1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/mm/mmlibs/mmfw/Recogniser/src/bufferreader.cpp	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,99 @@
     1.4 +// Copyright (c) 2006-2009 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 "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 +//
    1.18 +
    1.19 +#include "readers.h"
    1.20 +
    1.21 +// Descriptors support a maximum of 2^28 bytes.
    1.22 +// The highest 4 bits are used for other purposes.
    1.23 +static const TInt KMaxDesLen = (2 << 28) - 1;
    1.24 +static const TInt KMinDesLen = -(2 << 28);		
    1.25 +
    1.26 +//
    1.27 +//
    1.28 +//
    1.29 +CBufferReader::CBufferReader(const TDesC8& aBuffer)
    1.30 + :	CReader(aBuffer, CReader::EBuffer)
    1.31 +	{
    1.32 +	}
    1.33 +	
    1.34 +//
    1.35 +//
    1.36 +//
    1.37 +CBufferReader::CBufferReader(const TDesC8& aBuffer, TReaderType aType)
    1.38 + :	CReader(aBuffer, aType)
    1.39 +	{
    1.40 +	}
    1.41 +	
    1.42 +//
    1.43 +//
    1.44 +//
    1.45 +CBufferReader::~CBufferReader()
    1.46 +	{
    1.47 +	}
    1.48 +
    1.49 +//
    1.50 +//
    1.51 +//
    1.52 +CBufferReader* CBufferReader::NewLC(const TDesC8& aBuffer)
    1.53 +	{
    1.54 +	CBufferReader* self = new(ELeave) CBufferReader(aBuffer);
    1.55 +	CleanupStack::PushL(self);
    1.56 +	self->ConstructL();
    1.57 +	return self;
    1.58 +	}
    1.59 +	
    1.60 +//
    1.61 +//
    1.62 +//
    1.63 +void CBufferReader::ConstructL()
    1.64 +	{
    1.65 +	}
    1.66 +
    1.67 +//
    1.68 +//
    1.69 +//
    1.70 +void CBufferReader::Reset()
    1.71 +	{
    1.72 +	CReader::Reset();
    1.73 +	}
    1.74 +
    1.75 +//
    1.76 +//
    1.77 +//
    1.78 +void CBufferReader::SeekL(TInt64 aOffset)
    1.79 +	{
    1.80 +	// Symbian OS descriptors support a maximum size of 2^28 bytes.
    1.81 +	if (aOffset > (TInt64)KMaxDesLen)
    1.82 +		{
    1.83 +		User::Leave(KErrNotSupported);
    1.84 +		}
    1.85 +		
    1.86 +	if (aOffset < (TInt64)KMinDesLen)
    1.87 +		{
    1.88 +		User::Leave(KErrNotSupported);
    1.89 +		}
    1.90 +	
    1.91 +	TInt low = (TInt)I64LOW(aOffset);
    1.92 +	SeekL(low);
    1.93 +	}
    1.94 +
    1.95 +//
    1.96 +//
    1.97 +//
    1.98 +void CBufferReader::SeekL(TInt aOffset)
    1.99 +	{
   1.100 +	User::LeaveIfError(CReader::Seek(aOffset));
   1.101 +	}
   1.102 +