package storagegroup import ( "github.com/nspcc-dev/neofs-api-go/util/proto" ) const ( sizeField = 1 hashField = 2 expirationField = 3 objectIDsField = 4 ) // StableMarshal marshals unified storage group structure in a protobuf // compatible way without field order shuffle. func (s *StorageGroup) StableMarshal(buf []byte) ([]byte, error) { if s == nil { return []byte{}, nil } if buf == nil { buf = make([]byte, s.StableSize()) } var ( offset, n int err error ) n, err = proto.UInt64Marshal(sizeField, buf[offset:], s.size) if err != nil { return nil, err } offset += n n, err = proto.BytesMarshal(hashField, buf[offset:], s.hash) if err != nil { return nil, err } offset += n n, err = proto.UInt64Marshal(expirationField, buf[offset:], s.exp) if err != nil { return nil, err } offset += n for i := range s.members { n, err = proto.NestedStructureMarshal(objectIDsField, buf[offset:], s.members[i]) if err != nil { return nil, err } offset += n } return buf, nil } // StableSize of storage group structure marshalled by StableMarshal function. func (s *StorageGroup) StableSize() (size int) { if s == nil { return 0 } size += proto.UInt64Size(sizeField, s.size) size += proto.BytesSize(hashField, s.hash) size += proto.UInt64Size(expirationField, s.exp) for i := range s.members { size += proto.NestedStructureSize(objectIDsField, s.members[i]) } return size }