opensolaris man page for towlower

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  towlower_l() function performs the same task, but performs the conversion based on the character type information in the locale speci-
       fied by locale.	The behavior of towlower_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 character 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.

VERSIONS
       The towlower_l() function first appeared in glibc 2.3.

ATTRIBUTES
       For an explanation of the terms used in this section, see attributes(7).

       +-------------+---------------+----------------+
       |Interface    | Attribute     | Value	      |
       +-------------+---------------+----------------+
       |towlower()   | Thread safety | MT-Safe locale |
       +-------------+---------------+----------------+
       |towlower_l() | Thread safety | MT-Safe	      |
       +-------------+---------------+----------------+
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 characters, 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 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/.

GNU
								    2017-09-15							       TOWLOWER(3)