perf tools stdio: Display multiple header lines

Display multiple header lines in stdio output , if it's configured
within struct perf_hpp_list::nr_header_lines.

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/1470583710-1649-5-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/ui/stdio/hist.c b/tools/perf/ui/stdio/hist.c
index 91b8e10..9b807cb 100644 (file)
--- a/tools/perf/ui/stdio/hist.c
+++ b/tools/perf/ui/stdio/hist.c
@@ -639,13 +639,10 @@ hists__fprintf_hierarchy_headers(struct hists *hists,
        return print_hierarchy_header(hists, hpp, symbol_conf.field_sep, fp);
 }
 
-static int
-hists__fprintf_standard_headers(struct hists *hists,
-                               struct perf_hpp *hpp,
-                               FILE *fp)
+static void fprintf_line(struct hists *hists, struct perf_hpp *hpp,
+                        int line, FILE *fp)
 {
        struct perf_hpp_fmt *fmt;
-       unsigned int width;
        const char *sep = symbol_conf.field_sep;
        bool first = true;
 
@@ -658,14 +655,33 @@ hists__fprintf_standard_headers(struct hists *hists,
                else
                        first = false;
 
-               fmt->header(fmt, hpp, hists, 0);
+               fmt->header(fmt, hpp, hists, line);
                fprintf(fp, "%s", hpp->buf);
        }
+}
 
-       fprintf(fp, "\n");
+static int
+hists__fprintf_standard_headers(struct hists *hists,
+                               struct perf_hpp *hpp,
+                               FILE *fp)
+{
+       struct perf_hpp_list *hpp_list = hists->hpp_list;
+       struct perf_hpp_fmt *fmt;
+       unsigned int width;
+       const char *sep = symbol_conf.field_sep;
+       bool first = true;
+       int line;
+
+       for (line = 0; line < hpp_list->nr_header_lines; line++) {
+               /* first # is displayed one level up */
+               if (line)
+                       fprintf(fp, "# ");
+               fprintf_line(hists, hpp, line, fp);
+               fprintf(fp, "\n");
+       }
 
        if (sep)
-               return 1;
+               return hpp_list->nr_header_lines;
 
        first = true;
 
@@ -689,7 +705,7 @@ hists__fprintf_standard_headers(struct hists *hists,
 
        fprintf(fp, "\n");
        fprintf(fp, "#\n");
-       return 3;
+       return hpp_list->nr_header_lines + 2;
 }
 
 static int hists__fprintf_headers(struct hists *hists, FILE *fp)