var buf []byte
	var directoryEndOffset int64
	for i, bLen := range []int64{1024, 65 * 1024} {
		if bLen > size {
			bLen = size
		}
		buf = make([]byte, int(bLen))
		if _, err := r.ReadAt(buf, size-bLen); err != nil && err != io.EOF {
			return nil, 0, err
		}
		if p := findSignatureInBlock(buf); p >= 0 {
			buf = buf[p:]
			directoryEndOffset = size - bLen + int64(p)
			break
		}
		if i == 1 || bLen == size {

	in, out string
}

var TitleTests = []TitleTest{
	{"", ""},
	{"a", "A"},
	{" aaa aaa aaa ", " Aaa Aaa Aaa "},
	{" Aaa Aaa Aaa ", " Aaa Aaa Aaa "},
	{"123a456", "123a456"},
	{"double-blind", "Double-Blind"},
	{"ÿøû", "Ÿøû"},
	{"with_underscore", "With_underscore"},
	{"unicode \xe2\x80\xa8 line separator", "Unicode \xe2\x80\xa8 Line Separator"},
}

func TestTitle(t *testing.T) {

	BLENDPS $7, (BX), X2                    // 660f3a0c1307
	BLENDPS $7, (R11), X2                   // 66410f3a0c1307
	BLENDPS $7, X2, X2                      // 660f3a0cd207
	BLENDPS $7, X11, X2                     // 66410f3a0cd307
	BLENDPS $7, (BX), X11                   // 66440f3a0c1b07
	BLENDPS $7, (R11), X11                  // 66450f3a0c1b07

	VMOVW	W16, 64(R20)   // 7810a426
	VMOVW	W24, -104(R17) // 7be68e26
	VMOVD	W2, (R3)       // 780018a7
	VMOVD	W19, 128(R23)  // 7810bce7
	VMOVD	W0, -256(R31)  // 7be0f827
	RET

// END
//
//	LEND	comma // asm doesn't support the trailing comma.
//	{
//		outcode(int($1), &nullgen, 0, &nullgen);
//	}

	WSBH	R1, R2 // 7c0110a0

	SEB	R1, R2 // 7c011420
	SEH	R1, R2 // 7c011620

	// to (Hi, Lo)
	MADD	R2, R1 // 70220000
	MSUB	R2, R1 // 70220004
	MUL	R2, R1 // 00220018

	// END
	//
	//	LEND	comma // asm doesn't support the trailing comma.
	//	{
	//		outcode(int($1), &nullgen, 0, &nullgen);
	//	}