1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
<?xml version="1.0" encoding="UTF-8"?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<title>pattern: pattern expression handling</title>
<meta name="generator" content="Libxml2 devhelp stylesheet"/>
<link rel="start" href="index.html" title="libxml2 Reference Manual"/>
<link rel="up" href="general.html" title="API"/>
<link rel="stylesheet" href="style.css" type="text/css"/>
<link rel="chapter" href="general.html" title="API"/>
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2">
<tr valign="middle">
<td>
<a accesskey="p" href="libxml2-parserInternals.html">
<img src="left.png" width="24" height="24" border="0" alt="Prev"/>
</a>
</td>
<td>
<a accesskey="u" href="general.html">
<img src="up.png" width="24" height="24" border="0" alt="Up"/>
</a>
</td>
<td>
<a accesskey="h" href="index.html">
<img src="home.png" width="24" height="24" border="0" alt="Home"/>
</a>
</td>
<td>
<a accesskey="n" href="libxml2-relaxng.html">
<img src="right.png" width="24" height="24" border="0" alt="Next"/>
</a>
</td>
<th width="100%" align="center">libxml2 Reference Manual</th>
</tr>
</table>
<h2>
<span class="refentrytitle">pattern</span>
</h2>
<p>pattern - pattern expression handling</p>
<p>allows to compile and test pattern expressions for nodes either in a tree or based on a parser state. </p>
<p>Author(s): Daniel Veillard </p>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<pre class="synopsis">typedef <a href="libxml2-pattern.html#xmlStreamCtxt">xmlStreamCtxt</a> * <a href="#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a>;
typedef enum <a href="#xmlPatternFlags">xmlPatternFlags</a>;
typedef struct _xmlStreamCtxt <a href="#xmlStreamCtxt">xmlStreamCtxt</a>;
typedef struct _xmlPattern <a href="#xmlPattern">xmlPattern</a>;
typedef <a href="libxml2-pattern.html#xmlPattern">xmlPattern</a> * <a href="#xmlPatternPtr">xmlPatternPtr</a>;
int <a href="#xmlPatternMinDepth">xmlPatternMinDepth</a> (<a href="libxml2-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp);
<a href="libxml2-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> <a href="#xmlPatternGetStreamCtxt">xmlPatternGetStreamCtxt</a> (<a href="libxml2-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp);
int <a href="#xmlPatternFromRoot">xmlPatternFromRoot</a> (<a href="libxml2-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp);
void <a href="#xmlFreePatternList">xmlFreePatternList</a> (<a href="libxml2-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp);
int <a href="#xmlPatternStreamable">xmlPatternStreamable</a> (<a href="libxml2-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp);
int <a href="#xmlStreamPushAttr">xmlStreamPushAttr</a> (<a href="libxml2-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> stream, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * ns);
int <a href="#xmlPatternMatch">xmlPatternMatch</a> (<a href="libxml2-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp, <br/> <a href="libxml2-tree.html#xmlNodePtr">xmlNodePtr</a> node);
int <a href="#xmlStreamWantsAnyNode">xmlStreamWantsAnyNode</a> (<a href="libxml2-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> streamCtxt);
int <a href="#xmlStreamPop">xmlStreamPop</a> (<a href="libxml2-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> stream);
void <a href="#xmlFreePattern">xmlFreePattern</a> (<a href="libxml2-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp);
int <a href="#xmlStreamPush">xmlStreamPush</a> (<a href="libxml2-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> stream, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * ns);
int <a href="#xmlPatternMaxDepth">xmlPatternMaxDepth</a> (<a href="libxml2-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp);
<a href="libxml2-pattern.html#xmlPatternPtr">xmlPatternPtr</a> <a href="#xmlPatterncompile">xmlPatterncompile</a> (const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * pattern, <br/> <a href="libxml2-dict.html#xmlDict">xmlDict</a> * dict, <br/> int flags, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** namespaces);
int <a href="#xmlStreamPushNode">xmlStreamPushNode</a> (<a href="libxml2-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> stream, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * ns, <br/> int nodeType);
void <a href="#xmlFreeStreamCtxt">xmlFreeStreamCtxt</a> (<a href="libxml2-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> stream);
</pre>
</div>
<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="xmlPattern">Structure </a>xmlPattern</h3><pre class="programlisting">struct _xmlPattern {
The content of this structure is not made public by the API.
} xmlPattern;
</pre><p/>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlPatternFlags">Enum </a>xmlPatternFlags</h3><pre class="programlisting">enum <a href="#xmlPatternFlags">xmlPatternFlags</a> {
<a name="XML_PATTERN_DEFAULT">XML_PATTERN_DEFAULT</a> = 0 /* simple pattern match */
<a name="XML_PATTERN_XPATH">XML_PATTERN_XPATH</a> = 1 /* standard XPath pattern */
<a name="XML_PATTERN_XSSEL">XML_PATTERN_XSSEL</a> = 2 /* XPath subset for schema selector */
<a name="XML_PATTERN_XSFIELD">XML_PATTERN_XSFIELD</a> = 4 /* XPath subset for schema field */
};
</pre><p/>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlPatternPtr">Typedef </a>xmlPatternPtr</h3><pre class="programlisting"><a href="libxml2-pattern.html#xmlPattern">xmlPattern</a> * xmlPatternPtr;
</pre><p/>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlStreamCtxt">Structure </a>xmlStreamCtxt</h3><pre class="programlisting">struct _xmlStreamCtxt {
The content of this structure is not made public by the API.
} xmlStreamCtxt;
</pre><p/>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlStreamCtxtPtr">Typedef </a>xmlStreamCtxtPtr</h3><pre class="programlisting"><a href="libxml2-pattern.html#xmlStreamCtxt">xmlStreamCtxt</a> * xmlStreamCtxtPtr;
</pre><p/>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlFreePattern"/>xmlFreePattern ()</h3><pre class="programlisting">void xmlFreePattern (<a href="libxml2-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp)<br/>
</pre><p>Free up the memory allocated by @comp</p>
<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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlFreePatternList"/>xmlFreePatternList ()</h3><pre class="programlisting">void xmlFreePatternList (<a href="libxml2-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp)<br/>
</pre><p>Free up the memory allocated by all the elements of @comp</p>
<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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlFreeStreamCtxt"/>xmlFreeStreamCtxt ()</h3><pre class="programlisting">void xmlFreeStreamCtxt (<a href="libxml2-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> stream)<br/>
</pre><p>Free the stream context</p>
<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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlPatternFromRoot"/>xmlPatternFromRoot ()</h3><pre class="programlisting">int xmlPatternFromRoot (<a href="libxml2-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp)<br/>
</pre><p>Check if the pattern must be looked at from the root.</p>
<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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlPatternGetStreamCtxt"/>xmlPatternGetStreamCtxt ()</h3><pre class="programlisting"><a href="libxml2-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> xmlPatternGetStreamCtxt (<a href="libxml2-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp)<br/>
</pre><p>Get a streaming context for that pattern Use <a href="libxml2-pattern.html#xmlFreeStreamCtxt">xmlFreeStreamCtxt</a> to free the context.</p>
<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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlPatternMatch"/>xmlPatternMatch ()</h3><pre class="programlisting">int xmlPatternMatch (<a href="libxml2-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp, <br/> <a href="libxml2-tree.html#xmlNodePtr">xmlNodePtr</a> node)<br/>
</pre><p>Test whether the node matches the pattern</p>
<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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlPatternMaxDepth"/>xmlPatternMaxDepth ()</h3><pre class="programlisting">int xmlPatternMaxDepth (<a href="libxml2-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp)<br/>
</pre><p>Check the maximum depth reachable by a pattern</p>
<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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlPatternMinDepth"/>xmlPatternMinDepth ()</h3><pre class="programlisting">int xmlPatternMinDepth (<a href="libxml2-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp)<br/>
</pre><p>Check the minimum depth reachable by a pattern, 0 mean the / or . are part of the set.</p>
<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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlPatternStreamable"/>xmlPatternStreamable ()</h3><pre class="programlisting">int xmlPatternStreamable (<a href="libxml2-pattern.html#xmlPatternPtr">xmlPatternPtr</a> comp)<br/>
</pre><p>Check if the pattern is streamable i.e. xmlPatternGetStreamCtxt() should work.</p>
<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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlPatterncompile"/>xmlPatterncompile ()</h3><pre class="programlisting"><a href="libxml2-pattern.html#xmlPatternPtr">xmlPatternPtr</a> xmlPatterncompile (const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * pattern, <br/> <a href="libxml2-dict.html#xmlDict">xmlDict</a> * dict, <br/> int flags, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** namespaces)<br/>
</pre><p>Compile a pattern.</p>
<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="libxml2-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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlStreamPop"/>xmlStreamPop ()</h3><pre class="programlisting">int xmlStreamPop (<a href="libxml2-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> stream)<br/>
</pre><p>push one level from the stream.</p>
<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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlStreamPush"/>xmlStreamPush ()</h3><pre class="programlisting">int xmlStreamPush (<a href="libxml2-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> stream, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * ns)<br/>
</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>
<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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlStreamPushAttr"/>xmlStreamPushAttr ()</h3><pre class="programlisting">int xmlStreamPushAttr (<a href="libxml2-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> stream, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * ns)<br/>
</pre><p>Push new <a href="libxml2-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>
<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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlStreamPushNode"/>xmlStreamPushNode ()</h3><pre class="programlisting">int xmlStreamPushNode (<a href="libxml2-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> stream, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br/> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * ns, <br/> int nodeType)<br/>
</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>
<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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlStreamWantsAnyNode"/>xmlStreamWantsAnyNode ()</h3><pre class="programlisting">int xmlStreamWantsAnyNode (<a href="libxml2-pattern.html#xmlStreamCtxtPtr">xmlStreamCtxtPtr</a> streamCtxt)<br/>
</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>
<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></div>
<hr/>
</div>
</div>
</body>
</html>
|
