1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141
|
/* $Id: hash.h,v 1.6 2003/09/24 18:48:59 ukai Exp $ */
#ifndef HASH_H
#define HASH_H
/* hash table */
#define defhash(keytype,type,sym) \
typedef struct HashItem_##sym { \
keytype key; \
type value; \
struct HashItem_##sym *next; \
} HashItem_##sym; \
typedef struct Hash_##sym { \
int size; \
struct HashItem_##sym **tab; \
} Hash_##sym; \
extern Hash_##sym *newHash_##sym(int size); \
extern void putHash_##sym(Hash_##sym *t, keytype key, type value); \
extern type getHash_##sym(Hash_##sym *t, keytype key, type failval);
defhash(char *, int, si)
defhash(char *, char *, ss)
defhash(char *, void *, sv)
defhash(int, void *, iv)
#define defhashfunc(keytype,type,sym) \
Hash_##sym * \
newHash_##sym(int size)\
{\
struct Hash_##sym *hash;\
int i;\
\
hash = (Hash_##sym*)GC_malloc(sizeof(Hash_##sym));\
hash->size = size;\
hash->tab = (HashItem_##sym**)GC_malloc(size*sizeof(HashItem_##sym*));\
for (i = 0; i < size; i++)\
hash->tab[i] = NULL;\
return hash;\
}\
\
static HashItem_##sym* \
lookupHash_##sym(Hash_##sym *t, keytype key, int *hashval_return)\
{\
HashItem_##sym *hi;\
\
*hashval_return = hashfunc(key)%t->size;\
for (hi = t->tab[*hashval_return]; hi != NULL; hi = hi->next) {\
if (keycomp(hi->key,key))\
return hi;\
}\
return NULL;\
}\
\
void \
putHash_##sym(Hash_##sym *t, keytype key, type value)\
{\
int h;\
HashItem_##sym *hi;\
\
hi = lookupHash_##sym(t,key,&h);\
if (hi) {\
hi->value = value;\
return;\
}\
\
hi = (HashItem_##sym*)GC_malloc(sizeof(HashItem_##sym));\
hi->key = key;\
hi->value = value;\
hi->next = t->tab[h];\
t->tab[h] = hi;\
}\
\
type \
getHash_##sym(Hash_##sym *t, keytype key, type failval)\
{\
int h;\
HashItem_##sym *hi;\
\
hi = lookupHash_##sym(t,key,&h);\
if (hi == NULL)\
return failval;\
return hi->value;\
}
#define defhashfunc_i(keytype,type,sym) \
Hash_##sym * \
newHash_##sym(int size)\
{\
struct Hash_##sym *hash;\
int i;\
\
hash = (Hash_##sym*)GC_malloc(sizeof(Hash_##sym));\
hash->size = size;\
hash->tab = (HashItem_##sym**)GC_malloc(size*sizeof(HashItem_##sym*));\
for (i = 0; i < size; i++)\
hash->tab[i] = NULL;\
return hash;\
}\
\
static HashItem_##sym* \
lookupHash_##sym(Hash_##sym *t, keytype key, int *hashval_return)\
{\
HashItem_##sym *hi;\
\
*hashval_return = key%t->size;\
for (hi = t->tab[*hashval_return]; hi != NULL; hi = hi->next) {\
if (hi->key == key)\
return hi;\
}\
return NULL;\
}\
\
void \
putHash_##sym(Hash_##sym *t, keytype key, type value)\
{\
int h;\
HashItem_##sym *hi;\
\
hi = lookupHash_##sym(t,key,&h);\
if (hi) {\
hi->value = value;\
return;\
}\
\
hi = (HashItem_##sym*)GC_malloc(sizeof(HashItem_##sym));\
hi->key = key;\
hi->value = value;\
hi->next = t->tab[h];\
t->tab[h] = hi;\
}\
\
type \
getHash_##sym(Hash_##sym *t, keytype key, type failval)\
{\
int h;\
HashItem_##sym *hi;\
\
hi = lookupHash_##sym(t,key,&h);\
if (hi == NULL)\
return failval;\
return hi->value;\
}
#endif /* not HASH_H */
|