1 files changed, 76 insertions, 0 deletions
diff --git a/ext/calendar/dow.c b/ext/calendar/dow.c
new file mode 100644
index 0000000..64ae008
--- /dev/null
+++ b/ext/calendar/dow.c
@@ -0,0 +1,76 @@
+
+/* $selId: dow.c,v 2.0 1995/10/24 01:13:06 lees Exp $
+ * Copyright 1993-1995, Scott E. Lee, all rights reserved.
+ * Permission granted to use, copy, modify, distribute and sell so long as
+ * the above copyright and this permission statement are retained in all
+ * copies.  THERE IS NO WARRANTY - USE AT YOUR OWN RISK.
+ */
+
+/**************************************************************************
+ *
+ * These are the externally visible components of this file:
+ *
+ *     int
+ *     DayOfWeek(
+ *         long int sdn);
+ *
+ * Convert a SDN to a day-of-week number (0 to 6).  Where 0 stands for
+ * Sunday, 1 for Monday, etc. and 6 stands for Saturday.
+ *
+ *     char *DayNameShort[7];
+ *
+ * Convert a day-of-week number (0 to 6), as returned from DayOfWeek(), to
+ * the abbreviated (three character) name of the day.
+ *
+ *     char *DayNameLong[7];
+ *
+ * Convert a day-of-week number (0 to 6), as returned from DayOfWeek(), to
+ * the name of the day.
+ *
+ **************************************************************************/
+
+#include "sdncal.h"
+
+int DayOfWeek(
+				 long int sdn)
+{
+	int dow;
+
+	dow = (sdn + 1) % 7;
+	if (dow >= 0) {
+		return (dow);
+	} else {
+		return (dow + 7);
+	}
+}
+
+char *DayNameShort[7] =
+{
+	"Sun",
+	"Mon",
+	"Tue",
+	"Wed",
+	"Thu",
+	"Fri",
+	"Sat"
+};
+
+char *DayNameLong[7] =
+{
+	"Sunday",
+	"Monday",
+	"Tuesday",
+	"Wednesday",
+	"Thursday",
+	"Friday",
+	"Saturday"
+};
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ * vim600: sw=4 ts=4 fdm=marker
+ * vim<600: sw=4 ts=4
+ */