wcsnlen—get fixed-size wide-character string length #include <wchar.h>
size_t wcsnlen(const wchar_t *s, size_t maxlen);
Description
The wcsnlen function computes the number of wide-character codes
in the wide-character string pointed to by s not including the
terminating L'\0' wide character but at most maxlen wide
characters.
Returns
wcsnlen returns the length of s if it is less then maxlen,
or maxlen if there is no L'\0' wide character in first maxlen
characters.
Portability
wcsnlen is a GNU extension.
wcsnlen requires no supporting OS subroutines.