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author | Sascha Hauer <s.hauer@pengutronix.de> | 2011-12-07 12:03:13 +0100 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2011-12-07 12:03:13 +0100 |
commit | 0ee6847f7b6d396d3756f6ecd0781a00b9cca980 (patch) | |
tree | 1f1bed639ac0bbc9091685538c791b4648f4c342 /include/linux/zconf.h | |
parent | 61b62f6d33d55c9b89ba8a6fbae84cb9c33e342a (diff) | |
parent | 8b3d10265da20b8be6138799cee704d53dee1c63 (diff) | |
download | barebox-0ee6847f7b6d396d3756f6ecd0781a00b9cca980.tar.gz barebox-0ee6847f7b6d396d3756f6ecd0781a00b9cca980.tar.xz |
Merge branch 'next'
Diffstat (limited to 'include/linux/zconf.h')
-rw-r--r-- | include/linux/zconf.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/include/linux/zconf.h b/include/linux/zconf.h new file mode 100644 index 0000000000..9e8750e82a --- /dev/null +++ b/include/linux/zconf.h @@ -0,0 +1,57 @@ +/* zconf.h -- configuration of the zlib compression library + * Copyright (C) 1995-1998 Jean-loup Gailly. + * For conditions of distribution and use, see copyright notice in zlib.h + */ + +/* @(#) $Id$ */ + +#ifndef _ZCONF_H +#define _ZCONF_H + +/* The memory requirements for deflate are (in bytes): + (1 << (windowBits+2)) + (1 << (memLevel+9)) + that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values) + plus a few kilobytes for small objects. For example, if you want to reduce + the default memory requirements from 256K to 128K, compile with + make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7" + Of course this will generally degrade compression (there's no free lunch). + + The memory requirements for inflate are (in bytes) 1 << windowBits + that is, 32K for windowBits=15 (default value) plus a few kilobytes + for small objects. +*/ + +/* Maximum value for memLevel in deflateInit2 */ +#ifndef MAX_MEM_LEVEL +# define MAX_MEM_LEVEL 8 +#endif + +/* Maximum value for windowBits in deflateInit2 and inflateInit2. + * WARNING: reducing MAX_WBITS makes minigzip unable to extract .gz files + * created by gzip. (Files created by minigzip can still be extracted by + * gzip.) + */ +#ifndef MAX_WBITS +# define MAX_WBITS 15 /* 32K LZ77 window */ +#endif + +/* default windowBits for decompression. MAX_WBITS is for compression only */ +#ifndef DEF_WBITS +# define DEF_WBITS MAX_WBITS +#endif + +/* default memLevel */ +#if MAX_MEM_LEVEL >= 8 +# define DEF_MEM_LEVEL 8 +#else +# define DEF_MEM_LEVEL MAX_MEM_LEVEL +#endif + + /* Type declarations */ + +typedef unsigned char Byte; /* 8 bits */ +typedef unsigned int uInt; /* 16 bits or more */ +typedef unsigned long uLong; /* 32 bits or more */ +typedef void *voidp; + +#endif /* _ZCONF_H */ |