--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/filemanager/bkupengine/src/TMMCScBkupDriveFilter.cpp	Wed Sep 01 12:31:07 2010 +0100
@@ -0,0 +1,158 @@
+/*
+* 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;
+    }
+
+
+
+