!************************************************************ ! ! This example shows how to create and extend an unlimited ! dataset. The program first writes integers to a dataset ! with dataspace dimensions of DIM0xDIM1, then closes the ! file. Next, it reopens the file, reads back the data, ! outputs it to the screen, extends the dataset, and writes ! new data to the entire extended dataset. Finally it ! reopens the file again, reads back the data, and outputs it ! to the screen. ! ! This file is intended for use with HDF5 Library version 1.8 ! !************************************************************ PROGRAM main USE HDF5 IMPLICIT NONE CHARACTER(LEN=18), PARAMETER :: filename = "h5ex_d_unlimmod.h5" CHARACTER(LEN=3) , PARAMETER :: dataset = "DS1" INTEGER , PARAMETER :: dim0 = 4 INTEGER , PARAMETER :: dim1 = 7 INTEGER , PARAMETER :: edim0 = 6 INTEGER , PARAMETER :: edim1 = 10 INTEGER , PARAMETER :: chunk0 = 4 INTEGER , PARAMETER :: chunk1 = 4 INTEGER(HID_T) :: file, space, dset, dcpl ! Handles INTEGER :: hdferr INTEGER(HSIZE_T), DIMENSION(1:2) :: dims = (/dim0, dim1/) INTEGER(HSIZE_T), DIMENSION(1:2) :: chunk =(/chunk0, chunk1/) INTEGER(HSIZE_T), DIMENSION(1:2) :: extdims =(/edim0, edim1/) INTEGER(HSIZE_T), DIMENSION(1:2) :: maxdims INTEGER, DIMENSION(1:dim0, 1:dim1), TARGET :: wdata ! Write buffer INTEGER, DIMENSION(1:edim0, 1:edim1), TARGET :: wdata2 ! Write buffer for extension INTEGER :: i, j INTEGER(HSIZE_T), DIMENSION(1:2) :: ndims INTEGER, ALLOCATABLE, DIMENSION(:,:), TARGET :: rdata ! Read buffer ! ! Initialize FORTRAN interface. ! CALL h5open_f(hdferr) ! ! Initialize data. ! DO i = 1, dim0 DO j = 1, dim1 wdata(i,j) = (i-2)*(j-1) ENDDO ENDDO ! ! Create a new file using the default properties. ! CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file, hdferr) ! ! Create dataspace with unlimited dimensions. ! maxdims = (/H5S_UNLIMITED_F, H5S_UNLIMITED_F/) CALL h5screate_simple_f(2, dims, space, hdferr, maxdims) ! ! Create the dataset creation property list, and set the chunk ! size. ! CALL h5pcreate_f(H5P_DATASET_CREATE_F, dcpl, hdferr) CALL h5pset_chunk_f(dcpl, 2, chunk, hdferr) ! ! Create the unlimited dataset. ! CALL h5dcreate_f(file, dataset, H5T_STD_I32LE, space, dset, hdferr, dcpl) ! ! Write the data to the dataset. ! CALL h5dwrite_f(dset, H5T_NATIVE_INTEGER, wdata, dims, hdferr) ! ! Close and release resources. ! CALL h5pclose_f(dcpl , hdferr) CALL h5dclose_f(dset , hdferr) CALL h5sclose_f(space, hdferr) CALL h5fclose_f(file , hdferr) ! ! In this next section we read back the data, extend the dataset, ! and write new data to the entire dataset. ! ! ! Open file and dataset using the default properties. ! CALL h5fopen_f(filename, H5F_ACC_RDWR_F, file, hdferr) CALL h5dopen_f (file, dataset, dset, hdferr) ! ! Get dataspace and allocate memory for read buffer. This is a ! two dimensional dataset so the dynamic allocation must be done ! in steps. ! CALL h5dget_space_f(dset, space, hdferr) CALL h5sget_simple_extent_dims_f(space, dims, ndims, hdferr) ! ! Allocate buffer for reading ! ALLOCATE(rdata(1:dims(1),1:dims(2))) ! ! Read the data using the default properties. ! CALL h5dread_f(dset, H5T_NATIVE_INTEGER, rdata, dims, hdferr) ! ! Output the data to the screen. ! WRITE(*, '(/,"Dataset before extension:")') DO i=1, dim0 WRITE(*,'(" [")', ADVANCE='NO') WRITE(*,'(80i3)', ADVANCE='NO') rdata(i,:) WRITE(*,'(" ]")') ENDDO ! ! Extend the dataset. ! CALL h5dset_extent_f(dset, extdims, hdferr) ! ! Initialize data for writing to the extended dataset. ! DO i = 1, edim0 DO j = 1, edim1 wdata2(i,j) = j-1 ENDDO ENDDO ! ! Write the data to the extended dataset. ! CALL h5dwrite_f(dset, H5T_NATIVE_INTEGER, wdata2, extdims, hdferr) ! ! Close and release resources. ! DEALLOCATE(rdata) CALL h5dclose_f(dset , hdferr) CALL h5sclose_f(space, hdferr) CALL h5fclose_f(file , hdferr) ! ! Now we simply read back the data and output it to the screen. ! ! ! Open file and dataset using the default properties. ! CALL h5fopen_f(filename, H5F_ACC_RDONLY_F, file, hdferr) CALL h5dopen_f (file, dataset, dset, hdferr) ! ! Get dataspace and allocate memory for the read buffer as before. ! CALL h5dget_space_f(dset, space, hdferr) CALL h5sget_simple_extent_dims_f(space, dims, ndims, hdferr) ALLOCATE( rdata(1:extdims(1),1:extdims(2)) ) ! ! Read the data using the default properties. ! CALL h5dread_f(dset, H5T_NATIVE_INTEGER, rdata, dims, hdferr) ! ! Output the data to the screen. ! WRITE(*, '(/,"Dataset after extension:")') DO i=1, dims(1) WRITE(*,'(" [")', ADVANCE='NO') WRITE(*,'(80i3)', ADVANCE='NO') rdata(i,:) WRITE(*,'(" ]")') ENDDO ! ! Close and release resources. ! DEALLOCATE(rdata) CALL h5dclose_f(dset , hdferr) CALL h5sclose_f(space, hdferr) CALL h5fclose_f(file , hdferr) END PROGRAM main