diff options
author | glass <glass@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2012-11-13 02:12:40 +0000 |
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committer | glass <glass@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2012-11-13 02:12:40 +0000 |
commit | c5b19cf01cd15e0d9d8e2847ba746a5f361841df (patch) | |
tree | 1c7e44cbc22b88e90df137a0fc52a454d1c3ebdc /re.c | |
parent | d24e2d746f417a041499e66cc54bafdf221f00ad (diff) |
* re.c (rb_memsearch_ss): performance improvement by using memmem(3) if
possible. [ruby-dev:45530] [Feature #6311]
* configure.in: check existence of memmem(3) and that it is not broken.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37634 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 're.c')
-rw-r--r-- | re.c | 13 |
1 files changed, 13 insertions, 0 deletions
@@ -97,6 +97,18 @@ rb_memcmp(const void *p1, const void *p2, long len) return memcmp(p1, p2, len); } +#ifdef HAVE_MEMMEM +static inline long +rb_memsearch_ss(const unsigned char *xs, long m, const unsigned char *ys, long n) +{ + const unsigned char *y; + + if (y = memmem(ys, n, xs, m)) + return y - ys; + else + return -1; +} +#else static inline long rb_memsearch_ss(const unsigned char *xs, long m, const unsigned char *ys, long n) { @@ -132,6 +144,7 @@ rb_memsearch_ss(const unsigned char *xs, long m, const unsigned char *ys, long n } return y - ys - m; } +#endif static inline long rb_memsearch_qs(const unsigned char *xs, long m, const unsigned char *ys, long n) |