NAME
wcslen wcsnlen
— get length of a fixed-sized wide-character
string
SYNOPSIS
#include
<wchar.h>
size_t wcslen(const wchar_t *ws); [CX] size_t wcsnlen(const wchar_t *ws, size_t maxlen);
DESCRIPTION
For wcslen (): [CX] The
functionality described on this reference page is aligned with the ISO C
standard. Any conflict between the requirements described here and the ISO C
standard is unintentional. This volume of POSIX.1-2008 defers to the ISO C
standard.
The wcslen () function shall compute the
number of wide-character codes in the wide-character string to which
ws points, not including the terminating null
wide-character code.
[CX] The wcsnlen ()
function shall compute the smaller of the number of wide characters in the
string to which ws points, not including the terminating
null wide-character code, and the value of maxlen. The
wcsnlen () function shall never examine more than
the first maxlen characters of the wide-character string
pointed to by ws.
RETURN VALUE
The wcslen () function shall return the
length of ws.
[CX] The wcsnlen ()
function shall return an integer containing the smaller of either the length
of the wide-character string pointed to by ws or
maxlen.
No return values are reserved to indicate an error.
ERRORS
No errors are defined.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
XBD <wchar.h>
CHANGE HISTORY
First released in Issue 4. Derived from the MSE working draft.
Issue 7
The wcsnlen () function is added from The
Open Group Technical Standard, 2006, Extended API Set Part 1.