wcsnlen -- determine the length of a fixed-size wide-character string


#include <wchar.h>

size_t wcsnlen(const wchar_t * s, size_t maxlen);


wcsnlen() is the wide-character equivalent of strnlen(). It returns the number of wide-characters in the string s, not including the terminating null wide character code, but at most maxlen. In doing this, wcsnlen() looks only at the first maxlen wide-characters at s and never beyond s + maxlen.

Return Value

wcsnlen() returns wcslen()(s) if that is less than maxlen, or maxlen if there is no null wide character code among the first maxlen wide characters pointed to by s.