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: zutil.h d9ee6d6b507afa7d588b44d82597e411855e0bfd 2015-10-08 04:18:30Z Kurt Schwehr $ */
  
  #ifndef ZUTIL_H
  #define ZUTIL_H
  
  #define ZLIB_INTERNAL
  #include "zlib.h"
  
  #ifdef STDC
  #  include <stddef.h>
  #  include <string.h>
  #  include <stdlib.h>
  #endif
  #ifdef NO_ERRNO_H
      extern int errno;
  #else
  #  include <errno.h>
  #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))
  #  define fdopen(fd,type)  _fdopen(fd,type)
  #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) && (_MSC_VER < 1500)
  #      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 */
  