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towupper(3c)
Standard C Library Functions towupper(3C)
NAME
towupper, towupper_l - transliterate lowercase wide-character code to
uppercase
SYNOPSIS
#include <wchar.h>
wint_t towupper(wint_t wc);
wint_t towupper_l(wint_t wc, locale_t locale);
DESCRIPTION
The towupper() function has as a domain a type wint_t, the value of
which must be a character representable as a wchar_t, and must be a
wide-character code corresponding to a valid character in the current
locale or the value of WEOF. If the argument has any other value, the
argument is returned unchanged. If the argument of towupper() repre‐
sents a lowercase wide-character code (as defined by character type
information in the program locale category LC_CTYPE), the result is the
corresponding uppercase wide-character code. All other arguments in the
domain are returned unchanged.
The towupper_l() function is equivalent to the towupper() function,
except that the locale data used is from the locale represented by
locale.
The behavior is undefined if the locale argument to towupper_l() is the
special locale object LC_GLOBAL_LOCALE or is not a valid locale object
handle.
RETURN VALUES
Upon successful completion, towupper() and towupper_l() return the
uppercase letter corresponding to the argument passed. Otherwise, they
return the argument unchanged.
ERRORS
No errors are defined.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ CSIEnabled _ Interface StabilityStandard _ MT-LevelMT-
Safe
SEE ALSO
duplocale(3C), freelocale(3C), iswalpha(3C), newlocale(3C), setlo‐
cale(3C), towlower(3C), uselocale(3C), attributes(7), standards(7)
Oracle Solaris 11.4 11 May 2021 towupper(3C)