From 33fd95b8203f1ac887f13e7381a7ff124d098258 Mon Sep 17 00:00:00 2001
From: apocelipes <seve3r@outlook.com>
Date: Tue, 26 Mar 2024 06:44:26 +0000
Subject: [PATCH] encoding/asn1: simplify appendFourDigits

The new code does not need a for-loop and is easier to read.

Change-Id: Ic182d63c4779c2179b721fcfaec362681284cc16
GitHub-Last-Rev: b3ee265df7eb4d51c945bf5453eb1b09f91912d9
GitHub-Pull-Request: golang/go#63879
Reviewed-on: https://go-review.googlesource.com/c/go/+/538721
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
---
 src/encoding/asn1/marshal.go | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/src/encoding/asn1/marshal.go b/src/encoding/asn1/marshal.go
index d8c8fe17b37..69ab4f6f9e8 100644
--- a/src/encoding/asn1/marshal.go
+++ b/src/encoding/asn1/marshal.go
@@ -355,12 +355,11 @@ func appendTwoDigits(dst []byte, v int) []byte {
 }
 
 func appendFourDigits(dst []byte, v int) []byte {
-	var bytes [4]byte
-	for i := range bytes {
-		bytes[3-i] = '0' + byte(v%10)
-		v /= 10
-	}
-	return append(dst, bytes[:]...)
+	return append(dst,
+		byte('0'+(v/1000)%10),
+		byte('0'+(v/100)%10),
+		byte('0'+(v/10)%10),
+		byte('0'+v%10))
 }
 
 func outsideUTCRange(t time.Time) bool {