NetBSD/usr.bin/at/stime.h

/*	$NetBSD: stime.h,v 1.4 2008/04/05 16:26:57 christos Exp $	*/

/*
 * Copyright (c) 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _STIME_H_
#define _STIME_H_

/*
 * Convert a 2-digit year to a valid year as:
 *   00-68 <-> 2000-2068
 *   69-99 <-> 1969-1999
 *
 * Note: We choose the earliest year as 1969 rather than 1970 so that
 * dates near the Epoch (Jan 1, 1970 00:00:00 UTC) can be represented
 * with 2-digit years in all time zones.  This is the convention used
 * in parsedate(3), though it is not consistently applied in the
 * source tree.
 *
 * XXX - move this (or something like it) to time.h and use it
 *       consistently in the tree.
 */
#define conv_2dig_year(y) ((y) < 69 ? (y) + 2000 : (y) + 1900)

time_t	stime(char *);

#endif /* _STIME_H_ */