Implement PEP 393.
diff --git a/Doc/c-api/unicode.rst b/Doc/c-api/unicode.rst
index e635514..b6306b1 100644
--- a/Doc/c-api/unicode.rst
+++ b/Doc/c-api/unicode.rst
@@ -1072,6 +1072,15 @@
occurred and an exception has been set.
+.. c:function:: Py_ssize_t PyUnicode_FindChar(PyObject *str, Py_UCS4 ch, Py_ssize_t start, Py_ssize_t end, int direction)
+
+ Return the first position of the character *ch* in ``str[start:end]`` using
+ the given *direction* (*direction* == 1 means to do a forward search,
+ *direction* == -1 a backward search). The return value is the index of the
+ first match; a value of ``-1`` indicates that no match was found, and ``-2``
+ indicates that an error occurred and an exception has been set.
+
+
.. c:function:: Py_ssize_t PyUnicode_Count(PyObject *str, PyObject *substr, Py_ssize_t start, Py_ssize_t end)
Return the number of non-overlapping occurrences of *substr* in