convergedcallengine/spsettings/src/spsbufferedpublisher.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 31 Aug 2010 15:45:17 +0300
branchRCL_3
changeset 19 7d48bed6ce0c
parent 0 ff3b6d0fd310
child 20 987c9837762f
permissions -rw-r--r--
Revision: 201033 Kit: 201035
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/*
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* Copyright (c)  Nokia Corporation and/or its subsidiary(-ies). 
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: Logic for bufferred publish and subcribe notifier
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*
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*/
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#include <e32property.h>
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#include "spdefaultvalues.h"
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#include "spsbufferedpublisher.h"
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const TUint32 KRealGlobalIndex = 0;
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_LIT( KSemaphore, "CSpsBufferedPublisher" );
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// ======== LOCAL FUNCTIONS ========
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// ---------------------------------------------------------------------------
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// ?description
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// ---------------------------------------------------------------------------
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//
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CSpsBufferedPublisher* CSpsBufferedPublisher::NewL( TUid aCategory, TUint aKey )
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    {
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    CSpsBufferedPublisher* self = new (ELeave) CSpsBufferedPublisher( aCategory, aKey );
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    CleanupStack::PushL( self );
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    self->ConstructL();
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    CleanupStack::Pop( self );
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    return self;
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    }
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// ---------------------------------------------------------------------------
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// ?description
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// ---------------------------------------------------------------------------
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//
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CSpsBufferedPublisher::CSpsBufferedPublisher( TUid aCategory, TUint aKey ):
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    iCategory( aCategory ),
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    iKey( aKey ),
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    iIndex( KErrNotReady )
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    {
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    }
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// ---------------------------------------------------------------------------
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// ?description
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// ---------------------------------------------------------------------------
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//
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CSpsBufferedPublisher::~CSpsBufferedPublisher()
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    {
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    }
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// ---------------------------------------------------------------------------
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// ?description
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// ---------------------------------------------------------------------------
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//
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void CSpsBufferedPublisher::ConstructL()
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    {
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    static _LIT_SECURITY_POLICY_PASS( KAllowAllPolicy );
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    TInt err = RProperty::Define( 
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            iCategory, iKey, 
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            RProperty::EByteArray,
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            KAllowAllPolicy, KAllowAllPolicy, 
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            RProperty::KMaxPropertySize );
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    if( !err )
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        {
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        TBuf8<RProperty::KMaxPropertySize> data;
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        data.FillZ( data.MaxLength() );
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        User::LeaveIfError( RProperty::Set( iCategory, iKey, data ) );
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        }
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    }
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// ---------------------------------------------------------------------------
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// ?description
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// ---------------------------------------------------------------------------
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//
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void CSpsBufferedPublisher::SetL( TUid aCategory, TUint aKey, TUint32 aData )
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    {
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    RSemaphore wait;
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    TInt err = wait.OpenGlobal( KSemaphore );
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    if ( err )
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        {
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        User::LeaveIfError( wait.CreateGlobal( KSemaphore, 1 ) );
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        }
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    wait.Wait();
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    TCleanupItem cleanup( CSpsBufferedPublisher::SignalAndCloseSemaphore, &wait );
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    CleanupStack::PushL( cleanup );
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    TBuf8<RProperty::KMaxPropertySize> data;
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    User::LeaveIfError(
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        RProperty::Get( aCategory, aKey, data ) );
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    // Increment index
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    GlobalIndex( data )++;
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    if( Base( data, GlobalIndex( data ) ) == GlobalIndex( data ) )
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        {
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        // Skip index if real index is same as KRealGlobalIndex
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        GlobalIndex( data )++;
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        }
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   114
        
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    // Write data to index
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    At( data, GlobalIndex( data ) ) = aData;
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    User::LeaveIfError(
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        RProperty::Set( aCategory, aKey, data ) );
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    CleanupStack::PopAndDestroy(); // wait
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    }
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// ---------------------------------------------------------------------------
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// ?description
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// ---------------------------------------------------------------------------
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//
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void CSpsBufferedPublisher::GetL( RArray<TUint32>& aData )
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    {
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    User::LeaveIfError( iIndex );
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    TBuf8<RProperty::KMaxPropertySize> data;
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    User::LeaveIfError(
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            RProperty::Get( iCategory, iKey, data ) );
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    const TUint32 lastModified = GlobalIndex( data );
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    const TUint32 indexDifference = lastModified - iIndex;
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    if( Max( data ) < indexDifference )
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        {
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        // If some of data is missed
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        iIndex = lastModified - Max( data );
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        }
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    // Start reading
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    while( lastModified != iIndex ) 
0
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        {
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        iIndex++;
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        if( Base( data, iIndex ) == iIndex )
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            {
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            // Skip index if real index is same as KRealGlobalIndex
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            iIndex++;
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            }
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        aData.AppendL( At(data, iIndex) );
0
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        }
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    }
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// ---------------------------------------------------------------------------
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// ?description
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// ---------------------------------------------------------------------------
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//
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void CSpsBufferedPublisher::Start()
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    {
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    if( KErrNone > iIndex )
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        {
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        TBuf8<RProperty::KMaxPropertySize> data;
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        RProperty::Get( iCategory, iKey, data );
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        if( data.Length() )
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            {
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            // When no error occurs
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            iIndex = GlobalIndex( data );
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            }
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        else
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            {
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            iIndex = 0;
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            }
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        }
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    }
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// ---------------------------------------------------------------------------
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// ?description
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// ---------------------------------------------------------------------------
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//
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void CSpsBufferedPublisher::Stop()
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    {
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    iIndex = KErrNotReady;
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    }
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// ---------------------------------------------------------------------------
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// ?description
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// ---------------------------------------------------------------------------
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//
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void CSpsBufferedPublisher::SignalAndCloseSemaphore( TAny* aPtr )
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    {
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    RSemaphore* wait = (RSemaphore*)aPtr;
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    wait->Signal();
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    wait->Close();
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    }
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// ---------------------------------------------------------------------------
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// ?description
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// ---------------------------------------------------------------------------
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//
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TUint32& CSpsBufferedPublisher::At( TDes8& aData, TInt aIndex )
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    {
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    const TUint32 baseIndex = Base( aData, aIndex );
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    TUint32 realIndex = aIndex - baseIndex;
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    ASSERT( KRealGlobalIndex != realIndex ); // Check if global index is not used
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    return (TUint32&)aData[ realIndex * sizeof(TUint32) ];
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    }
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// ---------------------------------------------------------------------------
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// ?description
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// ---------------------------------------------------------------------------
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//
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TUint CSpsBufferedPublisher::Max( TDesC8& aData )
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    {
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    return ( aData.Length() / sizeof(TUint32) );
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    }
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// ---------------------------------------------------------------------------
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// ?description
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// ---------------------------------------------------------------------------
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//
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TInt32 CSpsBufferedPublisher::Base( TDesC8& aData, TInt aIndex )
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    {
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    const TInt max = Max( aData );
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    return ( max * (TUint32)( aIndex / max ) );
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    }
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// ---------------------------------------------------------------------------
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// ?description
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// ---------------------------------------------------------------------------
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//
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TUint32& CSpsBufferedPublisher::GlobalIndex( TDes8& aData )
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    {
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    return (TUint32&)aData[ KRealGlobalIndex ];
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    }