1 /*

     2 * Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

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

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 * FAT base boot sector class for FileSystem component

    16 * @internalComponent

    17 * @released

    18 *

    19 */

    20 

    21 

    22 #ifndef FATBPBSECTOR_H

    23 #define FATBPBSECTOR_H

    24 

    25 #include "errorhandler.h"

    26 #include <string>

    27 #include <time.h>

    28 

    29 using namespace std;

    30 

    31 /**

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

    33 

    34 @internalComponent

    35 @released

    36 */

    37 class TFATBaseBootSector

    38 

    39 {

    40 protected:

    41 	//jump instruction to boot code

    42 	unsigned char iJmpBoot[3];

    43 	unsigned char iOEMName[8] ;

    44 	unsigned short iBytesPerSector;

    45 	unsigned int  iHiddenSectors;

    46 	unsigned char iMedia; //Media Type

    47 	unsigned char iNumberOfFats;

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

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

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

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

    52 	unsigned char iPhysicalDriveNumber;

    53 	unsigned char iReservedByte;

    54 	unsigned char iBootSign; //extended boot signature

    55 	unsigned int  iVolumeId;

    56 	unsigned char iVolumeLabel[KMaxVolumeLabel];

    57 	unsigned short iRootDirEntries;

    58 	unsigned short iReservedSectors;

    59 	unsigned char  iSectorsPerCluster;

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

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

    62 	unsigned char iFileSysType[KFileSysTypeLength];

    63 public:	

    64 	TFATBaseBootSector();

    65 	virtual ~TFATBaseBootSector();

    66 	//Get methods

    67 	unsigned char* JumpInstruction() ;

    68 	unsigned char* OEMName() ;

    69 	unsigned int BytesPerSector() const;

    70 	unsigned int FatSectors32() const;

    71 	unsigned short FatSectors() const;

    72 	unsigned char NumberOfFats() const;

    73 	unsigned short ReservedSectors() const;

    74 	unsigned short RootDirEntries() const;

    75 	unsigned char  SectorsPerCluster() const;

    76 	unsigned int TotalSectors(Long64 aPartitionSize) const;

    77 	unsigned short LowSectorsCount() const;

    78 	unsigned int HighSectorsCount() const;

    79 	unsigned char Media() const;

    80 	unsigned short SectorsPerTrack() const;

    81 	unsigned short NumberOfHeads() const;

    82 	unsigned int HiddenSectors() const;

    83 	unsigned char BootSectorDriveNumber() const;

    84 	unsigned char ReservedByte() const;

    85 	unsigned char BootSignature() const;

    86 	unsigned char* VolumeLab() ;

    87 	unsigned int VolumeId() const;

    88 	//utility functions

    89 	int Log2(int aNum);

    90 	//Set methods

    91 	void SetJumpInstruction();

    92 	void SetOEMName();

    93 	void SetBytesPerSector(unsigned int aDriveSectorSize);

    94 	void SetNumberOfFats(unsigned int aDriveNoOfFATs);

    95 	void ComputeTotalSectors(Long64 aPartitionSize);

    96 	void SetMedia();

    97 	void SetSectorsPerTrack();

    98 	void SetNumberOfHeads();

    99 	void SetHiddenSectors();

   100 	void SetBootSectorDriveNumber();

   101 	void SetReservedByte();

   102 	void SetBootSignature();

   103 	void SetVolumeId();

   104 	void SetVolumeLab(String aVolumeLable);

   105 	//virtual methods

   106 	virtual void SetRootDirEntries()=0;

   107 	virtual void SetFileSysType()=0;

   108 	virtual void SetReservedSectors()=0;

   109 	virtual void ComputeSectorsPerCluster(Long64 aPartitionSize)=0;

   110 	virtual void ComputeFatSectors(Long64 aPartitionSize)=0;	

   111 };

   112 

   113 #endif //FATBPBSECTOR_H