oBase64.js

(function (thiz) {
	
	var O = thiz.O;
     

	O.__.UTF8 = {
	
	/**
	*
	*  UTF-8 data encode / decode
	*  http://www.webtoolkit.info/
	*
	**/
	
	
	// adapted for O by Francesco Sullo
	
	    // public method for url encoding
	    encode : function (string) {
	        string = string.replace(/\r\n/g,"\n");
	        var utftext = "";
	
	        for (var n = 0; n < string.length; n++) {
	
	            var c = string.charCodeAt(n);
	
	            if (c < 128) {
	                utftext += String.fromCharCode(c);
	            }
	            else if((c > 127) && (c < 2048)) {
	                utftext += String.fromCharCode((c >> 6) | 192);
	                utftext += String.fromCharCode((c & 63) | 128);
	            }
	            else {
	                utftext += String.fromCharCode((c >> 12) | 224);
	                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
	                utftext += String.fromCharCode((c & 63) | 128);
	            }
	
	        }
	
	        return utftext;
	    },
	
	    // public method for url decoding
	    decode : function (utftext) {
	        var string = "";
	        var i = 0;
	        var c = c1 = c2 = 0;
	
	        while ( i < utftext.length ) {
	
	            c = utftext.charCodeAt(i);
	
	            if (c < 128) {
	                string += String.fromCharCode(c);
	                i++;
	            }
	            else if((c > 191) && (c < 224)) {
	                c2 = utftext.charCodeAt(i+1);
	                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
	                i += 2;
	            }
	            else {
	                c2 = utftext.charCodeAt(i+1);
	                c3 = utftext.charCodeAt(i+2);
	                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
	                i += 3;
	            }
	
	        }
	
	        return string;
	    }
	
	};



	O.__.Base64 = {
	
	/**
	*
	*  Base64 encode / decode
	*  http://www.webtoolkit.info/
	*
	**/
	
		// private property
		_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
	
		// public method for encoding
		encode : function (input,noPlus) {
			var output = "";
			var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
			var i = 0, keyStr = this._keyStr;
			if (noPlus) keyStr = keyStr.replace(/\+/,"!");
	
			input = O.__.UTF8.encode(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;
				}
				var
				output = output +
				keyStr.charAt(enc1) + keyStr.charAt(enc2) +
				keyStr.charAt(enc3) + keyStr.charAt(enc4);
	
			}
	
			return output;
		},
	
		// public method for decoding
		decode : function (input,noPlus) {
			var output = "";
			var chr1, chr2, chr3;
			var enc1, enc2, enc3, enc4;
			var i = 0, keyStr = this._keyStr;
			if (noPlus) keyStr = keyStr.replace(/\+/,"!");
	
			input = noPlus ? input.replace(/[^A-Za-z0-9\!\/\=]/g, "") : input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
	
			while (i < input.length) {
	
				enc1 = keyStr.indexOf(input.charAt(i++));
				enc2 = keyStr.indexOf(input.charAt(i++));
				enc3 = keyStr.indexOf(input.charAt(i++));
				enc4 = keyStr.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 = O.__.UTF8.decode(output);
	
			return output;
	
		}
	
	};



    O.expand({

            toBase64: function (str,x) {
                    return O.__.Base64.encode(str,x);
            },

            fromBase64: function (str,s) {
				  return O.__.Base64.decode(str,/!/.test(str));
            },

            toUtf8: function (str) {
                    return O.__.UTF8.encode(str.toString());
            },

            fromUtf8: function (str) {
                    return O.__.UTF8.decode(str.toString());
            }

    });



    O.extend({

            toBase64: function (x) {
                    this.O = O.toBase64(this.O.toString(),x);
                    return this;
            },

            fromBase64: function (s) {
                    if (s || O.isBase64(this.O)) {
                          this.O = O.fromBase64(this.O,/!/.test(this.O));
                    }
                    else this.log("fromBase64: Not a Base64 string");
                    return this;
            },

            toUtf8: function () {
                    this.O = O.toUtf8(this.O.toString());
                    return this;
            },

            fromUtf8: function () {
                    this.O = O.fromUtf8(this.O.toString());
                    return this;
            }

    });

})(this);