Input

 timetm

    A tm structure that expresses GMT. On input, tm_wday and tm_yday
    are ignored.

 tns

    Nanoseconds since time component.

 inacctm

    A tm structure that expresses days, hours, minutes, and seconds
    of inaccuracy. If tm_yday is negative, the inaccuracy is
    considered to be infinite. On input, tm_mday, tm_mon, tm_wday,
    tm_isdst, tm_gmtoff, and tm_zone are ignored.

 ins

    Nanoseconds of inaccuracy component.

    Output

 utc

    Resulting binary timestamp.