00000180  32 7c b3 64 2f 1c 90 bc  ea 68 23 10 7e fe e3 25  |2|.d/....h#.~..%|
00000190  c0 48 3a 69 e0 28 6d d3  37 00 ef 04 62 dd 0d a0  |.H:i.(m.7...b...|
000001a0  9c 70 62 83 d8 81 d3 64  31 aa 9e 97 31 bd 96 b0  |.pb....d1...1...|
000001b0  68 c0 9b 23 de 76 64 3f  1a 5c 7f e9 12 0e 58 58  |h..#.vd?.\....XX|
000001c0  b6 5f 70 dd 9b d8 ea d5  d7 f5 d5 cc b9 b6 9f 30  |._p............0|

00000040  b5 b3 1e 0f 2f a3 c5 e8  67 65 04 bc 37 97 15 a8  |..../...ge..7...|
00000050  a8 f3 a8 79 99 82 e1 10  5d d7 f2 ee 21 46 aa b8  |...y....]...!F..|
00000060  40 9f 3b fc 12 19 c8 82  b4 8e bc b8 9b a9 f6 aa  |@.;.............|
00000070  18 6b 48 4e 03 92 43 12  b8 54 f2 b7 29 0b 0a a1  |.kHN..C..T..)...|
00000080  6f c4 1c 2a af 22 c1 3d  1b 43 a5 3c 7d 39 83 5d  |o..*.".=.C.<}9.]|

		t.Fatal(err)
	}

	aa := NewFile(uintptr(afd), a.Name())
	defer aa.Close()
	bb := NewFile(uintptr(bfd), b.Name())
	defer bb.Close()

	// This would fail on Linux in case the copy_file_range syscall was used because it doesn't
	// support destination files opened with O_APPEND, see
	// https://man7.org/linux/man-pages/man2/copy_file_range.2.html#ERRORS
	_, err = io.Copy(aa, bb)
	if err != nil {
		t.Fatal(err)

		if w == 0 {
			panic("zero width in string")
		}
		if r != chars[j] {
			panic("wrong value from string")
		}
		j++
	}
	// encoded as bytes:  'a' 'b' 'c' e6 97 a5 e6 9c ac e8 aa 9e
	const L = 12
	if L != l {
		panic("wrong length constructing array")
	}
	a := make([]byte, L)
	a[0] = 'a'
	a[1] = 'b'
	a[2] = 'c'
	a[3] = 0xe6
	a[4] = 0x97
	a[5] = 0xa5
	a[6] = 0xe6

00000010  bf 74 92 06 39 a6 9a 9b  80 71 7e 57 63 ab 31 74  |.t..9....q~Wc.1t|
00000020  d3 22 c1 e3 a6 c6 cf 6f  47 57 49 20 86 52 fb 0a  |.".....oGWI .R..|
00000030  fd aa 10 47 00 9a 5d ad  4c d8 90 f1 cf 13 10 73  |...G..].L......s|
00000040  31 f1 df 22 f3 42 58 b0  10 25 43 eb cc a8 00 01  |1..".BX..%C.....|
00000050  7e 00 12 01 69 01 67 00  75 00 a4 b9 09 90 b4 18  |~...i.g.u.......|

000000f0  bb 29 07 30 ff f6 84 af  c4 cf c2 ed 90 99 5f 58  |.).0.........._X|
00000100  cb 3b 74                                          |.;t|
>>> Flow 2 (server to client)
00000000  16 03 03 00 7a 02 00 00  76 03 03 b2 4d aa 76 5b  |....z...v...M.v[|
00000010  b7 38 95 18 e6 81 66 f8  27 82 26 2c b3 44 50 b0  |.8....f.'.&,.DP.|
00000020  f4 a8 f5 f2 87 f0 9d 85  4f ac 60 20 00 00 00 00  |........O.` ....|

		inferTypesForCmp(&a, &b)

		if a.Equals(b) {
			return true
		}

		// If elements, compare each.
		aA, aOK := a.ToArray()
		bA, bOK := b.ToArray()
		if aOK && bOK {
			if len(aA) != len(bA) {
				return false
			}
			for i := range aA {
				if !cmp(aA[i], bA[i]) {
					return false
				}
			}
			return true
		}
		// Try as numbers
		aF, aOK := a.ToFloat()

	for i := 0; i <= len(p)-BlockSize; i += BlockSize {
		// eliminate bounds checks on p
		q := p[i:]
		q = q[:BlockSize:BlockSize]

		// save current state
		aa, bb, cc, dd := a, b, c, d

		// load input block
		{{range $i := seq 16 -}}
			{{printf "x%x := byteorder.LeUint32(q[4*%#x:])" $i $i}}
		{{end}}

		// round 1
		{{range $i, $s := dup 4 .Shift1 -}}

		{"\n", -1},
		{"AAA=\n", -1},
		{"AAAA\n", -1},
		{"!!!!", 0},
		{"====", 0},
		{"x===", 1},
		{"=AAA", 0},
		{"A=AA", 1},
		{"AA=A", 2},
		{"AA==A", 4},
		{"AAA=AAAA", 4},
		{"AAAAA", 4},
		{"AAAAAA", 4},
		{"A=", 1},
		{"A==", 1},
		{"AA=", 3},
		{"AA==", -1},
		{"AAA=", -1},
		{"AAAA", -1},
		{"AAAAAA=", 7},
		{"YWJjZA=====", 8},
		{"A!\n", 1},
		{"A=\n", 1},
	}

-;-;-;-
0-3 0-3;0-3 0-3;0-3 0-3;0-3 0-3
"(?:(foo|fo))$"
-;-;-;-
0-3 0-3;0-3 0-3;0-3 0-3;0-3 0-3
strings
""
"aA"
regexps
"aa"
-;-;-;-
-;-;-;-
"^(?:aa)$"
-;-;-;-
-;-;-;-
"^(?:aa)"
-;-;-;-
-;-;-;-
"(?:aa)$"
-;-;-;-
-;-;-;-
strings
""
"Aa"
regexps
"a"
-;-;-;-
-;1-2;-;1-2
"^(?:a)$"
-;-;-;-
-;-;-;-
"^(?:a)"
-;-;-;-
-;-;-;-