zutil.h 7.0 KB
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/* zutil.h -- internal interface and configuration of the compression library
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 * Copyright (C) 1995-2006 Jean-loup Gailly.
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 * For conditions of distribution and use, see copyright notice in zlib.h
 */

/* WARNING: this file should *not* be used by applications. It is
   part of the implementation of the compression library and is
   subject to change. Applications should only use zlib.h.
 */

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/* @(#) $Id$ */
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#ifndef ZUTIL_H
#define ZUTIL_H
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#define ZLIB_INTERNAL
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#include "zlib.h"

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#ifdef STDC
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#  ifndef _WIN32_WCE
#    include <stddef.h>
#  endif
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#  include <string.h>
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#  include <stdlib.h>
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#endif
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#if defined(NO_ERRNO_H) || defined(_WIN32_WCE)
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#   ifdef _WIN32_WCE
      /* The Microsoft C Run-Time Library for Windows CE doesn't have
       * errno.  We define it as a global variable to simplify porting.
       * Its value is always 0 and should not be used.  We rename it to
       * avoid conflict with other libraries that use the same workaround.
       */
#     define errno z_errno
#   endif
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    extern int errno;
#else
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#   include <errno.h>
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#endif
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#ifndef local
#  define local static
#endif
/* compile with -Dlocal if your debugger can't find static symbols */

typedef unsigned char  uch;
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typedef uch FAR uchf;
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typedef unsigned short ush;
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typedef ush FAR ushf;
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typedef unsigned long  ulg;

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extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
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/* (size given to avoid silly warnings with Visual C++) */
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#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
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#define ERR_RETURN(strm,err) \
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  return (strm->msg = (char*)ERR_MSG(err), (err))
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/* To be used only when the state is known to be valid */

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        /* common constants */
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#ifndef DEF_WBITS
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#  define DEF_WBITS MAX_WBITS
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#endif
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/* default windowBits for decompression. MAX_WBITS is for compression only */

#if MAX_MEM_LEVEL >= 8
#  define DEF_MEM_LEVEL 8
#else
#  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
#endif
/* default memLevel */
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#define STORED_BLOCK 0
#define STATIC_TREES 1
#define DYN_TREES    2
/* The three kinds of block type */

#define MIN_MATCH  3
#define MAX_MATCH  258
/* The minimum and maximum match lengths */

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#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */

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        /* target dependencies */
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#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
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#  define OS_CODE  0x00
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#  if defined(__TURBOC__) || defined(__BORLANDC__)
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#    if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
       /* Allow compilation with ANSI keywords only enabled */
       void _Cdecl farfree( void *block );
       void *_Cdecl farmalloc( unsigned long nbytes );
#    else
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#      include <alloc.h>
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#    endif
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#  else /* MSC or DJGPP */
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#    include <malloc.h>
#  endif
#endif

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#ifdef AMIGA
#  define OS_CODE  0x01
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#endif

#if defined(VAXC) || defined(VMS)
#  define OS_CODE  0x02
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#  define F_OPEN(name, mode) \
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     fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
#endif

#if defined(ATARI) || defined(atarist)
#  define OS_CODE  0x05
#endif

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#ifdef OS2
#  define OS_CODE  0x06
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#  ifdef M_I86
     #include <malloc.h>
#  endif
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#endif

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#if defined(MACOS) || defined(TARGET_OS_MAC)
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#  define OS_CODE  0x07
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#  if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
#    include <unix.h> /* for fdopen */
#  else
#    ifndef fdopen
#      define fdopen(fd,mode) NULL /* No fdopen() */
#    endif
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#  endif
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#endif

#ifdef TOPS20
#  define OS_CODE  0x0a
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#endif

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#ifdef WIN32
#  ifndef __CYGWIN__  /* Cygwin is Unix, not Win32 */
#    define OS_CODE  0x0b
#  endif
#endif

#ifdef __50SERIES /* Prime/PRIMOS */
#  define OS_CODE  0x0f
#endif

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#if defined(_BEOS_) || defined(RISCOS)
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#  define fdopen(fd,mode) NULL /* No fdopen() */
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#endif

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#if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
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#  if defined(_WIN32_WCE)
#    define fdopen(fd,mode) NULL /* No fdopen() */
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#    ifndef _PTRDIFF_T_DEFINED
       typedef int ptrdiff_t;
#      define _PTRDIFF_T_DEFINED
#    endif
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#  else
#    define fdopen(fd,type)  _fdopen(fd,type)
#  endif
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#endif

#if defined(__BORLANDC__)
#pragma warn -8004
#pragma warn -8008
#pragma warn -8066
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#endif

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        /* common defaults */
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#ifndef OS_CODE
#  define OS_CODE  0x03  /* assume Unix */
#endif

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#ifndef F_OPEN
#  define F_OPEN(name, mode) fopen((name), (mode))
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#endif

#ifdef _LARGEFILE64_SOURCE
#  define F_OPEN64(name, mode) fopen64((name), (mode))
#else
#  define F_OPEN64(name, mode) fopen((name), (mode))
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#endif

         /* functions */

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#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
#  ifndef HAVE_VSNPRINTF
#    define HAVE_VSNPRINTF
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#  endif
#endif
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#if defined(__CYGWIN__)
#  ifndef HAVE_VSNPRINTF
#    define HAVE_VSNPRINTF
#  endif
#endif
#ifndef HAVE_VSNPRINTF
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#  ifdef MSDOS
     /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
        but for now we just assume it doesn't. */
#    define NO_vsnprintf
#  endif
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#  ifdef __TURBOC__
#    define NO_vsnprintf
#  endif
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#  ifdef WIN32
     /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
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#    if !defined(vsnprintf) && !defined(NO_vsnprintf)
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#      define vsnprintf _vsnprintf
#    endif
#  endif
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#  ifdef __SASC
#    define NO_vsnprintf
#  endif
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#endif
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#ifdef VMS
#  define NO_vsnprintf
#endif
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#if defined(pyr)
#  define NO_MEMCPY
#endif
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#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
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 /* Use our own functions for small and medium model with MSC <= 5.0.
  * You may have to use the same strategy for Borland C (untested).
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  * The __SC__ check is for Symantec.
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  */
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#  define NO_MEMCPY
#endif
#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
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#  define HAVE_MEMCPY
#endif
#ifdef HAVE_MEMCPY
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#  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
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#    define zmemcpy _fmemcpy
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#    define zmemcmp _fmemcmp
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#    define zmemzero(dest, len) _fmemset(dest, 0, len)
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#  else
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#    define zmemcpy memcpy
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#    define zmemcmp memcmp
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#    define zmemzero(dest, len) memset(dest, 0, len)
#  endif
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#else
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   extern void zmemcpy  OF((Bytef* dest, const Bytef* source, uInt len));
   extern int  zmemcmp  OF((const Bytef* s1, const Bytef* s2, uInt len));
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   extern void zmemzero OF((Bytef* dest, uInt len));
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#endif

/* Diagnostic functions */
#ifdef DEBUG
#  include <stdio.h>
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   extern int z_verbose;
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   extern void z_error    OF((char *m));
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#  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
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#  define Trace(x) {if (z_verbose>=0) fprintf x ;}
#  define Tracev(x) {if (z_verbose>0) fprintf x ;}
#  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
#  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
#  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
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#else
#  define Assert(cond,msg)
#  define Trace(x)
#  define Tracev(x)
#  define Tracevv(x)
#  define Tracec(c,x)
#  define Tracecv(c,x)
#endif


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voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
void   zcfree  OF((voidpf opaque, voidpf ptr));
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#define ZALLOC(strm, items, size) \
           (*((strm)->zalloc))((strm)->opaque, (items), (size))
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#define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
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#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}

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#endif /* ZUTIL_H */