2: static char help[] = "Tests Vec/MatSetValues() with negative row and column indices.\n\n";

  4: #include <petscmat.h>
  5: #include <petscpc.h>

  9: int main(int argc,char **args)
 10: {
 11:   Mat            C;
 12:   PetscInt       i[2],j[2];
 14:   PetscScalar    v[] = {1.0,2.0,3.0,4.0};
 15:   Vec            x;

 17:   PetscInitialize(&argc,&args,(char*)0,help);

 19:   MatCreate(PETSC_COMM_WORLD,&C);
 20:   MatSetSizes(C,PETSC_DECIDE,PETSC_DECIDE,3,3);
 21:   MatSetFromOptions(C);
 22:   VecCreateSeq(PETSC_COMM_WORLD,3,&x);

 24:   i[0] = 1; i[1] = -1; j[0] = 1; j[1] = 2;
 25:   MatSetValues(C,2,i,2,j,v,INSERT_VALUES);
 26:   MatSetValues(C,2,j,2,i,v,INSERT_VALUES);
 27:   VecSetValues(x,2,i,v,INSERT_VALUES);

 29:   MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY);
 30:   MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY);

 32:   MatView(C,PETSC_VIEWER_STDOUT_WORLD);
 33:   VecView(x,PETSC_VIEWER_STDOUT_WORLD);

 35:   VecDestroy(&x);
 36:   MatDestroy(&C);

 38:   PetscFinalize();
 39:   return 0;
 40: }