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   towlower_l    ( 3 )

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Имя (Name)

towlower, towlower_l - convert a wide character to lowercase

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Синопсис (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

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Описание (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 specified 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.

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Возвращаемое значение (Return value)

If wc was convertible to lowercase, towlower() returns its
       lowercase equivalent; otherwise it returns wc.

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Версии (Versions)

The towlower_l() function first appeared in glibc 2.3.

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Атрибуты (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        │
       └───────────────────────────────┴───────────────┴────────────────┘

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Стандарты (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.

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Примечание (Note)

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.

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Смотри также (See also)

iswlower(3), towctrans(3), towupper(3), locale(7)

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