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@node wcwidth
@section @code{wcwidth}
@findex wcwidth
POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/wcwidth.html}
Gnulib module: wcwidth
Portability problems fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
Minix 3.1.8, mingw, MSVC 14.
@item
This function is not declared (without @code{-D_GNU_SOURCE}) on some platforms:
glibc 2.8.
@item
This function handles combining characters in UTF-8 locales incorrectly on some
platforms:
NetBSD 9.0, OpenBSD 5.8.
@item
This function returns 2 for characters with ambiguous east asian width, even in
Western locales, on some platforms:
Solaris 11.4.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
@item
On Windows and 32-bit AIX platforms, @code{wchar_t} is a 16-bit type and therefore cannot
accommodate all Unicode characters.
@item
This function treats zero-width spaces like control characters on some
platforms:
AIX 7.2.
@end itemize
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