1c4762a1bSJed Brown #include <petscmat.h> 2c4762a1bSJed Brown 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*/ 30