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WCSNLEN(3)                 Linux Programmer's Manual                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)):

           Since glibc 2.10:
               _XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
           Before glibc 2.10:

       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 charac-
       ter (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.

   Multithreading (see pthreads(7))
       The wcsnlen() function is thread-safe.


       strnlen(3), wcslen(3)

       This page is part of release 3.74 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

GNU                               2013-11-25                        WCSNLEN(3)

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