hdf5_ep

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

 * 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://support.hdfgroup.org/ftp/HDF5/releases.  *

 * If you do not have access to either file, you may request a copy from     *

 * help@hdfgroup.org.                                                        *

 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

​

/* This program demonstrates how to translate an external link created on

 * a Windows machine into a format that a *nix machine can read.

 * This is done by registering a new traversal function for external links.

 *

 * This example is designed to be run on Unix and will create an external

 * link with a Windows-style path.  Using the traversal function below,

 * the example then successfully follows the external link.

 *

 * The external link will create a  file called "u2w/u2w_target.h5".

 * The example will fail if the directory u2w does not exist.

 */

​

#include "hdf5.h"

#include <stdlib.h>

#include <string.h>

​

•

/* "Windows to Unix" traversal function for external links

 *

 * Translates a filename stored in Unix format to Windows format by replacing

 * forward slashes with backslashes.

 * Makes no attempt to handle Windows drive names (e.g., "C:\"), spaces within

 * file names, quotes, etc.  These are left as an exercise for the user. :)

 * Note that this may not be necessary on your system; many Windows systems can

 * understand Unix paths.

 */

static hid_t elink_unix2win_trav(const char *link_name, hid_t cur_group,

    const void *udata, size_t udata_size, hid_t lapl_id, hid_t dxpl_id)

{

    hid_t         fid;

    const char   *file_name;

    const char   *obj_name;

    char         *new_fname = NULL;     /* Buffer allocated to hold Unix file path */

    ssize_t       prefix_len;           /* External link prefix length */

    size_t        fname_len;

    size_t        start_pos;            /* Initial position in new_fname buffer */

    size_t        x;                    /* Counter variable */

    hid_t         ret_value = -1;