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
|
/*
* gzip.h
*
* Copyright (c) 2001 Dug Song <dugsong@arbor.net>
* Copyright (c) 2001 Arbor Networks, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The names of the copyright holders may not be used to endorse or
* promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Vendor: gzip.h,v 1.2 2005/04/01 16:47:31 dugsong Exp $
*/
#ifndef GZIP_H
#define GZIP_H
/* RFC 1952 is b0rked! This is from gzip-1.2.4's algorithm.doc... */
/* Magic header */
#define GZIP_MAGIC "\037\213"
/* Compression methods */
#define GZIP_MSTORED 0
#define GZIP_MCOMPRESS 1
#define GZIP_MPACKED 2
#define GZIP_MLZHED 3
#define GZIP_MDEFLATE 8
/* Flags */
#define GZIP_FTEXT 0x01
#define GZIP_FCONT 0x02 /* never set by gzip-1.2.4 */
#define GZIP_FEXTRA 0x04
#define GZIP_FNAME 0x08
#define GZIP_FCOMMENT 0x10
#define GZIP_FENCRYPT 0x20
#define GZIP_FRESERVED 0xC0
#define GZIP_FENCRYPT_LEN 12
#define GZSIG_ID "GS"
#define GZSIG_VERSION 1
struct gzsig_data {
u_char version;
#ifdef COMMENT_ONLY
u_char signature[];
#endif
};
/*
* Note: all number fields below are in little-endian byte order.
*/
struct gzip_xfield {
u_short len;
struct gzip_subfield {
u_char id[2];
u_short len;
#ifdef COMMENT_ONLY
u_char data[];
#endif
} subfield;
};
struct gzip_header {
u_char magic[2];
u_char method;
u_char flags;
u_char mtime[4];
u_char xflags;
u_char os;
#if COMMENT_ONLY
/* Optional fields */
u_char part[2]; /* flags & GZIP_FCONT */
struct gzip_xfield xfield; /* flags & GZIP_FEXTRA */
char filename[]; /* flags & GZIP_FNAME */
char comment[]; /* flags & GZIP_FCOMMENT */
u_char encrypt_hdr[12]; /* flags & GZIP_FENCRYPT */
#endif
};
struct gzip_trailer {
u_int32_t crc32[4];
u_int32_t size[4];
};
#endif /* GZIP_H */
|
