/*!
 * jquery.base64.js 0.1 - https://github.com/yckart/jquery.base64.js
 * base64 en & -decoding
 *
 * copyright (c) 2012 yannick albert (http://yckart.com)
 * licensed under the mit license (http://www.opensource.org/licenses/mit-license.php).
 * 2013/02/10
 **/
;(function($){
    $.base64 = $.fn.base64 = function (dir, input) {

        var publ = {},
            self = this,
            b64 = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789+/=";

        // http://phpjs.org/functions/base64_encode/
        publ.encode = function (data) {
            data = !(self instanceof $) ? data : self.is(':input') ? self.val() : self.text();
            data = unescape(encodeuricomponent( data ));

            if (data === '') return;
            var o1, o2, o3, h1, h2, h3, h4, bits, i = 0,
                ac = 0,
                enc = "",
                tmp_arr = [];

            if (!data) return data;

            do { // pack three octets into four hexets
                o1 = data.charcodeat(i++);
                o2 = data.charcodeat(i++);
                o3 = data.charcodeat(i++);

                bits = o1 << 16 | o2 << 8 | o3;

                h1 = bits >> 18 & 0x3f;
                h2 = bits >> 12 & 0x3f;
                h3 = bits >> 6 & 0x3f;
                h4 = bits & 0x3f;

                // use hexets to index into b64, and append result to encoded string
                tmp_arr[ac++] = b64.charat(h1) + b64.charat(h2) + b64.charat(h3) + b64.charat(h4);
            } while (i < data.length);

            enc = tmp_arr.join('');

            var r = data.length % 3;

            return (r ? enc.slice(0, r - 3) : enc) + '==='.slice(r || 3);
        };

        // http://phpjs.org/functions/base64_decode/
        publ.decode = function (data) {
            data = !(self instanceof $) ? data : self.is(':input') ? self.val() : self.text();

            var o1, o2, o3, h1, h2, h3, h4, bits, i = 0,
                ac = 0,
                dec = "",
                tmp_arr = [];

            if (!data) return data;

            data += '';

            do { // unpack four hexets into three octets using index points in b64
                h1 = b64.indexof(data.charat(i++));
                h2 = b64.indexof(data.charat(i++));
                h3 = b64.indexof(data.charat(i++));
                h4 = b64.indexof(data.charat(i++));

                bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;

                o1 = bits >> 16 & 0xff;
                o2 = bits >> 8 & 0xff;
                o3 = bits & 0xff;

                if (h3 == 64) {
                    tmp_arr[ac++] = string.fromcharcode(o1);
                } else if (h4 == 64) {
                    tmp_arr[ac++] = string.fromcharcode(o1, o2);
                } else {
                    tmp_arr[ac++] = string.fromcharcode(o1, o2, o3);
                }
            } while (i < data.length);

            dec = tmp_arr.join('');

            return decodeuricomponent(escape( dec ));
        };

        return input ? publ[dir](input) : dir ? null : publ;
    };
}(jquery));