vsc: New VSC_IsRaw() function in the API

include/vapi/vsc.h

@@ -161,6 +161,11 @@ const struct VSC_level_desc *VSC_ChangeLevel(const struct VSC_level_desc*, int);
 	 * Change a level up or down.
 	 */
 
+unsigned VSC_IsRaw(const struct vsc *);
+	/*
+	 * Returns zero if gauges are adjusted by VSC_Value().
+	 */
+
 static inline uint64_t
 VSC_Value(const struct VSC_point * const pt)
 {

lib/libvarnishapi/libvarnishapi.map

@@ -195,3 +195,11 @@ LIBVARNISHAPI_2.5 {	/* 2020-09-15 release */
     local:
 	*;
 };
+
+LIBVARNISHAPI_2.6 {	/* 2020-03-15 release */
+    global:
+	# vsc.c
+	VSC_IsRaw;
+    local:
+	*;
+};

lib/libvarnishapi/vsc.c

@@ -191,6 +191,13 @@ VSC_Arg(struct vsc *vsc, char arg, const char *opt)
 	}
 }
 
+unsigned
+VSC_IsRaw(const struct vsc *vsc)
+{
+
+	CHECK_OBJ_NOTNULL(vsc, VSC_MAGIC);
+	return (vsc->raw);
+}
 
 /*--------------------------------------------------------------------
  */