1 /* zutil.h -- internal interface and configuration of the compression library 2 * Copyright (C) 1995-1996 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: zutil.h,v 1.16 1996/07/24 13:41:13 me Exp $ */ 12 13 #ifndef _Z_UTIL_H 14 #define _Z_UTIL_H 15 16 #include "zlib.h" 17 18 #if defined(MSDOS)||defined(VMS)||defined(CRAY)||defined(WIN32)||defined(RISCOS) 19 # include <stddef.h> 20 # include <errno.h> 21 #else 22 extern int errno; 23 #endif 24 #ifdef STDC 25 # include <string.h> 26 # include <stdlib.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 # ifdef __TURBOC__ 79 # include <alloc.h> 80 # else /* MSC or DJGPP */ 81 # include <malloc.h> 82 # endif 83 #endif 84 85 #ifdef OS2 86 # define OS_CODE 0x06 87 #endif 88 89 #ifdef WIN32 /* Window 95 & Windows NT */ 90 # define OS_CODE 0x0b 91 #endif 92 93 #if defined(VAXC) || defined(VMS) 94 # define OS_CODE 0x02 95 # define FOPEN(name, mode) \ 96 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512") 97 #endif 98 99 #ifdef AMIGA 100 # define OS_CODE 0x01 101 #endif 102 103 #if defined(ATARI) || defined(atarist) 104 # define OS_CODE 0x05 105 #endif 106 107 #ifdef MACOS 108 # define OS_CODE 0x07 109 #endif 110 111 #ifdef __50SERIES /* Prime/PRIMOS */ 112 # define OS_CODE 0x0F 113 #endif 114 115 #ifdef TOPS20 116 # define OS_CODE 0x0a 117 #endif 118 119 #if defined(_BEOS_) || defined(RISCOS) 120 # define fdopen(fd,mode) NULL /* No fdopen() */ 121 #endif 122 123 /* Common defaults */ 124 125 #ifndef OS_CODE 126 # define OS_CODE 0x03 /* assume Unix */ 127 #endif 128 129 #ifndef FOPEN 130 # define FOPEN(name, mode) fopen((name), (mode)) 131 #endif 132 133 /* functions */ 134 135 #ifdef HAVE_STRERROR 136 extern char *strerror OF((int)); 137 # define zstrerror(errnum) strerror(errnum) 138 #else 139 # define zstrerror(errnum) "" 140 #endif 141 142 #if defined(pyr) 143 # define NO_MEMCPY 144 #endif 145 #if (defined(M_I86SM) || defined(M_I86MM)) && !defined(_MSC_VER) 146 /* Use our own functions for small and medium model with MSC <= 5.0. 147 * You may have to use the same strategy for Borland C (untested). 148 */ 149 # define NO_MEMCPY 150 #endif 151 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY) 152 # define HAVE_MEMCPY 153 #endif 154 #ifdef HAVE_MEMCPY 155 # ifdef SMALL_MEDIUM /* MSDOS small or medium model */ 156 # define zmemcpy _fmemcpy 157 # define zmemcmp _fmemcmp 158 # define zmemzero(dest, len) _fmemset(dest, 0, len) 159 # else 160 # define zmemcpy memcpy 161 # define zmemcmp memcmp 162 # define zmemzero(dest, len) memset(dest, 0, len) 163 # endif 164 #else 165 extern void zmemcpy OF((Bytef* dest, Bytef* source, uInt len)); 166 extern int zmemcmp OF((Bytef* s1, Bytef* s2, uInt len)); 167 extern void zmemzero OF((Bytef* dest, uInt len)); 168 #endif 169 170 /* Diagnostic functions */ 171 #ifdef DEBUG 172 # include <stdio.h> 173 # ifndef verbose 174 # define verbose 0 175 # endif 176 extern void z_error OF((char *m)); 177 # define Assert(cond,msg) {if(!(cond)) z_error(msg);} 178 # define Trace(x) fprintf x 179 # define Tracev(x) {if (verbose) fprintf x ;} 180 # define Tracevv(x) {if (verbose>1) fprintf x ;} 181 # define Tracec(c,x) {if (verbose && (c)) fprintf x ;} 182 # define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;} 183 #else 184 # define Assert(cond,msg) 185 # define Trace(x) 186 # define Tracev(x) 187 # define Tracevv(x) 188 # define Tracec(c,x) 189 # define Tracecv(c,x) 190 #endif 191 192 193 typedef uLong (*check_func) OF((uLong check, const Bytef *buf, uInt len)); 194 195 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size)); 196 void zcfree OF((voidpf opaque, voidpf ptr)); 197 198 #define ZALLOC(strm, items, size) \ 199 (*((strm)->zalloc))((strm)->opaque, (items), (size)) 200 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr)) 201 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);} 202 203 #endif /* _Z_UTIL_H */ 204