/*

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

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "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: 

*

*/

using System;

using System.Collections.Generic;

using System.Text;

using SymbianUtils.BasicTypes;

using SymbianETMLib.Common.Types;

using SymbianETMLib.Common.Packets;

namespace SymbianETMLib.Common.State

{

    public class ETMDecodeStateContextID : ETMDecodeState

    {

        #region Constructors

        public ETMDecodeStateContextID( ETMStateData aManager )

            : base( aManager )

        {

            iContextIdBytesRequired = aManager.Config.ContextIDSize;

            iBytesRemaining = iContextIdBytesRequired;

        }

        #endregion

        #region API

        public override ETMDecodeState HandleByte( SymByte aByte )

        {

            // TODO: test this

            ETMDecodeState nextState = this;

            //

            int byteNumber = iContextIdBytesRequired - iBytesRemaining;

            uint val = aByte.LShift( byteNumber * 8 );

            iContextId |= val;

            //

            if ( --iBytesRemaining == 0 )

            {

                // Got everything

                base.StateData.SetContextID( iContextId );

                nextState = new ETMDecodeStateSynchronized( base.StateData );

            }

            //

            return nextState;

        }

        #endregion

        #region Properties

        public string ContextIDName

        {

            get

            {

                string ret = base.StateData.Config.GetContextID( iContextId );

                return ret;

            }

        }

        #endregion

        #region Internal methods

        private void Trace()

        {

            base.DbgTrace( "CONTEXT_ID", string.Format( "ID: {0} [{1}]", iContextId, ContextIDName ) );

        }

        #endregion

        #region From System.Object

        #endregion

        #region Data members

        private readonly int iContextIdBytesRequired;

        private uint iContextId = 0;

        private int iBytesRemaining = 0;

        #endregion

    }

}