Method JSObjectKeysProxy_intersect

src/JSObjectKeysProxy.cc:232–316

}

PyObject *JSObjectKeysProxyMethodDefinitions::JSObjectKeysProxy_intersect(JSObjectKeysProxy *self, PyObject *other) {
  PyObject *result;
  PyObject *it;
  PyObject *key;
  Py_ssize_t len_self;
  int rv;

  // Python interpreter swaps parameters when dict view is on right side of &
  if (!PyDictViewSet_Check(self)) {
    PyObject *tmp = other;
    other = (PyObject *)self;
    self = (JSObjectKeysProxy *)tmp;
  }

  if (PyObject_TypeCheck(self, &JSObjectKeysProxyType)) {
    len_self = JSObjectKeysProxyMethodDefinitions::JSObjectKeysProxy_length(self);
  }
  else {
    len_self = dictview_len((_PyDictViewObject *)self);
  }

  // if other is a set and self is smaller than other, reuse set intersection logic
  if (PySet_Check(other) && len_self <= PyObject_Size(other)) {
    return PyObject_CallMethod(other, "intersection", "O", self);
  }

  // if other is another dict view, and it is bigger than self, swap them
  if (PyDictViewSet_Check(other)) {
    Py_ssize_t len_other = dictview_len((_PyDictViewObject *)other);
    if (len_other > len_self) {
      PyObject *tmp = other;
      other = (PyObject *)self;
      self = (JSObjectKeysProxy *)tmp;
    }
  }

  /* at this point, two things should be true
     1. self is a dictview
     2. if other is a dictview then it is smaller than self */
  result = PySet_New(NULL);
  if (result == NULL) {
    return NULL;
  }

  it = PyObject_GetIter(other);
  if (it == NULL) {
    Py_DECREF(result);
    return NULL;
  }

  while ((key = PyIter_Next(it)) != NULL) {
    if (PyObject_TypeCheck(self, &JSObjectKeysProxyType)) {
      rv = JSObjectKeysProxyMethodDefinitions::JSObjectKeysProxy_contains(self, key);
    }
    else {
      if (((_PyDictViewObject *)self)->dv_dict == NULL) {
        rv = 0;
      } else {