1 /* zutil.h -- internal interface and configuration of the compression library 2 * Copyright (C) 1995-2002 Jean-loup Gailly. 3 * For conditions of distribution and use, see copyright notice in zlib.h 4 */ 5 6 /* WARNING: this file should *not* be used by applications. It is 7 part of the implementation of the compression library and is 8 subject to change. Applications should only use zlib.h. 9 */ 10 11 /* @(#) $Id: zutil.h,v 1.2 2002/11/06 22:32:54 davidT Exp $ */ 12 13 #ifndef _Z_UTIL_H 14 #define _Z_UTIL_H 15 16 #include "zlib.h" 17 18 #ifdef STDC 19 # include <stddef.h> 20 # include <string.h> 21 # include <stdlib.h> 22 #endif 23 #ifdef NO_ERRNO_H 24 extern int errno; 25 #else 26 # include <errno.h> 27 #endif 28 29 #ifndef local 30 # define local static 31 #endif 32 /* compile with -Dlocal if your debugger can't find static symbols */ 33 34 typedef unsigned char uch; 35 typedef uch FAR uchf; 36 typedef unsigned short ush; 37 typedef ush FAR ushf; 38 typedef unsigned long ulg; 39 40 41 #define ERR_RETURN(strm,err) \ 42 return (strm->msg = (char*)ERR_MSG(err), (err)) 43 /* To be used only when the state is known to be valid */ 44 45 /* common constants */ 46 47 #ifndef DEF_WBITS 48 # define DEF_WBITS MAX_WBITS 49 #endif 50 /* default windowBits for decompression. MAX_WBITS is for compression only */ 51 52 #if MAX_MEM_LEVEL >= 8 53 # define DEF_MEM_LEVEL 8 54 #else 55 # define DEF_MEM_LEVEL MAX_MEM_LEVEL 56 #endif 57 /* default memLevel */ 58 59 #define STORED_BLOCK 0 60 #define STATIC_TREES 1 61 #define DYN_TREES 2 62 /* The three kinds of block type */ 63 64 #define MIN_MATCH 3 65 #define MAX_MATCH 258 66 /* The minimum and maximum match lengths */ 67 68 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */ 69 70 /* target dependencies */ 71 72 #ifdef MSDOS 73 # define OS_CODE 0x00 74 # if defined(__TURBOC__) || defined(__BORLANDC__) 75 # if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__)) 76 /* Allow compilation with ANSI keywords only enabled */ 77 void _Cdecl farfree( void *block ); 78 void *_Cdecl farmalloc( unsigned long nbytes ); 79 # else 80 # include <alloc.h> 81 # endif 82 # else /* MSC or DJGPP */ 83 # include <malloc.h> 84 # endif 85 #endif 86 87 #ifdef OS2 88 # define OS_CODE 0x06 89 #endif 90 91 #ifdef WIN32 /* Window 95 & Windows NT */ 92 # define OS_CODE 0x0b 93 #endif 94 95 #if defined(VAXC) || defined(VMS) 96 # define OS_CODE 0x02 97 # define F_OPEN(name, mode) \ 98 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512") 99 #endif 100 101 #ifdef AMIGA 102 # define OS_CODE 0x01 103 #endif 104 105 #if defined(ATARI) || defined(atarist) 106 # define OS_CODE 0x05 107 #endif 108 109 #if defined(MACOS) || defined(TARGET_OS_MAC) 110 # define OS_CODE 0x07 111 # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os 112 # include <unix.h> /* for fdopen */ 113 # else 114 # ifndef fdopen 115 # define fdopen(fd,mode) NULL /* No fdopen() */ 116 # endif 117 # endif 118 #endif 119 120 #ifdef __50SERIES /* Prime/PRIMOS */ 121 # define OS_CODE 0x0F 122 #endif 123 124 #ifdef TOPS20 125 # define OS_CODE 0x0a 126 #endif 127 128 #if defined(_BEOS_) || defined(RISCOS) 129 # define fdopen(fd,mode) NULL /* No fdopen() */ 130 #endif 131 132 #if (defined(_MSC_VER) && (_MSC_VER > 600)) 133 # define fdopen(fd,type) _fdopen(fd,type) 134 #endif 135 136 137 /* Common defaults */ 138 139 #ifndef OS_CODE 140 # define OS_CODE 0x03 /* assume Unix */ 141 #endif 142 143 #ifndef F_OPEN 144 # define F_OPEN(name, mode) fopen((name), (mode)) 145 #endif 146 147 /* functions */ 148 149 #ifdef HAVE_STRERROR 150 extern char *strerror OF((int)); 151 # define zstrerror(errnum) strerror(errnum) 152 #else 153 # define zstrerror(errnum) "" 154 #endif 155 156 #if defined(pyr) 157 # define NO_MEMCPY 158 #endif 159 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__) 160 /* Use our own functions for small and medium model with MSC <= 5.0. 161 * You may have to use the same strategy for Borland C (untested). 162 * The __SC__ check is for Symantec. 163 */ 164 # define NO_MEMCPY 165 #endif 166 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY) 167 # define HAVE_MEMCPY 168 #endif 169 #ifdef HAVE_MEMCPY 170 # ifdef SMALL_MEDIUM /* MSDOS small or medium model */ 171 # define zmemcpy _fmemcpy 172 # define zmemcmp _fmemcmp 173 # define zmemzero(dest, len) _fmemset(dest, 0, len) 174 # else 175 # define zmemcpy ft_memcpy 176 # define zmemcmp memcmp 177 # define zmemzero(dest, len) memset(dest, 0, len) 178 # endif 179 #else 180 extern void zmemcpy OF((Bytef* dest, const Bytef* source, uInt len)); 181 extern int zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len)); 182 extern void zmemzero OF((Bytef* dest, uInt len)); 183 #endif 184 185 /* Diagnostic functions */ 186 #ifdef DEBUG 187 # include <stdio.h> 188 extern int z_verbose; 189 extern void z_error OF((char *m)); 190 # define Assert(cond,msg) {if(!(cond)) z_error(msg);} 191 # define Trace(x) {if (z_verbose>=0) fprintf x ;} 192 # define Tracev(x) {if (z_verbose>0) fprintf x ;} 193 # define Tracevv(x) {if (z_verbose>1) fprintf x ;} 194 # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;} 195 # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;} 196 #else 197 # define Assert(cond,msg) 198 # define Trace(x) 199 # define Tracev(x) 200 # define Tracevv(x) 201 # define Tracec(c,x) 202 # define Tracecv(c,x) 203 #endif 204 205 206 typedef uLong (ZEXPORT *check_func) OF((uLong check, const Bytef *buf, 207 uInt len)); 208 local voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size)); 209 local void zcfree OF((voidpf opaque, voidpf ptr)); 210 211 #define ZALLOC(strm, items, size) \ 212 (*((strm)->zalloc))((strm)->opaque, (items), (size)) 213 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr)) 214 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);} 215 216 #endif /* _Z_UTIL_H */ 217