tfLogger.h

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/*******************************************************************************
 * This file is part of Tissue Forge.
 * Copyright (c) 2022-2024 T.J. Sego
 * 
 * This program 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 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 Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 ******************************************************************************/

 
#ifndef _SOURCE_TFLOGGER_H_
#define _SOURCE_TFLOGGER_H_
 
#include <tf_port.h>
#include <sstream>
 
 
namespace TissueForge {
 
 
    class CAPI_EXPORT LoggingBuffer
    {
    public:
        LoggingBuffer(int level, const char* func, const char* file, int line);

        ~LoggingBuffer();

        std::ostream &stream();
 
    private:
        std::stringstream buffer;
        int level;
        const char* func;
        const char* file;
        int line;
    };
 
    enum LogLevel
    {
        LOG_CURRENT = 0, 
        LOG_FATAL = 1,   
        LOG_CRITICAL,    
        LOG_ERROR,       
        LOG_WARNING,     
        LOG_NOTICE,      
        LOG_INFORMATION, 
        LOG_DEBUG,       
        LOG_TRACE        
    };
 
    enum LogEvent
    {
        LOG_OUTPUTSTREAM_CHANGED,
        LOG_LEVEL_CHANGED,
        LOG_CALLBACK_SET
    };
 
    typedef HRESULT (*LoggerCallback)(LogEvent, std::ostream *);

    class CAPI_EXPORT Logger
    {
    public:

        static void setLevel(int level = LOG_CURRENT);

        static int getLevel();

        static void disableLogging();

        static void disableConsoleLogging();

        static void enableConsoleLogging(int level = LOG_CURRENT);

        static void enableFileLogging(const std::string& fileName = "",
                int level = LOG_CURRENT);

        static void disableFileLogging();

        static std::string getCurrentLevelAsString();

        static std::string getFileName();

        static std::string levelToString(int level);

        static LogLevel stringToLevel(const std::string& str);

        static void log(LogLevel level, const std::string& msg);
 

        static void setConsoleStream(std::ostream *os);
 
 
        static void setCallback(LoggerCallback);
 
    };
 
};
 
#define TF_Log(level) \
    if (level > TissueForge::Logger::getLevel()) { ; } \
    else TissueForge::LoggingBuffer(level, TF_FUNCTION, __FILE__, __LINE__).stream()
 
#endif // _SOURCE_TFLOGGER_H_