определить длину строки широких символов фиксированного размера (determine the length of a fixed-size wide-character string)
Имя (Name)
wcsnlen - determine the length of a fixed-size wide-character
string
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
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.
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.
Версии (Versions)
The wcsnlen() function is provided in glibc since version 2.1.
Атрибуты (Attributes)
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│wcsnlen() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
Стандарты (Conforming to)
POSIX.1-2008.
Смотри также (See also)
strnlen(3), wcslen(3)
