Messages in this thread Patch in this message | | | From | Namhyung Kim <> | Subject | [PATCH v3 1/4] perf util: Add parse_nsec_time() function | Date | Tue, 4 Jun 2013 10:50:29 +0900 |
| |
From: Namhyung Kim <namhyung.kim@lge.com>
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.
Cc: David Ahern <dsahern@gmail.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> --- 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 59d868add275..205972f6addb 100644 --- a/tools/perf/util/util.c +++ b/tools/perf/util/util.c @@ -269,3 +269,36 @@ void perf_debugfs_set_path(const char *mntpt) snprintf(debugfs_mountpoint, strlen(debugfs_mountpoint), "%s", mntpt); set_tracing_events_path(mntpt); } + +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 7a484c97e500..6c8baf312c8a 100644 --- a/tools/perf/util/util.h +++ b/tools/perf/util/util.h @@ -204,6 +204,8 @@ 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 -- 1.7.11.7
| |