// Read the sparse map according to the appropriate format.
	if is1x0 {
		return readGNUSparseMap1x0(tr.curr)
	}
	return readGNUSparseMap0x1(hdr.PAXRecords)
}

// mergePAX merges paxHdrs into hdr for all relevant fields of Header.
func mergePAX(hdr *Header, paxHdrs map[string]string) (err error) {
	for k, v := range paxHdrs {
		if v == "" {
			continue // Keep the original USTAR value
		}
		var id64 int64

			},
		},
		ok: true,
	}}

	for i, v := range vectors {
		got := new(Header)
		err := mergePAX(got, v.in)
		if v.ok && !reflect.DeepEqual(*got, *v.want) {
			t.Errorf("test %d, mergePAX(...):\ngot  %+v\nwant %+v", i, *got, *v.want)
		}
		if ok := err == nil; ok != v.ok {
			t.Errorf("test %d, mergePAX(...): got %v, want %v", i, ok, v.ok)
		}
	}
}

func TestParsePAX(t *testing.T) {