/*

* Copyright (c) 2006-2009 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: 

*

*/

#include <stdexcept>

#include "cardinality.h"

#include "deserialiser.h"

#include "serialiser.h"

const TInt KShiftCardinality8=1;

const TInt KShiftCardinality16=2;

const TInt KShiftCardinality32=3;

const TUint8  KMaxTUint8=0xFF;

const TUint16 KMaxTUint16=0xFFFF;

Cardinality::Cardinality ()

	{

	}

Cardinality::~Cardinality ()

	{

	}

void Cardinality::Internalize(Deserialiser& des)

	{

	TUint8 x;

	des >> x;

	TUint32 n=x;

	if ((n&0x1)==0)

		n>>=KShiftCardinality8;

	else if ((n&0x2)==0)

		{

		des >> x;

		n+=x<<8;

		n>>=KShiftCardinality16;

		}

	else if ((n&0x4)==0)

		{

		des >> x;

		TUint32 t = x << 16;

		des >> x;

		t += x << 8;

		des >> x;

		t += x;

		n+=TUint32(iSize)<<8; // platform dependency

		n>>=KShiftCardinality32;

		}

	else

		{

		throw std::runtime_error("corrupt cardinality");

		}

	iSize=n;

	}

void Cardinality::Externalize(Serialiser& ser)

	{

	TUint32 n=iSize;

	if (n<=(KMaxTUint8>>KShiftCardinality8))

		{

			TUint8 x = n<<KShiftCardinality8;

			ser << x;

		}

	else if (n<=(KMaxTUint16>>KShiftCardinality16))

		{

			TUint16 x = (TUint16)(n<<KShiftCardinality16)+0x1;

			ser << x;

		}

	else

		{

			n = (n<<KShiftCardinality32)+0x3;

			ser << n;

		}

	}