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Diffstat (limited to 'fortran/examples/rwdset_fortran2003.f90')
| -rw-r--r-- | fortran/examples/rwdset_fortran2003.f90 | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/fortran/examples/rwdset_fortran2003.f90 b/fortran/examples/rwdset_fortran2003.f90 new file mode 100644 index 0000000..36ebf0d --- /dev/null +++ b/fortran/examples/rwdset_fortran2003.f90 @@ -0,0 +1,176 @@ +! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * +! 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 COPYING file, which can be found at the root of the source code * +! distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. * +! 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 + + + |