From 4bc4757404253abb168f86bc49edbe6d36b11eb6 Mon Sep 17 00:00:00 2001
From: Kevin Backhouse <kevinbackhouse@github.com>
Date: Fri, 15 Oct 2021 21:55:22 +0100
Subject: [PATCH] Credit to OSS-Fuzz:
 https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=39555 Remove bogus
 code.

---
 xmpsdk/src/XMPUtils.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/xmpsdk/src/XMPUtils.cpp b/xmpsdk/src/XMPUtils.cpp
index af41c187..89afd3d6 100644
--- a/xmpsdk/src/XMPUtils.cpp
+++ b/xmpsdk/src/XMPUtils.cpp
@@ -174,8 +174,8 @@ XMP_VarString * sExtendedDigest = 0;
 static bool
 IsLeapYear ( long year )
 {
-
-	if ( year < 0 ) year = -year + 1;		// Fold the negative years, assuming there is a year 0.
+	// This code uses the Gregorian calendar algorithm:
+	// https://en.wikipedia.org/wiki/Leap_year#Algorithm
 
 	if ( (year % 4) != 0 ) return false;	// Not a multiple of 4.
 	if ( (year % 100) != 0 ) return true;	// A multiple of 4 but not a multiple of 100.