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