1 /*

     2 * Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). 

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Inline utility methods for flag variables

    15 *

    16 */

    17 

    18 

    19 #ifndef CAM_FLAGUTILITY_INL

    20 #define CAM_FLAGUTILITY_INL

    21 

    22 

    23 // ===========================================================================

    24 namespace NCamCameraController

    25   {

    26   inline TBool IsFlagOn( TUint aState, TUint aFlag )

    27     {

    28     return (aState & aFlag);

    29     };

    30 

    31   inline TBool IsFlagOff( TUint aState, TUint aFlag )

    32     {

    33     return !IsFlagOn( aState, aFlag );

    34     };

    35 

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

    37     {

    38     if( IsFlagOff( aState, aFlag ) )

    39       {

    40       User::Leave( aLeave );

    41       }

    42     }

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

    44     {

    45     if( IsFlagOn( aState , aFlag ) )

    46       {

    47       User::Leave( aLeave );

    48       }

    49     }

    50 

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

    52     {

    53     if( aState != aCheck )

    54       {

    55       User::Leave( aLeave );

    56       }

    57     }

    58   

    59   // SetFlags and ClearFlags defined to aid readability.

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

    61   // Also using these methods is less error prone. 

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

    63   inline void SetFlags( TUint& aOldFlags, TUint aSetFlags )

    64     {

    65     aOldFlags |= aSetFlags;

    66     }

    67   

    68   inline void ClearFlags( TUint& aOldFlags, TUint aClearFlags )

    69     {

    70     aOldFlags &= ~aClearFlags;

    71     }

    72   }

    73 

    74 // ===========================================================================

    75 #endif // CAM_FLAGUTILITY_INL

    76 

    77 // end of file