win32: fix fnmatch(3) handling of xdigit

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.

1 files changed, 1 insertions, 1 deletions

diff --git a/win32/fnmatch.c b/win32/fnmatch.c
index 5d2ea685d..0e76a7ba1 100644
--- a/win32/fnmatch.c
+++ b/win32/fnmatch.c
@@ -108,7 +108,7 @@ int index_in_strings(const char *strings, const char *key) FAST_FUNC;
 #   define IS_CHAR_CLASS(string) wctype (string)
 #  endif
 # else
-#  define CHAR_CLASS_MAX_LENGTH  6 /* Namely, `xdigit'.  */
+#  define CHAR_CLASS_MAX_LENGTH  7 /* Namely, `xdigit'.  */
 
 #  define IS_CHAR_CLASS(string)                                               \
    (STREQ (string, "alpha") || STREQ (string, "upper")                        \