1 /* SPDX-License-Identifier: Zlib */ 2 /* zutil.h -- internal interface and configuration of the compression library 3 * Copyright (C) 1995-2022 Jean-loup Gailly, Mark Adler 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 /* @(#) $Id$ */ 13 14 #ifndef ZUTIL_H 15 #define ZUTIL_H 16 17 #ifdef HAVE_HIDDEN 18 # define ZLIB_INTERNAL __attribute__((visibility ("hidden"))) 19 #else 20 # define ZLIB_INTERNAL 21 #endif 22 23 #include "zlib.h" 24 25 #if defined(STDC) && !defined(Z_SOLO) 26 # if !(defined(_WIN32_WCE) && defined(_MSC_VER)) 27 # include <stddef.h> 28 # endif 29 # include <string.h> 30 # include <stdlib.h> 31 #endif 32 33 #ifndef local 34 # define local static 35 #endif 36 /* since "static" is used to mean two completely different things in C, we 37 define "local" for the non-static meaning of "static", for readability 38 (compile with -Dlocal if your debugger can't find static symbols) */ 39 40 typedef unsigned char uch; 41 typedef uch FAR uchf; 42 typedef unsigned short ush; 43 typedef ush FAR ushf; 44 typedef unsigned long ulg; 45 46 #if !defined(Z_U8) && !defined(Z_SOLO) && defined(STDC) 47 # include <limits.h> 48 # if (ULONG_MAX == 0xffffffffffffffff) 49 # define Z_U8 unsigned long 50 # elif (ULLONG_MAX == 0xffffffffffffffff) 51 # define Z_U8 unsigned long long 52 # elif (UINT_MAX == 0xffffffffffffffff) 53 # define Z_U8 unsigned 54 # endif 55 #endif 56 57 extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */ 58 /* (size given to avoid silly warnings with Visual C++) */ 59 60 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)] 61 62 #define ERR_RETURN(strm,err) \ 63 return (strm->msg = ERR_MSG(err), (err)) 64 /* To be used only when the state is known to be valid */ 65 66 /* common constants */ 67 68 #ifndef DEF_WBITS 69 # define DEF_WBITS MAX_WBITS 70 #endif 71 /* default windowBits for decompression. MAX_WBITS is for compression only */ 72 73 #if MAX_MEM_LEVEL >= 8 74 # define DEF_MEM_LEVEL 8 75 #else 76 # define DEF_MEM_LEVEL MAX_MEM_LEVEL 77 #endif 78 /* default memLevel */ 79 80 #define STORED_BLOCK 0 81 #define STATIC_TREES 1 82 #define DYN_TREES 2 83 /* The three kinds of block type */ 84 85 #define MIN_MATCH 3 86 #define MAX_MATCH 258 87 /* The minimum and maximum match lengths */ 88 89 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */ 90 91 /* target dependencies */ 92 93 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32)) 94 # define OS_CODE 0x00 95 # ifndef Z_SOLO 96 # if defined(__TURBOC__) || defined(__BORLANDC__) 97 # if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__)) 98 /* Allow compilation with ANSI keywords only enabled */ 99 void _Cdecl farfree( void *block ); 100 void *_Cdecl farmalloc( unsigned long nbytes ); 101 # else 102 # include <alloc.h> 103 # endif 104 # else /* MSC or DJGPP */ 105 # include <malloc.h> 106 # endif 107 # endif 108 #endif 109 110 #ifdef AMIGA 111 # define OS_CODE 1 112 #endif 113 114 #if defined(VAXC) || defined(VMS) 115 # define OS_CODE 2 116 # define F_OPEN(name, mode) \ 117 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512") 118 #endif 119 120 #ifdef __370__ 121 # if __TARGET_LIB__ < 0x20000000 122 # define OS_CODE 4 123 # elif __TARGET_LIB__ < 0x40000000 124 # define OS_CODE 11 125 # else 126 # define OS_CODE 8 127 # endif 128 #endif 129 130 #if defined(ATARI) || defined(atarist) 131 # define OS_CODE 5 132 #endif 133 134 #ifdef OS2 135 # define OS_CODE 6 136 # if defined(M_I86) && !defined(Z_SOLO) 137 # include <malloc.h> 138 # endif 139 #endif 140 141 #if defined(MACOS) || defined(TARGET_OS_MAC) 142 # define OS_CODE 7 143 # ifndef Z_SOLO 144 # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os 145 # include <unix.h> /* for fdopen */ 146 # else 147 # ifndef fdopen 148 # define fdopen(fd,mode) NULL /* No fdopen() */ 149 # endif 150 # endif 151 # endif 152 #endif 153 154 #ifdef __acorn 155 # define OS_CODE 13 156 #endif 157 158 #if defined(WIN32) && !defined(__CYGWIN__) 159 # define OS_CODE 10 160 #endif 161 162 #ifdef _BEOS_ 163 # define OS_CODE 16 164 #endif 165 166 #ifdef __TOS_OS400__ 167 # define OS_CODE 18 168 #endif 169 170 #ifdef __APPLE__ 171 # define OS_CODE 19 172 #endif 173 174 #if defined(_BEOS_) || defined(RISCOS) 175 # define fdopen(fd,mode) NULL /* No fdopen() */ 176 #endif 177 178 #if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX 179 # if defined(_WIN32_WCE) 180 # define fdopen(fd,mode) NULL /* No fdopen() */ 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