1c4762a1bSJed Brown 2c4762a1bSJed Brown #include <petscmat.h> 3c4762a1bSJed Brown 4c4762a1bSJed Brown int main(int argc,char **argv) 5c4762a1bSJed Brown { 6c4762a1bSJed Brown Mat A, B; 7c4762a1bSJed Brown const char *pfx; 8c4762a1bSJed Brown 9*9566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc, &argv, NULL, NULL)); 10*9566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &A)); 11*9566063dSJacob Faibussowitsch PetscCall(MatSetSizes(A, 1, 1, PETSC_DECIDE, PETSC_DECIDE)); 12*9566063dSJacob Faibussowitsch PetscCall(MatSetUp(A)); 13*9566063dSJacob Faibussowitsch PetscCall(MatSetOptionsPrefix(A, "foo_")); 14*9566063dSJacob Faibussowitsch PetscCall(MatGetDiagonalBlock(A, &B)); 15c4762a1bSJed Brown /* Test set options prefix with the string obtained from get options prefix */ 16*9566063dSJacob Faibussowitsch PetscCall(PetscObjectGetOptionsPrefix((PetscObject)A,&pfx)); 17*9566063dSJacob Faibussowitsch PetscCall(MatSetOptionsPrefix(B, pfx)); 18*9566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 19c4762a1bSJed Brown 20*9566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 21b122ec5aSJacob Faibussowitsch return 0; 22c4762a1bSJed Brown } 23c4762a1bSJed Brown 24c4762a1bSJed Brown /*TEST 25c4762a1bSJed Brown 26c4762a1bSJed Brown test: 27c4762a1bSJed Brown 28c4762a1bSJed Brown TEST*/ 29