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57 lines
1.7 KiB
57 lines
1.7 KiB
/* zconf.h -- configuration of the zlib compression library |
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* Copyright (C) 1995-1998 Jean-loup Gailly. |
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* For conditions of distribution and use, see copyright notice in zlib.h |
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*/ |
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/* @(#) $Id$ */ |
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#ifndef _ZCONF_H |
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#define _ZCONF_H |
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/* The memory requirements for deflate are (in bytes): |
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(1 << (windowBits+2)) + (1 << (memLevel+9)) |
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that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values) |
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plus a few kilobytes for small objects. For example, if you want to reduce |
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the default memory requirements from 256K to 128K, compile with |
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make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7" |
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Of course this will generally degrade compression (there's no free lunch). |
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The memory requirements for inflate are (in bytes) 1 << windowBits |
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that is, 32K for windowBits=15 (default value) plus a few kilobytes |
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for small objects. |
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*/ |
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/* Maximum value for memLevel in deflateInit2 */ |
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#ifndef MAX_MEM_LEVEL |
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# define MAX_MEM_LEVEL 8 |
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#endif |
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/* Maximum value for windowBits in deflateInit2 and inflateInit2. |
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* WARNING: reducing MAX_WBITS makes minigzip unable to extract .gz files |
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* created by gzip. (Files created by minigzip can still be extracted by |
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* gzip.) |
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*/ |
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#ifndef MAX_WBITS |
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# define MAX_WBITS 15 /* 32K LZ77 window */ |
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#endif |
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/* default windowBits for decompression. MAX_WBITS is for compression only */ |
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#ifndef DEF_WBITS |
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# define DEF_WBITS MAX_WBITS |
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#endif |
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/* default memLevel */ |
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#if MAX_MEM_LEVEL >= 8 |
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# define DEF_MEM_LEVEL 8 |
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#else |
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# define DEF_MEM_LEVEL MAX_MEM_LEVEL |
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#endif |
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/* Type declarations */ |
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typedef unsigned char Byte; /* 8 bits */ |
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typedef unsigned int uInt; /* 16 bits or more */ |
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typedef unsigned long uLong; /* 32 bits or more */ |
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typedef void *voidp; |
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#endif /* _ZCONF_H */
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