/*

* 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::CExpression

*

*/

/**

 @file sisexpression.cpp

*/

#include "sisexpression.h"

#include "sisstring.h"

using namespace Swi::Sis;

EXPORT_C /*static*/ CExpression* CExpression::NewLC(MSisDataProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour)

	{

	CExpression* self = new(ELeave) CExpression();

	CleanupStack::PushL(self);

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

	return self;

	}

EXPORT_C /*static*/ CExpression* CExpression::NewL(MSisDataProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour)

	{

	CExpression* self = NewLC(aDataProvider, aBytesRead, aTypeReadBehaviour);

	CleanupStack::Pop(self);

	return self;

	}

EXPORT_C CExpression* CExpression::NewLC(TPtrProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour)

	{

	CExpression* self = new (ELeave) CExpression;

	CleanupStack::PushL(self);

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

	return self;

	}

EXPORT_C CExpression* CExpression::NewL(TPtrProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour)

	{

	CExpression* self = CExpression::NewLC(aDataProvider, aBytesRead, aTypeReadBehaviour);

	CleanupStack::Pop(self);

	return self;

	}

CExpression::CExpression()

	{

	}

EXPORT_C CExpression::~CExpression()

	{

	delete iLeftExpression;

	delete iRightExpression;

	delete iString;

	}

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

	{

	TInt64 fieldOffset = aBytesRead;

	CField::ConstructL(aDataProvider, EFieldTypeExpression, aBytesRead, aTypeReadBehaviour);

	CField::ReadEnumL<TOperator,TUint32>(aDataProvider, iOperator, aBytesRead);

	CField::ReadTTypeL(aDataProvider, iIntegerValue, aBytesRead);

	switch (iOperator)

		{

	case EBinOpEqual:

	case EBinOpNotEqual:

	case EBinOpGreaterThan:

	case EBinOpLessThan:

	case EBinOpGreaterOrEqual:

	case EBinOpLessOrEqual:

	case ELogOpAnd:

	case ELogOpOr:

	case EFuncAppProperties:

		iLeftExpression=CExpression::NewL(aDataProvider, aBytesRead);

		iRightExpression=CExpression::NewL(aDataProvider, aBytesRead);

		break;

	case EUnaryOpNot:

	case EFuncDevProperties:

		iLeftExpression=CExpression::NewL(aDataProvider, aBytesRead);

		break;

	case EFuncExists:

	case EPrimTypeString:

		iString=CString::NewL(aDataProvider, aBytesRead);

		break;

	case EPrimTypeOption:	// All these are stored using iIntegerValue only

	case EPrimTypeVariable:

	case EPrimTypeNumber:

		break;

	default:

		User::Leave(KErrSISExpressionUnknownOperator);

		}

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

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

	}

void CExpression::ConstructL(TPtrProvider& aDataProvider, TInt64& aBytesRead, TReadTypeBehaviour aTypeReadBehaviour)

	{

	TInt64 fieldOffset = aBytesRead;

	CField::ConstructL(aDataProvider, EFieldTypeExpression, aBytesRead, aTypeReadBehaviour);

	CField::ReadEnumL<TOperator,TUint32>(aDataProvider, iOperator, aBytesRead);

	CField::ReadTTypeL(aDataProvider, iIntegerValue, aBytesRead);

	switch (iOperator)

		{

	case EBinOpEqual:

	case EBinOpNotEqual:

	case EBinOpGreaterThan:

	case EBinOpLessThan:

	case EBinOpGreaterOrEqual:

	case EBinOpLessOrEqual:

	case ELogOpAnd:

	case ELogOpOr:

	case EFuncAppProperties:

		iLeftExpression=CExpression::NewL(aDataProvider, aBytesRead);

		iRightExpression=CExpression::NewL(aDataProvider, aBytesRead);

		break;

	case EUnaryOpNot:

	case EFuncDevProperties:

		iLeftExpression=CExpression::NewL(aDataProvider, aBytesRead);

		break;

	case EFuncExists:

	case EPrimTypeString:

		iString=CString::NewL(aDataProvider, aBytesRead);

		break;

	case EPrimTypeOption:	// All these are stored using iIntegerValue only

	case EPrimTypeVariable:

	case EPrimTypeNumber:

		break;

	default:

		User::Leave(KErrSISExpressionUnknownOperator);

		}

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

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

	}