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* posix/fnmatch_loop.c: Improve performance for single-byte
	character sets by not using btowc.
This commit is contained in:
Ulrich Drepper 2000-07-04 21:32:15 +00:00
parent ab9afc2193
commit 7239b3a4cf
2 changed files with 32 additions and 2 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
2000-07-04 Ulrich Drepper <drepper@redhat.com>
* posix/fnmatch_loop.c: Improve performance for single-byte
character sets by not using btowc.
* posix/tst-fnmatch.input: Add tests for locale dependent
behaviour.
* posix/tst-fnmatch.c (main): Also set LC_CTYPE category.

27
posix/fnmatch_loop.c
View File

@ -256,6 +256,33 @@ FCT (pattern, string, no_leading_period, flags)
/* Invalid character class name. */
return FNM_NOMATCH;
/* 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