// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the License "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:

// e32\kernel\scmvariantdata.cpp

// Core dump server - Variant Data for System Crash

// 

//

#include <scmdatatypes.h>

namespace Debug

	{

	/**

	 * TVariantSpecificData implementation

	 * @internal technology

	 */

	/**

	 * TVariantSpecificData constructor

	 */

	TVariantSpecificData::TVariantSpecificData() :

		iId(ESCMVariantData)

		,iVersion(EVariantSpecificDataVersion1)

		,iSize(0)

		{			

		}

	/**

	 * Writes this classes data to the specified byte stream

	 * @param aWriter byte stream to use

	 * @return void

	 */	

	TInt TVariantSpecificData::Serialize(TByteStreamWriter& aWriter)

		{

		TInt startPos = aWriter.CurrentPosition();

		if(iId != ESCMVariantData)

			{

			CLTRACE("TVariantSpecificData::Serialize Corrupt ID");

			return KErrCorrupt;

			}

		// ID saved first 

		aWriter.WriteInt(iId);		 				    // 4		

		aWriter.WriteShort((TUint16) iVersion);			// 2

		if(iVersion == EVariantSpecificDataVersion1)

			{

			// write data v1 format					

			aWriter.WriteInt(iSize); 			 	// 4

			}

		else

			{

			CLTRACE("TVariantSpecificData::Serialize Unsupported version");

			return KErrCorrupt;

			}

		TInt endPos = aWriter.CurrentPosition();

		if( endPos - startPos != GetSize())

			{

			// error between actual size & real size in data

			CLTRACE("TVariantSpecificData::Serialize serialization size error");	

			return KErrCorrupt;

			}

		return KErrNone;

		}

	/**

	 * Reads the classes data from the specified byte stream

	 * @param aReader Byte stream to use

	 * @return void

	 */

	TInt TVariantSpecificData::Deserialize(TByteStreamReader& aReader)

		{

		TInt startPos = aReader.CurrentPosition();

		iId = (SCMStructId)aReader.ReadInt();					// 4

		if(iId != ESCMVariantData)

			{

			CLTRACE("TVariantSpecificData::Deserialize Corrupt ID read");

			return KErrCorrupt;

			}

		iVersion = (TVariantSpecificDataVersion)aReader.ReadShort();			// 2

		if(iVersion == EVariantSpecificDataVersion1)

			{

			// read data v1 format	

			iSize = aReader.ReadInt();		 				// 4

			}

		else

			{

			iId = ESCMLast;	//unrecognised header

			CLTRACE("TVariantSpecificData::Deserialize Unsupported version");

			return KErrCorrupt;

			}

		TInt endPos = aReader.CurrentPosition();

		if( endPos - startPos != GetSize())

			{

			iId = ESCMLast;	//unrecognised header

			// error between actual size & real size in data

			CLTRACE("TVariantSpecificData::Deserialize serialization size error");	

			return KErrCorrupt;

			}

		return KErrNone;

		}

	/**

	 * Returns the externalised size of this class

	 * @return TInt size

	 */

	TInt TVariantSpecificData::GetSize() const

		{

		if(iVersion == EVariantSpecificDataVersion1)

			{

			return 10;

			}

		else

			{

			CLTRACE("TThreadData::GetSize Unsupported version");			

			return KErrNotSupported;		

			}

		}

	}