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
|
/*
* Copyright 2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/modctl.h>
#include <sys/zmod.h>
#include <sys/systm.h>
#include "zlib.h"
/*
* Uncompress the buffer 'src' into the buffer 'dst'. The caller must store
* the expected decompressed data size externally so it can be passed in.
* The resulting decompressed size is then returned through dstlen. This
* function return Z_OK on success, or another error code on failure.
*/
int
z_uncompress(void *dst, size_t *dstlen, const void *src, size_t srclen)
{
z_stream zs;
int err;
bzero(&zs, sizeof (zs));
zs.next_in = (uchar_t *)src;
zs.avail_in = srclen;
zs.next_out = dst;
zs.avail_out = *dstlen;
if ((err = inflateInit(&zs)) != Z_OK)
return (err);
if ((err = inflate(&zs, Z_FINISH)) != Z_STREAM_END) {
(void) inflateEnd(&zs);
return (err == Z_OK ? Z_BUF_ERROR : err);
}
*dstlen = zs.total_out;
return (inflateEnd(&zs));
}
static const char *const z_errmsg[] = {
"need dictionary", /* Z_NEED_DICT 2 */
"stream end", /* Z_STREAM_END 1 */
"", /* Z_OK 0 */
"file error", /* Z_ERRNO (-1) */
"stream error", /* Z_STREAM_ERROR (-2) */
"data error", /* Z_DATA_ERROR (-3) */
"insufficient memory", /* Z_MEM_ERROR (-4) */
"buffer error", /* Z_BUF_ERROR (-5) */
"incompatible version" /* Z_VERSION_ERROR (-6) */
};
/*
* Convert a zlib error code into a string error message.
*/
const char *
z_strerror(int err)
{
int i = Z_NEED_DICT - err;
if (i < 0 || i >= sizeof (z_errmsg) / sizeof (z_errmsg[0]))
return ("unknown error");
return (z_errmsg[i]);
}
static struct modlmisc modlmisc = {
&mod_miscops, "RFC 1950 decompression routines"
};
static struct modlinkage modlinkage = {
MODREV_1, &modlmisc, NULL
};
int
_init(void)
{
return (mod_install(&modlinkage));
}
int
_info(struct modinfo *mip)
{
return (mod_info(&modlinkage, mip));
}
int
_fini(void)
{
return (mod_remove(&modlinkage));
}
|
