hdf5/test/gen_nullspace.c

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * 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.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*
 * Programmer:  Quincey Koziol
 *              Saturday, April 17, 2004
 *
 * Purpose:	Create a dataset with a null dataspace and an attribute
 *      with a null dataspace.
 *		This program is used to create the test file `tnullspace.h5' which
 *      has dataspaces stored in the newer (version 2) style in the object headers.
 *		To build the test file, this program MUST be compiled and linked with
 *      the hdf5-1.7+ series of libraries and the generated test file must be
 *      put into the 'test' directory in the 1.6.x branch of the library.
 */

#include "h5test.h"

#define NULLFILE    "tnullspace.h5"
#define NULLDATASET "null_dataset"
#define NULLATTR    "null_attribute"

int
main(void)
{
    hid_t                        fid;  /* File ID */
    hid_t                        gid;  /* Group ID */
    hid_t                        sid;  /* Dataspace ID */
    hid_t                        did;  /* Dataset ID */
    hid_t                        attr; /* Attribute ID */
    herr_t H5_ATTR_NDEBUG_UNUSED ret;  /* Generic return value */

    /* Create the file */
    fid = H5Fcreate(NULLFILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    HDassert(fid > 0);

    sid = H5Screate(H5S_NULL);
    HDassert(sid > 0);

    /* Create dataset */
    did = H5Dcreate2(fid, NULLDATASET, H5T_NATIVE_UINT, sid, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    HDassert(did > 0);

    /* Close the dataset */
    ret = H5Dclose(did);
    HDassert(ret >= 0);

    /* Open the root group */
    gid = H5Gopen2(fid, "/", H5P_DEFAULT);
    HDassert(gid > 0);

    /* Create an attribute for the group */
    attr = H5Acreate2(gid, NULLATTR, H5T_NATIVE_INT, sid, H5P_DEFAULT, H5P_DEFAULT);
    HDassert(attr > 0);

    /* Close attribute */
    ret = H5Aclose(attr);
    HDassert(ret >= 0);

    /* Close the group */
    ret = H5Gclose(gid);
    HDassert(ret >= 0);

    /* Close the dataspace */
    ret = H5Sclose(sid);
    HDassert(ret >= 0);

    /* Close the file */
    ret = H5Fclose(fid);
    HDassert(ret >= 0);

    return EXIT_SUCCESS;
}