/*

* 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:  Inline utility methods for flag variables

*

*/

#ifndef CAM_FLAGUTILITY_INL

#define CAM_FLAGUTILITY_INL

// ===========================================================================

namespace NCamCameraController

  {

  inline TBool IsFlagOn( TUint aState, TUint aFlag )

    {

    return (aState & aFlag);

    };

  inline TBool IsFlagOff( TUint aState, TUint aFlag )

    {

    return !IsFlagOn( aState, aFlag );

    };

  inline void CheckFlagOnL( TUint aState, TUint aFlag, TInt aLeave )

    {

    if( IsFlagOff( aState, aFlag ) )

      {

      User::Leave( aLeave );

      }

    }

  inline void CheckFlagOffL( TUint aState, TUint aFlag, TInt aLeave )

    {

    if( IsFlagOn( aState , aFlag ) )

      {

      User::Leave( aLeave );

      }

    }

  inline void CheckEqualsL( TUint aState, TUint aCheck, TInt aLeave )

    {

    if( aState != aCheck )

      {

      User::Leave( aLeave );

      }

    }

  // SetFlags and ClearFlags defined to aid readability.

  // "ClearFlags( flags, someflags )" should be more readable than "flags &= ~someFlags".

  // Also using these methods is less error prone. 

  // Consider "flags &= ~someFlags" changed to "flags &= someFlags" by mistake..

  inline void SetFlags( TUint& aOldFlags, TUint aSetFlags )

    {

    aOldFlags |= aSetFlags;

    }

  inline void ClearFlags( TUint& aOldFlags, TUint aClearFlags )

    {

    aOldFlags &= ~aClearFlags;

    }

  }

// ===========================================================================

#endif // CAM_FLAGUTILITY_INL

// end of file