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