[structs]: fixed EOF for readfrom if struct was empty

drlwe/keygen_gal.go

@@ -286,7 +286,7 @@ func (share *GKGShare) WriteTo(w io.Writer) (n int64, err error) {
 
 		n += inc2
 
-		return
+		return n, err
 
 	default:
 		return share.WriteTo(bufio.NewWriter(w))

rlwe/evaluationkeyset.go

@@ -149,7 +149,7 @@ func (evk *EvaluationKeySet) WriteTo(w io.Writer) (int64, error) {
 			n += int64(inc)
 		}
 
-		return n, nil
+		return n, w.Flush()
 
 	default:
 		return evk.WriteTo(bufio.NewWriter(w))

utils/structs/matrix.go

@@ -90,7 +90,7 @@ func (m Matrix[T]) WriteTo(w io.Writer) (int64, error) {
 			}
 		}
 
-		return n, nil
+		return n, w.Flush()
 
 	default:
 		return m.WriteTo(bufio.NewWriter(w))
@@ -112,7 +112,7 @@ func (m *Matrix[T]) ReadFrom(r io.Reader) (int64, error) {
 		var size, n int
 
 		if n, err = buffer.ReadInt(r, &size); err != nil {
-			return int64(n), fmt.Errorf("cannot ReadFrom: size: %w", err)
+			return int64(n), fmt.Errorf("cannot buffer.ReadInt: size: %w", err)
 		}
 
 		if len(*m) != size {
@@ -127,7 +127,7 @@ func (m *Matrix[T]) ReadFrom(r io.Reader) (int64, error) {
 
 			var inc int
 			if inc, err = buffer.ReadInt(r, &size); err != nil {
-				return int64(n), fmt.Errorf("cannot ReadFrom: size: %w", err)
+				return int64(n), fmt.Errorf("cannot buffer.ReadInt: size: %w", err)
 			}
 
 			n += inc
@@ -144,6 +144,7 @@ func (m *Matrix[T]) ReadFrom(r io.Reader) (int64, error) {
 
 				var inc int64
 				if inc, err = codec.ReadFromWrapper(r, mi[i][j]); err != nil {
+
 					return int64(n) + inc, err
 				}
 

utils/structs/vector.go

@@ -78,7 +78,7 @@ func (v *Vector[T]) WriteTo(w io.Writer) (int64, error) {
 			n += inc
 		}
 
-		return n, nil
+		return n, w.Flush()
 
 	default:
 		return v.WriteTo(bufio.NewWriter(w))