glog.h

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//
// Copyright (C) 2001-2013 Graeme Walker <graeme_walker@users.sourceforge.net>
// 
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, 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 more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
// ===

#ifndef G_LOG_H
#define G_LOG_H

#include "gdef.h"
#include <sstream>
#include <string>

namespace G
{
        class Log ;
}

class G::Log 
{ 
public:
        enum Severity { s_LogVerbose , s_LogSummary , s_Debug , s_Warning , s_Error , s_Assertion } ;

        class Line 
                { public: const char * m_file ; int m_line ; Line( const char *file , int line ) : m_file(file) , m_line(line) {} } ;

        Log( Severity , const char * file , int line ) ;

        ~Log() ;

        std::ostream & operator<<( const char * s ) ;

        std::ostream & operator<<( const std::string & s ) ;

private:
        void flush() ;
        bool active() ;

private:
        friend class G::Log::Line ;
        Severity m_severity ;
        std::ostringstream m_ss ;
        const char * m_file ;
        int m_line ;
} ;

#define G_LOG_OUTPUT( expr , severity ) do { G::Log(severity,__FILE__,__LINE__) << expr ; } while(0)
#if defined(G_WITH_DEBUG) || ( defined(_DEBUG) && ! defined(G_NO_DEBUG) )
#define G_DEBUG( expr ) G_LOG_OUTPUT( expr , G::Log::s_Debug )
#else
#define G_DEBUG( expr )
#endif
#if ! defined(G_NO_LOG)
#define G_LOG( expr ) G_LOG_OUTPUT( expr , G::Log::s_LogVerbose )
#else
#define G_LOG( expr )
#endif
#if ! defined(G_NO_LOG_S)
#define G_LOG_S( expr ) G_LOG_OUTPUT( expr , G::Log::s_LogSummary )
#else
#define G_LOG_S( expr )
#endif
#define G_WARNING( expr ) G_LOG_OUTPUT( expr , G::Log::s_Warning )
#define G_ERROR( expr ) G_LOG_OUTPUT( expr , G::Log::s_Error )

#endif