common/list.c

/*
 *
 *  BlueZ - Bluetooth protocol stack for Linux
 *
 *  Copyright (C) 2004-2006  Marcel Holtmann <marcel@holtmann.org>
 *  Copyright (C) 2005-2006  Johan Hedberg <johan.hedberg@nokia.com>
 *
 *
 *  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.
 *
 *  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.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <errno.h>
#include <malloc.h>

#include "list.h"

struct slist *slist_append(struct slist *list, void *data)
{
	struct slist *entry, *tail;

	entry = malloc(sizeof(struct slist));
	/* FIXME: this currently just silently fails */
	if (!entry)
		return list;

	entry->data = data;
	entry->next = NULL;

	if (!list)
		return entry;

	/* Find the end of the list */
	for (tail = list; tail->next; tail = tail->next);

	tail->next = entry;

	return list;
}

struct slist *slist_remove(struct slist *list, void *data)
{
	struct slist *l, *next, *prev = NULL, *match = NULL;

	if (!list)
		return NULL;

	for (l = list; l != NULL; l = l->next) {
		if (l->data == data) {
			match = l;
			break;
		}
		prev = l;
	}

	if (!match)
		return list;

	next = match->next;

	free(match);

	/* If the head was removed, return the next element */
	if (!prev)
		return next;

	prev->next = next;

	return list;
}

struct slist *slist_find(struct slist *list, const void *data,
			cmp_func_t cmp_func)
{
	struct slist *l;

	for (l = list; l != NULL; l = l->next) {
		if (!cmp_func(l->data, data))
			return l;
	}

	return NULL;
}

void slist_foreach(struct slist *list, slist_func_t func, void *user_data)
{
	while (list) {
		struct slist *next = list->next;
		func(list->data, user_data);
		list = next;
	}
}

void slist_free(struct slist *list)
{
	struct slist *l, *next;

	for (l = list; l != NULL; l = next) {
		next = l->next;
		free(l);
	}
}