/* ioapi.h -- IO base function header for compress/uncompress .zip
   files using zlib + zip or unzip API

   Version 1.01e, February 12th, 2005

   Copyright (C) 1998-2005 Gilles Vollant
*/

#ifndef _ZLIBIOAPI_H
#define _ZLIBIOAPI_H

#include "..\..\..\include\Lib_Clara.h"

#define ZLIB_FILEFUNC_SEEK_CUR (1)
#define ZLIB_FILEFUNC_SEEK_END (2)
#define ZLIB_FILEFUNC_SEEK_SET (0)

#define ZLIB_FILEFUNC_MODE_READ	  (1)
#define ZLIB_FILEFUNC_MODE_WRITE	 (2)
#define ZLIB_FILEFUNC_MODE_READWRITEFILTER (3)

#define ZLIB_FILEFUNC_MODE_EXISTING (4)
#define ZLIB_FILEFUNC_MODE_CREATE   (8)


#define IOAPI_READ_BUF_SIZE	512

typedef struct {
	int handle;
	unsigned int err;
	char readbuf[IOAPI_READ_BUF_SIZE];
	uLong bufpos;
	uLong buflen;
} FILE;


#ifndef ZCALLBACK

#if (defined(WIN32) || defined (WINDOWS) || defined (_WINDOWS)) && defined(CALLBACK) && defined (USEWINDOWS_CALLBACK)
#define ZCALLBACK CALLBACK
#else
#define ZCALLBACK
#endif
#endif

#ifdef __cplusplus
extern "C" {
#endif

typedef voidpf (ZCALLBACK *open_file_func) (voidpf opaque,  const wchar_t* name, int mode);
typedef uLong  (ZCALLBACK *read_file_func) (voidpf opaque, voidpf stream, void* buf, uLong size);
typedef uLong  (ZCALLBACK *write_file_func) (voidpf opaque, voidpf stream, const void* buf, uLong size);
typedef long   (ZCALLBACK *tell_file_func) (voidpf opaque, voidpf stream);
typedef long   (ZCALLBACK *seek_file_func) (voidpf opaque, voidpf stream, uLong offset, int origin);
typedef int	(ZCALLBACK *close_file_func) (voidpf opaque, voidpf stream);
typedef int	(ZCALLBACK *testerror_file_func) (voidpf opaque, voidpf stream);

typedef struct zlib_filefunc_def_s
{
	open_file_func	  zopen_file;
	read_file_func	  zread_file;
	write_file_func	 zwrite_file;
	tell_file_func	  ztell_file;
	seek_file_func	  zseek_file;
	close_file_func	 zclose_file;
	testerror_file_func zerror_file;
	voidpf			  opaque;
} zlib_filefunc_def;



void fill_fopen_filefunc (zlib_filefunc_def* pzlib_filefunc_def);

#define ZREAD(filefunc,filestream,buf,size) ((*((filefunc).zread_file))((filefunc).opaque,filestream,buf,size))
#define ZWRITE(filefunc,filestream,buf,size) ((*((filefunc).zwrite_file))((filefunc).opaque,filestream,buf,size))
#define ZTELL(filefunc,filestream) ((*((filefunc).ztell_file))((filefunc).opaque,filestream))
#define ZSEEK(filefunc,filestream,pos,mode) ((*((filefunc).zseek_file))((filefunc).opaque,filestream,pos,mode))
#define ZCLOSE(filefunc,filestream) ((*((filefunc).zclose_file))((filefunc).opaque,filestream))
#define ZERROR(filefunc,filestream) ((*((filefunc).zerror_file))((filefunc).opaque,filestream))


#ifdef __cplusplus
}
#endif

#endif