src/zlib/zutil.h

   1 /* zutil.h -- internal interface and configuration of the compression library
   2  * Copyright (C) 1995-2005 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 #ifdef NO_ERRNO_H
  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 #  ifndef _WIN32_WCE
  38 #    include <errno.h>
  39 #  endif
  40 #endif
  41
  42 #ifndef local
  43 #  define local static
  44 #endif
  45 /* compile with -Dlocal if your debugger can't find static symbols */
  46
  47 typedef unsigned char  uch;
  48 typedef uch FAR uchf;
  49 typedef unsigned short ush;
  50 typedef ush FAR ushf;
  51 typedef unsigned long  ulg;
  52
  53 extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
  54 /* (size given to avoid silly warnings with Visual C++) */
  55
  56 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
  57
  58 #define ERR_RETURN(strm,err) \
  59   return (strm->msg = (char*)ERR_MSG(err), (err))
  60 /* To be used only when the state is known to be valid */
  61
  62         /* common constants */
  63
  64 #ifndef DEF_WBITS
  65 #  define DEF_WBITS MAX_WBITS
  66 #endif
  67 /* default windowBits for decompression. MAX_WBITS is for compression only */
  68
  69 #if MAX_MEM_LEVEL >= 8
  70 #  define DEF_MEM_LEVEL 8
  71 #else
  72 #  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
  73 #endif
  74 /* default memLevel */
  75
  76 #define STORED_BLOCK 0
  77 #define STATIC_TREES 1
  78 #define DYN_TREES    2
  79 /* The three kinds of block type */
  80
  81 #define MIN_MATCH  3
  82 #define MAX_MATCH  258
  83 /* The minimum and maximum match lengths */
  84
  85 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
  86
  87         /* target dependencies */
  88
  89 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
  90 #  define OS_CODE  0x00
  91 #  if defined(__TURBOC__) || defined(__BORLANDC__)
  92 #    if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
  93        /* Allow compilation with ANSI keywords only enabled */
  94        void _Cdecl farfree( void *block );
  95        void *_Cdecl farmalloc( unsigned long nbytes );
  96 #    else
  97 #      include <alloc.h>
  98 #    endif
  99 #  else /* MSC or DJGPP */
 100 #    include <malloc.h>
 101 #  endif
 102 #endif
 103
 104 #ifdef AMIGA
 105 #  define OS_CODE  0x01
 106 #endif
 107
 108 #if defined(VAXC) || defined(VMS)
 109 #  define OS_CODE  0x02
 110 #  define F_OPEN(name, mode) \
 111      fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
 112 #endif
 113
 114 #if defined(ATARI) || defined(atarist)
 115 #  define OS_CODE  0x05
 116 #endif
 117
 118 #ifdef OS2
 119 #  define OS_CODE  0x06
 120 #  ifdef M_I86
 121      #include <malloc.h>
 122 #  endif
 123 #endif
 124
 125 #if defined(MACOS) || defined(TARGET_OS_MAC)
 126 #  define OS_CODE  0x07
 127 #  if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
 128 #    include <unix.h> /* for fdopen */
 129 #  else
 130 #    ifndef fdopen
 131 #      define fdopen(fd,mode) NULL /* No fdopen() */
 132 #    endif
 133 #  endif
 134 #endif
 135
 136 #ifdef TOPS20
 137 #  define OS_CODE  0x0a
 138 #endif
 139
 140 #ifdef WIN32
 141 #  ifndef __CYGWIN__  /* Cygwin is Unix, not Win32 */
 142 #    define OS_CODE  0x0b
 143 #  endif
 144 #endif
 145
 146 #ifdef __50SERIES /* Prime/PRIMOS */
 147 #  define OS_CODE  0x0f
 148 #endif
 149
 150 #if defined(_BEOS_) || defined(RISCOS)
 151 #  define fdopen(fd,mode) NULL /* No fdopen() */
 152 #endif
 153
 154 #if (defined(_MSC_VER) && (_MSC_VER > 600))
 155 #  if defined(_WIN32_WCE)
 156 #    define fdopen(fd,mode) NULL /* No fdopen() */
 157 #    ifndef _PTRDIFF_T_DEFINED
 158        typedef int ptrdiff_t;
 159 #      define _PTRDIFF_T_DEFINED
 160 #    endif
 161 #  else
 162 #    define fdopen(fd,type)  _fdopen(fd,type)
 163 #  endif
 164 #endif
 165
 166         /* common defaults */
 167
 168 #ifndef OS_CODE
 169 #  define OS_CODE  0x03  /* assume Unix */
 170 #endif
 171
 172 #ifndef F_OPEN
 173 #  define F_OPEN(name, mode) fopen((name), (mode))
 174 #endif
 175
 176          /* functions */
 177
 178 #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
 179 #  ifndef HAVE_VSNPRINTF
 180 #    define HAVE_VSNPRINTF
 181 #  endif
 182 #endif
 183 #if defined(__CYGWIN__)
 184 #  ifndef HAVE_VSNPRINTF
 185 #    define HAVE_VSNPRINTF
 186 #  endif
 187 #endif
 188 #ifndef HAVE_VSNPRINTF
 189 #  ifdef MSDOS
 190      /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
 191         but for now we just assume it doesn't. */
 192 #    define NO_vsnprintf
 193 #  endif
 194 #  ifdef __TURBOC__
 195 #    define NO_vsnprintf
 196 #  endif
 197 #  ifdef WIN32
 198      /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
 199 #    if !defined(vsnprintf) && !defined(NO_vsnprintf)
 200 #      define vsnprintf _vsnprintf
 201 #    endif
 202 #  endif
 203 #  ifdef __SASC
 204 #    define NO_vsnprintf
 205 #  endif
 206 #endif
 207 #ifdef VMS
 208 #  define NO_vsnprintf
 209 #endif
 210
 211 #if defined(pyr)
 212 #  define NO_MEMCPY
 213 #endif
 214 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
 215  /* Use our own functions for small and medium model with MSC <= 5.0.
 216   * You may have to use the same strategy for Borland C (untested).
 217   * The __SC__ check is for Symantec.
 218   */
 219 #  define NO_MEMCPY
 220 #endif
 221 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
 222 #  define HAVE_MEMCPY
 223 #endif
 224 #ifdef HAVE_MEMCPY
 225 #  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
 226 #    define zmemcpy _fmemcpy
 227 #    define zmemcmp _fmemcmp
 228 #    define zmemzero(dest, len) _fmemset(dest, 0, len)
 229 #  else
 230 #    define zmemcpy memcpy
 231 #    define zmemcmp memcmp
 232 #    define zmemzero(dest, len) memset(dest, 0, len)
 233 #  endif
 234 #else
 235    extern void zmemcpy  OF((Bytef* dest, const Bytef* source, uInt len));
 236    extern int  zmemcmp  OF((const Bytef* s1, const Bytef* s2, uInt len));
 237    extern void zmemzero OF((Bytef* dest, uInt len));
 238 #endif
 239
 240 /* Diagnostic functions */
 241 #ifdef DEBUG
 242 #  include <stdio.h>
 243    extern int z_verbose;
 244    extern void z_error    OF((char *m));
 245 #  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
 246 #  define Trace(x) {if (z_verbose>=0) fprintf x ;}
 247 #  define Tracev(x) {if (z_verbose>0) fprintf x ;}
 248 #  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
 249 #  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
 250 #  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
 251 #else
 252 #  define Assert(cond,msg)
 253 #  define Trace(x)
 254 #  define Tracev(x)
 255 #  define Tracevv(x)
 256 #  define Tracec(c,x)
 257 #  define Tracecv(c,x)
 258 #endif
 259
 260
 261 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
 262 void   zcfree  OF((voidpf opaque, voidpf ptr));
 263
 264 #define ZALLOC(strm, items, size) \
 265            (*((strm)->zalloc))((strm)->opaque, (items), (size))
 266 #define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
 267 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
 268
 269 #endif /* ZUTIL_H */