zlib/zutil.h

   1 /* zutil.h -- internal interface and configuration of the compression library
   2  * Copyright (C) 1995-2012 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 #ifdef HAVE_HIDDEN
  17 #  define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
  18 #else
  19 #  define ZLIB_INTERNAL
  20 #endif
  21
  22 #include "zlib.h"
  23
  24 #if defined(STDC) && !defined(Z_SOLO)
  25 #  if !(defined(_WIN32_WCE) && defined(_MSC_VER))
  26 #    include <stddef.h>
  27 #  endif
  28 #  include <string.h>
  29 #  include <stdlib.h>
  30 #endif
  31
  32 #ifdef Z_SOLO
  33    typedef long ptrdiff_t;  /* guess -- will be caught if guess is wrong */
  34 #endif
  35
  36 #ifndef local
  37 #  define local static
  38 #endif
  39 /* compile with -Dlocal if your debugger can't find static symbols */
  40
  41 typedef unsigned char  uch;
  42 typedef uch FAR uchf;
  43 typedef unsigned short ush;
  44 typedef ush FAR ushf;
  45 typedef unsigned long  ulg;
  46
  47 extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
  48 /* (size given to avoid silly warnings with Visual C++) */
  49
  50 #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
  51
  52 #define ERR_RETURN(strm,err) \
  53   return (strm->msg = (char*)ERR_MSG(err), (err))
  54 /* To be used only when the state is known to be valid */
  55
  56         /* common constants */
  57
  58 #ifndef DEF_WBITS
  59 #  define DEF_WBITS MAX_WBITS
  60 #endif
  61 /* default windowBits for decompression. MAX_WBITS is for compression only */
  62
  63 #if MAX_MEM_LEVEL >= 8
  64 #  define DEF_MEM_LEVEL 8
  65 #else
  66 #  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
  67 #endif
  68 /* default memLevel */
  69
  70 #define STORED_BLOCK 0
  71 #define STATIC_TREES 1
  72 #define DYN_TREES    2
  73 /* The three kinds of block type */
  74
  75 #define MIN_MATCH  3
  76 #define MAX_MATCH  258
  77 /* The minimum and maximum match lengths */
  78
  79 #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
  80
  81         /* target dependencies */
  82
  83 #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
  84 #  define OS_CODE  0x00
  85 #  ifndef Z_SOLO
  86 #    if defined(__TURBOC__) || defined(__BORLANDC__)
  87 #      if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
  88          /* Allow compilation with ANSI keywords only enabled */
  89          void _Cdecl farfree( void *block );
  90          void *_Cdecl farmalloc( unsigned long nbytes );
  91 #      else
  92 #        include <alloc.h>
  93 #      endif
  94 #    else /* MSC or DJGPP */
  95 #      include <malloc.h>
  96 #    endif
  97 #  endif
  98 #endif
  99
 100 #ifdef AMIGA
 101 #  define OS_CODE  0x01
 102 #endif
 103
 104 #if defined(VAXC) || defined(VMS)
 105 #  define OS_CODE  0x02
 106 #  define F_OPEN(name, mode) \
 107      fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
 108 #endif
 109
 110 #if defined(ATARI) || defined(atarist)
 111 #  define OS_CODE  0x05
 112 #endif
 113
 114 #ifdef OS2
 115 #  define OS_CODE  0x06
 116 #  if defined(M_I86) && !defined(Z_SOLO)
 117 #    include <malloc.h>
 118 #  endif
 119 #endif
 120
 121 #if defined(MACOS) || defined(TARGET_OS_MAC)
 122 #  define OS_CODE  0x07
 123 #  ifndef Z_SOLO
 124 #    if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
 125 #      include <unix.h> /* for fdopen */
 126 #    else
 127 #      ifndef fdopen
 128 #        define fdopen(fd,mode) NULL /* No fdopen() */
 129 #      endif
 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__) && !defined(MSDOS)
 165   #pragma warn -8004
 166   #pragma warn -8008
 167   #pragma warn -8066
 168 #endif
 169
 170 /* provide prototypes for these when building zlib without LFS */
 171 #if !defined(_WIN32) && (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
 172     ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
 173     ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
 174 #endif
 175
 176         /* common defaults */
 177
 178 #ifndef OS_CODE
 179 #  define OS_CODE  0x03  /* assume Unix */
 180 #endif
 181
 182 #ifndef F_OPEN
 183 #  define F_OPEN(name, mode) fopen((name), (mode))
 184 #endif
 185
 186          /* functions */
 187
 188 #if defined(pyr) || defined(Z_SOLO)
 189 #  define NO_MEMCPY
 190 #endif
 191 #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
 192  /* Use our own functions for small and medium model with MSC <= 5.0.
 193   * You may have to use the same strategy for Borland C (untested).
 194   * The __SC__ check is for Symantec.
 195   */
 196 #  define NO_MEMCPY
 197 #endif
 198 #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
 199 #  define HAVE_MEMCPY
 200 #endif
 201 #ifdef HAVE_MEMCPY
 202 #  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
 203 #    define zmemcpy _fmemcpy
 204 #    define zmemcmp _fmemcmp
 205 #    define zmemzero(dest, len) _fmemset(dest, 0, len)
 206 #  else
 207 #    define zmemcpy memcpy
 208 #    define zmemcmp memcmp
 209 #    define zmemzero(dest, len) memset(dest, 0, len)
 210 #  endif
 211 #else
 212    void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
 213    int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
 214    void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len));
 215 #endif
 216
 217 /* Diagnostic functions */
 218 #ifdef DEBUG
 219 #  include <stdio.h>
 220    extern int ZLIB_INTERNAL z_verbose;
 221    extern void ZLIB_INTERNAL z_error OF((char *m));
 222 #  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
 223 #  define Trace(x) {if (z_verbose>=0) fprintf x ;}
 224 #  define Tracev(x) {if (z_verbose>0) fprintf x ;}
 225 #  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
 226 #  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
 227 #  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
 228 #else
 229 #  define Assert(cond,msg)
 230 #  define Trace(x)
 231 #  define Tracev(x)
 232 #  define Tracevv(x)
 233 #  define Tracec(c,x)
 234 #  define Tracecv(c,x)
 235 #endif
 236
 237 #ifndef Z_SOLO
 238    voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items,
 239                                     unsigned size));
 240    void ZLIB_INTERNAL zcfree  OF((voidpf opaque, voidpf ptr));
 241 #endif
 242
 243 #define ZALLOC(strm, items, size) \
 244            (*((strm)->zalloc))((strm)->opaque, (items), (size))
 245 #define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
 246 #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
 247
 248 /* Reverse the bytes in a 32-bit value */
 249 #define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
 250                     (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
 251
 252 #endif /* ZUTIL_H */