1 files changed, 58 insertions, 0 deletions
diff --git a/sys/clio/gexfls.x b/sys/clio/gexfls.x
new file mode 100644
index 00000000..5eadf759
--- /dev/null
+++ b/sys/clio/gexfls.x
@@ -0,0 +1,58 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+# GEXFLS -- Externally callable procedure for flushing graphics output.
+# Called by the CLIO procedure CLGCUR to flush graphics output prior to
+# a cursor read.  The main complication is that since CLGCUR is part of
+# the CLIO package and may be used in a program that does not generate
+# any graphics, we do not want to directly reference any GIO procedures
+# since this would force the linker to load much of GIO.
+
+procedure gexfls()
+
+int	gflush
+pointer	gp[2]
+common	/gxflcm/ gp, gflush
+
+begin
+	if (gflush != NULL) {
+	    if (gp[1] != NULL)
+		call zcall1 (gflush, gp[1])
+	    if (gp[2] != NULL)
+		call zcall1 (gflush, gp[2])
+	}
+end
+
+
+# GEXFLS_SET -- Set pointers to the gflush procedure for a stream.
+
+procedure gexfls_set (stream, gp_value, epa_gflush)
+
+int	stream			# graphics stream
+pointer	gp_value		# graphics descriptor
+int	epa_gflush		# EPA of the gflush procedure
+
+int	gflush
+pointer	gp[2]
+common	/gxflcm/ gp, gflush
+
+begin
+	if (stream == STDGRAPH || stream == STDIMAGE) {
+	    gp[stream-STDGRAPH+1] = gp_value
+	    gflush = epa_gflush
+	}
+end
+
+
+# GEXFLS_CLEAR -- Clear the pointer to the gflush procedure for a stream.
+
+procedure gexfls_clear (stream)
+
+int	stream			# graphics stream
+int	gflush
+pointer	gp[2]
+common	/gxflcm/ gp, gflush
+
+begin
+	if (stream == STDGRAPH || stream == STDIMAGE)
+	    gp[stream-STDGRAPH+1] = NULL
+end