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Add a routine to detect the names of character classes. Use it
in fnmatch(3) and regcomp(3), replacing local code in the former.
Saves 216 bytes.
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The glob pattern '[[:xdigit::]]*' didn't return the matches
expected. It turns out the implementation (from glibc) fails
to detect 'xdigit' as a valid character class. Changing the
definition of CHAR_CLASS_MAX_LENGTH to 7 fixes the problem.
This was never an issue in glibc because it uses a different
definition. More modern versions of fnmatch(3) in glibc and
gnulib also make CHAR_CLASS_MAX_LENGTH long enough.
The code for fnmatch(3) was taken from glibc at commit
7814856974388a856a575fa45f88d502c8a1ab29. This was the last
version before the code was rearraged to better support multibyte
characters.
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Replace several explicit string comparisons with a single call
to index_in_strings().
Saves 304 bytes.
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BusyBox ensures that strchrnul is always available, either from the
target platform or by including its own version. Therefore it isn't
necessary for fnmatch to use its equivalent.
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It would be more straight-forward to simply #include "libbb.h" which
includes a #define getenv mingw_getenv, but that header also defines
isprint() to a function that is nowhere to be found, leading to link
problems.
So let's go the easy route.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Ron Yorston <rmy@pobox.com>
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Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Ron Yorston <rmy@pobox.com>
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This was extracted from commit e56b799d6ad8afba4168fffa7218d44c041a72d2
in Git repository.
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