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@node mbsnrtowcs
@section @code{mbsnrtowcs}
@findex mbsnrtowcs
POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/mbsnrtowcs.html}
Gnulib module: mbsnrtowcs
Portability problems fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
FreeBSD 5.2.1, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, HP-UX 11, IRIX 6.5, Solaris 11.3, Cygwin 1.5.x, mingw, MSVC 14, Android 4.4.
@item
This function produces invalid wide characters 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.
However, the Gnulib function @code{mbsnrtoc32s}, provided by Gnulib module
@code{mbsnrtoc32s}, operates on 32-bit wide characters and therefore does not
have this limitation.
@item
The specification is not clear about whether this function should update the
conversion state when the first argument (the destination pointer) is NULL.
The glibc, Mac OS X, FreeBSD implementations do update the state in this case.
For portability, when passing a NULL destination argument, it is best to pass
a pointer to a temporary copy of the conversion state.
@end itemize
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