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@node wcrtomb
@section @code{wcrtomb}
@findex wcrtomb
POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/wcrtomb.html}
Gnulib module: wcrtomb
Portability problems fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
Minix 3.1.8, HP-UX 11.00, IRIX 6.5, mingw.
@item
This function produces wrong characters in the C locale on some platforms:
Android 4.3.
@item
This function returns 0 when the first argument is NULL in some locales on some platforms:
Solaris 11.3.
@item
This function does not ignore the second argument when the first argument is NULL on some platforms:
MSVC 14.
@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.
However, the ISO C11 function @code{c32rtomb}, provided by Gnulib module
@code{c32rtomb}, operates on 32-bit wide characters and therefore does not have
this limitation.
@end itemize
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