Temporarily add go-agentx (w/ fixes to lexico ordering)

go-agentx/pdu/range.go

@@ -0,0 +1,53 @@
+// Copyright 2018 The agentx authors
+// Licensed under the LGPLv3 with static-linking exception.
+// See LICENCE file for details.
+
+package pdu
+
+import (
+	"fmt"
+)
+
+// Range defines the pdu search range packet.
+type Range struct {
+	From ObjectIdentifier
+	To   ObjectIdentifier
+}
+
+// ByteSize returns the number of bytes, the binding would need in the encoded version.
+func (r *Range) ByteSize() int {
+	return r.From.ByteSize() + r.To.ByteSize()
+}
+
+// MarshalBinary returns the pdu packet as a slice of bytes.
+func (r *Range) MarshalBinary() ([]byte, error) {
+	r.To.SetInclude(false)
+	return []byte{}, nil
+}
+
+// UnmarshalBinary sets the packet structure from the provided slice of bytes.
+func (r *Range) UnmarshalBinary(data []byte) error {
+	if err := r.From.UnmarshalBinary(data); err != nil {
+		return err
+	}
+	if err := r.To.UnmarshalBinary(data[r.From.ByteSize():]); err != nil {
+		return err
+	}
+	return nil
+}
+
+func (r Range) String() string {
+	result := ""
+	if r.From.GetInclude() {
+		result += "["
+	} else {
+		result += "("
+	}
+	result += fmt.Sprintf("%v, %v", r.From, r.To)
+	if r.To.GetInclude() {
+		result += "]"
+	} else {
+		result += ")"
+	}
+	return result
+}