! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ! Copyright by The HDF Group. * ! 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 COPYING file, which can be found at the root of the source code * ! distribution tree, or in https://www.hdfgroup.org/licenses. * ! 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(2) !should map to INTEGER*1 on most modern processors INTEGER, PARAMETER :: int_kind_4 = SELECTED_INT_KIND(4) !should map to INTEGER*2 on most modern processors INTEGER, PARAMETER :: int_kind_8 = SELECTED_INT_KIND(9) !should map to INTEGER*4 on most modern processors INTEGER, PARAMETER :: int_kind_16 = SELECTED_INT_KIND(18) !should map to INTEGER*8 on most modern processors INTEGER, PARAMETER :: real_kind_7 = SELECTED_REAL_KIND(6,37) !should map to REAL*4 on most modern processors INTEGER, PARAMETER :: real_kind_15 = SELECTED_REAL_KIND(15,307) !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 ! Data buffers: INTEGER(int_kind_1), DIMENSION(1:4), TARGET :: dset_data_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 ! ! 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(2): ',data_out_i8a WRITE(*,'(A,4i8)' )'SELECTED_INT_KIND(4): ',data_out_i4 WRITE(*,'(A,4i8)' )'SELECTED_INT_KIND(9): ',data_out_i8 WRITE(*,'(A,4i8)' )'SELECTED_INT_KIND(18): ',data_out_i16 WRITE(*,'(A,4(1x,f9.4))' )'SELECTED_REAL_KIND(6,37): ',data_out_r7 WRITE(*,'(A,4(1x,f16.10))' )'SELECTED_REAL_KIND(15,307): ',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