1/*
2 * (C) 2005-2012 by Pablo Neira Ayuso <pablo@netfilter.org>
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 */
9
10#include <stdio.h>
11#include <stdlib.h>
12#include <string.h>
13#include <errno.h>
14
15#include "stack.h"
16
17struct stack_item *
18stack_item_alloc(int type, size_t data_len)
19{
20	struct stack_item *e;
21
22	e = calloc(1, sizeof(struct stack_item) + data_len);
23	if (e == NULL)
24		return NULL;
25
26	e->data_len = data_len;
27	e->type = type;
28
29	return e;
30}
31
32void stack_item_free(struct stack_item *e)
33{
34	free(e);
35}
36
37void stack_item_push(struct stack *s, struct stack_item *e)
38{
39	list_add(&e->head, &s->list);
40}
41
42struct stack_item *stack_item_pop(struct stack *s, int type)
43{
44	struct stack_item *cur, *tmp, *found = NULL;
45
46	list_for_each_entry_safe(cur, tmp, &s->list, head) {
47		if (cur->type != type && type != -1)
48			continue;
49
50		list_del(&cur->head);
51		found = cur;
52		break;
53	}
54
55	return found;
56}
57