Function array_lastIndexOf

src/PyListProxyHandler.cc:605–665

}

static bool array_lastIndexOf(JSContext *cx, unsigned argc, JS::Value *vp) {
  JS::CallArgs args = JS::CallArgsFromVp(argc, vp);

  if (!args.requireAtLeast(cx, "lastIndexOf", 1)) {
    return false;
  }

  JS::RootedObject proxy(cx, JS::ToObject(cx, args.thisv()));
  if (!proxy) {
    return false;
  }
  PyObject *self = JS::GetMaybePtrFromReservedSlot<PyObject>(proxy, PyObjectSlot);

  Py_ssize_t selfLength = PyList_GET_SIZE(self);

  if (selfLength == 0) {
    args.rval().setInt32(-1);
    return true;
  }

  uint64_t start = selfLength - 1;
  if (args.length() > 1) {
    int64_t n;
    if (!JS::ToInt64(cx, args[1], &n)) {
      return false;
    }

    if (n < 0) {
      double d = double(selfLength) + n;
      if (d < 0) {
        args.rval().setInt32(-1);
        return true;
      }
      start = uint64_t(d);
    } else if (n < double(start)) {
      start = uint64_t(n);
    }
  }

  JS::RootedValue elementVal(cx, args[0].get());
  PyObject *element = pyTypeFactory(cx, elementVal);
  for (int64_t index = start; index >= 0; index--) {
    PyObject *item = PyList_GetItem(self, index);
    Py_INCREF(item);
    int cmp = PyObject_RichCompareBool(item, element, Py_EQ);
    Py_DECREF(item);
    if (cmp < 0) {
      Py_XDECREF(element);
      return false;
    }
    else if (cmp == 1) {
      Py_XDECREF(element);
      args.rval().setInt32(index);
      return true;
    }
  }
  Py_XDECREF(element);