1 #include <wchar.h>
2 
wcsncat(wchar_t * restrict d,const wchar_t * restrict s,size_t n)3 wchar_t* wcsncat(wchar_t* restrict d, const wchar_t* restrict s, size_t n) {
4     wchar_t* a = d;
5     d += wcslen(d);
6     while (n && *s)
7         n--, *d++ = *s++;
8     *d++ = 0;
9     return a;
10 }
11