How to use datatable with date range search and the default search capability ?

encryptoferia

I've looked around and found ways to override search function to enable date range filter feature, but I still need the default search provided by Datatable. So I started to look for the original search function but I only found these,

    function _fnFilterCreateSearch( search, regex, smart, caseInsensitive )
        {
            search = regex ?
                search :
                _fnEscapeRegex( search );

            if ( smart ) {
                /* For smart filtering we want to allow the search to work regardless of
                 * word order. We also want double quoted text to be preserved, so word
                 * order is important - a la google. So this is what we want to
                 * generate:
                 * 
                 * ^(?=.*?\bone\b)(?=.*?\btwo three\b)(?=.*?\bfour\b).*$
                 */
                var a = $.map( search.match( /"[^"]+"|[^ ]+/g ) || [''], function ( word ) {
                    if ( word.charAt(0) === '"' ) {
                        var m = word.match( /^"(.*)"$/ );
                        word = m ? m[1] : word;
                    }

                    return word.replace('"', '');
                } );

                search = '^(?=.*?'+a.join( ')(?=.*?' )+').*$';
            }

            return new RegExp( search, caseInsensitive ? 'i' : '' );
        }

But I guess it's not the default one, can anyone point me to the right function, OR is there a better way to combine the search capability without overriding the functions?

Thanks before.