Issue #16129: Add `Py_SetStandardStreamEncoding`
This new pre-initialization API allows embedding
applications like Blender to force a particular
encoding and error handler for the standard IO streams.
Also refactors Modules/_testembed.c to let us start
testing multiple embedding scenarios.
(Initial patch by Bastien Montagne)
diff --git a/Doc/c-api/init.rst b/Doc/c-api/init.rst
index 9ed2a3a..1a54321 100644
--- a/Doc/c-api/init.rst
+++ b/Doc/c-api/init.rst
@@ -86,6 +86,33 @@
=======================
+.. c:function:: int Py_SetStandardStreamEncoding(char *encoding, char *errors)
+
+ .. index::
+ single: Py_Initialize()
+ single: main()
+ triple: stdin; stdout; sdterr
+
+ This function should be called before :c:func:`Py_Initialize`. It
+ specifies which encoding and error handling to use with standard io,
+ with the same meanings as in :func:`str.encode`.
+
+ It overrides :envvar:`PYTHONIOENCODING` values, and allows embedding code
+ to control io encoding when the environment variable does not work.
+
+ ``encoding`` and/or ``errors`` may be NULL to use
+ :envvar:`PYTHONIOENCODING` and/or default values (depending on other
+ settings).
+
+ Note that :data:`sys.stderr` always uses the "backslashreplace" error
+ handler, regardless of this (or any other) setting.
+
+ If :c:func:`Py_Finalize` is called, this function will need to be called
+ again in order to affect subsequent calls to :c:func:`Py_Initialize`.
+
+ Returns 0 if successful.
+
+
.. c:function:: void Py_SetProgramName(wchar_t *name)
.. index::