LogFile.hpp

/*

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This file is part of Chaste.

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 * Redistributions in binary form must reproduce the above copyright notice,
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   software without specific prior written permission.

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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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*/

#ifndef LOGFILE_HPP_
#define LOGFILE_HPP_

#include <string>
#include "OutputFileHandler.hpp"
#include <iostream>
#include <cassert>
#include <iomanip>
#include <ctime>

class LogFile
{
private:

    static LogFile* mpInstance;

    bool mFileSet;

    out_stream mpOutStream;

    time_t mInitTime;

    unsigned mLevel;

    static const unsigned mMaxLoggingLevel = 2;

    unsigned mPrecision;

    LogFile();

public:

    static LogFile* Instance();

    static unsigned Level();

    void Set(unsigned level, const std::string& rDirectory, const std::string& rFileName="log.txt");

    static unsigned MaxLoggingLevel();

    void SetPrecision(unsigned precision);

    void WriteHeader(std::string simulationType="");

    void WriteElapsedTime(std::string pre="");

    static void Close();

    bool IsFileSet();

    template <class T>
    LogFile& operator<<(T message)
    {
        if (mFileSet)
        {
            (*mpOutStream) << std::setprecision((int)mPrecision) << message << std::flush;
        }

        return *this;
    }
};

// Define the log macro
#define LOG(level, message) assert(level>0); if(level <= LogFile::Level()) { (*LogFile::Instance()) << message << "\n"; }
#define LOG_AND_COUT(level, message) {std::cout << message << std::endl << std::flush; LOG(level, message); }

#endif /*LOGFILE_HPP_*/