oidmap.c

   1 #include "cache.h"
   2 #include "oidmap.h"
   3
   4 static int cmpfn(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 oidcmp(&entry_->oid, (const struct object_id *) keydata);
  11         return oidcmp(&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, cmpfn, 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 }