func C.GoBytes(unsafe.Pointer, C.int) []byte

As a special case, C.malloc does not call the C library malloc directly
but instead calls a Go helper function that wraps the C library malloc
but guarantees never to return nil. If C's malloc indicates out of memory,
the helper function crashes the program, like when Go itself runs out
of memory. Because C.malloc cannot fail, it has no two-result form
that returns errno.

		{"9 foo=ba\n", "", "foo", "ba", true},
		{"11 foo=bar\n\x00", "\x00", "foo", "bar", true},
		{"18 foo=b=\nar=\n==\x00\n", "", "foo", "b=\nar=\n==\x00", true},
		{"27 foo=hello9 foo=ba\nworld\n", "", "foo", "hello9 foo=ba\nworld", true},
		{"27 ☺☻☹=日a本b語ç\nmeow mix", "meow mix", "☺☻☹", "日a本b語ç", true},
		{"17 \x00hello=\x00world\n", "17 \x00hello=\x00world\n", "", "", false},
		{"1 k=1\n", "1 k=1\n", "", "", false},

	if goname == "errno" {
		error_(sel.Pos(), "cannot refer to errno directly; see documentation")
		return
	}
	if goname == "_CMalloc" {
		error_(sel.Pos(), "cannot refer to C._CMalloc; use C.malloc")
		return
	}
	if goname == "malloc" {
		goname = "_CMalloc"
	}
	name := f.Name[goname]
	if name == nil {
		name = &Name{
			Go: goname,
		}
		f.Name[goname] = name
		f.NamePos[name] = sel.Pos()
	}

	delim    byte
	expected []string
	err      error
}{
	{"", 0, []string{""}, io.EOF},
	{"a\x00", 0, []string{"a\x00"}, nil},
	{"abbbaaaba", 'b', []string{"ab", "b", "b", "aaab"}, nil},
	{"hello\x01world", 1, []string{"hello\x01"}, nil},
	{"foo\nbar", 0, []string{"foo\nbar"}, io.EOF},
	{"alpha\nbeta\ngamma\n", '\n', []string{"alpha\n", "beta\n", "gamma\n"}, nil},

		nonUTF8 bool
		flags   uint16
	}{
		{
			name:    "hi, hello",
			comment: "in the world",
			flags:   0x8,
		},
		{
			name:    "hi, こんにちわ",
			comment: "in the world",
			flags:   0x808,
		},
		{
			name:    "hi, こんにちわ",
			comment: "in the world",
			nonUTF8: true,
			flags:   0x8,
		},
		{
			name:    "hi, hello",
			comment: "in the 世界",
			flags:   0x808,
		},
		{

			testRemaining{1, 1},
		},
	}, {
		maker: makeReg{"hello", 5},
		tests: []testFnc{
			testRemaining{5, 5},
			testRead{5, "hello", io.EOF},
			testRemaining{0, 0},
		},
	}, {
		maker: makeReg{"hello, world", 50},
		tests: []testFnc{
			testRemaining{50, 50},
			testRead{7, "hello, ", nil},
			testRemaining{43, 43},
			testRead{5, "world", nil},

	b = bytes.TrimPrefix(b, []byte("Goodbye,"))
	b = bytes.TrimPrefix(b, []byte("See ya,"))
	fmt.Printf("Hello%s", b)
	// Output: Hello, world!
}

func ExampleTrimSpace() {
	fmt.Printf("%s", bytes.TrimSpace([]byte(" \t\n a lone gopher \n\t\r\n")))
	// Output: a lone gopher
}

func ExampleTrimSuffix() {
	var b = []byte("Hello, goodbye, etc!")
	b = bytes.TrimSuffix(b, []byte("goodbye, etc!"))