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! This is the F2003 version of the h5_compound.c example source code.
! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
! Copyright by the Board of Trustees of the University of Illinois. *
! All rights reserved. *
! *
! This file is part of HDF5. The full HDF5 copyright notice, including *
! terms governing use, modification, and redistribution, is contained in *
! the COPYING file, which can be found at the root of the source code *
! distribution tree, or in https://www.hdfgroup.org/licenses. *
! If you do not have access to either file, you may request a copy from *
! help@hdfgroup.org. *
! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
!
! This example shows how to create an array of a compound datatype which
! contains an array of type complex and how to write it to hdf5
! and how to read it back into a compound datatype for hdf5.
!
PROGRAM compound_complex_fortran2003
USE hdf5
USE ISO_C_BINDING
IMPLICIT NONE
INTEGER, PARAMETER :: r_k8 = KIND(0.0d0)
INTEGER, PARAMETER :: NMAX = 3
TYPE sample
COMPLEX(KIND=r_k8), DIMENSION(1:NMAX) :: nlev
REAL(KIND=r_k8) :: N
END TYPE sample
INTEGER(HID_T) :: sample_type_id, dset_id, dspace_id, file_id
INTEGER(HSIZE_T) :: dims(1) = (/NMAX/)
INTEGER :: error
TYPE(sample), DIMENSION(1:NMAX), TARGET :: samples, read_samples
INTEGER :: i
TYPE(C_PTR) :: f_ptr
INTEGER(HSIZE_T), DIMENSION(1) :: array_dims=(/2*NMAX/) ! complex is really (real,real) so double size of array
INTEGER(hid_t) :: array_type_id ! Nested Array Datatype ID
! Initialize data
DO i=1,NMAX
samples(i)%nlev(1:NMAX) = (3.14159_r_k8, 2.71828_r_k8)
samples(i)%N = i
END DO
! Initialize FORTRAN interface.
CALL h5open_f(error)
! Create a new file using default properties.
CALL h5fcreate_f("test.h5", H5F_ACC_TRUNC_F, file_id, error)
!
! Create the memory data type.
!
CALL H5Tcreate_f(H5T_COMPOUND_F, H5OFFSETOF(C_LOC(samples(1)), C_LOC(samples(2))), sample_type_id, error)
! Create the array type
CALL h5Tarray_create_f(H5T_NATIVE_DOUBLE, 1, array_dims, array_type_id, error)
! Then use that array type to insert values into
CALL H5Tinsert_f( sample_type_id, "nlev", &
H5OFFSETOF(C_LOC(samples(1)),C_LOC(samples(1)%nlev(1))), array_type_id, error)
CALL H5Tinsert_f( sample_type_id, "N", &
H5OFFSETOF(C_LOC(samples(1)),C_LOC(samples(1)%N)), h5kind_to_type(r_k8,H5_REAL_KIND), error)
!
! Create dataspace
!
CALL h5screate_simple_f(1, dims, dspace_id, error)
!
! Create the dataset.
!
CALL H5Dcreate_f(file_id, "samples", sample_type_id, dspace_id, dset_id, error)
!
! Write data to the dataset
!
f_ptr = C_LOC(samples(1))
CALL H5Dwrite_f(dset_id, sample_type_id, f_ptr, error)
! Close up
CALL h5dclose_f(dset_id, error)
CALL h5sclose_f(dspace_id, error)
CALL h5fclose_f(file_id, error)
!
! Open the file and the dataset.
!
CALL H5Fopen_f("test.h5", H5F_ACC_RDONLY_F, file_id, error)
CALL H5Dopen_f(file_id, "samples", dset_id, error)
!
! Create the memory data type.
!
CALL H5Tcreate_f(H5T_COMPOUND_F,H5OFFSETOF(C_LOC(samples(1)), C_LOC(samples(2))), sample_type_id,error)
CALL H5Tinsert_f( sample_type_id, "nlev", &
H5OFFSETOF(C_LOC(samples(1)),C_LOC(samples(1)%nlev(1))), array_type_id, error)
CALL H5Tinsert_f( sample_type_id, "N", &
H5OFFSETOF(C_LOC(samples(1)),C_LOC(samples(1)%N)), h5kind_to_type(r_k8,H5_REAL_KIND), error)
f_ptr = C_LOC(read_samples(1))
CALL H5Dread_f(dset_id, sample_type_id, f_ptr, error)
!
! Display the fields
!
DO i=1,NMAX
WRITE(*,'(A,3(" (",F8.5,",",F8.5,")"))') "SAMPLES =",read_samples(i)%nlev(1:NMAX)
WRITE(*,'(A,F8.5)') "N =", read_samples(i)%N
END DO
CALL H5Tclose_f(sample_type_id, error)
CALL H5Dclose_f(dset_id, error)
CALL H5Fclose_f(file_id, error)
END PROGRAM compound_complex_fortran2003
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