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03467c88 | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
60918275 | 2 | |
c2f1db8f | 3 | #pragma once |
60918275 | 4 | |
a7334b09 LP |
5 | /*** |
6 | This file is part of systemd. | |
7 | ||
8 | Copyright 2010 Lennart Poettering | |
9 | ||
10 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
11 | under the terms of the GNU Lesser General Public License as published by |
12 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
13 | (at your option) any later version. |
14 | ||
15 | systemd is distributed in the hope that it will be useful, but | |
16 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 18 | Lesser General Public License for more details. |
a7334b09 | 19 | |
5430f7f2 | 20 | You should have received a copy of the GNU Lesser General Public License |
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21 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
22 | ***/ | |
23 | ||
60918275 LP |
24 | #include <stdbool.h> |
25 | ||
26 | /* Pretty straightforward hash table implementation. As a minor | |
27 | * optimization a NULL hashmap object will be treated as empty hashmap | |
28 | * for all read operations. That way it is not necessary to | |
29 | * instantiate an object for each Hashmap use. */ | |
30 | ||
31 | typedef struct Hashmap Hashmap; | |
034c6ed7 LP |
32 | typedef struct _IteratorStruct _IteratorStruct; |
33 | typedef _IteratorStruct* Iterator; | |
34 | ||
35 | #define ITERATOR_FIRST ((Iterator) 0) | |
36 | #define ITERATOR_LAST ((Iterator) -1) | |
60918275 LP |
37 | |
38 | typedef unsigned (*hash_func_t)(const void *p); | |
39 | typedef int (*compare_func_t)(const void *a, const void *b); | |
40 | ||
41 | unsigned string_hash_func(const void *p); | |
42 | int string_compare_func(const void *a, const void *b); | |
43 | ||
44 | unsigned trivial_hash_func(const void *p); | |
45 | int trivial_compare_func(const void *a, const void *b); | |
46 | ||
47 | Hashmap *hashmap_new(hash_func_t hash_func, compare_func_t compare_func); | |
91cdde8a | 48 | void hashmap_free(Hashmap *h); |
449ddb2d | 49 | void hashmap_free_free(Hashmap *h); |
91cdde8a | 50 | Hashmap *hashmap_copy(Hashmap *h); |
034c6ed7 | 51 | int hashmap_ensure_allocated(Hashmap **h, hash_func_t hash_func, compare_func_t compare_func); |
60918275 LP |
52 | |
53 | int hashmap_put(Hashmap *h, const void *key, void *value); | |
3158713e | 54 | int hashmap_replace(Hashmap *h, const void *key, void *value); |
60918275 | 55 | void* hashmap_get(Hashmap *h, const void *key); |
96342de6 | 56 | bool hashmap_contains(Hashmap *h, const void *key); |
60918275 | 57 | void* hashmap_remove(Hashmap *h, const void *key); |
3158713e | 58 | void* hashmap_remove_value(Hashmap *h, const void *key, void *value); |
101d8e63 | 59 | int hashmap_remove_and_put(Hashmap *h, const void *old_key, const void *new_key, void *value); |
8fe914ec | 60 | int hashmap_remove_and_replace(Hashmap *h, const void *old_key, const void *new_key, void *value); |
60918275 | 61 | |
91cdde8a | 62 | int hashmap_merge(Hashmap *h, Hashmap *other); |
101d8e63 LP |
63 | void hashmap_move(Hashmap *h, Hashmap *other); |
64 | int hashmap_move_one(Hashmap *h, Hashmap *other, const void *key); | |
91cdde8a | 65 | |
60918275 LP |
66 | unsigned hashmap_size(Hashmap *h); |
67 | bool hashmap_isempty(Hashmap *h); | |
68 | ||
034c6ed7 LP |
69 | void *hashmap_iterate(Hashmap *h, Iterator *i, const void **key); |
70 | void *hashmap_iterate_backwards(Hashmap *h, Iterator *i, const void **key); | |
71 | void *hashmap_iterate_skip(Hashmap *h, const void *key, Iterator *i); | |
60918275 | 72 | |
11dd41ce | 73 | void hashmap_clear(Hashmap *h); |
9946996c LP |
74 | void hashmap_clear_free(Hashmap *h); |
75 | ||
60918275 | 76 | void *hashmap_steal_first(Hashmap *h); |
22be093f | 77 | void *hashmap_steal_first_key(Hashmap *h); |
60918275 | 78 | void* hashmap_first(Hashmap *h); |
2e4a6ff4 | 79 | void* hashmap_first_key(Hashmap *h); |
60918275 LP |
80 | void* hashmap_last(Hashmap *h); |
81 | ||
3c1668da LP |
82 | void *hashmap_next(Hashmap *h, const void *key); |
83 | ||
db1413d7 KS |
84 | char **hashmap_get_strv(Hashmap *h); |
85 | ||
034c6ed7 | 86 | #define HASHMAP_FOREACH(e, h, i) \ |
aed5e44d | 87 | for ((i) = ITERATOR_FIRST, (e) = hashmap_iterate((h), &(i), NULL); (e); (e) = hashmap_iterate((h), &(i), NULL)) |
60918275 | 88 | |
034c6ed7 | 89 | #define HASHMAP_FOREACH_KEY(e, k, h, i) \ |
aed5e44d | 90 | for ((i) = ITERATOR_FIRST, (e) = hashmap_iterate((h), &(i), (const void**) &(k)); (e); (e) = hashmap_iterate((h), &(i), (const void**) &(k))) |
11dd41ce | 91 | |
034c6ed7 | 92 | #define HASHMAP_FOREACH_BACKWARDS(e, h, i) \ |
aed5e44d | 93 | for ((i) = ITERATOR_LAST, (e) = hashmap_iterate_backwards((h), &(i), NULL); (e); (e) = hashmap_iterate_backwards((h), &(i), NULL)) |