Current File : //usr/src/kernels/3.10.0-957.21.3.el7.centos.plus.x86_64/include/linux/zconf.h
/* 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 */
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