static const char help[] = "Test DMDAGetOwnershipRanges()\n";

#include <petscdm.h>
#include <petscdmda.h>

int main(int argc, char *argv[])
{
  DM              da;
  PetscViewer     vw;
  PetscInt        dim = 2, m, n, p;
  const PetscInt *lx, *ly, *lz;
  PetscMPIInt     rank;

  PetscFunctionBeginUser;
  PetscCall(PetscInitialize(&argc, &argv, 0, help));
  PetscCall(PetscOptionsGetInt(NULL, 0, "-dim", &dim, 0));
  switch (dim) {
  case 2:
    PetscCall(DMDACreate2d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE, DMDA_STENCIL_STAR, 3, 5, PETSC_DECIDE, PETSC_DECIDE, 2, 1, NULL, NULL, &da));
    break;
  case 3:
    PetscCall(DMDACreate3d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE, DMDA_STENCIL_STAR, 3, 5, 7, PETSC_DECIDE, PETSC_DECIDE, PETSC_DECIDE, 2, 1, NULL, NULL, NULL, &da));
    break;
  default:
    SETERRQ(PETSC_COMM_WORLD, PETSC_ERR_SUP, "No support for %" PetscInt_FMT " dimensions", dim);
  }
  PetscCall(DMSetFromOptions(da));
  PetscCall(DMSetUp(da));
  PetscCall(DMDAGetInfo(da, 0, 0, 0, 0, &m, &n, &p, 0, 0, 0, 0, 0, 0));
  PetscCall(DMDAGetOwnershipRanges(da, &lx, &ly, &lz));
  PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank));

  PetscCall(PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &vw));
  PetscCall(PetscViewerASCIIPrintf(vw, "[%d] lx ly%s\n", rank, dim > 2 ? " lz" : ""));
  PetscCall(PetscIntView(m, lx, vw));
  PetscCall(PetscIntView(n, ly, vw));
  if (dim > 2) PetscCall(PetscIntView(n, lz, vw));
  PetscCall(PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &vw));
  PetscCall(DMDestroy(&da));
  PetscCall(PetscFinalize());
  return 0;
}

/*TEST

   test:
      nsize: 12
      args: -dm_view -dim 3 -da_grid_x 11 -da_grid_y 5 -da_grid_z 7

TEST*/