1 /*

     2 * Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the License "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *

    16 */

    17 

    18 

    19 #include <stdexcept>

    20 #include "cardinality.h"

    21 #include "deserialiser.h"

    22 #include "serialiser.h"

    23 

    24 const TInt KShiftCardinality8=1;

    25 const TInt KShiftCardinality16=2;

    26 const TInt KShiftCardinality32=3;

    27 

    28 const TUint8  KMaxTUint8=0xFF;

    29 const TUint16 KMaxTUint16=0xFFFF;

    30 

    31 Cardinality::Cardinality ()

    32 	{

    33 	}

    34 

    35 Cardinality::~Cardinality ()

    36 	{

    37 	}

    38 

    39 void Cardinality::Internalize(Deserialiser& des)

    40 	{

    41 	TUint8 x;

    42 	des >> x;

    43 	TUint32 n=x;

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

    45 		n>>=KShiftCardinality8;

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

    47 		{

    48 		des >> x;

    49 		n+=x<<8;

    50 		n>>=KShiftCardinality16;

    51 		}

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

    53 		{

    54 		des >> x;

    55 		TUint32 t = x << 16;

    56 		des >> x;

    57 		t += x << 8;

    58 		des >> x;

    59 		t += x;

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

    61 		n>>=KShiftCardinality32;

    62 		}

    63 	else

    64 		{

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

    66 		}

    67 	iSize=n;

    68 	}

    69 void Cardinality::Externalize(Serialiser& ser)

    70 	{

    71 	TUint32 n=iSize;

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

    73 		{

    74 			TUint8 x = n<<KShiftCardinality8;

    75 			ser << x;

    76 		}

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

    78 		{

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

    80 			ser << x;

    81 		}

    82 	else

    83 		{

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

    85 			ser << n;

    86 		}

    87 

    88 	}

    89