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13 </style><title>Module xpath from libxml2</title></head><body bgcolor="#8b7765" text="#000000" link="#a06060" vlink="#000000"><table border="0" width="100%" cellpadding="5" cellspacing="0" align="center"><tr><td width="120"><a href="http://swpat.ffii.org/"><img src="../epatents.png" alt="Action against software patents" /></a></td><td width="180"><a href="http://www.gnome.org/"><img src="../gnome2.png" alt="Gnome2 Logo" /></a><a href="http://www.w3.org/Status"><img src="../w3c.png" alt="W3C Logo" /></a><a href="http://www.redhat.com/"><img src="../redhat.gif" alt="Red Hat Logo" /></a><div align="left"><a href="http://xmlsoft.org/"><img src="../Libxml2-Logo-180x168.gif" alt="Made with Libxml2 Logo" /></a></div></td><td><table border="0" width="90%" cellpadding="2" cellspacing="0" align="center" bgcolor="#000000"><tr><td><table width="100%" border="0" cellspacing="1" cellpadding="3" bgcolor="#fffacd"><tr><td align="center"><h1></h1><h2>Module xpath from 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href="index.html">API documentation</a></th><td><a accesskey="h" href="../index.html"><img src="home.png" width="24" height="24" border="0" alt="Home" /></a></td><th align="center"><a href="../index.html">The XML C parser and toolkit of Gnome</a></th><th align="right"><a href="libxml-xpathInternals.html">xpathInternals</a></th><td><a accesskey="n" href="libxml-xpathInternals.html"><img src="right.png" width="24" height="24" border="0" alt="Next" /></a></td></tr></table><p>API for the XML Path Language implementation XML Path Language implementation XPath is a language for addressing parts of an XML document, designed to be used by both XSLT and XPointer</p><h2>Table of Contents</h2><pre class="programlisting">#define <a href="#XML_XPATH_CHECKNS">XML_XPATH_CHECKNS</a></pre><pre class="programlisting">#define <a href="#XML_XPATH_NOVAR">XML_XPATH_NOVAR</a></pre><pre class="programlisting">#define <a href="#xmlXPathNodeSetGetLength">xmlXPathNodeSetGetLength</a></pre><pre class="programlisting">#define <a href="#xmlXPathNodeSetIsEmpty">xmlXPathNodeSetIsEmpty</a></pre><pre class="programlisting">#define <a href="#xmlXPathNodeSetItem">xmlXPathNodeSetItem</a></pre><pre class="programlisting">Structure <a href="#xmlNodeSet">xmlNodeSet</a><br />struct _xmlNodeSet
14 </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlNodeSet">xmlNodeSet</a> * <a name="xmlNodeSetPtr" id="xmlNodeSetPtr">xmlNodeSetPtr</a>
15 </pre><pre class="programlisting">Structure <a href="#xmlXPathAxis">xmlXPathAxis</a><br />struct _xmlXPathAxis
16 </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlXPathAxis">xmlXPathAxis</a> * <a name="xmlXPathAxisPtr" id="xmlXPathAxisPtr">xmlXPathAxisPtr</a>
17 </pre><pre class="programlisting">Structure <a href="#xmlXPathCompExpr">xmlXPathCompExpr</a><br />struct _xmlXPathCompExpr
18 The content of this structure is not made public by the API.
19 </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlXPathCompExpr">xmlXPathCompExpr</a> * <a name="xmlXPathCompExprPtr" id="xmlXPathCompExprPtr">xmlXPathCompExprPtr</a>
20 </pre><pre class="programlisting">Structure <a href="#xmlXPathContext">xmlXPathContext</a><br />struct _xmlXPathContext
21 </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlXPathContext">xmlXPathContext</a> * <a name="xmlXPathContextPtr" id="xmlXPathContextPtr">xmlXPathContextPtr</a>
22 </pre><pre class="programlisting">Enum <a href="#xmlXPathError">xmlXPathError</a>
23 </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlXPathFunct">xmlXPathFunct</a> * <a name="xmlXPathFuncPtr" id="xmlXPathFuncPtr">xmlXPathFuncPtr</a>
24 </pre><pre class="programlisting">Structure <a href="#xmlXPathFunct">xmlXPathFunct</a><br />struct _xmlXPathFunct
25 </pre><pre class="programlisting">Structure <a href="#xmlXPathObject">xmlXPathObject</a><br />struct _xmlXPathObject
26 </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlXPathObject">xmlXPathObject</a> * <a name="xmlXPathObjectPtr" id="xmlXPathObjectPtr">xmlXPathObjectPtr</a>
27 </pre><pre class="programlisting">Enum <a href="#xmlXPathObjectType">xmlXPathObjectType</a>
28 </pre><pre class="programlisting">Structure <a href="#xmlXPathParserContext">xmlXPathParserContext</a><br />struct _xmlXPathParserContext
29 </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlXPathParserContext">xmlXPathParserContext</a> * <a name="xmlXPathParserContextPtr" id="xmlXPathParserContextPtr">xmlXPathParserContextPtr</a>
30 </pre><pre class="programlisting">Structure <a href="#xmlXPathType">xmlXPathType</a><br />struct _xmlXPathType
31 </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlXPathType">xmlXPathType</a> * <a name="xmlXPathTypePtr" id="xmlXPathTypePtr">xmlXPathTypePtr</a>
32 </pre><pre class="programlisting">Structure <a href="#xmlXPathVariable">xmlXPathVariable</a><br />struct _xmlXPathVariable
33 </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlXPathVariable">xmlXPathVariable</a> * <a name="xmlXPathVariablePtr" id="xmlXPathVariablePtr">xmlXPathVariablePtr</a>
34 </pre><pre class="programlisting">Function type: <a href="#xmlXPathAxisFunc">xmlXPathAxisFunc</a>
35 <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> <a href="#xmlXPathAxisFunc">xmlXPathAxisFunc</a> (<a href="libxml-xpath.html#xmlXPathParserContextPtr">xmlXPathParserContextPtr</a> ctxt, <br /> <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> cur)
37 <pre class="programlisting">double <a href="#xmlXPathCastBooleanToNumber">xmlXPathCastBooleanToNumber</a> (int val)</pre>
38 <pre class="programlisting"><a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * <a href="#xmlXPathCastBooleanToString">xmlXPathCastBooleanToString</a> (int val)</pre>
39 <pre class="programlisting">int <a href="#xmlXPathCastNodeSetToBoolean">xmlXPathCastNodeSetToBoolean</a> (<a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> ns)</pre>
40 <pre class="programlisting">double <a href="#xmlXPathCastNodeSetToNumber">xmlXPathCastNodeSetToNumber</a> (<a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> ns)</pre>
41 <pre class="programlisting"><a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * <a href="#xmlXPathCastNodeSetToString">xmlXPathCastNodeSetToString</a> (<a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> ns)</pre>
42 <pre class="programlisting">double <a href="#xmlXPathCastNodeToNumber">xmlXPathCastNodeToNumber</a> (<a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> node)</pre>
43 <pre class="programlisting"><a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * <a href="#xmlXPathCastNodeToString">xmlXPathCastNodeToString</a> (<a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> node)</pre>
44 <pre class="programlisting">int <a href="#xmlXPathCastNumberToBoolean">xmlXPathCastNumberToBoolean</a> (double val)</pre>
45 <pre class="programlisting"><a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * <a href="#xmlXPathCastNumberToString">xmlXPathCastNumberToString</a> (double val)</pre>
46 <pre class="programlisting">int <a href="#xmlXPathCastStringToBoolean">xmlXPathCastStringToBoolean</a> (const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * val)</pre>
47 <pre class="programlisting">double <a href="#xmlXPathCastStringToNumber">xmlXPathCastStringToNumber</a> (const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * val)</pre>
48 <pre class="programlisting">int <a href="#xmlXPathCastToBoolean">xmlXPathCastToBoolean</a> (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> val)</pre>
49 <pre class="programlisting">double <a href="#xmlXPathCastToNumber">xmlXPathCastToNumber</a> (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> val)</pre>
50 <pre class="programlisting"><a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * <a href="#xmlXPathCastToString">xmlXPathCastToString</a> (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> val)</pre>
51 <pre class="programlisting">int <a href="#xmlXPathCmpNodes">xmlXPathCmpNodes</a> (<a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> node1, <br /> <a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> node2)</pre>
52 <pre class="programlisting"><a href="libxml-xpath.html#xmlXPathCompExprPtr">xmlXPathCompExprPtr</a> <a href="#xmlXPathCompile">xmlXPathCompile</a> (const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * str)</pre>
53 <pre class="programlisting"><a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> <a href="#xmlXPathCompiledEval">xmlXPathCompiledEval</a> (<a href="libxml-xpath.html#xmlXPathCompExprPtr">xmlXPathCompExprPtr</a> comp, <br /> <a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctx)</pre>
54 <pre class="programlisting">int <a href="#xmlXPathCompiledEvalToBoolean">xmlXPathCompiledEvalToBoolean</a> (<a href="libxml-xpath.html#xmlXPathCompExprPtr">xmlXPathCompExprPtr</a> comp, <br /> <a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctxt)</pre>
55 <pre class="programlisting">int <a href="#xmlXPathContextSetCache">xmlXPathContextSetCache</a> (<a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctxt, <br /> int active, <br /> int value, <br /> int options)</pre>
56 <pre class="programlisting"><a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> <a href="#xmlXPathConvertBoolean">xmlXPathConvertBoolean</a> (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> val)</pre>
57 <pre class="programlisting">Function type: <a href="#xmlXPathConvertFunc">xmlXPathConvertFunc</a>
58 int <a href="#xmlXPathConvertFunc">xmlXPathConvertFunc</a> (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> obj, <br /> int type)
60 <pre class="programlisting"><a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> <a href="#xmlXPathConvertNumber">xmlXPathConvertNumber</a> (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> val)</pre>
61 <pre class="programlisting"><a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> <a href="#xmlXPathConvertString">xmlXPathConvertString</a> (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> val)</pre>
62 <pre class="programlisting"><a href="libxml-xpath.html#xmlXPathCompExprPtr">xmlXPathCompExprPtr</a> <a href="#xmlXPathCtxtCompile">xmlXPathCtxtCompile</a> (<a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctxt, <br /> const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * str)</pre>
63 <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>
64 <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>
65 <pre class="programlisting">Function type: <a href="#xmlXPathEvalFunc">xmlXPathEvalFunc</a>
66 void <a href="#xmlXPathEvalFunc">xmlXPathEvalFunc</a> (<a href="libxml-xpath.html#xmlXPathParserContextPtr">xmlXPathParserContextPtr</a> ctxt, <br /> int nargs)
68 <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>
69 <pre class="programlisting">void <a href="#xmlXPathFreeCompExpr">xmlXPathFreeCompExpr</a> (<a href="libxml-xpath.html#xmlXPathCompExprPtr">xmlXPathCompExprPtr</a> comp)</pre>
70 <pre class="programlisting">void <a href="#xmlXPathFreeContext">xmlXPathFreeContext</a> (<a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctxt)</pre>
71 <pre class="programlisting">void <a href="#xmlXPathFreeNodeSet">xmlXPathFreeNodeSet</a> (<a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> obj)</pre>
72 <pre class="programlisting">void <a href="#xmlXPathFreeNodeSetList">xmlXPathFreeNodeSetList</a> (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> obj)</pre>
73 <pre class="programlisting">void <a href="#xmlXPathFreeObject">xmlXPathFreeObject</a> (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> obj)</pre>
74 <pre class="programlisting">Function type: <a href="#xmlXPathFuncLookupFunc">xmlXPathFuncLookupFunc</a>
75 <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)
77 <pre class="programlisting">Function type: <a href="#xmlXPathFunction">xmlXPathFunction</a>
78 void <a href="#xmlXPathFunction">xmlXPathFunction</a> (<a href="libxml-xpath.html#xmlXPathParserContextPtr">xmlXPathParserContextPtr</a> ctxt, <br /> int nargs)
80 <pre class="programlisting">void <a href="#xmlXPathInit">xmlXPathInit</a> (void)</pre>
81 <pre class="programlisting">int <a href="#xmlXPathIsInf">xmlXPathIsInf</a> (double val)</pre>
82 <pre class="programlisting">int <a href="#xmlXPathIsNaN">xmlXPathIsNaN</a> (double val)</pre>
83 <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>
84 <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>
85 <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>
86 <pre class="programlisting">long <a href="#xmlXPathOrderDocElems">xmlXPathOrderDocElems</a> (<a href="libxml-tree.html#xmlDocPtr">xmlDocPtr</a> doc)</pre>
87 <pre class="programlisting">Function type: <a href="#xmlXPathVariableLookupFunc">xmlXPathVariableLookupFunc</a>
88 <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)
91 <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>
92 <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>
93 <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>
94 <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>
95 <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>
96 <h3><a name="xmlNodeSet" id="xmlNodeSet">Structure xmlNodeSet</a></h3><pre class="programlisting">Structure xmlNodeSet<br />struct _xmlNodeSet {
97 int nodeNr : number of nodes in the set
98 int nodeMax : size of the array as allocated
99 <a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> * nodeTab : array of nodes in no particular order @
100 }</pre><h3><a name="xmlXPathAxis" id="xmlXPathAxis">Structure xmlXPathAxis</a></h3><pre class="programlisting">Structure xmlXPathAxis<br />struct _xmlXPathAxis {
101 const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * name : the axis name
102 <a href="libxml-xpath.html#xmlXPathAxisFunc">xmlXPathAxisFunc</a> func : the search function
103 }</pre><h3><a name="xmlXPathCompExpr" id="xmlXPathCompExpr">Structure xmlXPathCompExpr</a></h3><pre class="programlisting">Structure xmlXPathCompExpr<br />struct _xmlXPathCompExpr {
104 The content of this structure is not made public by the API.
105 }</pre><h3><a name="xmlXPathContext" id="xmlXPathContext">Structure xmlXPathContext</a></h3><pre class="programlisting">Structure xmlXPathContext<br />struct _xmlXPathContext {
106 <a href="libxml-tree.html#xmlDocPtr">xmlDocPtr</a> doc : The current document
107 <a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> node : The current node
108 int nb_variables_unused : unused (hash table)
109 int max_variables_unused : unused (hash table)
110 <a href="libxml-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> varHash : Hash table of defined variables
111 int nb_types : number of defined types
112 int max_types : max number of types
113 <a href="libxml-xpath.html#xmlXPathTypePtr">xmlXPathTypePtr</a> types : Array of defined types
114 int nb_funcs_unused : unused (hash table)
115 int max_funcs_unused : unused (hash table)
116 <a href="libxml-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> funcHash : Hash table of defined funcs
117 int nb_axis : number of defined axis
118 int max_axis : max number of axis
119 <a href="libxml-xpath.html#xmlXPathAxisPtr">xmlXPathAxisPtr</a> axis : Array of defined axis the namespace nod
120 <a href="libxml-tree.html#xmlNsPtr">xmlNsPtr</a> * namespaces : Array of namespaces
121 int nsNr : number of namespace in scope
122 void * user : function to free extra variables
123 int contextSize : the context size
124 int proximityPosition : the proximity position extra stuff for
125 int xptr : is this an XPointer context?
126 <a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> here : for here()
127 <a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> origin : for origin() the set of namespace decla
128 <a href="libxml-hash.html#xmlHashTablePtr">xmlHashTablePtr</a> nsHash : The namespaces hash table
129 <a href="libxml-xpath.html#xmlXPathVariableLookupFunc">xmlXPathVariableLookupFunc</a> varLookupFunc : variable lookup func
130 void * varLookupData : variable lookup data Possibility to lin
131 void * extra : needed for XSLT The function name and U
132 const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * function
133 const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * functionURI : function lookup function and data
134 <a href="libxml-xpath.html#xmlXPathFuncLookupFunc">xmlXPathFuncLookupFunc</a> funcLookupFunc : function lookup func
135 void * funcLookupData : function lookup data temporary namespac
136 <a href="libxml-tree.html#xmlNsPtr">xmlNsPtr</a> * tmpNsList : Array of namespaces
137 int tmpNsNr : number of namespaces in scope error rep
138 void * userData : user specific data block
139 <a href="libxml-xmlerror.html#xmlStructuredErrorFunc">xmlStructuredErrorFunc</a> error : the callback in case of errors
140 <a href="libxml-xmlerror.html#xmlError">xmlError</a> lastError : the last error
141 <a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> debugNode : the source node XSLT dictionary
142 <a href="libxml-dict.html#xmlDictPtr">xmlDictPtr</a> dict : dictionary if any
143 int flags : flags to control compilation Cache for
145 }</pre><h3>Enum <a name="xmlXPathError" id="xmlXPathError">xmlXPathError</a></h3><pre class="programlisting">Enum xmlXPathError {
146 <a name="XPATH_EXPRESSION_OK" id="XPATH_EXPRESSION_OK">XPATH_EXPRESSION_OK</a> = 0
147 <a name="XPATH_NUMBER_ERROR" id="XPATH_NUMBER_ERROR">XPATH_NUMBER_ERROR</a> = 1
148 <a name="XPATH_UNFINISHED_LITERAL_ERROR" id="XPATH_UNFINISHED_LITERAL_ERROR">XPATH_UNFINISHED_LITERAL_ERROR</a> = 2
149 <a name="XPATH_START_LITERAL_ERROR" id="XPATH_START_LITERAL_ERROR">XPATH_START_LITERAL_ERROR</a> = 3
150 <a name="XPATH_VARIABLE_REF_ERROR" id="XPATH_VARIABLE_REF_ERROR">XPATH_VARIABLE_REF_ERROR</a> = 4
151 <a name="XPATH_UNDEF_VARIABLE_ERROR" id="XPATH_UNDEF_VARIABLE_ERROR">XPATH_UNDEF_VARIABLE_ERROR</a> = 5
152 <a name="XPATH_INVALID_PREDICATE_ERROR" id="XPATH_INVALID_PREDICATE_ERROR">XPATH_INVALID_PREDICATE_ERROR</a> = 6
153 <a name="XPATH_EXPR_ERROR" id="XPATH_EXPR_ERROR">XPATH_EXPR_ERROR</a> = 7
154 <a name="XPATH_UNCLOSED_ERROR" id="XPATH_UNCLOSED_ERROR">XPATH_UNCLOSED_ERROR</a> = 8
155 <a name="XPATH_UNKNOWN_FUNC_ERROR" id="XPATH_UNKNOWN_FUNC_ERROR">XPATH_UNKNOWN_FUNC_ERROR</a> = 9
156 <a name="XPATH_INVALID_OPERAND" id="XPATH_INVALID_OPERAND">XPATH_INVALID_OPERAND</a> = 10
157 <a name="XPATH_INVALID_TYPE" id="XPATH_INVALID_TYPE">XPATH_INVALID_TYPE</a> = 11
158 <a name="XPATH_INVALID_ARITY" id="XPATH_INVALID_ARITY">XPATH_INVALID_ARITY</a> = 12
159 <a name="XPATH_INVALID_CTXT_SIZE" id="XPATH_INVALID_CTXT_SIZE">XPATH_INVALID_CTXT_SIZE</a> = 13
160 <a name="XPATH_INVALID_CTXT_POSITION" id="XPATH_INVALID_CTXT_POSITION">XPATH_INVALID_CTXT_POSITION</a> = 14
161 <a name="XPATH_MEMORY_ERROR" id="XPATH_MEMORY_ERROR">XPATH_MEMORY_ERROR</a> = 15
162 <a name="XPTR_SYNTAX_ERROR" id="XPTR_SYNTAX_ERROR">XPTR_SYNTAX_ERROR</a> = 16
163 <a name="XPTR_RESOURCE_ERROR" id="XPTR_RESOURCE_ERROR">XPTR_RESOURCE_ERROR</a> = 17
164 <a name="XPTR_SUB_RESOURCE_ERROR" id="XPTR_SUB_RESOURCE_ERROR">XPTR_SUB_RESOURCE_ERROR</a> = 18
165 <a name="XPATH_UNDEF_PREFIX_ERROR" id="XPATH_UNDEF_PREFIX_ERROR">XPATH_UNDEF_PREFIX_ERROR</a> = 19
166 <a name="XPATH_ENCODING_ERROR" id="XPATH_ENCODING_ERROR">XPATH_ENCODING_ERROR</a> = 20
167 <a name="XPATH_INVALID_CHAR_ERROR" id="XPATH_INVALID_CHAR_ERROR">XPATH_INVALID_CHAR_ERROR</a> = 21
168 <a name="XPATH_INVALID_CTXT" id="XPATH_INVALID_CTXT">XPATH_INVALID_CTXT</a> = 22
170 </pre><h3><a name="xmlXPathFunct" id="xmlXPathFunct">Structure xmlXPathFunct</a></h3><pre class="programlisting">Structure xmlXPathFunct<br />struct _xmlXPathFunct {
171 const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * name : the function name
172 <a href="libxml-xpath.html#xmlXPathEvalFunc">xmlXPathEvalFunc</a> func : the evaluation function
173 }</pre><h3><a name="xmlXPathObject" id="xmlXPathObject">Structure xmlXPathObject</a></h3><pre class="programlisting">Structure xmlXPathObject<br />struct _xmlXPathObject {
174 <a href="libxml-xpath.html#xmlXPathObjectType">xmlXPathObjectType</a> type
175 <a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> nodesetval
178 <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * stringval
183 }</pre><h3>Enum <a name="xmlXPathObjectType" id="xmlXPathObjectType">xmlXPathObjectType</a></h3><pre class="programlisting">Enum xmlXPathObjectType {
184 <a name="XPATH_UNDEFINED" id="XPATH_UNDEFINED">XPATH_UNDEFINED</a> = 0
185 <a name="XPATH_NODESET" id="XPATH_NODESET">XPATH_NODESET</a> = 1
186 <a name="XPATH_BOOLEAN" id="XPATH_BOOLEAN">XPATH_BOOLEAN</a> = 2
187 <a name="XPATH_NUMBER" id="XPATH_NUMBER">XPATH_NUMBER</a> = 3
188 <a name="XPATH_STRING" id="XPATH_STRING">XPATH_STRING</a> = 4
189 <a name="XPATH_POINT" id="XPATH_POINT">XPATH_POINT</a> = 5
190 <a name="XPATH_RANGE" id="XPATH_RANGE">XPATH_RANGE</a> = 6
191 <a name="XPATH_LOCATIONSET" id="XPATH_LOCATIONSET">XPATH_LOCATIONSET</a> = 7
192 <a name="XPATH_USERS" id="XPATH_USERS">XPATH_USERS</a> = 8
193 <a name="XPATH_XSLT_TREE" id="XPATH_XSLT_TREE">XPATH_XSLT_TREE</a> = 9 : An XSLT value tree, non modifiable
195 </pre><h3><a name="xmlXPathParserContext" id="xmlXPathParserContext">Structure xmlXPathParserContext</a></h3><pre class="programlisting">Structure xmlXPathParserContext<br />struct _xmlXPathParserContext {
196 const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * cur : the current char being parsed
197 const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * base : the full expression
198 int error : error code
199 <a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> context : the evaluation context
200 <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> value : the current value
201 int valueNr : number of values stacked
202 int valueMax : max number of values stacked
203 <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> * valueTab : stack of values
204 <a href="libxml-xpath.html#xmlXPathCompExprPtr">xmlXPathCompExprPtr</a> comp : the precompiled expression
205 int xptr : it this an XPointer expression
206 <a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> ancestor : used for walking preceding axis
207 }</pre><h3><a name="xmlXPathType" id="xmlXPathType">Structure xmlXPathType</a></h3><pre class="programlisting">Structure xmlXPathType<br />struct _xmlXPathType {
208 const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * name : the type name
209 <a href="libxml-xpath.html#xmlXPathConvertFunc">xmlXPathConvertFunc</a> func : the conversion function
210 }</pre><h3><a name="xmlXPathVariable" id="xmlXPathVariable">Structure xmlXPathVariable</a></h3><pre class="programlisting">Structure xmlXPathVariable<br />struct _xmlXPathVariable {
211 const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * name : the variable name
212 <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> value : the value
213 }</pre><h3><a name="xmlXPathAxisFunc" id="xmlXPathAxisFunc"></a>Function type: xmlXPathAxisFunc</h3><pre class="programlisting">Function type: xmlXPathAxisFunc
214 <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> xmlXPathAxisFunc (<a href="libxml-xpath.html#xmlXPathParserContextPtr">xmlXPathParserContextPtr</a> ctxt, <br /> <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> cur)
215 </pre><p>An axis traversal function. To traverse an axis, the engine calls the first time with cur == NULL and repeat until the function returns NULL indicating the end of the axis traversal.</p><div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>the XPath interpreter context</td></tr><tr><td><span class="term"><i><tt>cur</tt></i>:</span></td><td>the previous node being explored on that axis</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the next node in that axis or NULL if at the end of the axis.</td></tr></tbody></table></div><br />
216 <h3><a name="xmlXPathCastBooleanToNumber" id="xmlXPathCastBooleanToNumber"></a>Function: xmlXPathCastBooleanToNumber</h3><pre class="programlisting">double xmlXPathCastBooleanToNumber (int val)<br />
217 </pre><p>Converts a boolean to its number value</p>
218 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>a boolean</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the number value</td></tr></tbody></table></div><h3><a name="xmlXPathCastBooleanToString" id="xmlXPathCastBooleanToString"></a>Function: xmlXPathCastBooleanToString</h3><pre class="programlisting"><a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * xmlXPathCastBooleanToString (int val)<br />
219 </pre><p>Converts a boolean to its string value.</p>
220 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>a boolean</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a newly allocated string.</td></tr></tbody></table></div><h3><a name="xmlXPathCastNodeSetToBoolean" id="xmlXPathCastNodeSetToBoolean"></a>Function: xmlXPathCastNodeSetToBoolean</h3><pre class="programlisting">int xmlXPathCastNodeSetToBoolean (<a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> ns)<br />
221 </pre><p>Converts a node-set to its boolean value</p>
222 <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>Returns</tt></i>:</span></td><td>the boolean value</td></tr></tbody></table></div><h3><a name="xmlXPathCastNodeSetToNumber" id="xmlXPathCastNodeSetToNumber"></a>Function: xmlXPathCastNodeSetToNumber</h3><pre class="programlisting">double xmlXPathCastNodeSetToNumber (<a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> ns)<br />
223 </pre><p>Converts a node-set to its number value</p>
224 <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>Returns</tt></i>:</span></td><td>the number value</td></tr></tbody></table></div><h3><a name="xmlXPathCastNodeSetToString" id="xmlXPathCastNodeSetToString"></a>Function: xmlXPathCastNodeSetToString</h3><pre class="programlisting"><a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * xmlXPathCastNodeSetToString (<a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> ns)<br />
225 </pre><p>Converts a node-set to its string value.</p>
226 <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>Returns</tt></i>:</span></td><td>a newly allocated string.</td></tr></tbody></table></div><h3><a name="xmlXPathCastNodeToNumber" id="xmlXPathCastNodeToNumber"></a>Function: xmlXPathCastNodeToNumber</h3><pre class="programlisting">double xmlXPathCastNodeToNumber (<a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> node)<br />
227 </pre><p>Converts a node to its number value</p>
228 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>node</tt></i>:</span></td><td>a node</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the number value</td></tr></tbody></table></div><h3><a name="xmlXPathCastNodeToString" id="xmlXPathCastNodeToString"></a>Function: xmlXPathCastNodeToString</h3><pre class="programlisting"><a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * xmlXPathCastNodeToString (<a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> node)<br />
229 </pre><p>Converts a node to its string value.</p>
230 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>node</tt></i>:</span></td><td>a node</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a newly allocated string.</td></tr></tbody></table></div><h3><a name="xmlXPathCastNumberToBoolean" id="xmlXPathCastNumberToBoolean"></a>Function: xmlXPathCastNumberToBoolean</h3><pre class="programlisting">int xmlXPathCastNumberToBoolean (double val)<br />
231 </pre><p>Converts a number to its boolean value</p>
232 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>a number</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the boolean value</td></tr></tbody></table></div><h3><a name="xmlXPathCastNumberToString" id="xmlXPathCastNumberToString"></a>Function: xmlXPathCastNumberToString</h3><pre class="programlisting"><a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * xmlXPathCastNumberToString (double val)<br />
233 </pre><p>Converts a number to its string value.</p>
234 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>a number</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a newly allocated string.</td></tr></tbody></table></div><h3><a name="xmlXPathCastStringToBoolean" id="xmlXPathCastStringToBoolean"></a>Function: xmlXPathCastStringToBoolean</h3><pre class="programlisting">int xmlXPathCastStringToBoolean (const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * val)<br />
235 </pre><p>Converts a string to its boolean value</p>
236 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>a string</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the boolean value</td></tr></tbody></table></div><h3><a name="xmlXPathCastStringToNumber" id="xmlXPathCastStringToNumber"></a>Function: xmlXPathCastStringToNumber</h3><pre class="programlisting">double xmlXPathCastStringToNumber (const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * val)<br />
237 </pre><p>Converts a string to its number value</p>
238 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>a string</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the number value</td></tr></tbody></table></div><h3><a name="xmlXPathCastToBoolean" id="xmlXPathCastToBoolean"></a>Function: xmlXPathCastToBoolean</h3><pre class="programlisting">int xmlXPathCastToBoolean (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> val)<br />
239 </pre><p>Converts an XPath object to its boolean value</p>
240 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>an XPath object</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the boolean value</td></tr></tbody></table></div><h3><a name="xmlXPathCastToNumber" id="xmlXPathCastToNumber"></a>Function: xmlXPathCastToNumber</h3><pre class="programlisting">double xmlXPathCastToNumber (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> val)<br />
241 </pre><p>Converts an XPath object to its number value</p>
242 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>an XPath object</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the number value</td></tr></tbody></table></div><h3><a name="xmlXPathCastToString" id="xmlXPathCastToString"></a>Function: xmlXPathCastToString</h3><pre class="programlisting"><a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * xmlXPathCastToString (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> val)<br />
243 </pre><p>Converts an existing object to its string() equivalent</p>
244 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>an XPath object</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the allocated string value of the object, NULL in case of error. It's up to the caller to free the string memory with xmlFree().</td></tr></tbody></table></div><h3><a name="xmlXPathCmpNodes" id="xmlXPathCmpNodes"></a>Function: xmlXPathCmpNodes</h3><pre class="programlisting">int xmlXPathCmpNodes (<a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> node1, <br /> <a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> node2)<br />
245 </pre><p>Compare two nodes w.r.t document order</p>
246 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>node1</tt></i>:</span></td><td>the first node</td></tr><tr><td><span class="term"><i><tt>node2</tt></i>:</span></td><td>the second node</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>-2 in case of error 1 if first point < second point, 0 if it's the same node, -1 otherwise</td></tr></tbody></table></div><h3><a name="xmlXPathCompile" id="xmlXPathCompile"></a>Function: xmlXPathCompile</h3><pre class="programlisting"><a href="libxml-xpath.html#xmlXPathCompExprPtr">xmlXPathCompExprPtr</a> xmlXPathCompile (const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * str)<br />
247 </pre><p>Compile an XPath expression</p>
248 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>str</tt></i>:</span></td><td>the XPath expression</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the <a href="libxml-xpath.html#xmlXPathCompExprPtr">xmlXPathCompExprPtr</a> resulting from the compilation or NULL. the caller has to free the object.</td></tr></tbody></table></div><h3><a name="xmlXPathCompiledEval" id="xmlXPathCompiledEval"></a>Function: xmlXPathCompiledEval</h3><pre class="programlisting"><a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> xmlXPathCompiledEval (<a href="libxml-xpath.html#xmlXPathCompExprPtr">xmlXPathCompExprPtr</a> comp, <br /> <a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctx)<br />
249 </pre><p>Evaluate the Precompiled XPath expression in the given context.</p>
250 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>comp</tt></i>:</span></td><td>the compiled XPath expression</td></tr><tr><td><span class="term"><i><tt>ctx</tt></i>:</span></td><td>the XPath context</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> resulting from the evaluation or NULL. the caller has to free the object.</td></tr></tbody></table></div><h3><a name="xmlXPathCompiledEvalToBoolean" id="xmlXPathCompiledEvalToBoolean"></a>Function: xmlXPathCompiledEvalToBoolean</h3><pre class="programlisting">int xmlXPathCompiledEvalToBoolean (<a href="libxml-xpath.html#xmlXPathCompExprPtr">xmlXPathCompExprPtr</a> comp, <br /> <a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctxt)<br />
251 </pre><p>Applies the XPath boolean() function on the result of the given compiled expression.</p>
252 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>comp</tt></i>:</span></td><td>the compiled XPath expression</td></tr><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>the XPath context</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>1 if the expression evaluated to true, 0 if to false and -1 in API and internal errors.</td></tr></tbody></table></div><h3><a name="xmlXPathContextSetCache" id="xmlXPathContextSetCache"></a>Function: xmlXPathContextSetCache</h3><pre class="programlisting">int xmlXPathContextSetCache (<a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctxt, <br /> int active, <br /> int value, <br /> int options)<br />
253 </pre><p>Creates/frees an object cache on the XPath context. If activates XPath objects (xmlXPathObject) will be cached internally to be reused. @options: 0: This will set the XPath object caching: @value: This will set the maximum number of XPath objects to be cached per slot There are 5 slots for: node-set, string, number, boolean, and misc objects. Use <0 for the default number (100). Other values for @options have currently no effect.</p>
254 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>the XPath context</td></tr><tr><td><span class="term"><i><tt>active</tt></i>:</span></td><td>enables/disables (creates/frees) the cache</td></tr><tr><td><span class="term"><i><tt>value</tt></i>:</span></td><td>a value with semantics dependant on @options</td></tr><tr><td><span class="term"><i><tt>options</tt></i>:</span></td><td>options (currently only the value 0 is used)</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 if the setting succeeded, and -1 on API or internal errors.</td></tr></tbody></table></div><h3><a name="xmlXPathConvertBoolean" id="xmlXPathConvertBoolean"></a>Function: xmlXPathConvertBoolean</h3><pre class="programlisting"><a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> xmlXPathConvertBoolean (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> val)<br />
255 </pre><p>Converts an existing object to its boolean() equivalent</p>
256 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>an XPath object</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the new object, the old one is freed (or the operation is done directly on @val)</td></tr></tbody></table></div><h3><a name="xmlXPathConvertFunc" id="xmlXPathConvertFunc"></a>Function type: xmlXPathConvertFunc</h3><pre class="programlisting">Function type: xmlXPathConvertFunc
257 int xmlXPathConvertFunc (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> obj, <br /> int type)
258 </pre><p>A conversion function is associated to a type and used to cast the new type to primitive values.</p><div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>obj</tt></i>:</span></td><td>an XPath object</td></tr><tr><td><span class="term"><i><tt>type</tt></i>:</span></td><td>the number of the target type</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of error, 0 otherwise</td></tr></tbody></table></div><br />
259 <h3><a name="xmlXPathConvertNumber" id="xmlXPathConvertNumber"></a>Function: xmlXPathConvertNumber</h3><pre class="programlisting"><a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> xmlXPathConvertNumber (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> val)<br />
260 </pre><p>Converts an existing object to its number() equivalent</p>
261 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>an XPath object</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the new object, the old one is freed (or the operation is done directly on @val)</td></tr></tbody></table></div><h3><a name="xmlXPathConvertString" id="xmlXPathConvertString"></a>Function: xmlXPathConvertString</h3><pre class="programlisting"><a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> xmlXPathConvertString (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> val)<br />
262 </pre><p>Converts an existing object to its string() equivalent</p>
263 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>an XPath object</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the new object, the old one is freed (or the operation is done directly on @val)</td></tr></tbody></table></div><h3><a name="xmlXPathCtxtCompile" id="xmlXPathCtxtCompile"></a>Function: xmlXPathCtxtCompile</h3><pre class="programlisting"><a href="libxml-xpath.html#xmlXPathCompExprPtr">xmlXPathCompExprPtr</a> xmlXPathCtxtCompile (<a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctxt, <br /> const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * str)<br />
264 </pre><p>Compile an XPath expression</p>
265 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>an XPath context</td></tr><tr><td><span class="term"><i><tt>str</tt></i>:</span></td><td>the XPath expression</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the <a href="libxml-xpath.html#xmlXPathCompExprPtr">xmlXPathCompExprPtr</a> resulting from the compilation or NULL. the caller has to free the object.</td></tr></tbody></table></div><h3><a name="xmlXPathEval" id="xmlXPathEval"></a>Function: xmlXPathEval</h3><pre class="programlisting"><a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> xmlXPathEval (const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * str, <br /> <a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctx)<br />
266 </pre><p>Evaluate the XPath Location Path in the given context.</p>
267 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>str</tt></i>:</span></td><td>the XPath expression</td></tr><tr><td><span class="term"><i><tt>ctx</tt></i>:</span></td><td>the XPath context</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> resulting from the evaluation or NULL. the caller has to free the object.</td></tr></tbody></table></div><h3><a name="xmlXPathEvalExpression" id="xmlXPathEvalExpression"></a>Function: xmlXPathEvalExpression</h3><pre class="programlisting"><a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> xmlXPathEvalExpression (const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * str, <br /> <a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctxt)<br />
268 </pre><p>Evaluate the XPath expression in the given context.</p>
269 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>str</tt></i>:</span></td><td>the XPath expression</td></tr><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>the XPath context</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> resulting from the evaluation or NULL. the caller has to free the object.</td></tr></tbody></table></div><h3><a name="xmlXPathEvalFunc" id="xmlXPathEvalFunc"></a>Function type: xmlXPathEvalFunc</h3><pre class="programlisting">Function type: xmlXPathEvalFunc
270 void xmlXPathEvalFunc (<a href="libxml-xpath.html#xmlXPathParserContextPtr">xmlXPathParserContextPtr</a> ctxt, <br /> int nargs)
271 </pre><p>An XPath evaluation function, the parameters are on the XPath context stack.</p><div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>an XPath parser context</td></tr><tr><td><span class="term"><i><tt>nargs</tt></i>:</span></td><td>the number of arguments passed to the function</td></tr></tbody></table></div><br />
272 <h3><a name="xmlXPathEvalPredicate" id="xmlXPathEvalPredicate"></a>Function: xmlXPathEvalPredicate</h3><pre class="programlisting">int xmlXPathEvalPredicate (<a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctxt, <br /> <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> res)<br />
273 </pre><p>Evaluate a predicate result for the current node. A PredicateExpr is evaluated by evaluating the Expr and converting the result to a boolean. If the result is a number, the result will be converted to true if the number is equal to the position of the context node in the context node list (as returned by the position function) and will be converted to false otherwise; if the result is not a number, then the result will be converted as if by a call to the boolean function.</p>
274 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>the XPath context</td></tr><tr><td><span class="term"><i><tt>res</tt></i>:</span></td><td>the Predicate Expression evaluation result</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>1 if predicate is true, 0 otherwise</td></tr></tbody></table></div><h3><a name="xmlXPathFreeCompExpr" id="xmlXPathFreeCompExpr"></a>Function: xmlXPathFreeCompExpr</h3><pre class="programlisting">void xmlXPathFreeCompExpr (<a href="libxml-xpath.html#xmlXPathCompExprPtr">xmlXPathCompExprPtr</a> comp)<br />
275 </pre><p>Free up the memory allocated by @comp</p>
276 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>comp</tt></i>:</span></td><td>an XPATH comp</td></tr></tbody></table></div><h3><a name="xmlXPathFreeContext" id="xmlXPathFreeContext"></a>Function: xmlXPathFreeContext</h3><pre class="programlisting">void xmlXPathFreeContext (<a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctxt)<br />
277 </pre><p>Free up an <a href="libxml-xpath.html#xmlXPathContext">xmlXPathContext</a></p>
278 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>the context to free</td></tr></tbody></table></div><h3><a name="xmlXPathFreeNodeSet" id="xmlXPathFreeNodeSet"></a>Function: xmlXPathFreeNodeSet</h3><pre class="programlisting">void xmlXPathFreeNodeSet (<a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> obj)<br />
279 </pre><p>Free the NodeSet compound (not the actual nodes !).</p>
280 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>obj</tt></i>:</span></td><td>the <a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> to free</td></tr></tbody></table></div><h3><a name="xmlXPathFreeNodeSetList" id="xmlXPathFreeNodeSetList"></a>Function: xmlXPathFreeNodeSetList</h3><pre class="programlisting">void xmlXPathFreeNodeSetList (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> obj)<br />
281 </pre><p>Free up the <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> @obj but don't deallocate the objects in the list contrary to xmlXPathFreeObject().</p>
282 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>obj</tt></i>:</span></td><td>an existing NodeSetList object</td></tr></tbody></table></div><h3><a name="xmlXPathFreeObject" id="xmlXPathFreeObject"></a>Function: xmlXPathFreeObject</h3><pre class="programlisting">void xmlXPathFreeObject (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> obj)<br />
283 </pre><p>Free up an <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> object.</p>
284 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>obj</tt></i>:</span></td><td>the object to free</td></tr></tbody></table></div><h3><a name="xmlXPathFuncLookupFunc" id="xmlXPathFuncLookupFunc"></a>Function type: xmlXPathFuncLookupFunc</h3><pre class="programlisting">Function type: xmlXPathFuncLookupFunc
285 <a href="libxml-xpath.html#xmlXPathFunction">xmlXPathFunction</a> xmlXPathFuncLookupFunc (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)
286 </pre><p>Prototype for callbacks used to plug function lookup in the XPath engine.</p><div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>an XPath context</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>name of the function</td></tr><tr><td><span class="term"><i><tt>ns_uri</tt></i>:</span></td><td>the namespace name hosting this function</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the XPath function or NULL if not found.</td></tr></tbody></table></div><br />
287 <h3><a name="xmlXPathFunction" id="xmlXPathFunction"></a>Function type: xmlXPathFunction</h3><pre class="programlisting">Function type: xmlXPathFunction
288 void xmlXPathFunction (<a href="libxml-xpath.html#xmlXPathParserContextPtr">xmlXPathParserContextPtr</a> ctxt, <br /> int nargs)
289 </pre><p>An XPath function. The arguments (if any) are popped out from the context stack and the result is pushed on the stack.</p><div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>the XPath interprestation context</td></tr><tr><td><span class="term"><i><tt>nargs</tt></i>:</span></td><td>the number of arguments</td></tr></tbody></table></div><br />
290 <h3><a name="xmlXPathInit" id="xmlXPathInit"></a>Function: xmlXPathInit</h3><pre class="programlisting">void xmlXPathInit (void)<br />
291 </pre><p>Initialize the XPath environment</p>
292 <h3><a name="xmlXPathIsInf" id="xmlXPathIsInf"></a>Function: xmlXPathIsInf</h3><pre class="programlisting">int xmlXPathIsInf (double val)<br />
293 </pre><p>Provides a portable isinf() function to detect whether a double is a +Infinite or -Infinite. Based on trio code http://sourceforge.net/projects/ctrio/</p>
294 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>a double value</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>1 vi the value is +Infinite, -1 if -Infinite, 0 otherwise</td></tr></tbody></table></div><h3><a name="xmlXPathIsNaN" id="xmlXPathIsNaN"></a>Function: xmlXPathIsNaN</h3><pre class="programlisting">int xmlXPathIsNaN (double val)<br />
295 </pre><p>Provides a portable isnan() function to detect whether a double is a NotaNumber. Based on trio code http://sourceforge.net/projects/ctrio/</p>
296 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>a double value</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>1 if the value is a NaN, 0 otherwise</td></tr></tbody></table></div><h3><a name="xmlXPathNewContext" id="xmlXPathNewContext"></a>Function: xmlXPathNewContext</h3><pre class="programlisting"><a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> xmlXPathNewContext (<a href="libxml-tree.html#xmlDocPtr">xmlDocPtr</a> doc)<br />
297 </pre><p>Create a new <a href="libxml-xpath.html#xmlXPathContext">xmlXPathContext</a></p>
298 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>doc</tt></i>:</span></td><td>the XML document</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the <a href="libxml-xpath.html#xmlXPathContext">xmlXPathContext</a> just allocated. The caller will need to free it.</td></tr></tbody></table></div><h3><a name="xmlXPathNodeSetCreate" id="xmlXPathNodeSetCreate"></a>Function: xmlXPathNodeSetCreate</h3><pre class="programlisting"><a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> xmlXPathNodeSetCreate (<a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> val)<br />
299 </pre><p>Create a new <a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> of type double and of value @val</p>
300 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>an initial xmlNodePtr, or NULL</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the newly created object.</td></tr></tbody></table></div><h3><a name="xmlXPathObjectCopy" id="xmlXPathObjectCopy"></a>Function: xmlXPathObjectCopy</h3><pre class="programlisting"><a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> xmlXPathObjectCopy (<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> val)<br />
301 </pre><p>allocate a new copy of a given object</p>
302 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>val</tt></i>:</span></td><td>the original object</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the newly created object.</td></tr></tbody></table></div><h3><a name="xmlXPathOrderDocElems" id="xmlXPathOrderDocElems"></a>Function: xmlXPathOrderDocElems</h3><pre class="programlisting">long xmlXPathOrderDocElems (<a href="libxml-tree.html#xmlDocPtr">xmlDocPtr</a> doc)<br />
303 </pre><p>Call this routine to speed up XPath computation on static documents. This stamps all the element nodes with the document order Like for line information, the order is kept in the element->content field, the value stored is actually - the node number (starting at -1) to be able to differentiate from line numbers.</p>
304 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>doc</tt></i>:</span></td><td>an input document</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the number of elements found in the document or -1 in case of error.</td></tr></tbody></table></div><h3><a name="xmlXPathVariableLookupFunc" id="xmlXPathVariableLookupFunc"></a>Function type: xmlXPathVariableLookupFunc</h3><pre class="programlisting">Function type: xmlXPathVariableLookupFunc
305 <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> xmlXPathVariableLookupFunc (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)
306 </pre><p>Prototype for callbacks used to plug variable lookup in the XPath engine.</p><div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>an XPath context</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>name of the variable</td></tr><tr><td><span class="term"><i><tt>ns_uri</tt></i>:</span></td><td>the namespace name hosting this variable</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the XPath object value or NULL if not found.</td></tr></tbody></table></div><br />
307 <p><a href="../bugs.html">Daniel Veillard</a></p></td></tr></table></td></tr></table></td></tr></table></td></tr></table></td></tr></table></body></html>
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