towupper(3) Library Functions Manual towupper(3) towupper, towupper_l - (libc -lc) #include wint_t towupper(wint_t wc); wint_t towupper_l(wint_t wc, locale_t locale); glibc ( feature_test_macros(7)): towupper_l(): glibc 2.10: _XOPEN_SOURCE >= 700 glibc 2.10: _GNU_SOURCE towupper() toupper(3). wc wc. wc . towupper_l() locale. towupper_l() locale LC_GLOBAL_LOCALE ( duplocale(3)) . wc wchar_t WEOF. wc towupper() wc. attributes(7). +----------------------+------------------------------------+---------------------------------------------------------------------------------------------+ | | | | +----------------------+------------------------------------+---------------------------------------------------------------------------------------------+ |towupper() | | (locale) (MT-Safe) | +----------------------+------------------------------------+---------------------------------------------------------------------------------------------+ |towupper_l() | | MT-Safe | +----------------------+------------------------------------+---------------------------------------------------------------------------------------------+ towupper() C11 POSIX.1-2008 (XSI). towupper_l() POSIX.1-2008. towupper() C99, POSIX.1-2001 (XSI). POSIX.1-2008 (XSI). towupper_l() POSIX.1-2008. glibc 2.3. LC_CTYPE . : . iswupper(3), towctrans(3), towlower(3), locale(7) 3 . . : . 6.18 8 2026 towupper(3)