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
|
// SPDX-License-Identifier: LGPL-3.0-or-later
#include "impl.h"
int hkvs_table_new(hkvs_table **pt, hkvs_io *io, char *param) {
size_t elt_size = hkvs_read_u16(param + HKVS_PARAM_TABLE_ELTSZ);
if(!elt_size) {
*pt = NULL;
return 0;
}
size_t key_size = hkvs_read_u8(param + HKVS_PARAM_TABLE_KEYSZ);
if(key_size > elt_size) return -EBADMSG;
hkvs_table *t = malloc(sizeof(hkvs_table));
if(!t) return -ENOMEM;
int r = hkvs_slab_init(&t->slab, io, param, elt_size);
if(r < 0) goto fail_free;
uint64_t ix_fi = hkvs_read_u64(param + HKVS_PARAM_TABLE_IXFI);
if(ix_fi != 0) {
uint8_t ix_bits = hkvs_read_u8(param + HKVS_PARAM_TABLE_IXBIT);
if(ix_bits < 4 || ix_bits > 59) goto ix_unlink;
r = io->open(io, ix_fi, &t->ix, &t->ix_size);
if(r < 0) {
if(r == -ENOENT) goto ix_dropped;
return r;
}
if(t->ix_size < HKVS_IX_SIZE(ix_bits)) {
goto ix_build;
}
}
ret:
*pt = t;
return 1;
ix_unlink:
io->unlink(io, ix_fi);
ix_dropped:
hkvs_write_u64(param + HKVS_PARAM_TABLE_IXFI, 0);
ix_build:
r = hkvs_ix_build(t, io);
if(r < 0) goto fail_close;
goto ret;
fail_close:
hkvs_slab_destroy(&t->slab, io);
fail_free:
free(t);
return r;
}
hkvs_table *hkvs_table_at(hkvs *c, size_t i) {
size_t n_tables = c->n_tables;
if(i >= n_tables) return NULL;
hkvs_table **tables = c->tables;
for(size_t j = 0; j < n_tables; j++) {
hkvs_table *t = tables[j];
if(!t) continue;
if(!i--) return t;
}
return NULL;
}
uint32_t hkvs_table_id(hkvs *c, hkvs_table *t) {
(void)c;
return hkvs_table__id(t);
}
size_t hkvs_table_key_size(hkvs *c, hkvs_table *t) {
(void)c;
return hkvs_table__key_size(t);
}
int hkvs_table_delete(hkvs *c, uint32_t id) {
hkvs_table **tables = c->tables;
size_t n_tables = c->n_tables;
for(size_t i = 0; i < n_tables; i++) {
hkvs_table *t = tables[i];
if(!t) continue;
if(hkvs_table_id(c, t) == id) {
tables[i] = NULL;
char *param = t->slab.param;
hkvs_io *io = c->io;
hkvs_table_free(t, io);
uint64_t fi = hkvs_read_u64(param + HKVS_PARAM_SLAB_FI);
uint64_t ix_fi = hkvs_read_u64(param + HKVS_PARAM_TABLE_IXFI);
memset(param, 0, HKVS_PSIZE_TABLE);
assert(fi && ix_fi);
io->unlink(io, ix_fi);
io->unlink(io, fi);
return 1;
}
}
return 0;
}
hkvs_table *hkvs_table_open(hkvs *c, uint32_t id, size_t key_size) {
hkvs_table **tables = c->tables;
size_t n_tables = c->n_tables;
for(size_t i = 0; i < n_tables; i++) {
hkvs_table *t = tables[i];
if(!t) continue;
if(hkvs_table__id(t) == id) {
if(hkvs_table__key_size(t) != key_size) return NULL;
return t;
}
}
return NULL;
}
HKVS_INLINE size_t hkvs_elt_size(size_t key_size, size_t val_size_hint) {
size_t elt_size;
if(val_size_hint >= 16 && val_size_hint <= 248) {
elt_size = key_size + val_size_hint;
elt_size += (-elt_size) % 64;
if(elt_size - key_size <= 248) return elt_size;
}
elt_size = key_size + 16;
elt_size += (-elt_size) % 64;
return elt_size;
}
int hkvs_table_create(hkvs *c, hkvs_table **pt, uint32_t id, size_t key_size_z, size_t val_size_hint) {
hkvs_table **tables = c->tables;
size_t n_tables = c->n_tables;
for(size_t i = 0; i < n_tables; i++) {
hkvs_table *t = tables[i];
if(!t) continue;
if(hkvs_table__id(t) == id) {
if(hkvs_table__key_size(t) != key_size_z) return -EEXIST;
*pt = t;
return 0;
}
}
if(key_size_z > 255) return -EINVAL;
uint8_t key_size = (uint8_t)key_size_z;
size_t elt_size = hkvs_elt_size(key_size, val_size_hint);
size_t slot;
for(slot = 0; slot < n_tables; slot++) {
if(!tables[slot]) break;
}
if(slot == n_tables) {
if(c->alloc_tables == n_tables) {
size_t new_alloc = c->alloc_tables;
new_alloc += (new_alloc >> 2) + 1;
tables = realloc(tables, new_alloc * sizeof(hkvs_table*));
if(!tables) return -ENOMEM;
c->tables = tables;
c->alloc_tables = new_alloc;
}
c->tables[n_tables++] = NULL;
c->n_tables = n_tables;
int r = hkvs_resize_param(c);
if(r < 0) {
c->n_tables = --n_tables;
return r;
}
}
char *param = c->root_param + HKVS_POFF_TABLE + slot * HKVS_PSIZE_TABLE;
memset(param, 0, HKVS_PSIZE_TABLE);
hkvs_table *t = malloc(sizeof(hkvs_table));
if(!t) return -ENOMEM;
hkvs_write_u16(param + HKVS_PARAM_TABLE_ELTSZ, (uint16_t)elt_size);
hkvs_write_u8(param + HKVS_PARAM_TABLE_KEYSZ, key_size);
hkvs_write_u32(param + HKVS_PARAM_TABLE_ID, id);
hkvs_io *io = c->io;
int r = hkvs_slab_init(&t->slab, io, param, elt_size);
if(r < 0) goto fail_free;
r = hkvs_ix_build(t, io);
if(r < 0) goto fail_close;
c->tables[slot] = t;
*pt = t;
return 1;
fail_close:
hkvs_slab_destroy(&t->slab, io);
uint64_t fi = hkvs_read_u64(param + HKVS_PARAM_SLAB_FI);
io->unlink(io, fi);
fail_free:
free(t);
return r;
}
|
