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