logger.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) 2005-2008 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_LOGGER_HPP__
00031 #define __CLAW_LOGGER_HPP__
00032 
00033 #include <ostream>
00034 #include <list>
00035 #include <string>
00036 
00037 #include <claw/log_level.hpp>
00038 #include <claw/log_stream.hpp>
00039 
00040 #ifndef CLAW_LOGGER_EXPORT
00041 #  ifdef _WIN32
00042 #    ifdef claw_logger_EXPORTS
00043 #      define CLAW_LOGGER_EXPORT __declspec(dllexport)
00044 #    else
00045 #      define CLAW_LOGGER_EXPORT __declspec(dllimport)
00046 #    endif // def claw_logger_EXPORTS
00047 #  else // def _WIN32
00048 #    define CLAW_LOGGER_EXPORT
00049 #  endif // def _WIN32
00050 #endif // ndef CLAW_LOGGER_EXPORT
00051 
00052 namespace claw
00053 {
00067   class log_system
00068   {
00069   public:
00070     typedef log_stream stream_type;
00071     typedef std::list<stream_type*> stream_list_type;
00072 
00073   public:
00074     CLAW_LOGGER_EXPORT log_system();
00075     CLAW_LOGGER_EXPORT ~log_system();
00076     CLAW_LOGGER_EXPORT void clear();
00077 
00078     CLAW_LOGGER_EXPORT void merge( stream_type* s );
00079     CLAW_LOGGER_EXPORT void remove( const stream_type* s );
00080     CLAW_LOGGER_EXPORT void set( stream_type* s );
00081     CLAW_LOGGER_EXPORT void set_level( int lvl );
00082     CLAW_LOGGER_EXPORT void set_level( const log_level& lvl );
00083 
00084     CLAW_LOGGER_EXPORT void flush();
00085 
00086     template<typename T>
00087     log_system& operator<<( const T& that );
00088 
00089     CLAW_LOGGER_EXPORT log_system& operator<<( const log_level& that );
00090     CLAW_LOGGER_EXPORT log_system& operator<<( log_system& (*pf)(log_system&) );
00091 
00092   private:
00095     int m_log_level;
00096 
00098     int m_message_level;
00099 
00101     stream_list_type m_stream;
00102 
00103   }; // class log_system
00104 
00105   CLAW_LOGGER_EXPORT extern log_system logger;
00106 
00107   CLAW_LOGGER_EXPORT log_system& lendl(log_system& log);
00108 
00109 } // namespace claw
00110 
00111 namespace std
00112 {
00113   CLAW_LOGGER_EXPORT claw::log_system& endl( claw::log_system& log );
00114 } // namespace std
00115 
00116 // template methods
00117 #include <claw/impl/logger.tpp>
00118 
00119 #endif // __CLAW_LOGGER_HPP__

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