Function sort_compare_key_func

src/JSArrayProxy.cc:1079–1134

private

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

  JS::RootedObject callee(cx, &args.callee());

  JS::RootedValue keyFunc(cx);
  if (!JS_GetProperty(cx, callee, "_key_func_param", &keyFunc)) {
    PyErr_Format(PyExc_SystemError, "%s JSAPI call failed", JSArrayProxyType.tp_name);
    return false;
  }
  PyObject *keyfunc = (PyObject *)keyFunc.toPrivate();

  JS::RootedValue reverseValue(cx);
  if (!JS_GetProperty(cx, callee, "_reverse_param", &reverseValue)) {
    PyErr_Format(PyExc_SystemError, "%s JSAPI call failed", JSArrayProxyType.tp_name);
    return false;
  }
  bool reverse = reverseValue.toBoolean();

  JS::RootedValue elementVal0(cx, args[0]);
  PyObject *args_0 = pyTypeFactory(cx, elementVal0);
  PyObject *args_0_result = PyObject_CallFunction(keyfunc, "O", args_0);
  Py_DECREF(args_0);
  if (!args_0_result) {
    return false;
  }

  JS::RootedValue elementVal1(cx, args[1]);
  PyObject *args_1 = pyTypeFactory(cx, elementVal1);
  PyObject *args_1_result = PyObject_CallFunction(keyfunc, "O", args_1);
  Py_DECREF(args_1);
  if (!args_1_result) {
    return false;
  }

  int cmp = PyObject_RichCompareBool(args_0_result, args_1_result, Py_LT);
  if (cmp > 0) {
    args.rval().setInt32(reverse ? 1 : -1);
  } else if (cmp == 0) {
    cmp = PyObject_RichCompareBool(args_0_result, args_1_result, Py_EQ);
    if (cmp > 0) {
      args.rval().setInt32(0);
    }
    else if (cmp == 0) {
      args.rval().setInt32(reverse ? -1 : 1);
    }
    else {
      return false;
    }
  }
  else {
    return false;
  }

  return true;
}

// private