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       1                 :            : /* version.c --- Version handling.
       2                 :            :  * Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
       3                 :            :  *               2010  Simon Josefsson
       4                 :            :  *
       5                 :            :  * This file is part of the Generic Security Service (GSS).
       6                 :            :  *
       7                 :            :  * GSS is free software; you can redistribute it and/or modify it
       8                 :            :  * under the terms of the GNU General Public License as published by
       9                 :            :  * the Free Software Foundation; either version 3 of the License, or
      10                 :            :  * (at your option) any later version.
      11                 :            :  *
      12                 :            :  * GSS is distributed in the hope that it will be useful, but WITHOUT
      13                 :            :  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
      14                 :            :  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
      15                 :            :  * License for more details.
      16                 :            :  *
      17                 :            :  * You should have received a copy of the GNU General Public License
      18                 :            :  * along with GSS; if not, see http://www.gnu.org/licenses or write to
      19                 :            :  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth
      20                 :            :  * Floor, Boston, MA 02110-1301, USA.
      21                 :            :  *
      22                 :            :  */
      23                 :            : 
      24                 :            : #include "internal.h"
      25                 :            : 
      26                 :            : #include <string.h>               /* for strverscmp */
      27                 :            : 
      28                 :            : /**
      29                 :            :  * gss_check_version:
      30                 :            :  * @req_version: version string to compare with, or NULL
      31                 :            :  *
      32                 :            :  * Check that the version of the library is at minimum the one
      33                 :            :  * given as a string in @req_version.
      34                 :            :  *
      35                 :            :  * WARNING: This function is a GNU GSS specific extension, and is not
      36                 :            :  * part of the official GSS API.
      37                 :            :  *
      38                 :            :  * Return value: The actual version string of the library; NULL if the
      39                 :            :  *   condition is not met.  If NULL is passed to this function no
      40                 :            :  *   check is done and only the version string is returned.
      41                 :            :  **/
      42                 :            : const char *
      43                 :          0 : gss_check_version (const char *req_version)
      44                 :            : {
      45 [ #  # ][ #  # ]:          0 :   if (!req_version || strverscmp (req_version, PACKAGE_VERSION) <= 0)
      46                 :          0 :     return PACKAGE_VERSION;
      47                 :            : 
      48                 :          0 :   return NULL;
      49                 :            : }