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   wcsnlen    ( 3 )

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Имя (Name)

wcsnlen - determine the length of a fixed-size wide-character
       string

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Синопсис (Synopsis)

#include <wchar.h>

       size_t wcsnlen(const wchar_t *s, size_t maxlen);

   Feature Test Macro Requirements for glibc (see
   feature_test_macros(7)):

       wcsnlen():
           Since glibc 2.10:
               _POSIX_C_SOURCE >= 200809L
           Before glibc 2.10:
               _GNU_SOURCE

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Описание (Description)

The wcsnlen() function is the wide-character equivalent of the
       strnlen(3) function.  It returns the number of wide-characters in
       the string pointed to by s, not including the terminating null
       wide character (L'\0'), but at most maxlen wide characters (note:
       this parameter is not a byte count).  In doing this, wcsnlen()
       looks at only the first maxlen wide characters at s and never
       beyond s+maxlen.

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Возвращаемое значение (Return value)

The wcsnlen() function returns wcslen(s), if that is less than
       maxlen, or maxlen if there is no null wide character among the
       first maxlen wide characters pointed to by s.

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Версии (Versions)

The wcsnlen() function is provided in glibc since version 2.1.

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Атрибуты (Attributes)

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

       ┌──────────────────────────────────────┬───────────────┬─────────┐
       │Interface                             │ Attribute     │ Value   │
       ├──────────────────────────────────────┼───────────────┼─────────┤
       │wcsnlen()                             │ Thread safety │ MT-Safe │
       └──────────────────────────────────────┴───────────────┴─────────┘

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Стандарты (Conforming to)

POSIX.1-2008.

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Смотри также (See also)

strnlen(3), wcslen(3)

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