com32/lib/zlib/zutil.h

   1 /* zutil.h -- internal interface and configuration of the compression library
   2  * Copyright (C) 1995-2003 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
  12 #ifndef ZUTIL_H
  13 #define ZUTIL_H
  14
  15 #define ZLIB_INTERNAL
  16 #include "zlib.h"
  17
  18 #ifdef STDC
  19 #  include <stddef.h>
  20 #  include <string.h>
  21 #  include <stdlib.h>
  22 #endif
  23 #ifdef NO_ERRNO_H
  24     extern int errno;
  25 #else
  26 #   include <errno.h>
  27 #endif
  28
  29 #ifndef local
  30 #  define local static
  31 #endif
  32 /* compile with -Dlocal if your debugger can't find static symbols */
  33
  34 typedef unsigned char  uch;
  35 typedef uch FAR uchf;
  36 typedef unsigned short ush;
  37 typedef ush FAR ushf;
  38 typedef unsigned long  ulg;
  39
  40 extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
  41 /* (size given to avoid silly warnings with Visual C++) */
  42
  43 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
  44
  45 #define ERR_RETURN(strm,err) \
  46   return (strm->msg = (char*)ERR_MSG(err), (err))
  47 /* To be used only when the state is known to be valid */
  48
  49         /* common constants */
  50
  51 #ifndef DEF_WBITS
  52 #  define DEF_WBITS MAX_WBITS
  53 #endif
  54 /* default windowBits for decompression. MAX_WBITS is for compression only */
  55
  56 #if MAX_MEM_LEVEL >= 8
  57 #  define DEF_MEM_LEVEL 8
  58 #else
  59 #  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
  60 #endif
  61 /* default memLevel */
  62
  63 #define STORED_BLOCK 0
  64 #define STATIC_TREES 1
  65 #define DYN_TREES    2
  66 /* The three kinds of block type */
  67
  68 #define MIN_MATCH  3
  69 #define MAX_MATCH  258
  70 /* The minimum and maximum match lengths */
  71
  72 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
  73
  74         /* target dependencies */
  75
  76 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
  77 #  define OS_CODE  0x00
  78 #  if defined(__TURBOC__) || defined(__BORLANDC__)
  79 #    if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
  80        /* Allow compilation with ANSI keywords only enabled */
  81        void _Cdecl farfree( void *block );
  82        void *_Cdecl farmalloc( unsigned long nbytes );
  83 #    else
  84 #      include <alloc.h>
  85 #    endif
  86 #  else /* MSC or DJGPP */
  87 #    include <malloc.h>
  88 #  endif
  89 #endif
  90
  91 #ifdef AMIGA
  92 #  define OS_CODE  0x01
  93 #endif
  94
  95 #if defined(VAXC) || defined(VMS)
  96 #  define OS_CODE  0x02
  97 #  define F_OPEN(name, mode) \
  98      fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
  99 #endif
 100
 101 #if defined(ATARI) || defined(atarist)
 102 #  define OS_CODE  0x05
 103 #endif
 104
 105 #ifdef OS2
 106 #  define OS_CODE  0x06
 107 #endif
 108
 109 #if defined(MACOS) || defined(TARGET_OS_MAC)
 110 #  define OS_CODE  0x07
 111 #  if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
 112 #    include <unix.h> /* for fdopen */
 113 #  else
 114 #    ifndef fdopen
 115 #      define fdopen(fd,mode) NULL /* No fdopen() */
 116 #    endif
 117 #  endif
 118 #endif
 119
 120 #ifdef TOPS20
 121 #  define OS_CODE  0x0a
 122 #endif
 123
 124 #ifdef WIN32
 125 #  ifndef __CYGWIN__  /* Cygwin is Unix, not Win32 */
 126 #    define OS_CODE  0x0b
 127 #  endif
 128 #endif
 129
 130 #ifdef __50SERIES /* Prime/PRIMOS */
 131 #  define OS_CODE  0x0f
 132 #endif
 133
 134 #if defined(_BEOS_) || defined(RISCOS)
 135 #  define fdopen(fd,mode) NULL /* No fdopen() */
 136 #endif
 137
 138 #if (defined(_MSC_VER) && (_MSC_VER > 600))
 139 #  if defined(_WIN32_WCE)
 140 #    define fdopen(fd,mode) NULL /* No fdopen() */
 141 #    ifndef _PTRDIFF_T_DEFINED
 142        typedef int ptrdiff_t;
 143 #      define _PTRDIFF_T_DEFINED
 144 #    endif
 145 #  else
 146 #    define fdopen(fd,type)  _fdopen(fd,type)
 147 #  endif
 148 #endif
 149
 150         /* common defaults */
 151
 152 #ifndef OS_CODE
 153 #  define OS_CODE  0x03  /* assume Unix */
 154 #endif
 155
 156 #ifndef F_OPEN
 157 #  define F_OPEN(name, mode) fopen((name), (mode))
 158 #endif
 159
 160          /* functions */
 161
 162 #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
 163 #  ifndef HAVE_VSNPRINTF
 164 #    define HAVE_VSNPRINTF
 165 #  endif
 166 #endif
 167 #if defined(__CYGWIN__)
 168 #  ifndef HAVE_VSNPRINTF
 169 #    define HAVE_VSNPRINTF
 170 #  endif
 171 #endif
 172 #ifndef HAVE_VSNPRINTF
 173 #  ifdef MSDOS
 174      /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
 175         but for now we just assume it doesn't. */
 176 #    define NO_vsnprintf
 177 #  endif
 178 #  ifdef __TURBOC__
 179 #    define NO_vsnprintf
 180 #  endif
 181 #  ifdef WIN32
 182      /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
 183 #    if !defined(vsnprintf) && !defined(NO_vsnprintf)
 184 #      define vsnprintf _vsnprintf
 185 #    endif
 186 #  endif
 187 #  ifdef __SASC
 188 #    define NO_vsnprintf
 189 #  endif
 190 #endif
 191
 192 #ifdef HAVE_STRERROR
 193    extern char *strerror OF((int));
 194 #  define zstrerror(errnum) strerror(errnum)
 195 #else
 196 #  define zstrerror(errnum) ""
 197 #endif
 198
 199 #if defined(pyr)
 200 #  define NO_MEMCPY
 201 #endif
 202 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
 203  /* Use our own functions for small and medium model with MSC <= 5.0.
 204   * You may have to use the same strategy for Borland C (untested).
 205   * The __SC__ check is for Symantec.
 206   */
 207 #  define NO_MEMCPY
 208 #endif
 209 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
 210 #  define HAVE_MEMCPY
 211 #endif
 212 #ifdef HAVE_MEMCPY
 213 #  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
 214 #    define zmemcpy _fmemcpy
 215 #    define zmemcmp _fmemcmp
 216 #    define zmemzero(dest, len) _fmemset(dest, 0, len)
 217 #  else
 218 #    define zmemcpy memcpy
 219 #    define zmemcmp memcmp
 220 #    define zmemzero(dest, len) memset(dest, 0, len)
 221 #  endif
 222 #else
 223    extern void zmemcpy  OF((Bytef* dest, const Bytef* source, uInt len));
 224    extern int  zmemcmp  OF((const Bytef* s1, const Bytef* s2, uInt len));
 225    extern void zmemzero OF((Bytef* dest, uInt len));
 226 #endif
 227
 228 /* Diagnostic functions */
 229 #ifdef DEBUG
 230 #  include <stdio.h>
 231    extern int z_verbose;
 232    extern void z_error    OF((char *m));
 233 #  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
 234 #  define Trace(x) {if (z_verbose>=0) fprintf x ;}
 235 #  define Tracev(x) {if (z_verbose>0) fprintf x ;}
 236 #  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
 237 #  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
 238 #  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
 239 #else
 240 #  define Assert(cond,msg)
 241 #  define Trace(x)
 242 #  define Tracev(x)
 243 #  define Tracevv(x)
 244 #  define Tracec(c,x)
 245 #  define Tracecv(c,x)
 246 #endif
 247
 248
 249 voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
 250 void   zcfree  OF((voidpf opaque, voidpf ptr));
 251
 252 #define ZALLOC(strm, items, size) \
 253            (*((strm)->zalloc))((strm)->opaque, (items), (size))
 254 #define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
 255 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
 256
 257 #endif /* ZUTIL_H */