zlib/zutil.h

   1 /* zutil.h -- internal interface and configuration of the compression library
   2  * Copyright (C) 1995-2010 Jean-loup Gailly.
   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: zutil.h,v 1.1.1.2 2002/03/11 21:53:28 tromey Exp $ */
  12
  13 #ifndef ZUTIL_H
  14 #define ZUTIL_H
  15
  16 #if ((__GNUC__-0) * 10 + __GNUC_MINOR__-0 >= 33) && !defined(NO_VIZ)
  17 #  define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
  18 #else
  19 #  define ZLIB_INTERNAL
  20 #endif
  21
  22 #include "zlib.h"
  23
  24 #ifdef STDC
  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 /* compile with -Dlocal if your debugger can't find static symbols */
  36
  37 typedef unsigned char  uch;
  38 typedef uch FAR uchf;
  39 typedef unsigned short ush;
  40 typedef ush FAR ushf;
  41 typedef unsigned long  ulg;
  42
  43 extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
  44 /* (size given to avoid silly warnings with Visual C++) */
  45
  46 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
  47
  48 #define ERR_RETURN(strm,err) \
  49   return (strm->msg = (char*)ERR_MSG(err), (err))
  50 /* To be used only when the state is known to be valid */
  51
  52         /* common constants */
  53
  54 #ifndef DEF_WBITS
  55 #  define DEF_WBITS MAX_WBITS
  56 #endif
  57 /* default windowBits for decompression. MAX_WBITS is for compression only */
  58
  59 #if MAX_MEM_LEVEL >= 8
  60 #  define DEF_MEM_LEVEL 8
  61 #else
  62 #  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
  63 #endif
  64 /* default memLevel */
  65
  66 #define STORED_BLOCK 0
  67 #define STATIC_TREES 1
  68 #define DYN_TREES    2
  69 /* The three kinds of block type */
  70
  71 #define MIN_MATCH  3
  72 #define MAX_MATCH  258
  73 /* The minimum and maximum match lengths */
  74
  75 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
  76
  77         /* target dependencies */
  78
  79 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
  80 #  define OS_CODE  0x00
  81 #  if defined(__TURBOC__) || defined(__BORLANDC__)
  82 #    if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
  83        /* Allow compilation with ANSI keywords only enabled */
  84        void _Cdecl farfree( void *block );
  85        void *_Cdecl farmalloc( unsigned long nbytes );
  86 #    else
  87 #      include <alloc.h>
  88 #    endif
  89 #  else /* MSC or DJGPP */
  90 #    include <malloc.h>
  91 #  endif
  92 #endif
  93
  94 #ifdef AMIGA
  95 #  define OS_CODE  0x01
  96 #endif
  97
  98 #if defined(VAXC) || defined(VMS)
  99 #  define OS_CODE  0x02
 100 #  define F_OPEN(name, mode) \
 101      fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
 102 #endif
 103
 104 #if defined(ATARI) || defined(atarist)
 105 #  define OS_CODE  0x05
 106 #endif
 107
 108 #ifdef OS2
 109 #  define OS_CODE  0x06
 110 #  ifdef M_I86
 111 #    include <malloc.h>
 112 #  endif
 113 #endif
 114
 115 #if defined(MACOS) || defined(TARGET_OS_MAC)
 116 #  define OS_CODE  0x07
 117 #  if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
 118 #    include <unix.h> /* for fdopen */
 119 #  else
 120 #    ifndef fdopen
 121 #      define fdopen(fd,mode) NULL /* No fdopen() */
 122 #    endif
 123 #  endif
 124 #endif
 125
 126 #ifdef TOPS20
 127 #  define OS_CODE  0x0a
 128 #endif
 129
 130 #ifdef WIN32
 131 #  ifndef __CYGWIN__  /* Cygwin is Unix, not Win32 */
 132 #    define OS_CODE  0x0b
 133 #  endif
 134 #endif
 135
 136 #ifdef __50SERIES /* Prime/PRIMOS */
 137 #  define OS_CODE  0x0f
 138 #endif
 139
 140 #if defined(_BEOS_) || defined(RISCOS)
 141 #  define fdopen(fd,mode) NULL /* No fdopen() */
 142 #endif
 143
 144 #if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
 145 #  if defined(_WIN32_WCE)
 146 #    define fdopen(fd,mode) NULL /* No fdopen() */
 147 #    ifndef _PTRDIFF_T_DEFINED
 148        typedef int ptrdiff_t;
 149 #      define _PTRDIFF_T_DEFINED
 150 #    endif
 151 #  else
 152 #    define fdopen(fd,type)  _fdopen(fd,type)
 153 #  endif
 154 #endif
 155
 156 #if defined(__BORLANDC__)
 157   #pragma warn -8004
 158   #pragma warn -8008
 159   #pragma warn -8066
 160 #endif
 161
 162 /* provide prototypes for these when building zlib without LFS */
 163 #if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0
 164     ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
 165     ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
 166 #endif
 167
 168         /* common defaults */
 169
 170 #ifndef OS_CODE
 171 #  define OS_CODE  0x03  /* assume Unix */
 172 #endif
 173
 174 #ifndef F_OPEN
 175 #  define F_OPEN(name, mode) fopen((name), (mode))
 176 #endif
 177
 178          /* functions */
 179
 180 #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
 181 #  ifndef HAVE_VSNPRINTF
 182 #    define HAVE_VSNPRINTF
 183 #  endif
 184 #endif
 185 #if defined(__CYGWIN__)
 186 #  ifndef HAVE_VSNPRINTF
 187 #    define HAVE_VSNPRINTF
 188 #  endif
 189 #endif
 190 #ifndef HAVE_VSNPRINTF
 191 #  ifdef MSDOS
 192      /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
 193         but for now we just assume it doesn't. */
 194 #    define NO_vsnprintf
 195 #  endif
 196 #  ifdef __TURBOC__
 197 #    define NO_vsnprintf
 198 #  endif
 199 #  ifdef WIN32
 200      /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
 201 #    if !defined(vsnprintf) && !defined(NO_vsnprintf)
 202 #      if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 )
 203 #         define vsnprintf _vsnprintf
 204 #      endif
 205 #    endif
 206 #  endif
 207 #  ifdef __SASC
 208 #    define NO_vsnprintf
 209 #  endif
 210 #endif
 211 #ifdef VMS
 212 #  define NO_vsnprintf
 213 #endif
 214
 215 #if defined(pyr)
 216 #  define NO_MEMCPY
 217 #endif
 218 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
 219  /* Use our own functions for small and medium model with MSC <= 5.0.
 220   * You may have to use the same strategy for Borland C (untested).
 221   * The __SC__ check is for Symantec.
 222   */
 223 #  define NO_MEMCPY
 224 #endif
 225 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
 226 #  define HAVE_MEMCPY
 227 #endif
 228 #ifdef HAVE_MEMCPY
 229 #  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
 230 #    define zmemcpy _fmemcpy
 231 #    define zmemcmp _fmemcmp
 232 #    define zmemzero(dest, len) _fmemset(dest, 0, len)
 233 #  else
 234 #    define zmemcpy memcpy
 235 #    define zmemcmp memcmp
 236 #    define zmemzero(dest, len) memset(dest, 0, len)
 237 #  endif
 238 #else
 239    void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
 240    int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
 241    void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len));
 242 #endif
 243
 244 /* Diagnostic functions */
 245 #ifdef DEBUG
 246 #  include <stdio.h>
 247    extern int ZLIB_INTERNAL z_verbose;
 248    extern void ZLIB_INTERNAL z_error OF((char *m));
 249 #  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
 250 #  define Trace(x) {if (z_verbose>=0) fprintf x ;}
 251 #  define Tracev(x) {if (z_verbose>0) fprintf x ;}
 252 #  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
 253 #  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
 254 #  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
 255 #else
 256 #  define Assert(cond,msg)
 257 #  define Trace(x)
 258 #  define Tracev(x)
 259 #  define Tracevv(x)
 260 #  define Tracec(c,x)
 261 #  define Tracecv(c,x)
 262 #endif
 263
 264
 265 voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items,
 266                         unsigned size));
 267 void ZLIB_INTERNAL zcfree  OF((voidpf opaque, voidpf ptr));
 268
 269 #define ZALLOC(strm, items, size) \
 270            (*((strm)->zalloc))((strm)->opaque, (items), (size))
 271 #define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
 272 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
 273
 274 #endif /* ZUTIL_H */