/* Copyright (C) 1999, 2001-2002 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 Library General Public License as

   published by the Free Software Foundation; either version 2 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

   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public

   License along with the GNU C Library; see the file COPYING.LIB.  If not,

   see <http://www.gnu.org/licenses/>.  */

#ifdef HAVE_CONFIG_H

# include "config.h"

#endif

#include "egg-timegm.h"

#ifndef HAVE_TIMEGM

time_t

timegm(struct tm *t)

{

	time_t tl, tb;

	struct tm *tg;

	tl = mktime (t);

	if (tl == -1)

	{

		t->tm_hour--;

		tl = mktime (t);

		if (tl == -1)

			return -1;

		tl += 3600;

	    }

	tg = gmtime (&tl;;

	tg->tm_isdst = 0;

	tb = mktime (tg);

	if (tb == -1)

	{

		tg->tm_hour--;

		tb = mktime (tg);

		if (tb == -1)

			return -1;

		tb += 3600;

	}

	return (tl - (tb - tl));

}

#endif