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<span class="refentrytitle">c14n</span>
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<p>c14n - Provide Canonical XML and Exclusive XML Canonicalization</p>
<p>the c14n modules provides a "Canonical XML" implementation</p>
<p>Author(s): Aleksey Sanin <aleksey@aleksey.com> </p>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<pre class="synopsis">typedef enum <a href="#xmlC14NMode">xmlC14NMode</a>;
int <a href="#xmlC14NExecute">xmlC14NExecute</a> (<a href="libxml2-tree.html#xmlDocPtr">xmlDocPtr</a> doc, <br/> <a href="libxml2-c14n.html#xmlC14NIsVisibleCallback">xmlC14NIsVisibleCallback</a> is_visible_callback, <br/> void * user_data, <br/> int mode, <br/> <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** inclusive_ns_prefixes, <br/> int with_comments, <br/> <a href="libxml2-tree.html#xmlOutputBufferPtr">xmlOutputBufferPtr</a> buf);
int <a href="#xmlC14NDocSaveTo">xmlC14NDocSaveTo</a> (<a href="libxml2-tree.html#xmlDocPtr">xmlDocPtr</a> doc, <br/> <a href="libxml2-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> nodes, <br/> int mode, <br/> <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** inclusive_ns_prefixes, <br/> int with_comments, <br/> <a href="libxml2-tree.html#xmlOutputBufferPtr">xmlOutputBufferPtr</a> buf);
typedef int <a href="#xmlC14NIsVisibleCallback">xmlC14NIsVisibleCallback</a> (void * user_data, <br/> <a href="libxml2-tree.html#xmlNodePtr">xmlNodePtr</a> node, <br/> <a href="libxml2-tree.html#xmlNodePtr">xmlNodePtr</a> parent);
int <a href="#xmlC14NDocSave">xmlC14NDocSave</a> (<a href="libxml2-tree.html#xmlDocPtr">xmlDocPtr</a> doc, <br/> <a href="libxml2-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> nodes, <br/> int mode, <br/> <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** inclusive_ns_prefixes, <br/> int with_comments, <br/> const char * filename, <br/> int compression);
int <a href="#xmlC14NDocDumpMemory">xmlC14NDocDumpMemory</a> (<a href="libxml2-tree.html#xmlDocPtr">xmlDocPtr</a> doc, <br/> <a href="libxml2-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> nodes, <br/> int mode, <br/> <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** inclusive_ns_prefixes, <br/> int with_comments, <br/> <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** doc_txt_ptr);
</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="xmlC14NMode">Enum </a>xmlC14NMode</h3><pre class="programlisting">enum <a href="#xmlC14NMode">xmlC14NMode</a> {
<a name="XML_C14N_1_0">XML_C14N_1_0</a> = 0 /* Origianal C14N 1.0 spec */
<a name="XML_C14N_EXCLUSIVE_1_0">XML_C14N_EXCLUSIVE_1_0</a> = 1 /* Exclusive C14N 1.0 spec */
<a name="XML_C14N_1_1">XML_C14N_1_1</a> = 2 /* C14N 1.1 spec */
};
</pre><p/>
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<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlC14NIsVisibleCallback"/>Function type xmlC14NIsVisibleCallback</h3><pre class="programlisting">int xmlC14NIsVisibleCallback (void * user_data, <br/> <a href="libxml2-tree.html#xmlNodePtr">xmlNodePtr</a> node, <br/> <a href="libxml2-tree.html#xmlNodePtr">xmlNodePtr</a> parent)<br/>
</pre><p>Signature for a C14N callback on visible nodes</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>user_data</tt></i>:</span></td><td>user data</td></tr><tr><td><span class="term"><i><tt>node</tt></i>:</span></td><td>the curent node</td></tr><tr><td><span class="term"><i><tt>parent</tt></i>:</span></td><td>the parent node</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>1 if the node should be included</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlC14NDocDumpMemory"/>xmlC14NDocDumpMemory ()</h3><pre class="programlisting">int xmlC14NDocDumpMemory (<a href="libxml2-tree.html#xmlDocPtr">xmlDocPtr</a> doc, <br/> <a href="libxml2-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> nodes, <br/> int mode, <br/> <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** inclusive_ns_prefixes, <br/> int with_comments, <br/> <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** doc_txt_ptr)<br/>
</pre><p>Dumps the canonized image of given XML document into memory. For details see "Canonical XML" (http://www.w3.org/TR/xml-c14n) or "Exclusive XML Canonicalization" (http://www.w3.org/TR/xml-exc-c14n)</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>doc</tt></i>:</span></td><td>the XML document for canonization</td></tr><tr><td><span class="term"><i><tt>nodes</tt></i>:</span></td><td>the nodes set to be included in the canonized image or NULL if all document nodes should be included</td></tr><tr><td><span class="term"><i><tt>mode</tt></i>:</span></td><td>the c14n mode (see @xmlC14NMode)</td></tr><tr><td><span class="term"><i><tt>inclusive_ns_prefixes</tt></i>:</span></td><td>the list of inclusive namespace prefixes ended with a NULL or NULL if there is no inclusive namespaces (only for exclusive canonicalization, ignored otherwise)</td></tr><tr><td><span class="term"><i><tt>with_comments</tt></i>:</span></td><td>include comments in the result (!=0) or not (==0)</td></tr><tr><td><span class="term"><i><tt>doc_txt_ptr</tt></i>:</span></td><td>the memory pointer for allocated canonical XML text; the caller of this functions is responsible for calling xmlFree() to free allocated memory</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the number of bytes written on success or a negative value on fail</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlC14NDocSave"/>xmlC14NDocSave ()</h3><pre class="programlisting">int xmlC14NDocSave (<a href="libxml2-tree.html#xmlDocPtr">xmlDocPtr</a> doc, <br/> <a href="libxml2-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> nodes, <br/> int mode, <br/> <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** inclusive_ns_prefixes, <br/> int with_comments, <br/> const char * filename, <br/> int compression)<br/>
</pre><p>Dumps the canonized image of given XML document into the file. For details see "Canonical XML" (http://www.w3.org/TR/xml-c14n) or "Exclusive XML Canonicalization" (http://www.w3.org/TR/xml-exc-c14n)</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>doc</tt></i>:</span></td><td>the XML document for canonization</td></tr><tr><td><span class="term"><i><tt>nodes</tt></i>:</span></td><td>the nodes set to be included in the canonized image or NULL if all document nodes should be included</td></tr><tr><td><span class="term"><i><tt>mode</tt></i>:</span></td><td>the c14n mode (see @xmlC14NMode)</td></tr><tr><td><span class="term"><i><tt>inclusive_ns_prefixes</tt></i>:</span></td><td>the list of inclusive namespace prefixes ended with a NULL or NULL if there is no inclusive namespaces (only for exclusive canonicalization, ignored otherwise)</td></tr><tr><td><span class="term"><i><tt>with_comments</tt></i>:</span></td><td>include comments in the result (!=0) or not (==0)</td></tr><tr><td><span class="term"><i><tt>filename</tt></i>:</span></td><td>the filename to store canonical XML image</td></tr><tr><td><span class="term"><i><tt>compression</tt></i>:</span></td><td>the compression level (zlib requred): -1 - libxml default, 0 - uncompressed, >0 - compression level</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the number of bytes written success or a negative value on fail</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlC14NDocSaveTo"/>xmlC14NDocSaveTo ()</h3><pre class="programlisting">int xmlC14NDocSaveTo (<a href="libxml2-tree.html#xmlDocPtr">xmlDocPtr</a> doc, <br/> <a href="libxml2-xpath.html#xmlNodeSetPtr">xmlNodeSetPtr</a> nodes, <br/> int mode, <br/> <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** inclusive_ns_prefixes, <br/> int with_comments, <br/> <a href="libxml2-tree.html#xmlOutputBufferPtr">xmlOutputBufferPtr</a> buf)<br/>
</pre><p>Dumps the canonized image of given XML document into the provided buffer. For details see "Canonical XML" (http://www.w3.org/TR/xml-c14n) or "Exclusive XML Canonicalization" (http://www.w3.org/TR/xml-exc-c14n)</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>doc</tt></i>:</span></td><td>the XML document for canonization</td></tr><tr><td><span class="term"><i><tt>nodes</tt></i>:</span></td><td>the nodes set to be included in the canonized image or NULL if all document nodes should be included</td></tr><tr><td><span class="term"><i><tt>mode</tt></i>:</span></td><td>the c14n mode (see @xmlC14NMode)</td></tr><tr><td><span class="term"><i><tt>inclusive_ns_prefixes</tt></i>:</span></td><td>the list of inclusive namespace prefixes ended with a NULL or NULL if there is no inclusive namespaces (only for exclusive canonicalization, ignored otherwise)</td></tr><tr><td><span class="term"><i><tt>with_comments</tt></i>:</span></td><td>include comments in the result (!=0) or not (==0)</td></tr><tr><td><span class="term"><i><tt>buf</tt></i>:</span></td><td>the output buffer to store canonical XML; this buffer MUST have encoder==NULL because C14N requires UTF-8 output</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>non-negative value on success or a negative value on fail</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="xmlC14NExecute"/>xmlC14NExecute ()</h3><pre class="programlisting">int xmlC14NExecute (<a href="libxml2-tree.html#xmlDocPtr">xmlDocPtr</a> doc, <br/> <a href="libxml2-c14n.html#xmlC14NIsVisibleCallback">xmlC14NIsVisibleCallback</a> is_visible_callback, <br/> void * user_data, <br/> int mode, <br/> <a href="libxml2-xmlstring.html#xmlChar">xmlChar</a> ** inclusive_ns_prefixes, <br/> int with_comments, <br/> <a href="libxml2-tree.html#xmlOutputBufferPtr">xmlOutputBufferPtr</a> buf)<br/>
</pre><p>Dumps the canonized image of given XML document into the provided buffer. For details see "Canonical XML" (http://www.w3.org/TR/xml-c14n) or "Exclusive XML Canonicalization" (http://www.w3.org/TR/xml-exc-c14n)</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>doc</tt></i>:</span></td><td>the XML document for canonization</td></tr><tr><td><span class="term"><i><tt>is_visible_callback</tt></i>:</span></td><td>the function to use to determine is node visible or not</td></tr><tr><td><span class="term"><i><tt>user_data</tt></i>:</span></td><td>the first parameter for @is_visible_callback function (in most cases, it is nodes set)</td></tr><tr><td><span class="term"><i><tt>mode</tt></i>:</span></td><td>the c14n mode (see @xmlC14NMode)</td></tr><tr><td><span class="term"><i><tt>inclusive_ns_prefixes</tt></i>:</span></td><td>the list of inclusive namespace prefixes ended with a NULL or NULL if there is no inclusive namespaces (only for exclusive canonicalization, ignored otherwise)</td></tr><tr><td><span class="term"><i><tt>with_comments</tt></i>:</span></td><td>include comments in the result (!=0) or not (==0)</td></tr><tr><td><span class="term"><i><tt>buf</tt></i>:</span></td><td>the output buffer to store canonical XML; this buffer MUST have encoder==NULL because C14N requires UTF-8 output</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>non-negative value on success or a negative value on fail</td></tr></tbody></table></div></div>
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