/*******************************************************************************
 *
 * Copyright (c) 2000-2003 Intel Corporation
 * All rights reserved.
 * Copyright (c) 2012 France Telecom All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * - Neither name of Intel Corporation nor the names of its contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 ******************************************************************************/

/*!
 * \file
 */

#include "ixml.h"
#include "ixmlparser.h"

#include <assert.h>
#include <stdlib.h>
#include <string.h>

void ixmlNodeList_init(IXML_NodeList *nList)
{
	assert(nList);

	memset(nList, 0, sizeof(IXML_NodeList));
}

IXML_Node *ixmlNodeList_item(IXML_NodeList *nList, unsigned long index)
{
	IXML_NodeList *next;
	unsigned int i;

	/* if the list ptr is NULL */
	if (!nList) {
		return NULL;
	}
	/* if index is more than list length */
	if (index > ixmlNodeList_length(nList) - 1lu) {
		return NULL;
	}

	next = nList;
	for (i = 0u; i < index && next; ++i) {
		next = next->next;
	}

	if (!next) {
		return NULL;
	}

	return next->nodeItem;
}

int ixmlNodeList_addToNodeList(IXML_NodeList **nList, IXML_Node *add)
{
	IXML_NodeList *traverse = NULL;
	IXML_NodeList *p = NULL;
	IXML_NodeList *newListItem;

	assert(add);

	if (!add) {
		return IXML_FAILED;
	}

	if (!*nList) {
		/* nodelist is empty */
		*nList = (IXML_NodeList *)malloc(sizeof(IXML_NodeList));
		if (!*nList) {
			return IXML_INSUFFICIENT_MEMORY;
		}

		ixmlNodeList_init(*nList);
	}

	if (!(*nList)->nodeItem) {
		(*nList)->nodeItem = add;
	} else {
		traverse = *nList;
		while (traverse) {
			p = traverse;
			traverse = traverse->next;
		}

		newListItem = (IXML_NodeList *)malloc(sizeof(IXML_NodeList));
		if (!newListItem) {
			return IXML_INSUFFICIENT_MEMORY;
		}
		p->next = newListItem;
		newListItem->nodeItem = add;
		newListItem->next = NULL;
	}

	return IXML_SUCCESS;
}

unsigned long ixmlNodeList_length(IXML_NodeList *nList)
{
	IXML_NodeList *list;
	unsigned long length = 0lu;

	list = nList;
	while (list) {
		++length;
		list = list->next;
	}

	return length;
}

void ixmlNodeList_free(IXML_NodeList *nList)
{
	IXML_NodeList *next;

	while (nList) {
		next = nList->next;
		free(nList);
		nList = next;
	}
}
