private char isQuote(int index){
  if (index >= input.length()) {
    return 0;
  }
  char c=input.charAt(index);
  for (int i=0; i < quoteChars.length; i++) {
    if (c == quoteChars[i]) {
      return c;
    }
  }
  return 0;
}

private char isQuote ( int index ) { if ( index >= input . length ( ) ) { return 0 ; } char c = input . charAt ( index ) ; for ( int i = 0 ; i < quoteChars . length ; i ++ ) { if ( c == quoteChars [ i ] ) { return c ; } } return 0 ; }
detect quote characters . todo : support more than one quote character , make sure opening and closing quotes match then .
