1<?xml version="1.0" encoding="UTF-8"?> 2<html> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> 5 <title>c14n: Provide Canonical XML and Exclusive XML Canonicalization</title> 6 <meta name="generator" content="Libxml2 devhelp stylesheet"/> 7 <link rel="start" href="index.html" title="libxml2 Reference Manual"/> 8 <link rel="up" href="general.html" title="API"/> 9 <link rel="stylesheet" href="style.css" type="text/css"/> 10 <link rel="chapter" href="general.html" title="API"/> 11 </head> 12 <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13 <table class="navigation" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2"> 14 <tr valign="middle"> 15 <td> 16 <a accesskey="p" href="libxml2-SAX2.html"> 17 <img src="left.png" width="24" height="24" border="0" alt="Prev"/> 18 </a> 19 </td> 20 <td> 21 <a accesskey="u" href="general.html"> 22 <img src="up.png" width="24" height="24" border="0" alt="Up"/> 23 </a> 24 </td> 25 <td> 26 <a accesskey="h" href="index.html"> 27 <img src="home.png" width="24" height="24" border="0" alt="Home"/> 28 </a> 29 </td> 30 <td> 31 <a accesskey="n" href="libxml2-catalog.html"> 32 <img src="right.png" width="24" height="24" border="0" alt="Next"/> 33 </a> 34 </td> 35 <th width="100%" align="center">libxml2 Reference Manual</th> 36 </tr> 37 </table> 38 <h2> 39 <span class="refentrytitle">c14n</span> 40 </h2> 41 <p>c14n - Provide Canonical XML and Exclusive XML Canonicalization</p> 42 <p>the c14n modules provides a "Canonical XML" implementation</p> 43 <p>Author(s): Aleksey Sanin <aleksey@aleksey.com> </p> 44 <div class="refsynopsisdiv"> 45 <h2>Synopsis</h2> 46 <pre class="synopsis">typedef enum <a href="#xmlC14NMode">xmlC14NMode</a>; 47int <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); 48int <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); 49typedef 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); 50int <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); 51int <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); 52</pre> 53 </div> 54 <div class="refsect1" lang="en"> 55 <h2>Description</h2> 56 </div> 57 <div class="refsect1" lang="en"> 58 <h2>Details</h2> 59 <div class="refsect2" lang="en"> 60 <div class="refsect2" lang="en"><h3><a name="xmlC14NMode">Enum </a>xmlC14NMode</h3><pre class="programlisting">enum <a href="#xmlC14NMode">xmlC14NMode</a> { 61 <a name="XML_C14N_1_0">XML_C14N_1_0</a> = 0 /* Origianal C14N 1.0 spec */ 62 <a name="XML_C14N_EXCLUSIVE_1_0">XML_C14N_EXCLUSIVE_1_0</a> = 1 /* Exclusive C14N 1.0 spec */ 63 <a name="XML_C14N_1_1">XML_C14N_1_1</a> = 2 /* C14N 1.1 spec */ 64}; 65</pre><p/> 66</div> 67 <hr/> 68 <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/> 69</pre><p>Signature for a C14N callback on visible nodes</p> 70<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> 71 <hr/> 72 <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/> 73</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> 74<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> 75 <hr/> 76 <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/> 77</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> 78<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> 79 <hr/> 80 <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/> 81</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> 82<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> 83 <hr/> 84 <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/> 85</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> 86<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> 87 <hr/> 88 </div> 89 </div> 90 </body> 91</html> 92
