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      1 /*	$NetBSD: stime.h,v 1.4 2008/04/05 16:26:57 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _STIME_H_
     33 #define _STIME_H_
     34 
     35 /*
     36  * Convert a 2-digit year to a valid year as:
     37  *   00-68 <-> 2000-2068
     38  *   69-99 <-> 1969-1999
     39  *
     40  * Note: We choose the earliest year as 1969 rather than 1970 so that
     41  * dates near the Epoch (Jan 1, 1970 00:00:00 UTC) can be represented
     42  * with 2-digit years in all time zones.  This is the convention used
     43  * in parsedate(3), though it is not consistently applied in the
     44  * source tree.
     45  *
     46  * XXX - move this (or something like it) to time.h and use it
     47  *       consistently in the tree.
     48  */
     49 #define conv_2dig_year(y) ((y) < 69 ? (y) + 2000 : (y) + 1900)
     50 
     51 time_t	stime(char *);
     52 
     53 #endif /* _STIME_H_ */
     54