#include <petsc/private/fortranimpl.h>
#include <petsc/private/dmdaimpl.h>

#if defined(PETSC_HAVE_FORTRAN_CAPS)
  #define dmdagetownershipranges_  DMDAGETOWNERSHIPRANGES
  #define dmdagetneighbors_        DMDAGETNEIGHBORS
  #define dmdagetrefinementfactor_ DMDAGETREFINEMENTFACTOR
#elif !defined(PETSC_HAVE_FORTRAN_UNDERSCORE)
  #define dmdagetownershipranges_  dmdagetownershipranges
  #define dmdagetneighbors_        dmdagetneighbors
  #define dmdagetrefinementfactor_ dmdagetrefinementfactor
#endif

PETSC_EXTERN void dmdagetneighbors_(DM *da, PetscMPIInt *ranks, PetscErrorCode *ierr)
{
  const PetscMPIInt *r;
  PetscInt           n, dim;

  *ierr = DMDAGetNeighbors(*da, &r);
  if (*ierr) return;
  *ierr = DMGetDimension(*da, &dim);
  if (*ierr) return;
  if (dim == 2) n = 9;
  else n = 27;
  *ierr = PetscArraycpy(ranks, r, n);
}

PETSC_EXTERN void dmdagetownershipranges_(DM *da, PetscInt lx[], PetscInt ly[], PetscInt lz[], PetscErrorCode *ierr)
{
  const PetscInt *gx, *gy, *gz;
  PetscInt        M, N, P, i;

  CHKFORTRANNULLINTEGER(lx);
  CHKFORTRANNULLINTEGER(ly);
  CHKFORTRANNULLINTEGER(lz);
  *ierr = DMDAGetInfo(*da, 0, 0, 0, 0, &M, &N, &P, 0, 0, 0, 0, 0, 0);
  if (*ierr) return;
  *ierr = DMDAGetOwnershipRanges(*da, &gx, &gy, &gz);
  if (*ierr) return;
  if (lx) {
    for (i = 0; i < M; i++) lx[i] = gx[i];
  }
  if (ly) {
    for (i = 0; i < N; i++) ly[i] = gy[i];
  }
  if (lz) {
    for (i = 0; i < P; i++) lz[i] = gz[i];
  }
}

PETSC_EXTERN void dmdagetrefinementfactor_(DM *da, PetscInt *lx, PetscInt *ly, PetscInt *lz, PetscErrorCode *ierr)
{
  CHKFORTRANNULLINTEGER(lx);
  CHKFORTRANNULLINTEGER(ly);
  CHKFORTRANNULLINTEGER(lz);
  *ierr = DMDAGetRefinementFactor(*da, lx, ly, lz);
}