/* zutil.h -- internal interface and configuration of the compression library

  * Copyright (C) 1995-1998 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 _Z_UTIL_H

 #define _Z_UTIL_H

 #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 *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 */

 #ifdef MSDOS

 #  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 OS2

 #  define OS_CODE  0x06

 #endif

 #ifdef WIN32 /* Window 95 & Windows NT */

 #  define OS_CODE  0x0b

 #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

 #ifdef AMIGA

 #  define OS_CODE  0x01

 #endif

 #if defined(ATARI) || defined(atarist)

 #  define OS_CODE  0x05

 #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 __50SERIES /* Prime/PRIMOS */

 #  define OS_CODE  0x0F

 #endif

 #ifdef TOPS20

 #  define OS_CODE  0x0a

 #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 */

 #ifdef HAVE_STRERROR

    extern char *strerror OF((int));

 #  define zstrerror(errnum) strerror(errnum)

 #else

 #  define zstrerror(errnum) ""

 #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

 typedef uLong (ZEXPORT *check_func) OF((uLong check, const Bytef *buf,

 				       uInt len));

 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 /* _Z_UTIL_H */