Initial commit

js_src/base64.js

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+/**
+ * @author Sergey Chikuyonok (serge.che@gmail.com)
+ * @link http://chikuyonok.ru
+ */
+
+var base64 = {
+	b64: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
+	/**
+	 * Encodes data with MIME base64
+	 * @author Tyler Akins (http://rumkin.com)
+	 * @improvements Bayron Guevara
+	 * @improvements Thunder.m
+	 * @improvements Kevin van Zonneveld (http://kevin.vanzonneveld.net)
+	 * @improvements Pellentesque Malesuada
+	 * @requires utf8_encode
+	 * @param {String} data Data to encode
+	 * @return {String}
+	 */
+	encode: function(data) {
+		var b64 = this.b64;
+		var o1, o2, o3, h1, h2, h3, h4, bits, i = ac = 0, enc="", tmp_arr = [];
+
+		if (!data) {
+			return data;
+		}
+
+//		data = this.utf8_encode(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('');
+
+		switch( data.length % 3 ){
+			case 1:
+				enc = enc.slice(0, -2) + '==';
+			break;
+			case 2:
+				enc = enc.slice(0, -1) + '=';
+			break;
+		}
+
+		return enc;
+	},
+
+	/**
+	 * Decodes data encoded with MIME base64
+	 * @author Tyler Akins (http://rumkin.com)
+	 * @improvements Aman Gupta
+	 * @improvements Onno Marsman
+	 * @improvements Pellentesque Malesuada
+	 * @improvements Kevin van Zonneveld (http://kevin.vanzonneveld.net)
+	 * @param {String} data Data to decode
+	 * @return {String}
+	 */
+	decode: function(data){
+		var b64 = this.b64;
+		var o1, o2, o3, h1, h2, h3, h4, bits, i = 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('');
+		dec = this.utf8_decode(dec);
+
+		return dec;
+	},
+
+	/**
+	 * Encodes an ISO-8859-1 string to UTF-8
+	 * @author Webtoolkit.info (http://www.webtoolkit.info/)
+	 * @improvements Aman Gupta
+	 * @improvements Kevin van Zonneveld (http://kevin.vanzonneveld.net)
+	 * @improvements Norman "zEh" Fuchs
+	 * @improvements hitwork
+	 * @improvements Onno Marsman
+	 * @param {String} string ISO-8859-1 string to encode
+	 * @return {String}
+	 */
+	utf8_encode: function(string) {
+		string = (string+'').replace(/\r\n/g, "\n").replace(/\r/g, "\n");
+
+		var utftext = "";
+		var start, end;
+		var stringl = 0;
+
+		start = end = 0;
+		stringl = string.length;
+		for (var n = 0; n < stringl; n++) {
+			var c1 = string.charCodeAt(n);
+			var enc = null;
+
+			if (c1 < 128) {
+				end++;
+			} else if((c1 > 127) && (c1 < 2048)) {
+				enc = String.fromCharCode((c1 >> 6) | 192) + String.fromCharCode((c1 & 63) | 128);
+			} else {
+				enc = String.fromCharCode((c1 >> 12) | 224) + String.fromCharCode(((c1 >> 6) & 63) | 128) + String.fromCharCode((c1 & 63) | 128);
+			}
+			if (enc != null) {
+				if (end > start) {
+					utftext += string.substring(start, end);
+				}
+				utftext += enc;
+				start = end = n+1;
+			}
+		}
+
+		if (end > start) {
+			utftext += string.substring(start, string.length);
+		}
+
+		return utftext;
+	},
+
+	/**
+	 * Converts a string with ISO-8859-1 characters encoded with UTF-8 
+	 * to single-byte ISO-8859-1
+	 * @author Webtoolkit.info (http://www.webtoolkit.info/)
+	 * @improvements Aman Gupta
+	 * @improvements Kevin van Zonneveld (http://kevin.vanzonneveld.net)
+	 * @improvements Norman "zEh" Fuchs
+	 * @improvements hitwork
+	 * @improvements Onno Marsman
+	 * @param {String} str_data 
+	 * @return {String}
+	 */
+	utf8_decode: function(str_data) {
+		var tmp_arr = [], i = ac = c1 = c2 = c3 = 0;
+
+		str_data += '';
+
+		while ( i < str_data.length ) {
+			c1 = str_data.charCodeAt(i);
+			if (c1 < 128) {
+				tmp_arr[ac++] = String.fromCharCode(c1);
+				i++;
+			} else if ((c1 > 191) && (c1 < 224)) {
+				c2 = str_data.charCodeAt(i+1);
+				tmp_arr[ac++] = String.fromCharCode(((c1 & 31) << 6) | (c2 & 63));
+				i += 2;
+			} else {
+				c2 = str_data.charCodeAt(i+1);
+				c3 = str_data.charCodeAt(i+2);
+				tmp_arr[ac++] = String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
+				i += 3;
+			}
+		}
+
+		return tmp_arr.join('');
+	}
+};