Issue #14288: Serialization support for builtin iterators.
diff --git a/Objects/bytesobject.c b/Objects/bytesobject.c
index 1d2fed7..0b95fdf 100644
--- a/Objects/bytesobject.c
+++ b/Objects/bytesobject.c
@@ -3074,9 +3074,43 @@
PyDoc_STRVAR(length_hint_doc,
"Private method returning an estimate of len(list(it)).");
+static PyObject *
+striter_reduce(striterobject *it)
+{
+ if (it->it_seq != NULL) {
+ return Py_BuildValue("N(O)n", _PyIter_GetBuiltin("iter"),
+ it->it_seq, it->it_index);
+ } else {
+ PyObject *u = PyUnicode_FromUnicode(NULL, 0);
+ if (u == NULL)
+ return NULL;
+ return Py_BuildValue("N(N)", _PyIter_GetBuiltin("iter"), u);
+ }
+}
+
+PyDoc_STRVAR(reduce_doc, "Return state information for pickling.");
+
+static PyObject *
+striter_setstate(striterobject *it, PyObject *state)
+{
+ Py_ssize_t index = PyLong_AsSsize_t(state);
+ if (index == -1 && PyErr_Occurred())
+ return NULL;
+ if (index < 0)
+ index = 0;
+ it->it_index = index;
+ Py_RETURN_NONE;
+}
+
+PyDoc_STRVAR(setstate_doc, "Set state information for unpickling.");
+
static PyMethodDef striter_methods[] = {
{"__length_hint__", (PyCFunction)striter_len, METH_NOARGS,
length_hint_doc},
+ {"__reduce__", (PyCFunction)striter_reduce, METH_NOARGS,
+ reduce_doc},
+ {"__setstate__", (PyCFunction)striter_setstate, METH_O,
+ setstate_doc},
{NULL, NULL} /* sentinel */
};