perf stdio: Separate hierarchy headers output

Introducing hists__fprintf_hierarchy_headers function to separate
hierarchy headers display code.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1465928361-2442-6-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/ui/stdio/hist.c

@@ -622,10 +622,25 @@ static int print_hierarchy_header(struct hists *hists, struct perf_hpp *hpp,
 	return 2;
 }
 
+static int
+hists__fprintf_hierarchy_headers(struct hists *hists,
+				 struct perf_hpp *hpp,
+				 FILE *fp)
+{
+	struct perf_hpp_list_node *fmt_node;
+	struct perf_hpp_fmt *fmt;
+
+	list_for_each_entry(fmt_node, &hists->hpp_formats, list) {
+		perf_hpp_list__for_each_format(&fmt_node->hpp, fmt)
+			perf_hpp__reset_width(fmt, hists);
+	}
+
+	return print_hierarchy_header(hists, hpp, symbol_conf.field_sep, fp);
+}
+
 static int hists__fprintf_headers(struct hists *hists, FILE *fp)
 {
 	struct perf_hpp_fmt *fmt;
-	struct perf_hpp_list_node *fmt_node;
 	unsigned int width;
 	const char *sep = symbol_conf.field_sep;
 	char bf[96];
@@ -637,13 +652,8 @@ static int hists__fprintf_headers(struct hists *hists, FILE *fp)
 
 	fprintf(fp, "# ");
 
-	if (symbol_conf.report_hierarchy) {
-		list_for_each_entry(fmt_node, &hists->hpp_formats, list) {
-			perf_hpp_list__for_each_format(&fmt_node->hpp, fmt)
-				perf_hpp__reset_width(fmt, hists);
-		}
-		return print_hierarchy_header(hists, &dummy_hpp, sep, fp);
-	}
+	if (symbol_conf.report_hierarchy)
+		return hists__fprintf_hierarchy_headers(hists, &dummy_hpp, fp);
 
 	hists__for_each_format(hists, fmt) {
 		if (perf_hpp__should_skip(fmt, hists))