gettime.h

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// Luanti
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
 
#pragma once
 
#include <ctime>
#include <string>
#include <mutex>
 
inline struct tm mt_localtime()
{
        // initialize the time zone on first invocation
        static std::once_flag tz_init;
        std::call_once(tz_init, [] {
#ifdef _WIN32
                _tzset();
#else
                tzset();
#endif
                });
 
        struct tm ret;
        time_t t = time(NULL);
        // TODO we should check if the function returns NULL, which would mean error
#ifdef _WIN32
        localtime_s(&ret, &t);
#else
        localtime_r(&t, &ret);
#endif
        return ret;
}
 
 
inline std::string getTimestamp()
{
        const struct tm tm = mt_localtime();
        char cs[20]; // YYYY-MM-DD HH:MM:SS + '\0'
        strftime(cs, 20, "%Y-%m-%d %H:%M:%S", &tm);
        return cs;
}