TOWUPPERSection: Linux Programmer's Manual (3)
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NAMEtowupper - convert a wide character to uppercase
#include <wctype.h> wint_t towupper(wint_t wc);
DESCRIPTIONThe towupper() function is the wide-character equivalent of the toupper(3) 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.
RETURN VALUEThe towupper() function returns the uppercase equivalent of wc, or WEOF if wc is WEOF.
NOTESThe behavior of towupper() depends on the LC_CTYPE category of the current locale.
SEE ALSOiswupper(3), towctrans(3), towlower(3)
COLOPHONThis page is part of release 3.21 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.