libxml-xpath.html

xml开源解析代码.版本为libxml2-2.6.29,可支持GB3212.网络消息发送XML时很有用.

<pre class="programlisting"><a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a>	<a href="#xmlXPathEval">xmlXPathEval</a>	(const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * str, <br />					 <a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctx)</pre>
<pre class="programlisting"><a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a>	<a href="#xmlXPathEvalExpression">xmlXPathEvalExpression</a>	(const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * str, <br />						 <a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctxt)</pre>
<pre class="programlisting">Function type: <a href="#xmlXPathEvalFunc">xmlXPathEvalFunc</a>
void	<a href="#xmlXPathEvalFunc">xmlXPathEvalFunc</a>		(<a href="libxml-xpath.html#xmlXPathParserContextPtr">xmlXPathParserContextPtr</a> ctxt, <br />					 int nargs)
</pre>
<pre class="programlisting">int	<a href="#xmlXPathEvalPredicate">xmlXPathEvalPredicate</a>		(<a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctxt, <br />					 <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> res)</pre>
<pre class="programlisting">void	<a href="#xmlXPathFreeCompExpr">xmlXPathFreeCompExpr</a>		(<a href="libxml-xpath.html#xmlXPathCompExprPtr">xmlXPathCompExprPtr</a> comp)</pre>
<pre class="programlisting">void	<a href="#xmlXPathFreeContext">xmlXPathFreeContext</a>		(<a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctxt)</pre>
<pre class="programlisting">void	<a href="#xmlXPathFreeNodeSet">xmlXPathFreeNodeSet</a>		(<a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> obj)</pre>
<pre class="programlisting">void	<a href="#xmlXPathFreeNodeSetList">xmlXPathFreeNodeSetList</a>		(<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> obj)</pre>
<pre class="programlisting">void	<a href="#xmlXPathFreeObject">xmlXPathFreeObject</a>		(<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> obj)</pre>
<pre class="programlisting">Function type: <a href="#xmlXPathFuncLookupFunc">xmlXPathFuncLookupFunc</a>
<a href="libxml-xpath.html#xmlXPathFunction">xmlXPathFunction</a>	<a href="#xmlXPathFuncLookupFunc">xmlXPathFuncLookupFunc</a>	(void * ctxt, <br />						 const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * name, <br />						 const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * ns_uri)
</pre>
<pre class="programlisting">Function type: <a href="#xmlXPathFunction">xmlXPathFunction</a>
void	<a href="#xmlXPathFunction">xmlXPathFunction</a>		(<a href="libxml-xpath.html#xmlXPathParserContextPtr">xmlXPathParserContextPtr</a> ctxt, <br />					 int nargs)
</pre>
<pre class="programlisting">void	<a href="#xmlXPathInit">xmlXPathInit</a>			(void)</pre>
<pre class="programlisting">int	<a href="#xmlXPathIsInf">xmlXPathIsInf</a>			(double val)</pre>
<pre class="programlisting">int	<a href="#xmlXPathIsNaN">xmlXPathIsNaN</a>			(double val)</pre>
<pre class="programlisting"><a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a>	<a href="#xmlXPathNewContext">xmlXPathNewContext</a>	(<a href="libxml-tree.html#xmlDocPtr">xmlDocPtr</a> doc)</pre>
<pre class="programlisting"><a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a>	<a href="#xmlXPathNodeSetCreate">xmlXPathNodeSetCreate</a>	(<a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> val)</pre>
<pre class="programlisting"><a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a>	<a href="#xmlXPathObjectCopy">xmlXPathObjectCopy</a>	(<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> val)</pre>
<pre class="programlisting">long	<a href="#xmlXPathOrderDocElems">xmlXPathOrderDocElems</a>		(<a href="libxml-tree.html#xmlDocPtr">xmlDocPtr</a> doc)</pre>
<pre class="programlisting">Function type: <a href="#xmlXPathVariableLookupFunc">xmlXPathVariableLookupFunc</a>
<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a>	<a href="#xmlXPathVariableLookupFunc">xmlXPathVariableLookupFunc</a>	(void * ctxt, <br />							 const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * name, <br />							 const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * ns_uri)
</pre>
<h2>Description</h2>
<h3><a name="XML_XPATH_CHECKNS" id="XML_XPATH_CHECKNS"></a>Macro: XML_XPATH_CHECKNS</h3><pre>#define XML_XPATH_CHECKNS</pre><p>check namespaces at compilation</p>
<h3><a name="XML_XPATH_NOVAR" id="XML_XPATH_NOVAR"></a>Macro: XML_XPATH_NOVAR</h3><pre>#define XML_XPATH_NOVAR</pre><p>forbid variables in expression</p>
<h3><a name="xmlXPathNodeSetGetLength" id="xmlXPathNodeSetGetLength"></a>Macro: xmlXPathNodeSetGetLength</h3><pre>#define xmlXPathNodeSetGetLength</pre><p>Implement a functionality similar to the DOM NodeList.length. Returns the number of nodes in the node-set.</p>
<h3><a name="xmlXPathNodeSetIsEmpty" id="xmlXPathNodeSetIsEmpty"></a>Macro: xmlXPathNodeSetIsEmpty</h3><pre>#define xmlXPathNodeSetIsEmpty</pre><p>Checks whether @ns is empty or not. Returns %TRUE if @ns is an empty node-set.</p>
<h3><a name="xmlXPathNodeSetItem" id="xmlXPathNodeSetItem"></a>Macro: xmlXPathNodeSetItem</h3><pre>#define xmlXPathNodeSetItem</pre><p>Implements a functionality similar to the DOM NodeList.item(). Returns the <a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> at the given @index in @ns or NULL if @index is out of range (0 to length-1)</p>
<h3><a name="xmlNodeSet" id="xmlNodeSet">Structure xmlNodeSet</a></h3><pre class="programlisting">Structure xmlNodeSet<br />struct _xmlNodeSet {
    int	nodeNr	: number of nodes in the set
    int	nodeMax	: size of the array as allocated
    <a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> *	nodeTab	: array of nodes in no particular order @
}</pre><h3><a name="xmlXPathAxis" id="xmlXPathAxis">Structure xmlXPathAxis</a></h3><pre class="programlisting">Structure xmlXPathAxis<br />struct _xmlXPathAxis {
    const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> *	name	: the axis name
    <a href="libxml-xpath.html#xmlXPathAxisFunc">xmlXPathAxisFunc</a>	func	: the search function
}</pre><h3><a name="xmlXPathCompExpr" id="xmlXPathCompExpr">Structure xmlXPathCompExpr</a></h3><pre class="programlisting">Structure xmlXPathCompExpr<br />struct _xmlXPathCompExpr {
The content of this structure is not made public by the API.
}</pre><h3><a name="xmlXPathContext" id="xmlXPathContext">Structure xmlXPathContext</a></h3><pre class="programlisting">Structure xmlXPathContext<br />struct _xmlXPathContext {
    <a href="libxml-tree.html#xmlDocPtr">xmlDocPtr</a>	doc	: The current document
    <a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a>	node	: The current node
    int	nb_variables_unused	: unused (hash table)
    int	max_variables_unused	: unused (hash table)
    <a href="libxml-hash.html#xmlHashTablePtr">xmlHashTablePtr</a>	varHash	: Hash table of defined variables
    int	nb_types	: number of defined types
    int	max_types	: max number of types
    <a href="libxml-xpath.html#xmlXPathTypePtr">xmlXPathTypePtr</a>	types	: Array of defined types
    int	nb_funcs_unused	: unused (hash table)
    int	max_funcs_unused	: unused (hash table)
    <a href="libxml-hash.html#xmlHashTablePtr">xmlHashTablePtr</a>	funcHash	: Hash table of defined funcs
    int	nb_axis	: number of defined axis
    int	max_axis	: max number of axis
    <a href="libxml-xpath.html#xmlXPathAxisPtr">xmlXPathAxisPtr</a>	axis	: Array of defined axis the namespace nod
    <a href="libxml-tree.html#xmlNsPtr">xmlNsPtr</a> *	namespaces	: Array of namespaces
    int	nsNr	: number of namespace in scope
    void *	user	: function to free extra variables
    int	contextSize	: the context size
    int	proximityPosition	: the proximity position extra stuff for