!************************************************************ ! ! This example shows how to set the fill value for a ! dataset. The program first sets the fill value to ! FILLVAL, creates a dataset with dimensions of DIM0xDIM1, ! reads from the uninitialized dataset, and outputs the ! contents to the screen. Next, it writes integers to the ! dataset, reads the data back, and outputs it to the ! screen. Finally it extends the dataset, reads from it, ! and outputs the result to the screen. ! ! This file is intended for use with HDF5 Library verion 1.8 ! ! ************************************************************/ PROGRAM main USE HDF5 IMPLICIT NONE CHARACTER(LEN=17), PARAMETER :: filename = "h5ex_d_fillval.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 , PARAMETER :: fillval = 99 INTEGER :: hdferr INTEGER(HID_T) :: file, space, dset, dcpl ! Handles INTEGER(HSIZE_T), DIMENSION(1:2) :: dims = (/dim0, dim1/) INTEGER(HSIZE_T), DIMENSION(1:2) :: extdims = (/edim0, edim1/) INTEGER(HSIZE_T), DIMENSION(1:2) :: maxdims INTEGER(HSIZE_T), DIMENSION(1:2) :: chunk = (/chunk0, chunk1/) INTEGER, DIMENSION(1:dim0, 1:dim1) :: wdata, & ! Write buffer rdata ! Read buffer INTEGER, DIMENSION(1:edim0, 1:edim1) :: rdata2 ! Read buffer for extension INTEGER :: i, j INTEGER :: fillvall ! ! Initialize FORTRAN interface. ! CALL h5open_f(hdferr) ! ! Initialize data. ! maxdims = (/H5S_UNLIMITED_F, H5S_UNLIMITED_F/) DO i = 1, dim0 DO j = 1, dim1 wdata(i,j) = (i-1)*(j-1)-(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. ! 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) ! ! Set the fill value for the dataset. ! CALL h5pset_fill_value_f(dcpl, H5T_NATIVE_INTEGER, fillval, hdferr) ! ! Set the allocation time to "early". This way we can be sure ! that reading from the dataset immediately after creation will ! return the fill value. ! CALL h5pset_alloc_time_f(dcpl, H5D_ALLOC_TIME_EARLY_F,hdferr) ! ! Create the dataset using the dataset creation property list. ! CALL h5dcreate_f(file, dataset, H5T_STD_I32LE, space, dset, hdferr, dcpl) ! ! Read values from the dataset, which has not been written to yet. ! CALL h5dread_f(dset, H5T_NATIVE_INTEGER, rdata, dims, hdferr) ! ! Output the data to the screen. ! WRITE(*, '("Dataset before being written to:")') DO i=1, dim0 WRITE(*,'(" [")', ADVANCE='NO') WRITE(*,'(80i3)', ADVANCE='NO') rdata(i,:) WRITE(*,'(" ]")') ENDDO ! ! Write the data to the dataset. ! CALL h5dwrite_f(dset, H5T_NATIVE_INTEGER, wdata, dims, hdferr, file_space_id=space) ! ! Read the data back. ! CALL h5dread_f(dset, H5T_NATIVE_INTEGER, rdata, dims, hdferr) ! ! Output the data to the screen. ! WRITE(*, '("Dataset after being written to:")') 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) ! ! Read from the extended dataset. ! CALL h5dread_f(dset, H5T_NATIVE_INTEGER, rdata2, extdims, hdferr) ! ! Output the data to the screen. ! WRITE(*, '("Dataset after extension:")') DO i=1, extdims(1) WRITE(*,'(" [")', ADVANCE='NO') WRITE(*,'(80i3)', ADVANCE='NO') rdata2(i,:) WRITE(*,'(" ]")') ENDDO ! ! Close and release resources. ! CALL h5pclose_f(dcpl , hdferr) CALL h5dclose_f(dset , hdferr) CALL h5sclose_f(space, hdferr) CALL h5fclose_f(file , hdferr) END PROGRAM main