commit 462502b08484796d9a4b981aee5becac574ee43a
author Serhiy Storchaka <storchaka@gmail.com> Sat Oct 10 09:33:11 2015 +0300
committer Serhiy Storchaka <storchaka@gmail.com> Sat Oct 10 09:33:11 2015 +0300
tree e39673830735e2789b2cf5ab16771350a5f382b0
parent 9918775206b86ba9a2af0287ec48c28ef3504dce

Issue #24848: Fixed yet one bug in UTF-7 decoder.  Testing for BASE64 character
was locale depending.

Objects/unicodeobject.c

diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 6c46263..9368a3a 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -1555,7 +1555,10 @@
 /* Is c a base-64 character? */
 
 #define IS_BASE64(c) \
-    (isalnum(c) || (c) == '+' || (c) == '/')
+    (((c) >= 'A' && (c) <= 'Z') ||     \
+     ((c) >= 'a' && (c) <= 'z') ||     \
+     ((c) >= '0' && (c) <= '9') ||     \
+     (c) == '+' || (c) == '/')
 
 /* given that c is a base-64 character, what is its base-64 value? */