v1.0.0

transport/internet/kcp/xor.go

@@ -0,0 +1,17 @@
+// +build !amd64
+
+package kcp
+
+// xorfwd performs XOR forwards in words, x[i] ^= x[i-4], i from 0 to len
+func xorfwd(x []byte) {
+	for i := 4; i < len(x); i++ {
+		x[i] ^= x[i-4]
+	}
+}
+
+// xorbkd performs XOR backwords in words, x[i] ^= x[i-4], i from len to 0
+func xorbkd(x []byte) {
+	for i := len(x) - 1; i >= 4; i-- {
+		x[i] ^= x[i-4]
+	}
+}