src/hashtable.h

   1 #ifndef INCLUDE_hashtable_h__
   2 #define INCLUDE_hashtable_h__
   3
   4 #include "git2/common.h"
   5 #include "git2/oid.h"
   6 #include "git2/odb.h"
   7
   8 #define GIT_HASHTABLE_HASHES 3
   9
  10 typedef uint32_t (*git_hash_ptr)(const void *, int hash_id);
  11 typedef int (*git_hash_keyeq_ptr)(const void *key_a, const void *key_b);
  12
  13 struct git_hashtable_node {
  14         const void *key;
  15         void *value;
  16 };
  17
  18 struct git_hashtable {
  19         struct git_hashtable_node *nodes;
  20
  21         size_t size_mask;
  22         size_t size;
  23         size_t key_count;
  24
  25         int is_resizing;
  26
  27         git_hash_ptr hash;
  28         git_hash_keyeq_ptr key_equal;
  29 };
  30
  31 typedef struct git_hashtable_node git_hashtable_node;
  32 typedef struct git_hashtable git_hashtable;
  33
  34 git_hashtable *git_hashtable_alloc(size_t min_size,
  35                 git_hash_ptr hash,
  36                 git_hash_keyeq_ptr key_eq);
  37 void *git_hashtable_lookup(git_hashtable *h, const void *key);
  38 int git_hashtable_remove(git_hashtable *table, const void *key);
  39 void git_hashtable_free(git_hashtable *h);
  40 void git_hashtable_clear(git_hashtable *h);
  41 int git_hashtable_merge(git_hashtable *self, git_hashtable *other);
  42
  43 int git_hashtable_insert2(git_hashtable *h, const void *key, void *value, void **old_value);
  44
  45 GIT_INLINE(int) git_hashtable_insert(git_hashtable *h, const void *key, void *value)
  46 {
  47         void *_unused;
  48         return git_hashtable_insert2(h, key, value, &_unused);
  49 }
  50
  51 #define git_hashtable_node_at(nodes, pos) ((git_hashtable_node *)(&nodes[pos]))
  52
  53 #define GIT_HASHTABLE_FOREACH(self, pkey, pvalue, code) {\
  54         git_hashtable *_self = (self);\
  55         git_hashtable_node *_nodes = _self->nodes;\
  56         unsigned int _i, _size = _self->size;\
  57         for (_i = 0; _i < _size; _i ++) {\
  58                 git_hashtable_node *_node = git_hashtable_node_at(_nodes, _i);\
  59                 if (_node->key)\
  60                 {\
  61                         pkey = _node->key;\
  62                         pvalue = _node->value;\
  63                         code;\
  64                 }\
  65         }\
  66 }
  67
  68 #define GIT_HASHTABLE_FOREACH_DELETE() {\
  69         _node->key = NULL; _node->value = NULL; _self->key_count--;\
  70 }
  71
  72
  73 #endif