10   PetscViewer fd;  in main()  local
21   PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD, file, FILE_MODE_READ, &fd));  in main()
28   PetscCall(MatLoad(A, fd));  in main()
29   PetscCall(PetscViewerDestroy(&fd));  in main()
34   PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD, "fileoutput", FILE_MODE_WRITE, &fd));  in main()
35   PetscCall(PetscViewerBinarySetFlowControl(fd, 3));  in main()
39   PetscCall(MatView(A, fd));  in main()
40   PetscCall(PetscViewerDestroy(&fd));  in main()
43   PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD, "fileoutput", FILE_MODE_READ, &fd));  in main()
46   PetscCall(MatLoad(B, fd));  in main()
47   PetscCall(PetscViewerDestroy(&fd));  in main()