Commit-ID: 3b47abe1b5f5446ab41a3a139b6075f46f77f21f
Gitweb: http://git.kernel.org/tip/3b47abe1b5f5446ab41a3a139b6075f46f77f21f
Author: Namhyung Kim <namhyung.kim@xxxxxxx>
AuthorDate: Tue, 4 Jun 2013 10:50:29 +0900
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Wed, 7 Aug 2013 17:35:26 -0300
perf util: Add parse_nsec_time() function
The parse_nsec_time() function is for parsing a string of time into
64-bit nsec value. It's a preparation of time filtering in some of perf
commands.
Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
Tested-by: David Ahern <dsahern@xxxxxxxxx>
Acked-by: David Ahern <dsahern@xxxxxxxxx>
Cc: Andi Kleen <andi@xxxxxxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/1370310629-9642-1-git-send-email-namhyung@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/util/util.c | 33 +++++++++++++++++++++++++++++++++
tools/perf/util/util.h | 2 ++
2 files changed, 35 insertions(+)
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 9a06584..6d17b18 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -328,3 +328,36 @@ void put_tracing_file(char *file)
{
free(file);
}
+
+int parse_nsec_time(const char *str, u64 *ptime)
+{
+ u64 time_sec, time_nsec;
+ char *end;
+
+ time_sec = strtoul(str, &end, 10);
+ if (*end != '.' && *end != '\0')
+ return -1;
+
+ if (*end == '.') {
+ int i;
+ char nsec_buf[10];
+
+ if (strlen(++end) > 9)
+ return -1;
+
+ strncpy(nsec_buf, end, 9);
+ nsec_buf[9] = '\0';
+
+ /* make it nsec precision */
+ for (i = strlen(nsec_buf); i < 9; i++)
+ nsec_buf[i] = '0';
+
+ time_nsec = strtoul(nsec_buf, &end, 10);
+ if (*end != '\0')
+ return -1;
+ } else
+ time_nsec = 0;
+
+ *ptime = time_sec * NSEC_PER_SEC + time_nsec;
+ return 0;
+}
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index cc1574e..a535359 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -208,6 +208,8 @@ static inline int has_extension(const char *filename, const char *ext)
#define NSEC_PER_MSEC 1000000L
#endif
+int parse_nsec_time(const char *str, u64 *ptime);
+
extern unsigned char sane_ctype[256];
#define GIT_SPACE 0x01
#define GIT_DIGIT 0x02
--
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