wcscspn
extern size_t wcscspn(const wchar_t *wcs, const wchar_t *reject);
B_DEFINE_WEAK_ALIAS(__wcscspn, wcscspn);
size_t result = wcscspn(string, reject);
size_t result = wcscspn(string, reject);
size_t result = wcscspn(string, reject);
size_t result = wcscspn(string, reject);
size_t result = wcscspn(string, reject);
size_t result = wcscspn(string, reject);