TOWLOWER(3) Linux Programmer's Manual TOWLOWER(3) NAME towlower, towlower_l - convert a wide character to lowercase SYNOPSIS #include <wctype.h> wint_t towlower(wint_t wc); wint_t towlower_l(wint_t wc, locale_t locale); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): towlower_l(): Since glibc 2.10: _XOPEN_SOURCE >= 700 Before glibc 2.10: _GNU_SOURCE DESCRIPTION The towlower() function is the wide-character equivalent of the tolower(3) function. If wc is an uppercase wide character, and there exists a lowercase equivalent in the current locale, it returns the lowercase equivalent of wc. In all other cases, wc is returned unchanged. The towupper_l() function performs the same task, but performs the con- version 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. The argument wc must be representable as a wchar_t and be a valid char- acter in the locale or be the value WEOF. RETURN VALUE If wc was convertible to lowercase, towlower() returns its lowercase equivalent; otherwise it returns wc. ATTRIBUTES Multithreading (see pthreads(7)) The towlower() function is thread-safe with exceptions. It can be safely used in multithreaded applications, as long as setlocale(3) is not called to change the locale during its execution. VERSIONS The towlower_l() function first appeared in glibc 2.3. CONFORMING TO towlower(): C99, POSIX.1-2001 (XSI); present as an XSI extension in POSIX.1-2008, but marked obsolete. towlower_l(): POSIX.1-2008. NOTES The behavior of these functions depends on the LC_CTYPE category of the locale. These functions are not very appropriate for dealing with Unicode char- acters, because Unicode knows about three cases: upper, lower and title case. SEE ALSO iswlower(3), towctrans(3), towupper(3), locale(7) COLOPHON This page is part of release 3.74 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 http://www.kernel.org/doc/man-pages/. GNU 2014-03-18 TOWLOWER(3)
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