Function get_args_and_kwargs

numpy/core/src/multiarray/arrayfunction_override.c:213–249

* Helper to convert from vectorcall convention, since the protocol requires * args and kwargs to be passed as tuple and dict explicitly. * We always pass a dict, so always returns it. */

 * We always pass a dict, so always returns it.
 */
static int
get_args_and_kwargs(
        PyObject *const *fast_args, Py_ssize_t len_args, PyObject *kwnames,
        PyObject **out_args, PyObject **out_kwargs)
{
    len_args = PyVectorcall_NARGS(len_args);
    PyObject *args = PyTuple_New(len_args);
    PyObject *kwargs = NULL;

    if (args == NULL) {
        return -1;
    }
    for (Py_ssize_t i = 0; i < len_args; i++) {
        Py_INCREF(fast_args[i]);
        PyTuple_SET_ITEM(args, i, fast_args[i]);
    }
    kwargs = PyDict_New();
    if (kwargs == NULL) {
        Py_DECREF(args);
        return -1;
    }
    if (kwnames != NULL) {
        Py_ssize_t nkwargs = PyTuple_GET_SIZE(kwnames);
        for (Py_ssize_t i = 0; i < nkwargs; i++) {
            PyObject *key = PyTuple_GET_ITEM(kwnames, i);
            PyObject *value = fast_args[i+len_args];
            if (PyDict_SetItem(kwargs, key, value) < 0) {
                Py_DECREF(args);
                Py_DECREF(kwargs);
                return -1;
            }
        }
    }
    *out_args = args;
    *out_kwargs = kwargs;
    return 0;
}


static void