Function Fory_PyPrimitiveCollectionWriteToBuffer

python/pyfory/cpp/pyfory.cc:1468–1502

}

int Fory_PyPrimitiveCollectionWriteToBuffer(PyObject *collection,
                                            Buffer *buffer, uint8_t type_id) {
  PyObject **items = py_sequence_get_items(collection);
  if (items != nullptr) {
    const Py_ssize_t size = Py_SIZE(collection);
    // Refactor guard:
    // - tuple is immutable, so raw item pointer iteration is always safe.
    // - list is mutable, so use raw pointer path only when
    //   can_use_list_sequence_fastpath(...) proves callback-free conversion.
    // Otherwise we must fall back to iterator path for safety.
    if (!PyList_CheckExact(collection) ||
        can_use_list_sequence_fastpath(items, size, type_id)) {
      return write_primitive_sequence(items, size, buffer, type_id);
    }
  }
  PyObject *iterator = PyObject_GetIter(collection);
  if (FORY_PREDICT_FALSE(iterator == nullptr)) {
    return -1;
  }
  int rc = 0;
  for (PyObject *item = PyIter_Next(iterator); item != nullptr;
       item = PyIter_Next(iterator)) {
    if (FORY_PREDICT_FALSE(write_primitive_item(buffer, item, type_id) != 0)) {
      Py_DECREF(item);
      rc = -1;
      break;
    }
    Py_DECREF(item);
  }
  if (FORY_PREDICT_FALSE(rc == 0 && PyErr_Occurred() != nullptr)) {
    rc = -1;
  }
  Py_DECREF(iterator);
  return rc;
}

int Fory_PyPrimitiveCollectionReadFromBuffer(PyObject *collection,
                                             Buffer *buffer, Py_ssize_t size,