Provides date of easter and other calendar related arithmetic.

1 files changed, 41 insertions, 0 deletions

diff --git a/lib/libcalendar/calendar.h b/lib/libcalendar/calendar.h
new file mode 100644
index 0000000..6c8d8f9
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+++ b/lib/libcalendar/calendar.h
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+/*-
+ * Copyright (c) 1997 Wolfgang Helbig
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	$Id$
+ */
+typedef struct date {
+	int y;	/* year */
+	int m;	/* month */
+	int d;	/* day */
+} date;
+
+date    *easterg(int _year, date *_dt);
+date    *easterj(int _year, date *_dt);
+date	*gdate(int _nd,  date *_dt);
+date	*jdate(int _nd, date *_dt);
+int	 ndaysg(date *_dt);
+int	 ndaysj(date *_dt);
+int	 week(int _nd, int *_year);
+int	 weekday(int _nd);