/*

* Copyright (c) 2006-2009 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: 

* FAT base boot sector class for FileSystem component

* @internalComponent

* @released

*

*/

#ifndef FATBPBSECTOR_H

#define FATBPBSECTOR_H

#include "errorhandler.h"

#include <string>

#include <time.h>

using namespace std;

/**

Class representing common fields of Boot Sector of all three fat system volume type.

@internalComponent

@released

*/

class TFATBaseBootSector

{

protected:

	//jump instruction to boot code

	unsigned char iJmpBoot[3];

	unsigned char iOEMName[8] ;

	unsigned short iBytesPerSector;

	unsigned int  iHiddenSectors;

	unsigned char iMedia; //Media Type

	unsigned char iNumberOfFats;

	unsigned short  iNumHeads; //number of heads for interrupt 0x13

	unsigned short  iSectorsPerTrack; //sector per track for interrupt ox13

	unsigned short iTotalSectors; //16 bit total count of sectors on the volume

	unsigned int iTotalSectors32; //32 bit total count of sectors on the volume

	unsigned char iPhysicalDriveNumber;

	unsigned char iReservedByte;

	unsigned char iBootSign; //extended boot signature

	unsigned int  iVolumeId;

	unsigned char iVolumeLabel[KMaxVolumeLabel];

	unsigned short iRootDirEntries;

	unsigned short iReservedSectors;

	unsigned char  iSectorsPerCluster;

	unsigned int  iFatSectors; //count of sectors occupied by FAT in FAT16 volume

	unsigned int  iFatSectors32; //count of sectors occupied by FAT in FAT32 volume

	unsigned char iFileSysType[KFileSysTypeLength];

public:	

	TFATBaseBootSector();

	virtual ~TFATBaseBootSector();

	//Get methods

	unsigned char* JumpInstruction() ;

	unsigned char* OEMName() ;

	unsigned int BytesPerSector() const;

	unsigned int FatSectors32() const;

	unsigned short FatSectors() const;

	unsigned char NumberOfFats() const;

	unsigned short ReservedSectors() const;

	unsigned short RootDirEntries() const;

	unsigned char  SectorsPerCluster() const;

	unsigned int TotalSectors(Long64 aPartitionSize) const;

	unsigned short LowSectorsCount() const;

	unsigned int HighSectorsCount() const;

	unsigned char Media() const;

	unsigned short SectorsPerTrack() const;

	unsigned short NumberOfHeads() const;

	unsigned int HiddenSectors() const;

	unsigned char BootSectorDriveNumber() const;

	unsigned char ReservedByte() const;

	unsigned char BootSignature() const;

	unsigned char* VolumeLab() ;

	unsigned int VolumeId() const;

	//utility functions

	int Log2(int aNum);

	//Set methods

	void SetJumpInstruction();

	void SetOEMName();

	void SetBytesPerSector(unsigned int aDriveSectorSize);

	void SetNumberOfFats(unsigned int aDriveNoOfFATs);

	void ComputeTotalSectors(Long64 aPartitionSize);

	void SetMedia();

	void SetSectorsPerTrack();

	void SetNumberOfHeads();

	void SetHiddenSectors();

	void SetBootSectorDriveNumber();

	void SetReservedByte();

	void SetBootSignature();

	void SetVolumeId();

	void SetVolumeLab(string aVolumeLable);

	//virtual methods

	virtual void SetRootDirEntries()=0;

	virtual void SetFileSysType()=0;

	virtual void SetReservedSectors()=0;

	virtual void ComputeSectorsPerCluster(Long64 aPartitionSize)=0;

	virtual void ComputeFatSectors(Long64 aPartitionSize)=0;	

};

#endif //FATBPBSECTOR_H