1 /* zutil.h -- internal interface and configuration of the compression library 2 * Copyright (C) 1995-2024 Jean-loup Gailly, Mark Adler 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 /* @(#) $Id$ */ 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 #if defined(STDC) && !defined(Z_SOLO) 25 # if !(defined(_WIN32_WCE) && defined(_MSC_VER)) 26 # include <stddef.h> 27 # endif 28 # include <string.h> 29 # include <stdlib.h> 30 #endif 31 32 #ifndef local 33 # define local static 34 #endif 35 /* since "static" is used to mean two completely different things in C, we 36 define "local" for the non-static meaning of "static", for readability 37 (compile with -Dlocal if your debugger can't find static symbols) */ 38 39 typedef unsigned char uch; 40 typedef uch FAR uchf; 41 typedef unsigned short ush; 42 typedef ush FAR ushf; 43 typedef unsigned long ulg; 44 45 #if !defined(Z_U8) && !defined(Z_SOLO) && defined(STDC) 46 # include <limits.h> 47 # if (ULONG_MAX == 0xffffffffffffffff) 48 # define Z_U8 unsigned long 49 # elif (ULLONG_MAX == 0xffffffffffffffff) 50 # define Z_U8 unsigned long long 51 # elif (ULONG_LONG_MAX == 0xffffffffffffffff) 52 # define Z_U8 unsigned long long 53 # elif (UINT_MAX == 0xffffffffffffffff) 54 # define Z_U8 unsigned 55 # endif 56 #endif 57 58 extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */ 59 /* (size given to avoid silly warnings with Visual C++) */ 60 61 #define ERR_MSG(err) z_errmsg[(err) < -6 || (err) > 2 ? 9 : 2 - (err)] 62 63 #define ERR_RETURN(strm,err) \ 64 return (strm->msg = ERR_MSG(err), (err)) 65 /* To be used only when the state is known to be valid */ 66 67 /* common constants */ 68 #if MAX_WBITS < 9 || MAX_WBITS > 15 69 # error MAX_WBITS must be in 9..15 70 #endif 71 #ifndef DEF_WBITS 72 # define DEF_WBITS MAX_WBITS 73 #endif 74 /* default windowBits for decompression. MAX_WBITS is for compression only */ 75 76 #if MAX_MEM_LEVEL >= 8 77 # define DEF_MEM_LEVEL 8 78 #else 79 # define DEF_MEM_LEVEL MAX_MEM_LEVEL 80 #endif 81 /* default memLevel */ 82 83 #define STORED_BLOCK 0 84 #define STATIC_TREES 1 85 #define DYN_TREES 2 86 /* The three kinds of block type */ 87 88 #define MIN_MATCH 3 89 #define MAX_MATCH 258 90 /* The minimum and maximum match lengths */ 91 92 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */ 93 94 /* target dependencies */ 95 96 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32)) 97 # define OS_CODE 0x00 98 # ifndef Z_SOLO 99 # if defined(__TURBOC__) || defined(__BORLANDC__) 100 # if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__)) 101 /* Allow compilation with ANSI keywords only enabled */ 102 void _Cdecl farfree( void *block ); 103 void *_Cdecl farmalloc( unsigned long nbytes ); 104 # else 105 # include <alloc.h> 106 # endif 107 # else /* MSC or DJGPP */ 108 # include <malloc.h> 109 # endif 110 # endif 111 #endif 112 113 #ifdef AMIGA 114 # define OS_CODE 1 115 #endif 116 117 #if defined(VAXC) || defined(VMS) 118 # define OS_CODE 2 119 # define F_OPEN(name, mode) \ 120 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512") 121 #endif 122 123 #ifdef __370__ 124 # if __TARGET_LIB__ < 0x20000000 125 # define OS_CODE 4 126 # elif __TARGET_LIB__ < 0x40000000 127 # define OS_CODE 11 128 # else 129 # define OS_CODE 8 130 # endif 131 #endif 132 133 #if defined(ATARI) || defined(atarist) 134 # define OS_CODE 5 135 #endif 136 137 #ifdef OS2 138 # define OS_CODE 6 139 # if defined(M_I86) && !defined(Z_SOLO) 140 # include <malloc.h> 141 # endif 142 #endif 143 144 #if defined(MACOS) 145 # define OS_CODE 7 146 #endif 147 148 #if defined(__acorn) || defined(__riscos) 149 # define OS_CODE 13 150 #endif 151 152 #if defined(WIN32) && !defined(__CYGWIN__) 153 # define OS_CODE 10 154 #endif 155 156 #ifdef _BEOS_ 157 # define OS_CODE 16 158 #endif 159 160 #ifdef __TOS_OS400__ 161 # define OS_CODE 18 162 #endif 163 164 #ifdef __APPLE__ 165 # define OS_CODE 19 166 #endif 167 168 #if defined(__BORLANDC__) && !defined(MSDOS) 169 #pragma warn -8004 170 #pragma warn -8008 171 #pragma warn -8066 172 #endif 173 174 /* provide prototypes for these when building zlib without LFS */ 175 #ifndef Z_LARGE64 176 ZEXTERN uLong ZEXPORT adler32_combine64(uLong, uLong, z_off64_t); 177 ZEXTERN uLong ZEXPORT crc32_combine64(uLong, uLong, z_off64_t); 178 ZEXTERN uLong ZEXPORT crc32_combine_gen64(z_off64_t); 179 #endif 180 181 /* common defaults */ 182 183 #ifndef OS_CODE 184 # define OS_CODE 3 /* assume Unix */ 185 #endif 186 187 #ifndef F_OPEN 188 # define F_OPEN(name, mode) fopen((name), (mode)) 189 #endif 190 191 /* functions */ 192 193 #if defined(pyr) || defined(Z_SOLO) 194 # define NO_MEMCPY 195 #endif 196 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__) 197 /* Use our own functions for small and medium model with MSC <= 5.0. 198 * You may have to use the same strategy for Borland C (untested). 199 * The __SC__ check is for Symantec. 200 */ 201 # define NO_MEMCPY 202 #endif 203 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY) 204 # define HAVE_MEMCPY 205 #endif 206 #ifdef HAVE_MEMCPY 207 # ifdef SMALL_MEDIUM /* MSDOS small or medium model */ 208 # define zmemcpy _fmemcpy 209 # define zmemcmp _fmemcmp 210 # define zmemzero(dest, len) _fmemset(dest, 0, len) 211 # else 212 # define zmemcpy memcpy 213 # define zmemcmp memcmp 214 # define zmemzero(dest, len) memset(dest, 0, len) 215 # endif 216 #else 217 void ZLIB_INTERNAL zmemcpy(Bytef* dest, const Bytef* source, uInt len); 218 int ZLIB_INTERNAL zmemcmp(const Bytef* s1, const Bytef* s2, uInt len); 219 void ZLIB_INTERNAL zmemzero(Bytef* dest, uInt len); 220 #endif 221 222 /* Diagnostic functions */ 223 #ifdef ZLIB_DEBUG 224 # include <stdio.h> 225 extern int ZLIB_INTERNAL z_verbose; 226 extern void ZLIB_INTERNAL z_error(char *m); 227 # define Assert(cond,msg) {if(!(cond)) z_error(msg);} 228 # define Trace(x) {if (z_verbose>=0) fprintf x ;} 229 # define Tracev(x) {if (z_verbose>0) fprintf x ;} 230 # define Tracevv(x) {if (z_verbose>1) fprintf x ;} 231 # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;} 232 # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;} 233 #else 234 # define Assert(cond,msg) 235 # define Trace(x) 236 # define Tracev(x) 237 # define Tracevv(x) 238 # define Tracec(c,x) 239 # define Tracecv(c,x) 240 #endif 241 242 #ifndef Z_SOLO 243 voidpf ZLIB_INTERNAL zcalloc(voidpf opaque, unsigned items, 244 unsigned size); 245 void ZLIB_INTERNAL zcfree(voidpf opaque, voidpf ptr); 246 #endif 247 248 #define ZALLOC(strm, items, size) \ 249 (*((strm)->zalloc))((strm)->opaque, (items), (size)) 250 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr)) 251 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);} 252 253 /* Reverse the bytes in a 32-bit value */ 254 #define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \ 255 (((q) & 0xff00) << 8) + (((q) & 0xff) << 24)) 256 257 #endif /* ZUTIL_H */ 258