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authorUlrich Drepper <drepper@redhat.com>2000-07-04 21:32:15 +0000
committerUlrich Drepper <drepper@redhat.com>2000-07-04 21:32:15 +0000
commit7239b3a4cfa50ecd088850d13202aeff5cf96e5f (patch)
tree4474786a0cbddbb64ae072aedc5cb1b3553223fc /posix/fnmatch_loop.c
parentab9afc21930563eb1aa648eff269ed0234a0bbc4 (diff)
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Update.
* posix/fnmatch_loop.c: Improve performance for single-byte character sets by not using btowc.
Diffstat (limited to 'posix/fnmatch_loop.c')
-rw-r--r--posix/fnmatch_loop.c31
1 files changed, 29 insertions, 2 deletions
diff --git a/posix/fnmatch_loop.c b/posix/fnmatch_loop.c
index 3a6dffb..ad729d2 100644
--- a/posix/fnmatch_loop.c
+++ b/posix/fnmatch_loop.c
@@ -256,8 +256,35 @@ FCT (pattern, string, no_leading_period, flags)
/* Invalid character class name. */
return FNM_NOMATCH;
- if (ISWCTYPE (BTOWC ((UCHAR) *n), wt))
- goto matched;
+ /* The following code is glibc specific but does
+ there a good job in sppeding up the code since
+ we can avoid the btowc() call. The
+ IS_CHAR_CLASS call will return a bit mask for
+ the 32-bit table. We have to convert it to a
+ bitmask for the __ctype_b table. This has to
+ be done based on the byteorder as can be seen
+ below. In any case we will fall back on the
+ code using btowc() if the class is not one of
+ the standard classes. */
+# if defined _LIBC && ! WIDE_CHAR_VERSION
+# if __BYTE_ORDER == __LITTLE_ENDIAN
+ if ((wt & 0xf0ffff) == 0)
+ {
+ wt >>= 16;
+ if ((__ctype_b[(UCHAR) *n] & wt) != 0)
+ goto matched;
+ }
+# else
+ if (wt <= 0x800)
+ {
+ if ((__ctype_b[(UCHAR) *n] & wt) != 0)
+ goto matched;
+ }
+# endif
+ else
+# endif
+ if (ISWCTYPE (BTOWC ((UCHAR) *n), wt))
+ goto matched;
#else
if ((STREQ (str, L("alnum")) && ISALNUM ((UCHAR) *n))
|| (STREQ (str, L("alpha")) && ISALPHA ((UCHAR) *n))