xref: /titanic_50/usr/src/lib/libast/common/tm/tmxleap.c (revision 3e14f97f673e8a630f076077de35afdd43dc1587)
1da2e3ebdSchin /***********************************************************************
2da2e3ebdSchin *                                                                      *
3da2e3ebdSchin *               This software is part of the ast package               *
4*3e14f97fSRoger A. Faulkner *          Copyright (c) 1985-2010 AT&T Intellectual Property          *
5da2e3ebdSchin *                      and is licensed under the                       *
6da2e3ebdSchin *                  Common Public License, Version 1.0                  *
77c2fbfb3SApril Chin *                    by AT&T Intellectual Property                     *
8da2e3ebdSchin *                                                                      *
9da2e3ebdSchin *                A copy of the License is available at                 *
10da2e3ebdSchin *            http://www.opensource.org/licenses/cpl1.0.txt             *
11da2e3ebdSchin *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
12da2e3ebdSchin *                                                                      *
13da2e3ebdSchin *              Information and Software Systems Research               *
14da2e3ebdSchin *                            AT&T Research                             *
15da2e3ebdSchin *                           Florham Park NJ                            *
16da2e3ebdSchin *                                                                      *
17da2e3ebdSchin *                 Glenn Fowler <gsf@research.att.com>                  *
18da2e3ebdSchin *                  David Korn <dgk@research.att.com>                   *
19da2e3ebdSchin *                   Phong Vo <kpv@research.att.com>                    *
20da2e3ebdSchin *                                                                      *
21da2e3ebdSchin ***********************************************************************/
22da2e3ebdSchin #pragma prototyped
23da2e3ebdSchin /*
24da2e3ebdSchin  * Glenn Fowler
25da2e3ebdSchin  * AT&T Research
26da2e3ebdSchin  *
27da2e3ebdSchin  * Time_t conversion support
28da2e3ebdSchin  */
29da2e3ebdSchin 
30da2e3ebdSchin #include <tmx.h>
31da2e3ebdSchin 
32da2e3ebdSchin /*
33da2e3ebdSchin  * return t with leap seconds adjusted
34da2e3ebdSchin  * for direct localtime() access
35da2e3ebdSchin  */
36da2e3ebdSchin 
37da2e3ebdSchin Time_t
tmxleap(Time_t t)38da2e3ebdSchin tmxleap(Time_t t)
39da2e3ebdSchin {
40da2e3ebdSchin 	register Tm_leap_t*	lp;
41da2e3ebdSchin 	uint32_t		sec;
42da2e3ebdSchin 
43da2e3ebdSchin 	tmset(tm_info.zone);
44da2e3ebdSchin 	if (tm_info.flags & TM_ADJUST)
45da2e3ebdSchin 	{
46da2e3ebdSchin 		sec = tmxsec(t);
47da2e3ebdSchin 		for (lp = &tm_data.leap[0]; sec < (lp->time - lp->total); lp++);
48da2e3ebdSchin 		t = tmxsns(sec + lp->total, tmxnsec(t));
49da2e3ebdSchin 	}
50da2e3ebdSchin 	return t;
51da2e3ebdSchin }
52