support/zutil.h

   1 /* zutil.h -- internal interface and configuration of the compression library
   2  * Copyright (C) 1995-2006 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 /* @(#) $Id$ */
  12
  13 #ifndef ZUTIL_H
  14 #define ZUTIL_H
  15
  16 #define ZLIB_INTERNAL
  17 #include "zlib.h"
  18
  19 #ifdef STDC
  20 #  ifndef _WIN32_WCE
  21 #    include <stddef.h>
  22 #  endif
  23 #  include <string.h>
  24 #  include <stdlib.h>
  25 #endif
  26 #if defined(NO_ERRNO_H) || defined(_WIN32_WCE)
  27 #   ifdef _WIN32_WCE
  28       /* The Microsoft C Run-Time Library for Windows CE doesn't have
  29        * errno.  We define it as a global variable to simplify porting.
  30        * Its value is always 0 and should not be used.  We rename it to
  31        * avoid conflict with other libraries that use the same workaround.
  32        */
  33 #     define errno z_errno
  34 #   endif
  35     extern int errno;
  36 #else
  37 #   include <errno.h>
  38 #endif
  39
  40 #ifndef local
  41 #  define local static
  42 #endif
  43 /* compile with -Dlocal if your debugger can't find static symbols */
  44
  45 typedef unsigned char  uch;
  46 typedef uch FAR uchf;
  47 typedef unsigned short ush;
  48 typedef ush FAR ushf;
  49 typedef unsigned long  ulg;
  50
  51 extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
  52 /* (size given to avoid silly warnings with Visual C++) */
  53
  54 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
  55
  56 #define ERR_RETURN(strm,err) \
  57   return (strm->msg = (char*)ERR_MSG(err), (err))
  58 /* To be used only when the state is known to be valid */
  59
  60         /* common constants */
  61
  62 #ifndef DEF_WBITS
  63 #  define DEF_WBITS MAX_WBITS
  64 #endif
  65 /* default windowBits for decompression. MAX_WBITS is for compression only */
  66
  67 #if MAX_MEM_LEVEL >= 8
  68 #  define DEF_MEM_LEVEL 8
  69 #else
  70 #  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
  71 #endif
  72 /* default memLevel */
  73
  74 #define STORED_BLOCK 0
  75 #define STATIC_TREES 1
  76 #define DYN_TREES    2
  77 /* The three kinds of block type */
  78
  79 #define MIN_MATCH  3
  80 #define MAX_MATCH  258
  81 /* The minimum and maximum match lengths */
  82
  83 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
  84
  85         /* target dependencies */
  86
  87 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
  88 #  define OS_CODE  0x00
  89 #  if defined(__TURBOC__) || defined(__BORLANDC__)
  90 #    if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
  91        /* Allow compilation with ANSI keywords only enabled */
  92        void _Cdecl farfree( void *block );
  93        void *_Cdecl farmalloc( unsigned long nbytes );
  94 #    else
  95 #      include <alloc.h>
  96 #    endif
  97 #  else /* MSC or DJGPP */
  98 #    include <malloc.h>
  99 #  endif
 100 #endif
 101
 102 #ifdef AMIGA
 103 #  define OS_CODE  0x01
 104 #endif
 105
 106 #if defined(VAXC) || defined(VMS)
 107 #  define OS_CODE  0x02
 108 #  define F_OPEN(name, mode) \
 109      fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
 110 #endif
 111
 112 #if defined(ATARI) || defined(atarist)
 113 #  define OS_CODE  0x05
 114 #endif
 115
 116 #ifdef OS2
 117 #  define OS_CODE  0x06
 118 #  ifdef M_I86
 119      #include <malloc.h>
 120 #  endif
 121 #endif
 122
 123 #if defined(MACOS) || defined(TARGET_OS_MAC)
 124 #  define OS_CODE  0x07
 125 #  if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
 126 #    include <unix.h> /* for fdopen */
 127 #  else
 128 #    ifndef fdopen
 129 #      define fdopen(fd,mode) NULL /* No fdopen() */
 130 #    endif
 131 #  endif
 132 #endif
 133
 134 #ifdef TOPS20
 135 #  define OS_CODE  0x0a
 136 #endif
 137
 138 #ifdef WIN32
 139 #  ifndef __CYGWIN__  /* Cygwin is Unix, not Win32 */
 140 #    define OS_CODE  0x0b
 141 #  endif
 142 #endif
 143
 144 #ifdef __50SERIES /* Prime/PRIMOS */
 145 #  define OS_CODE  0x0f
 146 #endif
 147
 148 #if defined(_BEOS_) || defined(RISCOS)
 149 #  define fdopen(fd,mode) NULL /* No fdopen() */
 150 #endif
 151
 152 #if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
 153 #  if defined(_WIN32_WCE)
 154 #    define fdopen(fd,mode) NULL /* No fdopen() */
 155 #    ifndef _PTRDIFF_T_DEFINED
 156        typedef int ptrdiff_t;
 157 #      define _PTRDIFF_T_DEFINED
 158 #    endif
 159 #  else
 160 #    define fdopen(fd,type)  _fdopen(fd,type)
 161 #  endif
 162 #endif
 163
 164 #if defined(__BORLANDC__)
 165 #pragma warn -8004
 166 #pragma warn -8008
 167 #pragma warn -8066
 168 #endif
 169
 170         /* common defaults */
 171
 172 #ifndef OS_CODE
 173 #  define OS_CODE  0x03  /* assume Unix */
 174 #endif
 175
 176 #ifndef F_OPEN
 177 #  define F_OPEN(name, mode) fopen((name), (mode))
 178 #endif
 179
 180 #ifdef _LARGEFILE64_SOURCE
 181 #  define F_OPEN64(name, mode) fopen64((name), (mode))
 182 #else
 183 #  define F_OPEN64(name, mode) fopen((name), (mode))
 184 #endif
 185
 186          /* functions */
 187
 188 #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
 189 #  ifndef HAVE_VSNPRINTF
 190 #    define HAVE_VSNPRINTF
 191 #  endif
 192 #endif
 193 #if defined(__CYGWIN__)
 194 #  ifndef HAVE_VSNPRINTF
 195 #    define HAVE_VSNPRINTF
 196 #  endif
 197 #endif
 198 #ifndef HAVE_VSNPRINTF
 199 #  ifdef MSDOS
 200      /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
 201         but for now we just assume it doesn't. */
 202 #    define NO_vsnprintf
 203 #  endif
 204 #  ifdef __TURBOC__
 205 #    define NO_vsnprintf
 206 #  endif
 207 #  ifdef WIN32
 208      /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
 209 #    if !defined(vsnprintf) && !defined(NO_vsnprintf)
 210 #      define vsnprintf _vsnprintf
 211 #    endif
 212 #  endif
 213 #  ifdef __SASC
 214 #    define NO_vsnprintf
 215 #  endif
 216 #endif
 217 #ifdef VMS
 218 #  define NO_vsnprintf
 219 #endif
 220
 221 #if defined(pyr)
 222 #  define NO_MEMCPY
 223 #endif
 224 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
 225  /* Use our own functions for small and medium model with MSC <= 5.0.
 226   * You may have to use the same strategy for Borland C (untested).
 227   * The __SC__ check is for Symantec.
 228   */
 229 #  define NO_MEMCPY
 230 #endif
 231 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
 232 #  define HAVE_MEMCPY
 233 #endif
 234 #ifdef HAVE_MEMCPY
 235 #  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
 236 #    define zmemcpy _fmemcpy
 237 #    define zmemcmp _fmemcmp
 238 #    define zmemzero(dest, len) _fmemset(dest, 0, len)
 239 #  else
 240 #    define zmemcpy memcpy
 241 #    define zmemcmp memcmp
 242 #    define zmemzero(dest, len) memset(dest, 0, len)
 243 #  endif
 244 #else
 245    extern void zmemcpy  OF((Bytef* dest, const Bytef* source, uInt len));
 246    extern int  zmemcmp  OF((const Bytef* s1, const Bytef* s2, uInt len));
 247    extern void zmemzero OF((Bytef* dest, uInt len));
 248 #endif
 249
 250 /* Diagnostic functions */
 251 #ifdef DEBUG
 252 #  include <stdio.h>
 253    extern int z_verbose;
 254    extern void z_error    OF((char *m));
 255 #  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
 256 #  define Trace(x) {if (z_verbose>=0) fprintf x ;}
 257 #  define Tracev(x) {if (z_verbose>0) fprintf x ;}
 258 #  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
 259 #  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
 260 #  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
 261 #else
 262 #  define Assert(cond,msg)
 263 #  define Trace(x)
 264 #  define Tracev(x)
 265 #  define Tracevv(x)
 266 #  define Tracec(c,x)
 267 #  define Tracecv(c,x)
 268 #endif
 269
 270
 271 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
 272 void   zcfree  OF((voidpf opaque, voidpf ptr));
 273
 274 #define ZALLOC(strm, items, size) \
 275            (*((strm)->zalloc))((strm)->opaque, (items), (size))
 276 #define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
 277 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
 278
 279 #endif /* ZUTIL_H */