Function creachadair_imath_sys::mp_int_root

pub unsafe extern "C" fn mp_int_root(
    a: mp_int,
    b: mp_small,
    c: mp_int
) -> mp_result

Sets c to the greatest integer not less than the bth root of a, using Newton’s root-finding algorithm. It returns MP_UNDEF if a < 0 and b is even.