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
|
/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* lzo.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#define SQFS_BUILDING_DLL
#include "config.h"
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <lzo/lzo1x.h>
#include "internal.h"
#define LZO_NUM_ALGS (sizeof(lzo_algs) / sizeof(lzo_algs[0]))
typedef int (*lzo_cb_t)(const lzo_bytep src, lzo_uint src_len, lzo_bytep dst,
lzo_uintp dst_len, lzo_voidp wrkmem);
static const struct {
lzo_cb_t compress;
size_t bufsize;
} lzo_algs[] = {
[SQFS_LZO1X_1] = {
.compress = lzo1x_1_compress,
.bufsize = LZO1X_1_MEM_COMPRESS,
},
[SQFS_LZO1X_1_11] = {
.compress = lzo1x_1_11_compress,
.bufsize = LZO1X_1_11_MEM_COMPRESS,
},
[SQFS_LZO1X_1_12] = {
.compress = lzo1x_1_12_compress,
.bufsize = LZO1X_1_12_MEM_COMPRESS,
},
[SQFS_LZO1X_1_15] = {
.compress = lzo1x_1_15_compress,
.bufsize = LZO1X_1_15_MEM_COMPRESS,
},
[SQFS_LZO1X_999] = {
.compress = lzo1x_999_compress,
.bufsize = LZO1X_999_MEM_COMPRESS,
},
};
typedef struct {
sqfs_compressor_t base;
int algorithm;
int level;
uint8_t buffer[];
} lzo_compressor_t;
typedef struct {
uint32_t algorithm;
uint32_t level;
} lzo_options_t;
static int lzo_write_options(sqfs_compressor_t *base, int fd)
{
lzo_compressor_t *lzo = (lzo_compressor_t *)base;
lzo_options_t opt;
if (lzo->algorithm == SQFS_LZO_DEFAULT_ALG &&
lzo->level == SQFS_LZO_DEFAULT_LEVEL) {
return 0;
}
opt.algorithm = htole32(lzo->algorithm);
if (lzo->algorithm == SQFS_LZO1X_999) {
opt.level = htole32(lzo->level);
} else {
opt.level = 0;
}
return sqfs_generic_write_options(fd, &opt, sizeof(opt));
}
static int lzo_read_options(sqfs_compressor_t *base, int fd)
{
lzo_compressor_t *lzo = (lzo_compressor_t *)base;
lzo_options_t opt;
int ret;
ret = sqfs_generic_read_options(fd, &opt, sizeof(opt));
if (ret)
return ret;
lzo->algorithm = le32toh(opt.algorithm);
lzo->level = le32toh(opt.level);
switch(lzo->algorithm) {
case SQFS_LZO1X_1:
case SQFS_LZO1X_1_11:
case SQFS_LZO1X_1_12:
case SQFS_LZO1X_1_15:
if (lzo->level != 0)
return SQFS_ERROR_UNSUPPORTED;
break;
case SQFS_LZO1X_999:
if (lzo->level < 1 || lzo->level > 9)
return SQFS_ERROR_UNSUPPORTED;
break;
default:
return SQFS_ERROR_UNSUPPORTED;
}
return 0;
}
static ssize_t lzo_comp_block(sqfs_compressor_t *base, const uint8_t *in,
size_t size, uint8_t *out, size_t outsize)
{
lzo_compressor_t *lzo = (lzo_compressor_t *)base;
lzo_uint len = outsize;
int ret;
if (lzo->algorithm == SQFS_LZO1X_999 &&
lzo->level != SQFS_LZO_DEFAULT_LEVEL) {
ret = lzo1x_999_compress_level(in, size, out, &len,
lzo->buffer, NULL, 0, 0,
lzo->level);
} else {
ret = lzo_algs[lzo->algorithm].compress(in, size, out,
&len, lzo->buffer);
}
if (ret != LZO_E_OK)
return SQFS_ERROR_COMRPESSOR;
if (len < size)
return len;
return 0;
}
static ssize_t lzo_uncomp_block(sqfs_compressor_t *base, const uint8_t *in,
size_t size, uint8_t *out, size_t outsize)
{
lzo_compressor_t *lzo = (lzo_compressor_t *)base;
lzo_uint len = outsize;
int ret;
ret = lzo1x_decompress_safe(in, size, out, &len, lzo->buffer);
if (ret != LZO_E_OK)
return SQFS_ERROR_COMRPESSOR;
return len;
}
static sqfs_compressor_t *lzo_create_copy(sqfs_compressor_t *cmp)
{
lzo_compressor_t *other = (lzo_compressor_t *)cmp;
lzo_compressor_t *lzo;
lzo = alloc_flex(sizeof(*lzo), 1, lzo_algs[other->algorithm].bufsize);
if (lzo == NULL)
return NULL;
memcpy(lzo, other, sizeof(*lzo));
return (sqfs_compressor_t *)lzo;
}
static void lzo_destroy(sqfs_compressor_t *base)
{
free(base);
}
sqfs_compressor_t *lzo_compressor_create(const sqfs_compressor_config_t *cfg)
{
sqfs_compressor_t *base;
lzo_compressor_t *lzo;
if (cfg->flags & ~SQFS_COMP_FLAG_GENERIC_ALL)
return NULL;
if (cfg->opt.lzo.algorithm > LZO_NUM_ALGS ||
lzo_algs[cfg->opt.lzo.algorithm].compress == NULL) {
return NULL;
}
if (cfg->opt.lzo.algorithm == SQFS_LZO1X_999) {
if (cfg->opt.lzo.level > SQFS_LZO_MAX_LEVEL)
return NULL;
} else if (cfg->opt.lzo.level != 0) {
return NULL;
}
lzo = alloc_flex(sizeof(*lzo), 1,
lzo_algs[cfg->opt.lzo.algorithm].bufsize);
base = (sqfs_compressor_t *)lzo;
if (lzo == NULL)
return NULL;
lzo->algorithm = cfg->opt.lzo.algorithm;
lzo->level = cfg->opt.lzo.level;
base->destroy = lzo_destroy;
base->do_block = (cfg->flags & SQFS_COMP_FLAG_UNCOMPRESS) ?
lzo_uncomp_block : lzo_comp_block;
base->write_options = lzo_write_options;
base->read_options = lzo_read_options;
base->create_copy = lzo_create_copy;
return base;
}
|
