From a552b35afa83816d3a4bfaa32be91c196a68e41b Mon Sep 17 00:00:00 2001
From: Kenichi Handa
Date: Wed, 8 Sep 2010 11:21:03 +0900
Subject: coding.c (encode_coding_iso_2022): Do not optimize for ASCII if we
 may use designation or locking-shift.

---
 src/coding.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'src/coding.c')

diff --git a/src/coding.c b/src/coding.c
index d62998f4c8b..92b328091ff 100644
--- a/src/coding.c
+++ b/src/coding.c
@@ -4528,7 +4528,10 @@ encode_coding_iso_2022 (coding)
   charset_list = CODING_ATTR_CHARSET_LIST (attrs);
   coding->safe_charsets = SDATA (CODING_ATTR_SAFE_CHARSETS (attrs));
 
-  ascii_compatible = ! NILP (CODING_ATTR_ASCII_COMPAT (attrs));
+  ascii_compatible
+    = (! NILP (CODING_ATTR_ASCII_COMPAT (attrs))
+       && ! (CODING_ISO_FLAGS (coding) & (CODING_ISO_FLAG_DESIGNATION
+					  | CODING_ISO_FLAG_LOCKING_SHIFT)));
 
   while (charbuf < charbuf_end)
     {
-- 
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