diff options
Diffstat (limited to 'include/linux/zconf.h')
-rw-r--r-- | include/linux/zconf.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/include/linux/zconf.h b/include/linux/zconf.h new file mode 100644 index 000000000000..f1cfd66b9554 --- /dev/null +++ b/include/linux/zconf.h | |||
@@ -0,0 +1,45 @@ | |||
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 | /* Type declarations */ | ||
39 | |||
40 | typedef unsigned char Byte; /* 8 bits */ | ||
41 | typedef unsigned int uInt; /* 16 bits or more */ | ||
42 | typedef unsigned long uLong; /* 32 bits or more */ | ||
43 | typedef void *voidp; | ||
44 | |||
45 | #endif /* _ZCONF_H */ | ||