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cell_iterator.f03
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cell_iterator.f03
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module cell_iterator_mod
use iterator_mod
use grid_coordinate_mod
use grid_mod
implicit none
private
public :: CellIterator, AbstractCellIterator, ColumnFirstCellIterator
public :: RowFirstCellIterator, CWBorderIterator
type, extends(Iterator), abstract :: CellIterator
private
contains
procedure(next_def), deferred :: next
end type
abstract interface
function next_def(self)
import CellIterator, GridCoordinate
CLASS(CellIterator) :: self
CLASS(GridCoordinate), pointer :: next_def
end function
end interface
type, extends(CellIterator), abstract :: AbstractCellIterator
integer :: columns
integer :: rows
logical :: started
integer :: current_col
integer :: current_row
end type
type, extends(AbstractCellIterator) :: ColumnFirstCellIterator
private
contains
procedure :: hasNext => hasnext_colfirst
procedure :: next => next_colfirst
end type
interface ColumnFirstCellIterator
procedure construct_colfirst
procedure construct_colfirst_fromarray
end interface
type, extends(AbstractCellIterator) :: RowFirstCellIterator
private
contains
procedure :: hasNext => hasnext_rowfirst
procedure :: next => next_rowfirst
end type
interface RowFirstCellIterator
procedure construct_rowfirst
procedure construct_rowfirst_fromarray
end interface
type, extends(AbstractCellIterator) :: CWBorderIterator
private
contains
procedure :: hasNext => hasnext_cwborder
procedure :: next => next_cwborder
end type
interface CWBorderIterator
procedure construct_cwborder
procedure construct_cwborder_fromarray
end interface
contains
function hasnext_colfirst(self)
CLASS(ColumnFirstCellIterator), intent(in) :: self
logical :: hasnext_colfirst
hasnext_colfirst = .false.
if (.not. self%started) then
hasnext_colfirst = (self%columns>0) .and. (self%rows>0)
else
hasnext_colfirst = (self%current_row < self%rows)
if (.not. hasnext_colfirst) then
hasnext_colfirst = (self%current_row == self%rows) .and. &
& (self%current_col < self%columns)
end if
endif
end function
function next_colfirst(self)
CLASS(ColumnFirstCellIterator) :: self
CLASS(GridCoordinate), pointer :: next_colfirst
next_colfirst => NULL()
if (self%hasNext() ) then
if (self%started) then
self%current_col = self%current_col + 1
if (self%current_col > self%columns) then
self%current_col = 1
self%current_row = self%current_row + 1
end if
else
self%current_col=1
self%current_row=1
self%started = .true.
end if
next_colfirst => DefaultGridCoordinate(self%current_col, self%current_row)
end if
end function
function construct_colfirst(source_grid)
CLASS(Grid) :: source_grid
CLASS(ColumnFirstCellIterator), pointer :: construct_colfirst
ALLOCATE(construct_colfirst)
construct_colfirst%columns = source_grid%getColumns()
construct_colfirst%rows = source_grid%getRows()
construct_colfirst%started = .false.
end function
function construct_colfirst_fromarray(source_array)
real, dimension(:,:) :: source_array
TYPE(ColumnFirstCellIterator), pointer :: construct_colfirst_fromarray
integer :: rank
integer, dimension(2) :: max_idx
max_idx = shape(source_array)
rank = size(max_idx)
construct_colfirst_fromarray => NULL()
print *, 'Shape = ', max_idx
if (rank == 2) then
ALLOCATE(construct_colfirst_fromarray)
construct_colfirst_fromarray%columns = max_idx(1)
construct_colfirst_fromarray%rows = max_idx(2)
construct_colfirst_fromarray%started = .false.
construct_colfirst_fromarray%current_row = 0
construct_colfirst_fromarray%current_col = 0
end if
end function
function hasnext_rowfirst(self)
CLASS(RowFirstCellIterator), intent(in) :: self
logical :: hasnext_rowfirst
hasnext_rowfirst = .false.
print *, 'In hasnext_rowfirst()'
if (.not. self%started) then
hasnext_rowfirst = (self%columns>0) .and. (self%rows>0)
else
hasnext_rowfirst = (self%current_col < self%columns)
if (.not. hasnext_rowfirst) then
hasnext_rowfirst = (self%current_col == self%columns) .and. &
& (self%current_row < self%rows)
end if
endif
end function
function next_rowfirst(self)
CLASS(RowFirstCellIterator) :: self
CLASS(GridCoordinate), pointer :: next_rowfirst
print *, "Starting next_rowfirst()"
next_rowfirst => NULL()
if (self%hasNext() ) then
if (self%started) then
self%current_row = self%current_row + 1
if (self%current_row > self%rows) then
self%current_row = 1
self%current_col = self%current_col + 1
end if
else
self%current_col=1
self%current_row=1
self%started = .true.
end if
next_rowfirst => DefaultGridCoordinate(self%current_col, self%current_row)
if (.not. associated(next_rowfirst) ) then
print *, "failed to create (", self%current_col,", ",self%current_row,")"
else
print *, "Created coordinate"
end if
end if
end function
function construct_rowfirst(source_grid)
CLASS(Grid) :: source_grid
CLASS(RowFirstCellIterator), pointer :: construct_rowfirst
ALLOCATE(construct_rowfirst)
construct_rowfirst%columns = source_grid%getColumns()
construct_rowfirst%rows = source_grid%getRows()
construct_rowfirst%started = .false.
end function
function construct_rowfirst_fromarray(source_array)
real, dimension(:,:) :: source_array
CLASS(RowFirstCellIterator), pointer :: construct_rowfirst_fromarray
integer :: rank
integer, dimension(2) :: max_idx
max_idx = shape(source_array)
rank = size(max_idx)
construct_rowfirst_fromarray => NULL()
if (rank == 2) then
ALLOCATE(construct_rowfirst_fromarray)
construct_rowfirst_fromarray%columns = max_idx(1)
construct_rowfirst_fromarray%rows = max_idx(2)
construct_rowfirst_fromarray%started = .false.
end if
end function
function hasnext_cwborder(self)
CLASS(CWBorderIterator), INTENT(in) :: self
logical :: hasnext_cwborder
hasnext_cwborder = .not. ((self%current_col == 1) .and. (self%current_row==2))
end function
function next_cwborder(self)
CLASS(CWBorderIterator) :: self
CLASS(GridCoordinate), pointer :: next_cwborder
next_cwborder => NULL()
if (self%hasNext()) then
if (self%started) then
! check top
if (self%current_row == 1) then
self%current_col = self%current_col + 1
if (self%current_col > self%columns) then
self%current_col = self%columns
self%current_row = 2
end if
else if (self%current_col == self%columns) then
self%current_row = self%current_row + 1
if (self%current_row > self%rows) then
self%current_row = self%rows
self%current_col = self%columns-1
end if
else if (self%current_row == self%rows) then
self%current_col = self%current_col -1
if (self%current_col < 1) then
self%current_col = 1
self%current_row = self%rows-1
end if
else if (self%current_col == 1) then
self%current_row = self%current_row - 1
end if
else
self%current_row = 1
self%current_col = 1
self%started = .true.
end if
next_cwborder => DefaultGridCoordinate(self%current_col, self%current_row)
end if
end function
function construct_cwborder(source_grid)
CLASS(Grid) :: source_grid
CLASS(CWBorderIterator), pointer :: construct_cwborder
ALLOCATE(construct_cwborder)
construct_cwborder%columns = source_grid%getColumns()
construct_cwborder%rows = source_grid%getRows()
construct_cwborder%started = .false.
end function
function construct_cwborder_fromarray(source_array)
real, dimension(:,:) :: source_array
CLASS(CWBorderIterator), pointer :: construct_cwborder_fromarray
integer :: rank
integer, dimension(2) :: max_idx
max_idx = shape(source_array)
rank = size(max_idx)
construct_cwborder_fromarray => NULL()
if (rank == 2) then
ALLOCATE(construct_cwborder_fromarray)
construct_cwborder_fromarray%columns = max_idx(1)
construct_cwborder_fromarray%rows = max_idx(2)
construct_cwborder_fromarray%started = .false.
end if
end function
end module