/*
* Copyright (c) 2005 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: TMMCScBkupDriveFilter implementation
*
*
*/
#include "TMMCScBkupDriveFilter.h"
// Constants
const TInt KMMCScBkupInitialDriveIndex = -1;
// ========================= MEMBER FUNCTIONS ================================
// ---------------------------------------------------------------------------
// TMMCScBkupDriveFilter::Reset()
//
//
// ---------------------------------------------------------------------------
void TMMCScBkupDriveFilter::Reset()
{
iCurrentDrive = KMMCScBkupInitialDriveIndex;
}
// ---------------------------------------------------------------------------
// TMMCScBkupDriveFilter::SetPrimaryDriveFilter()
//
//
// ---------------------------------------------------------------------------
void TMMCScBkupDriveFilter::SetPrimaryDriveFilter( const TDriveList& aDriveList )
{
iPrimaryDriveList = aDriveList;
}
// ---------------------------------------------------------------------------
// TMMCScBkupDriveFilter::SetSecondaryDriveFilter()
//
//
// ---------------------------------------------------------------------------
void TMMCScBkupDriveFilter::SetSecondaryDriveFilter( const TDriveList& aDriveList )
{
iSecondaryDriveList = aDriveList;
iHaveSecondaryList = ETrue;
}
// ---------------------------------------------------------------------------
// TMMCScBkupDriveFilter::NextValidDrive()
//
//
// ---------------------------------------------------------------------------
TBool TMMCScBkupDriveFilter::NextValidDrive( TDriveNumber& aDrive )
{
// Always move to the next drive before checking its availability.
// FindValidDrive takes care of ensuring the value falls within A-Z
// range.
++iCurrentDrive;
// Do we have an available primary drive?
TBool driveAvailable = EFalse;
while( iCurrentDrive >= EDriveA && iCurrentDrive <= EDriveZ )
{
TDriveNumber drive;
driveAvailable = FindValidDrive( iPrimaryDriveList, drive );
if ( driveAvailable && iHaveSecondaryList )
{
// Verify against secondary drive list also...
const TBool makeOnlyOneDirectAttempt = ETrue;
driveAvailable = FindValidDrive( iSecondaryDriveList, drive, makeOnlyOneDirectAttempt );
}
else if (!driveAvailable)
{
// No more primary drives left, so we're done here.
break;
}
// Did we find a match on (just) the primary drive, or then
// the primary and secondary drive lists combined?
if (driveAvailable)
{
// Yes, match found - we're finished here.
aDrive = drive;
break;
}
else
{
// Try to search for the next drive that matches both the
// primary and secondary lists (if supported)
++iCurrentDrive;
}
}
//
return driveAvailable;
}
// ---------------------------------------------------------------------------
// TMMCScBkupDriveFilter::CurrentDrive()
//
//
// ---------------------------------------------------------------------------
TDriveNumber TMMCScBkupDriveFilter::CurrentDrive() const
{
return static_cast< TDriveNumber >( iCurrentDrive );
}
// ---------------------------------------------------------------------------
// TMMCScBkupDriveFilter::FindValidDrive()
//
//
// ---------------------------------------------------------------------------
TBool TMMCScBkupDriveFilter::FindValidDrive( const TDriveList& aList, TDriveNumber& aDrive, TBool aOneAttemptOnly )
{
// If we've already reached Z then there isn't any sense in continuing
// as all drives have been processed.
TBool driveAvailable = EFalse;
// Keep checking drives until we go past Z
while( iCurrentDrive >= EDriveA && iCurrentDrive <= EDriveZ )
{
if ( aList[ iCurrentDrive ] != 0 )
{
// Found an available drive
aDrive = static_cast< TDriveNumber >( iCurrentDrive );
driveAvailable = ETrue;
break;
}
else if ( aOneAttemptOnly )
{
break;
}
// Try next drive
++iCurrentDrive;
}
//
return driveAvailable;
}