5 list.h -- header file for list.c
6 Copyright (C) 2000-2005 Ivo Timmermans
7 2000-2012 Guus Sliepen <guus@tinc-vpn.org>
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License along
20 with this program; if not, write to the Free Software Foundation, Inc.,
21 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24 typedef struct list_node_t {
25 struct list_node_t *prev;
26 struct list_node_t *next;
33 typedef void (*list_action_t)(const void *data);
34 typedef void (*list_action_node_t)(const list_node_t *node);
36 typedef struct list_t {
46 /* (De)constructors */
48 extern list_t *list_alloc(list_action_t delete) __attribute__((__malloc__));
49 extern void list_free(list_t *list);
50 extern list_node_t *list_alloc_node(void);
51 extern void list_free_node(list_t *list, list_node_t *node);
53 /* Insertion and deletion */
55 extern list_node_t *list_insert_head(list_t *list, void *data);
56 extern list_node_t *list_insert_tail(list_t *list, void *data);
57 extern list_node_t *list_insert_after(list_t *list, list_node_t *node, void *data);
58 extern list_node_t *list_insert_before(list_t *list, list_node_t *node, void *data);
60 extern void list_delete(list_t *list, const void *data);
62 extern void list_unlink_node(list_t *list, list_node_t *node);
63 extern void list_delete_node(list_t *list, list_node_t *node);
65 extern void list_delete_head(list_t *list);
66 extern void list_delete_tail(list_t *list);
68 /* Head/tail lookup */
70 extern void *list_get_head(list_t *list);
71 extern void *list_get_tail(list_t *list);
73 /* Fast list deletion */
75 extern void list_delete_list(list_t *list);
79 extern void list_foreach(list_t *list, list_action_t action);
80 extern void list_foreach_node(list_t *list, list_action_node_t action);
85 CAUTION: while this construct supports deleting the current item,
86 it does *not* support deleting *other* nodes while iterating on the list.
88 #define list_each(type, item, list) (type *item = (type *)1; item; item = NULL) for(list_node_t *node = (list)->head, *next; item = node ? node->data : NULL, next = node ? node->next : NULL, node; node = next)