1 files changed, 90 insertions, 0 deletions
diff --git a/usr.sbin/xntpd/lib/caltontp.c b/usr.sbin/xntpd/lib/caltontp.c
new file mode 100644
index 0000000..f5da0ab
--- /dev/null
+++ b/usr.sbin/xntpd/lib/caltontp.c
@@ -0,0 +1,90 @@
+/* caltontp.c,v 3.1 1993/07/06 01:08:04 jbj Exp
+ * caltontp - convert a julian date to an NTP time
+ */
+#include <sys/types.h>
+
+#include "ntp_types.h"
+#include "ntp_calendar.h"
+#include "ntp_stdlib.h"
+
+/*
+ * calmonthtab - month start offsets from the beginning of a cycle.
+ */
+static u_short calmonthtab[12] = {
+	0,						/* March */
+	MAR,						/* April */
+	(MAR+APR),					/* May */
+	(MAR+APR+MAY),					/* June */
+	(MAR+APR+MAY+JUN),				/* July */
+	(MAR+APR+MAY+JUN+JUL),				/* August */
+	(MAR+APR+MAY+JUN+JUL+AUG),			/* September */
+	(MAR+APR+MAY+JUN+JUL+AUG+SEP),			/* October */
+	(MAR+APR+MAY+JUN+JUL+AUG+SEP+OCT),		/* November */
+	(MAR+APR+MAY+JUN+JUL+AUG+SEP+OCT+NOV),		/* December */
+	(MAR+APR+MAY+JUN+JUL+AUG+SEP+OCT+NOV+DEC),	/* January */
+	(MAR+APR+MAY+JUN+JUL+AUG+SEP+OCT+NOV+DEC+JAN),	/* February */
+};
+
+U_LONG
+caltontp(jt)
+	register const struct calendar *jt;
+{
+	register int cyear;
+	register int resyear;
+	register U_LONG nt;
+	register int yearday;
+
+	/*
+	 * Find the start of the cycle this is in.
+	 */
+	cyear = (int)(jt->year - 1900) >> 2;
+	resyear = (jt->year - 1900) - (cyear << 2);
+	yearday = 0;
+	if (resyear == 0) {
+		if (jt->yearday == 0) {
+			if (jt->month == 1 || jt->month == 2) {
+				cyear--;
+				resyear = 3;
+			}
+		} else {
+			if (jt->yearday <= (u_short)(JAN+FEBLEAP)) {
+				cyear--;
+				resyear = 3;
+				yearday = calmonthtab[10] + jt->yearday;
+			} else {
+				yearday = jt->yearday - (JAN+FEBLEAP);
+			}
+		}
+	} else {
+		if (jt->yearday == 0) {
+			if (jt->month == 1 || jt->month == 2)
+				resyear--;
+		} else {
+			if (jt->yearday <= (u_short)(JAN+FEB)) {
+				resyear--;
+				yearday = calmonthtab[10] + jt->yearday;
+			} else {
+				yearday = jt->yearday - (JAN+FEB);
+			}
+		}
+	}
+
+	if (yearday == 0) {
+		if (jt->month >= 3) {
+			yearday = calmonthtab[jt->month - 3] + jt->monthday;
+		} else {
+			yearday = calmonthtab[jt->month + 9] + jt->monthday;
+		}
+	}
+
+	nt = TIMESDPERC((U_LONG)cyear);
+	while (resyear-- > 0)
+		nt += DAYSPERYEAR;
+	nt += (U_LONG) (yearday - 1);
+
+	nt = TIMES24(nt) + (U_LONG)jt->hour;
+	nt = TIMES60(nt) + (U_LONG)jt->minute;
+	nt = TIMES60(nt) + (U_LONG)jt->second;
+
+	return nt + MAR1900;
+}