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109 lines
3.6 KiB
Fortran
109 lines
3.6 KiB
Fortran
! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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! Copyright by The HDF Group. *
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! Copyright by the Board of Trustees of the University of Illinois. *
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! All rights reserved. *
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! *
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! This file is part of HDF5. The full HDF5 copyright notice, including *
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! terms governing use, modification, and redistribution, is contained in *
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! the COPYING file, which can be found at the root of the source code *
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! distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. *
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! If you do not have access to either file, you may request a copy from *
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! help@hdfgroup.org. *
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! * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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!
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! This example shows how to create and write a dataset attribute.
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! It opens the existing file 'dset.h5', obtains the identifier of
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! the dataset "/dset", defines attribute's dataspace,
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! creates dataset attribute, writes the attribute, and then closes
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! the attribute's dataspace, attribute, dataset, and file.
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!
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! This example is used in the HDF5 Tutorial.
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PROGRAM H5_CRTATT
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USE HDF5 ! This module contains all necessary modules
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IMPLICIT NONE
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CHARACTER(LEN=8), PARAMETER :: filename = "dsetf.h5" ! File name
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CHARACTER(LEN=4), PARAMETER :: dsetname = "dset" ! Dataset name
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CHARACTER(LEN=9), PARAMETER :: aname = "attr_long" ! Attribute name
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INTEGER(HID_T) :: file_id ! File identifier
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INTEGER(HID_T) :: dset_id ! Dataset identifier
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INTEGER(HID_T) :: attr_id ! Attribute identifier
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INTEGER(HID_T) :: aspace_id ! Attribute Dataspace identifier
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INTEGER(HID_T) :: atype_id ! Attribute Dataspace identifier
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INTEGER(HSIZE_T), DIMENSION(1) :: adims = (/2/) ! Attribute dimension
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INTEGER :: arank = 1 ! Attribure rank
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INTEGER(SIZE_T) :: attrlen ! Length of the attribute string
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CHARACTER(LEN=80), DIMENSION(2) :: attr_data ! Attribute data
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INTEGER :: error ! Error flag
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INTEGER(HSIZE_T), DIMENSION(1) :: data_dims
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!
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! Initialize attribute's data
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!
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attr_data(1) = "Dataset character attribute"
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attr_data(2) = "Some other string here "
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attrlen = 80
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!
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! Initialize FORTRAN interface.
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!
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CALL h5open_f(error)
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!
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! Open an existing file.
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!
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CALL h5fopen_f (filename, H5F_ACC_RDWR_F, file_id, error)
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!
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! Open an existing dataset.
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!
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CALL h5dopen_f(file_id, dsetname, dset_id, error)
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!
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! Create scalar data space for the attribute.
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!
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CALL h5screate_simple_f(arank, adims, aspace_id, error)
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!
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! Create datatype for the attribute.
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!
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CALL h5tcopy_f(H5T_NATIVE_CHARACTER, atype_id, error)
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CALL h5tset_size_f(atype_id, attrlen, error)
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!
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! Create dataset attribute.
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!
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CALL h5acreate_f(dset_id, aname, atype_id, aspace_id, attr_id, error)
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!
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! Write the attribute data.
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!
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data_dims(1) = 2
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CALL h5awrite_f(attr_id, atype_id, attr_data, data_dims, error)
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!
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! Close the attribute.
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!
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CALL h5aclose_f(attr_id, error)
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!
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! Close the attribute datatype.
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!
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CALL h5tclose_f(atype_id, error)
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!
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! Terminate access to the data space.
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!
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CALL h5sclose_f(aspace_id, error)
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!
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! End access to the dataset and release resources used by it.
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!
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CALL h5dclose_f(dset_id, error)
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!
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! Close the file.
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!
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CALL h5fclose_f(file_id, error)
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!
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! Close FORTRAN interface.
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!
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CALL h5close_f(error)
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END PROGRAM H5_CRTATT
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