Home | History | Annotate | Line # | Download | only in libntp 
      1 /*	$NetBSD: ymd2yd.c,v 1.5 2020/05/25 20:47:25 christos Exp $	*/
      2 
      3 /*
      4  * ymd2yd - compute the date in the year from y/m/d
      5  *
      6  * A thin wrapper around a more general calendar function.
      7  */
      8 
      9 #include <config.h>
     10 #include "ntp_stdlib.h"
     11 #include "ntp_calendar.h"
     12 
     13 int
     14 ymd2yd(
     15 	int y,
     16 	int m,
     17 	int d)
     18 {
     19 	/*
     20 	 * convert y/m/d to elapsed calendar units, convert that to
     21 	 * elapsed days since the start of the given year and convert
     22 	 * back to unity-based day in year.
     23 	 *
     24 	 * This does no further error checking, since the underlying
     25 	 * function is assumed to work out how to handle the data.
     26 	 */
     27 	return ntpcal_edate_to_yeardays(y-1, m-1, d-1) + 1;
     28 }
     29