libxml-xmlregexp.html

xml开源解析代码.版本为libxml2-2.6.29,可支持GB3212.网络消息发送XML时很有用.

</pre><p>Finds if the expression is nillable, i.e. if it accepts the empty sequqnce</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><h3><a name="xmlExpMaxToken" id="xmlExpMaxToken"></a>Function: xmlExpMaxToken</h3><pre class="programlisting">int	xmlExpMaxToken			(<a href="libxml-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><h3><a name="xmlExpNewAtom" id="xmlExpNewAtom"></a>Function: xmlExpNewAtom</h3><pre class="programlisting"><a href="libxml-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a>	xmlExpNewAtom		(<a href="libxml-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br />					 const <a href="libxml-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 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><h3><a name="xmlExpNewCtxt" id="xmlExpNewCtxt"></a>Function: xmlExpNewCtxt</h3><pre class="programlisting"><a href="libxml-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a>	xmlExpNewCtxt		(int maxNodes, <br />					 <a href="libxml-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 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><h3><a name="xmlExpNewOr" id="xmlExpNewOr"></a>Function: xmlExpNewOr</h3><pre class="programlisting"><a href="libxml-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a>	xmlExpNewOr		(<a href="libxml-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br />					 <a href="libxml-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> left, <br />					 <a href="libxml-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><h3><a name="xmlExpNewRange" id="xmlExpNewRange"></a>Function: xmlExpNewRange</h3><pre class="programlisting"><a href="libxml-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a>	xmlExpNewRange		(<a href="libxml-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br />					 <a href="libxml-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><h3><a name="xmlExpNewSeq" id="xmlExpNewSeq"></a>Function: xmlExpNewSeq</h3><pre class="programlisting"><a href="libxml-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a>	xmlExpNewSeq		(<a href="libxml-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br />					 <a href="libxml-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> left, <br />					 <a href="libxml-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><h3><a name="xmlExpParse" id="xmlExpParse"></a>Function: xmlExpParse</h3><pre class="programlisting"><a href="libxml-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a>	xmlExpParse		(<a href="libxml-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><h3><a name="xmlExpRef" id="xmlExpRef"></a>Function: xmlExpRef</h3><pre class="programlisting">void	xmlExpRef			(<a href="libxml-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp)<br />
</pre><p>Increase the <a href="libxml-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><h3><a name="xmlExpStringDerive" id="xmlExpStringDerive"></a>Function: xmlExpStringDerive</h3><pre class="programlisting"><a href="libxml-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a>	xmlExpStringDerive	(<a href="libxml-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br />					 <a href="libxml-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp, <br />					 const <a href="libxml-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><h3><a name="xmlExpSubsume" id="xmlExpSubsume"></a>Function: xmlExpSubsume</h3><pre class="programlisting">int	xmlExpSubsume			(<a href="libxml-xmlregexp.html#xmlExpCtxtPtr">xmlExpCtxtPtr</a> ctxt, <br />					 <a href="libxml-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp, <br />					 <a href="libxml-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> sub)<br />
</pre><p>Check whether @exp accepts all the languages accexpted 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><h3><a name="xmlRegExecCallbacks" id="xmlRegExecCallbacks"></a>Function type: xmlRegExecCallbacks</h3><pre class="programlisting">Function type: xmlRegExecCallbacks
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)
</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 />
<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 />
</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>
<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 />
</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>
<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 />
</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><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 />
</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><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 />
</pre><p>Free the structures associated to a regular expression evaulation 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 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 />
</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><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 />
</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><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 />
</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><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 />
</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><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 />
</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><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 />
</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><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>