/**
 * jQuery BASE64 functions
 * 
 * @alias Muhammad Hussein Fattahizadeh < muhammad [AT] semnanweb [DOT] com >
 * @link http://www.semnanweb.com/jquery-plugin/base64.html
 * @see http://www.webtoolkit.info/
 * @license http://www.gnu.org/licenses/gpl.html [GNU General Public License]
 * @param {jQuery} {base64Encode:function(input))
 * @param {jQuery} {base64Decode:function(input))
 * @return string
 */

(function($){

    var keyString = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

    var uTF8Encode = function(string) {
        string = string.replace(/\x0d\x0a/g, "\x0a");
        var output = "";
        for (var n = 0; n < string.length; n++) {
	        var c = string.charCodeAt(n);
	        if (c < 128) {
		        output += String.fromCharCode(c);
	        } else if ((c > 127) && (c < 2048)) {
		        output += String.fromCharCode((c >> 6) | 192);
		        output += String.fromCharCode((c & 63) | 128);
	        } else {
		        output += String.fromCharCode((c >> 12) | 224);
		        output += String.fromCharCode(((c >> 6) & 63) | 128);
		        output += String.fromCharCode((c & 63) | 128);
	        }
        }
        return output;
    };

    var uTF8Decode = function(input) {
        var string = "";
        var i = 0;
        var c = c1 = c2 = 0;
        while ( i < input.length ) {
	        c = input.charCodeAt(i);
	        if (c < 128) {
		        string += String.fromCharCode(c);
		        i++;
	        } else if ((c > 191) && (c < 224)) {
		        c2 = input.charCodeAt(i+1);
		        string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
		        i += 2;
	        } else {
		        c2 = input.charCodeAt(i+1);
		        c3 = input.charCodeAt(i+2);
		        string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
		        i += 3;
	        }
        }
        return string;
    }

    $.extend({
        base64Encode: function(input) {
	        var output = "";
	        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
	        var i = 0;
	        input = uTF8Encode(input);
	        while (i < input.length) {
		        chr1 = input.charCodeAt(i++);
		        chr2 = input.charCodeAt(i++);
		        chr3 = input.charCodeAt(i++);
		        enc1 = chr1 >> 2;
		        enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
		        enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
		        enc4 = chr3 & 63;
		        if (isNaN(chr2)) {
			        enc3 = enc4 = 64;
		        } else if (isNaN(chr3)) {
			        enc4 = 64;
		        }
		        output = output + keyString.charAt(enc1) + keyString.charAt(enc2) + keyString.charAt(enc3) + keyString.charAt(enc4);
	        }
	        return output;
        },
        base64Decode: function(input) {
	        var output = "";
	        var chr1, chr2, chr3;
	        var enc1, enc2, enc3, enc4;
	        var i = 0;
	        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
	        while (i < input.length) {
		        enc1 = keyString.indexOf(input.charAt(i++));
		        enc2 = keyString.indexOf(input.charAt(i++));
		        enc3 = keyString.indexOf(input.charAt(i++));
		        enc4 = keyString.indexOf(input.charAt(i++));
		        chr1 = (enc1 << 2) | (enc2 >> 4);
		        chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
		        chr3 = ((enc3 & 3) << 6) | enc4;
		        output = output + String.fromCharCode(chr1);
		        if (enc3 != 64) {
			        output = output + String.fromCharCode(chr2);
		        }
		        if (enc4 != 64) {
			        output = output + String.fromCharCode(chr3);
		        }
	        }
	        output = uTF8Decode(output);
	        return output;
        }
    });
})(jQuery);