Manpages - wcsnlen.3

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

  #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

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.

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.

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

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

POSIX.1-2008.

*strnlen*(3), *wcslen*(3)

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