrease_call_count(common);
5908
5909 /* Skip the other alternatives. */
5910 while (*cc == OP_ALT)
5911 cc += GET(cc, 1);
5912 cc += 1 + LINK_SIZE;
5913 return cc;
5914 }
5915
5916 static pcre_uchar *compile_bracketpos_matchingpath(compiler_common *common, pcre_uchar *cc, backtrack_common *parent)
5917 {
5918 DEFINE_COMPILER;
5919 backtrack_common *backtrack;
5920 pcre_uchar opcode;
5921 int private_data_ptr;
5922 int cbraprivptr = 0;
5923 int framesize;
5924 int stacksize;
5925 int offset = 0;
5926 BOOL zero = FALSE;
5927 pcre_uchar *ccbegin = NULL;
5928 int stack;
5929 struct sljit_label *loop = NULL;
5930 struct jump_list *emptymatch = NULL;
5931
5932 PUSH_BACKTRACK(sizeof(bracketpos_backtrack), cc, NULL);
5933 if (*cc == OP_BRAPOSZERO)
5934 {
5935 zero = TRUE;
5936 cc++;
5937 }
5938
5939 opcode = *cc;
5940 private_data_ptr = PRIVATE_DATA(cc);
5941 SLJIT_ASSERT(private_data_ptr != 0);
5942 BACKTRACK_AS(bracketpos_backtrack)->private_data_ptr = private_data_ptr;
5943 switch(opcode)
5944 {
5945 case OP_BRAPOS:
5946 case OP_SBRAPOS:
5947 ccbegin = cc + 1 + LINK_SIZE;
5948 break;
5949
5950 case OP_CBRAPOS:
5951 case OP_SCBRAPOS:
5952 offset = GET2(cc, 1 + LINK_SIZE);
5953 /* This case cannot be optimized in the same was as
5954 normal capturing brackets. */
5955 SLJIT_ASSERT(common->optimized_cbracket[offset] == 0);
5956 cbraprivptr = OVECTOR_PRIV(offset);
5957 offset <<= 1;
5958 ccbegin = cc + 1 + LINK_SIZE + IMM2_SIZE;
5959 break;
5960
5961 default:
5962 SLJIT_ASSERT_STOP();
5963 break;
5964 }
5965
5966 framesize = get_framesize(common, cc, FALSE);
5967 BACKTRACK_AS(bracketpos_backtrack)->framesize = framesize;
5968 if (framesize < 0)
5969 {
5970 stacksize = (opcode == OP_CBRAPOS || opcode == OP_SCBRAPOS) ? 2 : 1;
5971 if (!zero)
5972 stacksize++;
5973 BACKTRACK_AS(bracketpos_backtrack)->stacksize = stacksize;
5974 allocate_stack(common, stacksize);
5975 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, STACK_TOP, 0);
5976
5977 if (opcode == OP_CBRAPOS || opcode == OP_SCBRAPOS)
5978 {
5979 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(offset));
5980 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(offset + 1));
5981 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), TMP1, 0);
5982 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(1), TMP2, 0);
5983 }
5984 else
5985 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), STR_PTR, 0);
5986
5987 if (!zero)
5988 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(stacksize - 1), SLJIT_IMM, 1);
5989 }
5990 else
5991 {
5992 stacksize = framesize + 1;
5993 if (!zero)
5994 stacksize++;
5995 if (opcode == OP_BRAPOS || opcode == OP_SBRAPOS)
5996 stacksize++;
5997 BACKTRACK_AS(bracketpos_backtrack)->stacksize = stacksize;
5998 allocate_stack(common, stacksize);
5999
6000 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr);
6001 OP2(SLJIT_SUB, TMP2, 0, STACK_TOP, 0, SLJIT_IMM, -STACK(stacksize - 1));
6002 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, TMP2, 0);
6003 stack = 0;
6004 if (!zero)
6005 {
6006 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), SLJIT_IMM, 1);
6007 stack++;
6008 }
6009 if (opcode == OP_BRAPOS || opcode == OP_SBRAPOS)
6010 {
6011 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(stack), STR_PTR, 0);
6012 stack++;
6013 }
6014 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(stack), TMP1, 0);
6015 init_frame(common, cc, stacksize - 1, stacksize - framesize, FALSE);
6016 }
6017
6018 if (opcode == OP_CBRAPOS || opcode == OP_SCBRAPOS)
6019 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), cbraprivptr, STR_PTR, 0);
6020
6021 loop = LABEL();
6022 while (*cc != OP_KETRPOS)
6023 {
6024 backtrack->top = NULL;
6025 backtrack->topbacktracks = NULL;
6026 cc += GET(cc, 1);
6027
6028 compile_matchingpath(common, ccbegin, cc, backtrack);
6029 if (SLJIT_UNLIKELY(sljit_get_compiler_error(compiler)))
6030 return NULL;
6031
6032 if (framesize < 0)
6033 {
6034 OP1(SLJIT_MOV, STACK_TOP, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr);
6035
6036 if (opcode == OP_CBRAPOS || opcode == OP_SCBRAPOS)
6037 {
6038 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), cbraprivptr);
6039 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(offset + 1), STR_PTR, 0);
6040 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), cbraprivptr, STR_PTR, 0);
6041 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(offset), TMP1, 0);
6042 }
6043 else
6044 {
6045 if (opcode == OP_SBRAPOS)
6046 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(STACK_TOP), STACK(0));
6047 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), STR_PTR, 0);
6048 }
6049
6050 if (opcode == OP_SBRAPOS || opcode == OP_SCBRAPOS)
6051 add_jump(compiler, &emptymatch, CMP(SLJIT_C_EQUAL, TMP1, 0, STR_PTR, 0));
6052
6053 if (!zero)
6054 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(stacksize - 1), SLJIT_IMM, 0);
6055 }
6056 else
6057 {
6058 if (opcode == OP_CBRAPOS || opcode == OP_SCBRAPOS)
6059 {
6060 OP2(SLJIT_ADD, STACK_TOP, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr, SLJIT_IMM, stacksize * sizeof(sljit_w));
6061 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), cbraprivptr);
6062 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(offset + 1), STR_PTR, 0);
6063 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), cbraprivptr, STR_PTR, 0);
6064 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(offset), TMP1, 0);
6065 }
6066 else
6067 {
6068 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr);
6069 OP2(SLJIT_ADD, STACK_TOP, 0, TMP2, 0, SLJIT_IMM, stacksize * sizeof(sljit_w));
6070 if (opcode == OP_SBRAPOS)
6071 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(TMP2), (framesize + 1) * sizeof(sljit_w));
6072 OP1(SLJIT_MOV, SLJIT_MEM1(TMP2), (framesize + 1) * sizeof(sljit_w), STR_PTR, 0);
6073 }
6074
6075 if (opcode == OP_SBRAPOS || opcode == OP_SCBRAPOS)
6076 add_jump(compiler, &emptymatch, CMP(SLJIT_C_EQUAL, TMP1, 0, STR_PTR, 0));
6077
6078 if (!zero)
6079 {
6080 if (framesize < 0)
6081 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(stacksize - 1), SLJIT_IMM, 0);
6082 else
6083 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), SLJIT_IMM, 0);
6084 }
6085 }
6086 JUMPTO(SLJIT_JUMP, loop);
6087 flush_stubs(common);
6088
6089 compile_backtrackingpath(common, backtrack->top);
6090 if (SLJIT_UNLIKELY(sljit_get_compiler_error(compiler)))
6091 return NULL;
6092 set_jumps(backtrack->topbacktracks, LABEL());
6093
6094 if (framesize < 0)
6095 {
6096 if (opcode == OP_CBRAPOS || opcode == OP_SCBRAPOS)
6097 OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), cbraprivptr);
6098 else
6099 OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_MEM1(STACK_TOP), STACK(0));
6100 }
6101 else
6102 {
6103 if (opcode == OP_CBRAPOS || opcode == OP_SCBRAPOS)
6104 {
6105 /* Last alternative. */
6106 if (*cc == OP_KETRPOS)
6107 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr);
6108 OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), cbraprivptr);
6109 }
6110 else
6111 {
6112 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), private_data_ptr);
6113 OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_MEM1(TMP2), (framesize + 1) * sizeof(sljit_w));
6114 }
6115 }
6116
6117 if (*cc == OP_KETRPOS)
6118 break;
6119 ccbegin = cc + 1 + LINK_SIZE;
6120 }
6121
6122 backtrack->topbacktracks = NULL;
6123 if (!zero)
6124 {
6125 if (framesize < 0)
6126 add_jump(compiler, &backtrack->topbacktracks, CMP(SLJIT_C_NOT_EQUAL, SLJIT_MEM1(STACK_TOP), STACK(stacksize - 1), SLJIT_IMM, 0));
6127 else /* TMP2 is set to [private_data_ptr] above. */
6128 add_jump(compiler, &backtrack->topbacktracks, CMP(SLJIT_C_NOT_EQUAL, SLJIT_MEM1(TMP2), (stacksize - 1) * sizeof(sljit_w), SLJIT_IMM, 0));
6129 }
6130
6131 /* None of them matched. */
6132 set_jumps(emptymatch, LABEL());
6133 decrease_call_count(common);
6134 return cc + 1 + LINK_SIZE;
6135 }
6136
6137 static SLJIT_INLINE pcre_uchar *get_iterator_parameters(compiler_common *common, pcre_uchar *cc, pcre_uchar *opcode, pcre_uchar *type, int *arg1, int *arg2, pcre_uchar **end)
6138 {
6139 int class_len;
6140
6141 *opcode = *cc;
6142 if (*opcode >= OP_STAR && *opcode <= OP_POSUPTO)
6143 {
6144 cc++;
6145 *type = OP_CHAR;
6146 }
6147 else if (*opcode >= OP_STARI && *opcode <= OP_POSUPTOI)
6148 {
6149 cc++;
6150 *type = OP_CHARI;
6151 *opcode -= OP_STARI - OP_STAR;
6152 }
6153 else if (*opcode >= OP_NOTSTAR && *opcode <= OP_NOTPOSUPTO)
6154 {
6155 cc++;
6156 *type = OP_NOT;
6157 *opcode -= OP_NOTSTAR - OP_STAR;
6158 }
6159 else if (*opcode >= OP_NOTSTARI && *opcode <= OP_NOTPOSUPTOI)
6160 {
6161 cc++;
6162 *type = OP_NOTI;
6163 *opcode -= OP_NOTSTARI - OP_STAR;
6164 }
6165 else if (*opcode >= OP_TYPESTAR && *opcode <= OP_TYPEPOSUPTO)
6166 {
6167 cc++;
6168 *opcode -= OP_TYPESTAR - OP_STAR;
6169 *type = 0;
6170 }
6171 else
6172 {
6173 SLJIT_ASSERT(*opcode >= OP_CLASS || *opcode <= OP_XCLASS);
6174 *type = *opcode;
6175 cc++;
6176 class_len = (*type < OP_XCLASS) ? (int)(1 + (32 / sizeof(pcre_uchar))) : GET(cc, 0);
6177 *opcode = cc[class_len - 1];
6178 if (*opcode >= OP_CRSTAR && *opcode <= OP_CRMINQUERY)
6179 {
6180 *opcode -= OP_CRSTAR - OP_STAR;
6181 if (end != NULL)
6182 *end = cc + class_len;
6183 }
6184 else
6185 {
6186 SLJIT_ASSERT(*opcode == OP_CRRANGE || *opcode == OP_CRMINRANGE);
6187 *arg1 = GET2(cc, (class_len + IMM2_SIZE));
6188 *arg2 = GET2(cc, class_len);
6189
6190 if (*arg2 == 0)
6191 {
6192 SLJIT_ASSERT(*arg1 != 0);
6193 *opcode = (*opcode == OP_CRRANGE) ? OP_UPTO : OP_MINUPTO;
6194 }
6195 if (*arg1 == *arg2)
6196 *opcode = OP_EXACT;
6197
6198 if (end != NULL)
6199 *end = cc + class_len + 2 * IMM2_SIZE;
6200 }
6201 return cc;
6202 }
6203
6204 if (*opcode == OP_UPTO || *opcode == OP_MINUPTO || *opcode == OP_EXACT || *opcode == OP_POSUPTO)
6205 {
6206 *arg1 = GET2(cc, 0);
6207 cc += IMM2_SIZE;
6208 }
6209
6210 if (*type == 0)
6211 {
6212 *type = *cc;
6213 if (end != NULL)
6214 *end = next_opcode(common, cc);
6215 cc++;
6216 return cc;
6217 }
6218
6219 if (end != NULL)
6220 {
6221 *end = cc + 1;
6222 #ifdef SUPPORT_UTF
6223 if (common->utf && HAS_EXTRALEN(*cc)) *end += GET_EXTRALEN(*cc);
6224 #endif
6225 }
6226 return cc;
6227 }
6228
6229 static pcre_uchar *compile_iterator_matchingpath(compiler_common *common, pcre_uchar *cc, backtrack_common *parent)
6230 {
6231 DEFINE_COMPILER;
6232 backtrack_common *backtrack;
6233 pcre_uchar opcode;
6234 pcre_uchar type;
6235 int arg1 = -1, arg2 = -1;
6236 pcre_uchar* end;
6237 jump_list *nomatch = NULL;
6238 struct sljit_jump *jump = NULL;
6239 struct sljit_label *label;
6240 int private_data_ptr = PRIVATE_DATA(cc);
6241 int base = (private_data_ptr == 0) ? SLJIT_MEM1(STACK_TOP) : SLJIT_MEM1(SLJIT_LOCALS_REG);
6242 int offset0 = (private_data_ptr == 0) ? STACK(0) : private_data_ptr;
6243 int offset1 = (private_data_ptr == 0) ? STACK(1) : private_data_ptr + (int)sizeof(sljit_w);
6244 int tmp_base, tmp_offset;
6245
6246 PUSH_BACKTRACK(sizeof(iterator_backtrack), cc, NULL);
6247
6248 cc = get_iterator_parameters(common, cc, &opcode, &type, &arg1, &arg2, &end);
6249
6250 switch (type)
6251 {
6252 case OP_NOT_DIGIT:
6253 case OP_DIGIT:
6254 case OP_NOT_WHITESPACE:
6255 case OP_WHITESPACE:
6256 case OP_NOT_WORDCHAR:
6257 case OP_WORDCHAR:
6258 case OP_ANY:
6259 case OP_ALLANY:
6260 case OP_ANYBYTE:
6261 case OP_ANYNL:
6262 case OP_NOT_HSPACE:
6263 case OP_HSPACE:
6264 case OP_NOT_VSPACE:
6265 case OP_VSPACE:
6266 case OP_CHAR:
6267 case OP_CHARI:
6268 case OP_NOT:
6269 case OP_NOTI:
6270 case OP_CLASS:
6271 case OP_NCLASS:
6272 tmp_base = TMP3;
6273 tmp_offset = 0;
6274 break;
6275
6276 default:
6277 SLJIT_ASSERT_STOP();
6278 /* Fall through. */
6279
6280 case OP_EXTUNI:
6281 case OP_XCLASS:
6282 case OP_NOTPROP:
6283 case OP_PROP:
6284 tmp_base = SLJIT_MEM1(SLJIT_LOCALS_REG);
6285 tmp_offset = POSSESSIVE0;
6286 break;
6287 }
6288
6289 switch(opcode)
6290 {
6291 case OP_STAR:
6292 case OP_PLUS:
6293 case OP_UPTO:
6294 case OP_CRRANGE:
6295 if (type == OP_ANYNL || type == OP_EXTUNI)
6296 {
6297 SLJIT_ASSERT(private_data_ptr == 0);
6298 if (opcode == OP_STAR || opcode == OP_UPTO)
6299 {
6300 allocate_stack(common, 2);
6301 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), STR_PTR, 0);
6302 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(1), SLJIT_IMM, 0);
6303 }
6304 else
6305 {
6306 allocate_stack(common, 1);
6307 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), SLJIT_IMM, 0);
6308 }
6309
6310 if (opcode == OP_UPTO || opcode == OP_CRRANGE)
6311 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), POSSESSIVE0, SLJIT_IMM, 0);
6312
6313 label = LABEL();
6314 compile_char1_matchingpath(common, type, cc, &backtrack->topbacktracks);
6315 if (opcode == OP_UPTO || opcode == OP_CRRANGE)
6316 {
6317 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), POSSESSIVE0);
6318 OP2(SLJIT_ADD, TMP1, 0, TMP1, 0, SLJIT_IMM, 1);
6319 if (opcode == OP_CRRANGE && arg2 > 0)
6320 CMPTO(SLJIT_C_LESS, TMP1, 0, SLJIT_IMM, arg2, label);
6321 if (opcode == OP_UPTO || (opcode == OP_CRRANGE && arg1 > 0))
6322 jump = CMP(SLJIT_C_GREATER_EQUAL, TMP1, 0, SLJIT_IMM, arg1);
6323 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), POSSESSIVE0, TMP1, 0);
6324 }
6325
6326 /* We cannot use TMP3 because of this allocate_stack. */
6327 allocate_stack(common, 1);
6328 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), STR_PTR, 0);
6329 JUMPTO(SLJIT_JUMP, label);
6330 if (jump != NULL)
6331 JUMPHERE(jump);
6332 }
6333 else
6334 {
6335 if (opcode == OP_PLUS)
6336 compile_char1_matchingpath(common, type, cc, &backtrack->topbacktracks);
6337 if (private_data_ptr == 0)
6338 allocate_stack(common, 2);
6339 OP1(SLJIT_MOV, base, offset0, STR_PTR, 0);
6340 if (opcode <= OP_PLUS)
6341 OP1(SLJIT_MOV, base, offset1, STR_PTR, 0);
6342 else
6343 OP1(SLJIT_MOV, base, offset1, SLJIT_IMM, 1);
6344 label = LABEL();
6345 compile_char1_matchingpath(common, type, cc, &nomatch);
6346 OP1(SLJIT_MOV, base, offset0, STR_PTR, 0);
6347 if (opcode <= OP_PLUS)
6348 JUMPTO(SLJIT_JUMP, label);
6349 else if (opcode == OP_CRRANGE && arg1 == 0)
6350 {
6351 OP2(SLJIT_ADD, base, offset1, base, offset1, SLJIT_IMM, 1);
6352 JUMPTO(SLJIT_JUMP, label);
6353 }
6354 else
6355 {
6356 OP1(SLJIT_MOV, TMP1, 0, base, offset1);
6357 OP2(SLJIT_ADD, TMP1, 0, TMP1, 0, SLJIT_IMM, 1);
6358 OP1(SLJIT_MOV, base, offset1, TMP1, 0);
6359 CMPTO(SLJIT_C_LESS, TMP1, 0, SLJIT_IMM, arg1 + 1, label);
6360 }
6361 set_jumps(nomatch, LABEL());
6362 if (opcode == OP_CRRANGE)
6363 add_jump(compiler, &backtrack->topbacktracks, CMP(SLJIT_C_LESS, base, offset1, SLJIT_IMM, arg2 + 1));
6364 OP1(SLJIT_MOV, STR_PTR, 0, base, offset0);
6365 }
6366 BACKTRACK_AS(iterator_backtrack)->matchingpath = LABEL();
6367 break;
6368
6369 case OP_MINSTAR:
6370 case OP_MINPLUS:
6371 if (opcode == OP_MINPLUS)
6372 compile_char1_matchingpath(common, type, cc, &backtrack->topbacktracks);
6373 if (private_data_ptr == 0)
6374 allocate_stack(common, 1);
6375 OP1(SLJIT_MOV, base, offset0, STR_PTR, 0);
6376 BACKTRACK_AS(iterator_backtrack)->matchingpath = LABEL();
6377 break;
6378
6379 case OP_MINUPTO:
6380 case OP_CRMINRANGE:
6381 if (private_data_ptr == 0)
6382 allocate_stack(common, 2);
6383 OP1(SLJIT_MOV, base, offset0, STR_PTR, 0);
6384 OP1(SLJIT_MOV, base, offset1, SLJIT_IMM, 1);
6385 if (opcode == OP_CRMINRANGE)
6386 add_jump(compiler, &backtrack->topbacktracks, JUMP(SLJIT_JUMP));
6387 BACKTRACK_AS(iterator_backtrack)->matchingpath = LABEL();
6388 break;
6389
6390 case OP_QUERY:
6391 case OP_MINQUERY:
6392 if (private_data_ptr == 0)
6393 allocate_stack(common, 1);
6394 OP1(SLJIT_MOV, base, offset0, STR_PTR, 0);
6395 if (opcode == OP_QUERY)
6396 compile_char1_matchingpath(common, type, cc, &backtrack->topbacktracks);
6397 BACKTRACK_AS(iterator_backtrack)->matchingpath = LABEL();
6398 break;
6399
6400 case OP_EXACT:
6401 OP1(SLJIT_MOV, tmp_base, tmp_offset, SLJIT_IMM, arg1);
6402 label = LABEL();
6403 compile_char1_matchingpath(common, type, cc, &backtrack->topbacktracks);
6404 OP2(SLJIT_SUB | SLJIT_SET_E, tmp_base, tmp_offset, tmp_base, tmp_offset, SLJIT_IMM, 1);
6405 JUMPTO(SLJIT_C_NOT_ZERO, label);
6406 break;
6407
6408 case OP_POSSTAR:
6409 case OP_POSPLUS:
6410 case OP_POSUPTO:
6411 if (opcode == OP_POSPLUS)
6412 compile_char1_matchingpath(common, type, cc, &backtrack->topbacktracks);
6413 if (opcode == OP_POSUPTO)
6414 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), POSSESSIVE1, SLJIT_IMM, arg1);
6415 OP1(SLJIT_MOV, tmp_base, tmp_offset, STR_PTR, 0);
6416 label = LABEL();
6417 compile_char1_matchingpath(common, type, cc, &nomatch);
6418 OP1(SLJIT_MOV, tmp_base, tmp_offset, STR_PTR, 0);
6419 if (opcode != OP_POSUPTO)
6420 JUMPTO(SLJIT_JUMP, label);
6421 else
6422 {
6423 OP2(SLJIT_SUB | SLJIT_SET_E, SLJIT_MEM1(SLJIT_LOCALS_REG), POSSESSIVE1, SLJIT_MEM1(SLJIT_LOCALS_REG), POSSESSIVE1, SLJIT_IMM, 1);
6424 JUMPTO(SLJIT_C_NOT_ZERO, label);
6425 }
6426 set_jumps(nomatch, LABEL());
6427 OP1(SLJIT_MOV, STR_PTR, 0, tmp_base, tmp_offset);
6428 break;
6429
6430 case OP_POSQUERY:
6431 OP1(SLJIT_MOV, tmp_base, tmp_offset, STR_PTR, 0);
6432 compile_char1_matchingpath(common, type, cc, &nomatch);
6433 OP1(SLJIT_MOV, tmp_base, tmp_offset, STR_PTR, 0);
6434 set_jumps(nomatch, LABEL());
6435 OP1(SLJIT_MOV, STR_PTR, 0, tmp_base, tmp_offset);
6436 break;
6437
6438 default:
6439 SLJIT_ASSERT_STOP();
6440 break;
6441 }
6442
6443 decrease_call_count(common);
6444 return end;
6445 }
6446
6447 static SLJIT_INLINE pcre_uchar *compile_fail_accept_matchingpath(compiler_common *common, pcre_uchar *cc, backtrack_common *parent)
6448 {
6449 DEFINE_COMPILER;
6450 backtrack_common *backtrack;
6451
6452 PUSH_BACKTRACK(sizeof(bracket_backtrack), cc, NULL);
6453
6454 if (*cc == OP_FAIL)
6455 {
6456 add_jump(compiler, &backtrack->topbacktracks, JUMP(SLJIT_JUMP));
6457 return cc + 1;
6458 }
6459
6460 if (*cc == OP_ASSERT_ACCEPT || common->currententry != NULL)
6461 {
6462 /* No need to check notempty conditions. */
6463 if (common->acceptlabel == NULL)
6464 add_jump(compiler, &common->accept, JUMP(SLJIT_JUMP));
6465 else
6466 JUMPTO(SLJIT_JUMP, common->acceptlabel);
6467 return cc + 1;
6468 }
6469
6470 if (common->acceptlabel == NULL)
6471 add_jump(compiler, &common->accept, CMP(SLJIT_C_NOT_EQUAL, STR_PTR, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(0)));
6472 else
6473 CMPTO(SLJIT_C_NOT_EQUAL, STR_PTR, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(0), common->acceptlabel);
6474 OP1(SLJIT_MOV, TMP1, 0, ARGUMENTS, 0);
6475 OP1(SLJIT_MOV_UB, TMP2, 0, SLJIT_MEM1(TMP1), SLJIT_OFFSETOF(jit_arguments, notempty));
6476 add_jump(compiler, &backtrack->topbacktracks, CMP(SLJIT_C_NOT_EQUAL, TMP2, 0, SLJIT_IMM, 0));
6477 OP1(SLJIT_MOV_UB, TMP2, 0, SLJIT_MEM1(TMP1), SLJIT_OFFSETOF(jit_arguments, notempty_atstart));
6478 if (common->acceptlabel == NULL)
6479 add_jump(compiler, &common->accept, CMP(SLJIT_C_EQUAL, TMP2, 0, SLJIT_IMM, 0));
6480 else
6481 CMPTO(SLJIT_C_EQUAL, TMP2, 0, SLJIT_IMM, 0, common->acceptlabel);
6482 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(TMP1), SLJIT_OFFSETOF(jit_arguments, str));
6483 if (common->acceptlabel == NULL)
6484 add_jump(compiler, &common->accept, CMP(SLJIT_C_NOT_EQUAL, TMP2, 0, STR_PTR, 0));
6485 else
6486 CMPTO(SLJIT_C_NOT_EQUAL, TMP2, 0, STR_PTR, 0, common->acceptlabel);
6487 add_jump(compiler, &backtrack->topbacktracks, JUMP(SLJIT_JUMP));
6488 return cc + 1;
6489 }
6490
6491 static SLJIT_INLINE pcre_uchar *compile_close_matchingpath(compiler_common *common, pcre_uchar *cc)
6492 {
6493 DEFINE_COMPILER;
6494 int offset = GET2(cc, 1);
6495 BOOL optimized_cbracket = common->optimized_cbracket[offset] != 0;
6496
6497 /* Data will be discarded anyway... */
6498 if (common->currententry != NULL)
6499 return cc + 1 + IMM2_SIZE;
6500
6501 if (!optimized_cbracket)
6502 OP1(SLJIT_MOV, TMP1, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR_PRIV(offset));
6503 offset <<= 1;
6504 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(offset + 1), STR_PTR, 0);
6505 if (!optimized_cbracket)
6506 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(offset), TMP1, 0);
6507 return cc + 1 + IMM2_SIZE;
6508 }
6509
6510 static void compile_matchingpath(compiler_common *common, pcre_uchar *cc, pcre_uchar *ccend, backtrack_common *parent)
6511 {
6512 DEFINE_COMPILER;
6513 backtrack_common *backtrack;
6514
6515 while (cc < ccend)
6516 {
6517 switch(*cc)
6518 {
6519 case OP_SOD:
6520 case OP_SOM:
6521 case OP_NOT_WORD_BOUNDARY:
6522 case OP_WORD_BOUNDARY:
6523 case OP_NOT_DIGIT:
6524 case OP_DIGIT:
6525 case OP_NOT_WHITESPACE:
6526 case OP_WHITESPACE:
6527 case OP_NOT_WORDCHAR:
6528 case OP_WORDCHAR:
6529 case OP_ANY:
6530 case OP_ALLANY:
6531 case OP_ANYBYTE:
6532 case OP_NOTPROP:
6533 case OP_PROP:
6534 case OP_ANYNL:
6535 case OP_NOT_HSPACE:
6536 case OP_HSPACE:
6537 case OP_NOT_VSPACE:
6538 case OP_VSPACE:
6539 case OP_EXTUNI:
6540 case OP_EODN:
6541 case OP_EOD:
6542 case OP_CIRC:
6543 case OP_CIRCM:
6544 case OP_DOLL:
6545 case OP_DOLLM:
6546 case OP_NOT:
6547 case OP_NOTI:
6548 case OP_REVERSE:
6549 cc = compile_char1_matchingpath(common, *cc, cc + 1, parent->top != NULL ? &parent->top->nextbacktracks : &parent->topbacktracks);
6550 break;
6551
6552 case OP_SET_SOM:
6553 PUSH_BACKTRACK_NOVALUE(sizeof(backtrack_common), cc);
6554 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(0));
6555 allocate_stack(common, 1);
6556 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), OVECTOR(0), STR_PTR, 0);
6557 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), TMP2, 0);
6558 cc++;
6559 break;
6560
6561 case OP_CHAR:
6562 case OP_CHARI:
6563 if (common->mode == JIT_COMPILE)
6564 cc = compile_charn_matchingpath(common, cc, ccend, parent->top != NULL ? &parent->top->nextbacktracks : &parent->topbacktracks);
6565 else
6566 cc = compile_char1_matchingpath(common, *cc, cc + 1, parent->top != NULL ? &parent->top->nextbacktracks : &parent->topbacktracks);
6567 break;
6568
6569 case OP_STAR:
6570 case OP_MINSTAR:
6571 case OP_PLUS:
6572 case OP_MINPLUS:
6573 case OP_QUERY:
6574 case OP_MINQUERY:
6575 case OP_UPTO:
6576 case OP_MINUPTO:
6577 case OP_EXACT:
6578 case OP_POSSTAR:
6579 case OP_POSPLUS:
6580 case OP_POSQUERY:
6581 case OP_POSUPTO:
6582 case OP_STARI:
6583 case OP_MINSTARI:
6584 case OP_PLUSI:
6585 case OP_MINPLUSI:
6586 case OP_QUERYI:
6587 case OP_MINQUERYI:
6588 case OP_UPTOI:
6589 case OP_MINUPTOI:
6590 case OP_EXACTI:
6591 case OP_POSSTARI:
6592 case OP_POSPLUSI:
6593 case OP_POSQUERYI:
6594 case OP_POSUPTOI:
6595 case OP_NOTSTAR:
6596 case OP_NOTMINSTAR:
6597 case OP_NOTPLUS:
6598 case OP_NOTMINPLUS:
6599 case OP_NOTQUERY:
6600 case OP_NOTMINQUERY:
6601 case OP_NOTUPTO:
6602 case OP_NOTMINUPTO:
6603 case OP_NOTEXACT:
6604 case OP_NOTPOSSTAR:
6605 case OP_NOTPOSPLUS:
6606 case OP_NOTPOSQUERY:
6607 case OP_NOTPOSUPTO:
6608 case OP_NOTSTARI:
6609 case OP_NOTMINSTARI:
6610 case OP_NOTPLUSI:
6611 case OP_NOTMINPLUSI:
6612 case OP_NOTQUERYI:
6613 case OP_NOTMINQUERYI:
6614 case OP_NOTUPTOI:
6615 case OP_NOTMINUPTOI:
6616 case OP_NOTEXACTI:
6617 case OP_NOTPOSSTARI:
6618 case OP_NOTPOSPLUSI:
6619 case OP_NOTPOSQUERYI:
6620 case OP_NOTPOSUPTOI:
6621 case OP_TYPESTAR:
6622 case OP_TYPEMINSTAR:
6623 case OP_TYPEPLUS:
6624 case OP_TYPEMINPLUS:
6625 case OP_TYPEQUERY:
6626 case OP_TYPEMINQUERY:
6627 case OP_TYPEUPTO:
6628 case OP_TYPEMINUPTO:
6629 case OP_TYPEEXACT:
6630 case OP_TYPEPOSSTAR:
6631 case OP_TYPEPOSPLUS:
6632 case OP_TYPEPOSQUERY:
6633 case OP_TYPEPOSUPTO:
6634 cc = compile_iterator_matchingpath(common, cc, parent);
6635 break;
6636
6637 case OP_CLASS:
6638 case OP_NCLASS:
6639 if (cc[1 + (32 / sizeof(pcre_uchar))] >= OP_CRSTAR && cc[1 + (32 / sizeof(pcre_uchar))] <= OP_CRMINRANGE)
6640 cc = compile_iterator_matchingpath(common, cc, parent);
6641 else
6642 cc = compile_char1_matchingpath(common, *cc, cc + 1, parent->top != NULL ? &parent->top->nextbacktracks : &parent->topbacktracks);
6643 break;
6644
6645 #if defined SUPPORT_UTF || defined COMPILE_PCRE16
6646 case OP_XCLASS:
6647 if (*(cc + GET(cc, 1)) >= OP_CRSTAR && *(cc + GET(cc, 1)) <= OP_CRMINRANGE)
6648 cc = compile_iterator_matchingpath(common, cc, parent);
6649 else
6650 cc = compile_char1_matchingpath(common, *cc, cc + 1, parent->top != NULL ? &parent->top->nextbacktracks : &parent->topbacktracks);
6651 break;
6652 #endif
6653
6654 case OP_REF:
6655 case OP_REFI:
6656 if (cc[1 + IMM2_SIZE] >= OP_CRSTAR && cc[1 + IMM2_SIZE] <= OP_CRMINRANGE)
6657 cc = compile_ref_iterator_matchingpath(common, cc, parent);
6658 else
6659 cc = compile_ref_matchingpath(common, cc, parent->top != NULL ? &parent->top->nextbacktracks : &parent->topbacktracks, TRUE, FALSE);
6660 break;
6661
6662 case OP_RECURSE:
6663 cc = compile_recurse_matchingpath(common, cc, parent);
6664 break;
6665
6666 case OP_ASSERT:
6667 case OP_ASSERT_NOT:
6668 case OP_ASSERTBACK:
6669 case OP_ASSERTBACK_NOT:
6670 PUSH_BACKTRACK_NOVALUE(sizeof(assert_backtrack), cc);
6671 cc = compile_assert_matchingpath(common, cc, BACKTRACK_AS(assert_backtrack), FALSE);
6672 break;
6673
6674 case OP_BRAMINZERO:
6675 PUSH_BACKTRACK_NOVALUE(sizeof(braminzero_backtrack), cc);
6676 cc = bracketend(cc + 1);
6677 if (*(cc - 1 - LINK_SIZE) != OP_KETRMIN)
6678 {
6679 allocate_stack(common, 1);
6680 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), STR_PTR, 0);
6681 }
6682 else
6683 {
6684 allocate_stack(common, 2);
6685 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), SLJIT_IMM, 0);
6686 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(1), STR_PTR, 0);
6687 }
6688 BACKTRACK_AS(braminzero_backtrack)->matchingpath = LABEL();
6689 if (cc[1] > OP_ASSERTBACK_NOT)
6690 decrease_call_count(common);
6691 break;
6692
6693 case OP_ONCE:
6694 case OP_ONCE_NC:
6695 case OP_BRA:
6696 case OP_CBRA:
6697 case OP_COND:
6698 case OP_SBRA:
6699 case OP_SCBRA:
6700 case OP_SCOND:
6701 cc = compile_bracket_matchingpath(common, cc, parent);
6702 break;
6703
6704 case OP_BRAZERO:
6705 if (cc[1] > OP_ASSERTBACK_NOT)
6706 cc = compile_bracket_matchingpath(common, cc, parent);
6707 else
6708 {
6709 PUSH_BACKTRACK_NOVALUE(sizeof(assert_backtrack), cc);
6710 cc = compile_assert_matchingpath(common, cc, BACKTRACK_AS(assert_backtrack), FALSE);
6711 }
6712 break;
6713
6714 case OP_BRAPOS:
6715 case OP_CBRAPOS:
6716 case OP_SBRAPOS:
6717 case OP_SCBRAPOS:
6718 case OP_BRAPOSZERO:
6719 cc = compile_bracketpos_matchingpath(common, cc, parent);
6720 break;
6721
6722 case OP_MARK:
6723 PUSH_BACKTRACK_NOVALUE(sizeof(backtrack_common), cc);
6724 SLJIT_ASSERT(common->mark_ptr != 0);
6725 OP1(SLJIT_MOV, TMP2, 0, SLJIT_MEM1(SLJIT_LOCALS_REG), common->mark_ptr);
6726 allocate_stack(common, 1);
6727 OP1(SLJIT_MOV, TMP1, 0, ARGUMENTS, 0);
6728 OP1(SLJIT_MOV, SLJIT_MEM1(STACK_TOP), STACK(0), TMP2, 0);
6729 OP1(SLJIT_MOV, TMP2, 0, SLJIT_IMM, (sljit_w)(cc + 2));
6730 OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_LOCALS_REG), common->mark_ptr, TMP2, 0);
6731 OP1(SLJIT_MOV, SLJIT_MEM1(TMP1), SLJIT_OFFSETOF(jit_arguments, mark_ptr), TMP2, 0);
6732 cc += 1 + 2 + cc[1];
6733 break;
6734
6735 case OP_COMMIT:
6736 PUSH_BACKTRACK_NOVALUE(sizeof(backtrack_common), cc);
6737 cc += 1;
6738 break;
6739
6740 case OP_FAIL:
6741 case OP_ACCEPT:
6742 case OP_ASSERT_ACCEPT:
6743 cc = compile_fail_accept_matchingpath(common, cc, parent);
6744 break;
6745
6746 case OP_CLOSE:
6747 cc = compile_close_matchingpath(common, cc);
6748 break;
6749
6750 case OP_SKIPZERO:
6751 cc = bracketend(cc + 1);
6752 break;
6753
6754 default:
6755 SLJIT_ASSERT_STOP();
6756 return;
6757 }
6758 if (cc == NULL)
6759 return;
6760 }
6761 SLJIT_ASSERT(cc == ccend);
6762 }
6763
6764 #undef PUSH_BACKTRACK
6765 #undef PUSH_BACKTRACK_NOVALUE
6766 #undef BACKTRACK_AS
6767
6768 #define COMPILE_BACKTRACKINGPATH(current) \
6769 do \
6770 { \
6771 compile_backtrackingpath(common, (current)); \
6772 if (SLJIT_UNLIKELY(sljit_get_compiler_error(compiler))) \
6773 return; \
6774 } \
6775 while (0)
6776
6777 #define CURRENT_AS(type) ((type *)current)
6778
6779 static void compile_iterator_backtrackingpath(compiler_common *common, struct backtrack_common *current)
6780 {