--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hwpluginsimulation/mocksy/src/rotatingstrbuf.cpp	Tue Feb 02 01:41:59 2010 +0200
@@ -0,0 +1,88 @@
+// Copyright (c) 2006-2009 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:
+//
+
+
+#include "rotatingstrbuf.h"
+
+CRotatingStrBuf* CRotatingStrBuf::NewL(TInt aSize)
+	{
+	CRotatingStrBuf *self = new (ELeave) CRotatingStrBuf;
+	CleanupStack::PushL(self);
+	self->ConstructL(aSize);
+	CleanupStack::Pop();
+	return self;
+	}
+	
+CRotatingStrBuf::~CRotatingStrBuf()
+	{
+	TEntry* entry;
+	while (!iQueue.IsEmpty())
+		{
+		entry = iQueue.First();
+		entry->iLink.Deque();
+		delete entry->iText;
+		delete entry;
+		}
+	}
+
+CRotatingStrBuf::CRotatingStrBuf()
+	:iQueue(_FOFF(TEntry,iLink))
+	{
+	}
+
+void CRotatingStrBuf::ConstructL(TInt aSize)
+	{
+	for(TInt cnt=0; cnt<aSize; cnt++)
+		{
+		TEntry* entry = new (ELeave) TEntry;
+		entry->iText = NULL;
+		iQueue.AddLast(*entry);
+		}
+	}
+
+void CRotatingStrBuf::Put(const TDesC& aText)
+	{
+	TEntry* entry = iQueue.Last();
+	// move last entry to the top of the queue
+	entry->iLink.Deque();
+	iQueue.AddFirst(*entry);
+	// alocate/resize buffer
+	if (entry->iText == NULL)
+		entry->iText = HBufC::New(aText.Length());
+	else if (entry->iText->Des().MaxLength() < aText.Length())
+		entry->iText = entry->iText->ReAlloc(aText.Length());
+	// copy the text
+	if (entry->iText != NULL) // New or ReAlloc may have fail.
+		*entry->iText = aText;
+	}
+
+HBufC* CRotatingStrBuf::Get()
+	{
+	TDblQueIter<TEntry> iter(iQueue);
+	iter.SetToLast();
+
+	TEntry* entry;
+	while ((entry = iter--) != NULL && entry->iText == NULL)
+		{};
+	
+	if (entry != NULL)
+		{
+		HBufC* ret = entry->iText;
+		entry->iText = NULL;
+		return ret;
+		}
+	return NULL;
+	}
+