--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browserutilities/favouritesengine/ClientServer/src/FavouritesBuf.cpp	Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,138 @@
+/*
+* Copyright (c) 2004 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: 
+*      Implementation of class RFavouritesBuf
+*      
+*
+*/
+
+
+// INCLUDE FILES
+
+#include "FavouritesBuf.h"
+#include "FavouritesMsg.h"
+#include "FavouritesPanic.h"
+
+// ================= MEMBER FUNCTIONS =======================
+
+// ---------------------------------------------------------
+// RFavouritesBuf::Open
+// ---------------------------------------------------------
+//
+TInt RFavouritesBuf::Open( RFavouritesSession& aSess )
+    {
+	SetBuf( ERead | EWrite, iBuf.iData, iBuf.iData );   // Empty.
+    return RFavouritesHandle::Open( aSess, EFavengOpenStream, TIpcArgs() );
+    }
+
+// ---------------------------------------------------------
+// RFavouritesBuf::Open
+// ---------------------------------------------------------
+//
+TInt RFavouritesBuf::Open
+( RFavouritesHandle& aHandle, TInt aFunction, TIpcArgs& aArgs )
+    {
+    iBuf.iLen = 0;
+	SetBuf( ERead | EWrite, iBuf.iData, iBuf.iData );   // Initially empty.
+    TPckg<TFavouritesBuf> buf( iBuf );
+    aArgs.Set( 3, &buf );
+    TInt err = RFavouritesHandle::Open( aHandle, aFunction, aArgs );
+    if ( !err && iBuf.iLen > 0 )
+        {
+        // If aFunction provided data, it is already here.
+        SetEnd( ERead, iBuf.iData + iBuf.iLen );
+        }
+    return err;
+    }
+
+// ---------------------------------------------------------
+// RFavouritesBuf::Close()
+// ---------------------------------------------------------
+//
+void RFavouritesBuf::Close()
+    {
+    // Resolve RFavouritesHandle::Close() vs. TStreamBuf::Close() ambiguity.
+    // Mind the order: TStreamBuf::Close calls SynchL -> needs an open buf.
+    TStreamBuf::Close();
+    RFavouritesHandle::Close();
+    }
+
+// ---------------------------------------------------------
+// RFavouritesBuf::UnderflowL()
+// ---------------------------------------------------------
+//
+TInt RFavouritesBuf::UnderflowL( TInt /*aMaxLength*/ )
+    {
+    __ASSERT_DEBUG( Avail( ERead ) == 0, \
+        FavouritesPanic( EFavouritesInternal ) );
+    return IpcReadL();
+    }
+
+// ---------------------------------------------------------
+// RFavouritesBuf::OverflowL()
+// ---------------------------------------------------------
+//
+void RFavouritesBuf::OverflowL()
+    {
+    __ASSERT_DEBUG( Avail( EWrite ) == 0, \
+        FavouritesPanic( EFavouritesInternal ) );
+    IpcWriteL();
+    }
+
+// ---------------------------------------------------------
+// RFavouritesBuf::DoSynchL()
+// ---------------------------------------------------------
+//
+void RFavouritesBuf::DoSynchL()
+    {
+    if ( Lag( ERead ) )
+        {
+        // Read lag unexpected, we do not support seeking.
+        User::Leave( KErrNotSupported );
+        }
+    IpcWriteL();    // Flush write lag.
+	SetBuf( ERead | EWrite, iBuf.iData, iBuf.iData );
+    }
+
+// ---------------------------------------------------------
+// RFavouritesBuf::IpcReadL()
+// ---------------------------------------------------------
+//
+TInt RFavouritesBuf::IpcReadL()
+    {
+	TPtr8 des( iBuf.iData, KFavouritesStreamBufSize );
+    TInt len = User::LeaveIfError
+        ( SendReceive( EFavengStreamRead, TIpcArgs( &des ) ) );
+    SetBuf( EWrite, iBuf.iData, iBuf.iData );
+    SetBuf( ERead, iBuf.iData, iBuf.iData + len );
+    return len;
+    }
+
+// ---------------------------------------------------------
+// RFavouritesBuf::IpcWriteL()
+// ---------------------------------------------------------
+//
+void RFavouritesBuf::IpcWriteL()
+    {
+    if ( Lag( EWrite ) )
+        {
+        TPtrC8 ptr( iBuf.iData, Lag( EWrite ) );
+        User::LeaveIfError
+            ( SendReceive( EFavengStreamWrite, TIpcArgs( &ptr ) ) );
+        }
+    SetBuf( ERead, iBuf.iData, iBuf.iData );
+    SetBuf( EWrite, iBuf.iData, iBuf.iData + KFavouritesStreamBufSize );
+    }
+
+//  End of File