code: private boolean isQuote(final char[] srcChars, final int pos, final int len, final int quoteStart, final int quoteLen) {
          for (int i = 0; i < quoteLen; i++) {
              if (pos + i >= len || srcChars[pos + i] != srcChars[quoteStart + i]) {
                  return false;
              }
          }
          return true;
      }
docs: Checks if the characters at the index specified match the quote
  already matched in readNextToken().
  
  @param srcChars  the character array being tokenized
  @param pos  the position to check for a quote
  @param len  the length of the character array being tokenized
  @param quoteStart  the start position of the matched quote, 0 if no quoting
  @param quoteLen  the length of the matched quote, 0 if no quoting
  @return true if a quote is matched