Manpage of TOWUPPER
TOWUPPERSection: Linux Programmer's Manual (3)
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 wcis 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, wcis 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 localeis the special locale object LC_GLOBAL_LOCALE(see duplocale(3)) or is not a valid locale object handle.
RETURN VALUEIf wcwas 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_CTYPEcategory of the locale.
SEE ALSOiswupper(3), towctrans(3), towlower(3), locale(7)
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