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+!************************************************************
+!
+! This example shows how to read and write fixed string size
+! datatypes to a dataset. The program first writes strings to a
+! dataset with a dataspace of DIM0, then closes the file.
+! Next, it reopens the file, reads back the data, and
+! outputs it to the screen.
+!
+! This file is intended for use with HDF5 Library version 1.8
+! with --enable-fortran2003
+!
+!************************************************************
+PROGRAM main
+
+ USE hdf5
+ USE ISO_C_BINDING
+
+ IMPLICIT NONE
+
+ CHARACTER(LEN=20), PARAMETER :: filename = "h5ex_t_string_F03.h5"
+ CHARACTER(LEN=3) , PARAMETER :: dataset = "DS1"
+ INTEGER , PARAMETER :: dim0 = 4
+ INTEGER(SIZE_T) , PARAMETER :: sdim = 8
+
+ INTEGER(HID_T) :: file, filetype, memtype, space, dset ! Handles
+ INTEGER :: hdferr
+ INTEGER(HSIZE_T), DIMENSION(1:1) :: dims = (/dim0/)
+ INTEGER(HSIZE_T), DIMENSION(1:1) :: maxdims
+
+ CHARACTER(LEN=sdim), DIMENSION(1:dim0), TARGET :: &
+ wdata = (/"Parting", "is such", "sweet ", "sorrow."/)
+ CHARACTER(LEN=sdim), DIMENSION(:), ALLOCATABLE, TARGET :: rdata
+ INTEGER :: i, len
+ INTEGER(SIZE_T) :: size
+ TYPE(C_PTR) :: f_ptr
+ !
+ ! Initialize FORTRAN interface.
+ !
+ CALL h5open_f(hdferr)
+ !
+ ! Create a new file using the default properties.
+ !
+ CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file, hdferr)
+
+ !
+ ! Create file datatypes. For this example we will save
+ ! the strings as FORTRAN strings
+ !
+ CALL H5Tcopy_f(H5T_FORTRAN_S1, filetype, hdferr)
+ CALL H5Tset_size_f(filetype, sdim, hdferr)
+ !
+ ! Create dataspace.
+ !
+ CALL h5screate_simple_f(1, dims, space, hdferr)
+ !
+ ! Create the dataset and write the string data to it.
+ !
+ CALL h5dcreate_f(file, dataset, filetype, space, dset, hdferr)
+
+ f_ptr = C_LOC(wdata(1)(1:1))
+ CALL H5Dwrite_f(dset, filetype, f_ptr, hdferr)
+
+ !
+ ! Close and release resources.
+ !
+ CALL h5dclose_f(dset , hdferr)
+ CALL h5sclose_f(space, hdferr)
+ CALL H5Tclose_f(filetype, hdferr)
+ CALL h5fclose_f(file , hdferr)
+ !
+ ! Now we begin the read section of this example.
+ !
+ ! Open file and dataset.
+ !
+ CALL h5fopen_f(filename, H5F_ACC_RDONLY_F, file, hdferr)
+ CALL h5dopen_f(file, dataset, dset, hdferr)
+ !
+ ! Get the datatype and its size.
+ !
+ CALL H5Dget_type_f(dset, filetype, hdferr)
+ CALL H5Tget_size_f(filetype, size, hdferr)
+
+ ! Make sure the declared length is large enough
+ IF(size.GT.sdim)THEN
+ PRINT*,'ERROR: Character LEN is to small'
+ STOP
+ ENDIF
+ !
+ ! Get dataspace.
+ !
+ CALL H5Dget_space_f(dset, space, hdferr)
+ CALL H5Sget_simple_extent_dims_f(space, dims, maxdims, hdferr)
+
+ ALLOCATE(rdata(1:dims(1)))
+ !
+ ! Create the memory datatype.
+ !
+ CALL H5Tcopy_f(H5T_FORTRAN_S1, memtype, hdferr)
+ CALL H5Tset_size_f(memtype, sdim, hdferr)
+ !
+ ! Read the data.
+ !
+ f_ptr = C_LOC(rdata(1)(1:1))
+ CALL H5Dread_f(dset, memtype, f_ptr, hdferr, space)
+ !
+ ! Output the data to the screen.
+ !
+ DO i = 1, dims(1)
+ WRITE(*,'(A,"(",I0,"): ", A)') DATASET, i, TRIM(rdata(i))
+ END DO
+ !
+ ! Close and release resources.
+ !
+ CALL H5Dclose_f(dset, hdferr)
+ CALL H5Sclose_f(space, hdferr)
+ CALL H5Tclose_f(memtype, hdferr)
+ CALL H5Fclose_f(file, hdferr)
+
+ DEALLOCATE(rdata)
+
+END PROGRAM main