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Diffstat (limited to 'HDF5Examples/FORTRAN/H5D/h5ex_d_fillval.F90')
| -rw-r--r-- | HDF5Examples/FORTRAN/H5D/h5ex_d_fillval.F90 | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/HDF5Examples/FORTRAN/H5D/h5ex_d_fillval.F90 b/HDF5Examples/FORTRAN/H5D/h5ex_d_fillval.F90 new file mode 100644 index 0000000..8b41e0b --- /dev/null +++ b/HDF5Examples/FORTRAN/H5D/h5ex_d_fillval.F90 @@ -0,0 +1,140 @@ +!************************************************************ +! +! 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 version 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 |