OpenSSL::PKey::EC::Point#initialize_copy

static VALUE
ossl_ec_point_initialize_copy(VALUE self, VALUE other)
{
    EC_POINT *point, *point_new;
    EC_GROUP *group;
    VALUE group_v;

    TypedData_Get_Struct(self, EC_POINT, &ossl_ec_point_type, point_new);
    if (point_new)
        ossl_raise(eEC_POINT, "EC::Point already initialized");
    GetECPoint(other, point);

    group_v = rb_obj_dup(rb_attr_get(other, id_i_group));
    GetECGroup(group_v, group);

    point_new = EC_POINT_dup(point, group);
    if (!point_new)
        ossl_raise(eEC_POINT, "EC_POINT_dup");
    RTYPEDDATA_DATA(self) = point_new;
    rb_ivar_set(self, id_i_group, group_v);

    return self;
}