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libxml2-xmlregexp.html 41 KB
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  38.     <h2>
    39. 

  39.       <span class="refentrytitle">xmlregexp</span>
    40. 

  40.     </h2>
    41. 

  41.     <p>xmlregexp - regular expressions handling</p>
    42. 

  42.     <p>basic API for libxml regular expressions handling used for XML Schemas and validation. </p>
    43. 

  43.     <p>Author(s): Daniel Veillard </p>
    44. 

  44.     <div class="refsynopsisdiv">
    45. 

  45.       <h2>Synopsis</h2>
    46. 

  46.       <pre class="synopsis">typedef <a href="libxml2-xmlregexp.html#xmlRegExecCtxt">xmlRegExecCtxt</a> * <a href="#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a>;
    47. 

  47. typedef struct _xmlExpCtxt <a href="#xmlExpCtxt">xmlExpCtxt</a>;
    48. 

  48. typedef <a href="libxml2-xmlregexp.html#xmlExpNode">xmlExpNode</a> * <a href="#xmlExpNodePtr">xmlExpNodePtr</a>;
    49. 

  49. typedef <a href="libxml2-xmlregexp.html#xmlExpCtxt">xmlExpCtxt</a> * <a href="#xmlExpCtxtPtr">xmlExpCtxtPtr</a>;
    50. 

  50. typedef enum <a href="#xmlExpNodeType">xmlExpNodeType</a>;
    51. 

  51. typedef struct _xmlRegExecCtxt <a href="#xmlRegExecCtxt">xmlRegExecCtxt</a>;
    52. 

  52. typedef struct _xmlExpNode <a href="#xmlExpNode">xmlExpNode</a>;
    53. 

  53. typedef struct _xmlRegexp <a href="#xmlRegexp">xmlRegexp</a>;
    54. 

  54. typedef <a href="libxml2-xmlregexp.html#xmlRegexp">xmlRegexp</a> * <a href="#xmlRegexpPtr">xmlRegexpPtr</a>;
    55. 

  55. 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);
    56. 

  56. <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);
    57. 

  57. <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);
    58. 

  58. void	<a href="#xmlRegFreeRegexp">xmlRegFreeRegexp</a>		(<a href="libxml2-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> regexp);
    59. 

  59. void	<a href="#xmlExpRef">xmlExpRef</a>			(<a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp);
    60. 

  60. int	<a href="#xmlRegexpIsDeterminist">xmlRegexpIsDeterminist</a>		(<a href="libxml2-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> comp);
    61. 

  61. 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);
    62. 

  62. void	<a href="#xmlRegFreeExecCtxt">xmlRegFreeExecCtxt</a>		(<a href="libxml2-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec);
    63. 

  63. int	<a href="#xmlExpCtxtNbCons">xmlExpCtxtNbCons</a>		(<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt);
    64. 

  64. 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);
    65. 

  65. 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);
    66. 

  66. 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);
    67. 

  67. <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);
    68. 

  68. int	<a href="#xmlExpIsNillable">xmlExpIsNillable</a>		(<a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp);
    69. 

  69. void	<a href="#xmlExpFreeCtxt">xmlExpFreeCtxt</a>			(<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt);
    70. 

  70. 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);
    71. 

  71. <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);
    72. 

  72. 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);
    73. 

  73. <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);
    74. 

  74. <a href="libxml2-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a>	<a href="#xmlRegexpCompile">xmlRegexpCompile</a>	(const <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> * regexp);
    75. 

  75. <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);
    76. 

  76. 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);
    77. 

  77. 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);
    78. 

  78. 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);
    79. 

  79. <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);
    80. 

  80. <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);
    81. 

  81. 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);
    82. 

  82. <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);
    83. 

  83. int	<a href="#xmlExpCtxtNbNodes">xmlExpCtxtNbNodes</a>		(<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt);
    84. 

  84. int	<a href="#xmlExpMaxToken">xmlExpMaxToken</a>			(<a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> expr);
    85. 

  85. void	<a href="#xmlRegexpPrint">xmlRegexpPrint</a>			(FILE * output, <br/>					 <a href="libxml2-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> regexp);
    86. 

  86. </pre>
    87. 

  87.     </div>
    88. 

  88.     <div class="refsect1" lang="en">
    89. 

  89.       <h2>Description</h2>
    90. 

  90.     </div>
    91. 

  91.     <div class="refsect1" lang="en">
    92. 

  92.       <h2>Details</h2>
    93. 

  93.       <div class="refsect2" lang="en">
    94. 

  94.         <div class="refsect2" lang="en"><h3><a name="xmlExpCtxt">Structure </a>xmlExpCtxt</h3><pre class="programlisting">struct _xmlExpCtxt {
    95. 

  95. The content of this structure is not made public by the API.
    96. 

  96. } xmlExpCtxt;
    97. 

  97. </pre><p/>
    98. 

  98. </div>
    99. 

  99.         <hr/>
    100. 

  100.         <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;
    101. 

  101. </pre><p/>
    102. 

  102. </div>
    103. 

  103.         <hr/>
    104. 

  104.         <div class="refsect2" lang="en"><h3><a name="xmlExpNode">Structure </a>xmlExpNode</h3><pre class="programlisting">struct _xmlExpNode {
    105. 

  105. The content of this structure is not made public by the API.
    106. 

  106. } xmlExpNode;
    107. 

  107. </pre><p/>
    108. 

  108. </div>
    109. 

  109.         <hr/>
    110. 

  110.         <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;
    111. 

  111. </pre><p/>
    112. 

  112. </div>
    113. 

  113.         <hr/>
    114. 

  114.         <div class="refsect2" lang="en"><h3><a name="xmlExpNodeType">Enum </a>xmlExpNodeType</h3><pre class="programlisting">enum <a href="#xmlExpNodeType">xmlExpNodeType</a> {
    115. 

  115.     <a name="XML_EXP_EMPTY">XML_EXP_EMPTY</a> = 0
    116. 

  116.     <a name="XML_EXP_FORBID">XML_EXP_FORBID</a> = 1
    117. 

  117.     <a name="XML_EXP_ATOM">XML_EXP_ATOM</a> = 2
    118. 

  118.     <a name="XML_EXP_SEQ">XML_EXP_SEQ</a> = 3
    119. 

  119.     <a name="XML_EXP_OR">XML_EXP_OR</a> = 4
    120. 

  120.     <a name="XML_EXP_COUNT">XML_EXP_COUNT</a> = 5
    121. 

  121. };
    122. 

  122. </pre><p/>
    123. 

  123. </div>
    124. 

  124.         <hr/>
    125. 

  125.         <div class="refsect2" lang="en"><h3><a name="xmlRegExecCtxt">Structure </a>xmlRegExecCtxt</h3><pre class="programlisting">struct _xmlRegExecCtxt {
    126. 

  126. The content of this structure is not made public by the API.
    127. 

  127. } xmlRegExecCtxt;
    128. 

  128. </pre><p/>
    129. 

  129. </div>
    130. 

  130.         <hr/>
    131. 

  131.         <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;
    132. 

  132. </pre><p>A libxml progressive regular expression evaluation context</p>
    133. 

  133. </div>
    134. 

  134.         <hr/>
    135. 

  135.         <div class="refsect2" lang="en"><h3><a name="xmlRegexp">Structure </a>xmlRegexp</h3><pre class="programlisting">struct _xmlRegexp {
    136. 

  136. The content of this structure is not made public by the API.
    137. 

  137. } xmlRegexp;
    138. 

  138. </pre><p/>
    139. 

  139. </div>
    140. 

  140.         <hr/>
    141. 

  141.         <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;
    142. 

  142. </pre><p>A libxml regular expression, they can actually be far more complex thank the POSIX regex expressions.</p>
    143. 

  143. </div>
    144. 

  144.         <hr/>
    145. 

  145.         <div class="refsect2" lang="en"><h3><a name="xmlRegExecCallbacks"/>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/>
    146. 

  146. </pre><p>Callback function when doing a transition in the automata</p>
    147. 

  147. <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>
    148. 

  148.         <hr/>
    149. 

  149.         <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;
    150. 

  150. </pre><p/>
    151. 

  151. </div>
    152. 

  152.         <hr/>
    153. 

  153.         <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;
    154. 

  154. </pre><p/>
    155. 

  155. </div>
    156. 

  156.         <hr/>
    157. 

  157.         <div class="refsect2" lang="en"><h3><a name="xmlExpCtxtNbCons"/>xmlExpCtxtNbCons ()</h3><pre class="programlisting">int	xmlExpCtxtNbCons		(<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt)<br/>
    158. 

  158. </pre><p>Debugging facility provides the number of allocated nodes over lifetime</p>
    159. 

  159. <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>
    160. 

  160.         <hr/>
    161. 

  161.         <div class="refsect2" lang="en"><h3><a name="xmlExpCtxtNbNodes"/>xmlExpCtxtNbNodes ()</h3><pre class="programlisting">int	xmlExpCtxtNbNodes		(<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt)<br/>
    162. 

  162. </pre><p>Debugging facility provides the number of allocated nodes at a that point</p>
    163. 

  163. <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>
    164. 

  164.         <hr/>
    165. 

  165.         <div class="refsect2" lang="en"><h3><a name="xmlExpDump"/>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/>
    166. 

  166. </pre><p>Serialize the expression as compiled to the buffer</p>
    167. 

  167. <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>
    168. 

  168.         <hr/>
    169. 

  169.         <div class="refsect2" lang="en"><h3><a name="xmlExpExpDerive"/>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/>
    170. 

  170. </pre><p>Evaluates the expression resulting from @exp consuming a sub expression @sub Based on algebraic derivation and sometimes direct Brzozowski derivation it usually tatkes less than linear time and can handle expressions generating infinite languages.</p>
    171. 

  171. <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>
    172. 

  172.         <hr/>
    173. 

  173.         <div class="refsect2" lang="en"><h3><a name="xmlExpFree"/>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/>
    174. 

  174. </pre><p>Dereference the expression</p>
    175. 

  175. <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>
    176. 

  176.         <hr/>
    177. 

  177.         <div class="refsect2" lang="en"><h3><a name="xmlExpFreeCtxt"/>xmlExpFreeCtxt ()</h3><pre class="programlisting">void	xmlExpFreeCtxt			(<a href="libxml2-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt)<br/>
    178. 

  178. </pre><p>Free an expression context</p>
    179. 

  179. <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>
    180. 

  180.         <hr/>
    181. 

  181.         <div class="refsect2" lang="en"><h3><a name="xmlExpGetLanguage"/>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/>
    182. 

  182. </pre><p>Find all the strings used in @exp and store them in @list</p>
    183. 

  183. <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 lenght 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>
    184. 

  184.         <hr/>
    185. 

  185.         <div class="refsect2" lang="en"><h3><a name="xmlExpGetStart"/>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/>
    186. 

  186. </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>
    187. 

  187. <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 lenght 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>
    188. 

  188.         <hr/>
    189. 

  189.         <div class="refsect2" lang="en"><h3><a name="xmlExpIsNillable"/>xmlExpIsNillable ()</h3><pre class="programlisting">int	xmlExpIsNillable		(<a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp)<br/>
    190. 

  190. </pre><p>Finds if the expression is nillable, i.e. if it accepts the empty sequqnce</p>
    191. 

  191. <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>
    192. 

  192.         <hr/>
    193. 

  193.         <div class="refsect2" lang="en"><h3><a name="xmlExpMaxToken"/>xmlExpMaxToken ()</h3><pre class="programlisting">int	xmlExpMaxToken			(<a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> expr)<br/>
    194. 

  194. </pre><p>Indicate the maximum number of input a expression can accept</p>
    195. 

  195. <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>
    196. 

  196.         <hr/>
    197. 

  197.         <div class="refsect2" lang="en"><h3><a name="xmlExpNewAtom"/>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/>
    198. 

  198. </pre><p>Get the atom associated to this name from that context</p>
    199. 

  199. <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 lenght 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>
    200. 

  200.         <hr/>
    201. 

  201.         <div class="refsect2" lang="en"><h3><a name="xmlExpNewCtxt"/>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/>
    202. 

  202. </pre><p>Creates a new context for manipulating expressions</p>
    203. 

  203. <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 dictionnary 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>
    204. 

  204.         <hr/>
    205. 

  205.         <div class="refsect2" lang="en"><h3><a name="xmlExpNewOr"/>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/>
    206. 

  206. </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>
    207. 

  207. <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>
    208. 

  208.         <hr/>
    209. 

  209.         <div class="refsect2" lang="en"><h3><a name="xmlExpNewRange"/>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/>
    210. 

  210. </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>
    211. 

  211. <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>
    212. 

  212.         <hr/>
    213. 

  213.         <div class="refsect2" lang="en"><h3><a name="xmlExpNewSeq"/>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/>
    214. 

  214. </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>
    215. 

  215. <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>
    216. 

  216.         <hr/>
    217. 

  217.         <div class="refsect2" lang="en"><h3><a name="xmlExpParse"/>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/>
    218. 

  218. </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>
    219. 

  219. <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>
    220. 

  220.         <hr/>
    221. 

  221.         <div class="refsect2" lang="en"><h3><a name="xmlExpRef"/>xmlExpRef ()</h3><pre class="programlisting">void	xmlExpRef			(<a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp)<br/>
    222. 

  222. </pre><p>Increase the <a href="libxml2-SAX.html#reference">reference</a> count of the expression</p>
    223. 

  223. <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>
    224. 

  224.         <hr/>
    225. 

  225.         <div class="refsect2" lang="en"><h3><a name="xmlExpStringDerive"/>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/>
    226. 

  226. </pre><p>Do one step of Brzozowski derivation of the expression @exp with respect to the input string</p>
    227. 

  227. <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>
    228. 

  228.         <hr/>
    229. 

  229.         <div class="refsect2" lang="en"><h3><a name="xmlExpSubsume"/>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/>
    230. 

  230. </pre><p>Check whether @exp accepts all the languages accexpted by @sub the input being a subexpression.</p>
    231. 

  231. <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>
    232. 

  232.         <hr/>
    233. 

  233.         <div class="refsect2" lang="en"><h3><a name="xmlRegExecErrInfo"/>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/>
    234. 

  234. </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>
    235. 

  235. <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>
    236. 

  236.         <hr/>
    237. 

  237.         <div class="refsect2" lang="en"><h3><a name="xmlRegExecNextValues"/>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/>
    238. 

  238. </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>
    239. 

  239. <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>
    240. 

  240.         <hr/>
    241. 

  241.         <div class="refsect2" lang="en"><h3><a name="xmlRegExecPushString"/>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/>
    242. 

  242. </pre><p>Push one input token in the execution context</p>
    243. 

  243. <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>
    244. 

  244.         <hr/>
    245. 

  245.         <div class="refsect2" lang="en"><h3><a name="xmlRegExecPushString2"/>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/>
    246. 

  246. </pre><p>Push one input token in the execution context</p>
    247. 

  247. <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>
    248. 

  248.         <hr/>
    249. 

  249.         <div class="refsect2" lang="en"><h3><a name="xmlRegFreeExecCtxt"/>xmlRegFreeExecCtxt ()</h3><pre class="programlisting">void	xmlRegFreeExecCtxt		(<a href="libxml2-xmlregexp.html#xmlRegExecCtxtPtr">xmlRegExecCtxtPtr</a> exec)<br/>
    250. 

  250. </pre><p>Free the structures associated to a regular expression evaulation context.</p>
    251. 

  251. <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></div>
    252. 

  252.         <hr/>
    253. 

  253.         <div class="refsect2" lang="en"><h3><a name="xmlRegFreeRegexp"/>xmlRegFreeRegexp ()</h3><pre class="programlisting">void	xmlRegFreeRegexp		(<a href="libxml2-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> regexp)<br/>
    254. 

  254. </pre><p>Free a regexp</p>
    255. 

  255. <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>
    256. 

  256.         <hr/>
    257. 

  257.         <div class="refsect2" lang="en"><h3><a name="xmlRegNewExecCtxt"/>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/>
    258. 

  258. </pre><p>Build a context used for progressive evaluation of a regexp.</p>
    259. 

  259. <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>
    260. 

  260.         <hr/>
    261. 

  261.         <div class="refsect2" lang="en"><h3><a name="xmlRegexpCompile"/>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/>
    262. 

  262. </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>
    263. 

  263. <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>
    264. 

  264.         <hr/>
    265. 

  265.         <div class="refsect2" lang="en"><h3><a name="xmlRegexpExec"/>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/>
    266. 

  266. </pre><p>Check if the regular expression generates the value</p>
    267. 

  267. <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>
    268. 

  268.         <hr/>
    269. 

  269.         <div class="refsect2" lang="en"><h3><a name="xmlRegexpIsDeterminist"/>xmlRegexpIsDeterminist ()</h3><pre class="programlisting">int	xmlRegexpIsDeterminist		(<a href="libxml2-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> comp)<br/>
    270. 

  270. </pre><p>Check if the regular expression is determinist</p>
    271. 

  271. <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>
    272. 

  272.         <hr/>
    273. 

  273.         <div class="refsect2" lang="en"><h3><a name="xmlRegexpPrint"/>xmlRegexpPrint ()</h3><pre class="programlisting">void	xmlRegexpPrint			(FILE * output, <br/>					 <a href="libxml2-xmlregexp.html#xmlRegexpPtr">xmlRegexpPtr</a> regexp)<br/>
    274. 

  274. </pre><p>Print the content of the compiled regular expression</p>
    275. 

  275. <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>
    276. 

  276.         <hr/>
    277. 

  277.       </div>
    278. 

  278.     </div>
    279. 

  279.   </body>
    280. 

  280. </html>
    281.