sl@0: // Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: #include "readers.h"
sl@0: 
sl@0: // Descriptors support a maximum of 2^28 bytes.
sl@0: // The highest 4 bits are used for other purposes.
sl@0: static const TInt KMaxDesLen = (2 << 28) - 1;
sl@0: static const TInt KMinDesLen = -(2 << 28);		
sl@0: 
sl@0: //
sl@0: //
sl@0: //
sl@0: CBufferReader::CBufferReader(const TDesC8& aBuffer)
sl@0:  :	CReader(aBuffer, CReader::EBuffer)
sl@0: 	{
sl@0: 	}
sl@0: 	
sl@0: //
sl@0: //
sl@0: //
sl@0: CBufferReader::CBufferReader(const TDesC8& aBuffer, TReaderType aType)
sl@0:  :	CReader(aBuffer, aType)
sl@0: 	{
sl@0: 	}
sl@0: 	
sl@0: //
sl@0: //
sl@0: //
sl@0: CBufferReader::~CBufferReader()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: //
sl@0: //
sl@0: //
sl@0: CBufferReader* CBufferReader::NewLC(const TDesC8& aBuffer)
sl@0: 	{
sl@0: 	CBufferReader* self = new(ELeave) CBufferReader(aBuffer);
sl@0: 	CleanupStack::PushL(self);
sl@0: 	self->ConstructL();
sl@0: 	return self;
sl@0: 	}
sl@0: 	
sl@0: //
sl@0: //
sl@0: //
sl@0: void CBufferReader::ConstructL()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: //
sl@0: //
sl@0: //
sl@0: void CBufferReader::Reset()
sl@0: 	{
sl@0: 	CReader::Reset();
sl@0: 	}
sl@0: 
sl@0: //
sl@0: //
sl@0: //
sl@0: void CBufferReader::SeekL(TInt64 aOffset)
sl@0: 	{
sl@0: 	// Symbian OS descriptors support a maximum size of 2^28 bytes.
sl@0: 	if (aOffset > (TInt64)KMaxDesLen)
sl@0: 		{
sl@0: 		User::Leave(KErrNotSupported);
sl@0: 		}
sl@0: 		
sl@0: 	if (aOffset < (TInt64)KMinDesLen)
sl@0: 		{
sl@0: 		User::Leave(KErrNotSupported);
sl@0: 		}
sl@0: 	
sl@0: 	TInt low = (TInt)I64LOW(aOffset);
sl@0: 	SeekL(low);
sl@0: 	}
sl@0: 
sl@0: //
sl@0: //
sl@0: //
sl@0: void CBufferReader::SeekL(TInt aOffset)
sl@0: 	{
sl@0: 	User::LeaveIfError(CReader::Seek(aOffset));
sl@0: 	}
sl@0: