function inputLength(input) {
        var text = input.val();

        if (options.twoCharLinebreak) {
          // Count all line breaks as 2 characters
          text = text.replace(/\r(?!\n)|\n(?!\r)/g, '\r\n');
        } else {
          // Remove all double-character (\r\n) linebreaks, so they're counted only once.
          text = text.replace(new RegExp('\r?\n', 'g'), '\n');
        }

        var currentLength = 0;

        if (options.utf8) {
          currentLength = utf8Length(text);
        } else {
          currentLength = text.length;
        }
        return currentLength;
      }
Return the length of the specified input.

@param input
@return {number}