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-rw-r--r--libxml2-2.9.10/xpointer.c2954
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diff --git a/libxml2-2.9.10/xpointer.c b/libxml2-2.9.10/xpointer.c
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+/*
+ * xpointer.c : Code to handle XML Pointer
+ *
+ * Base implementation was made accordingly to
+ * W3C Candidate Recommendation 7 June 2000
+ * http://www.w3.org/TR/2000/CR-xptr-20000607
+ *
+ * Added support for the element() scheme described in:
+ * W3C Proposed Recommendation 13 November 2002
+ * http://www.w3.org/TR/2002/PR-xptr-element-20021113/
+ *
+ * See Copyright for the status of this software.
+ *
+ * daniel@veillard.com
+ */
+
+/* To avoid EBCDIC trouble when parsing on zOS */
+#if defined(__MVS__)
+#pragma convert("ISO8859-1")
+#endif
+
+#define IN_LIBXML
+#include "libxml.h"
+
+/*
+ * TODO: better handling of error cases, the full expression should
+ * be parsed beforehand instead of a progressive evaluation
+ * TODO: Access into entities references are not supported now ...
+ * need a start to be able to pop out of entities refs since
+ * parent is the entity declaration, not the ref.
+ */
+
+#include <string.h>
+#include <libxml/xpointer.h>
+#include <libxml/xmlmemory.h>
+#include <libxml/parserInternals.h>
+#include <libxml/uri.h>
+#include <libxml/xpath.h>
+#include <libxml/xpathInternals.h>
+#include <libxml/xmlerror.h>
+#include <libxml/globals.h>
+
+#ifdef LIBXML_XPTR_ENABLED
+
+/* Add support of the xmlns() xpointer scheme to initialize the namespaces */
+#define XPTR_XMLNS_SCHEME
+
+/* #define DEBUG_RANGES */
+#ifdef DEBUG_RANGES
+#ifdef LIBXML_DEBUG_ENABLED
+#include <libxml/debugXML.h>
+#endif
+#endif
+
+#define TODO \
+ xmlGenericError(xmlGenericErrorContext, \
+ "Unimplemented block at %s:%d\n", \
+ __FILE__, __LINE__);
+
+#define STRANGE \
+ xmlGenericError(xmlGenericErrorContext, \
+ "Internal error at %s:%d\n", \
+ __FILE__, __LINE__);
+
+/************************************************************************
+ * *
+ * Some factorized error routines *
+ * *
+ ************************************************************************/
+
+/**
+ * xmlXPtrErrMemory:
+ * @extra: extra informations
+ *
+ * Handle a redefinition of attribute error
+ */
+static void
+xmlXPtrErrMemory(const char *extra)
+{
+ __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_XPOINTER,
+ XML_ERR_NO_MEMORY, XML_ERR_ERROR, NULL, 0, extra,
+ NULL, NULL, 0, 0,
+ "Memory allocation failed : %s\n", extra);
+}
+
+/**
+ * xmlXPtrErr:
+ * @ctxt: an XPTR evaluation context
+ * @extra: extra informations
+ *
+ * Handle a redefinition of attribute error
+ */
+static void LIBXML_ATTR_FORMAT(3,0)
+xmlXPtrErr(xmlXPathParserContextPtr ctxt, int error,
+ const char * msg, const xmlChar *extra)
+{
+ if (ctxt != NULL)
+ ctxt->error = error;
+ if ((ctxt == NULL) || (ctxt->context == NULL)) {
+ __xmlRaiseError(NULL, NULL, NULL,
+ NULL, NULL, XML_FROM_XPOINTER, error,
+ XML_ERR_ERROR, NULL, 0,
+ (const char *) extra, NULL, NULL, 0, 0,
+ msg, extra);
+ return;
+ }
+
+ /* cleanup current last error */
+ xmlResetError(&ctxt->context->lastError);
+
+ ctxt->context->lastError.domain = XML_FROM_XPOINTER;
+ ctxt->context->lastError.code = error;
+ ctxt->context->lastError.level = XML_ERR_ERROR;
+ ctxt->context->lastError.str1 = (char *) xmlStrdup(ctxt->base);
+ ctxt->context->lastError.int1 = ctxt->cur - ctxt->base;
+ ctxt->context->lastError.node = ctxt->context->debugNode;
+ if (ctxt->context->error != NULL) {
+ ctxt->context->error(ctxt->context->userData,
+ &ctxt->context->lastError);
+ } else {
+ __xmlRaiseError(NULL, NULL, NULL,
+ NULL, ctxt->context->debugNode, XML_FROM_XPOINTER,
+ error, XML_ERR_ERROR, NULL, 0,
+ (const char *) extra, (const char *) ctxt->base, NULL,
+ ctxt->cur - ctxt->base, 0,
+ msg, extra);
+ }
+}
+
+/************************************************************************
+ * *
+ * A few helper functions for child sequences *
+ * *
+ ************************************************************************/
+/* xmlXPtrAdvanceNode is a private function, but used by xinclude.c */
+xmlNodePtr xmlXPtrAdvanceNode(xmlNodePtr cur, int *level);
+/**
+ * xmlXPtrGetArity:
+ * @cur: the node
+ *
+ * Returns the number of child for an element, -1 in case of error
+ */
+static int
+xmlXPtrGetArity(xmlNodePtr cur) {
+ int i;
+ if ((cur == NULL) || (cur->type == XML_NAMESPACE_DECL))
+ return(-1);
+ cur = cur->children;
+ for (i = 0;cur != NULL;cur = cur->next) {
+ if ((cur->type == XML_ELEMENT_NODE) ||
+ (cur->type == XML_DOCUMENT_NODE) ||
+ (cur->type == XML_HTML_DOCUMENT_NODE)) {
+ i++;
+ }
+ }
+ return(i);
+}
+
+/**
+ * xmlXPtrGetIndex:
+ * @cur: the node
+ *
+ * Returns the index of the node in its parent children list, -1
+ * in case of error
+ */
+static int
+xmlXPtrGetIndex(xmlNodePtr cur) {
+ int i;
+ if ((cur == NULL) || (cur->type == XML_NAMESPACE_DECL))
+ return(-1);
+ for (i = 1;cur != NULL;cur = cur->prev) {
+ if ((cur->type == XML_ELEMENT_NODE) ||
+ (cur->type == XML_DOCUMENT_NODE) ||
+ (cur->type == XML_HTML_DOCUMENT_NODE)) {
+ i++;
+ }
+ }
+ return(i);
+}
+
+/**
+ * xmlXPtrGetNthChild:
+ * @cur: the node
+ * @no: the child number
+ *
+ * Returns the @no'th element child of @cur or NULL
+ */
+static xmlNodePtr
+xmlXPtrGetNthChild(xmlNodePtr cur, int no) {
+ int i;
+ if ((cur == NULL) || (cur->type == XML_NAMESPACE_DECL))
+ return(cur);
+ cur = cur->children;
+ for (i = 0;i <= no;cur = cur->next) {
+ if (cur == NULL)
+ return(cur);
+ if ((cur->type == XML_ELEMENT_NODE) ||
+ (cur->type == XML_DOCUMENT_NODE) ||
+ (cur->type == XML_HTML_DOCUMENT_NODE)) {
+ i++;
+ if (i == no)
+ break;
+ }
+ }
+ return(cur);
+}
+
+/************************************************************************
+ * *
+ * Handling of XPointer specific types *
+ * *
+ ************************************************************************/
+
+/**
+ * xmlXPtrCmpPoints:
+ * @node1: the first node
+ * @index1: the first index
+ * @node2: the second node
+ * @index2: the second index
+ *
+ * Compare two points w.r.t document order
+ *
+ * Returns -2 in case of error 1 if first point < second point, 0 if
+ * that's the same point, -1 otherwise
+ */
+static int
+xmlXPtrCmpPoints(xmlNodePtr node1, int index1, xmlNodePtr node2, int index2) {
+ if ((node1 == NULL) || (node2 == NULL))
+ return(-2);
+ /*
+ * a couple of optimizations which will avoid computations in most cases
+ */
+ if (node1 == node2) {
+ if (index1 < index2)
+ return(1);
+ if (index1 > index2)
+ return(-1);
+ return(0);
+ }
+ return(xmlXPathCmpNodes(node1, node2));
+}
+
+/**
+ * xmlXPtrNewPoint:
+ * @node: the xmlNodePtr
+ * @indx: the indx within the node
+ *
+ * Create a new xmlXPathObjectPtr of type point
+ *
+ * Returns the newly created object.
+ */
+static xmlXPathObjectPtr
+xmlXPtrNewPoint(xmlNodePtr node, int indx) {
+ xmlXPathObjectPtr ret;
+
+ if (node == NULL)
+ return(NULL);
+ if (indx < 0)
+ return(NULL);
+
+ ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
+ if (ret == NULL) {
+ xmlXPtrErrMemory("allocating point");
+ return(NULL);
+ }
+ memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
+ ret->type = XPATH_POINT;
+ ret->user = (void *) node;
+ ret->index = indx;
+ return(ret);
+}
+
+/**
+ * xmlXPtrRangeCheckOrder:
+ * @range: an object range
+ *
+ * Make sure the points in the range are in the right order
+ */
+static void
+xmlXPtrRangeCheckOrder(xmlXPathObjectPtr range) {
+ int tmp;
+ xmlNodePtr tmp2;
+ if (range == NULL)
+ return;
+ if (range->type != XPATH_RANGE)
+ return;
+ if (range->user2 == NULL)
+ return;
+ tmp = xmlXPtrCmpPoints(range->user, range->index,
+ range->user2, range->index2);
+ if (tmp == -1) {
+ tmp2 = range->user;
+ range->user = range->user2;
+ range->user2 = tmp2;
+ tmp = range->index;
+ range->index = range->index2;
+ range->index2 = tmp;
+ }
+}
+
+/**
+ * xmlXPtrRangesEqual:
+ * @range1: the first range
+ * @range2: the second range
+ *
+ * Compare two ranges
+ *
+ * Returns 1 if equal, 0 otherwise
+ */
+static int
+xmlXPtrRangesEqual(xmlXPathObjectPtr range1, xmlXPathObjectPtr range2) {
+ if (range1 == range2)
+ return(1);
+ if ((range1 == NULL) || (range2 == NULL))
+ return(0);
+ if (range1->type != range2->type)
+ return(0);
+ if (range1->type != XPATH_RANGE)
+ return(0);
+ if (range1->user != range2->user)
+ return(0);
+ if (range1->index != range2->index)
+ return(0);
+ if (range1->user2 != range2->user2)
+ return(0);
+ if (range1->index2 != range2->index2)
+ return(0);
+ return(1);
+}
+
+/**
+ * xmlXPtrNewRangeInternal:
+ * @start: the starting node
+ * @startindex: the start index
+ * @end: the ending point
+ * @endindex: the ending index
+ *
+ * Internal function to create a new xmlXPathObjectPtr of type range
+ *
+ * Returns the newly created object.
+ */
+static xmlXPathObjectPtr
+xmlXPtrNewRangeInternal(xmlNodePtr start, int startindex,
+ xmlNodePtr end, int endindex) {
+ xmlXPathObjectPtr ret;
+
+ /*
+ * Namespace nodes must be copied (see xmlXPathNodeSetDupNs).
+ * Disallow them for now.
+ */
+ if ((start != NULL) && (start->type == XML_NAMESPACE_DECL))
+ return(NULL);
+ if ((end != NULL) && (end->type == XML_NAMESPACE_DECL))
+ return(NULL);
+
+ ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
+ if (ret == NULL) {
+ xmlXPtrErrMemory("allocating range");
+ return(NULL);
+ }
+ memset(ret, 0, sizeof(xmlXPathObject));
+ ret->type = XPATH_RANGE;
+ ret->user = start;
+ ret->index = startindex;
+ ret->user2 = end;
+ ret->index2 = endindex;
+ return(ret);
+}
+
+/**
+ * xmlXPtrNewRange:
+ * @start: the starting node
+ * @startindex: the start index
+ * @end: the ending point
+ * @endindex: the ending index
+ *
+ * Create a new xmlXPathObjectPtr of type range
+ *
+ * Returns the newly created object.
+ */
+xmlXPathObjectPtr
+xmlXPtrNewRange(xmlNodePtr start, int startindex,
+ xmlNodePtr end, int endindex) {
+ xmlXPathObjectPtr ret;
+
+ if (start == NULL)
+ return(NULL);
+ if (end == NULL)
+ return(NULL);
+ if (startindex < 0)
+ return(NULL);
+ if (endindex < 0)
+ return(NULL);
+
+ ret = xmlXPtrNewRangeInternal(start, startindex, end, endindex);
+ xmlXPtrRangeCheckOrder(ret);
+ return(ret);
+}
+
+/**
+ * xmlXPtrNewRangePoints:
+ * @start: the starting point
+ * @end: the ending point
+ *
+ * Create a new xmlXPathObjectPtr of type range using 2 Points
+ *
+ * Returns the newly created object.
+ */
+xmlXPathObjectPtr
+xmlXPtrNewRangePoints(xmlXPathObjectPtr start, xmlXPathObjectPtr end) {
+ xmlXPathObjectPtr ret;
+
+ if (start == NULL)
+ return(NULL);
+ if (end == NULL)
+ return(NULL);
+ if (start->type != XPATH_POINT)
+ return(NULL);
+ if (end->type != XPATH_POINT)
+ return(NULL);
+
+ ret = xmlXPtrNewRangeInternal(start->user, start->index, end->user,
+ end->index);
+ xmlXPtrRangeCheckOrder(ret);
+ return(ret);
+}
+
+/**
+ * xmlXPtrNewRangePointNode:
+ * @start: the starting point
+ * @end: the ending node
+ *
+ * Create a new xmlXPathObjectPtr of type range from a point to a node
+ *
+ * Returns the newly created object.
+ */
+xmlXPathObjectPtr
+xmlXPtrNewRangePointNode(xmlXPathObjectPtr start, xmlNodePtr end) {
+ xmlXPathObjectPtr ret;
+
+ if (start == NULL)
+ return(NULL);
+ if (end == NULL)
+ return(NULL);
+ if (start->type != XPATH_POINT)
+ return(NULL);
+
+ ret = xmlXPtrNewRangeInternal(start->user, start->index, end, -1);
+ xmlXPtrRangeCheckOrder(ret);
+ return(ret);
+}
+
+/**
+ * xmlXPtrNewRangeNodePoint:
+ * @start: the starting node
+ * @end: the ending point
+ *
+ * Create a new xmlXPathObjectPtr of type range from a node to a point
+ *
+ * Returns the newly created object.
+ */
+xmlXPathObjectPtr
+xmlXPtrNewRangeNodePoint(xmlNodePtr start, xmlXPathObjectPtr end) {
+ xmlXPathObjectPtr ret;
+
+ if (start == NULL)
+ return(NULL);
+ if (end == NULL)
+ return(NULL);
+ if (end->type != XPATH_POINT)
+ return(NULL);
+
+ ret = xmlXPtrNewRangeInternal(start, -1, end->user, end->index);
+ xmlXPtrRangeCheckOrder(ret);
+ return(ret);
+}
+
+/**
+ * xmlXPtrNewRangeNodes:
+ * @start: the starting node
+ * @end: the ending node
+ *
+ * Create a new xmlXPathObjectPtr of type range using 2 nodes
+ *
+ * Returns the newly created object.
+ */
+xmlXPathObjectPtr
+xmlXPtrNewRangeNodes(xmlNodePtr start, xmlNodePtr end) {
+ xmlXPathObjectPtr ret;
+
+ if (start == NULL)
+ return(NULL);
+ if (end == NULL)
+ return(NULL);
+
+ ret = xmlXPtrNewRangeInternal(start, -1, end, -1);
+ xmlXPtrRangeCheckOrder(ret);
+ return(ret);
+}
+
+/**
+ * xmlXPtrNewCollapsedRange:
+ * @start: the starting and ending node
+ *
+ * Create a new xmlXPathObjectPtr of type range using a single nodes
+ *
+ * Returns the newly created object.
+ */
+xmlXPathObjectPtr
+xmlXPtrNewCollapsedRange(xmlNodePtr start) {
+ xmlXPathObjectPtr ret;
+
+ if (start == NULL)
+ return(NULL);
+
+ ret = xmlXPtrNewRangeInternal(start, -1, NULL, -1);
+ return(ret);
+}
+
+/**
+ * xmlXPtrNewRangeNodeObject:
+ * @start: the starting node
+ * @end: the ending object
+ *
+ * Create a new xmlXPathObjectPtr of type range from a not to an object
+ *
+ * Returns the newly created object.
+ */
+xmlXPathObjectPtr
+xmlXPtrNewRangeNodeObject(xmlNodePtr start, xmlXPathObjectPtr end) {
+ xmlNodePtr endNode;
+ int endIndex;
+ xmlXPathObjectPtr ret;
+
+ if (start == NULL)
+ return(NULL);
+ if (end == NULL)
+ return(NULL);
+ switch (end->type) {
+ case XPATH_POINT:
+ endNode = end->user;
+ endIndex = end->index;
+ break;
+ case XPATH_RANGE:
+ endNode = end->user2;
+ endIndex = end->index2;
+ break;
+ case XPATH_NODESET:
+ /*
+ * Empty set ...
+ */
+ if ((end->nodesetval == NULL) || (end->nodesetval->nodeNr <= 0))
+ return(NULL);
+ endNode = end->nodesetval->nodeTab[end->nodesetval->nodeNr - 1];
+ endIndex = -1;
+ break;
+ default:
+ /* TODO */
+ return(NULL);
+ }
+
+ ret = xmlXPtrNewRangeInternal(start, -1, endNode, endIndex);
+ xmlXPtrRangeCheckOrder(ret);
+ return(ret);
+}
+
+#define XML_RANGESET_DEFAULT 10
+
+/**
+ * xmlXPtrLocationSetCreate:
+ * @val: an initial xmlXPathObjectPtr, or NULL
+ *
+ * Create a new xmlLocationSetPtr of type double and of value @val
+ *
+ * Returns the newly created object.
+ */
+xmlLocationSetPtr
+xmlXPtrLocationSetCreate(xmlXPathObjectPtr val) {
+ xmlLocationSetPtr ret;
+
+ ret = (xmlLocationSetPtr) xmlMalloc(sizeof(xmlLocationSet));
+ if (ret == NULL) {
+ xmlXPtrErrMemory("allocating locationset");
+ return(NULL);
+ }
+ memset(ret, 0 , (size_t) sizeof(xmlLocationSet));
+ if (val != NULL) {
+ ret->locTab = (xmlXPathObjectPtr *) xmlMalloc(XML_RANGESET_DEFAULT *
+ sizeof(xmlXPathObjectPtr));
+ if (ret->locTab == NULL) {
+ xmlXPtrErrMemory("allocating locationset");
+ xmlFree(ret);
+ return(NULL);
+ }
+ memset(ret->locTab, 0 ,
+ XML_RANGESET_DEFAULT * (size_t) sizeof(xmlXPathObjectPtr));
+ ret->locMax = XML_RANGESET_DEFAULT;
+ ret->locTab[ret->locNr++] = val;
+ }
+ return(ret);
+}
+
+/**
+ * xmlXPtrLocationSetAdd:
+ * @cur: the initial range set
+ * @val: a new xmlXPathObjectPtr
+ *
+ * add a new xmlXPathObjectPtr to an existing LocationSet
+ * If the location already exist in the set @val is freed.
+ */
+void
+xmlXPtrLocationSetAdd(xmlLocationSetPtr cur, xmlXPathObjectPtr val) {
+ int i;
+
+ if ((cur == NULL) || (val == NULL)) return;
+
+ /*
+ * check against doublons
+ */
+ for (i = 0;i < cur->locNr;i++) {
+ if (xmlXPtrRangesEqual(cur->locTab[i], val)) {
+ xmlXPathFreeObject(val);
+ return;
+ }
+ }
+
+ /*
+ * grow the locTab if needed
+ */
+ if (cur->locMax == 0) {
+ cur->locTab = (xmlXPathObjectPtr *) xmlMalloc(XML_RANGESET_DEFAULT *
+ sizeof(xmlXPathObjectPtr));
+ if (cur->locTab == NULL) {
+ xmlXPtrErrMemory("adding location to set");
+ return;
+ }
+ memset(cur->locTab, 0 ,
+ XML_RANGESET_DEFAULT * (size_t) sizeof(xmlXPathObjectPtr));
+ cur->locMax = XML_RANGESET_DEFAULT;
+ } else if (cur->locNr == cur->locMax) {
+ xmlXPathObjectPtr *temp;
+
+ cur->locMax *= 2;
+ temp = (xmlXPathObjectPtr *) xmlRealloc(cur->locTab, cur->locMax *
+ sizeof(xmlXPathObjectPtr));
+ if (temp == NULL) {
+ xmlXPtrErrMemory("adding location to set");
+ return;
+ }
+ cur->locTab = temp;
+ }
+ cur->locTab[cur->locNr++] = val;
+}
+
+/**
+ * xmlXPtrLocationSetMerge:
+ * @val1: the first LocationSet
+ * @val2: the second LocationSet
+ *
+ * Merges two rangesets, all ranges from @val2 are added to @val1
+ *
+ * Returns val1 once extended or NULL in case of error.
+ */
+xmlLocationSetPtr
+xmlXPtrLocationSetMerge(xmlLocationSetPtr val1, xmlLocationSetPtr val2) {
+ int i;
+
+ if (val1 == NULL) return(NULL);
+ if (val2 == NULL) return(val1);
+
+ /*
+ * !!!!! this can be optimized a lot, knowing that both
+ * val1 and val2 already have unicity of their values.
+ */
+
+ for (i = 0;i < val2->locNr;i++)
+ xmlXPtrLocationSetAdd(val1, val2->locTab[i]);
+
+ return(val1);
+}
+
+/**
+ * xmlXPtrLocationSetDel:
+ * @cur: the initial range set
+ * @val: an xmlXPathObjectPtr
+ *
+ * Removes an xmlXPathObjectPtr from an existing LocationSet
+ */
+void
+xmlXPtrLocationSetDel(xmlLocationSetPtr cur, xmlXPathObjectPtr val) {
+ int i;
+
+ if (cur == NULL) return;
+ if (val == NULL) return;
+
+ /*
+ * check against doublons
+ */
+ for (i = 0;i < cur->locNr;i++)
+ if (cur->locTab[i] == val) break;
+
+ if (i >= cur->locNr) {
+#ifdef DEBUG
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlXPtrLocationSetDel: Range wasn't found in RangeList\n");
+#endif
+ return;
+ }
+ cur->locNr--;
+ for (;i < cur->locNr;i++)
+ cur->locTab[i] = cur->locTab[i + 1];
+ cur->locTab[cur->locNr] = NULL;
+}
+
+/**
+ * xmlXPtrLocationSetRemove:
+ * @cur: the initial range set
+ * @val: the index to remove
+ *
+ * Removes an entry from an existing LocationSet list.
+ */
+void
+xmlXPtrLocationSetRemove(xmlLocationSetPtr cur, int val) {
+ if (cur == NULL) return;
+ if (val >= cur->locNr) return;
+ cur->locNr--;
+ for (;val < cur->locNr;val++)
+ cur->locTab[val] = cur->locTab[val + 1];
+ cur->locTab[cur->locNr] = NULL;
+}
+
+/**
+ * xmlXPtrFreeLocationSet:
+ * @obj: the xmlLocationSetPtr to free
+ *
+ * Free the LocationSet compound (not the actual ranges !).
+ */
+void
+xmlXPtrFreeLocationSet(xmlLocationSetPtr obj) {
+ int i;
+
+ if (obj == NULL) return;
+ if (obj->locTab != NULL) {
+ for (i = 0;i < obj->locNr; i++) {
+ xmlXPathFreeObject(obj->locTab[i]);
+ }
+ xmlFree(obj->locTab);
+ }
+ xmlFree(obj);
+}
+
+/**
+ * xmlXPtrNewLocationSetNodes:
+ * @start: the start NodePtr value
+ * @end: the end NodePtr value or NULL
+ *
+ * Create a new xmlXPathObjectPtr of type LocationSet and initialize
+ * it with the single range made of the two nodes @start and @end
+ *
+ * Returns the newly created object.
+ */
+xmlXPathObjectPtr
+xmlXPtrNewLocationSetNodes(xmlNodePtr start, xmlNodePtr end) {
+ xmlXPathObjectPtr ret;
+
+ ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
+ if (ret == NULL) {
+ xmlXPtrErrMemory("allocating locationset");
+ return(NULL);
+ }
+ memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
+ ret->type = XPATH_LOCATIONSET;
+ if (end == NULL)
+ ret->user = xmlXPtrLocationSetCreate(xmlXPtrNewCollapsedRange(start));
+ else
+ ret->user = xmlXPtrLocationSetCreate(xmlXPtrNewRangeNodes(start,end));
+ return(ret);
+}
+
+/**
+ * xmlXPtrNewLocationSetNodeSet:
+ * @set: a node set
+ *
+ * Create a new xmlXPathObjectPtr of type LocationSet and initialize
+ * it with all the nodes from @set
+ *
+ * Returns the newly created object.
+ */
+xmlXPathObjectPtr
+xmlXPtrNewLocationSetNodeSet(xmlNodeSetPtr set) {
+ xmlXPathObjectPtr ret;
+
+ ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
+ if (ret == NULL) {
+ xmlXPtrErrMemory("allocating locationset");
+ return(NULL);
+ }
+ memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
+ ret->type = XPATH_LOCATIONSET;
+ if (set != NULL) {
+ int i;
+ xmlLocationSetPtr newset;
+
+ newset = xmlXPtrLocationSetCreate(NULL);
+ if (newset == NULL)
+ return(ret);
+
+ for (i = 0;i < set->nodeNr;i++)
+ xmlXPtrLocationSetAdd(newset,
+ xmlXPtrNewCollapsedRange(set->nodeTab[i]));
+
+ ret->user = (void *) newset;
+ }
+ return(ret);
+}
+
+/**
+ * xmlXPtrWrapLocationSet:
+ * @val: the LocationSet value
+ *
+ * Wrap the LocationSet @val in a new xmlXPathObjectPtr
+ *
+ * Returns the newly created object.
+ */
+xmlXPathObjectPtr
+xmlXPtrWrapLocationSet(xmlLocationSetPtr val) {
+ xmlXPathObjectPtr ret;
+
+ ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject));
+ if (ret == NULL) {
+ xmlXPtrErrMemory("allocating locationset");
+ return(NULL);
+ }
+ memset(ret, 0 , (size_t) sizeof(xmlXPathObject));
+ ret->type = XPATH_LOCATIONSET;
+ ret->user = (void *) val;
+ return(ret);
+}
+
+/************************************************************************
+ * *
+ * The parser *
+ * *
+ ************************************************************************/
+
+static void xmlXPtrEvalChildSeq(xmlXPathParserContextPtr ctxt, xmlChar *name);
+
+/*
+ * Macros for accessing the content. Those should be used only by the parser,
+ * and not exported.
+ *
+ * Dirty macros, i.e. one need to make assumption on the context to use them
+ *
+ * CUR_PTR return the current pointer to the xmlChar to be parsed.
+ * CUR returns the current xmlChar value, i.e. a 8 bit value
+ * in ISO-Latin or UTF-8.
+ * This should be used internally by the parser
+ * only to compare to ASCII values otherwise it would break when
+ * running with UTF-8 encoding.
+ * NXT(n) returns the n'th next xmlChar. Same as CUR is should be used only
+ * to compare on ASCII based substring.
+ * SKIP(n) Skip n xmlChar, and must also be used only to skip ASCII defined
+ * strings within the parser.
+ * CURRENT Returns the current char value, with the full decoding of
+ * UTF-8 if we are using this mode. It returns an int.
+ * NEXT Skip to the next character, this does the proper decoding
+ * in UTF-8 mode. It also pop-up unfinished entities on the fly.
+ * It returns the pointer to the current xmlChar.
+ */
+
+#define CUR (*ctxt->cur)
+#define SKIP(val) ctxt->cur += (val)
+#define NXT(val) ctxt->cur[(val)]
+#define CUR_PTR ctxt->cur
+
+#define SKIP_BLANKS \
+ while (IS_BLANK_CH(*(ctxt->cur))) NEXT
+
+#define CURRENT (*ctxt->cur)
+#define NEXT ((*ctxt->cur) ? ctxt->cur++: ctxt->cur)
+
+/*
+ * xmlXPtrGetChildNo:
+ * @ctxt: the XPointer Parser context
+ * @index: the child number
+ *
+ * Move the current node of the nodeset on the stack to the
+ * given child if found
+ */
+static void
+xmlXPtrGetChildNo(xmlXPathParserContextPtr ctxt, int indx) {
+ xmlNodePtr cur = NULL;
+ xmlXPathObjectPtr obj;
+ xmlNodeSetPtr oldset;
+
+ CHECK_TYPE(XPATH_NODESET);
+ obj = valuePop(ctxt);
+ oldset = obj->nodesetval;
+ if ((indx <= 0) || (oldset == NULL) || (oldset->nodeNr != 1)) {
+ xmlXPathFreeObject(obj);
+ valuePush(ctxt, xmlXPathNewNodeSet(NULL));
+ return;
+ }
+ cur = xmlXPtrGetNthChild(oldset->nodeTab[0], indx);
+ if (cur == NULL) {
+ xmlXPathFreeObject(obj);
+ valuePush(ctxt, xmlXPathNewNodeSet(NULL));
+ return;
+ }
+ oldset->nodeTab[0] = cur;
+ valuePush(ctxt, obj);
+}
+
+/**
+ * xmlXPtrEvalXPtrPart:
+ * @ctxt: the XPointer Parser context
+ * @name: the preparsed Scheme for the XPtrPart
+ *
+ * XPtrPart ::= 'xpointer' '(' XPtrExpr ')'
+ * | Scheme '(' SchemeSpecificExpr ')'
+ *
+ * Scheme ::= NCName - 'xpointer' [VC: Non-XPointer schemes]
+ *
+ * SchemeSpecificExpr ::= StringWithBalancedParens
+ *
+ * StringWithBalancedParens ::=
+ * [^()]* ('(' StringWithBalancedParens ')' [^()]*)*
+ * [VC: Parenthesis escaping]
+ *
+ * XPtrExpr ::= Expr [VC: Parenthesis escaping]
+ *
+ * VC: Parenthesis escaping:
+ * The end of an XPointer part is signaled by the right parenthesis ")"
+ * character that is balanced with the left parenthesis "(" character
+ * that began the part. Any unbalanced parenthesis character inside the
+ * expression, even within literals, must be escaped with a circumflex (^)
+ * character preceding it. If the expression contains any literal
+ * occurrences of the circumflex, each must be escaped with an additional
+ * circumflex (that is, ^^). If the unescaped parentheses in the expression
+ * are not balanced, a syntax error results.
+ *
+ * Parse and evaluate an XPtrPart. Basically it generates the unescaped
+ * string and if the scheme is 'xpointer' it will call the XPath interpreter.
+ *
+ * TODO: there is no new scheme registration mechanism
+ */
+
+static void
+xmlXPtrEvalXPtrPart(xmlXPathParserContextPtr ctxt, xmlChar *name) {
+ xmlChar *buffer, *cur;
+ int len;
+ int level;
+
+ if (name == NULL)
+ name = xmlXPathParseName(ctxt);
+ if (name == NULL)
+ XP_ERROR(XPATH_EXPR_ERROR);
+
+ if (CUR != '(') {
+ xmlFree(name);
+ XP_ERROR(XPATH_EXPR_ERROR);
+ }
+ NEXT;
+ level = 1;
+
+ len = xmlStrlen(ctxt->cur);
+ len++;
+ buffer = (xmlChar *) xmlMallocAtomic(len * sizeof (xmlChar));
+ if (buffer == NULL) {
+ xmlXPtrErrMemory("allocating buffer");
+ xmlFree(name);
+ return;
+ }
+
+ cur = buffer;
+ while (CUR != 0) {
+ if (CUR == ')') {
+ level--;
+ if (level == 0) {
+ NEXT;
+ break;
+ }
+ } else if (CUR == '(') {
+ level++;
+ } else if (CUR == '^') {
+ if ((NXT(1) == ')') || (NXT(1) == '(') || (NXT(1) == '^')) {
+ NEXT;
+ }
+ }
+ *cur++ = CUR;
+ NEXT;
+ }
+ *cur = 0;
+
+ if ((level != 0) && (CUR == 0)) {
+ xmlFree(name);
+ xmlFree(buffer);
+ XP_ERROR(XPTR_SYNTAX_ERROR);
+ }
+
+ if (xmlStrEqual(name, (xmlChar *) "xpointer")) {
+ const xmlChar *left = CUR_PTR;
+
+ CUR_PTR = buffer;
+ /*
+ * To evaluate an xpointer scheme element (4.3) we need:
+ * context initialized to the root
+ * context position initalized to 1
+ * context size initialized to 1
+ */
+ ctxt->context->node = (xmlNodePtr)ctxt->context->doc;
+ ctxt->context->proximityPosition = 1;
+ ctxt->context->contextSize = 1;
+ xmlXPathEvalExpr(ctxt);
+ CUR_PTR=left;
+ } else if (xmlStrEqual(name, (xmlChar *) "element")) {
+ const xmlChar *left = CUR_PTR;
+ xmlChar *name2;
+
+ CUR_PTR = buffer;
+ if (buffer[0] == '/') {
+ xmlXPathRoot(ctxt);
+ xmlXPtrEvalChildSeq(ctxt, NULL);
+ } else {
+ name2 = xmlXPathParseName(ctxt);
+ if (name2 == NULL) {
+ CUR_PTR = left;
+ xmlFree(buffer);
+ xmlFree(name);
+ XP_ERROR(XPATH_EXPR_ERROR);
+ }
+ xmlXPtrEvalChildSeq(ctxt, name2);
+ }
+ CUR_PTR = left;
+#ifdef XPTR_XMLNS_SCHEME
+ } else if (xmlStrEqual(name, (xmlChar *) "xmlns")) {
+ const xmlChar *left = CUR_PTR;
+ xmlChar *prefix;
+ xmlChar *URI;
+ xmlURIPtr value;
+
+ CUR_PTR = buffer;
+ prefix = xmlXPathParseNCName(ctxt);
+ if (prefix == NULL) {
+ xmlFree(buffer);
+ xmlFree(name);
+ XP_ERROR(XPTR_SYNTAX_ERROR);
+ }
+ SKIP_BLANKS;
+ if (CUR != '=') {
+ xmlFree(prefix);
+ xmlFree(buffer);
+ xmlFree(name);
+ XP_ERROR(XPTR_SYNTAX_ERROR);
+ }
+ NEXT;
+ SKIP_BLANKS;
+ /* @@ check escaping in the XPointer WD */
+
+ value = xmlParseURI((const char *)ctxt->cur);
+ if (value == NULL) {
+ xmlFree(prefix);
+ xmlFree(buffer);
+ xmlFree(name);
+ XP_ERROR(XPTR_SYNTAX_ERROR);
+ }
+ URI = xmlSaveUri(value);
+ xmlFreeURI(value);
+ if (URI == NULL) {
+ xmlFree(prefix);
+ xmlFree(buffer);
+ xmlFree(name);
+ XP_ERROR(XPATH_MEMORY_ERROR);
+ }
+
+ xmlXPathRegisterNs(ctxt->context, prefix, URI);
+ CUR_PTR = left;
+ xmlFree(URI);
+ xmlFree(prefix);
+#endif /* XPTR_XMLNS_SCHEME */
+ } else {
+ xmlXPtrErr(ctxt, XML_XPTR_UNKNOWN_SCHEME,
+ "unsupported scheme '%s'\n", name);
+ }
+ xmlFree(buffer);
+ xmlFree(name);
+}
+
+/**
+ * xmlXPtrEvalFullXPtr:
+ * @ctxt: the XPointer Parser context
+ * @name: the preparsed Scheme for the first XPtrPart
+ *
+ * FullXPtr ::= XPtrPart (S? XPtrPart)*
+ *
+ * As the specs says:
+ * -----------
+ * When multiple XPtrParts are provided, they must be evaluated in
+ * left-to-right order. If evaluation of one part fails, the nexti
+ * is evaluated. The following conditions cause XPointer part failure:
+ *
+ * - An unknown scheme
+ * - A scheme that does not locate any sub-resource present in the resource
+ * - A scheme that is not applicable to the media type of the resource
+ *
+ * The XPointer application must consume a failed XPointer part and
+ * attempt to evaluate the next one, if any. The result of the first
+ * XPointer part whose evaluation succeeds is taken to be the fragment
+ * located by the XPointer as a whole. If all the parts fail, the result
+ * for the XPointer as a whole is a sub-resource error.
+ * -----------
+ *
+ * Parse and evaluate a Full XPtr i.e. possibly a cascade of XPath based
+ * expressions or other schemes.
+ */
+static void
+xmlXPtrEvalFullXPtr(xmlXPathParserContextPtr ctxt, xmlChar *name) {
+ if (name == NULL)
+ name = xmlXPathParseName(ctxt);
+ if (name == NULL)
+ XP_ERROR(XPATH_EXPR_ERROR);
+ while (name != NULL) {
+ ctxt->error = XPATH_EXPRESSION_OK;
+ xmlXPtrEvalXPtrPart(ctxt, name);
+
+ /* in case of syntax error, break here */
+ if ((ctxt->error != XPATH_EXPRESSION_OK) &&
+ (ctxt->error != XML_XPTR_UNKNOWN_SCHEME))
+ return;
+
+ /*
+ * If the returned value is a non-empty nodeset
+ * or location set, return here.
+ */
+ if (ctxt->value != NULL) {
+ xmlXPathObjectPtr obj = ctxt->value;
+
+ switch (obj->type) {
+ case XPATH_LOCATIONSET: {
+ xmlLocationSetPtr loc = ctxt->value->user;
+ if ((loc != NULL) && (loc->locNr > 0))
+ return;
+ break;
+ }
+ case XPATH_NODESET: {
+ xmlNodeSetPtr loc = ctxt->value->nodesetval;
+ if ((loc != NULL) && (loc->nodeNr > 0))
+ return;
+ break;
+ }
+ default:
+ break;
+ }
+
+ /*
+ * Evaluating to improper values is equivalent to
+ * a sub-resource error, clean-up the stack
+ */
+ do {
+ obj = valuePop(ctxt);
+ if (obj != NULL) {
+ xmlXPathFreeObject(obj);
+ }
+ } while (obj != NULL);
+ }
+
+ /*
+ * Is there another XPointer part.
+ */
+ SKIP_BLANKS;
+ name = xmlXPathParseName(ctxt);
+ }
+}
+
+/**
+ * xmlXPtrEvalChildSeq:
+ * @ctxt: the XPointer Parser context
+ * @name: a possible ID name of the child sequence
+ *
+ * ChildSeq ::= '/1' ('/' [0-9]*)*
+ * | Name ('/' [0-9]*)+
+ *
+ * Parse and evaluate a Child Sequence. This routine also handle the
+ * case of a Bare Name used to get a document ID.
+ */
+static void
+xmlXPtrEvalChildSeq(xmlXPathParserContextPtr ctxt, xmlChar *name) {
+ /*
+ * XPointer don't allow by syntax to address in multirooted trees
+ * this might prove useful in some cases, warn about it.
+ */
+ if ((name == NULL) && (CUR == '/') && (NXT(1) != '1')) {
+ xmlXPtrErr(ctxt, XML_XPTR_CHILDSEQ_START,
+ "warning: ChildSeq not starting by /1\n", NULL);
+ }
+
+ if (name != NULL) {
+ valuePush(ctxt, xmlXPathNewString(name));
+ xmlFree(name);
+ xmlXPathIdFunction(ctxt, 1);
+ CHECK_ERROR;
+ }
+
+ while (CUR == '/') {
+ int child = 0, overflow = 0;
+ NEXT;
+
+ while ((CUR >= '0') && (CUR <= '9')) {
+ int d = CUR - '0';
+ if (child > INT_MAX / 10)
+ overflow = 1;
+ else
+ child *= 10;
+ if (child > INT_MAX - d)
+ overflow = 1;
+ else
+ child += d;
+ NEXT;
+ }
+ if (overflow)
+ child = 0;
+ xmlXPtrGetChildNo(ctxt, child);
+ }
+}
+
+
+/**
+ * xmlXPtrEvalXPointer:
+ * @ctxt: the XPointer Parser context
+ *
+ * XPointer ::= Name
+ * | ChildSeq
+ * | FullXPtr
+ *
+ * Parse and evaluate an XPointer
+ */
+static void
+xmlXPtrEvalXPointer(xmlXPathParserContextPtr ctxt) {
+ if (ctxt->valueTab == NULL) {
+ /* Allocate the value stack */
+ ctxt->valueTab = (xmlXPathObjectPtr *)
+ xmlMalloc(10 * sizeof(xmlXPathObjectPtr));
+ if (ctxt->valueTab == NULL) {
+ xmlXPtrErrMemory("allocating evaluation context");
+ return;
+ }
+ ctxt->valueNr = 0;
+ ctxt->valueMax = 10;
+ ctxt->value = NULL;
+ ctxt->valueFrame = 0;
+ }
+ SKIP_BLANKS;
+ if (CUR == '/') {
+ xmlXPathRoot(ctxt);
+ xmlXPtrEvalChildSeq(ctxt, NULL);
+ } else {
+ xmlChar *name;
+
+ name = xmlXPathParseName(ctxt);
+ if (name == NULL)
+ XP_ERROR(XPATH_EXPR_ERROR);
+ if (CUR == '(') {
+ xmlXPtrEvalFullXPtr(ctxt, name);
+ /* Short evaluation */
+ return;
+ } else {
+ /* this handle both Bare Names and Child Sequences */
+ xmlXPtrEvalChildSeq(ctxt, name);
+ }
+ }
+ SKIP_BLANKS;
+ if (CUR != 0)
+ XP_ERROR(XPATH_EXPR_ERROR);
+}
+
+
+/************************************************************************
+ * *
+ * General routines *
+ * *
+ ************************************************************************/
+
+static
+void xmlXPtrStringRangeFunction(xmlXPathParserContextPtr ctxt, int nargs);
+static
+void xmlXPtrStartPointFunction(xmlXPathParserContextPtr ctxt, int nargs);
+static
+void xmlXPtrEndPointFunction(xmlXPathParserContextPtr ctxt, int nargs);
+static
+void xmlXPtrHereFunction(xmlXPathParserContextPtr ctxt, int nargs);
+static
+void xmlXPtrOriginFunction(xmlXPathParserContextPtr ctxt, int nargs);
+static
+void xmlXPtrRangeInsideFunction(xmlXPathParserContextPtr ctxt, int nargs);
+static
+void xmlXPtrRangeFunction(xmlXPathParserContextPtr ctxt, int nargs);
+
+/**
+ * xmlXPtrNewContext:
+ * @doc: the XML document
+ * @here: the node that directly contains the XPointer being evaluated or NULL
+ * @origin: the element from which a user or program initiated traversal of
+ * the link, or NULL.
+ *
+ * Create a new XPointer context
+ *
+ * Returns the xmlXPathContext just allocated.
+ */
+xmlXPathContextPtr
+xmlXPtrNewContext(xmlDocPtr doc, xmlNodePtr here, xmlNodePtr origin) {
+ xmlXPathContextPtr ret;
+
+ ret = xmlXPathNewContext(doc);
+ if (ret == NULL)
+ return(ret);
+ ret->xptr = 1;
+ ret->here = here;
+ ret->origin = origin;
+
+ xmlXPathRegisterFunc(ret, (xmlChar *)"range",
+ xmlXPtrRangeFunction);
+ xmlXPathRegisterFunc(ret, (xmlChar *)"range-inside",
+ xmlXPtrRangeInsideFunction);
+ xmlXPathRegisterFunc(ret, (xmlChar *)"string-range",
+ xmlXPtrStringRangeFunction);
+ xmlXPathRegisterFunc(ret, (xmlChar *)"start-point",
+ xmlXPtrStartPointFunction);
+ xmlXPathRegisterFunc(ret, (xmlChar *)"end-point",
+ xmlXPtrEndPointFunction);
+ xmlXPathRegisterFunc(ret, (xmlChar *)"here",
+ xmlXPtrHereFunction);
+ xmlXPathRegisterFunc(ret, (xmlChar *)" origin",
+ xmlXPtrOriginFunction);
+
+ return(ret);
+}
+
+/**
+ * xmlXPtrEval:
+ * @str: the XPointer expression
+ * @ctx: the XPointer context
+ *
+ * Evaluate the XPath Location Path in the given context.
+ *
+ * Returns the xmlXPathObjectPtr resulting from the evaluation or NULL.
+ * the caller has to free the object.
+ */
+xmlXPathObjectPtr
+xmlXPtrEval(const xmlChar *str, xmlXPathContextPtr ctx) {
+ xmlXPathParserContextPtr ctxt;
+ xmlXPathObjectPtr res = NULL, tmp;
+ xmlXPathObjectPtr init = NULL;
+ int stack = 0;
+
+ xmlXPathInit();
+
+ if ((ctx == NULL) || (str == NULL))
+ return(NULL);
+
+ ctxt = xmlXPathNewParserContext(str, ctx);
+ if (ctxt == NULL)
+ return(NULL);
+ ctxt->xptr = 1;
+ xmlXPtrEvalXPointer(ctxt);
+
+ if ((ctxt->value != NULL) &&
+ (ctxt->value->type != XPATH_NODESET) &&
+ (ctxt->value->type != XPATH_LOCATIONSET)) {
+ xmlXPtrErr(ctxt, XML_XPTR_EVAL_FAILED,
+ "xmlXPtrEval: evaluation failed to return a node set\n",
+ NULL);
+ } else {
+ res = valuePop(ctxt);
+ }
+
+ do {
+ tmp = valuePop(ctxt);
+ if (tmp != NULL) {
+ if (tmp != init) {
+ if (tmp->type == XPATH_NODESET) {
+ /*
+ * Evaluation may push a root nodeset which is unused
+ */
+ xmlNodeSetPtr set;
+ set = tmp->nodesetval;
+ if ((set == NULL) || (set->nodeNr != 1) ||
+ (set->nodeTab[0] != (xmlNodePtr) ctx->doc))
+ stack++;
+ } else
+ stack++;
+ }
+ xmlXPathFreeObject(tmp);
+ }
+ } while (tmp != NULL);
+ if (stack != 0) {
+ xmlXPtrErr(ctxt, XML_XPTR_EXTRA_OBJECTS,
+ "xmlXPtrEval: object(s) left on the eval stack\n",
+ NULL);
+ }
+ if (ctxt->error != XPATH_EXPRESSION_OK) {
+ xmlXPathFreeObject(res);
+ res = NULL;
+ }
+
+ xmlXPathFreeParserContext(ctxt);
+ return(res);
+}
+
+/**
+ * xmlXPtrBuildRangeNodeList:
+ * @range: a range object
+ *
+ * Build a node list tree copy of the range
+ *
+ * Returns an xmlNodePtr list or NULL.
+ * the caller has to free the node tree.
+ */
+static xmlNodePtr
+xmlXPtrBuildRangeNodeList(xmlXPathObjectPtr range) {
+ /* pointers to generated nodes */
+ xmlNodePtr list = NULL, last = NULL, parent = NULL, tmp;
+ /* pointers to traversal nodes */
+ xmlNodePtr start, cur, end;
+ int index1, index2;
+
+ if (range == NULL)
+ return(NULL);
+ if (range->type != XPATH_RANGE)
+ return(NULL);
+ start = (xmlNodePtr) range->user;
+
+ if ((start == NULL) || (start->type == XML_NAMESPACE_DECL))
+ return(NULL);
+ end = range->user2;
+ if (end == NULL)
+ return(xmlCopyNode(start, 1));
+ if (end->type == XML_NAMESPACE_DECL)
+ return(NULL);
+
+ cur = start;
+ index1 = range->index;
+ index2 = range->index2;
+ while (cur != NULL) {
+ if (cur == end) {
+ if (cur->type == XML_TEXT_NODE) {
+ const xmlChar *content = cur->content;
+ int len;
+
+ if (content == NULL) {
+ tmp = xmlNewTextLen(NULL, 0);
+ } else {
+ len = index2;
+ if ((cur == start) && (index1 > 1)) {
+ content += (index1 - 1);
+ len -= (index1 - 1);
+ index1 = 0;
+ } else {
+ len = index2;
+ }
+ tmp = xmlNewTextLen(content, len);
+ }
+ /* single sub text node selection */
+ if (list == NULL)
+ return(tmp);
+ /* prune and return full set */
+ if (last != NULL)
+ xmlAddNextSibling(last, tmp);
+ else
+ xmlAddChild(parent, tmp);
+ return(list);
+ } else {
+ tmp = xmlCopyNode(cur, 0);
+ if (list == NULL)
+ list = tmp;
+ else {
+ if (last != NULL)
+ xmlAddNextSibling(last, tmp);
+ else
+ xmlAddChild(parent, tmp);
+ }
+ last = NULL;
+ parent = tmp;
+
+ if (index2 > 1) {
+ end = xmlXPtrGetNthChild(cur, index2 - 1);
+ index2 = 0;
+ }
+ if ((cur == start) && (index1 > 1)) {
+ cur = xmlXPtrGetNthChild(cur, index1 - 1);
+ index1 = 0;
+ } else {
+ cur = cur->children;
+ }
+ /*
+ * Now gather the remaining nodes from cur to end
+ */
+ continue; /* while */
+ }
+ } else if ((cur == start) &&
+ (list == NULL) /* looks superfluous but ... */ ) {
+ if ((cur->type == XML_TEXT_NODE) ||
+ (cur->type == XML_CDATA_SECTION_NODE)) {
+ const xmlChar *content = cur->content;
+
+ if (content == NULL) {
+ tmp = xmlNewTextLen(NULL, 0);
+ } else {
+ if (index1 > 1) {
+ content += (index1 - 1);
+ }
+ tmp = xmlNewText(content);
+ }
+ last = list = tmp;
+ } else {
+ if ((cur == start) && (index1 > 1)) {
+ tmp = xmlCopyNode(cur, 0);
+ list = tmp;
+ parent = tmp;
+ last = NULL;
+ cur = xmlXPtrGetNthChild(cur, index1 - 1);
+ index1 = 0;
+ /*
+ * Now gather the remaining nodes from cur to end
+ */
+ continue; /* while */
+ }
+ tmp = xmlCopyNode(cur, 1);
+ list = tmp;
+ parent = NULL;
+ last = tmp;
+ }
+ } else {
+ tmp = NULL;
+ switch (cur->type) {
+ case XML_DTD_NODE:
+ case XML_ELEMENT_DECL:
+ case XML_ATTRIBUTE_DECL:
+ case XML_ENTITY_NODE:
+ /* Do not copy DTD informations */
+ break;
+ case XML_ENTITY_DECL:
+ TODO /* handle crossing entities -> stack needed */
+ break;
+ case XML_XINCLUDE_START:
+ case XML_XINCLUDE_END:
+ /* don't consider it part of the tree content */
+ break;
+ case XML_ATTRIBUTE_NODE:
+ /* Humm, should not happen ! */
+ STRANGE
+ break;
+ default:
+ tmp = xmlCopyNode(cur, 1);
+ break;
+ }
+ if (tmp != NULL) {
+ if ((list == NULL) || ((last == NULL) && (parent == NULL))) {
+ STRANGE
+ return(NULL);
+ }
+ if (last != NULL)
+ xmlAddNextSibling(last, tmp);
+ else {
+ xmlAddChild(parent, tmp);
+ last = tmp;
+ }
+ }
+ }
+ /*
+ * Skip to next node in document order
+ */
+ if ((list == NULL) || ((last == NULL) && (parent == NULL))) {
+ STRANGE
+ return(NULL);
+ }
+ cur = xmlXPtrAdvanceNode(cur, NULL);
+ }
+ return(list);
+}
+
+/**
+ * xmlXPtrBuildNodeList:
+ * @obj: the XPointer result from the evaluation.
+ *
+ * Build a node list tree copy of the XPointer result.
+ * This will drop Attributes and Namespace declarations.
+ *
+ * Returns an xmlNodePtr list or NULL.
+ * the caller has to free the node tree.
+ */
+xmlNodePtr
+xmlXPtrBuildNodeList(xmlXPathObjectPtr obj) {
+ xmlNodePtr list = NULL, last = NULL;
+ int i;
+
+ if (obj == NULL)
+ return(NULL);
+ switch (obj->type) {
+ case XPATH_NODESET: {
+ xmlNodeSetPtr set = obj->nodesetval;
+ if (set == NULL)
+ return(NULL);
+ for (i = 0;i < set->nodeNr;i++) {
+ if (set->nodeTab[i] == NULL)
+ continue;
+ switch (set->nodeTab[i]->type) {
+ case XML_TEXT_NODE:
+ case XML_CDATA_SECTION_NODE:
+ case XML_ELEMENT_NODE:
+ case XML_ENTITY_REF_NODE:
+ case XML_ENTITY_NODE:
+ case XML_PI_NODE:
+ case XML_COMMENT_NODE:
+ case XML_DOCUMENT_NODE:
+ case XML_HTML_DOCUMENT_NODE:
+#ifdef LIBXML_DOCB_ENABLED
+ case XML_DOCB_DOCUMENT_NODE:
+#endif
+ case XML_XINCLUDE_START:
+ case XML_XINCLUDE_END:
+ break;
+ case XML_ATTRIBUTE_NODE:
+ case XML_NAMESPACE_DECL:
+ case XML_DOCUMENT_TYPE_NODE:
+ case XML_DOCUMENT_FRAG_NODE:
+ case XML_NOTATION_NODE:
+ case XML_DTD_NODE:
+ case XML_ELEMENT_DECL:
+ case XML_ATTRIBUTE_DECL:
+ case XML_ENTITY_DECL:
+ continue; /* for */
+ }
+ if (last == NULL)
+ list = last = xmlCopyNode(set->nodeTab[i], 1);
+ else {
+ xmlAddNextSibling(last, xmlCopyNode(set->nodeTab[i], 1));
+ if (last->next != NULL)
+ last = last->next;
+ }
+ }
+ break;
+ }
+ case XPATH_LOCATIONSET: {
+ xmlLocationSetPtr set = (xmlLocationSetPtr) obj->user;
+ if (set == NULL)
+ return(NULL);
+ for (i = 0;i < set->locNr;i++) {
+ if (last == NULL)
+ list = last = xmlXPtrBuildNodeList(set->locTab[i]);
+ else
+ xmlAddNextSibling(last,
+ xmlXPtrBuildNodeList(set->locTab[i]));
+ if (last != NULL) {
+ while (last->next != NULL)
+ last = last->next;
+ }
+ }
+ break;
+ }
+ case XPATH_RANGE:
+ return(xmlXPtrBuildRangeNodeList(obj));
+ case XPATH_POINT:
+ return(xmlCopyNode(obj->user, 0));
+ default:
+ break;
+ }
+ return(list);
+}
+
+/************************************************************************
+ * *
+ * XPointer functions *
+ * *
+ ************************************************************************/
+
+/**
+ * xmlXPtrNbLocChildren:
+ * @node: an xmlNodePtr
+ *
+ * Count the number of location children of @node or the length of the
+ * string value in case of text/PI/Comments nodes
+ *
+ * Returns the number of location children
+ */
+static int
+xmlXPtrNbLocChildren(xmlNodePtr node) {
+ int ret = 0;
+ if (node == NULL)
+ return(-1);
+ switch (node->type) {
+ case XML_HTML_DOCUMENT_NODE:
+ case XML_DOCUMENT_NODE:
+ case XML_ELEMENT_NODE:
+ node = node->children;
+ while (node != NULL) {
+ if (node->type == XML_ELEMENT_NODE)
+ ret++;
+ node = node->next;
+ }
+ break;
+ case XML_ATTRIBUTE_NODE:
+ return(-1);
+
+ case XML_PI_NODE:
+ case XML_COMMENT_NODE:
+ case XML_TEXT_NODE:
+ case XML_CDATA_SECTION_NODE:
+ case XML_ENTITY_REF_NODE:
+ ret = xmlStrlen(node->content);
+ break;
+ default:
+ return(-1);
+ }
+ return(ret);
+}
+
+/**
+ * xmlXPtrHereFunction:
+ * @ctxt: the XPointer Parser context
+ * @nargs: the number of args
+ *
+ * Function implementing here() operation
+ * as described in 5.4.3
+ */
+static void
+xmlXPtrHereFunction(xmlXPathParserContextPtr ctxt, int nargs) {
+ CHECK_ARITY(0);
+
+ if (ctxt->context->here == NULL)
+ XP_ERROR(XPTR_SYNTAX_ERROR);
+
+ valuePush(ctxt, xmlXPtrNewLocationSetNodes(ctxt->context->here, NULL));
+}
+
+/**
+ * xmlXPtrOriginFunction:
+ * @ctxt: the XPointer Parser context
+ * @nargs: the number of args
+ *
+ * Function implementing origin() operation
+ * as described in 5.4.3
+ */
+static void
+xmlXPtrOriginFunction(xmlXPathParserContextPtr ctxt, int nargs) {
+ CHECK_ARITY(0);
+
+ if (ctxt->context->origin == NULL)
+ XP_ERROR(XPTR_SYNTAX_ERROR);
+
+ valuePush(ctxt, xmlXPtrNewLocationSetNodes(ctxt->context->origin, NULL));
+}
+
+/**
+ * xmlXPtrStartPointFunction:
+ * @ctxt: the XPointer Parser context
+ * @nargs: the number of args
+ *
+ * Function implementing start-point() operation
+ * as described in 5.4.3
+ * ----------------
+ * location-set start-point(location-set)
+ *
+ * For each location x in the argument location-set, start-point adds a
+ * location of type point to the result location-set. That point represents
+ * the start point of location x and is determined by the following rules:
+ *
+ * - If x is of type point, the start point is x.
+ * - If x is of type range, the start point is the start point of x.
+ * - If x is of type root, element, text, comment, or processing instruction,
+ * - the container node of the start point is x and the index is 0.
+ * - If x is of type attribute or namespace, the function must signal a
+ * syntax error.
+ * ----------------
+ *
+ */
+static void
+xmlXPtrStartPointFunction(xmlXPathParserContextPtr ctxt, int nargs) {
+ xmlXPathObjectPtr tmp, obj, point;
+ xmlLocationSetPtr newset = NULL;
+ xmlLocationSetPtr oldset = NULL;
+
+ CHECK_ARITY(1);
+ if ((ctxt->value == NULL) ||
+ ((ctxt->value->type != XPATH_LOCATIONSET) &&
+ (ctxt->value->type != XPATH_NODESET)))
+ XP_ERROR(XPATH_INVALID_TYPE)
+
+ obj = valuePop(ctxt);
+ if (obj->type == XPATH_NODESET) {
+ /*
+ * First convert to a location set
+ */
+ tmp = xmlXPtrNewLocationSetNodeSet(obj->nodesetval);
+ xmlXPathFreeObject(obj);
+ if (tmp == NULL)
+ XP_ERROR(XPATH_MEMORY_ERROR)
+ obj = tmp;
+ }
+
+ newset = xmlXPtrLocationSetCreate(NULL);
+ if (newset == NULL) {
+ xmlXPathFreeObject(obj);
+ XP_ERROR(XPATH_MEMORY_ERROR);
+ }
+ oldset = (xmlLocationSetPtr) obj->user;
+ if (oldset != NULL) {
+ int i;
+
+ for (i = 0; i < oldset->locNr; i++) {
+ tmp = oldset->locTab[i];
+ if (tmp == NULL)
+ continue;
+ point = NULL;
+ switch (tmp->type) {
+ case XPATH_POINT:
+ point = xmlXPtrNewPoint(tmp->user, tmp->index);
+ break;
+ case XPATH_RANGE: {
+ xmlNodePtr node = tmp->user;
+ if (node != NULL) {
+ if ((node->type == XML_ATTRIBUTE_NODE) ||
+ (node->type == XML_NAMESPACE_DECL)) {
+ xmlXPathFreeObject(obj);
+ xmlXPtrFreeLocationSet(newset);
+ XP_ERROR(XPTR_SYNTAX_ERROR);
+ }
+ point = xmlXPtrNewPoint(node, tmp->index);
+ }
+ break;
+ }
+ default:
+ /*** Should we raise an error ?
+ xmlXPathFreeObject(obj);
+ xmlXPathFreeObject(newset);
+ XP_ERROR(XPATH_INVALID_TYPE)
+ ***/
+ break;
+ }
+ if (point != NULL)
+ xmlXPtrLocationSetAdd(newset, point);
+ }
+ }
+ xmlXPathFreeObject(obj);
+ valuePush(ctxt, xmlXPtrWrapLocationSet(newset));
+}
+
+/**
+ * xmlXPtrEndPointFunction:
+ * @ctxt: the XPointer Parser context
+ * @nargs: the number of args
+ *
+ * Function implementing end-point() operation
+ * as described in 5.4.3
+ * ----------------------------
+ * location-set end-point(location-set)
+ *
+ * For each location x in the argument location-set, end-point adds a
+ * location of type point to the result location-set. That point represents
+ * the end point of location x and is determined by the following rules:
+ *
+ * - If x is of type point, the resulting point is x.
+ * - If x is of type range, the resulting point is the end point of x.
+ * - If x is of type root or element, the container node of the resulting
+ * point is x and the index is the number of location children of x.
+ * - If x is of type text, comment, or processing instruction, the container
+ * node of the resulting point is x and the index is the length of the
+ * string-value of x.
+ * - If x is of type attribute or namespace, the function must signal a
+ * syntax error.
+ * ----------------------------
+ */
+static void
+xmlXPtrEndPointFunction(xmlXPathParserContextPtr ctxt, int nargs) {
+ xmlXPathObjectPtr tmp, obj, point;
+ xmlLocationSetPtr newset = NULL;
+ xmlLocationSetPtr oldset = NULL;
+
+ CHECK_ARITY(1);
+ if ((ctxt->value == NULL) ||
+ ((ctxt->value->type != XPATH_LOCATIONSET) &&
+ (ctxt->value->type != XPATH_NODESET)))
+ XP_ERROR(XPATH_INVALID_TYPE)
+
+ obj = valuePop(ctxt);
+ if (obj->type == XPATH_NODESET) {
+ /*
+ * First convert to a location set
+ */
+ tmp = xmlXPtrNewLocationSetNodeSet(obj->nodesetval);
+ xmlXPathFreeObject(obj);
+ if (tmp == NULL)
+ XP_ERROR(XPATH_MEMORY_ERROR)
+ obj = tmp;
+ }
+
+ newset = xmlXPtrLocationSetCreate(NULL);
+ if (newset == NULL) {
+ xmlXPathFreeObject(obj);
+ XP_ERROR(XPATH_MEMORY_ERROR);
+ }
+ oldset = (xmlLocationSetPtr) obj->user;
+ if (oldset != NULL) {
+ int i;
+
+ for (i = 0; i < oldset->locNr; i++) {
+ tmp = oldset->locTab[i];
+ if (tmp == NULL)
+ continue;
+ point = NULL;
+ switch (tmp->type) {
+ case XPATH_POINT:
+ point = xmlXPtrNewPoint(tmp->user, tmp->index);
+ break;
+ case XPATH_RANGE: {
+ xmlNodePtr node = tmp->user2;
+ if (node != NULL) {
+ if ((node->type == XML_ATTRIBUTE_NODE) ||
+ (node->type == XML_NAMESPACE_DECL)) {
+ xmlXPathFreeObject(obj);
+ xmlXPtrFreeLocationSet(newset);
+ XP_ERROR(XPTR_SYNTAX_ERROR);
+ }
+ point = xmlXPtrNewPoint(node, tmp->index2);
+ } else if (tmp->user == NULL) {
+ point = xmlXPtrNewPoint(node,
+ xmlXPtrNbLocChildren(node));
+ }
+ break;
+ }
+ default:
+ /*** Should we raise an error ?
+ xmlXPathFreeObject(obj);
+ xmlXPathFreeObject(newset);
+ XP_ERROR(XPATH_INVALID_TYPE)
+ ***/
+ break;
+ }
+ if (point != NULL)
+ xmlXPtrLocationSetAdd(newset, point);
+ }
+ }
+ xmlXPathFreeObject(obj);
+ valuePush(ctxt, xmlXPtrWrapLocationSet(newset));
+}
+
+
+/**
+ * xmlXPtrCoveringRange:
+ * @ctxt: the XPointer Parser context
+ * @loc: the location for which the covering range must be computed
+ *
+ * A covering range is a range that wholly encompasses a location
+ * Section 5.3.3. Covering Ranges for All Location Types
+ * http://www.w3.org/TR/xptr#N2267
+ *
+ * Returns a new location or NULL in case of error
+ */
+static xmlXPathObjectPtr
+xmlXPtrCoveringRange(xmlXPathParserContextPtr ctxt, xmlXPathObjectPtr loc) {
+ if (loc == NULL)
+ return(NULL);
+ if ((ctxt == NULL) || (ctxt->context == NULL) ||
+ (ctxt->context->doc == NULL))
+ return(NULL);
+ switch (loc->type) {
+ case XPATH_POINT:
+ return(xmlXPtrNewRange(loc->user, loc->index,
+ loc->user, loc->index));
+ case XPATH_RANGE:
+ if (loc->user2 != NULL) {
+ return(xmlXPtrNewRange(loc->user, loc->index,
+ loc->user2, loc->index2));
+ } else {
+ xmlNodePtr node = (xmlNodePtr) loc->user;
+ if (node == (xmlNodePtr) ctxt->context->doc) {
+ return(xmlXPtrNewRange(node, 0, node,
+ xmlXPtrGetArity(node)));
+ } else {
+ switch (node->type) {
+ case XML_ATTRIBUTE_NODE:
+ /* !!! our model is slightly different than XPath */
+ return(xmlXPtrNewRange(node, 0, node,
+ xmlXPtrGetArity(node)));
+ case XML_ELEMENT_NODE:
+ case XML_TEXT_NODE:
+ case XML_CDATA_SECTION_NODE:
+ case XML_ENTITY_REF_NODE:
+ case XML_PI_NODE:
+ case XML_COMMENT_NODE:
+ case XML_DOCUMENT_NODE:
+ case XML_NOTATION_NODE:
+ case XML_HTML_DOCUMENT_NODE: {
+ int indx = xmlXPtrGetIndex(node);
+
+ node = node->parent;
+ return(xmlXPtrNewRange(node, indx - 1,
+ node, indx + 1));
+ }
+ default:
+ return(NULL);
+ }
+ }
+ }
+ default:
+ TODO /* missed one case ??? */
+ }
+ return(NULL);
+}
+
+/**
+ * xmlXPtrRangeFunction:
+ * @ctxt: the XPointer Parser context
+ * @nargs: the number of args
+ *
+ * Function implementing the range() function 5.4.3
+ * location-set range(location-set )
+ *
+ * The range function returns ranges covering the locations in
+ * the argument location-set. For each location x in the argument
+ * location-set, a range location representing the covering range of
+ * x is added to the result location-set.
+ */
+static void
+xmlXPtrRangeFunction(xmlXPathParserContextPtr ctxt, int nargs) {
+ int i;
+ xmlXPathObjectPtr set;
+ xmlLocationSetPtr oldset;
+ xmlLocationSetPtr newset;
+
+ CHECK_ARITY(1);
+ if ((ctxt->value == NULL) ||
+ ((ctxt->value->type != XPATH_LOCATIONSET) &&
+ (ctxt->value->type != XPATH_NODESET)))
+ XP_ERROR(XPATH_INVALID_TYPE)
+
+ set = valuePop(ctxt);
+ if (set->type == XPATH_NODESET) {
+ xmlXPathObjectPtr tmp;
+
+ /*
+ * First convert to a location set
+ */
+ tmp = xmlXPtrNewLocationSetNodeSet(set->nodesetval);
+ xmlXPathFreeObject(set);
+ if (tmp == NULL)
+ XP_ERROR(XPATH_MEMORY_ERROR)
+ set = tmp;
+ }
+ oldset = (xmlLocationSetPtr) set->user;
+
+ /*
+ * The loop is to compute the covering range for each item and add it
+ */
+ newset = xmlXPtrLocationSetCreate(NULL);
+ if (newset == NULL) {
+ xmlXPathFreeObject(set);
+ XP_ERROR(XPATH_MEMORY_ERROR);
+ }
+ if (oldset != NULL) {
+ for (i = 0;i < oldset->locNr;i++) {
+ xmlXPtrLocationSetAdd(newset,
+ xmlXPtrCoveringRange(ctxt, oldset->locTab[i]));
+ }
+ }
+
+ /*
+ * Save the new value and cleanup
+ */
+ valuePush(ctxt, xmlXPtrWrapLocationSet(newset));
+ xmlXPathFreeObject(set);
+}
+
+/**
+ * xmlXPtrInsideRange:
+ * @ctxt: the XPointer Parser context
+ * @loc: the location for which the inside range must be computed
+ *
+ * A inside range is a range described in the range-inside() description
+ *
+ * Returns a new location or NULL in case of error
+ */
+static xmlXPathObjectPtr
+xmlXPtrInsideRange(xmlXPathParserContextPtr ctxt, xmlXPathObjectPtr loc) {
+ if (loc == NULL)
+ return(NULL);
+ if ((ctxt == NULL) || (ctxt->context == NULL) ||
+ (ctxt->context->doc == NULL))
+ return(NULL);
+ switch (loc->type) {
+ case XPATH_POINT: {
+ xmlNodePtr node = (xmlNodePtr) loc->user;
+ switch (node->type) {
+ case XML_PI_NODE:
+ case XML_COMMENT_NODE:
+ case XML_TEXT_NODE:
+ case XML_CDATA_SECTION_NODE: {
+ if (node->content == NULL) {
+ return(xmlXPtrNewRange(node, 0, node, 0));
+ } else {
+ return(xmlXPtrNewRange(node, 0, node,
+ xmlStrlen(node->content)));
+ }
+ }
+ case XML_ATTRIBUTE_NODE:
+ case XML_ELEMENT_NODE:
+ case XML_ENTITY_REF_NODE:
+ case XML_DOCUMENT_NODE:
+ case XML_NOTATION_NODE:
+ case XML_HTML_DOCUMENT_NODE: {
+ return(xmlXPtrNewRange(node, 0, node,
+ xmlXPtrGetArity(node)));
+ }
+ default:
+ break;
+ }
+ return(NULL);
+ }
+ case XPATH_RANGE: {
+ xmlNodePtr node = (xmlNodePtr) loc->user;
+ if (loc->user2 != NULL) {
+ return(xmlXPtrNewRange(node, loc->index,
+ loc->user2, loc->index2));
+ } else {
+ switch (node->type) {
+ case XML_PI_NODE:
+ case XML_COMMENT_NODE:
+ case XML_TEXT_NODE:
+ case XML_CDATA_SECTION_NODE: {
+ if (node->content == NULL) {
+ return(xmlXPtrNewRange(node, 0, node, 0));
+ } else {
+ return(xmlXPtrNewRange(node, 0, node,
+ xmlStrlen(node->content)));
+ }
+ }
+ case XML_ATTRIBUTE_NODE:
+ case XML_ELEMENT_NODE:
+ case XML_ENTITY_REF_NODE:
+ case XML_DOCUMENT_NODE:
+ case XML_NOTATION_NODE:
+ case XML_HTML_DOCUMENT_NODE: {
+ return(xmlXPtrNewRange(node, 0, node,
+ xmlXPtrGetArity(node)));
+ }
+ default:
+ break;
+ }
+ return(NULL);
+ }
+ }
+ default:
+ TODO /* missed one case ??? */
+ }
+ return(NULL);
+}
+
+/**
+ * xmlXPtrRangeInsideFunction:
+ * @ctxt: the XPointer Parser context
+ * @nargs: the number of args
+ *
+ * Function implementing the range-inside() function 5.4.3
+ * location-set range-inside(location-set )
+ *
+ * The range-inside function returns ranges covering the contents of
+ * the locations in the argument location-set. For each location x in
+ * the argument location-set, a range location is added to the result
+ * location-set. If x is a range location, then x is added to the
+ * result location-set. If x is not a range location, then x is used
+ * as the container location of the start and end points of the range
+ * location to be added; the index of the start point of the range is
+ * zero; if the end point is a character point then its index is the
+ * length of the string-value of x, and otherwise is the number of
+ * location children of x.
+ *
+ */
+static void
+xmlXPtrRangeInsideFunction(xmlXPathParserContextPtr ctxt, int nargs) {
+ int i;
+ xmlXPathObjectPtr set;
+ xmlLocationSetPtr oldset;
+ xmlLocationSetPtr newset;
+
+ CHECK_ARITY(1);
+ if ((ctxt->value == NULL) ||
+ ((ctxt->value->type != XPATH_LOCATIONSET) &&
+ (ctxt->value->type != XPATH_NODESET)))
+ XP_ERROR(XPATH_INVALID_TYPE)
+
+ set = valuePop(ctxt);
+ if (set->type == XPATH_NODESET) {
+ xmlXPathObjectPtr tmp;
+
+ /*
+ * First convert to a location set
+ */
+ tmp = xmlXPtrNewLocationSetNodeSet(set->nodesetval);
+ xmlXPathFreeObject(set);
+ if (tmp == NULL)
+ XP_ERROR(XPATH_MEMORY_ERROR)
+ set = tmp;
+ }
+ oldset = (xmlLocationSetPtr) set->user;
+
+ /*
+ * The loop is to compute the covering range for each item and add it
+ */
+ newset = xmlXPtrLocationSetCreate(NULL);
+ if (newset == NULL) {
+ xmlXPathFreeObject(set);
+ XP_ERROR(XPATH_MEMORY_ERROR);
+ }
+ for (i = 0;i < oldset->locNr;i++) {
+ xmlXPtrLocationSetAdd(newset,
+ xmlXPtrInsideRange(ctxt, oldset->locTab[i]));
+ }
+
+ /*
+ * Save the new value and cleanup
+ */
+ valuePush(ctxt, xmlXPtrWrapLocationSet(newset));
+ xmlXPathFreeObject(set);
+}
+
+/**
+ * xmlXPtrRangeToFunction:
+ * @ctxt: the XPointer Parser context
+ * @nargs: the number of args
+ *
+ * Implement the range-to() XPointer function
+ *
+ * Obsolete. range-to is not a real function but a special type of location
+ * step which is handled in xpath.c.
+ */
+void
+xmlXPtrRangeToFunction(xmlXPathParserContextPtr ctxt,
+ int nargs ATTRIBUTE_UNUSED) {
+ XP_ERROR(XPATH_EXPR_ERROR);
+}
+
+/**
+ * xmlXPtrAdvanceNode:
+ * @cur: the node
+ * @level: incremented/decremented to show level in tree
+ *
+ * Advance to the next element or text node in document order
+ * TODO: add a stack for entering/exiting entities
+ *
+ * Returns -1 in case of failure, 0 otherwise
+ */
+xmlNodePtr
+xmlXPtrAdvanceNode(xmlNodePtr cur, int *level) {
+next:
+ if ((cur == NULL) || (cur->type == XML_NAMESPACE_DECL))
+ return(NULL);
+ if (cur->children != NULL) {
+ cur = cur->children ;
+ if (level != NULL)
+ (*level)++;
+ goto found;
+ }
+skip: /* This label should only be needed if something is wrong! */
+ if (cur->next != NULL) {
+ cur = cur->next;
+ goto found;
+ }
+ do {
+ cur = cur->parent;
+ if (level != NULL)
+ (*level)--;
+ if (cur == NULL) return(NULL);
+ if (cur->next != NULL) {
+ cur = cur->next;
+ goto found;
+ }
+ } while (cur != NULL);
+
+found:
+ if ((cur->type != XML_ELEMENT_NODE) &&
+ (cur->type != XML_TEXT_NODE) &&
+ (cur->type != XML_DOCUMENT_NODE) &&
+ (cur->type != XML_HTML_DOCUMENT_NODE) &&
+ (cur->type != XML_CDATA_SECTION_NODE)) {
+ if (cur->type == XML_ENTITY_REF_NODE) { /* Shouldn't happen */
+ TODO
+ goto skip;
+ }
+ goto next;
+ }
+ return(cur);
+}
+
+/**
+ * xmlXPtrAdvanceChar:
+ * @node: the node
+ * @indx: the indx
+ * @bytes: the number of bytes
+ *
+ * Advance a point of the associated number of bytes (not UTF8 chars)
+ *
+ * Returns -1 in case of failure, 0 otherwise
+ */
+static int
+xmlXPtrAdvanceChar(xmlNodePtr *node, int *indx, int bytes) {
+ xmlNodePtr cur;
+ int pos;
+ int len;
+
+ if ((node == NULL) || (indx == NULL))
+ return(-1);
+ cur = *node;
+ if ((cur == NULL) || (cur->type == XML_NAMESPACE_DECL))
+ return(-1);
+ pos = *indx;
+
+ while (bytes >= 0) {
+ /*
+ * First position to the beginning of the first text node
+ * corresponding to this point
+ */
+ while ((cur != NULL) &&
+ ((cur->type == XML_ELEMENT_NODE) ||
+ (cur->type == XML_DOCUMENT_NODE) ||
+ (cur->type == XML_HTML_DOCUMENT_NODE))) {
+ if (pos > 0) {
+ cur = xmlXPtrGetNthChild(cur, pos);
+ pos = 0;
+ } else {
+ cur = xmlXPtrAdvanceNode(cur, NULL);
+ pos = 0;
+ }
+ }
+
+ if (cur == NULL) {
+ *node = NULL;
+ *indx = 0;
+ return(-1);
+ }
+
+ /*
+ * if there is no move needed return the current value.
+ */
+ if (pos == 0) pos = 1;
+ if (bytes == 0) {
+ *node = cur;
+ *indx = pos;
+ return(0);
+ }
+ /*
+ * We should have a text (or cdata) node ...
+ */
+ len = 0;
+ if ((cur->type != XML_ELEMENT_NODE) &&
+ (cur->content != NULL)) {
+ len = xmlStrlen(cur->content);
+ }
+ if (pos > len) {
+ /* Strange, the indx in the text node is greater than it's len */
+ STRANGE
+ pos = len;
+ }
+ if (pos + bytes >= len) {
+ bytes -= (len - pos);
+ cur = xmlXPtrAdvanceNode(cur, NULL);
+ pos = 0;
+ } else if (pos + bytes < len) {
+ pos += bytes;
+ *node = cur;
+ *indx = pos;
+ return(0);
+ }
+ }
+ return(-1);
+}
+
+/**
+ * xmlXPtrMatchString:
+ * @string: the string to search
+ * @start: the start textnode
+ * @startindex: the start index
+ * @end: the end textnode IN/OUT
+ * @endindex: the end index IN/OUT
+ *
+ * Check whether the document contains @string at the position
+ * (@start, @startindex) and limited by the (@end, @endindex) point
+ *
+ * Returns -1 in case of failure, 0 if not found, 1 if found in which case
+ * (@start, @startindex) will indicate the position of the beginning
+ * of the range and (@end, @endindex) will indicate the end
+ * of the range
+ */
+static int
+xmlXPtrMatchString(const xmlChar *string, xmlNodePtr start, int startindex,
+ xmlNodePtr *end, int *endindex) {
+ xmlNodePtr cur;
+ int pos; /* 0 based */
+ int len; /* in bytes */
+ int stringlen; /* in bytes */
+ int match;
+
+ if (string == NULL)
+ return(-1);
+ if ((start == NULL) || (start->type == XML_NAMESPACE_DECL))
+ return(-1);
+ if ((end == NULL) || (*end == NULL) ||
+ ((*end)->type == XML_NAMESPACE_DECL) || (endindex == NULL))
+ return(-1);
+ cur = start;
+ pos = startindex - 1;
+ stringlen = xmlStrlen(string);
+
+ while (stringlen > 0) {
+ if ((cur == *end) && (pos + stringlen > *endindex))
+ return(0);
+
+ if ((cur->type != XML_ELEMENT_NODE) && (cur->content != NULL)) {
+ len = xmlStrlen(cur->content);
+ if (len >= pos + stringlen) {
+ match = (!xmlStrncmp(&cur->content[pos], string, stringlen));
+ if (match) {
+#ifdef DEBUG_RANGES
+ xmlGenericError(xmlGenericErrorContext,
+ "found range %d bytes at index %d of ->",
+ stringlen, pos + 1);
+ xmlDebugDumpString(stdout, cur->content);
+ xmlGenericError(xmlGenericErrorContext, "\n");
+#endif
+ *end = cur;
+ *endindex = pos + stringlen;
+ return(1);
+ } else {
+ return(0);
+ }
+ } else {
+ int sub = len - pos;
+ match = (!xmlStrncmp(&cur->content[pos], string, sub));
+ if (match) {
+#ifdef DEBUG_RANGES
+ xmlGenericError(xmlGenericErrorContext,
+ "found subrange %d bytes at index %d of ->",
+ sub, pos + 1);
+ xmlDebugDumpString(stdout, cur->content);
+ xmlGenericError(xmlGenericErrorContext, "\n");
+#endif
+ string = &string[sub];
+ stringlen -= sub;
+ } else {
+ return(0);
+ }
+ }
+ }
+ cur = xmlXPtrAdvanceNode(cur, NULL);
+ if (cur == NULL)
+ return(0);
+ pos = 0;
+ }
+ return(1);
+}
+
+/**
+ * xmlXPtrSearchString:
+ * @string: the string to search
+ * @start: the start textnode IN/OUT
+ * @startindex: the start index IN/OUT
+ * @end: the end textnode
+ * @endindex: the end index
+ *
+ * Search the next occurrence of @string within the document content
+ * until the (@end, @endindex) point is reached
+ *
+ * Returns -1 in case of failure, 0 if not found, 1 if found in which case
+ * (@start, @startindex) will indicate the position of the beginning
+ * of the range and (@end, @endindex) will indicate the end
+ * of the range
+ */
+static int
+xmlXPtrSearchString(const xmlChar *string, xmlNodePtr *start, int *startindex,
+ xmlNodePtr *end, int *endindex) {
+ xmlNodePtr cur;
+ const xmlChar *str;
+ int pos; /* 0 based */
+ int len; /* in bytes */
+ xmlChar first;
+
+ if (string == NULL)
+ return(-1);
+ if ((start == NULL) || (*start == NULL) ||
+ ((*start)->type == XML_NAMESPACE_DECL) || (startindex == NULL))
+ return(-1);
+ if ((end == NULL) || (endindex == NULL))
+ return(-1);
+ cur = *start;
+ pos = *startindex - 1;
+ first = string[0];
+
+ while (cur != NULL) {
+ if ((cur->type != XML_ELEMENT_NODE) && (cur->content != NULL)) {
+ len = xmlStrlen(cur->content);
+ while (pos <= len) {
+ if (first != 0) {
+ str = xmlStrchr(&cur->content[pos], first);
+ if (str != NULL) {
+ pos = (str - (xmlChar *)(cur->content));
+#ifdef DEBUG_RANGES
+ xmlGenericError(xmlGenericErrorContext,
+ "found '%c' at index %d of ->",
+ first, pos + 1);
+ xmlDebugDumpString(stdout, cur->content);
+ xmlGenericError(xmlGenericErrorContext, "\n");
+#endif
+ if (xmlXPtrMatchString(string, cur, pos + 1,
+ end, endindex)) {
+ *start = cur;
+ *startindex = pos + 1;
+ return(1);
+ }
+ pos++;
+ } else {
+ pos = len + 1;
+ }
+ } else {
+ /*
+ * An empty string is considered to match before each
+ * character of the string-value and after the final
+ * character.
+ */
+#ifdef DEBUG_RANGES
+ xmlGenericError(xmlGenericErrorContext,
+ "found '' at index %d of ->",
+ pos + 1);
+ xmlDebugDumpString(stdout, cur->content);
+ xmlGenericError(xmlGenericErrorContext, "\n");
+#endif
+ *start = cur;
+ *startindex = pos + 1;
+ *end = cur;
+ *endindex = pos + 1;
+ return(1);
+ }
+ }
+ }
+ if ((cur == *end) && (pos >= *endindex))
+ return(0);
+ cur = xmlXPtrAdvanceNode(cur, NULL);
+ if (cur == NULL)
+ return(0);
+ pos = 1;
+ }
+ return(0);
+}
+
+/**
+ * xmlXPtrGetLastChar:
+ * @node: the node
+ * @index: the index
+ *
+ * Computes the point coordinates of the last char of this point
+ *
+ * Returns -1 in case of failure, 0 otherwise
+ */
+static int
+xmlXPtrGetLastChar(xmlNodePtr *node, int *indx) {
+ xmlNodePtr cur;
+ int pos, len = 0;
+
+ if ((node == NULL) || (*node == NULL) ||
+ ((*node)->type == XML_NAMESPACE_DECL) || (indx == NULL))
+ return(-1);
+ cur = *node;
+ pos = *indx;
+
+ if ((cur->type == XML_ELEMENT_NODE) ||
+ (cur->type == XML_DOCUMENT_NODE) ||
+ (cur->type == XML_HTML_DOCUMENT_NODE)) {
+ if (pos > 0) {
+ cur = xmlXPtrGetNthChild(cur, pos);
+ }
+ }
+ while (cur != NULL) {
+ if (cur->last != NULL)
+ cur = cur->last;
+ else if ((cur->type != XML_ELEMENT_NODE) &&
+ (cur->content != NULL)) {
+ len = xmlStrlen(cur->content);
+ break;
+ } else {
+ return(-1);
+ }
+ }
+ if (cur == NULL)
+ return(-1);
+ *node = cur;
+ *indx = len;
+ return(0);
+}
+
+/**
+ * xmlXPtrGetStartPoint:
+ * @obj: an range
+ * @node: the resulting node
+ * @indx: the resulting index
+ *
+ * read the object and return the start point coordinates.
+ *
+ * Returns -1 in case of failure, 0 otherwise
+ */
+static int
+xmlXPtrGetStartPoint(xmlXPathObjectPtr obj, xmlNodePtr *node, int *indx) {
+ if ((obj == NULL) || (node == NULL) || (indx == NULL))
+ return(-1);
+
+ switch (obj->type) {
+ case XPATH_POINT:
+ *node = obj->user;
+ if (obj->index <= 0)
+ *indx = 0;
+ else
+ *indx = obj->index;
+ return(0);
+ case XPATH_RANGE:
+ *node = obj->user;
+ if (obj->index <= 0)
+ *indx = 0;
+ else
+ *indx = obj->index;
+ return(0);
+ default:
+ break;
+ }
+ return(-1);
+}
+
+/**
+ * xmlXPtrGetEndPoint:
+ * @obj: an range
+ * @node: the resulting node
+ * @indx: the resulting indx
+ *
+ * read the object and return the end point coordinates.
+ *
+ * Returns -1 in case of failure, 0 otherwise
+ */
+static int
+xmlXPtrGetEndPoint(xmlXPathObjectPtr obj, xmlNodePtr *node, int *indx) {
+ if ((obj == NULL) || (node == NULL) || (indx == NULL))
+ return(-1);
+
+ switch (obj->type) {
+ case XPATH_POINT:
+ *node = obj->user;
+ if (obj->index <= 0)
+ *indx = 0;
+ else
+ *indx = obj->index;
+ return(0);
+ case XPATH_RANGE:
+ *node = obj->user;
+ if (obj->index <= 0)
+ *indx = 0;
+ else
+ *indx = obj->index;
+ return(0);
+ default:
+ break;
+ }
+ return(-1);
+}
+
+/**
+ * xmlXPtrStringRangeFunction:
+ * @ctxt: the XPointer Parser context
+ * @nargs: the number of args
+ *
+ * Function implementing the string-range() function
+ * range as described in 5.4.2
+ *
+ * ------------------------------
+ * [Definition: For each location in the location-set argument,
+ * string-range returns a set of string ranges, a set of substrings in a
+ * string. Specifically, the string-value of the location is searched for
+ * substrings that match the string argument, and the resulting location-set
+ * will contain a range location for each non-overlapping match.]
+ * An empty string is considered to match before each character of the
+ * string-value and after the final character. Whitespace in a string
+ * is matched literally, with no normalization except that provided by
+ * XML for line ends. The third argument gives the position of the first
+ * character to be in the resulting range, relative to the start of the
+ * match. The default value is 1, which makes the range start immediately
+ * before the first character of the matched string. The fourth argument
+ * gives the number of characters in the range; the default is that the
+ * range extends to the end of the matched string.
+ *
+ * Element boundaries, as well as entire embedded nodes such as processing
+ * instructions and comments, are ignored as defined in [XPath].
+ *
+ * If the string in the second argument is not found in the string-value
+ * of the location, or if a value in the third or fourth argument indicates
+ * a string that is beyond the beginning or end of the document, the
+ * expression fails.
+ *
+ * The points of the range-locations in the returned location-set will
+ * all be character points.
+ * ------------------------------
+ */
+static void
+xmlXPtrStringRangeFunction(xmlXPathParserContextPtr ctxt, int nargs) {
+ int i, startindex, endindex = 0, fendindex;
+ xmlNodePtr start, end = 0, fend;
+ xmlXPathObjectPtr set;
+ xmlLocationSetPtr oldset;
+ xmlLocationSetPtr newset;
+ xmlXPathObjectPtr string;
+ xmlXPathObjectPtr position = NULL;
+ xmlXPathObjectPtr number = NULL;
+ int found, pos = 0, num = 0;
+
+ /*
+ * Grab the arguments
+ */
+ if ((nargs < 2) || (nargs > 4))
+ XP_ERROR(XPATH_INVALID_ARITY);
+
+ if (nargs >= 4) {
+ CHECK_TYPE(XPATH_NUMBER);
+ number = valuePop(ctxt);
+ if (number != NULL)
+ num = (int) number->floatval;
+ }
+ if (nargs >= 3) {
+ CHECK_TYPE(XPATH_NUMBER);
+ position = valuePop(ctxt);
+ if (position != NULL)
+ pos = (int) position->floatval;
+ }
+ CHECK_TYPE(XPATH_STRING);
+ string = valuePop(ctxt);
+ if ((ctxt->value == NULL) ||
+ ((ctxt->value->type != XPATH_LOCATIONSET) &&
+ (ctxt->value->type != XPATH_NODESET)))
+ XP_ERROR(XPATH_INVALID_TYPE)
+
+ set = valuePop(ctxt);
+ newset = xmlXPtrLocationSetCreate(NULL);
+ if (newset == NULL) {
+ xmlXPathFreeObject(set);
+ XP_ERROR(XPATH_MEMORY_ERROR);
+ }
+ if (set->nodesetval == NULL) {
+ goto error;
+ }
+ if (set->type == XPATH_NODESET) {
+ xmlXPathObjectPtr tmp;
+
+ /*
+ * First convert to a location set
+ */
+ tmp = xmlXPtrNewLocationSetNodeSet(set->nodesetval);
+ xmlXPathFreeObject(set);
+ if (tmp == NULL)
+ XP_ERROR(XPATH_MEMORY_ERROR)
+ set = tmp;
+ }
+ oldset = (xmlLocationSetPtr) set->user;
+
+ /*
+ * The loop is to search for each element in the location set
+ * the list of location set corresponding to that search
+ */
+ for (i = 0;i < oldset->locNr;i++) {
+#ifdef DEBUG_RANGES
+ xmlXPathDebugDumpObject(stdout, oldset->locTab[i], 0);
+#endif
+
+ xmlXPtrGetStartPoint(oldset->locTab[i], &start, &startindex);
+ xmlXPtrGetEndPoint(oldset->locTab[i], &end, &endindex);
+ xmlXPtrAdvanceChar(&start, &startindex, 0);
+ xmlXPtrGetLastChar(&end, &endindex);
+
+#ifdef DEBUG_RANGES
+ xmlGenericError(xmlGenericErrorContext,
+ "from index %d of ->", startindex);
+ xmlDebugDumpString(stdout, start->content);
+ xmlGenericError(xmlGenericErrorContext, "\n");
+ xmlGenericError(xmlGenericErrorContext,
+ "to index %d of ->", endindex);
+ xmlDebugDumpString(stdout, end->content);
+ xmlGenericError(xmlGenericErrorContext, "\n");
+#endif
+ do {
+ fend = end;
+ fendindex = endindex;
+ found = xmlXPtrSearchString(string->stringval, &start, &startindex,
+ &fend, &fendindex);
+ if (found == 1) {
+ if (position == NULL) {
+ xmlXPtrLocationSetAdd(newset,
+ xmlXPtrNewRange(start, startindex, fend, fendindex));
+ } else if (xmlXPtrAdvanceChar(&start, &startindex,
+ pos - 1) == 0) {
+ if ((number != NULL) && (num > 0)) {
+ int rindx;
+ xmlNodePtr rend;
+ rend = start;
+ rindx = startindex - 1;
+ if (xmlXPtrAdvanceChar(&rend, &rindx,
+ num) == 0) {
+ xmlXPtrLocationSetAdd(newset,
+ xmlXPtrNewRange(start, startindex,
+ rend, rindx));
+ }
+ } else if ((number != NULL) && (num <= 0)) {
+ xmlXPtrLocationSetAdd(newset,
+ xmlXPtrNewRange(start, startindex,
+ start, startindex));
+ } else {
+ xmlXPtrLocationSetAdd(newset,
+ xmlXPtrNewRange(start, startindex,
+ fend, fendindex));
+ }
+ }
+ start = fend;
+ startindex = fendindex;
+ if (string->stringval[0] == 0)
+ startindex++;
+ }
+ } while (found == 1);
+ }
+
+ /*
+ * Save the new value and cleanup
+ */
+error:
+ valuePush(ctxt, xmlXPtrWrapLocationSet(newset));
+ xmlXPathFreeObject(set);
+ xmlXPathFreeObject(string);
+ if (position) xmlXPathFreeObject(position);
+ if (number) xmlXPathFreeObject(number);
+}
+
+/**
+ * xmlXPtrEvalRangePredicate:
+ * @ctxt: the XPointer Parser context
+ *
+ * [8] Predicate ::= '[' PredicateExpr ']'
+ * [9] PredicateExpr ::= Expr
+ *
+ * Evaluate a predicate as in xmlXPathEvalPredicate() but for
+ * a Location Set instead of a node set
+ */
+void
+xmlXPtrEvalRangePredicate(xmlXPathParserContextPtr ctxt) {
+ const xmlChar *cur;
+ xmlXPathObjectPtr res;
+ xmlXPathObjectPtr obj, tmp;
+ xmlLocationSetPtr newset = NULL;
+ xmlLocationSetPtr oldset;
+ int i;
+
+ if (ctxt == NULL) return;
+
+ SKIP_BLANKS;
+ if (CUR != '[') {
+ XP_ERROR(XPATH_INVALID_PREDICATE_ERROR);
+ }
+ NEXT;
+ SKIP_BLANKS;
+
+ /*
+ * Extract the old set, and then evaluate the result of the
+ * expression for all the element in the set. use it to grow
+ * up a new set.
+ */
+ CHECK_TYPE(XPATH_LOCATIONSET);
+ obj = valuePop(ctxt);
+ oldset = obj->user;
+ ctxt->context->node = NULL;
+
+ if ((oldset == NULL) || (oldset->locNr == 0)) {
+ ctxt->context->contextSize = 0;
+ ctxt->context->proximityPosition = 0;
+ xmlXPathEvalExpr(ctxt);
+ res = valuePop(ctxt);
+ if (res != NULL)
+ xmlXPathFreeObject(res);
+ valuePush(ctxt, obj);
+ CHECK_ERROR;
+ } else {
+ /*
+ * Save the expression pointer since we will have to evaluate
+ * it multiple times. Initialize the new set.
+ */
+ cur = ctxt->cur;
+ newset = xmlXPtrLocationSetCreate(NULL);
+
+ for (i = 0; i < oldset->locNr; i++) {
+ ctxt->cur = cur;
+
+ /*
+ * Run the evaluation with a node list made of a single item
+ * in the nodeset.
+ */
+ ctxt->context->node = oldset->locTab[i]->user;
+ tmp = xmlXPathNewNodeSet(ctxt->context->node);
+ valuePush(ctxt, tmp);
+ ctxt->context->contextSize = oldset->locNr;
+ ctxt->context->proximityPosition = i + 1;
+
+ xmlXPathEvalExpr(ctxt);
+ CHECK_ERROR;
+
+ /*
+ * The result of the evaluation need to be tested to
+ * decided whether the filter succeeded or not
+ */
+ res = valuePop(ctxt);
+ if (xmlXPathEvaluatePredicateResult(ctxt, res)) {
+ xmlXPtrLocationSetAdd(newset,
+ xmlXPathObjectCopy(oldset->locTab[i]));
+ }
+
+ /*
+ * Cleanup
+ */
+ if (res != NULL)
+ xmlXPathFreeObject(res);
+ if (ctxt->value == tmp) {
+ res = valuePop(ctxt);
+ xmlXPathFreeObject(res);
+ }
+
+ ctxt->context->node = NULL;
+ }
+
+ /*
+ * The result is used as the new evaluation set.
+ */
+ xmlXPathFreeObject(obj);
+ ctxt->context->node = NULL;
+ ctxt->context->contextSize = -1;
+ ctxt->context->proximityPosition = -1;
+ valuePush(ctxt, xmlXPtrWrapLocationSet(newset));
+ }
+ if (CUR != ']') {
+ XP_ERROR(XPATH_INVALID_PREDICATE_ERROR);
+ }
+
+ NEXT;
+ SKIP_BLANKS;
+}
+
+#define bottom_xpointer
+#include "elfgcchack.h"
+#endif
+
generated by cgit