[tip:perf/core] perf annotate: Simplify header dotted line sizing

["tip-bot for Peter Zijlstra (Intel)" <tipbot@zytor.com>]

Commit-ID:  53dd9b5f95dda95bcadda1b4680be42dfe1f9e5e
Gitweb:     http://git.kernel.org/tip/53dd9b5f95dda95bcadda1b4680be42dfe1f9e5e
Author:     Peter Zijlstra (Intel) <peterz@infradead.org>
AuthorDate: Thu, 30 Jun 2016 09:17:26 -0300
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Thu, 30 Jun 2016 09:21:03 -0300

perf annotate: Simplify header dotted line sizing

No need to use strlen, etc to figure that out, just use the return from
printf(), it will tell how wide the following line needs to be.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20160630082955.GA30921@twins.programming.kicks-ass.net
[ split from a larger patch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/annotate.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index c385fec..78e5d6f 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -1528,7 +1528,7 @@ int symbol__annotate_printf(struct symbol *sym, struct map *map,
 	int more = 0;
 	u64 len;
 	int width = 8;
-	int namelen, evsel_name_len, graph_dotted_len;
+	int graph_dotted_len;
 
 	filename = strdup(dso->long_name);
 	if (!filename)
@@ -1540,17 +1540,14 @@ int symbol__annotate_printf(struct symbol *sym, struct map *map,
 		d_filename = basename(filename);
 
 	len = symbol__size(sym);
-	namelen = strlen(d_filename);
-	evsel_name_len = strlen(evsel_name);
 
 	if (perf_evsel__is_group_event(evsel))
 		width *= evsel->nr_members;
 
-	printf(" %-*.*s|	Source code & Disassembly of %s for %s\n",
+	graph_dotted_len = printf(" %-*.*s|	Source code & Disassembly of %s for %s\n",
 	       width, width, "Percent", d_filename, evsel_name);
 
-	graph_dotted_len = width + namelen + evsel_name_len;
-	printf("-%-*.*s-----------------------------------------\n",
+	printf("%-*.*s----\n",
 	       graph_dotted_len, graph_dotted_len, graph_dotted_line);
 
 	if (verbose)