class REXML::Parsers::BaseParser

def parse_attributes(prefixes)
  attributes = {}
  expanded_names = {}
  closed = false
  while true
    if @source.match?(">", true)
      return attributes, closed
    elsif @source.match?("/>", true)
      closed = true
      return attributes, closed
    elsif match = @source.match(QNAME, true)
      name = match[1]
      prefix = match[2]
      local_part = match[3]
      unless @source.match?(/\s*=\s*/um, true)
        message = "Missing attribute equal: <#{name}>"
        raise REXML::ParseException.new(message, @source)
      end
      unless quote = scan_quote
        message = "Missing attribute value start quote: <#{name}>"
        raise REXML::ParseException.new(message, @source)
      end
      start_position = @source.position
      value = @source.read_until(quote)
      unless value.chomp!(quote)
        @source.position = start_position
        message = "Missing attribute value end quote: <#{name}>: <#{quote}>"
        raise REXML::ParseException.new(message, @source)
      end
      @source.match?(/\s*/um, true)
      if prefix == "xmlns"
        if local_part == "xml"
          if value != Private::XML_PREFIXED_NAMESPACE
            msg = "The 'xml' prefix must not be bound to any other namespace "+
              "(http://www.w3.org/TR/REC-xml-names/#ns-decl)"
            raise REXML::ParseException.new( msg, @source, self )
          end
        elsif local_part == "xmlns"
          msg = "The 'xmlns' prefix must not be declared "+
            "(http://www.w3.org/TR/REC-xml-names/#ns-decl)"
          raise REXML::ParseException.new( msg, @source, self)
        end
        add_namespace(local_part, value)
      elsif prefix
        prefixes << prefix unless prefix == "xml"
      end
      if attributes[name]
        msg = "Duplicate attribute #{name.inspect}"
        raise REXML::ParseException.new(msg, @source, self)
      end
      unless prefix == "xmlns"
        uri = @namespaces[prefix]
        expanded_name = [uri, local_part]
        existing_prefix = expanded_names[expanded_name]
        if existing_prefix
          message = "Namespace conflict in adding attribute " +
                    "\"#{local_part}\": " +
                    "Prefix \"#{existing_prefix}\" = \"#{uri}\" and " +
                    "prefix \"#{prefix}\" = \"#{uri}\""
          raise REXML::ParseException.new(message, @source, self)
        end
        expanded_names[expanded_name] = prefix
      end
      attributes[name] = value
    else
      message = "Invalid attribute name: <#{@source.buffer.split(%r{[/>\s]}).first}>"
      raise REXML::ParseException.new(message, @source)
    end
  end
end