mrb_class_name(mrb_state *mrb, struct RClass* c)
{
  mrb_value name;

  if (c == NULL) return NULL;
  name = class_name_str(mrb, c);
  return RSTRING_PTR(name);
}
mrb_class_name(mrb_state *mrb, struct RClass* c)
{
  mrb_value name;

  if (c == NULL) return NULL;
  name = class_name_str(mrb, c);
  return RSTRING_PTR(name);
}