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libxml-xpath.html

libxml-xpath.html 61 KB
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  1. <?xml version="1.0" encoding="ISO-8859-1"?>
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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 libxml2</h2></td></tr></table></td></tr></table></td></tr></table><table border="0" cellpadding="4" cellspacing="0" width="100%" align="center"><tr><td bgcolor="#8b7765"><table border="0" cellspacing="0" cellpadding="2" width="100%"><tr><td valign="top" width="200" bgcolor="#8b7765"><table border="0" cellspacing="0" cellpadding="1" width="100%" bgcolor="#000000"><tr><td><table width="100%" border="0" cellspacing="1" cellpadding="3"><tr><td colspan="1" bgcolor="#eecfa1" align="center"><center><b>API Menu</b></center></td></tr><tr><td bgcolor="#fffacd"><form action="../search.php" enctype="application/x-www-form-urlencoded" method="get"><input name="query" type="text" size="20" value="" /><input name="submit" type="submit" value="Search ..." /></form><ul><li><a style="font-weight:bold" href="../index.html">Main Menu</a></li><li><a style="font-weight:bold" href="../docs.html">Developer Menu</a></li><li><a style="font-weight:bold" href="../examples/index.html">Code Examples</a></li><li><a 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bgcolor="#fffacd"><ul><li><a href="http://mail.gnome.org/archives/xml/">Mail archive</a></li><li><a href="http://xmlsoft.org/XSLT/">XSLT libxslt</a></li><li><a href="http://phd.cs.unibo.it/gdome2/">DOM gdome2</a></li><li><a href="http://www.aleksey.com/xmlsec/">XML-DSig xmlsec</a></li><li><a href="ftp://xmlsoft.org/">FTP</a></li><li><a href="http://www.zlatkovic.com/projects/libxml/">Windows binaries</a></li><li><a href="http://opencsw.org/packages/libxml2">Solaris binaries</a></li><li><a href="http://www.explain.com.au/oss/libxml2xslt.html">MacOsX binaries</a></li><li><a href="http://codespeak.net/lxml/">lxml Python bindings</a></li><li><a href="http://cpan.uwinnipeg.ca/dist/XML-LibXML">Perl bindings</a></li><li><a href="http://libxmlplusplus.sourceforge.net/">C++ bindings</a></li><li><a href="http://www.zend.com/php5/articles/php5-xmlphp.php#Heading4">PHP bindings</a></li><li><a href="http://sourceforge.net/projects/libxml2-pas/">Pascal bindings</a></li><li><a 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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. 

  14. </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlNodeSet">xmlNodeSet</a> * <a name="xmlNodeSetPtr" id="xmlNodeSetPtr">xmlNodeSetPtr</a>
    15. 

  15. </pre><pre class="programlisting">Structure <a href="#xmlXPathAxis">xmlXPathAxis</a><br />struct _xmlXPathAxis
    16. 

  16. </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlXPathAxis">xmlXPathAxis</a> * <a name="xmlXPathAxisPtr" id="xmlXPathAxisPtr">xmlXPathAxisPtr</a>
    17. 

  17. </pre><pre class="programlisting">Structure <a href="#xmlXPathCompExpr">xmlXPathCompExpr</a><br />struct _xmlXPathCompExpr
    18. 

  18. The content of this structure is not made public by the API.
    19. 

  19. </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlXPathCompExpr">xmlXPathCompExpr</a> * <a name="xmlXPathCompExprPtr" id="xmlXPathCompExprPtr">xmlXPathCompExprPtr</a>
    20. 

  20. </pre><pre class="programlisting">Structure <a href="#xmlXPathContext">xmlXPathContext</a><br />struct _xmlXPathContext
    21. 

  21. </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlXPathContext">xmlXPathContext</a> * <a name="xmlXPathContextPtr" id="xmlXPathContextPtr">xmlXPathContextPtr</a>
    22. 

  22. </pre><pre class="programlisting">Enum <a href="#xmlXPathError">xmlXPathError</a>
    23. 

  23. </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlXPathFunct">xmlXPathFunct</a> * <a name="xmlXPathFuncPtr" id="xmlXPathFuncPtr">xmlXPathFuncPtr</a>
    24. 

  24. </pre><pre class="programlisting">Structure <a href="#xmlXPathFunct">xmlXPathFunct</a><br />struct _xmlXPathFunct
    25. 

  25. </pre><pre class="programlisting">Structure <a href="#xmlXPathObject">xmlXPathObject</a><br />struct _xmlXPathObject
    26. 

  26. </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlXPathObject">xmlXPathObject</a> * <a name="xmlXPathObjectPtr" id="xmlXPathObjectPtr">xmlXPathObjectPtr</a>
    27. 

  27. </pre><pre class="programlisting">Enum <a href="#xmlXPathObjectType">xmlXPathObjectType</a>
    28. 

  28. </pre><pre class="programlisting">Structure <a href="#xmlXPathParserContext">xmlXPathParserContext</a><br />struct _xmlXPathParserContext
    29. 

  29. </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlXPathParserContext">xmlXPathParserContext</a> * <a name="xmlXPathParserContextPtr" id="xmlXPathParserContextPtr">xmlXPathParserContextPtr</a>
    30. 

  30. </pre><pre class="programlisting">Structure <a href="#xmlXPathType">xmlXPathType</a><br />struct _xmlXPathType
    31. 

  31. </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlXPathType">xmlXPathType</a> * <a name="xmlXPathTypePtr" id="xmlXPathTypePtr">xmlXPathTypePtr</a>
    32. 

  32. </pre><pre class="programlisting">Structure <a href="#xmlXPathVariable">xmlXPathVariable</a><br />struct _xmlXPathVariable
    33. 

  33. </pre><pre class="programlisting">Typedef <a href="libxml-xpath.html#xmlXPathVariable">xmlXPathVariable</a> * <a name="xmlXPathVariablePtr" id="xmlXPathVariablePtr">xmlXPathVariablePtr</a>
    34. 

  34. </pre><pre class="programlisting">Function type: <a href="#xmlXPathAxisFunc">xmlXPathAxisFunc</a>
    35. 

  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)
    36. 

  36. </pre>
    37. 

  37. <pre class="programlisting">double	<a href="#xmlXPathCastBooleanToNumber">xmlXPathCastBooleanToNumber</a>	(int val)</pre>
    38. 

  38. <pre class="programlisting"><a href="libxml-xmlstring.html#xmlChar">xmlChar</a> *	<a href="#xmlXPathCastBooleanToString">xmlXPathCastBooleanToString</a>	(int val)</pre>
    39. 

  39. <pre class="programlisting">int	<a href="#xmlXPathCastNodeSetToBoolean">xmlXPathCastNodeSetToBoolean</a>	(<a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> ns)</pre>
    40. 

  40. <pre class="programlisting">double	<a href="#xmlXPathCastNodeSetToNumber">xmlXPathCastNodeSetToNumber</a>	(<a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> ns)</pre>
    41. 

  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. 

  42. <pre class="programlisting">double	<a href="#xmlXPathCastNodeToNumber">xmlXPathCastNodeToNumber</a>	(<a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> node)</pre>
    43. 

  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. 

  44. <pre class="programlisting">int	<a href="#xmlXPathCastNumberToBoolean">xmlXPathCastNumberToBoolean</a>	(double val)</pre>
    45. 

  45. <pre class="programlisting"><a href="libxml-xmlstring.html#xmlChar">xmlChar</a> *	<a href="#xmlXPathCastNumberToString">xmlXPathCastNumberToString</a>	(double val)</pre>
    46. 

  46. <pre class="programlisting">int	<a href="#xmlXPathCastStringToBoolean">xmlXPathCastStringToBoolean</a>	(const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * val)</pre>
    47. 

  47. <pre class="programlisting">double	<a href="#xmlXPathCastStringToNumber">xmlXPathCastStringToNumber</a>	(const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * val)</pre>
    48. 

  48. <pre class="programlisting">int	<a href="#xmlXPathCastToBoolean">xmlXPathCastToBoolean</a>		(<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> val)</pre>
    49. 

  49. <pre class="programlisting">double	<a href="#xmlXPathCastToNumber">xmlXPathCastToNumber</a>		(<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> val)</pre>
    50. 

  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. 

  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. 

  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. 

  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. 

  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. 

  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. 

  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. 

  57. <pre class="programlisting">Function type: <a href="#xmlXPathConvertFunc">xmlXPathConvertFunc</a>
    58. 

  58. int	<a href="#xmlXPathConvertFunc">xmlXPathConvertFunc</a>		(<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> obj, <br />					 int type)
    59. 

  59. </pre>
    60. 

  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. 

  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. 

  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. 

  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. 

  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. 

  65. <pre class="programlisting">Function type: <a href="#xmlXPathEvalFunc">xmlXPathEvalFunc</a>
    66. 

  66. void	<a href="#xmlXPathEvalFunc">xmlXPathEvalFunc</a>		(<a href="libxml-xpath.html#xmlXPathParserContextPtr">xmlXPathParserContextPtr</a> ctxt, <br />					 int nargs)
    67. 

  67. </pre>
    68. 

  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. 

  69. <pre class="programlisting">void	<a href="#xmlXPathFreeCompExpr">xmlXPathFreeCompExpr</a>		(<a href="libxml-xpath.html#xmlXPathCompExprPtr">xmlXPathCompExprPtr</a> comp)</pre>
    70. 

  70. <pre class="programlisting">void	<a href="#xmlXPathFreeContext">xmlXPathFreeContext</a>		(<a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctxt)</pre>
    71. 

  71. <pre class="programlisting">void	<a href="#xmlXPathFreeNodeSet">xmlXPathFreeNodeSet</a>		(<a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> obj)</pre>
    72. 

  72. <pre class="programlisting">void	<a href="#xmlXPathFreeNodeSetList">xmlXPathFreeNodeSetList</a>		(<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> obj)</pre>
    73. 

  73. <pre class="programlisting">void	<a href="#xmlXPathFreeObject">xmlXPathFreeObject</a>		(<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> obj)</pre>
    74. 

  74. <pre class="programlisting">Function type: <a href="#xmlXPathFuncLookupFunc">xmlXPathFuncLookupFunc</a>
    75. 

  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)
    76. 

  76. </pre>
    77. 

  77. <pre class="programlisting">Function type: <a href="#xmlXPathFunction">xmlXPathFunction</a>
    78. 

  78. void	<a href="#xmlXPathFunction">xmlXPathFunction</a>		(<a href="libxml-xpath.html#xmlXPathParserContextPtr">xmlXPathParserContextPtr</a> ctxt, <br />					 int nargs)
    79. 

  79. </pre>
    80. 

  80. <pre class="programlisting">void	<a href="#xmlXPathInit">xmlXPathInit</a>			(void)</pre>
    81. 

  81. <pre class="programlisting">int	<a href="#xmlXPathIsInf">xmlXPathIsInf</a>			(double val)</pre>
    82. 

  82. <pre class="programlisting">int	<a href="#xmlXPathIsNaN">xmlXPathIsNaN</a>			(double val)</pre>
    83. 

  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. 

  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. 

  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. 

  86. <pre class="programlisting">long	<a href="#xmlXPathOrderDocElems">xmlXPathOrderDocElems</a>		(<a href="libxml-tree.html#xmlDocPtr">xmlDocPtr</a> doc)</pre>
    87. 

  87. <pre class="programlisting">Function type: <a href="#xmlXPathVariableLookupFunc">xmlXPathVariableLookupFunc</a>
    88. 

  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)
    89. 

  89. </pre>
    90. 

  90. <h2>Description</h2>
    91. 

  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. 

  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. 

  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. 

  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. 

  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. 

  96. <h3><a name="xmlNodeSet" id="xmlNodeSet">Structure xmlNodeSet</a></h3><pre class="programlisting">Structure xmlNodeSet<br />struct _xmlNodeSet {
    97. 

  97.     int	nodeNr	: number of nodes in the set
    98. 

  98.     int	nodeMax	: size of the array as allocated
    99. 

  99.     <a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> *	nodeTab	: array of nodes in no particular order @
    100. 

  100. }</pre><h3><a name="xmlXPathAxis" id="xmlXPathAxis">Structure xmlXPathAxis</a></h3><pre class="programlisting">Structure xmlXPathAxis<br />struct _xmlXPathAxis {
    101. 

  101.     const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> *	name	: the axis name
    102. 

  102.     <a href="libxml-xpath.html#xmlXPathAxisFunc">xmlXPathAxisFunc</a>	func	: the search function
    103. 

  103. }</pre><h3><a name="xmlXPathCompExpr" id="xmlXPathCompExpr">Structure xmlXPathCompExpr</a></h3><pre class="programlisting">Structure xmlXPathCompExpr<br />struct _xmlXPathCompExpr {
    104. 

  104. The content of this structure is not made public by the API.
    105. 

  105. }</pre><h3><a name="xmlXPathContext" id="xmlXPathContext">Structure xmlXPathContext</a></h3><pre class="programlisting">Structure xmlXPathContext<br />struct _xmlXPathContext {
    106. 

  106.     <a href="libxml-tree.html#xmlDocPtr">xmlDocPtr</a>	doc	: The current document
    107. 

  107.     <a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a>	node	: The current node
    108. 

  108.     int	nb_variables_unused	: unused (hash table)
    109. 

  109.     int	max_variables_unused	: unused (hash table)
    110. 

  110.     <a href="libxml-hash.html#xmlHashTablePtr">xmlHashTablePtr</a>	varHash	: Hash table of defined variables
    111. 

  111.     int	nb_types	: number of defined types
    112. 

  112.     int	max_types	: max number of types
    113. 

  113.     <a href="libxml-xpath.html#xmlXPathTypePtr">xmlXPathTypePtr</a>	types	: Array of defined types
    114. 

  114.     int	nb_funcs_unused	: unused (hash table)
    115. 

  115.     int	max_funcs_unused	: unused (hash table)
    116. 

  116.     <a href="libxml-hash.html#xmlHashTablePtr">xmlHashTablePtr</a>	funcHash	: Hash table of defined funcs
    117. 

  117.     int	nb_axis	: number of defined axis
    118. 

  118.     int	max_axis	: max number of axis
    119. 

  119.     <a href="libxml-xpath.html#xmlXPathAxisPtr">xmlXPathAxisPtr</a>	axis	: Array of defined axis the namespace nod
    120. 

  120.     <a href="libxml-tree.html#xmlNsPtr">xmlNsPtr</a> *	namespaces	: Array of namespaces
    121. 

  121.     int	nsNr	: number of namespace in scope
    122. 

  122.     void *	user	: function to free extra variables
    123. 

  123.     int	contextSize	: the context size
    124. 

  124.     int	proximityPosition	: the proximity position extra stuff for
    125. 

  125.     int	xptr	: is this an XPointer context?
    126. 

  126.     <a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a>	here	: for here()
    127. 

  127.     <a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a>	origin	: for origin() the set of namespace decla
    128. 

  128.     <a href="libxml-hash.html#xmlHashTablePtr">xmlHashTablePtr</a>	nsHash	: The namespaces hash table
    129. 

  129.     <a href="libxml-xpath.html#xmlXPathVariableLookupFunc">xmlXPathVariableLookupFunc</a>	varLookupFunc	: variable lookup func
    130. 

  130.     void *	varLookupData	: variable lookup data Possibility to lin
    131. 

  131.     void *	extra	: needed for XSLT The function name and U
    132. 

  132.     const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> *	function
    133. 

  133.     const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> *	functionURI	: function lookup function and data
    134. 

  134.     <a href="libxml-xpath.html#xmlXPathFuncLookupFunc">xmlXPathFuncLookupFunc</a>	funcLookupFunc	: function lookup func
    135. 

  135.     void *	funcLookupData	: function lookup data temporary namespac
    136. 

  136.     <a href="libxml-tree.html#xmlNsPtr">xmlNsPtr</a> *	tmpNsList	: Array of namespaces
    137. 

  137.     int	tmpNsNr	: number of namespaces in scope error rep
    138. 

  138.     void *	userData	: user specific data block
    139. 

  139.     <a href="libxml-xmlerror.html#xmlStructuredErrorFunc">xmlStructuredErrorFunc</a>	error	: the callback in case of errors
    140. 

  140.     <a href="libxml-xmlerror.html#xmlError">xmlError</a>	lastError	: the last error
    141. 

  141.     <a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a>	debugNode	: the source node XSLT dictionary
    142. 

  142.     <a href="libxml-dict.html#xmlDictPtr">xmlDictPtr</a>	dict	: dictionary if any
    143. 

  143.     int	flags	: flags to control compilation Cache for
    144. 

  144.     void *	cache
    145. 

  145. }</pre><h3>Enum <a name="xmlXPathError" id="xmlXPathError">xmlXPathError</a></h3><pre class="programlisting">Enum xmlXPathError {
    146. 

  146.     <a name="XPATH_EXPRESSION_OK" id="XPATH_EXPRESSION_OK">XPATH_EXPRESSION_OK</a> = 0
    147. 

  147.     <a name="XPATH_NUMBER_ERROR" id="XPATH_NUMBER_ERROR">XPATH_NUMBER_ERROR</a> = 1
    148. 

  148.     <a name="XPATH_UNFINISHED_LITERAL_ERROR" id="XPATH_UNFINISHED_LITERAL_ERROR">XPATH_UNFINISHED_LITERAL_ERROR</a> = 2
    149. 

  149.     <a name="XPATH_START_LITERAL_ERROR" id="XPATH_START_LITERAL_ERROR">XPATH_START_LITERAL_ERROR</a> = 3
    150. 

  150.     <a name="XPATH_VARIABLE_REF_ERROR" id="XPATH_VARIABLE_REF_ERROR">XPATH_VARIABLE_REF_ERROR</a> = 4
    151. 

  151.     <a name="XPATH_UNDEF_VARIABLE_ERROR" id="XPATH_UNDEF_VARIABLE_ERROR">XPATH_UNDEF_VARIABLE_ERROR</a> = 5
    152. 

  152.     <a name="XPATH_INVALID_PREDICATE_ERROR" id="XPATH_INVALID_PREDICATE_ERROR">XPATH_INVALID_PREDICATE_ERROR</a> = 6
    153. 

  153.     <a name="XPATH_EXPR_ERROR" id="XPATH_EXPR_ERROR">XPATH_EXPR_ERROR</a> = 7
    154. 

  154.     <a name="XPATH_UNCLOSED_ERROR" id="XPATH_UNCLOSED_ERROR">XPATH_UNCLOSED_ERROR</a> = 8
    155. 

  155.     <a name="XPATH_UNKNOWN_FUNC_ERROR" id="XPATH_UNKNOWN_FUNC_ERROR">XPATH_UNKNOWN_FUNC_ERROR</a> = 9
    156. 

  156.     <a name="XPATH_INVALID_OPERAND" id="XPATH_INVALID_OPERAND">XPATH_INVALID_OPERAND</a> = 10
    157. 

  157.     <a name="XPATH_INVALID_TYPE" id="XPATH_INVALID_TYPE">XPATH_INVALID_TYPE</a> = 11
    158. 

  158.     <a name="XPATH_INVALID_ARITY" id="XPATH_INVALID_ARITY">XPATH_INVALID_ARITY</a> = 12
    159. 

  159.     <a name="XPATH_INVALID_CTXT_SIZE" id="XPATH_INVALID_CTXT_SIZE">XPATH_INVALID_CTXT_SIZE</a> = 13
    160. 

  160.     <a name="XPATH_INVALID_CTXT_POSITION" id="XPATH_INVALID_CTXT_POSITION">XPATH_INVALID_CTXT_POSITION</a> = 14
    161. 

  161.     <a name="XPATH_MEMORY_ERROR" id="XPATH_MEMORY_ERROR">XPATH_MEMORY_ERROR</a> = 15
    162. 

  162.     <a name="XPTR_SYNTAX_ERROR" id="XPTR_SYNTAX_ERROR">XPTR_SYNTAX_ERROR</a> = 16
    163. 

  163.     <a name="XPTR_RESOURCE_ERROR" id="XPTR_RESOURCE_ERROR">XPTR_RESOURCE_ERROR</a> = 17
    164. 

  164.     <a name="XPTR_SUB_RESOURCE_ERROR" id="XPTR_SUB_RESOURCE_ERROR">XPTR_SUB_RESOURCE_ERROR</a> = 18
    165. 

  165.     <a name="XPATH_UNDEF_PREFIX_ERROR" id="XPATH_UNDEF_PREFIX_ERROR">XPATH_UNDEF_PREFIX_ERROR</a> = 19
    166. 

  166.     <a name="XPATH_ENCODING_ERROR" id="XPATH_ENCODING_ERROR">XPATH_ENCODING_ERROR</a> = 20
    167. 

  167.     <a name="XPATH_INVALID_CHAR_ERROR" id="XPATH_INVALID_CHAR_ERROR">XPATH_INVALID_CHAR_ERROR</a> = 21
    168. 

  168.     <a name="XPATH_INVALID_CTXT" id="XPATH_INVALID_CTXT">XPATH_INVALID_CTXT</a> = 22
    169. 

  169. }
    170. 

  170. </pre><h3><a name="xmlXPathFunct" id="xmlXPathFunct">Structure xmlXPathFunct</a></h3><pre class="programlisting">Structure xmlXPathFunct<br />struct _xmlXPathFunct {
    171. 

  171.     const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> *	name	: the function name
    172. 

  172.     <a href="libxml-xpath.html#xmlXPathEvalFunc">xmlXPathEvalFunc</a>	func	: the evaluation function
    173. 

  173. }</pre><h3><a name="xmlXPathObject" id="xmlXPathObject">Structure xmlXPathObject</a></h3><pre class="programlisting">Structure xmlXPathObject<br />struct _xmlXPathObject {
    174. 

  174.     <a href="libxml-xpath.html#xmlXPathObjectType">xmlXPathObjectType</a>	type
    175. 

  175.     <a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a>	nodesetval
    176. 

  176.     int	boolval
    177. 

  177.     double	floatval
    178. 

  178.     <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> *	stringval
    179. 

  179.     void *	user
    180. 

  180.     int	index
    181. 

  181.     void *	user2
    182. 

  182.     int	index2
    183. 

  183. }</pre><h3>Enum <a name="xmlXPathObjectType" id="xmlXPathObjectType">xmlXPathObjectType</a></h3><pre class="programlisting">Enum xmlXPathObjectType {
    184. 

  184.     <a name="XPATH_UNDEFINED" id="XPATH_UNDEFINED">XPATH_UNDEFINED</a> = 0
    185. 

  185.     <a name="XPATH_NODESET" id="XPATH_NODESET">XPATH_NODESET</a> = 1
    186. 

  186.     <a name="XPATH_BOOLEAN" id="XPATH_BOOLEAN">XPATH_BOOLEAN</a> = 2
    187. 

  187.     <a name="XPATH_NUMBER" id="XPATH_NUMBER">XPATH_NUMBER</a> = 3
    188. 

  188.     <a name="XPATH_STRING" id="XPATH_STRING">XPATH_STRING</a> = 4
    189. 

  189.     <a name="XPATH_POINT" id="XPATH_POINT">XPATH_POINT</a> = 5
    190. 

  190.     <a name="XPATH_RANGE" id="XPATH_RANGE">XPATH_RANGE</a> = 6
    191. 

  191.     <a name="XPATH_LOCATIONSET" id="XPATH_LOCATIONSET">XPATH_LOCATIONSET</a> = 7
    192. 

  192.     <a name="XPATH_USERS" id="XPATH_USERS">XPATH_USERS</a> = 8
    193. 

  193.     <a name="XPATH_XSLT_TREE" id="XPATH_XSLT_TREE">XPATH_XSLT_TREE</a> = 9 : An XSLT value tree, non modifiable
    194. 

  194. }
    195. 

  195. </pre><h3><a name="xmlXPathParserContext" id="xmlXPathParserContext">Structure xmlXPathParserContext</a></h3><pre class="programlisting">Structure xmlXPathParserContext<br />struct _xmlXPathParserContext {
    196. 

  196.     const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> *	cur	: the current char being parsed
    197. 

  197.     const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> *	base	: the full expression
    198. 

  198.     int	error	: error code
    199. 

  199.     <a href="libxml-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a>	context	: the evaluation context
    200. 

  200.     <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a>	value	: the current value
    201. 

  201.     int	valueNr	: number of values stacked
    202. 

  202.     int	valueMax	: max number of values stacked
    203. 

  203.     <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> *	valueTab	: stack of values
    204. 

  204.     <a href="libxml-xpath.html#xmlXPathCompExprPtr">xmlXPathCompExprPtr</a>	comp	: the precompiled expression
    205. 

  205.     int	xptr	: it this an XPointer expression
    206. 

  206.     <a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a>	ancestor	: used for walking preceding axis
    207. 

  207. }</pre><h3><a name="xmlXPathType" id="xmlXPathType">Structure xmlXPathType</a></h3><pre class="programlisting">Structure xmlXPathType<br />struct _xmlXPathType {
    208. 

  208.     const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> *	name	: the type name
    209. 

  209.     <a href="libxml-xpath.html#xmlXPathConvertFunc">xmlXPathConvertFunc</a>	func	: the conversion function
    210. 

  210. }</pre><h3><a name="xmlXPathVariable" id="xmlXPathVariable">Structure xmlXPathVariable</a></h3><pre class="programlisting">Structure xmlXPathVariable<br />struct _xmlXPathVariable {
    211. 

  211.     const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> *	name	: the variable name
    212. 

  212.     <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a>	value	: the value
    213. 

  213. }</pre><h3><a name="xmlXPathAxisFunc" id="xmlXPathAxisFunc"></a>Function type: xmlXPathAxisFunc</h3><pre class="programlisting">Function type: xmlXPathAxisFunc
    214. 

  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. 

  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. 

  216. <h3><a name="xmlXPathCastBooleanToNumber" id="xmlXPathCastBooleanToNumber"></a>Function: xmlXPathCastBooleanToNumber</h3><pre class="programlisting">double	xmlXPathCastBooleanToNumber	(int val)<br />
    217. 

  217. </pre><p>Converts a boolean to its number value</p>
    218. 

  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. 

  219. </pre><p>Converts a boolean to its string value.</p>
    220. 

  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. 

  221. </pre><p>Converts a node-set to its boolean value</p>
    222. 

  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. 

  223. </pre><p>Converts a node-set to its number value</p>
    224. 

  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. 

  225. </pre><p>Converts a node-set to its string value.</p>
    226. 

  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. 

  227. </pre><p>Converts a node to its number value</p>
    228. 

  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. 

  229. </pre><p>Converts a node to its string value.</p>
    230. 

  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. 

  231. </pre><p>Converts a number to its boolean value</p>
    232. 

  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. 

  233. </pre><p>Converts a number to its string value.</p>
    234. 

  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. 

  235. </pre><p>Converts a string to its boolean value</p>
    236. 

  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. 

  237. </pre><p>Converts a string to its number value</p>
    238. 

  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. 

  239. </pre><p>Converts an XPath object to its boolean value</p>
    240. 

  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. 

  241. </pre><p>Converts an XPath object to its number value</p>
    242. 

  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. 

  243. </pre><p>Converts an existing object to its string() equivalent</p>
    244. 

  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. 

  245. </pre><p>Compare two nodes w.r.t document order</p>
    246. 

  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 &lt; 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. 

  247. </pre><p>Compile an XPath expression</p>
    248. 

  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. 

  249. </pre><p>Evaluate the Precompiled XPath expression in the given context.</p>
    250. 

  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. 

  251. </pre><p>Applies the XPath boolean() function on the result of the given compiled expression.</p>
    252. 

  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. 

  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 &lt;0 for the default number (100). Other values for @options have currently no effect.</p>
    254. 

  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. 

  255. </pre><p>Converts an existing object to its boolean() equivalent</p>
    256. 

  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. 

  257. int	xmlXPathConvertFunc		(<a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> obj, <br />					 int type)
    258. 

  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. 

  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. 

  260. </pre><p>Converts an existing object to its number() equivalent</p>
    261. 

  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. 

  262. </pre><p>Converts an existing object to its string() equivalent</p>
    263. 

  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. 

  264. </pre><p>Compile an XPath expression</p>
    265. 

  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. 

  266. </pre><p>Evaluate the XPath Location Path in the given context.</p>
    267. 

  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. 

  268. </pre><p>Evaluate the XPath expression in the given context.</p>
    269. 

  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. 

  270. void	xmlXPathEvalFunc		(<a href="libxml-xpath.html#xmlXPathParserContextPtr">xmlXPathParserContextPtr</a> ctxt, <br />					 int nargs)
    271. 

  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. 

  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. 

  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. 

  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. 

  275. </pre><p>Free up the memory allocated by @comp</p>
    276. 

  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. 

  277. </pre><p>Free up an <a href="libxml-xpath.html#xmlXPathContext">xmlXPathContext</a></p>
    278. 

  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. 

  279. </pre><p>Free the NodeSet compound (not the actual nodes !).</p>
    280. 

  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. 

  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. 

  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. 

  283. </pre><p>Free up an <a href="libxml-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> object.</p>
    284. 

  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. 

  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. 

  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. 

  287. <h3><a name="xmlXPathFunction" id="xmlXPathFunction"></a>Function type: xmlXPathFunction</h3><pre class="programlisting">Function type: xmlXPathFunction
    288. 

  288. void	xmlXPathFunction		(<a href="libxml-xpath.html#xmlXPathParserContextPtr">xmlXPathParserContextPtr</a> ctxt, <br />					 int nargs)
    289. 

  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. 

  290. <h3><a name="xmlXPathInit" id="xmlXPathInit"></a>Function: xmlXPathInit</h3><pre class="programlisting">void	xmlXPathInit			(void)<br />
    291. 

  291. </pre><p>Initialize the XPath environment</p>
    292. 

  292. <h3><a name="xmlXPathIsInf" id="xmlXPathIsInf"></a>Function: xmlXPathIsInf</h3><pre class="programlisting">int	xmlXPathIsInf			(double val)<br />
    293. 

  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. 

  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. 

  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. 

  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. 

  297. </pre><p>Create a new <a href="libxml-xpath.html#xmlXPathContext">xmlXPathContext</a></p>
    298. 

  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. 

  299. </pre><p>Create a new <a href="libxml-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> of type double and of value @val</p>
    300. 

  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. 

  301. </pre><p>allocate a new copy of a given object</p>
    302. 

  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. 

  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-&gt;content field, the value stored is actually - the node number (starting at -1) to be able to differentiate from line numbers.</p>
    304. 

  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. 

  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. 

  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. 

  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>
    308.