/*

* Copyright (c) 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:  State, while waiting for requests

*

*/

#ifndef CEP0READER_H

#define CEP0READER_H

#include "cusbdevcon.h"

class CStateMachine;    // gets notifications on events happened on EP0

/**

 *  EP0 Reader

 *

 *  @lib usbdevcon.lib

 *  @since S60 v.5.0 

 */

class CEP0Reader : public CActive 

    {

public:

    /**

     * Two-phased constructor.

     *

     * @since S60 v.5.0

     * @param aObserver Gets notification when Read request is completed

     * @param aLdd Link to services for reading EP0

     * @return Constructed instance

     */

    static CEP0Reader* NewL(CStateMachine& aObserver, RDevUsbcClient& aLdd);

    /**

    * Destructor.

    *

    * @since S60 v.5.0

    */

    virtual ~CEP0Reader();

    /**

     * Set request to read setup packet

     *

     * @since S60 v.5.0

     */

    void ReadSetupPacket();

    /**

     * Set request to read EP0 data

     *

     * @since S60 v.5.0

     * @param aDataLength Max length of data to read

     */

    void Read(TUint aDataLength);

private:

    /**

     * Default construction

     *

     * @since S60 v.5.0

     * @param aObserver Gets notification when Read request is completed

     * @param aLdd Link to services for reading EP0

     */

    CEP0Reader(CStateMachine& aObserver, RDevUsbcClient& aLdd);

    /**

     * Two-phased construction.

     *

     */

    void ConstructL();

    // from CActive

    /**

     * From CActive.

     *

     */

    void RunL();

    /**

     * From CActive.

     *

     */ 

    void DoCancel();

    /**

     * From CActive.

     *

     */ 

     TInt RunError( TInt /*aError*/ );

private: // data

    /**

     * LDD Logical Device Driver

     * Not own.  

     */

    RDevUsbcClient& iLdd;

    /**

     * State machine gets read data

     * Not own.  

     */

    CStateMachine& iObserver;

    /**

     * Read buffer

     */

    RBuf8 iBuffer;

    };

#endif // CEP0READER_H