1 /* $OpenBSD: zutil.h,v 1.11 2000/11/08 15:39:10 art Exp $ */ 2 /* zutil.h -- internal interface and configuration of the compression library 3 * Copyright (C) 1995-1998 Jean-loup Gailly. 4 * For conditions of distribution and use, see copyright notice in zlib.h 5 */ 6 7 /* WARNING: this file should *not* be used by applications. It is 8 part of the implementation of the compression library and is 9 subject to change. Applications should only use zlib.h. 10 */ 11 12 13 #ifndef _Z_UTIL_H 14 #define _Z_UTIL_H 15 16 #include "zlib.h" 17 18 #ifdef _STANDALONE 19 #include <lib/libsa/stand.h> 20 #else 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 #endif 32 33 #ifndef local 34 # define local static 35 #endif 36 /* compile with -Dlocal if your debugger can't find static symbols */ 37 38 typedef unsigned char uch; 39 typedef uch FAR uchf; 40 typedef unsigned short ush; 41 typedef ush FAR ushf; 42 typedef unsigned long ulg; 43 44 extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */ 45 /* (size given to avoid silly warnings with Visual C++) */ 46 47 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)] 48 49 #define ERR_RETURN(strm,err) \ 50 return (strm->msg = (char*)ERR_MSG(err), (err)) 51 /* To be used only when the state is known to be valid */ 52 53 /* common constants */ 54 55 #ifndef DEF_WBITS 56 # define DEF_WBITS MAX_WBITS 57 #endif 58 /* default windowBits for decompression. MAX_WBITS is for compression only */ 59 60 #if MAX_MEM_LEVEL >= 8 61 # define DEF_MEM_LEVEL 8 62 #else 63 # define DEF_MEM_LEVEL MAX_MEM_LEVEL 64 #endif 65 /* default memLevel */ 66 67 #define STORED_BLOCK 0 68 #define STATIC_TREES 1 69 #define DYN_TREES 2 70 /* The three kinds of block type */ 71 72 #define MIN_MATCH 3 73 #define MAX_MATCH 258 74 /* The minimum and maximum match lengths */ 75 76 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */ 77 78 /* target dependencies */ 79 80 #ifdef MSDOS 81 # define OS_CODE 0x00 82 # if defined(__TURBOC__) || defined(__BORLANDC__) 83 # if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__)) 84 /* Allow compilation with ANSI keywords only enabled */ 85 void _Cdecl farfree( void *block ); 86 void *_Cdecl farmalloc( unsigned long nbytes ); 87 # else 88 # include <alloc.h> 89 # endif 90 # else /* MSC or DJGPP */ 91 # include <malloc.h> 92 # endif 93 #endif 94 95 #ifdef OS2 96 # define OS_CODE 0x06 97 #endif 98 99 #ifdef WIN32 /* Window 95 & Windows NT */ 100 # define OS_CODE 0x0b 101 #endif 102 103 #if defined(VAXC) || defined(VMS) 104 # define OS_CODE 0x02 105 # define F_OPEN(name, mode) \ 106 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512") 107 #endif 108 109 #ifdef AMIGA 110 # define OS_CODE 0x01 111 #endif 112 113 #if defined(ATARI) || defined(atarist) 114 # define OS_CODE 0x05 115 #endif 116 117 #if defined(MACOS) || defined(TARGET_OS_MAC) 118 # define OS_CODE 0x07 119 # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os 120 # include <unix.h> /* for fdopen */ 121 # else 122 # ifndef fdopen 123 # define fdopen(fd,mode) NULL /* No fdopen() */ 124 # endif 125 # endif 126 #endif 127 128 #ifdef __50SERIES /* Prime/PRIMOS */ 129 # define OS_CODE 0x0F 130 #endif 131 132 #ifdef TOPS20 133 # define OS_CODE 0x0a 134 #endif 135 136 #if defined(_BEOS_) || defined(RISCOS) 137 # define fdopen(fd,mode) NULL /* No fdopen() */ 138 #endif 139 140 #if (defined(_MSC_VER) && (_MSC_VER > 600)) 141 # define fdopen(fd,type) _fdopen(fd,type) 142 #endif 143 144 145 /* Common defaults */ 146 147 #ifndef OS_CODE 148 # define OS_CODE 0x03 /* assume Unix */ 149 #endif 150 151 #ifndef F_OPEN 152 # define F_OPEN(name, mode) fopen((name), (mode)) 153 #endif 154 155 /* functions */ 156 157 #ifdef HAVE_STRERROR 158 extern char *strerror OF((int)); 159 # define zstrerror(errnum) strerror(errnum) 160 #else 161 # define zstrerror(errnum) "" 162 #endif 163 164 #if defined(pyr) 165 # define NO_MEMCPY 166 #endif 167 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__) 168 /* Use our own functions for small and medium model with MSC <= 5.0. 169 * You may have to use the same strategy for Borland C (untested). 170 * The __SC__ check is for Symantec. 171 */ 172 # define NO_MEMCPY 173 #endif 174 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY) 175 # define HAVE_MEMCPY 176 #endif 177 #ifdef HAVE_MEMCPY 178 # ifdef SMALL_MEDIUM /* MSDOS small or medium model */ 179 # define zmemcpy _fmemcpy 180 # define zmemcmp _fmemcmp 181 # define zmemzero(dest, len) _fmemset(dest, 0, len) 182 # else 183 # define zmemcpy memcpy 184 # define zmemcmp memcmp 185 # define zmemzero(dest, len) memset(dest, 0, len) 186 # endif 187 #else 188 extern void zmemcpy OF((Bytef* dest, const Bytef* source, uInt len)); 189 extern int zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len)); 190 extern void zmemzero OF((Bytef* dest, uInt len)); 191 #endif 192 193 /* Diagnostic functions */ 194 #ifdef DEBUG 195 extern int z_verbose; 196 extern void z_error OF((char *m)); 197 # define z_error panic 198 # define Assert(cond,msg) {if(!(cond)) z_error(msg);} 199 # define Trace(x) {if (z_verbose>=0) printf x ;} 200 # define Tracev(x) {if (z_verbose>0) printf x ;} 201 # define Tracevv(x) {if (z_verbose>1) printf x ;} 202 # define Tracec(c,x) {if (z_verbose>0 && (c)) printf x ;} 203 # define Tracecv(c,x) {if (z_verbose>1 && (c)) printf x ;} 204 #else 205 # define Assert(cond,msg) 206 # define Trace(x) 207 # define Tracev(x) 208 # define Tracevv(x) 209 # define Tracec(c,x) 210 # define Tracecv(c,x) 211 #endif 212 213 214 typedef uLong (ZEXPORT *check_func) OF((uLong check, const Bytef *buf, 215 uInt len)); 216 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size)); 217 void zcfree OF((voidpf opaque, voidpf ptr)); 218 219 #define ZALLOC(strm, items, size) \ 220 (*((strm)->zalloc))((strm)->opaque, (items), (size)) 221 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr)) 222 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);} 223 224 #endif /* _Z_UTIL_H */ 225