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Commit 3b47abe1 authored by Namhyung Kim's avatar Namhyung Kim Committed by Arnaldo Carvalho de Melo
Browse files

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: default avatarNamhyung Kim <namhyung@kernel.org>
Tested-by: default avatarDavid Ahern <dsahern@gmail.com>
Acked-by: default avatarDavid 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 3223565c

tools/perf/util/util.c

+33 −0
Original line number Original line Diff line number Diff line
@@ -328,3 +328,36 @@ void put_tracing_file(char *file) 
{

{

	free(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;

}

tools/perf/util/util.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -208,6 +208,8 @@ static inline int has_extension(const char *filename, const char *ext) 
#define NSEC_PER_MSEC	1000000L

#define NSEC_PER_MSEC	1000000L

#endif

#endif





int parse_nsec_time(const char *str, u64 *ptime);



extern unsigned char sane_ctype[256];

extern unsigned char sane_ctype[256];

#define GIT_SPACE		0x01

#define GIT_SPACE		0x01

#define GIT_DIGIT		0x02

#define GIT_DIGIT		0x02