Function write_date_time

RedEdrShared/loguru.cpp:691–701

	}

	void write_date_time(char* buff, unsigned long long buff_size)
	{
		auto now = system_clock::now();
		long long ms_since_epoch = duration_cast<milliseconds>(now.time_since_epoch()).count();
		time_t sec_since_epoch = time_t(ms_since_epoch / 1000);
		tm time_info;
		localtime_r(&sec_since_epoch, &time_info);
		snprintf(buff, buff_size, "%04d%02d%02d_%02d%02d%02d.%03lld",
			1900 + time_info.tm_year, 1 + time_info.tm_mon, time_info.tm_mday,
			time_info.tm_hour, time_info.tm_min, time_info.tm_sec, ms_since_epoch % 1000);
	}

	const char* argv0_filename()
	{