1 /* $OpenBSD: zutil.h,v 1.11 2021/07/04 17:41:23 tb Exp $ */ 2 3 /* zutil.h -- internal interface and configuration of the compression library 4 * Copyright (C) 1995-2016 Jean-loup Gailly, Mark Adler 5 * For conditions of distribution and use, see copyright notice in zlib.h 6 */ 7 8 /* WARNING: this file should *not* be used by applications. It is 9 part of the implementation of the compression library and is 10 subject to change. Applications should only use zlib.h. 11 */ 12 13 #ifndef ZUTIL_H 14 #define ZUTIL_H 15 16 #ifdef HAVE_HIDDEN 17 # define ZLIB_INTERNAL __attribute__((visibility ("hidden"))) 18 #else 19 # define ZLIB_INTERNAL 20 #endif 21 22 #include "zlib.h" 23 24 #ifdef _STANDALONE 25 #include <stand.h> 26 #else 27 #if defined(STDC) && !defined(Z_SOLO) 28 # if !(defined(_WIN32_WCE) && defined(_MSC_VER)) 29 # include <stddef.h> 30 # endif 31 # include <string.h> 32 # include <stdlib.h> 33 #endif 34 #endif 35 36 #ifdef Z_SOLO 37 typedef long ptrdiff_t; /* guess -- will be caught if guess is wrong */ 38 #endif 39 40 #ifndef local 41 # define local static 42 #endif 43 /* since "static" is used to mean two completely different things in C, we 44 define "local" for the non-static meaning of "static", for readability 45 (compile with -Dlocal if your debugger can't find static symbols) */ 46 47 typedef unsigned char uch; 48 typedef uch FAR uchf; 49 typedef unsigned short ush; 50 typedef ush FAR ushf; 51 typedef unsigned long ulg; 52 53 extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */ 54 /* (size given to avoid silly warnings with Visual C++) */ 55 56 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)] 57 58 #define ERR_RETURN(strm,err) \ 59 return (strm->msg = ERR_MSG(err), (err)) 60 /* To be used only when the state is known to be valid */ 61 62 /* common constants */ 63 64 #ifndef DEF_WBITS 65 # define DEF_WBITS MAX_WBITS 66 #endif 67 /* default windowBits for decompression. MAX_WBITS is for compression only */ 68 69 #if MAX_MEM_LEVEL >= 8 70 # define DEF_MEM_LEVEL 8 71 #else 72 # define DEF_MEM_LEVEL MAX_MEM_LEVEL 73 #endif 74 /* default memLevel */ 75 76 #define STORED_BLOCK 0 77 #define STATIC_TREES 1 78 #define DYN_TREES 2 79 /* The three kinds of block type */ 80 81 #define MIN_MATCH 3 82 #define MAX_MATCH 258 83 /* The minimum and maximum match lengths */ 84 85 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */ 86 87 /* target dependencies */ 88 89 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32)) 90 # define OS_CODE 0x00 91 # ifndef Z_SOLO 92 # if defined(__TURBOC__) || defined(__BORLANDC__) 93 # if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__)) 94 /* Allow compilation with ANSI keywords only enabled */ 95 void _Cdecl farfree( void *block ); 96 void *_Cdecl farmalloc( unsigned long nbytes ); 97 # else 98 # include <alloc.h> 99 # endif 100 # else /* MSC or DJGPP */ 101 # include <malloc.h> 102 # endif 103 # endif 104 #endif 105 106 #ifdef AMIGA 107 # define OS_CODE 1 108 #endif 109 110 #if defined(VAXC) || defined(VMS) 111 # define OS_CODE 2 112 # define F_OPEN(name, mode) \ 113 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512") 114 #endif 115 116 #ifdef __370__ 117 # if __TARGET_LIB__ < 0x20000000 118 # define OS_CODE 4 119 # elif __TARGET_LIB__ < 0x40000000 120 # define OS_CODE 11 121 # else 122 # define OS_CODE 8 123 # endif 124 #endif 125 126 #if defined(ATARI) || defined(atarist) 127 # define OS_CODE 5 128 #endif 129 130 #ifdef OS2 131 # define OS_CODE 6 132 # if defined(M_I86) && !defined(Z_SOLO) 133 # include <malloc.h> 134 # endif 135 #endif 136 137 #if defined(MACOS) || defined(TARGET_OS_MAC) 138 # define OS_CODE 7 139 # ifndef Z_SOLO 140 # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os 141 # include <unix.h> /* for fdopen */ 142 # else 143 # ifndef fdopen 144 # define fdopen(fd,mode) NULL /* No fdopen() */ 145 # endif 146 # endif 147 # endif 148 #endif 149 150 #ifdef __acorn 151 # define OS_CODE 13 152 #endif 153 154 #if defined(WIN32) && !defined(__CYGWIN__) 155 # define OS_CODE 10 156 #endif 157 158 #ifdef _BEOS_ 159 # define OS_CODE 16 160 #endif 161 162 #ifdef __TOS_OS400__ 163 # define OS_CODE 18 164 #endif 165 166 #ifdef __APPLE__ 167 # define OS_CODE 19 168 #endif 169 170 #if defined(_BEOS_) || defined(RISCOS) 171 # define fdopen(fd,mode) NULL /* No fdopen() */ 172 #endif 173 174 #if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX 175 # if defined(_WIN32_WCE) 176 # define fdopen(fd,mode) NULL /* No fdopen() */ 177 # ifndef _PTRDIFF_T_DEFINED 178 typedef int ptrdiff_t; 179 # define _PTRDIFF_T_DEFINED 180 # endif 181 # else 182 # define fdopen(fd,type) _fdopen(fd,type) 183 # endif 184 #endif 185 186 #if defined(__BORLANDC__) && !defined(MSDOS) 187 #pragma warn -8004 188 #pragma warn -8008 189 #pragma warn -8066 190 #endif 191 192 /* provide prototypes for these when building zlib without LFS */ 193 #if !defined(_WIN32) && \ 194 (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0) 195 ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t)); 196 ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t)); 197 #endif 198 199 /* common defaults */ 200 201 #ifndef OS_CODE 202 # define OS_CODE 3 /* assume Unix */ 203 #endif 204 205 #ifndef F_OPEN 206 # define F_OPEN(name, mode) fopen((name), (mode)) 207 #endif 208 209 /* functions */ 210 211 #if defined(pyr) || defined(Z_SOLO) 212 # define NO_MEMCPY 213 #endif 214 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__) 215 /* Use our own functions for small and medium model with MSC <= 5.0. 216 * You may have to use the same strategy for Borland C (untested). 217 * The __SC__ check is for Symantec. 218 */ 219 # define NO_MEMCPY 220 #endif 221 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY) 222 # define HAVE_MEMCPY 223 #endif 224 #ifdef HAVE_MEMCPY 225 # ifdef SMALL_MEDIUM /* MSDOS small or medium model */ 226 # define zmemcpy _fmemcpy 227 # define zmemcmp _fmemcmp 228 # define zmemzero(dest, len) _fmemset(dest, 0, len) 229 # else 230 # define zmemcpy memcpy 231 # define zmemcmp memcmp 232 # define zmemzero(dest, len) memset(dest, 0, len) 233 # endif 234 #else 235 void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len)); 236 int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len)); 237 void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len)); 238 #endif 239 240 /* Diagnostic functions */ 241 #ifdef ZLIB_DEBUG 242 # include <stdio.h> 243 extern int ZLIB_INTERNAL z_verbose; 244 extern void ZLIB_INTERNAL z_error OF((char *m)); 245 # define Assert(cond,msg) {if(!(cond)) z_error(msg);} 246 # define Trace(x) {if (z_verbose>=0) fprintf x ;} 247 # define Tracev(x) {if (z_verbose>0) fprintf x ;} 248 # define Tracevv(x) {if (z_verbose>1) fprintf x ;} 249 # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;} 250 # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;} 251 #else 252 # define Assert(cond,msg) 253 # define Trace(x) 254 # define Tracev(x) 255 # define Tracevv(x) 256 # define Tracec(c,x) 257 # define Tracecv(c,x) 258 #endif 259 260 #ifndef Z_SOLO 261 voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items, 262 unsigned size)); 263 void ZLIB_INTERNAL zcfree OF((voidpf opaque, voidpf ptr)); 264 #endif 265 266 #define ZALLOC(strm, items, size) \ 267 (*((strm)->zalloc))((strm)->opaque, (items), (size)) 268 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr)) 269 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);} 270 271 /* Reverse the bytes in a 32-bit value */ 272 #define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \ 273 (((q) & 0xff00) << 8) + (((q) & 0xff) << 24)) 274 275 #endif /* ZUTIL_H */ 276