zutil.h revision 205471
1/* zutil.h -- internal interface and configuration of the compression library 2 * Copyright (C) 1995-2010 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# if !(defined(_WIN32_WCE) && defined(_MSC_VER)) 21# include <stddef.h> 22# endif 23# include <string.h> 24# include <stdlib.h> 25#endif 26 27#if defined(UNDER_CE) && defined(NO_ERRNO_H) 28# define zseterrno(ERR) SetLastError((DWORD)(ERR)) 29# define zerrno() ((int)GetLastError()) 30#else 31# ifdef NO_ERRNO_H 32 extern int errno; 33# else 34# include <errno.h> 35# endif 36# define zseterrno(ERR) do { errno = (ERR); } while (0) 37# define zerrno() errno 38#endif 39 40#ifndef local 41# define local static 42#endif 43/* compile with -Dlocal if your debugger can't find static symbols */ 44 45typedef unsigned char uch; 46typedef uch FAR uchf; 47typedef unsigned short ush; 48typedef ush FAR ushf; 49typedef unsigned long ulg; 50 51extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */ 52/* (size given to avoid silly warnings with Visual C++) */ 53 54#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)] 55 56#define ERR_RETURN(strm,err) \ 57 return (strm->msg = (char*)ERR_MSG(err), (err)) 58/* To be used only when the state is known to be valid */ 59 60 /* common constants */ 61 62#ifndef DEF_WBITS 63# define DEF_WBITS MAX_WBITS 64#endif 65/* default windowBits for decompression. MAX_WBITS is for compression only */ 66 67#if MAX_MEM_LEVEL >= 8 68# define DEF_MEM_LEVEL 8 69#else 70# define DEF_MEM_LEVEL MAX_MEM_LEVEL 71#endif 72/* default memLevel */ 73 74#define STORED_BLOCK 0 75#define STATIC_TREES 1 76#define DYN_TREES 2 77/* The three kinds of block type */ 78 79#define MIN_MATCH 3 80#define MAX_MATCH 258 81/* The minimum and maximum match lengths */ 82 83#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */ 84 85 /* target dependencies */ 86 87#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32)) 88# define OS_CODE 0x00 89# if defined(__TURBOC__) || defined(__BORLANDC__) 90# if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__)) 91 /* Allow compilation with ANSI keywords only enabled */ 92 void _Cdecl farfree( void *block ); 93 void *_Cdecl farmalloc( unsigned long nbytes ); 94# else 95# include <alloc.h> 96# endif 97# else /* MSC or DJGPP */ 98# include <malloc.h> 99# endif 100#endif 101 102#ifdef AMIGA 103# define OS_CODE 0x01 104#endif 105 106#if defined(VAXC) || defined(VMS) 107# define OS_CODE 0x02 108# define F_OPEN(name, mode) \ 109 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512") 110#endif 111 112#if defined(ATARI) || defined(atarist) 113# define OS_CODE 0x05 114#endif 115 116#ifdef OS2 117# define OS_CODE 0x06 118# ifdef M_I86 119# include <malloc.h> 120# endif 121#endif 122 123#if defined(MACOS) || defined(TARGET_OS_MAC) 124# define OS_CODE 0x07 125# if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os 126# include <unix.h> /* for fdopen */ 127# else 128# ifndef fdopen 129# define fdopen(fd,mode) NULL /* No fdopen() */ 130# endif 131# endif 132#endif 133 134#ifdef TOPS20 135# define OS_CODE 0x0a 136#endif 137 138#ifdef WIN32 139# ifndef __CYGWIN__ /* Cygwin is Unix, not Win32 */ 140# define OS_CODE 0x0b 141# endif 142#endif 143 144#ifdef __50SERIES /* Prime/PRIMOS */ 145# define OS_CODE 0x0f 146#endif 147 148#if defined(_BEOS_) || defined(RISCOS) 149# define fdopen(fd,mode) NULL /* No fdopen() */ 150#endif 151 152#if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX 153# if defined(_WIN32_WCE) 154# define fdopen(fd,mode) NULL /* No fdopen() */ 155# ifndef _PTRDIFF_T_DEFINED 156 typedef int ptrdiff_t; 157# define _PTRDIFF_T_DEFINED 158# endif 159# else 160# define fdopen(fd,type) _fdopen(fd,type) 161# endif 162#endif 163 164#if defined(__BORLANDC__) 165 #pragma warn -8004 166 #pragma warn -8008 167 #pragma warn -8066 168#endif 169 170#ifdef _LARGEFILE64_SOURCE 171# define z_off64_t off64_t 172#else 173# define z_off64_t z_off_t 174#endif 175 176 /* common defaults */ 177 178#ifndef OS_CODE 179# define OS_CODE 0x03 /* assume Unix */ 180#endif 181 182#ifndef F_OPEN 183# define F_OPEN(name, mode) fopen((name), (mode)) 184#endif 185 186#ifdef _LARGEFILE64_SOURCE 187# define F_OPEN64(name, mode) fopen64((name), (mode)) 188#else 189# define F_OPEN64(name, mode) fopen((name), (mode)) 190#endif 191 192 /* functions */ 193 194#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550) 195# ifndef HAVE_VSNPRINTF 196# define HAVE_VSNPRINTF 197# endif 198#endif 199#if defined(__CYGWIN__) 200# ifndef HAVE_VSNPRINTF 201# define HAVE_VSNPRINTF 202# endif 203#endif 204#ifndef HAVE_VSNPRINTF 205# ifdef MSDOS 206 /* vsnprintf may exist on some MS-DOS compilers (DJGPP?), 207 but for now we just assume it doesn't. */ 208# define NO_vsnprintf 209# endif 210# ifdef __TURBOC__ 211# define NO_vsnprintf 212# endif 213# ifdef WIN32 214 /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */ 215# if !defined(vsnprintf) && !defined(NO_vsnprintf) 216# if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 ) 217# define vsnprintf _vsnprintf 218# endif 219# endif 220# endif 221# ifdef __SASC 222# define NO_vsnprintf 223# endif 224#endif 225#ifdef VMS 226# define NO_vsnprintf 227#endif 228 229#if defined(pyr) 230# define NO_MEMCPY 231#endif 232#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__) 233 /* Use our own functions for small and medium model with MSC <= 5.0. 234 * You may have to use the same strategy for Borland C (untested). 235 * The __SC__ check is for Symantec. 236 */ 237# define NO_MEMCPY 238#endif 239#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY) 240# define HAVE_MEMCPY 241#endif 242#ifdef HAVE_MEMCPY 243# ifdef SMALL_MEDIUM /* MSDOS small or medium model */ 244# define zmemcpy _fmemcpy 245# define zmemcmp _fmemcmp 246# define zmemzero(dest, len) _fmemset(dest, 0, len) 247# else 248# define zmemcpy memcpy 249# define zmemcmp memcmp 250# define zmemzero(dest, len) memset(dest, 0, len) 251# endif 252#else 253 extern void zmemcpy OF((Bytef* dest, const Bytef* source, uInt len)); 254 extern int zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len)); 255 extern void zmemzero OF((Bytef* dest, uInt len)); 256#endif 257 258/* Diagnostic functions */ 259#ifdef DEBUG 260# include <stdio.h> 261 extern int z_verbose; 262 extern void z_error OF((char *m)); 263# define Assert(cond,msg) {if(!(cond)) z_error(msg);} 264# define Trace(x) {if (z_verbose>=0) fprintf x ;} 265# define Tracev(x) {if (z_verbose>0) fprintf x ;} 266# define Tracevv(x) {if (z_verbose>1) fprintf x ;} 267# define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;} 268# define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;} 269#else 270# define Assert(cond,msg) 271# define Trace(x) 272# define Tracev(x) 273# define Tracevv(x) 274# define Tracec(c,x) 275# define Tracecv(c,x) 276#endif 277 278 279voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size)); 280void zcfree OF((voidpf opaque, voidpf ptr)); 281 282#define ZALLOC(strm, items, size) \ 283 (*((strm)->zalloc))((strm)->opaque, (items), (size)) 284#define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr)) 285#define TRY_FREE(s, p) {if (p) ZFREE(s, p);} 286 287#endif /* ZUTIL_H */ 288