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<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>c14n: Provide Canonical XML and Exclusive XML Canonicalization</title> <meta name="generator" content="Libxml2 devhelp stylesheet"> <link rel="start" href="index.html" title="libxml2 Reference Manual"> <link rel="up" href="general.html" title="API"> <link rel="stylesheet" href="style.css" type="text/css"> <link rel="chapter" href="general.html" title="API"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table class="navigation" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2"><tr valign="middle"> <td><a accesskey="p" href="libxml2-SAX2.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td> <td><a accesskey="u" href="general.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td> <td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td> <td><a accesskey="n" href="libxml2-catalog.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td> <th width="100%" align="center">libxml2 Reference Manual</th> </tr></table> <h2><span class="refentrytitle">c14n</span></h2> <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="#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); 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="#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); 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); 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); </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 /* Original 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></p> </div> <hr> <div class="refsect2" lang="en"> <h3> <a name="xmlC14NIsVisibleCallback"></a>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 current 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"></a>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"></a>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 required): -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"></a>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"></a>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> <hr> </div> </div> </body> </html>
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