#2691: document PyLong (s)size_t APIs, patch by Alexander Belopolsky.
diff --git a/Doc/c-api/long.rst b/Doc/c-api/long.rst
index 49a5e6f..57015db 100644
--- a/Doc/c-api/long.rst
+++ b/Doc/c-api/long.rst
@@ -49,6 +49,22 @@
*NULL* on failure.
+.. cfunction:: PyObject* PyLong_FromSsize_t(Py_ssize_t v)
+
+ Return a new :ctype:`PyLongObject` object from a C :ctype:`Py_ssize_t`, or
+ *NULL* on failure.
+
+ .. versionadded:: 2.5
+
+
+.. cfunction:: PyObject* PyLong_FromSize_t(size_t v)
+
+ Return a new :ctype:`PyLongObject` object from a C :ctype:`size_t`, or
+ *NULL* on failure.
+
+ .. versionadded:: 2.5
+
+
.. cfunction:: PyObject* PyLong_FromLongLong(PY_LONG_LONG v)
Return a new :ctype:`PyLongObject` object from a C :ctype:`long long`, or *NULL*
@@ -109,7 +125,21 @@
single: OverflowError (built-in exception)
Return a C :ctype:`long` representation of the contents of *pylong*. If
- *pylong* is greater than :const:`LONG_MAX`, an :exc:`OverflowError` is raised.
+ *pylong* is greater than :const:`LONG_MAX`, an :exc:`OverflowError` is raised
+ and ``-1`` will be returned.
+
+
+.. cfunction:: Py_ssize_t PyLong_AsSsize_t(PyObject *pylong)
+
+ .. index::
+ single: PY_SSIZE_T_MAX
+ single: OverflowError (built-in exception)
+
+ Return a C :ctype:`Py_ssize_t` representation of the contents of *pylong*. If
+ *pylong* is greater than :const:`PY_SSIZE_T_MAX`, an :exc:`OverflowError` is raised
+ and ``-1`` will be returned.
+
+ .. versionadded:: 2.5
.. cfunction:: unsigned long PyLong_AsUnsignedLong(PyObject *pylong)