libicq2000/libicq2000/time_extra.h

   1 /*
   2  * Extra time functions
   3  * (Mainly to make up for deficiencies/quirks in libc implementations)
   4  *
   5  * Copyright (C) 2002 Barnaby Gray <barnaby@beedesign.co.uk>
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
  20  *
  21  */
  22
  23 #ifndef TIME_EXTRA_H
  24 #define TIME_EXTRA_H
  25
  26 #include <time.h>
  27
  28 namespace ICQ2000 {
  29
  30   /*
  31    * a function to reliably produce a time_t from a struct tm that is
  32    * known to be stored in GMT. The problem lies in that BSDs have
  33    * tm_gmtoff member of struct tm, whereas other POSIX systems use
  34    * the global timezone instead, and heavens knows for other more bizarre
  35    * unixes.
  36    */
  37   time_t gmt_mktime(struct tm *tm);
  38 }
  39
  40 #endif