dist/ntp/libntp/calyearstart.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * calyearstart - determine the NTP time at midnight of January 1 in
   5  *                the year of the given date.
   6  */
   7 #include <sys/types.h>
   8
   9 #include "ntp_types.h"
  10 #include "ntp_calendar.h"
  11 #include "ntp_stdlib.h"
  12
  13 u_long
  14 calyearstart(u_long ntp_time)
  15 {
  16     struct calendar jt;
  17
  18     caljulian(ntp_time,&jt);
  19     jt.yearday  = 1;
  20     jt.monthday = 1;
  21     jt.month    = 1;
  22     jt.hour = jt.minute = jt.second = 0;
  23     return caltontp(&jt);
  24 }