if len(b) < len(magic32) || string(b[:len(magic32)]) != magic32 {
		return errors.New("hash/fnv: invalid hash state identifier")
	}
	if len(b) != marshaledSize32 {
		return errors.New("hash/fnv: invalid hash state size")
	}
	*s = sum32(byteorder.BeUint32(b[4:]))
	return nil
}

func (s *sum32a) UnmarshalBinary(b []byte) error {
	if len(b) < len(magic32a) || string(b[:len(magic32a)]) != magic32a {

		// must be converted to little endian first though.
		var buf [4]byte
		binary.BigEndian.PutUint32(buf[:], ff.Magic)
		leMagic := binary.LittleEndian.Uint32(buf[:])
		if leMagic == Magic32 || leMagic == Magic64 {
			return nil, ErrNotFat
		} else {
			return nil, &FormatError{0, "invalid magic number", nil}
		}
	}
	offset := int64(4)

			}
		}
	}
}
func testMagicExhaustiveU(t *testing.T, n uint) {
	max := uint64(1) << n
	for c := uint64(1); c < max; c++ {
		if !umagicOK(n, int64(c)) {
			continue
		}
		m := umagic(n, int64(c)).m
		s := umagic(n, int64(c)).s
		for i := uint64(0); i < max; i++ {
			want := i / c
			got := (i * (max + m)) >> (n + uint(s))
			if want != got {

	Magic  uint32
	Cpu    Cpu
	SubCpu uint32
	Type   Type
	Ncmd   uint32
	Cmdsz  uint32
	Flags  uint32
}

const (
	fileHeaderSize32 = 7 * 4
	fileHeaderSize64 = 8 * 4
)

const (
	Magic32  uint32 = 0xfeedface
	Magic64  uint32 = 0xfeedfacf
	MagicFat uint32 = 0xcafebabe
)

// A Type is the Mach-O file type, e.g. an object file, executable, or dynamic library.
type Type uint32

const (