libxml2-xpathinternals.html

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

<a href="libxml2-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a>	<a href="#xmlXPathNodeTrailing">xmlXPathNodeTrailing</a>	(<a href="libxml2-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> nodes, <br/>					 <a href="libxml2-tree.html#xmlNodePtr">xmlNodePtr</a> node);
void	<a href="#xmlXPathNodeSetAdd">xmlXPathNodeSetAdd</a>		(<a href="libxml2-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> cur, <br/>					 <a href="libxml2-tree.html#xmlNodePtr">xmlNodePtr</a> val);
void	<a href="#xmlXPathNodeSetAddUnique">xmlXPathNodeSetAddUnique</a>	(<a href="libxml2-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> cur, <br/>					 <a href="libxml2-tree.html#xmlNodePtr">xmlNodePtr</a> val);
<a href="libxml2-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a>	<a href="#xmlXPathNewValueTree">xmlXPathNewValueTree</a>	(<a href="libxml2-tree.html#xmlNodePtr">xmlNodePtr</a> val);
<a href="libxml2-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a>	<a href="#xmlXPathDistinct">xmlXPathDistinct</a>	(<a href="libxml2-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> nodes);
<a href="libxml2-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a>	<a href="#xmlXPathVariableLookup">xmlXPathVariableLookup</a>	(<a href="libxml2-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctxt, <br/>						 const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name);
void	<a href="#xmlXPathNotFunction">xmlXPathNotFunction</a>		(<a href="libxml2-xpath.html#xmlXPathParserContextPtr">xmlXPathParserContextPtr</a> ctxt, <br/>					 int nargs);
double	<a href="#xmlXPathStringEvalNumber">xmlXPathStringEvalNumber</a>	(const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * str);
<a href="libxml2-tree.html#xmlNodePtr">xmlNodePtr</a>	<a href="#xmlXPathNextDescendantOrSelf">xmlXPathNextDescendantOrSelf</a>	(<a href="libxml2-xpath.html#xmlXPathParserContextPtr">xmlXPathParserContextPtr</a> ctxt, <br/>						 <a href="libxml2-tree.html#xmlNodePtr">xmlNodePtr</a> cur);
<a href="libxml2-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a>	<a href="#xmlXPathWrapExternal">xmlXPathWrapExternal</a>	(void * val);
<a href="libxml2-tree.html#xmlNodePtr">xmlNodePtr</a>	<a href="#xmlXPathNextAttribute">xmlXPathNextAttribute</a>	(<a href="libxml2-xpath.html#xmlXPathParserContextPtr">xmlXPathParserContextPtr</a> ctxt, <br/>					 <a href="libxml2-tree.html#xmlNodePtr">xmlNodePtr</a> cur);
void	<a href="#xmlXPathDivValues">xmlXPathDivValues</a>		(<a href="libxml2-xpath.html#xmlXPathParserContextPtr">xmlXPathParserContextPtr</a> ctxt);
<a href="libxml2-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a>	<a href="#xmlXPathVariableLookupNS">xmlXPathVariableLookupNS</a>	(<a href="libxml2-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctxt, <br/>							 const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/>							 const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * ns_uri);
int	<a href="#xmlXPathRegisterVariableNS">xmlXPathRegisterVariableNS</a>	(<a href="libxml2-xpath.html#xmlXPathContextPtr">xmlXPathContextPtr</a> ctxt, <br/>					 const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/>					 const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * ns_uri, <br/>					 <a href="libxml2-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> value);
<a href="libxml2-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a>	<a href="#xmlXPathTrailing">xmlXPathTrailing</a>	(<a href="libxml2-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> nodes1, <br/>					 <a href="libxml2-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> nodes2);
void	<a href="#xmlXPathEvalExpr">xmlXPathEvalExpr</a>		(<a href="libxml2-xpath.html#xmlXPathParserContextPtr">xmlXPathParserContextPtr</a> ctxt);
void	<a href="#xmlXPathDebugDumpObject">xmlXPathDebugDumpObject</a>		(FILE * output, <br/>					 <a href="libxml2-xpath.html#xmlXPathObjectPtr">xmlXPathObjectPtr</a> cur, <br/>					 int depth);
<a href="libxml2-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a>	<a href="#xmlXPathLeading">xmlXPathLeading</a>		(<a href="libxml2-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> nodes1, <br/>					 <a href="libxml2-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> nodes2);
<a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> *	<a href="#xmlXPathParseName">xmlXPathParseName</a>	(<a href="libxml2-xpath.html#xmlXPathParserContextPtr">xmlXPathParserContextPtr</a> ctxt);
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    <div class="refsect1" lang="en">
      <h2>Description</h2>
    </div>
    <div class="refsect1" lang="en">
      <h2>Details</h2>
      <div class="refsect2" lang="en">
        <div class="refsect2" lang="en"><h3><a name="CAST_TO_BOOLEAN">Macro </a>CAST_TO_BOOLEAN</h3><pre class="programlisting">#define <a href="#CAST_TO_BOOLEAN">CAST_TO_BOOLEAN</a>;
</pre><p>Macro to try to cast the value on the top of the XPath stack to a boolean.</p>
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        <hr/>
        <div class="refsect2" lang="en"><h3><a name="CAST_TO_NUMBER">Macro </a>CAST_TO_NUMBER</h3><pre class="programlisting">#define <a href="#CAST_TO_NUMBER">CAST_TO_NUMBER</a>;
</pre><p>Macro to try to cast the value on the top of the XPath stack to a number.</p>
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        <hr/>
        <div class="refsect2" lang="en"><h3><a name="CAST_TO_STRING">Macro </a>CAST_TO_STRING</h3><pre class="programlisting">#define <a href="#CAST_TO_STRING">CAST_TO_STRING</a>;
</pre><p>Macro to try to cast the value on the top of the XPath stack to a string.</p>
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        <hr/>
        <div class="refsect2" lang="en"><h3><a name="CHECK_ARITY">Macro </a>CHECK_ARITY</h3><pre class="programlisting">#define <a href="#CHECK_ARITY">CHECK_ARITY</a>(x);
</pre><p>Macro to check that the number of args passed to an XPath function matches.</p><div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>x</tt></i>:</span></td><td>the number of expected args</td></tr></tbody></table></div>
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        <div class="refsect2" lang="en"><h3><a name="CHECK_ERROR">Macro </a>CHECK_ERROR</h3><pre class="programlisting">#define <a href="#CHECK_ERROR">CHECK_ERROR</a>;
</pre><p>Macro to return from the function if an XPath error was detected.</p>
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        <hr/>
        <div class="refsect2" lang="en"><h3><a name="CHECK_ERROR0">Macro </a>CHECK_ERROR0</h3><pre class="programlisting">#define <a href="#CHECK_ERROR0">CHECK_ERROR0</a>;
</pre><p>Macro to return 0 from the function if an XPath error was detected.</p>
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        <hr/>
        <div class="refsect2" lang="en"><h3><a name="CHECK_TYPE">Macro </a>CHECK_TYPE</h3><pre class="programlisting">#define <a href="#CHECK_TYPE">CHECK_TYPE</a>(typeval);
</pre><p>Macro to check that the value on top of the XPath stack is of a given type.</p><div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>typeval</tt></i>:</span></td><td>the XPath type</td></tr></tbody></table></div>
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        <hr/>
        <div class="refsect2" lang="en"><h3><a name="CHECK_TYPE0">Macro </a>CHECK_TYPE0</h3><pre class="programlisting">#define <a href="#CHECK_TYPE0">CHECK_TYPE0</a>(typeval);
</pre><p>Macro to check that the value on top of the XPath stack is of a given type. Return(0) in case of failure</p><div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>typeval</tt></i>:</span></td><td>the XPath type</td></tr></tbody></table></div>
</div>
        <hr/>
        <div class="refsect2" lang="en"><h3><a name="XP_ERROR">Macro </a>XP_ERROR</h3><pre class="programlisting">#define <a href="#XP_ERROR">XP_ERROR</a>(X);
</pre><p>Macro to raise an XPath error and return.</p><div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>X</tt></i>:</span></td><td>the error code</td></tr></tbody></table></div>
</div>
        <hr/>
        <div class="refsect2" lang="en"><h3><a name="XP_ERROR0">Macro </a>XP_ERROR0</h3><pre class="programlisting">#define <a href="#XP_ERROR0">XP_ERROR0</a>(X);
</pre><p>Macro to raise an XPath error and return 0.</p><div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>X</tt></i>:</span></td><td>the error code</td></tr></tbody></table></div>
</div>
        <hr/>
        <div class="refsect2" lang="en"><h3><a name="xmlXPathCheckError">Macro </a>xmlXPathCheckError</h3><pre class="programlisting">#define <a href="#xmlXPathCheckError">xmlXPathCheckError</a>(ctxt);
</pre><p>Check if an XPath error was raised. Returns true if an error has been raised, false otherwise.</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></tbody></table></div>
</div>
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        <div class="refsect2" lang="en"><h3><a name="xmlXPathEmptyNodeSet">Macro </a>xmlXPathEmptyNodeSet</h3><pre class="programlisting">#define <a href="#xmlXPathEmptyNodeSet">xmlXPathEmptyNodeSet</a>(ns);
</pre><p>Empties a node-set.</p><div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>ns</tt></i>:</span></td><td>a node-set</td></tr></tbody></table></div>
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        <hr/>
        <div class="refsect2" lang="en"><h3><a name="xmlXPathGetContextNode">Macro </a>xmlXPathGetContextNode</h3><pre class="programlisting">#define <a href="#xmlXPathGetContextNode">xmlXPathGetContextNode</a>(ctxt);
</pre><p>Get the context node of an XPath context. Returns the context node.</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></tbody></table></div>
</div>
        <hr/>
        <div class="refsect2" lang="en"><h3><a name="xmlXPathGetDocument">Macro </a>xmlXPathGetDocument</h3><pre class="programlisting">#define <a href="#xmlXPathGetDocument">xmlXPathGetDocument</a>(ctxt);
</pre><p>Get the document of an XPath context. Returns the context document.</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></tbody></table></div>
</div>
        <hr/>
        <div class="refsect2" lang="en"><h3><a name="xmlXPathGetError">Macro </a>xmlXPathGetError</h3><pre class="programlisting">#define <a href="#xmlXPathGetError">xmlXPathGetError</a>(ctxt);
</pre><p>Get the error code of an XPath context. Returns the context error.</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></tbody></table></div>
</div>