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)
		check(t, "TestBasicOperations (7)", &buf, testString[0:26])

		buf.Truncate(20)
		check(t, "TestBasicOperations (8)", &buf, testString[0:20])

			r:            strings.NewReader("abcdefghijklmnopqrstuvwxyz"),
			n:            26,
			want:         26,
			wantBuffered: 0,
		},
		{
			name:         "discard more than end",
			r:            strings.NewReader("abcdefghijklmnopqrstuvwxyz"),
			n:            27,
			want:         26,
			wantErr:      io.EOF,
			wantBuffered: 0,
		},

		t.Errorf("unexpected method and flags: %v", b[6:10])
	}

	if !bytes.Equal(b[14:26], make([]byte, 12)) { // FileHeader.{CRC32,CompressSize,UncompressedSize} all zero.
		t.Errorf("unexpected crc, compress and uncompressed size to be 0 was: %v", b[14:26])
	}

	binary.LittleEndian.PutUint32(sig[:], uint32(dataDescriptorSignature))
	if bytes.Contains(b, sig[:]) {

	// Output:
	// 8
	// 9
	// -1
}

func ExampleMap() {
	rot13 := func(r rune) rune {
		switch {
		case r >= 'A' && r <= 'Z':
			return 'A' + (r-'A'+13)%26
		case r >= 'a' && r <= 'z':
			return 'a' + (r-'a'+13)%26
		}
		return r
	}
	fmt.Printf("%s\n", bytes.Map(rot13, []byte("'Twas brillig and the slithy gopher...")))
	// Output:
	// 'Gjnf oevyyvt naq gur fyvgul tbcure...
}

	//TODO VFCVTXN2 V0.D2, V21.S4              // 1568616e
	//TODO FCVTZS $26, F29, F19                // b3ff665f
	//TODO VFCVTZS $45, V14.D2, V18.D2         // d2fd534f
	//TODO FCVTZS F8, F7                       // 07b9a15e
	//TODO VFCVTZS V2.S2, V4.S2                // 44b8a10e
	//TODO FCVTZS $26, F7, R11                 // eb98181e
	//TODO FCVTZS $7, F4, ZR                   // 9fe4189e

// our zip performance, since the test above disabled CRC32 and flate.
func BenchmarkZip64Test(b *testing.B) {
	for i := 0; i < b.N; i++ {
		testZip64(b, 1<<26)
	}
}

func BenchmarkZip64TestSizes(b *testing.B) {
	for _, size := range []int64{1 << 12, 1 << 20, 1 << 26} {
		b.Run(fmt.Sprint(size), func(b *testing.B) {
			b.RunParallel(func(pb *testing.PB) {
				for pb.Next() {
					testZip64(b, size)
				}
			})

pkg syscall (freebsd-386), const AF_E164 = 26
pkg syscall (freebsd-386), const AF_ECMA = 8
pkg syscall (freebsd-386), const AF_HYLINK = 15
pkg syscall (freebsd-386), const AF_IEEE80211 = 37
pkg syscall (freebsd-386), const AF_IMPLINK = 3
pkg syscall (freebsd-386), const AF_INET6 = 28
pkg syscall (freebsd-386), const AF_IPX = 23
pkg syscall (freebsd-386), const AF_ISDN = 26
pkg syscall (freebsd-386), const AF_ISO = 7

0000320 bb fc 6c d6 99 23 eb 36 ad c6 c5 e1 d8 e1 e2 3e
0000330 d9 90 5a f7 91 5d 6f bc 33 6d 98 47 d2 7c 2e 2f
0000340 99 a4 25 72 85 49 2c be 0b 5b af 8f e5 6e 81 a6
0000350 a3 5a 6f 39 53 3a ab 7a 8b 1e 26 f7 46 6c 7d 26
0000360 53 b3 22 31 94 d3 83 f2 18 4d f5 92 33 27 53 97
0000370 0f d3 e6 55 9c a6 c5 31 87 6f d3 f3 ae 39 6f 56
0000380 10 7b ab 7e d0 b4 ca f2 b8 05 be 3f 0e 6e 5a 75

pkg syscall (darwin-arm64), const CSTOP ideal-int
pkg syscall (darwin-arm64), const CSTOPB = 1024
pkg syscall (darwin-arm64), const CSTOPB ideal-int
pkg syscall (darwin-arm64), const CSUSP = 26
pkg syscall (darwin-arm64), const CSUSP ideal-int
pkg syscall (darwin-arm64), const CTL_MAXNAME = 12
pkg syscall (darwin-arm64), const CTL_MAXNAME ideal-int
pkg syscall (darwin-arm64), const CTL_NET = 4

		"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",