-
Notifications
You must be signed in to change notification settings - Fork 146
/
mir-htab.h
256 lines (234 loc) · 17.7 KB
/
mir-htab.h
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
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
/* This file is a part of MIR project.
Copyright (C) 2018-2024 Vladimir Makarov <[email protected]>.
*/
#ifndef MIR_HTAB_H
#define MIR_HTAB_H
#include "mir-alloc.h"
#include "mir-varr.h"
#ifdef __cplusplus
extern "C" {
#endif
#define FALSE 0
#define TRUE 1
#if !defined(VARR_ENABLE_CHECKING) && !defined(NDEBUG)
#define VARR_ENABLE_CHECKING
#endif
#ifndef HTAB_ENABLE_CHECKING
#define HTAB_ASSERT(EXPR, OP, T) ((void) (EXPR))
#else
static inline void mir_htab_assert_fail (const char *op, const char *var) {
fprintf (stderr, "wrong %s for %s\n", op, var);
assert (0);
}
#define HTAB_ASSERT(EXPR, OP, T) (void) ((EXPR) ? 0 : (mir_htab_assert_fail (OP, #T), 0))
#endif
#ifdef __GNUC__
#define MIR_HTAB_UNUSED __attribute__ ((unused))
#define MIR_HTAB_NO_RETURN __attribute__ ((noreturn))
#else
#define MIR_HTAB_UNUSED
#define MIR_HTAB_NO_RETURN
#endif
static inline void MIR_HTAB_NO_RETURN mir_htab_error (const char *message) {
#ifdef MIR_HTAB_ERROR
MIR_HTAB_ERROR (message);
assert (FALSE);
#else
fprintf (stderr, "%s\n", message);
#endif
exit (1);
}
/*---------------- Typed hash table -----------------------------*/
typedef unsigned htab_ind_t;
typedef unsigned htab_size_t;
typedef unsigned htab_hash_t;
#define HTAB_EMPTY_IND (~(htab_ind_t) 0)
#define HTAB_DELETED_IND (HTAB_EMPTY_IND - 1)
#define HTAB_DELETED_HASH 0
enum htab_action { HTAB_FIND, HTAB_INSERT, HTAB_REPLACE, HTAB_DELETE };
#define HTAB(T) HTAB_##T
#define HTAB_OP(T, OP) HTAB_##T##_##OP
#define HTAB_OP_DEF(T, OP) MIR_HTAB_UNUSED HTAB_OP (T, OP)
DEF_VARR (htab_ind_t)
#define HTAB_EL(T) HTAB_EL_##T
#define HTAB_T(T) \
typedef struct HTAB_EL (T) { \
htab_hash_t hash; \
T el; \
} HTAB_EL (T); \
DEF_VARR (HTAB_EL (T)) \
typedef struct { \
htab_size_t els_num, els_start, els_bound, collisions; \
void *arg; \
htab_hash_t (*hash_func) (T el, void *arg); \
int (*eq_func) (T el1, T el2, void *arg); \
void (*free_func) (T el, void *arg); \
VARR (HTAB_EL (T)) * els; \
VARR (htab_ind_t) * entries; \
} HTAB (T);
#define DEF_HTAB(T) \
HTAB_T (T) \
\
static inline void HTAB_OP_DEF (T, create) (HTAB (T) * *htab, MIR_alloc_t alloc, \
htab_size_t min_size, \
htab_hash_t (*hash_func) (T el, void *arg), \
int (*eq_func) (T el1, T el2, void *arg), \
void (*free_func) (T el, void *arg), void *arg) { \
HTAB (T) * ht; \
htab_size_t i, size; \
\
for (size = 2; min_size > size; size *= 2) \
; \
ht = MIR_malloc (alloc, sizeof (*ht)); \
if (ht == NULL) mir_htab_error ("htab: no memory"); \
VARR_CREATE (HTAB_EL (T), ht->els, alloc, size); \
VARR_TAILOR (HTAB_EL (T), ht->els, size); \
VARR_CREATE (htab_ind_t, ht->entries, alloc, 2 * size); \
ht->arg = arg; \
ht->hash_func = hash_func; \
ht->eq_func = eq_func; \
ht->free_func = free_func; \
ht->els_num = ht->els_start = ht->els_bound = ht->collisions = 0; \
for (i = 0; i < 2 * size; i++) VARR_PUSH (htab_ind_t, ht->entries, HTAB_EMPTY_IND); \
*htab = ht; \
} \
\
static inline void HTAB_OP_DEF (T, clear) (HTAB (T) * htab) { \
htab_ind_t *addr; \
htab_size_t i, size; \
HTAB_EL (T) * els_addr; \
void *arg; \
\
HTAB_ASSERT (htab != NULL, "clear", T); \
arg = htab->arg; \
if (htab->free_func != NULL) { \
els_addr = VARR_ADDR (HTAB_EL (T), htab->els); \
size = (htab_size_t) VARR_LENGTH (HTAB_EL (T), htab->els); \
for (i = 0; i < htab->els_bound; i++) \
if (els_addr[i].hash != HTAB_DELETED_HASH) htab->free_func (els_addr[i].el, arg); \
} \
htab->els_num = htab->els_start = htab->els_bound = 0; \
addr = VARR_ADDR (htab_ind_t, htab->entries); \
size = (htab_size_t) VARR_LENGTH (htab_ind_t, htab->entries); \
for (i = 0; i < size; i++) addr[i] = HTAB_EMPTY_IND; \
} \
\
static inline void HTAB_OP_DEF (T, destroy) (HTAB (T) * *htab) { \
HTAB_ASSERT (*htab != NULL, "destroy", T); \
if ((*htab)->free_func != NULL) HTAB_OP (T, clear) (*htab); \
MIR_alloc_t alloc = (*htab)->els->alloc; \
VARR_DESTROY (HTAB_EL (T), (*htab)->els); \
VARR_DESTROY (htab_ind_t, (*htab)->entries); \
MIR_free (alloc, *htab); \
*htab = NULL; \
} \
\
static inline int HTAB_OP_DEF (T, do) (HTAB (T) * htab, T el, enum htab_action action, \
T * res) { \
htab_ind_t ind, el_ind, *entry, *first_deleted_entry = NULL; \
htab_hash_t hash, peterb; \
htab_size_t els_size, size, mask, start, bound, i; \
htab_ind_t *addr; \
HTAB_EL (T) * els_addr; \
void *arg; \
\
HTAB_ASSERT (htab != NULL, "do htab", T); \
size = (htab_size_t) VARR_LENGTH (htab_ind_t, htab->entries); \
els_size = (htab_size_t) VARR_LENGTH (HTAB_EL (T), htab->els); \
arg = htab->arg; \
HTAB_ASSERT (els_size * 2 == size, "do size", T); \
if ((action == HTAB_INSERT || action == HTAB_REPLACE) && htab->els_bound == els_size) { \
size *= 2; \
VARR_TAILOR (htab_ind_t, htab->entries, size); \
addr = VARR_ADDR (htab_ind_t, htab->entries); \
for (i = 0; i < size; i++) addr[i] = HTAB_EMPTY_IND; \
VARR_TAILOR (HTAB_EL (T), htab->els, els_size * 2); \
els_addr = VARR_ADDR (HTAB_EL (T), htab->els); \
start = htab->els_start; \
bound = htab->els_bound; \
htab->els_start = htab->els_bound = htab->els_num = 0; \
for (i = start; i < bound; i++) \
if (els_addr[i].hash != HTAB_DELETED_HASH) { \
HTAB_OP (T, do) (htab, els_addr[i].el, HTAB_INSERT, res); \
HTAB_ASSERT ((*htab->eq_func) (*res, els_addr[i].el, arg), "do expand", T); \
} \
HTAB_ASSERT (bound - start >= htab->els_bound, "do bound", T); \
} \
mask = size - 1; \
hash = (*htab->hash_func) (el, arg); \
if (hash == HTAB_DELETED_HASH) hash += 1; \
peterb = hash; \
ind = hash & mask; \
addr = VARR_ADDR (htab_ind_t, htab->entries); \
els_addr = VARR_ADDR (HTAB_EL (T), htab->els); \
for (;; htab->collisions++) { \
entry = addr + ind; \
el_ind = *entry; \
if (el_ind != HTAB_EMPTY_IND) { \
if (el_ind == HTAB_DELETED_IND) { \
first_deleted_entry = entry; \
} else if (els_addr[el_ind].hash == hash \
&& (*htab->eq_func) (els_addr[el_ind].el, el, arg)) { \
if (action == HTAB_REPLACE) { \
if (htab->free_func != NULL) htab->free_func (els_addr[el_ind].el, arg); \
els_addr[el_ind].el = el; \
} \
if (action != HTAB_DELETE) { \
*res = els_addr[el_ind].el; \
} else { \
htab->els_num--; \
*entry = HTAB_DELETED_IND; \
if (htab->free_func != NULL) htab->free_func (els_addr[el_ind].el, arg); \
els_addr[el_ind].hash = HTAB_DELETED_HASH; \
} \
return TRUE; \
} \
} else { \
if (action == HTAB_INSERT || action == HTAB_REPLACE) { \
htab->els_num++; \
if (first_deleted_entry != NULL) entry = first_deleted_entry; \
els_addr[htab->els_bound].hash = hash; \
els_addr[htab->els_bound].el = el; \
*entry = htab->els_bound++; \
*res = el; \
} \
return FALSE; \
} \
peterb >>= 11; \
ind = (5 * ind + peterb + 1) & mask; \
} \
} \
\
static inline htab_size_t HTAB_OP_DEF (T, els_num) (HTAB (T) * htab) { \
HTAB_ASSERT (htab != NULL, "els_num", T); \
return htab->els_num; \
} \
static inline htab_size_t HTAB_OP_DEF (T, collisions) (HTAB (T) * htab) { \
HTAB_ASSERT (htab != NULL, "collisions", T); \
return htab->collisions; \
} \
\
static inline void HTAB_OP_DEF (T, foreach_elem) (HTAB (T) * htab, \
void (*func) (T el, void *arg), void *arg) { \
htab_size_t i; \
HTAB_EL (T) * els_addr; \
\
HTAB_ASSERT (htab != NULL, "foreach_elem", T); \
els_addr = VARR_ADDR (HTAB_EL (T), htab->els); \
for (i = 0; i < htab->els_bound; i++) \
if (els_addr[i].hash != HTAB_DELETED_HASH) func (els_addr[i].el, arg); \
}
#define HTAB_CREATE(T, V, M, S, H, EQ, A) (HTAB_OP (T, create) (&(V), M, S, H, EQ, NULL, A))
#define HTAB_CREATE_WITH_FREE_FUNC(T, V, M, S, H, EQ, F, A) \
(HTAB_OP (T, create) (&(V), M, S, H, EQ, F, A))
#define HTAB_CLEAR(T, V) (HTAB_OP (T, clear) (V))
#define HTAB_DESTROY(T, V) (HTAB_OP (T, destroy) (&(V)))
/* It returns TRUE if the element existed in the table. */
#define HTAB_DO(T, V, EL, A, TAB_EL) (HTAB_OP (T, do) (V, EL, A, &(TAB_EL)))
#define HTAB_ELS_NUM(T, V) (HTAB_OP (T, els_num) (V))
#define HTAB_COLLISIONS(T, V) (HTAB_OP (T, collisions) (V))
#define HTAB_FOREACH_ELEM(T, V, F, A) (HTAB_OP (T, foreach_elem) (V, F, A))
#ifdef __cplusplus
}
#endif
#endif /* #ifndef MIR_HTAB_H */