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177 lines
7.3 KiB
Fortran
177 lines
7.3 KiB
Fortran
! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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! Copyright by The HDF Group. *
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! Copyright by the Board of Trustees of the University of Illinois. *
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! All rights reserved. *
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! *
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! This file is part of HDF5. The full HDF5 copyright notice, including *
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! terms governing use, modification, and redistribution, is contained in *
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! the COPYING file, which can be found at the root of the source code *
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! distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. *
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! If you do not have access to either file, you may request a copy from *
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! help@hdfgroup.org. *
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! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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!
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!
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! The following example shows how to write and read to/from an existing dataset.
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! It opens the file created in the previous example, obtains the dataset
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! identifier, writes the data to the dataset in the file,
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! then reads the dataset to memory. Uses updated Fortran 2003 interface
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! with different KINDs of integers and reals.
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!
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PROGRAM RWDSET_FORTRAN2003
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USE ISO_C_BINDING
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USE HDF5 ! This module contains all necessary modules
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IMPLICIT NONE
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INTEGER, PARAMETER :: int_kind_1 = SELECTED_INT_KIND(2) !should map to INTEGER*1 on most modern processors
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INTEGER, PARAMETER :: int_kind_4 = SELECTED_INT_KIND(4) !should map to INTEGER*2 on most modern processors
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INTEGER, PARAMETER :: int_kind_8 = SELECTED_INT_KIND(9) !should map to INTEGER*4 on most modern processors
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INTEGER, PARAMETER :: int_kind_16 = SELECTED_INT_KIND(18) !should map to INTEGER*8 on most modern processors
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INTEGER, PARAMETER :: real_kind_7 = SELECTED_REAL_KIND(6,37) !should map to REAL*4 on most modern processors
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INTEGER, PARAMETER :: real_kind_15 = SELECTED_REAL_KIND(15,307) !should map to REAL*8 on most modern processors
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CHARACTER(LEN=8), PARAMETER :: filename = "dsetf.h5" ! File name
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CHARACTER(LEN=5), PARAMETER :: dsetname1 = "dset1" ! Dataset name
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CHARACTER(LEN=5), PARAMETER :: dsetname2 = "dset2" ! Dataset name
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CHARACTER(LEN=5), PARAMETER :: dsetname4 = "dset4" ! Dataset name
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CHARACTER(LEN=5), PARAMETER :: dsetname8 = "dset8" ! Dataset name
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CHARACTER(LEN=6), PARAMETER :: dsetnamer4 = "dsetr4" ! Dataset name
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CHARACTER(LEN=6), PARAMETER :: dsetnamer8 = "dsetr8" ! Dataset name
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INTEGER(HID_T) :: file_id ! File identifier
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INTEGER(HID_T) :: dset_id1 ! Dataset identifier
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INTEGER(HID_T) :: dset_id4 ! Dataset identifier
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INTEGER(HID_T) :: dset_id8 ! Dataset identifier
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INTEGER(HID_T) :: dset_id16 ! Dataset identifier
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INTEGER(HID_T) :: dset_idr4 ! Dataset identifier
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INTEGER(HID_T) :: dset_idr8 ! Dataset identifier
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INTEGER :: error ! Error flag
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INTEGER :: i
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! Data buffers:
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INTEGER(int_kind_1), DIMENSION(1:4), TARGET :: dset_data_i1
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INTEGER(int_kind_4), DIMENSION(1:4), TARGET :: dset_data_i4, data_out_i4
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INTEGER(int_kind_8), DIMENSION(1:4), TARGET :: dset_data_i8, data_out_i8
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INTEGER(int_kind_16), DIMENSION(1:4), TARGET :: dset_data_i16, data_out_i16
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INTEGER(int_kind_8), DIMENSION(1:4), TARGET :: data_out_i8a
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REAL(real_kind_7), DIMENSION(1:4), TARGET :: dset_data_r7, data_out_r7
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REAL(real_kind_15), DIMENSION(1:4), TARGET :: dset_data_r15, data_out_r15
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INTEGER(HSIZE_T), DIMENSION(1:1) :: data_dims = (/4/)
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INTEGER(HID_T) :: dspace_id ! Dataspace identifier
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TYPE(C_PTR) :: f_ptr
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!
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! Initialize FORTRAN interface.
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!
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CALL h5open_f(error)
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!
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! Initialize the dset_data array.
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!
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DO i = 1, 4
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dset_data_i1(i) = i
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dset_data_i4(i) = i
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dset_data_i8(i) = i
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dset_data_i16(i) = i
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dset_data_r7(i) = (i)*100.
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dset_data_r15(i) = (i)*1000.
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END DO
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CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file_id, error)
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!
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! Create dataspaces for datasets
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!
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CALL h5screate_simple_f(1, data_dims , dspace_id, error)
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!
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! Create the dataset.
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!
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CALL H5Dcreate_f(file_id, dsetname1, h5kind_to_type(int_kind_1,H5_INTEGER_KIND), dspace_id, dset_id1, error)
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CALL H5Dcreate_f(file_id, dsetname2, h5kind_to_type(int_kind_4,H5_INTEGER_KIND), dspace_id, dset_id4, error)
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CALL H5Dcreate_f(file_id, dsetname4, h5kind_to_type(int_kind_8,H5_INTEGER_KIND), dspace_id, dset_id8, error)
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CALL H5Dcreate_f(file_id, dsetname8, h5kind_to_type(int_kind_16,H5_INTEGER_KIND), dspace_id, dset_id16, error)
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CALL H5Dcreate_f(file_id, dsetnamer4, h5kind_to_type(real_kind_7,H5_REAL_KIND), dspace_id, dset_idr4, error)
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CALL H5Dcreate_f(file_id, dsetnamer8, h5kind_to_type(real_kind_15,H5_REAL_KIND), dspace_id, dset_idr8, error)
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!
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! Write the dataset.
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!
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f_ptr = C_LOC(dset_data_i1(1))
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CALL h5dwrite_f(dset_id1, h5kind_to_type(int_kind_1,H5_INTEGER_KIND), f_ptr, error)
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f_ptr = C_LOC(dset_data_i4(1))
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CALL h5dwrite_f(dset_id4, h5kind_to_type(int_kind_4,H5_INTEGER_KIND), f_ptr, error)
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f_ptr = C_LOC(dset_data_i8(1))
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CALL h5dwrite_f(dset_id8, h5kind_to_type(int_kind_8,H5_INTEGER_KIND), f_ptr, error)
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f_ptr = C_LOC(dset_data_i16(1))
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CALL h5dwrite_f(dset_id16, h5kind_to_type(int_kind_16,H5_INTEGER_KIND), f_ptr, error)
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f_ptr = C_LOC(dset_data_r7(1))
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CALL h5dwrite_f(dset_idr4, h5kind_to_type(real_kind_7,H5_REAL_KIND), f_ptr, error)
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f_ptr = C_LOC(dset_data_r15(1))
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CALL h5dwrite_f(dset_idr8, h5kind_to_type(real_kind_15,H5_REAL_KIND), f_ptr, error)
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!
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! Close the file
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!
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CALL h5fclose_f(file_id, error)
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! Open the file
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CALL h5fopen_f(filename, H5F_ACC_RDWR_F, file_id, error)
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!
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! Read the dataset.
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!
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! Read data back into an integer size that is larger then the original size used for
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! writing the data
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f_ptr = C_LOC(data_out_i8a(1))
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CALL h5dread_f(dset_id1, h5kind_to_type(int_kind_8,H5_INTEGER_KIND), f_ptr, error)
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f_ptr = C_LOC(data_out_i4(1))
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CALL h5dread_f(dset_id4, h5kind_to_type(int_kind_4,H5_INTEGER_KIND), f_ptr, error)
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f_ptr = C_LOC(data_out_i8(1))
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CALL h5dread_f(dset_id8, h5kind_to_type(int_kind_8,H5_INTEGER_KIND), f_ptr, error)
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f_ptr = C_LOC(data_out_i16(1))
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CALL h5dread_f(dset_id16, h5kind_to_type(int_kind_16,H5_INTEGER_KIND), f_ptr, error)
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f_ptr = C_LOC(data_out_r7(1))
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CALL h5dread_f(dset_idr4, h5kind_to_type(real_kind_7,H5_REAL_KIND), f_ptr, error)
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f_ptr = C_LOC(data_out_r15(1))
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CALL h5dread_f(dset_idr8, h5kind_to_type(real_kind_15,H5_REAL_KIND), f_ptr, error)
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! memory type
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WRITE(*,'(A,4i8)' )'SELECTED_INT_KIND(2): ',data_out_i8a
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WRITE(*,'(A,4i8)' )'SELECTED_INT_KIND(4): ',data_out_i4
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WRITE(*,'(A,4i8)' )'SELECTED_INT_KIND(9): ',data_out_i8
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WRITE(*,'(A,4i8)' )'SELECTED_INT_KIND(18): ',data_out_i16
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WRITE(*,'(A,4(1x,f9.4))' )'SELECTED_REAL_KIND(6,37): ',data_out_r7
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WRITE(*,'(A,4(1x,f16.10))' )'SELECTED_REAL_KIND(15,307): ',data_out_r15
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!
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! Close the dataset.
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!
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CALL h5dclose_f(dset_id1, error)
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CALL h5dclose_f(dset_id4, error)
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CALL h5dclose_f(dset_id8, error)
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CALL h5dclose_f(dset_id16, error)
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CALL h5dclose_f(dset_idr4, error)
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CALL h5dclose_f(dset_idr8, error)
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!
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! Close the file.
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!
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CALL h5fclose_f(file_id, error)
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!
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! Close FORTRAN interface.
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!
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CALL h5close_f(error)
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END PROGRAM RWDSET_FORTRAN2003
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