der_heim_bit_string_cmp
return der_heim_bit_string_cmp((heim_bit_string *)a, (heim_bit_string *)b);
ret = der_heim_bit_string_cmp(&bs1, &bs2);
ret = der_heim_bit_string_cmp(&bs1, &bs2);
der_heim_bit_string_cmp (
diff = der_heim_bit_string_cmp(&p->signatureValue, &q->signatureValue);