NAME

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

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

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.

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.

VERSIONS

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

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).
       ┌───────────┬───────────────┬─────────┐
       │ Interface │ Attribute     │ Value   │
       ├───────────┼───────────────┼─────────┤
       │ wcsnlen() │ Thread safety │ MT-Safe │
       └───────────┴───────────────┴─────────┘

CONFORMING TO

       POSIX.1-2008.

SEE ALSO

       strnlen(3), wcslen(3)

COLOPHON

       This page is part of release 5.10 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                                                2019-03-06                                         WCSNLEN(3)