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: zutil.h,v 1.1 2009/02/05 23:03:31 stechong Exp $ */

    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 */