log_stream_uniq.hpp

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/*
  CLAW - a C++ Library Absolutely Wonderful
 
  CLAW is a free library without any particular aim but being useful to
  anyone.
 
  Copyright (C) 2005-2011 Julien Jorge
 
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.
 
  This library 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
  Lesser General Public License for more details.
 
  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
  contact: julien.jorge@stuff-o-matic.com
*/
#ifndef __CLAW_LOG_STREAM_UNIQ_HPP__
#define __CLAW_LOG_STREAM_UNIQ_HPP__
 
#include <claw/logger/log_stream.hpp>
 
#include <string>
 
#ifndef CLAW_LOGGER_EXPORT
#ifdef CLAW_LOGGER_NO_EXPORT
#define CLAW_LOGGER_EXPORT
#else
#ifdef _WIN32
#ifdef claw_logger_EXPORTS
#define CLAW_LOGGER_EXPORT __declspec(dllexport)
#else
#define CLAW_LOGGER_EXPORT __declspec(dllimport)
#endif // def claw_logger_EXPORTS
#else  // def _WIN32
#define CLAW_LOGGER_EXPORT
#endif // def _WIN32
#endif // def CLAW_LOGGER_NO_EXPORT
#endif // ndef CLAW_LOGGER_EXPORT
 
namespace claw
{
  class CLAW_LOGGER_EXPORT log_stream_uniq
    : public log_stream
    , public pattern::non_copyable
  {
  public:
    explicit log_stream_uniq(log_stream* s);
    virtual ~log_stream_uniq();
 
    virtual void write(const std::string& str);
    virtual void flush();
 
  private:
    void output_current_line();
 
  private:
    log_stream* m_stream;

    std::string m_current_line;

    std::string m_previous_line;

    std::size_t m_repetition_count;
 
  }; // class log_stream_uniq
}
 
#endif // __CLAW_LOG_STREAM_UNIQ_HPP__