phonebookui/Phonebook2/Presentation/src/CPbk2AttachmentFile.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 19 Feb 2010 22:40:27 +0200
branchRCL_3
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parent 0 e686773b3f54
permissions -rw-r--r--
Revision: 201003 Kit: 201007
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/*
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* Copyright (c) 2005-2007 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 "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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*        Attachment file handler
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*
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*/
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// INCLUDES
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#include    "CPbk2AttachmentFile.h"
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// System includes
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#include    <e32std.h>
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/// Unnamed namespace for local definitions
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namespace {
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// LOCAL CONSTANTS
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_LIT(KRamDrive, "d:");
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_LIT(KPersistentDrive, "c:");
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_LIT(KTempFilePath, "\\system\\temp\\");
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_LIT(KInvalidFileNameChars, "?*<>/\"|\\:");
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_LIT(KDefaultTempFileName, "TEMP.tmp");
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const TInt KMaxDriveNameLength = 2;
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const TInt KMaxNumberLength = 5;
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const TInt KMaxFileNumber = 99999;
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const TInt KFirstDuplicateNameIndex = 1;
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#ifdef _DEBUG
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enum TPanicCode
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    {
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    EPanicPostCond_Constructor = 1,
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    EPanicPreCond_ConstructL,
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    EPanicPostCond_ConstructL,
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    EPanicPreCond_CreateFileL,
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    EPanicPostCond_CreateFileL
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    };
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void Panic(TPanicCode aReason)
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    {
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    _LIT(KPanicText, "CPbk2AttachmentFile");
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    User::Panic(KPanicText,aReason);
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    }
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#endif // _DEBUG
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} // namespace
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// ================= MEMBER FUNCTIONS =======================
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// --------------------------------------------------------------------------
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// CPbk2AttachmentFile::NewL
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// --------------------------------------------------------------------------
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//
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EXPORT_C CPbk2AttachmentFile* CPbk2AttachmentFile::NewL(
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        const TDesC& aBaseName, 
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        RFs& aRfs, 
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        TUint aFileMode /*= EFileStream|EFileShareExclusive|EFileWrite*/)
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    {
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    CPbk2AttachmentFile* self = 
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        CPbk2AttachmentFile::NewLC( aBaseName, aRfs, aFileMode );
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    CleanupStack::Pop(self);  // self
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    return self;
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    }
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// --------------------------------------------------------------------------
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// CPbk2AttachmentFile::NewLC
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// --------------------------------------------------------------------------
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//
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EXPORT_C CPbk2AttachmentFile* CPbk2AttachmentFile::NewLC(
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        const TDesC& aBaseName, 
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        RFs& aRfs, 
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        TUint aFileMode /*= EFileStream|EFileShareExclusive|EFileWrite*/)
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    {
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    CPbk2AttachmentFile* self = 
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        new(ELeave) CPbk2AttachmentFile( aRfs, aFileMode );
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    CleanupStack::PushL( self );
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    self->ConstructL( aBaseName );
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    return self;
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    }
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// --------------------------------------------------------------------------
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// CPbk2AttachmentFile::~CPbk2AttachmentFile
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// --------------------------------------------------------------------------
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//
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CPbk2AttachmentFile::~CPbk2AttachmentFile()
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    {
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    DeleteFile();
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    delete iFileName;
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    delete iBaseName;
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    }
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// --------------------------------------------------------------------------
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// CPbk2AttachmentFile::FileName
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// --------------------------------------------------------------------------
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//
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EXPORT_C const TDesC& CPbk2AttachmentFile::FileName() const
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    {
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    if ( iFileName )
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        {
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        return *iFileName;
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        }
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    else
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        {
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        return KNullDesC;
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        }
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    }
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// --------------------------------------------------------------------------
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// CPbk2AttachmentFile::File
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// --------------------------------------------------------------------------
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//
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EXPORT_C RFile& CPbk2AttachmentFile::File()
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    {
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    return iFile;
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    }
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// --------------------------------------------------------------------------
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// CPbk2AttachmentFile::Release
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// --------------------------------------------------------------------------
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//
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EXPORT_C void CPbk2AttachmentFile::Release()
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    {
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    iFile.Close();
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    iOwnsFile = EFalse;
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    }
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// --------------------------------------------------------------------------
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// CPbk2AttachmentFile::SwitchDriveL
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// --------------------------------------------------------------------------
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//
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EXPORT_C void CPbk2AttachmentFile::SwitchDriveL()
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    {
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    TPtrC drive;
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    if ( iFileName )
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        {
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        // File already created successfully: switch the drive
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        TParsePtrC fileNameParser( *iFileName );
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        drive.Set( fileNameParser.Drive()==KRamDrive ? KPersistentDrive : KRamDrive );
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        }
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    else
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        {
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        // Default is RAM drive in ConstructL
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        drive.Set( KPersistentDrive );
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        }
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    // Create new file
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    CreateFileL( drive, KTempFilePath, *iBaseName );
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    }
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// --------------------------------------------------------------------------
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// CPbk2AttachmentFile::CPbk2AttachmentFile
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// --------------------------------------------------------------------------
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//
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CPbk2AttachmentFile::CPbk2AttachmentFile(
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        RFs& aRfs, 
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        TUint aFileMode ) :
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    iRfs( aRfs ),
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    iFileMode( aFileMode )
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    {
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    // CBase::operator new will reset members
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    __ASSERT_DEBUG(!iBaseName && !iFileName && iFile.SubSessionHandle()==KNullHandle, 
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        Panic(EPanicPostCond_Constructor) );
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    }
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// --------------------------------------------------------------------------
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// CPbk2AttachmentFile::ConstructL
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// --------------------------------------------------------------------------
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//
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void CPbk2AttachmentFile::ConstructL( const TDesC& aBaseName )
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    {
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    __ASSERT_DEBUG(!iBaseName && !iFileName && 
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                    iFile.SubSessionHandle()==KNullHandle, 
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                        Panic(EPanicPreCond_ConstructL));
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    // Call this to ensure that we create session handle that can be passed 
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    // via IPC. We are sharing RFile handles with SendUi.
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    iRfs.ShareProtected();
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    // Clean up aBaseName
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    const TInt maxLength = 
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        KMaxFileName - 
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        KMaxDriveNameLength - 
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        KTempFilePath().Length() - 
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        KMaxNumberLength;
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    iBaseName = HBufC::NewL( maxLength );
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    TPtr baseName = iBaseName->Des();
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    for ( TInt i=0; i < aBaseName.Length() && i < maxLength; ++i )
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        {
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   201
        TChar ch = aBaseName[i];
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        if ( KInvalidFileNameChars().Locate( ch ) == KErrNotFound )
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            {
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            baseName.Append( ch );
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            }
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        }
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    baseName.TrimAll();
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    if ( baseName.Length() == 0 )
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        {
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        baseName = KDefaultTempFileName;
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   211
        }
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   212
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    // Try to create the file
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    TRAPD( err, CreateFileL( KRamDrive, KTempFilePath, baseName ) );
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    if ( err != KErrNone )
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        {
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        // Try on different drive
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        SwitchDriveL();
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        }
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   220
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    __ASSERT_DEBUG( iBaseName && iFileName, Panic(EPanicPostCond_ConstructL) );
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    }
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// --------------------------------------------------------------------------
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// CPbk2AttachmentFile::CreateFileL
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// --------------------------------------------------------------------------
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//
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void CPbk2AttachmentFile::CreateFileL(
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        const TDesC& aDrive, 
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        const TDesC& aDir, 
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        const TDesC& aBaseName )
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    {
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    __ASSERT_DEBUG(iBaseName && iRfs.Handle()!=KNullHandle, 
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        Panic(EPanicPreCond_CreateFileL));
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    // Create and init a local buffer for the file name
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    HBufC* fileNameBuf = HBufC::NewLC( KMaxFileName );
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    TPtr fileName = fileNameBuf->Des();
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    fileName = aDrive;
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    fileName.Append( aDir );
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    // Create directory
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    TInt error = iRfs.MkDirAll( fileName );
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    if ( error != KErrAlreadyExists )
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        {
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        User::LeaveIfError( error );
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        }
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    fileName.Append( aBaseName );
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    TInt number = KFirstDuplicateNameIndex;
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    FOREVER
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        {
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        RFile file;
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        const TInt error = file.Create( iRfs, fileName, iFileMode );
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        if ( error == KErrNone )
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            {
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            // File created succesfully: switch state
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            DeleteFile();  // Delete previous file
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            iFile = file;
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            delete iFileName;
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            iFileName = fileNameBuf;
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            iOwnsFile = ETrue;
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            CleanupStack::Pop();  // fileNameBuf
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            __ASSERT_DEBUG(iFileName && iFile.SubSessionHandle()!=KNullHandle, 
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                Panic(EPanicPostCond_CreateFileL));
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            return;
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            }
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        else if ( error != KErrAlreadyExists )
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            {
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            User::Leave( error );
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            }
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        // File name was reserved: append number to basename to make it unique
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        fileName = aDrive;
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        fileName.Append( aDir );
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        TParsePtrC baseNameParser( aBaseName );
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        fileName.Append( baseNameParser.Name() );
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        fileName.AppendNum( number );
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        fileName.Append( baseNameParser.Ext() );
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        if ( ++number > KMaxFileNumber )
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            {
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            User::Leave( KErrTooBig );
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            }
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        }
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    }
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// --------------------------------------------------------------------------
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// CPbk2AttachmentFile::DeleteFile
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// --------------------------------------------------------------------------
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//
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void CPbk2AttachmentFile::DeleteFile()
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    {
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    iFile.Close();
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    if ( iFileName && iOwnsFile )
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        {
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        // Delete the file. If the deletion fails for some reason trust that the
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        // system will delete the file when it cleans up temp file directories.
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        iRfs.Delete( *iFileName );
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        }
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    }
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// --------------------------------------------------------------------------
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// CPbk2AttachmentFileArray::CPbk2AttachmentFileArray
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// --------------------------------------------------------------------------
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//
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EXPORT_C CPbk2AttachmentFileArray::CPbk2AttachmentFileArray( TInt aGranularity )
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    : CArrayPtrFlat<CPbk2AttachmentFile>( aGranularity )
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    {
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    }
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// --------------------------------------------------------------------------
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// CPbk2AttachmentFileArray::~CPbk2AttachmentFileArray
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// --------------------------------------------------------------------------
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//
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CPbk2AttachmentFileArray::~CPbk2AttachmentFileArray()
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    {
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    // Delete all objects in the array
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    ResetAndDestroy();
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    }
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// --------------------------------------------------------------------------
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// CPbk2AttachmentFileArray::MdcaCount
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// --------------------------------------------------------------------------
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//
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TInt CPbk2AttachmentFileArray::MdcaCount() const
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    {
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    return Count();
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    }
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// --------------------------------------------------------------------------
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// CPbk2AttachmentFileArray::MdcaPoint
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// --------------------------------------------------------------------------
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//
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TPtrC CPbk2AttachmentFileArray::MdcaPoint( TInt aIndex ) const
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    {
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    return At( aIndex )->FileName();
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    }
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   337
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// --------------------------------------------------------------------------
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// CPbk2AttachmentFileArray::FileHandleAt
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// --------------------------------------------------------------------------
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//    
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RFile& CPbk2AttachmentFileArray::FileHandleAt( TInt aIndex )
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    {
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    return At( aIndex )->File();
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    }
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// End of File