TOWUPPERSection: Linux Programmer's Manual (3)
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NAMEtowupper, towupper_l - convert a wide character to uppercase
#include <wctype.h> wint_t towupper(wint_t wc); wint_t towupper_l(wint_t wc, locale_t locale);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
- Since glibc 2.10:
- _XOPEN_SOURCE >= 700
- Before glibc 2.10:
DESCRIPTIONThe towupper() function is the wide-character equivalent of the toupper(3) function. If wc is a lowercase wide character, and there exists an uppercase equivalent in the current locale, it returns the uppercase equivalent of wc. In all other cases, wc is returned unchanged.
The towupper_l() function performs the same task, but performs the conversion based on the character type information in the locale specified by locale. The behavior of towupper_l() is undefined if locale is the special locale object LC_GLOBAL_LOCALE (see duplocale(3)) or is not a valid locale object handle.
RETURN VALUEIf wc was convertible to uppercase, towupper() returns its uppercase equivalent; otherwise it returns wc.
VERSIONSThe towupper_l() function first appeared in glibc 2.3.
ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7).
|towupper()||Thread safety||MT-Safe locale|
CONFORMING TOtowupper(): C99, POSIX.1-2001 (XSI); present as an XSI extension in POSIX.1-2008, but marked obsolete.
NOTESThe behavior of these functions depends on the LC_CTYPE category of the locale.
SEE ALSOiswupper(3), towctrans(3), towlower(3), locale(7)
COLOPHONThis page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
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