From e9f89c46e09c0b33ea5e64963e2a5034e19dda73 Mon Sep 17 00:00:00 2001
From: Owen Anderson <resistor@mac.com>
Date: Thu, 27 Jul 2023 23:41:25 -0600
Subject: [PATCH] Use `rotate_right` instead of explicit expansion.

---
 src/uu/sum/src/sum.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/uu/sum/src/sum.rs b/src/uu/sum/src/sum.rs
index 0ea415b13..e9b5a8e07 100644
--- a/src/uu/sum/src/sum.rs
+++ b/src/uu/sum/src/sum.rs
@@ -34,7 +34,7 @@ fn bsd_sum(mut reader: Box<dyn Read>) -> (usize, u16) {
             Ok(n) if n != 0 => {
                 bytes_read += n;
                 for &byte in buf[..n].iter() {
-                    checksum = (checksum >> 1) + ((checksum & 1) << 15);
+                    checksum = checksum.rotate_right(1);
                     checksum = checksum.wrapping_add(u16::from(byte));
                 }
             }