new module 'iswxdigit'

[Bruno Haible]

Like for the "digit" class, POSIX provides a way to the libc implementor to
add non-ASCII characters to the "xdigit" character class. However, ISO C 99
section 7.25.2.1.12 takes that freedom away. The iswxdigit() function is not
ISO C compliant on a number of platforms. This series of patches provides
the workaround.


2020-01-25  Bruno Haible  <address@hidden>

        mbchar, wctype: Use the corrected iswxdigit function.
        * modules/mbchar (Depends-on): Add iswxdigit.
        * modules/wctype (Depends-on): Likewise.

        iswxdigit: Add tests.
        * tests/test-iswxdigit.c: New file.
        * tests/test-iswxdigit.sh: New file.
        * modules/iswxdigit-tests: New file.

        iswxdigit: New module.
        * m4/iswxdigit.m4: New file.
        * lib/wctype.in.h (iswxdigit): Potentially override.
        (iswxdigit, rpl_iswxdigit): Test REPLACE_ISWXDIGIT, not
        REPLACE_ISWCNTRL. Rely on ISO C compliant definition.
        * lib/iswxdigit.c: New file.
        * m4/wctype_h.m4 (gl_WCTYPE_H_DEFAULTS): Initialize GNULIB_ISWXDIGIT,
        REPLACE_ISWXDIGIT.
        * modules/wctype-h (Makefile.am): Substitute GNULIB_ISWXDIGIT,
        REPLACE_ISWXDIGIT.
        * modules/iswxdigit: New file.
        * doc/posix-functions/iswxdigit.texi: Mention the portability problem.

0001-iswxdigit-New-module.patch
Description: Text Data

0002-iswxdigit-Add-tests.patch
Description: Text Data

0003-mbchar-wctype-Use-the-corrected-iswxdigit-function.patch
Description: Text Data