System.Xml.DtdParser.ScanAttlist6 C# (CSharp) Méthode

        private Token ScanAttlist6()
        {
            for (;;)
            {
                switch (_chars[_curPos])
                {
                    case '"':
                    case '\'':
                        ScanLiteral(LiteralType.AttributeValue);
                        _scanningFunction = ScanningFunction.Attlist1;
                        return Token.Literal;
                    case '#':
                        if (_charsUsed - _curPos < 6)
                            goto ReadData;
                        switch (_chars[_curPos + 1])
                        {
                            case 'R':
                                if (_charsUsed - _curPos < 9)
                                    goto ReadData;
                                if (_chars[_curPos + 2] != 'E' || _chars[_curPos + 3] != 'Q' ||
                                     _chars[_curPos + 4] != 'U' || _chars[_curPos + 5] != 'I' ||
                                     _chars[_curPos + 6] != 'R' || _chars[_curPos + 7] != 'E' ||
                                     _chars[_curPos + 8] != 'D')
                                {
                                    Throw(_curPos, SR.Xml_ExpectAttType);
                                }
                                _curPos += 9;
                                _scanningFunction = ScanningFunction.Attlist1;
                                return Token.REQUIRED;
                            case 'I':
                                if (_charsUsed - _curPos < 8)
                                    goto ReadData;
                                if (_chars[_curPos + 2] != 'M' || _chars[_curPos + 3] != 'P' ||
                                     _chars[_curPos + 4] != 'L' || _chars[_curPos + 5] != 'I' ||
                                     _chars[_curPos + 6] != 'E' || _chars[_curPos + 7] != 'D')
                                {
                                    Throw(_curPos, SR.Xml_ExpectAttType);
                                }
                                _curPos += 8;
                                _scanningFunction = ScanningFunction.Attlist1;
                                return Token.IMPLIED;
                            case 'F':
                                if (_chars[_curPos + 2] != 'I' || _chars[_curPos + 3] != 'X' ||
                                     _chars[_curPos + 4] != 'E' || _chars[_curPos + 5] != 'D')
                                {
                                    Throw(_curPos, SR.Xml_ExpectAttType);
                                }
                                _curPos += 6;
                                _scanningFunction = ScanningFunction.Attlist7;
                                return Token.FIXED;
                            default:
                                Throw(_curPos, SR.Xml_ExpectAttType);
                                break;
                        }
                        break;
                    default:
                        Throw(_curPos, SR.Xml_ExpectAttType);
                        break;
                }
            ReadData:
                if (ReadData() == 0)
                {
                    Throw(_curPos, SR.Xml_IncompleteDtdContent);
                }
            }
        }