1 /* zutil.h -- internal interface and configuration of the compression library 2 * Copyright (C) 1995-2022 Jean-loup Gailly, Mark Adler 3 * For conditions of distribution and use, see copyright notice in zlib.h 4 */ 5 6 /* 7 * Copyright 2026 Oxide Computer Company 8 */ 9 10 /* WARNING: this file should *not* be used by applications. It is 11 part of the implementation of the compression library and is 12 subject to change. Applications should only use zlib.h. 13 */ 14 15 #ifndef ZUTIL_H 16 #define ZUTIL_H 17 18 #ifdef HAVE_HIDDEN 19 # define ZLIB_INTERNAL __attribute__((visibility ("hidden"))) 20 #else 21 # define ZLIB_INTERNAL 22 #endif 23 24 #include "zlib.h" 25 26 #if defined(STDC) && !defined(Z_SOLO) && !defined(_KERNEL) 27 # if !(defined(_WIN32_WCE) && defined(_MSC_VER)) 28 # include <stddef.h> 29 # endif 30 # include <string.h> 31 # include <stdlib.h> 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 (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[Z_NEED_DICT-(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 69 #ifndef DEF_WBITS 70 # define DEF_WBITS MAX_WBITS 71 #endif 72 /* default windowBits for decompression. MAX_WBITS is for compression only */ 73 74 #if MAX_MEM_LEVEL >= 8 75 # define DEF_MEM_LEVEL 8 76 #else 77 # define DEF_MEM_LEVEL MAX_MEM_LEVEL 78 #endif 79 /* default memLevel */ 80 81 #define STORED_BLOCK 0 82 #define STATIC_TREES 1 83 #define DYN_TREES 2 84 /* The three kinds of block type */ 85 86 #define MIN_MATCH 3 87 #define MAX_MATCH 258 88 /* The minimum and maximum match lengths */ 89 90 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */ 91 92 /* target dependencies */ 93 94 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32)) 95 # define OS_CODE 0x00 96 # ifndef Z_SOLO 97 # if defined(__TURBOC__) || defined(__BORLANDC__) 98 # if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__)) 99 /* Allow compilation with ANSI keywords only enabled */ 100 void _Cdecl farfree( void *block ); 101 void *_Cdecl farmalloc( unsigned long nbytes ); 102 # else 103 # include <alloc.h> 104 # endif 105 # else /* MSC or DJGPP */ 106 # include <malloc.h> 107 # endif 108 # endif 109 #endif 110 111 #ifdef AMIGA 112 # define OS_CODE 1 113 #endif 114 115 #if defined(VAXC) || defined(VMS) 116 # define OS_CODE 2 117 # define F_OPEN(name, mode) \ 118 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512") 119 #endif 120 121 #ifdef __370__ 122 # if __TARGET_LIB__ < 0x20000000 123 # define OS_CODE 4 124 # elif __TARGET_LIB__ < 0x40000000 125 # define OS_CODE 11 126 # else 127 # define OS_CODE 8 128 # endif 129 #endif 130 131 #if defined(ATARI) || defined(atarist) 132 # define OS_CODE 5 133 #endif 134 135 #ifdef OS2 136 # define OS_CODE 6 137 # if defined(M_I86) && !defined(Z_SOLO) 138 # include <malloc.h> 139 # endif 140 #endif 141 142 #if defined(MACOS) || defined(TARGET_OS_MAC) 143 # define OS_CODE 7 144 # ifndef Z_SOLO 145 # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os 146 # include <unix.h> /* for fdopen */ 147 # else 148 # ifndef fdopen 149 # define fdopen(fd,mode) NULL /* No fdopen() */ 150 # endif 151 # endif 152 # endif 153 #endif 154 155 #ifdef __acorn 156 # define OS_CODE 13 157 #endif 158 159 #if defined(WIN32) && !defined(__CYGWIN__) 160 # define OS_CODE 10 161 #endif 162 163 #ifdef _BEOS_ 164 # define OS_CODE 16 165 #endif 166 167 #ifdef __TOS_OS400__ 168 # define OS_CODE 18 169 #endif 170 171 #ifdef __APPLE__ 172 # define OS_CODE 19 173 #endif 174 175 #if defined(_BEOS_) || defined(RISCOS) 176 # define fdopen(fd,mode) NULL /* No fdopen() */ 177 #endif 178 179 #if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX 180 # if defined(_WIN32_WCE) 181 # define fdopen(fd,mode) NULL /* No fdopen() */ 182 # else 183 # define fdopen(fd,type) _fdopen(fd,type) 184 # endif 185 #endif 186 187 #if defined(__BORLANDC__) && !defined(MSDOS) 188 #pragma warn -8004 189 #pragma warn -8008 190 #pragma warn -8066 191 #endif 192 193 /* provide prototypes for these when building zlib without LFS */ 194 #if !defined(_WIN32) && \ 195 (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0) 196 ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t)); 197 ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t)); 198 #endif 199 200 /* common defaults */ 201 202 #ifndef OS_CODE 203 # define OS_CODE 3 /* assume Unix */ 204 #endif 205 206 #ifndef F_OPEN 207 # define F_OPEN(name, mode) fopen((name), (mode)) 208 #endif 209 210 /* functions */ 211 212 #if defined(pyr) || defined(Z_SOLO) 213 # define NO_MEMCPY 214 #endif 215 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__) 216 /* Use our own functions for small and medium model with MSC <= 5.0. 217 * You may have to use the same strategy for Borland C (untested). 218 * The __SC__ check is for Symantec. 219 */ 220 # define NO_MEMCPY 221 #endif 222 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY) 223 # define HAVE_MEMCPY 224 #endif 225 #ifdef HAVE_MEMCPY 226 # ifdef SMALL_MEDIUM /* MSDOS small or medium model */ 227 # define zmemcpy _fmemcpy 228 # define zmemcmp _fmemcmp 229 # define zmemzero(dest, len) _fmemset(dest, 0, len) 230 # else 231 # define zmemcpy memcpy 232 # define zmemcmp memcmp 233 # define zmemzero(dest, len) memset(dest, 0, len) 234 # endif 235 #else 236 void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len)); 237 int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len)); 238 void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len)); 239 #endif 240 241 /* Diagnostic functions */ 242 #ifdef ZLIB_DEBUG 243 # include <stdio.h> 244 extern int ZLIB_INTERNAL z_verbose; 245 extern void ZLIB_INTERNAL z_error OF((char *m)); 246 # define Assert(cond,msg) {if(!(cond)) z_error(msg);} 247 # define Trace(x) {if (z_verbose>=0) fprintf x ;} 248 # define Tracev(x) {if (z_verbose>0) fprintf x ;} 249 # define Tracevv(x) {if (z_verbose>1) fprintf x ;} 250 # define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;} 251 # define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;} 252 #else 253 # define Assert(cond,msg) 254 # define Trace(x) 255 # define Tracev(x) 256 # define Tracevv(x) 257 # define Tracec(c,x) 258 # define Tracecv(c,x) 259 #endif 260 261 #ifndef Z_SOLO 262 voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items, 263 unsigned size)); 264 void ZLIB_INTERNAL zcfree OF((voidpf opaque, voidpf ptr)); 265 266 /* KM_SLEEP variant used by kernel callers that need to block for memory */ 267 voidpf ZLIB_INTERNAL zcalloc_sleep OF((voidpf opaque, unsigned items, 268 unsigned size)); 269 #endif 270 271 #define ZALLOC(strm, items, size) \ 272 (*((strm)->zalloc))((strm)->opaque, (items), (size)) 273 #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr)) 274 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);} 275 276 /* Reverse the bytes in a 32-bit value */ 277 #define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \ 278 (((q) & 0xff00) << 8) + (((q) & 0xff) << 24)) 279 280 #endif /* ZUTIL_H */ 281