From: Sergey Matveev <stargrave@stargrave.org>
Date: Tue, 14 Jan 2025 10:20:55 +0000 (+0300)
Subject: Do not modify big.Int during encoding
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=f71a0018f2f8e562a2fc4d8fe08d56c6fa19d1c8bbbb0209bb91618bfdd10f66;p=keks.git

Do not modify big.Int during encoding
---

diff --git a/go/atom-encode.go b/go/atom-encode.go
index 4c5876a..d69a46e 100644
--- a/go/atom-encode.go
+++ b/go/atom-encode.go
@@ -100,9 +100,8 @@ func BigIntEncode(w io.Writer, v *big.Int) (written int64, err error) {
 	if v.Sign() >= 0 {
 		_, err = w.Write([]byte{byte(AtomPInt)})
 	} else {
-		n1 := big.NewInt(-1)
-		v = v.Abs(v)
-		v = v.Add(v, n1)
+		n := new(big.Int).Abs(v)
+		v = n.Sub(n, big.NewInt(1))
 		_, err = w.Write([]byte{byte(AtomNInt)})
 	}
 	if err != nil {