! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
!   Copyright by The HDF Group.                                               *
!   Copyright by the Board of Trustees of the University of Illinois.         *
!   All rights reserved.                                                      *
!                                                                             *
!   This file is part of HDF5.  The full HDF5 copyright notice, including     *
!   terms governing use, modification, and redistribution, is contained in    *
!   the files COPYING and Copyright.html.  COPYING can be found at the root   *
!   of the source code distribution tree; Copyright.html can be found at the  *
!   root level of an installed copy of the electronic HDF5 document set and   *
!   is linked from the top-level documents page.  It can also be found at     *
!   http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
!   access to either file, you may request a copy from help@hdfgroup.org.     *
! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
!
!
! This file contains the FORTRAN90 tests for H5LT
!
#include <H5config_f.inc>

PROGRAM lite_test
  
  CALL test_dataset1D()
  CALL test_dataset2D()
  CALL test_dataset3D()
  CALL test_datasetND(4)
  CALL test_datasetND(5)
  CALL test_datasetND(6)
  CALL test_datasetND(7)
  CALL test_datasets()
  CALL test_attributes()

END PROGRAM lite_test


!-------------------------------------------------------------------------
! test_dataset1D
!-------------------------------------------------------------------------

SUBROUTINE test_dataset1D()
  
  USE, INTRINSIC :: ISO_C_BINDING
  USE H5LT ! module of H5LT
  USE HDF5 ! module of HDF5 library
  
  IMPLICIT NONE
  
  INTEGER, PARAMETER :: DIM1 = 4                       ! Dimension of array
  CHARACTER(len=9), PARAMETER :: filename = "dsetf1.h5"! File name
  CHARACTER(LEN=5), PARAMETER :: dsetname1 = "dset1"   ! Dataset name
  CHARACTER(LEN=5), PARAMETER :: dsetname2 = "dset2"   ! Dataset name
  CHARACTER(LEN=5), PARAMETER :: dsetname3 = "dset3"   ! Dataset name
  INTEGER(HID_T) :: file_id                            ! File identifier
  INTEGER(HSIZE_T), DIMENSION(1) :: dims = (/DIM1/)    ! Dataset dimensions
  INTEGER        :: rank = 1                           ! Dataset rank
  INTEGER, DIMENSION(DIM1) :: buf1                     ! Data buffer
  INTEGER, DIMENSION(DIM1) :: bufr1                    ! Data buffer
  REAL, DIMENSION(DIM1)    :: buf2                     ! Data buffer
  REAL, DIMENSION(DIM1)    :: bufr2                    ! Data buffer
  DOUBLE PRECISION, DIMENSION(DIM1), TARGET :: buf3    ! Data buffer
  DOUBLE PRECISION, DIMENSION(DIM1), TARGET :: bufr3   ! Data buffer
  INTEGER        :: errcode                            ! Error flag
  INTEGER        :: i                                  ! general purpose integer
  TYPE(C_PTR) :: f_ptr
  integer(HID_T) :: mytype

  CALL test_begin(' Make/Read datasets (1D)        ')

  !
  ! Initialize the data array.
  !
  DO i = 1, DIM1
     buf1(i) = i
     buf2(i) = i
     buf3(i) = i
  END DO

  !
  ! Initialize FORTRAN predefined datatypes.
  !
  CALL h5open_f(errcode)

  !
  ! Create a new file using default properties.
  !
  CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file_id, errcode)

  !-------------------------------------------------------------------------
  ! H5T_NATIVE_INTEGER
  !-------------------------------------------------------------------------

  !
  ! write dataset.
  !
  CALL h5ltmake_dataset_f(file_id, dsetname1, rank, dims, H5T_NATIVE_INTEGER, buf1, errcode)
  !
  ! read dataset.
  !
  CALL h5ltread_dataset_f(file_id, dsetname1, H5T_NATIVE_INTEGER, bufr1, dims, errcode)

  !
  ! compare read and write buffers.
  !
  DO i = 1, DIM1
     IF ( buf1(i) .NE. bufr1(i) ) THEN
        PRINT *, 'read buffer differs from write buffer (I)'
        PRINT *,  bufr1(i), ' and ',   buf1(i)
        STOP
     ENDIF
  END DO

  !-------------------------------------------------------------------------
  ! H5T_NATIVE_REAL
  !-------------------------------------------------------------------------

  !
  ! write dataset.
  !
  CALL h5ltmake_dataset_f(file_id, dsetname2, rank, dims, H5T_NATIVE_REAL, buf2, errcode)

  !
  ! read dataset.
  !
  CALL h5ltread_dataset_f(file_id, dsetname2, H5T_NATIVE_REAL, bufr2, dims, errcode)

  !
  ! compare read and write buffers.
  !
  DO i = 1, DIM1
     IF ( buf2(i) .NE. bufr2(i) ) THEN
        PRINT *, 'read buffer differs from write buffer (R)'
        PRINT *,  bufr2(i), ' and ',   buf2(i)
        STOP
     ENDIF
  END DO

  !-------------------------------------------------------------------------
  ! H5T_NATIVE_DOUBLE
  !-------------------------------------------------------------------------

  !
  ! write dataset.
  !
  f_ptr = C_LOC(buf3(1))
  mytype = h5kind_to_type(KIND(buf3(1)), H5_REAL_KIND)
  CALL h5ltmake_dataset_f(file_id, dsetname3, rank, dims, &
       mytype, f_ptr, errcode)
  !CALL h5ltmake_dataset_f(file_id, dsetname3, rank, dims, H5T_NATIVE_DOUBLE, buf3, errcode)
  ! h5kind_to_type(KIND(buf3(1)), H5_REAL_KIND)
  !
  ! read dataset.
  !
  f_ptr = C_LOC(bufr3(1))
  CALL h5ltread_dataset_f(file_id, dsetname3, &
       h5kind_to_type(KIND(bufr3(1)), H5_REAL_KIND), f_ptr, errcode)
  !CALL h5ltread_dataset_f(file_id, dsetname3, H5T_NATIVE_DOUBLE, bufr3, dims, errcode)

  !
  ! compare read and write buffers.
  !
  DO i = 1, DIM1
     IF ( buf3(i) .NE. bufr3(i) ) THEN
        PRINT *, 'read buffer differs from write buffer (D)'
        PRINT *,  bufr3(i), ' and ',   buf3(i)
        STOP
     ENDIF
  END DO

  !
  ! Close the file.
  !
  CALL h5fclose_f(file_id, errcode)

  !
  ! Close FORTRAN predefined datatypes.
  !
  CALL h5close_f(errcode)

  CALL passed()
  !
  ! end function.
  !
END SUBROUTINE test_dataset1D

!-------------------------------------------------------------------------
! test_dataset2D
!-------------------------------------------------------------------------

SUBROUTINE test_dataset2D()

  USE, INTRINSIC :: ISO_C_BINDING
  USE H5LT ! module of H5LT
  USE HDF5 ! module of HDF5 library

  IMPLICIT NONE


  INTEGER(HSIZE_T), PARAMETER :: DIM1 = 4              ! columns
  INTEGER(HSIZE_T), PARAMETER :: DIM2 = 6              ! rows
  CHARACTER(len=9), PARAMETER :: filename = "dsetf2.h5"! File name
  CHARACTER(LEN=5), PARAMETER :: dsetname1 = "dset1"   ! Dataset name
  CHARACTER(LEN=5), PARAMETER :: dsetname2 = "dset2"   ! Dataset name
  CHARACTER(LEN=5), PARAMETER :: dsetname3 = "dset3"   ! Dataset name
  CHARACTER(LEN=5), PARAMETER :: dsetname4 = "dset4"   ! Dataset name
  INTEGER(HID_T) :: file_id                            ! File identifier
  INTEGER(HSIZE_T), DIMENSION(2) :: dims = (/4,6/)     ! Dataset dimensions
  INTEGER        :: rank = 2                           ! Dataset rank
  INTEGER, DIMENSION(DIM1*DIM2) :: buf                 ! Data buffer
  INTEGER, DIMENSION(DIM1*DIM2) :: bufr                ! Data buffer
  INTEGER, DIMENSION(DIM1,DIM2) :: buf2                ! Data buffer
  INTEGER, DIMENSION(DIM1,DIM2) :: buf2r               ! Data buffer
  REAL, DIMENSION(DIM1,DIM2), TARGET    :: buf3                ! Data buffer
  REAL, DIMENSION(DIM1,DIM2), TARGET    :: buf3r               ! Data buffer
  DOUBLE PRECISION, DIMENSION(DIM1,DIM2), TARGET :: buf4       ! Data buffer
  DOUBLE PRECISION, DIMENSION(DIM1,DIM2), TARGET :: buf4r      ! Data buffer
  INTEGER        :: errcode                            ! Error flag
  INTEGER(HSIZE_T) :: i, j, n                            ! general purpose integers
  TYPE(C_PTR) :: f_ptr

  CALL test_begin(' Make/Read datasets (2D)        ')


  !
  ! Initialize the data arrays.
  !
  n=1
  DO i = 1, DIM1*DIM2
     buf(i) = INT(n)
     n = n + 1
  END DO

  DO i = 1, dims(1)
     DO j = 1, dims(2)
        buf2(i,j) = INT((i-1)*dims(2) + j)
        buf3(i,j) = INT((i-1)*dims(2) + j)
        buf4(i,j) = INT((i-1)*dims(2) + j)
     END DO
  END DO

  !
  ! Initialize FORTRAN predefined datatypes.
  !
  CALL h5open_f(errcode)

  !
  ! Create a new file using default properties.
  !
  CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file_id, errcode)

  !-------------------------------------------------------------------------
  ! H5T_NATIVE_INT 1D buffer
  !-------------------------------------------------------------------------

  !
  ! write dataset.
  !
  CALL h5ltmake_dataset_f(file_id, dsetname1, rank, dims, H5T_NATIVE_INTEGER, buf, errcode)

  !
  ! read dataset.
  !
  CALL h5ltread_dataset_f(file_id, dsetname1, H5T_NATIVE_INTEGER, bufr, dims, errcode)

  !
  ! compare read and write buffers.
  !
  DO i = 1, DIM1*DIM2
     IF ( buf(i) .NE. bufr(i) ) THEN
        PRINT *, 'read buffer differs from write buffer'
        PRINT *,  bufr(i), ' and ',   buf(i)
        STOP
     ENDIF
  END DO

  !-------------------------------------------------------------------------
  ! H5T_NATIVE_INT 2D buffer
  !-------------------------------------------------------------------------

  !
  ! write dataset.
  !
  CALL h5ltmake_dataset_f(file_id, dsetname2, rank, dims, H5T_NATIVE_INTEGER, buf2, errcode)

  !
  ! read dataset.
  !
  CALL h5ltread_dataset_f(file_id, dsetname2, H5T_NATIVE_INTEGER, buf2r, dims, errcode)

  !
  ! compare read and write buffers.
  !
  DO i = 1, dims(1)
     DO j = 1, dims(2)
        IF ( buf2(i,j) .NE. buf2r(i,j) ) THEN
           PRINT *, 'read buffer differs from write buffer'
           PRINT *,  buf2r(i,j), ' and ',   buf2(i,j)
           STOP
        ENDIF
     END DO
  END DO

  !-------------------------------------------------------------------------
  ! H5T_NATIVE_REAL
  !-------------------------------------------------------------------------

  !
  ! write dataset.
  !
  f_ptr = C_LOC(buf3(1,1))
  CALL h5ltmake_dataset_f(file_id, dsetname3, rank, dims, H5T_NATIVE_REAL, f_ptr, errcode)
  !CALL h5ltmake_dataset_f(file_id, dsetname3, rank, dims, H5T_NATIVE_REAL, buf3, errcode)

  !
  ! read dataset.
  !
  f_ptr = C_LOC(buf3r(1,1))
  CALL h5ltread_dataset_f(file_id, dsetname3, H5T_NATIVE_REAL, f_ptr, errcode)
  !CALL h5ltread_dataset_f(file_id, dsetname3, H5T_NATIVE_REAL, buf3r, dims, errcode)

  !
  ! compare read and write buffers.
  !
  DO i = 1, dims(1)
     DO j = 1, dims(2)
        IF ( buf3(i,j) .NE. buf3r(i,j) ) THEN
           PRINT *, 'read buffer differs from write buffer'
           PRINT *,  buf3r(i,j), ' and ',   buf3(i,j)
           STOP
        ENDIF
     END DO
  END DO

  !-------------------------------------------------------------------------
  ! H5T_NATIVE_DOUBLE
  !-------------------------------------------------------------------------

  !
  ! write dataset.
  !
  f_ptr = C_LOC(buf4(1,1))
  CALL h5ltmake_dataset_f(file_id, dsetname4, rank, dims, H5T_NATIVE_DOUBLE, f_ptr, errcode)
  !CALL h5ltmake_dataset_f(file_id, dsetname4, rank, dims, H5T_NATIVE_DOUBLE, buf4, errcode)

  !
  ! read dataset.
  f_ptr = C_LOC(buf4r(1,1))
  CALL h5ltread_dataset_f(file_id, dsetname4, H5T_NATIVE_DOUBLE, f_ptr, errcode)

  !CALL h5ltread_dataset_f(file_id, dsetname4, H5T_NATIVE_DOUBLE, buf4r, dims, errcode)

  !
  ! compare read and write buffers.
  !
  DO i = 1, dims(1)
     DO j = 1, dims(2)
        IF ( buf4(i,j) .NE. buf4r(i,j) ) THEN
           PRINT *, 'read buffer differs from write buffer'
           PRINT *,  buf4r(i,j), ' and ',   buf4(i,j)
           STOP
        ENDIF
     END DO
  END DO

  !
  ! Close the file.
  !
  CALL h5fclose_f(file_id, errcode)

  !
  ! Close FORTRAN predefined datatypes.
  !
  CALL h5close_f(errcode)

  CALL passed()
  !
  ! end function.
  !
END SUBROUTINE test_dataset2D


!-------------------------------------------------------------------------
! test_dataset3D
!-------------------------------------------------------------------------


SUBROUTINE test_dataset3D()
  USE, INTRINSIC :: ISO_C_BINDING
  USE H5LT ! module of H5LT
  USE HDF5 ! module of HDF5 library

  IMPLICIT NONE

  INTEGER, PARAMETER :: DIM1 = 6                             ! columns
  INTEGER, PARAMETER :: DIM2 = 4                             ! rows
  INTEGER, PARAMETER :: DIM3 = 2                             ! layers
  CHARACTER(len=9), PARAMETER :: filename = "dsetf3.h5"       ! File name
  CHARACTER(LEN=5), PARAMETER :: dsetname1 = "dset1"          ! Dataset name
  CHARACTER(LEN=5), PARAMETER :: dsetname2 = "dset2"          ! Dataset name
  CHARACTER(LEN=5), PARAMETER :: dsetname3 = "dset3"          ! Dataset name
  CHARACTER(LEN=5), PARAMETER :: dsetname4 = "dset4"          ! Dataset name
  INTEGER(HID_T) :: file_id                                   ! File identifier
  INTEGER(HSIZE_T), DIMENSION(3) :: dims = (/DIM1,DIM2,DIM3/) ! Dataset dimensions
  INTEGER(HSIZE_T), DIMENSION(3) :: dimsr                     ! Dataset dimensions
  INTEGER, DIMENSION(DIM1*DIM2*DIM3) :: buf                   ! Data buffer
  INTEGER, DIMENSION(DIM1*DIM2*DIM3) :: bufr                  ! Data buffer
  INTEGER, DIMENSION(DIM1,DIM2,DIM3) :: buf2                  ! Data buffer
  INTEGER, DIMENSION(DIM1,DIM2,DIM3) :: buf2r                 ! Data buffer
  REAL, DIMENSION(DIM1,DIM2,DIM3), TARGET    :: buf3                  ! Data buffer
  REAL, DIMENSION(DIM1,DIM2,DIM3), TARGET    :: buf3r                 ! Data buffer
  DOUBLE PRECISION, DIMENSION(DIM1,DIM2,DIM3), TARGET :: buf4         ! Data buffer
  DOUBLE PRECISION, DIMENSION(DIM1,DIM2,DIM3), TARGET :: buf4r        ! Data buffer
  INTEGER        :: rank = 3                                  ! Dataset rank
  INTEGER        :: errcode                                   ! Error flag
  INTEGER(HSIZE_T) :: i, j, k, n                                ! general purpose integers
  INTEGER          :: type_class
  INTEGER(SIZE_T)  :: type_size
  TYPE(C_PTR) :: f_ptr
#if H5_HAVE_Fortran_INTEGER_SIZEOF_16!=0
  INTEGER, PARAMETER :: int_kind_32 = SELECTED_INT_KIND(36) !should map to INTEGER*16 on most modern processors
  INTEGER(int_kind_32), DIMENSION(DIM1,DIM2,DIM3), TARGET :: dset_data_i32, data_out_i32
  CHARACTER(LEN=7), PARAMETER :: dsetname16a = "dset16a"     ! Dataset name
  CHARACTER(LEN=7), PARAMETER :: dsetname16b = "dset16b"     ! Dataset name
  CHARACTER(LEN=7), PARAMETER :: dsetname16c = "dset16c"     ! Dataset name
  INTEGER(HID_T) :: type_id
#endif

  CALL test_begin(' Make/Read datasets (3D)        ')


  !
  ! Initialize the data array.
  !
  n=1
  DO i = 1, DIM1*DIM2*DIM3
     buf(i) = INT(n)
     n = n + 1
  END DO

  n = 1
  DO i = 1, dims(1)
     DO j = 1, dims(2)
        DO k = 1, dims(3)
           buf2(i,j,k) = INT(n)
           buf3(i,j,k) = INT(n)
           buf4(i,j,k) = INT(n)
#if H5_HAVE_Fortran_INTEGER_SIZEOF_16!=0
           dset_data_i32(i,j,k) = HUGE(1_int_kind_32)-INT(n,int_kind_32)
#endif
           n = n + 1
        END DO
     END DO
  END DO

  !
  ! Initialize FORTRAN predefined datatypes.
  !
  CALL h5open_f(errcode)

  !
  ! Create a new file using default properties.
  !
  CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file_id, errcode)

  !-------------------------------------------------------------------------
  ! H5T_NATIVE_INT 1D buffer
  !-------------------------------------------------------------------------

  !
  ! write dataset.
  !
  CALL h5ltmake_dataset_f(file_id, dsetname1, rank, dims, H5T_NATIVE_INTEGER, buf, errcode)

  !
  ! read dataset.
  !
  CALL h5ltread_dataset_f(file_id, dsetname1, H5T_NATIVE_INTEGER, bufr, dims, errcode)

  !
  ! compare read and write buffers.
  !
  DO i = 1, DIM1*DIM2*DIM3
     IF ( buf(i) .NE. bufr(i) ) THEN
        PRINT *, 'read buffer differs from write buffer'
        PRINT *,  bufr(i), ' and ',   buf(i)
        STOP
     ENDIF
  END DO

  !-------------------------------------------------------------------------
  ! H5T_NATIVE_INT 3D buffer
  !-------------------------------------------------------------------------

  !
  ! write dataset.
  !
  CALL h5ltmake_dataset_f(file_id, dsetname2, rank, dims, H5T_NATIVE_INTEGER, buf2, errcode)

  !
  ! read dataset.
  !
  CALL h5ltread_dataset_f(file_id, dsetname2, H5T_NATIVE_INTEGER, buf2r, dims, errcode)

  !
  ! compare read and write buffers.
  !
  DO i = 1, dims(1)
     DO j = 1, dims(2)
        DO k = 1, dims(3)
           IF ( buf2(i,j,k) .NE. buf2r(i,j,k) ) THEN
              PRINT *, 'read buffer differs from write buffer'
              PRINT *,  buf2r(i,j,k), ' and ',   buf2(i,j,k)
              STOP
           ENDIF
        END DO
     END DO
  END DO

  !-------------------------------------------------------------------------
  ! H5T_NATIVE_REAL
  !-------------------------------------------------------------------------

  !
  ! write dataset.
  !
  f_ptr = C_LOC(buf3(1,1,1))
  CALL h5ltmake_dataset_f(file_id, dsetname3, rank, dims, H5T_NATIVE_REAL, f_ptr, errcode)
  !CALL h5ltmake_dataset_f(file_id, dsetname3, rank, dims, H5T_NATIVE_REAL, buf3, errcode)

  !
  ! read dataset.
  !
  f_ptr = C_LOC(buf3r(1,1,1))
  CALL h5ltread_dataset_f(file_id, dsetname3, H5T_NATIVE_REAL, f_ptr, errcode)
  !CALL h5ltread_dataset_f(file_id, dsetname3, H5T_NATIVE_REAL, buf3r, dims, errcode)

  !
  ! compare read and write buffers.
  !
  DO i = 1, dims(1)
     DO j = 1, dims(2)
        DO k = 1, dims(3)
           IF ( buf3(i,j,k) .NE. buf3r(i,j,k) ) THEN
              PRINT *, 'read buffer differs from write buffer'
              PRINT *,  buf3r(i,j,k), ' and ',   buf3(i,j,k)
              STOP
           ENDIF
        END DO
     END DO
  END DO

  !-------------------------------------------------------------------------
  ! H5T_NATIVE_DOUBLE
  !-------------------------------------------------------------------------

  !
  ! write dataset.
  !
  f_ptr = C_LOC(buf4(1,1,1))
  CALL h5ltmake_dataset_f(file_id, dsetname4, rank, dims, H5T_NATIVE_DOUBLE, f_ptr, errcode)

  !
  ! read dataset.
  !
  f_ptr = C_LOC(buf4r(1,1,1))
  CALL h5ltread_dataset_f(file_id, dsetname4, H5T_NATIVE_DOUBLE, f_ptr, errcode)

  !
  ! compare read and write buffers.
  !
  DO i = 1, dims(1)
     DO j = 1, dims(2)
        DO k = 1, dims(3)
           IF ( buf4(i,j,k) .NE. buf4r(i,j,k) ) THEN
              PRINT *, 'read buffer differs from write buffer'
              PRINT *,  buf4r(i,j,k), ' and ',   buf4(i,j,k)
              STOP
           ENDIF
        END DO
     END DO
  END DO

  CALL h5ltget_dataset_info_f(file_id,dsetname4,dimsr,type_class,type_size,errcode )

  !
  ! compare dimensions
  !
  DO i = 1, rank
     IF ( dimsr(i) .NE. dims(i) ) THEN
        PRINT *, 'dimensions differ '
        STOP
     ENDIF
  END DO

  !-------------------------------------------------------------------------
  ! CHECKING NON-NATIVE INTEGER TYPES
  !-------------------------------------------------------------------------

#if H5_HAVE_Fortran_INTEGER_SIZEOF_16!=0
  ! (A) CHECKING INTEGER*16
  !
  !    (i.a) write dataset using F2003 interface
  !
  type_id = H5kind_to_type(KIND(dset_data_i32(1,1,1)), H5_INTEGER_KIND)
  f_ptr = C_LOC(dset_data_i32(1,1,1))
  CALL h5ltmake_dataset_f(file_id, dsetname16a, rank, dims, type_id, f_ptr, errcode)
  !
  !    (i.b) read dataset using F2003 interface
  !
  f_ptr = C_LOC(data_out_i32(1,1,1))
  CALL h5ltread_dataset_f(file_id, dsetname16a, type_id, f_ptr, errcode)

  !
  !        compare read and write buffers.
  !
  DO i = 1, dims(1)
     DO j = 1, dims(2)
        DO k = 1, dims(3)
           IF ( dset_data_i32(i,j,k) .NE. data_out_i32(i,j,k) ) THEN
              PRINT *, 'read buffer differs from write buffer'
              PRINT *,  dset_data_i32(i,j,k), ' and ', data_out_i32(i,j,k) 
              STOP
           ENDIF
        END DO
     END DO
  ENDDO

  !
  !    (ii.a) write dataset using F90 interface
  !
  type_id = H5kind_to_type(KIND(dset_data_i32(1,1,1)), H5_INTEGER_KIND)
  CALL h5ltmake_dataset_f(file_id, dsetname16b, rank, dims, type_id, dset_data_i32, errcode)
  !
  !    (ii.b) read dataset using F90 interface
  !
  CALL h5ltread_dataset_f(file_id, dsetname16b, type_id, data_out_i32, dims, errcode)

  !
  ! compare read and write buffers.
  !
  DO i = 1, dims(1)
     DO j = 1, dims(2)
        DO k = 1, dims(3)
           IF ( dset_data_i32(i,j,k) .NE. data_out_i32(i,j,k) ) THEN
              PRINT *, 'read buffer differs from write buffer'
              PRINT *,  dset_data_i32(i,j,k), ' and ', data_out_i32(i,j,k) 
              STOP
           ENDIF
        END DO
     END DO
  ENDDO

  !
  !     (iii.a) write dataset using F90 H5LTmake_dataset_int_f interface
  !
  CALL h5ltmake_dataset_int_f(file_id, dsetname16c, rank, dims, dset_data_i32, errcode)

  !
  !     (iii.b) read dataset using F90 H5LTmake_dataset_int_f interface
  !
  CALL h5ltread_dataset_int_f(file_id, dsetname16c, data_out_i32, dims, errcode)

  !
  ! compare read and write buffers.
  !
  DO i = 1, dims(1)
     DO j = 1, dims(2)
        DO k = 1, dims(3)
           IF ( dset_data_i32(i,j,k) .NE. data_out_i32(i,j,k) ) THEN
              PRINT *, 'read buffer differs from write buffer'
              PRINT *,  dset_data_i32(i,j,k), ' and ', data_out_i32(i,j,k) 
              STOP
           ENDIF
        END DO
     END DO
  ENDDO

#endif

  !
  ! Close the file.
  !
  CALL h5fclose_f(file_id, errcode)

  !
  ! Close FORTRAN predefined datatypes.
  !
  CALL h5close_f(errcode)

  CALL passed()
  !
  ! end function.
  !
END SUBROUTINE test_dataset3D

!-------------------------------------------------------------------------
! test_datasetND
!-------------------------------------------------------------------------


SUBROUTINE test_datasetND(rank)

  USE, INTRINSIC :: ISO_C_BINDING
  USE H5LT ! module of H5LT
  USE HDF5 ! module of HDF5 library

  IMPLICIT NONE

  INTEGER            :: rank                                  ! Dataset rank

  INTEGER, PARAMETER :: DIM1 = 2                              ! columns
  INTEGER, PARAMETER :: DIM2 = 4                              ! rows
  INTEGER, PARAMETER :: DIM3 = 2                              ! layers
  INTEGER, PARAMETER :: DIM4 = 5                              ! columns
  INTEGER, PARAMETER :: DIM5 = 4                              ! rows
  INTEGER, PARAMETER :: DIM6 = 3                              ! layers
  INTEGER, PARAMETER :: DIM7 = 2                              ! layers
  CHARACTER(len=9), PARAMETER :: filename = "dsetf3.h5"       ! File name
  CHARACTER(LEN=5), PARAMETER :: dsetname2 = "dset2"          ! Dataset name
  CHARACTER(LEN=5), PARAMETER :: dsetname3 = "dset3"          ! Dataset name
  CHARACTER(LEN=5), PARAMETER :: dsetname4 = "dset4"          ! Dataset name
  CHARACTER(LEN=5), PARAMETER :: dsetname5 = "dset5"          ! Dataset name
  INTEGER(HID_T) :: file_id                                   ! File identifier
  INTEGER(HSIZE_T), DIMENSION(7) :: dims
  INTEGER(HSIZE_T), DIMENSION(7) :: dimsr                       ! Dataset dimensions
  INTEGER, ALLOCATABLE, DIMENSION(:,:,:,:) :: ibuf_4            ! Data buffer
  INTEGER, ALLOCATABLE, DIMENSION(:,:,:,:) :: ibufr_4           ! Data buffer
  INTEGER, ALLOCATABLE, DIMENSION(:,:,:,:,:), TARGET :: ibuf_5  ! Data buffer
  INTEGER, ALLOCATABLE, DIMENSION(:,:,:,:,:), TARGET :: ibufr_5 ! Data buffer
  INTEGER, ALLOCATABLE, DIMENSION(:,:,:,:,:,:) :: ibuf_6        ! Data buffer
  INTEGER, ALLOCATABLE, DIMENSION(:,:,:,:,:,:) :: ibufr_6       ! Data buffer
  INTEGER, ALLOCATABLE, DIMENSION(:,:,:,:,:,:,:) :: ibuf_7      ! Data buffer
  INTEGER, ALLOCATABLE, DIMENSION(:,:,:,:,:,:,:) :: ibufr_7     ! Data buffer
  REAL, ALLOCATABLE, DIMENSION(:,:,:,:), TARGET :: rbuf_4                ! Data buffer
  REAL, ALLOCATABLE, DIMENSION(:,:,:,:), TARGET :: rbufr_4               ! Data buffer
  REAL, ALLOCATABLE, DIMENSION(:,:,:,:,:), TARGET :: rbuf_5      ! Data buffer
  REAL, ALLOCATABLE, DIMENSION(:,:,:,:,:), TARGET :: rbufr_5     ! Data buffer
  REAL, ALLOCATABLE, DIMENSION(:,:,:,:,:,:), TARGET :: rbuf_6            ! Data buffer
  REAL, ALLOCATABLE, DIMENSION(:,:,:,:,:,:), TARGET :: rbufr_6           ! Data buffer
  REAL, ALLOCATABLE, DIMENSION(:,:,:,:,:,:,:), TARGET :: rbuf_7          ! Data buffer
  REAL, ALLOCATABLE, DIMENSION(:,:,:,:,:,:,:), TARGET :: rbufr_7         ! Data buffer
  DOUBLE PRECISION, ALLOCATABLE, DIMENSION(:,:,:,:), TARGET :: dbuf_4    ! Data buffer
  DOUBLE PRECISION, ALLOCATABLE, DIMENSION(:,:,:,:), TARGET :: dbufr_4            ! Data buffer
  DOUBLE PRECISION, ALLOCATABLE, DIMENSION(:,:,:,:,:), TARGET :: dbuf_5           ! Data buffer
  DOUBLE PRECISION, ALLOCATABLE, DIMENSION(:,:,:,:,:), TARGET :: dbufr_5          ! Data buffer
  DOUBLE PRECISION, ALLOCATABLE, DIMENSION(:,:,:,:,:,:), TARGET :: dbuf_6         ! Data buffer
  DOUBLE PRECISION, ALLOCATABLE, DIMENSION(:,:,:,:,:,:), TARGET :: dbufr_6        ! Data buffer
  DOUBLE PRECISION, ALLOCATABLE, DIMENSION(:,:,:,:,:,:,:), TARGET :: dbuf_7       ! Data buffer
  DOUBLE PRECISION, ALLOCATABLE, DIMENSION(:,:,:,:,:,:,:), TARGET :: dbufr_7      ! Data buffer
  CHARACTER(LEN=5), ALLOCATABLE, DIMENSION(:,:,:,:), TARGET :: cbuf_4            ! Data buffer
  CHARACTER(LEN=5), ALLOCATABLE, DIMENSION(:,:,:,:), TARGET :: cbufr_4           ! Data buffer
  CHARACTER(LEN=5), ALLOCATABLE, DIMENSION(:,:,:,:,:), TARGET :: cbuf_5          ! Data buffer
  CHARACTER(LEN=5), ALLOCATABLE, DIMENSION(:,:,:,:,:), TARGET :: cbufr_5         ! Data buffer
  CHARACTER(LEN=5), ALLOCATABLE, DIMENSION(:,:,:,:,:,:), TARGET :: cbuf_6        ! Data buffer
  CHARACTER(LEN=5), ALLOCATABLE, DIMENSION(:,:,:,:,:,:), TARGET :: cbufr_6       ! Data buffer
  CHARACTER(LEN=5), ALLOCATABLE, DIMENSION(:,:,:,:,:,:,:), TARGET :: cbuf_7      ! Data buffer
  CHARACTER(LEN=5), ALLOCATABLE, DIMENSION(:,:,:,:,:,:,:), TARGET :: cbufr_7     ! Data buffer
  INTEGER        :: errcode                            ! Error flag
  INTEGER(HSIZE_T) :: i, j, k, l, m, n, o, nn   ! general purpose integers
  INTEGER          :: type_class
  INTEGER(SIZE_T)  :: type_size
  CHARACTER(LEN=1) :: ichr1
  TYPE(C_PTR) :: f_ptr
  INTEGER(HID_T) :: type_id

  WRITE(ichr1,'(I1.1)') rank
  CALL test_begin(' Make/Read datasets ('//ichr1//'D)        ')
  !
  ! Initialize the data array.
  !
  IF(rank.EQ.4)THEN

     ALLOCATE(ibuf_4 (1:DIM1,1:DIM2,1:DIM3,1:DIM4))
     ALLOCATE(ibufr_4(1:DIM1,1:DIM2,1:DIM3,1:DIM4))
     ALLOCATE(rbuf_4 (1:DIM1,1:DIM2,1:DIM3,1:DIM4))
     ALLOCATE(rbufr_4(1:DIM1,1:DIM2,1:DIM3,1:DIM4))
     ALLOCATE(dbuf_4 (1:DIM1,1:DIM2,1:DIM3,1:DIM4))
     ALLOCATE(dbufr_4(1:DIM1,1:DIM2,1:DIM3,1:DIM4))
     ALLOCATE(cbuf_4 (1:DIM1,1:DIM2,1:DIM3,1:DIM4))
     ALLOCATE(cbufr_4(1:DIM1,1:DIM2,1:DIM3,1:DIM4))

     dims(1:7) = (/DIM1,DIM2,DIM3,DIM4,0,0,0/)

     nn = 1
     DO i = 1, DIM1
        DO j = 1, DIM2
           DO k = 1, DIM3
              DO l = 1, DIM4
                 ibuf_4(i,j,k,l) = INT(nn)
                 rbuf_4(i,j,k,l) = INT(nn)
                 dbuf_4(i,j,k,l) = INT(nn)
                 WRITE(cbuf_4(i,j,k,l),'(I5.5)') nn
                 nn = nn + 1
              END DO
           END DO
        END DO

     ENDDO

  ELSE IF(rank.EQ.5)THEN

     ALLOCATE(ibuf_5 (1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5))
     ALLOCATE(ibufr_5(1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5))
     ALLOCATE(rbuf_5 (1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5))
     ALLOCATE(rbufr_5(1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5))
     ALLOCATE(dbuf_5 (1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5))
     ALLOCATE(dbufr_5(1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5))
     ALLOCATE(cbuf_5 (1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5))
     ALLOCATE(cbufr_5(1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5))

     dims(1:7) = (/DIM1,DIM2,DIM3,DIM4,DIM5,0,0/)

     nn = 1
     DO i = 1, DIM1
        DO j = 1, DIM2
           DO k = 1, DIM3
              DO l = 1, DIM4
                 DO m = 1, DIM5
                    ibuf_5(i,j,k,l,m) = INT(nn)
                    rbuf_5(i,j,k,l,m) = INT(nn)
                    dbuf_5(i,j,k,l,m) = INT(nn)
                    WRITE(cbuf_5(i,j,k,l,m),'(I5.5)') nn
                    nn = nn + 1
                 END DO
              END DO
           END DO
        ENDDO
     ENDDO

  ELSE IF(rank.EQ.6)THEN

     ALLOCATE(ibuf_6 (1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5,1:DIM6))
     ALLOCATE(ibufr_6(1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5,1:DIM6))
     ALLOCATE(rbuf_6 (1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5,1:DIM6))
     ALLOCATE(rbufr_6(1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5,1:DIM6))
     ALLOCATE(dbuf_6 (1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5,1:DIM6))
     ALLOCATE(dbufr_6(1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5,1:DIM6))
     ALLOCATE(cbuf_6 (1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5,1:DIM6))
     ALLOCATE(cbufr_6(1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5,1:DIM6))

     dims(1:7) = (/DIM1,DIM2,DIM3,DIM4,DIM5,DIM6,0/)

     nn = 1
     DO i = 1, DIM1
        DO j = 1, DIM2
           DO k = 1, DIM3
              DO l = 1, DIM4
                 DO m = 1, DIM5
                    DO n = 1, DIM6
                       ibuf_6(i,j,k,l,m,n) = INT(nn)
                       rbuf_6(i,j,k,l,m,n) = INT(nn)
                       dbuf_6(i,j,k,l,m,n) = INT(nn)
                       WRITE(cbuf_6(i,j,k,l,m,n),'(I5.5)') nn
                       nn = nn + 1
                    END DO
                 END DO
              END DO
           ENDDO
        ENDDO
     ENDDO

  ELSE IF(rank.EQ.7)THEN

     ALLOCATE(ibuf_7 (1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5,1:DIM6,1:DIM7))
     ALLOCATE(ibufr_7(1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5,1:DIM6,1:DIM7))
     ALLOCATE(rbuf_7 (1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5,1:DIM6,1:DIM7))
     ALLOCATE(rbufr_7(1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5,1:DIM6,1:DIM7))
     ALLOCATE(dbuf_7 (1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5,1:DIM6,1:DIM7))
     ALLOCATE(dbufr_7(1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5,1:DIM6,1:DIM7))
     ALLOCATE(cbuf_7 (1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5,1:DIM6,1:DIM7))
     ALLOCATE(cbufr_7(1:DIM1,1:DIM2,1:DIM3,1:DIM4,1:DIM5,1:DIM6,1:DIM7))

     dims(1:7) = (/DIM1,DIM2,DIM3,DIM4,DIM5,DIM6,DIM7/)

     nn = 1
     DO i = 1, DIM1
        DO j = 1, DIM2
           DO k = 1, DIM3
              DO l = 1, DIM4
                 DO m = 1, DIM5
                    DO n = 1, DIM6
                       DO o = 1, DIM7
                          ibuf_7(i,j,k,l,m,n,o) = INT(nn)
                          rbuf_7(i,j,k,l,m,n,o) = INT(nn)
                          dbuf_7(i,j,k,l,m,n,o) = INT(nn)
                          WRITE(cbuf_7(i,j,k,l,m,n,o),'(I5.5)') nn
                          nn = nn + 1
                       END DO
                    END DO
                 END DO
              ENDDO
           ENDDO
        ENDDO
     ENDDO

  ENDIF

  !
  ! Initialize FORTRAN predefined datatypes.
  !
  CALL h5open_f(errcode)

  !
  ! Create a new file using default properties.
  !
  CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file_id, errcode)

  !-------------------------------------------------------------------------
  ! H5T_NATIVE_INT ND buffer
  !-------------------------------------------------------------------------

  !
  ! write dataset.
  !
  IF(rank.EQ.4)THEN
     CALL h5ltmake_dataset_f(file_id, dsetname2, rank, dims(1:rank), H5T_NATIVE_INTEGER, ibuf_4, errcode)
  ELSE IF(rank.EQ.5)THEN
     f_ptr = C_LOC(ibuf_5(1,1,1,1,1))
     CALL h5ltmake_dataset_f(file_id, dsetname2, rank, dims(1:rank), H5T_NATIVE_INTEGER, f_ptr, errcode)
  ELSE IF(rank.EQ.6)THEN
     CALL h5ltmake_dataset_f(file_id, dsetname2, rank, dims(1:rank), H5T_NATIVE_INTEGER, ibuf_6, errcode)
  ELSE IF(rank.EQ.7)THEN
     CALL h5ltmake_dataset_f(file_id, dsetname2, rank, dims(1:rank), H5T_NATIVE_INTEGER, ibuf_7, errcode)
  ENDIF


  !
  ! read dataset.
  !
  IF(rank.EQ.4)THEN
     CALL h5ltread_dataset_f(file_id, dsetname2, H5T_NATIVE_INTEGER, ibufr_4, dims(1:rank), errcode)
  ELSE IF(rank.EQ.5)THEN
     f_ptr = C_LOC(ibufr_5(1,1,1,1,1))
     CALL h5ltread_dataset_f(file_id, dsetname2, H5T_NATIVE_INTEGER, f_ptr, errcode)
  ELSE IF(rank.EQ.6)THEN
     CALL h5ltread_dataset_f(file_id, dsetname2, H5T_NATIVE_INTEGER, ibufr_6, dims(1:rank), errcode)
  ELSE IF(rank.EQ.7)THEN
     CALL h5ltread_dataset_f(file_id, dsetname2, H5T_NATIVE_INTEGER, ibufr_7, dims(1:rank), errcode)
  ENDIF

  !
  ! compare read and write buffers.
  !
  DO i = 1, dims(1)
     DO j = 1, dims(2)
        DO k = 1, dims(3)
           DO l = 1, dims(4)
              IF(rank.EQ.4)THEN
                 IF ( ibuf_4(i,j,k,l) .NE. ibufr_4(i,j,k,l) ) THEN
                    PRINT *, 'read buffer differs from write buffer'
                    PRINT *,  ibuf_4(i,j,k,l), ' and ', ibufr_4(i,j,k,l)
                    STOP
                 ENDIF
              ENDIF
              DO m = 1, dims(5)
                 IF(rank.EQ.5)THEN
                    IF ( ibuf_5(i,j,k,l,m) .NE. ibufr_5(i,j,k,l,m) ) THEN
                       PRINT *, 'read buffer differs from write buffer'
                       PRINT *,  ibuf_5(i,j,k,l,m), ' and ', ibufr_5(i,j,k,l,m)
                       STOP
                    ENDIF
                 ENDIF
                 DO n = 1, dims(6)
                    IF(rank.EQ.6)THEN
                       IF ( ibuf_6(i,j,k,l,m,n) .NE. ibufr_6(i,j,k,l,m,n) ) THEN
                          PRINT *, 'read buffer differs from write buffer'
                          PRINT *,  ibuf_6(i,j,k,l,m,n), ' and ', ibufr_6(i,j,k,l,m,n)
                          STOP
                       ENDIF
                    ENDIF
                    DO o = 1, dims(7)
                       IF(rank.EQ.7)THEN
                          IF ( ibuf_7(i,j,k,l,m,n,o) .NE. ibufr_7(i,j,k,l,m,n,o) ) THEN
                             PRINT *, 'read buffer differs from write buffer'
                             PRINT *,  ibuf_7(i,j,k,l,m,n,o), ' and ', ibufr_7(i,j,k,l,m,n,o)
                             STOP
                          ENDIF
                       ENDIF
                    ENDDO
                 ENDDO
              ENDDO
           ENDDO
        ENDDO
     ENDDO
  ENDDO
  !-------------------------------------------------------------------------
  ! H5T_NATIVE_REAL
  !-------------------------------------------------------------------------

  !
  ! write dataset.
  !
  IF(rank.EQ.4)THEN
     f_ptr = C_LOC(rbuf_4(1,1,1,1))
     CALL h5ltmake_dataset_f(file_id, dsetname3, rank, dims(1:rank), H5T_NATIVE_REAL, f_ptr, errcode)
     ! CALL h5ltmake_dataset_f(file_id, dsetname3, rank, dims(1:rank), H5T_NATIVE_REAL, rbuf_4, errcode)
  ELSE IF(rank.EQ.5)THEN
     f_ptr = C_LOC(rbuf_5(1,1,1,1,1))
     CALL h5ltmake_dataset_f(file_id, dsetname3, rank, dims(1:rank), H5T_NATIVE_REAL, f_ptr, errcode)
  ELSE IF(rank.EQ.6)THEN
     f_ptr = C_LOC(rbuf_6(1,1,1,1,1,1))
     CALL h5ltmake_dataset_f(file_id, dsetname3, rank, dims(1:rank), H5T_NATIVE_REAL, f_ptr, errcode)
     !CALL h5ltmake_dataset_f(file_id, dsetname3, rank, dims(1:rank), H5T_NATIVE_REAL, rbuf_6, errcode)
  ELSE IF(rank.EQ.7)THEN
     f_ptr = C_LOC(rbuf_7(1,1,1,1,1,1,1))
     CALL h5ltmake_dataset_f(file_id, dsetname3, rank, dims(1:rank), H5T_NATIVE_REAL, f_ptr, errcode)
     !CALL h5ltmake_dataset_f(file_id, dsetname3, rank, dims(1:rank), H5T_NATIVE_REAL, rbuf_7, errcode)
  ENDIF


  !
  ! read dataset.
  !
  IF(rank.EQ.4)THEN
     f_ptr = C_LOC(rbufr_4(1,1,1,1))
     CALL h5ltread_dataset_f(file_id, dsetname3, H5T_NATIVE_REAL, f_ptr, errcode)
  ELSE IF(rank.EQ.5)THEN
     f_ptr = C_LOC(rbufr_5(1,1,1,1,1))
     CALL h5ltread_dataset_f(file_id, dsetname3, H5T_NATIVE_REAL, f_ptr, errcode)
  ELSE IF(rank.EQ.6)THEN
     f_ptr = C_LOC(rbufr_6(1,1,1,1,1,1))
     CALL h5ltread_dataset_f(file_id, dsetname3, H5T_NATIVE_REAL, f_ptr, errcode)
  ELSE IF(rank.EQ.7)THEN
     f_ptr = C_LOC(rbufr_7(1,1,1,1,1,1,1))
     CALL h5ltread_dataset_f(file_id, dsetname3, H5T_NATIVE_REAL, f_ptr, errcode)
  ENDIF

  !
  ! compare read and write buffers.
  !
  DO i = 1, dims(1)
     DO j = 1, dims(2)
        DO k = 1, dims(3)
           DO l = 1, dims(4)
              IF(rank.EQ.4)THEN
                 IF ( rbuf_4(i,j,k,l) .NE. rbufr_4(i,j,k,l) ) THEN
                    PRINT *, 'read buffer differs from write buffer'
                    PRINT *,  rbuf_4(i,j,k,l), ' and ', rbufr_4(i,j,k,l)
                    STOP
                 ENDIF
              ENDIF
              DO m = 1, dims(5)
                 IF(rank.EQ.5)THEN
                    IF ( rbuf_5(i,j,k,l,m) .NE. rbufr_5(i,j,k,l,m) ) THEN
                       PRINT *, 'read buffer differs from write buffer'
                       PRINT *,  rbuf_5(i,j,k,l,m), ' and ', rbufr_5(i,j,k,l,m)
                       STOP
                    ENDIF
                 ENDIF
                 DO n = 1, dims(6)
                    IF(rank.EQ.6)THEN
                       IF ( rbuf_6(i,j,k,l,m,n) .NE. rbufr_6(i,j,k,l,m,n) ) THEN
                          PRINT *, 'read buffer differs from write buffer'
                          PRINT *,  rbuf_6(i,j,k,l,m,n), ' and ', rbufr_6(i,j,k,l,m,n)
                          STOP
                       ENDIF
                    ENDIF
                    DO o = 1, dims(7)
                       IF(rank.EQ.7)THEN
                          IF ( rbuf_7(i,j,k,l,m,n,o) .NE. rbufr_7(i,j,k,l,m,n,o) ) THEN
                             PRINT *, 'read buffer differs from write buffer'
                             PRINT *,  rbuf_7(i,j,k,l,m,n,o), ' and ', rbufr_7(i,j,k,l,m,n,o)
                             STOP
                          ENDIF
                       ENDIF
                    ENDDO
                 ENDDO
              ENDDO
           ENDDO
        ENDDO
     ENDDO
  ENDDO

  !-------------------------------------------------------------------------
  ! H5T_NATIVE_DOUBLE
  !-------------------------------------------------------------------------

  !
  ! write dataset.
  !
  IF(rank.EQ.4)THEN
     f_ptr = C_LOC(dbuf_4(1,1,1,1))
     CALL h5ltmake_dataset_f(file_id, dsetname4, rank, dims(1:rank), H5T_NATIVE_DOUBLE, f_ptr, errcode)
  ELSE IF(rank.EQ.5)THEN
     f_ptr = C_LOC(dbuf_5(1,1,1,1,1))
     CALL h5ltmake_dataset_f(file_id, dsetname4, rank, dims(1:rank), H5T_NATIVE_DOUBLE, f_ptr, errcode)
  ELSE IF(rank.EQ.6)THEN
     f_ptr = C_LOC(dbuf_6(1,1,1,1,1,1))
     CALL h5ltmake_dataset_f(file_id, dsetname4, rank, dims(1:rank), H5T_NATIVE_DOUBLE, f_ptr, errcode)
  ELSE IF(rank.EQ.7)THEN
     f_ptr = C_LOC(dbuf_7(1,1,1,1,1,1,1))
     CALL h5ltmake_dataset_f(file_id, dsetname4, rank, dims(1:rank), H5T_NATIVE_DOUBLE, f_ptr, errcode)
  ENDIF

  !
  ! read dataset.
  !
  IF(rank.EQ.4)THEN
     f_ptr = C_LOC(dbufr_4(1,1,1,1))
     CALL h5ltread_dataset_f(file_id, dsetname4, H5T_NATIVE_DOUBLE, f_ptr, errcode)
  ELSE IF(rank.EQ.5)THEN
     f_ptr = C_LOC(dbufr_5(1,1,1,1,1))
     CALL h5ltread_dataset_f(file_id, dsetname4, H5T_NATIVE_DOUBLE, f_ptr, errcode)
  ELSE IF(rank.EQ.6)THEN
     f_ptr = C_LOC(dbufr_6(1,1,1,1,1,1))
     CALL h5ltread_dataset_f(file_id, dsetname4, H5T_NATIVE_DOUBLE, f_ptr, errcode)
  ELSE IF(rank.EQ.7)THEN
     f_ptr = C_LOC(dbufr_7(1,1,1,1,1,1,1))
     CALL h5ltread_dataset_f(file_id, dsetname4, H5T_NATIVE_DOUBLE, f_ptr, errcode)
  ENDIF

  !
  ! compare read and write buffers.
  !
  DO i = 1, dims(1)
     DO j = 1, dims(2)
        DO k = 1, dims(3)
           DO l = 1, dims(4)
              IF(rank.EQ.4)THEN
                 IF ( dbuf_4(i,j,k,l) .NE. dbufr_4(i,j,k,l) ) THEN
                    PRINT *, 'read buffer differs from write buffer'
                    PRINT *,  dbuf_4(i,j,k,l), ' and ', dbufr_4(i,j,k,l)
                    STOP
                 ENDIF
              ENDIF
              DO m = 1, dims(5)
                 IF(rank.EQ.5)THEN
                    IF ( dbuf_5(i,j,k,l,m) .NE. dbufr_5(i,j,k,l,m) ) THEN
                       PRINT *, 'read buffer differs from write buffer'
                       PRINT *,  dbuf_5(i,j,k,l,m), ' and ', dbufr_5(i,j,k,l,m)
                       STOP
                    ENDIF
                 ENDIF
                 DO n = 1, dims(6)
                    IF(rank.EQ.6)THEN
                       IF ( dbuf_6(i,j,k,l,m,n) .NE. dbufr_6(i,j,k,l,m,n) ) THEN
                          PRINT *, 'read buffer differs from write buffer'
                          PRINT *,  dbuf_6(i,j,k,l,m,n), ' and ', dbufr_6(i,j,k,l,m,n)
                          STOP
                       ENDIF
                    ENDIF
                    DO o = 1, dims(7)
                       IF(rank.EQ.7)THEN
                          IF ( dbuf_7(i,j,k,l,m,n,o) .NE. dbufr_7(i,j,k,l,m,n,o) ) THEN
                             PRINT *, 'read buffer differs from write buffer'
                             PRINT *,  dbuf_7(i,j,k,l,m,n,o), ' and ', dbufr_7(i,j,k,l,m,n,o)
                             STOP
                          ENDIF
                       ENDIF
                    ENDDO
                 ENDDO
              ENDDO
           ENDDO
        ENDDO
     ENDDO
  ENDDO

  !-------------------------------------------------------------------------
  ! H5T_NATIVE_CHARACTER ND buffer
  !-------------------------------------------------------------------------

  CALL H5Tcopy_f(H5T_FORTRAN_S1, type_id, errcode)
  CALL H5Tset_size_f(type_id, 5_SIZE_T, errcode)
  !
  ! write dataset.
  !
  IF(rank.EQ.4)THEN
     f_ptr = C_LOC(cbuf_4(1,1,1,1)(1:1))
     CALL h5ltmake_dataset_f(file_id, dsetname5, rank, dims(1:rank), type_id, f_ptr, errcode)
  ELSE IF(rank.EQ.5)THEN
     f_ptr = C_LOC(cbuf_5(1,1,1,1,1)(1:1))
     CALL h5ltmake_dataset_f(file_id, dsetname5, rank, dims(1:rank), type_id, f_ptr, errcode)
  ELSE IF(rank.EQ.6)THEN
     f_ptr = C_LOC(cbuf_6(1,1,1,1,1,1)(1:1))
     CALL h5ltmake_dataset_f(file_id, dsetname5, rank, dims(1:rank), type_id, f_ptr, errcode)
  ELSE IF(rank.EQ.7)THEN
     f_ptr = C_LOC(cbuf_7(1,1,1,1,1,1,1)(1:1))
     CALL h5ltmake_dataset_f(file_id, dsetname5, rank, dims(1:rank), type_id, f_ptr, errcode)
  ENDIF

  !
  ! read dataset.
  !
  IF(rank.EQ.4)THEN
     f_ptr = C_LOC(cbufr_4(1,1,1,1)(1:1))
     CALL h5ltread_dataset_f(file_id, dsetname5, type_id, f_ptr, errcode)
  ELSE IF(rank.EQ.5)THEN
     f_ptr = C_LOC(cbufr_5(1,1,1,1,1)(1:1))
     CALL h5ltread_dataset_f(file_id, dsetname5, type_id, f_ptr, errcode)
  ELSE IF(rank.EQ.6)THEN
     f_ptr = C_LOC(cbufr_6(1,1,1,1,1,1)(1:1))
     CALL h5ltread_dataset_f(file_id, dsetname5, type_id, f_ptr, errcode)
  ELSE IF(rank.EQ.7)THEN
     f_ptr = C_LOC(cbufr_7(1,1,1,1,1,1,1)(1:1))
     CALL h5ltread_dataset_f(file_id, dsetname5, type_id, f_ptr, errcode)
  ENDIF


  !
  ! compare read and write buffers.
  !
  DO i = 1, dims(1)
     DO j = 1, dims(2)
        DO k = 1, dims(3)
           DO l = 1, dims(4)
              IF(rank.EQ.4)THEN
                 IF ( cbuf_4(i,j,k,l) .NE. cbufr_4(i,j,k,l) ) THEN
                    PRINT *, 'read buffer differs from write buffer (character)'
                    PRINT *,  cbuf_4(i,j,k,l), ' and ', cbufr_4(i,j,k,l)
                    STOP
                 ENDIF
              ENDIF
              DO m = 1, dims(5)
                 IF(rank.EQ.5)THEN
                    IF ( cbuf_5(i,j,k,l,m) .NE. cbufr_5(i,j,k,l,m) ) THEN
                       PRINT *, 'read buffer differs from write buffer (character)'
                       PRINT *,  cbuf_5(i,j,k,l,m), ' and ', cbufr_5(i,j,k,l,m)
                       STOP
                    ENDIF
                 ENDIF
                 DO n = 1, dims(6)
                    IF(rank.EQ.6)THEN
                       IF ( cbuf_6(i,j,k,l,m,n) .NE. cbufr_6(i,j,k,l,m,n) ) THEN
                          PRINT *, 'read buffer differs from write buffer (character)'
                          PRINT *,  cbuf_6(i,j,k,l,m,n), ' and ', cbufr_6(i,j,k,l,m,n)
                          STOP
                       ENDIF
                    ENDIF
                    DO o = 1, dims(7)
                       IF(rank.EQ.7)THEN
                          IF ( cbuf_7(i,j,k,l,m,n,o) .NE. cbufr_7(i,j,k,l,m,n,o) ) THEN
                             PRINT *, 'read buffer differs from write buffer (character)'
                             PRINT *,  cbuf_7(i,j,k,l,m,n,o), ' and ', cbufr_7(i,j,k,l,m,n,o)
                             STOP
                          ENDIF
                       ENDIF
                    ENDDO
                 ENDDO
              ENDDO
           ENDDO
        ENDDO
     ENDDO
  ENDDO

  CALL h5ltget_dataset_info_f(file_id,dsetname4,dimsr,type_class,type_size,errcode )

  CALL h5tclose_f(type_id,errcode)

  !
  ! compare dimensions
  !
  DO i = 1, rank
     IF ( dimsr(i) .NE. dims(i) ) THEN
        PRINT *, 'dimensions differ '
        STOP
     ENDIF
  END DO

  !
  ! Close the file.
  !
  CALL h5fclose_f(file_id, errcode)

  !
  ! Close FORTRAN predefined datatypes.
  !
  CALL h5close_f(errcode)

  ! DEALLOCATE RESOURCES

  IF(rank.EQ.4)THEN
     DEALLOCATE(ibuf_4, ibufr_4, rbuf_4, rbufr_4, dbuf_4, dbufr_4, cbuf_4, cbufr_4)
  ELSE IF(rank.EQ.5)THEN
     DEALLOCATE(ibuf_5, ibufr_5, rbuf_5, rbufr_5, dbuf_5, dbufr_5, cbuf_5, cbufr_5)
  ELSE IF(rank.EQ.6)THEN
     DEALLOCATE(ibuf_6, ibufr_6, rbuf_6, rbufr_6, dbuf_6, dbufr_6, cbuf_6, cbufr_6)
  ELSE IF(rank.EQ.7)THEN
     DEALLOCATE(ibuf_7, ibufr_7, rbuf_7, rbufr_7, dbuf_7, dbufr_7, cbuf_7, cbufr_7)
  ENDIF

  CALL passed()
  !
  ! end function.
  !
END SUBROUTINE test_datasetND


!-------------------------------------------------------------------------
! test_datasets
!-------------------------------------------------------------------------

SUBROUTINE test_datasets()

  USE, INTRINSIC :: ISO_C_BINDING
  USE H5LT ! module of H5LT
  USE HDF5 ! module of HDF5 library

  IMPLICIT NONE

  CHARACTER(len=9), PARAMETER :: filename = "dsetf4.h5"! File name
  INTEGER(HID_T) :: file_id                            ! File identifier
  INTEGER        :: errcode                            ! Error flag
  INTEGER, PARAMETER :: DIM1 = 10                      ! Dimension of array
  CHARACTER(LEN=5), PARAMETER :: dsetname1 = "dset1"   ! Dataset name
  CHARACTER(LEN=5), PARAMETER :: dsetname2 = "dset2"   ! Dataset name
  CHARACTER(LEN=5), PARAMETER :: dsetname3 = "dset3"   ! Dataset name
  CHARACTER(LEN=5), PARAMETER :: dsetname4 = "dset4"   ! Dataset name
  CHARACTER(LEN=5), PARAMETER :: dsetname5 = "dset5"   ! Dataset name
  INTEGER(HSIZE_T), DIMENSION(1) :: dims = (/DIM1/)    ! Dataset dimensions
  INTEGER(HSIZE_T), DIMENSION(1) :: dimsr              ! Dataset dimensions
  INTEGER        :: rank = 1                           ! Dataset rank
  INTEGER        :: rankr                              ! Dataset rank
  CHARACTER(LEN=8), PARAMETER :: buf1 = "mystring"     ! Data buffer
  CHARACTER(LEN=8)            :: buf1r                 ! Data buffer
  INTEGER, DIMENSION(DIM1)          :: buf2            ! Data buffer
  INTEGER, DIMENSION(DIM1)          :: bufr2           ! Data buffer
  REAL, DIMENSION(DIM1), TARGET             :: buf3    ! Data buffer
  REAL, DIMENSION(DIM1) , TARGET            :: bufr3   ! Data buffer
  DOUBLE PRECISION, DIMENSION(DIM1), TARGET :: buf4    ! Data buffer
  DOUBLE PRECISION, DIMENSION(DIM1), TARGET :: bufr4   ! Data buffer
  INTEGER          :: i, n                             ! general purpose integer
  INTEGER          :: has                              ! general purpose integer
  INTEGER          :: type_class
  INTEGER(SIZE_T)  :: type_size
  LOGICAL :: path_valid  ! status of the path
  CHARACTER(LEN=6) :: chr_exact
  CHARACTER(LEN=8) :: chr_lg
  TYPE(C_PTR) :: f_ptr

  !
  ! Initialize FORTRAN predefined datatypes.
  !
  CALL h5open_f(errcode)

  !
  ! Create a new file using default properties.
  !
  CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file_id, errcode)

  !
  ! Initialize the data array.
  !
  n = 1
  DO i = 1, DIM1
     buf2(i) = n
     buf3(i) = n
     buf4(i) = n
     n = n + 1
  END DO

  !-------------------------------------------------------------------------
  ! int
  !-------------------------------------------------------------------------

  CALL test_begin(' Make/Read datasets (integer)   ')

  !
  ! write dataset.
  !
  CALL h5ltmake_dataset_int_f(file_id, dsetname2, rank, dims, buf2, errcode)

  !
  ! read dataset.
  !
  CALL h5ltread_dataset_int_f(file_id, dsetname2, bufr2, dims, errcode)

  !
  ! compare read and write buffers.
  !
  DO i = 1, DIM1
     IF ( buf2(i) .NE. bufr2(i) ) THEN
        PRINT *, 'read buffer differs from write buffer'
        PRINT *,  bufr2(i), ' and ',   buf2(i)
        STOP
     ENDIF
  END DO

  CALL passed()


  !-------------------------------------------------------------------------
  ! real
  !-------------------------------------------------------------------------

  CALL test_begin(' Make/Read datasets (float)     ')


  !
  ! write dataset.
  !
  f_ptr = C_LOC(buf3(1))
  CALL h5ltmake_dataset_f(file_id, dsetname3, rank, dims, H5T_NATIVE_REAL, f_ptr, errcode)

  !
  ! read dataset.
  !
  f_ptr = C_LOC(bufr3(1))
  CALL h5ltread_dataset_f(file_id, dsetname3, H5T_NATIVE_REAL, f_ptr, errcode)

  !
  ! compare read and write buffers.
  !
  DO i = 1, DIM1
     IF ( buf3(i) .NE. bufr3(i) ) THEN
        PRINT *, 'read buffer differs from write buffer'
        PRINT *,  bufr3(i), ' and ',   buf3(i)
        STOP
     ENDIF
  END DO

  CALL passed()

  !-------------------------------------------------------------------------
  ! double
  !-------------------------------------------------------------------------

  CALL test_begin(' Make/Read datasets (double)    ')


  !
  ! write dataset.
  !
  !f_ptr = C_LOC(buf4(1))
  !CALL h5ltmake_dataset_f(file_id, dsetname4, rank, dims, H5T_NATIVE_DOUBLE, f_ptr, errcode)
  CALL h5ltmake_dataset_double_f(file_id, dsetname4, rank, dims, buf4, errcode)

  !
  ! read dataset.
  !
  !f_ptr = C_LOC(buf4(1))
  !CALL h5ltread_dataset_f(file_id, dsetname4, H5T_NATIVE_DOUBLE, f_ptr, errcode)
  CALL h5ltread_dataset_double_f(file_id, dsetname4, bufr4, dims, errcode)


  !
  ! compare read and write buffers.
  !
  DO i = 1, DIM1
     IF ( buf4(i) .NE. bufr4(i) ) THEN
        PRINT *, 'read buffer differs from write buffer'
        PRINT *,  bufr4(i), ' and ',   buf4(i)
        STOP
     ENDIF
  END DO

  CALL passed()


  !-------------------------------------------------------------------------
  ! string
  !-------------------------------------------------------------------------

  CALL test_begin(' Make/Read datasets (string)    ')


  !
  ! write dataset.
  !
  CALL h5ltmake_dataset_string_f(file_id, dsetname5, buf1, errcode)

  !
  ! read dataset.
  !
  CALL h5ltread_dataset_string_f(file_id, dsetname5, buf1r, errcode)

  !
  ! compare read and write buffers.
  !
  IF ( buf1 .NE. buf1r ) THEN
     PRINT *, 'read buffer differs from write buffer'
     PRINT *,  buf1, ' and ',   buf1r
     STOP
  ENDIF

  CALL passed()

  CALL test_begin(' Test h5ltpath_valid_f          ')
  !
  ! test function h5ltpath_valid_f
  !
  chr_exact = "/"//dsetname2 ! test character buffer the exact size needed
  CALL h5ltpath_valid_f(file_id, chr_exact, .TRUE., path_valid, errcode)
  IF(errcode.LT.0.OR..NOT.path_valid)THEN
     PRINT *, 'error in h5ltpath_valid_f'
     STOP
  ENDIF
  chr_lg = "/"//dsetname2 ! test character buffer larger then needed
  CALL h5ltpath_valid_f(file_id, chr_lg, .TRUE., path_valid, errcode)
  IF(errcode.LT.0.OR..NOT.path_valid)THEN
     PRINT *, 'error in h5ltpath_valid_f'
     STOP
  ENDIF

  CALL h5ltpath_valid_f(file_id, chr_lg, .FALSE., path_valid, errcode)
  IF(errcode.LT.0.OR..NOT.path_valid)THEN
     PRINT *, 'error in h5ltpath_valid_f'
     STOP
  ENDIF

  ! Should fail, dataset does not exist
  CALL h5ltpath_valid_f(file_id, "/"//dsetname2//"junk", .TRUE., path_valid, errcode)
  IF(errcode.LT.0.OR.path_valid)THEN
     PRINT *, 'error in h5ltpath_valid_f'
     STOP
  ENDIF

  CALL h5ltpath_valid_f(file_id, "/"//dsetname2//"junk", .FALSE., path_valid, errcode)
  IF(errcode.LT.0.OR.path_valid)THEN
     PRINT *, 'error in h5ltpath_valid_f'
     STOP
  ENDIF

  ! Create a dangling soft link
  CALL h5lcreate_soft_f("/G2", file_id, "/G3", errcode)

  ! Should pass, does not check for dangled link
  CALL h5ltpath_valid_f(file_id, "/G3", .FALSE., path_valid, errcode)
  IF(.NOT.path_valid)THEN
     PRINT *, 'error in h5ltpath_valid_f'
     STOP
  ENDIF

  ! Should fail, dangled link
  CALL h5ltpath_valid_f(file_id, "/G2", .TRUE., path_valid, errcode)
  IF(path_valid)THEN
     PRINT *, 'error in h5ltpath_valid_f'
     STOP
  ENDIF

  CALL passed()


  CALL test_begin(' Get dataset dimensions/info    ')

  !-------------------------------------------------------------------------
  ! h5ltget_dataset_ndims_f
  !-------------------------------------------------------------------------

  CALL h5ltget_dataset_ndims_f(file_id, dsetname4, rankr, errcode)
  IF ( rankr .NE. rank ) THEN
     PRINT *, 'h5ltget_dataset_ndims_f return error'
     STOP
  ENDIF

  !-------------------------------------------------------------------------
  ! test h5ltfind_dataset_f function
  !-------------------------------------------------------------------------


  has = h5ltfind_dataset_f(file_id,dsetname4)
  IF ( has .NE. 1 ) THEN
     PRINT *, 'h5ltfind_dataset_f return error'
     STOP
  ENDIF

  !-------------------------------------------------------------------------
  ! test h5ltget_dataset_info_f function
  !-------------------------------------------------------------------------

  CALL h5ltget_dataset_info_f(file_id,dsetname4,dimsr,type_class,type_size,errcode )

  !
  ! compare dimensions
  !
  DO i = 1, rank
     IF ( dimsr(i) .NE. dims(i) ) THEN
        PRINT *, 'dimensions differ '
        STOP
     ENDIF
  END DO

  IF ( type_class .NE. 1 ) THEN ! H5T_FLOAT
     PRINT *, 'wrong type class '
     STOP
  ENDIF

  !
  ! Close the file.
  !
  CALL h5fclose_f(file_id, errcode)
  !
  ! Close FORTRAN predefined datatypes.
  !
  CALL h5close_f(errcode)

  CALL passed()
  !
  ! end function.
  !
END SUBROUTINE test_datasets



!-------------------------------------------------------------------------
! test_attributes
!-------------------------------------------------------------------------

SUBROUTINE test_attributes()

  USE, INTRINSIC :: ISO_C_BINDING
  USE H5LT ! module of H5LT
  USE HDF5 ! module of HDF5 library

  IMPLICIT NONE

  CHARACTER(len=9), PARAMETER :: filename = "dsetf5.h5"! File name
  CHARACTER(len=9), PARAMETER :: filename1 ="tattr.h5" ! C written attribute file
  INTEGER(HID_T) :: file_id                            ! File identifier
  !  INTEGER(HID_T) :: file_id1
  INTEGER, PARAMETER :: DIM1 = 10                     ! Dimension of array
  CHARACTER(LEN=5), PARAMETER :: attrname1 = "attr1"   ! Attribute name
  CHARACTER(LEN=5), PARAMETER :: attrname2 = "attr2"   ! Attribute name
  CHARACTER(LEN=5), PARAMETER :: attrname3 = "attr3"   ! Attribute name
  CHARACTER(LEN=5), PARAMETER :: attrname4 = "attr4"   ! Attribute name
  CHARACTER(LEN=5), PARAMETER :: attrname5 = "attr5"   ! Attribute name
  CHARACTER(LEN=8), PARAMETER :: buf1 = "mystring"     ! Data buffer
  CHARACTER(LEN=16), PARAMETER :: buf_c = "string attribute"
  CHARACTER(LEN=8)                  :: bufr1           ! Data buffer
  CHARACTER(LEN=10)                 :: bufr1_lg        ! Data buffer
  !  CHARACTER(LEN=16)                 :: bufr_c          ! Data buffer
  !  CHARACTER(LEN=18)                 :: bufr_c_lg       ! Data buffer
  INTEGER, DIMENSION(DIM1)          :: buf2            ! Data buffer
  INTEGER, DIMENSION(DIM1)          :: bufr2           ! Data buffer
  REAL, DIMENSION(DIM1), target     :: buf3            ! Data buffer
  REAL, DIMENSION(DIM1), target     :: bufr3           ! Data buffer
  DOUBLE PRECISION, DIMENSION(DIM1), TARGET :: buf4            ! Data buffer
  DOUBLE PRECISION, DIMENSION(DIM1), TARGET :: bufr4           ! Data buffer
  INTEGER        :: errcode                            ! Error flag
  INTEGER        :: i, n                               ! general purpose integer
  INTEGER(SIZE_T) size                                 ! size of attribute array
  INTEGER        :: rankr                              ! rank
  INTEGER(HSIZE_T), DIMENSION(1) :: dimsr              ! attribute dimensions
  INTEGER          :: type_class
  INTEGER(SIZE_T)  :: type_size
  INTEGER(HSIZE_T), DIMENSION(1) :: dims = (/DIM1/)    ! Dataset dimensions
  INTEGER        :: rank = 1                           ! Dataset rank
  CHARACTER(LEN=5), PARAMETER :: dsetname1 = "dset1"   ! Dataset name
  INTEGER, DIMENSION(DIM1)    :: buf                   ! Data buffer
  INTEGER(SIZE_T)  :: SizeOf_buf_type
  TYPE(C_PTR) :: f_ptr

  !
  ! Initialize FORTRAN predefined datatypes.
  !
  CALL h5open_f(errcode)
  !
  ! Create a new file using default properties.
  !
  CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file_id, errcode)
  !
  ! make a dataset.
  !
  CALL h5ltmake_dataset_int_f(file_id, dsetname1, rank, dims, buf, errcode)

  !
  ! Initialize the data array.
  !
  size = DIM1
  n = 1
  DO i = 1, DIM1
     buf2(i) = n
     buf3(i) = n
     buf4(i) = n
     n = n + 1
  END DO


  !-------------------------------------------------------------------------
  ! int
  !-------------------------------------------------------------------------

  CALL test_begin(' Set/Get attributes int         ')


  !
  ! write attribute.
  !
  CALL h5ltset_attribute_int_f(file_id,dsetname1,attrname2,buf2,size,errcode)

  !
  ! read attribute.
  !
  CALL h5ltget_attribute_int_f(file_id,dsetname1,attrname2,bufr2,errcode)

  !
  ! compare read and write buffers.
  !
  DO i = 1, DIM1
     IF ( buf2(i) .NE. bufr2(i) ) THEN
        PRINT *, 'read buffer differs from write buffer'
        PRINT *,  bufr2(i), ' and ',   buf2(i)
        STOP
     ENDIF
  END DO

  CALL passed()

  !-------------------------------------------------------------------------
  ! float
  !-------------------------------------------------------------------------

  CALL test_begin(' Set/Get attributes float       ')


  !
  ! write attribute.
  !
#ifdef H5_FORTRAN_HAVE_STORAGE_SIZE
  SizeOf_buf_type = STORAGE_SIZE(buf3(1), c_size_t)/STORAGE_SIZE(c_char_'a',c_size_t)
#else
  SizeOf_buf_type = SIZEOF(buf3(1))
#endif
  f_ptr = C_LOC(buf3(1))
  CALL h5ltset_attribute_f(file_id,dsetname1,attrname3,f_ptr,"REAL", SizeOf_buf_type, size,errcode)
  !CALL h5ltset_attribute_float_f(file_id,dsetname1,attrname3,buf3,size,errcode)
  !
  ! read attribute.
  !
#ifdef H5_FORTRAN_HAVE_STORAGE_SIZE
  SizeOf_buf_type = STORAGE_SIZE(bufr3(1), c_size_t)/STORAGE_SIZE(c_char_'a',c_size_t)
#else
  SizeOf_buf_type = SIZEOF(bufr3(1))
#endif

  f_ptr = C_LOC(bufr3(1))
  CALL h5ltget_attribute_f(file_id,dsetname1,attrname3,f_ptr,"REAL",SizeOf_buf_type,errcode)
  !CALL h5ltget_attribute_float_f(file_id,dsetname1,attrname3,bufr3,errcode)

  !
  ! compare read and write buffers.
  !
  DO i = 1, DIM1
     IF ( buf3(i) .NE. bufr3(i) ) THEN
        PRINT *, 'read buffer differs from write buffer'
        PRINT *,  bufr3(i), ' and ',   buf3(i)
        STOP
     ENDIF
  END DO

  CALL passed()

  !-------------------------------------------------------------------------
  ! double
  !-------------------------------------------------------------------------

#ifdef H5_FORTRAN_HAVE_STORAGE_SIZE
  SizeOf_buf_type = STORAGE_SIZE(buf4(1), c_size_t)/STORAGE_SIZE(c_char_'a',c_size_t)
#else
  SizeOf_buf_type = SIZEOF(buf4(1))
#endif

  IF(SizeOf_buf_type.LT.16)THEN ! MSB can't handle 16 byte reals

     CALL test_begin(' Set/Get attributes double      ')

     !
     ! write attribute.
     !
     f_ptr = C_LOC(buf4(1))
     CALL h5ltset_attribute_f(file_id,dsetname1,attrname4,f_ptr,"real", SizeOf_buf_type, size, errcode)

     !  CALL h5ltset_attribute_double_f(file_id,dsetname1,attrname4,buf4, size, errcode)

     !
     ! read attribute.
     !

#ifdef H5_FORTRAN_HAVE_STORAGE_SIZE
     SizeOf_buf_type = STORAGE_SIZE(bufr4(1), c_size_t)/STORAGE_SIZE(c_char_'a',c_size_t)
#else
     SizeOf_buf_type = SIZEOF(bufr4(1))
#endif

     f_ptr = C_LOC(bufr4(1))
     CALL h5ltget_attribute_f(file_id,dsetname1,attrname4,f_ptr,"REAL",SizeOf_buf_type,errcode)

     !
     ! compare read and write buffers.
     !
     DO i = 1, DIM1
        IF ( buf4(i) .NE. bufr4(i) ) THEN
           PRINT *, 'read buffer differs from write buffer'
           PRINT *,  bufr4(i), ' and ',   buf4(i)
           STOP
        ENDIF
     END DO

     CALL passed()

  ENDIF

  !-------------------------------------------------------------------------
  ! string
  !-------------------------------------------------------------------------

  CALL test_begin(' Set/Get attributes string      ')

  !
  ! write attribute.
  !
  CALL h5ltset_attribute_string_f(file_id,dsetname1,attrname5,buf1,errcode)

  !
  ! read attribute into a fortran character buf that is the same size as buf1.
  !
  CALL h5ltget_attribute_string_f(file_id,dsetname1,attrname5,bufr1,errcode)

  !
  ! compare read and write buffers.
  !
  IF ( buf1 .NE. bufr1 ) THEN
     PRINT *, 'read buffer differs from write buffer'
     PRINT *,  buf1, ' and ',   bufr1
     STOP
  ENDIF

  !
  ! read attribute into a fortran character buf that is larger then buf1.
  !
  CALL h5ltget_attribute_string_f(file_id,dsetname1,attrname5,bufr1_lg,errcode)

  !
  ! compare read and write buffers, make sure C NULL character was removed.
  !
  IF ( buf1(1:8) .NE. bufr1_lg(1:8) .AND. bufr1_lg(9:10) .NE. '  ' ) THEN
     PRINT *, 'larger read buffer differs from write buffer'
     PRINT *,  buf1, ' and ',   bufr1_lg
     STOP
  ENDIF

  ! 
  ! ** Test reading a string that was created with a C program **
  !

!!$  CALL h5fopen_f(filename1, H5F_ACC_RDONLY_F, file_id1, errcode)
!!$
!!$  CALL h5ltget_attribute_string_f(file_id1, "/", "attr5", bufr_c, errcode)
!!$  !
!!$  ! compare read and write buffers.
!!$  !
!!$  IF ( bufr_c .NE. buf_c ) THEN
!!$     PRINT *, 'read buffer differs from write buffer'
!!$     PRINT *,  bufr1, ' and ',  buf_c 
!!$     STOP
!!$  ENDIF
!!$  !
!!$  ! read attribute into a fortran character buf that is larger then buf_c.
!!$  !
!!$  CALL h5ltget_attribute_string_f(file_id1, "/", "attr5", bufr_c_lg, errcode)
!!$
!!$  !
!!$  ! compare read and write buffers, make sure C NULL character was removed.
!!$  !
!!$  IF ( buf_c(1:16) .NE. bufr_c_lg(1:16) .AND. bufr_c_lg(17:18) .NE. '  ' ) THEN
!!$     PRINT *, 'larger read buffer differs from write buffer'
!!$     PRINT *,  buf_c, ' and ',  bufr_c_lg 
!!$     STOP
!!$  ENDIF  

!!$  CALL h5fclose_f(file_id1,  errcode)

  CALL passed()

  !-------------------------------------------------------------------------
  ! get attribute rank
  !-------------------------------------------------------------------------

  CALL test_begin(' Get attribute rank/info        ')


  CALL h5ltget_attribute_ndims_f(file_id,dsetname1,attrname2,rankr,errcode)

  IF ( rankr .NE. 1 ) THEN
     PRINT *, 'h5ltget_attribute_ndims_f return error'
     STOP
  ENDIF


  CALL h5ltget_attribute_info_f(file_id,dsetname1,attrname2,dimsr,type_class,type_size,errcode)

  !
  ! compare dimensions
  !
  DO i = 1, rank
     IF ( dimsr(i) .NE. dims(i) ) THEN
        PRINT *, 'dimensions differ '
        STOP
     ENDIF
  END DO


  !
  ! Close the file.
  !
  CALL h5fclose_f(file_id, errcode)
  !
  ! Close FORTRAN predefined datatypes.
  !
  CALL h5close_f(errcode)

  CALL passed()
  !
  ! end function.
  !
END SUBROUTINE test_attributes

!-------------------------------------------------------------------------
! test_begin
!-------------------------------------------------------------------------

SUBROUTINE test_begin(string)
  CHARACTER(LEN=*), INTENT(IN) :: string
  WRITE(*, fmt = '(14a)', advance = 'no') string
  WRITE(*, fmt = '(40x,a)', advance = 'no') ' '
END SUBROUTINE test_begin

!-------------------------------------------------------------------------
! passed
!-------------------------------------------------------------------------

SUBROUTINE passed()
  WRITE(*, fmt = '(6a)')  'PASSED'
END SUBROUTINE passed
