Method tokenize

app/src/main/java/com/sun/mail/smtp/DigestMD5.java:169–211

Tokenize a response from the server. @return Map containing key/value pairs from server

(String serverResponse)

     * @return	Map containing key/value pairs from server
     */
    @SuppressWarnings("fallthrough")
    private Map<String, String> tokenize(String serverResponse)
	    throws IOException {
	Map<String, String> map	= new HashMap<>();
	byte[] bytes = serverResponse.getBytes("iso-8859-1");	// really ASCII?
	String key = null;
	int ttype;
	StreamTokenizer	tokens
		= new StreamTokenizer(
		    new InputStreamReader(
		      new BASE64DecoderStream(
			new ByteArrayInputStream(bytes, 4, bytes.length - 4)
		      ), "iso-8859-1"	// really ASCII?
		    )
		  );

	tokens.ordinaryChars('0', '9');	// reset digits
	tokens.wordChars('0', '9');	// digits may start words
	while ((ttype = tokens.nextToken()) != StreamTokenizer.TT_EOF) {
	    switch (ttype) {
	    case StreamTokenizer.TT_WORD:
		if (key == null) {
		    key = tokens.sval;
		    break;
		}
		// fall-thru
	    case '"':
		if (logger.isLoggable(Level.FINE))
		    logger.fine("Received => " +
			 	 key + "='" + tokens.sval + "'");
		if (map.containsKey(key)) {  // concatenate multiple values
		    map.put(key, map.get(key) + "," + tokens.sval);
		} else {
		    map.put(key, tokens.sval);
		}
		key = null;
		break;
	    default:	// XXX - should never happen?
		break;
	    }
	}
	return map;
    }

    private static char[] digits = {
	'0', '1', '2', '3', '4', '5', '6', '7',