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Diffstat (limited to 'HDF5Examples/FORTRAN/H5T/h5ex_t_stringCatt_F03.F90')
-rw-r--r-- | HDF5Examples/FORTRAN/H5T/h5ex_t_stringCatt_F03.F90 | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/HDF5Examples/FORTRAN/H5T/h5ex_t_stringCatt_F03.F90 b/HDF5Examples/FORTRAN/H5T/h5ex_t_stringCatt_F03.F90 new file mode 100644 index 0000000..7692170 --- /dev/null +++ b/HDF5Examples/FORTRAN/H5T/h5ex_t_stringCatt_F03.F90 @@ -0,0 +1,136 @@ +!************************************************************ +! +! This example shows how to read and write fixed C string datatypes +! to an attribute. The program first writes C strings to an +! attribute 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=24), PARAMETER :: filename = "h5ex_t_stringCatt_F03.h5" + CHARACTER(LEN=3) , PARAMETER :: dataset = "DS1" + CHARACTER(LEN=2) , PARAMETER :: attribute = "A1" + INTEGER , PARAMETER :: dim0 = 4 + INTEGER(SIZE_T) , PARAMETER :: sdim = 7 + + INTEGER(HID_T) :: file, filetype, memtype, space, dset, attr ! 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 + 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 and memory datatypes. For this example we will save + ! the strings as C strings + ! + ! Include the NULL TERMINATION of string in C (i.e. add +1 to the length) + + CALL H5Tcopy_f(H5T_C_S1, filetype, hdferr) + CALL H5Tset_size_f(filetype, sdim+1, hdferr) + + CALL H5Tcopy_f( H5T_FORTRAN_S1, memtype, hdferr) + CALL H5Tset_size_f(memtype, sdim, hdferr) + ! + ! Create dataset with a null dataspace. + ! + CALL H5Screate_f(H5S_NULL_F, space, hdferr) + CALL h5dcreate_f(file, dataset, H5T_STD_I32LE, space, dset, hdferr) + CALL H5Sclose_f(space, hdferr) + ! + ! Create dataspace. + ! + CALL h5screate_simple_f(1, dims, space, hdferr) + ! + ! Create the attribute and write the string data to it. + ! + CALL H5Acreate_f(dset, attribute, filetype, space, attr, hdferr) + + f_ptr = C_LOC(wdata(1)(1:1)) + CALL H5Awrite_f(attr, memtype, f_ptr, hdferr) + ! + ! Close and release resources. + ! + CALL h5aclose_f(attr, hdferr) + CALL h5dclose_f(dset , hdferr) + CALL h5sclose_f(space, hdferr) + CALL H5tclose_f(filetype, hdferr) + CALL H5tclose_f(memtype, 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) + CALL h5aopen_f(dset, attribute, attr, hdferr) + ! + ! Get the datatype and its size. + ! + CALL H5Aget_type_f(attr, filetype, hdferr) + CALL H5Tget_size_f(filetype, size, hdferr) + + ! Make sure the declared length is large enough + IF(size.GT.sdim + 1)THEN + PRINT*,'ERROR: Character LEN is to small' + STOP + ENDIF + ! + ! Get dataspace and allocate memory for read buffer. + ! + CALL H5Aget_space_f(attr, 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 H5Aread_f(attr, memtype, f_ptr, hdferr) + ! + ! Output the data to the screen. + ! + DO i = 1, dims(1) + WRITE(*,'(A,"(",I0,"): ", A)') attribute, i, rdata(i) + END DO + ! + ! Close and release resources. + ! + CALL H5Aclose_f(attr, hdferr) + 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 |