PROGRAM CHUNK USE HDF5 ! This module contains all necessary modules IMPLICIT NONE ! !the dataset is stored in file "chunkf.h5" ! CHARACTER(LEN=9), PARAMETER :: filename = "chunkf.h5" !CHARACTER(LEN=80) :: fix_filename ! !dataset name is "ExtendibleArray" ! CHARACTER(LEN=15), PARAMETER :: dsetname = "ExtendibleArray" ! !dataset rank is 2 ! 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 creatation property identifier ! !dataset dimensions at creation time ! INTEGER(HSIZE_T), DIMENSION(2) :: dims = (/3,3/) ! !data dimensions ! INTEGER(HSIZE_T), DIMENSION(2) :: dims1 = (/10,3/) ! !Maximum dimensions ! INTEGER(HSIZE_T), DIMENSION(2) :: maxdims ! !data arrays for reading and writing ! INTEGER, DIMENSION(10,3) :: data_in, data_out ! !Size of data in the file ! INTEGER(HSIZE_T), DIMENSION(2) :: size ! !general purpose integer ! INTEGER :: i, j ! !flag to check operation success ! INTEGER :: error ! !Variables used in reading data back ! INTEGER(HSIZE_T), DIMENSION(2) :: dimsr, maxdimsr INTEGER :: rankr INTEGER(HSIZE_T), DIMENSION(2) :: data_dims ! !data initialization ! do i = 1, 10 do j = 1, 3 data_in(i,j) = 2 end do end do ! !Initialize FORTRAN predifined datatypes ! CALL h5open_f(error) ! !Create a new file using default properties. ! !CALL h5_fixname_f(filename, fix_filename, H5P_DEFAULT_F, error) !if (error .ne. 0) then ! write(*,*) "Cannot modify filename" ! stop !endif 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, dims1, error) ! !Create a dataset with 3X3 dimensions using cparms creation propertie . ! CALL h5dcreate_f(file_id, dsetname, H5T_NATIVE_INTEGER, dataspace, & dset_id, error, crp_list ) ! !Extend the dataset. This call assures that dataset is 3 x 3. ! size(1) = 3 size(2) = 3 CALL h5dextend_f(dset_id, size, error) ! !Extend the dataset. Dataset becomes 10 x 3. ! size(1) = 10; size(2) = 3; CALL h5dextend_f(dset_id, size, error) ! !Write the data of size 10X3 to the extended dataset. ! data_dims(1) = 10 data_dims(2) = 3 CALL H5dwrite_f(dset_id, H5T_NATIVE_INTEGER, data_in, data_dims, error) ! !Close the dataspace for the dataset. ! CALL h5sclose_f(dataspace, error) ! !Close the property list. ! CALL h5pclose_f(crp_list, error) ! !Close the dataset. ! CALL h5dclose_f(dset_id, error) ! !Close the file. ! 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) IF (rankr .NE. RANK) then write(*,*) "dataset rank error occured" stop END IF ! !Get dataspace's dimensinons. ! CALL h5sget_simple_extent_dims_f(dataspace, dimsr, maxdimsr, error) IF ((dimsr(1) .NE. dims1(1)) .OR. (dimsr(2) .NE. dims1(2))) THEN write(*,*) "dataset dimensions error occured" stop END IF ! !Get creation property list. ! CALL h5dget_create_plist_f(dset_id, crp_list, error) ! !create memory dataspace. ! CALL h5screate_simple_f(rankr, dimsr, memspace, error) ! !Read data ! CALL H5dread_f(dset_id, H5T_NATIVE_INTEGER, data_out, data_dims, error, & memspace, dataspace) ! !Compare the data. ! do i = 1, dims1(1) do j = 1, dims1(2) IF (data_out(i,j) .NE. data_in(i, j)) THEN write(*, *) "extend dataset test error occured" write(*, *) "read value is not the same as the written values" END IF end do end do ! !Close the dataspace for the dataset. ! CALL h5sclose_f(dataspace, error) ! !Close the memspace for the dataset. ! CALL h5sclose_f(memspace, error) ! !Close the property list. ! CALL h5pclose_f(crp_list, error) ! !Close the dataset. ! CALL h5dclose_f(dset_id, error) ! !Close the file. ! CALL h5fclose_f(file_id, error) !Close FORTRAN predefined datatypes ! CALL h5close_f(error) END PROGRAM CHUNK