1c4762a1bSJed Brown 2c4762a1bSJed Brown #include <petscmat.h> 3c4762a1bSJed Brown 4*d71ae5a4SJacob Faibussowitsch int main(int argc, char **argv) 5*d71ae5a4SJacob Faibussowitsch { 6c4762a1bSJed Brown Mat A, B; 7c4762a1bSJed Brown const char *pfx; 8c4762a1bSJed Brown 9327415f7SBarry Smith PetscFunctionBeginUser; 109566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc, &argv, NULL, NULL)); 119566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &A)); 129566063dSJacob Faibussowitsch PetscCall(MatSetSizes(A, 1, 1, PETSC_DECIDE, PETSC_DECIDE)); 139566063dSJacob Faibussowitsch PetscCall(MatSetUp(A)); 149566063dSJacob Faibussowitsch PetscCall(MatSetOptionsPrefix(A, "foo_")); 159566063dSJacob Faibussowitsch PetscCall(MatGetDiagonalBlock(A, &B)); 16c4762a1bSJed Brown /* Test set options prefix with the string obtained from get options prefix */ 179566063dSJacob Faibussowitsch PetscCall(PetscObjectGetOptionsPrefix((PetscObject)A, &pfx)); 189566063dSJacob Faibussowitsch PetscCall(MatSetOptionsPrefix(B, pfx)); 199566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 20c4762a1bSJed Brown 219566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 22b122ec5aSJacob Faibussowitsch return 0; 23c4762a1bSJed Brown } 24c4762a1bSJed Brown 25c4762a1bSJed Brown /*TEST 26c4762a1bSJed Brown 27c4762a1bSJed Brown test: 28c4762a1bSJed Brown 29c4762a1bSJed Brown TEST*/ 30