f64 microtime()
{
	return ((f64)std::chrono::duration_cast<std::chrono::microseconds>(
		std::chrono::high_resolution_clock::now().time_since_epoch()).count()) / 1000000;
}

u64 time()
{
	return(std::time(0));
}

string date(string format = "", u64 timestamp = 0)
{
	string ts;
	string fmt;
	if(timestamp > 0) ts = string("-d '@")+to_string(timestamp)+"'";
	if(format != "") fmt = string("+'"+format+"'");
	return(trim(shell_exec("date "+ts+" "+fmt)));
}

string gmdate(string format = "", u64 timestamp = 0)
{
	string ts;
	string fmt;
	if(timestamp > 0) ts = string("'@")+to_string(timestamp)+"'";
	if(format != "") fmt = string("+'"+format+"'");
	return(trim(shell_exec("date -u "+ts+" "+fmt)));
}

u64 parse_time(string time_string)
{
	return(int_val(trim(shell_exec("date -u -d '"+time_string+"' +'%s'"))));
}