1c4762a1bSJed Brown static char help[] = "Tests MatDiagonalSet() on MatLoad() matrix \n\n";
2c4762a1bSJed Brown
3c4762a1bSJed Brown #include <petscmat.h>
4c4762a1bSJed Brown
main(int argc,char ** args)5d71ae5a4SJacob Faibussowitsch int main(int argc, char **args)
6d71ae5a4SJacob Faibussowitsch {
7c4762a1bSJed Brown Mat A;
8c4762a1bSJed Brown Vec x;
9c4762a1bSJed Brown PetscViewer fd; /* viewer */
10c4762a1bSJed Brown char file[PETSC_MAX_PATH_LEN]; /* input file name */
11c4762a1bSJed Brown PetscReal norm;
12c4762a1bSJed Brown PetscBool flg;
13c4762a1bSJed Brown
14327415f7SBarry Smith PetscFunctionBeginUser;
15*c8025a54SPierre Jolivet PetscCall(PetscInitialize(&argc, &args, NULL, help));
16c4762a1bSJed Brown /* Determine file from which we read the matrix A */
179566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetString(NULL, NULL, "-f", file, sizeof(file), &flg));
1828b400f6SJacob Faibussowitsch PetscCheck(flg, PETSC_COMM_WORLD, PETSC_ERR_USER, "Must indicate binary file with the -f option");
19c4762a1bSJed Brown
20c4762a1bSJed Brown /* Load matrix A */
219566063dSJacob Faibussowitsch PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD, file, FILE_MODE_READ, &fd));
229566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &A));
23f4747e26SJunchao Zhang PetscCall(MatSetFromOptions(A));
249566063dSJacob Faibussowitsch PetscCall(MatLoad(A, fd));
259566063dSJacob Faibussowitsch PetscCall(PetscViewerDestroy(&fd));
269566063dSJacob Faibussowitsch PetscCall(MatCreateVecs(A, &x, NULL));
279566063dSJacob Faibussowitsch PetscCall(MatGetDiagonal(A, x));
289566063dSJacob Faibussowitsch PetscCall(VecScale(x, -1.0));
299566063dSJacob Faibussowitsch PetscCall(MatDiagonalSet(A, x, ADD_VALUES));
309566063dSJacob Faibussowitsch PetscCall(MatGetDiagonal(A, x));
319566063dSJacob Faibussowitsch PetscCall(VecNorm(x, NORM_2, &norm));
329566063dSJacob Faibussowitsch PetscCall(PetscPrintf(PETSC_COMM_WORLD, "Norm %g\n", (double)norm));
33c4762a1bSJed Brown
34c4762a1bSJed Brown /* Free data structures */
359566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A));
369566063dSJacob Faibussowitsch PetscCall(VecDestroy(&x));
379566063dSJacob Faibussowitsch PetscCall(PetscFinalize());
38b122ec5aSJacob Faibussowitsch return 0;
39c4762a1bSJed Brown }
40c4762a1bSJed Brown
41c4762a1bSJed Brown /*TEST
42c4762a1bSJed Brown
43f4747e26SJunchao Zhang testset:
44c4762a1bSJed Brown nsize: 4
45dfd57a17SPierre Jolivet requires: datafilespath !complex double !defined(PETSC_USE_64BIT_INDICES)
46c4762a1bSJed Brown args: -f ${wPETSC_DIR}/share/petsc/datafiles/matrices/ns-real-int32-float64 -malloc_dump
47f4747e26SJunchao Zhang output_file: output/ex171_1.out
48f4747e26SJunchao Zhang
49f4747e26SJunchao Zhang test:
50f4747e26SJunchao Zhang suffix: 1
51f4747e26SJunchao Zhang args: -mat_type aij
52f4747e26SJunchao Zhang
53f4747e26SJunchao Zhang test:
54f4747e26SJunchao Zhang suffix: 2
55f4747e26SJunchao Zhang requires: kokkos_kernels
56f4747e26SJunchao Zhang args: -mat_type aijkokkos
57c4762a1bSJed Brown
58c4762a1bSJed Brown TEST*/
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