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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 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. *
! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
!
! This example extends an HDF5 dataset. It is used in the HDF5 Tutorial.
PROGRAM H5_EXTEND
USE HDF5 ! This module contains all necessary modules
IMPLICIT NONE
!
!the dataset is stored in file "extend.h5"
!
CHARACTER(LEN=9), PARAMETER :: filename = "extend.h5"
!
!dataset rank is 2 and name is "ExtendibleArray"
!
CHARACTER(LEN=15), PARAMETER :: dsetname = "ExtendibleArray"
INTEGER :: RANK = 2
INTEGER(HID_T) :: file_id ! File identifier
INTEGER(HID_T) :: dset_id ! Dataset identifier
INTEGER(HID_T) :: dataspace ! Dataspace identifier
INTEGER(HID_T) :: memspace ! Memory dataspace identifier
INTEGER(HID_T) :: crp_list ! Dataset creation property identifier
!
!dataset dimensions at creation time
!
INTEGER(HSIZE_T), DIMENSION(1:2) :: dims = (/3,3/)
!
!data dimensions
!
INTEGER(HSIZE_T), DIMENSION(1:2) :: dimsc = (/2,5/)
INTEGER(HSIZE_T), DIMENSION(1:2) :: dimsm = (/3,7/)
!
!Maximum dimensions
!
INTEGER(HSIZE_T), DIMENSION(1:2) :: maxdims
INTEGER(HSIZE_T), DIMENSION(1:2) :: offset
INTEGER(HSIZE_T), DIMENSION(1:2) :: count
!
! Variables for reading and writing
!
INTEGER, DIMENSION(1:3,1:3) :: data1
INTEGER, DIMENSION(1:21) :: data2 = &
(/2, 3, 4, 2, 3, 4, 2, 3, 4, 2, 3, 4, 2, 3, 4, 2, 3, 4, 2, 3, 4/)
INTEGER(HSIZE_T), DIMENSION(1:2) :: data_dims
!
!Size of data in the file
!
INTEGER(HSIZE_T), DIMENSION(1:2) :: size
!
!general purpose integer
!
INTEGER(HSIZE_T) :: i, j
!
!flag to check operation success
!
INTEGER :: error
!
!Variables used in reading data back
!
INTEGER(HSIZE_T), DIMENSION(1:2) :: dimsr, maxdimsr
INTEGER :: rankr
INTEGER, DIMENSION(1:3,1:10) :: rdata
!
!Initialize FORTRAN predefined datatypes
!
CALL h5open_f(error)
!
!Create a new file using default properties.
!
CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file_id, error)
!
!Create the data space with unlimited dimensions.
!
maxdims = (/H5S_UNLIMITED_F, H5S_UNLIMITED_F/)
CALL h5screate_simple_f(RANK, dims, dataspace, error, maxdims)
!
!Modify dataset creation properties, i.e. enable chunking
!
CALL h5pcreate_f(H5P_DATASET_CREATE_F, crp_list, error)
CALL h5pset_chunk_f(crp_list, RANK, dimsc, error)
!
!Create a dataset with 3X3 dimensions using cparms creation properties.
!
CALL h5dcreate_f(file_id, dsetname, H5T_NATIVE_INTEGER, dataspace, &
dset_id, error, crp_list )
CALL h5sclose_f(dataspace, error)
!
!Fill data array with 1's
!
DO i = 1, dims(1)
DO j = 1, dims(2)
data1(i,j) = 1
END DO
END DO
!
!Write data array to dataset
!
data_dims(1:2) = (/3,3/)
CALL h5dwrite_f(dset_id, H5T_NATIVE_INTEGER, data1, data_dims, error)
!
!Extend the dataset. Dataset becomes 10 x 3.
!
size(1:2) = (/3,10/)
CALL h5dset_extent_f(dset_id, size, error)
offset(1:2) = (/0,3/)
count(1:2) = (/3,7/)
CALL h5screate_simple_f (2, dimsm, memspace, error)
!
!Write to 3x7 extended part of dataset
!
CALL h5dget_space_f(dset_id, dataspace, error)
CALL h5sselect_hyperslab_f(dataspace, H5S_SELECT_SET_F, &
offset, count, error)
data_dims(1:2) = (/3,7/)
CALL H5dwrite_f(dset_id, H5T_NATIVE_INTEGER, data2, data_dims, error, &
memspace, dataspace)
!
!Close the objects that were opened.
!
CALL h5sclose_f(dataspace, error)
CALL h5pclose_f(crp_list, error)
CALL h5dclose_f(dset_id, error)
CALL h5fclose_f(file_id, error)
!
!read the data back
!
!Open the file.
!
CALL h5fopen_f (filename, H5F_ACC_RDONLY_F, file_id, error)
!
!Open the dataset.
!
CALL h5dopen_f(file_id, dsetname, dset_id, error)
!
!Get dataset's dataspace handle.
!
CALL h5dget_space_f(dset_id, dataspace, error)
!
!Get dataspace's rank.
!
CALL h5sget_simple_extent_ndims_f(dataspace, rankr, error)
!
!Get dataspace's dimensions.
!
CALL h5sget_simple_extent_dims_f(dataspace, dimsr, maxdimsr, error)
!
!Get creation property list.
!
CALL h5dget_create_plist_f(dset_id, crp_list, error)
!
! Fill read buffer with zeroes
!
rdata(1:dimsr(1),1:dimsr(2)) = 0
!
!create memory dataspace
!
CALL h5screate_simple_f(rankr, dimsr, memspace, error)
!
!Read data
!
data_dims(1:2) = (/3,10/)
CALL H5dread_f(dset_id, H5T_NATIVE_INTEGER, rdata, data_dims, &
error, memspace, dataspace)
WRITE(*,'(A)') "Dataset:"
DO i = 1, dimsr(1)
WRITE(*,'(100(I0,1X))') rdata(i,1:dimsr(2))
END DO
!
!Close the objects that were opened.
!
CALL h5sclose_f(dataspace, error)
CALL h5sclose_f(memspace, error)
CALL h5pclose_f(crp_list, error)
CALL h5dclose_f(dset_id, error)
CALL h5fclose_f(file_id, error)
!Close FORTRAN predefined datatypes
!
CALL h5close_f(error)
END PROGRAM H5_EXTEND
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