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* Merge examples repo into library * Change grepTest to be more fault-tolerant * Update examples macro file * Exclude all Fortran examples from doxygen
141 lines
4.2 KiB
Fortran
141 lines
4.2 KiB
Fortran
!************************************************************
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!
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! This example shows how to set the fill value for a
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! dataset. The program first sets the fill value to
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! FILLVAL, creates a dataset with dimensions of DIM0xDIM1,
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! reads from the uninitialized dataset, and outputs the
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! contents to the screen. Next, it writes integers to the
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! dataset, reads the data back, and outputs it to the
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! screen. Finally it extends the dataset, reads from it,
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! and outputs the result to the screen.
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!
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! This file is intended for use with HDF5 Library version 1.8
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!
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! ************************************************************/
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PROGRAM main
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USE HDF5
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IMPLICIT NONE
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CHARACTER(LEN=17), PARAMETER :: filename = "h5ex_d_fillval.h5"
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CHARACTER(LEN=3) , PARAMETER :: dataset = "DS1"
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INTEGER , PARAMETER :: dim0 = 4
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INTEGER , PARAMETER :: dim1 = 7
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INTEGER , PARAMETER :: edim0 = 6
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INTEGER , PARAMETER :: edim1 = 10
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INTEGER , PARAMETER :: chunk0 = 4
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INTEGER , PARAMETER :: chunk1 = 4
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INTEGER , PARAMETER :: fillval = 99
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INTEGER :: hdferr
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INTEGER(HID_T) :: file, space, dset, dcpl ! Handles
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INTEGER(HSIZE_T), DIMENSION(1:2) :: dims = (/dim0, dim1/)
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INTEGER(HSIZE_T), DIMENSION(1:2) :: extdims = (/edim0, edim1/)
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INTEGER(HSIZE_T), DIMENSION(1:2) :: maxdims
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INTEGER(HSIZE_T), DIMENSION(1:2) :: chunk = (/chunk0, chunk1/)
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INTEGER, DIMENSION(1:dim0, 1:dim1) :: wdata, & ! Write buffer
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rdata ! Read buffer
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INTEGER, DIMENSION(1:edim0, 1:edim1) :: rdata2 ! Read buffer for extension
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INTEGER :: i, j
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INTEGER :: fillvall
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!
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! Initialize FORTRAN interface.
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!
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CALL h5open_f(hdferr)
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!
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! Initialize data.
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!
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maxdims = (/H5S_UNLIMITED_F, H5S_UNLIMITED_F/)
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DO i = 1, dim0
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DO j = 1, dim1
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wdata(i,j) = (i-1)*(j-1)-(j-1)
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ENDDO
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ENDDO
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!
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! Create a new file using the default properties.
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!
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CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file, hdferr)
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!
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! Create dataspace with unlimited dimensions.
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!
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CALL h5screate_simple_f(2, dims, space, hdferr, maxdims)
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!
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! Create the dataset creation property list, and set the chunk
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! size.
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!
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CALL h5pcreate_f(H5P_DATASET_CREATE_F, dcpl, hdferr)
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CALL h5pset_chunk_f(dcpl, 2, chunk, hdferr)
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!
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! Set the fill value for the dataset.
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!
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CALL h5pset_fill_value_f(dcpl, H5T_NATIVE_INTEGER, fillval, hdferr)
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!
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! Set the allocation time to "early". This way we can be sure
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! that reading from the dataset immediately after creation will
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! return the fill value.
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!
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CALL h5pset_alloc_time_f(dcpl, H5D_ALLOC_TIME_EARLY_F,hdferr)
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!
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! Create the dataset using the dataset creation property list.
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!
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CALL h5dcreate_f(file, dataset, H5T_STD_I32LE, space, dset, hdferr, dcpl)
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!
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! Read values from the dataset, which has not been written to yet.
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!
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CALL h5dread_f(dset, H5T_NATIVE_INTEGER, rdata, dims, hdferr)
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!
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! Output the data to the screen.
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!
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WRITE(*, '("Dataset before being written to:")')
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DO i=1, dim0
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WRITE(*,'(" [")', ADVANCE='NO')
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WRITE(*,'(80i3)', ADVANCE='NO') rdata(i,:)
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WRITE(*,'(" ]")')
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ENDDO
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!
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! Write the data to the dataset.
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!
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CALL h5dwrite_f(dset, H5T_NATIVE_INTEGER, wdata, dims, hdferr, file_space_id=space)
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!
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! Read the data back.
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!
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CALL h5dread_f(dset, H5T_NATIVE_INTEGER, rdata, dims, hdferr)
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!
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! Output the data to the screen.
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!
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WRITE(*, '("Dataset after being written to:")')
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DO i=1, dim0
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WRITE(*,'(" [")', ADVANCE='NO')
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WRITE(*,'(80i3)', ADVANCE='NO') rdata(i,:)
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WRITE(*,'(" ]")')
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ENDDO
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!
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! Extend the dataset.
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!
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CALL h5dset_extent_f(dset, extdims, hdferr)
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!
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! Read from the extended dataset.
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!
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CALL h5dread_f(dset, H5T_NATIVE_INTEGER, rdata2, extdims, hdferr)
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!
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! Output the data to the screen.
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!
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WRITE(*, '("Dataset after extension:")')
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DO i=1, extdims(1)
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WRITE(*,'(" [")', ADVANCE='NO')
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WRITE(*,'(80i3)', ADVANCE='NO') rdata2(i,:)
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WRITE(*,'(" ]")')
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ENDDO
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!
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! Close and release resources.
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!
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CALL h5pclose_f(dcpl , hdferr)
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CALL h5dclose_f(dset , hdferr)
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CALL h5sclose_f(space, hdferr)
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CALL h5fclose_f(file , hdferr)
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END PROGRAM main
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