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
ymd2yd(int y,int m,int d)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