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// Copyright (c) 1996-2009 Nokia Corporation and/or its subsidiary(-ies). |
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// All rights reserved. |
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// This component and the accompanying materials are made available |
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// under the terms of the License "Eclipse Public License v1.0" |
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// which accompanies this distribution, and is available |
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// at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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// |
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// Initial Contributors: |
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// Nokia Corporation - initial contribution. |
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// |
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// Contributors: |
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// |
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// Description: |
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// f32\sfat\inc\sl_bpb.h |
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// @file |
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// @internalTechnology |
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// |
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// |
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//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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//!! |
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//!! WARNING!! DO NOT edit this file !! '\sfat' component is obsolete and is not being used. '\sfat32'replaces it |
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//!! |
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//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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#ifndef SL_BPB_H |
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#define SL_BPB_H |
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#include "filesystem_fat.h" |
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using FileSystem_FAT::TFatSubType; |
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typedef TFatSubType TFatType; |
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const TInt KVolumeLabelSize =11; ///< Volume lable size |
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const TInt KFileSysTypeSize =8; ///< File system type parameter size |
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const TInt KVendorIdSize =8; ///< Vendor ID parameter size |
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const TInt KBootSectorSignature =0xAA55;///< File system Boot sector signiture |
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const TInt KSizeOfFatBootSector =62; ///< Size in bytes of Boot sector parameter block (BPB), 62 for fat16|12 |
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const TInt KFat16VolumeLabelPos =43; ///< Position of volume lable in BPB for Fat12/16 |
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const TUint32 KBootSectorNum =0; ///< Main Boot Sector number (always 0) |
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//------------------------------------------------------------------------------------------------------------------- |
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/** |
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Boot sector parameter block, enables access to all file system parameters. |
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Data is populated at mount time from the BPB sector |
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*/ |
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class TFatBootSector |
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{ |
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public: |
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//-- simple getters / setters |
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inline const TPtrC8 VendorId() const; |
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inline TInt BytesPerSector() const; |
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inline TInt SectorsPerCluster() const; |
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inline TInt ReservedSectors() const; |
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inline TInt NumberOfFats() const; |
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inline TInt RootDirEntries() const; |
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inline TInt TotalSectors() const; |
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inline TUint8 MediaDescriptor() const; |
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inline TInt FatSectors() const; |
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inline TInt SectorsPerTrack() const; |
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inline TInt NumberOfHeads() const; |
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inline TInt HiddenSectors() const; |
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inline TInt HugeSectors() const; |
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inline TInt PhysicalDriveNumber() const; |
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inline TInt ExtendedBootSignature() const; |
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inline TUint32 UniqueID() const; |
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inline const TPtrC8 VolumeLabel() const; |
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inline const TPtrC8 FileSysType() const; |
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inline TInt BootSectorSignature() const; |
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inline TUint32 RootClusterNum() const {return 0;} //-- dummy |
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inline TUint16 FSInfoSectorNum() const {return 0;} //-- dummy |
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inline TUint16 BkBootRecSector() const {return 0;} //-- dummy |
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inline void SetJumpInstruction(); |
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inline void SetVendorID(const TDesC8& aDes); |
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inline void SetBytesPerSector(TInt aBytesPerSector); |
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inline void SetSectorsPerCluster(TInt aSectorsPerCluster); |
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inline void SetReservedSectors(TInt aReservedSectors); |
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inline void SetNumberOfFats(TInt aNumberOfFats); |
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inline void SetRootDirEntries(TInt aRootDirEntries); |
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inline void SetTotalSectors(TInt aTotalSectors); |
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inline void SetMediaDescriptor(TUint8 aMediaDescriptor); |
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inline void SetFatSectors(TInt aFatSectors); |
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inline void SetSectorsPerTrack(TInt aSectorsPerTrack); |
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inline void SetNumberOfHeads(TInt aNumberOfHeads); |
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inline void SetHiddenSectors(TUint32 aHiddenSectors); |
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inline void SetHugeSectors(TUint32 aTotalSectors); |
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inline void SetPhysicalDriveNumber(TInt aPhysicalDriveNumber); |
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inline void SetReservedByte(TUint8 aReservedByte); |
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inline void SetExtendedBootSignature(TInt anExtendedBootSignature); |
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inline void SetUniqueID(TUint32 anUniqueID); |
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inline void SetVolumeLabel(const TDesC8& aDes); |
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inline void SetFileSysType(const TDesC8& aDes); |
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TFatBootSector(); |
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void Initialise(); |
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TBool IsValid() const; |
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TFatType FatType(void) const; |
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void Internalize(const TDesC8& aBuf); |
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void Externalize(TDes8& aBuf) const; |
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void PrintDebugInfo() const; |
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//-- more advanced API, works for all FAT types |
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TInt FirstFatSector() const; |
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TInt RootDirStartSector() const; |
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TInt FirstDataSector() const; |
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TUint32 VolumeTotalSectorNumber() const; |
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TUint32 TotalFatSectors() const; |
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TUint32 RootDirSectors() const; |
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protected: |
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TUint8 iJumpInstruction[3]; ///< +0 Jump instruction used for bootable volumes |
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TUint8 iVendorId[KVendorIdSize]; ///< +3 Vendor ID of the file system that formatted the volume |
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TUint16 iBytesPerSector; ///< +11/0x0b Bytes per sector |
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TUint8 iSectorsPerCluster; ///< +13/0x0d Sectors per cluster ratio |
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TUint16 iReservedSectors; ///< +14/0x0e Number of reserved sectors on the volume |
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TUint8 iNumberOfFats; ///< +16/0x10 Number of Fats on the volume |
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TUint16 iRootDirEntries; ///< +17/0x11 Number of entries allowed in the root directory, specific to Fat12/16, zero for FAT32 |
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TUint16 iTotalSectors; ///< +19/0x13 Total sectors on the volume, zero for FAT32 |
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TUint8 iMediaDescriptor; ///< +12/0x15 Media descriptor |
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TUint16 iFatSectors; ///< +22/0x16 Sectors used for the Fat table, zero for FAT32 |
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TUint16 iSectorsPerTrack; ///< +24/0x18 Sectors per track |
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TUint16 iNumberOfHeads; ///< +26/0x1a Number of heads |
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TUint32 iHiddenSectors; ///< +28/0x1c Number of hidden sectors in the volume |
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TUint32 iHugeSectors; ///< +32/0x20 Total sectors in the volume, Used if totalSectors > 65535 |
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//this is (boot sector) offset 36 for FAT12 and 16 but comes after additional FAT36 elements |
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TUint8 iPhysicalDriveNumber; ///< +36/0x24 Physical drive number, not used in Symbian OS |
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TUint8 iReserved; ///< +37/0x25 Reserved byte |
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TUint8 iExtendedBootSignature; ///< +38/0x26 Extended boot signiture |
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TUint32 iUniqueID; ///< +39/0x27 Unique volume ID |
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TUint8 iVolumeLabel[KVolumeLabelSize]; ///< +43/0x2b The volume's label |
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TUint8 iFileSysType[KFileSysTypeSize]; ///< +54/0x36 File system type |
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}; |
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#endif //SL_BPB_H |
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