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
|
// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2012
* Lei Wen <leiwen@marvell.com>, Marvell Inc.
*/
#include <common.h>
#include <watchdog.h>
#include <command.h>
#include <gzip.h>
#include <image.h>
#include <malloc.h>
#include <memalign.h>
#include <u-boot/zlib.h>
#include "zlib/zutil.h"
#ifndef CFG_GZIP_COMPRESS_DEF_SZ
#define CFG_GZIP_COMPRESS_DEF_SZ 0x200
#endif
#define ZALLOC_ALIGNMENT 16
static void *zalloc(void *x, unsigned items, unsigned size)
{
void *p;
size *= items;
size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);
p = malloc_cache_aligned(size);
return (p);
}
static void zfree(void *x, void *addr, unsigned nb)
{
free (addr);
}
int gzip(void *dst, unsigned long *lenp,
unsigned char *src, unsigned long srclen)
{
return zzip(dst, lenp, src, srclen, 1, NULL);
}
/*
* Compress blocks with zlib
*/
int zzip(void *dst, unsigned long *lenp, unsigned char *src,
unsigned long srclen, int stoponerr,
int (*func)(unsigned long, unsigned long))
{
z_stream s;
int r, flush, orig, window;
unsigned long comp_len, left_len;
if (!srclen)
return 0;
#ifndef CONFIG_GZIP
window = MAX_WBITS;
#else
window = 2 * MAX_WBITS;
#endif
orig = *lenp;
s.zalloc = zalloc;
s.zfree = zfree;
s.opaque = Z_NULL;
r = deflateInit2_(&s, Z_BEST_SPEED, Z_DEFLATED, window,
DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY,
ZLIB_VERSION, sizeof(z_stream));
if (r != Z_OK) {
printf ("Error: deflateInit2_() returned %d\n", r);
return -1;
}
while (srclen > 0) {
comp_len = (srclen > CFG_GZIP_COMPRESS_DEF_SZ) ?
CFG_GZIP_COMPRESS_DEF_SZ : srclen;
s.next_in = src;
s.avail_in = comp_len;
flush = (srclen > CFG_GZIP_COMPRESS_DEF_SZ)?
Z_NO_FLUSH : Z_FINISH;
do {
left_len = (*lenp > CFG_GZIP_COMPRESS_DEF_SZ) ?
CFG_GZIP_COMPRESS_DEF_SZ : *lenp;
s.next_out = dst;
s.avail_out = left_len;
r = deflate(&s, flush);
if (r == Z_STREAM_ERROR && stoponerr == 1) {
printf("Error: deflate() returned %d\n", r);
r = -1;
goto bail;
}
if (!func) {
dst += (left_len - s.avail_out);
*lenp -= (left_len - s.avail_out);
} else if (left_len - s.avail_out > 0) {
r = func((unsigned long)dst,
left_len - s.avail_out);
if (r < 0)
goto bail;
}
} while (s.avail_out == 0 && (*lenp > 0));
if (s.avail_in) {
printf("Deflate failed to consume %u bytes", s.avail_in);
r = -1;
goto bail;
}
if (*lenp == 0) {
printf("Deflate need more space to compress "
"left %lu bytes\n", srclen);
r = -1;
goto bail;
}
srclen -= comp_len;
src += comp_len;
}
r = 0;
bail:
deflateEnd(&s);
*lenp = orig - *lenp;
return r;
}
|