forked from godotengine/godot
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathregex.cpp
1507 lines (1171 loc) · 32.5 KB
/
regex.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*************************************************************************/
/* regex.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "regex.h"
#include <wchar.h>
#include <wctype.h>
static int RegEx_hex2int(const CharType c) {
if ('0' <= c && c <= '9')
return int(c - '0');
else if ('a' <= c && c <= 'f')
return int(c - 'a') + 10;
else if ('A' <= c && c <= 'F')
return int(c - 'A') + 10;
return -1;
}
struct RegExSearch {
Ref<RegExMatch> match;
const CharType *str;
int end;
int eof;
// For standard quantifier behaviour, test_parent is used to check the
// rest of the pattern. If the pattern matches, to prevent the parent
// from testing again, the complete flag is used as a shortcut out.
bool complete;
// With lookahead, the position needs to rewind to its starting position
// when test_parent is used. Due to functional programming, this state
// has to be kept as a parameter.
Vector<int> lookahead_pos;
CharType at(int p_pos) {
return str[p_pos];
}
RegExSearch(Ref<RegExMatch> &p_match, int p_end, int p_lookahead)
: match(p_match) {
str = p_match->string.c_str();
end = p_end;
eof = p_match->string.length();
complete = false;
lookahead_pos.resize(p_lookahead);
}
};
struct RegExNode {
RegExNode *next;
RegExNode *previous;
RegExNode *parent;
bool quantifiable;
int length;
RegExNode() {
next = NULL;
previous = NULL;
parent = NULL;
quantifiable = false;
length = -1;
}
virtual ~RegExNode() {
if (next)
memdelete(next);
}
// For avoiding RTTI
virtual bool is_look_behind() { return false; }
virtual int test(RegExSearch &s, int pos) const {
return next ? next->test(s, pos) : -1;
}
virtual int test_parent(RegExSearch &s, int pos) const {
if (next)
pos = next->test(s, pos);
if (pos >= 0) {
s.complete = true;
if (parent)
pos = parent->test_parent(s, pos);
}
if (pos < 0)
s.complete = false;
return pos;
}
void increment_length(int amount, bool subtract = false) {
if (amount >= 0 && length >= 0) {
if (!subtract)
length += amount;
else
length -= amount;
} else {
length = -1;
}
if (parent)
parent->increment_length(amount, subtract);
}
};
struct RegExNodeChar : public RegExNode {
CharType ch;
RegExNodeChar(CharType p_char) {
length = 1;
quantifiable = true;
ch = p_char;
}
virtual int test(RegExSearch &s, int pos) const {
if (s.end <= pos || 0 > pos || s.at(pos) != ch)
return -1;
return next ? next->test(s, pos + 1) : pos + 1;
}
static CharType parse_escape(const CharType *&c) {
int point = 0;
switch (c[1]) {
case 'x':
for (int i = 2; i <= 3; ++i) {
int res = RegEx_hex2int(c[i]);
if (res == -1)
return '\0';
point = (point << 4) + res;
}
c = &c[3];
return CharType(point);
case 'u':
for (int i = 2; i <= 5; ++i) {
int res = RegEx_hex2int(c[i]);
if (res == -1)
return '\0';
point = (point << 4) + res;
}
c = &c[5];
return CharType(point);
case '0': ++c; return '\0';
case 'a': ++c; return '\a';
case 'e': ++c; return '\e';
case 'f': ++c; return '\f';
case 'n': ++c; return '\n';
case 'r': ++c; return '\r';
case 't': ++c; return '\t';
case 'v': ++c; return '\v';
case 'b': ++c; return '\b';
default: break;
}
return (++c)[0];
}
};
struct RegExNodeRange : public RegExNode {
CharType start;
CharType end;
RegExNodeRange(CharType p_start, CharType p_end) {
length = 1;
quantifiable = true;
start = p_start;
end = p_end;
}
virtual int test(RegExSearch &s, int pos) const {
if (s.end <= pos || 0 > pos)
return -1;
CharType c = s.at(pos);
if (c < start || end < c)
return -1;
return next ? next->test(s, pos + 1) : pos + 1;
}
};
struct RegExNodeShorthand : public RegExNode {
CharType repr;
RegExNodeShorthand(CharType p_repr) {
length = 1;
quantifiable = true;
repr = p_repr;
}
virtual int test(RegExSearch &s, int pos) const {
if (s.end <= pos || 0 > pos)
return -1;
bool found = false;
bool invert = false;
CharType c = s.at(pos);
switch (repr) {
case '.':
found = true;
break;
case 'W':
invert = true;
case 'w':
found = (c == '_' || iswalnum(c) != 0);
break;
case 'D':
invert = true;
case 'd':
found = ('0' <= c && c <= '9');
break;
case 'S':
invert = true;
case 's':
found = (iswspace(c) != 0);
break;
default:
break;
}
if (found == invert)
return -1;
return next ? next->test(s, pos + 1) : pos + 1;
}
};
struct RegExNodeClass : public RegExNode {
enum Type {
Type_none,
Type_alnum,
Type_alpha,
Type_ascii,
Type_blank,
Type_cntrl,
Type_digit,
Type_graph,
Type_lower,
Type_print,
Type_punct,
Type_space,
Type_upper,
Type_xdigit,
Type_word
};
Type type;
bool test_class(CharType c) const {
static Vector<CharType> REGEX_NODE_SPACE = String(" \t\r\n\f");
static Vector<CharType> REGEX_NODE_PUNCT = String("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~");
switch (type) {
case Type_alnum:
if ('0' <= c && c <= '9') return true;
if ('a' <= c && c <= 'z') return true;
if ('A' <= c && c <= 'Z') return true;
return false;
case Type_alpha:
if ('a' <= c && c <= 'z') return true;
if ('A' <= c && c <= 'Z') return true;
return false;
case Type_ascii:
return (0x00 <= c && c <= 0x7F);
case Type_blank:
return (c == ' ' || c == '\t');
case Type_cntrl:
return ((0x00 <= c && c <= 0x1F) || c == 0x7F);
case Type_digit:
return ('0' <= c && c <= '9');
case Type_graph:
return (0x20 < c && c < 0x7F);
case Type_lower:
return ('a' <= c && c <= 'z');
case Type_print:
return (0x20 < c && c < 0x7f);
case Type_punct:
return (REGEX_NODE_PUNCT.find(c) >= 0);
case Type_space:
return (REGEX_NODE_SPACE.find(c) >= 0);
case Type_upper:
return ('A' <= c && c <= 'Z');
case Type_xdigit:
if ('0' <= c && c <= '9') return true;
if ('a' <= c && c <= 'f') return true;
if ('A' <= c && c <= 'F') return true;
return false;
case Type_word:
if ('0' <= c && c <= '9') return true;
if ('a' <= c && c <= 'z') return true;
if ('A' <= c && c <= 'Z') return true;
return (c == '_');
default:
return false;
}
return false;
}
RegExNodeClass(Type p_type) {
length = 1;
quantifiable = true;
type = p_type;
}
virtual int test(RegExSearch &s, int pos) const {
if (s.end <= pos || 0 > pos)
return -1;
if (!test_class(s.at(pos)))
return -1;
return next ? next->test(s, pos + 1) : pos + 1;
}
#define REGEX_CMP_CLASS(POS, NAME) \
if (cmp_class(POS, #NAME)) return Type_##NAME
static Type parse_type(const CharType *&p_pos) {
REGEX_CMP_CLASS(p_pos, alnum);
REGEX_CMP_CLASS(p_pos, alpha);
REGEX_CMP_CLASS(p_pos, ascii);
REGEX_CMP_CLASS(p_pos, blank);
REGEX_CMP_CLASS(p_pos, cntrl);
REGEX_CMP_CLASS(p_pos, digit);
REGEX_CMP_CLASS(p_pos, graph);
REGEX_CMP_CLASS(p_pos, lower);
REGEX_CMP_CLASS(p_pos, print);
REGEX_CMP_CLASS(p_pos, punct);
REGEX_CMP_CLASS(p_pos, space);
REGEX_CMP_CLASS(p_pos, upper);
REGEX_CMP_CLASS(p_pos, xdigit);
REGEX_CMP_CLASS(p_pos, word);
return Type_none;
}
static bool cmp_class(const CharType *&p_pos, const char *p_text) {
unsigned int i = 0;
for (i = 0; p_text[i] != '\0'; ++i)
if (p_pos[i] != p_text[i])
return false;
if (p_pos[i++] != ':' || p_pos[i] != ']')
return false;
p_pos = &p_pos[i];
return true;
}
};
struct RegExNodeAnchorStart : public RegExNode {
RegExNodeAnchorStart() {
length = 0;
}
virtual int test(RegExSearch &s, int pos) const {
if (pos != 0)
return -1;
return next ? next->test(s, pos) : pos;
}
};
struct RegExNodeAnchorEnd : public RegExNode {
RegExNodeAnchorEnd() {
length = 0;
}
virtual int test(RegExSearch &s, int pos) const {
if (pos != s.eof)
return -1;
return next ? next->test(s, pos) : pos;
}
};
struct RegExNodeWordBoundary : public RegExNode {
bool inverse;
RegExNodeWordBoundary(bool p_inverse) {
length = 0;
inverse = p_inverse;
}
virtual int test(RegExSearch &s, int pos) const {
bool left = false;
bool right = false;
if (pos != 0) {
CharType c = s.at(pos - 1);
if (c == '_' || iswalnum(c))
left = true;
}
if (pos != s.eof) {
CharType c = s.at(pos);
if (c == '_' || iswalnum(c))
right = true;
}
if ((left == right) != inverse)
return -1;
return next ? next->test(s, pos) : pos;
}
};
struct RegExNodeQuantifier : public RegExNode {
int min;
int max;
bool greedy;
RegExNode *child;
RegExNodeQuantifier(int p_min, int p_max) {
min = p_min;
max = p_max;
greedy = true;
child = NULL;
}
~RegExNodeQuantifier() {
if (child)
memdelete(child);
}
virtual int test(RegExSearch &s, int pos) const {
return test_step(s, pos, 0, pos);
}
virtual int test_parent(RegExSearch &s, int pos) const {
s.complete = false;
return pos;
}
int test_step(RegExSearch &s, int pos, int level, int start) const {
if (pos > s.end)
return -1;
if (!greedy && level > min) {
int res = next ? next->test(s, pos) : pos;
if (s.complete)
return res;
if (res >= 0 && parent->test_parent(s, res) >= 0)
return res;
}
if (max >= 0 && level > max)
return -1;
int res = pos;
if (level >= 1) {
if (level > min + 1 && pos == start)
return -1;
res = child->test(s, pos);
if (s.complete)
return res;
}
if (res >= 0) {
int res_step = test_step(s, res, level + 1, start);
if (res_step >= 0)
return res_step;
if (greedy && level >= min) {
if (next)
res = next->test(s, res);
if (s.complete)
return res;
if (res >= 0 && parent->test_parent(s, res) >= 0)
return res;
}
}
return -1;
}
};
struct RegExNodeBackReference : public RegExNode {
int id;
RegExNodeBackReference(int p_id) {
length = -1;
quantifiable = true;
id = p_id;
}
virtual int test(RegExSearch &s, int pos) const {
RegExMatch::Group &ref = s.match->captures[id];
for (int i = 0; i < ref.length; ++i) {
if (pos + i >= s.end)
return -1;
if (s.at(ref.start + i) != s.at(pos + i))
return -1;
}
return next ? next->test(s, pos + ref.length) : pos + ref.length;
}
};
struct RegExNodeGroup : public RegExNode {
bool inverse;
bool reset_pos;
Vector<RegExNode *> childset;
RegExNode *back;
RegExNodeGroup() {
length = 0;
quantifiable = true;
inverse = false;
reset_pos = false;
back = NULL;
}
virtual ~RegExNodeGroup() {
for (int i = 0; i < childset.size(); ++i)
memdelete(childset[i]);
}
virtual void test_success(RegExSearch &s, int pos) const {
return;
}
virtual int test(RegExSearch &s, int pos) const {
for (int i = 0; i < childset.size(); ++i) {
s.complete = false;
int res = childset[i]->test(s, pos);
if (inverse) {
s.complete = false;
if (res < 0)
res = pos + 1;
else
return -1;
if (i + 1 < childset.size())
continue;
}
if (s.complete)
return res;
if (res >= 0) {
if (reset_pos)
res = pos;
this->test_success(s, res);
return next ? next->test(s, res) : res;
}
}
return -1;
}
void add_child(RegExNode *node) {
node->parent = this;
node->previous = back;
if (back)
back->next = node;
else
childset.push_back(node);
increment_length(node->length);
back = node;
}
void add_childset() {
if (childset.size() > 0)
length = -1;
back = NULL;
}
RegExNode *swap_back(RegExNode *node) {
RegExNode *old = back;
if (old) {
if (!old->previous)
childset.remove(childset.size() - 1);
back = old->previous;
increment_length(old->length, true);
}
add_child(node);
return old;
}
};
struct RegExNodeCapturing : public RegExNodeGroup {
int id;
RegExNodeCapturing(int p_id = 0) {
id = p_id;
}
virtual void test_success(RegExSearch &s, int pos) const {
RegExMatch::Group &ref = s.match->captures[id];
ref.length = pos - ref.start;
}
virtual int test(RegExSearch &s, int pos) const {
RegExMatch::Group &ref = s.match->captures[id];
int old_start = ref.start;
ref.start = pos;
int res = RegExNodeGroup::test(s, pos);
if (res < 0)
ref.start = old_start;
return res;
}
virtual int test_parent(RegExSearch &s, int pos) const {
RegExMatch::Group &ref = s.match->captures[id];
ref.length = pos - ref.start;
return RegExNode::test_parent(s, pos);
}
static Variant parse_name(const CharType *&c, bool p_allow_numeric) {
if (c[1] == '0') {
return -1;
} else if ('1' <= c[1] && c[1] <= '9') {
if (!p_allow_numeric)
return -1;
int res = (++c)[0] - '0';
while ('0' <= c[1] && c[1] <= '9')
res = res * 10 + int((++c)[0] - '0');
if ((++c)[0] != '>')
return -1;
return res;
} else if (iswalnum(c[1])) {
String res(++c, 1);
while (iswalnum(c[1]))
res += String(++c, 1);
if ((++c)[0] != '>')
return -1;
return res;
}
return -1;
}
};
struct RegExNodeLookAhead : public RegExNodeGroup {
int id;
RegExNodeLookAhead(bool p_inverse, int p_id = 0) {
quantifiable = false;
inverse = p_inverse;
reset_pos = true;
id = p_id;
}
virtual int test(RegExSearch &s, int pos) const {
s.lookahead_pos[id] = pos;
return RegExNodeGroup::test(s, pos);
}
virtual int test_parent(RegExSearch &s, int pos) const {
return RegExNode::test_parent(s, s.lookahead_pos[id]);
}
};
struct RegExNodeLookBehind : public RegExNodeGroup {
RegExNodeLookBehind(bool p_inverse, int p_id = 0) {
quantifiable = false;
inverse = p_inverse;
reset_pos = true;
}
virtual bool is_look_behind() { return true; }
virtual int test(RegExSearch &s, int pos) const {
if (pos < length)
return -1;
return RegExNodeGroup::test(s, pos - length);
}
};
struct RegExNodeBracket : public RegExNode {
bool inverse;
Vector<RegExNode *> children;
RegExNodeBracket() {
length = 1;
quantifiable = true;
inverse = false;
}
virtual ~RegExNodeBracket() {
for (int i = 0; i < children.size(); ++i)
memdelete(children[i]);
}
virtual int test(RegExSearch &s, int pos) const {
for (int i = 0; i < children.size(); ++i) {
int res = children[i]->test(s, pos);
if (inverse) {
if (res < 0)
res = pos + 1;
else
return -1;
if (i + 1 < children.size())
continue;
}
if (res >= 0)
return next ? next->test(s, res) : res;
}
return -1;
}
void add_child(RegExNode *node) {
node->parent = this;
children.push_back(node);
}
void pop_back() {
memdelete(children[children.size() - 1]);
children.remove(children.size() - 1);
}
};
#define REGEX_EXPAND_FAIL(MSG) \
{ \
ERR_PRINT(MSG); \
return String(); \
}
String RegExMatch::expand(const String &p_template) const {
String res;
for (const CharType *c = p_template.c_str(); *c != '\0'; ++c) {
if (c[0] == '\\') {
if (('1' <= c[1] && c[1] <= '9') || (c[1] == 'g' && c[2] == '{')) {
int ref = 0;
bool unclosed = false;
if (c[1] == 'g') {
unclosed = true;
c = &c[2];
}
while ('0' <= c[1] && c[1] <= '9') {
ref = ref * 10 + int(c[1] - '0');
++c;
}
if (unclosed) {
if (c[1] != '}')
REGEX_EXPAND_FAIL("unclosed backreference '{'");
++c;
}
res += get_string(ref);
} else if (c[1] == 'g' && c[2] == '<') {
const CharType *d = &c[2];
Variant name = RegExNodeCapturing::parse_name(d, true);
if (name == Variant(-1))
REGEX_EXPAND_FAIL("unrecognised character for group name");
c = d;
res += get_string(name);
} else {
const CharType *d = c;
CharType ch = RegExNodeChar::parse_escape(d);
if (c == d)
REGEX_EXPAND_FAIL("invalid escape token");
res += String(&ch, 1);
c = d;
}
} else {
res += String(c, 1);
}
}
return res;
}
int RegExMatch::get_group_count() const {
int count = 0;
for (int i = 1; i < captures.size(); ++i)
if (captures[i].name.get_type() == Variant::INT)
++count;
return count;
}
Array RegExMatch::get_group_array() const {
Array res;
for (int i = 1; i < captures.size(); ++i) {
const RegExMatch::Group &capture = captures[i];
if (capture.name.get_type() != Variant::INT)
continue;
if (capture.start >= 0)
res.push_back(string.substr(capture.start, capture.length));
else
res.push_back(String());
}
return res;
}
Array RegExMatch::get_names() const {
Array res;
for (int i = 1; i < captures.size(); ++i)
if (captures[i].name.get_type() == Variant::STRING)
res.push_back(captures[i].name);
return res;
}
Dictionary RegExMatch::get_name_dict() const {
Dictionary res;
for (int i = 1; i < captures.size(); ++i) {
const RegExMatch::Group &capture = captures[i];
if (capture.name.get_type() != Variant::STRING)
continue;
if (capture.start >= 0)
res[capture.name] = string.substr(capture.start, capture.length);
else
res[capture.name] = String();
}
return res;
}
String RegExMatch::get_string(const Variant &p_name) const {
for (int i = 0; i < captures.size(); ++i) {
const RegExMatch::Group &capture = captures[i];
if (capture.name != p_name)
continue;
if (capture.start == -1)
return String();
return string.substr(capture.start, capture.length);
}
return String();
}
int RegExMatch::get_start(const Variant &p_name) const {
for (int i = 0; i < captures.size(); ++i)
if (captures[i].name == p_name)
return captures[i].start;
return -1;
}
int RegExMatch::get_end(const Variant &p_name) const {
for (int i = 0; i < captures.size(); ++i)
if (captures[i].name == p_name)
return captures[i].start + captures[i].length;
return -1;
}
RegExMatch::RegExMatch() {
}
static bool RegEx_is_shorthand(CharType ch) {
switch (ch) {
case 'w':
case 'W':
case 'd':
case 'D':
case 's':
case 'S':
return true;
default:
break;
}
return false;
}
#define REGEX_COMPILE_FAIL(MSG) \
{ \
ERR_PRINT(MSG); \
clear(); \
return FAILED; \
}
Error RegEx::compile(const String &p_pattern) {
ERR_FAIL_COND_V(p_pattern.length() == 0, FAILED);
if (pattern == p_pattern && root)