/* Convert UTC calendar time to simple time. Like mktime but assumes UTC. Copyright (C) 1994, 1997, 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #ifdef HAVE_CONFIG_H # include <config.h> #endif #ifdef _LIBC # include <time.h> #else # include "timegm.h" /* Portable standalone applications should supply a "time_r.h" that declares a POSIX-compliant gmtime_r, for the benefit of older implementations that lack gmtime_r or have a nonstandard one. See the gnulib time_r module for one way to implement this. */ # include <time_r.h> # undef __gmtime_r # define __gmtime_r gmtime_r time_t __mktime_internal (struct tm *, struct tm * (*) (time_t const *, struct tm *), time_t *); #endif time_t timegm (struct tm *tmp) { static time_t gmtime_offset; tmp->tm_isdst = 0; return __mktime_internal (tmp, __gmtime_r, &gmtime_offset); }