xpointer

xpointer - API to handle XML Pointers

API to handle XML Pointers Base implementation was made accordingly to W3C Candidate Recommendation 7 June 2000

Author(s): Daniel Veillard

Synopsis

typedef struct _xmlLocationSet xmlLocationSet;
typedef xmlLocationSet * xmlLocationSetPtr;
xmlXPathObjectPtr	xmlXPtrNewRange	(xmlNodePtr start, 
int startindex,
xmlNodePtr end,
int endindex); void xmlXPtrFreeLocationSet (xmlLocationSetPtr obj); xmlXPathObjectPtr xmlXPtrWrapLocationSet (xmlLocationSetPtr val); xmlNodePtr xmlXPtrBuildNodeList (xmlXPathObjectPtr obj); xmlXPathObjectPtr xmlXPtrEval (const xmlChar * str,
xmlXPathContextPtr ctx); xmlXPathObjectPtr xmlXPtrNewRangeNodes (xmlNodePtr start,
xmlNodePtr end); void xmlXPtrLocationSetAdd (xmlLocationSetPtr cur,
xmlXPathObjectPtr val); void xmlXPtrRangeToFunction (xmlXPathParserContextPtr ctxt,
int nargs); xmlXPathObjectPtr xmlXPtrNewCollapsedRange (xmlNodePtr start); xmlXPathObjectPtr xmlXPtrNewRangePoints (xmlXPathObjectPtr start,
xmlXPathObjectPtr end); xmlXPathObjectPtr xmlXPtrNewLocationSetNodeSet (xmlNodeSetPtr set); xmlXPathObjectPtr xmlXPtrNewRangePointNode (xmlXPathObjectPtr start,
xmlNodePtr end); xmlLocationSetPtr xmlXPtrLocationSetCreate (xmlXPathObjectPtr val); xmlXPathObjectPtr xmlXPtrNewRangeNodeObject (xmlNodePtr start,
xmlXPathObjectPtr end); xmlXPathContextPtr xmlXPtrNewContext (xmlDocPtr doc,
xmlNodePtr here,
xmlNodePtr origin); void xmlXPtrLocationSetRemove (xmlLocationSetPtr cur,
int val); xmlXPathObjectPtr xmlXPtrNewRangeNodePoint (xmlNodePtr start,
xmlXPathObjectPtr end); void xmlXPtrLocationSetDel (xmlLocationSetPtr cur,
xmlXPathObjectPtr val); xmlLocationSetPtr xmlXPtrLocationSetMerge (xmlLocationSetPtr val1,
xmlLocationSetPtr val2); void xmlXPtrEvalRangePredicate (xmlXPathParserContextPtr ctxt); xmlXPathObjectPtr xmlXPtrNewLocationSetNodes (xmlNodePtr start,
xmlNodePtr end);

Description

Details

Structure xmlLocationSet

struct _xmlLocationSet {
    int	locNr	: number of locations in the set
    int	locMax	: size of the array as allocated
    xmlXPathObjectPtr *	locTab	: array of locations
} xmlLocationSet;


Typedef xmlLocationSetPtr

xmlLocationSet * xmlLocationSetPtr;


xmlXPtrBuildNodeList ()

xmlNodePtr	xmlXPtrBuildNodeList	(xmlXPathObjectPtr obj)

Build a node list tree copy of the XPointer result. This will drop Attributes and Namespace declarations.

obj:the XPointer result from the evaluation.
Returns:an xmlNodePtr list or NULL. the caller has to free the node tree.

xmlXPtrEval ()

xmlXPathObjectPtr	xmlXPtrEval	(const xmlChar * str, 
xmlXPathContextPtr ctx)

Evaluate the XPath Location Path in the given context.

str:the XPointer expression
ctx:the XPointer context
Returns:the xmlXPathObjectPtr resulting from the evaluation or NULL. the caller has to free the object.

xmlXPtrEvalRangePredicate ()

void	xmlXPtrEvalRangePredicate	(xmlXPathParserContextPtr ctxt)

[8] Predicate ::= '[' PredicateExpr ']' [9] PredicateExpr ::= Expr Evaluate a predicate as in xmlXPathEvalPredicate() but for a Location Set instead of a node set

ctxt:the XPointer Parser context

xmlXPtrFreeLocationSet ()

void	xmlXPtrFreeLocationSet		(xmlLocationSetPtr obj)

Free the LocationSet compound (not the actual ranges !).

obj:the xmlLocationSetPtr to free

xmlXPtrLocationSetAdd ()

void	xmlXPtrLocationSetAdd		(xmlLocationSetPtr cur, 
xmlXPathObjectPtr val)

add a new xmlXPathObjectPtr to an existing LocationSet If the location already exist in the set @val is freed.

cur:the initial range set
val:a new xmlXPathObjectPtr

xmlXPtrLocationSetCreate ()

xmlLocationSetPtr	xmlXPtrLocationSetCreate	(xmlXPathObjectPtr val)

Create a new xmlLocationSetPtr of type double and of value @val

val:an initial xmlXPathObjectPtr, or NULL
Returns:the newly created object.

xmlXPtrLocationSetDel ()

void	xmlXPtrLocationSetDel		(xmlLocationSetPtr cur, 
xmlXPathObjectPtr val)

Removes an xmlXPathObjectPtr from an existing LocationSet

cur:the initial range set
val:an xmlXPathObjectPtr

xmlXPtrLocationSetMerge ()

xmlLocationSetPtr	xmlXPtrLocationSetMerge	(xmlLocationSetPtr val1, 
xmlLocationSetPtr val2)

Merges two rangesets, all ranges from @val2 are added to @val1

val1:the first LocationSet
val2:the second LocationSet
Returns:val1 once extended or NULL in case of error.

xmlXPtrLocationSetRemove ()

void	xmlXPtrLocationSetRemove	(xmlLocationSetPtr cur, 
int val)

Removes an entry from an existing LocationSet list.

cur:the initial range set
val:the index to remove

xmlXPtrNewCollapsedRange ()

xmlXPathObjectPtr	xmlXPtrNewCollapsedRange	(xmlNodePtr start)

Create a new xmlXPathObjectPtr of type range using a single nodes

start:the starting and ending node
Returns:the newly created object.

xmlXPtrNewContext ()

xmlXPathContextPtr	xmlXPtrNewContext	(xmlDocPtr doc, 
xmlNodePtr here,
xmlNodePtr origin)

Create a new XPointer context

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.
Returns:the xmlXPathContext just allocated.

xmlXPtrNewLocationSetNodeSet ()

xmlXPathObjectPtr	xmlXPtrNewLocationSetNodeSet	(xmlNodeSetPtr set)

Create a new xmlXPathObjectPtr of type LocationSet and initialize it with all the nodes from @set

set:a node set
Returns:the newly created object.

xmlXPtrNewLocationSetNodes ()

xmlXPathObjectPtr	xmlXPtrNewLocationSetNodes	(xmlNodePtr start, 
xmlNodePtr end)

Create a new xmlXPathObjectPtr of type LocationSet and initialize it with the single range made of the two nodes @start and @end

start:the start NodePtr value
end:the end NodePtr value or NULL
Returns:the newly created object.

xmlXPtrNewRange ()

xmlXPathObjectPtr	xmlXPtrNewRange	(xmlNodePtr start, 
int startindex,
xmlNodePtr end,
int endindex)

Create a new xmlXPathObjectPtr of type range

start:the starting node
startindex:the start index
end:the ending point
endindex:the ending index
Returns:the newly created object.

xmlXPtrNewRangeNodeObject ()

xmlXPathObjectPtr	xmlXPtrNewRangeNodeObject	(xmlNodePtr start, 
xmlXPathObjectPtr end)

Create a new xmlXPathObjectPtr of type range from a not to an object

start:the starting node
end:the ending object
Returns:the newly created object.

xmlXPtrNewRangeNodePoint ()

xmlXPathObjectPtr	xmlXPtrNewRangeNodePoint	(xmlNodePtr start, 
xmlXPathObjectPtr end)

Create a new xmlXPathObjectPtr of type range from a node to a point

start:the starting node
end:the ending point
Returns:the newly created object.

xmlXPtrNewRangeNodes ()

xmlXPathObjectPtr	xmlXPtrNewRangeNodes	(xmlNodePtr start, 
xmlNodePtr end)

Create a new xmlXPathObjectPtr of type range using 2 nodes

start:the starting node
end:the ending node
Returns:the newly created object.

xmlXPtrNewRangePointNode ()

xmlXPathObjectPtr	xmlXPtrNewRangePointNode	(xmlXPathObjectPtr start, 
xmlNodePtr end)

Create a new xmlXPathObjectPtr of type range from a point to a node

start:the starting point
end:the ending node
Returns:the newly created object.

xmlXPtrNewRangePoints ()

xmlXPathObjectPtr	xmlXPtrNewRangePoints	(xmlXPathObjectPtr start, 
xmlXPathObjectPtr end)

Create a new xmlXPathObjectPtr of type range using 2 Points

start:the starting point
end:the ending point
Returns:the newly created object.

xmlXPtrRangeToFunction ()

void	xmlXPtrRangeToFunction		(xmlXPathParserContextPtr ctxt, 
int nargs)

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.

ctxt:the XPointer Parser context
nargs:the number of args

xmlXPtrWrapLocationSet ()

xmlXPathObjectPtr	xmlXPtrWrapLocationSet	(xmlLocationSetPtr val)

Wrap the LocationSet @val in a new xmlXPathObjectPtr

val:the LocationSet value
Returns:the newly created object.