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// Copyright (c) 1998-2009 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_scandrv.h |
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// |
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// |
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/** |
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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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//!! 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 '\sfat' component is obsolete and is not being used.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_SCANDRV_H |
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#define SL_SCANDRV_H |
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const TInt KMaxMatchingEntries = 2; ///< Maximum number of matching directory entries scan drive can fix. Any more indicates a fault in the file system |
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const TInt KMaxArrayDepth = 6; ///< Maximum array depth for cluster storage when KMaxScanDepth is reached |
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//--------------------------------------------------------------------------------------------------------------------------------- |
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/** |
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Data structure used to store the location of a partial VFat entry |
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*/ |
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struct TPartVFatEntry |
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{ |
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TEntryPos iEntryPos; ///< The position of the partial VFat entry |
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TFatDirEntry iEntry; ///< The Dos entry The VFat entries belong with |
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}; |
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//--------------------------------------------------------------------------------------------------------------------------------- |
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/** |
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Data structure used to store the locations of entries with matching |
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start cluster numbers. |
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*/ |
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struct TMatchingStartCluster |
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{ |
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TEntryPos iEntries[KMaxMatchingEntries]; ///< The positions of the matching entries |
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TInt iCount; ///< Count of matching entries |
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TInt iStartCluster; ///< The matching cluster number found in more than one entry |
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}; |
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class CCheckFatTable : public CBase |
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{ |
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public: |
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static CCheckFatTable* NewL(CFatMountCB* aOwner); |
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CCheckFatTable(CFatMountCB* aOwner); |
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~CCheckFatTable(); |
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void InitializeL(); |
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TBool FlushL(); |
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TBool GetNextClusterL(TInt& aCluster) const; |
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void WriteFatEntryEofFL(TInt aCluster); |
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TInt ReadL(TInt aFatIndex) const; |
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void WriteL(TInt aFatIndex,TInt aValue); |
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private: |
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void WriteMediaDescriptor(); |
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TInt PosInBytes(TInt aFatIndex) const; |
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TInt PosInIndex(TInt aBytePos) const; |
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inline TBool IsEof16Bit(TInt aCluster) const; |
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inline TBool IsEof12Bit(TInt aCluster) const; |
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inline TInt MaxFatIndex() const; |
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TInt iMaxFatIndex; |
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TUint8* iCheckFat; |
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CFatMountCB* iOwner; |
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}; |
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/** |
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Scan drive class performs scan drive functionality on all types |
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of fat volume. |
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class CScanDrive : public CBase |
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{ |
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public: |
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enum TDirError{EScanMatchingEntry=1,EScanPartEntry}; |
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CScanDrive(); |
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~CScanDrive(); |
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static CScanDrive* NewL(CFatMountCB* aMount); |
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void ConstructL(CFatMountCB* aMount); |
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TInt StartL(); |
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TBool ProblemsDiscovered() const; |
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#if defined(DEBUG_SCANDRIVE) |
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void PrintErrors(); |
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void CompareFatsL() const; |
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#endif |
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void FixupDirErrorL(); |
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void FindSameStartClusterL(); |
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TInt FindStartClusterL(TInt aDirCluster); |
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void CheckDirStructureL(); |
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void CheckDirL(TInt aCluster); |
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void ProcessEntryL(const TFatDirEntry& aEntry); |
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TInt CheckEntryClusterL(const TFatDirEntry& aEntry, const TEntryPos& aEntryPos); |
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void WriteClusterChainL(TInt aCluster,TInt aSizeInBytes); |
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TBool MoveToVFatEndL(TEntryPos& aPos,TFatDirEntry& aEntry,TInt& aDirLength); |
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TBool IsValidVFatEntry(const TFatDirEntry& aEntry,TInt prevNum)const; |
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TBool IsDosEntry(const TFatDirEntry& aEntry)const; |
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void AddPartialVFatL(const TEntryPos& aStartPos, const TFatDirEntry& aEntry); |
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TBool AddMatchingEntryL(const TEntryPos& aEntryPos); |
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TInt GetReservedidL(const TEntryPos aVFatPos); |
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void WriteNewFatsL(); |
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void FixPartEntryL(); |
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void FixMatchingEntryL(); |
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void MovePastEntriesL(TEntryPos& aEntryPos,TFatDirEntry& aEntry,TInt aToMove,TInt& aDirEntries); |
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void AddToClusterListL(TInt aCluster); |
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inline TBool AlreadyExistsL(TInt aCluster)const; |
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inline TBool IsEndOfRootDir(const TEntryPos& aPos)const; |
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inline TBool IsEofF(TInt aVal)const; |
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inline TBool IsDirError()const; |
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void IndicateErrorsFound(); |
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CFatMountCB* iMount; |
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CCheckFatTable* iNewFat; |
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TPartVFatEntry iPartEntry; |
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TMatchingStartCluster iMatching; |
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TDirError iDirError; |
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TInt iDirsChecked; |
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TInt iRecursiveDepth; |
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RArray<TInt>* iClusterListArray[KMaxArrayDepth]; |
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TInt iListArrayIndex; |
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TBool iFoundProblems; ///< if ETrue after finish, it means that there where some problems FS structure and they were probably fixed; |
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}; |
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#endif //SL_SCANDRV_H |
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