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[PATCH 10/15] perf tools: Change perf_mem__lvl_scnprintf to return nb of displayed bytes

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  [PATCH 10/15] perf tools: Change perf_mem__lvl_scnprintf to return nb of displayed bytes Jiri Olsa <jolsa@kernel.org> - 2016-02-24 09:50 +0100
    [tip:perf/core] perf tools: Change perf_mem__lvl_scnprintf to  return nb of displayed bytes tip-bot for Jiri Olsa <tipbot@zytor.com> - 2016-02-25 08:40 +0100

#1341656 — [PATCH 10/15] perf tools: Change perf_mem__lvl_scnprintf to return nb of displayed bytes

Moving strncat/strcpy calls into scnprintf to easily track
number of displayed bytes. It will be used in following patch.

Link: http://lkml.kernel.org/n/tip-9q9h9trua9zljnw26c56memh@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 tools/perf/util/mem-events.c | 13 +++++++------
 tools/perf/util/mem-events.h |  2 +-
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
index 7a4fb7e8159d..cd8241fea081 100644
--- a/tools/perf/util/mem-events.c
+++ b/tools/perf/util/mem-events.c
@@ -164,7 +164,7 @@ static const char * const mem_lvl[] = {
 	"Uncached",
 };
 
-void perf_mem__lvl_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
+int perf_mem__lvl_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
 {
 	size_t i, l = 0;
 	u64 m =  PERF_MEM_LVL_NA;
@@ -189,15 +189,16 @@ void perf_mem__lvl_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
 			strcat(out, " or ");
 			l += 4;
 		}
-		strncat(out, mem_lvl[i], sz - l);
-		l += strlen(mem_lvl[i]);
+		l += scnprintf(out + l, sz - l, mem_lvl[i]);
 	}
 	if (*out == '\0')
-		strcpy(out, "N/A");
+		l += scnprintf(out, sz - l, "N/A");
 	if (hit)
-		strncat(out, " hit", sz - l);
+		l += scnprintf(out + l, sz - l, " hit");
 	if (miss)
-		strncat(out, " miss", sz - l);
+		l += scnprintf(out + l, sz - l, " miss");
+
+	return l;
 }
 
 static const char * const snoop_access[] = {
diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h
index c6fb8a741fbb..9b7a273aeeee 100644
--- a/tools/perf/util/mem-events.h
+++ b/tools/perf/util/mem-events.h
@@ -27,7 +27,7 @@ char *perf_mem_events__name(int i);
 
 struct mem_info;
 int perf_mem__tlb_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
-void perf_mem__lvl_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
+int perf_mem__lvl_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
 void perf_mem__snp_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
 void perf_mem__lck_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
 
-- 
2.4.3

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#1342895 — [tip:perf/core] perf tools: Change perf_mem__lvl_scnprintf to return nb of displayed bytes

Commit-ID:  969075630e3abd1c740ac4f3183949cbf54b410d
Gitweb:     http://git.kernel.org/tip/969075630e3abd1c740ac4f3183949cbf54b410d
Author:     Jiri Olsa <jolsa@kernel.org>
AuthorDate: Wed, 24 Feb 2016 09:46:51 +0100
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Wed, 24 Feb 2016 10:30:14 -0300

perf tools: Change perf_mem__lvl_scnprintf to return nb of displayed bytes

Moving strncat/strcpy calls into scnprintf to easily track number of
displayed bytes. It will be used in following patch.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1456303616-26926-11-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/mem-events.c | 13 +++++++------
 tools/perf/util/mem-events.h |  2 +-
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
index b58d32e..249250f 100644
--- a/tools/perf/util/mem-events.c
+++ b/tools/perf/util/mem-events.c
@@ -149,7 +149,7 @@ static const char * const mem_lvl[] = {
 	"Uncached",
 };
 
-void perf_mem__lvl_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
+int perf_mem__lvl_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
 {
 	size_t i, l = 0;
 	u64 m =  PERF_MEM_LVL_NA;
@@ -174,15 +174,16 @@ void perf_mem__lvl_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
 			strcat(out, " or ");
 			l += 4;
 		}
-		strncat(out, mem_lvl[i], sz - l);
-		l += strlen(mem_lvl[i]);
+		l += scnprintf(out + l, sz - l, mem_lvl[i]);
 	}
 	if (*out == '\0')
-		strcpy(out, "N/A");
+		l += scnprintf(out, sz - l, "N/A");
 	if (hit)
-		strncat(out, " hit", sz - l);
+		l += scnprintf(out + l, sz - l, " hit");
 	if (miss)
-		strncat(out, " miss", sz - l);
+		l += scnprintf(out + l, sz - l, " miss");
+
+	return l;
 }
 
 static const char * const snoop_access[] = {
diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h
index 4141df6..0467f67 100644
--- a/tools/perf/util/mem-events.h
+++ b/tools/perf/util/mem-events.h
@@ -26,7 +26,7 @@ char *perf_mem_events__name(int i);
 
 struct mem_info;
 int perf_mem__tlb_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
-void perf_mem__lvl_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
+int perf_mem__lvl_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
 void perf_mem__snp_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
 void perf_mem__lck_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
 

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