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author darius
date Sat, 06 Dec 1997 05:41:29 +0000
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2:fba0b6e6cdc7 3:5a977ccbc7a9
1 /* zconf.h -- configuration of the zlib compression library
2 * Copyright (C) 1995 Jean-loup Gailly.
3 * For conditions of distribution and use, see copyright notice in zlib.h
4 */
5
6 /* $Id: zconf.h,v 1.1.1.1 1997/12/06 05:41:38 darius Exp $ */
7
8 #ifndef _ZCONF_H
9 #define _ZCONF_H
10
11 /*
12 The library does not install any signal handler. It is recommended to
13 add at least a handler for SIGSEGV when decompressing; the library checks
14 the consistency of the input data whenever possible but may go nuts
15 for some forms of corrupted input.
16 */
17
18 /*
19 * Compile with -DMAXSEG_64K if the alloc function cannot allocate more
20 * than 64k bytes at a time (needed on systems with 16-bit int).
21 */
22 #if defined(_GNUC__) && !defined(__32BIT__)
23 # define __32BIT__
24 #endif
25 #if defined(__MSDOS__) && !defined(MSDOS)
26 # define MSDOS
27 #endif
28 #if defined(MSDOS) && !defined(__32BIT__)
29 # define MAXSEG_64K
30 #endif
31 #if !defined(STDC) && (defined(MSDOS) || defined(__STDC__))
32 # define STDC
33 #endif
34
35 /* Maximum value for memLevel in deflateInit2 */
36 #ifndef MAX_MEM_LEVEL
37 # ifdef MAXSEG_64K
38 # define MAX_MEM_LEVEL 8
39 # else
40 # define MAX_MEM_LEVEL 9
41 # endif
42 #endif
43
44 /* Maximum value for windowBits in deflateInit2 and inflateInit2 */
45 #ifndef MAX_WBITS
46 # define MAX_WBITS 15 /* 32K LZ77 window */
47 #endif
48
49 /* The memory requirements for deflate are (in bytes):
50 1 << (windowBits+2) + 1 << (memLevel+9)
51 that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values)
52 plus a few kilobytes for small objects. For example, if you want to reduce
53 the default memory requirements from 256K to 128K, compile with
54 make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
55 Of course this will generally degrade compression (there's no free lunch).
56
57 The memory requirements for inflate are (in bytes) 1 << windowBits
58 that is, 32K for windowBits=15 (default value) plus a few kilobytes
59 for small objects.
60 */
61
62 /* Type declarations */
63
64 #ifndef __P /* function prototypes */
65 # ifdef STDC
66 # define __P(args) args
67 # else
68 # define __P(args) ()
69 # endif
70 #endif
71
72 #ifndef Byte
73 typedef unsigned char Byte; /* 8 bits */
74 #endif
75 #ifndef uInt
76 typedef unsigned int uInt; /* 16 bits or more */
77 #endif
78 #ifndef uLong
79 typedef unsigned long uLong; /* 32 bits or more */
80 #endif
81 #ifndef voidp
82 # ifdef STDC
83 typedef void *voidp;
84 # else
85 typedef Byte *voidp;
86 # endif
87 #endif
88
89 #endif /* _ZCONF_H */
90