libxml2-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.

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        <div class="refsect2" lang="en"><h3><a name="xmlXPathNodeSetIsEmpty">Macro </a>xmlXPathNodeSetIsEmpty</h3><pre class="programlisting">#define <a href="#xmlXPathNodeSetIsEmpty">xmlXPathNodeSetIsEmpty</a>(ns);
</pre><p>Checks whether @ns is empty or not. Returns %TRUE if @ns is an empty node-set.</p><div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>ns</tt></i>:</span></td><td>a node-set</td></tr></tbody></table></div>
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        <div class="refsect2" lang="en"><h3><a name="xmlXPathNodeSetItem">Macro </a>xmlXPathNodeSetItem</h3><pre class="programlisting">#define <a href="#xmlXPathNodeSetItem">xmlXPathNodeSetItem</a>(ns, index);
</pre><p>Implements a functionality similar to the DOM NodeList.item(). Returns the <a href="libxml2-tree.html#xmlNodePtr">xmlNodePtr</a> at the given @index in @ns or NULL if @index is out of range (0 to length-1)</p><div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>ns</tt></i>:</span></td><td>a node-set</td></tr><tr><td><span class="term"><i><tt>index</tt></i>:</span></td><td>index of a node in the set</td></tr></tbody></table></div>
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        <div class="refsect2" lang="en"><h3><a name="xmlNodeSet">Structure </a>xmlNodeSet</h3><pre class="programlisting">struct _xmlNodeSet {
    int	nodeNr	: number of nodes in the set
    int	nodeMax	: size of the array as allocated
    <a href="libxml2-tree.html#xmlNodePtr">xmlNodePtr</a> *	nodeTab	: array of nodes in no particular order @@ with_ns to check wether name
} xmlNodeSet;
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        <div class="refsect2" lang="en"><h3><a name="xmlNodeSetPtr">Typedef </a>xmlNodeSetPtr</h3><pre class="programlisting"><a href="libxml2-xpath.html#xmlNodeSet">xmlNodeSet</a> * xmlNodeSetPtr;
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        <div class="refsect2" lang="en"><h3><a name="xmlXPathAxis">Structure </a>xmlXPathAxis</h3><pre class="programlisting">struct _xmlXPathAxis {
    const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> *	name	: the axis name
    <a href="libxml2-xpath.html#xmlXPathAxisFunc">xmlXPathAxisFunc</a>	func	: the search function
} xmlXPathAxis;
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        <div class="refsect2" lang="en"><h3><a name="xmlXPathAxisPtr">Typedef </a>xmlXPathAxisPtr</h3><pre class="programlisting"><a href="libxml2-xpath.html#xmlXPathAxis">xmlXPathAxis</a> * xmlXPathAxisPtr;
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        <div class="refsect2" lang="en"><h3><a name="xmlXPathCompExpr">Structure </a>xmlXPathCompExpr</h3><pre class="programlisting">struct _xmlXPathCompExpr {
The content of this structure is not made public by the API.
} xmlXPathCompExpr;
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        <div class="refsect2" lang="en"><h3><a name="xmlXPathCompExprPtr">Typedef </a>xmlXPathCompExprPtr</h3><pre class="programlisting"><a href="libxml2-xpath.html#xmlXPathCompExpr">xmlXPathCompExpr</a> * xmlXPathCompExprPtr;
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        <div class="refsect2" lang="en"><h3><a name="xmlXPathContext">Structure </a>xmlXPathContext</h3><pre class="programlisting">struct _xmlXPathContext {
    <a href="libxml2-tree.html#xmlDocPtr">xmlDocPtr</a>	doc	: The current document
    <a href="libxml2-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="libxml2-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="libxml2-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="libxml2-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="libxml2-xpath.html#xmlXPathAxisPtr">xmlXPathAxisPtr</a>	axis	: Array of defined axis the namespace nodes of the context node
    <a href="libxml2-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 XPointer
    int	xptr	: is this an XPointer context?
    <a href="libxml2-tree.html#xmlNodePtr">xmlNodePtr</a>	here	: for here()
    <a href="libxml2-tree.html#xmlNodePtr">xmlNodePtr</a>	origin	: for origin() the set of namespace declarations in scope for the expre
    <a href="libxml2-hash.html#xmlHashTablePtr">xmlHashTablePtr</a>	nsHash	: The namespaces hash table
    <a href="libxml2-xpath.html#xmlXPathVariableLookupFunc">xmlXPathVariableLookupFunc</a>	varLookupFunc	: variable lookup func
    void *	varLookupData	: variable lookup data Possibility to link in an extra item
    void *	extra	: needed for XSLT The function name and URI when calling a function
    const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> *	function
    const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> *	functionURI	: function lookup function and data
    <a href="libxml2-xpath.html#xmlXPathFuncLookupFunc">xmlXPathFuncLookupFunc</a>	funcLookupFunc	: function lookup func
    void *	funcLookupData	: function lookup data temporary namespace lists kept for walking the n
    <a href="libxml2-tree.html#xmlNsPtr">xmlNsPtr</a> *	tmpNsList	: Array of namespaces
    int	tmpNsNr	: number of namespaces in scope error reporting mechanism
    void *	userData	: user specific data block
    <a href="libxml2-xmlerror.html#xmlStructuredErrorFunc">xmlStructuredErrorFunc</a>	error	: the callback in case of errors
    <a href="libxml2-xmlerror.html#xmlError">xmlError</a>	lastError	: the last error
    <a href="libxml2-tree.html#xmlNodePtr">xmlNodePtr</a>	debugNode	: the source node XSLT dictionary
    <a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a>	dict	: dictionary if any
    int	flags	: flags to control compilation Cache for reusal of XPath objects
    void *	cache
} xmlXPathContext;
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        <div class="refsect2" lang="en"><h3><a name="xmlXPathContextPtr">Typedef </a>xmlXPathContextPtr</h3><pre class="programlisting"><a href="libxml2-xpath.html#xmlXPathContext">xmlXPathContext</a> * xmlXPathContextPtr;
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        <div class="refsect2" lang="en"><h3><a name="xmlXPathError">Enum </a>xmlXPathError</h3><pre class="programlisting">enum <a href="#xmlXPathError">xmlXPathError</a> {
    <a name="XPATH_EXPRESSION_OK">XPATH_EXPRESSION_OK</a> = 0
    <a name="XPATH_NUMBER_ERROR">XPATH_NUMBER_ERROR</a> = 1
    <a name="XPATH_UNFINISHED_LITERAL_ERROR">XPATH_UNFINISHED_LITERAL_ERROR</a> = 2
    <a name="XPATH_START_LITERAL_ERROR">XPATH_START_LITERAL_ERROR</a> = 3
    <a name="XPATH_VARIABLE_REF_ERROR">XPATH_VARIABLE_REF_ERROR</a> = 4
    <a name="XPATH_UNDEF_VARIABLE_ERROR">XPATH_UNDEF_VARIABLE_ERROR</a> = 5
    <a name="XPATH_INVALID_PREDICATE_ERROR">XPATH_INVALID_PREDICATE_ERROR</a> = 6
    <a name="XPATH_EXPR_ERROR">XPATH_EXPR_ERROR</a> = 7
    <a name="XPATH_UNCLOSED_ERROR">XPATH_UNCLOSED_ERROR</a> = 8
    <a name="XPATH_UNKNOWN_FUNC_ERROR">XPATH_UNKNOWN_FUNC_ERROR</a> = 9
    <a name="XPATH_INVALID_OPERAND">XPATH_INVALID_OPERAND</a> = 10
    <a name="XPATH_INVALID_TYPE">XPATH_INVALID_TYPE</a> = 11
    <a name="XPATH_INVALID_ARITY">XPATH_INVALID_ARITY</a> = 12
    <a name="XPATH_INVALID_CTXT_SIZE">XPATH_INVALID_CTXT_SIZE</a> = 13
    <a name="XPATH_INVALID_CTXT_POSITION">XPATH_INVALID_CTXT_POSITION</a> = 14
    <a name="XPATH_MEMORY_ERROR">XPATH_MEMORY_ERROR</a> = 15
    <a name="XPTR_SYNTAX_ERROR">XPTR_SYNTAX_ERROR</a> = 16
    <a name="XPTR_RESOURCE_ERROR">XPTR_RESOURCE_ERROR</a> = 17
    <a name="XPTR_SUB_RESOURCE_ERROR">XPTR_SUB_RESOURCE_ERROR</a> = 18
    <a name="XPATH_UNDEF_PREFIX_ERROR">XPATH_UNDEF_PREFIX_ERROR</a> = 19
    <a name="XPATH_ENCODING_ERROR">XPATH_ENCODING_ERROR</a> = 20
    <a name="XPATH_INVALID_CHAR_ERROR">XPATH_INVALID_CHAR_ERROR</a> = 21
    <a name="XPATH_INVALID_CTXT">XPATH_INVALID_CTXT</a> = 22
};
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        <div class="refsect2" lang="en"><h3><a name="xmlXPathFuncPtr">Typedef </a>xmlXPathFuncPtr</h3><pre class="programlisting"><a href="libxml2-xpath.html#xmlXPathFunct">xmlXPathFunct</a> * xmlXPathFuncPtr;
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        <div class="refsect2" lang="en"><h3><a name="xmlXPathFunct">Structure </a>xmlXPathFunct</h3><pre class="programlisting">struct _xmlXPathFunct {
    const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> *	name	: the function name
    <a href="libxml2-xpath.html#xmlXPathEvalFunc">xmlXPathEvalFunc</a>	func	: the evaluation function
} xmlXPathFunct;
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        <div class="refsect2" lang="en"><h3><a name="xmlXPathObject">Structure </a>xmlXPathObject</h3><pre class="programlisting">struct _xmlXPathObject {
    <a href="libxml2-xpath.html#xmlXPathObjectType">xmlXPathObjectType</a>	type
    <a href="libxml2-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a>	nodesetval
    int	boolval