Function PySlice_GetIndicesEx

pub unsafe fn PySlice_GetIndicesEx(
    slice: *mut PyObject,
    length: Py_ssize_t,
    start: *mut Py_ssize_t,
    stop: *mut Py_ssize_t,
    step: *mut Py_ssize_t,
    slicelength: *mut Py_ssize_t,
) -> c_int