[#79] object: Implement Range\RangeHash requests for EC object

Signed-off-by: Anton Nikiforov <an.nikiforov@yadro.com>

object/convert.go

@@ -1962,6 +1962,8 @@ func (r *GetRangeResponseBody) ToGRPCMessage() grpc.Message {
 			m.SetChunk(v.ToGRPCMessage().(*object.GetRangeResponse_Body_Chunk))
 		case *SplitInfo:
 			m.SetSplitInfo(v.ToGRPCMessage().(*object.SplitInfo))
+		case *ECInfo:
+			m.SetECInfo(v.ToGRPCMessage().(*object.ECInfo))
 		default:
 			panic(fmt.Sprintf("unknown get range part %T", v))
 		}
@@ -1994,6 +1996,12 @@ func (r *GetRangeResponseBody) FromGRPCMessage(m grpc.Message) error {
 			r.rngPart = partSplit
 			err = partSplit.FromGRPCMessage(pt.SplitInfo)
 		}
+	case *object.GetRangeResponse_Body_EcInfo:
+		if pt != nil {
+			partEC := new(ECInfo)
+			r.rngPart = partEC
+			err = partEC.FromGRPCMessage(pt.EcInfo)
+		}
 	default:
 		err = fmt.Errorf("unknown get range part %T", pt)
 	}

object/grpc/service.go

@@ -435,6 +435,13 @@ func (m *GetRangeResponse_Body) SetSplitInfo(v *SplitInfo) {
 	}
 }
 
+// SetECInfo sets meta info about the erasure-coded object.
+func (m *GetRangeResponse_Body) SetECInfo(v *ECInfo) {
+	m.RangePart = &GetRangeResponse_Body_EcInfo{
+		EcInfo: v,
+	}
+}
+
 // SetBody sets body of the response.
 func (m *GetRangeResponse) SetBody(v *GetRangeResponse_Body) {
 	m.Body = v

object/marshal.go

@@ -117,6 +117,7 @@ const (
 
 	getRangeRespChunkField     = 1
 	getRangeRespSplitInfoField = 2
+	getRangeRespECInfoField    = 3
 
 	getRangeHashReqBodyAddressField = 1
 	getRangeHashReqBodyRangesField  = 2
@@ -1110,6 +1111,10 @@ func (r *GetRangeResponseBody) StableMarshal(buf []byte) []byte {
 		if v != nil {
 			proto.NestedStructureMarshal(getRangeRespSplitInfoField, buf, v)
 		}
+	case *ECInfo:
+		if v != nil {
+			proto.NestedStructureMarshal(getRangeRespECInfoField, buf, v)
+		}
 	default:
 		panic("unknown one of object get range request body type")
 	}
@@ -1132,6 +1137,10 @@ func (r *GetRangeResponseBody) StableSize() (size int) {
 		if v != nil {
 			size = proto.NestedStructureSize(getRangeRespSplitInfoField, v)
 		}
+	case *ECInfo:
+		if v != nil {
+			size = proto.NestedStructureSize(getRangeRespECInfoField, v)
+		}
 	default:
 		panic("unknown one of object get range request body type")
 	}