diff -r 000000000000 -r ba25891c3a9e installationservices/swi/source/sisfile/sisdata.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/installationservices/swi/source/sisfile/sisdata.cpp	Thu Dec 17 08:51:10 2009 +0200
@@ -0,0 +1,128 @@
+/*
+* Copyright (c) 2004-2009 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: 
+* Definition of the Swi::Sis::CData
+*
+*/
+
+
+/**
+ @file
+ @internalComponent
+*/
+#include "sisdata.h"
+#include "sisdataunit.h"
+
+namespace Swi
+{
+namespace Sis
+{
+
+/*static*/ CData* CData::NewLC(MSisDataProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour)
+	{
+	CData* self = new(ELeave) CData(aDataProvider);
+	CleanupStack::PushL(self);
+	self->ConstructL(aBytesRead, aTypeReadBehaviour);
+	return self;
+	}
+
+/*static*/ CData* CData::NewL(MSisDataProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour)
+	{
+	CData* self = NewLC(aDataProvider, aBytesRead, aTypeReadBehaviour);
+	CleanupStack::Pop(self);
+	return self;
+	}
+
+CData::CData(MSisDataProvider& aDataProvider) : iDataProvider(aDataProvider)
+	{
+	}
+
+CData::~CData()
+	{
+	iDataUnits.ResetAndDestroy();	
+	}
+
+void CData::ConstructL(TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour)
+	{
+	TInt64 arrayBytes = 0;	
+	CField::ConstructL(iDataProvider, EFieldTypeData, aBytesRead, aTypeReadBehaviour);	
+
+	// Remember the offset where the data begins
+	User::LeaveIfError(iDataProvider.Seek(ESeekCurrent, iOffset));
+	ReadMemberArrayL(iDataProvider, iDataUnits, EFieldTypeDataUnit, arrayBytes, EReadType);
+
+	// Calculate CRC of header and field data by reading the entire header and field
+	TInt64 fieldOffset = iOffset - HeaderSize();
+	User::LeaveIfError(iDataProvider.Seek(ESeekStart, fieldOffset));
+	CField::CalculateCrcL(iDataProvider, HeaderSize() + Length() + PaddingSize(), iCrc );
+	aBytesRead += Length() + PaddingSize();
+	}
+
+void CData::ReadDataL(RFile& aFile, TInt aFileIndex, TInt aDataUnit)
+	{
+	if ((aFileIndex < 0) || ((aDataUnit < 0) || (aDataUnit >= iDataUnits.Count())))
+		{
+		User::Leave(KErrCorrupt);
+		}
+	iDataUnits[aDataUnit]->ExtractDataFileL(aFile, aFileIndex);
+	}
+
+void CData::ReadDataL(RFile& aFile, TInt aFileIndex, TInt aDataUnit, TInt64 aLength)
+	{
+	if ((aFileIndex < 0) || ((aDataUnit < 0) || (aDataUnit >= iDataUnits.Count())))
+		{
+		User::Leave(KErrCorrupt);
+		}
+	iDataUnits[aDataUnit]->ExtractDataFileL(aFile, aFileIndex, aLength);
+	}
+
+void CData::AppendStubDataFieldL(RWriteStream& aWriteStream)
+	{
+	// The data field has the following structure
+	
+	//	Object 				Object Size (bytes)	Value
+	//	FieldType 			4					EFieldTypeData		
+	//  FieldLength			4					12
+	//  data				12					The empty Data unit array 
+	
+	//  The empty data unit array inside the Data field has the following structure
+	
+	//	Object 				Object Size (bytes)	Value
+	//  FieldType			4					EFieldTypeArray
+	//	FieldLength			4					4
+	// 	ArrayType			4					EFieldTypeDataUnit
+	
+	
+	// append the EFieldTypeData header to the stream
+	TBuf8<3 * sizeof(TInt32)> header;
+	CField::CreateHeader(EFieldTypeData, TInt64(12), header);
+	aWriteStream.WriteL(header);
+	
+	// append an empty array header to the stream
+	CField::CreateHeader(EFieldTypeArray, TInt64(4), header);
+	aWriteStream.WriteL(header);
+	
+	// append the array type to the stream
+	TInt32 arrayType;
+	TPckg<TInt32> pckg(arrayType);
+	arrayType = static_cast<TInt32>(EFieldTypeDataUnit);
+	aWriteStream.WriteL(pckg);
+	}
+
+
+} //namespace Sis
+
+} //namespace Swi
+
+