/**
 * * jQuery BASE64 functions * *
 * <code>	 * 		Encodes the given data with base64. 	 * 		String $.base64Encode ( String str )	 *		<br />	 * 		Decodes a base64 encoded data.	 * 		String $.base64Decode ( String str )	 * 	</code> * *
 * Encodes and Decodes the given data in base64. * This encoding is designed to
 * make binary data survive transport through transport layers that are not
 * 8-bit clean, such as mail bodies. * Base64-encoded data takes about 33% more
 * space than the original data. * This javascript code is used to encode /
 * decode data using base64 (this encoding is designed to make binary data
 * survive transport through transport layers that are not 8-bit clean). Script
 * is fully compatible with UTF-8 encoding. You can use base64 encoded data as
 * simple encryption mechanism. * If you plan using UTF-8 encoding in your
 * project don't forget to set the page encoding to UTF-8 (Content-Type meta
 * tag). * This function orginally get from the WebToolkit and rewrite for using
 * as the jQuery plugin. * * Example * Code *
 * <code>	 * 			$.base64Encode("I'm Persian."); 	 * 		</code> * Result *
 * <code>	 * 			"SSdtIFBlcnNpYW4u"	 * 		</code> * Code *
 * <code>	 * 			$.base64Decode("SSdtIFBlcnNpYW4u");	 * 		</code> * Result *
 * <code>	 * 			"I'm Persian."	 * 		</code> * *
 * 
 * @alias Muhammad Hussein Fattahizadeh < muhammad [AT] semnanweb [DOT] com > *
 * @link http://www.semnanweb.com/jquery-plugin/base64.html (no longer
 *       available?) *
 * @link https://gist.github.com/gists/1602210 *
 * @see http://www.webtoolkit.info/ *
 * @license http://www.gnu.org/licenses/gpl.html [GNU General Public License] *
 * @param {jQuery}
 *            {base64Encode:function(input)) *
 * @param {jQuery}
 *            {base64Decode:function(input)) *
 * @return string
 */
(function($) {
	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);