zutil.h revision 131380
1/* zutil.h -- internal interface and configuration of the compression library 2 * Copyright (C) 1995-2003 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/* @(#) $FreeBSD: head/lib/libz/zutil.h 131380 2004-06-30 23:54:46Z tjr $ */ 12 13#ifndef ZUTIL_H 14#define ZUTIL_H 15 16#define ZLIB_INTERNAL 17#include "zlib.h" 18 19#ifdef STDC 20# include <stddef.h> 21# include <string.h> 22# include <stdlib.h> 23#endif 24#ifdef NO_ERRNO_H 25 extern int errno; 26#else 27# include <errno.h> 28#endif 29 30#ifndef local 31# define local static 32#endif 33/* compile with -Dlocal if your debugger can't find static symbols */ 34 35typedef unsigned char uch; 36typedef uch FAR uchf; 37typedef unsigned short ush; 38typedef ush FAR ushf; 39typedef unsigned long ulg; 40 41extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */ 42/* (size given to avoid silly warnings with Visual C++) */ 43 44#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)] 45 46#define ERR_RETURN(strm,err) \ 47 return (strm->msg = (char*)ERR_MSG(err), (err)) 48/* To be used only when the state is known to be valid */ 49 50 /* common constants */ 51 52#ifndef DEF_WBITS 53# define DEF_WBITS MAX_WBITS 54#endif 55/* default windowBits for decompression. MAX_WBITS is for compression only */ 56 57#if MAX_MEM_LEVEL >= 8 58# define DEF_MEM_LEVEL 8 59#else 60# define DEF_MEM_LEVEL MAX_MEM_LEVEL 61#endif 62/* default memLevel */ 63 64#define STORED_BLOCK 0 65#define STATIC_TREES 1 66#define DYN_TREES 2 67/* The three kinds of block type */ 68 69#define MIN_MATCH 3 70#define MAX_MATCH 258 71/* The minimum and maximum match lengths */ 72 73#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */ 74 75 /* target dependencies */ 76 77#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32)) 78# define OS_CODE 0x00 79# if defined(__TURBOC__) || defined(__BORLANDC__) 80# if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__)) 81 /* Allow compilation with ANSI keywords only enabled */ 82 void _Cdecl farfree( void *block ); 83 void *_Cdecl farmalloc( unsigned long nbytes ); 84# else 85# include <alloc.h> 86# endif 87# else /* MSC or DJGPP */ 88# include <malloc.h> 89# endif 90#endif 91 92#ifdef AMIGA 93# define OS_CODE 0x01 94#endif 95 96#if defined(VAXC) || defined(VMS) 97# define OS_CODE 0x02 98# define F_OPEN(name, mode) \ 99 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512") 100#endif 101 102#if defined(ATARI) || defined(atarist) 103# define OS_CODE 0x05 104#endif 105 106#ifdef OS2 107# define OS_CODE 0x06 108#endif 109 110#if defined(MACOS) || defined(TARGET_OS_MAC) 111# define OS_CODE 0x07 112# if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os 113# include <unix.h> /* for fdopen */ 114# else 115# ifndef fdopen 116# define fdopen(fd,mode) NULL /* No fdopen() */ 117# endif 118# endif 119#endif 120 121#ifdef TOPS20 122# define OS_CODE 0x0a 123#endif 124 125#ifdef WIN32 126# ifndef __CYGWIN__ /* Cygwin is Unix, not Win32 */ 127# define OS_CODE 0x0b 128# endif 129#endif 130 131#ifdef __50SERIES /* Prime/PRIMOS */ 132# define OS_CODE 0x0f 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# if defined(_WIN32_WCE) 141# define fdopen(fd,mode) NULL /* No fdopen() */ 142# ifndef _PTRDIFF_T_DEFINED 143 typedef int ptrdiff_t; 144# define _PTRDIFF_T_DEFINED 145# endif 146# else 147# define fdopen(fd,type) _fdopen(fd,type) 148# endif 149#endif 150 151 /* common defaults */ 152 153#ifndef OS_CODE 154# define OS_CODE 0x03 /* assume Unix */ 155#endif 156 157#ifndef F_OPEN 158# define F_OPEN(name, mode) fopen((name), (mode)) 159#endif 160 161 /* functions */ 162 163#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550) 164# ifndef HAVE_VSNPRINTF 165# define HAVE_VSNPRINTF 166# endif 167#endif 168#if defined(__CYGWIN__) 169# ifndef HAVE_VSNPRINTF 170# define HAVE_VSNPRINTF 171# endif 172#endif 173#ifndef HAVE_VSNPRINTF 174# ifdef MSDOS 175 /* vsnprintf may exist on some MS-DOS compilers (DJGPP?), 176 but for now we just assume it doesn't. */ 177# define NO_vsnprintf 178# endif 179# ifdef __TURBOC__ 180# define NO_vsnprintf 181# endif 182# ifdef WIN32 183 /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */ 184# if !defined(vsnprintf) && !defined(NO_vsnprintf) 185# define vsnprintf _vsnprintf 186# endif 187# endif 188# ifdef __SASC 189# define NO_vsnprintf 190# endif 191#endif 192 193#ifdef HAVE_STRERROR 194 extern char *strerror OF((int)); 195# define zstrerror(errnum) strerror(errnum) 196#else 197# define zstrerror(errnum) "" 198#endif 199 200#if defined(pyr) 201# define NO_MEMCPY 202#endif 203#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__) 204 /* Use our own functions for small and medium model with MSC <= 5.0. 205 * You may have to use the same strategy for Borland C (untested). 206 * The __SC__ check is for Symantec. 207 */ 208# define NO_MEMCPY 209#endif 210#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY) 211# define HAVE_MEMCPY 212#endif 213#ifdef HAVE_MEMCPY 214# ifdef SMALL_MEDIUM /* MSDOS small or medium model */ 215# define zmemcpy _fmemcpy 216# define zmemcmp _fmemcmp 217# define zmemzero(dest, len) _fmemset(dest, 0, len) 218# else 219# define zmemcpy memcpy 220# define zmemcmp memcmp 221# define zmemzero(dest, len) memset(dest, 0, len) 222# endif 223#else 224 extern void zmemcpy OF((Bytef* dest, const Bytef* source, uInt len)); 225 extern int zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len)); 226 extern void zmemzero OF((Bytef* dest, uInt len)); 227#endif 228 229/* Diagnostic functions */ 230#ifdef DEBUG 231# include <stdio.h> 232 extern int z_verbose; 233 extern void z_error OF((char *m)); 234# define Assert(cond,msg) {if(!(cond)) z_error(msg);} 235# define Trace(x) {if (z_verbose>=0) fprintf x ;} 236# define Tracev(x) {if (z_verbose>0) fprintf x ;} 237# define Tracevv(x) {if (z_verbose>1) fprintf x ;} 238# define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;} 239# define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;} 240#else 241# define Assert(cond,msg) 242# define Trace(x) 243# define Tracev(x) 244# define Tracevv(x) 245# define Tracec(c,x) 246# define Tracecv(c,x) 247#endif 248 249 250voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size)); 251void zcfree OF((voidpf opaque, voidpf ptr)); 252 253#define ZALLOC(strm, items, size) \ 254 (*((strm)->zalloc))((strm)->opaque, (items), (size)) 255#define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr)) 256#define TRY_FREE(s, p) {if (p) ZFREE(s, p);} 257 258#endif /* ZUTIL_H */ 259