dgFunnel.h

00001 // -*- c++ -*-
00002 //
00003 // $Id$
00004 //
00005 // This program is free software; you can redistribute it and/or modify
00006 // it under the terms of the GNU General Public License as published by
00007 // the Free Software Foundation; either version 2 of the License, or
00008 // (at your option) any later version.
00009 //
00010 // This program is distributed in the hope that it will be useful,
00011 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00012 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013 // GNU General Public License for more details.
00014 //
00015 // You should have received a copy of the GNU General Public License
00016 // along with this program; if not, write to the Free Software
00017 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00018 //
00019 // This file is part of Depression Glass library.
00020 //
00021 // Copyright (c) 2002. Dimitry Kloper <kloper@users.sf.net> . 
00022 //
00023 // dgFunnel.h -- channel funnel into physical stream
00024 //
00025 
00026 #ifndef _dgFunnel_h_
00027 #define _dgFunnel_h_
00028 
00034 #include "dgChannelBuf.h"
00035 
00036 namespace DGD {
00037 
00038 class funnel;
00039 
00057 class funnelbuf: public channelbuf {
00058    public:
00059       friend class funnel;
00060 
00065       class Callback {
00066          public:
00067             virtual void operator () ( unsigned long line, 
00068                                        unsigned long column,
00069                                        unsigned long bytes ) = 0;
00070       };
00071 
00072    private:
00073       void post_process();
00074 
00075       void assoc( std::ostream* );
00076 
00077       void callback( Callback* cb );
00078       const Callback* callback() const;
00079 
00080    public:
00081       funnelbuf();
00082       ~funnelbuf();
00083 
00084    private:
00085       Callback*     m_callback;
00086 };
00087 
00110 class funnel: public std::ostream, public funnelbuf::Callback {
00111    public:
00112       typedef std::ostream Parent;
00113       
00114    public:
00115       funnel( std::ostream& physical_stream );
00116       funnelbuf&      rdbuf();
00117 
00118       virtual void header();
00119 
00120    protected:
00125       virtual void operator () ( unsigned long line, 
00126                                  unsigned long column,
00127                                  unsigned long bytes ) {};
00128 
00129    private:
00130       funnelbuf m_buffer;
00131 };
00132 
00133 }; // end of namespace DGD
00134 
00135 #endif /* _dgFunnel_h_ */
00136 
00137 /* 
00138  * Local Variables:
00139  * compile-command: "make dgFunnel.obj"
00140  * End:
00141  */
00142 
00143