pollution: n
int swprintf(wchar_t * restrict, size_t n, const wchar_t * restrict, ...); 

pollution: n
int vswprintf(wchar_t * restrict, size_t n, const wchar_t * restrict, __va_list); 

pollution: n
int wcsncasecmp(const wchar_t *, const wchar_t *, size_t n);