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hash.h
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1 #ifndef MDVI_HASH
2 #define MDVI_HASH
3 
4 /* Hash tables */
5 
6 
7 typedef struct _DviHashBucket DviHashBucket;
8 typedef struct _DviHashTable DviHashTable;
9 
10 /*
11  * Hash tables
12  */
13 
14 typedef Uchar *DviHashKey;
15 #define MDVI_KEY(x) ((DviHashKey)(x))
16 
17 typedef Ulong (*DviHashFunc) __PROTO((DviHashKey key));
18 typedef int (*DviHashComp) __PROTO((DviHashKey key1, DviHashKey key2));
19 typedef void (*DviHashFree) __PROTO((DviHashKey key, void *data));
20 
21 
22 struct _DviHashTable {
23  DviHashBucket **buckets;
24  int nbucks;
25  int nkeys;
26  DviHashFunc hash_func;
27  DviHashComp hash_comp;
28  DviHashFree hash_free;
29 };
30 #define MDVI_EMPTY_HASH_TABLE {NULL, 0, 0, NULL, NULL, NULL}
31 
32 #define MDVI_HASH_REPLACE 0
33 #define MDVI_HASH_UNIQUE 1
34 #define MDVI_HASH_UNCHECKED 2
35 
36 extern void mdvi_hash_init __PROTO((DviHashTable *));
37 extern void mdvi_hash_create __PROTO((DviHashTable *, int));
38 extern int mdvi_hash_add __PROTO((DviHashTable *, DviHashKey, void *, int));
39 extern int mdvi_hash_destroy_key __PROTO((DviHashTable *, DviHashKey));
40 extern void mdvi_hash_reset __PROTO((DviHashTable *, int));
41 extern void *mdvi_hash_lookup __PROTO((DviHashTable *, DviHashKey));
42 extern void *mdvi_hash_remove __PROTO((DviHashTable *, DviHashKey));
43 extern void *mdvi_hash_remove_ptr __PROTO((DviHashTable *, DviHashKey));
44 
45 #define mdvi_hash_flush(h) mdvi_hash_reset((h), 1)
46 #define mdvi_hash_destroy(h) mdvi_hash_reset((h), 0)
47 
48 #endif
49