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authorNamhyung Kim <namhyung.kim@lge.com>2013-06-04 10:50:29 +0900
committerArnaldo Carvalho de Melo <acme@redhat.com>2013-08-07 17:35:26 -0300
commit3b47abe1b5f5446ab41a3a139b6075f46f77f21f (patch)
tree0b4308b875861f04b1675229fe2268697ed165ab
parent3223565cdf856fa07024e5db7ca24e1b1b38d1db (diff)
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@kernel.org> Tested-by: David Ahern <dsahern@gmail.com> Acked-by: David Ahern <dsahern@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1370310629-9642-1-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r--tools/perf/util/util.c33
-rw-r--r--tools/perf/util/util.h2
2 files changed, 35 insertions, 0 deletions
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 9a0658405760..6d17b18e915d 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 cc1574edcd9a..a53535949043 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