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 12/* $Id: zutil.h 14574 2005-10-29 16:27:43Z bonefish $ */ 13 14/* @(#) $Id: zutil.h 14574 2005-10-29 16:27:43Z bonefish $ */ 15 16#ifndef _Z_UTIL_H 17#define _Z_UTIL_H 18 19#include "zlib.h" 20 21#ifdef STDC 22# include <stddef.h> 23# include <string.h> 24# include <stdlib.h> 25#endif 26#ifdef NO_ERRNO_H 27 extern int errno; 28#else 29# include <errno.h> 30#endif 31 32#ifndef local 33# define local static 34#endif 35/* compile with -Dlocal if your debugger can't find static symbols */ 36 37typedef unsigned char uch; 38typedef uch FAR uchf; 39typedef unsigned short ush; 40typedef ush FAR ushf; 41typedef unsigned long ulg; 42 43extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */ 44/* (size given to avoid silly warnings with Visual C++) */ 45 46#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)] 47 48#define ERR_RETURN(strm,err) \ 49 return (strm->msg = (char*)ERR_MSG(err), (err)) 50/* To be used only when the state is known to be valid */ 51 52 /* common constants */ 53 54#ifndef DEF_WBITS 55# define DEF_WBITS MAX_WBITS 56#endif 57/* default windowBits for decompression. MAX_WBITS is for compression only */ 58 59#if MAX_MEM_LEVEL >= 8 60# define DEF_MEM_LEVEL 8 61#else 62# define DEF_MEM_LEVEL MAX_MEM_LEVEL 63#endif 64/* default memLevel */ 65 66#define STORED_BLOCK 0 67#define STATIC_TREES 1 68#define DYN_TREES 2 69/* The three kinds of block type */ 70 71#define MIN_MATCH 3 72#define MAX_MATCH 258 73/* The minimum and maximum match lengths */ 74 75#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */ 76 77 /* target dependencies */ 78 79#ifdef MSDOS 80# define OS_CODE 0x00 81# if defined(__TURBOC__) || defined(__BORLANDC__) 82# if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__)) 83 /* Allow compilation with ANSI keywords only enabled */ 84 void _Cdecl farfree( void *block ); 85 void *_Cdecl farmalloc( unsigned long nbytes ); 86# else 87# include <alloc.h> 88# endif 89# else /* MSC or DJGPP */ 90# include <malloc.h> 91# endif 92#endif 93 94#ifdef OS2 95# define OS_CODE 0x06 96#endif 97 98#ifdef WIN32 /* Window 95 & Windows NT */ 99# define OS_CODE 0x0b 100#endif 101 102#if defined(VAXC) || defined(VMS) 103# define OS_CODE 0x02 104# define F_OPEN(name, mode) \ 105 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512") 106#endif 107 108#ifdef AMIGA 109# define OS_CODE 0x01 110#endif 111 112#if defined(ATARI) || defined(atarist) 113# define OS_CODE 0x05 114#endif 115 116#if defined(MAC) || defined(TARGET_OS_MAC) 117# define OS_CODE 0x07 118# if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os 119# include <unix.h> /* for fdopen */ 120# else 121# ifndef fdopen 122# define fdopen(fd,mode) NULL /* No fdopen() */ 123# endif 124# endif 125#endif 126 127#ifdef __50SERIES /* Prime/PRIMOS */ 128# define OS_CODE 0x0F 129#endif 130 131#ifdef TOPS20 132# define OS_CODE 0x0a 133#endif 134 135#if defined(_BEOS_) || defined(RISCOS) 136# define fdopen(fd,mode) NULL /* No fdopen() */ 137#endif 138 139#if (defined(_MSC_VER) && (_MSC_VER > 600)) 140# define fdopen(fd,type) _fdopen(fd,type) 141#endif 142 143 144 /* Common defaults */ 145 146#ifndef OS_CODE 147# define OS_CODE 0x03 /* assume Unix */ 148#endif 149 150#ifndef F_OPEN 151# define F_OPEN(name, mode) fopen((name), (mode)) 152#endif 153 154 /* functions */ 155 156#ifdef HAVE_STRERROR 157 extern char *strerror OF((int)); 158# define zstrerror(errnum) strerror(errnum) 159#else 160# define zstrerror(errnum) "" 161#endif 162 163#if defined(pyr) 164# define NO_MEMCPY 165#endif 166#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__) 167 /* Use our own functions for small and medium model with MSC <= 5.0. 168 * You may have to use the same strategy for Borland C (untested). 169 * The __SC__ check is for Symantec. 170 */ 171# define NO_MEMCPY 172#endif 173#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY) 174# define HAVE_MEMCPY 175#endif 176#ifdef HAVE_MEMCPY 177# ifdef SMALL_MEDIUM /* MSDOS small or medium model */ 178# define zmemcpy _fmemcpy 179# define zmemcmp _fmemcmp 180# define zmemzero(dest, len) _fmemset(dest, 0, len) 181# else 182# define zmemcpy memcpy 183# define zmemcmp memcmp 184# define zmemzero(dest, len) memset(dest, 0, len) 185# endif 186#else 187 extern void zmemcpy OF((Bytef* dest, const Bytef* source, uInt len)); 188 extern int zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len)); 189 extern void zmemzero OF((Bytef* dest, uInt len)); 190#endif 191 192/* Diagnostic functions */ 193#ifdef DEBUG 194# include <stdio.h> 195 extern int z_verbose; 196 extern void z_error OF((char *m)); 197# define Assert(cond,msg) {if(!(cond)) z_error(msg);} 198#else 199# define Assert(cond,msg) 200#endif 201 202/* PDFlib GmbH: we don't like trace messages from here. */ 203#if 0 204# define Trace(x) {if (z_verbose>=0) fprintf x ;} 205# define Tracev(x) {if (z_verbose>0) fprintf x ;} 206# define Tracevv(x) {if (z_verbose>1) fprintf x ;} 207# define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;} 208# define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;} 209#else 210# define Trace(x) 211# define Tracev(x) 212# define Tracevv(x) 213# define Tracec(c,x) 214# define Tracecv(c,x) 215#endif 216 217 218typedef uLong (ZEXPORT *check_func) OF((uLong check, const Bytef *buf, 219 uInt len)); 220voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size)); 221void zcfree OF((voidpf opaque, voidpf ptr)); 222 223#define ZALLOC(strm, items, size) \ 224 (*((strm)->zalloc))((strm)->opaque, (items), (size)) 225#define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr)) 226#define TRY_FREE(s, p) {if (p) ZFREE(s, p);} 227 228#endif /* _Z_UTIL_H */ 229