-
Notifications
You must be signed in to change notification settings - Fork 22
/
pattern.c
2617 lines (2454 loc) · 62 KB
/
pattern.c
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
/*
* pattern.c: Implemetation of selectors for nodes
*
* Reference:
* http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/
* to some extent
* http://www.w3.org/TR/1999/REC-xml-19991116
*
* See Copyright for the status of this software.
*
* daniel@veillard.com
*/
/*
* TODO:
* - compilation flags to check for specific syntaxes
* using flags of xmlPatterncompile()
* - making clear how pattern starting with / or . need to be handled,
* currently push(NULL, NULL) means a reset of the streaming context
* and indicating we are on / (the document node), probably need
* something similar for .
* - get rid of the "compile" starting with lowercase
* - DONE (2006-05-16): get rid of the Strdup/Strndup in case of dictionary
*/
#define IN_LIBXML
#include "libxml.h"
#include <string.h>
#include <libxml/xmlmemory.h>
#include <libxml/tree.h>
#include <libxml/hash.h>
#include <libxml/dict.h>
#include <libxml/xmlerror.h>
#include <libxml/parserInternals.h>
#include <libxml/pattern.h>
#ifdef LIBXML_PATTERN_ENABLED
/* #define DEBUG_STREAMING */
#ifdef ERROR
#undef ERROR
#endif
#define ERROR(a, b, c, d)
#define ERROR5(a, b, c, d, e)
#define XML_STREAM_STEP_DESC 1
#define XML_STREAM_STEP_FINAL 2
#define XML_STREAM_STEP_ROOT 4
#define XML_STREAM_STEP_ATTR 8
#define XML_STREAM_STEP_NODE 16
#define XML_STREAM_STEP_IN_SET 32
/*
* NOTE: Those private flags (XML_STREAM_xxx) are used
* in _xmlStreamCtxt->flag. They extend the public
* xmlPatternFlags, so be carefull not to interfere with the
* reserved values for xmlPatternFlags.
*/
#define XML_STREAM_FINAL_IS_ANY_NODE 1<<14
#define XML_STREAM_FROM_ROOT 1<<15
#define XML_STREAM_DESC 1<<16
/*
* XML_STREAM_ANY_NODE is used for comparison against
* xmlElementType enums, to indicate a node of any type.
*/
#define XML_STREAM_ANY_NODE 100
#define XML_PATTERN_NOTPATTERN (XML_PATTERN_XPATH | \
XML_PATTERN_XSSEL | \
XML_PATTERN_XSFIELD)
#define XML_STREAM_XS_IDC(c) ((c)->flags & \
(XML_PATTERN_XSSEL | XML_PATTERN_XSFIELD))
#define XML_STREAM_XS_IDC_SEL(c) ((c)->flags & XML_PATTERN_XSSEL)
#define XML_STREAM_XS_IDC_FIELD(c) ((c)->flags & XML_PATTERN_XSFIELD)
#define XML_PAT_COPY_NSNAME(c, r, nsname) \
if ((c)->comp->dict) \
r = (xmlChar *) xmlDictLookup((c)->comp->dict, BAD_CAST nsname, -1); \
else r = xmlStrdup(BAD_CAST nsname);
#define XML_PAT_FREE_STRING(c, r) if ((c)->comp->dict == NULL) xmlFree(r);
typedef struct _xmlStreamStep xmlStreamStep;
typedef xmlStreamStep *xmlStreamStepPtr;
struct _xmlStreamStep {
int flags; /* properties of that step */
const xmlChar *name; /* first string value if NULL accept all */
const xmlChar *ns; /* second string value */
int nodeType; /* type of node */
};
typedef struct _xmlStreamComp xmlStreamComp;
typedef xmlStreamComp *xmlStreamCompPtr;
struct _xmlStreamComp {
xmlDict *dict; /* the dictionary if any */
int nbStep; /* number of steps in the automata */
int maxStep; /* allocated number of steps */
xmlStreamStepPtr steps; /* the array of steps */
int flags;
};
struct _xmlStreamCtxt {
struct _xmlStreamCtxt *next;/* link to next sub pattern if | */
xmlStreamCompPtr comp; /* the compiled stream */
int nbState; /* number of states in the automata */
int maxState; /* allocated number of states */
int level; /* how deep are we ? */
int *states; /* the array of step indexes */
int flags; /* validation options */
int blockLevel;
};
static void xmlFreeStreamComp(xmlStreamCompPtr comp);
/*
* Types are private:
*/
typedef enum {
XML_OP_END=0,
XML_OP_ROOT,
XML_OP_ELEM,
XML_OP_CHILD,
XML_OP_ATTR,
XML_OP_PARENT,
XML_OP_ANCESTOR,
XML_OP_NS,
XML_OP_ALL
} xmlPatOp;
typedef struct _xmlStepState xmlStepState;
typedef xmlStepState *xmlStepStatePtr;
struct _xmlStepState {
int step;
xmlNodePtr node;
};
typedef struct _xmlStepStates xmlStepStates;
typedef xmlStepStates *xmlStepStatesPtr;
struct _xmlStepStates {
int nbstates;
int maxstates;
xmlStepStatePtr states;
};
typedef struct _xmlStepOp xmlStepOp;
typedef xmlStepOp *xmlStepOpPtr;
struct _xmlStepOp {
xmlPatOp op;
const xmlChar *value;
const xmlChar *value2; /* The namespace name */
};
#define PAT_FROM_ROOT (1<<8)
#define PAT_FROM_CUR (1<<9)
struct _xmlPattern {
void *data; /* the associated template */
xmlDictPtr dict; /* the optional dictionary */
struct _xmlPattern *next; /* next pattern if | is used */
const xmlChar *pattern; /* the pattern */
int flags; /* flags */
int nbStep;
int maxStep;
xmlStepOpPtr steps; /* ops for computation */
xmlStreamCompPtr stream; /* the streaming data if any */
};
typedef struct _xmlPatParserContext xmlPatParserContext;
typedef xmlPatParserContext *xmlPatParserContextPtr;
struct _xmlPatParserContext {
const xmlChar *cur; /* the current char being parsed */
const xmlChar *base; /* the full expression */
int error; /* error code */
xmlDictPtr dict; /* the dictionary if any */
xmlPatternPtr comp; /* the result */
xmlNodePtr elem; /* the current node if any */
const xmlChar **namespaces; /* the namespaces definitions */
int nb_namespaces; /* the number of namespaces */
};
/************************************************************************
* *
* Type functions *
* *
************************************************************************/
/**
* xmlNewPattern:
*
* Create a new XSLT Pattern
*
* Returns the newly allocated xmlPatternPtr or NULL in case of error
*/
static xmlPatternPtr
xmlNewPattern(void) {
xmlPatternPtr cur;
cur = (xmlPatternPtr) xmlMalloc(sizeof(xmlPattern));
if (cur == NULL) {
ERROR(NULL, NULL, NULL,
"xmlNewPattern : malloc failed\n");
return(NULL);
}
memset(cur, 0, sizeof(xmlPattern));
cur->maxStep = 10;
cur->steps = (xmlStepOpPtr) xmlMalloc(cur->maxStep * sizeof(xmlStepOp));
if (cur->steps == NULL) {
xmlFree(cur);
ERROR(NULL, NULL, NULL,
"xmlNewPattern : malloc failed\n");
return(NULL);
}
return(cur);
}
/**
* xmlFreePattern:
* @comp: an XSLT comp
*
* Free up the memory allocated by @comp
*/
void
xmlFreePattern(xmlPatternPtr comp) {
xmlStepOpPtr op;
int i;
if (comp == NULL)
return;
if (comp->next != NULL)
xmlFreePattern(comp->next);
if (comp->stream != NULL)
xmlFreeStreamComp(comp->stream);
if (comp->pattern != NULL)
xmlFree((xmlChar *)comp->pattern);
if (comp->steps != NULL) {
if (comp->dict == NULL) {
for (i = 0;i < comp->nbStep;i++) {
op = &comp->steps[i];
if (op->value != NULL)
xmlFree((xmlChar *) op->value);
if (op->value2 != NULL)
xmlFree((xmlChar *) op->value2);
}
}
xmlFree(comp->steps);
}
if (comp->dict != NULL)
xmlDictFree(comp->dict);
memset(comp, -1, sizeof(xmlPattern));
xmlFree(comp);
}
/**
* xmlFreePatternList:
* @comp: an XSLT comp list
*
* Free up the memory allocated by all the elements of @comp
*/
void
xmlFreePatternList(xmlPatternPtr comp) {
xmlPatternPtr cur;
while (comp != NULL) {
cur = comp;
comp = comp->next;
cur->next = NULL;
xmlFreePattern(cur);
}
}
/**
* xmlNewPatParserContext:
* @pattern: the pattern context
* @dict: the inherited dictionary or NULL
* @namespaces: the prefix definitions, array of [URI, prefix] terminated
* with [NULL, NULL] or NULL if no namespace is used
*
* Create a new XML pattern parser context
*
* Returns the newly allocated xmlPatParserContextPtr or NULL in case of error
*/
static xmlPatParserContextPtr
xmlNewPatParserContext(const xmlChar *pattern, xmlDictPtr dict,
const xmlChar **namespaces) {
xmlPatParserContextPtr cur;
if (pattern == NULL)
return(NULL);
cur = (xmlPatParserContextPtr) xmlMalloc(sizeof(xmlPatParserContext));
if (cur == NULL) {
ERROR(NULL, NULL, NULL,
"xmlNewPatParserContext : malloc failed\n");
return(NULL);
}
memset(cur, 0, sizeof(xmlPatParserContext));
cur->dict = dict;
cur->cur = pattern;
cur->base = pattern;
if (namespaces != NULL) {
int i;
for (i = 0;namespaces[2 * i] != NULL;i++)
;
cur->nb_namespaces = i;
} else {
cur->nb_namespaces = 0;
}
cur->namespaces = namespaces;
return(cur);
}
/**
* xmlFreePatParserContext:
* @ctxt: an XSLT parser context
*
* Free up the memory allocated by @ctxt
*/
static void
xmlFreePatParserContext(xmlPatParserContextPtr ctxt) {
if (ctxt == NULL)
return;
memset(ctxt, -1, sizeof(xmlPatParserContext));
xmlFree(ctxt);
}
/**
* xmlPatternAdd:
* @comp: the compiled match expression
* @op: an op
* @value: the first value
* @value2: the second value
*
* Add a step to an XSLT Compiled Match
*
* Returns -1 in case of failure, 0 otherwise.
*/
static int
xmlPatternAdd(xmlPatParserContextPtr ctxt ATTRIBUTE_UNUSED,
xmlPatternPtr comp,
xmlPatOp op, xmlChar * value, xmlChar * value2)
{
if (comp->nbStep >= comp->maxStep) {
xmlStepOpPtr temp;
temp = (xmlStepOpPtr) xmlRealloc(comp->steps, comp->maxStep * 2 *
sizeof(xmlStepOp));
if (temp == NULL) {
ERROR(ctxt, NULL, NULL,
"xmlPatternAdd: realloc failed\n");
return (-1);
}
comp->steps = temp;
comp->maxStep *= 2;
}
comp->steps[comp->nbStep].op = op;
comp->steps[comp->nbStep].value = value;
comp->steps[comp->nbStep].value2 = value2;
comp->nbStep++;
return (0);
}
#if 0
/**
* xsltSwapTopPattern:
* @comp: the compiled match expression
*
* reverse the two top steps.
*/
static void
xsltSwapTopPattern(xmlPatternPtr comp) {
int i;
int j = comp->nbStep - 1;
if (j > 0) {
register const xmlChar *tmp;
register xmlPatOp op;
i = j - 1;
tmp = comp->steps[i].value;
comp->steps[i].value = comp->steps[j].value;
comp->steps[j].value = tmp;
tmp = comp->steps[i].value2;
comp->steps[i].value2 = comp->steps[j].value2;
comp->steps[j].value2 = tmp;
op = comp->steps[i].op;
comp->steps[i].op = comp->steps[j].op;
comp->steps[j].op = op;
}
}
#endif
/**
* xmlReversePattern:
* @comp: the compiled match expression
*
* reverse all the stack of expressions
*
* returns 0 in case of success and -1 in case of error.
*/
static int
xmlReversePattern(xmlPatternPtr comp) {
int i, j;
/*
* remove the leading // for //a or .//a
*/
if ((comp->nbStep > 0) && (comp->steps[0].op == XML_OP_ANCESTOR)) {
for (i = 0, j = 1;j < comp->nbStep;i++,j++) {
comp->steps[i].value = comp->steps[j].value;
comp->steps[i].value2 = comp->steps[j].value2;
comp->steps[i].op = comp->steps[j].op;
}
comp->nbStep--;
}
if (comp->nbStep >= comp->maxStep) {
xmlStepOpPtr temp;
temp = (xmlStepOpPtr) xmlRealloc(comp->steps, comp->maxStep * 2 *
sizeof(xmlStepOp));
if (temp == NULL) {
ERROR(ctxt, NULL, NULL,
"xmlReversePattern: realloc failed\n");
return (-1);
}
comp->steps = temp;
comp->maxStep *= 2;
}
i = 0;
j = comp->nbStep - 1;
while (j > i) {
register const xmlChar *tmp;
register xmlPatOp op;
tmp = comp->steps[i].value;
comp->steps[i].value = comp->steps[j].value;
comp->steps[j].value = tmp;
tmp = comp->steps[i].value2;
comp->steps[i].value2 = comp->steps[j].value2;
comp->steps[j].value2 = tmp;
op = comp->steps[i].op;
comp->steps[i].op = comp->steps[j].op;
comp->steps[j].op = op;
j--;
i++;
}
comp->steps[comp->nbStep].value = NULL;
comp->steps[comp->nbStep].value2 = NULL;
comp->steps[comp->nbStep++].op = XML_OP_END;
return(0);
}
/************************************************************************
* *
* The interpreter for the precompiled patterns *
* *
************************************************************************/
static int
xmlPatPushState(xmlStepStates *states, int step, xmlNodePtr node) {
if ((states->states == NULL) || (states->maxstates <= 0)) {
states->maxstates = 4;
states->nbstates = 0;
states->states = xmlMalloc(4 * sizeof(xmlStepState));
}
else if (states->maxstates <= states->nbstates) {
xmlStepState *tmp;
tmp = (xmlStepStatePtr) xmlRealloc(states->states,
2 * states->maxstates * sizeof(xmlStepState));
if (tmp == NULL)
return(-1);
states->states = tmp;
states->maxstates *= 2;
}
states->states[states->nbstates].step = step;
states->states[states->nbstates++].node = node;
#if 0
fprintf(stderr, "Push: %d, %s\n", step, node->name);
#endif
return(0);
}
/**
* xmlPatMatch:
* @comp: the precompiled pattern
* @node: a node
*
* Test whether the node matches the pattern
*
* Returns 1 if it matches, 0 if it doesn't and -1 in case of failure
*/
static int
xmlPatMatch(xmlPatternPtr comp, xmlNodePtr node) {
int i;
xmlStepOpPtr step;
xmlStepStates states = {0, 0, NULL}; /* // may require backtrack */
if ((comp == NULL) || (node == NULL)) return(-1);
i = 0;
restart:
for (;i < comp->nbStep;i++) {
step = &comp->steps[i];
switch (step->op) {
case XML_OP_END:
goto found;
case XML_OP_ROOT:
if (node->type == XML_NAMESPACE_DECL)
goto rollback;
node = node->parent;
if ((node->type == XML_DOCUMENT_NODE) ||
#ifdef LIBXML_DOCB_ENABLED
(node->type == XML_DOCB_DOCUMENT_NODE) ||
#endif
(node->type == XML_HTML_DOCUMENT_NODE))
continue;
goto rollback;
case XML_OP_ELEM:
if (node->type != XML_ELEMENT_NODE)
goto rollback;
if (step->value == NULL)
continue;
if (step->value[0] != node->name[0])
goto rollback;
if (!xmlStrEqual(step->value, node->name))
goto rollback;
/* Namespace test */
if (node->ns == NULL) {
if (step->value2 != NULL)
goto rollback;
} else if (node->ns->href != NULL) {
if (step->value2 == NULL)
goto rollback;
if (!xmlStrEqual(step->value2, node->ns->href))
goto rollback;
}
continue;
case XML_OP_CHILD: {
xmlNodePtr lst;
if ((node->type != XML_ELEMENT_NODE) &&
(node->type != XML_DOCUMENT_NODE) &&
#ifdef LIBXML_DOCB_ENABLED
(node->type != XML_DOCB_DOCUMENT_NODE) &&
#endif
(node->type != XML_HTML_DOCUMENT_NODE))
goto rollback;
lst = node->children;
if (step->value != NULL) {
while (lst != NULL) {
if ((lst->type == XML_ELEMENT_NODE) &&
(step->value[0] == lst->name[0]) &&
(xmlStrEqual(step->value, lst->name)))
break;
lst = lst->next;
}
if (lst != NULL)
continue;
}
goto rollback;
}
case XML_OP_ATTR:
if (node->type != XML_ATTRIBUTE_NODE)
goto rollback;
if (step->value != NULL) {
if (step->value[0] != node->name[0])
goto rollback;
if (!xmlStrEqual(step->value, node->name))
goto rollback;
}
/* Namespace test */
if (node->ns == NULL) {
if (step->value2 != NULL)
goto rollback;
} else if (step->value2 != NULL) {
if (!xmlStrEqual(step->value2, node->ns->href))
goto rollback;
}
continue;
case XML_OP_PARENT:
if ((node->type == XML_DOCUMENT_NODE) ||
(node->type == XML_HTML_DOCUMENT_NODE) ||
#ifdef LIBXML_DOCB_ENABLED
(node->type == XML_DOCB_DOCUMENT_NODE) ||
#endif
(node->type == XML_NAMESPACE_DECL))
goto rollback;
node = node->parent;
if (node == NULL)
goto rollback;
if (step->value == NULL)
continue;
if (step->value[0] != node->name[0])
goto rollback;
if (!xmlStrEqual(step->value, node->name))
goto rollback;
/* Namespace test */
if (node->ns == NULL) {
if (step->value2 != NULL)
goto rollback;
} else if (node->ns->href != NULL) {
if (step->value2 == NULL)
goto rollback;
if (!xmlStrEqual(step->value2, node->ns->href))
goto rollback;
}
continue;
case XML_OP_ANCESTOR:
/* TODO: implement coalescing of ANCESTOR/NODE ops */
if (step->value == NULL) {
i++;
step = &comp->steps[i];
if (step->op == XML_OP_ROOT)
goto found;
if (step->op != XML_OP_ELEM)
goto rollback;
if (step->value == NULL)
return(-1);
}
if (node == NULL)
goto rollback;
if ((node->type == XML_DOCUMENT_NODE) ||
(node->type == XML_HTML_DOCUMENT_NODE) ||
#ifdef LIBXML_DOCB_ENABLED
(node->type == XML_DOCB_DOCUMENT_NODE) ||
#endif
(node->type == XML_NAMESPACE_DECL))
goto rollback;
node = node->parent;
while (node != NULL) {
if ((node->type == XML_ELEMENT_NODE) &&
(step->value[0] == node->name[0]) &&
(xmlStrEqual(step->value, node->name))) {
/* Namespace test */
if (node->ns == NULL) {
if (step->value2 == NULL)
break;
} else if (node->ns->href != NULL) {
if ((step->value2 != NULL) &&
(xmlStrEqual(step->value2, node->ns->href)))
break;
}
}
node = node->parent;
}
if (node == NULL)
goto rollback;
/*
* prepare a potential rollback from here
* for ancestors of that node.
*/
if (step->op == XML_OP_ANCESTOR)
xmlPatPushState(&states, i, node);
else
xmlPatPushState(&states, i - 1, node);
continue;
case XML_OP_NS:
if (node->type != XML_ELEMENT_NODE)
goto rollback;
if (node->ns == NULL) {
if (step->value != NULL)
goto rollback;
} else if (node->ns->href != NULL) {
if (step->value == NULL)
goto rollback;
if (!xmlStrEqual(step->value, node->ns->href))
goto rollback;
}
break;
case XML_OP_ALL:
if (node->type != XML_ELEMENT_NODE)
goto rollback;
break;
}
}
found:
if (states.states != NULL) {
/* Free the rollback states */
xmlFree(states.states);
}
return(1);
rollback:
/* got an error try to rollback */
if (states.states == NULL)
return(0);
if (states.nbstates <= 0) {
xmlFree(states.states);
return(0);
}
states.nbstates--;
i = states.states[states.nbstates].step;
node = states.states[states.nbstates].node;
#if 0
fprintf(stderr, "Pop: %d, %s\n", i, node->name);
#endif
goto restart;
}
/************************************************************************
* *
* Dedicated parser for templates *
* *
************************************************************************/
#define TODO \
xmlGenericError(xmlGenericErrorContext, \
"Unimplemented block at %s:%d\n", \
__FILE__, __LINE__);
#define CUR (*ctxt->cur)
#define SKIP(val) ctxt->cur += (val)
#define NXT(val) ctxt->cur[(val)]
#define PEEKPREV(val) ctxt->cur[-(val)]
#define CUR_PTR ctxt->cur
#define SKIP_BLANKS \
while (IS_BLANK_CH(CUR)) NEXT
#define CURRENT (*ctxt->cur)
#define NEXT ((*ctxt->cur) ? ctxt->cur++: ctxt->cur)
#define PUSH(op, val, val2) \
if (xmlPatternAdd(ctxt, ctxt->comp, (op), (val), (val2))) goto error;
#define XSLT_ERROR(X) \
{ xsltError(ctxt, __FILE__, __LINE__, X); \
ctxt->error = (X); return; }
#define XSLT_ERROR0(X) \
{ xsltError(ctxt, __FILE__, __LINE__, X); \
ctxt->error = (X); return(0); }
#if 0
/**
* xmlPatScanLiteral:
* @ctxt: the XPath Parser context
*
* Parse an XPath Litteral:
*
* [29] Literal ::= '"' [^"]* '"'
* | "'" [^']* "'"
*
* Returns the Literal parsed or NULL
*/
static xmlChar *
xmlPatScanLiteral(xmlPatParserContextPtr ctxt) {
const xmlChar *q, *cur;
xmlChar *ret = NULL;
int val, len;
SKIP_BLANKS;
if (CUR == '"') {
NEXT;
cur = q = CUR_PTR;
val = xmlStringCurrentChar(NULL, cur, &len);
while ((IS_CHAR(val)) && (val != '"')) {
cur += len;
val = xmlStringCurrentChar(NULL, cur, &len);
}
if (!IS_CHAR(val)) {
ctxt->error = 1;
return(NULL);
} else {
if (ctxt->dict)
ret = (xmlChar *) xmlDictLookup(ctxt->dict, q, cur - q);
else
ret = xmlStrndup(q, cur - q);
}
cur += len;
CUR_PTR = cur;
} else if (CUR == '\'') {
NEXT;
cur = q = CUR_PTR;
val = xmlStringCurrentChar(NULL, cur, &len);
while ((IS_CHAR(val)) && (val != '\'')) {
cur += len;
val = xmlStringCurrentChar(NULL, cur, &len);
}
if (!IS_CHAR(val)) {
ctxt->error = 1;
return(NULL);
} else {
if (ctxt->dict)
ret = (xmlChar *) xmlDictLookup(ctxt->dict, q, cur - q);
else
ret = xmlStrndup(q, cur - q);
}
cur += len;
CUR_PTR = cur;
} else {
/* XP_ERROR(XPATH_START_LITERAL_ERROR); */
ctxt->error = 1;
return(NULL);
}
return(ret);
}
#endif
/**
* xmlPatScanName:
* @ctxt: the XPath Parser context
*
* [4] NameChar ::= Letter | Digit | '.' | '-' | '_' |
* CombiningChar | Extender
*
* [5] Name ::= (Letter | '_' | ':') (NameChar)*
*
* [6] Names ::= Name (S Name)*
*
* Returns the Name parsed or NULL
*/
static xmlChar *
xmlPatScanName(xmlPatParserContextPtr ctxt) {
const xmlChar *q, *cur;
xmlChar *ret = NULL;
int val, len;
SKIP_BLANKS;
cur = q = CUR_PTR;
val = xmlStringCurrentChar(NULL, cur, &len);
if (!IS_LETTER(val) && (val != '_') && (val != ':'))
return(NULL);
while ((IS_LETTER(val)) || (IS_DIGIT(val)) ||
(val == '.') || (val == '-') ||
(val == '_') ||
(IS_COMBINING(val)) ||
(IS_EXTENDER(val))) {
cur += len;
val = xmlStringCurrentChar(NULL, cur, &len);
}
if (ctxt->dict)
ret = (xmlChar *) xmlDictLookup(ctxt->dict, q, cur - q);
else
ret = xmlStrndup(q, cur - q);
CUR_PTR = cur;
return(ret);
}
/**
* xmlPatScanNCName:
* @ctxt: the XPath Parser context
*
* Parses a non qualified name
*
* Returns the Name parsed or NULL
*/
static xmlChar *
xmlPatScanNCName(xmlPatParserContextPtr ctxt) {
const xmlChar *q, *cur;
xmlChar *ret = NULL;
int val, len;
SKIP_BLANKS;
cur = q = CUR_PTR;
val = xmlStringCurrentChar(NULL, cur, &len);
if (!IS_LETTER(val) && (val != '_'))
return(NULL);
while ((IS_LETTER(val)) || (IS_DIGIT(val)) ||
(val == '.') || (val == '-') ||
(val == '_') ||
(IS_COMBINING(val)) ||
(IS_EXTENDER(val))) {
cur += len;
val = xmlStringCurrentChar(NULL, cur, &len);
}
if (ctxt->dict)
ret = (xmlChar *) xmlDictLookup(ctxt->dict, q, cur - q);
else
ret = xmlStrndup(q, cur - q);
CUR_PTR = cur;
return(ret);
}
#if 0
/**
* xmlPatScanQName:
* @ctxt: the XPath Parser context
* @prefix: the place to store the prefix
*
* Parse a qualified name
*
* Returns the Name parsed or NULL
*/
static xmlChar *
xmlPatScanQName(xmlPatParserContextPtr ctxt, xmlChar **prefix) {
xmlChar *ret = NULL;
*prefix = NULL;
ret = xmlPatScanNCName(ctxt);
if (CUR == ':') {
*prefix = ret;
NEXT;
ret = xmlPatScanNCName(ctxt);
}
return(ret);
}
#endif
/**
* xmlCompileAttributeTest:
* @ctxt: the compilation context
*
* Compile an attribute test.
*/
static void
xmlCompileAttributeTest(xmlPatParserContextPtr ctxt) {
xmlChar *token = NULL;
xmlChar *name = NULL;
xmlChar *URL = NULL;
SKIP_BLANKS;
name = xmlPatScanNCName(ctxt);
if (name == NULL) {
if (CUR == '*') {
PUSH(XML_OP_ATTR, NULL, NULL);
NEXT;
} else {
ERROR(NULL, NULL, NULL,
"xmlCompileAttributeTest : Name expected\n");
ctxt->error = 1;
}
return;
}
if (CUR == ':') {
int i;
xmlChar *prefix = name;
NEXT;
if (IS_BLANK_CH(CUR)) {
ERROR5(NULL, NULL, NULL, "Invalid QName.\n", NULL);
XML_PAT_FREE_STRING(ctxt, prefix);
ctxt->error = 1;
goto error;
}
/*
* This is a namespace match
*/
token = xmlPatScanName(ctxt);
if ((prefix[0] == 'x') &&
(prefix[1] == 'm') &&
(prefix[2] == 'l') &&
(prefix[3] == 0))
{
XML_PAT_COPY_NSNAME(ctxt, URL, XML_XML_NAMESPACE);
} else {
for (i = 0;i < ctxt->nb_namespaces;i++) {
if (xmlStrEqual(ctxt->namespaces[2 * i + 1], prefix)) {
XML_PAT_COPY_NSNAME(ctxt, URL, ctxt->namespaces[2 * i])
break;
}
}
if (i >= ctxt->nb_namespaces) {
ERROR5(NULL, NULL, NULL,
"xmlCompileAttributeTest : no namespace bound to prefix %s\n",
prefix);
ctxt->error = 1;
goto error;
}
}
XML_PAT_FREE_STRING(ctxt, prefix);
if (token == NULL) {
if (CUR == '*') {
NEXT;
PUSH(XML_OP_ATTR, NULL, URL);
} else {
ERROR(NULL, NULL, NULL,
"xmlCompileAttributeTest : Name expected\n");
ctxt->error = 1;
goto error;
}
} else {
PUSH(XML_OP_ATTR, token, URL);
}
} else {
PUSH(XML_OP_ATTR, name, NULL);
}
return;
error:
if (URL != NULL)
XML_PAT_FREE_STRING(ctxt, URL)
if (token != NULL)
XML_PAT_FREE_STRING(ctxt, token);
}