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 #ifndef ZUTIL_H 12 #define ZUTIL_H 13 14 #ifdef HAVE_HIDDEN 15 # define ZLIB_INTERNAL __attribute__((visibility ("hidden"))) 16 #else 17 # define ZLIB_INTERNAL 18 #endif 19 20 #include "zlib.h" 21 22 #ifdef _STANDALONE 23 #include <stand.h> 24 #else 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 #endif 33 34 #ifndef local 35 # define local static 36 #endif 37 /* since "static" is used to mean two completely different things in C, we 38 define "local" for the non-static meaning of "static", for readability 39 (compile with -Dlocal if your debugger can't find static symbols) */ 40 41 typedef unsigned char uch; 42 typedef uch FAR uchf; 43 typedef unsigned short ush; 44 typedef ush FAR ushf; 45 typedef unsigned long ulg; 46 47 #if !defined(Z_U8) && !defined(Z_SOLO) && defined(STDC) 48 # include <limits.h> 49 # if (ULONG_MAX == 0xffffffffffffffff) 50 # define Z_U8 unsigned long 51 # elif (ULLONG_MAX == 0xffffffffffffffff) 52 # define Z_U8 unsigned long long 53 # elif (ULONG_LONG_MAX == 0xffffffffffffffff) 54 # define Z_U8 unsigned long long 55 # elif (UINT_MAX == 0xffffffffffffffff) 56 # define Z_U8 unsigned 57 # endif 58 #endif 59 60 extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */ 61 /* (size given to avoid silly warnings with Visual C++) */ 62 63 #define ERR_MSG(err) z_errmsg[(err) < -6 || (err) > 2 ? 9 : 2 - (err)] 64 65 #define ERR_RETURN(strm,err) \ 66 return (strm->msg = ERR_MSG(err), (err)) 67 /* To be used only when the state is known to be valid */ 68 69 /* common constants */ 70 #if MAX_WBITS < 9 || MAX_WBITS > 15 71 # error MAX_WBITS must be in 9..15 72 #endif 73 #ifndef DEF_WBITS 74 # define DEF_WBITS MAX_WBITS 75 #endif 76 /* default windowBits for decompression. MAX_WBITS is for compression only */ 77 78 #if MAX_MEM_LEVEL >= 8 79 # define DEF_MEM_LEVEL 8 80 #else 81 # define DEF_MEM_LEVEL MAX_MEM_LEVEL 82 #endif 83 /* default memLevel */ 84 85 #define STORED_BLOCK 0 86 #define STATIC_TREES 1 87 #define DYN_TREES 2 88 /* The three kinds of block type */ 89 90 #define MIN_MATCH 3 91 #define MAX_MATCH 258 92 /* The minimum and maximum match lengths */ 93 94 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */ 95 96 /* target dependencies */ 97 98 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32)) 99 # define OS_CODE 0x00 100 # ifndef Z_SOLO 101 # if defined(__TURBOC__) || defined(__BORLANDC__) 102 # if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__)) 103 /* Allow compilation with ANSI keywords only enabled */ 104 void _Cdecl farfree( void *block ); 105 void *_Cdecl farmalloc( unsigned long nbytes ); 106 # else 107 # include <alloc.h> 108 # endif 109 # else /* MSC or DJGPP */ 110 # include <malloc.h> 111 # endif 112 # endif 113 #endif 114 115 #ifdef AMIGA 116 # define OS_CODE 1 117 #endif 118 119 #if defined(VAXC) || defined(VMS) 120 # define OS_CODE 2 121 # define F_OPEN(name, mode) \ 122 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512") 123 #endif 124 125 #ifdef __370__ 126 # if __TARGET_LIB__ < 0x20000000 127 # define OS_CODE 4 128 # elif __TARGET_LIB__ < 0x40000000 129 # define OS_CODE 11 130 # else 131 # define OS_CODE 8 132 # endif 133 #endif 134 135 #if defined(ATARI) || defined(atarist) 136 # define OS_CODE 5 137 #endif 138 139 #ifdef OS2 140 # define OS_CODE 6 141 # if defined(M_I86) && !defined(Z_SOLO) 142 # include <malloc.h> 143 # endif 144 #endif 145 146 #if defined(MACOS) 147 # define OS_CODE 7 148 #endif 149 150 #if defined(__acorn) || defined(__riscos) 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(__BORLANDC__) && !defined(MSDOS) 171 #pragma warn -8004 172 #pragma warn -8008 173 #pragma warn -8066 174 #endif 175 176 /* provide prototypes for these when building zlib without LFS */ 177 #ifndef Z_LARGE64 178 ZEXTERN uLong ZEXPORT adler32_combine64(uLong, uLong, z_off64_t); 179 ZEXTERN uLong ZEXPORT crc32_combine64(uLong, uLong, z_off64_t); 180 ZEXTERN uLong ZEXPORT crc32_combine_gen64(z_off64_t); 181 #endif 182 183 /* common defaults */ 184 185 #ifndef OS_CODE 186 # define OS_CODE 3 /* assume Unix */ 187 #endif 188 189 #ifndef F_OPEN 190 # define F_OPEN(name, mode) fopen((name), (mode)) 191 #endif 192 193 /* functions */ 194 195 #if defined(pyr) || defined(Z_SOLO) 196 # define NO_MEMCPY 197 #endif 198 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__) 199 /* Use our own functions for small and medium model with MSC <= 5.0. 200 * You may have to use the same strategy for Borland C (untested). 201 * The __SC__ check is for Symantec. 202 */ 203 # define NO_MEMCPY 204 #endif 205 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY) 206 # define HAVE_MEMCPY 207 #endif 208 #ifdef HAVE_MEMCPY 209 # ifdef SMALL_MEDIUM /* MSDOS small or medium model */ 210 # define zmemcpy _fmemcpy 211 # define zmemcmp _fmemcmp 212 # define zmemzero(dest, len) _fmemset(dest, 0, len) 213 # else 214 # define zmemcpy memcpy 215 # define zmemcmp memcmp 216 # define zmemzero(dest, len) memset(dest, 0, len) 217 # endif 218 #else 219 void ZLIB_INTERNAL zmemcpy(Bytef* dest, const Bytef* source, uInt len); 220 int ZLIB_INTERNAL zmemcmp(const Bytef* s1, const Bytef* s2, uInt len); 221 void ZLIB_INTERNAL zmemzero(Bytef* dest, uInt len); 222 #endif 223 224 /* Diagnostic functions */ 225 #ifdef ZLIB_DEBUG 226 # include <stdio.h> 227 extern int ZLIB_INTERNAL z_verbose; 228 extern void ZLIB_INTERNAL z_error(char *m); 229 # define Assert(cond,msg) {if(!(cond)) z_error(msg);} 230 # define Trace(x) {if (z_verbose>=0) fprintf x ;} 231 # define Tracev(x) {if (z_verbose>0) fprintf x ;} 232 # define Tracevv(x) {if (z_verbose>1) fprintf x ;} 233 # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;} 234 # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;} 235 #else 236 # define Assert(cond,msg) 237 # define Trace(x) 238 # define Tracev(x) 239 # define Tracevv(x) 240 # define Tracec(c,x) 241 # define Tracecv(c,x) 242 #endif 243 244 #ifndef Z_SOLO 245 voidpf ZLIB_INTERNAL zcalloc(voidpf opaque, unsigned items, 246 unsigned size); 247 void ZLIB_INTERNAL zcfree(voidpf opaque, voidpf ptr); 248 #endif 249 250 #define ZALLOC(strm, items, size) \ 251 (*((strm)->zalloc))((strm)->opaque, (items), (size)) 252 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr)) 253 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);} 254 255 /* Reverse the bytes in a 32-bit value */ 256 #define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \ 257 (((q) & 0xff00) << 8) + (((q) & 0xff) << 24)) 258 259 #endif /* ZUTIL_H */ 260