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| author | Ulrich Drepper <drepper@redhat.com> | 1999-02-16 21:21:52 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 1999-02-16 21:21:52 +0000 |
| commit | d30da2a80056799a51b8e04eb75f8b081d00cf56 (patch) | |
| tree | 7f076fb9ac75410dcedf09c6742c7a21357284cb | |
| parent | 6686d05a252164441b71bdb9864c07c1cb5a992b (diff) | |
| download | glibc-d30da2a80056799a51b8e04eb75f8b081d00cf56.tar glibc-d30da2a80056799a51b8e04eb75f8b081d00cf56.tar.gz glibc-d30da2a80056799a51b8e04eb75f8b081d00cf56.tar.bz2 glibc-d30da2a80056799a51b8e04eb75f8b081d00cf56.zip | |
Only use strncmp optimization if count argument is constant.
| -rw-r--r-- | string/bits/string2.h | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/string/bits/string2.h b/string/bits/string2.h index 0c28b3e122..3de175d0a8 100644 --- a/string/bits/string2.h +++ b/string/bits/string2.h @@ -687,12 +687,13 @@ __stpcpy_small (char *__dest, /* Compare N characters of S1 and S2. */ #ifndef _HAVE_STRING_ARCH_strncmp -# define strncmp(s1, s2, n) \ - (__extension__ (__builtin_constant_p (s1) && strlen (s1) < ((size_t) (n)) \ - ? strcmp (s1, s2) \ - : (__builtin_constant_p (s2) && strlen (s2) < ((size_t) (n))\ - ? strcmp (s1, s2) \ - : strncmp (s1, s2, n)))) +# define strncmp(s1, s2, n) \ + (__extension__ (__builtin_constant_p (n) \ + && ((__builtin_constant_p (s1) \ + && strlen (s1) < ((size_t) (n))) \ + || (__builtin_constant_p (s2) \ + && strlen (s2) < ((size_t) (n)))) \ + ? strcmp (s1, s2) : strncmp (s1, s2, n))) #endif |