diff -r 000000000000 -r bde4ae8d615e os/persistentdata/persistentstorage/store/pcstore/src/filestreambuf.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/os/persistentdata/persistentstorage/store/pcstore/src/filestreambuf.h	Fri Jun 15 03:10:57 2012 +0200
@@ -0,0 +1,81 @@
+// 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:
+//
+
+#if !defined(__FILESTREAMBUF_H__)
+#define __FILESTREAMBUF_H__
+
+#include <stdio.h>
+#include <pcstore/streamid.h>
+
+namespace PCStore
+{
+class CDirectFileStore;
+
+/**
+@internalComponent
+ 
+A file stream buffer that provides I/O interfaces for streamed data.
+
+This file stream buffer: 
+. is unbuffered: all data passed to it will immediately be written to the corresponding file
+  or returned to its caller.
+
+. provides read or write capability: it opens the file in read or write mode. After it is 
+  instantiated, only read or write function can be called, depending on the file open mode. 
+  Exception will be thrown upon an unmatching call.
+
+. is unseekable. It only moves the file pointer to the position represented by the stream id, 
+  which is passed to its constructor. In the subsequent read or write operations, the pointer 
+  always goes forward.
+
+For each file store, one object of this class is created in the constructor of CDirectFileStore. 
+CDirectFileStore will pass the reference of this object to the stream it creates. In order to 
+ensure there is only one stream opened in any moment, streams will call the StreamOpen and 
+StreamClose methods respectively in their constructor and destructor to signal their open 
+and close.
+
+@see CDirectFileStore 
+@see CStoreWriteStream
+@see CStoreReadStream
+*/
+class CFileStreamBuf
+	{
+public:
+	//Enumerations for the file open mode
+	enum TFileMode 
+	{
+	EReadFile=0,
+	EWriteFile=1
+	};
+
+public:
+	CFileStreamBuf(const char* aFileName, TFileMode aMode);
+	~CFileStreamBuf();
+	void StreamOpen(TStreamId aStreamId);
+	void StreamClose();
+	TStreamId GetNewStreamId();
+	void Read(const TUint8* aPtr, TInt32 aLength);
+	void Write(const TUint8* aPtr, TInt32 aLength);
+
+private:
+	CFileStreamBuf(const CFileStreamBuf& aBuf); 
+	CFileStreamBuf& operator=(const CFileStreamBuf& aBuf); 
+
+private:
+	FILE* iFile;
+	TBool iStreamOpened;
+	};
+}
+#endif // !defined(__FILESTREAMBUF_H__)