NAME
wcslen, wcsnlen
— find length of a wide
string
SYNOPSIS
#include
<wchar.h>
size_t
wcslen(const
wchar_t *s);
size_t
wcsnlen(const
wchar_t *s, size_t
maxlen);
DESCRIPTION
The
wcslen()
function computes the length of the wide string s. The
wcsnlen()
function computes the length of the wide string s, up
to maxlen wide characters. The
wcsnlen() function will never attempt to address
more than maxlen wide characters, making it suitable
for use with wide character arrays that are not guaranteed to be
NUL-terminated.
RETURN VALUES
The wcslen() function returns the number
of wide characters that precede the terminating null wide character.
The wcsnlen() function returns the number
of wide characters that precede the terminating null wide character or
maxlen, whichever is smaller.
SEE ALSO
STANDARDS
The wcslen() function conforms to
ISO/IEC 9899:1999 (“ISO C99”)
and was first introduced in ISO/IEC 9899/AMD1:1995
(“ISO C90, Amendment 1”). The
wcsnlen() function conforms to IEEE
Std 1003.1-2008 (“POSIX.1”).
HISTORY
The wcslen() function was ported from
NetBSD and first appeared in
OpenBSD 3.8. The wcsnlen()
function first appeared in OpenBSD 7.6.