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!
! This file contains Fortran90 interfaces for H5S functions.
! 
      MODULE H5S
        USE H5GLOBAL
 
        CONTAINS
          
!----------------------------------------------------------------------
! Name:		h5screate_simple_f 
!
! Purpose: 	Creates a new simple data space and opens it for access	.
!
! Inputs:  
!		rank		- number of dimensions
!		dims		- an array of the size of each dimension
! Outputs:  
!		space_id	- dataspace identifier
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!		maxdims		- an array of the maximum size of each 
!				  dimension
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------
          SUBROUTINE h5screate_simple_f(rank, dims, space_id, hdferr, maxdims) 

            IMPLICIT NONE
            INTEGER, INTENT(IN) :: rank     ! Number of dataspace dimensions 
            INTEGER(HSIZE_T), INTENT(IN) :: dims(rank) 
                                                    ! Array with the dimension 
                                                    ! sizes 
            INTEGER(HID_T), INTENT(OUT) :: space_id ! Dataspace identifier 
            INTEGER, INTENT(OUT) :: hdferr          ! Error code
            INTEGER(HSIZE_T), OPTIONAL, INTENT(IN) :: maxdims(rank) 
                                                    ! Array with the maximum 
                                                    ! dimension sizes 
            INTEGER(HSIZE_T), ALLOCATABLE, DIMENSION(:) :: f_maxdims

!            INTEGER, EXTERNAL :: h5screate_simple_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5screate_simple_c(rank, dims, maxdims, space_id)
              USE H5GLOBAL
              !MS$ATTRIBUTES C,reference,alias:'_H5SCREATE_SIMPLE_C'::h5screate_simple_c
              INTEGER, INTENT(IN) :: rank
              INTEGER(HSIZE_T), INTENT(IN) :: dims(rank)
              INTEGER(HSIZE_T), DIMENSION(:),INTENT(IN) :: maxdims(rank)
              INTEGER(HID_T), INTENT(OUT) :: space_id
              END FUNCTION h5screate_simple_c
            END INTERFACE
            
            allocate (f_maxdims(rank), stat=hdferr)
            if (hdferr .NE. 0) then 
                hdferr = -1
                return
            endif 
            if (present(maxdims)) then 
                f_maxdims = maxdims 
            else
                f_maxdims = dims
            endif 
            hdferr = h5screate_simple_c(rank, dims, f_maxdims, space_id)
            deallocate(f_maxdims)

          END SUBROUTINE h5screate_simple_f
          
!----------------------------------------------------------------------
! Name:		h5sclose_f 
!
! Purpose: 	Releases and terminates access to a dataspace.	
!
! Inputs:  
!		space_id	- identifier of dataspace to release
! Outputs:  
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------

          SUBROUTINE h5sclose_f(space_id, hdferr)

            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: space_id ! Dataspace identifier
            INTEGER, INTENT(OUT) :: hdferr         ! Error code

!            INTEGER, EXTERNAL :: h5sclose_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5sclose_c(space_id)
              USE H5GLOBAL
              !MS$ATTRIBUTES C,reference,alias:'_H5SCLOSE_C'::h5sclose_c
              INTEGER(HID_T), INTENT(IN) :: space_id
              END FUNCTION h5sclose_c
            END INTERFACE

            hdferr = h5sclose_c(space_id)

          END SUBROUTINE h5sclose_f

!----------------------------------------------------------------------
! Name:		h5screate_f 
!
! Purpose: 	Creates a new dataspace of a specified type. 	
!
! Inputs:  
!		classtype	- the type of the dataspace to be created
! Outputs:  
!		space_id	- dataspace identifier
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------

          SUBROUTINE h5screate_f(classtype, space_id, hdferr) 

            IMPLICIT NONE
            INTEGER, INTENT(IN) :: classtype     ! The type of the dataspace
                                                 ! to be created. 
                                                 ! Possible values are:
                                                 !  H5S_SCALAR_F (0)
                                                 !  H5S_SIMPLE_F(1)
            INTEGER(HID_T), INTENT(OUT) :: space_id ! Dataspace identifier 
            INTEGER, INTENT(OUT) :: hdferr          ! Error code

!            INTEGER, EXTERNAL :: h5screate_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5screate_c(classtype, space_id)
              USE H5GLOBAL
              !MS$ATTRIBUTES C,reference,alias:'_H5SCREATE_C'::h5screate_c
              INTEGER, INTENT(IN) :: classtype
              INTEGER(HID_T), INTENT(OUT) :: space_id
              END FUNCTION h5screate_c
            END INTERFACE

            hdferr = h5screate_c(classtype, space_id)

          END SUBROUTINE h5screate_f

!----------------------------------------------------------------------
! Name:		h5scopy_f 
!
! Purpose: 	Creates an exact copy of a dataspace.	
!
! Inputs:  
!		space_id	- dataspace identifier
! Outputs:  
!		new_space_id	- identifier of dataspace's copy
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------

          SUBROUTINE h5scopy_f(space_id, new_space_id, hdferr) 

            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: space_id ! Dataspace identifier 
            INTEGER(HID_T), INTENT(OUT) :: new_space_id 
                                             ! Identifier of dataspace's copy 
            INTEGER, INTENT(OUT) :: hdferr   ! Error code

!            INTEGER, EXTERNAL :: h5scopy_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5scopy_c(space_id, new_space_id)  
              USE H5GLOBAL
              !MS$ATTRIBUTES C,reference,alias:'_H5SCOPY_C'::h5scopy_c
              INTEGER(HID_T), INTENT(IN) :: space_id
              INTEGER(HID_T), INTENT(OUT):: new_space_id
              END FUNCTION h5scopy_c
            END INTERFACE

            hdferr = h5scopy_c(space_id, new_space_id)
 
          END SUBROUTINE h5scopy_f

!----------------------------------------------------------------------
! Name:		h5sget_select_hyper_nblocks_f 
!
! Purpose: 	Get number of hyperslab blocks.	
!
! Inputs:  
!		space_id	- dataspace identifier
! Outputs:  
!		num_blocks	- number of hyperslab blocks in the current
!				  hyperslab selection
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------
          SUBROUTINE h5sget_select_hyper_nblocks_f(space_id, num_blocks, hdferr) 

            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: space_id ! Dataspace identifier 
            INTEGER(HSSIZE_T), INTENT(OUT) :: num_blocks 
                                             !number of hyperslab blocks 
                                             !in the current dataspace 
                                             !selection 
            INTEGER, INTENT(OUT) :: hdferr   ! Error code

!            INTEGER, EXTERNAL :: h5sget_select_hyper_nblocks_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5sget_select_hyper_nblocks_c (space_id, num_blocks)
              USE H5GLOBAL
!MS$ATTRIBUTES C,reference,alias:'_H5SGET_SELECT_HYPER_NBLOCKS_C'::h5sget_select_hyper_nblocks_c
              INTEGER(HID_T), INTENT(IN) :: space_id
              INTEGER(HSSIZE_T), INTENT(OUT) :: num_blocks 
              END FUNCTION h5sget_select_hyper_nblocks_c
            END INTERFACE

            hdferr =  h5sget_select_hyper_nblocks_c (space_id, num_blocks)
 
          END SUBROUTINE h5sget_select_hyper_nblocks_f

!----------------------------------------------------------------------
! Name:		h5sget_select_hyper_blocklist_f 
!
! Purpose: 	Gets the list of hyperslab blocks currently selected. 	
!
! Inputs:  
!		space_id	- dataspace identifier
!		startblock	- hyperslab block to start with
!		num_blocks	- number of blocks to get
! Outputs:  
!		buf		- buffer to hold block list
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------

          SUBROUTINE h5sget_select_hyper_blocklist_f(space_id, startblock, &
                                                    num_blocks, buf, hdferr) 

            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: space_id ! Dataspace identifier 
            INTEGER(HSIZE_T), DIMENSION(*), INTENT(IN) :: startblock 
                                             !Hyperslab block to start with. 
            INTEGER(HSIZE_T), INTENT(IN) :: num_blocks 
                                             !number of hyperslab blocks 
                                             !to get in the current dataspace 
                                             !selection 
            INTEGER(HSIZE_T), DIMENSION(*), INTENT(OUT) :: buf 
                                             !List of hyperslab blocks selected
            INTEGER, INTENT(OUT) :: hdferr   ! Error code


!            INTEGER, EXTERNAL :: h5sget_select_hyper_blocklist_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5sget_select_hyper_blocklist_c(space_id, startblock, &
                                                              num_blocks, buf )
              USE H5GLOBAL
            !MS$ATTRIBUTES C,reference,alias:'_H5SGET_SELECT_HYPER_BLOCKLIST_C'::h5sget_select_hyper_blocklist_c
              INTEGER(HID_T), INTENT(IN) :: space_id 
              INTEGER(HSIZE_T), DIMENSION(*), INTENT(IN) :: startblock 
              INTEGER(HSSIZE_T), INTENT(OUT) :: num_blocks 
              INTEGER(HSIZE_T), DIMENSION(*), INTENT(OUT) :: buf 
              END FUNCTION h5sget_select_hyper_blocklist_c
            END INTERFACE

 
            hdferr =  h5sget_select_hyper_blocklist_c(space_id, startblock, &
                                                       num_blocks, buf )
 
          END SUBROUTINE h5sget_select_hyper_blocklist_f

!----------------------------------------------------------------------
! Name:		h5sget_select_bounds_f 
!
! Purpose: 	Gets the bounding box containing the current selection. 	
!
! Inputs:  
!		space_id	- dataspace identifier
!		
! Outputs:  
!		start		- starting coordinates of bounding box
!		end		- ending coordinates of bounding box
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------

          SUBROUTINE  h5sget_select_bounds_f(space_id, start, end, hdferr)

            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: space_id ! Dataspace identifier 
            INTEGER(HSIZE_T), DIMENSION(*), INTENT(OUT) :: start
                                             !Starting coordinates of the bounding box. 
            INTEGER(HSIZE_T), DIMENSION(*), INTENT(OUT) :: end
                                             !Ending coordinates of the bounding box,
                                             !i.e., the coordinates of the diagonally 
                                             !opposite corner 
            INTEGER, INTENT(OUT) :: hdferr   ! Error code

!            INTEGER, EXTERNAL :: h5sget_select_bounds_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5sget_select_bounds_c(space_id, start, end)
              USE H5GLOBAL
!MS$ATTRIBUTES C,reference,alias:'_H5SGET_SELECT_BOUNDS_C'::h5sget_select_bounds_c
              INTEGER(HID_T), INTENT(IN) :: space_id
              INTEGER(HSIZE_T), DIMENSION(*), INTENT(OUT) :: start
              INTEGER(HSIZE_T), DIMENSION(*), INTENT(OUT) :: end
              END FUNCTION h5sget_select_bounds_c
            END INTERFACE

            hdferr =   h5sget_select_bounds_c(space_id, start, end)
 
          END SUBROUTINE h5sget_select_bounds_f

!----------------------------------------------------------------------
! Name:		h5sget_select_elem_npoints_f 
!
! Purpose: 	Gets the number of element points in the current selection	
!
! Inputs:  
!		space_id	- dataspace identifier
! Outputs:  
!		num_points	- number of element points in the current 
!				  dataspace selection
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------
          SUBROUTINE h5sget_select_elem_npoints_f(space_id, num_points, hdferr) 

            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: space_id ! Dataspace identifier 
            INTEGER(HSSIZE_T), INTENT(OUT) :: num_points 
                                             !number of element points 
                                             !in the current dataspace 
                                             !selection 
            INTEGER, INTENT(OUT) :: hdferr   ! Error code

!            INTEGER, EXTERNAL :: h5sget_select_elem_npoints_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5sget_select_elem_npoints_c (space_id, num_points)
              USE H5GLOBAL
!MS$ATTRIBUTES C,reference,alias:'_H5SGET_SELECT_ELEM_NPOINTS_C'::h5sget_select_elem_npoints_c
              INTEGER(HID_T), INTENT(IN) :: space_id
              INTEGER(HSSIZE_T), INTENT(OUT) :: num_points 
              END FUNCTION h5sget_select_elem_npoints_c
            END INTERFACE

            hdferr =  h5sget_select_elem_npoints_c (space_id, num_points)
 
          END SUBROUTINE h5sget_select_elem_npoints_f

!----------------------------------------------------------------------
! Name:		h5sget_select_elem_pointlist_f 
!
! Purpose:	Gets the list of element points currently selected.  	
!
! Inputs:  
!		space_id	- dataspace identifier
!		startpoint	- element point to start with 
!		num_points	- number of elemnt points to get
! Outputs:  
!		buf		- buffer with element points selected
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------

          SUBROUTINE h5sget_select_elem_pointlist_f(space_id, startpoint, &
                                                    num_points, buf, hdferr) 
            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: space_id ! Dataspace identifier 
            INTEGER(HSIZE_T),DIMENSION(*), INTENT(IN) :: startpoint 
                                             !Element point to start with. 
            INTEGER(HSIZE_T), INTENT(IN) :: num_points 
                                             !Number of element points to get 
            INTEGER(HSIZE_T), DIMENSION(*), INTENT(OUT) :: buf 
                                             !List of element points selected
            INTEGER, INTENT(OUT) :: hdferr   ! Error code

!            INTEGER, EXTERNAL :: h5sget_select_elem_pointlist_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5sget_select_elem_pointlist_c(space_id, startpoint, &
                                                              num_points, buf )
              USE H5GLOBAL
!MS$ATTRIBUTES C,reference,alias:'_H5SGET_SELECT_ELEM_POINTLIST_C'::h5sget_select_elem_pointlist_c
              INTEGER(HID_T), INTENT(IN) :: space_id
              INTEGER(HSIZE_T),DIMENSION(*), INTENT(IN) :: startpoint 
              INTEGER(HSIZE_T), INTENT(IN) :: num_points 
              INTEGER(HSIZE_T), DIMENSION(*), INTENT(OUT) :: buf 
              END FUNCTION h5sget_select_elem_pointlist_c
            END INTERFACE

            hdferr =  h5sget_select_elem_pointlist_c(space_id, startpoint, &
                                                       num_points, buf )
          END SUBROUTINE h5sget_select_elem_pointlist_f

!----------------------------------------------------------------------
! Name:		h5sselect_elements_f 
!
! Purpose:	Selects elements to be included in the selection for 
!		a dataspace 	
!
! Inputs:  
!		space_id	- dataspace identifier
!		operator	- flag, valid values are:
!				  H5S_SELECT_SET_F (0)
!				  H5S_SELECT_OR_F (1)
!		rank		- number of dataspace dimensions
!		num_elements	- number of elements to be selected
!		coord		- 2D (rank x num_elements) array with the 
!				  elements coordinates
! Outputs:  
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------
          SUBROUTINE h5sselect_elements_f(space_id, operator, rank, & 
                                          num_elements, coord, hdferr) 
            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: space_id ! Dataspace identifier 
            INTEGER, INTENT(IN) :: operator    ! Flag, valid values are:
                                               ! H5S_SELECT_SET_F (0)
                                               ! H5S_SELECT_OR_F (1)
            INTEGER, INTENT(IN) :: rank     ! Number of dataspace dimensions 
            INTEGER(SIZE_T), INTENT(IN) :: num_elements  ! Number of elements to be
                                                 ! selected
            INTEGER(HSSIZE_T), & 
            DIMENSION(rank,num_elements), INTENT(IN) :: coord 
                                          ! Array with the coordinates
                                          ! of the selected elements
                                          ! coord(rank, num_elements)
            INTEGER, INTENT(OUT) :: hdferr     ! Error code
            INTEGER(HSSIZE_T), ALLOCATABLE, DIMENSION(:,:) :: c_coord
            INTEGER :: error, i,j

!            INTEGER, EXTERNAL :: h5sselect_elements_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5sselect_elements_c(space_id, operator,&
                               num_elements,c_c_coord)
              USE H5GLOBAL
              !MS$ATTRIBUTES C,reference,alias:'_H5SSELECT_ELEMENTS_C'::h5sselect_elements_c
              INTEGER(HID_T), INTENT(IN) :: space_id
              INTEGER, INTENT(IN) :: operator
              INTEGER, INTENT(IN) :: num_elements
              INTEGER(HSSIZE_T),DIMENSION(*) :: c_c_coord
              END FUNCTION h5sselect_elements_c
            END INTERFACE

            allocate(c_coord(rank, num_elements), stat = error)
            if (error.NE. 0) then
                hdferr = -1
                return
            endif
            do i = 1, rank
               c_coord(i,:) = coord(rank-i+1, :) - 1
            enddo 
            hdferr = h5sselect_elements_c(space_id, operator, num_elements, &
                                          c_coord)
            deallocate(c_coord)
 
          END SUBROUTINE h5sselect_elements_f

!----------------------------------------------------------------------
! Name:		h5sselect_all_f 
!
! Purpose: 	Selects the entire dataspace. 	
!
! Inputs:  
!		space_id	- identifier for the dataspace in which
!				  selection being made
! Outputs:  
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------

          SUBROUTINE h5sselect_all_f(space_id, hdferr) 
            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: space_id  ! Dataspace identifier 
            INTEGER, INTENT(OUT) :: hdferr          ! Error code

!            INTEGER, EXTERNAL :: h5sselect_all_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5sselect_all_c(space_id)
              USE H5GLOBAL
              !MS$ATTRIBUTES C,reference,alias:'_H5SSELECT_ALL_C'::h5sselect_all_c
              INTEGER(HID_T), INTENT(IN) :: space_id
              END FUNCTION h5sselect_all_c
            END INTERFACE

            hdferr = h5sselect_all_c(space_id)

          END SUBROUTINE h5sselect_all_f

!----------------------------------------------------------------------
! Name:		h5sselect_none_f 
!
! Purpose: 	Resets the selection region to include no elements. 	
!
! Inputs:  
!		space_id	- the identifier for the dataspace in which 
!                                 the selection is being reset. 
! Outputs:  
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------

          SUBROUTINE h5sselect_none_f(space_id, hdferr) 

            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: space_id  ! Dataspace identifier 
            INTEGER, INTENT(OUT) :: hdferr          ! Error code

!            INTEGER, EXTERNAL :: h5sselect_none_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5sselect_none_c(space_id)
              USE H5GLOBAL
              !MS$ATTRIBUTES C,reference,alias:'_H5SSELECT_NONE_C'::h5sselect_none_c
              INTEGER(HID_T), INTENT(IN) :: space_id 
              END FUNCTION h5sselect_none_c
            END INTERFACE

            hdferr = h5sselect_none_c(space_id)

          END SUBROUTINE h5sselect_none_f

!----------------------------------------------------------------------
! Name:		h5sselect_valid_f 
!
! Purpose:	Verifies that the selection is within the extent of 
!		the dataspace.  	
!
! Inputs:  
!		space_id	- identifier for the dataspace for which 
!				  selection is verified
! Outputs:  
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------
          SUBROUTINE h5sselect_valid_f(space_id, status, hdferr) 

            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: space_id  ! Dataspace identifier 
            LOGICAL, INTENT(OUT) :: status          ! TRUE if the selection is
                                                    ! contained within the extent,
                                                    ! FALSE otherwise. 
            INTEGER, INTENT(OUT) :: hdferr          ! Error code
            INTEGER :: flag ! "TRUE/FALSE/ERROR" flag from C routine

!            INTEGER, EXTERNAL :: h5sselect_valid_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5sselect_valid_c(space_id, flag) 
              USE H5GLOBAL
              !MS$ATTRIBUTES C,reference,alias:'_H5SSELECT_VALID_C'::h5sselect_valid_c
              INTEGER(HID_T), INTENT(IN) :: space_id
              INTEGER :: flag
              END FUNCTION h5sselect_valid_c 
            END INTERFACE

            hdferr = h5sselect_valid_c(space_id, flag)
            status = .TRUE.
            if (flag .EQ. 0) status = .FALSE.

          END SUBROUTINE h5sselect_valid_f

!----------------------------------------------------------------------
! Name:		h5sget_simple_extent_npoints_f 
!
! Purpose: 	Determines the number of elements in a dataspace. 	
!
! Inputs:  
!		space_id	- dataspace identifier
! Outputs:  
!		npoints		- number of elements in the dataspace
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------

          SUBROUTINE h5sget_simple_extent_npoints_f(space_id, npoints, hdferr) 

            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: space_id     ! Dataspace identifier 
            INTEGER(HSIZE_T), INTENT(OUT) :: npoints  ! Number of elements in 
                                                       ! dataspace
            INTEGER, INTENT(OUT) :: hdferr             ! Error code

!            INTEGER, EXTERNAL :: h5sget_simple_extent_npoints_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5sget_simple_extent_npoints_c( space_id, npoints) 
              USE H5GLOBAL
              !MS$ATTRIBUTES C,reference,alias:'_H5SGET_SIMPLE_EXTENT_NPOINTS_C'::h5sget_simple_extent_npoints_c
              INTEGER(HID_T), INTENT(IN) :: space_id
              INTEGER(HSIZE_T), INTENT(OUT) :: npoints
              END FUNCTION h5sget_simple_extent_npoints_c
            END INTERFACE

            hdferr = h5sget_simple_extent_npoints_c( space_id, npoints)
 
          END SUBROUTINE h5sget_simple_extent_npoints_f

!----------------------------------------------------------------------
! Name:		h5sget_select_npoints_f 
!
! Purpose: 	Determines the number of elements in a dataspace selection. 	
!
! Inputs: 
!		space_id	- dataspace identifier 
! Outputs:  
!		npoints		- number of points in the dataspace selection
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------

          SUBROUTINE h5sget_select_npoints_f(space_id, npoints, hdferr) 

            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: space_id     ! Dataspace identifier 
            INTEGER(HSSIZE_T), INTENT(OUT) :: npoints  ! Number of elements in the
                                                       ! selection 
            INTEGER, INTENT(OUT) :: hdferr             ! Error code

!            INTEGER, EXTERNAL :: h5sget_select_npoints_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5sget_select_npoints_c(space_id, npoints) 
              USE H5GLOBAL
              !MS$ATTRIBUTES C,reference,alias:'_H5SGET_SELECT_NPOINTS_C'::h5sget_select_npoints_c
              INTEGER(HID_T), INTENT(IN) :: space_id
              INTEGER(HSSIZE_T), INTENT(OUT) :: npoints
              END FUNCTION h5sget_select_npoints_c
            END INTERFACE

            hdferr = h5sget_select_npoints_c(space_id, npoints)
 
          END SUBROUTINE h5sget_select_npoints_f

!----------------------------------------------------------------------
! Name:		h5sget_simple_extent_ndims_f 
!
! Purpose: 	Determines the dimensionality of a dataspace	
!
! Inputs:  
!		space_id	- dataspace identifier
! Outputs:  
!		rank		- number of dataspace dimensions
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------

          SUBROUTINE h5sget_simple_extent_ndims_f(space_id, rank, hdferr) 

            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: space_id     ! Dataspace identifier 
            INTEGER, INTENT(OUT) :: rank               ! Number of dimensions 
            INTEGER, INTENT(OUT) :: hdferr             ! Error code

!            INTEGER, EXTERNAL :: h5sget_simple_extent_ndims_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5sget_simple_extent_ndims_c(space_id, rank) 
              USE H5GLOBAL
              !MS$ATTRIBUTES C,reference,alias:'_H5SGET_SIMPLE_EXTENT_NDIMS_C'::h5sget_simple_extent_ndims_c
              INTEGER(HID_T), INTENT(IN) :: space_id
              INTEGER, INTENT(OUT) :: rank
              END FUNCTION h5sget_simple_extent_ndims_c
            END INTERFACE

            hdferr = h5sget_simple_extent_ndims_c(space_id, rank)
 
          END SUBROUTINE h5sget_simple_extent_ndims_f

!----------------------------------------------------------------------
! Name:		h5sget_simple_extent_dims_f 
!
! Purpose: 	Retrieves dataspace dimension size and maximum size. 	
!
! Inputs:  
!		space_id	- dataspace identifier
! Outputs:  
!		dims		- array to store size of each dimension
!		maxdims		- array to store maximum size of each 
!				  dimension
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------

          SUBROUTINE h5sget_simple_extent_dims_f(space_id, dims, maxdims, hdferr) 

            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: space_id ! Dataspace identifier 
            INTEGER(HSIZE_T), DIMENSION(*), INTENT(OUT) :: dims 
                                                   ! Array to store dimension sizes 
            INTEGER(HSIZE_T), DIMENSION(*), INTENT(OUT) :: maxdims 
                                                   ! Array to store max dimension 
                                                   ! sizes  
            INTEGER, INTENT(OUT) :: hdferr         ! Error code: -1 on failure,
                                                   ! number of dimensions on
                                                   ! on success

!            INTEGER, EXTERNAL :: h5sget_simple_extent_dims_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5sget_simple_extent_dims_c(space_id, dims, maxdims)
              USE H5GLOBAL
              !MS$ATTRIBUTES C,reference,alias:'_H5SGET_SIMPLE_EXTENT_DIMS_C'::h5sget_simple_extent_dims_c
              INTEGER(HID_T), INTENT(IN) :: space_id
              INTEGER(HSIZE_T), DIMENSION(*), INTENT(OUT) :: dims
              INTEGER(HSIZE_T), DIMENSION(*), INTENT(OUT) :: maxdims
              END FUNCTION h5sget_simple_extent_dims_c
            END INTERFACE

            hdferr = h5sget_simple_extent_dims_c(space_id, dims, maxdims)
 
          END SUBROUTINE h5sget_simple_extent_dims_f

!----------------------------------------------------------------------
! Name:		h5sget_simple_extent_type_f 
!
! Purpose: 	Determine the current class of a dataspace	
!
! Inputs:  
!		space_id	- dataspace identifier
! Outputs:  
!		classtype	- class type, possible values are:
!				  H5S_NO_CLASS_F (-1)
!				  H5S_SCALAR_F (0)
!				  H5S_SIMPLE_F (1)
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------

          SUBROUTINE h5sget_simple_extent_type_f(space_id, classtype, hdferr) 

            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: space_id ! Dataspace identifier 
            INTEGER, INTENT(OUT) :: classtype      ! Class type , possible values
                                                   ! are: 
                                                   !  H5S_NO_CLASS_F (-1)
                                                   !  H5S_SCALAR_F (0)
                                                   !  H5S_SIMPLE_F (1)
            INTEGER, INTENT(OUT) :: hdferr         ! Error code

!            INTEGER, EXTERNAL :: h5sget_simple_extent_type_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5sget_simple_extent_type_c(space_id, classtype)
              USE H5GLOBAL
              !MS$ATTRIBUTES C,reference,alias:'_H5SGET_SIMPLE_EXTENT_TYPE_C'::h5sget_simple_extent_type_c
              INTEGER(HID_T), INTENT(IN) :: space_id
              INTEGER, INTENT(OUT) :: classtype
              END FUNCTION h5sget_simple_extent_type_c
            END INTERFACE

            hdferr = h5sget_simple_extent_type_c(space_id, classtype)
 
          END SUBROUTINE h5sget_simple_extent_type_f

!----------------------------------------------------------------------
! Name:		h5sset_extent_simple_f 
!
! Purpose: 	Sets or resets the size of an existing dataspace. 	
!
! Inputs:  
!		space_id	- dataspace identifier
!		rank		- dataspace number of dimensions
!		current_size	- array with the new sizes of dimensions
!		maximum_size	- array with the new maximum sizes of 
!				  dimensions
! Outputs:  
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------

          SUBROUTINE h5sset_extent_simple_f(space_id, rank, current_size, &
                                            maximum_size, hdferr) 

            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: space_id ! Dataspace identifier 
            INTEGER, INTENT(IN) :: rank            ! Dataspace rank 
            INTEGER(HSIZE_T), DIMENSION(rank), INTENT(IN) :: current_size 
                                                   ! Array with the new sizes
                                                   ! of dimensions 
            INTEGER(HSIZE_T), DIMENSION(rank), INTENT(IN) :: maximum_size  
                                                   ! Array with the new maximum
                                                   ! sizes of dimensions 
                                                   ! sizes  
            INTEGER, INTENT(OUT) :: hdferr         ! Error code

!            INTEGER, EXTERNAL :: h5sset_extent_simple_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5sset_extent_simple_c(space_id, rank, &
                               current_size,  maximum_size) 
              USE H5GLOBAL
              !MS$ATTRIBUTES C,reference,alias:'_H5SSET_EXTENT_SIMPLE_C'::h5sset_extent_simple_c
              INTEGER(HID_T), INTENT(IN) :: space_id
              INTEGER, INTENT(IN) :: rank
              INTEGER(HSIZE_T), DIMENSION(rank), INTENT(IN) :: current_size
              INTEGER(HSIZE_T), DIMENSION(rank), INTENT(IN) :: maximum_size
              END FUNCTION h5sset_extent_simple_c
            END INTERFACE

            hdferr = h5sset_extent_simple_c(space_id, rank, current_size, &
                                            maximum_size)
 
          END SUBROUTINE h5sset_extent_simple_f

!----------------------------------------------------------------------
! Name:		h5sis_simple_f 
!
! Purpose: 	Determines whether a dataspace is a simple dataspace. 	
!
! Inputs:  
!		space_id	- dataspace identifier
! Outputs:  
!		status		- flag to indicate if dataspace
!				  is simple or not 
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------

          SUBROUTINE h5sis_simple_f(space_id, status, hdferr) 

            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: space_id  ! Dataspace identifier 
            LOGICAL, INTENT(OUT) :: status      ! Flag, idicates if dataspace
                                                ! is simple or not ( TRUE or
                                                ! FALSE)  
            INTEGER, INTENT(OUT) :: hdferr      ! Error code
            INTEGER :: flag                     ! "TRUE/FALSE/ERROR from C" 

!            INTEGER, EXTERNAL :: h5sis_simple_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5sis_simple_c(space_id, flag) 
              USE H5GLOBAL
              !MS$ATTRIBUTES C,reference,alias:'_H5SIS_SIMPLE_C'::h5sis_simple_c
              INTEGER(HID_T), INTENT(IN) :: space_id
              INTEGER :: flag
              END FUNCTION h5sis_simple_c
            END INTERFACE

            hdferr = h5sis_simple_c(space_id, flag)
            status = .TRUE.
            if (flag .EQ. 0) status = .FALSE.
 
          END SUBROUTINE h5sis_simple_f

!----------------------------------------------------------------------
! Name:		h5soffset_simple_f 
!
! Purpose:	Sets the offset of a simple dataspace.  	
!
! Inputs:  
!		space_id	- dataspace identifier
!		offset		- the offset at which to position the 
!				  selection 
! Outputs:  
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------
          SUBROUTINE h5soffset_simple_f(space_id, offset, hdferr) 

            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: space_id ! Dataspace identifier 
            INTEGER(HSSIZE_T), DIMENSION(*), INTENT(IN) ::  offset
                                                   ! The offset at which to position
                                                   ! the selection  
            INTEGER, INTENT(OUT) :: hdferr         ! Error code

!            INTEGER, EXTERNAL :: h5soffset_simple_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5soffset_simple_c(space_id, offset) 
              USE H5GLOBAL
              !MS$ATTRIBUTES C,reference,alias:'_H5SOFFSET_SIMPLE_C'::h5soffset_simple_c
              INTEGER(HID_T), INTENT(IN) :: space_id
              INTEGER(HSSIZE_T), DIMENSION(*), INTENT(IN) ::  offset
              END FUNCTION h5soffset_simple_c
            END INTERFACE

            hdferr = h5soffset_simple_c(space_id, offset)
 
          END SUBROUTINE h5soffset_simple_f

!----------------------------------------------------------------------
! Name:		h5sextent_copy_f 
!
! Purpose: 	Copies the extent of a dataspace. 	
!
! Inputs:  
!		dest_space_id	- the identifier for the dataspace to which 
!				  the extent is copied 
!		source_space_id	- the identifier for the dataspace from 
!				  which the extent is copied
! Outputs:  
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------

          SUBROUTINE h5sextent_copy_f(dest_space_id, source_space_id, hdferr) 

            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: dest_space_id  ! Identifier of destination
                                                         ! dataspace
            INTEGER(HID_T), INTENT(IN) :: source_space_id ! Identifier of source 
                                                          ! dataspace
            INTEGER, INTENT(OUT) :: hdferr                ! Error code

!            INTEGER, EXTERNAL :: h5sextent_copy_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5sextent_copy_c(dest_space_id, source_space_id)
              USE H5GLOBAL
              !MS$ATTRIBUTES C,reference,alias:'_H5SEXTENT_COPY_C'::h5sextent_copy_c
              INTEGER(HID_T), INTENT(IN) :: dest_space_id
              INTEGER(HID_T), INTENT(IN) :: source_space_id
              END FUNCTION h5sextent_copy_c
            END INTERFACE

            hdferr = h5sextent_copy_c(dest_space_id, source_space_id)
 
          END SUBROUTINE h5sextent_copy_f

!----------------------------------------------------------------------
! Name:		h5sset_extent_none_f 
!
! Purpose:	Removes the extent from a dataspace.  	
!
! Inputs:  
!		space_id	- dataspace identifier
! Outputs:  
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!				NONE
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------
          SUBROUTINE h5sset_extent_none_f(space_id, hdferr) 

            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: space_id  ! Dataspace identifier 
            INTEGER, INTENT(OUT) :: hdferr          ! Error code

!            INTEGER, EXTERNAL :: h5sset_extent_none_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5sset_extent_none_c(space_id) 
              USE H5GLOBAL
              !MS$ATTRIBUTES C,reference,alias:'_H5SSET_EXTENT_NONE_C'::h5sset_extent_none_c
              INTEGER(HID_T), INTENT(IN) :: space_id
              END FUNCTION h5sset_extent_none_c
            END INTERFACE

            hdferr = h5sset_extent_none_c(space_id)
 
          END SUBROUTINE h5sset_extent_none_f

!----------------------------------------------------------------------
! Name:		h5sselect_hyperslab_f 
!
! Purpose:	Selects a hyperslab region to add to the current selected 
!		region 	
!
! Inputs:  
!		space_id	- dataspace identifier
!		operator	- flag, valid values are:
!				  H5S_SELECT_SET_F (0)
!				  H5S_SELECT_OR_F (1)
!		start		- array with hyperslab offsets
!		count		- number of blocks included in the 
!				  hyperslab
! Outputs:  
!		hdferr:		- error code		
!				 	Success:  0
!				 	Failure: -1   
! Optional parameters:
!		stride		- array with hyperslab strides
!		block		- array with hyperslab block sizes 
!
! Programmer:	Elena Pourmal
!		August 12, 1999	
!
! Modifications: 	Explicit Fortran interfaces were added for 
!			called C functions (it is needed for Windows
!			port).  March 6, 2001 
!
! Comment:		
!----------------------------------------------------------------------

          SUBROUTINE h5sselect_hyperslab_f(space_id, operator, start, count, &
                                           hdferr, stride, block) 
            IMPLICIT NONE
            INTEGER(HID_T), INTENT(IN) :: space_id ! Dataspace identifier 
            INTEGER, INTENT(IN) :: operator     ! Flag, valid values are:
                                                ! H5S_SELECT_SET_F (0)
                                                ! H5S_SELECT_OR_F (1)
                                                !  
            INTEGER(HSSIZE_T), DIMENSION(*), INTENT(IN) :: start
                                          ! Starting coordinates of the hyperslab 
            INTEGER(HSIZE_T), DIMENSION(*), INTENT(IN) :: count 
                                          ! Number of blocks to select 
                                          ! from dataspace 
            INTEGER, INTENT(OUT) :: hdferr     ! Error code
            INTEGER(HSIZE_T), DIMENSION(:), OPTIONAL, INTENT(IN) :: stride
                                          ! Array of how many elements to move
                                          ! in each direction
            INTEGER(HSIZE_T), DIMENSION(:), OPTIONAL, INTENT(IN) :: block 
                                          ! Sizes of element block
            INTEGER(HSIZE_T), DIMENSION(:), ALLOCATABLE :: def_block 
            INTEGER(HSIZE_T), DIMENSION(:), ALLOCATABLE :: def_stride
            INTEGER :: rank
            INTEGER :: error1, error2 

!            INTEGER, EXTERNAL :: h5sselect_hyperslab_c
!  MS FORTRAN needs explicit interface for C functions called here.
!
            INTERFACE
              INTEGER FUNCTION h5sselect_hyperslab_c(space_id, operator, &
                               start, count, stride, block)
              USE H5GLOBAL
              !MS$ATTRIBUTES C,reference,alias:'_H5SSELECT_HYPERSLAB_C'::h5sselect_hyperslab_c
              INTEGER(HID_T), INTENT(IN) :: space_id
              INTEGER, INTENT(IN) :: operator
              INTEGER(HSSIZE_T), DIMENSION(*), INTENT(IN) :: start
              INTEGER(HSIZE_T), DIMENSION(*), INTENT(IN) :: count
              INTEGER(HSIZE_T), DIMENSION(*), OPTIONAL, INTENT(IN) :: stride
              INTEGER(HSIZE_T), DIMENSION(*), OPTIONAL, INTENT(IN) :: block 
              END FUNCTION h5sselect_hyperslab_c
            END INTERFACE

            if (present(stride).and. present(block)) then
            hdferr = h5sselect_hyperslab_c(space_id, operator, start, count, &
                                           stride, block)
            return
            endif
            ! Case of optional parameters.
            !
            ! Find the rank of the dataspace to allocate memery for
            ! default stride and block arrays.
            !
            CALL h5sget_simple_extent_ndims_f(space_id, rank, hdferr)
            if( hdferr .EQ. -1) return
            !
            if (present(stride).and. .not.present(block)) then
            allocate(def_block(rank), stat=error1)
                if (error1.NE.0) then
                    hdferr = -1
                    return
                endif
            def_block = 1
            hdferr = h5sselect_hyperslab_c(space_id, operator, start, count, &
                                           stride, def_block)
            deallocate(def_block)
            return
            endif

            if (.not.present(stride).and. present(block)) then
            allocate(def_stride(rank), stat=error2)
                if (error2.NE.0) then
                    hdferr = -1
                    return
                endif
            def_stride = 1
            hdferr = h5sselect_hyperslab_c(space_id, operator, start, count, &
                                           def_stride, block)
            deallocate(def_stride)
            return
            endif
            allocate(def_block(rank), stat=error1)
            allocate(def_stride(rank), stat=error2)
                if ((error1.NE.0) .OR. (error2.NE.0)) then
                    hdferr = -1
                    return
                endif
            def_block = 1
            def_stride = 1
            hdferr = h5sselect_hyperslab_c(space_id, operator, start, count, &
                                           def_stride, def_block)
            deallocate(def_block)
            deallocate(def_stride)
 
          END SUBROUTINE h5sselect_hyperslab_f

      END MODULE H5S