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@node btowc
@section @code{btowc}
@findex btowc

POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/btowc.html}

Gnulib module: btowc

Portability problems fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
Minix 3.1.8, HP-UX 11.00, IRIX 5.3, Solaris 2.6, mingw, Interix 3.5.
@item
This function returns WEOF for a NUL argument on some platforms:
Cygwin 1.7.2.
@item
This function does not return WEOF for an EOF argument on some platforms:
IRIX 6.5.
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@item
On AIX and Windows platforms, @code{wchar_t} is a 16-bit type and therefore cannot
accommodate all Unicode characters.
@end itemize