Commit-ID: 3b47abe1b5f5446ab41a3a139b6075f46f77f21f Gitweb: http://git.kernel.org/tip/3b47abe1b5f5446ab41a3a139b6075f46f77f21f Author: Namhyung Kim <namhyung....@lge.com> AuthorDate: Tue, 4 Jun 2013 10:50:29 +0900 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> 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 <namhy...@kernel.org> Tested-by: David Ahern <dsah...@gmail.com> Acked-by: David Ahern <dsah...@gmail.com> Cc: Andi Kleen <a...@firstfloor.org> Cc: David Ahern <dsah...@gmail.com> Cc: Ingo Molnar <mi...@kernel.org> Cc: Jiri Olsa <jo...@redhat.com> Cc: Paul Mackerras <pau...@samba.org> Cc: Peter Zijlstra <a.p.zijls...@chello.nl> Cc: Stephane Eranian <eran...@google.com> Link: http://lkml.kernel.org/r/1370310629-9642-1-git-send-email-namhy...@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
