/*

* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

#ifndef __FAT_IMAGE_GENERATER_HEADER__

#define __FAT_IMAGE_GENERATER_HEADER__

#include "fatdefines.h"

#include <iostream>

#include <list>

#include <fstream>

using namespace std ;

const unsigned int KBufferedIOBytes = 0x800000 ; // 8M 

const unsigned int KMaxClusterBytes = 0x8000; // 32K

enum TSupportedFatType {

	EFatUnknown = 0,

	EFat16 = 1,

	EFat32 = 2

};

class TFSNode;

class TFatCluster;

typedef list<TFatCluster*> PFatClusterList ;

typedef list<TFatCluster*>::iterator Interator ;

class TFatImgGenerator

{

public :

	//The constructor ,

	//a TFatImgGenerator is created and initialized,

	//if the parameters breaks the FAT specification,

	// then iType is set to EFatUnknown and thus

	// IsValid return false

	TFatImgGenerator(TSupportedFatType aType , ConfigurableFatAttributes& aAttr  );

	~TFatImgGenerator();

	inline bool IsValid() const { return (EFatUnknown != iType);}

	//Create the FAT image, 

	//If FAT image is not valid, or error accurs, return false

	bool Execute(TFSNode* aRootDir , const char* aOutputFile);

protected :

	void InitAsFat16(TUint32 aTotalSectors,TUint8 aSecPerClus,TUint16 aBytsPerSec);

	void InitAsFat32(TUint32 aTotalSectors,TUint8 aSecPerClus,TUint16 aBytsPerSec);

	bool PrepareClusters(TUint& aNextClusIndex,TFSNode* aNode);

	TSupportedFatType iType ;

	char* iFatTable ; 

	TUint iFatTableBytes ;  

	TUint iTotalClusters ;	

	TUint iBytsPerClus ;

	TFATBootSector iBootSector ;

	TFAT32BSExt iFat32Ext ;

	TFATHeader iFatHeader ;	

	PFatClusterList iDataClusters ;

};

#endif