filelogger.cpp

Active Object实现动画

/*
* ==============================================================================
*  Name     : CFileLogger
*  Part of  : AOExample
*  Created  : 3.5.2004 by Markus Pelkonen
*  Implementation notes: See detailed documentation from the file
*                        "FileLogger.h"
*  Version  :
*  Copyright: Nokia
* ==============================================================================
*/

#include <e32base.h>
#include <e32cons.h>
#include <e32std.h>
#include <f32file.h>
#include "FileLogger.h"

// -----------------------------------------------------------------------------
CFileLogger* CFileLogger::NewL(const TDesC &logFileName)
    {
    CFileLogger* result = new (ELeave) CFileLogger();
    CleanupStack::PushL( result );
    result->ConstructL( logFileName );
    CleanupStack::Pop();
    return result;
    }

// -----------------------------------------------------------------------------
void CFileLogger::ConstructL(const TDesC &logFileName)
    {
    int pos = logFileName.LocateReverse( '\\' );
    TPtrC dirName = logFileName.Left( pos+1 );

    User::LeaveIfError(iFsSession.Connect());
    iFsSession.MkDirAll(dirName);

    if( iFile.Open(iFsSession,logFileName,EFileWrite|EFileStreamText)
         == KErrNone )
        {
        // go to the end of the file
        TInt tmp = 0;
        iFile.Seek(ESeekEnd, tmp);
        }
    else
        {
        // file doesn't exist, create a new
        User::LeaveIfError(iFile.Replace(iFsSession,logFileName,
                                         EFileWrite|EFileStreamText));
        }
    _LIT(KOpened, "FileLogger opened.\n");
    iBuf.Copy(KOpened);
    Flush();
    }

// -----------------------------------------------------------------------------
void CFileLogger::Flush()
    {
    TPtrC8 representation( (TUint8*)iBuf.Ptr(), iBuf.Size() );
    iFile.Write( representation );
    iFile.Flush();
    iBuf.SetLength( 0 );
    }

// -----------------------------------------------------------------------------
CFileLogger::~CFileLogger()
    {
    iFile.Close();
    iFsSession.Close();
    }