1 files changed, 27 insertions, 0 deletions
diff --git a/noao/imred/ccdred/src/ccdflag.x b/noao/imred/ccdred/src/ccdflag.x
new file mode 100644
index 00000000..427365d2
--- /dev/null
+++ b/noao/imred/ccdred/src/ccdflag.x
@@ -0,0 +1,27 @@
+# CCDFLAG -- Determine if a CCD processing flag is set.  This is less than
+# obvious because of the need to use the default value to indicate a
+# false flag.
+
+bool procedure ccdflag (im, name)
+
+pointer	im		# IMIO pointer
+char	name[ARB]	# CCD flag name
+
+bool	flag, strne()
+pointer	sp, str1, str2
+
+begin
+	call smark (sp)
+	call salloc (str1, SZ_LINE, TY_CHAR)
+	call salloc (str2, SZ_LINE, TY_CHAR)
+
+	# Get the flag string value and the default value.
+	# The flag is true if the value and the default do not match.
+
+	call hdmgstr (im, name, Memc[str1], SZ_LINE)
+	call hdmgdef (name, Memc[str2], SZ_LINE)
+	flag = strne (Memc[str1], Memc[str2])
+
+	call sfree (sp)
+	return (flag)
+end