1 /*

     2 * Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the License "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 * Definition of the Swi::Sis::CCrc

    16 *

    17 */

    18 

    19 

    20 #include "siscrc.h"

    21 

    22 using namespace Swi::Sis;

    23 

    24 /*static*/ CCrc* CCrc::NewLC(MSisDataProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour)

    25 	{

    26 	CCrc* self = new(ELeave) CCrc();

    27 	CleanupStack::PushL(self);

    28 	self->ConstructL(aDataProvider, aBytesRead, aTypeReadBehaviour);

    29 	return self;

    30 	}

    31 

    32 /*static*/ CCrc* CCrc::NewL(MSisDataProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour)

    33 	{

    34 	CCrc* self = NewLC(aDataProvider, aBytesRead, aTypeReadBehaviour);

    35 	CleanupStack::Pop(self);

    36 	return self;

    37 	}

    38 

    39 CCrc::CCrc()

    40 	{

    41 	}

    42 

    43 CCrc::~CCrc()

    44 	{

    45 	}

    46 

    47 void CCrc::ConstructL(MSisDataProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour)

    48 	{

    49 	

    50 	TInt64 fieldOffset = aBytesRead;

    51 	

    52 	if (aTypeReadBehaviour == EReadType)

    53 		{

    54 		TFieldType fieldType;

    55 		CField::ReadEnumL<TFieldType,TUint32>(aDataProvider, fieldType, aBytesRead);

    56 

    57 		if ((fieldType != EFieldTypeControllerCRC) || (fieldType != EFieldTypeDataCRC))

    58 			{

    59 			User::Leave(KErrSISUnexpectedFieldType);			

    60 			}

    61 		}

    62 	else

    63 		{

    64 		CField::ConstructL(aDataProvider, EFieldTypeControllerCRC, aBytesRead, aTypeReadBehaviour);			

    65 		}

    66 

    67 	CField::ReadTTypeL(aDataProvider, iChecksum, aBytesRead);

    68 	CField::SkipUnknownFieldsL(aDataProvider, aBytesRead - fieldOffset, aBytesRead, aTypeReadBehaviour);

    69 	CField::EnsureAlignedL(aDataProvider, aBytesRead - fieldOffset, aBytesRead, aTypeReadBehaviour);

    70 	}