text: /* zutil.h -- internal interface and configuration of the compression library
   * Copyright (C) 1995-2005 Jean-loup Gailly.
   * 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.
   */
  
  /* @(#) $Id$ */
  
  #ifndef ZUTIL_H
  #define ZUTIL_H
  
  #define ZLIB_INTERNAL
  #include "zlib.h"
  
  #ifdef STDC
  	#ifndef _WIN32_WCE
  		#include <stddef.h>
  	#endif
  	#include <string.h>
  	#include <stdlib.h>
  #endif
  #ifdef NO_ERRNO_H
  	#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
  	extern int errno;
  #else
  	#ifndef _WIN32_WCE
  		#include <errno.h>
  	#endif
  #endif
  
  #ifndef local
  	#define local static
  #endif
  /* compile with -Dlocal if your debugger can't find static symbols */
  
  typedef unsigned char  uch;
  typedef uch FAR uchf;
  typedef unsigned short ush;
  typedef ush FAR ushf;
  typedef unsigned long  ulg;
  
  extern const char* const z_errmsg[10];  /* indexed by 2-zlib_error */
  /* (size given to avoid silly warnings with Visual C++) */
  
  #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
  
  #define ERR_RETURN(strm,err) \
    return (strm->msg = (char*)ERR_MSG(err), (err))
  /* To be used only when the state is known to be valid */
  
  /* common constants */
  
  #ifndef DEF_WBITS
  	#define DEF_WBITS MAX_WBITS
  #endif
  /* 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 */
  
  #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 */
  
  #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
  
  /* target dependencies */
  
  #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
  	#define OS_CODE  0x00
  	#if defined(__TURBOC__) || defined(__BORLANDC__)
  		#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
  			#include <alloc.h>
  		#endif
  	#else /* MSC or DJGPP */
  		#include <malloc.h>
  	#endif
  #endif
  
  #ifdef AMIGA
  	#define OS_CODE  0x01
  #endif
  
  #if defined(VAXC) || defined(VMS)
  #  define OS_CODE  0x02
  #  define F_OPEN(name, mode) \
       fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
  #endif
  
  #if defined(ATARI) || defined(atarist)
  	#define OS_CODE  0x05
  #endif
  
  #ifdef OS2
  	#define OS_CODE  0x06
  	#ifdef M_I86
  		#include <malloc.h>
  	#endif
  #endif
  
  #if defined(MACOS) || defined(TARGET_OS_MAC)
  	#define OS_CODE  0x07
  	#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
  	#endif
  #endif
  
  #ifdef TOPS20
  	#define OS_CODE  0x0a
  #endif
  
  #ifdef WIN32
  	#ifndef __CYGWIN__  /* Cygwin is Unix, not Win32 */
  		#define OS_CODE  0x0b
  	#endif
  #endif
  
  #ifdef __50SERIES /* Prime/PRIMOS */
  	#define OS_CODE  0x0f
  #endif
  
  #if defined(_BEOS_) || defined(RISCOS)
  	#define fdopen(fd,mode) NULL /* No fdopen() */
  #endif
  
  #if (defined(_MSC_VER) && (_MSC_VER > 600))
  	#if defined(_WIN32_WCE)
  		#define fdopen(fd,mode) NULL /* No fdopen() */
  		#ifndef _PTRDIFF_T_DEFINED
  			typedef int ptrdiff_t;
  			#define _PTRDIFF_T_DEFINED
  		#endif
  	#else
  		#define fdopen(fd,type)  _fdopen(fd,type)
  	#endif
  #endif
  
  /* common defaults */
  
  #ifndef OS_CODE
  	#define OS_CODE  0x03  /* assume Unix */
  #endif
  
  #ifndef F_OPEN
  	#define F_OPEN(name, mode) fopen((name), (mode))
  #endif
  
  /* functions */
  
  #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
  	#ifndef HAVE_VSNPRINTF
  		#define HAVE_VSNPRINTF
  	#endif
  #endif
  #if defined(__CYGWIN__)
  	#ifndef HAVE_VSNPRINTF
  		#define HAVE_VSNPRINTF
  	#endif
  #endif
  #ifndef HAVE_VSNPRINTF
  	#ifdef MSDOS
  		/* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
  		but for now we just assume it doesn't. */
  		#define NO_vsnprintf
  	#endif
  	#ifdef __TURBOC__
  		#define NO_vsnprintf
  	#endif
  	#ifdef WIN32
  		/* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
  		#if !defined(vsnprintf) && !defined(NO_vsnprintf)
  			#define vsnprintf _vsnprintf
  		#endif
  	#endif
  	#ifdef __SASC
  		#define NO_vsnprintf
  	#endif
  #endif
  #ifdef VMS
  	#define NO_vsnprintf
  #endif
  
  #if defined(pyr)
  	#define NO_MEMCPY
  #endif
  #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
  	/* 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).
  	* The __SC__ check is for Symantec.
  	*/
  	#define NO_MEMCPY
  #endif
  #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
  	#define HAVE_MEMCPY
  #endif
  #ifdef HAVE_MEMCPY
  	#ifdef SMALL_MEDIUM /* MSDOS small or medium model */
  		#define zmemcpy _fmemcpy
  		#define zmemcmp _fmemcmp
  		#define zmemzero(dest, len) _fmemset(dest, 0, len)
  	#else
  		#define zmemcpy memcpy
  		#define zmemcmp memcmp
  		#define zmemzero(dest, len) memset(dest, 0, len)
  	#endif
  #else
  	extern void zmemcpy  OF((Bytef* dest, const Bytef* source, uInt len));
  	extern int  zmemcmp  OF((const Bytef* s1, const Bytef* s2, uInt len));
  	extern void zmemzero OF((Bytef* dest, uInt len));
  #endif
  
  /* Diagnostic functions */
  #ifdef DEBUG
  	#include <stdio.h>
  	extern int z_verbose;
  	extern void z_error    OF((char* m));
  	#define Assert(cond,msg) {if(!(cond)) z_error(msg);}
  	#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 ;}
  #else
  	#define Assert(cond,msg)
  	#define Trace(x)
  	#define Tracev(x)
  	#define Tracevv(x)
  	#define Tracec(c,x)
  	#define Tracecv(c,x)
  #endif
  
  
  voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
  void   zcfree  OF((voidpf opaque, voidpf ptr));
  
  #define ZALLOC(strm, items, size) \
             (*((strm)->zalloc))((strm)->opaque, (items), (size))
  #define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
  #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
  
  #endif /* ZUTIL_H */
  