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

* Copyright (C) 1995-2003 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,v 1.1 2003/12/07 05:29:20 icculus Exp $ */

#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

#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 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

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 */