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<title>xmlregexp: regular expressions handling</title>
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<h2><span class="refentrytitle">xmlregexp</span></h2>
<p>xmlregexp - regular expressions handling</p>
<p>basic API for libxml regular expressions handling used for XML Schemas and validation. </p>
<p>Author(s): Daniel Veillard </p>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<pre class="synopsis">typedef struct _xmlExpCtxt <a href="#xmlExpCtxt">xmlExpCtxt</a>;
typedef <a href="libxml2-xmlregexp.html#xmlExpCtxt">xmlExpCtxt</a> * <a href="#xmlExpCtxtPtr">xmlExpCtxtPtr</a>;
typedef struct _xmlExpNode <a href="#xmlExpNode">xmlExpNode</a>;
typedef <a href="libxml2-xmlregexp.html#xmlExpNode">xmlExpNode</a> * <a href="#xmlExpNodePtr">xmlExpNodePtr</a>;
typedef enum <a href="#xmlExpNodeType">xmlExpNodeType</a>;
typedef struct _xmlRegExecCtxt <a href="#xmlRegExecCtxt">xmlRegExecCtxt</a>;
typedef <a href="libxml2-xmlregexp.html#xmlRegExecCtxt">xmlRegExecCtxt</a> * <a href="#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a>;
typedef struct _xmlRegexp <a href="#xmlRegexp">xmlRegexp</a>;
typedef <a href="libxml2-xmlregexp.html#xmlRegexp">xmlRegexp</a> * <a href="#xmlRegexpPtr">xmlRegexpPtr</a>;
int <a href="#xmlExpCtxtNbCons">xmlExpCtxtNbCons</a> (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt);
int <a href="#xmlExpCtxtNbNodes">xmlExpCtxtNbNodes</a> (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt);
void <a href="#xmlExpDump">xmlExpDump</a> (<a href="libxml2-tree.html#xmlBufferPtr">xmlBufferPtr</a> buf, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> expr);
<a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> <a href="#xmlExpExpDerive">xmlExpExpDerive</a> (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> sub);
void <a href="#xmlExpFree">xmlExpFree</a> (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp);
void <a href="#xmlExpFreeCtxt">xmlExpFreeCtxt</a> (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt);
int <a href="#xmlExpGetLanguage">xmlExpGetLanguage</a> (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp, <br> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** langList, <br> int len);
int <a href="#xmlExpGetStart">xmlExpGetStart</a> (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp, <br> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** tokList, <br> int len);
int <a href="#xmlExpIsNillable">xmlExpIsNillable</a> (<a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp);
int <a href="#xmlExpMaxToken">xmlExpMaxToken</a> (<a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> expr);
<a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> <a href="#xmlExpNewAtom">xmlExpNewAtom</a> (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br> int len);
<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> <a href="#xmlExpNewCtxt">xmlExpNewCtxt</a> (int maxNodes, <br> <a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict);
<a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> <a href="#xmlExpNewOr">xmlExpNewOr</a> (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> left, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> right);
<a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> <a href="#xmlExpNewRange">xmlExpNewRange</a> (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> subset, <br> int min, <br> int max);
<a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> <a href="#xmlExpNewSeq">xmlExpNewSeq</a> (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> left, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> right);
<a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> <a href="#xmlExpParse">xmlExpParse</a> (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> const char * expr);
void <a href="#xmlExpRef">xmlExpRef</a> (<a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp);
<a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> <a href="#xmlExpStringDerive">xmlExpStringDerive</a> (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp, <br> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * str, <br> int len);
int <a href="#xmlExpSubsume">xmlExpSubsume</a> (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> sub);
typedef void <a href="#xmlRegExecCallbacks">xmlRegExecCallbacks</a> (<a href="libxml2-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec, <br> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * token, <br> void * transdata, <br> void * inputdata);
int <a href="#xmlRegExecErrInfo">xmlRegExecErrInfo</a> (<a href="libxml2-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec, <br> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** string, <br> int * nbval, <br> int * nbneg, <br> <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** values, <br> int * terminal);
int <a href="#xmlRegExecNextValues">xmlRegExecNextValues</a> (<a href="libxml2-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec, <br> int * nbval, <br> int * nbneg, <br> <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** values, <br> int * terminal);
int <a href="#xmlRegExecPushString">xmlRegExecPushString</a> (<a href="libxml2-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec, <br> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * value, <br> void * data);
int <a href="#xmlRegExecPushString2">xmlRegExecPushString2</a> (<a href="libxml2-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec, <br> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * value, <br> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * value2, <br> void * data);
void <a href="#xmlRegFreeExecCtxt">xmlRegFreeExecCtxt</a> (<a href="libxml2-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec);
void <a href="#xmlRegFreeRegexp">xmlRegFreeRegexp</a> (<a href="libxml2-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> regexp);
<a href="libxml2-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> <a href="#xmlRegNewExecCtxt">xmlRegNewExecCtxt</a> (<a href="libxml2-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> comp, <br> <a href="libxml2-xmlregexp.html#xmlRegExecCallbacks">xmlRegExecCallbacks</a> callback, <br> void * data);
<a href="libxml2-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> <a href="#xmlRegexpCompile">xmlRegexpCompile</a> (const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * regexp);
int <a href="#xmlRegexpExec">xmlRegexpExec</a> (<a href="libxml2-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> comp, <br> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * content);
int <a href="#xmlRegexpIsDeterminist">xmlRegexpIsDeterminist</a> (<a href="libxml2-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> comp);
void <a href="#xmlRegexpPrint">xmlRegexpPrint</a> (FILE * output, <br> <a href="libxml2-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> regexp);
</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="xmlExpCtxt">Structure </a>xmlExpCtxt</h3>
<pre class="programlisting">struct _xmlExpCtxt {
The content of this structure is not made public by the API.
} xmlExpCtxt;
</pre>
<p></p>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpCtxtPtr">Typedef </a>xmlExpCtxtPtr</h3>
<pre class="programlisting"><a href="libxml2-xmlregexp.html#xmlExpCtxt">xmlExpCtxt</a> * xmlExpCtxtPtr;
</pre>
<p></p>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpNode">Structure </a>xmlExpNode</h3>
<pre class="programlisting">struct _xmlExpNode {
The content of this structure is not made public by the API.
} xmlExpNode;
</pre>
<p></p>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpNodePtr">Typedef </a>xmlExpNodePtr</h3>
<pre class="programlisting"><a href="libxml2-xmlregexp.html#xmlExpNode">xmlExpNode</a> * xmlExpNodePtr;
</pre>
<p></p>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpNodeType">Enum </a>xmlExpNodeType</h3>
<pre class="programlisting">enum <a href="#xmlExpNodeType">xmlExpNodeType</a> {
<a name="XML_EXP_EMPTY">XML_EXP_EMPTY</a> = 0
<a name="XML_EXP_FORBID">XML_EXP_FORBID</a> = 1
<a name="XML_EXP_ATOM">XML_EXP_ATOM</a> = 2
<a name="XML_EXP_SEQ">XML_EXP_SEQ</a> = 3
<a name="XML_EXP_OR">XML_EXP_OR</a> = 4
<a name="XML_EXP_COUNT">XML_EXP_COUNT</a> = 5
};
</pre>
<p></p>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlRegExecCtxt">Structure </a>xmlRegExecCtxt</h3>
<pre class="programlisting">struct _xmlRegExecCtxt {
The content of this structure is not made public by the API.
} xmlRegExecCtxt;
</pre>
<p></p>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlRegExecCtxtPtr">Typedef </a>xmlRegExecCtxtPtr</h3>
<pre class="programlisting"><a href="libxml2-xmlregexp.html#xmlRegExecCtxt">xmlRegExecCtxt</a> * xmlRegExecCtxtPtr;
</pre>
<p>A libxml progressive regular expression evaluation context</p>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlRegexp">Structure </a>xmlRegexp</h3>
<pre class="programlisting">struct _xmlRegexp {
The content of this structure is not made public by the API.
} xmlRegexp;
</pre>
<p></p>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlRegexpPtr">Typedef </a>xmlRegexpPtr</h3>
<pre class="programlisting"><a href="libxml2-xmlregexp.html#xmlRegexp">xmlRegexp</a> * xmlRegexpPtr;
</pre>
<p>A libxml regular expression, they can actually be far more complex thank the POSIX regex expressions.</p>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlRegExecCallbacks"></a>Function type xmlRegExecCallbacks</h3>
<pre class="programlisting">void xmlRegExecCallbacks (<a href="libxml2-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec, <br> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * token, <br> void * transdata, <br> void * inputdata)<br>
</pre>
<p>Callback function when doing a transition in the automata</p>
<div class="variablelist"><table border="0">
<col align="left">
<tbody>
<tr>
<td><span class="term"><i><tt>exec</tt></i>:</span></td>
<td>the regular expression context</td>
</tr>
<tr>
<td><span class="term"><i><tt>token</tt></i>:</span></td>
<td>the current token string</td>
</tr>
<tr>
<td><span class="term"><i><tt>transdata</tt></i>:</span></td>
<td>transition data</td>
</tr>
<tr>
<td><span class="term"><i><tt>inputdata</tt></i>:</span></td>
<td>input data</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="emptyExp">Variable </a>emptyExp</h3>
<pre class="programlisting"><a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> emptyExp;
</pre>
<p></p>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="forbiddenExp">Variable </a>forbiddenExp</h3>
<pre class="programlisting"><a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> forbiddenExp;
</pre>
<p></p>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpCtxtNbCons"></a>xmlExpCtxtNbCons ()</h3>
<pre class="programlisting">int xmlExpCtxtNbCons (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt)<br>
</pre>
<p>Debugging facility provides the number of allocated nodes over lifetime</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 expression context</td>
</tr>
<tr>
<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
<td>the number of nodes ever allocated or -1 in case of error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpCtxtNbNodes"></a>xmlExpCtxtNbNodes ()</h3>
<pre class="programlisting">int xmlExpCtxtNbNodes (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt)<br>
</pre>
<p>Debugging facility provides the number of allocated nodes at a that point</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 expression context</td>
</tr>
<tr>
<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
<td>the number of nodes in use or -1 in case of error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpDump"></a>xmlExpDump ()</h3>
<pre class="programlisting">void xmlExpDump (<a href="libxml2-tree.html#xmlBufferPtr">xmlBufferPtr</a> buf, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> expr)<br>
</pre>
<p>Serialize the expression as compiled to the buffer</p>
<div class="variablelist"><table border="0">
<col align="left">
<tbody>
<tr>
<td><span class="term"><i><tt>buf</tt></i>:</span></td>
<td>a buffer to receive the output</td>
</tr>
<tr>
<td><span class="term"><i><tt>expr</tt></i>:</span></td>
<td>the compiled expression</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpExpDerive"></a>xmlExpExpDerive ()</h3>
<pre class="programlisting"><a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> xmlExpExpDerive (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> sub)<br>
</pre>
<p>Evaluates the expression resulting from @exp consuming a sub expression @sub Based on algebraic derivation and sometimes direct Brzozowski derivation it usually takes less than linear time and can handle expressions generating infinite languages.</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 expressions context</td>
</tr>
<tr>
<td><span class="term"><i><tt>exp</tt></i>:</span></td>
<td>the englobing expression</td>
</tr>
<tr>
<td><span class="term"><i><tt>sub</tt></i>:</span></td>
<td>the subexpression</td>
</tr>
<tr>
<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
<td>the resulting expression or NULL in case of internal error, the result must be freed</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpFree"></a>xmlExpFree ()</h3>
<pre class="programlisting">void xmlExpFree (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp)<br>
</pre>
<p>Dereference the expression</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 expression context</td>
</tr>
<tr>
<td><span class="term"><i><tt>exp</tt></i>:</span></td>
<td>the expression</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpFreeCtxt"></a>xmlExpFreeCtxt ()</h3>
<pre class="programlisting">void xmlExpFreeCtxt (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt)<br>
</pre>
<p>Free an expression context</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 expression context</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpGetLanguage"></a>xmlExpGetLanguage ()</h3>
<pre class="programlisting">int xmlExpGetLanguage (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp, <br> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** langList, <br> int len)<br>
</pre>
<p>Find all the strings used in @exp and store them in @list</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 expression context</td>
</tr>
<tr>
<td><span class="term"><i><tt>exp</tt></i>:</span></td>
<td>the expression</td>
</tr>
<tr>
<td><span class="term"><i><tt>langList</tt></i>:</span></td>
<td>where to store the tokens</td>
</tr>
<tr>
<td><span class="term"><i><tt>len</tt></i>:</span></td>
<td>the allocated length of @list</td>
</tr>
<tr>
<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
<td>the number of unique strings found, -1 in case of errors and -2 if there is more than @len strings</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpGetStart"></a>xmlExpGetStart ()</h3>
<pre class="programlisting">int xmlExpGetStart (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp, <br> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** tokList, <br> int len)<br>
</pre>
<p>Find all the strings that appears at the start of the languages accepted by @exp and store them in @list. E.g. for (a, b) | c it will return the list [a, c]</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 expression context</td>
</tr>
<tr>
<td><span class="term"><i><tt>exp</tt></i>:</span></td>
<td>the expression</td>
</tr>
<tr>
<td><span class="term"><i><tt>tokList</tt></i>:</span></td>
<td>where to store the tokens</td>
</tr>
<tr>
<td><span class="term"><i><tt>len</tt></i>:</span></td>
<td>the allocated length of @list</td>
</tr>
<tr>
<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
<td>the number of unique strings found, -1 in case of errors and -2 if there is more than @len strings</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpIsNillable"></a>xmlExpIsNillable ()</h3>
<pre class="programlisting">int xmlExpIsNillable (<a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp)<br>
</pre>
<p>Finds if the expression is nillable, i.e. if it accepts the empty sequence</p>
<div class="variablelist"><table border="0">
<col align="left">
<tbody>
<tr>
<td><span class="term"><i><tt>exp</tt></i>:</span></td>
<td>the expression</td>
</tr>
<tr>
<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
<td>1 if nillable, 0 if not and -1 in case of error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpMaxToken"></a>xmlExpMaxToken ()</h3>
<pre class="programlisting">int xmlExpMaxToken (<a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> expr)<br>
</pre>
<p>Indicate the maximum number of input a expression can accept</p>
<div class="variablelist"><table border="0">
<col align="left">
<tbody>
<tr>
<td><span class="term"><i><tt>expr</tt></i>:</span></td>
<td>a compiled expression</td>
</tr>
<tr>
<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
<td>the maximum length or -1 in case of error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpNewAtom"></a>xmlExpNewAtom ()</h3>
<pre class="programlisting"><a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> xmlExpNewAtom (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * name, <br> int len)<br>
</pre>
<p>Get the atom associated to this name from that context</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 expression context</td>
</tr>
<tr>
<td><span class="term"><i><tt>name</tt></i>:</span></td>
<td>the atom name</td>
</tr>
<tr>
<td><span class="term"><i><tt>len</tt></i>:</span></td>
<td>the atom name length in byte (or -1);</td>
</tr>
<tr>
<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
<td>the node or NULL in case of error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpNewCtxt"></a>xmlExpNewCtxt ()</h3>
<pre class="programlisting"><a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> xmlExpNewCtxt (int maxNodes, <br> <a href="libxml2-dict.html#xmlDictPtr">xmlDictPtr</a> dict)<br>
</pre>
<p>Creates a new context for manipulating expressions</p>
<div class="variablelist"><table border="0">
<col align="left">
<tbody>
<tr>
<td><span class="term"><i><tt>maxNodes</tt></i>:</span></td>
<td>the maximum number of nodes</td>
</tr>
<tr>
<td><span class="term"><i><tt>dict</tt></i>:</span></td>
<td>optional dictionary to use internally</td>
</tr>
<tr>
<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
<td>the context or NULL in case of error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpNewOr"></a>xmlExpNewOr ()</h3>
<pre class="programlisting"><a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> xmlExpNewOr (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> left, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> right)<br>
</pre>
<p>Get the atom associated to the choice @left | @right Note that @left and @right are consumed in the operation, to keep an handle on them use xmlExpRef() and use xmlExpFree() to release them, this is true even in case of failure (unless ctxt == NULL).</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 expression context</td>
</tr>
<tr>
<td><span class="term"><i><tt>left</tt></i>:</span></td>
<td>left expression</td>
</tr>
<tr>
<td><span class="term"><i><tt>right</tt></i>:</span></td>
<td>right expression</td>
</tr>
<tr>
<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
<td>the node or NULL in case of error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpNewRange"></a>xmlExpNewRange ()</h3>
<pre class="programlisting"><a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> xmlExpNewRange (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> subset, <br> int min, <br> int max)<br>
</pre>
<p>Get the atom associated to the range (@subset){@min, @max} Note that @subset is consumed in the operation, to keep an handle on it use xmlExpRef() and use xmlExpFree() to release it, this is true even in case of failure (unless ctxt == NULL).</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 expression context</td>
</tr>
<tr>
<td><span class="term"><i><tt>subset</tt></i>:</span></td>
<td>the expression to be repeated</td>
</tr>
<tr>
<td><span class="term"><i><tt>min</tt></i>:</span></td>
<td>the lower bound for the repetition</td>
</tr>
<tr>
<td><span class="term"><i><tt>max</tt></i>:</span></td>
<td>the upper bound for the repetition, -1 means infinite</td>
</tr>
<tr>
<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
<td>the node or NULL in case of error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpNewSeq"></a>xmlExpNewSeq ()</h3>
<pre class="programlisting"><a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> xmlExpNewSeq (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> left, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> right)<br>
</pre>
<p>Get the atom associated to the sequence @left , @right Note that @left and @right are consumed in the operation, to keep an handle on them use xmlExpRef() and use xmlExpFree() to release them, this is true even in case of failure (unless ctxt == NULL).</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 expression context</td>
</tr>
<tr>
<td><span class="term"><i><tt>left</tt></i>:</span></td>
<td>left expression</td>
</tr>
<tr>
<td><span class="term"><i><tt>right</tt></i>:</span></td>
<td>right expression</td>
</tr>
<tr>
<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
<td>the node or NULL in case of error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpParse"></a>xmlExpParse ()</h3>
<pre class="programlisting"><a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> xmlExpParse (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> const char * expr)<br>
</pre>
<p>Minimal parser for regexps, it understand the following constructs - string terminals - choice operator | - sequence operator , - subexpressions (...) - usual cardinality operators + * and ? - finite sequences { min, max } - infinite sequences { min, * } There is minimal checkings made especially no checking on strings values</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 expressions context</td>
</tr>
<tr>
<td><span class="term"><i><tt>expr</tt></i>:</span></td>
<td>the 0 terminated string</td>
</tr>
<tr>
<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
<td>a new expression or NULL in case of failure</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpRef"></a>xmlExpRef ()</h3>
<pre class="programlisting">void xmlExpRef (<a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp)<br>
</pre>
<p>Increase the <a href="libxml2-SAX.html#reference">reference</a> count of the expression</p>
<div class="variablelist"><table border="0">
<col align="left">
<tbody><tr>
<td><span class="term"><i><tt>exp</tt></i>:</span></td>
<td>the expression</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpStringDerive"></a>xmlExpStringDerive ()</h3>
<pre class="programlisting"><a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> xmlExpStringDerive (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp, <br> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * str, <br> int len)<br>
</pre>
<p>Do one step of Brzozowski derivation of the expression @exp with respect to the input string</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 expression context</td>
</tr>
<tr>
<td><span class="term"><i><tt>exp</tt></i>:</span></td>
<td>the expression</td>
</tr>
<tr>
<td><span class="term"><i><tt>str</tt></i>:</span></td>
<td>the string</td>
</tr>
<tr>
<td><span class="term"><i><tt>len</tt></i>:</span></td>
<td>the string len in bytes if available</td>
</tr>
<tr>
<td><span class="term"><i><tt>Returns</tt></i>:</span></td>
<td>the resulting expression or NULL in case of internal error</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlExpSubsume"></a>xmlExpSubsume ()</h3>
<pre class="programlisting">int xmlExpSubsume (<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp, <br> <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> sub)<br>
</pre>
<p>Check whether @exp accepts all the languages accepted by @sub the input being a subexpression.</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 expressions context</td>
</tr>
<tr>
<td><span class="term"><i><tt>exp</tt></i>:</span></td>
<td>the englobing expression</td>
</tr>
<tr>
<td><span class="term"><i><tt>sub</tt></i>:</span></td>
<td>the subexpression</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 failure.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlRegExecErrInfo"></a>xmlRegExecErrInfo ()</h3>
<pre class="programlisting">int xmlRegExecErrInfo (<a href="libxml2-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec, <br> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** string, <br> int * nbval, <br> int * nbneg, <br> <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** values, <br> int * terminal)<br>
</pre>
<p>Extract error information 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>
<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>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlRegExecNextValues"></a>xmlRegExecNextValues ()</h3>
<pre class="programlisting">int xmlRegExecNextValues (<a href="libxml2-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec, <br> int * nbval, <br> int * nbneg, <br> <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** values, <br> int * terminal)<br>
</pre>
<p>Extract information 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>
<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>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlRegExecPushString"></a>xmlRegExecPushString ()</h3>
<pre class="programlisting">int xmlRegExecPushString (<a href="libxml2-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec, <br> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * value, <br> void * data)<br>
</pre>
<p>Push one input token in the execution context</p>
<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>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlRegExecPushString2"></a>xmlRegExecPushString2 ()</h3>
<pre class="programlisting">int xmlRegExecPushString2 (<a href="libxml2-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec, <br> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * value, <br> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * value2, <br> void * data)<br>
</pre>
<p>Push one input token in the execution context</p>
<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>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlRegFreeExecCtxt"></a>xmlRegFreeExecCtxt ()</h3>
<pre class="programlisting">void xmlRegFreeExecCtxt (<a href="libxml2-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec)<br>
</pre>
<p>Free the structures associated to a regular expression evaluation context.</p>
<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 evaluation context</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlRegFreeRegexp"></a>xmlRegFreeRegexp ()</h3>
<pre class="programlisting">void xmlRegFreeRegexp (<a href="libxml2-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> regexp)<br>
</pre>
<p>Free a regexp</p>
<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>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlRegNewExecCtxt"></a>xmlRegNewExecCtxt ()</h3>
<pre class="programlisting"><a href="libxml2-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> xmlRegNewExecCtxt (<a href="libxml2-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> comp, <br> <a href="libxml2-xmlregexp.html#xmlRegExecCallbacks">xmlRegExecCallbacks</a> callback, <br> void * data)<br>
</pre>
<p>Build a context used for progressive evaluation of a regexp.</p>
<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>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlRegexpCompile"></a>xmlRegexpCompile ()</h3>
<pre class="programlisting"><a href="libxml2-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> xmlRegexpCompile (const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * regexp)<br>
</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>
<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>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlRegexpExec"></a>xmlRegexpExec ()</h3>
<pre class="programlisting">int xmlRegexpExec (<a href="libxml2-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> comp, <br> const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * content)<br>
</pre>
<p>Check if the regular expression generates the value</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 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>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlRegexpIsDeterminist"></a>xmlRegexpIsDeterminist ()</h3>
<pre class="programlisting">int xmlRegexpIsDeterminist (<a href="libxml2-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> comp)<br>
</pre>
<p>Check if the regular expression is determinist</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 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>
</div>
<hr>
<div class="refsect2" lang="en">
<h3>
<a name="xmlRegexpPrint"></a>xmlRegexpPrint ()</h3>
<pre class="programlisting">void xmlRegexpPrint (FILE * output, <br> <a href="libxml2-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> regexp)<br>
</pre>
<p>Print the content of the compiled regular expression</p>
<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>
</div>
<hr>
</div>
</div>
</body>
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