From 71e5c8dfa7395997fdc0c2464f539088d7274add Mon Sep 17 00:00:00 2001
From: ucwong <ucwong@126.com>
Date: Sat, 10 Jun 2023 20:33:47 +0800
Subject: [PATCH] safe copy

---
 common/util.go | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/common/util.go b/common/util.go
index b5dd598..20967ac 100644
--- a/common/util.go
+++ b/common/util.go
@@ -15,6 +15,16 @@
 
 package common
 
+//func SafeCopy(des, src []byte) []byte {
+//	return append(des[:0], src...)
+//}
+
 func SafeCopy(des, src []byte) []byte {
-	return append(des[:0], src...)
+	if len(des) < len(src) {
+		des = make([]byte, len(src))
+	} else {
+		des = des[:len(src)]
+	}
+	copy(des, src)
+	return des
 }