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Module c14n from libxml2

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the c14n modules provides a "Canonical XML" implementation

Table of Contents

int	xmlC14NDocDumpMemory		(xmlDocPtr doc, 
xmlNodeSetPtr nodes,
int exclusive,
xmlChar ** inclusive_ns_prefixes,
int with_comments,
xmlChar ** doc_txt_ptr)
int	xmlC14NDocSave			(xmlDocPtr doc, 
xmlNodeSetPtr nodes,
int exclusive,
xmlChar ** inclusive_ns_prefixes,
int with_comments,
const char * filename,
int compression)
int	xmlC14NDocSaveTo		(xmlDocPtr doc, 
xmlNodeSetPtr nodes,
int exclusive,
xmlChar ** inclusive_ns_prefixes,
int with_comments,
xmlOutputBufferPtr buf)
int	xmlC14NExecute			(xmlDocPtr doc, 
xmlC14NIsVisibleCallback is_visible_callback,
void * user_data,
int exclusive,
xmlChar ** inclusive_ns_prefixes,
int with_comments,
xmlOutputBufferPtr buf)
Function type: xmlC14NIsVisibleCallback
int	xmlC14NIsVisibleCallback	(void * user_data, 
xmlNodePtr node,
xmlNodePtr parent)

Description

Function: xmlC14NDocDumpMemory

int	xmlC14NDocDumpMemory		(xmlDocPtr doc, 
xmlNodeSetPtr nodes,
int exclusive,
xmlChar ** inclusive_ns_prefixes,
int with_comments,
xmlChar ** doc_txt_ptr)

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)

doc:the XML document for canonization
nodes:the nodes set to be included in the canonized image or NULL if all document nodes should be included
exclusive:the exclusive flag (0 - non-exclusive canonicalization; otherwise - exclusive canonicalization)
inclusive_ns_prefixes:the list of inclusive namespace prefixes ended with a NULL or NULL if there is no inclusive namespaces (only for exclusive canonicalization, ignored otherwise)
with_comments:include comments in the result (!=0) or not (==0)
doc_txt_ptr:the memory pointer for allocated canonical XML text; the caller of this functions is responsible for calling xmlFree() to free allocated memory
Returns:the number of bytes written on success or a negative value on fail

Function: xmlC14NDocSave

int	xmlC14NDocSave			(xmlDocPtr doc, 
xmlNodeSetPtr nodes,
int exclusive,
xmlChar ** inclusive_ns_prefixes,
int with_comments,
const char * filename,
int compression)

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)

doc:the XML document for canonization
nodes:the nodes set to be included in the canonized image or NULL if all document nodes should be included
exclusive:the exclusive flag (0 - non-exclusive canonicalization; otherwise - exclusive canonicalization)
inclusive_ns_prefixes:the list of inclusive namespace prefixes ended with a NULL or NULL if there is no inclusive namespaces (only for exclusive canonicalization, ignored otherwise)
with_comments:include comments in the result (!=0) or not (==0)
filename:the filename to store canonical XML image
compression:the compression level (zlib requred): -1 - libxml default, 0 - uncompressed, >0 - compression level
Returns:the number of bytes written success or a negative value on fail

Function: xmlC14NDocSaveTo

int	xmlC14NDocSaveTo		(xmlDocPtr doc, 
xmlNodeSetPtr nodes,
int exclusive,
xmlChar ** inclusive_ns_prefixes,
int with_comments,
xmlOutputBufferPtr buf)

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)

doc:the XML document for canonization
nodes:the nodes set to be included in the canonized image or NULL if all document nodes should be included
exclusive:the exclusive flag (0 - non-exclusive canonicalization; otherwise - exclusive canonicalization)
inclusive_ns_prefixes:the list of inclusive namespace prefixes ended with a NULL or NULL if there is no inclusive namespaces (only for exclusive canonicalization, ignored otherwise)
with_comments:include comments in the result (!=0) or not (==0)
buf:the output buffer to store canonical XML; this buffer MUST have encoder==NULL because C14N requires UTF-8 output
Returns:non-negative value on success or a negative value on fail

Function: xmlC14NExecute

int	xmlC14NExecute			(xmlDocPtr doc, 
xmlC14NIsVisibleCallback is_visible_callback,
void * user_data,
int exclusive,
xmlChar ** inclusive_ns_prefixes,
int with_comments,
xmlOutputBufferPtr buf)

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)

doc:the XML document for canonization
is_visible_callback:the function to use to determine is node visible or not
user_data:the first parameter for @is_visible_callback function (in most cases, it is nodes set)
exclusive:the exclusive flag (0 - non-exclusive canonicalization; otherwise - exclusive canonicalization)
inclusive_ns_prefixes:the list of inclusive namespace prefixes ended with a NULL or NULL if there is no inclusive namespaces (only for exclusive canonicalization, ignored otherwise)
with_comments:include comments in the result (!=0) or not (==0)
buf:the output buffer to store canonical XML; this buffer MUST have encoder==NULL because C14N requires UTF-8 output
Returns:non-negative value on success or a negative value on fail

Function type: xmlC14NIsVisibleCallback

Function type: xmlC14NIsVisibleCallback
int	xmlC14NIsVisibleCallback	(void * user_data, 
xmlNodePtr node,
xmlNodePtr parent)

Signature for a C14N callback on visible nodes

user_data:user data
node:the curent node
parent:the parent node
Returns:1 if the node should be included

Daniel Veillard