[PATCH 08/18] perf string: Simplify ltrim() implementation

[Arnaldo Carvalho de Melo]

From: Arnaldo Carvalho de Melo <a...@redhat.com>

We don't need to use strlen(), a var, or check for the end explicitely,
isspace('\0') is false:

  [acme@jouet c]$ cat ltrim.c
  #include <ctype.h>
  #include <stdio.h>

  static char *ltrim(char *s)
  {
          while (isspace(*s))
                  ++s;
          return s;
  }

  int main(void)
  {
          printf("ltrim(\"\")='%s'\n", ltrim(""));
          return 0;
  }
  [acme@jouet c]$ ./ltrim
  ltrim("")=''
  [acme@jouet c]$

Cc: Jiri Olsa <jo...@kernel.org>
Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Taeung Song <treeze.tae...@gmail.com>
Link: http://lkml.kernel.org/n/tip-w3nk0x3pai2vojk2ab6kd...@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com>
---
 tools/perf/util/string.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/tools/perf/util/string.c b/tools/perf/util/string.c
index bddca519dd58..e8feb142c9c9 100644
--- a/tools/perf/util/string.c
+++ b/tools/perf/util/string.c
@@ -322,12 +322,8 @@ char *strxfrchar(char *s, char from, char to)
  */
 char *ltrim(char *s)
 {
-       int len = strlen(s);
-
-       while (len && isspace(*s)) {
-               len--;
+       while (isspace(*s))
                s++;
-       }
 
        return s;
 }
-- 
2.9.3