perf hists browser: Introduce init()

Factoring out the hist_browser initialization code, so it could be used
from other parts in following patches.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
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/1466459899-1166-8-git-send-email-jolsa@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/ui/browsers/hists.c

@@ -2042,11 +2042,9 @@ static int hist_browser__dump(struct hist_browser *browser)
 	return 0;
 }
 
-struct hist_browser *hist_browser__new(struct hists *hists)
+void hist_browser__init(struct hist_browser *browser,
+			struct hists *hists)
 {
-	struct hist_browser *browser = zalloc(sizeof(*browser));
-
-	if (browser) {
 	struct perf_hpp_fmt *fmt;
 
 	browser->hists			= hists;
@@ -2060,7 +2058,14 @@ struct hist_browser *hist_browser__new(struct hists *hists)
 		perf_hpp__reset_width(fmt, hists);
 		++browser->b.columns;
 	}
-	}
+}
+
+struct hist_browser *hist_browser__new(struct hists *hists)
+{
+	struct hist_browser *browser = zalloc(sizeof(*browser));
+
+	if (browser)
+		hist_browser__init(browser, hists);
 
 	return browser;
 }

tools/perf/ui/browsers/hists.h

@@ -27,4 +27,6 @@ struct hist_browser {
 struct hist_browser *hist_browser__new(struct hists *hists);
 void hist_browser__delete(struct hist_browser *browser);
 int hist_browser__run(struct hist_browser *browser, const char *help);
+void hist_browser__init(struct hist_browser *browser,
+			struct hists *hists);
 #endif /* _PERF_UI_BROWSER_HISTS_H_ */