// 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;		

 			}

 		}

 	}