1#include <wchar.h> 2 3wchar_t *wcsncpy(wchar_t *restrict d, const wchar_t *restrict s, size_t n) 4{ 5 wchar_t *a = d; 6 while (n && *s) n--, *d++ = *s++; 7 wmemset(d, 0, n); 8 return a; 9} 10