/*

* Copyright (c) 2002-2007 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:  Skin server's file buffer.

*

*/

#ifndef AKNSSRVFILEBUFFER_H

#define AKNSSRVFILEBUFFER_H

// INCLUDE FILES

#include <e32std.h>

#include <f32file.h>

#include <caf/caf.h>

// CLASS DECLARATION

/**

* 

*/

NONSHARABLE_CLASS(CAknsSrvFileBuffer) : public CBase

    {

    public: // Construction and destruction

        /**

        * Symbian constructor.

        * @param aFilehandle file handle.

        * @return new instance of CAknsSrvFileBuffer.

        */

        static CAknsSrvFileBuffer* NewL( RFile& aFilehandle );

        /**

        * Destructor.

        */

        virtual ~CAknsSrvFileBuffer();

    public: // New methods

        /**

        * Gets 32-bit integer value from file.

        * @param aOffset offset in the file

        * @return 32-bit integer value from file.

        */

        TInt32 GetInt32L( const TUint aOffset );

        /**

        * Gets 16-bit unsigned integer value from file.

        * @param aOffset offset in the file

        * @return 16-bit unsigned integer value from file.

        */

        TUint16 GetUint16L( const TUint aOffset );

        /**

        * Gets 16-bit integer value from file.

        * @param aOffset offset in the file

        * @return 16-bit integer value from file.

        */

        TInt16 GetInt16L( const TUint aOffset );

        /**

        * Gets 8-bit unsigned integer value from file.

        * @param aOffset offset in the file

        * @return 8-bit unsigned integer value from file.

        */

        TUint8 GetUint8L( const TUint aOffset );

    private: // New methods

        /**

        * Makes pointer to buffer.

        */

        const TAny* PtrToBuffer( const TUint aOffset ) const;

        /**

        * Reads buffer from given offset.

        */

        void ReadToBufferL( const TUint aOffset, const TUint aSize );

        /**

        * Fills buffer.

        */

        void FillBufferL();

        /**

        * Checks if offset is within range.

        */

        TBool IsWithin( const TUint aOffset, const TUint aSize ) const;

    private: // Construction and destruction

        /**

        * Symbian 2nd phase constructor.

        */

        void ConstructL(RFile& aFilehandle);

        /**

        * C++ constructor.

        */

        CAknsSrvFileBuffer();

    private: // Data

        ContentAccess::CContent* iContent;

        ContentAccess::CData* iData;

        HBufC8* iBuffer;

        TInt iPosition;

        TInt iLength;

    };

#endif

// End of File