checkNotNull(toIgnore);
    return new Reader() {
      @Override
      public int read() throws IOException {
        int readChar;
        do {
          readChar = delegate.read();
        } while (readChar != -1 && toIgnore.indexOf((char) readChar) >= 0);
        return readChar;
      }

      @Override
      public int read(char[] cbuf, int off, int len) throws IOException {

      try {
        return input.readUnsignedShort();
      } catch (IOException e) {
        throw new IllegalStateException(e);
      }
    }

    @Override
    public char readChar() {
      try {
        return input.readChar();
      } catch (IOException e) {
        throw new IllegalStateException(e);
      }
    }

    @Override
    public int readInt() {
      try {