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
|
/* SPDX-License-Identifier: LGPL-3.0-or-later */
/*
* id_table.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#define SQFS_BUILDING_DLL
#include "config.h"
#include "sqfs/id_table.h"
#include "sqfs/super.h"
#include "sqfs/table.h"
#include "sqfs/error.h"
#include "compat.h"
#include "util/array.h"
#include <stdlib.h>
#include <string.h>
struct sqfs_id_table_t {
sqfs_object_t base;
array_t ids;
};
static void id_table_destroy(sqfs_object_t *obj)
{
sqfs_id_table_t *tbl = (sqfs_id_table_t *)obj;
array_cleanup(&tbl->ids);
free(tbl);
}
static sqfs_object_t *id_table_copy(const sqfs_object_t *obj)
{
const sqfs_id_table_t *tbl = (const sqfs_id_table_t *)obj;
sqfs_id_table_t *copy = calloc(1, sizeof(*copy));
if (copy == NULL)
return NULL;
if (array_init_copy(©->ids, &tbl->ids) != 0) {
free(copy);
return NULL;
}
return (sqfs_object_t *)copy;
}
sqfs_id_table_t *sqfs_id_table_create(sqfs_u32 flags)
{
sqfs_id_table_t *tbl;
if (flags != 0)
return NULL;
tbl = calloc(1, sizeof(sqfs_id_table_t));
if (tbl != NULL) {
array_init(&tbl->ids, sizeof(sqfs_u32), 0);
sqfs_object_init(tbl, id_table_destroy, id_table_copy);
}
return tbl;
}
int sqfs_id_table_id_to_index(sqfs_id_table_t *tbl, sqfs_u32 id, sqfs_u16 *out)
{
size_t i;
for (i = 0; i < tbl->ids.used; ++i) {
if (((sqfs_u32 *)tbl->ids.data)[i] == id) {
*out = i;
return 0;
}
}
if (tbl->ids.used == 0x10000)
return SQFS_ERROR_OVERFLOW;
*out = tbl->ids.used;
return array_append(&tbl->ids, &id);
}
int sqfs_id_table_index_to_id(const sqfs_id_table_t *tbl, sqfs_u16 index,
sqfs_u32 *out)
{
if (index >= tbl->ids.used)
return SQFS_ERROR_OUT_OF_BOUNDS;
*out = ((sqfs_u32 *)tbl->ids.data)[index];
return 0;
}
int sqfs_id_table_read(sqfs_id_table_t *tbl, sqfs_file_t *file,
const sqfs_super_t *super, sqfs_compressor_t *cmp)
{
sqfs_u64 upper_limit, lower_limit;
void *raw_ids;
size_t i;
int ret;
if (!super->id_count || super->id_table_start >= super->bytes_used)
return SQFS_ERROR_CORRUPTED;
upper_limit = super->id_table_start;
lower_limit = super->directory_table_start;
if (super->fragment_table_start > lower_limit &&
super->fragment_table_start < upper_limit) {
lower_limit = super->fragment_table_start;
}
if (super->export_table_start > lower_limit &&
super->export_table_start < upper_limit) {
lower_limit = super->export_table_start;
}
array_cleanup(&tbl->ids);
tbl->ids.size = sizeof(sqfs_u32);
ret = sqfs_read_table(file, cmp, super->id_count * sizeof(sqfs_u32),
super->id_table_start, lower_limit,
upper_limit, &raw_ids);
if (ret)
return ret;
for (i = 0; i < super->id_count; ++i)
((sqfs_u32 *)raw_ids)[i] = le32toh(((sqfs_u32 *)raw_ids)[i]);
tbl->ids.data = raw_ids;
tbl->ids.used = super->id_count;
tbl->ids.count = super->id_count;
return 0;
}
int sqfs_id_table_write(sqfs_id_table_t *tbl, sqfs_file_t *file,
sqfs_super_t *super, sqfs_compressor_t *cmp)
{
sqfs_u64 start;
size_t i;
int ret;
for (i = 0; i < tbl->ids.used; ++i) {
((sqfs_u32 *)tbl->ids.data)[i] =
htole32(((sqfs_u32 *)tbl->ids.data)[i]);
}
super->id_count = tbl->ids.used;
ret = sqfs_write_table(file, cmp, tbl->ids.data,
sizeof(sqfs_u32) * tbl->ids.used, &start);
super->id_table_start = start;
for (i = 0; i < tbl->ids.used; ++i) {
((sqfs_u32 *)tbl->ids.data)[i] =
le32toh(((sqfs_u32 *)tbl->ids.data)[i]);
}
return ret;
}
|
