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TOWUPPER(3) Linux Programmer's Manual TOWUPPER(3)
towupper - convert a wide character to uppercase
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.
GNU 1999-07-25 TOWUPPER(3)
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