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19_rwdset_fortran2003.f90
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! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
! 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. *
! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
!
!
! The following example shows how to write and read to/from an existing dataset.
! It opens the file created in the previous example, obtains the dataset
! identifier, writes the data to the dataset in the file,
! then reads the dataset to memory. Uses updated Fortran 2003 interface
! with different KINDs of integers and reals.
!
PROGRAM RWDSET_FORTRAN2003
USE ISO_C_BINDING
USE HDF5 ! This module contains all necessary modules
IMPLICIT NONE
INTEGER, PARAMETER :: int_kind_1 = SELECTED_INT_KIND(Fortran_INTEGER_1) !should map to INTEGER*1 on most modern processors
INTEGER, PARAMETER :: int_kind_4 = SELECTED_INT_KIND(Fortran_INTEGER_2) !should map to INTEGER*2 on most modern processors
INTEGER, PARAMETER :: int_kind_8 = SELECTED_INT_KIND(Fortran_INTEGER_4) !should map to INTEGER*4 on most modern processors
INTEGER, PARAMETER :: int_kind_16 = SELECTED_INT_KIND(Fortran_INTEGER_8) !should map to INTEGER*8 on most modern processors
INTEGER, PARAMETER :: real_kind_7 = SELECTED_REAL_KIND(Fortran_REAL_4) !should map to REAL*4 on most modern processors
INTEGER, PARAMETER :: real_kind_15 = SELECTED_REAL_KIND(Fortran_REAL_8) !should map to REAL*8 on most modern processors
CHARACTER(LEN=8), PARAMETER :: filename = "dsetf.h5" ! File name
CHARACTER(LEN=5), PARAMETER :: dsetname1 = "dset1" ! Dataset name
CHARACTER(LEN=5), PARAMETER :: dsetname2 = "dset2" ! Dataset name
CHARACTER(LEN=5), PARAMETER :: dsetname4 = "dset4" ! Dataset name
CHARACTER(LEN=5), PARAMETER :: dsetname8 = "dset8" ! Dataset name
CHARACTER(LEN=6), PARAMETER :: dsetnamer4 = "dsetr4" ! Dataset name
CHARACTER(LEN=6), PARAMETER :: dsetnamer8 = "dsetr8" ! Dataset name
INTEGER(HID_T) :: file_id ! File identifier
INTEGER(HID_T) :: dset_id1 ! Dataset identifier
INTEGER(HID_T) :: dset_id4 ! Dataset identifier
INTEGER(HID_T) :: dset_id8 ! Dataset identifier
INTEGER(HID_T) :: dset_id16 ! Dataset identifier
INTEGER(HID_T) :: dset_idr4 ! Dataset identifier
INTEGER(HID_T) :: dset_idr8 ! Dataset identifier
INTEGER :: error ! Error flag
INTEGER :: i, j
! Data buffers:
INTEGER, DIMENSION(1:4) :: dset_data
INTEGER(int_kind_1), DIMENSION(1:4), TARGET :: dset_data_i1, data_out_i1
INTEGER(int_kind_4), DIMENSION(1:4), TARGET :: dset_data_i4, data_out_i4
INTEGER(int_kind_8), DIMENSION(1:4), TARGET :: dset_data_i8, data_out_i8
INTEGER(int_kind_16), DIMENSION(1:4), TARGET :: dset_data_i16, data_out_i16
INTEGER(int_kind_8), DIMENSION(1:4), TARGET :: data_out_i8a
REAL(real_kind_7), DIMENSION(1:4), TARGET :: dset_data_r7, data_out_r7
REAL(real_kind_15), DIMENSION(1:4), TARGET :: dset_data_r15, data_out_r15
INTEGER(HSIZE_T), DIMENSION(1:1) :: data_dims = (/4/)
INTEGER(HID_T) :: dspace_id ! Dataspace identifier
TYPE(C_PTR) :: f_ptr
INTEGER(hid_t) :: datatype !/* Common datatype ID */
!
! Initialize FORTRAN interface.
!
CALL h5open_f(error)
!
! Initialize the dset_data array.
!
DO i = 1, 4
dset_data_i1(i) = i
dset_data_i4(i) = i
dset_data_i8(i) = i
dset_data_i16(i) = i
dset_data_r7(i) = (i)*100.
dset_data_r15(i) = (i)*1000.
END DO
CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file_id, error)
!
! Create dataspaces for datasets
!
CALL h5screate_simple_f(1, data_dims , dspace_id, error)
!
! Create the dataset.
!
CALL H5Dcreate_f(file_id, dsetname1, h5kind_to_type(int_kind_1,H5_INTEGER_KIND), dspace_id, dset_id1, error)
CALL H5Dcreate_f(file_id, dsetname2, h5kind_to_type(int_kind_4,H5_INTEGER_KIND), dspace_id, dset_id4, error)
CALL H5Dcreate_f(file_id, dsetname4, h5kind_to_type(int_kind_8,H5_INTEGER_KIND), dspace_id, dset_id8, error)
CALL H5Dcreate_f(file_id, dsetname8, h5kind_to_type(int_kind_16,H5_INTEGER_KIND), dspace_id, dset_id16, error)
CALL H5Dcreate_f(file_id, dsetnamer4, h5kind_to_type(real_kind_7,H5_REAL_KIND), dspace_id, dset_idr4, error)
CALL H5Dcreate_f(file_id, dsetnamer8, h5kind_to_type(real_kind_15,H5_REAL_KIND), dspace_id, dset_idr8, error)
!
! Write the dataset.
!
f_ptr = C_LOC(dset_data_i1(1))
CALL h5dwrite_f(dset_id1, h5kind_to_type(int_kind_1,H5_INTEGER_KIND), f_ptr, error)
f_ptr = C_LOC(dset_data_i4(1))
CALL h5dwrite_f(dset_id4, h5kind_to_type(int_kind_4,H5_INTEGER_KIND), f_ptr, error)
f_ptr = C_LOC(dset_data_i8(1))
CALL h5dwrite_f(dset_id8, h5kind_to_type(int_kind_8,H5_INTEGER_KIND), f_ptr, error)
f_ptr = C_LOC(dset_data_i16(1))
CALL h5dwrite_f(dset_id16, h5kind_to_type(int_kind_16,H5_INTEGER_KIND), f_ptr, error)
f_ptr = C_LOC(dset_data_r7(1))
CALL h5dwrite_f(dset_idr4, h5kind_to_type(real_kind_7,H5_REAL_KIND), f_ptr, error)
f_ptr = C_LOC(dset_data_r15(1))
CALL h5dwrite_f(dset_idr8, h5kind_to_type(real_kind_15,H5_REAL_KIND), f_ptr, error)
!
! Close the file
!
CALL h5fclose_f(file_id, error)
! Open the file
CALL h5fopen_f(filename, H5F_ACC_RDWR_F, file_id, error)
!
! Read the dataset.
!
! Read data back into an integer size that is larger then the original size used for
! writing the data
f_ptr = C_LOC(data_out_i8a(1))
CALL h5dread_f(dset_id1, h5kind_to_type(int_kind_8,H5_INTEGER_KIND), f_ptr, error)
f_ptr = C_LOC(data_out_i4(1))
CALL h5dread_f(dset_id4, h5kind_to_type(int_kind_4,H5_INTEGER_KIND), f_ptr, error)
f_ptr = C_LOC(data_out_i8(1))
CALL h5dread_f(dset_id8, h5kind_to_type(int_kind_8,H5_INTEGER_KIND), f_ptr, error)
f_ptr = C_LOC(data_out_i16(1))
CALL h5dread_f(dset_id16, h5kind_to_type(int_kind_16,H5_INTEGER_KIND), f_ptr, error)
f_ptr = C_LOC(data_out_r7(1))
CALL h5dread_f(dset_idr4, h5kind_to_type(real_kind_7,H5_REAL_KIND), f_ptr, error)
f_ptr = C_LOC(data_out_r15(1))
CALL h5dread_f(dset_idr8, h5kind_to_type(real_kind_15,H5_REAL_KIND), f_ptr, error)
! memory type
WRITE(*,'(A,4i8)' )'SELECTED_INT_KIND(Fortran_INTEGER_1): ',data_out_i8a
WRITE(*,'(A,4i8)' )'SELECTED_INT_KIND(Fortran_INTEGER_4): ',data_out_i4
WRITE(*,'(A,4i8)' )'SELECTED_INT_KIND(Fortran_INTEGER_8): ',data_out_i8
WRITE(*,'(A,4i8)' )'SELECTED_INT_KIND(Fortran_INTEGER_16): ',data_out_i16
WRITE(*,'(A,4(1x,f9.4))' )'SELECTED_REAL_KIND(Fortran_REAL_7): ',data_out_r7
WRITE(*,'(A,4(1x,f16.10))' )'SELECTED_REAL_KIND(Fortran_REAL_15): ',data_out_r15
!
! Close the dataset.
!
CALL h5dclose_f(dset_id1, error)
CALL h5dclose_f(dset_id4, error)
CALL h5dclose_f(dset_id8, error)
CALL h5dclose_f(dset_id16, error)
CALL h5dclose_f(dset_idr4, error)
CALL h5dclose_f(dset_idr8, error)
!
! Close the file.
!
CALL h5fclose_f(file_id, error)
!
! Close FORTRAN interface.
!
CALL h5close_f(error)
END PROGRAM RWDSET_FORTRAN2003