// Copyright (c) 2006-2009 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 "readers.h"

// Descriptors support a maximum of 2^28 bytes.

// The highest 4 bits are used for other purposes.

static const TInt KMaxDesLen = (2 << 28) - 1;

static const TInt KMinDesLen = -(2 << 28);		

//

//

//

CBufferReader::CBufferReader(const TDesC8& aBuffer)

 :	CReader(aBuffer, CReader::EBuffer)

	{

	}

//

//

//

CBufferReader::CBufferReader(const TDesC8& aBuffer, TReaderType aType)

 :	CReader(aBuffer, aType)

	{

	}

//

//

//

CBufferReader::~CBufferReader()

	{

	}

//

//

//

CBufferReader* CBufferReader::NewLC(const TDesC8& aBuffer)

	{

	CBufferReader* self = new(ELeave) CBufferReader(aBuffer);

	CleanupStack::PushL(self);

	self->ConstructL();

	return self;

	}

//

//

//

void CBufferReader::ConstructL()

	{

	}

//

//

//

void CBufferReader::Reset()

	{

	CReader::Reset();

	}

//

//

//

void CBufferReader::SeekL(TInt64 aOffset)

	{

	// Symbian OS descriptors support a maximum size of 2^28 bytes.

	if (aOffset > (TInt64)KMaxDesLen)

		{

		User::Leave(KErrNotSupported);

		}

	if (aOffset < (TInt64)KMinDesLen)

		{

		User::Leave(KErrNotSupported);

		}

	TInt low = (TInt)I64LOW(aOffset);

	SeekL(low);

	}

//

//

//

void CBufferReader::SeekL(TInt aOffset)

	{

	User::LeaveIfError(CReader::Seek(aOffset));

	}