From 74be7c8354ce18fa150ae5096acb9b01ea56783e Mon Sep 17 00:00:00 2001
From: Hironobu Yamashita <h.y.acetaminophen@gmail.com>
Date: Fri, 25 Jun 2021 09:02:22 +0000
Subject: ptexenc/unicode-jp.c: UCS2toJISnative(0) fix by H.Kitagawa

git-svn-id: svn://tug.org/texlive/trunk@59698 c570f23f-e606-0410-a88d-b1316a301751
---
 Build/source/texk/ptexenc/ChangeLog    | 5 +++++
 Build/source/texk/ptexenc/unicode-jp.c | 1 +
 2 files changed, 6 insertions(+)

diff --git a/Build/source/texk/ptexenc/ChangeLog b/Build/source/texk/ptexenc/ChangeLog
index 29f547bf443..cfc0620c330 100644
--- a/Build/source/texk/ptexenc/ChangeLog
+++ b/Build/source/texk/ptexenc/ChangeLog
@@ -1,3 +1,8 @@
+2021-06-25  Hironori Kitagawa  <h_kitagawa2001@yahoo.co.jp>
+
+	* unicode-jp.c: changed the returned value of UCS2toJISnative(0)
+	from 0x222F to 0 to indicate that it is invalid.
+
 2021-04-17  Karl Berry  <karl@tug.org>
 
 	* version.ac: now 1.3.11/dev since TL'21 is released.
diff --git a/Build/source/texk/ptexenc/unicode-jp.c b/Build/source/texk/ptexenc/unicode-jp.c
index 1cad4a1a3fb..4bc896b14e1 100644
--- a/Build/source/texk/ptexenc/unicode-jp.c
+++ b/Build/source/texk/ptexenc/unicode-jp.c
@@ -112,6 +112,7 @@ static int UCS2toJISnative(int ucs2)
 {
     int i, j;
 
+    if (ucs2==0) return 0;
     for (i=0; i<MAXJIS; i++) {
         for (j=0; j<94; j++) {
             if (UnicodeTbl[i][j] == ucs2) {
-- 
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