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/*
* Copyright (C) 2007 Martin Willi
* Hochschule fuer Technik Rapperswil
*
* This program 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 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program 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.
*
* $Id: xml.c 3589 2008-03-13 14:14:44Z martin $
*/
#include "xml.h"
#include <libxml/parser.h>
#include <libxml/tree.h>
typedef struct private_xml_t private_xml_t;
/**
* private data of xml
*/
struct private_xml_t {
/**
* public functions
*/
xml_t public;
/**
* root node of this xml (part)
*/
xmlNode *node;
/**
* document, only for root xml_t
*/
xmlDoc *doc;
/**
* Root xml_t*
*/
private_xml_t *root;
/**
* number of enumerator instances
*/
int enums;
};
/**
* child element enumerator
*/
typedef struct {
/** enumerator interface */
enumerator_t e;
/** current child context (returned to enumerate() caller) */
private_xml_t child;
/** currently processing node */
xmlNode *node;
} child_enum_t;
/**
* Implementation of xml_t.children().enumerate().
*/
static bool child_enumerate(child_enum_t *e, private_xml_t **child,
char **name, char **value)
{
while (e->node && e->node->type != XML_ELEMENT_NODE)
{
e->node = e->node->next;
}
if (e->node)
{
xmlNode *text;
text = e->node->children;
*value = NULL;
while (text && text->type != XML_TEXT_NODE)
{
text = text->next;
}
if (text)
{
*value = text->content;
}
*name = (char*)e->node->name;
*child = &e->child;
e->child.node = e->node->children;
e->node = e->node->next;
return TRUE;
}
return FALSE;
}
/**
* Implementation of xml_t.get_attribute.
*/
static char* get_attribute(private_xml_t *this, char *name)
{
return NULL;
}
/**
* destroy enumerator, and complete tree if this was the last enumerator
*/
static void child_destroy(child_enum_t *this)
{
if (--this->child.root->enums == 0)
{
xmlFreeDoc(this->child.root->doc);
free(this->child.root);
}
free(this);
}
/**
* Implementation of xml_t.children.
*/
static enumerator_t* children(private_xml_t *this)
{
child_enum_t *ce = malloc_thing(child_enum_t);
ce->e.enumerate = (void*)child_enumerate;
ce->e.destroy = (void*)child_destroy;
ce->node = this->node;
ce->child.public.children = (void*)children;
ce->child.public.get_attribute = (void*)get_attribute;
ce->child.node = NULL;
ce->child.doc = this->doc;
ce->child.root = this->root;
this->root->enums++;
return &ce->e;
}
/*
* see header file
*/
xml_t *xml_create(char *xml)
{
private_xml_t *this = malloc_thing(private_xml_t);
this->public.get_attribute = (char*(*)(xml_t*,char*))get_attribute;
this->public.children = (enumerator_t*(*)(xml_t*))children;
this->doc = xmlReadMemory(xml, strlen(xml), NULL, NULL, 0);
if (this->doc == NULL)
{
free(this);
return NULL;
}
this->node = xmlDocGetRootElement(this->doc);
this->root = this;
this->enums = 0;
return &this->public;
}
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