|WCSLEN(3P)||POSIX Programmer's Manual||WCSLEN(3P)|
size_t wcslen(const wchar_t *ws); size_t wcsnlen(const wchar_t *ws, size_t maxlen);
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.
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.
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.
The following sections are informative.
The Base Definitions volume of POSIX.1‐2008, <wchar.h>
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|2013||IEEE/The Open Group|