kernel/eka/drivers/medmmc/toc.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Wed, 18 Aug 2010 11:08:29 +0300
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permissions -rw-r--r--
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// Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of the License "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// TOC Partition Management for Embedded MMC devices
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// 
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//
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#include "toc.h"
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/*
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 * Search entry in TOC with aName as part of ItemName.
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 */
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TInt Toc::GetItemByName(const TText8* aName, STocItem& aItem)
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    {
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    if ( aName == NULL )
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        {
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        return KErrNotFound;
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        }
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	// calculate length for name to be searched
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    TUint nameLen = 0;
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    for (; nameLen < KMaxItemNameLen && aName[nameLen] != 0; nameLen++) {};
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	if ( !nameLen ) 
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	    return KErrGeneral; // zero length or Blank Name
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	// check all items in TOC	 
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	for (TUint i=0; i < KMaxNbrOfTocItems && iTOC[i].iStart != KEndOfToc; i++)
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		{	
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		// calculate length of current item 
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        TUint fileNameLen = 0;
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		for (; fileNameLen < KMaxItemNameLen && iTOC[i].iFileName[fileNameLen] != 0; fileNameLen++) {};
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		if ( fileNameLen < nameLen ) 
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		    continue;  // file name too short
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		// compare Item with aName
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		for (TUint k = 0; k <= (fileNameLen - nameLen); k++ )				
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			{
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            TUint l=0;
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            for (; l < nameLen; l++ )
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                {
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                if ( aName[l] != iTOC[i].iFileName[k+l] ) 
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                    break;
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                }
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            if ( l == nameLen )
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                {
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                // item found
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                aItem = iTOC[i];
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                aItem.iStart += (iTocStartSector << KSectorShift);
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                return KErrNone;
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                }
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			}		
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		}
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	return KErrNotFound;
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    }
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//  End of File