Merging the new branch

BasicSolver/3D-mpi/src/vtkWriter.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2022 NHR@FAU, University Erlangen-Nuremberg.
+ * Copyright (C) NHR@FAU, University Erlangen-Nuremberg.
  * All rights reserved. This file is part of nusif-solver.
  * Use of this source code is governed by a MIT style
  * license that can be found in the LICENSE file.
@@ -12,13 +12,15 @@
 #include "grid.h"
 
 typedef enum VtkFormat { ASCII = 0, BINARY } VtkFormat;
-typedef enum VtkMode { UNIX = 0, MPI } VtkMode;
 
 typedef struct VtkOptions {
-    VtkFormat fmt;
-    VtkMode mode;
     Grid grid;
+#ifdef _VTK_WRITER_MPI
+    MPI_File fh;
+#else
     FILE* fh;
+    VtkFormat fmt;
+#endif // _VTK_WRITER_MPI
     Comm comm;
 } VtkOptions;