From: Heikki Linnakangas <heikki.linnakangas@iki.fi>
Date: Mon, 13 Jan 2014 13:42:35 +0000 (+0200)
Subject: Fix calculation of ISMN check digit.
X-Git-Tag: REL9_2_7~44
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=f6d6b42f2b1a9cbc5d1a8eb0c0d76eb27eecc0e2;p=postgresql

Fix calculation of ISMN check digit.

This has always been broken, so back-patch to all supported versions.

Fabien COELHO
---

diff --git a/contrib/isn/isn.c b/contrib/isn/isn.c
index 181bbd4072..c7e96022eb 100644
--- a/contrib/isn/isn.c
+++ b/contrib/isn/isn.c
@@ -827,7 +827,7 @@ string2ean(const char *str, bool errorOK, ean13 *result,
 		case ISMN:
 			strncpy(buf, "9790", 4);	/* this isn't for sure yet, for now
 										 * ISMN it's only 9790 */
-			valid = (valid && ((rcheck = checkdig(buf + 3, 10)) == check || magic));
+			valid = (valid && ((rcheck = checkdig(buf, 13)) == check || magic));
 			break;
 		case ISBN:
 			strncpy(buf, "978", 3);