1 /* zutil.h -- internal interface and configuration of the compression library 2 * Copyright (C) 1995-2005 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 ZUTIL_H 14 #define ZUTIL_H 15 16 #define ZLIB_INTERNAL 17 #include "zlib.h" 18 19 #ifdef STDC 20 # ifndef _WIN32_WCE 21 # include <stddef.h> 22 # endif 23 # include <string.h> 24 # include <stdlib.h> 25 #endif 26 #ifdef NO_ERRNO_H 27 # ifdef _WIN32_WCE 28 /* The Microsoft C Run-Time Library for Windows CE doesn't have 29 * errno. We define it as a global variable to simplify porting. 30 * Its value is always 0 and should not be used. We rename it to 31 * avoid conflict with other libraries that use the same workaround. 32 */ 33 # define errno z_errno 34 # endif 35 extern int errno; 36 #else 37 # ifndef _WIN32_WCE 38 # include <errno.h> 39 # endif 40 #endif 41 42 #ifndef local 43 # define local static 44 #endif 45 /* compile with -Dlocal if your debugger can't find static symbols */ 46 47 typedef unsigned char uch; 48 typedef uch FAR uchf; 49 typedef unsigned short ush; 50 typedef ush FAR ushf; 51 typedef unsigned long ulg; 52 53 extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */ 54 /* (size given to avoid silly warnings with Visual C++) */ 55 56 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)] 57 58 #define ERR_RETURN(strm,err) \ 59 return (strm->msg = (char*)ERR_MSG(err), (err)) 60 /* To be used only when the state is known to be valid */ 61 62 /* common constants */ 63 64 #ifndef DEF_WBITS 65 # define DEF_WBITS MAX_WBITS 66 #endif 67 /* default windowBits for decompression. MAX_WBITS is for compression only */ 68 69 #if MAX_MEM_LEVEL >= 8 70 # define DEF_MEM_LEVEL 8 71 #else 72 # define DEF_MEM_LEVEL MAX_MEM_LEVEL 73 #endif 74 /* default memLevel */ 75 76 #define STORED_BLOCK 0 77 #define STATIC_TREES 1 78 #define DYN_TREES 2 79 /* The three kinds of block type */ 80 81 #define MIN_MATCH 3 82 #define MAX_MATCH 258 83 /* The minimum and maximum match lengths */ 84 85 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */ 86 87 /* target dependencies */ 88 89 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32)) 90 # define OS_CODE 0x00 91 # if defined(__TURBOC__) || defined(__BORLANDC__) 92 # if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__)) 93 /* Allow compilation with ANSI keywords only enabled */ 94 void _Cdecl farfree( void *block ); 95 void *_Cdecl farmalloc( unsigned long nbytes ); 96 # else 97 # include <alloc.h> 98 # endif 99 # else /* MSC or DJGPP */ 100 # include <malloc.h> 101 # endif 102 #endif 103 104 #ifdef AMIGA 105 # define OS_CODE 0x01 106 #endif 107 108 #if defined(VAXC) || defined(VMS) 109 # define OS_CODE 0x02 110 # define F_OPEN(name, mode) \ 111 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512") 112 #endif 113 114 #if defined(ATARI) || defined(atarist) 115 # define OS_CODE 0x05 116 #endif 117 118 #ifdef OS2 119 # define OS_CODE 0x06 120 # ifdef M_I86 121 #include <malloc.h> 122 # endif 123 #endif 124 125 #if defined(MACOS) || defined(TARGET_OS_MAC) 126 # define OS_CODE 0x07 127 # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os 128 # include <unix.h> /* for fdopen */ 129 # else 130 # ifndef fdopen 131 # define fdopen(fd,mode) NULL /* No fdopen() */ 132 # endif 133 # endif 134 #endif 135 136 #ifdef TOPS20 137 # define OS_CODE 0x0a 138 #endif 139 140 #ifdef WIN32 141 # ifndef __CYGWIN__ /* Cygwin is Unix, not Win32 */ 142 # define OS_CODE 0x0b 143 # endif 144 #endif 145 146 #ifdef __50SERIES /* Prime/PRIMOS */ 147 # define OS_CODE 0x0f 148 #endif 149 150 #if defined(_BEOS_) || defined(RISCOS) 151 # define fdopen(fd,mode) NULL /* No fdopen() */ 152 #endif 153 154 #if (defined(_MSC_VER) && (_MSC_VER > 600)) 155 # if defined(_WIN32_WCE) 156 # define fdopen(fd,mode) NULL /* No fdopen() */ 157 # ifndef _PTRDIFF_T_DEFINED 158 typedef int ptrdiff_t; 159 # define _PTRDIFF_T_DEFINED 160 # endif 161 # else 162 # define fdopen(fd,type) _fdopen(fd,type) 163 # endif 164 #endif 165 166 /* common defaults */ 167 168 #ifndef OS_CODE 169 # define OS_CODE 0x03 /* assume Unix */ 170 #endif 171 172 #ifndef F_OPEN 173 # define F_OPEN(name, mode) fopen((name), (mode)) 174 #endif 175 176 /* functions */ 177 178 #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550) 179 # ifndef HAVE_VSNPRINTF 180 # define HAVE_VSNPRINTF 181 # endif 182 #endif 183 #if defined(__CYGWIN__) 184 # ifndef HAVE_VSNPRINTF 185 # define HAVE_VSNPRINTF 186 # endif 187 #endif 188 #ifndef HAVE_VSNPRINTF 189 # ifdef MSDOS 190 /* vsnprintf may exist on some MS-DOS compilers (DJGPP?), 191 but for now we just assume it doesn't. */ 192 # define NO_vsnprintf 193 # endif 194 # ifdef __TURBOC__ 195 # define NO_vsnprintf 196 # endif 197 # ifdef WIN32 198 /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */ 199 # if !defined(vsnprintf) && !defined(NO_vsnprintf) 200 # define vsnprintf _vsnprintf 201 # endif 202 # endif 203 # ifdef __SASC 204 # define NO_vsnprintf 205 # endif 206 #endif 207 #ifdef VMS 208 # define NO_vsnprintf 209 #endif 210 211 #if defined(pyr) 212 # define NO_MEMCPY 213 #endif 214 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__) 215 /* Use our own functions for small and medium model with MSC <= 5.0. 216 * You may have to use the same strategy for Borland C (untested). 217 * The __SC__ check is for Symantec. 218 */ 219 # define NO_MEMCPY 220 #endif 221 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY) 222 # define HAVE_MEMCPY 223 #endif 224 #ifdef HAVE_MEMCPY 225 # ifdef SMALL_MEDIUM /* MSDOS small or medium model */ 226 # define zmemcpy _fmemcpy 227 # define zmemcmp _fmemcmp 228 # define zmemzero(dest, len) _fmemset(dest, 0, len) 229 # else 230 # define zmemcpy memcpy 231 # define zmemcmp memcmp 232 # define zmemzero(dest, len) memset(dest, 0, len) 233 # endif 234 #else 235 extern void zmemcpy OF((Bytef* dest, const Bytef* source, uInt len)); 236 extern int zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len)); 237 extern void zmemzero OF((Bytef* dest, uInt len)); 238 #endif 239 240 /* Diagnostic functions */ 241 #ifdef DEBUG 242 # include <stdio.h> 243 extern int z_verbose; 244 extern void z_error OF((char *m)); 245 # define Assert(cond,msg) {if(!(cond)) z_error(msg);} 246 # define Trace(x) {if (z_verbose>=0) fprintf x ;} 247 # define Tracev(x) {if (z_verbose>0) fprintf x ;} 248 # define Tracevv(x) {if (z_verbose>1) fprintf x ;} 249 # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;} 250 # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;} 251 #else 252 # define Assert(cond,msg) 253 # define Trace(x) 254 # define Tracev(x) 255 # define Tracevv(x) 256 # define Tracec(c,x) 257 # define Tracecv(c,x) 258 #endif 259 260 261 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size)); 262 void zcfree OF((voidpf opaque, voidpf ptr)); 263 264 #define ZALLOC(strm, items, size) \ 265 (*((strm)->zalloc))((strm)->opaque, (items), (size)) 266 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr)) 267 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);} 268 269 #endif /* ZUTIL_H */ 270