1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
7 This file is part of systemd.
9 Copyright 2010 Lennart Poettering
11 systemd is free software; you can redistribute it and/or modify it
12 under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
16 systemd is distributed in the hope that it will be useful, but
17 WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 /* Pretty straightforward set implementation. Internally based on the
26 * hashmap. That means that as a minor optimization a NULL set
27 * object will be treated as empty set for all read
28 * operations. That way it is not necessary to instantiate an object
29 * for each set use. */
33 typedef struct Set Set;
35 Set *set_new(hash_func_t hash_func, compare_func_t compare_func);
36 void set_free(Set* s);
37 Set* set_copy(Set *s);
38 int set_ensure_allocated(Set **s, hash_func_t hash_func, compare_func_t compare_func);
40 int set_put(Set *s, void *value);
41 int set_replace(Set *s, void *value);
42 void *set_get(Set *s, void *value);
43 void *set_remove(Set *s, void *value);
44 int set_remove_and_put(Set *s, void *old_value, void *new_value);
46 int set_merge(Set *s, Set *other);
47 void set_move(Set *s, Set *other);
48 int set_move_one(Set *s, Set *other, void *value);
50 unsigned set_size(Set *s);
51 bool set_isempty(Set *s);
53 void *set_iterate(Set *s, Iterator *i);
54 void *set_iterate_backwards(Set *s, Iterator *i);
55 void *set_iterate_skip(Set *s, void *value, Iterator *i);
57 void set_clear(Set *s);
58 void *set_steal_first(Set *s);
59 void* set_first(Set *s);
60 void* set_last(Set *s);
62 #define SET_FOREACH(e, s, i) \
63 for ((i) = ITERATOR_FIRST, (e) = set_iterate((s), &(i)); (e); (e) = set_iterate((s), &(i)))
65 #define SET_FOREACH_BACKWARDS(e, s, i) \
66 for ((i) = ITERATOR_LAST, (e) = set_iterate_backwards((s), &(i)); (e); (e) = set_iterate_backwards((s), &(i)))