1 files changed, 52 insertions, 0 deletions
diff --git a/pkg/xtools/ranges/rggxmark.gx b/pkg/xtools/ranges/rggxmark.gx
new file mode 100644
index 00000000..26108c98
--- /dev/null
+++ b/pkg/xtools/ranges/rggxmark.gx
@@ -0,0 +1,52 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<gset.h>
+include	<pkg/rg.h>
+
+# RG_GXMARK -- Mark x ranges.
+
+procedure rg_gxmark$t (gp, rstr, x, npts, pltype)
+
+pointer	gp				# GIO pointer
+char	rstr[ARB]			# Range string
+PIXEL	x[npts]				# Ordinates of graph
+int	npts				# Number of data points
+int	pltype				# Plot line type
+
+pointer	rg
+int	i, pltype1
+real	xl, xr, yb, yt, dy
+real	x1, x2, y1, y2, y3
+
+int	gstati(), stridxs()
+pointer	rg_xranges$t()
+
+begin
+	if (stridxs ("*", rstr) > 0)
+	    return
+
+	rg = rg_xranges$t (rstr, x, npts)
+
+	pltype1 = gstati (gp, G_PLTYPE)
+	call gseti (gp, G_PLTYPE, pltype)
+
+	call ggwind (gp, xl, xr, yb, yt)
+
+	dy = yt - yb
+	y1 = yb + dy / 100
+	y2 = y1 + dy / 20
+	y3 = (y1 + y2) / 2
+
+	do i = 1, RG_NRGS(rg) {
+	    x1 = x[RG_X1(rg, i)]
+	    x2 = x[RG_X2(rg, i)]
+	    if ((x1 > xl) && (x1 < xr))
+	        call gline (gp, x1, y1, x1, y2)
+	    if ((x2 > xl) && (x2 < xr))
+	        call gline (gp, x2, y1, x2, y2)
+	    call gline (gp, x1, y3, x2, y3)
+	}
+
+	call gseti (gp, G_PLTYPE, pltype1)
+	call rg_free (rg)
+end