Actual source code: ex227.c
1: static char help[] = "Test MatNullSpaceTest() with options prefixes.\n\n";
3: #include <petscmat.h>
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: PetscFunctionBeginUser;
13: 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: }
31: /*TEST
33: test:
34: suffix: no_prefix
35: output_file: output/ex227_no_prefix.out
36: args: -mat_null_space_test_view -mat_view
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
43: TEST*/