emailcontacts/contactactionservice/sendplugin/src/cfscattachmentfile.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 00:02:40 +0200
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Revision: 201003 Kit: 201005
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/*
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* Copyright (c) 2008 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: This file implements classes CFscAttachmentFile, CFscAttachmentFileArray. 
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*
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*/
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// INCLUDES
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#include "emailtrace.h"
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#include  <e32std.h>
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#include "cfscattachmentfile.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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#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, "CFscAttachmentFile");
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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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CFscAttachmentFile* CFscAttachmentFile::NewL(
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    const TDesC& aBaseName, 
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    RFs& aRfs, 
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    TUint aFileMode )
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    {
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    FUNC_LOG;
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    CFscAttachmentFile* self = 
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        CFscAttachmentFile::NewLC(aBaseName, aRfs, aFileMode);
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    CleanupStack::Pop( self );
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    return self;
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    }
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CFscAttachmentFile* CFscAttachmentFile::NewLC( 
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    const TDesC& aBaseName, 
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    RFs& aRfs, 
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    TUint aFileMode )
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    {
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    FUNC_LOG;
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    CFscAttachmentFile* self = new(ELeave) CFscAttachmentFile;
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    CleanupStack::PushL(self);
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    self->iRfs = aRfs;
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    self->iFileMode = aFileMode;
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    self->ConstructL(aBaseName);
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    return self;
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    }
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CFscAttachmentFile::~CFscAttachmentFile()
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    {
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    FUNC_LOG;
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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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const TDesC& CFscAttachmentFile::FileName() const
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    {
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    FUNC_LOG;
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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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RFile& CFscAttachmentFile::File()
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    {
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    FUNC_LOG;
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    return iFile;
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    }
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void CFscAttachmentFile::Release()
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    {
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    FUNC_LOG;
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    iFile.Close();
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    iOwnsFile = EFalse;
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   117
    }
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   118
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   119
void CFscAttachmentFile::SwitchDriveL()
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    {
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    FUNC_LOG;
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    TPtrC drive;
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   123
    if (iFileName)
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        {
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        // File already created successfully: switch the drive
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   126
        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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   131
        // Default is RAM drive in ConstructL
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        drive.Set(KPersistentDrive);
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   133
        }
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   134
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   135
    // Create new file
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    CreateFileL(drive, KTempFilePath, *iBaseName);
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   137
    }
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   138
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   139
CFscAttachmentFile::CFscAttachmentFile()
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    {
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   141
    FUNC_LOG;
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   142
    // CBase::operator new will reset members
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   143
    __ASSERT_DEBUG(!iBaseName && !iFileName && iFile.SubSessionHandle()==KNullHandle, 
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        Panic(EPanicPostCond_Constructor));
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   145
    }
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   146
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   147
void CFscAttachmentFile::ConstructL(const TDesC& aBaseName)
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   148
    {
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   149
    FUNC_LOG;
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   150
    __ASSERT_DEBUG(!iBaseName && !iFileName && iFile.SubSessionHandle()==KNullHandle, 
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   151
        Panic(EPanicPreCond_ConstructL));
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   152
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   153
    // Clean up aBaseName
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   154
    const TInt maxLength = KMaxFileName - KMaxDriveNameLength - KTempFilePath().Length() - KMaxNumberLength;
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   155
    iBaseName = HBufC::NewL(maxLength);
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   156
    TPtr baseName = iBaseName->Des();
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   157
    for (TInt i=0; i < aBaseName.Length() && i < maxLength; ++i)
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   158
        {
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   159
        TChar ch = aBaseName[i];
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   160
        if (KInvalidFileNameChars().Locate(ch) == KErrNotFound)
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parents:
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   161
            {
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   162
            baseName.Append(ch);
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   163
            }
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   164
        }
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   165
    baseName.TrimAll();
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   166
    if (baseName.Length() == 0)
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   167
        {
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   168
        baseName = KDefaultTempFileName;
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diff changeset
   169
        }
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parents:
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   170
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   171
    // Try to create the file
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   172
    TRAPD(err, CreateFileL(KRamDrive, KTempFilePath, baseName));
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   173
    if (err != KErrNone)
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parents:
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   174
        {
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   175
        // Try on different drive
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   176
        SwitchDriveL();
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   177
        }
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parents:
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   178
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   179
    __ASSERT_DEBUG(iBaseName && iFileName, Panic(EPanicPostCond_ConstructL));
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   180
    }
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   181
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parents:
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   182
void CFscAttachmentFile::CreateFileL
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   183
        (const TDesC& aDrive, const TDesC& aDir, const TDesC& aBaseName)
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   184
    {
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diff changeset
   185
    FUNC_LOG;
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parents:
diff changeset
   186
    __ASSERT_DEBUG(iBaseName && iRfs.Handle() != KNullHandle, 
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parents:
diff changeset
   187
        Panic( EPanicPreCond_CreateFileL ));
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parents:
diff changeset
   188
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   189
    // Create and init a local buffer for the file name
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diff changeset
   190
    HBufC* fileNameBuf = HBufC::NewLC( KMaxFileName );
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parents:
diff changeset
   191
    TPtr fileName = fileNameBuf->Des();
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   192
    fileName = aDrive;
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parents:
diff changeset
   193
    fileName.Append( aDir );
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parents:
diff changeset
   194
    // Create directory
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diff changeset
   195
    TInt error = iRfs.MkDirAll( fileName );
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parents:
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   196
    if ( error != KErrNone && error != KErrAlreadyExists )
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   197
        {
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diff changeset
   198
        User::Leave( error );
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diff changeset
   199
        }
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   200
    fileName.Append( aBaseName );
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parents:
diff changeset
   201
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   202
    TInt number = 0;
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parents:
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   203
    FOREVER
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parents:
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   204
        {
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   205
        RFile file;
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parents:
diff changeset
   206
        const TInt error = file.Create( iRfs, fileName, iFileMode );
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parents:
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   207
        
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diff changeset
   208
        TParsePtrC parsePtr( fileName );
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parents:
diff changeset
   209
                
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   210
        if ( error == KErrNone && parsePtr.Name().Length() > 0 )
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parents:
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   211
            {
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diff changeset
   212
            // File created succesfully: switch state
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parents:
diff changeset
   213
            DeleteFile();  // Delete previous file
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parents:
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   214
            iFile = file;
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parents:
diff changeset
   215
            delete iFileName;
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parents:
diff changeset
   216
            iFileName = fileNameBuf;
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parents:
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   217
            iOwnsFile = ETrue;
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parents:
diff changeset
   218
            CleanupStack::Pop();  // fileNameBuf
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parents:
diff changeset
   219
            __ASSERT_DEBUG( iFileName && iFile.SubSessionHandle() != 
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parents:
diff changeset
   220
                            KNullHandle, 
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parents:
diff changeset
   221
                            Panic( EPanicPostCond_CreateFileL ) );
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parents:
diff changeset
   222
            return;
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parents:
diff changeset
   223
            }
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parents:
diff changeset
   224
        else if ( error != KErrAlreadyExists && error != KErrNone )
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parents:
diff changeset
   225
            {
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parents:
diff changeset
   226
            User::Leave( error );
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parents:
diff changeset
   227
            }
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parents:
diff changeset
   228
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parents:
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   229
        // File name was reserved: append number to basename to make it unique
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parents:
diff changeset
   230
        fileName = aDrive;
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parents:
diff changeset
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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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void CFscAttachmentFile::DeleteFile()
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    {
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    FUNC_LOG;
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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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CFscAttachmentFileArray::CFscAttachmentFileArray(TInt aGranularity)
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    : CArrayPtrFlat<CFscAttachmentFile>(aGranularity)
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    {
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    FUNC_LOG;
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    }
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CFscAttachmentFileArray::~CFscAttachmentFileArray()
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    {
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    FUNC_LOG;
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    // Delete all objects in the array
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    ResetAndDestroy();
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    }
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TInt CFscAttachmentFileArray::MdcaCount() const
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    {
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    FUNC_LOG;
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    return Count();
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    }
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TPtrC CFscAttachmentFileArray::MdcaPoint(TInt aIndex) const
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    {
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    FUNC_LOG;
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    return At(aIndex)->FileName();
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    }
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// End of File
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