--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/appfw/apparchitecture/apgrfx/apgcommonutils.h	Tue Aug 31 15:24:25 2010 +0300
@@ -0,0 +1,96 @@
+// Copyright (c) 2010 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:
+//
+
+#ifndef __APGCOMMONUTILS_H__
+#define __APGCOMMONUTILS_H__
+
+#include <e32base.h>
+#include <s32strm.h>
+#include <s32buf.h>
+#include<usif/scr/appregentries.h>
+
+
+/**
+Implementation of the MStreamBuf interface that throws away all
+data written to it but keeps track of how many bytes have been
+written to it.  It does not support reading.
+*/
+class TNullBuf : public MStreamBuf
+    {
+public:
+    inline TNullBuf();
+    inline TUint BytesWritten();
+private:
+    inline virtual void DoWriteL(const TAny* aPtr,TInt aLength);
+private:
+    TUint iBytesWritten;
+    };
+
+/**
+A write stream that throws away all its input, but keeps track of how many
+bytes have been written to it.  It is used for determining the amount of
+memory needed to store externalised objects.
+*/
+class RNullWriteStream : public RWriteStream
+    {
+public:
+    inline RNullWriteStream();
+    inline TUint BytesWritten();
+private:
+    TNullBuf iSink;
+    };
+
+inline TNullBuf::TNullBuf() : iBytesWritten(0) 
+    {
+    }
+
+inline TUint TNullBuf::BytesWritten() 
+    {
+    return iBytesWritten;
+    }
+
+inline void TNullBuf::DoWriteL(const TAny*,TInt aLength)
+    {
+    iBytesWritten += aLength;
+    }
+
+inline RNullWriteStream::RNullWriteStream()
+    {
+    Attach(&iSink);
+    }
+
+inline TUint RNullWriteStream::BytesWritten()
+    {
+    return iSink.BytesWritten();
+    }
+
+template <class T>
+TInt GetObjectSizeL(T* aObject)
+    {
+    TInt size(0);
+    if(aObject)
+        {
+        RNullWriteStream nullstream;
+        CleanupClosePushL(nullstream);
+        nullstream << *aObject;
+        nullstream.CommitL();
+        size = nullstream.BytesWritten();
+        CleanupStack::PopAndDestroy(&nullstream);
+        return size;
+        }
+    return -1;
+    }
+
+#endif //__APGCOMMONUTILS_H__