==

static VALUE
name_err_mesg_equal(VALUE obj1, VALUE obj2)
{
    VALUE *ptr1, *ptr2;
    int i;

    if (obj1 == obj2) return Qtrue;
    if (rb_obj_class(obj2) != rb_cNameErrorMesg)
        return Qfalse;

    TypedData_Get_Struct(obj1, VALUE, &name_err_mesg_data_type, ptr1);
    TypedData_Get_Struct(obj2, VALUE, &name_err_mesg_data_type, ptr2);
    for (i=0; i<NAME_ERR_MESG_COUNT; i++) {
        if (!rb_equal(ptr1[i], ptr2[i]))
            return Qfalse;
    }
    return Qtrue;
}