userlibandfileserver/fileserver/sfsrv/cl_entry.cpp
author John Imhofe
Mon, 19 Oct 2009 15:55:17 +0100
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Convert Kernelhwsrv package from SFL to EPL kernel\eka\compsupp is subject to the ARM EABI LICENSE userlibandfileserver\fatfilenameconversionplugins\unicodeTables is subject to the Unicode license kernel\eka\kernel\zlib is subject to the zlib license
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// Copyright (c) 1995-2009 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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// f32\sfsrv\cl_entry.cpp
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// 
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//
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#include "cl_std.h"
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/**
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Default constructor.
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*/
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EXPORT_C TVolumeInfo::TVolumeInfo()
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	{
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    Mem::FillZ(this, sizeof(TVolumeInfo)); //-- zero-fill itself
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    new(&iName)TBufC<KMaxFileName>;        //-- initialise broken descriptor 
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    }
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EXPORT_C TBool TEntry::IsReadOnly() const
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/**
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Tests whether the file or directory is read-only.
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@return ETrue if entry is read-only, EFalse if not.
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@see KEntryAttReadOnly
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*/
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	{
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	return(iAtt&KEntryAttReadOnly);
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	}
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EXPORT_C TBool TEntry::IsHidden() const
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/**
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Tests whether the file or directory is hidden.
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@return ETrue if entry is hidden, EFalse if not.
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@see KEntryAttHidden
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*/
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	{
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	return(iAtt&KEntryAttHidden);
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	}
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EXPORT_C TBool TEntry::IsSystem() const
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/**
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Tests whether the file or directory has the system attribute set.
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@return ETrue if entry is a system entry, EFalse if not.
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@see KEntryAttSystem
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*/
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	{
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	return(iAtt&KEntryAttSystem);
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	}
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EXPORT_C TBool TEntry::IsDir() const
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/**
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Tests whether the entry is a directory.
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@return ETrue if entry indicates a directory, EFalse if not.
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@see KEntryAttDir
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*/
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	{
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	return(iAtt&KEntryAttDir);
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	}
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EXPORT_C TBool TEntry::IsArchive() const
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/**
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Tests whether the file is an archive file.
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@return ETrue if file is archive, EFalse if not.
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@see KEntryAttArchive
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*/
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	{
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	return(iAtt&KEntryAttArchive);
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	}
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EXPORT_C TEntryArray::TEntryArray()
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	: iCount(0)
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/**
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Default constructor.
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Initialises its count of contained TEntry objects to zero.
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*/
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	{}
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EXPORT_C TInt TEntryArray::Count() const
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/**
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Gets the number of entries in the array.
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@return The number of entries in the array.
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*/
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	{
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	if (iCount==KCountNeeded)
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		{
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		const TEntry* pE=(const TEntry*)iBuf.Ptr();
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		const TEntry* pEnd=PtrAdd(pE,iBuf.Length());
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		TInt c=0;
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		while (pE<pEnd)
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			{
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			c++;
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			pE=PtrAdd(pE,EntrySize(*pE, ETrue));
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			}
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		TEntryArray& me=(TEntryArray& )(*this);
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		me.iCount=c;
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		me.iIndex=0;
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		me.iPos=(const TEntry*)iBuf.Ptr();
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		}
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	return(iCount);
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	}
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EXPORT_C const TEntry& TEntryArray::operator[](TInt anIndex) const
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/**
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Gets the directory entry at the specified index.
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@param anIndex Index of the entry within the array.
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               This value is relative to zero.
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@return On return contains the entry at the specified index.
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@panic FSCLIENT 22 if anIndex is greater than or equal to the number
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       of elements in the array.
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*/
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	{
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	__ASSERT_ALWAYS(anIndex<Count(),Panic(EEntryArrayBadIndex));
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	const TEntry* pE=iPos;
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	TInt ix=iIndex;
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	if (anIndex<ix)
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		{
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		ix=0;
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		pE=(const TEntry*)iBuf.Ptr();
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		}
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	while (ix<anIndex)
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		{
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		pE=PtrAdd(pE,EntrySize(*pE, ETrue));
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		ix++;
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		}
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	TEntryArray& me=(TEntryArray& )(*this);
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	me.iIndex=ix;
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	me.iPos=pE;
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	return(*pE);
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	}
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EXPORT_C TEntry::TEntry()
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/**
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Default constructor.
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*/
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 : iSizeHigh(0),
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   iReserved(0)
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	{}
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EXPORT_C TEntry::TEntry(const TEntry& aEntry)
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/**
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Copy constructor.
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@param aEntry The TEntry object to be copied.
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*/
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	{
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	Copy(aEntry);
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	Unpack();		// Check that unpacking is safe here - we need to verify that wherever
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					// the entry is copied back into a TEntryArray that the iSizeHigh and
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					// iReserved members are re-packaged and the attribute set accordingly.
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					// (for example, CDir::Sort might do this, but I haven't checked - I know
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					//  this uses the assignment operator, which is why that doesn't unpack...)
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	}
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EXPORT_C TEntry& TEntry::operator=(const TEntry& aEntry)
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/**
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Assignment operator.
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@param aEntry The TEntry object to be copied to this TEntry object.
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@return A reference to this TEntry object.
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*/
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	{
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	if(this!=&aEntry)
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		{
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		Copy(aEntry);
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		Unpack();
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		}
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	return(*this);
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	}
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/**
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@internalTechnology
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@prototype
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*/
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inline void TEntry::Unpack()
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	{
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	if(iAtt & KEntryAttPacked)
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		{
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		/**
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		 * This entry is still in a packed form, so unpack it now by copying high length 
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		 * and reserved bytes from the packed source to the to the unpacked target entry
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		 */
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		TUint32* pSizeHighSrc = PtrAdd((TUint32*)this, EntrySize(*this, EFalse));
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		iSizeHigh = *pSizeHighSrc++;	// Copy iSizeHigh
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		iReserved = *pSizeHighSrc;		// Copy iReserved
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		iAtt &= ~KEntryAttPacked;
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		}
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	}
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/**
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@internalTechnology
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@prototype
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*/
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inline void TEntry::Copy(const TEntry& aEntry)
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	{
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	Mem::Copy(this,&aEntry,EntrySize(aEntry, ETrue));
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	if(!(iAtt & KEntryAttPacked))
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		{
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		iSizeHigh = aEntry.iSizeHigh;
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		iReserved = aEntry.iReserved;
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		}
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	}
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#ifndef SYMBIAN_ENABLE_64_BIT_FILE_SERVER_API
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/**
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@internalTechnology
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@prototype
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*/
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#else
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/**
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Returns the file size in 64 bits.
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This can be used to find the size of a file whose size is more than 2 GB - 1.
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@return The file size in 64 bits
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@publishedAll
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@prototype
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@see TEntry::iSize
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*/
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#endif
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EXPORT_C TInt64 TEntry::FileSize() const
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	{
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#ifndef SYMBIAN_ENABLE_64_BIT_FILE_SERVER_API
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	Panic(ENotImplemented);
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	return (KErrNotSupported);	// To suppress warning!
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#else
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	if(iAtt & KEntryAttPacked)
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		{
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		/**
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		 * This entry is still in a packed form, so unpack it now by copying high length 
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		 * and reserved bytes from the packed source to the to the unpacked target entry
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		 */
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		TUint32* pSizeHighSrc = PtrAdd((TUint32*)this, Align4(EntrySize(*this, EFalse)));
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		return MAKE_TINT64(*pSizeHighSrc, iSize);
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		}
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	return MAKE_TINT64(iSizeHigh, iSize);
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#endif
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	}