1 /*

     2 * Copyright (c) 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 "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 using System;

    19 using System.Collections.Generic;

    20 using System.Text;

    21 using SymbianUtils.BasicTypes;

    22 using SymbianETMLib.Common.Types;

    23 using SymbianETMLib.Common.Packets;

    24 using SymbianETMLib.Common.Exception;

    25 

    26 namespace SymbianETMLib.Common.State

    27 {

    28     public class ETMDecodeStateASync : ETMDecodeState

    29     {

    30         #region Constructors

    31         public ETMDecodeStateASync( ETMStateData aManager )

    32             : base( aManager )

    33         {

    34         }

    35         #endregion

    36 

    37         #region API

    38         public override ETMDecodeState HandleByte( SymByte aByte )

    39         {

    40             ETMDecodeState nextState = this;

    41             //

    42             if ( aByte == 0 )

    43             {

    44                 ++iASyncConsecutiveNullByteCount;

    45             }

    46             else if ( aByte == 0x80 && iASyncConsecutiveNullByteCount == 5 )

    47             {

    48                 // That's the start of the a-sync packet

    49                 iASyncConsecutiveNullByteCount = 0;

    50                 base.StateData.SetSynchronized();

    51                 nextState = new ETMDecodeStateSynchronized( base.StateData );

    52                 Trace();

    53             }

    54             else

    55             {

    56                 // Invalid byte

    57                 throw new ETMException( "ERROR - data is corrupt - expected null byte or end marker during A-SYNC" );

    58             }

    59             //

    60             return nextState;

    61         }

    62         #endregion

    63 

    64         #region Properties

    65         #endregion

    66 

    67         #region Internal methods

    68         private void Trace()

    69         {

    70             base.DbgTrace( "A-SYNC", string.Empty );

    71         }

    72         #endregion

    73 

    74         #region From System.Object

    75         #endregion

    76 

    77         #region Data members

    78         private int iASyncConsecutiveNullByteCount = 0;

    79         #endregion

    80     }

    81 }