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)))