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96 lines
2.5 KiB
96 lines
2.5 KiB
/* zconf.h -- configuration of the zlib compression library |
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* Copyright (C) 1995 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: zconf.h,v 1.12 1995/05/03 17:27:12 jloup Exp $ */ |
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#ifndef _ZCONF_H |
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#define _ZCONF_H |
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/* |
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The library does not install any signal handler. It is recommended to |
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add at least a handler for SIGSEGV when decompressing; the library checks |
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the consistency of the input data whenever possible but may go nuts |
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for some forms of corrupted input. |
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*/ |
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/* |
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* Compile with -DMAXSEG_64K if the alloc function cannot allocate more |
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* than 64k bytes at a time (needed on systems with 16-bit int). |
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*/ |
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#if defined(_GNUC__) && !defined(__32BIT__) |
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# define __32BIT__ |
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#endif |
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#if defined(__MSDOS__) && !defined(MSDOS) |
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# define MSDOS |
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#endif |
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#if defined(MSDOS) && !defined(__32BIT__) |
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# define MAXSEG_64K |
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#endif |
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#ifndef STDC |
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# if defined(MSDOS) || defined(__STDC__) || defined(__cplusplus) |
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# define STDC |
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# endif |
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#endif |
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#if !defined(STDC) && !defined(const) |
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# define const |
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#endif |
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/* Maximum value for memLevel in deflateInit2 */ |
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#ifndef MAX_MEM_LEVEL |
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# ifdef MAXSEG_64K |
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# define MAX_MEM_LEVEL 8 |
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# else |
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# define MAX_MEM_LEVEL 9 |
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# endif |
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#endif |
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/* Maximum value for windowBits in deflateInit2 and inflateInit2 */ |
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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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/* 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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/* Type declarations */ |
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#ifndef __P /* function prototypes */ |
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# ifdef STDC |
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# define __P(args) args |
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# else |
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# define __P(args) () |
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# endif |
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#endif |
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#ifndef Byte |
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typedef unsigned char Byte; /* 8 bits */ |
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#endif |
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#ifndef uInt |
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typedef unsigned int uInt; /* 16 bits or more */ |
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#endif |
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#ifndef uLong |
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typedef unsigned long uLong; /* 32 bits or more */ |
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#endif |
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#ifndef voidp |
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# ifdef STDC |
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typedef void *voidp; |
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# else |
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typedef Byte *voidp; |
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# endif |
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#endif |
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#endif /* _ZCONF_H */ |
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