--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/userlibandfileserver/fileserver/sfat/inc/fat_table.h	Mon Oct 19 15:55:17 2009 +0100
@@ -0,0 +1,130 @@
+// Copyright (c) 1998-2009 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\fat_table.h
+// FAT12/16 File Allocation Table classes definitions
+// 
+//
+
+/**
+ @file
+ @internalTechnology
+*/
+
+#ifndef FAT_TABLE_H
+#define FAT_TABLE_H
+
+
+//---------------------------------------------------------------------------------------------------------------------------------------
+
+/**
+    Fat table used for all media except RAM, manages the Fat table for all cluster requests.
+*/
+class CAtaFatTable : public CFatTable
+	{
+public:
+    static CAtaFatTable* NewL(CFatMountCB& aOwner);
+
+    //-- overrides from the base class
+	void FlushL();
+	void Dismount(TBool aDiscardDirtyData);
+    void ReMountL();
+	void InvalidateCacheL(TInt64 aPos, TUint32 aLength);
+	void InvalidateCacheL();
+	
+	TUint32 ReadL(TUint32 aFatIndex) const;
+	void WriteL(TUint32 aFatIndex, TUint32 aValue);
+
+	TInt64 DataPositionInBytes(TUint32 aCluster) const;
+
+private:
+	CAtaFatTable(CFatMountCB& aOwner);
+    void InitializeL();
+    void CreateCacheL();
+
+private:
+    CFatCacheBase* iCache;  ///< FAT cache, fixed or LRU depending on the FAT type
+	};
+
+//---------------------------------------------------------------------------------------------------------------------------------------
+
+/**
+    Fat table used for RAM media, manages the Fat table for all cluster requests. 
+    RAM media only supports Fat12/16.
+*/
+class CRamFatTable : public CFatTable
+	{
+public:
+    static CRamFatTable* NewL(CFatMountCB& aOwner);
+
+    void ReMountL();
+	TUint32 ReadL(TUint32 aFatIndex) const;
+	void WriteL(TUint32 aFatIndex, TUint32 aValue);
+	TInt64 DataPositionInBytes(TUint32 aCluster) const;
+	void FreeClusterListL(TUint32 aCluster);
+	TUint32 AllocateSingleClusterL(TUint32 aNearestCluster);
+	void ExtendClusterListL(TUint32 aNumber,TInt& aCluster);
+
+private:
+	CRamFatTable(CFatMountCB& aOwner);
+
+	void InitializeL();
+
+	inline TUint8 *RamDiskBase() const;
+	inline TInt AllocateClusterNumber();
+	inline void WriteFatTable(TInt aFatIndex,TInt aValue);
+	inline void WriteFatTable(TInt aFatIndex,TInt aFatValue,TInt anIndirectionTableValue);
+	inline void ReadIndirectionTable(TUint32& aCluster) const;
+	inline void WriteIndirectionTable(TInt aFatIndex,TInt aValue);
+	inline TUint8* MemCopy(TAny* aTrg,const TAny* aSrc,TInt aLength);
+	inline TUint8* MemCopyFillZ(TAny* aTrg, TAny* aSrc, TInt aLength);
+	inline void ZeroFillCluster(TInt aCluster); 
+	
+	void UpdateIndirectionTable(TUint32 aStartCluster,TUint32 anEndCluster,TInt aNum);
+
+protected:
+
+	TInt iFatTablePos;          ///< Current position in the fat table
+	TInt iIndirectionTablePos;  ///< Current position in indirection table, second fat used for this
+	TUint8* iRamDiskBase;       ///< Pointer to the Ram disk base
+	};
+
+
+
+//---------------------------------------------------------------------------------------------------------------------------------
+
+
+#endif //FAT_TABLE_H
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