1unsafe extern "C" {
 2    pub unsafe fn zn64_normalize_base2k_ref(
 3        n: u64,
 4        base2k: u64,
 5        res: *mut i64,
 6        res_size: u64,
 7        res_sl: u64,
 8        a: *const i64,
 9        a_size: u64,
10        a_sl: u64,
11        tmp_space: *mut u8,
12    );
13}