1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/kernelhwsrv/userlibandfileserver/fileserver/sfat/inc/fat_table.h	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,140 @@
     1.4 +// Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.5 +// All rights reserved.
     1.6 +// This component and the accompanying materials are made available
     1.7 +// under the terms of the License "Eclipse Public License v1.0"
     1.8 +// which accompanies this distribution, and is available
     1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.10 +//
    1.11 +// Initial Contributors:
    1.12 +// Nokia Corporation - initial contribution.
    1.13 +//
    1.14 +// Contributors:
    1.15 +//
    1.16 +// Description:
    1.17 +// f32\sfat\inc\fat_table.h
    1.18 +// FAT12/16 File Allocation Table classes definitions
    1.19 +// 
    1.20 +//
    1.21 +
    1.22 +/**
    1.23 + @file
    1.24 + @internalTechnology
    1.25 +*/
    1.26 +
    1.27 +//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    1.28 +//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    1.29 +//!!
    1.30 +//!! WARNING!! DO NOT edit this file !! '\sfat' component is obsolete and is not being used. '\sfat32'replaces it
    1.31 +//!!
    1.32 +//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    1.33 +//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    1.34 +
    1.35 +
    1.36 +
    1.37 +#ifndef FAT_TABLE_H
    1.38 +#define FAT_TABLE_H
    1.39 +
    1.40 +
    1.41 +//---------------------------------------------------------------------------------------------------------------------------------------
    1.42 +
    1.43 +/**
    1.44 +    Fat table used for all media except RAM, manages the Fat table for all cluster requests.
    1.45 +*/
    1.46 +class CAtaFatTable : public CFatTable
    1.47 +    {
    1.48 +public:
    1.49 +    static CAtaFatTable* NewL(CFatMountCB& aOwner);
    1.50 +
    1.51 +    //-- overrides from the base class
    1.52 +    void FlushL();
    1.53 +    void Dismount(TBool aDiscardDirtyData);
    1.54 +    void ReMountL();
    1.55 +    void InvalidateCacheL(TInt64 aPos, TUint32 aLength);
    1.56 +    void InvalidateCacheL();
    1.57 +    
    1.58 +    TUint32 ReadL(TUint32 aFatIndex) const;
    1.59 +    void WriteL(TUint32 aFatIndex, TUint32 aValue);
    1.60 +
    1.61 +    TInt64 DataPositionInBytes(TUint32 aCluster) const;
    1.62 +
    1.63 +private:
    1.64 +    CAtaFatTable(CFatMountCB& aOwner);
    1.65 +    void InitializeL();
    1.66 +    void CreateCacheL();
    1.67 +
    1.68 +private:
    1.69 +    CFatCacheBase* iCache;  ///< FAT cache, fixed or LRU depending on the FAT type
    1.70 +    };
    1.71 +
    1.72 +//---------------------------------------------------------------------------------------------------------------------------------------
    1.73 +
    1.74 +/**
    1.75 +    Fat table used for RAM media, manages the Fat table for all cluster requests. 
    1.76 +    RAM media only supports Fat12/16.
    1.77 +*/
    1.78 +class CRamFatTable : public CFatTable
    1.79 +    {
    1.80 +public:
    1.81 +    static CRamFatTable* NewL(CFatMountCB& aOwner);
    1.82 +
    1.83 +    void ReMountL();
    1.84 +    TUint32 ReadL(TUint32 aFatIndex) const;
    1.85 +    void WriteL(TUint32 aFatIndex, TUint32 aValue);
    1.86 +    TInt64 DataPositionInBytes(TUint32 aCluster) const;
    1.87 +    void FreeClusterListL(TUint32 aCluster);
    1.88 +    TUint32 AllocateSingleClusterL(TUint32 aNearestCluster);
    1.89 +    void ExtendClusterListL(TUint32 aNumber,TInt& aCluster);
    1.90 +
    1.91 +private:
    1.92 +    CRamFatTable(CFatMountCB& aOwner);
    1.93 +
    1.94 +    void InitializeL();
    1.95 +
    1.96 +    inline TUint8 *RamDiskBase() const;
    1.97 +    inline TInt AllocateClusterNumber();
    1.98 +    inline void WriteFatTable(TInt aFatIndex,TInt aValue);
    1.99 +    inline void WriteFatTable(TInt aFatIndex,TInt aFatValue,TInt anIndirectionTableValue);
   1.100 +    inline void ReadIndirectionTable(TUint32& aCluster) const;
   1.101 +    inline void WriteIndirectionTable(TInt aFatIndex,TInt aValue);
   1.102 +    inline TUint8* MemCopy(TAny* aTrg,const TAny* aSrc,TInt aLength);
   1.103 +    inline TUint8* MemCopyFillZ(TAny* aTrg, TAny* aSrc, TInt aLength);
   1.104 +    inline void ZeroFillCluster(TInt aCluster); 
   1.105 +    
   1.106 +    void UpdateIndirectionTable(TUint32 aStartCluster,TUint32 anEndCluster,TInt aNum);
   1.107 +
   1.108 +protected:
   1.109 +
   1.110 +    TInt iFatTablePos;          ///< Current position in the fat table
   1.111 +    TInt iIndirectionTablePos;  ///< Current position in indirection table, second fat used for this
   1.112 +    TUint8* iRamDiskBase;       ///< Pointer to the Ram disk base
   1.113 +    };
   1.114 +
   1.115 +
   1.116 +
   1.117 +//---------------------------------------------------------------------------------------------------------------------------------
   1.118 +
   1.119 +
   1.120 +#endif //FAT_TABLE_H
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