1c4762a1bSJed Brown 2c4762a1bSJed Brown #include <petscmat.h> 3c4762a1bSJed Brown 4c4762a1bSJed Brown int main(int argc,char **argv) 5c4762a1bSJed Brown { 6c4762a1bSJed Brown PetscErrorCode ierr; 7c4762a1bSJed Brown Mat A, B; 8c4762a1bSJed Brown const char *pfx; 9c4762a1bSJed Brown 10c4762a1bSJed Brown ierr = PetscInitialize(&argc, &argv, NULL, NULL);if (ierr) return ierr; 11*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreate(PETSC_COMM_WORLD, &A)); 12*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetSizes(A, 1, 1, PETSC_DECIDE, PETSC_DECIDE)); 13*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetUp(A)); 14*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetOptionsPrefix(A, "foo_")); 15*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetDiagonalBlock(A, &B)); 16c4762a1bSJed Brown /* Test set options prefix with the string obtained from get options prefix */ 17*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscObjectGetOptionsPrefix((PetscObject)A,&pfx)); 18*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetOptionsPrefix(B, pfx)); 19*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&A)); 20c4762a1bSJed Brown 21c4762a1bSJed Brown ierr = PetscFinalize(); 22c4762a1bSJed Brown return ierr; 23c4762a1bSJed Brown } 24c4762a1bSJed Brown 25c4762a1bSJed Brown /*TEST 26c4762a1bSJed Brown 27c4762a1bSJed Brown test: 28c4762a1bSJed Brown 29c4762a1bSJed Brown TEST*/ 30