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  13     </style><title>Module xmlregexp 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 xmlregexp 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://www.blastwave.org/packages.php/libxml2">Solaris binaries</a></li><li><a href="http://www.explain.com.au/oss/libxml2xslt.html">MacOsX binaries</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 href="http://rubyforge.org/projects/xml-tools/">Ruby bindings</a></li><li><a href="http://tclxml.sourceforge.net/">Tcl bindings</a></li><li><a href="http://bugzilla.gnome.org/buglist.cgi?product=libxml2">Bug Tracker</a></li></ul></td></tr></table></td></tr></table></td><td valign="top" bgcolor="#8b7765"><table border="0" cellspacing="0" cellpadding="1" width="100%"><tr><td><table border="0" cellspacing="0" cellpadding="1" width="100%" bgcolor="#000000"><tr><td><table border="0" cellpadding="3" cellspacing="1" width="100%"><tr><td bgcolor="#fffacd"><table class="navigation" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2"><tr valign="middle"><td><a accesskey="p" href="libxml-xmlreader.html"><img src="left.png" width="24" height="24" border="0" alt="Prev" /></a></td><th align="left"><a href="libxml-xmlreader.html">xmlreader</a></th><td><a accesskey="u" href="index.html"><img src="up.png" width="24" height="24" border="0" alt="Up" /></a></td><th align="left"><a 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-xmlsave.html">xmlsave</a></th><td><a accesskey="n" href="libxml-xmlsave.html"><img src="right.png" width="24" height="24" border="0" alt="Next" /></a></td></tr></table><p>basic API for libxml regular expressions handling used for XML Schemas and validation. </p><h2>Table of Contents</h2><pre class="programlisting">Structure <a href="#xmlRegExecCtxt">xmlRegExecCtxt</a><br />struct _xmlRegExecCtxt
  14 The content of this structure is not made public by the API.
  15 </pre><pre class="programlisting">Typedef <a href="libxml-xmlregexp.html#xmlRegExecCtxt">xmlRegExecCtxt</a> * <a name="xmlRegExecCtxtPtr" id="xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a>
  16 </pre><pre class="programlisting">Structure <a href="#xmlRegexp">xmlRegexp</a><br />struct _xmlRegexp
  17 The content of this structure is not made public by the API.
  18 </pre><pre class="programlisting">Typedef <a href="libxml-xmlregexp.html#xmlRegexp">xmlRegexp</a> * <a name="xmlRegexpPtr" id="xmlRegexpPtr">xmlRegexpPtr</a>
  19 </pre><pre class="programlisting">Function type: <a href="#xmlRegExecCallbacks">xmlRegExecCallbacks</a>
  20 void    <a href="#xmlRegExecCallbacks">xmlRegExecCallbacks</a>          (<a href="libxml-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec, <br />                                    const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * token, <br />                                       void * transdata, <br />                                        void * inputdata)
  21 </pre>
  22 <pre class="programlisting">int <a href="#xmlRegExecErrInfo">xmlRegExecErrInfo</a>              (<a href="libxml-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec, <br />                                    const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> ** string, <br />                                     int * nbval, <br />                                     int * nbneg, <br />                                     <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> ** values, <br />                                   int * terminal)</pre>
  23 <pre class="programlisting">int <a href="#xmlRegExecNextValues">xmlRegExecNextValues</a>                (<a href="libxml-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec, <br />                                    int * nbval, <br />                                     int * nbneg, <br />                                     <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> ** values, <br />                                   int * terminal)</pre>
  24 <pre class="programlisting">int <a href="#xmlRegExecPushString">xmlRegExecPushString</a>                (<a href="libxml-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec, <br />                                    const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * value, <br />                                       void * data)</pre>
  25 <pre class="programlisting">int <a href="#xmlRegExecPushString2">xmlRegExecPushString2</a>              (<a href="libxml-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec, <br />                                    const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * value, <br />                                       const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * value2, <br />                                      void * data)</pre>
  26 <pre class="programlisting">void        <a href="#xmlRegFreeExecCtxt">xmlRegFreeExecCtxt</a>            (<a href="libxml-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec)</pre>
  27 <pre class="programlisting">void        <a href="#xmlRegFreeRegexp">xmlRegFreeRegexp</a>                (<a href="libxml-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> regexp)</pre>
  28 <pre class="programlisting"><a href="libxml-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a>     <a href="#xmlRegNewExecCtxt">xmlRegNewExecCtxt</a>      (<a href="libxml-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> comp, <br />                                              <a href="libxml-xmlregexp.html#xmlRegExecCallbacks">xmlRegExecCallbacks</a> callback, <br />                                            void * data)</pre>
  29 <pre class="programlisting"><a href="libxml-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a>       <a href="#xmlRegexpCompile">xmlRegexpCompile</a>        (const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * regexp)</pre>
  30 <pre class="programlisting">int <a href="#xmlRegexpExec">xmlRegexpExec</a>                      (<a href="libxml-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> comp, <br />                                      const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * content)</pre>
  31 <pre class="programlisting">int <a href="#xmlRegexpIsDeterminist">xmlRegexpIsDeterminist</a>            (<a href="libxml-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> comp)</pre>
  32 <pre class="programlisting">void        <a href="#xmlRegexpPrint">xmlRegexpPrint</a>                    (FILE * output, <br />                                   <a href="libxml-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> regexp)</pre>
  33 <h2>Description</h2>
  34 <h3><a name="xmlRegExecCtxt" id="xmlRegExecCtxt">Structure xmlRegExecCtxt</a></h3><pre class="programlisting">Structure xmlRegExecCtxt<br />struct _xmlRegExecCtxt {
  35 The content of this structure is not made public by the API.
  36 }</pre><h3><a name="xmlRegexp" id="xmlRegexp">Structure xmlRegexp</a></h3><pre class="programlisting">Structure xmlRegexp<br />struct _xmlRegexp {
  37 The content of this structure is not made public by the API.
  38 }</pre><h3><a name="xmlRegExecCallbacks" id="xmlRegExecCallbacks"></a>Function type: xmlRegExecCallbacks</h3><pre class="programlisting">Function type: xmlRegExecCallbacks
  39 void    xmlRegExecCallbacks             (<a href="libxml-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec, <br />                                    const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * token, <br />                                       void * transdata, <br />                                        void * inputdata)
  40 </pre><p></p><div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>exec</tt></i>:</span></td><td></td></tr><tr><td><span class="term"><i><tt>token</tt></i>:</span></td><td></td></tr><tr><td><span class="term"><i><tt>transdata</tt></i>:</span></td><td></td></tr><tr><td><span class="term"><i><tt>inputdata</tt></i>:</span></td><td></td></tr></tbody></table></div><br />
  41 <h3><a name="xmlRegExecErrInfo" id="xmlRegExecErrInfo"></a>Function: xmlRegExecErrInfo</h3><pre class="programlisting">int      xmlRegExecErrInfo               (<a href="libxml-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec, <br />                                    const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> ** string, <br />                                     int * nbval, <br />                                     int * nbneg, <br />                                     <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> ** values, <br />                                   int * terminal)<br />
  42 </pre><p>Extract error informations from the regexp execution, the parameter @string will be updated with the value pushed and not accepted, the parameter @values must point to an array of @nbval string pointers on return nbval will contain the number of possible strings in that state and the @values array will be updated with them. The string values</p>
  43 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>exec</tt></i>:</span></td><td>a regexp execution context generating an error</td></tr><tr><td><span class="term"><i><tt>string</tt></i>:</span></td><td>return value for the error string</td></tr><tr><td><span class="term"><i><tt>nbval</tt></i>:</span></td><td>pointer to the number of accepted values IN/OUT</td></tr><tr><td><span class="term"><i><tt>nbneg</tt></i>:</span></td><td>return number of negative transitions</td></tr><tr><td><span class="term"><i><tt>values</tt></i>:</span></td><td>pointer to the array of acceptable values</td></tr><tr><td><span class="term"><i><tt>terminal</tt></i>:</span></td><td>return value if this was a terminal state</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>will be freed with the @exec context and don't need to be deallocated. Returns: 0 in case of success or -1 in case of error.</td></tr></tbody></table></div><h3><a name="xmlRegExecNextValues" id="xmlRegExecNextValues"></a>Function: xmlRegExecNextValues</h3><pre class="programlisting">int    xmlRegExecNextValues            (<a href="libxml-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec, <br />                                    int * nbval, <br />                                     int * nbneg, <br />                                     <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> ** values, <br />                                   int * terminal)<br />
  44 </pre><p>Extract informations from the regexp execution, the parameter @values must point to an array of @nbval string pointers on return nbval will contain the number of possible strings in that state and the @values array will be updated with them. The string values</p>
  45 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>exec</tt></i>:</span></td><td>a regexp execution context</td></tr><tr><td><span class="term"><i><tt>nbval</tt></i>:</span></td><td>pointer to the number of accepted values IN/OUT</td></tr><tr><td><span class="term"><i><tt>nbneg</tt></i>:</span></td><td>return number of negative transitions</td></tr><tr><td><span class="term"><i><tt>values</tt></i>:</span></td><td>pointer to the array of acceptable values</td></tr><tr><td><span class="term"><i><tt>terminal</tt></i>:</span></td><td>return value if this was a terminal state</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>will be freed with the @exec context and don't need to be deallocated. Returns: 0 in case of success or -1 in case of error.</td></tr></tbody></table></div><h3><a name="xmlRegExecPushString" id="xmlRegExecPushString"></a>Function: xmlRegExecPushString</h3><pre class="programlisting">int     xmlRegExecPushString            (<a href="libxml-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec, <br />                                    const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * value, <br />                                       void * data)<br />
  46 </pre><p>Push one input token in the execution context</p>
  47 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>exec</tt></i>:</span></td><td>a regexp execution context or NULL to indicate the end</td></tr><tr><td><span class="term"><i><tt>value</tt></i>:</span></td><td>a string token input</td></tr><tr><td><span class="term"><i><tt>data</tt></i>:</span></td><td>data associated to the token to reuse in callbacks</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>1 if the regexp reached a final state, 0 if non-final, and a negative value in case of error.</td></tr></tbody></table></div><h3><a name="xmlRegExecPushString2" id="xmlRegExecPushString2"></a>Function: xmlRegExecPushString2</h3><pre class="programlisting">int        xmlRegExecPushString2           (<a href="libxml-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec, <br />                                    const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * value, <br />                                       const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * value2, <br />                                      void * data)<br />
  48 </pre><p>Push one input token in the execution context</p>
  49 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>exec</tt></i>:</span></td><td>a regexp execution context or NULL to indicate the end</td></tr><tr><td><span class="term"><i><tt>value</tt></i>:</span></td><td>the first string token input</td></tr><tr><td><span class="term"><i><tt>value2</tt></i>:</span></td><td>the second string token input</td></tr><tr><td><span class="term"><i><tt>data</tt></i>:</span></td><td>data associated to the token to reuse in callbacks</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>1 if the regexp reached a final state, 0 if non-final, and a negative value in case of error.</td></tr></tbody></table></div><h3><a name="xmlRegFreeExecCtxt" id="xmlRegFreeExecCtxt"></a>Function: xmlRegFreeExecCtxt</h3><pre class="programlisting">void       xmlRegFreeExecCtxt              (<a href="libxml-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec)<br />
  50 </pre><p>Free the structures associated to a regular expression evaulation context.</p>
  51 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>exec</tt></i>:</span></td><td>a regular expression evaulation context</td></tr></tbody></table></div><h3><a name="xmlRegFreeRegexp" id="xmlRegFreeRegexp"></a>Function: xmlRegFreeRegexp</h3><pre class="programlisting">void  xmlRegFreeRegexp                (<a href="libxml-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> regexp)<br />
  52 </pre><p>Free a regexp</p>
  53 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>regexp</tt></i>:</span></td><td>the regexp</td></tr></tbody></table></div><h3><a name="xmlRegNewExecCtxt" id="xmlRegNewExecCtxt"></a>Function: xmlRegNewExecCtxt</h3><pre class="programlisting"><a href="libxml-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a>       xmlRegNewExecCtxt       (<a href="libxml-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> comp, <br />                                              <a href="libxml-xmlregexp.html#xmlRegExecCallbacks">xmlRegExecCallbacks</a> callback, <br />                                            void * data)<br />
  54 </pre><p>Build a context used for progressive evaluation of a regexp.</p>
  55 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>comp</tt></i>:</span></td><td>a precompiled regular expression</td></tr><tr><td><span class="term"><i><tt>callback</tt></i>:</span></td><td>a callback function used for handling progresses in the automata matching phase</td></tr><tr><td><span class="term"><i><tt>data</tt></i>:</span></td><td>the context data associated to the callback in this context</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the new context</td></tr></tbody></table></div><h3><a name="xmlRegexpCompile" id="xmlRegexpCompile"></a>Function: xmlRegexpCompile</h3><pre class="programlisting"><a href="libxml-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a>  xmlRegexpCompile        (const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * regexp)<br />
  56 </pre><p>Parses a regular expression conforming to XML Schemas Part 2 Datatype Appendix F and builds an automata suitable for testing strings against that regular expression</p>
  57 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>regexp</tt></i>:</span></td><td>a regular expression string</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the compiled expression or NULL in case of error</td></tr></tbody></table></div><h3><a name="xmlRegexpExec" id="xmlRegexpExec"></a>Function: xmlRegexpExec</h3><pre class="programlisting">int xmlRegexpExec                   (<a href="libxml-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> comp, <br />                                      const <a href="libxml-xmlstring.html#xmlChar">xmlChar</a> * content)<br />
  58 </pre><p>Check if the regular expression generates the value</p>
  59 <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 regular expression</td></tr><tr><td><span class="term"><i><tt>content</tt></i>:</span></td><td>the value to check against the regular expression</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>1 if it matches, 0 if not and a negative value in case of error</td></tr></tbody></table></div><h3><a name="xmlRegexpIsDeterminist" id="xmlRegexpIsDeterminist"></a>Function: xmlRegexpIsDeterminist</h3><pre class="programlisting">int       xmlRegexpIsDeterminist          (<a href="libxml-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> comp)<br />
  60 </pre><p>Check if the regular expression is determinist</p>
  61 <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 regular expression</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>1 if it yes, 0 if not and a negative value in case of error</td></tr></tbody></table></div><h3><a name="xmlRegexpPrint" id="xmlRegexpPrint"></a>Function: xmlRegexpPrint</h3><pre class="programlisting">void        xmlRegexpPrint                  (FILE * output, <br />                                   <a href="libxml-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> regexp)<br />
  62 </pre><p>Print the content of the compiled regular expression</p>
  63 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>output</tt></i>:</span></td><td>the file for the output debug</td></tr><tr><td><span class="term"><i><tt>regexp</tt></i>:</span></td><td>the compiled regexp</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>