From fbaec4b4e6fe735efe6916fe5b92805a0d96bf8a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C4=90o=C3=A0n=20Tr=E1=BA=A7n=20C=C3=B4ng=20Danh?=
 <congdanhqx@gmail.com>
Date: Wed, 21 Sep 2022 10:32:11 +0700
Subject: [PATCH] python: enum: fix build for Python 3.11
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Python 3.9 introduced Py_SET_SIZE function to set size instead of
relying on Py_SIZE() as a macro [3.9].

Python 3.10 started to encourage to use Py_SET_SIZE instead of
assigning into return value of Py_SIZE [3.10].

Python 3.11 flips the switch, turn Py_SIZE into a function [3.11],
thus Py_SIZE(obj) will be a rvalue. We need to use Py_SET_SIZE
to set size now.

[3.9]: https://docs.python.org/3.9/c-api/structures.html#c.Py_SET_SIZE
[3.10]: https://docs.python.org/3.10/c-api/structures.html#c.Py_SIZE
[3.11]: https://docs.python.org/3.11/c-api/structures.html#c.Py_SIZE

Signed-off-by: Đoàn Trần Công Danh <congdanhqx@gmail.com>
Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
[Upstream status:
https://github.com/mchehab/zbar/pull/231]
---
 python/enum.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/python/enum.c b/python/enum.c
index dfe1b1e..946344f 100644
--- a/python/enum.c
+++ b/python/enum.c
@@ -52,7 +52,11 @@ enumitem_new (PyTypeObject *type,
 
     /* we assume the "fast path" for a single-digit ints (see longobject.c) */
     /* this also holds if we get a small_int preallocated long */
+#if PY_VERSION_HEX >= 0x03090000
+    Py_SET_SIZE(&self->val, Py_SIZE(longval));
+#else
     Py_SIZE(&self->val) = Py_SIZE(longval);
+#endif
     self->val.ob_digit[0] = longval->ob_digit[0];
     Py_DECREF(longval);
 #else
@@ -143,7 +147,11 @@ zbarEnumItem_New (PyObject *byname,
 
     /* we assume the "fast path" for a single-digit ints (see longobject.c) */
     /* this also holds if we get a small_int preallocated long */
+#if PY_VERSION_HEX >= 0x03090000
+    Py_SET_SIZE(&self->val, Py_SIZE(longval));
+#else
     Py_SIZE(&self->val) = Py_SIZE(longval);
+#endif
     self->val.ob_digit[0] = longval->ob_digit[0];
     Py_DECREF(longval);
 
-- 
2.34.1