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/*
* Copyright (C) 2010-2011 Mamadou Diop.
*
* Contact: Mamadou Diop <diopmamadou(at)doubango[dot]org>
*
* This file is part of Open Source Doubango Framework.
*
* DOUBANGO is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* DOUBANGO is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with DOUBANGO.
*
*/
/**@file tsk_xml.c
* @brief Useful functions to manipulate xml documents.
*
* @author Mamadou Diop <diopmamadou(at)doubango[dot]org>
*
*/
#include "tsk_xml.h"
#if HAVE_LIBXML2_H
#include "tsk_string.h"
#include "tsk_memory.h"
#include "tsk_macros.h"
#include <string.h>
/**@defgroup tsk_xml_group XML
*/
/**@page tsk_xml_page XML Tutorial
*/
/**@ingroup tsk_xml_group
* Initialize an XML namespace
* @param namespace The XML namespace to initialize.
*/
/*void tsk_xml_namespace_init(tsk_xml_namespace_t* namespace)
{
}*/
/**@ingroup tsk_xml_group
* Free an XML namespace
* @param namespace The namespace to free
*/
/*void tsk_xml_namespace_free(tsk_xml_namespace_t** namespace)
{
TSK_FREE((*namespace)->prefix);
TSK_FREE((*namespace)->value);
TSK_FREE(namespace);
}*/
/**@ingroup tsk_xml_group
* Initialize an XML element
* @param element The XML element to initialize
*/
/*void tsk_xml_element_init(tsk_xml_element_t* element)
{
}*/
/**@ingroup tsk_xml_group
* Initialize an XML element and set values
* @param element The XML element to initialize
* @param name The element name
* @param value The element value
* @param type The element type
*/
void tsk_xml_element_init_set(tsk_xml_element_t** element, const char* name, const char* value, tsk_xml_type_t type)
{
TSK_XML_ELEMENT_CREATE((*element));
(*element)->elements = TSK_LIST_CREATE();
(*element)->attributes = TSK_LIST_CREATE();
(*element)->namespaces = TSK_LIST_CREATE();
(*element)->name = tsk_strdup(name);
(*element)->value = tsk_strdup(value);
(*element)->type = type;
}
/**@ingroup tsk_xml_group
* Free an XML element
* @param _element The XML element to free
*/
/*void tsk_xml_element_free(void** _element)
{
tsk_xml_element_t** element = (tsk_xml_element_t**)_element;
TSK_FREE((*element)->name);
TSK_FREE((*element)->value);
TSK_OBJECT_SAFE_FREE((*element)->elements);
TSK_OBJECT_SAFE_FREE((*element)->attributes);
TSK_OBJECT_SAFE_FREE((*element)->namespaces);
TSK_FREE(element);
}*/
/**@ingroup tsk_xml_group
* Initialize an XML attribute
* @param attribute The XML attribute to initialize
*/
/*void tsk_xml_attribute_init(tsk_xml_attribute_t* attribute)
{
}*/
/**@ingroup tsk_xml_group
* Free an XML attribute
* @param attribute The XML attribute to free
*/
/*void tsk_xml_attribute_free(tsk_xml_attribute_t** attribute)
{
TSK_FREE((*attribute)->name);
TSK_FREE((*attribute)->value);
TSK_FREE(attribute);
}*/
/**@ingroup tsk_xml_group
* Get an XML namespace from an XML document
* @param docPtr A pointer to the XML document
* @param node The XML node from which to extract the namespace
* @param href The namespace href
* @retval The Namespace value matching our criteria (href)
*/
xmlNsPtr tsk_xml_get_namespace(xmlDocPtr docPtr, xmlNodePtr node, const char *href)
{
xmlNs *ns = *xmlGetNsList(docPtr, node);
while (ns) {
if (tsk_striequals(ns->href, href)) {
return ns;
}
else {
ns = ns->next;
}
}
return 0;
}
/**@ingroup tsk_xml_group
* Find an XML node by name
* @param curr The XML node from which to start
* @param name The name of the XML node to find
* @param ftype The find type
* @retval Returns the node which match our criteria. If none match, this method returns NULL.
*/
xmlNodePtr tsk_xml_find_node(const xmlNodePtr curr, const char* name, tsk_xml_node_find_type_t ftype)
{
xmlNodePtr node = curr;
while(node) {
switch(ftype) {
case nft_none:
return (tsk_striequals(node->name, name))? node : 0;
case nft_children:
node = node->children;
break;
case nft_parent:
node = node->parent;
break;
case nft_next:
node = node->next;
break;
case nft_prev:
node = node->prev;
break;
default:
return 0;
} /* switch */
/* check and return value if match */
if( node && (!name || tsk_striequals(node->name, name)) )
//if( node && (name == 0 || !tsk_stricmp((const char*)node->name, name)) )
{
return node;
}
}
return 0;
}
/**@ingroup tsk_xml_group
* Select an XML node
* @retval Returns the pointer to the node which match our criteria. If none match, this method returns NULL.
*/
xmlNodePtr tsk_xml_select_node(const xmlNodePtr root, ...)
{
va_list list;
int step;
char* root_name = 0;
xmlNodePtr node = root;
if(!node || !(node->name)) {
return 0;
}
/* initialize variable arguments */
va_start(list, root);
while( node && (step=va_arg(list, tsk_xml_node_select_type_t)) != nst_end) {
switch(step) {
case nst_by_name: {
/* name */
const char* qname = va_arg(list, const char*);
if(tsk_striequals(root->name, qname)) {
node = tsk_xml_find_node(node, 0, nft_children);
}
else {
if(!tsk_striequals(node->name, qname)) {
/* do not match */
node = tsk_xml_find_node(node, qname, nft_next);
}
else {
/* already match */
node = node->children;
}
}
break;
}
case nst_content: {
/**/
node = tsk_xml_find_node(node, 0, nft_children);
break;
}
case nst_att_value: {
/* qname, att_name */
xmlAttrPtr attrPtr = 0;
int found = 0;
const char* qname = va_arg(list, const char*);
const char* att_name = va_arg(list, const char*);
node = tsk_xml_find_node(node, qname, nft_none);
while( node && !found ) {
attrPtr = node->properties;
while(attrPtr) {
if(attrPtr->type == XML_ATTRIBUTE_NODE && attrPtr->children) {
if( tsk_striequals(attrPtr->name, att_name) ) {
node = attrPtr->children;
found = 1;
}
}
attrPtr = attrPtr->next;
}
if(!found) {
node = tsk_xml_find_node(node, 0, nft_next);
}
}
break;
}
case nst_by_att: {
/* qname att_name att_value */
xmlAttrPtr attrPtr = 0;
int found = 0;
const char* qname = va_arg(list, const char*);
const char* att_name = va_arg(list, const char*);
const char* att_value = va_arg(list, const char*);
node = tsk_xml_find_node(node, qname, nft_none);
while( node && !found ) {
attrPtr = node->properties;
while(attrPtr) {
if(attrPtr->type == XML_ATTRIBUTE_NODE && attrPtr->children) {
if( tsk_striequals(attrPtr->name, att_name)
&& ( (attrPtr->children->content && tsk_striequals(attrPtr->children->content, att_value)) || !att_value )
) {
found = 1;
}
}
attrPtr = attrPtr->next;
}
if(!found) {
node = tsk_xml_find_node(node, 0, nft_next);
}
}
if(found && node) {
break;
}
else {
return 0;
}
break;
}
default:
return 0;
} /* switch */
/* skip all comments */
TSK_XML_NODE_SKIP_COMMENTS(node);
} /* while*/
return node;
}
#endif /* HAVE_LIBXML2_H */
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