Add protobuf preparation objects, guarded by proto tag

pkg/api/unversioned/time_proto.go

@@ -0,0 +1,80 @@
+// +build proto
+
+/*
+Copyright 2015 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package unversioned
+
+import (
+	"time"
+)
+
+// ProtoTime is a struct that is equivalent to Time, but intended for
+// protobuf marshalling/unmarshalling. It is generated into a serialization
+// that matches Time. Do not use in Go structs.
+type ProtoTime struct {
+	// Represents the time of an event.
+	Timestamp Timestamp `json:"timestamp"`
+}
+
+// Timestamp is a protobuf Timestamp compatible representation of time.Time
+type Timestamp struct {
+	// Represents seconds of UTC time since Unix epoch
+	// 1970-01-01T00:00:00Z. Must be from from 0001-01-01T00:00:00Z to
+	// 9999-12-31T23:59:59Z inclusive.
+	Seconds int64 `json:"seconds"`
+	// Non-negative fractions of a second at nanosecond resolution. Negative
+	// second values with fractions must still have non-negative nanos values
+	// that count forward in time. Must be from 0 to 999,999,999
+	// inclusive.
+	Nanos int32 `json:"nanos"`
+}
+
+// ProtoTime returns the Time as a new ProtoTime value.
+func (m *Time) ProtoTime() *ProtoTime {
+	if m == nil {
+		return &ProtoTime{}
+	}
+	return &ProtoTime{
+		Timestamp: Timestamp{
+			Seconds: m.Time.Unix(),
+			Nanos:   int32(m.Time.Nanosecond()),
+		},
+	}
+}
+
+// Size implements the protobuf marshalling interface.
+func (m *Time) Size() (n int) { return m.ProtoTime().Size() }
+
+// Reset implements the protobuf marshalling interface.
+func (m *Time) Unmarshal(data []byte) error {
+	p := ProtoTime{}
+	if err := p.Unmarshal(data); err != nil {
+		return err
+	}
+	m.Time = time.Unix(p.Timestamp.Seconds, int64(p.Timestamp.Nanos))
+	return nil
+}
+
+// Marshal implements the protobuf marshalling interface.
+func (m *Time) Marshal() (data []byte, err error) {
+	return m.ProtoTime().Marshal()
+}
+
+// MarshalTo implements the protobuf marshalling interface.
+func (m *Time) MarshalTo(data []byte) (int, error) {
+	return m.ProtoTime().MarshalTo(data)
+}