}

// IndexAny returns the index of the first instance of any Unicode code point
// from chars in s, or -1 if no Unicode code point from chars is present in s.
func IndexAny(s, chars string) int {
	if chars == "" {
		// Avoid scanning all of s.
		return -1
	}
	if len(chars) == 1 {
		// Avoid scanning all of s.
		r := rune(chars[0])
		if r >= utf8.RuneSelf {
			r = utf8.RuneError
		}
		return IndexRune(s, r)
	}

	p.list = p.mergePlain(p.list)
	p.list = p.autoLinkText(p.list)

	return p.list
}

func (ps *parseState) emph(dst, src []Inline) []Inline {
	const chars = "_*~\"'"
	var stack [len(chars)][]*emphPlain
	stackOf := func(c byte) int {
		return strings.IndexByte(chars, c)
	}

	trimStack := func() {
		for i := range stack {
			stk := &stack[i]
			for len(*stk) > 0 && (*stk)[len(*stk)-1].i >= len(dst) {

func (t *TwoLines) Scan(state ScanState, verb rune) error {
	chars := make([]rune, 0, 100)
	for nlCount := 0; nlCount < 2; {
		c, _, err := state.ReadRune()
		if err != nil {
			return err
		}
		chars = append(chars, c)
		if c == '\n' {
			nlCount++
		}
	}
	*t = TwoLines(string(chars))
	return nil
}

func TestMultiLine(t *testing.T) {
	input := "abc\ndef\n"

	}
	defer RemoveAll(startPath)

	err = Chdir(startPath)
	if err != nil {
		t.Fatalf("Could not chdir %s: %s", startPath, err)
	}

	// Removing paths with over 4096 chars commonly fails
	for i := 0; i < 41; i++ {
		name := strings.Repeat("a", 100)

		err = Mkdir(name, 0755)
		if err != nil {
			t.Fatalf("Could not mkdir %s: %s", name, err)
		}

		err = Chdir(name)

	0x2f800,
	0x2fa1d,
}

var notletterTest = []rune{
	0x20,
	0x35,
	0x375,
	0x619,
	0x700,
	0x1885,
	0xfffe,
	0x1ffff,
	0x10ffff,
}

// Contains all the special cased Latin-1 chars.
var spaceTest = []rune{
	0x09,
	0x0a,
	0x0b,
	0x0c,
	0x0d,
	0x20,
	0x85,
	0xA0,
	0x2000,
	0x3000,
}

type caseT struct {
	cas     int
	in, out rune
}

		if err != nil {
			return err
		}
		defer c.Close()

		b := []byte(data)
		n, err := c.Write(b)
		if err != nil {
			return err
		}
		if n != len(b) {
			return fmt.Errorf(`Only %d chars of string "%s" sent`, n, data)
		}
		return nil
	}

	if envaddr := os.Getenv("GOTEST_DIAL_ADDR"); envaddr != "" {
		// In child process.
		c, err := Dial("tcp", envaddr)
		if err != nil {
			t.Fatal(err)

	if s == "" {
		return false
	}
	for _, c := range s {
		switch {
		case strings.ContainsRune("!#$%&()*+-./:;<=>?@[]^_{|}~ ", c):
			// Backslash and quote chars are reserved, but
			// otherwise any punctuation chars are allowed
			// in a tag name.
		case !unicode.IsLetter(c) && !unicode.IsDigit(c):
			return false
		}
	}
	return true
}

// unicode width of the text.
func (b *Writer) endEscape() {
	switch b.endChar {
	case Escape:
		b.updateWidth()
		if b.flags&StripEscape == 0 {
			b.cell.width -= 2 // don't count the Escape chars
		}
	case '>': // tag of zero width
	case ';':
		b.cell.width++ // entity, count as one rune
	}
	b.pos = len(b.buf)
	b.endChar = 0
}

// of an input buffer of length n.
func (enc *Encoding) EncodedLen(n int) int {
	if enc.padChar == NoPadding {
		return n/3*4 + (n%3*8+5)/6 // minimum # chars at 6 bits per char
	}
	return (n + 2) / 3 * 4 // minimum # 4-char quanta, 3 bytes each
}

/*
 * Decoder
 */

type CorruptInputError int64

func (e CorruptInputError) Error() string {

	// Re-using some addrParser methods which support obsolete text, i.e. non-printable ASCII
	p := addrParser{date, nil}
	p.skipSpace()

	// RFC 5322: zone = (FWS ( "+" / "-" ) 4DIGIT) / obs-zone
	// zone length is always 5 chars unless obsolete (obs-zone)
	if ind := strings.IndexAny(p.s, "+-"); ind != -1 && len(p.s) >= ind+5 {
		date = p.s[:ind+5]
		p.s = p.s[ind+5:]
	} else {
		ind := strings.Index(p.s, "T")
		if ind == 0 {