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// $Id: RlogFile.hpp 492 2013-02-24 22:14:47Z mueller $

//

// Copyright 2011-2013 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>

//

// This program is free software; you may redistribute and/or modify it under

// the terms of the GNU General Public License as published by the Free

// Software Foundation, either version 2, or at your option any later version.

//

// This program is distributed in the hope that it will be useful, but

// WITHOUT ANY WARRANTY, without even the implied warranty of MERCHANTABILITY

// or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// for complete details.

// 

// Revision History: 

// Date         Rev Version  Comment

// 2013-02-23   492   2.1    add Name(), keep log file name; add Dump()

// 2013-02-22   491   2.0    add Write(),IsNew(), RlogMsg iface; use lockable

// 2011-04-24   380   1.0.1  use boost::noncopyable (instead of private dcl's)

// 2011-01-30   357   1.0    Initial version

// ---------------------------------------------------------------------------

/*!

  \file

  \version $Id: RlogFile.hpp 492 2013-02-24 22:14:47Z mueller $

  \brief   Declaration of class RlogFile.

*/

#ifndef included_Retro_RlogFile

#define included_Retro_RlogFile 1

#include <string>

#include <ostream>

#include <fstream>

#include "boost/utility.hpp"

#include "boost/thread/mutex.hpp"

namespace Retro {

  class RlogMsg;                            // forw decl to avoid circular incl

  class RlogFile : private boost::noncopyable {

    public:

                    RlogFile();

      explicit      RlogFile(std::ostream* os, const std::string& name = "");

                   ~RlogFile();

      bool          IsNew() const;

      bool          Open(std::string name);

      void          Close();

      void          UseStream(std::ostream* os, const std::string& name = "");

      const std::string&  Name() const;

      void          Write(const std::string& str, char tag = 0);

      void          Dump(std::ostream& os, int ind=0, const char* text=0) const;

      // provide boost Lockable interface

      void          lock();

      void          unlock();

      RlogFile&     operator<<(const RlogMsg& lmsg);

    protected:

      std::ostream& Stream();

      void          ClearTime();

    protected:

      std::ostream* fpExtStream;            //!< pointer to external stream

      std::ofstream fIntStream;             //!< internal stream

      bool          fNew;                   //!< true if never opened or used

      std::string   fName;                  //!< log file name

      int           fTagYear;               //!< year of last time tag

      int           fTagMonth;              //!< month of last time tag

      int           fTagDay;                //!< day of last time tag

      boost::mutex  fMutex;                 //!< mutex to lock file

  };

} // end namespace Retro

#include "RlogFile.ipp"

#endif