/* zutil.h -- internal interface and configuration of the compression library
 * Copyright (C) 1995-2010 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

#if ((__GNUC__-0) * 10 + __GNUC_MINOR__-0 >= 33) && !defined(NO_VIZ)
#define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
#else
#define ZLIB_INTERNAL
#endif

#include "zlib.h"

#ifdef STDC
#if !(defined(_WIN32_WCE) && defined(_MSC_VER))
#include <stddef.h>
#endif
#include <string.h>
#include <stdlib.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)) && !defined __INTERIX
#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

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

/* provide prototypes for these when building zlib without LFS */
#if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0
ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
#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)
#if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 )
#define vsnprintf _vsnprintf
#endif
#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
void ZLIB_INTERNAL zmemcpy OF((Bytef * dest, const Bytef * source, uInt len));
int ZLIB_INTERNAL zmemcmp OF((const Bytef * s1, const Bytef * s2, uInt len));
void ZLIB_INTERNAL zmemzero OF((Bytef * dest, uInt len));
#endif

/* Diagnostic functions */
#ifdef DEBUG
#include <stdio.h>
extern int ZLIB_INTERNAL z_verbose;
extern void ZLIB_INTERNAL 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 ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items, unsigned size));
void ZLIB_INTERNAL 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 */
