fusl/src/string/wcsncpy.c

#include <wchar.h>

wchar_t* wcsncpy(wchar_t* restrict d, const wchar_t* restrict s, size_t n) {
  wchar_t* a = d;
  while (n && *s)
    n--, *d++ = *s++;
  wmemset(d, 0, n);
  return a;
}