ReactOS  0.4.15-dev-1636-gf634010
pattern.c
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1 /*
2  * pattern.c: Implemetation of the template match compilation and lookup
3  *
4  * Reference:
5  * http://www.w3.org/TR/1999/REC-xslt-19991116
6  *
7  * See Copyright for the status of this software.
8  *
9  * daniel@veillard.com
10  */
11 
12 /*
13  * TODO: handle pathological cases like *[*[@a="b"]]
14  * TODO: detect [number] at compilation, optimize accordingly
15  */
16 
17 #include "precomp.h"
18 
19 #ifdef WITH_XSLT_DEBUG
20 #define WITH_XSLT_DEBUG_PATTERN
21 #endif
22 
23 /*
24  * Types are private:
25  */
26 
27 typedef enum {
28  XSLT_OP_END=0,
29  XSLT_OP_ROOT,
30  XSLT_OP_ELEM,
31  XSLT_OP_ATTR,
32  XSLT_OP_PARENT,
33  XSLT_OP_ANCESTOR,
34  XSLT_OP_ID,
35  XSLT_OP_KEY,
36  XSLT_OP_NS,
37  XSLT_OP_ALL,
38  XSLT_OP_PI,
39  XSLT_OP_COMMENT,
40  XSLT_OP_TEXT,
41  XSLT_OP_NODE,
42  XSLT_OP_PREDICATE
43 } xsltOp;
44 
45 typedef enum {
46  AXIS_CHILD=1,
47  AXIS_ATTRIBUTE
48 } xsltAxis;
49 
50 typedef struct _xsltStepState xsltStepState;
51 typedef xsltStepState *xsltStepStatePtr;
52 struct _xsltStepState {
53  int step;
54  xmlNodePtr node;
55 };
56 
57 typedef struct _xsltStepStates xsltStepStates;
58 typedef xsltStepStates *xsltStepStatesPtr;
59 struct _xsltStepStates {
60  int nbstates;
61  int maxstates;
62  xsltStepStatePtr states;
63 };
64 
65 typedef struct _xsltStepOp xsltStepOp;
66 typedef xsltStepOp *xsltStepOpPtr;
67 struct _xsltStepOp {
68  xsltOp op;
69  xmlChar *value;
70  xmlChar *value2;
71  xmlChar *value3;
72  xmlXPathCompExprPtr comp;
73  /*
74  * Optimisations for count
75  */
76  int previousExtra;
77  int indexExtra;
78  int lenExtra;
79 };
80 
81 struct _xsltCompMatch {
82  struct _xsltCompMatch *next; /* siblings in the name hash */
83  float priority; /* the priority */
84  const xmlChar *pattern; /* the pattern */
85  const xmlChar *mode; /* the mode */
86  const xmlChar *modeURI; /* the mode URI */
87  xsltTemplatePtr template; /* the associated template */
88  xmlNodePtr node; /* the containing element */
89 
90  int direct;
91  /* TODO fix the statically allocated size steps[] */
92  int nbStep;
93  int maxStep;
94  xmlNsPtr *nsList; /* the namespaces in scope */
95  int nsNr; /* the number of namespaces in scope */
96  xsltStepOpPtr steps; /* ops for computation */
97 };
98 
99 typedef struct _xsltParserContext xsltParserContext;
100 typedef xsltParserContext *xsltParserContextPtr;
101 struct _xsltParserContext {
102  xsltStylesheetPtr style; /* the stylesheet */
103  xsltTransformContextPtr ctxt; /* the transformation or NULL */
104  const xmlChar *cur; /* the current char being parsed */
105  const xmlChar *base; /* the full expression */
106  xmlDocPtr doc; /* the source document */
107  xmlNodePtr elem; /* the source element */
108  int error; /* error code */
109  xsltCompMatchPtr comp; /* the result */
110 };
111 
112 /************************************************************************
113  * *
114  * Type functions *
115  * *
116  ************************************************************************/
117 
125 static xsltCompMatchPtr
126 xsltNewCompMatch(void) {
127  xsltCompMatchPtr cur;
128 
129  cur = (xsltCompMatchPtr) xmlMalloc(sizeof(xsltCompMatch));
130  if (cur == NULL) {
131  xsltTransformError(NULL, NULL, NULL,
132  "xsltNewCompMatch : out of memory error\n");
133  return(NULL);
134  }
135  memset(cur, 0, sizeof(xsltCompMatch));
136  cur->maxStep = 10;
137  cur->nbStep = 0;
138  cur-> steps = (xsltStepOpPtr) xmlMalloc(sizeof(xsltStepOp) *
139  cur->maxStep);
140  if (cur->steps == NULL) {
141  xsltTransformError(NULL, NULL, NULL,
142  "xsltNewCompMatch : out of memory error\n");
143  xmlFree(cur);
144  return(NULL);
145  }
146  cur->nsNr = 0;
147  cur->nsList = NULL;
148  cur->direct = 0;
149  return(cur);
150 }
151 
158 static void
159 xsltFreeCompMatch(xsltCompMatchPtr comp) {
160  xsltStepOpPtr op;
161  int i;
162 
163  if (comp == NULL)
164  return;
165  if (comp->pattern != NULL)
166  xmlFree((xmlChar *)comp->pattern);
167  if (comp->nsList != NULL)
168  xmlFree(comp->nsList);
169  for (i = 0;i < comp->nbStep;i++) {
170  op = &comp->steps[i];
171  if (op->value != NULL)
172  xmlFree(op->value);
173  if (op->value2 != NULL)
174  xmlFree(op->value2);
175  if (op->value3 != NULL)
176  xmlFree(op->value3);
177  if (op->comp != NULL)
178  xmlXPathFreeCompExpr(op->comp);
179  }
180  xmlFree(comp->steps);
181  memset(comp, -1, sizeof(xsltCompMatch));
182  xmlFree(comp);
183 }
184 
191 void
192 xsltFreeCompMatchList(xsltCompMatchPtr comp) {
193  xsltCompMatchPtr cur;
194 
195  while (comp != NULL) {
196  cur = comp;
197  comp = comp->next;
198  xsltFreeCompMatch(cur);
199  }
200 }
201 
202 static void
203 xsltFreeCompMatchListEntry(void *payload,
204  const xmlChar *name ATTRIBUTE_UNUSED) {
205  xsltFreeCompMatchList((xsltCompMatchPtr) payload);
206 }
207 
217 void xsltNormalizeCompSteps(void *payload,
218  void *data, const xmlChar *name ATTRIBUTE_UNUSED) {
219  xsltCompMatchPtr comp = payload;
220  xsltStylesheetPtr style = data;
221  int ix;
222 
223  for (ix = 0; ix < comp->nbStep; ix++) {
224  comp->steps[ix].previousExtra += style->extrasNr;
225  comp->steps[ix].indexExtra += style->extrasNr;
226  comp->steps[ix].lenExtra += style->extrasNr;
227  }
228 }
229 
239 static xsltParserContextPtr
240 xsltNewParserContext(xsltStylesheetPtr style, xsltTransformContextPtr ctxt) {
241  xsltParserContextPtr cur;
242 
243  cur = (xsltParserContextPtr) xmlMalloc(sizeof(xsltParserContext));
244  if (cur == NULL) {
245  xsltTransformError(NULL, NULL, NULL,
246  "xsltNewParserContext : malloc failed\n");
247  return(NULL);
248  }
249  memset(cur, 0, sizeof(xsltParserContext));
250  cur->style = style;
251  cur->ctxt = ctxt;
252  return(cur);
253 }
254 
261 static void
262 xsltFreeParserContext(xsltParserContextPtr ctxt) {
263  if (ctxt == NULL)
264  return;
265  memset(ctxt, -1, sizeof(xsltParserContext));
266  xmlFree(ctxt);
267 }
268 
281 static int
282 xsltCompMatchAdd(xsltParserContextPtr ctxt, xsltCompMatchPtr comp,
283  xsltOp op, xmlChar * value, xmlChar * value2, int novar)
284 {
285  if (comp->nbStep >= comp->maxStep) {
286  xsltStepOpPtr tmp;
287 
288  tmp = (xsltStepOpPtr) xmlRealloc(comp->steps, comp->maxStep * 2 *
289  sizeof(xsltStepOp));
290  if (tmp == NULL) {
291  xsltGenericError(xsltGenericErrorContext,
292  "xsltCompMatchAdd: memory re-allocation failure.\n");
293  if (ctxt->style != NULL)
294  ctxt->style->errors++;
295  if (value)
296  xmlFree(value);
297  if (value2)
298  xmlFree(value2);
299  return (-1);
300  }
301  comp->maxStep *= 2;
302  comp->steps = tmp;
303  }
304  comp->steps[comp->nbStep].op = op;
305  comp->steps[comp->nbStep].value = value;
306  comp->steps[comp->nbStep].value2 = value2;
307  comp->steps[comp->nbStep].value3 = NULL;
308  comp->steps[comp->nbStep].comp = NULL;
309  if (ctxt->ctxt != NULL) {
310  comp->steps[comp->nbStep].previousExtra =
311  xsltAllocateExtraCtxt(ctxt->ctxt);
312  comp->steps[comp->nbStep].indexExtra =
313  xsltAllocateExtraCtxt(ctxt->ctxt);
314  comp->steps[comp->nbStep].lenExtra =
315  xsltAllocateExtraCtxt(ctxt->ctxt);
316  } else {
317  comp->steps[comp->nbStep].previousExtra =
318  xsltAllocateExtra(ctxt->style);
319  comp->steps[comp->nbStep].indexExtra =
320  xsltAllocateExtra(ctxt->style);
321  comp->steps[comp->nbStep].lenExtra =
322  xsltAllocateExtra(ctxt->style);
323  }
324  if (op == XSLT_OP_PREDICATE) {
325  int flags = 0;
326 
327 #ifdef XML_XPATH_NOVAR
328  if (novar != 0)
329  flags = XML_XPATH_NOVAR;
330 #endif
331  comp->steps[comp->nbStep].comp = xsltXPathCompileFlags(ctxt->style,
332  value, flags);
333  if (comp->steps[comp->nbStep].comp == NULL) {
334  xsltTransformError(NULL, ctxt->style, ctxt->elem,
335  "Failed to compile predicate\n");
336  if (ctxt->style != NULL)
337  ctxt->style->errors++;
338  }
339  }
340  comp->nbStep++;
341  return (0);
342 }
343 
350 static void
351 xsltSwapTopCompMatch(xsltCompMatchPtr comp) {
352  int i;
353  int j = comp->nbStep - 1;
354 
355  if (j > 0) {
356  register xmlChar *tmp;
357  register xsltOp op;
358  register xmlXPathCompExprPtr expr;
359  register int t;
360  i = j - 1;
361  tmp = comp->steps[i].value;
362  comp->steps[i].value = comp->steps[j].value;
363  comp->steps[j].value = tmp;
364  tmp = comp->steps[i].value2;
365  comp->steps[i].value2 = comp->steps[j].value2;
366  comp->steps[j].value2 = tmp;
367  tmp = comp->steps[i].value3;
368  comp->steps[i].value3 = comp->steps[j].value3;
369  comp->steps[j].value3 = tmp;
370  op = comp->steps[i].op;
371  comp->steps[i].op = comp->steps[j].op;
372  comp->steps[j].op = op;
373  expr = comp->steps[i].comp;
374  comp->steps[i].comp = comp->steps[j].comp;
375  comp->steps[j].comp = expr;
376  t = comp->steps[i].previousExtra;
377  comp->steps[i].previousExtra = comp->steps[j].previousExtra;
378  comp->steps[j].previousExtra = t;
379  t = comp->steps[i].indexExtra;
380  comp->steps[i].indexExtra = comp->steps[j].indexExtra;
381  comp->steps[j].indexExtra = t;
382  t = comp->steps[i].lenExtra;
383  comp->steps[i].lenExtra = comp->steps[j].lenExtra;
384  comp->steps[j].lenExtra = t;
385  }
386 }
387 
395 static void
396 xsltReverseCompMatch(xsltParserContextPtr ctxt, xsltCompMatchPtr comp) {
397  int i = 0;
398  int j = comp->nbStep - 1;
399 
400  while (j > i) {
401  register xmlChar *tmp;
402  register xsltOp op;
403  register xmlXPathCompExprPtr expr;
404  register int t;
405 
406  tmp = comp->steps[i].value;
407  comp->steps[i].value = comp->steps[j].value;
408  comp->steps[j].value = tmp;
409  tmp = comp->steps[i].value2;
410  comp->steps[i].value2 = comp->steps[j].value2;
411  comp->steps[j].value2 = tmp;
412  tmp = comp->steps[i].value3;
413  comp->steps[i].value3 = comp->steps[j].value3;
414  comp->steps[j].value3 = tmp;
415  op = comp->steps[i].op;
416  comp->steps[i].op = comp->steps[j].op;
417  comp->steps[j].op = op;
418  expr = comp->steps[i].comp;
419  comp->steps[i].comp = comp->steps[j].comp;
420  comp->steps[j].comp = expr;
421  t = comp->steps[i].previousExtra;
422  comp->steps[i].previousExtra = comp->steps[j].previousExtra;
423  comp->steps[j].previousExtra = t;
424  t = comp->steps[i].indexExtra;
425  comp->steps[i].indexExtra = comp->steps[j].indexExtra;
426  comp->steps[j].indexExtra = t;
427  t = comp->steps[i].lenExtra;
428  comp->steps[i].lenExtra = comp->steps[j].lenExtra;
429  comp->steps[j].lenExtra = t;
430  j--;
431  i++;
432  }
433  xsltCompMatchAdd(ctxt, comp, XSLT_OP_END, NULL, NULL, 0);
434 
435  /*
436  * Detect consecutive XSLT_OP_PREDICATE and predicates on ops which
437  * haven't been optimized yet indicating a direct matching should be done.
438  */
439  for (i = 0;i < comp->nbStep - 1;i++) {
440  xsltOp op = comp->steps[i].op;
441 
442  if ((op != XSLT_OP_ELEM) &&
443  (op != XSLT_OP_ALL) &&
444  (comp->steps[i + 1].op == XSLT_OP_PREDICATE)) {
445 
446  comp->direct = 1;
447  if (comp->pattern[0] != '/') {
448  xmlChar *query;
449 
450  query = xmlStrdup((const xmlChar *)"//");
451  query = xmlStrcat(query, comp->pattern);
452 
453  xmlFree((xmlChar *) comp->pattern);
454  comp->pattern = query;
455  }
456  break;
457  }
458  }
459 }
460 
461 /************************************************************************
462  * *
463  * The interpreter for the precompiled patterns *
464  * *
465  ************************************************************************/
466 
467 static int
468 xsltPatPushState(xsltTransformContextPtr ctxt, xsltStepStates *states,
469  int step, xmlNodePtr node) {
470  if ((states->states == NULL) || (states->maxstates <= 0)) {
471  states->maxstates = 4;
472  states->nbstates = 0;
473  states->states = xmlMalloc(4 * sizeof(xsltStepState));
474  }
475  else if (states->maxstates <= states->nbstates) {
476  xsltStepState *tmp;
477 
478  tmp = (xsltStepStatePtr) xmlRealloc(states->states,
479  2 * states->maxstates * sizeof(xsltStepState));
480  if (tmp == NULL) {
481  xsltGenericError(xsltGenericErrorContext,
482  "xsltPatPushState: memory re-allocation failure.\n");
483  ctxt->state = XSLT_STATE_STOPPED;
484  return(-1);
485  }
486  states->states = tmp;
487  states->maxstates *= 2;
488  }
489  states->states[states->nbstates].step = step;
490  states->states[states->nbstates++].node = node;
491 #if 0
492  fprintf(stderr, "Push: %d, %s\n", step, node->name);
493 #endif
494  return(0);
495 }
496 
497 static void
498 xmlXPathFreeObjectWrapper(void *obj) {
499  xmlXPathFreeObject((xmlXPathObjectPtr) obj);
500 }
501 
515 static int
516 xsltTestCompMatchDirect(xsltTransformContextPtr ctxt, xsltCompMatchPtr comp,
517  xmlNodePtr node, xmlNsPtr *nsList, int nsNr) {
518  xsltStepOpPtr sel = NULL;
519  xmlDocPtr prevdoc;
520  xmlDocPtr doc;
521  xmlXPathObjectPtr list;
522  int ix, j;
523  int nocache = 0;
524  int isRVT;
525 
526  doc = node->doc;
527  if (XSLT_IS_RES_TREE_FRAG(doc))
528  isRVT = 1;
529  else
530  isRVT = 0;
531  sel = &comp->steps[0]; /* store extra in first step arbitrarily */
532 
533  prevdoc = (xmlDocPtr)
534  XSLT_RUNTIME_EXTRA(ctxt, sel->previousExtra, ptr);
535  ix = XSLT_RUNTIME_EXTRA(ctxt, sel->indexExtra, ival);
536  list = (xmlXPathObjectPtr)
537  XSLT_RUNTIME_EXTRA_LST(ctxt, sel->lenExtra);
538 
539  if ((list == NULL) || (prevdoc != doc)) {
540  xmlXPathObjectPtr newlist;
541  xmlNodePtr parent = node->parent;
542  xmlDocPtr olddoc;
543  xmlNodePtr oldnode;
544  int oldNsNr, oldContextSize, oldProximityPosition;
545  xmlNsPtr *oldNamespaces;
546 
547  oldnode = ctxt->xpathCtxt->node;
548  olddoc = ctxt->xpathCtxt->doc;
549  oldNsNr = ctxt->xpathCtxt->nsNr;
550  oldNamespaces = ctxt->xpathCtxt->namespaces;
551  oldContextSize = ctxt->xpathCtxt->contextSize;
552  oldProximityPosition = ctxt->xpathCtxt->proximityPosition;
553  ctxt->xpathCtxt->node = node;
554  ctxt->xpathCtxt->doc = doc;
555  ctxt->xpathCtxt->namespaces = nsList;
556  ctxt->xpathCtxt->nsNr = nsNr;
557  newlist = xmlXPathEval(comp->pattern, ctxt->xpathCtxt);
558  ctxt->xpathCtxt->node = oldnode;
559  ctxt->xpathCtxt->doc = olddoc;
560  ctxt->xpathCtxt->namespaces = oldNamespaces;
561  ctxt->xpathCtxt->nsNr = oldNsNr;
562  ctxt->xpathCtxt->contextSize = oldContextSize;
563  ctxt->xpathCtxt->proximityPosition = oldProximityPosition;
564  if (newlist == NULL)
565  return(-1);
566  if (newlist->type != XPATH_NODESET) {
567  xmlXPathFreeObject(newlist);
568  return(-1);
569  }
570  ix = 0;
571 
572  if ((parent == NULL) || (node->doc == NULL) || isRVT)
573  nocache = 1;
574 
575  if (nocache == 0) {
576  if (list != NULL)
577  xmlXPathFreeObject(list);
578  list = newlist;
579 
580  XSLT_RUNTIME_EXTRA_LST(ctxt, sel->lenExtra) =
581  (void *) list;
582  XSLT_RUNTIME_EXTRA(ctxt, sel->previousExtra, ptr) =
583  (void *) doc;
584  XSLT_RUNTIME_EXTRA(ctxt, sel->indexExtra, ival) =
585  0;
586  XSLT_RUNTIME_EXTRA_FREE(ctxt, sel->lenExtra) =
587  xmlXPathFreeObjectWrapper;
588  } else
589  list = newlist;
590  }
591  if ((list->nodesetval == NULL) ||
592  (list->nodesetval->nodeNr <= 0)) {
593  if (nocache == 1)
594  xmlXPathFreeObject(list);
595  return(0);
596  }
597  /* TODO: store the index and use it for the scan */
598  if (ix == 0) {
599  for (j = 0;j < list->nodesetval->nodeNr;j++) {
600  if (list->nodesetval->nodeTab[j] == node) {
601  if (nocache == 1)
602  xmlXPathFreeObject(list);
603  return(1);
604  }
605  }
606  } else {
607  }
608  if (nocache == 1)
609  xmlXPathFreeObject(list);
610  return(0);
611 }
612 
625 static int
626 xsltTestPredicateMatch(xsltTransformContextPtr ctxt, xsltCompMatchPtr comp,
627  xmlNodePtr node, xsltStepOpPtr step,
628  xsltStepOpPtr sel) {
629  xmlNodePtr oldNode;
630  xmlDocPtr doc;
631  int oldCS, oldCP;
632  int pos = 0, len = 0;
633  int isRVT;
634  int match;
635 
636  if (step->value == NULL)
637  return(0);
638  if (step->comp == NULL)
639  return(0);
640 
641  doc = node->doc;
642  if (XSLT_IS_RES_TREE_FRAG(doc))
643  isRVT = 1;
644  else
645  isRVT = 0;
646 
647  /*
648  * Recompute contextSize and proximityPosition.
649  *
650  * TODO: Make this work for additional ops. Currently, only XSLT_OP_ELEM
651  * and XSLT_OP_ALL are supported.
652  */
653  oldCS = ctxt->xpathCtxt->contextSize;
654  oldCP = ctxt->xpathCtxt->proximityPosition;
655  if ((sel != NULL) &&
656  (sel->op == XSLT_OP_ELEM) &&
657  (sel->value != NULL) &&
658  (node->type == XML_ELEMENT_NODE) &&
659  (node->parent != NULL)) {
660  xmlNodePtr previous;
661  int nocache = 0;
662 
663  previous = (xmlNodePtr)
664  XSLT_RUNTIME_EXTRA(ctxt, sel->previousExtra, ptr);
665  if ((previous != NULL) &&
666  (previous->parent == node->parent)) {
667  /*
668  * just walk back to adjust the index
669  */
670  int indx = 0;
671  xmlNodePtr sibling = node;
672 
673  while (sibling != NULL) {
674  if (sibling == previous)
675  break;
676  if ((sibling->type == XML_ELEMENT_NODE) &&
677  (previous->name != NULL) &&
678  (sibling->name != NULL) &&
679  (previous->name[0] == sibling->name[0]) &&
680  (xmlStrEqual(previous->name, sibling->name)))
681  {
682  if ((sel->value2 == NULL) ||
683  ((sibling->ns != NULL) &&
684  (xmlStrEqual(sel->value2, sibling->ns->href))))
685  indx++;
686  }
687  sibling = sibling->prev;
688  }
689  if (sibling == NULL) {
690  /* hum going backward in document order ... */
691  indx = 0;
692  sibling = node;
693  while (sibling != NULL) {
694  if (sibling == previous)
695  break;
696  if ((sibling->type == XML_ELEMENT_NODE) &&
697  (previous->name != NULL) &&
698  (sibling->name != NULL) &&
699  (previous->name[0] == sibling->name[0]) &&
700  (xmlStrEqual(previous->name, sibling->name)))
701  {
702  if ((sel->value2 == NULL) ||
703  ((sibling->ns != NULL) &&
704  (xmlStrEqual(sel->value2,
705  sibling->ns->href))))
706  {
707  indx--;
708  }
709  }
710  sibling = sibling->next;
711  }
712  }
713  if (sibling != NULL) {
714  pos = XSLT_RUNTIME_EXTRA(ctxt, sel->indexExtra, ival) + indx;
715  /*
716  * If the node is in a Value Tree we need to
717  * save len, but cannot cache the node!
718  * (bugs 153137 and 158840)
719  */
720  if (node->doc != NULL) {
721  len = XSLT_RUNTIME_EXTRA(ctxt, sel->lenExtra, ival);
722  if (!isRVT) {
723  XSLT_RUNTIME_EXTRA(ctxt,
724  sel->previousExtra, ptr) = node;
725  XSLT_RUNTIME_EXTRA(ctxt, sel->indexExtra, ival) = pos;
726  }
727  }
728  } else
729  pos = 0;
730  } else {
731  /*
732  * recompute the index
733  */
734  xmlNodePtr parent = node->parent;
735  xmlNodePtr siblings = NULL;
736 
737  if (parent) siblings = parent->children;
738 
739  while (siblings != NULL) {
740  if (siblings->type == XML_ELEMENT_NODE) {
741  if (siblings == node) {
742  len++;
743  pos = len;
744  } else if ((node->name != NULL) &&
745  (siblings->name != NULL) &&
746  (node->name[0] == siblings->name[0]) &&
747  (xmlStrEqual(node->name, siblings->name))) {
748  if ((sel->value2 == NULL) ||
749  ((siblings->ns != NULL) &&
750  (xmlStrEqual(sel->value2, siblings->ns->href))))
751  len++;
752  }
753  }
754  siblings = siblings->next;
755  }
756  if ((parent == NULL) || (node->doc == NULL))
757  nocache = 1;
758  else {
759  while (parent->parent != NULL)
760  parent = parent->parent;
761  if (((parent->type != XML_DOCUMENT_NODE) &&
762  (parent->type != XML_HTML_DOCUMENT_NODE)) ||
763  (parent != (xmlNodePtr) node->doc))
764  nocache = 1;
765  }
766  }
767  if (pos != 0) {
768  ctxt->xpathCtxt->contextSize = len;
769  ctxt->xpathCtxt->proximityPosition = pos;
770  /*
771  * If the node is in a Value Tree we cannot
772  * cache it !
773  */
774  if ((!isRVT) && (node->doc != NULL) &&
775  (nocache == 0)) {
776  XSLT_RUNTIME_EXTRA(ctxt, sel->previousExtra, ptr) = node;
777  XSLT_RUNTIME_EXTRA(ctxt, sel->indexExtra, ival) = pos;
778  XSLT_RUNTIME_EXTRA(ctxt, sel->lenExtra, ival) = len;
779  }
780  }
781  } else if ((sel != NULL) && (sel->op == XSLT_OP_ALL) &&
782  (node->type == XML_ELEMENT_NODE)) {
783  xmlNodePtr previous;
784  int nocache = 0;
785 
786  previous = (xmlNodePtr)
787  XSLT_RUNTIME_EXTRA(ctxt, sel->previousExtra, ptr);
788  if ((previous != NULL) &&
789  (previous->parent == node->parent)) {
790  /*
791  * just walk back to adjust the index
792  */
793  int indx = 0;
794  xmlNodePtr sibling = node;
795 
796  while (sibling != NULL) {
797  if (sibling == previous)
798  break;
799  if (sibling->type == XML_ELEMENT_NODE)
800  indx++;
801  sibling = sibling->prev;
802  }
803  if (sibling == NULL) {
804  /* hum going backward in document order ... */
805  indx = 0;
806  sibling = node;
807  while (sibling != NULL) {
808  if (sibling == previous)
809  break;
810  if (sibling->type == XML_ELEMENT_NODE)
811  indx--;
812  sibling = sibling->next;
813  }
814  }
815  if (sibling != NULL) {
816  pos = XSLT_RUNTIME_EXTRA(ctxt,
817  sel->indexExtra, ival) + indx;
818  /*
819  * If the node is in a Value Tree we cannot
820  * cache it !
821  */
822  if ((node->doc != NULL) && !isRVT) {
823  len = XSLT_RUNTIME_EXTRA(ctxt, sel->lenExtra, ival);
824  XSLT_RUNTIME_EXTRA(ctxt, sel->previousExtra, ptr) = node;
825  XSLT_RUNTIME_EXTRA(ctxt, sel->indexExtra, ival) = pos;
826  }
827  } else
828  pos = 0;
829  } else {
830  /*
831  * recompute the index
832  */
833  xmlNodePtr parent = node->parent;
834  xmlNodePtr siblings = NULL;
835 
836  if (parent) siblings = parent->children;
837 
838  while (siblings != NULL) {
839  if (siblings->type == XML_ELEMENT_NODE) {
840  len++;
841  if (siblings == node) {
842  pos = len;
843  }
844  }
845  siblings = siblings->next;
846  }
847  if ((parent == NULL) || (node->doc == NULL))
848  nocache = 1;
849  else {
850  while (parent->parent != NULL)
851  parent = parent->parent;
852  if (((parent->type != XML_DOCUMENT_NODE) &&
853  (parent->type != XML_HTML_DOCUMENT_NODE)) ||
854  (parent != (xmlNodePtr) node->doc))
855  nocache = 1;
856  }
857  }
858  if (pos != 0) {
859  ctxt->xpathCtxt->contextSize = len;
860  ctxt->xpathCtxt->proximityPosition = pos;
861  /*
862  * If the node is in a Value Tree we cannot
863  * cache it !
864  */
865  if ((node->doc != NULL) && (nocache == 0) && !isRVT) {
866  XSLT_RUNTIME_EXTRA(ctxt, sel->previousExtra, ptr) = node;
867  XSLT_RUNTIME_EXTRA(ctxt, sel->indexExtra, ival) = pos;
868  XSLT_RUNTIME_EXTRA(ctxt, sel->lenExtra, ival) = len;
869  }
870  }
871  }
872 
873  oldNode = ctxt->node;
874  ctxt->node = node;
875 
876  match = xsltEvalXPathPredicate(ctxt, step->comp, comp->nsList, comp->nsNr);
877 
878  if (pos != 0) {
879  ctxt->xpathCtxt->contextSize = oldCS;
880  ctxt->xpathCtxt->proximityPosition = oldCP;
881  }
882  ctxt->node = oldNode;
883 
884  return match;
885 }
886 
899 static int
900 xsltTestCompMatch(xsltTransformContextPtr ctxt, xsltCompMatchPtr comp,
901  xmlNodePtr matchNode, const xmlChar *mode,
902  const xmlChar *modeURI) {
903  int i;
904  int found = 0;
905  xmlNodePtr node = matchNode;
906  xmlNodePtr oldInst;
907  xsltStepOpPtr step, sel = NULL;
908  xsltStepStates states = {0, 0, NULL}; /* // may require backtrack */
909 
910  if ((comp == NULL) || (node == NULL) || (ctxt == NULL)) {
911  xsltTransformError(ctxt, NULL, node,
912  "xsltTestCompMatch: null arg\n");
913  return(-1);
914  }
915  if (mode != NULL) {
916  if (comp->mode == NULL)
917  return(0);
918  /*
919  * both mode strings must be interned on the stylesheet dictionary
920  */
921  if (comp->mode != mode)
922  return(0);
923  } else {
924  if (comp->mode != NULL)
925  return(0);
926  }
927  if (modeURI != NULL) {
928  if (comp->modeURI == NULL)
929  return(0);
930  /*
931  * both modeURI strings must be interned on the stylesheet dictionary
932  */
933  if (comp->modeURI != modeURI)
934  return(0);
935  } else {
936  if (comp->modeURI != NULL)
937  return(0);
938  }
939 
940  /* Some XPath functions rely on inst being set correctly. */
941  oldInst = ctxt->inst;
942  ctxt->inst = comp->node;
943 
944  i = 0;
945 restart:
946  for (;i < comp->nbStep;i++) {
947  step = &comp->steps[i];
948  if (step->op != XSLT_OP_PREDICATE)
949  sel = step;
950  switch (step->op) {
951  case XSLT_OP_END:
952  goto found;
953  case XSLT_OP_ROOT:
954  if ((node->type == XML_DOCUMENT_NODE) ||
955 #ifdef LIBXML_DOCB_ENABLED
956  (node->type == XML_DOCB_DOCUMENT_NODE) ||
957 #endif
958  (node->type == XML_HTML_DOCUMENT_NODE))
959  continue;
960  if ((node->type == XML_ELEMENT_NODE) && (node->name[0] == ' '))
961  continue;
962  goto rollback;
963  case XSLT_OP_ELEM:
964  if (node->type != XML_ELEMENT_NODE)
965  goto rollback;
966  if (step->value == NULL)
967  continue;
968  if (step->value[0] != node->name[0])
969  goto rollback;
970  if (!xmlStrEqual(step->value, node->name))
971  goto rollback;
972 
973  /* Namespace test */
974  if (node->ns == NULL) {
975  if (step->value2 != NULL)
976  goto rollback;
977  } else if (node->ns->href != NULL) {
978  if (step->value2 == NULL)
979  goto rollback;
980  if (!xmlStrEqual(step->value2, node->ns->href))
981  goto rollback;
982  }
983  continue;
984  case XSLT_OP_ATTR:
985  if (node->type != XML_ATTRIBUTE_NODE)
986  goto rollback;
987  if (step->value != NULL) {
988  if (step->value[0] != node->name[0])
989  goto rollback;
990  if (!xmlStrEqual(step->value, node->name))
991  goto rollback;
992  }
993  /* Namespace test */
994  if (node->ns == NULL) {
995  if (step->value2 != NULL)
996  goto rollback;
997  } else if (step->value2 != NULL) {
998  if (!xmlStrEqual(step->value2, node->ns->href))
999  goto rollback;
1000  }
1001  continue;
1002  case XSLT_OP_PARENT:
1003  if ((node->type == XML_DOCUMENT_NODE) ||
1004  (node->type == XML_HTML_DOCUMENT_NODE) ||
1005 #ifdef LIBXML_DOCB_ENABLED
1006  (node->type == XML_DOCB_DOCUMENT_NODE) ||
1007 #endif
1008  (node->type == XML_NAMESPACE_DECL))
1009  goto rollback;
1010  node = node->parent;
1011  if (node == NULL)
1012  goto rollback;
1013  if (step->value == NULL)
1014  continue;
1015  if (step->value[0] != node->name[0])
1016  goto rollback;
1017  if (!xmlStrEqual(step->value, node->name))
1018  goto rollback;
1019  /* Namespace test */
1020  if (node->ns == NULL) {
1021  if (step->value2 != NULL)
1022  goto rollback;
1023  } else if (node->ns->href != NULL) {
1024  if (step->value2 == NULL)
1025  goto rollback;
1026  if (!xmlStrEqual(step->value2, node->ns->href))
1027  goto rollback;
1028  }
1029  continue;
1030  case XSLT_OP_ANCESTOR:
1031  /* TODO: implement coalescing of ANCESTOR/NODE ops */
1032  if (step->value == NULL) {
1033  step = &comp->steps[i+1];
1034  if (step->op == XSLT_OP_ROOT)
1035  goto found;
1036  /* added NS, ID and KEY as a result of bug 168208 */
1037  if ((step->op != XSLT_OP_ELEM) &&
1038  (step->op != XSLT_OP_ALL) &&
1039  (step->op != XSLT_OP_NS) &&
1040  (step->op != XSLT_OP_ID) &&
1041  (step->op != XSLT_OP_KEY))
1042  goto rollback;
1043  }
1044  if (node == NULL)
1045  goto rollback;
1046  if ((node->type == XML_DOCUMENT_NODE) ||
1047  (node->type == XML_HTML_DOCUMENT_NODE) ||
1048 #ifdef LIBXML_DOCB_ENABLED
1049  (node->type == XML_DOCB_DOCUMENT_NODE) ||
1050 #endif
1051  (node->type == XML_NAMESPACE_DECL))
1052  goto rollback;
1053  node = node->parent;
1054  if ((step->op != XSLT_OP_ELEM) && step->op != XSLT_OP_ALL) {
1055  xsltPatPushState(ctxt, &states, i, node);
1056  continue;
1057  }
1058  i++;
1059  if (step->value == NULL) {
1060  xsltPatPushState(ctxt, &states, i - 1, node);
1061  continue;
1062  }
1063  while (node != NULL) {
1064  if ((node->type == XML_ELEMENT_NODE) &&
1065  (step->value[0] == node->name[0]) &&
1066  (xmlStrEqual(step->value, node->name))) {
1067  /* Namespace test */
1068  if (node->ns == NULL) {
1069  if (step->value2 == NULL)
1070  break;
1071  } else if (node->ns->href != NULL) {
1072  if ((step->value2 != NULL) &&
1073  (xmlStrEqual(step->value2, node->ns->href)))
1074  break;
1075  }
1076  }
1077  node = node->parent;
1078  }
1079  if (node == NULL)
1080  goto rollback;
1081  xsltPatPushState(ctxt, &states, i - 1, node);
1082  continue;
1083  case XSLT_OP_ID: {
1084  /* TODO Handle IDs decently, must be done differently */
1085  xmlAttrPtr id;
1086 
1087  if (node->type != XML_ELEMENT_NODE)
1088  goto rollback;
1089 
1090  id = xmlGetID(node->doc, step->value);
1091  if ((id == NULL) || (id->parent != node))
1092  goto rollback;
1093  break;
1094  }
1095  case XSLT_OP_KEY: {
1096  xmlNodeSetPtr list;
1097  int indx;
1098 
1099  list = xsltGetKey(ctxt, step->value,
1100  step->value3, step->value2);
1101  if (list == NULL)
1102  goto rollback;
1103  for (indx = 0;indx < list->nodeNr;indx++)
1104  if (list->nodeTab[indx] == node)
1105  break;
1106  if (indx >= list->nodeNr)
1107  goto rollback;
1108  break;
1109  }
1110  case XSLT_OP_NS:
1111  if (node->type != XML_ELEMENT_NODE)
1112  goto rollback;
1113  if (node->ns == NULL) {
1114  if (step->value != NULL)
1115  goto rollback;
1116  } else if (node->ns->href != NULL) {
1117  if (step->value == NULL)
1118  goto rollback;
1119  if (!xmlStrEqual(step->value, node->ns->href))
1120  goto rollback;
1121  }
1122  break;
1123  case XSLT_OP_ALL:
1124  if (node->type != XML_ELEMENT_NODE)
1125  goto rollback;
1126  break;
1127  case XSLT_OP_PREDICATE: {
1128  /*
1129  * When there is cascading XSLT_OP_PREDICATE or a predicate
1130  * after an op which hasn't been optimized yet, then use a
1131  * direct computation approach. It's not done directly
1132  * at the beginning of the routine to filter out as much
1133  * as possible this costly computation.
1134  */
1135  if (comp->direct) {
1136  found = xsltTestCompMatchDirect(ctxt, comp, matchNode,
1137  comp->nsList, comp->nsNr);
1138  goto exit;
1139  }
1140 
1141  if (!xsltTestPredicateMatch(ctxt, comp, node, step, sel))
1142  goto rollback;
1143 
1144  break;
1145  }
1146  case XSLT_OP_PI:
1147  if (node->type != XML_PI_NODE)
1148  goto rollback;
1149  if (step->value != NULL) {
1150  if (!xmlStrEqual(step->value, node->name))
1151  goto rollback;
1152  }
1153  break;
1154  case XSLT_OP_COMMENT:
1155  if (node->type != XML_COMMENT_NODE)
1156  goto rollback;
1157  break;
1158  case XSLT_OP_TEXT:
1159  if ((node->type != XML_TEXT_NODE) &&
1160  (node->type != XML_CDATA_SECTION_NODE))
1161  goto rollback;
1162  break;
1163  case XSLT_OP_NODE:
1164  switch (node->type) {
1165  case XML_ELEMENT_NODE:
1166  case XML_CDATA_SECTION_NODE:
1167  case XML_PI_NODE:
1168  case XML_COMMENT_NODE:
1169  case XML_TEXT_NODE:
1170  break;
1171  default:
1172  goto rollback;
1173  }
1174  break;
1175  }
1176  }
1177 found:
1178  found = 1;
1179 exit:
1180  ctxt->inst = oldInst;
1181  if (states.states != NULL) {
1182  /* Free the rollback states */
1183  xmlFree(states.states);
1184  }
1185  return found;
1186 rollback:
1187  /* got an error try to rollback */
1188  if (states.states == NULL || states.nbstates <= 0) {
1189  found = 0;
1190  goto exit;
1191  }
1192  states.nbstates--;
1193  i = states.states[states.nbstates].step;
1194  node = states.states[states.nbstates].node;
1195 #if 0
1196  fprintf(stderr, "Pop: %d, %s\n", i, node->name);
1197 #endif
1198  goto restart;
1199 }
1200 
1211 int
1212 xsltTestCompMatchList(xsltTransformContextPtr ctxt, xmlNodePtr node,
1213  xsltCompMatchPtr comp) {
1214  int ret;
1215 
1216  if ((ctxt == NULL) || (node == NULL))
1217  return(-1);
1218  while (comp != NULL) {
1219  ret = xsltTestCompMatch(ctxt, comp, node, NULL, NULL);
1220  if (ret == 1)
1221  return(1);
1222  comp = comp->next;
1223  }
1224  return(0);
1225 }
1226 
1234 void
1235 xsltCompMatchClearCache(xsltTransformContextPtr ctxt, xsltCompMatchPtr comp) {
1236  xsltStepOpPtr sel;
1237  xmlXPathObjectPtr list;
1238 
1239  if ((ctxt == NULL) || (comp == NULL))
1240  return;
1241 
1242  sel = &comp->steps[0];
1243  list = (xmlXPathObjectPtr) XSLT_RUNTIME_EXTRA_LST(ctxt, sel->lenExtra);
1244 
1245  if (list != NULL) {
1246  xmlXPathFreeObject(list);
1247 
1248  XSLT_RUNTIME_EXTRA_LST(ctxt, sel->lenExtra) = NULL;
1249  XSLT_RUNTIME_EXTRA(ctxt, sel->previousExtra, ptr) = NULL;
1250  XSLT_RUNTIME_EXTRA(ctxt, sel->indexExtra, ival) = 0;
1251  XSLT_RUNTIME_EXTRA_FREE(ctxt, sel->lenExtra) = NULL;
1252  }
1253 }
1254 
1255 /************************************************************************
1256  * *
1257  * Dedicated parser for templates *
1258  * *
1259  ************************************************************************/
1260 
1261 #define CUR (*ctxt->cur)
1262 #define SKIP(val) ctxt->cur += (val)
1263 #define NXT(val) ctxt->cur[(val)]
1264 #define CUR_PTR ctxt->cur
1265 
1266 #define SKIP_BLANKS \
1267  while (IS_BLANK_CH(CUR)) NEXT
1268 
1269 #define CURRENT (*ctxt->cur)
1270 #define NEXT ((*ctxt->cur) ? ctxt->cur++: ctxt->cur)
1271 
1272 
1273 #define PUSH(op, val, val2, novar) \
1274  if (xsltCompMatchAdd(ctxt, ctxt->comp, (op), (val), (val2), (novar))) goto error;
1275 
1276 #define SWAP() \
1277  xsltSwapTopCompMatch(ctxt->comp);
1278 
1279 #define XSLT_ERROR(X) \
1280  { xsltError(ctxt, __FILE__, __LINE__, X); \
1281  ctxt->error = (X); return; }
1282 
1283 #define XSLT_ERROR0(X) \
1284  { xsltError(ctxt, __FILE__, __LINE__, X); \
1285  ctxt->error = (X); return(0); }
1286 
1299 static xmlChar *
1300 xsltScanLiteral(xsltParserContextPtr ctxt) {
1301  const xmlChar *q, *cur;
1302  xmlChar *ret = NULL;
1303  int val, len;
1304 
1305  SKIP_BLANKS;
1306  if (CUR == '"') {
1307  NEXT;
1308  cur = q = CUR_PTR;
1309  val = xmlStringCurrentChar(NULL, cur, &len);
1310  while ((IS_CHAR(val)) && (val != '"')) {
1311  cur += len;
1312  val = xmlStringCurrentChar(NULL, cur, &len);
1313  }
1314  if (!IS_CHAR(val)) {
1315  ctxt->error = 1;
1316  return(NULL);
1317  } else {
1318  ret = xmlStrndup(q, cur - q);
1319  }
1320  cur += len;
1321  CUR_PTR = cur;
1322  } else if (CUR == '\'') {
1323  NEXT;
1324  cur = q = CUR_PTR;
1325  val = xmlStringCurrentChar(NULL, cur, &len);
1326  while ((IS_CHAR(val)) && (val != '\'')) {
1327  cur += len;
1328  val = xmlStringCurrentChar(NULL, cur, &len);
1329  }
1330  if (!IS_CHAR(val)) {
1331  ctxt->error = 1;
1332  return(NULL);
1333  } else {
1334  ret = xmlStrndup(q, cur - q);
1335  }
1336  cur += len;
1337  CUR_PTR = cur;
1338  } else {
1339  /* XP_ERROR(XPATH_START_LITERAL_ERROR); */
1340  ctxt->error = 1;
1341  return(NULL);
1342  }
1343  return(ret);
1344 }
1345 
1355 static xmlChar *
1356 xsltScanNCName(xsltParserContextPtr ctxt) {
1357  const xmlChar *q, *cur;
1358  xmlChar *ret = NULL;
1359  int val, len;
1360 
1361  SKIP_BLANKS;
1362 
1363  cur = q = CUR_PTR;
1364  val = xmlStringCurrentChar(NULL, cur, &len);
1365  if (!IS_LETTER(val) && (val != '_'))
1366  return(NULL);
1367 
1368  while ((IS_LETTER(val)) || (IS_DIGIT(val)) ||
1369  (val == '.') || (val == '-') ||
1370  (val == '_') ||
1371  (IS_COMBINING(val)) ||
1372  (IS_EXTENDER(val))) {
1373  cur += len;
1374  val = xmlStringCurrentChar(NULL, cur, &len);
1375  }
1376  ret = xmlStrndup(q, cur - q);
1377  CUR_PTR = cur;
1378  return(ret);
1379 }
1380 
1381 /*
1382  * xsltCompileIdKeyPattern:
1383  * @ctxt: the compilation context
1384  * @name: a preparsed name
1385  * @aid: whether id/key are allowed there
1386  * @novar: flag to prohibit xslt var
1387  *
1388  * Compile the XSLT LocationIdKeyPattern
1389  * [3] IdKeyPattern ::= 'id' '(' Literal ')'
1390  * | 'key' '(' Literal ',' Literal ')'
1391  *
1392  * also handle NodeType and PI from:
1393  *
1394  * [7] NodeTest ::= NameTest
1395  * | NodeType '(' ')'
1396  * | 'processing-instruction' '(' Literal ')'
1397  */
1398 static void
1399 xsltCompileIdKeyPattern(xsltParserContextPtr ctxt, xmlChar *name,
1400  int aid, int novar, xsltAxis axis) {
1401  xmlChar *lit = NULL;
1402  xmlChar *lit2 = NULL;
1403 
1404  if (CUR != '(') {
1405  xsltTransformError(NULL, NULL, NULL,
1406  "xsltCompileIdKeyPattern : ( expected\n");
1407  ctxt->error = 1;
1408  return;
1409  }
1410  if ((aid) && (xmlStrEqual(name, (const xmlChar *)"id"))) {
1411  if (axis != 0) {
1412  xsltTransformError(NULL, NULL, NULL,
1413  "xsltCompileIdKeyPattern : NodeTest expected\n");
1414  ctxt->error = 1;
1415  return;
1416  }
1417  NEXT;
1418  SKIP_BLANKS;
1419  lit = xsltScanLiteral(ctxt);
1420  if (ctxt->error) {
1421  xsltTransformError(NULL, NULL, NULL,
1422  "xsltCompileIdKeyPattern : Literal expected\n");
1423  return;
1424  }
1425  SKIP_BLANKS;
1426  if (CUR != ')') {
1427  xsltTransformError(NULL, NULL, NULL,
1428  "xsltCompileIdKeyPattern : ) expected\n");
1429  xmlFree(lit);
1430  ctxt->error = 1;
1431  return;
1432  }
1433  NEXT;
1434  PUSH(XSLT_OP_ID, lit, NULL, novar);
1435  lit = NULL;
1436  } else if ((aid) && (xmlStrEqual(name, (const xmlChar *)"key"))) {
1437  if (axis != 0) {
1438  xsltTransformError(NULL, NULL, NULL,
1439  "xsltCompileIdKeyPattern : NodeTest expected\n");
1440  ctxt->error = 1;
1441  return;
1442  }
1443  NEXT;
1444  SKIP_BLANKS;
1445  lit = xsltScanLiteral(ctxt);
1446  if (ctxt->error) {
1447  xsltTransformError(NULL, NULL, NULL,
1448  "xsltCompileIdKeyPattern : Literal expected\n");
1449  return;
1450  }
1451  SKIP_BLANKS;
1452  if (CUR != ',') {
1453  xsltTransformError(NULL, NULL, NULL,
1454  "xsltCompileIdKeyPattern : , expected\n");
1455  xmlFree(lit);
1456  ctxt->error = 1;
1457  return;
1458  }
1459  NEXT;
1460  SKIP_BLANKS;
1461  lit2 = xsltScanLiteral(ctxt);
1462  if (ctxt->error) {
1463  xsltTransformError(NULL, NULL, NULL,
1464  "xsltCompileIdKeyPattern : Literal expected\n");
1465  xmlFree(lit);
1466  return;
1467  }
1468  SKIP_BLANKS;
1469  if (CUR != ')') {
1470  xsltTransformError(NULL, NULL, NULL,
1471  "xsltCompileIdKeyPattern : ) expected\n");
1472  xmlFree(lit);
1473  xmlFree(lit2);
1474  ctxt->error = 1;
1475  return;
1476  }
1477  NEXT;
1478  /* URGENT TODO: support namespace in keys */
1479  PUSH(XSLT_OP_KEY, lit, lit2, novar);
1480  lit = NULL;
1481  lit2 = NULL;
1482  } else if (xmlStrEqual(name, (const xmlChar *)"processing-instruction")) {
1483  NEXT;
1484  SKIP_BLANKS;
1485  if (CUR != ')') {
1486  lit = xsltScanLiteral(ctxt);
1487  if (ctxt->error) {
1488  xsltTransformError(NULL, NULL, NULL,
1489  "xsltCompileIdKeyPattern : Literal expected\n");
1490  return;
1491  }
1492  SKIP_BLANKS;
1493  if (CUR != ')') {
1494  xsltTransformError(NULL, NULL, NULL,
1495  "xsltCompileIdKeyPattern : ) expected\n");
1496  ctxt->error = 1;
1497  xmlFree(lit);
1498  return;
1499  }
1500  }
1501  NEXT;
1502  PUSH(XSLT_OP_PI, lit, NULL, novar);
1503  lit = NULL;
1504  } else if (xmlStrEqual(name, (const xmlChar *)"text")) {
1505  NEXT;
1506  SKIP_BLANKS;
1507  if (CUR != ')') {
1508  xsltTransformError(NULL, NULL, NULL,
1509  "xsltCompileIdKeyPattern : ) expected\n");
1510  ctxt->error = 1;
1511  return;
1512  }
1513  NEXT;
1514  PUSH(XSLT_OP_TEXT, NULL, NULL, novar);
1515  } else if (xmlStrEqual(name, (const xmlChar *)"comment")) {
1516  NEXT;
1517  SKIP_BLANKS;
1518  if (CUR != ')') {
1519  xsltTransformError(NULL, NULL, NULL,
1520  "xsltCompileIdKeyPattern : ) expected\n");
1521  ctxt->error = 1;
1522  return;
1523  }
1524  NEXT;
1525  PUSH(XSLT_OP_COMMENT, NULL, NULL, novar);
1526  } else if (xmlStrEqual(name, (const xmlChar *)"node")) {
1527  NEXT;
1528  SKIP_BLANKS;
1529  if (CUR != ')') {
1530  xsltTransformError(NULL, NULL, NULL,
1531  "xsltCompileIdKeyPattern : ) expected\n");
1532  ctxt->error = 1;
1533  return;
1534  }
1535  NEXT;
1536  if (axis == AXIS_ATTRIBUTE) {
1537  PUSH(XSLT_OP_ATTR, NULL, NULL, novar);
1538  }
1539  else {
1540  PUSH(XSLT_OP_NODE, NULL, NULL, novar);
1541  }
1542  } else if (aid) {
1543  xsltTransformError(NULL, NULL, NULL,
1544  "xsltCompileIdKeyPattern : expecting 'key' or 'id' or node type\n");
1545  ctxt->error = 1;
1546  return;
1547  } else {
1548  xsltTransformError(NULL, NULL, NULL,
1549  "xsltCompileIdKeyPattern : node type\n");
1550  ctxt->error = 1;
1551  return;
1552  }
1553 error:
1554  return;
1555 }
1556 
1579 static void
1580 xsltCompileStepPattern(xsltParserContextPtr ctxt, xmlChar *token, int novar) {
1581  xmlChar *name = NULL;
1582  const xmlChar *URI = NULL;
1583  xmlChar *URL = NULL;
1584  int level;
1585  xsltAxis axis = 0;
1586 
1587  SKIP_BLANKS;
1588  if ((token == NULL) && (CUR == '@')) {
1589  NEXT;
1590  axis = AXIS_ATTRIBUTE;
1591  }
1592 parse_node_test:
1593  if (token == NULL)
1594  token = xsltScanNCName(ctxt);
1595  if (token == NULL) {
1596  if (CUR == '*') {
1597  NEXT;
1598  if (axis == AXIS_ATTRIBUTE) {
1599  PUSH(XSLT_OP_ATTR, NULL, NULL, novar);
1600  }
1601  else {
1602  PUSH(XSLT_OP_ALL, NULL, NULL, novar);
1603  }
1604  goto parse_predicate;
1605  } else {
1606  xsltTransformError(NULL, NULL, NULL,
1607  "xsltCompileStepPattern : Name expected\n");
1608  ctxt->error = 1;
1609  goto error;
1610  }
1611  }
1612 
1613 
1614  SKIP_BLANKS;
1615  if (CUR == '(') {
1616  xsltCompileIdKeyPattern(ctxt, token, 0, novar, axis);
1617  xmlFree(token);
1618  token = NULL;
1619  if (ctxt->error)
1620  goto error;
1621  } else if (CUR == ':') {
1622  NEXT;
1623  if (CUR != ':') {
1624  xmlChar *prefix = token;
1625  xmlNsPtr ns;
1626 
1627  /*
1628  * This is a namespace match
1629  */
1630  token = xsltScanNCName(ctxt);
1631  ns = xmlSearchNs(ctxt->doc, ctxt->elem, prefix);
1632  if (ns == NULL) {
1633  xsltTransformError(NULL, NULL, NULL,
1634  "xsltCompileStepPattern : no namespace bound to prefix %s\n",
1635  prefix);
1636  xmlFree(prefix);
1637  prefix=NULL;
1638  ctxt->error = 1;
1639  goto error;
1640  } else {
1641  URL = xmlStrdup(ns->href);
1642  }
1643  xmlFree(prefix);
1644  prefix=NULL;
1645  if (token == NULL) {
1646  if (CUR == '*') {
1647  NEXT;
1648  if (axis == AXIS_ATTRIBUTE) {
1649  PUSH(XSLT_OP_ATTR, NULL, URL, novar);
1650  URL = NULL;
1651  }
1652  else {
1653  PUSH(XSLT_OP_NS, URL, NULL, novar);
1654  URL = NULL;
1655  }
1656  } else {
1657  xsltTransformError(NULL, NULL, NULL,
1658  "xsltCompileStepPattern : Name expected\n");
1659  ctxt->error = 1;
1660  xmlFree(URL);
1661  goto error;
1662  }
1663  } else {
1664  if (axis == AXIS_ATTRIBUTE) {
1665  PUSH(XSLT_OP_ATTR, token, URL, novar);
1666  token = NULL;
1667  URL = NULL;
1668  }
1669  else {
1670  PUSH(XSLT_OP_ELEM, token, URL, novar);
1671  token = NULL;
1672  URL = NULL;
1673  }
1674  }
1675  } else {
1676  if (axis != 0) {
1677  xsltTransformError(NULL, NULL, NULL,
1678  "xsltCompileStepPattern : NodeTest expected\n");
1679  ctxt->error = 1;
1680  goto error;
1681  }
1682  NEXT;
1683  if (xmlStrEqual(token, (const xmlChar *) "child")) {
1684  axis = AXIS_CHILD;
1685  } else if (xmlStrEqual(token, (const xmlChar *) "attribute")) {
1686  axis = AXIS_ATTRIBUTE;
1687  } else {
1688  xsltTransformError(NULL, NULL, NULL,
1689  "xsltCompileStepPattern : 'child' or 'attribute' expected\n");
1690  ctxt->error = 1;
1691  goto error;
1692  }
1693  xmlFree(token);
1694  token = NULL;
1695  SKIP_BLANKS;
1696  token = xsltScanNCName(ctxt);
1697  goto parse_node_test;
1698  }
1699  } else {
1700  URI = xsltGetQNameURI(ctxt->elem, &token);
1701  if (token == NULL) {
1702  ctxt->error = 1;
1703  goto error;
1704  }
1705  if (URI != NULL)
1706  URL = xmlStrdup(URI);
1707  if (axis == AXIS_ATTRIBUTE) {
1708  PUSH(XSLT_OP_ATTR, token, URL, novar);
1709  token = NULL;
1710  URL = NULL;
1711  }
1712  else {
1713  PUSH(XSLT_OP_ELEM, token, URL, novar);
1714  token = NULL;
1715  URL = NULL;
1716  }
1717  }
1718 parse_predicate:
1719  SKIP_BLANKS;
1720  level = 0;
1721  while (CUR == '[') {
1722  const xmlChar *q;
1723  xmlChar *ret = NULL;
1724 
1725  level++;
1726  NEXT;
1727  q = CUR_PTR;
1728  while (CUR != 0) {
1729  /* Skip over nested predicates */
1730  if (CUR == '[')
1731  level++;
1732  else if (CUR == ']') {
1733  level--;
1734  if (level == 0)
1735  break;
1736  } else if (CUR == '"') {
1737  NEXT;
1738  while ((CUR != 0) && (CUR != '"'))
1739  NEXT;
1740  } else if (CUR == '\'') {
1741  NEXT;
1742  while ((CUR != 0) && (CUR != '\''))
1743  NEXT;
1744  }
1745  NEXT;
1746  }
1747  if (CUR == 0) {
1748  xsltTransformError(NULL, NULL, NULL,
1749  "xsltCompileStepPattern : ']' expected\n");
1750  ctxt->error = 1;
1751  return;
1752  }
1753  ret = xmlStrndup(q, CUR_PTR - q);
1754  PUSH(XSLT_OP_PREDICATE, ret, NULL, novar);
1755  ret = NULL;
1756  /* push the predicate lower than local test */
1757  SWAP();
1758  NEXT;
1759  SKIP_BLANKS;
1760  }
1761  return;
1762 error:
1763  if (token != NULL)
1764  xmlFree(token);
1765  if (name != NULL)
1766  xmlFree(name);
1767 }
1768 
1782 static void
1783 xsltCompileRelativePathPattern(xsltParserContextPtr ctxt, xmlChar *token, int novar) {
1784  xsltCompileStepPattern(ctxt, token, novar);
1785  if (ctxt->error)
1786  goto error;
1787  SKIP_BLANKS;
1788  while ((CUR != 0) && (CUR != '|')) {
1789  if ((CUR == '/') && (NXT(1) == '/')) {
1790  PUSH(XSLT_OP_ANCESTOR, NULL, NULL, novar);
1791  NEXT;
1792  NEXT;
1793  SKIP_BLANKS;
1794  xsltCompileStepPattern(ctxt, NULL, novar);
1795  } else if (CUR == '/') {
1796  PUSH(XSLT_OP_PARENT, NULL, NULL, novar);
1797  NEXT;
1798  SKIP_BLANKS;
1799  xsltCompileStepPattern(ctxt, NULL, novar);
1800  } else {
1801  ctxt->error = 1;
1802  }
1803  if (ctxt->error)
1804  goto error;
1805  SKIP_BLANKS;
1806  }
1807 error:
1808  return;
1809 }
1810 
1823 static void
1824 xsltCompileLocationPathPattern(xsltParserContextPtr ctxt, int novar) {
1825  SKIP_BLANKS;
1826  if ((CUR == '/') && (NXT(1) == '/')) {
1827  /*
1828  * since we reverse the query
1829  * a leading // can be safely ignored
1830  */
1831  NEXT;
1832  NEXT;
1833  ctxt->comp->priority = 0.5; /* '//' means not 0 priority */
1834  xsltCompileRelativePathPattern(ctxt, NULL, novar);
1835  } else if (CUR == '/') {
1836  /*
1837  * We need to find root as the parent
1838  */
1839  NEXT;
1840  SKIP_BLANKS;
1841  PUSH(XSLT_OP_ROOT, NULL, NULL, novar);
1842  if ((CUR != 0) && (CUR != '|')) {
1843  PUSH(XSLT_OP_PARENT, NULL, NULL, novar);
1844  xsltCompileRelativePathPattern(ctxt, NULL, novar);
1845  }
1846  } else if (CUR == '*') {
1847  xsltCompileRelativePathPattern(ctxt, NULL, novar);
1848  } else if (CUR == '@') {
1849  xsltCompileRelativePathPattern(ctxt, NULL, novar);
1850  } else {
1851  xmlChar *name;
1852  name = xsltScanNCName(ctxt);
1853  if (name == NULL) {
1854  xsltTransformError(NULL, NULL, NULL,
1855  "xsltCompileLocationPathPattern : Name expected\n");
1856  ctxt->error = 1;
1857  return;
1858  }
1859  SKIP_BLANKS;
1860  if ((CUR == '(') && !xmlXPathIsNodeType(name)) {
1861  xsltCompileIdKeyPattern(ctxt, name, 1, novar, 0);
1862  xmlFree(name);
1863  name = NULL;
1864  if (ctxt->error)
1865  return;
1866  if ((CUR == '/') && (NXT(1) == '/')) {
1867  PUSH(XSLT_OP_ANCESTOR, NULL, NULL, novar);
1868  NEXT;
1869  NEXT;
1870  SKIP_BLANKS;
1871  xsltCompileRelativePathPattern(ctxt, NULL, novar);
1872  } else if (CUR == '/') {
1873  PUSH(XSLT_OP_PARENT, NULL, NULL, novar);
1874  NEXT;
1875  SKIP_BLANKS;
1876  xsltCompileRelativePathPattern(ctxt, NULL, novar);
1877  }
1878  return;
1879  }
1880  xsltCompileRelativePathPattern(ctxt, name, novar);
1881  }
1882 error:
1883  return;
1884 }
1885 
1903 static xsltCompMatchPtr
1904 xsltCompilePatternInternal(const xmlChar *pattern, xmlDocPtr doc,
1905  xmlNodePtr node, xsltStylesheetPtr style,
1906  xsltTransformContextPtr runtime, int novar) {
1907  xsltParserContextPtr ctxt = NULL;
1908  xsltCompMatchPtr element, first = NULL, previous = NULL;
1909  int current, start, end, level, j;
1910 
1911  if (pattern == NULL) {
1912  xsltTransformError(NULL, NULL, node,
1913  "xsltCompilePattern : NULL pattern\n");
1914  return(NULL);
1915  }
1916 
1917  ctxt = xsltNewParserContext(style, runtime);
1918  if (ctxt == NULL)
1919  return(NULL);
1920  ctxt->doc = doc;
1921  ctxt->elem = node;
1922  current = end = 0;
1923  while (pattern[current] != 0) {
1924  start = current;
1925  while (IS_BLANK_CH(pattern[current]))
1926  current++;
1927  end = current;
1928  level = 0;
1929  while ((pattern[end] != 0) && ((pattern[end] != '|') || (level != 0))) {
1930  if (pattern[end] == '[')
1931  level++;
1932  else if (pattern[end] == ']')
1933  level--;
1934  else if (pattern[end] == '\'') {
1935  end++;
1936  while ((pattern[end] != 0) && (pattern[end] != '\''))
1937  end++;
1938  } else if (pattern[end] == '"') {
1939  end++;
1940  while ((pattern[end] != 0) && (pattern[end] != '"'))
1941  end++;
1942  }
1943  if (pattern[end] == 0)
1944  break;
1945  end++;
1946  }
1947  if (current == end) {
1948  xsltTransformError(NULL, NULL, node,
1949  "xsltCompilePattern : NULL pattern\n");
1950  goto error;
1951  }
1952  element = xsltNewCompMatch();
1953  if (element == NULL) {
1954  goto error;
1955  }
1956  if (first == NULL)
1957  first = element;
1958  else if (previous != NULL)
1959  previous->next = element;
1960  previous = element;
1961 
1962  ctxt->comp = element;
1963  ctxt->base = xmlStrndup(&pattern[start], end - start);
1964  if (ctxt->base == NULL)
1965  goto error;
1966  ctxt->cur = &(ctxt->base)[current - start];
1967  element->pattern = ctxt->base;
1968  element->node = node;
1969  element->nsList = xmlGetNsList(doc, node);
1970  j = 0;
1971  if (element->nsList != NULL) {
1972  while (element->nsList[j] != NULL)
1973  j++;
1974  }
1975  element->nsNr = j;
1976 
1977 
1978 #ifdef WITH_XSLT_DEBUG_PATTERN
1979  xsltGenericDebug(xsltGenericDebugContext,
1980  "xsltCompilePattern : parsing '%s'\n",
1981  element->pattern);
1982 #endif
1983  /*
1984  Preset default priority to be zero.
1985  This may be changed by xsltCompileLocationPathPattern.
1986  */
1987  element->priority = 0;
1988  xsltCompileLocationPathPattern(ctxt, novar);
1989  if (ctxt->error) {
1990  xsltTransformError(NULL, style, node,
1991  "xsltCompilePattern : failed to compile '%s'\n",
1992  element->pattern);
1993  if (style != NULL) style->errors++;
1994  goto error;
1995  }
1996 
1997  /*
1998  * Reverse for faster interpretation.
1999  */
2000  xsltReverseCompMatch(ctxt, element);
2001 
2002  /*
2003  * Set-up the priority
2004  */
2005  if (element->priority == 0) { /* if not yet determined */
2006  if (((element->steps[0].op == XSLT_OP_ELEM) ||
2007  (element->steps[0].op == XSLT_OP_ATTR) ||
2008  (element->steps[0].op == XSLT_OP_PI)) &&
2009  (element->steps[0].value != NULL) &&
2010  (element->steps[1].op == XSLT_OP_END)) {
2011  ; /* previously preset */
2012  } else if ((element->steps[0].op == XSLT_OP_ATTR) &&
2013  (element->steps[0].value2 != NULL) &&
2014  (element->steps[1].op == XSLT_OP_END)) {
2015  element->priority = -0.25;
2016  } else if ((element->steps[0].op == XSLT_OP_NS) &&
2017  (element->steps[0].value != NULL) &&
2018  (element->steps[1].op == XSLT_OP_END)) {
2019  element->priority = -0.25;
2020  } else if ((element->steps[0].op == XSLT_OP_ATTR) &&
2021  (element->steps[0].value == NULL) &&
2022  (element->steps[0].value2 == NULL) &&
2023  (element->steps[1].op == XSLT_OP_END)) {
2024  element->priority = -0.5;
2025  } else if (((element->steps[0].op == XSLT_OP_PI) ||
2026  (element->steps[0].op == XSLT_OP_TEXT) ||
2027  (element->steps[0].op == XSLT_OP_ALL) ||
2028  (element->steps[0].op == XSLT_OP_NODE) ||
2029  (element->steps[0].op == XSLT_OP_COMMENT)) &&
2030  (element->steps[1].op == XSLT_OP_END)) {
2031  element->priority = -0.5;
2032  } else {
2033  element->priority = 0.5;
2034  }
2035  }
2036 #ifdef WITH_XSLT_DEBUG_PATTERN
2037  xsltGenericDebug(xsltGenericDebugContext,
2038  "xsltCompilePattern : parsed %s, default priority %f\n",
2039  element->pattern, element->priority);
2040 #endif
2041  if (pattern[end] == '|')
2042  end++;
2043  current = end;
2044  }
2045  if (end == 0) {
2046  xsltTransformError(NULL, style, node,
2047  "xsltCompilePattern : NULL pattern\n");
2048  if (style != NULL) style->errors++;
2049  goto error;
2050  }
2051 
2052  xsltFreeParserContext(ctxt);
2053  return(first);
2054 
2055 error:
2056  if (ctxt != NULL)
2057  xsltFreeParserContext(ctxt);
2058  if (first != NULL)
2059  xsltFreeCompMatchList(first);
2060  return(NULL);
2061 }
2062 
2079 xsltCompMatchPtr
2080 xsltCompilePattern(const xmlChar *pattern, xmlDocPtr doc,
2081  xmlNodePtr node, xsltStylesheetPtr style,
2082  xsltTransformContextPtr runtime) {
2083  return (xsltCompilePatternInternal(pattern, doc, node, style, runtime, 0));
2084 }
2085 
2086 /************************************************************************
2087  * *
2088  * Module interfaces *
2089  * *
2090  ************************************************************************/
2091 
2103 int
2104 xsltAddTemplate(xsltStylesheetPtr style, xsltTemplatePtr cur,
2105  const xmlChar *mode, const xmlChar *modeURI) {
2106  xsltCompMatchPtr pat, list, next;
2107  /*
2108  * 'top' will point to style->xxxMatch ptr - declaring as 'void'
2109  * avoids gcc 'type-punned pointer' warning.
2110  */
2111  void **top = NULL;
2112  const xmlChar *name = NULL;
2113  float priority; /* the priority */
2114 
2115  if ((style == NULL) || (cur == NULL))
2116  return(-1);
2117 
2118  /* Register named template */
2119  if (cur->name != NULL) {
2120  if (style->namedTemplates == NULL) {
2121  style->namedTemplates = xmlHashCreate(10);
2122  if (style->namedTemplates == NULL)
2123  return(-1);
2124  }
2125  else {
2126  void *dup = xmlHashLookup2(style->namedTemplates, cur->name,
2127  cur->nameURI);
2128  if (dup != NULL) {
2129  xsltTransformError(NULL, style, cur->elem,
2130  "xsl:template: error duplicate name '%s'\n",
2131  cur->name);
2132  style->errors++;
2133  return(-1);
2134  }
2135  }
2136 
2137  xmlHashAddEntry2(style->namedTemplates, cur->name, cur->nameURI, cur);
2138  }
2139 
2140  if (cur->match == NULL) {
2141  if (cur->name == NULL) {
2142  xsltTransformError(NULL, style, cur->elem,
2143  "xsl:template: need to specify match or name attribute\n");
2144  style->errors++;
2145  return(-1);
2146  }
2147  return(0);
2148  }
2149 
2150  priority = cur->priority;
2151  pat = xsltCompilePatternInternal(cur->match, style->doc, cur->elem,
2152  style, NULL, 1);
2153  if (pat == NULL)
2154  return(-1);
2155  while (pat) {
2156  next = pat->next;
2157  pat->next = NULL;
2158  name = NULL;
2159 
2160  pat->template = cur;
2161  if (mode != NULL)
2162  pat->mode = xmlDictLookup(style->dict, mode, -1);
2163  if (modeURI != NULL)
2164  pat->modeURI = xmlDictLookup(style->dict, modeURI, -1);
2165  if (priority != XSLT_PAT_NO_PRIORITY)
2166  pat->priority = priority;
2167 
2168  /*
2169  * insert it in the hash table list corresponding to its lookup name
2170  */
2171  switch (pat->steps[0].op) {
2172  case XSLT_OP_ATTR:
2173  if (pat->steps[0].value != NULL)
2174  name = pat->steps[0].value;
2175  else
2176  top = &(style->attrMatch);
2177  break;
2178  case XSLT_OP_PARENT:
2179  case XSLT_OP_ANCESTOR:
2180  top = &(style->elemMatch);
2181  break;
2182  case XSLT_OP_ROOT:
2183  top = &(style->rootMatch);
2184  break;
2185  case XSLT_OP_KEY:
2186  top = &(style->keyMatch);
2187  break;
2188  case XSLT_OP_ID:
2189  /* TODO optimize ID !!! */
2190  case XSLT_OP_NS:
2191  case XSLT_OP_ALL:
2192  top = &(style->elemMatch);
2193  break;
2194  case XSLT_OP_END:
2195  case XSLT_OP_PREDICATE:
2196  xsltTransformError(NULL, style, NULL,
2197  "xsltAddTemplate: invalid compiled pattern\n");
2198  xsltFreeCompMatch(pat);
2199  return(-1);
2200  /*
2201  * TODO: some flags at the top level about type based patterns
2202  * would be faster than inclusion in the hash table.
2203  */
2204  case XSLT_OP_PI:
2205  if (pat->steps[0].value != NULL)
2206  name = pat->steps[0].value;
2207  else
2208  top = &(style->piMatch);
2209  break;
2210  case XSLT_OP_COMMENT:
2211  top = &(style->commentMatch);
2212  break;
2213  case XSLT_OP_TEXT:
2214  top = &(style->textMatch);
2215  break;
2216  case XSLT_OP_ELEM:
2217  case XSLT_OP_NODE:
2218  if (pat->steps[0].value != NULL)
2219  name = pat->steps[0].value;
2220  else
2221  top = &(style->elemMatch);
2222  break;
2223  }
2224  if (name != NULL) {
2225  if (style->templatesHash == NULL) {
2226  style->templatesHash = xmlHashCreate(1024);
2227  if (style->templatesHash == NULL) {
2228  xsltFreeCompMatch(pat);
2229  return(-1);
2230  }
2231  xmlHashAddEntry3(style->templatesHash, name, mode, modeURI, pat);
2232  } else {
2233  list = (xsltCompMatchPtr) xmlHashLookup3(style->templatesHash,
2234  name, mode, modeURI);
2235  if (list == NULL) {
2236  xmlHashAddEntry3(style->templatesHash, name,
2237  mode, modeURI, pat);
2238  } else {
2239  /*
2240  * Note '<=' since one must choose among the matching
2241  * template rules that are left, the one that occurs
2242  * last in the stylesheet
2243  */
2244  if (list->priority <= pat->priority) {
2245  pat->next = list;
2246  xmlHashUpdateEntry3(style->templatesHash, name,
2247  mode, modeURI, pat, NULL);
2248  } else {
2249  while (list->next != NULL) {
2250  if (list->next->priority <= pat->priority)
2251  break;
2252  list = list->next;
2253  }
2254  pat->next = list->next;
2255  list->next = pat;
2256  }
2257  }
2258  }
2259  } else if (top != NULL) {
2260  list = *top;
2261  if (list == NULL) {
2262  *top = pat;
2263  pat->next = NULL;
2264  } else if (list->priority <= pat->priority) {
2265  pat->next = list;
2266  *top = pat;
2267  } else {
2268  while (list->next != NULL) {
2269  if (list->next->priority <= pat->priority)
2270  break;
2271  list = list->next;
2272  }
2273  pat->next = list->next;
2274  list->next = pat;
2275  }
2276  } else {
2277  xsltTransformError(NULL, style, NULL,
2278  "xsltAddTemplate: invalid compiled pattern\n");
2279  xsltFreeCompMatch(pat);
2280  return(-1);
2281  }
2282 #ifdef WITH_XSLT_DEBUG_PATTERN
2283  if (mode)
2284  xsltGenericDebug(xsltGenericDebugContext,
2285  "added pattern : '%s' mode '%s' priority %f\n",
2286  pat->pattern, pat->mode, pat->priority);
2287  else
2288  xsltGenericDebug(xsltGenericDebugContext,
2289  "added pattern : '%s' priority %f\n",
2290  pat->pattern, pat->priority);
2291 #endif
2292 
2293  pat = next;
2294  }
2295  return(0);
2296 }
2297 
2298 static int
2299 xsltComputeAllKeys(xsltTransformContextPtr ctxt, xmlNodePtr contextNode)
2300 {
2301  if ((ctxt == NULL) || (contextNode == NULL)) {
2302  xsltTransformError(ctxt, NULL, ctxt->inst,
2303  "Internal error in xsltComputeAllKeys(): "
2304  "Bad arguments.\n");
2305  return(-1);
2306  }
2307 
2308  if (ctxt->document == NULL) {
2309  /*
2310  * The document info will only be NULL if we have a RTF.
2311  */
2312  if (contextNode->doc->_private != NULL)
2313  goto doc_info_mismatch;
2314  /*
2315  * On-demand creation of the document info (needed for keys).
2316  */
2317  ctxt->document = xsltNewDocument(ctxt, contextNode->doc);
2318  if (ctxt->document == NULL)
2319  return(-1);
2320  }
2321  return xsltInitAllDocKeys(ctxt);
2322 
2323 doc_info_mismatch:
2324  xsltTransformError(ctxt, NULL, ctxt->inst,
2325  "Internal error in xsltComputeAllKeys(): "
2326  "The context's document info doesn't match the "
2327  "document info of the current result tree.\n");
2328  ctxt->state = XSLT_STATE_STOPPED;
2329  return(-1);
2330 }
2331 
2343 xsltTemplatePtr
2344 xsltGetTemplate(xsltTransformContextPtr ctxt, xmlNodePtr node,
2345  xsltStylesheetPtr style)
2346 {
2347  xsltStylesheetPtr curstyle;
2348  xsltTemplatePtr ret = NULL;
2349  const xmlChar *name = NULL;
2350  xsltCompMatchPtr list = NULL;
2351  float priority;
2352  int keyed = 0;
2353 
2354  if ((ctxt == NULL) || (node == NULL))
2355  return(NULL);
2356 
2357  if (style == NULL) {
2358  curstyle = ctxt->style;
2359  } else {
2360  curstyle = xsltNextImport(style);
2361  }
2362 
2363  while ((curstyle != NULL) && (curstyle != style)) {
2364  priority = XSLT_PAT_NO_PRIORITY;
2365  /* TODO : handle IDs/keys here ! */
2366  if (curstyle->templatesHash != NULL) {
2367  /*
2368  * Use the top name as selector
2369  */
2370  switch (node->type) {
2371  case XML_ELEMENT_NODE:
2372  if (node->name[0] == ' ')
2373  break;
2374  /* Intentional fall-through */
2375  case XML_ATTRIBUTE_NODE:
2376  case XML_PI_NODE:
2377  name = node->name;
2378  break;
2379  case XML_DOCUMENT_NODE:
2380  case XML_HTML_DOCUMENT_NODE:
2381  case XML_TEXT_NODE:
2382  case XML_CDATA_SECTION_NODE:
2383  case XML_COMMENT_NODE:
2384  case XML_ENTITY_REF_NODE:
2385  case XML_ENTITY_NODE:
2386  case XML_DOCUMENT_TYPE_NODE:
2387  case XML_DOCUMENT_FRAG_NODE:
2388  case XML_NOTATION_NODE:
2389  case XML_DTD_NODE:
2390  case XML_ELEMENT_DECL:
2391  case XML_ATTRIBUTE_DECL:
2392  case XML_ENTITY_DECL:
2393  case XML_NAMESPACE_DECL:
2394  case XML_XINCLUDE_START:
2395  case XML_XINCLUDE_END:
2396  break;
2397  default:
2398  return(NULL);
2399 
2400  }
2401  }
2402  if (name != NULL) {
2403  /*
2404  * find the list of applicable expressions based on the name
2405  */
2406  list = (xsltCompMatchPtr) xmlHashLookup3(curstyle->templatesHash,
2407  name, ctxt->mode, ctxt->modeURI);
2408  } else
2409  list = NULL;
2410  while (list != NULL) {
2411  if (xsltTestCompMatch(ctxt, list, node,
2412  ctxt->mode, ctxt->modeURI) == 1) {
2413  ret = list->template;
2414  priority = list->priority;
2415  break;
2416  }
2417  list = list->next;
2418  }
2419  list = NULL;
2420 
2421  /*
2422  * find alternate generic matches
2423  */
2424  switch (node->type) {
2425  case XML_ELEMENT_NODE:
2426  if (node->name[0] == ' ')
2427  list = curstyle->rootMatch;
2428  else
2429  list = curstyle->elemMatch;
2430  if (node->psvi != NULL) keyed = 1;
2431  break;
2432  case XML_ATTRIBUTE_NODE: {
2433  xmlAttrPtr attr;
2434 
2435  list = curstyle->attrMatch;
2436  attr = (xmlAttrPtr) node;
2437  if (attr->psvi != NULL) keyed = 1;
2438  break;
2439  }
2440  case XML_PI_NODE:
2441  list = curstyle->piMatch;
2442  if (node->psvi != NULL) keyed = 1;
2443  break;
2444  case XML_DOCUMENT_NODE:
2445  case XML_HTML_DOCUMENT_NODE: {
2446  xmlDocPtr doc;
2447 
2448  list = curstyle->rootMatch;
2449  doc = (xmlDocPtr) node;
2450  if (doc->psvi != NULL) keyed = 1;
2451  break;
2452  }
2453  case XML_TEXT_NODE:
2454  case XML_CDATA_SECTION_NODE:
2455  list = curstyle->textMatch;
2456  if (node->psvi != NULL) keyed = 1;
2457  break;
2458  case XML_COMMENT_NODE:
2459  list = curstyle->commentMatch;
2460  if (node->psvi != NULL) keyed = 1;
2461  break;
2462  case XML_ENTITY_REF_NODE:
2463  case XML_ENTITY_NODE:
2464  case XML_DOCUMENT_TYPE_NODE:
2465  case XML_DOCUMENT_FRAG_NODE:
2466  case XML_NOTATION_NODE:
2467  case XML_DTD_NODE:
2468  case XML_ELEMENT_DECL:
2469  case XML_ATTRIBUTE_DECL:
2470  case XML_ENTITY_DECL:
2471  case XML_NAMESPACE_DECL:
2472  case XML_XINCLUDE_START:
2473  case XML_XINCLUDE_END:
2474  break;
2475  default:
2476  break;
2477  }
2478  while ((list != NULL) &&
2479  ((ret == NULL) || (list->priority > priority))) {
2480  if (xsltTestCompMatch(ctxt, list, node,
2481  ctxt->mode, ctxt->modeURI) == 1) {
2482  ret = list->template;
2483  priority = list->priority;
2484  break;
2485  }
2486  list = list->next;
2487  }
2488  /*
2489  * Some of the tests for elements can also apply to documents
2490  */
2491  if ((node->type == XML_DOCUMENT_NODE) ||
2492  (node->type == XML_HTML_DOCUMENT_NODE) ||
2493  (node->type == XML_TEXT_NODE)) {
2494  list = curstyle->elemMatch;
2495  while ((list != NULL) &&
2496  ((ret == NULL) || (list->priority > priority))) {
2497  if (xsltTestCompMatch(ctxt, list, node,
2498  ctxt->mode, ctxt->modeURI) == 1) {
2499  ret = list->template;
2500  priority = list->priority;
2501  break;
2502  }
2503  list = list->next;
2504  }
2505  } else if ((node->type == XML_PI_NODE) ||
2506  (node->type == XML_COMMENT_NODE)) {
2507  list = curstyle->elemMatch;
2508  while ((list != NULL) &&
2509  ((ret == NULL) || (list->priority > priority))) {
2510  if (xsltTestCompMatch(ctxt, list, node,
2511  ctxt->mode, ctxt->modeURI) == 1) {
2512  ret = list->template;
2513  priority = list->priority;
2514  break;
2515  }
2516  list = list->next;
2517  }
2518  }
2519 
2520 keyed_match:
2521  if (keyed) {
2522  list = curstyle->keyMatch;
2523  while ((list != NULL) &&
2524  ((ret == NULL) || (list->priority > priority))) {
2525  if (xsltTestCompMatch(ctxt, list, node,
2526  ctxt->mode, ctxt->modeURI) == 1) {
2527  ret = list->template;
2528  priority = list->priority;
2529  break;
2530  }
2531  list = list->next;
2532  }
2533  }
2534  else if (ctxt->hasTemplKeyPatterns &&
2535  ((ctxt->document == NULL) ||
2536  (ctxt->document->nbKeysComputed < ctxt->nbKeys)))
2537  {
2538  /*
2539  * Compute all remaining keys for this document.
2540  *
2541  * REVISIT TODO: I think this could be further optimized.
2542  */
2543  if (xsltComputeAllKeys(ctxt, node) == -1)
2544  goto error;
2545 
2546  switch (node->type) {
2547  case XML_ELEMENT_NODE:
2548  if (node->psvi != NULL) keyed = 1;
2549  break;
2550  case XML_ATTRIBUTE_NODE:
2551  if (((xmlAttrPtr) node)->psvi != NULL) keyed = 1;
2552  break;
2553  case XML_TEXT_NODE:
2554  case XML_CDATA_SECTION_NODE:
2555  case XML_COMMENT_NODE:
2556  case XML_PI_NODE:
2557  if (node->psvi != NULL) keyed = 1;
2558  break;
2559  case XML_DOCUMENT_NODE:
2560  case XML_HTML_DOCUMENT_NODE:
2561  if (((xmlDocPtr) node)->psvi != NULL) keyed = 1;
2562  break;
2563  default:
2564  break;
2565  }
2566  if (keyed)
2567  goto keyed_match;
2568  }
2569  if (ret != NULL)
2570  return(ret);
2571 
2572  /*
2573  * Cycle on next curstylesheet import.
2574  */
2575  curstyle = xsltNextImport(curstyle);
2576  }
2577 
2578 error:
2579  return(NULL);
2580 }
2581 
2589 void
2590 xsltCleanupTemplates(xsltStylesheetPtr style ATTRIBUTE_UNUSED) {
2591 }
2592 
2599 void
2600 xsltFreeTemplateHashes(xsltStylesheetPtr style) {
2601  if (style->templatesHash != NULL)
2602  xmlHashFree((xmlHashTablePtr) style->templatesHash,
2603  xsltFreeCompMatchListEntry);
2604  if (style->rootMatch != NULL)
2605  xsltFreeCompMatchList(style->rootMatch);
2606  if (style->keyMatch != NULL)
2607  xsltFreeCompMatchList(style->keyMatch);
2608  if (style->elemMatch != NULL)
2609  xsltFreeCompMatchList(style->elemMatch);
2610  if (style->attrMatch != NULL)
2611  xsltFreeCompMatchList(style->attrMatch);
2612  if (style->parentMatch != NULL)
2613  xsltFreeCompMatchList(style->parentMatch);
2614  if (style->textMatch != NULL)
2615  xsltFreeCompMatchList(style->textMatch);
2616  if (style->piMatch != NULL)
2617  xsltFreeCompMatchList(style->piMatch);
2618  if (style->commentMatch != NULL)
2619  xsltFreeCompMatchList(style->commentMatch);
2620  if (style->namedTemplates != NULL)
2621  xmlHashFree(style->namedTemplates, NULL);
2622 }
2623 
_xsltTransformContext
Definition: xsltInternals.h:1668
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