CLAW Library (a C++ Library Absolutely Wonderful) 1.5.5

log_stream_uniq.hpp

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00001 /*
00002   CLAW - a C++ Library Absolutely Wonderful
00003 
00004   CLAW is a free library without any particular aim but being useful to 
00005   anyone.
00006 
00007   Copyright (C) 2005-2010 Julien Jorge
00008 
00009   This library is free software; you can redistribute it and/or
00010   modify it under the terms of the GNU Lesser General Public
00011   License as published by the Free Software Foundation; either
00012   version 2.1 of the License, or (at your option) any later version.
00013 
00014   This library is distributed in the hope that it will be useful,
00015   but WITHOUT ANY WARRANTY; without even the implied warranty of
00016   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017   Lesser General Public License for more details.
00018 
00019   You should have received a copy of the GNU Lesser General Public
00020   License along with this library; if not, write to the Free Software
00021   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00022 
00023   contact: julien_jorge@yahoo.fr
00024 */
00030 #ifndef __CLAW_LOG_STREAM_UNIQ_HPP__
00031 #define __CLAW_LOG_STREAM_UNIQ_HPP__
00032 
00033 #include <string>
00034 #include <claw/log_stream.hpp>
00035 
00036 #ifndef CLAW_LOGGER_EXPORT
00037 #  ifdef CLAW_LOGGER_NO_EXPORT
00038 #    define CLAW_LOGGER_EXPORT
00039 #  else
00040 #    ifdef _WIN32
00041 #      ifdef claw_logger_EXPORTS
00042 #        define CLAW_LOGGER_EXPORT __declspec(dllexport)
00043 #      else
00044 #        define CLAW_LOGGER_EXPORT __declspec(dllimport)
00045 #      endif // def claw_logger_EXPORTS
00046 #    else // def _WIN32
00047 #      define CLAW_LOGGER_EXPORT
00048 #    endif // def _WIN32
00049 #  endif // def CLAW_LOGGER_NO_EXPORT
00050 #endif // ndef CLAW_LOGGER_EXPORT
00051 
00052 namespace claw
00053 {
00058   class CLAW_LOGGER_EXPORT log_stream_uniq:
00059     public log_stream,
00060     public pattern::non_copyable
00061   {
00062   public:
00063     explicit log_stream_uniq( log_stream* s );
00064     virtual ~log_stream_uniq();
00065 
00066     virtual void write( const std::string& str );
00067     virtual void flush();
00068 
00069   private:
00070     void output_current_line();
00071 
00072   private:
00074     log_stream* m_stream;
00075 
00077     std::string m_current_line;
00078 
00080     std::string m_previous_line;
00081 
00083     std::size_t m_repetition_count;
00084 
00085   }; // class log_stream_uniq
00086 } // namespace claw
00087 
00088 #endif // __CLAW_LOG_STREAM_UNIQ_HPP__