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