wcsdup
wchar_t *wcsdup(const wchar_t *) __malloc_like;
if ((tr = wcsdup(t)) == NULL) {
if ((tr = wcsdup(t)) == NULL) {
if ((tr2 = wcsdup(w2)) == NULL)
if ((tr1 = wcsdup(w1)) == NULL)
if ((ws = wcsdup(L"")) == NULL) {
if ((ret = wcsdup(skip(buf))) == NULL)