/*

* Copyright (c) 2006 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:  Handles log writing.

*

*/

#ifndef C_STREAMLOGGER_H

#define C_STREAMLOGGER_H

#include <f32file.h>  // link against efsrv.lib

#include <eikenv.h>

#define CERR    StreamLogger::begin()

/**

 * usage: StreamLogger::begin()<<"your string"<<yourNumber<<...<<end;

 */

class StreamLogger

    {

    //

    // internel class

    // use RAII instead of symbian 2 phases contruction.

    //

    class LogFile{

    public:

        LogFile()

            {

            _LIT( KLogFile, "c:\\debug.log" );

            RFs& fs = CEikonEnv::Static()->FsSession();

            if ( file.Open( fs, KLogFile, EFileWrite | EFileShareAny ) 

                != KErrNone )

                file.Create( fs, KLogFile, EFileWrite | EFileShareAny );

            TInt pos=0;  // this must be 0

            file.Seek( ESeekEnd, pos );

            }

        ~LogFile()

            {

            file.Close();

            }

        RFile& operator()(){ return file; }

    private:

        RFile file;

    };

public:

    ~StreamLogger(){}

    static StreamLogger& begin(){

        StreamLogger* self = new (ELeave) StreamLogger;

        return *self;

    }

    void suicide(){ delete this; }

    StreamLogger& operator<<(const TDesC& aText)

        {

        LogFile file;

        HBufC8* text = HBufC8::NewL( aText.Length() );

        TPtr8 textPtr = text->Des();

        textPtr.Copy( aText );

        file().Write( *text );

        delete text;

        return *this;

        }

    StreamLogger& operator<<(TInt n)

        {

        LogFile file;

        TInt i=1;

        for(TInt v=n; v!=0; ++i, v/=10){}

        HBufC* text = HBufC::NewL( i );

        TPtr textPtr = text->Des();

        _LIT(KFmt, "%d");

        textPtr.Format( KFmt, n );

        HBufC8*  text8 = HBufC8::NewL( textPtr.Length() );

        TPtr8 textPtr8 = text8->Des();

        textPtr8.Copy(*text);

        file().Write( *text8 );

        delete text;

        delete text8;

        return *this;

        }

    StreamLogger& cr()

        {

        LogFile file;

        TBuf8<2> enter;

        enter.Append( 13 );

        enter.Append( 10 );

        file().Write( enter );

        return *this;

        }

    typedef StreamLogger& (*_Manipulator)(StreamLogger&);

    StreamLogger& operator<<(_Manipulator op){ return op(*this); }

private:

    StreamLogger(){}    //disable ctor

};

inline StreamLogger& end(StreamLogger& self){ self.suicide(); return self; }

inline StreamLogger& endl(StreamLogger& self){ self.cr(); return self; }

#endif //C_STREAMLOGGER_H