1 static char help[] = "Test MatNullSpaceTest() with options prefixes.\n\n";
2
3 #include <petscmat.h>
4
main(int argc,char ** argv)5 int main(int argc, char **argv)
6 {
7 Mat mat;
8 MatNullSpace nsp;
9 PetscBool prefix = PETSC_FALSE, flg;
10 PetscInt zero = 0;
11 PetscScalar value = 0;
12
13 PetscFunctionBeginUser;
14 PetscCall(PetscInitialize(&argc, &argv, NULL, help));
15 PetscCall(PetscOptionsGetBool(NULL, NULL, "-with_prefix", &prefix, NULL));
16 PetscCall(MatCreateDense(PETSC_COMM_WORLD, 1, 1, 1, 1, NULL, &mat));
17 PetscCall(MatSetOptionsPrefix(mat, prefix ? "prefix_" : NULL));
18 PetscCall(MatSetUp(mat));
19 PetscCall(MatSetValues(mat, 1, &zero, 1, &zero, &value, INSERT_VALUES));
20 PetscCall(MatAssemblyBegin(mat, MAT_FINAL_ASSEMBLY));
21 PetscCall(MatAssemblyEnd(mat, MAT_FINAL_ASSEMBLY));
22 PetscCall(MatNullSpaceCreate(PETSC_COMM_WORLD, PETSC_TRUE, 0, NULL, &nsp));
23 PetscCall(MatNullSpaceTest(nsp, mat, &flg));
24 PetscCheck(flg, PETSC_COMM_WORLD, PETSC_ERR_PLIB, "Null space test failed!");
25 PetscCall(MatNullSpaceDestroy(&nsp));
26 PetscCall(MatDestroy(&mat));
27 PetscCall(PetscFinalize());
28 return 0;
29 }
30
31 /*TEST
32
33 test:
34 suffix: no_prefix
35 output_file: output/ex227_no_prefix.out
36 args: -mat_null_space_test_view -mat_view
37
38 test:
39 suffix: prefix
40 output_file: output/ex227_prefix.out
41 args: -prefix_mat_null_space_test_view -with_prefix -prefix_mat_view
42
43 TEST*/
44