zconf.h (1770B)
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 52typedef unsigned char Byte; /* 8 bits */ 53typedef unsigned int uInt; /* 16 bits or more */ 54typedef unsigned long uLong; /* 32 bits or more */ 55typedef void *voidp; 56 57#endif /* _ZCONF_H */