1c4762a1bSJed Brown #include <petscmat.h>
2c4762a1bSJed Brown
main(int argc,char ** argv)3d71ae5a4SJacob Faibussowitsch int main(int argc, char **argv)
4d71ae5a4SJacob Faibussowitsch {
5c4762a1bSJed Brown Mat A, B;
6c4762a1bSJed Brown const char *pfx;
7c4762a1bSJed Brown
8327415f7SBarry Smith PetscFunctionBeginUser;
99566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc, &argv, NULL, NULL));
109566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &A));
119566063dSJacob Faibussowitsch PetscCall(MatSetSizes(A, 1, 1, PETSC_DECIDE, PETSC_DECIDE));
129566063dSJacob Faibussowitsch PetscCall(MatSetUp(A));
139566063dSJacob Faibussowitsch PetscCall(MatSetOptionsPrefix(A, "foo_"));
149566063dSJacob Faibussowitsch PetscCall(MatGetDiagonalBlock(A, &B));
15c4762a1bSJed Brown /* Test set options prefix with the string obtained from get options prefix */
169566063dSJacob Faibussowitsch PetscCall(PetscObjectGetOptionsPrefix((PetscObject)A, &pfx));
179566063dSJacob Faibussowitsch PetscCall(MatSetOptionsPrefix(B, pfx));
189566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A));
19c4762a1bSJed Brown
209566063dSJacob Faibussowitsch PetscCall(PetscFinalize());
21b122ec5aSJacob Faibussowitsch return 0;
22c4762a1bSJed Brown }
23c4762a1bSJed Brown
24c4762a1bSJed Brown /*TEST
25c4762a1bSJed Brown
26c4762a1bSJed Brown test:
27*3886731fSPierre Jolivet output_file: output/empty.out
28c4762a1bSJed Brown
29c4762a1bSJed Brown TEST*/
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