libxml-encoding.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>Generic front-end for encoding handler close function</p>
<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>handler</tt></i>:</span></td><td>char enconding transformation data structure</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 if success, or -1 in case of error</td></tr></tbody></table></div><h3><a name="xmlCharEncFirstLine" id="xmlCharEncFirstLine"></a>Function: xmlCharEncFirstLine</h3><pre class="programlisting">int	xmlCharEncFirstLine		(<a href="libxml-encoding.html#xmlCharEncodingHandler">xmlCharEncodingHandler</a> * handler, <br />					 <a href="libxml-tree.html#xmlBufferPtr">xmlBufferPtr</a> out, <br />					 <a href="libxml-tree.html#xmlBufferPtr">xmlBufferPtr</a> in)<br />
</pre><p>Front-end for the encoding handler input function, but handle only the very first line, i.e. limit itself to 45 chars.</p>
<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>handler</tt></i>:</span></td><td>char enconding transformation data structure</td></tr><tr><td><span class="term"><i><tt>out</tt></i>:</span></td><td>an <a href="libxml-tree.html#xmlBuffer">xmlBuffer</a> for the output.</td></tr><tr><td><span class="term"><i><tt>in</tt></i>:</span></td><td>an <a href="libxml-tree.html#xmlBuffer">xmlBuffer</a> for the input</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the number of byte written if success, or -1 general error -2 if the transcoding fails (for *in is not valid utf8 string or the result of transformation can't fit into the encoding we want), or</td></tr></tbody></table></div><h3><a name="xmlCharEncInFunc" id="xmlCharEncInFunc"></a>Function: xmlCharEncInFunc</h3><pre class="programlisting">int	xmlCharEncInFunc		(<a href="libxml-encoding.html#xmlCharEncodingHandler">xmlCharEncodingHandler</a> * handler, <br />					 <a href="libxml-tree.html#xmlBufferPtr">xmlBufferPtr</a> out, <br />					 <a href="libxml-tree.html#xmlBufferPtr">xmlBufferPtr</a> in)<br />
</pre><p>Generic front-end for the encoding handler input function</p>
<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>handler</tt></i>:</span></td><td>char encoding transformation data structure</td></tr><tr><td><span class="term"><i><tt>out</tt></i>:</span></td><td>an <a href="libxml-tree.html#xmlBuffer">xmlBuffer</a> for the output.</td></tr><tr><td><span class="term"><i><tt>in</tt></i>:</span></td><td>an <a href="libxml-tree.html#xmlBuffer">xmlBuffer</a> for the input</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the number of byte written if success, or -1 general error -2 if the transcoding fails (for *in is not valid utf8 string or the result of transformation can't fit into the encoding we want), or</td></tr></tbody></table></div><h3><a name="xmlCharEncOutFunc" id="xmlCharEncOutFunc"></a>Function: xmlCharEncOutFunc</h3><pre class="programlisting">int	xmlCharEncOutFunc		(<a href="libxml-encoding.html#xmlCharEncodingHandler">xmlCharEncodingHandler</a> * handler, <br />					 <a href="libxml-tree.html#xmlBufferPtr">xmlBufferPtr</a> out, <br />					 <a href="libxml-tree.html#xmlBufferPtr">xmlBufferPtr</a> in)<br />
</pre><p>Generic front-end for the encoding handler output function a first call with @in == NULL has to be made firs to initiate the output in case of non-stateless encoding needing to initiate their state or the output (like the BOM in UTF16). In case of UTF8 sequence conversion errors for the given encoder, the content will be automatically remapped to a CharRef sequence.</p>
<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>handler</tt></i>:</span></td><td>char enconding transformation data structure</td></tr><tr><td><span class="term"><i><tt>out</tt></i>:</span></td><td>an <a href="libxml-tree.html#xmlBuffer">xmlBuffer</a> for the output.</td></tr><tr><td><span class="term"><i><tt>in</tt></i>:</span></td><td>an <a href="libxml-tree.html#xmlBuffer">xmlBuffer</a> for the input</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the number of byte written if success, or -1 general error -2 if the transcoding fails (for *in is not valid utf8 string or the result of transformation can't fit into the encoding we want), or</td></tr></tbody></table></div><h3><a name="xmlCharEncodingInputFunc" id="xmlCharEncodingInputFunc"></a>Function type: xmlCharEncodingInputFunc</h3><pre class="programlisting">Function type: xmlCharEncodingInputFunc
int	xmlCharEncodingInputFunc	(unsigned char * out, <br />					 int * outlen, <br />					 const unsigned char * in, <br />					 int * inlen)
</pre><p>Take a block of chars in the original encoding and try to convert it to an UTF-8 block of chars out.</p><div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>out</tt></i>:</span></td><td>a pointer to an array of bytes to store the UTF-8 result</td></tr><tr><td><span class="term"><i><tt>outlen</tt></i>:</span></td><td>the length of @out</td></tr><tr><td><span class="term"><i><tt>in</tt></i>:</span></td><td>a pointer to an array of chars in the original encoding</td></tr><tr><td><span class="term"><i><tt>inlen</tt></i>:</span></td><td>the length of @in</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the number of bytes written, -1 if lack of space, or -2 if the transcoding failed. The value of @inlen after return is the number of octets consumed if the return value is positive, else unpredictiable. The value of @outlen after return is the number of octets consumed.</td></tr></tbody></table></div><br />
<h3><a name="xmlCharEncodingOutputFunc" id="xmlCharEncodingOutputFunc"></a>Function type: xmlCharEncodingOutputFunc</h3><pre class="programlisting">Function type: xmlCharEncodingOutputFunc
int	xmlCharEncodingOutputFunc	(unsigned char * out, <br />					 int * outlen, <br />					 const unsigned char * in, <br />					 int * inlen)
</pre><p>Take a block of UTF-8 chars in and try to convert it to another encoding. Note: a first call designed to produce heading info is called with in = NULL. If stateful this should also initialize the encoder state.</p><div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>out</tt></i>:</span></td><td>a pointer to an array of bytes to store the result</td></tr><tr><td><span class="term"><i><tt>outlen</tt></i>:</span></td><td>the length of @out</td></tr><tr><td><span class="term"><i><tt>in</tt></i>:</span></td><td>a pointer to an array of UTF-8 chars</td></tr><tr><td><span class="term"><i><tt>inlen</tt></i>:</span></td><td>the length of @in</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the number of bytes written, -1 if lack of space, or -2 if the transcoding failed. The value of @inlen after return is the number of octets consumed if the return value is positive, else unpredictiable. The value of @outlen after return is the number of octets produced.</td></tr></tbody></table></div><br />
<h3><a name="xmlCleanupCharEncodingHandlers" id="xmlCleanupCharEncodingHandlers"></a>Function: xmlCleanupCharEncodingHandlers</h3><pre class="programlisting">void	xmlCleanupCharEncodingHandlers	(void)<br />
</pre><p>Cleanup the memory allocated for the char encoding support, it unregisters all the encoding handlers and the aliases.</p>
<h3><a name="xmlCleanupEncodingAliases" id="xmlCleanupEncodingAliases"></a>Function: xmlCleanupEncodingAliases</h3><pre class="programlisting">void	xmlCleanupEncodingAliases	(void)<br />
</pre><p>Unregisters all aliases</p>
<h3><a name="xmlDelEncodingAlias" id="xmlDelEncodingAlias"></a>Function: xmlDelEncodingAlias</h3><pre class="programlisting">int	xmlDelEncodingAlias		(const char * alias)<br />
</pre><p>Unregisters an encoding alias @alias</p>
<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>alias</tt></i>:</span></td><td>the alias name as parsed, in UTF-8 format (ASCII actually)</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success, -1 in case of error</td></tr></tbody></table></div><h3><a name="xmlDetectCharEncoding" id="xmlDetectCharEncoding"></a>Function: xmlDetectCharEncoding</h3><pre class="programlisting"><a href="libxml-encoding.html#xmlCharEncoding">xmlCharEncoding</a>	xmlDetectCharEncoding	(const unsigned char * in, <br />					 int len)<br />
</pre><p>Guess the encoding of the entity using the first bytes of the entity content according to the non-normative appendix F of the XML-1.0 recommendation.</p>
<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>in</tt></i>:</span></td><td>a pointer to the first bytes of the XML entity, must be at least 2 bytes long (at least 4 if encoding is UTF4 variant).</td></tr><tr><td><span class="term"><i><tt>len</tt></i>:</span></td><td>pointer to the length of the buffer</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>one of the XML_CHAR_ENCODING_... values.</td></tr></tbody></table></div><h3><a name="xmlFindCharEncodingHandler" id="xmlFindCharEncodingHandler"></a>Function: xmlFindCharEncodingHandler</h3><pre class="programlisting"><a href="libxml-encoding.html#xmlCharEncodingHandlerPtr">xmlCharEncodingHandlerPtr</a>	xmlFindCharEncodingHandler	(const char * name)<br />
</pre><p>Search in the registered set the handler able to read/write that encoding.</p>
<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>a string describing the char encoding.</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the handler or NULL if not found</td></tr></tbody></table></div><h3><a name="xmlGetCharEncodingHandler" id="xmlGetCharEncodingHandler"></a>Function: xmlGetCharEncodingHandler</h3><pre class="programlisting"><a href="libxml-encoding.html#xmlCharEncodingHandlerPtr">xmlCharEncodingHandlerPtr</a>	xmlGetCharEncodingHandler	(<a href="libxml-encoding.html#xmlCharEncoding">xmlCharEncoding</a> enc)<br />
</pre><p>Search in the registered set the handler able to read/write that encoding.</p>
<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>enc</tt></i>:</span></td><td>an <a href="libxml-encoding.html#xmlCharEncoding">xmlCharEncoding</a> value.</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the handler or NULL if not found</td></tr></tbody></table></div><h3><a name="xmlGetCharEncodingName" id="xmlGetCharEncodingName"></a>Function: xmlGetCharEncodingName</h3><pre class="programlisting">const char *	xmlGetCharEncodingName	(<a href="libxml-encoding.html#xmlCharEncoding">xmlCharEncoding</a> enc)<br />
</pre><p>The "canonical" name for XML encoding. C.f. http://www.w3.org/TR/REC-xml#charencoding Section 4.3.3 Character Encoding in Entities</p>
<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>enc</tt></i>:</span></td><td>the encoding</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the canonical name for the given encoding</td></tr></tbody></table></div><h3><a name="xmlGetEncodingAlias" id="xmlGetEncodingAlias"></a>Function: xmlGetEncodingAlias</h3><pre class="programlisting">const char *	xmlGetEncodingAlias	(const char * alias)<br />
</pre><p>Lookup an encoding name for the given alias.</p>
<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>alias</tt></i>:</span></td><td>the alias name as parsed, in UTF-8 format (ASCII actually)</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>NULL if not found, otherwise the original name</td></tr></tbody></table></div><h3><a name="xmlInitCharEncodingHandlers" id="xmlInitCharEncodingHandlers"></a>Function: xmlInitCharEncodingHandlers</h3><pre class="programlisting">void	xmlInitCharEncodingHandlers	(void)<br />
</pre><p>Initialize the char encoding support, it registers the default encoding supported. NOTE: while public, this function usually doesn't need to be called in normal processing.</p>
<h3><a name="xmlNewCharEncodingHandler" id="xmlNewCharEncodingHandler"></a>Function: xmlNewCharEncodingHandler</h3><pre class="programlisting"><a href="libxml-encoding.html#xmlCharEncodingHandlerPtr">xmlCharEncodingHandlerPtr</a>	xmlNewCharEncodingHandler	(const char * name, <br />							 <a href="libxml-encoding.html#xmlCharEncodingInputFunc">xmlCharEncodingInputFunc</a> input, <br />							 <a href="libxml-encoding.html#xmlCharEncodingOutputFunc">xmlCharEncodingOutputFunc</a> output)<br />
</pre><p>Create and registers an xmlCharEncodingHandler.</p>
<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the encoding name, in UTF-8 format (ASCII actually)</td></tr><tr><td><span class="term"><i><tt>input</tt></i>:</span></td><td>the <a href="libxml-encoding.html#xmlCharEncodingInputFunc">xmlCharEncodingInputFunc</a> to read that encoding</td></tr><tr><td><span class="term"><i><tt>output</tt></i>:</span></td><td>the <a href="libxml-encoding.html#xmlCharEncodingOutputFunc">xmlCharEncodingOutputFunc</a> to write that encoding</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the <a href="libxml-encoding.html#xmlCharEncodingHandlerPtr">xmlCharEncodingHandlerPtr</a> created (or NULL in case of error).</td></tr></tbody></table></div><h3><a name="xmlParseCharEncoding" id="xmlParseCharEncoding"></a>Function: xmlParseCharEncoding</h3><pre class="programlisting"><a href="libxml-encoding.html#xmlCharEncoding">xmlCharEncoding</a>	xmlParseCharEncoding	(const char * name)<br />
</pre><p>Compare the string to the encoding schemes already known. Note that the comparison is case insensitive accordingly to the section [XML] 4.3.3 Character Encoding in Entities.</p>
<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>the encoding name as parsed, in UTF-8 format (ASCII actually)</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>one of the XML_CHAR_ENCODING_... values or <a href="libxml-encoding.html#XML_CHAR_ENCODING_NONE">XML_CHAR_ENCODING_NONE</a> if not recognized.</td></tr></tbody></table></div><h3><a name="xmlRegisterCharEncodingHandler" id="xmlRegisterCharEncodingHandler"></a>Function: xmlRegisterCharEncodingHandler</h3><pre class="programlisting">void	xmlRegisterCharEncodingHandler	(<a href="libxml-encoding.html#xmlCharEncodingHandlerPtr">xmlCharEncodingHandlerPtr</a> handler)<br />
</pre><p>Register the char encoding handler, surprising, isn't it ?</p>
<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>handler</tt></i>:</span></td><td>the <a href="libxml-encoding.html#xmlCharEncodingHandlerPtr">xmlCharEncodingHandlerPtr</a> handler block</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>