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@node towupper
@section @code{towupper}
@findex towupper
POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/towupper.html}
Gnulib module: wctype-h
Portability problems fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
IRIX 5.3, Solaris 2.5.1.
@item
This function returns values of which the upper 16 bits are incorrect
on some platforms:
mingw.
@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
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