// 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 "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:

//

#include "UF_STD.H"

const TInt KBaseOffset=KFileStoreStartOffset-KPermanentStoreHeaderOffset;

#if defined(__NO_CLASS_CONSTS__)

#define KBase TStreamPos(KBaseOffset)

#else

const TStreamPos KBase=TStreamPos(KBaseOffset);

#endif

EXPORT_C TUid CPermanentFileStore::Layout() const

/** Gets the UID that uniquely identifies this file store as a permanent file store.

@return KPermanentFileStoreLayoutUid. */

	{

	return KPermanentFileStoreLayoutUid;

	}

EXPORT_C CPermanentFileStore::CPermanentFileStore(RFile& aFile)

//

// Constructor creating a new file store.

//

	: CFileStore(aFile)/*,iCoord(NULL)*/

	{}

EXPORT_C CPermanentFileStore::CPermanentFileStore(RFileBuf& aBuf,const TUidType& aType)

//

// Constructor opening an existing file store.

//

	: CFileStore(aBuf,aType)/*,iCoord(NULL)*/

	{}

EXPORT_C void CPermanentFileStore::MarshalL()

	{

	__ASSERT_DEBUG(iCoord==NULL,User::Invariant());

	iCoord=new(ELeave) CPermanentStoreCoord(KBase,Host());

	CFileStore::MarshalL();

	iRoot=Coord().PrimaryL();

	}

EXPORT_C CPermanentFileStore::~CPermanentFileStore()

/** Frees resources owned by the object, prior to its destruction. */

	{

	Destruct();

	delete iCoord;

	}

EXPORT_C MStreamBuf* CPermanentFileStore::DoReadL(TStreamId anId) const

	{

	if (iCoord==NULL)

		__LEAVE(KErrNotFound);

//

	return HPermanentStoreBuf::OpenL(CoordL(),anId,HPermanentStoreBuf::ERead);

	}

EXPORT_C MStreamBuf* CPermanentFileStore::DoCreateL(TStreamId& anId)

	{

	return HPermanentStoreBuf::CreateL(TrimL(),anId);

	}

EXPORT_C MStreamBuf* CPermanentFileStore::DoWriteL(TStreamId anId)

	{

	if (iCoord==NULL)

		__LEAVE(KErrNotFound);

//

	return HPermanentStoreBuf::OpenL(CoordL(),anId);

	}

EXPORT_C MStreamBuf* CPermanentFileStore::DoReplaceL(TStreamId anId)

	{

	if (iCoord==NULL)

		__LEAVE(KErrNotFound);

//

	return HPermanentStoreBuf::ReplaceL(TrimL(),anId);

	}

EXPORT_C void CPermanentFileStore::ExternalizeL(RWriteStream& aStream) const

//

// Externalize this store's structure, during construction only.

//

	{

	__ASSERT_DEBUG(!Host().IsActive()&&iCoord==NULL,User::Invariant());

	TUint8 buf[-KPermanentStoreHeaderOffset];

	Mem::FillZ(buf,sizeof(buf));

	aStream.WriteL(buf,sizeof(buf));

	}

EXPORT_C void CPermanentFileStore::InternalizeL(RReadStream& aStream)

//

// Internalize this store's structure, during marshalling or refreshment.

//

	{

	__ASSERT_DEBUG(!Host().IsActive(),User::Invariant());

	Coord().InternalizeL(aStream);

	}

EXPORT_C void CPermanentFileStore::DoSetRootL(TStreamId anId)

//

// Set the root stream id.

//

	{

	CoordL().ChangedL();

	iRoot=anId;

	}

EXPORT_C TStreamId CPermanentFileStore::DoExtendL()

	{

	return CoordL().ExtendL();

	}

EXPORT_C void CPermanentFileStore::DoDeleteL(TStreamId anId)

	{

	if (iCoord==NULL)

		__LEAVE(KErrNotFound);

//

	CoordL().DeleteL(anId);

	}

EXPORT_C void CPermanentFileStore::DoCommitL()

//

// Establish a new commit point, committing changes made since the last one.

//

	{

	if (iCoord!=NULL&&TrimL().CommitL(iRoot))

		{

		return;

		}

//

	SynchL();

	}

EXPORT_C void CPermanentFileStore::DoRevertL()

//

// Roll back to the state at the last commit point.

//

	{

	CPermanentStoreCoord* coord=iCoord;

	if (coord!=NULL&&coord->RevertL(iRoot))

		return;

//

	SynchL();

	}

EXPORT_C MIncrementalCollector* CPermanentFileStore::DoReclaimL()

	{

	return CPermanentStoreCollector::ReclaimerL(CoordL());

	}

EXPORT_C MIncrementalCollector* CPermanentFileStore::DoCompactL()

	{

	return CPermanentStoreCollector::CompactorL(TrimL());

	}

CPermanentStoreCoord& CPermanentFileStore::CoordL() const

	{

	CPermanentStoreCoord* coord=iCoord;

	if (coord==NULL)

		{

		coord=new(ELeave) CPermanentStoreCoord(KBase,Host());

		MUTABLE_CAST(CPermanentStoreCoord*&,iCoord)=coord;

		}

	else if (!Host().IsActive())

		CONST_CAST(CPermanentFileStore*,this)->RefreshL();

	return *coord;

	}

CPermanentStoreCoord& CPermanentFileStore::TrimL()

	{

	CPermanentStoreCoord& coord=CoordL();

	if (!coord.IsTrim())

		{

		TInt lim=coord.LimitL().Offset(); // it can be slightly smaller than this

		TInt size=Host().HostL()->SizeL();

		if (size>lim)

			SetSizeL(lim);

		coord.Clipped();

		}

	return coord;

	}

EXPORT_C CFileStore* CPermanentFileStore::DoNewL(RFile& aFile)

//

// Factory function creating a new file.

//

	{

	return new(ELeave) CPermanentFileStore(aFile);

	}