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zconf.h
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1 /* zconf.h -- configuration of the zlib compression library
2  * Copyright (C) 1995-1998 Jean-loup Gailly.
3  * For conditions of distribution and use, see copyright notice in zlib.h
4  */
5 
6 /* @(#) $Id$ */
7 
8 #ifndef _ZCONF_H
9 #define _ZCONF_H
10 
11 /* The memory requirements for deflate are (in bytes):
12  (1 << (windowBits+2)) + (1 << (memLevel+9))
13  that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values)
14  plus a few kilobytes for small objects. For example, if you want to reduce
15  the default memory requirements from 256K to 128K, compile with
16  make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
17  Of course this will generally degrade compression (there's no free lunch).
18 
19  The memory requirements for inflate are (in bytes) 1 << windowBits
20  that is, 32K for windowBits=15 (default value) plus a few kilobytes
21  for small objects.
22 */
23 
24 /* Maximum value for memLevel in deflateInit2 */
25 #ifndef MAX_MEM_LEVEL
26 # define MAX_MEM_LEVEL 8
27 #endif
28 
29 /* Maximum value for windowBits in deflateInit2 and inflateInit2.
30  * WARNING: reducing MAX_WBITS makes minigzip unable to extract .gz files
31  * created by gzip. (Files created by minigzip can still be extracted by
32  * gzip.)
33  */
34 #ifndef MAX_WBITS
35 # define MAX_WBITS 15 /* 32K LZ77 window */
36 #endif
37 
38 /* default windowBits for decompression. MAX_WBITS is for compression only */
39 #ifndef DEF_WBITS
40 # define DEF_WBITS MAX_WBITS
41 #endif
42 
43 /* default memLevel */
44 #if MAX_MEM_LEVEL >= 8
45 # define DEF_MEM_LEVEL 8
46 #else
47 # define DEF_MEM_LEVEL MAX_MEM_LEVEL
48 #endif
49 
50  /* Type declarations */
51 
52 typedef unsigned char Byte; /* 8 bits */
53 typedef unsigned int uInt; /* 16 bits or more */
54 typedef unsigned long uLong; /* 32 bits or more */
55 typedef void *voidp;
56 
57 #endif /* _ZCONF_H */