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wcsnlen(3)


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 4.09 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/.



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