int ecc_map(ecc_point* P, mp_int* modulus, mp_digit mp)
{
    return ecc_map_ex(P, modulus, mp, 0);
}
int ecc_map(ecc_point* P, mp_int* modulus, mp_digit mp)
{
    return ecc_map_ex(P, modulus, mp, 0);
}