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/plio/plvalid.x | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 sys/plio/plvalid.x

(limited to 'sys/plio/plvalid.x')

diff --git a/sys/plio/plvalid.x b/sys/plio/plvalid.x
new file mode 100644
index 00000000..1d6482d9
--- /dev/null
+++ b/sys/plio/plvalid.x
@@ -0,0 +1,22 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<syserr.h>
+include	<plio.h>
+
+# PLVALID -- Verify the validity of a mask descriptor.
+
+procedure plvalid (pl)
+
+pointer	pl		#I open mask descriptor
+errchk	syserr
+
+begin
+	if (pl != NULL)
+	    if (PL_MAGIC(pl) == PL_MAGICVAL)
+		if (PL_LLBP(pl) == NULL)
+		    call syserr (SYS_PLINACTDES)
+		else
+		    return
+
+	call syserr (SYS_PLINVDES)
+end
-- 
cgit