usr/src/lib/libast/common/tm/tmxleap.c

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