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Diffstat (limited to 'HDF5Examples/FORTRAN/H5D/h5ex_d_transform.F90')
| -rw-r--r-- | HDF5Examples/FORTRAN/H5D/h5ex_d_transform.F90 | 133 |
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diff --git a/HDF5Examples/FORTRAN/H5D/h5ex_d_transform.F90 b/HDF5Examples/FORTRAN/H5D/h5ex_d_transform.F90 new file mode 100644 index 0000000..58767fd --- /dev/null +++ b/HDF5Examples/FORTRAN/H5D/h5ex_d_transform.F90 @@ -0,0 +1,133 @@ +!************************************************************ +! +! This example shows how to read and write data to a dataset +! using a data transform expression. The program first +! writes integers to a dataset using the transform +! expression TRANSFORM, then closes the file. Next, it +! reopens the file, reads back the data without a transform, +! and outputs the data to the screen. Finally it reads the +! data using the transform expression RTRANSFORM and outputs +! the results to the screen. +! +! This file is intended for use with HDF5 Library version 1.8 +! +!************************************************************ +PROGRAM main + + USE HDF5 + + IMPLICIT NONE + + CHARACTER(LEN=19), PARAMETER :: filename = "h5ex_d_transform.h5" + CHARACTER(LEN=3) , PARAMETER :: dataset = "DS1" + INTEGER , PARAMETER :: dim0 = 4 + INTEGER , PARAMETER :: dim1 = 7 + CHARACTER(LEN=3) , PARAMETER :: transform = "x+1" + CHARACTER(LEN=3) , PARAMETER :: rtransform = "x-1" + + INTEGER(HID_T) :: file, space, dset, dxpl ! Handles + INTEGER :: hdferr + INTEGER(HSIZE_T), DIMENSION(1:2) :: dims = (/dim0, dim1/) + INTEGER, DIMENSION(1:dim0, 1:dim1) :: wdata, & ! Write buffer + rdata ! Read buffer + INTEGER :: i, j + ! + ! 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 + ! + ! Output the data to the screen. + ! + WRITE(*, '("Original Data:")') + DO i=1, dim0 + WRITE(*,'(" [")', ADVANCE='NO') + WRITE(*,'(80i3)', ADVANCE='NO') wdata(i,:) + WRITE(*,'(" ]")') + ENDDO + ! + ! Create a new file using the default properties. + ! + CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file, hdferr) + ! + ! Create dataspace. Setting maximum size to NULL sets the maximum + ! size to be the current size. + ! + CALL h5screate_simple_f(2, dims, space, hdferr) + ! + ! Create the dataset transfer property list and define the + ! transform expression. + ! + CALL h5pcreate_f(H5P_DATASET_XFER_F, dxpl, hdferr) + CALL h5pset_data_transform_f (dxpl, transform, hdferr) + ! + ! Create the dataset using the default properties. Unfortunately + ! we must save as a native type or the transform operation will + ! fail. + ! + CALL h5dcreate_f(file, dataset, H5T_NATIVE_INTEGER, space, dset, hdferr) + ! + ! Write the data to the dataset using the dataset transfer + ! property list. + ! + CALL h5dwrite_f(dset, H5T_NATIVE_INTEGER, wdata, dims, hdferr,xfer_prp=dxpl) + ! + ! Close and release resources. + ! + CALL h5pclose_f(dxpl , hdferr) + CALL h5dclose_f(dset , hdferr) + CALL h5sclose_f(space, hdferr) + CALL h5fclose_f(file , hdferr) + ! + ! Now we begin the read section of this example. + ! + CALL h5fopen_f(filename, H5F_ACC_RDONLY_F, file, hdferr) + CALL h5dopen_f (file, dataset, dset, hdferr) + ! + ! Read the data using the default properties. + ! + CALL h5dread_f(dset, H5T_NATIVE_INTEGER, rdata, dims, hdferr) + ! + ! Output the data to the screen. + ! + WRITE(*, '(/,"Data as written with transform ",A,":")') transform + DO i=1, dim0 + WRITE(*,'(" [")', ADVANCE='NO') + WRITE(*,'(80i3)', ADVANCE='NO') rdata(i,:) + WRITE(*,'(" ]")') + ENDDO + ! + ! Create the dataset transfer property list and define the + ! transform expression. + ! + CALL h5pcreate_f(H5P_DATASET_XFER_F, dxpl, hdferr) + CALL h5pset_data_transform_f (dxpl, rtransform, hdferr) + ! + ! Read the data using the dataset transfer property list. + ! + CALL h5dread_f(dset, H5T_NATIVE_INTEGER, rdata, dims, hdferr,xfer_prp=dxpl) + ! + ! Output the data to the screen. + ! + WRITE(*, '(/,"Data as written with transform ",A," and read with transform ",A,":")') & + transform, rtransform + DO i=1, dim0 + WRITE(*,'(" [")', ADVANCE='NO') + WRITE(*,'(80i3)', ADVANCE='NO') rdata(i,:) + WRITE(*,'(" ]")') + ENDDO + ! + ! Close and release resources. + ! + CALL h5pclose_f(dxpl , hdferr) + CALL h5dclose_f(dset , hdferr) + CALL h5fclose_f(file , hdferr) + +END PROGRAM main |