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kernel/linux-imx6_3.14.28/include/linux/zconf.h 1.73 KB
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  /* 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 */