--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/emailservices/emaildebug/src/cmaillogger.cpp	Thu Dec 17 08:39:21 2009 +0200
@@ -0,0 +1,200 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  commonemail file logger implementation
+*
+*/
+
+#include "cmaillogger.h"
+#include <e32std.h>
+
+_LIT( KLogFileExt, ".txt" );
+_LIT( KLogFileBaseName, "c:\\data\\cmail_" );
+
+// log file is replaced after certain amount of rows
+const TInt KLogFileMaxRowCount = 3000;
+
+#ifdef _DEBUG
+#define CMAILLOGGERTACE(x) {RDebug::Print(_L(x) );}
+#define CMAILLOGGERTACE2(x,y) {RDebug::Print(_L(x),y );}
+#else
+#define CMAILLOGGERTACE(x)
+#define CMAILLOGGERTACE2(x,y)
+#endif
+
+// local functions
+RFileWriteStream* File();
+
+void ReplaceIfSizeExceeded(LogFile& aLogFile );
+
+// ---------------------------------------------------------------------------
+// Exception handler that closes and renames current log file and passes
+// exception to original handler.
+// ---------------------------------------------------------------------------
+void LoggerExcHandler( TExcType aType )
+    {
+    CMAILLOGGERTACE2( "cmail exception handler %d", aType )
+    LogFile* logFile = reinterpret_cast<LogFile*>( Dll::Tls() );
+    TExceptionHandler storedExcHandler = NULL;
+    if ( logFile )
+        {
+        _LIT8( KExceptionText, "CMAIL catched exception %d \n" );
+        TBuf8<50> buf8;
+        buf8.Format( KExceptionText(), aType );
+        TRAP_IGNORE( logFile->iFile.WriteL( buf8 ) );
+        logFile->iFile.Close();
+
+        // rename file to prevent over writing
+        TBuf<100> newName;
+        TTime time;
+        time.HomeTime();
+        TDateTime dt = time.DateTime();
+        TInt pos = logFile->iFileName.Locate(TChar('.'));
+        if ( pos != KErrNotFound )
+            {
+            _LIT( KDateTimeFormat, "%C" ); // microsecond form
+            TBuf<20> timeBuf;
+            TRAP_IGNORE( time.FormatL( timeBuf, KDateTimeFormat() ) )
+            newName = logFile->iFileName.Left( pos );
+            newName.Append( timeBuf );
+            newName.Append( KLogFileExt() );
+            TInt err = logFile->iFs.Rename( logFile->iFileName, newName);
+            CMAILLOGGERTACE2( "CMAIL log file rename err=%d", err )
+            }
+
+        storedExcHandler = logFile->iHandler;
+        (*storedExcHandler)(aType);
+        }
+
+    }
+
+// ---------------------------------------------------------------------------
+// CmailLogger::Write
+// ---------------------------------------------------------------------------
+//
+EXPORT_C void CmailLogger::Write( const TDesC8& aData )
+{
+    RFileWriteStream* file = File();
+    if ( file /*&& file->SubSessionHandle() */)
+        {
+        TRAP_IGNORE( 
+            {
+            file->WriteL( aData );
+            TBuf8<2> crLf;
+            crLf.Append( 13 );
+            crLf.Append( 10 );
+            file->WriteL( crLf ); 
+            } );            
+        }
+}
+
+// ---------------------------------------------------------------------------
+// CmailLogger::Close
+// ---------------------------------------------------------------------------
+//
+EXPORT_C void CmailLogger::Close()
+{
+    CMAILLOGGERTACE("Cmaillogger Close")
+    TAny* tls = Dll::Tls();
+    if ( tls )
+        {
+        LogFile* logFile = reinterpret_cast<LogFile*>( tls );
+        logFile->iFile.Close();
+        logFile->iFs.Close();
+        logFile->iFileName.Zero();
+        User::SetExceptionHandler( logFile->iHandler,0xFFFFFFFF );
+        delete logFile;
+        Dll::SetTls( NULL );
+        }
+}
+
+// ---------------------------------------------------------------------------
+// Returns log file pointer. When called first time file handle container
+// LogFile is stored to TLS.
+// ---------------------------------------------------------------------------
+//
+RFileWriteStream* File()
+    {
+    CMAILLOGGERTACE("Cmaillogger File")
+    TAny* tls = Dll::Tls();
+    LogFile* logFile = NULL;
+    if ( !tls )
+        {
+        CMAILLOGGERTACE("Cmaillogger File no tls")
+        RThread t;
+        TName n = t.Name();
+        logFile = new LogFile;
+        if ( !logFile )
+            {
+            return NULL;
+            }
+        Dll::SetTls( logFile );
+        logFile->iThreadName.Copy( t.Name().Left(20));
+        logFile->iLinesWritten = KErrNotFound; // for ReplaceIfSizeExceeded()
+        TInt res = logFile->iFs.Connect();
+        CMAILLOGGERTACE2("Cmaillogger iFs.Connect res=%d", res )
+        ReplaceIfSizeExceeded( *logFile );
+
+        // store default exception handler pointer
+        logFile->iHandler = User::ExceptionHandler();
+
+        // set own exception handler (see above)
+        User::SetExceptionHandler( LoggerExcHandler,
+            KExceptionAbort |
+            KExceptionAbort |
+            KExceptionUserInterrupt |
+            KExceptionFault );
+        }
+    else
+        {
+        logFile = reinterpret_cast<LogFile*>( tls );
+        ReplaceIfSizeExceeded( *logFile );
+        logFile->iLinesWritten++;
+        if ( logFile->iLinesWritten % 100 == 0 )
+            { // flush every now and then to prevent loss of data if thread
+              // is paniced (exceptions like ke-3 are not a problem, they are
+              // catched by LoggerExcHandler).
+            TRAP_IGNORE( logFile->iFile.CommitL() )
+            }
+        }
+    return &logFile->iFile;
+    }
+
+// ---------------------------------------------------------------------------
+// ReplaceIfSizeExceeded
+// Replaces log file if determined log row count is exceeded.
+// ---------------------------------------------------------------------------
+//
+void ReplaceIfSizeExceeded( LogFile& aLogFile )
+    {
+    CMAILLOGGERTACE("Cmaillogger ReplaceIfSizeExceeded<")
+    if ( ( aLogFile.iLinesWritten >= KLogFileMaxRowCount ||
+         aLogFile.iLinesWritten < 0 ) && // initial creation
+         aLogFile.iFs.Handle() )
+        {
+        if ( !aLogFile.iFileName.Length() )
+            {
+            aLogFile.iFileName = KLogFileBaseName();
+            aLogFile.iFileName.Append( aLogFile.iThreadName );
+            aLogFile.iFileName.Append( KLogFileExt() );
+            }
+        aLogFile.iLinesWritten = 0;
+        aLogFile.iFile.Close();
+        CMAILLOGGERTACE2("Cmaillogger  open file '%S'",&aLogFile.iFileName)
+        TInt res = aLogFile.iFile.Replace( aLogFile.iFs, aLogFile.iFileName,
+            EFileShareReadersOrWriters );
+        CMAILLOGGERTACE2("Cmaillogger open result=%d", res )
+        }
+    CMAILLOGGERTACE("Cmaillogger ReplaceIfSizeExceeded>")
+    }
+