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