type sparseArray []byte

func (s sparseArray) entry(i int) sparseElem { return sparseElem(s[i*24:]) }
func (s sparseArray) isExtended() []byte     { return s[24*s.maxEntries():][:1] }
func (s sparseArray) maxEntries() int        { return len(s) / 24 }

type sparseElem []byte

func (s sparseElem) offset() []byte { return s[00:][:12] }

	{"$16", "$16"},
	{"-16(RSP)", "-16(RSP)"},
	{"16(RSP)", "16(RSP)"},
	{"1(R1)", "1(R1)"},
	{"-1(R4)", "-1(R4)"},
	{"18740(R5)", "18740(R5)"},
	{"$2", "$2"},
	{"$-24(R4)", "$-24(R4)"},
	{"-24(RSP)", "-24(RSP)"},
	{"$24(RSP)", "$24(RSP)"},
	{"-32(RSP)", "-32(RSP)"},
	{"$48", "$48"},
	{"$(-64*1024)(R7)", "$-65536(R7)"},
	{"$(8-1)", "$7"},
	{"a+0(FP)", "a(FP)"},
	{"a1+8(FP)", "a1+8(FP)"},

	directoryEndLen          = 22         // + comment
	dataDescriptorLen        = 16         // four uint32: descriptor signature, crc32, compressed size, size
	dataDescriptor64Len      = 24         // two uint32: signature, crc32 | two uint64: compressed size, size
	directory64LocLen        = 20         //
	directory64EndLen        = 56         // + extra

	// Constants for the first byte in CreatorVersion.

				attrTag := fieldBuf.uint16()
				attrSize := int(fieldBuf.uint16())
				if len(fieldBuf) < attrSize {
					continue parseExtras
				}
				attrBuf := fieldBuf.sub(attrSize)
				if attrTag != 1 || attrSize != 24 {
					continue // Ignore irrelevant attributes
				}

				const ticksPerSecond = 1e7    // Windows timestamp resolution
				ts := int64(attrBuf.uint64()) // ModTime since Windows epoch
				secs := ts / ticksPerSecond

		t.Fatal(err)
	}
}

func TestHeaderIgnoredSize(t *testing.T) {
	h := FileHeader{
		Name:   "foo.txt",
		Method: Deflate,
		Extra:  []byte{zip64ExtraID & 0xFF, zip64ExtraID >> 8, 24, 0, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8}, // bad size but shouldn't be consulted
	}
	testValidHeader(&h, t)
}

			minor |= uint32((dev & 0x00000ffffff00000) >> 12)
			h.Devmajor, h.Devminor = int64(major), int64(minor)
		case "darwin", "ios":
			// Copied from golang.org/x/sys/unix/dev_darwin.go.
			major := uint32((dev >> 24) & 0xff)
			minor := uint32(dev & 0xffffff)
			h.Devmajor, h.Devminor = int64(major), int64(minor)
		case "dragonfly":
			// Copied from golang.org/x/sys/unix/dev_dragonfly.go.
			major := uint32((dev >> 8) & 0xff)

	op1 := int64(0)
	if op == arm.AMRC {
		op1 = 1
	}
	bits, ok := ParseARMCondition(cond)
	if !ok {
		return
	}
	offset = (0xe << 24) | // opcode
		(op1 << 20) | // MCR/MRC
		((int64(bits) ^ arm.C_SCOND_XOR) << 28) | // scond
		((x0 & 15) << 8) | //coprocessor number
		((x1 & 7) << 21) | // coprocessor operation
		((x2 & 15) << 12) | // ARM register

			},
		},
	},
	{
		Name:   "r.zip",
		Source: returnRecursiveZip,
		File: []ZipTestFile{
			{
				Name:     "r/r.zip",
				Content:  rZipBytes(),
				Modified: time.Date(2010, 3, 4, 0, 24, 16, 0, time.UTC),
				Mode:     0666,
			},
		},
	},
	{
		Name: "symlink.zip",
		File: []ZipTestFile{
			{
				Name:     "symlink",
				Content:  []byte("../target"),

		}
		check(t, "TestBasicOperations (4)", &buf, "a")

		buf.WriteByte(testString[1])
		check(t, "TestBasicOperations (5)", &buf, "ab")

		n, err = buf.Write(testBytes[2:26])
		if want := 24; err != nil || n != want {
			t.Errorf("Write: got (%d, %v), want (%d, %v)", n, err, want, nil)
		}
		check(t, "TestBasicOperations (6)", &buf, testString[0:26])

		buf.Truncate(26)

		"0/1/2/3/4/5/6/7/8/9/10/11/12/13/14/15/16/17/18/19/20/21/22/23/24/25/26/27/28/29/30/file.txt",
		"0/1/2/3/4/5/6/7/8/9/10/11/12/13/14/15/16/17/18/19/20/21/22/23/24/25/26/27/28/29/30/31/32/33/file.txt",
		"0/1/2/3/4/5/6/7/8/9/10/11/12/13/14/15/16/17/18/19/20/21/22/23/24/25/26/27/28/29/30/31/32/333/file.txt",
		"0/1/2/3/4/5/6/7/8/9/10/11/12/13/14/15/16/17/18/19/20/21/22/23/24/25/26/27/28/29/30/31/32/33/34/35/36/37/38/39/40/file.txt",