From ff4c13688ec7f4ea212fadf16c6ad7c4d9f5ba11 Mon Sep 17 00:00:00 2001
From: naruse <naruse@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 15 Feb 2012 06:52:10 +0000
Subject: Add more description about Shift_JIS and CP50220.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34623 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 enc/iso_2022_jp.h | 7 ++++++-
 enc/shift_jis.c   | 4 ++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/enc/iso_2022_jp.h b/enc/iso_2022_jp.h
index 8cfad0be06..399c2f56a5 100644
--- a/enc/iso_2022_jp.h
+++ b/enc/iso_2022_jp.h
@@ -5,7 +5,12 @@ ENC_ALIAS("ISO2022-JP", "ISO-2022-JP");
 ENC_REPLICATE("ISO-2022-JP-2", "ISO-2022-JP");
 ENC_ALIAS("ISO2022-JP2", "ISO-2022-JP-2");
 
-/* Windows Codepage 50220
+/*
+ * Name: CP50220
+ * MIBenum: 2260
+ * Link: http://www.iana.org/assignments/charset-reg/CP50220
+ *
+ * Windows Codepage 50220
  * a ISO-2022-JP variant.
  * This includes
  * * US-ASCII
diff --git a/enc/shift_jis.c b/enc/shift_jis.c
index 9dcacb584d..942e0fb3af 100644
--- a/enc/shift_jis.c
+++ b/enc/shift_jis.c
@@ -381,6 +381,10 @@ OnigEncodingDefine(shift_jis, Shift_JIS) = {
  * MIBenum: 17
  * Link: http://www.iana.org/assignments/character-sets
  * Link: http://ja.wikipedia.org/wiki/Shift_JIS
+ *
+ * Note that this Shift_JIS's 7bit part is US-ASCII not JIX X 0201
+ * because Shift_JIS must be ASCII compatible encoding.
+ * See also the conversion table (enc/trans/japanese_sjis.trans).
  */
 
 /*
-- 
cgit v1.2.3