| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 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 | #include "stddef.h" |
| 12 | |
| 13 | /* The memory requirements for deflate are (in bytes): |
| 14 | (1 << (windowBits+2)) + (1 << (memLevel+9)) |
| 15 | that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values) |
| 16 | plus a few kilobytes for small objects. For example, if you want to reduce |
| 17 | the default memory requirements from 256K to 128K, compile with |
| 18 | make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7" |
| 19 | Of course this will generally degrade compression (there's no free lunch). |
| 20 | |
| 21 | The memory requirements for inflate are (in bytes) 1 << windowBits |
| 22 | that is, 32K for windowBits=15 (default value) plus a few kilobytes |
| 23 | for small objects. |
| 24 | */ |
| 25 | |
| 26 | /* Maximum value for memLevel in deflateInit2 */ |
| 27 | #ifndef MAX_MEM_LEVEL |
| 28 | # define MAX_MEM_LEVEL 8 |
| 29 | #endif |
| 30 | |
| 31 | /* Maximum value for windowBits in deflateInit2 and inflateInit2. |
| 32 | * WARNING: reducing MAX_WBITS makes minigzip unable to extract .gz files |
| 33 | * created by gzip. (Files created by minigzip can still be extracted by |
| 34 | * gzip.) |
| 35 | */ |
| 36 | #ifndef MAX_WBITS |
| 37 | # define MAX_WBITS 15 /* 32K LZ77 window */ |
| 38 | #endif |
| 39 | |
| 40 | /* default windowBits for decompression. MAX_WBITS is for compression only */ |
| 41 | #ifndef DEF_WBITS |
| 42 | # define DEF_WBITS MAX_WBITS |
| 43 | #endif |
| 44 | |
| 45 | /* default memLevel */ |
| 46 | #if MAX_MEM_LEVEL >= 8 |
| 47 | # define DEF_MEM_LEVEL 8 |
| 48 | #else |
| 49 | # define DEF_MEM_LEVEL MAX_MEM_LEVEL |
| 50 | #endif |
| 51 | |
| 52 | #ifndef NULL |
| 53 | #define NULL (void *)0 |
| 54 | #endif |
| 55 | |
| 56 | #define ENOMEM 12 |
| 57 | |
| 58 | /* Type declarations */ |
| 59 | typedef unsigned char u8; |
| 60 | typedef unsigned char Byte; /* 8 bits */ |
| 61 | typedef unsigned int uInt; /* 16 bits or more */ |
| 62 | typedef unsigned long uLong; /* 32 bits or more */ |
| 63 | typedef void *voidp; |
| 64 | |
| 65 | #endif /* _ZCONF_H */ |