--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/userlibandfileserver/fileserver/sfat/inc/sl_bpb.h Mon Oct 19 15:55:17 2009 +0100
@@ -0,0 +1,148 @@
+// Copyright (c) 1996-2009 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:
+// f32\sfat\inc\sl_bpb.h
+// @file
+// @internalTechnology
+//
+//
+
+
+#ifndef SL_BPB_H
+#define SL_BPB_H
+
+
+#include "filesystem_fat.h"
+using FileSystem_FAT::TFatSubType;
+typedef TFatSubType TFatType;
+
+
+const TInt KVolumeLabelSize =11; ///< Volume lable size
+const TInt KFileSysTypeSize =8; ///< File system type parameter size
+const TInt KVendorIdSize =8; ///< Vendor ID parameter size
+const TInt KBootSectorSignature =0xAA55;///< File system Boot sector signiture
+
+const TInt KSizeOfFatBootSector =62; ///< Size in bytes of Boot sector parameter block (BPB), 62 for fat16|12
+const TInt KFat16VolumeLabelPos =43; ///< Position of volume lable in BPB for Fat12/16
+
+const TUint32 KBootSectorNum =0; ///< Main Boot Sector number (always 0)
+
+//-------------------------------------------------------------------------------------------------------------------
+
+/**
+Boot sector parameter block, enables access to all file system parameters.
+Data is populated at mount time from the BPB sector
+*/
+class TFatBootSector
+ {
+public:
+ //-- simple getters / setters
+ inline const TPtrC8 VendorId() const;
+ inline TInt BytesPerSector() const;
+ inline TInt SectorsPerCluster() const;
+ inline TInt ReservedSectors() const;
+ inline TInt NumberOfFats() const;
+ inline TInt RootDirEntries() const;
+ inline TInt TotalSectors() const;
+ inline TUint8 MediaDescriptor() const;
+ inline TInt FatSectors() const;
+ inline TInt SectorsPerTrack() const;
+ inline TInt NumberOfHeads() const;
+ inline TInt HiddenSectors() const;
+ inline TInt HugeSectors() const;
+ inline TInt PhysicalDriveNumber() const;
+ inline TInt ExtendedBootSignature() const;
+ inline TUint32 UniqueID() const;
+ inline const TPtrC8 VolumeLabel() const;
+ inline const TPtrC8 FileSysType() const;
+ inline TInt BootSectorSignature() const;
+
+ inline TUint32 RootClusterNum() const {return 0;} //-- dummy
+ inline TUint16 FSInfoSectorNum() const {return 0;} //-- dummy
+ inline TUint16 BkBootRecSector() const {return 0;} //-- dummy
+
+
+ inline void SetJumpInstruction();
+ inline void SetVendorID(const TDesC8& aDes);
+ inline void SetBytesPerSector(TInt aBytesPerSector);
+ inline void SetSectorsPerCluster(TInt aSectorsPerCluster);
+ inline void SetReservedSectors(TInt aReservedSectors);
+ inline void SetNumberOfFats(TInt aNumberOfFats);
+ inline void SetRootDirEntries(TInt aRootDirEntries);
+ inline void SetTotalSectors(TInt aTotalSectors);
+ inline void SetMediaDescriptor(TUint8 aMediaDescriptor);
+ inline void SetFatSectors(TInt aFatSectors);
+ inline void SetSectorsPerTrack(TInt aSectorsPerTrack);
+ inline void SetNumberOfHeads(TInt aNumberOfHeads);
+ inline void SetHiddenSectors(TUint32 aHiddenSectors);
+ inline void SetHugeSectors(TUint32 aTotalSectors);
+ inline void SetPhysicalDriveNumber(TInt aPhysicalDriveNumber);
+ inline void SetReservedByte(TUint8 aReservedByte);
+ inline void SetExtendedBootSignature(TInt anExtendedBootSignature);
+ inline void SetUniqueID(TUint32 anUniqueID);
+ inline void SetVolumeLabel(const TDesC8& aDes);
+ inline void SetFileSysType(const TDesC8& aDes);
+
+public:
+
+ TFatBootSector();
+
+ void Initialise();
+ TBool IsValid() const;
+ TFatType FatType(void) const;
+
+ void Internalize(const TDesC8& aBuf);
+ void Externalize(TDes8& aBuf) const;
+ void PrintDebugInfo() const;
+
+ //-- more advanced API, works for all FAT types
+ TInt FirstFatSector() const;
+ TInt RootDirStartSector() const;
+ TInt FirstDataSector() const;
+
+ TUint32 VolumeTotalSectorNumber() const;
+ TUint32 TotalFatSectors() const;
+ TUint32 RootDirSectors() const;
+
+
+protected:
+
+ TUint8 iJumpInstruction[3]; ///< +0 Jump instruction used for bootable volumes
+ TUint8 iVendorId[KVendorIdSize]; ///< +3 Vendor ID of the file system that formatted the volume
+ TUint16 iBytesPerSector; ///< +11/0x0b Bytes per sector
+ TUint8 iSectorsPerCluster; ///< +13/0x0d Sectors per cluster ratio
+ TUint16 iReservedSectors; ///< +14/0x0e Number of reserved sectors on the volume
+ TUint8 iNumberOfFats; ///< +16/0x10 Number of Fats on the volume
+ TUint16 iRootDirEntries; ///< +17/0x11 Number of entries allowed in the root directory, specific to Fat12/16, zero for FAT32
+ TUint16 iTotalSectors; ///< +19/0x13 Total sectors on the volume, zero for FAT32
+ TUint8 iMediaDescriptor; ///< +12/0x15 Media descriptor
+ TUint16 iFatSectors; ///< +22/0x16 Sectors used for the Fat table, zero for FAT32
+ TUint16 iSectorsPerTrack; ///< +24/0x18 Sectors per track
+ TUint16 iNumberOfHeads; ///< +26/0x1a Number of heads
+ TUint32 iHiddenSectors; ///< +28/0x1c Number of hidden sectors in the volume
+ TUint32 iHugeSectors; ///< +32/0x20 Total sectors in the volume, Used if totalSectors > 65535
+ //this is (boot sector) offset 36 for FAT12 and 16 but comes after additional FAT36 elements
+ TUint8 iPhysicalDriveNumber; ///< +36/0x24 Physical drive number, not used in Symbian OS
+ TUint8 iReserved; ///< +37/0x25 Reserved byte
+ TUint8 iExtendedBootSignature; ///< +38/0x26 Extended boot signiture
+ TUint32 iUniqueID; ///< +39/0x27 Unique volume ID
+ TUint8 iVolumeLabel[KVolumeLabelSize]; ///< +43/0x2b The volume's label
+ TUint8 iFileSysType[KFileSysTypeSize]; ///< +54/0x36 File system type
+ };
+
+
+
+
+
+#endif //SL_BPB_H
+