1 files changed, 45 insertions, 0 deletions
diff --git a/sys/plio/plubox.x b/sys/plio/plubox.x
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+++ b/sys/plio/plubox.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include <plset.h>
+include <plio.h>
+include "plbox.h"
+
+
+# PL_UBOX -- Regionrop ufcn for a box (rectangular) region.
+
+bool procedure pl_ubox (ufd, y, rl_reg, xs, npix)
+
+pointer	ufd			#I user function descriptor
+int	y			#I mask line number
+int	rl_reg[3,ARB]		#O output range list for line Y
+int	xs			#O start of edit region in dst mask
+int	npix			#O number of pixels affected
+
+int	rn
+bool	rl_new
+
+begin
+	rl_new = true
+	rn = RL_FIRST
+
+	if (y >= B_Y1(ufd) && y <= B_Y2(ufd)) {
+	    xs = B_X1(ufd)
+	    npix = B_X2(ufd) - B_X1(ufd) + 1
+
+	    RL_X(rl_reg,rn) = 1
+	    RL_N(rl_reg,rn) = npix
+	    RL_V(rl_reg,rn) = B_PV(ufd)
+
+	    rl_new = (y == B_Y1(ufd))
+	    rn = rn + 1
+
+	} else {
+	    npix = 0
+	    xs = 1
+	}
+
+	RL_LEN(rl_reg) = rn - 1
+	RL_AXLEN(rl_reg) = npix
+
+	return (rl_new)
+end