1<?xml version="1.0" encoding="UTF-8"?> 2<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 3<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><link rel="SHORTCUT ICON" href="/favicon.ico" /><style type="text/css"> 4TD {font-family: Verdana,Arial,Helvetica} 5BODY {font-family: Verdana,Arial,Helvetica; margin-top: 2em; margin-left: 0em; margin-right: 0em} 6H1 {font-family: Verdana,Arial,Helvetica} 7H2 {font-family: Verdana,Arial,Helvetica} 8H3 {font-family: Verdana,Arial,Helvetica} 9A:link, A:visited, A:active { text-decoration: underline } 10</style><style type="text/css"> 11 div.deprecated pre.programlisting {border-style: double;border-color:red} 12 pre.programlisting {border-style: double;background: #EECFA1} 13 </style><title>Module pattern from libxml2</title></head><body bgcolor="#8b7765" text="#000000" link="#a06060" vlink="#000000"><table 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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-relaxng.html">relaxng</a></th><td><a accesskey="n" href="libxml-relaxng.html"><img src="right.png" width="24" height="24" border="0" alt="Next" /></a></td></tr></table><p>allows to compile and test pattern expressions for nodes either in a tree or based on a parser state. </p><h2>Table of Contents</h2><pre class="programlisting">Structure <a href="#xmlPattern">xmlPattern</a><br />struct _xmlPattern 14The content of this structure is not made public by the API. 15</pre><pre class="programlisting">Enum <a href="#xmlPatternFlags">xmlPatternFlags</a> 16</pre><pre class="programlisting">Typedef <a href="libxml-pattern.html#xmlPattern">xmlPattern</a> * <a name="xmlPatternPtr" id="xmlPatternPtr">xmlPatternPtr</a> 17</pre><pre class="programlisting">Structure <a href="#xmlStreamCtxt">xmlStreamCtxt</a><br />struct _xmlStreamCtxt 18The content of this structure is not made public by the API. 19</pre><pre class="programlisting">Typedef <a href="libxml-pattern.html#xmlStreamCtxt">xmlStreamCtxt</a> * <a name="xmlStreamCtxtPtr" id="xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> 20</pre><pre class="programlisting">void <a href="#xmlFreePattern">xmlFreePattern</a> (<a href="libxml-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp)</pre> 21<pre class="programlisting">void <a href="#xmlFreePatternList">xmlFreePatternList</a> (<a href="libxml-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp)</pre> 22<pre class="programlisting">void <a href="#xmlFreeStreamCtxt">xmlFreeStreamCtxt</a> (<a href="libxml-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> stream)</pre> 23<pre class="programlisting">int <a href="#xmlPatternFromRoot">xmlPatternFromRoot</a> (<a href="libxml-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp)</pre> 24<pre class="programlisting"><a href="libxml-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> <a href="#xmlPatternGetStreamCtxt">xmlPatternGetStreamCtxt</a> (<a href="libxml-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp)</pre> 25<pre class="programlisting">int <a href="#xmlPatternMatch">xmlPatternMatch</a> (<a href="libxml-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp, <br /> <a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> node)</pre> 26<pre class="programlisting">int <a href="#xmlPatternMaxDepth">xmlPatternMaxDepth</a> (<a href="libxml-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp)</pre> 27<pre class="programlisting">int <a href="#xmlPatternMinDepth">xmlPatternMinDepth</a> (<a href="libxml-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp)</pre> 28<pre class="programlisting">int <a href="#xmlPatternStreamable">xmlPatternStreamable</a> (<a href="libxml-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp)</pre> 29<pre class="programlisting"><a href="libxml-pattern.html#xmlPatternPtr">xmlPatternPtr</a> <a href="#xmlPatterncompile">xmlPatterncompile</a> (const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * pattern, <br /> <a href="libxml-dict.html#xmlDict">xmlDict</a> * dict, <br /> int flags, <br /> const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> ** namespaces)</pre> 30<pre class="programlisting">int <a href="#xmlStreamPop">xmlStreamPop</a> (<a href="libxml-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> stream)</pre> 31<pre class="programlisting">int <a href="#xmlStreamPush">xmlStreamPush</a> (<a href="libxml-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> stream, <br /> const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * name, <br /> const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * ns)</pre> 32<pre class="programlisting">int <a href="#xmlStreamPushAttr">xmlStreamPushAttr</a> (<a href="libxml-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> stream, <br /> const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * name, <br /> const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * ns)</pre> 33<pre class="programlisting">int <a href="#xmlStreamPushNode">xmlStreamPushNode</a> (<a href="libxml-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> stream, <br /> const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * name, <br /> const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * ns, <br /> int nodeType)</pre> 34<pre class="programlisting">int <a href="#xmlStreamWantsAnyNode">xmlStreamWantsAnyNode</a> (<a href="libxml-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> streamCtxt)</pre> 35<h2>Description</h2> 36<h3><a name="xmlPattern" id="xmlPattern">Structure xmlPattern</a></h3><pre class="programlisting">Structure xmlPattern<br />struct _xmlPattern { 37The content of this structure is not made public by the API. 38}</pre><h3>Enum <a name="xmlPatternFlags" id="xmlPatternFlags">xmlPatternFlags</a></h3><pre class="programlisting">Enum xmlPatternFlags { 39 <a name="XML_PATTERN_DEFAULT" id="XML_PATTERN_DEFAULT">XML_PATTERN_DEFAULT</a> = 0 : simple pattern match 40 <a name="XML_PATTERN_XPATH" id="XML_PATTERN_XPATH">XML_PATTERN_XPATH</a> = 1 : standard XPath pattern 41 <a name="XML_PATTERN_XSSEL" id="XML_PATTERN_XSSEL">XML_PATTERN_XSSEL</a> = 2 : XPath subset for schema selector 42 <a name="XML_PATTERN_XSFIELD" id="XML_PATTERN_XSFIELD">XML_PATTERN_XSFIELD</a> = 4 : XPath subset for schema field 43} 44</pre><h3><a name="xmlStreamCtxt" id="xmlStreamCtxt">Structure xmlStreamCtxt</a></h3><pre class="programlisting">Structure xmlStreamCtxt<br />struct _xmlStreamCtxt { 45The content of this structure is not made public by the API. 46}</pre><h3><a name="xmlFreePattern" id="xmlFreePattern"></a>Function: xmlFreePattern</h3><pre class="programlisting">void xmlFreePattern (<a href="libxml-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp)<br /> 47</pre><p>Free up the memory allocated by @comp</p> 48<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>comp</tt></i>:</span></td><td>an XSLT comp</td></tr></tbody></table></div><h3><a name="xmlFreePatternList" id="xmlFreePatternList"></a>Function: xmlFreePatternList</h3><pre class="programlisting">void xmlFreePatternList (<a href="libxml-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp)<br /> 49</pre><p>Free up the memory allocated by all the elements of @comp</p> 50<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>comp</tt></i>:</span></td><td>an XSLT comp list</td></tr></tbody></table></div><h3><a name="xmlFreeStreamCtxt" id="xmlFreeStreamCtxt"></a>Function: xmlFreeStreamCtxt</h3><pre class="programlisting">void xmlFreeStreamCtxt (<a href="libxml-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> stream)<br /> 51</pre><p>Free the stream context</p> 52<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>stream</tt></i>:</span></td><td>the stream context</td></tr></tbody></table></div><h3><a name="xmlPatternFromRoot" id="xmlPatternFromRoot"></a>Function: xmlPatternFromRoot</h3><pre class="programlisting">int xmlPatternFromRoot (<a href="libxml-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp)<br /> 53</pre><p>Check if the pattern must be looked at from the root.</p> 54<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>comp</tt></i>:</span></td><td>the precompiled pattern</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>1 if true, 0 if false and -1 in case of error</td></tr></tbody></table></div><h3><a name="xmlPatternGetStreamCtxt" id="xmlPatternGetStreamCtxt"></a>Function: xmlPatternGetStreamCtxt</h3><pre class="programlisting"><a href="libxml-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> xmlPatternGetStreamCtxt (<a href="libxml-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp)<br /> 55</pre><p>Get a streaming context for that pattern Use <a href="libxml-pattern.html#xmlFreeStreamCtxt">xmlFreeStreamCtxt</a> to free the context.</p> 56<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>comp</tt></i>:</span></td><td>the precompiled pattern</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a pointer to the context or NULL in case of failure</td></tr></tbody></table></div><h3><a name="xmlPatternMatch" id="xmlPatternMatch"></a>Function: xmlPatternMatch</h3><pre class="programlisting">int xmlPatternMatch (<a href="libxml-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp, <br /> <a href="libxml-tree.html#xmlNodePtr">xmlNodePtr</a> node)<br /> 57</pre><p>Test whether the node matches the pattern</p> 58<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>comp</tt></i>:</span></td><td>the precompiled pattern</td></tr><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>1 if it matches, 0 if it doesn't and -1 in case of failure</td></tr></tbody></table></div><h3><a name="xmlPatternMaxDepth" id="xmlPatternMaxDepth"></a>Function: xmlPatternMaxDepth</h3><pre class="programlisting">int xmlPatternMaxDepth (<a href="libxml-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp)<br /> 59</pre><p>Check the maximum depth reachable by a pattern</p> 60<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>comp</tt></i>:</span></td><td>the precompiled pattern</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>-2 if no limit (using //), otherwise the depth, and -1 in case of error</td></tr></tbody></table></div><h3><a name="xmlPatternMinDepth" id="xmlPatternMinDepth"></a>Function: xmlPatternMinDepth</h3><pre class="programlisting">int xmlPatternMinDepth (<a href="libxml-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp)<br /> 61</pre><p>Check the minimum depth reachable by a pattern, 0 mean the / or . are part of the set.</p> 62<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>comp</tt></i>:</span></td><td>the precompiled pattern</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of error otherwise the depth,</td></tr></tbody></table></div><h3><a name="xmlPatternStreamable" id="xmlPatternStreamable"></a>Function: xmlPatternStreamable</h3><pre class="programlisting">int xmlPatternStreamable (<a href="libxml-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp)<br /> 63</pre><p>Check if the pattern is streamable i.e. xmlPatternGetStreamCtxt() should work.</p> 64<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>comp</tt></i>:</span></td><td>the precompiled pattern</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>1 if streamable, 0 if not and -1 in case of error.</td></tr></tbody></table></div><h3><a name="xmlPatterncompile" id="xmlPatterncompile"></a>Function: xmlPatterncompile</h3><pre class="programlisting"><a href="libxml-pattern.html#xmlPatternPtr">xmlPatternPtr</a> xmlPatterncompile (const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * pattern, <br /> <a href="libxml-dict.html#xmlDict">xmlDict</a> * dict, <br /> int flags, <br /> const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> ** namespaces)<br /> 65</pre><p>Compile a pattern.</p> 66<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>pattern</tt></i>:</span></td><td>the pattern to compile</td></tr><tr><td><span class="term"><i><tt>dict</tt></i>:</span></td><td>an optional dictionary for interned strings</td></tr><tr><td><span class="term"><i><tt>flags</tt></i>:</span></td><td>compilation flags, see <a href="libxml-pattern.html#xmlPatternFlags">xmlPatternFlags</a></td></tr><tr><td><span class="term"><i><tt>namespaces</tt></i>:</span></td><td>the prefix definitions, array of [URI, prefix] or NULL</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the compiled form of the pattern or NULL in case of error</td></tr></tbody></table></div><h3><a name="xmlStreamPop" id="xmlStreamPop"></a>Function: xmlStreamPop</h3><pre class="programlisting">int xmlStreamPop (<a href="libxml-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> stream)<br /> 67</pre><p>push one level from the stream.</p> 68<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>stream</tt></i>:</span></td><td>the stream context</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><h3><a name="xmlStreamPush" id="xmlStreamPush"></a>Function: xmlStreamPush</h3><pre class="programlisting">int xmlStreamPush (<a href="libxml-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> stream, <br /> const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * name, <br /> const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * ns)<br /> 69</pre><p>Push new data onto the stream. NOTE: if the call xmlPatterncompile() indicated a dictionary, then strings for name and ns will be expected to come from the dictionary. Both @name and @ns being NULL means the / i.e. the root of the document. This can also act as a reset. Otherwise the function will act as if it has been given an element-node.</p> 70<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>stream</tt></i>:</span></td><td>the stream context</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the current name</td></tr><tr><td><span class="term"><i><tt>ns</tt></i>:</span></td><td>the namespace name</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of error, 1 if the current state in the stream is a match and 0 otherwise.</td></tr></tbody></table></div><h3><a name="xmlStreamPushAttr" id="xmlStreamPushAttr"></a>Function: xmlStreamPushAttr</h3><pre class="programlisting">int xmlStreamPushAttr (<a href="libxml-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> stream, <br /> const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * name, <br /> const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * ns)<br /> 71</pre><p>Push new <a href="libxml-SAX.html#attribute">attribute</a> data onto the stream. NOTE: if the call xmlPatterncompile() indicated a dictionary, then strings for name and ns will be expected to come from the dictionary. Both @name and @ns being NULL means the / i.e. the root of the document. This can also act as a reset. Otherwise the function will act as if it has been given an attribute-node.</p> 72<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>stream</tt></i>:</span></td><td>the stream context</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the current name</td></tr><tr><td><span class="term"><i><tt>ns</tt></i>:</span></td><td>the namespace name</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of error, 1 if the current state in the stream is a match and 0 otherwise.</td></tr></tbody></table></div><h3><a name="xmlStreamPushNode" id="xmlStreamPushNode"></a>Function: xmlStreamPushNode</h3><pre class="programlisting">int xmlStreamPushNode (<a href="libxml-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> stream, <br /> const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * name, <br /> const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * ns, <br /> int nodeType)<br /> 73</pre><p>Push new data onto the stream. NOTE: if the call xmlPatterncompile() indicated a dictionary, then strings for name and ns will be expected to come from the dictionary. Both @name and @ns being NULL means the / i.e. the root of the document. This can also act as a reset. Different from xmlStreamPush() this function can be fed with nodes of type: element-, attribute-, text-, cdata-section-, comment- and processing-instruction-node.</p> 74<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>stream</tt></i>:</span></td><td>the stream context</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the current name</td></tr><tr><td><span class="term"><i><tt>ns</tt></i>:</span></td><td>the namespace name</td></tr><tr><td><span class="term"><i><tt>nodeType</tt></i>:</span></td><td>the type of the node being pushed</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of error, 1 if the current state in the stream is a match and 0 otherwise.</td></tr></tbody></table></div><h3><a name="xmlStreamWantsAnyNode" id="xmlStreamWantsAnyNode"></a>Function: xmlStreamWantsAnyNode</h3><pre class="programlisting">int xmlStreamWantsAnyNode (<a href="libxml-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> streamCtxt)<br /> 75</pre><p>Query if the streaming pattern additionally needs to be fed with text-, cdata-section-, comment- and processing-instruction-nodes. If the result is 0 then only element-nodes and attribute-nodes need to be pushed.</p> 76<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>streamCtxt</tt></i>:</span></td><td>the stream context</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>1 in case of need of nodes of the above described types, 0 otherwise. -1 on API errors.</td></tr></tbody></table></div><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> 77
