1 files changed, 35 insertions, 0 deletions
diff --git a/sys/etc/gmtcnv.x b/sys/etc/gmtcnv.x
new file mode 100644
index 00000000..7713c9c0
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+++ b/sys/etc/gmtcnv.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+# GMTCNV.X -- GMT (Greenwich mean time) to LST (local standard time, or clock
+# time) conversions.
+#
+#          gmt = lsttogmt (lst)                 # lst/gmt are in seconds
+#          lst = gmttolst (gmt)                 # lst/gmt are in seconds
+
+
+
+# GMTTOLST -- Convert a long integer value in GMT seconds to LST seconds.
+
+long procedure gmttolst (gmt)
+
+long	gmt			# GMT in seconds
+int	gmtco
+
+begin
+	call zgmtco (gmtco)
+	return (gmt - gmtco)
+end
+
+
+
+# LSTTOGMT -- Convert a long integer value in LST seconds to GMT seconds.
+
+long procedure lsttogmt (lst)
+
+long	lst			# LST in seconds
+int	gmtco
+
+begin
+	call zgmtco (gmtco)
+	return (lst + gmtco)
+end