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 /* @(#) $Id$ */ 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 extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */ 41 /* (size given to avoid silly warnings with Visual C++) */ 42 43 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)] 44 45 #define ERR_RETURN(strm,err) \ 46 return (strm->msg = (char*)ERR_MSG(err), (err)) 47 /* To be used only when the state is known to be valid */ 48 49 /* common constants */ 50 51 #ifndef DEF_WBITS 52 # define DEF_WBITS MAX_WBITS 53 #endif 54 /* default windowBits for decompression. MAX_WBITS is for compression only */ 55 56 #if MAX_MEM_LEVEL >= 8 57 # define DEF_MEM_LEVEL 8 58 #else 59 # define DEF_MEM_LEVEL MAX_MEM_LEVEL 60 #endif 61 /* default memLevel */ 62 63 #define STORED_BLOCK 0 64 #define STATIC_TREES 1 65 #define DYN_TREES 2 66 /* The three kinds of block type */ 67 68 #define MIN_MATCH 3 69 #define MAX_MATCH 258 70 /* The minimum and maximum match lengths */ 71 72 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */ 73 74 /* target dependencies */ 75 76 #ifdef MSDOS 77 # define OS_CODE 0x00 78 # if defined(__TURBOC__) || defined(__BORLANDC__) 79 # if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__)) 80 /* Allow compilation with ANSI keywords only enabled */ 81 void _Cdecl farfree( void *block ); 82 void *_Cdecl farmalloc( unsigned long nbytes ); 83 # else 84 # include <alloc.h> 85 # endif 86 # else /* MSC or DJGPP */ 87 # include <malloc.h> 88 # endif 89 #endif 90 91 #ifdef OS2 92 # define OS_CODE 0x06 93 #endif 94 95 #ifdef WIN32 /* Window 95 & Windows NT */ 96 # define OS_CODE 0x0b 97 #endif 98 99 #if defined(VAXC) || defined(VMS) 100 # define OS_CODE 0x02 101 # define F_OPEN(name, mode) \ 102 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512") 103 #endif 104 105 #ifdef AMIGA 106 # define OS_CODE 0x01 107 #endif 108 109 #if defined(ATARI) || defined(atarist) 110 # define OS_CODE 0x05 111 #endif 112 113 #if defined(MACOS) || defined(TARGET_OS_MAC) 114 # define OS_CODE 0x07 115 # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os 116 # include <unix.h> /* for fdopen */ 117 # else 118 # ifndef fdopen 119 # define fdopen(fd,mode) NULL /* No fdopen() */ 120 # endif 121 # endif 122 #endif 123 124 #ifdef __50SERIES /* Prime/PRIMOS */ 125 # define OS_CODE 0x0F 126 #endif 127 128 #ifdef TOPS20 129 # define OS_CODE 0x0a 130 #endif 131 132 #if defined(_BEOS_) || defined(RISCOS) 133 # define fdopen(fd,mode) NULL /* No fdopen() */ 134 #endif 135 136 #if (defined(_MSC_VER) && (_MSC_VER > 600)) 137 # define fdopen(fd,type) _fdopen(fd,type) 138 #endif 139 140 141 /* Common defaults */ 142 143 #ifndef OS_CODE 144 # define OS_CODE 0x03 /* assume Unix */ 145 #endif 146 147 #ifndef F_OPEN 148 # define F_OPEN(name, mode) fopen((name), (mode)) 149 #endif 150 151 /* functions */ 152 153 #ifdef HAVE_STRERROR 154 extern char *strerror OF((int)); 155 # define zstrerror(errnum) strerror(errnum) 156 #else 157 # define zstrerror(errnum) "" 158 #endif 159 160 #if defined(pyr) 161 # define NO_MEMCPY 162 #endif 163 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__) 164 /* Use our own functions for small and medium model with MSC <= 5.0. 165 * You may have to use the same strategy for Borland C (untested). 166 * The __SC__ check is for Symantec. 167 */ 168 # define NO_MEMCPY 169 #endif 170 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY) 171 # define HAVE_MEMCPY 172 #endif 173 #ifdef HAVE_MEMCPY 174 # ifdef SMALL_MEDIUM /* MSDOS small or medium model */ 175 # define zmemcpy _fmemcpy 176 # define zmemcmp _fmemcmp 177 # define zmemzero(dest, len) _fmemset(dest, 0, len) 178 # else 179 # define zmemcpy memcpy 180 # define zmemcmp memcmp 181 # define zmemzero(dest, len) memset(dest, 0, len) 182 # endif 183 #else 184 extern void zmemcpy OF((Bytef* dest, const Bytef* source, uInt len)); 185 extern int zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len)); 186 extern void zmemzero OF((Bytef* dest, uInt len)); 187 #endif 188 189 /* Diagnostic functions */ 190 #ifdef DEBUG 191 # include <stdio.h> 192 extern int z_verbose; 193 extern void z_error OF((char *m)); 194 # define Assert(cond,msg) {if(!(cond)) z_error(msg);} 195 # define Trace(x) {if (z_verbose>=0) fprintf x ;} 196 # define Tracev(x) {if (z_verbose>0) fprintf x ;} 197 # define Tracevv(x) {if (z_verbose>1) fprintf x ;} 198 # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;} 199 # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;} 200 #else 201 # define Assert(cond,msg) 202 # define Trace(x) 203 # define Tracev(x) 204 # define Tracevv(x) 205 # define Tracec(c,x) 206 # define Tracecv(c,x) 207 #endif 208 209 210 typedef uLong (ZEXPORT *check_func) OF((uLong check, const Bytef *buf, 211 uInt len)); 212 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size)); 213 void zcfree OF((voidpf opaque, voidpf ptr)); 214 215 #define ZALLOC(strm, items, size) \ 216 (*((strm)->zalloc))((strm)->opaque, (items), (size)) 217 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr)) 218 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);} 219 220 #endif /* _Z_UTIL_H */ 221