From fa080de7afc95aa1c19a6e6fc0e0708ced2eadc4 Mon Sep 17 00:00:00 2001
From: Joseph Hunkeler <jhunkeler@gmail.com>
Date: Wed, 8 Jul 2015 20:46:52 -0400
Subject: Initial commit

---
 sys/osb/achtu.gc | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 sys/osb/achtu.gc

(limited to 'sys/osb/achtu.gc')

diff --git a/sys/osb/achtu.gc b/sys/osb/achtu.gc
new file mode 100644
index 00000000..35e8f226
--- /dev/null
+++ b/sys/osb/achtu.gc
@@ -0,0 +1,37 @@
+/* Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+ */
+
+#define	import_spp
+#define import_knames
+#include <iraf.h>
+
+/* ACHTU_ -- Unpack an unsigned short integer array into an SPP datatype.
+ * [MACHDEP]: The underscore appended to the procedure name is OS dependent.
+ */
+void
+ACHTU$T (
+  XUSHORT  	*a,
+  XPIXEL   	*b,
+  XINT	   	*npix
+)
+{
+	register XUSHORT *ip;
+	register XPIXEL	 *op;
+	register int	 n = *npix;
+
+	if (sizeof(*op) >= sizeof(*ip)) {
+	    for (ip = &a[n], op = &b[n];  ip > a;  )
+		$if (datatype == x)
+		    (--op)->r = (float) *--ip;
+		$else
+		    *--op = *--ip;
+		$endif
+	} else {
+	    for (ip=a, op=b;  --n >= 0;  )
+		$if (datatype == x)
+		    (op++)->r = (float) *ip++;
+		$else
+		    *op++ = *ip++;
+		$endif
+	}
+}
-- 
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