Function ion_c_sys::ion_timestamp_get_thru_day

pub unsafe extern "C" fn ion_timestamp_get_thru_day(
    ptime: *mut ION_TIMESTAMP, 
    p_year: *mut c_int, 
    p_month: *mut c_int, 
    p_day: *mut c_int
) -> iERR

Get year, month, day If precision is not up to month/day, 0 will be returned as month/day value.