1 /* version.c --- Version handling.
2 * Copyright (C) 2002-2014 Simon Josefsson
3 *
4 * This file is part of the Generic Security Service (GSS).
5 *
6 * GSS is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * GSS is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
14 * License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with GSS; if not, see http://www.gnu.org/licenses or write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth
19 * Floor, Boston, MA 02110-1301, USA.
20 *
21 */
22
23 #include "internal.h"
24
25 #include <string.h> /* for strverscmp */
26
27 /**
28 * gss_check_version:
29 * @req_version: version string to compare with, or NULL
30 *
31 * Check that the version of the library is at minimum the one
32 * given as a string in @req_version.
33 *
34 * WARNING: This function is a GNU GSS specific extension, and is not
35 * part of the official GSS API.
36 *
37 * Return value: The actual version string of the library; NULL if the
38 * condition is not met. If NULL is passed to this function no
39 * check is done and only the version string is returned.
40 **/
41 const char *
gss_check_version(const char * req_version)42 gss_check_version (const char *req_version)
43 {
44 if (!req_version || strverscmp (req_version, PACKAGE_VERSION) <= 0)
45 return PACKAGE_VERSION;
46
47 return NULL;
48 }
49