Merge branch 'ma/mailing-list-address-in-git-help'
[git] / oidmap.c
1 #include "cache.h"
2 #include "oidmap.h"
3
4 static int oidmap_neq(const void *hashmap_cmp_fn_data,
5                       const void *entry, const void *entry_or_key,
6                       const void *keydata)
7 {
8         const struct oidmap_entry *entry_ = entry;
9         if (keydata)
10                 return !oideq(&entry_->oid, (const struct object_id *) keydata);
11         return !oideq(&entry_->oid,
12                       &((const struct oidmap_entry *) entry_or_key)->oid);
13 }
14
15 static int hash(const struct object_id *oid)
16 {
17         int hash;
18         memcpy(&hash, oid->hash, sizeof(hash));
19         return hash;
20 }
21
22 void oidmap_init(struct oidmap *map, size_t initial_size)
23 {
24         hashmap_init(&map->map, oidmap_neq, NULL, initial_size);
25 }
26
27 void oidmap_free(struct oidmap *map, int free_entries)
28 {
29         if (!map)
30                 return;
31         hashmap_free(&map->map, free_entries);
32 }
33
34 void *oidmap_get(const struct oidmap *map, const struct object_id *key)
35 {
36         if (!map->map.cmpfn)
37                 return NULL;
38
39         return hashmap_get_from_hash(&map->map, hash(key), key);
40 }
41
42 void *oidmap_remove(struct oidmap *map, const struct object_id *key)
43 {
44         struct hashmap_entry entry;
45
46         if (!map->map.cmpfn)
47                 oidmap_init(map, 0);
48
49         hashmap_entry_init(&entry, hash(key));
50         return hashmap_remove(&map->map, &entry, key);
51 }
52
53 void *oidmap_put(struct oidmap *map, void *entry)
54 {
55         struct oidmap_entry *to_put = entry;
56
57         if (!map->map.cmpfn)
58                 oidmap_init(map, 0);
59
60         hashmap_entry_init(&to_put->internal_entry, hash(&to_put->oid));
61         return hashmap_put(&map->map, to_put);
62 }