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

go-agentx/pdu/variables.go

@@ -0,0 +1,56 @@
+// Copyright 2018 The agentx authors
+// Licensed under the LGPLv3 with static-linking exception.
+// See LICENCE file for details.
+
+package pdu
+
+import (
+	"strings"
+
+	"github.com/posteo/go-agentx/value"
+)
+
+// Variables defines a list of variable bindings.
+type Variables []Variable
+
+// Add adds the provided variable.
+func (v *Variables) Add(oid value.OID, t VariableType, value interface{}) {
+	variable := Variable{}
+	variable.Set(oid, t, value)
+	*v = append(*v, variable)
+}
+
+// MarshalBinary returns the pdu packet as a slice of bytes.
+func (v *Variables) MarshalBinary() ([]byte, error) {
+	result := []byte{}
+	for _, variable := range *v {
+		data, err := variable.MarshalBinary()
+		if err != nil {
+			return nil, err
+		}
+		result = append(result, data...)
+	}
+	return result, nil
+}
+
+// UnmarshalBinary sets the packet structure from the provided slice of bytes.
+func (v *Variables) UnmarshalBinary(data []byte) error {
+	*v = make([]Variable, 0)
+	for offset := 0; offset < len(data); {
+		variable := Variable{}
+		if err := variable.UnmarshalBinary(data[offset:]); err != nil {
+			return err
+		}
+		*v = append(*v, variable)
+		offset += variable.ByteSize()
+	}
+	return nil
+}
+
+func (v Variables) String() string {
+	parts := make([]string, len(v))
+	for index, va := range v {
+		parts[index] = va.String()
+	}
+	return "[variables " + strings.Join(parts, ", ") + "]"
+}