[#218] pkg/object: Add marshal operations for SplitInfo

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

pkg/object/splitinfo.go

@@ -47,3 +47,16 @@ func (s *SplitInfo) Link() *ID {
 func (s *SplitInfo) SetLink(v *ID) {
 	(*object.SplitInfo)(s).SetLink(v.ToV2())
 }
+
+func (s *SplitInfo) Marshal(b ...[]byte) ([]byte, error) {
+	var buf []byte
+	if len(b) > 0 {
+		buf = b[0]
+	}
+
+	return (*object.SplitInfo)(s).StableMarshal(buf)
+}
+
+func (s *SplitInfo) Unmarshal(data []byte) error {
+	return (*object.SplitInfo)(s).Unmarshal(data)
+}

pkg/object/splitinfo_test.go

@@ -29,6 +29,17 @@ func TestSplitInfo(t *testing.T) {
 
 		require.Equal(t, s, newS)
 	})
+
+	t.Run("marshal and unmarshal", func(t *testing.T) {
+		data, err := s.Marshal()
+		require.NoError(t, err)
+
+		newS := object.NewSplitInfo()
+
+		err = newS.Unmarshal(data)
+		require.NoError(t, err)
+		require.Equal(t, s, newS)
+	})
 }
 
 func generateID() *object.ID {

v2/object/marshal.go

@@ -629,6 +629,17 @@ func (s *SplitInfo) StableSize() (size int) {
 	return size
 }
 
+func (s *SplitInfo) Unmarshal(data []byte) error {
+	m := new(object.SplitInfo)
+	if err := goproto.Unmarshal(data, m); err != nil {
+		return err
+	}
+
+	*s = *SplitInfoFromGRPCMessage(m)
+
+	return nil
+}
+
 func (r *GetRequestBody) StableMarshal(buf []byte) ([]byte, error) {
 	if r == nil {
 		return []byte{}, nil