1: #include <petsc/finclude/petscdmlabel.h>
  2: module ex1f90module
  3:   use petscdm
  4:   implicit none

  6: contains
  7:   subroutine ViewLabels(dm, viewer, ierr)
  8:     type(tDM)                        :: dm
  9:     type(tPetscViewer)               :: viewer
 10:     PetscErrorCode, intent(out)      :: ierr

 12:     DMLabel                          :: label
 13:     type(tIS)                        :: labelIS
 14:     character(len=PETSC_MAX_PATH_LEN):: labelName, IObuffer
 15:     PetscInt                         :: numLabels, l

 17:     PetscCall(DMGetNumLabels(dm, numLabels, ierr))
 18:     write (IObuffer, *) 'Number of labels: ', numLabels, '\n'
 19:     PetscCall(PetscViewerASCIIPrintf(viewer, IObuffer, ierr))
 20:     do l = 0, numLabels - 1
 21:       PetscCall(DMGetLabelName(dm, l, labelName, ierr))
 22:       write (IObuffer, *) 'label ', l, ' name: ', trim(labelName), '\n'
 23:       PetscCall(PetscViewerASCIIPrintf(viewer, IObuffer, ierr))

 25:       PetscCall(PetscViewerASCIIPrintf(viewer, 'IS of values\n', ierr))
 26:       PetscCall(DMGetLabel(dm, labelName, label, ierr))
 27:       PetscCall(DMLabelGetValueIS(label, labelIS, ierr))
 28: !     PetscCall(PetscViewerASCIIPushTab(viewer,ierr))
 29:       PetscCall(ISView(labelIS, viewer, ierr))
 30: !     PetscCall(PetscViewerASCIIPopTab(viewer,ierr))
 31:       PetscCall(ISDestroy(labelIS, ierr))
 32:       PetscCall(PetscViewerASCIIPrintf(viewer, '\n', ierr))
 33:     end do

 35:     PetscCall(PetscViewerASCIIPrintf(viewer, '\n\nCell Set label IS\n', ierr))
 36:     PetscCall(DMGetLabel(dm, 'Cell Sets', label, ierr))
 37:     PetscCall(DMLabelGetValueIS(label, labelIS, ierr))
 38:     PetscCall(ISView(labelIS, viewer, ierr))
 39:     PetscCall(ISDestroy(labelIS, ierr))
 40:   end subroutine viewLabels
 41: end module ex1f90module

 43: program ex1f90
 44:   use petscdm
 45:   use ex1f90module

 47:   implicit none
 48:   type(tDM)                         :: dm, dmDist
 49:   character(len=PETSC_MAX_PATH_LEN) :: filename
 50:   PetscBool                         :: interpolate = PETSC_FALSE
 51:   PetscBool                         :: flg
 52:   PetscErrorCode                    :: ierr

 54:   PetscCallA(PetscInitialize(ierr))
 55:   PetscCallA(PetscOptionsGetString(PETSC_NULL_OPTIONS, PETSC_NULL_CHARACTER, '-i', filename, flg, ierr))
 56:   PetscCallA(PetscOptionsGetBool(PETSC_NULL_OPTIONS, PETSC_NULL_CHARACTER, '-interpolate', interpolate, flg, ierr))

 58:   PetscCallA(DMPlexCreateFromFile(PETSC_COMM_WORLD, filename, 'ex1f90_plex', interpolate, dm, ierr))
 59:   PetscCallA(DMPlexDistribute(dm, 0_PETSC_INT_KIND, PETSC_NULL_SF, dmDist, ierr))
 60:   if (.not. PetscObjectIsNull(dmDist)) then
 61:     PetscCallA(DMDestroy(dm, ierr))
 62:     dm = dmDist
 63:   end if

 65:   PetscCallA(ViewLabels(dm, PETSC_VIEWER_STDOUT_WORLD, ierr))
 66:   PetscCallA(DMDestroy(dm, ierr))
 67:   PetscCallA(PetscFinalize(ierr))
 68: end program ex1F90

 70: !/*TEST
 71: !
 72: !  test:
 73: !    suffix: 0
 74: !    args: -i ${wPETSC_DIR}/share/petsc/datafiles/meshes/blockcylinder-50.exo -interpolate
 75: !    requires: exodusii
 76: !
 77: !TEST*/