lib/src/version.c

   1 /* version.c -- Version handling.
   2  * Copyright (C) 2002, 2004, 2005  Simon Josefsson
   3  *
   4  * This file is part of GNU SASL Library.
   5  *
   6  * GNU SASL Library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public License
   8  * as published by the Free Software Foundation; either version 2.1 of
   9  * the License, or (at your option) any later version.
  10  *
  11  * GNU SASL Library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License License along with GNU SASL Library; if not, write to the
  18  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  * Boston, MA 02110-1301, USA.
  20  *
  21  */
  22
  23 #include "internal.h"
  24
  25 #include <strverscmp.h>
  26
  27 /**
  28  * gsasl_check_version:
  29  * @req_version: version string to compare with, or NULL.
  30  *
  31  * Check library version.
  32  *
  33  * See %GSASL_VERSION for a suitable @req_version string.
  34  *
  35  * Return value: Check that the the version of the library is at
  36  *   minimum the one given as a string in @req_version and return the
  37  *   actual version string of the library; return 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 *
  42 gsasl_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 }