lvm2/lib/datastruct/str_list.c

/*
 * Copyright (C) 2003-2004 Sistina Software, Inc. All rights reserved.
 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
 *
 * This file is part of LVM2.
 *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU Lesser General Public License v.2.1.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "lib.h"
#include "str_list.h"

struct list *str_list_create(struct dm_pool *mem)
{
	struct list *sl;

	if (!(sl = dm_pool_alloc(mem, sizeof(struct list)))) {
		stack;
		return NULL;
	}

	list_init(sl);

	return sl;
}

int str_list_add(struct dm_pool *mem, struct list *sll, const char *str)
{
	struct str_list *sln;

	if (!str) {
		stack;
		return 0;
	}

	/* Already in list? */
	if (str_list_match_item(sll, str))
		return 1;

	if (!(sln = dm_pool_alloc(mem, sizeof(*sln)))) {
		stack;
		return 0;
	}

	sln->str = str;
	list_add(sll, &sln->list);

	return 1;
}

int str_list_del(struct list *sll, const char *str)
{
	struct list *slh, *slht;

	list_iterate_safe(slh, slht, sll) {
		if (!strcmp(str, list_item(slh, struct str_list)->str))
			 list_del(slh);
	}

	return 1;
}

int str_list_dup(struct dm_pool *mem, struct list *sllnew,
		 const struct list *sllold)
{
	struct str_list *sl;

	list_init(sllnew);

	list_iterate_items(sl, sllold) {
		if (!str_list_add(mem, sllnew, strdup(sl->str))) {
			stack;
			return 0;
		}
	}

	return 1;
}

/*
 * Is item on list?
 */
int str_list_match_item(const struct list *sll, const char *str)
{
	struct str_list *sl;

	list_iterate_items(sl, sll)
	    if (!strcmp(str, sl->str))
		return 1;

	return 0;
}

/*
 * Is at least one item on both lists?
 */
int str_list_match_list(const struct list *sll, const struct list *sll2)
{
	struct str_list *sl;

	list_iterate_items(sl, sll)
	    if (str_list_match_item(sll2, sl->str))
		return 1;

	return 0;
}

/*
 * Do both lists contain the same set of items?
 */
int str_list_lists_equal(const struct list *sll, const struct list *sll2)
{
	struct str_list *sl;

	if (list_size(sll) != list_size(sll2))
		return 0;

	list_iterate_items(sl, sll)
	    if (!str_list_match_item(sll2, sl->str))
		return 0;

	return 1;
}