2 * xpointer.c : Code to handle XML Pointer
4 * Base implementation was made accordingly to
5 * W3C Candidate Recommendation 7 June 2000
6 * http://www.w3.org/TR/2000/CR-xptr-20000607
8 * Added support for the element() scheme described in:
9 * W3C Proposed Recommendation 13 November 2002
10 * http://www.w3.org/TR/2002/PR-xptr-element-20021113/
12 * See Copyright for the status of this software.
21 * TODO: better handling of error cases, the full expression should
22 * be parsed beforehand instead of a progressive evaluation
23 * TODO: Access into entities references are not supported now ...
24 * need a start to be able to pop out of entities refs since
25 * parent is the endity declaration, not the ref.
29 #include <libxml/xpointer.h>
30 #include <libxml/xmlmemory.h>
31 #include <libxml/parserInternals.h>
32 #include <libxml/uri.h>
33 #include <libxml/xpath.h>
34 #include <libxml/xpathInternals.h>
35 #include <libxml/xmlerror.h>
36 #include <libxml/globals.h>
38 #ifdef LIBXML_XPTR_ENABLED
40 /* Add support of the xmlns() xpointer scheme to initialize the namespaces */
41 #define XPTR_XMLNS_SCHEME
43 /* #define DEBUG_RANGES */
45 #ifdef LIBXML_DEBUG_ENABLED
46 #include <libxml/debugXML.h>
51 xmlGenericError(xmlGenericErrorContext, \
52 "Unimplemented block at %s:%d\n", \
56 xmlGenericError(xmlGenericErrorContext, \
57 "Internal error at %s:%d\n", \
60 /************************************************************************
62 * Some factorized error routines *
64 ************************************************************************/
68 * @extra: extra informations
70 * Handle a redefinition of attribute error
73 xmlXPtrErrMemory(const char *extra)
75 __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_XPOINTER,
76 XML_ERR_NO_MEMORY, XML_ERR_ERROR, NULL, 0, extra,
78 "Memory allocation failed : %s\n", extra);
83 * @ctxt: an XPTR evaluation context
84 * @extra: extra informations
86 * Handle a redefinition of attribute error
89 xmlXPtrErr(xmlXPathParserContextPtr ctxt, int error,
90 const char * msg, const xmlChar *extra)
94 if ((ctxt == NULL) || (ctxt->context == NULL)) {
95 __xmlRaiseError(NULL, NULL, NULL,
96 NULL, NULL, XML_FROM_XPOINTER, error,
97 XML_ERR_ERROR, NULL, 0,
98 (const char *) extra, NULL, NULL, 0, 0,
102 ctxt->context->lastError.domain = XML_FROM_XPOINTER;
103 ctxt->context->lastError.code = error;
104 ctxt->context->lastError.level = XML_ERR_ERROR;
105 ctxt->context->lastError.str1 = (char *) xmlStrdup(ctxt->base);
106 ctxt->context->lastError.int1 = ctxt->cur - ctxt->base;
107 ctxt->context->lastError.node = ctxt->context->debugNode;
108 if (ctxt->context->error != NULL) {
109 ctxt->context->error(ctxt->context->userData,
110 &ctxt->context->lastError);
112 __xmlRaiseError(NULL, NULL, NULL,
113 NULL, ctxt->context->debugNode, XML_FROM_XPOINTER,
114 error, XML_ERR_ERROR, NULL, 0,
115 (const char *) extra, (const char *) ctxt->base, NULL,
116 ctxt->cur - ctxt->base, 0,
121 /************************************************************************
123 * A few helper functions for child sequences *
125 ************************************************************************/
126 /* xmlXPtrAdvanceNode is a private function, but used by xinclude.c */
127 xmlNodePtr xmlXPtrAdvanceNode(xmlNodePtr cur, int *level);
132 * Returns the number of child for an element, -1 in case of error
135 xmlXPtrGetArity(xmlNodePtr cur) {
140 for (i = 0;cur != NULL;cur = cur->next) {
141 if ((cur->type == XML_ELEMENT_NODE) ||
142 (cur->type == XML_DOCUMENT_NODE) ||
143 (cur->type == XML_HTML_DOCUMENT_NODE)) {
154 * Returns the index of the node in its parent children list, -1
158 xmlXPtrGetIndex(xmlNodePtr cur) {
162 for (i = 1;cur != NULL;cur = cur->prev) {
163 if ((cur->type == XML_ELEMENT_NODE) ||
164 (cur->type == XML_DOCUMENT_NODE) ||
165 (cur->type == XML_HTML_DOCUMENT_NODE)) {
173 * xmlXPtrGetNthChild:
175 * @no: the child number
177 * Returns the @no'th element child of @cur or NULL
180 xmlXPtrGetNthChild(xmlNodePtr cur, int no) {
185 for (i = 0;i <= no;cur = cur->next) {
188 if ((cur->type == XML_ELEMENT_NODE) ||
189 (cur->type == XML_DOCUMENT_NODE) ||
190 (cur->type == XML_HTML_DOCUMENT_NODE)) {
199 /************************************************************************
201 * Handling of XPointer specific types *
203 ************************************************************************/
207 * @node1: the first node
208 * @index1: the first index
209 * @node2: the second node
210 * @index2: the second index
212 * Compare two points w.r.t document order
214 * Returns -2 in case of error 1 if first point < second point, 0 if
215 * that's the same point, -1 otherwise
218 xmlXPtrCmpPoints(xmlNodePtr node1, int index1, xmlNodePtr node2, int index2) {
219 if ((node1 == NULL) || (node2 == NULL))
222 * a couple of optimizations which will avoid computations in most cases
224 if (node1 == node2) {
231 return(xmlXPathCmpNodes(node1, node2));
236 * @node: the xmlNodePtr
237 * @indx: the indx within the node
239 * Create a new xmlXPathObjectPtr of type point
241 * Returns the newly created object.
243 static xmlXPathObjectPtr
244 xmlXPtrNewPoint(xmlNodePtr node, int indx) {
245 xmlXPathObjectPtr ret;
252 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
254 xmlXPtrErrMemory("allocating point");
257 memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
258 ret->type = XPATH_POINT;
259 ret->user = (void *) node;
265 * xmlXPtrRangeCheckOrder:
266 * @range: an object range
268 * Make sure the points in the range are in the right order
271 xmlXPtrRangeCheckOrder(xmlXPathObjectPtr range) {
276 if (range->type != XPATH_RANGE)
278 if (range->user2 == NULL)
280 tmp = xmlXPtrCmpPoints(range->user, range->index,
281 range->user2, range->index2);
284 range->user = range->user2;
287 range->index = range->index2;
293 * xmlXPtrRangesEqual:
294 * @range1: the first range
295 * @range2: the second range
299 * Returns 1 if equal, 0 otherwise
302 xmlXPtrRangesEqual(xmlXPathObjectPtr range1, xmlXPathObjectPtr range2) {
303 if (range1 == range2)
305 if ((range1 == NULL) || (range2 == NULL))
307 if (range1->type != range2->type)
309 if (range1->type != XPATH_RANGE)
311 if (range1->user != range2->user)
313 if (range1->index != range2->index)
315 if (range1->user2 != range2->user2)
317 if (range1->index2 != range2->index2)
324 * @start: the starting node
325 * @startindex: the start index
326 * @end: the ending point
327 * @endindex: the ending index
329 * Create a new xmlXPathObjectPtr of type range
331 * Returns the newly created object.
334 xmlXPtrNewRange(xmlNodePtr start, int startindex,
335 xmlNodePtr end, int endindex) {
336 xmlXPathObjectPtr ret;
347 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
349 xmlXPtrErrMemory("allocating range");
352 memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
353 ret->type = XPATH_RANGE;
355 ret->index = startindex;
357 ret->index2 = endindex;
358 xmlXPtrRangeCheckOrder(ret);
363 * xmlXPtrNewRangePoints:
364 * @start: the starting point
365 * @end: the ending point
367 * Create a new xmlXPathObjectPtr of type range using 2 Points
369 * Returns the newly created object.
372 xmlXPtrNewRangePoints(xmlXPathObjectPtr start, xmlXPathObjectPtr end) {
373 xmlXPathObjectPtr ret;
379 if (start->type != XPATH_POINT)
381 if (end->type != XPATH_POINT)
384 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
386 xmlXPtrErrMemory("allocating range");
389 memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
390 ret->type = XPATH_RANGE;
391 ret->user = start->user;
392 ret->index = start->index;
393 ret->user2 = end->user;
394 ret->index2 = end->index;
395 xmlXPtrRangeCheckOrder(ret);
400 * xmlXPtrNewRangePointNode:
401 * @start: the starting point
402 * @end: the ending node
404 * Create a new xmlXPathObjectPtr of type range from a point to a node
406 * Returns the newly created object.
409 xmlXPtrNewRangePointNode(xmlXPathObjectPtr start, xmlNodePtr end) {
410 xmlXPathObjectPtr ret;
416 if (start->type != XPATH_POINT)
419 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
421 xmlXPtrErrMemory("allocating range");
424 memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
425 ret->type = XPATH_RANGE;
426 ret->user = start->user;
427 ret->index = start->index;
430 xmlXPtrRangeCheckOrder(ret);
435 * xmlXPtrNewRangeNodePoint:
436 * @start: the starting node
437 * @end: the ending point
439 * Create a new xmlXPathObjectPtr of type range from a node to a point
441 * Returns the newly created object.
444 xmlXPtrNewRangeNodePoint(xmlNodePtr start, xmlXPathObjectPtr end) {
445 xmlXPathObjectPtr ret;
451 if (start->type != XPATH_POINT)
453 if (end->type != XPATH_POINT)
456 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
458 xmlXPtrErrMemory("allocating range");
461 memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
462 ret->type = XPATH_RANGE;
465 ret->user2 = end->user;
466 ret->index2 = end->index;
467 xmlXPtrRangeCheckOrder(ret);
472 * xmlXPtrNewRangeNodes:
473 * @start: the starting node
474 * @end: the ending node
476 * Create a new xmlXPathObjectPtr of type range using 2 nodes
478 * Returns the newly created object.
481 xmlXPtrNewRangeNodes(xmlNodePtr start, xmlNodePtr end) {
482 xmlXPathObjectPtr ret;
489 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
491 xmlXPtrErrMemory("allocating range");
494 memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
495 ret->type = XPATH_RANGE;
500 xmlXPtrRangeCheckOrder(ret);
505 * xmlXPtrNewCollapsedRange:
506 * @start: the starting and ending node
508 * Create a new xmlXPathObjectPtr of type range using a single nodes
510 * Returns the newly created object.
513 xmlXPtrNewCollapsedRange(xmlNodePtr start) {
514 xmlXPathObjectPtr ret;
519 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
521 xmlXPtrErrMemory("allocating range");
524 memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
525 ret->type = XPATH_RANGE;
534 * xmlXPtrNewRangeNodeObject:
535 * @start: the starting node
536 * @end: the ending object
538 * Create a new xmlXPathObjectPtr of type range from a not to an object
540 * Returns the newly created object.
543 xmlXPtrNewRangeNodeObject(xmlNodePtr start, xmlXPathObjectPtr end) {
544 xmlXPathObjectPtr ret;
558 if (end->nodesetval->nodeNr <= 0)
566 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
568 xmlXPtrErrMemory("allocating range");
571 memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
572 ret->type = XPATH_RANGE;
577 ret->user2 = end->user;
578 ret->index2 = end->index;
581 ret->user2 = end->user2;
582 ret->index2 = end->index2;
584 case XPATH_NODESET: {
585 ret->user2 = end->nodesetval->nodeTab[end->nodesetval->nodeNr - 1];
593 xmlXPtrRangeCheckOrder(ret);
597 #define XML_RANGESET_DEFAULT 10
600 * xmlXPtrLocationSetCreate:
601 * @val: an initial xmlXPathObjectPtr, or NULL
603 * Create a new xmlLocationSetPtr of type double and of value @val
605 * Returns the newly created object.
608 xmlXPtrLocationSetCreate(xmlXPathObjectPtr val) {
609 xmlLocationSetPtr ret;
611 ret = (xmlLocationSetPtr) xmlMalloc(sizeof(xmlLocationSet));
613 xmlXPtrErrMemory("allocating locationset");
616 memset(ret, 0 , (size_t) sizeof(xmlLocationSet));
618 ret->locTab = (xmlXPathObjectPtr *) xmlMalloc(XML_RANGESET_DEFAULT *
619 sizeof(xmlXPathObjectPtr));
620 if (ret->locTab == NULL) {
621 xmlXPtrErrMemory("allocating locationset");
625 memset(ret->locTab, 0 ,
626 XML_RANGESET_DEFAULT * (size_t) sizeof(xmlXPathObjectPtr));
627 ret->locMax = XML_RANGESET_DEFAULT;
628 ret->locTab[ret->locNr++] = val;
634 * xmlXPtrLocationSetAdd:
635 * @cur: the initial range set
636 * @val: a new xmlXPathObjectPtr
638 * add a new xmlXPathObjectPtr to an existing LocationSet
639 * If the location already exist in the set @val is freed.
642 xmlXPtrLocationSetAdd(xmlLocationSetPtr cur, xmlXPathObjectPtr val) {
645 if ((cur == NULL) || (val == NULL)) return;
648 * check against doublons
650 for (i = 0;i < cur->locNr;i++) {
651 if (xmlXPtrRangesEqual(cur->locTab[i], val)) {
652 xmlXPathFreeObject(val);
658 * grow the locTab if needed
660 if (cur->locMax == 0) {
661 cur->locTab = (xmlXPathObjectPtr *) xmlMalloc(XML_RANGESET_DEFAULT *
662 sizeof(xmlXPathObjectPtr));
663 if (cur->locTab == NULL) {
664 xmlXPtrErrMemory("adding location to set");
667 memset(cur->locTab, 0 ,
668 XML_RANGESET_DEFAULT * (size_t) sizeof(xmlXPathObjectPtr));
669 cur->locMax = XML_RANGESET_DEFAULT;
670 } else if (cur->locNr == cur->locMax) {
671 xmlXPathObjectPtr *temp;
674 temp = (xmlXPathObjectPtr *) xmlRealloc(cur->locTab, cur->locMax *
675 sizeof(xmlXPathObjectPtr));
677 xmlXPtrErrMemory("adding location to set");
682 cur->locTab[cur->locNr++] = val;
686 * xmlXPtrLocationSetMerge:
687 * @val1: the first LocationSet
688 * @val2: the second LocationSet
690 * Merges two rangesets, all ranges from @val2 are added to @val1
692 * Returns val1 once extended or NULL in case of error.
695 xmlXPtrLocationSetMerge(xmlLocationSetPtr val1, xmlLocationSetPtr val2) {
698 if (val1 == NULL) return(NULL);
699 if (val2 == NULL) return(val1);
702 * !!!!! this can be optimized a lot, knowing that both
703 * val1 and val2 already have unicity of their values.
706 for (i = 0;i < val2->locNr;i++)
707 xmlXPtrLocationSetAdd(val1, val2->locTab[i]);
713 * xmlXPtrLocationSetDel:
714 * @cur: the initial range set
715 * @val: an xmlXPathObjectPtr
717 * Removes an xmlXPathObjectPtr from an existing LocationSet
720 xmlXPtrLocationSetDel(xmlLocationSetPtr cur, xmlXPathObjectPtr val) {
723 if (cur == NULL) return;
724 if (val == NULL) return;
727 * check against doublons
729 for (i = 0;i < cur->locNr;i++)
730 if (cur->locTab[i] == val) break;
732 if (i >= cur->locNr) {
734 xmlGenericError(xmlGenericErrorContext,
735 "xmlXPtrLocationSetDel: Range wasn't found in RangeList\n");
740 for (;i < cur->locNr;i++)
741 cur->locTab[i] = cur->locTab[i + 1];
742 cur->locTab[cur->locNr] = NULL;
746 * xmlXPtrLocationSetRemove:
747 * @cur: the initial range set
748 * @val: the index to remove
750 * Removes an entry from an existing LocationSet list.
753 xmlXPtrLocationSetRemove(xmlLocationSetPtr cur, int val) {
754 if (cur == NULL) return;
755 if (val >= cur->locNr) return;
757 for (;val < cur->locNr;val++)
758 cur->locTab[val] = cur->locTab[val + 1];
759 cur->locTab[cur->locNr] = NULL;
763 * xmlXPtrFreeLocationSet:
764 * @obj: the xmlLocationSetPtr to free
766 * Free the LocationSet compound (not the actual ranges !).
769 xmlXPtrFreeLocationSet(xmlLocationSetPtr obj) {
772 if (obj == NULL) return;
773 if (obj->locTab != NULL) {
774 for (i = 0;i < obj->locNr; i++) {
775 xmlXPathFreeObject(obj->locTab[i]);
777 xmlFree(obj->locTab);
783 * xmlXPtrNewLocationSetNodes:
784 * @start: the start NodePtr value
785 * @end: the end NodePtr value or NULL
787 * Create a new xmlXPathObjectPtr of type LocationSet and initialize
788 * it with the single range made of the two nodes @start and @end
790 * Returns the newly created object.
793 xmlXPtrNewLocationSetNodes(xmlNodePtr start, xmlNodePtr end) {
794 xmlXPathObjectPtr ret;
796 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
798 xmlXPtrErrMemory("allocating locationset");
801 memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
802 ret->type = XPATH_LOCATIONSET;
804 ret->user = xmlXPtrLocationSetCreate(xmlXPtrNewCollapsedRange(start));
806 ret->user = xmlXPtrLocationSetCreate(xmlXPtrNewRangeNodes(start,end));
811 * xmlXPtrNewLocationSetNodeSet:
814 * Create a new xmlXPathObjectPtr of type LocationSet and initialize
815 * it with all the nodes from @set
817 * Returns the newly created object.
820 xmlXPtrNewLocationSetNodeSet(xmlNodeSetPtr set) {
821 xmlXPathObjectPtr ret;
823 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
825 xmlXPtrErrMemory("allocating locationset");
828 memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
829 ret->type = XPATH_LOCATIONSET;
832 xmlLocationSetPtr newset;
834 newset = xmlXPtrLocationSetCreate(NULL);
838 for (i = 0;i < set->nodeNr;i++)
839 xmlXPtrLocationSetAdd(newset,
840 xmlXPtrNewCollapsedRange(set->nodeTab[i]));
842 ret->user = (void *) newset;
848 * xmlXPtrWrapLocationSet:
849 * @val: the LocationSet value
851 * Wrap the LocationSet @val in a new xmlXPathObjectPtr
853 * Returns the newly created object.
856 xmlXPtrWrapLocationSet(xmlLocationSetPtr val) {
857 xmlXPathObjectPtr ret;
859 ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
861 xmlXPtrErrMemory("allocating locationset");
864 memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
865 ret->type = XPATH_LOCATIONSET;
866 ret->user = (void *) val;
870 /************************************************************************
874 ************************************************************************/
876 static void xmlXPtrEvalChildSeq(xmlXPathParserContextPtr ctxt, xmlChar *name);
879 * Macros for accessing the content. Those should be used only by the parser,
882 * Dirty macros, i.e. one need to make assumption on the context to use them
884 * CUR_PTR return the current pointer to the xmlChar to be parsed.
885 * CUR returns the current xmlChar value, i.e. a 8 bit value
886 * in ISO-Latin or UTF-8.
887 * This should be used internally by the parser
888 * only to compare to ASCII values otherwise it would break when
889 * running with UTF-8 encoding.
890 * NXT(n) returns the n'th next xmlChar. Same as CUR is should be used only
891 * to compare on ASCII based substring.
892 * SKIP(n) Skip n xmlChar, and must also be used only to skip ASCII defined
893 * strings within the parser.
894 * CURRENT Returns the current char value, with the full decoding of
895 * UTF-8 if we are using this mode. It returns an int.
896 * NEXT Skip to the next character, this does the proper decoding
897 * in UTF-8 mode. It also pop-up unfinished entities on the fly.
898 * It returns the pointer to the current xmlChar.
901 #define CUR (*ctxt->cur)
902 #define SKIP(val) ctxt->cur += (val)
903 #define NXT(val) ctxt->cur[(val)]
904 #define CUR_PTR ctxt->cur
906 #define SKIP_BLANKS \
907 while (IS_BLANK_CH(*(ctxt->cur))) NEXT
909 #define CURRENT (*ctxt->cur)
910 #define NEXT ((*ctxt->cur) ? ctxt->cur++: ctxt->cur)
914 * @ctxt: the XPointer Parser context
915 * @index: the child number
917 * Move the current node of the nodeset on the stack to the
918 * given child if found
921 xmlXPtrGetChildNo(xmlXPathParserContextPtr ctxt, int indx) {
922 xmlNodePtr cur = NULL;
923 xmlXPathObjectPtr obj;
924 xmlNodeSetPtr oldset;
926 CHECK_TYPE(XPATH_NODESET);
927 obj = valuePop(ctxt);
928 oldset = obj->nodesetval;
929 if ((indx <= 0) || (oldset == NULL) || (oldset->nodeNr != 1)) {
930 xmlXPathFreeObject(obj);
931 valuePush(ctxt, xmlXPathNewNodeSet(NULL));
934 cur = xmlXPtrGetNthChild(oldset->nodeTab[0], indx);
936 xmlXPathFreeObject(obj);
937 valuePush(ctxt, xmlXPathNewNodeSet(NULL));
940 oldset->nodeTab[0] = cur;
941 valuePush(ctxt, obj);
945 * xmlXPtrEvalXPtrPart:
946 * @ctxt: the XPointer Parser context
947 * @name: the preparsed Scheme for the XPtrPart
949 * XPtrPart ::= 'xpointer' '(' XPtrExpr ')'
950 * | Scheme '(' SchemeSpecificExpr ')'
952 * Scheme ::= NCName - 'xpointer' [VC: Non-XPointer schemes]
954 * SchemeSpecificExpr ::= StringWithBalancedParens
956 * StringWithBalancedParens ::=
957 * [^()]* ('(' StringWithBalancedParens ')' [^()]*)*
958 * [VC: Parenthesis escaping]
960 * XPtrExpr ::= Expr [VC: Parenthesis escaping]
962 * VC: Parenthesis escaping:
963 * The end of an XPointer part is signaled by the right parenthesis ")"
964 * character that is balanced with the left parenthesis "(" character
965 * that began the part. Any unbalanced parenthesis character inside the
966 * expression, even within literals, must be escaped with a circumflex (^)
967 * character preceding it. If the expression contains any literal
968 * occurrences of the circumflex, each must be escaped with an additional
969 * circumflex (that is, ^^). If the unescaped parentheses in the expression
970 * are not balanced, a syntax error results.
972 * Parse and evaluate an XPtrPart. Basically it generates the unescaped
973 * string and if the scheme is 'xpointer' it will call the XPath interpreter.
975 * TODO: there is no new scheme registration mechanism
979 xmlXPtrEvalXPtrPart(xmlXPathParserContextPtr ctxt, xmlChar *name) {
980 xmlChar *buffer, *cur;
985 name = xmlXPathParseName(ctxt);
987 XP_ERROR(XPATH_EXPR_ERROR);
990 XP_ERROR(XPATH_EXPR_ERROR);
994 len = xmlStrlen(ctxt->cur);
996 buffer = (xmlChar *) xmlMallocAtomic(len * sizeof (xmlChar));
997 if (buffer == NULL) {
998 xmlXPtrErrMemory("allocating buffer");
1010 } else if (CUR == '(') {
1012 } else if (CUR == '^') {
1013 if ((NXT(1) == ')') || (NXT(1) == '(') || (NXT(1) == '^')) {
1022 if ((level != 0) && (CUR == 0)) {
1024 XP_ERROR(XPTR_SYNTAX_ERROR);
1027 if (xmlStrEqual(name, (xmlChar *) "xpointer")) {
1028 const xmlChar *left = CUR_PTR;
1032 * To evaluate an xpointer scheme element (4.3) we need:
1033 * context initialized to the root
1034 * context position initalized to 1
1035 * context size initialized to 1
1037 ctxt->context->node = (xmlNodePtr)ctxt->context->doc;
1038 ctxt->context->proximityPosition = 1;
1039 ctxt->context->contextSize = 1;
1040 xmlXPathEvalExpr(ctxt);
1042 } else if (xmlStrEqual(name, (xmlChar *) "element")) {
1043 const xmlChar *left = CUR_PTR;
1047 if (buffer[0] == '/') {
1049 xmlXPtrEvalChildSeq(ctxt, NULL);
1051 name2 = xmlXPathParseName(ctxt);
1052 if (name2 == NULL) {
1055 XP_ERROR(XPATH_EXPR_ERROR);
1057 xmlXPtrEvalChildSeq(ctxt, name2);
1060 #ifdef XPTR_XMLNS_SCHEME
1061 } else if (xmlStrEqual(name, (xmlChar *) "xmlns")) {
1062 const xmlChar *left = CUR_PTR;
1068 prefix = xmlXPathParseNCName(ctxt);
1069 if (prefix == NULL) {
1072 XP_ERROR(XPTR_SYNTAX_ERROR);
1079 XP_ERROR(XPTR_SYNTAX_ERROR);
1083 /* @@ check escaping in the XPointer WD */
1085 value = xmlParseURI((const char *)ctxt->cur);
1086 if (value == NULL) {
1090 XP_ERROR(XPTR_SYNTAX_ERROR);
1092 URI = xmlSaveUri(value);
1098 XP_ERROR(XPATH_MEMORY_ERROR);
1101 xmlXPathRegisterNs(ctxt->context, prefix, URI);
1105 #endif /* XPTR_XMLNS_SCHEME */
1107 xmlXPtrErr(ctxt, XML_XPTR_UNKNOWN_SCHEME,
1108 "unsupported scheme '%s'\n", name);
1115 * xmlXPtrEvalFullXPtr:
1116 * @ctxt: the XPointer Parser context
1117 * @name: the preparsed Scheme for the first XPtrPart
1119 * FullXPtr ::= XPtrPart (S? XPtrPart)*
1121 * As the specs says:
1123 * When multiple XPtrParts are provided, they must be evaluated in
1124 * left-to-right order. If evaluation of one part fails, the nexti
1125 * is evaluated. The following conditions cause XPointer part failure:
1127 * - An unknown scheme
1128 * - A scheme that does not locate any sub-resource present in the resource
1129 * - A scheme that is not applicable to the media type of the resource
1131 * The XPointer application must consume a failed XPointer part and
1132 * attempt to evaluate the next one, if any. The result of the first
1133 * XPointer part whose evaluation succeeds is taken to be the fragment
1134 * located by the XPointer as a whole. If all the parts fail, the result
1135 * for the XPointer as a whole is a sub-resource error.
1138 * Parse and evaluate a Full XPtr i.e. possibly a cascade of XPath based
1139 * expressions or other schemes.
1142 xmlXPtrEvalFullXPtr(xmlXPathParserContextPtr ctxt, xmlChar *name) {
1144 name = xmlXPathParseName(ctxt);
1146 XP_ERROR(XPATH_EXPR_ERROR);
1147 while (name != NULL) {
1148 ctxt->error = XPATH_EXPRESSION_OK;
1149 xmlXPtrEvalXPtrPart(ctxt, name);
1151 /* in case of syntax error, break here */
1152 if ((ctxt->error != XPATH_EXPRESSION_OK) &&
1153 (ctxt->error != XML_XPTR_UNKNOWN_SCHEME))
1157 * If the returned value is a non-empty nodeset
1158 * or location set, return here.
1160 if (ctxt->value != NULL) {
1161 xmlXPathObjectPtr obj = ctxt->value;
1163 switch (obj->type) {
1164 case XPATH_LOCATIONSET: {
1165 xmlLocationSetPtr loc = ctxt->value->user;
1166 if ((loc != NULL) && (loc->locNr > 0))
1170 case XPATH_NODESET: {
1171 xmlNodeSetPtr loc = ctxt->value->nodesetval;
1172 if ((loc != NULL) && (loc->nodeNr > 0))
1181 * Evaluating to improper values is equivalent to
1182 * a sub-resource error, clean-up the stack
1185 obj = valuePop(ctxt);
1187 xmlXPathFreeObject(obj);
1189 } while (obj != NULL);
1193 * Is there another XPointer part.
1196 name = xmlXPathParseName(ctxt);
1201 * xmlXPtrEvalChildSeq:
1202 * @ctxt: the XPointer Parser context
1203 * @name: a possible ID name of the child sequence
1205 * ChildSeq ::= '/1' ('/' [0-9]*)*
1206 * | Name ('/' [0-9]*)+
1208 * Parse and evaluate a Child Sequence. This routine also handle the
1209 * case of a Bare Name used to get a document ID.
1212 xmlXPtrEvalChildSeq(xmlXPathParserContextPtr ctxt, xmlChar *name) {
1214 * XPointer don't allow by syntax to address in mutirooted trees
1215 * this might prove useful in some cases, warn about it.
1217 if ((name == NULL) && (CUR == '/') && (NXT(1) != '1')) {
1218 xmlXPtrErr(ctxt, XML_XPTR_CHILDSEQ_START,
1219 "warning: ChildSeq not starting by /1\n", NULL);
1223 valuePush(ctxt, xmlXPathNewString(name));
1225 xmlXPathIdFunction(ctxt, 1);
1229 while (CUR == '/') {
1233 while ((CUR >= '0') && (CUR <= '9')) {
1234 child = child * 10 + (CUR - '0');
1237 xmlXPtrGetChildNo(ctxt, child);
1243 * xmlXPtrEvalXPointer:
1244 * @ctxt: the XPointer Parser context
1250 * Parse and evaluate an XPointer
1253 xmlXPtrEvalXPointer(xmlXPathParserContextPtr ctxt) {
1254 if (ctxt->valueTab == NULL) {
1255 /* Allocate the value stack */
1256 ctxt->valueTab = (xmlXPathObjectPtr *)
1257 xmlMalloc(10 * sizeof(xmlXPathObjectPtr));
1258 if (ctxt->valueTab == NULL) {
1259 xmlXPtrErrMemory("allocating evaluation context");
1263 ctxt->valueMax = 10;
1265 ctxt->valueFrame = 0;
1270 xmlXPtrEvalChildSeq(ctxt, NULL);
1274 name = xmlXPathParseName(ctxt);
1276 XP_ERROR(XPATH_EXPR_ERROR);
1278 xmlXPtrEvalFullXPtr(ctxt, name);
1279 /* Short evaluation */
1282 /* this handle both Bare Names and Child Sequences */
1283 xmlXPtrEvalChildSeq(ctxt, name);
1288 XP_ERROR(XPATH_EXPR_ERROR);
1292 /************************************************************************
1294 * General routines *
1296 ************************************************************************/
1299 void xmlXPtrStringRangeFunction(xmlXPathParserContextPtr ctxt, int nargs);
1301 void xmlXPtrStartPointFunction(xmlXPathParserContextPtr ctxt, int nargs);
1303 void xmlXPtrEndPointFunction(xmlXPathParserContextPtr ctxt, int nargs);
1305 void xmlXPtrHereFunction(xmlXPathParserContextPtr ctxt, int nargs);
1307 void xmlXPtrOriginFunction(xmlXPathParserContextPtr ctxt, int nargs);
1309 void xmlXPtrRangeInsideFunction(xmlXPathParserContextPtr ctxt, int nargs);
1311 void xmlXPtrRangeFunction(xmlXPathParserContextPtr ctxt, int nargs);
1314 * xmlXPtrNewContext:
1315 * @doc: the XML document
1316 * @here: the node that directly contains the XPointer being evaluated or NULL
1317 * @origin: the element from which a user or program initiated traversal of
1318 * the link, or NULL.
1320 * Create a new XPointer context
1322 * Returns the xmlXPathContext just allocated.
1325 xmlXPtrNewContext(xmlDocPtr doc, xmlNodePtr here, xmlNodePtr origin) {
1326 xmlXPathContextPtr ret;
1328 ret = xmlXPathNewContext(doc);
1333 ret->origin = origin;
1335 xmlXPathRegisterFunc(ret, (xmlChar *)"range-to",
1336 xmlXPtrRangeToFunction);
1337 xmlXPathRegisterFunc(ret, (xmlChar *)"range",
1338 xmlXPtrRangeFunction);
1339 xmlXPathRegisterFunc(ret, (xmlChar *)"range-inside",
1340 xmlXPtrRangeInsideFunction);
1341 xmlXPathRegisterFunc(ret, (xmlChar *)"string-range",
1342 xmlXPtrStringRangeFunction);
1343 xmlXPathRegisterFunc(ret, (xmlChar *)"start-point",
1344 xmlXPtrStartPointFunction);
1345 xmlXPathRegisterFunc(ret, (xmlChar *)"end-point",
1346 xmlXPtrEndPointFunction);
1347 xmlXPathRegisterFunc(ret, (xmlChar *)"here",
1348 xmlXPtrHereFunction);
1349 xmlXPathRegisterFunc(ret, (xmlChar *)" origin",
1350 xmlXPtrOriginFunction);
1357 * @str: the XPointer expression
1358 * @ctx: the XPointer context
1360 * Evaluate the XPath Location Path in the given context.
1362 * Returns the xmlXPathObjectPtr resulting from the evaluation or NULL.
1363 * the caller has to free the object.
1366 xmlXPtrEval(const xmlChar *str, xmlXPathContextPtr ctx) {
1367 xmlXPathParserContextPtr ctxt;
1368 xmlXPathObjectPtr res = NULL, tmp;
1369 xmlXPathObjectPtr init = NULL;
1374 if ((ctx == NULL) || (str == NULL))
1377 ctxt = xmlXPathNewParserContext(str, ctx);
1379 xmlXPtrEvalXPointer(ctxt);
1381 if ((ctxt->value != NULL) &&
1382 (ctxt->value->type != XPATH_NODESET) &&
1383 (ctxt->value->type != XPATH_LOCATIONSET)) {
1384 xmlXPtrErr(ctxt, XML_XPTR_EVAL_FAILED,
1385 "xmlXPtrEval: evaluation failed to return a node set\n",
1388 res = valuePop(ctxt);
1392 tmp = valuePop(ctxt);
1395 if (tmp->type == XPATH_NODESET) {
1397 * Evaluation may push a root nodeset which is unused
1400 set = tmp->nodesetval;
1401 if ((set->nodeNr != 1) ||
1402 (set->nodeTab[0] != (xmlNodePtr) ctx->doc))
1407 xmlXPathFreeObject(tmp);
1409 } while (tmp != NULL);
1411 xmlXPtrErr(ctxt, XML_XPTR_EXTRA_OBJECTS,
1412 "xmlXPtrEval: object(s) left on the eval stack\n",
1415 if (ctxt->error != XPATH_EXPRESSION_OK) {
1416 xmlXPathFreeObject(res);
1420 xmlXPathFreeParserContext(ctxt);
1425 * xmlXPtrBuildRangeNodeList:
1426 * @range: a range object
1428 * Build a node list tree copy of the range
1430 * Returns an xmlNodePtr list or NULL.
1431 * the caller has to free the node tree.
1434 xmlXPtrBuildRangeNodeList(xmlXPathObjectPtr range) {
1435 /* pointers to generated nodes */
1436 xmlNodePtr list = NULL, last = NULL, parent = NULL, tmp;
1437 /* pointers to traversal nodes */
1438 xmlNodePtr start, cur, end;
1443 if (range->type != XPATH_RANGE)
1445 start = (xmlNodePtr) range->user;
1451 return(xmlCopyNode(start, 1));
1454 index1 = range->index;
1455 index2 = range->index2;
1456 while (cur != NULL) {
1458 if (cur->type == XML_TEXT_NODE) {
1459 const xmlChar *content = cur->content;
1462 if (content == NULL) {
1463 tmp = xmlNewTextLen(NULL, 0);
1466 if ((cur == start) && (index1 > 1)) {
1467 content += (index1 - 1);
1468 len -= (index1 - 1);
1473 tmp = xmlNewTextLen(content, len);
1475 /* single sub text node selection */
1478 /* prune and return full set */
1480 xmlAddNextSibling(last, tmp);
1482 xmlAddChild(parent, tmp);
1485 tmp = xmlCopyNode(cur, 0);
1490 xmlAddNextSibling(last, tmp);
1492 xmlAddChild(parent, tmp);
1498 end = xmlXPtrGetNthChild(cur, index2 - 1);
1501 if ((cur == start) && (index1 > 1)) {
1502 cur = xmlXPtrGetNthChild(cur, index1 - 1);
1505 cur = cur->children;
1508 * Now gather the remaining nodes from cur to end
1510 continue; /* while */
1512 } else if ((cur == start) &&
1513 (list == NULL) /* looks superfluous but ... */ ) {
1514 if ((cur->type == XML_TEXT_NODE) ||
1515 (cur->type == XML_CDATA_SECTION_NODE)) {
1516 const xmlChar *content = cur->content;
1518 if (content == NULL) {
1519 tmp = xmlNewTextLen(NULL, 0);
1522 content += (index1 - 1);
1524 tmp = xmlNewText(content);
1528 if ((cur == start) && (index1 > 1)) {
1529 tmp = xmlCopyNode(cur, 0);
1533 cur = xmlXPtrGetNthChild(cur, index1 - 1);
1536 * Now gather the remaining nodes from cur to end
1538 continue; /* while */
1540 tmp = xmlCopyNode(cur, 1);
1547 switch (cur->type) {
1549 case XML_ELEMENT_DECL:
1550 case XML_ATTRIBUTE_DECL:
1551 case XML_ENTITY_NODE:
1552 /* Do not copy DTD informations */
1554 case XML_ENTITY_DECL:
1555 TODO /* handle crossing entities -> stack needed */
1557 case XML_XINCLUDE_START:
1558 case XML_XINCLUDE_END:
1559 /* don't consider it part of the tree content */
1561 case XML_ATTRIBUTE_NODE:
1562 /* Humm, should not happen ! */
1566 tmp = xmlCopyNode(cur, 1);
1570 if ((list == NULL) || ((last == NULL) && (parent == NULL))) {
1575 xmlAddNextSibling(last, tmp);
1577 xmlAddChild(parent, tmp);
1583 * Skip to next node in document order
1585 if ((list == NULL) || ((last == NULL) && (parent == NULL))) {
1589 cur = xmlXPtrAdvanceNode(cur, NULL);
1595 * xmlXPtrBuildNodeList:
1596 * @obj: the XPointer result from the evaluation.
1598 * Build a node list tree copy of the XPointer result.
1599 * This will drop Attributes and Namespace declarations.
1601 * Returns an xmlNodePtr list or NULL.
1602 * the caller has to free the node tree.
1605 xmlXPtrBuildNodeList(xmlXPathObjectPtr obj) {
1606 xmlNodePtr list = NULL, last = NULL;
1611 switch (obj->type) {
1612 case XPATH_NODESET: {
1613 xmlNodeSetPtr set = obj->nodesetval;
1616 for (i = 0;i < set->nodeNr;i++) {
1617 if (set->nodeTab[i] == NULL)
1619 switch (set->nodeTab[i]->type) {
1621 case XML_CDATA_SECTION_NODE:
1622 case XML_ELEMENT_NODE:
1623 case XML_ENTITY_REF_NODE:
1624 case XML_ENTITY_NODE:
1626 case XML_COMMENT_NODE:
1627 case XML_DOCUMENT_NODE:
1628 case XML_HTML_DOCUMENT_NODE:
1629 #ifdef LIBXML_DOCB_ENABLED
1630 case XML_DOCB_DOCUMENT_NODE:
1632 case XML_XINCLUDE_START:
1633 case XML_XINCLUDE_END:
1635 case XML_ATTRIBUTE_NODE:
1636 case XML_NAMESPACE_DECL:
1637 case XML_DOCUMENT_TYPE_NODE:
1638 case XML_DOCUMENT_FRAG_NODE:
1639 case XML_NOTATION_NODE:
1641 case XML_ELEMENT_DECL:
1642 case XML_ATTRIBUTE_DECL:
1643 case XML_ENTITY_DECL:
1647 list = last = xmlCopyNode(set->nodeTab[i], 1);
1649 xmlAddNextSibling(last, xmlCopyNode(set->nodeTab[i], 1));
1650 if (last->next != NULL)
1656 case XPATH_LOCATIONSET: {
1657 xmlLocationSetPtr set = (xmlLocationSetPtr) obj->user;
1660 for (i = 0;i < set->locNr;i++) {
1662 list = last = xmlXPtrBuildNodeList(set->locTab[i]);
1664 xmlAddNextSibling(last,
1665 xmlXPtrBuildNodeList(set->locTab[i]));
1667 while (last->next != NULL)
1674 return(xmlXPtrBuildRangeNodeList(obj));
1676 return(xmlCopyNode(obj->user, 0));
1683 /************************************************************************
1685 * XPointer functions *
1687 ************************************************************************/
1690 * xmlXPtrNbLocChildren:
1691 * @node: an xmlNodePtr
1693 * Count the number of location children of @node or the length of the
1694 * string value in case of text/PI/Comments nodes
1696 * Returns the number of location children
1699 xmlXPtrNbLocChildren(xmlNodePtr node) {
1703 switch (node->type) {
1704 case XML_HTML_DOCUMENT_NODE:
1705 case XML_DOCUMENT_NODE:
1706 case XML_ELEMENT_NODE:
1707 node = node->children;
1708 while (node != NULL) {
1709 if (node->type == XML_ELEMENT_NODE)
1714 case XML_ATTRIBUTE_NODE:
1718 case XML_COMMENT_NODE:
1720 case XML_CDATA_SECTION_NODE:
1721 case XML_ENTITY_REF_NODE:
1722 ret = xmlStrlen(node->content);
1731 * xmlXPtrHereFunction:
1732 * @ctxt: the XPointer Parser context
1733 * @nargs: the number of args
1735 * Function implementing here() operation
1736 * as described in 5.4.3
1739 xmlXPtrHereFunction(xmlXPathParserContextPtr ctxt, int nargs) {
1742 if (ctxt->context->here == NULL)
1743 XP_ERROR(XPTR_SYNTAX_ERROR);
1745 valuePush(ctxt, xmlXPtrNewLocationSetNodes(ctxt->context->here, NULL));
1749 * xmlXPtrOriginFunction:
1750 * @ctxt: the XPointer Parser context
1751 * @nargs: the number of args
1753 * Function implementing origin() operation
1754 * as described in 5.4.3
1757 xmlXPtrOriginFunction(xmlXPathParserContextPtr ctxt, int nargs) {
1760 if (ctxt->context->origin == NULL)
1761 XP_ERROR(XPTR_SYNTAX_ERROR);
1763 valuePush(ctxt, xmlXPtrNewLocationSetNodes(ctxt->context->origin, NULL));
1767 * xmlXPtrStartPointFunction:
1768 * @ctxt: the XPointer Parser context
1769 * @nargs: the number of args
1771 * Function implementing start-point() operation
1772 * as described in 5.4.3
1774 * location-set start-point(location-set)
1776 * For each location x in the argument location-set, start-point adds a
1777 * location of type point to the result location-set. That point represents
1778 * the start point of location x and is determined by the following rules:
1780 * - If x is of type point, the start point is x.
1781 * - If x is of type range, the start point is the start point of x.
1782 * - If x is of type root, element, text, comment, or processing instruction,
1783 * - the container node of the start point is x and the index is 0.
1784 * - If x is of type attribute or namespace, the function must signal a
1790 xmlXPtrStartPointFunction(xmlXPathParserContextPtr ctxt, int nargs) {
1791 xmlXPathObjectPtr tmp, obj, point;
1792 xmlLocationSetPtr newset = NULL;
1793 xmlLocationSetPtr oldset = NULL;
1796 if ((ctxt->value == NULL) ||
1797 ((ctxt->value->type != XPATH_LOCATIONSET) &&
1798 (ctxt->value->type != XPATH_NODESET)))
1799 XP_ERROR(XPATH_INVALID_TYPE)
1801 obj = valuePop(ctxt);
1802 if (obj->type == XPATH_NODESET) {
1804 * First convert to a location set
1806 tmp = xmlXPtrNewLocationSetNodeSet(obj->nodesetval);
1807 xmlXPathFreeObject(obj);
1811 newset = xmlXPtrLocationSetCreate(NULL);
1812 if (newset == NULL) {
1813 xmlXPathFreeObject(obj);
1814 XP_ERROR(XPATH_MEMORY_ERROR);
1816 oldset = (xmlLocationSetPtr) obj->user;
1817 if (oldset != NULL) {
1820 for (i = 0; i < oldset->locNr; i++) {
1821 tmp = oldset->locTab[i];
1825 switch (tmp->type) {
1827 point = xmlXPtrNewPoint(tmp->user, tmp->index);
1830 xmlNodePtr node = tmp->user;
1832 if (node->type == XML_ATTRIBUTE_NODE) {
1833 /* TODO: Namespace Nodes ??? */
1834 xmlXPathFreeObject(obj);
1835 xmlXPtrFreeLocationSet(newset);
1836 XP_ERROR(XPTR_SYNTAX_ERROR);
1838 point = xmlXPtrNewPoint(node, tmp->index);
1843 /*** Should we raise an error ?
1844 xmlXPathFreeObject(obj);
1845 xmlXPathFreeObject(newset);
1846 XP_ERROR(XPATH_INVALID_TYPE)
1851 xmlXPtrLocationSetAdd(newset, point);
1854 xmlXPathFreeObject(obj);
1855 valuePush(ctxt, xmlXPtrWrapLocationSet(newset));
1859 * xmlXPtrEndPointFunction:
1860 * @ctxt: the XPointer Parser context
1861 * @nargs: the number of args
1863 * Function implementing end-point() operation
1864 * as described in 5.4.3
1865 * ----------------------------
1866 * location-set end-point(location-set)
1868 * For each location x in the argument location-set, end-point adds a
1869 * location of type point to the result location-set. That point represents
1870 * the end point of location x and is determined by the following rules:
1872 * - If x is of type point, the resulting point is x.
1873 * - If x is of type range, the resulting point is the end point of x.
1874 * - If x is of type root or element, the container node of the resulting
1875 * point is x and the index is the number of location children of x.
1876 * - If x is of type text, comment, or processing instruction, the container
1877 * node of the resulting point is x and the index is the length of the
1878 * string-value of x.
1879 * - If x is of type attribute or namespace, the function must signal a
1881 * ----------------------------
1884 xmlXPtrEndPointFunction(xmlXPathParserContextPtr ctxt, int nargs) {
1885 xmlXPathObjectPtr tmp, obj, point;
1886 xmlLocationSetPtr newset = NULL;
1887 xmlLocationSetPtr oldset = NULL;
1890 if ((ctxt->value == NULL) ||
1891 ((ctxt->value->type != XPATH_LOCATIONSET) &&
1892 (ctxt->value->type != XPATH_NODESET)))
1893 XP_ERROR(XPATH_INVALID_TYPE)
1895 obj = valuePop(ctxt);
1896 if (obj->type == XPATH_NODESET) {
1898 * First convert to a location set
1900 tmp = xmlXPtrNewLocationSetNodeSet(obj->nodesetval);
1901 xmlXPathFreeObject(obj);
1905 newset = xmlXPtrLocationSetCreate(NULL);
1906 oldset = (xmlLocationSetPtr) obj->user;
1907 if (oldset != NULL) {
1910 for (i = 0; i < oldset->locNr; i++) {
1911 tmp = oldset->locTab[i];
1915 switch (tmp->type) {
1917 point = xmlXPtrNewPoint(tmp->user, tmp->index);
1920 xmlNodePtr node = tmp->user2;
1922 if (node->type == XML_ATTRIBUTE_NODE) {
1923 /* TODO: Namespace Nodes ??? */
1924 xmlXPathFreeObject(obj);
1925 xmlXPtrFreeLocationSet(newset);
1926 XP_ERROR(XPTR_SYNTAX_ERROR);
1928 point = xmlXPtrNewPoint(node, tmp->index2);
1929 } else if (tmp->user == NULL) {
1930 point = xmlXPtrNewPoint(node,
1931 xmlXPtrNbLocChildren(node));
1936 /*** Should we raise an error ?
1937 xmlXPathFreeObject(obj);
1938 xmlXPathFreeObject(newset);
1939 XP_ERROR(XPATH_INVALID_TYPE)
1944 xmlXPtrLocationSetAdd(newset, point);
1947 xmlXPathFreeObject(obj);
1948 valuePush(ctxt, xmlXPtrWrapLocationSet(newset));
1953 * xmlXPtrCoveringRange:
1954 * @ctxt: the XPointer Parser context
1955 * @loc: the location for which the covering range must be computed
1957 * A covering range is a range that wholly encompasses a location
1958 * Section 5.3.3. Covering Ranges for All Location Types
1959 * http://www.w3.org/TR/xptr#N2267
1961 * Returns a new location or NULL in case of error
1963 static xmlXPathObjectPtr
1964 xmlXPtrCoveringRange(xmlXPathParserContextPtr ctxt, xmlXPathObjectPtr loc) {
1967 if ((ctxt == NULL) || (ctxt->context == NULL) ||
1968 (ctxt->context->doc == NULL))
1970 switch (loc->type) {
1972 return(xmlXPtrNewRange(loc->user, loc->index,
1973 loc->user, loc->index));
1975 if (loc->user2 != NULL) {
1976 return(xmlXPtrNewRange(loc->user, loc->index,
1977 loc->user2, loc->index2));
1979 xmlNodePtr node = (xmlNodePtr) loc->user;
1980 if (node == (xmlNodePtr) ctxt->context->doc) {
1981 return(xmlXPtrNewRange(node, 0, node,
1982 xmlXPtrGetArity(node)));
1984 switch (node->type) {
1985 case XML_ATTRIBUTE_NODE:
1986 /* !!! our model is slightly different than XPath */
1987 return(xmlXPtrNewRange(node, 0, node,
1988 xmlXPtrGetArity(node)));
1989 case XML_ELEMENT_NODE:
1991 case XML_CDATA_SECTION_NODE:
1992 case XML_ENTITY_REF_NODE:
1994 case XML_COMMENT_NODE:
1995 case XML_DOCUMENT_NODE:
1996 case XML_NOTATION_NODE:
1997 case XML_HTML_DOCUMENT_NODE: {
1998 int indx = xmlXPtrGetIndex(node);
2000 node = node->parent;
2001 return(xmlXPtrNewRange(node, indx - 1,
2010 TODO /* missed one case ??? */
2016 * xmlXPtrRangeFunction:
2017 * @ctxt: the XPointer Parser context
2018 * @nargs: the number of args
2020 * Function implementing the range() function 5.4.3
2021 * location-set range(location-set )
2023 * The range function returns ranges covering the locations in
2024 * the argument location-set. For each location x in the argument
2025 * location-set, a range location representing the covering range of
2026 * x is added to the result location-set.
2029 xmlXPtrRangeFunction(xmlXPathParserContextPtr ctxt, int nargs) {
2031 xmlXPathObjectPtr set;
2032 xmlLocationSetPtr oldset;
2033 xmlLocationSetPtr newset;
2036 if ((ctxt->value == NULL) ||
2037 ((ctxt->value->type != XPATH_LOCATIONSET) &&
2038 (ctxt->value->type != XPATH_NODESET)))
2039 XP_ERROR(XPATH_INVALID_TYPE)
2041 set = valuePop(ctxt);
2042 if (set->type == XPATH_NODESET) {
2043 xmlXPathObjectPtr tmp;
2046 * First convert to a location set
2048 tmp = xmlXPtrNewLocationSetNodeSet(set->nodesetval);
2049 xmlXPathFreeObject(set);
2052 oldset = (xmlLocationSetPtr) set->user;
2055 * The loop is to compute the covering range for each item and add it
2057 newset = xmlXPtrLocationSetCreate(NULL);
2058 for (i = 0;i < oldset->locNr;i++) {
2059 xmlXPtrLocationSetAdd(newset,
2060 xmlXPtrCoveringRange(ctxt, oldset->locTab[i]));
2064 * Save the new value and cleanup
2066 valuePush(ctxt, xmlXPtrWrapLocationSet(newset));
2067 xmlXPathFreeObject(set);
2071 * xmlXPtrInsideRange:
2072 * @ctxt: the XPointer Parser context
2073 * @loc: the location for which the inside range must be computed
2075 * A inside range is a range described in the range-inside() description
2077 * Returns a new location or NULL in case of error
2079 static xmlXPathObjectPtr
2080 xmlXPtrInsideRange(xmlXPathParserContextPtr ctxt, xmlXPathObjectPtr loc) {
2083 if ((ctxt == NULL) || (ctxt->context == NULL) ||
2084 (ctxt->context->doc == NULL))
2086 switch (loc->type) {
2088 xmlNodePtr node = (xmlNodePtr) loc->user;
2089 switch (node->type) {
2091 case XML_COMMENT_NODE:
2093 case XML_CDATA_SECTION_NODE: {
2094 if (node->content == NULL) {
2095 return(xmlXPtrNewRange(node, 0, node, 0));
2097 return(xmlXPtrNewRange(node, 0, node,
2098 xmlStrlen(node->content)));
2101 case XML_ATTRIBUTE_NODE:
2102 case XML_ELEMENT_NODE:
2103 case XML_ENTITY_REF_NODE:
2104 case XML_DOCUMENT_NODE:
2105 case XML_NOTATION_NODE:
2106 case XML_HTML_DOCUMENT_NODE: {
2107 return(xmlXPtrNewRange(node, 0, node,
2108 xmlXPtrGetArity(node)));
2116 xmlNodePtr node = (xmlNodePtr) loc->user;
2117 if (loc->user2 != NULL) {
2118 return(xmlXPtrNewRange(node, loc->index,
2119 loc->user2, loc->index2));
2121 switch (node->type) {
2123 case XML_COMMENT_NODE:
2125 case XML_CDATA_SECTION_NODE: {
2126 if (node->content == NULL) {
2127 return(xmlXPtrNewRange(node, 0, node, 0));
2129 return(xmlXPtrNewRange(node, 0, node,
2130 xmlStrlen(node->content)));
2133 case XML_ATTRIBUTE_NODE:
2134 case XML_ELEMENT_NODE:
2135 case XML_ENTITY_REF_NODE:
2136 case XML_DOCUMENT_NODE:
2137 case XML_NOTATION_NODE:
2138 case XML_HTML_DOCUMENT_NODE: {
2139 return(xmlXPtrNewRange(node, 0, node,
2140 xmlXPtrGetArity(node)));
2149 TODO /* missed one case ??? */
2155 * xmlXPtrRangeInsideFunction:
2156 * @ctxt: the XPointer Parser context
2157 * @nargs: the number of args
2159 * Function implementing the range-inside() function 5.4.3
2160 * location-set range-inside(location-set )
2162 * The range-inside function returns ranges covering the contents of
2163 * the locations in the argument location-set. For each location x in
2164 * the argument location-set, a range location is added to the result
2165 * location-set. If x is a range location, then x is added to the
2166 * result location-set. If x is not a range location, then x is used
2167 * as the container location of the start and end points of the range
2168 * location to be added; the index of the start point of the range is
2169 * zero; if the end point is a character point then its index is the
2170 * length of the string-value of x, and otherwise is the number of
2171 * location children of x.
2175 xmlXPtrRangeInsideFunction(xmlXPathParserContextPtr ctxt, int nargs) {
2177 xmlXPathObjectPtr set;
2178 xmlLocationSetPtr oldset;
2179 xmlLocationSetPtr newset;
2182 if ((ctxt->value == NULL) ||
2183 ((ctxt->value->type != XPATH_LOCATIONSET) &&
2184 (ctxt->value->type != XPATH_NODESET)))
2185 XP_ERROR(XPATH_INVALID_TYPE)
2187 set = valuePop(ctxt);
2188 if (set->type == XPATH_NODESET) {
2189 xmlXPathObjectPtr tmp;
2192 * First convert to a location set
2194 tmp = xmlXPtrNewLocationSetNodeSet(set->nodesetval);
2195 xmlXPathFreeObject(set);
2198 oldset = (xmlLocationSetPtr) set->user;
2201 * The loop is to compute the covering range for each item and add it
2203 newset = xmlXPtrLocationSetCreate(NULL);
2204 for (i = 0;i < oldset->locNr;i++) {
2205 xmlXPtrLocationSetAdd(newset,
2206 xmlXPtrInsideRange(ctxt, oldset->locTab[i]));
2210 * Save the new value and cleanup
2212 valuePush(ctxt, xmlXPtrWrapLocationSet(newset));
2213 xmlXPathFreeObject(set);
2217 * xmlXPtrRangeToFunction:
2218 * @ctxt: the XPointer Parser context
2219 * @nargs: the number of args
2221 * Implement the range-to() XPointer function
2224 xmlXPtrRangeToFunction(xmlXPathParserContextPtr ctxt, int nargs) {
2225 xmlXPathObjectPtr range;
2227 xmlXPathObjectPtr res, obj;
2228 xmlXPathObjectPtr tmp;
2229 xmlLocationSetPtr newset = NULL;
2230 xmlNodeSetPtr oldset;
2233 if (ctxt == NULL) return;
2236 * Save the expression pointer since we will have to evaluate
2237 * it multiple times. Initialize the new set.
2239 CHECK_TYPE(XPATH_NODESET);
2240 obj = valuePop(ctxt);
2241 oldset = obj->nodesetval;
2242 ctxt->context->node = NULL;
2245 newset = xmlXPtrLocationSetCreate(NULL);
2247 for (i = 0; i < oldset->nodeNr; i++) {
2251 * Run the evaluation with a node list made of a single item
2254 ctxt->context->node = oldset->nodeTab[i];
2255 tmp = xmlXPathNewNodeSet(ctxt->context->node);
2256 valuePush(ctxt, tmp);
2258 xmlXPathEvalExpr(ctxt);
2262 * The result of the evaluation need to be tested to
2263 * decided whether the filter succeeded or not
2265 res = valuePop(ctxt);
2266 range = xmlXPtrNewRangeNodeObject(oldset->nodeTab[i], res);
2267 if (range != NULL) {
2268 xmlXPtrLocationSetAdd(newset, range);
2275 xmlXPathFreeObject(res);
2276 if (ctxt->value == tmp) {
2277 res = valuePop(ctxt);
2278 xmlXPathFreeObject(res);
2281 ctxt->context->node = NULL;
2285 * The result is used as the new evaluation set.
2287 xmlXPathFreeObject(obj);
2288 ctxt->context->node = NULL;
2289 ctxt->context->contextSize = -1;
2290 ctxt->context->proximityPosition = -1;
2291 valuePush(ctxt, xmlXPtrWrapLocationSet(newset));
2295 * xmlXPtrAdvanceNode:
2297 * @level: incremented/decremented to show level in tree
2299 * Advance to the next element or text node in document order
2300 * TODO: add a stack for entering/exiting entities
2302 * Returns -1 in case of failure, 0 otherwise
2305 xmlXPtrAdvanceNode(xmlNodePtr cur, int *level) {
2309 if (cur->children != NULL) {
2310 cur = cur->children ;
2315 skip: /* This label should only be needed if something is wrong! */
2316 if (cur->next != NULL) {
2324 if (cur == NULL) return(NULL);
2325 if (cur->next != NULL) {
2329 } while (cur != NULL);
2332 if ((cur->type != XML_ELEMENT_NODE) &&
2333 (cur->type != XML_TEXT_NODE) &&
2334 (cur->type != XML_DOCUMENT_NODE) &&
2335 (cur->type != XML_HTML_DOCUMENT_NODE) &&
2336 (cur->type != XML_CDATA_SECTION_NODE)) {
2337 if (cur->type == XML_ENTITY_REF_NODE) { /* Shouldn't happen */
2347 * xmlXPtrAdvanceChar:
2350 * @bytes: the number of bytes
2352 * Advance a point of the associated number of bytes (not UTF8 chars)
2354 * Returns -1 in case of failure, 0 otherwise
2357 xmlXPtrAdvanceChar(xmlNodePtr *node, int *indx, int bytes) {
2362 if ((node == NULL) || (indx == NULL))
2369 while (bytes >= 0) {
2371 * First position to the beginning of the first text node
2372 * corresponding to this point
2374 while ((cur != NULL) &&
2375 ((cur->type == XML_ELEMENT_NODE) ||
2376 (cur->type == XML_DOCUMENT_NODE) ||
2377 (cur->type == XML_HTML_DOCUMENT_NODE))) {
2379 cur = xmlXPtrGetNthChild(cur, pos);
2382 cur = xmlXPtrAdvanceNode(cur, NULL);
2394 * if there is no move needed return the current value.
2396 if (pos == 0) pos = 1;
2403 * We should have a text (or cdata) node ...
2406 if ((cur->type != XML_ELEMENT_NODE) &&
2407 (cur->content != NULL)) {
2408 len = xmlStrlen(cur->content);
2411 /* Strange, the indx in the text node is greater than it's len */
2415 if (pos + bytes >= len) {
2416 bytes -= (len - pos);
2417 cur = xmlXPtrAdvanceNode(cur, NULL);
2419 } else if (pos + bytes < len) {
2430 * xmlXPtrMatchString:
2431 * @string: the string to search
2432 * @start: the start textnode
2433 * @startindex: the start index
2434 * @end: the end textnode IN/OUT
2435 * @endindex: the end index IN/OUT
2437 * Check whether the document contains @string at the position
2438 * (@start, @startindex) and limited by the (@end, @endindex) point
2440 * Returns -1 in case of failure, 0 if not found, 1 if found in which case
2441 * (@start, @startindex) will indicate the position of the beginning
2442 * of the range and (@end, @endindex) will indicate the end
2446 xmlXPtrMatchString(const xmlChar *string, xmlNodePtr start, int startindex,
2447 xmlNodePtr *end, int *endindex) {
2449 int pos; /* 0 based */
2450 int len; /* in bytes */
2451 int stringlen; /* in bytes */
2458 if ((end == NULL) || (endindex == NULL))
2463 pos = startindex - 1;
2464 stringlen = xmlStrlen(string);
2466 while (stringlen > 0) {
2467 if ((cur == *end) && (pos + stringlen > *endindex))
2470 if ((cur->type != XML_ELEMENT_NODE) && (cur->content != NULL)) {
2471 len = xmlStrlen(cur->content);
2472 if (len >= pos + stringlen) {
2473 match = (!xmlStrncmp(&cur->content[pos], string, stringlen));
2476 xmlGenericError(xmlGenericErrorContext,
2477 "found range %d bytes at index %d of ->",
2478 stringlen, pos + 1);
2479 xmlDebugDumpString(stdout, cur->content);
2480 xmlGenericError(xmlGenericErrorContext, "\n");
2483 *endindex = pos + stringlen;
2489 int sub = len - pos;
2490 match = (!xmlStrncmp(&cur->content[pos], string, sub));
2493 xmlGenericError(xmlGenericErrorContext,
2494 "found subrange %d bytes at index %d of ->",
2496 xmlDebugDumpString(stdout, cur->content);
2497 xmlGenericError(xmlGenericErrorContext, "\n");
2499 string = &string[sub];
2506 cur = xmlXPtrAdvanceNode(cur, NULL);
2515 * xmlXPtrSearchString:
2516 * @string: the string to search
2517 * @start: the start textnode IN/OUT
2518 * @startindex: the start index IN/OUT
2519 * @end: the end textnode
2520 * @endindex: the end index
2522 * Search the next occurrence of @string within the document content
2523 * until the (@end, @endindex) point is reached
2525 * Returns -1 in case of failure, 0 if not found, 1 if found in which case
2526 * (@start, @startindex) will indicate the position of the beginning
2527 * of the range and (@end, @endindex) will indicate the end
2531 xmlXPtrSearchString(const xmlChar *string, xmlNodePtr *start, int *startindex,
2532 xmlNodePtr *end, int *endindex) {
2535 int pos; /* 0 based */
2536 int len; /* in bytes */
2541 if ((start == NULL) || (startindex == NULL))
2543 if ((end == NULL) || (endindex == NULL))
2548 pos = *startindex - 1;
2551 while (cur != NULL) {
2552 if ((cur->type != XML_ELEMENT_NODE) && (cur->content != NULL)) {
2553 len = xmlStrlen(cur->content);
2554 while (pos <= len) {
2556 str = xmlStrchr(&cur->content[pos], first);
2558 pos = (str - (xmlChar *)(cur->content));
2560 xmlGenericError(xmlGenericErrorContext,
2561 "found '%c' at index %d of ->",
2563 xmlDebugDumpString(stdout, cur->content);
2564 xmlGenericError(xmlGenericErrorContext, "\n");
2566 if (xmlXPtrMatchString(string, cur, pos + 1,
2569 *startindex = pos + 1;
2578 * An empty string is considered to match before each
2579 * character of the string-value and after the final
2583 xmlGenericError(xmlGenericErrorContext,
2584 "found '' at index %d of ->",
2586 xmlDebugDumpString(stdout, cur->content);
2587 xmlGenericError(xmlGenericErrorContext, "\n");
2590 *startindex = pos + 1;
2592 *endindex = pos + 1;
2597 if ((cur == *end) && (pos >= *endindex))
2599 cur = xmlXPtrAdvanceNode(cur, NULL);
2608 * xmlXPtrGetLastChar:
2612 * Computes the point coordinates of the last char of this point
2614 * Returns -1 in case of failure, 0 otherwise
2617 xmlXPtrGetLastChar(xmlNodePtr *node, int *indx) {
2621 if ((node == NULL) || (indx == NULL))
2629 if ((cur->type == XML_ELEMENT_NODE) ||
2630 (cur->type == XML_DOCUMENT_NODE) ||
2631 (cur->type == XML_HTML_DOCUMENT_NODE)) {
2633 cur = xmlXPtrGetNthChild(cur, pos);
2636 while (cur != NULL) {
2637 if (cur->last != NULL)
2639 else if ((cur->type != XML_ELEMENT_NODE) &&
2640 (cur->content != NULL)) {
2641 len = xmlStrlen(cur->content);
2655 * xmlXPtrGetStartPoint:
2657 * @node: the resulting node
2658 * @indx: the resulting index
2660 * read the object and return the start point coordinates.
2662 * Returns -1 in case of failure, 0 otherwise
2665 xmlXPtrGetStartPoint(xmlXPathObjectPtr obj, xmlNodePtr *node, int *indx) {
2666 if ((obj == NULL) || (node == NULL) || (indx == NULL))
2669 switch (obj->type) {
2672 if (obj->index <= 0)
2679 if (obj->index <= 0)
2691 * xmlXPtrGetEndPoint:
2693 * @node: the resulting node
2694 * @indx: the resulting indx
2696 * read the object and return the end point coordinates.
2698 * Returns -1 in case of failure, 0 otherwise
2701 xmlXPtrGetEndPoint(xmlXPathObjectPtr obj, xmlNodePtr *node, int *indx) {
2702 if ((obj == NULL) || (node == NULL) || (indx == NULL))
2705 switch (obj->type) {
2708 if (obj->index <= 0)
2715 if (obj->index <= 0)
2727 * xmlXPtrStringRangeFunction:
2728 * @ctxt: the XPointer Parser context
2729 * @nargs: the number of args
2731 * Function implementing the string-range() function
2732 * range as described in 5.4.2
2734 * ------------------------------
2735 * [Definition: For each location in the location-set argument,
2736 * string-range returns a set of string ranges, a set of substrings in a
2737 * string. Specifically, the string-value of the location is searched for
2738 * substrings that match the string argument, and the resulting location-set
2739 * will contain a range location for each non-overlapping match.]
2740 * An empty string is considered to match before each character of the
2741 * string-value and after the final character. Whitespace in a string
2742 * is matched literally, with no normalization except that provided by
2743 * XML for line ends. The third argument gives the position of the first
2744 * character to be in the resulting range, relative to the start of the
2745 * match. The default value is 1, which makes the range start immediately
2746 * before the first character of the matched string. The fourth argument
2747 * gives the number of characters in the range; the default is that the
2748 * range extends to the end of the matched string.
2750 * Element boundaries, as well as entire embedded nodes such as processing
2751 * instructions and comments, are ignored as defined in [XPath].
2753 * If the string in the second argument is not found in the string-value
2754 * of the location, or if a value in the third or fourth argument indicates
2755 * a string that is beyond the beginning or end of the document, the
2758 * The points of the range-locations in the returned location-set will
2759 * all be character points.
2760 * ------------------------------
2763 xmlXPtrStringRangeFunction(xmlXPathParserContextPtr ctxt, int nargs) {
2764 int i, startindex, endindex = 0, fendindex;
2765 xmlNodePtr start, end = 0, fend;
2766 xmlXPathObjectPtr set;
2767 xmlLocationSetPtr oldset;
2768 xmlLocationSetPtr newset;
2769 xmlXPathObjectPtr string;
2770 xmlXPathObjectPtr position = NULL;
2771 xmlXPathObjectPtr number = NULL;
2772 int found, pos = 0, num = 0;
2775 * Grab the arguments
2777 if ((nargs < 2) || (nargs > 4))
2778 XP_ERROR(XPATH_INVALID_ARITY);
2781 CHECK_TYPE(XPATH_NUMBER);
2782 number = valuePop(ctxt);
2784 num = (int) number->floatval;
2787 CHECK_TYPE(XPATH_NUMBER);
2788 position = valuePop(ctxt);
2789 if (position != NULL)
2790 pos = (int) position->floatval;
2792 CHECK_TYPE(XPATH_STRING);
2793 string = valuePop(ctxt);
2794 if ((ctxt->value == NULL) ||
2795 ((ctxt->value->type != XPATH_LOCATIONSET) &&
2796 (ctxt->value->type != XPATH_NODESET)))
2797 XP_ERROR(XPATH_INVALID_TYPE)
2799 set = valuePop(ctxt);
2800 newset = xmlXPtrLocationSetCreate(NULL);
2801 if (set->nodesetval == NULL) {
2804 if (set->type == XPATH_NODESET) {
2805 xmlXPathObjectPtr tmp;
2808 * First convert to a location set
2810 tmp = xmlXPtrNewLocationSetNodeSet(set->nodesetval);
2811 xmlXPathFreeObject(set);
2814 oldset = (xmlLocationSetPtr) set->user;
2817 * The loop is to search for each element in the location set
2818 * the list of location set corresponding to that search
2820 for (i = 0;i < oldset->locNr;i++) {
2822 xmlXPathDebugDumpObject(stdout, oldset->locTab[i], 0);
2825 xmlXPtrGetStartPoint(oldset->locTab[i], &start, &startindex);
2826 xmlXPtrGetEndPoint(oldset->locTab[i], &end, &endindex);
2827 xmlXPtrAdvanceChar(&start, &startindex, 0);
2828 xmlXPtrGetLastChar(&end, &endindex);
2831 xmlGenericError(xmlGenericErrorContext,
2832 "from index %d of ->", startindex);
2833 xmlDebugDumpString(stdout, start->content);
2834 xmlGenericError(xmlGenericErrorContext, "\n");
2835 xmlGenericError(xmlGenericErrorContext,
2836 "to index %d of ->", endindex);
2837 xmlDebugDumpString(stdout, end->content);
2838 xmlGenericError(xmlGenericErrorContext, "\n");
2842 fendindex = endindex;
2843 found = xmlXPtrSearchString(string->stringval, &start, &startindex,
2846 if (position == NULL) {
2847 xmlXPtrLocationSetAdd(newset,
2848 xmlXPtrNewRange(start, startindex, fend, fendindex));
2849 } else if (xmlXPtrAdvanceChar(&start, &startindex,
2851 if ((number != NULL) && (num > 0)) {
2855 rindx = startindex - 1;
2856 if (xmlXPtrAdvanceChar(&rend, &rindx,
2858 xmlXPtrLocationSetAdd(newset,
2859 xmlXPtrNewRange(start, startindex,
2862 } else if ((number != NULL) && (num <= 0)) {
2863 xmlXPtrLocationSetAdd(newset,
2864 xmlXPtrNewRange(start, startindex,
2865 start, startindex));
2867 xmlXPtrLocationSetAdd(newset,
2868 xmlXPtrNewRange(start, startindex,
2873 startindex = fendindex;
2874 if (string->stringval[0] == 0)
2877 } while (found == 1);
2881 * Save the new value and cleanup
2884 valuePush(ctxt, xmlXPtrWrapLocationSet(newset));
2885 xmlXPathFreeObject(set);
2886 xmlXPathFreeObject(string);
2887 if (position) xmlXPathFreeObject(position);
2888 if (number) xmlXPathFreeObject(number);
2892 * xmlXPtrEvalRangePredicate:
2893 * @ctxt: the XPointer Parser context
2895 * [8] Predicate ::= '[' PredicateExpr ']'
2896 * [9] PredicateExpr ::= Expr
2898 * Evaluate a predicate as in xmlXPathEvalPredicate() but for
2899 * a Location Set instead of a node set
2902 xmlXPtrEvalRangePredicate(xmlXPathParserContextPtr ctxt) {
2904 xmlXPathObjectPtr res;
2905 xmlXPathObjectPtr obj, tmp;
2906 xmlLocationSetPtr newset = NULL;
2907 xmlLocationSetPtr oldset;
2910 if (ctxt == NULL) return;
2914 XP_ERROR(XPATH_INVALID_PREDICATE_ERROR);
2920 * Extract the old set, and then evaluate the result of the
2921 * expression for all the element in the set. use it to grow
2924 CHECK_TYPE(XPATH_LOCATIONSET);
2925 obj = valuePop(ctxt);
2927 ctxt->context->node = NULL;
2929 if ((oldset == NULL) || (oldset->locNr == 0)) {
2930 ctxt->context->contextSize = 0;
2931 ctxt->context->proximityPosition = 0;
2932 xmlXPathEvalExpr(ctxt);
2933 res = valuePop(ctxt);
2935 xmlXPathFreeObject(res);
2936 valuePush(ctxt, obj);
2940 * Save the expression pointer since we will have to evaluate
2941 * it multiple times. Initialize the new set.
2944 newset = xmlXPtrLocationSetCreate(NULL);
2946 for (i = 0; i < oldset->locNr; i++) {
2950 * Run the evaluation with a node list made of a single item
2953 ctxt->context->node = oldset->locTab[i]->user;
2954 tmp = xmlXPathNewNodeSet(ctxt->context->node);
2955 valuePush(ctxt, tmp);
2956 ctxt->context->contextSize = oldset->locNr;
2957 ctxt->context->proximityPosition = i + 1;
2959 xmlXPathEvalExpr(ctxt);
2963 * The result of the evaluation need to be tested to
2964 * decided whether the filter succeeded or not
2966 res = valuePop(ctxt);
2967 if (xmlXPathEvaluatePredicateResult(ctxt, res)) {
2968 xmlXPtrLocationSetAdd(newset,
2969 xmlXPathObjectCopy(oldset->locTab[i]));
2976 xmlXPathFreeObject(res);
2977 if (ctxt->value == tmp) {
2978 res = valuePop(ctxt);
2979 xmlXPathFreeObject(res);
2982 ctxt->context->node = NULL;
2986 * The result is used as the new evaluation set.
2988 xmlXPathFreeObject(obj);
2989 ctxt->context->node = NULL;
2990 ctxt->context->contextSize = -1;
2991 ctxt->context->proximityPosition = -1;
2992 valuePush(ctxt, xmlXPtrWrapLocationSet(newset));
2995 XP_ERROR(XPATH_INVALID_PREDICATE_ERROR);
3002 #define bottom_xpointer
3003 #include "elfgcchack.h"