1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/awesome_js/Base64.js	Sun Jan 24 09:37:47 2010 -0500
     1.3 @@ -0,0 +1,142 @@
     1.4 +/**
     1.5 +*
     1.6 +*  Base64 encode / decode
     1.7 +*  http://www.webtoolkit.info/
     1.8 +*
     1.9 +**/
    1.10 + 
    1.11 +var Base64 = {
    1.12 + 
    1.13 +	// private property
    1.14 +	_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
    1.15 + 
    1.16 +	// public method for encoding
    1.17 +	encode : function (input) {
    1.18 +		var output = "";
    1.19 +		var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
    1.20 +		var i = 0;
    1.21 + 
    1.22 +		input = Base64._utf8_encode(input);
    1.23 + 
    1.24 +		while (i < input.length) {
    1.25 + 
    1.26 +			chr1 = input.charCodeAt(i++);
    1.27 +			chr2 = input.charCodeAt(i++);
    1.28 +			chr3 = input.charCodeAt(i++);
    1.29 + 
    1.30 +			enc1 = chr1 >> 2;
    1.31 +			enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
    1.32 +			enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
    1.33 +			enc4 = chr3 & 63;
    1.34 + 
    1.35 +			if (isNaN(chr2)) {
    1.36 +				enc3 = enc4 = 64;
    1.37 +			} else if (isNaN(chr3)) {
    1.38 +				enc4 = 64;
    1.39 +			}
    1.40 + 
    1.41 +			output = output +
    1.42 +			this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
    1.43 +			this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
    1.44 + 
    1.45 +		}
    1.46 + 
    1.47 +		return output;
    1.48 +	},
    1.49 + 
    1.50 +	// public method for decoding
    1.51 +	decode : function (input) {
    1.52 +		var output = "";
    1.53 +		var chr1, chr2, chr3;
    1.54 +		var enc1, enc2, enc3, enc4;
    1.55 +		var i = 0;
    1.56 + 
    1.57 +		input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
    1.58 + 
    1.59 +		while (i < input.length) {
    1.60 + 
    1.61 +			enc1 = this._keyStr.indexOf(input.charAt(i++));
    1.62 +			enc2 = this._keyStr.indexOf(input.charAt(i++));
    1.63 +			enc3 = this._keyStr.indexOf(input.charAt(i++));
    1.64 +			enc4 = this._keyStr.indexOf(input.charAt(i++));
    1.65 + 
    1.66 +			chr1 = (enc1 << 2) | (enc2 >> 4);
    1.67 +			chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
    1.68 +			chr3 = ((enc3 & 3) << 6) | enc4;
    1.69 + 
    1.70 +			output = output + String.fromCharCode(chr1);
    1.71 + 
    1.72 +			if (enc3 != 64) {
    1.73 +				output = output + String.fromCharCode(chr2);
    1.74 +			}
    1.75 +			if (enc4 != 64) {
    1.76 +				output = output + String.fromCharCode(chr3);
    1.77 +			}
    1.78 + 
    1.79 +		}
    1.80 + 
    1.81 +		output = Base64._utf8_decode(output);
    1.82 + 
    1.83 +		return output;
    1.84 + 
    1.85 +	},
    1.86 + 
    1.87 +	// private method for UTF-8 encoding
    1.88 +	_utf8_encode : function (string) {
    1.89 +		string = string.replace(/\r\n/g,"\n");
    1.90 +		var utftext = "";
    1.91 + 
    1.92 +		for (var n = 0; n < string.length; n++) {
    1.93 + 
    1.94 +			var c = string.charCodeAt(n);
    1.95 + 
    1.96 +			if (c < 128) {
    1.97 +				utftext += String.fromCharCode(c);
    1.98 +			}
    1.99 +			else if((c > 127) && (c < 2048)) {
   1.100 +				utftext += String.fromCharCode((c >> 6) | 192);
   1.101 +				utftext += String.fromCharCode((c & 63) | 128);
   1.102 +			}
   1.103 +			else {
   1.104 +				utftext += String.fromCharCode((c >> 12) | 224);
   1.105 +				utftext += String.fromCharCode(((c >> 6) & 63) | 128);
   1.106 +				utftext += String.fromCharCode((c & 63) | 128);
   1.107 +			}
   1.108 + 
   1.109 +		}
   1.110 + 
   1.111 +		return utftext;
   1.112 +	},
   1.113 + 
   1.114 +	// private method for UTF-8 decoding
   1.115 +	_utf8_decode : function (utftext) {
   1.116 +		var string = "";
   1.117 +		var i = 0;
   1.118 +		var c = c1 = c2 = 0;
   1.119 + 
   1.120 +		while ( i < utftext.length ) {
   1.121 + 
   1.122 +			c = utftext.charCodeAt(i);
   1.123 + 
   1.124 +			if (c < 128) {
   1.125 +				string += String.fromCharCode(c);
   1.126 +				i++;
   1.127 +			}
   1.128 +			else if((c > 191) && (c < 224)) {
   1.129 +				c2 = utftext.charCodeAt(i+1);
   1.130 +				string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
   1.131 +				i += 2;
   1.132 +			}
   1.133 +			else {
   1.134 +				c2 = utftext.charCodeAt(i+1);
   1.135 +				c3 = utftext.charCodeAt(i+2);
   1.136 +				string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
   1.137 +				i += 3;
   1.138 +			}
   1.139 + 
   1.140 +		}
   1.141 + 
   1.142 +		return string;
   1.143 +	}
   1.144 + 
   1.145 +}