Account for properties when a and/or b are 0:
gcd(0, 0) = 0
gcd(a, 0) = a
gcd(0, b) = b
Cc: sta...@vger.kernel.org
Signed-off-by: Davidlohr Bueso <d...@gnu.org>
---
lib/gcd.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/lib/gcd.c b/lib/gcd.c
index cce4f3c..7e163c6 100644
--- a/lib/gcd.c
+++ b/lib/gcd.c
@@ -7,6 +7,9 @@ unsigned long gcd(unsigned long a, unsigned long b)
{
unsigned long r;
+ if (!a || !b)
+ return a | b;
+
if (a < b)
swap(a, b);
while ((r = a % b) != 0) {
--
1.7.9.5
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