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towupper - convert a wide character to uppercase
#include <wctype.h>
wint_t towupper (wint_t wc);
The towupper function is the wide-character
equivalent of the toupper function. If wc is a wide character, it is converted
to uppercase. Characters which do not have case are returned unchanged. If
wc is WEOF, WEOF is returned.
The towupper function returns
the uppercase equivalent of wc, or WEOF if wc is WEOF.
ISO/ANSI
C, UNIX98
towlower(3)
, towctrans(3)
, iswupper(3)
The behaviour
of towupper depends on the LC_CTYPE category of the current locale.
This
function is not very appropriate for dealing with Unicode characters, because
Unicode knows about three cases: upper, lower and title case.
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