diff options
Diffstat (limited to 'HDF5Examples/FORTRAN/H5D/h5ex_d_unlimmod.F90')
| -rw-r--r-- | HDF5Examples/FORTRAN/H5D/h5ex_d_unlimmod.F90 | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/HDF5Examples/FORTRAN/H5D/h5ex_d_unlimmod.F90 b/HDF5Examples/FORTRAN/H5D/h5ex_d_unlimmod.F90 new file mode 100644 index 0000000..60bf558 --- /dev/null +++ b/HDF5Examples/FORTRAN/H5D/h5ex_d_unlimmod.F90 @@ -0,0 +1,175 @@ +!************************************************************ +! +! 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 |