mikedeboer · August 24, 2010 10:28 · Aug 24, 2010
diff --git a/base64.js b/base64.js
@@ -0,0 +1,86 @@
+var jsBase64 = (function() {
+
+    var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
+
+    // public method for encoding
+    function encode(data) {
+        var o1, o2, o3, h1, h2, h3, h4, bits, i = 0, ac = 0, enc = "",
+            tmp_arr = [];
+
+        if (!data)
+            return data;
+
+        data = jsUTF8.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;
+    }
+
+    // public method for decoding
+    function decode(data) {
+        var o1, o2, o3, h1, h2, h3, h4, bits, i = 0, ac = 0, 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);
+
+        return jsUTF8.decode(tmp_arr.join(""));
+    }
+
+    return {
+        decode: decode,
+        encode: encode
+    };
+
+})();
diff --git a/utf8.js b/utf8.js
@@ -0,0 +1,97 @@
+var jsUTF8 = {
+    // private method for UTF-8 encoding
+    encode : function (string) {
+        // Encodes an ISO-8859-1 string to UTF-8
+        //
+        // version: 905.1217
+        // discuss at: http://phpjs.org/functions/utf8_encode
+        // +   original by: Webtoolkit.info (http://www.webtoolkit.info/)
+        // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
+        // +   improved by: sowberry
+        // +    tweaked by: Jack
+        // +   bugfixed by: Onno Marsman
+        // +   improved by: Yves Sucaet
+        // +   bugfixed by: Onno Marsman
+        // *     example 1: utf8_encode('Kevin van Zonneveld');
+        // *     returns 1: 'Kevin van Zonneveld'
+        string = (string + "").replace(/\r\n/g, "\n").replace(/\r/g, "\n");
+
+        var tmp_arr = [],
+            start   = 0,
+            end     = 0,
+            c1, enc;
+
+        for (var n = 0, l = string.length; n < l; n++) {
+            c1 = string.charCodeAt(n);
+            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)
+                    tmp_arr.push(string.substring(start, end));
+                tmp_arr.push(enc);
+                start = end = n + 1;
+            }
+        }
+
+        if (end > start)
+            tmp_arr.push(string.substring(start, string.length));
+
+        return tmp_arr.join("");
+    },
+
+    // private method for UTF-8 decoding
+    decode : function (str_data) {
+        // Converts a UTF-8 encoded string to ISO-8859-1
+        //
+        // version: 905.3122
+        // discuss at: http://phpjs.org/functions/utf8_decode
+        // +   original by: Webtoolkit.info (http://www.webtoolkit.info/)
+        // +      input by: Aman Gupta
+        // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
+        // +   improved by: Norman "zEh" Fuchs
+        // +   bugfixed by: hitwork
+        // +   bugfixed by: Onno Marsman
+        // +      input by: Brett Zamir (http://brett-zamir.me)
+        // +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
+        // *     example 1: utf8_decode('Kevin van Zonneveld');
+        // *     returns 1: 'Kevin van Zonneveld'
+        var tmp_arr = [], i = 0, ac = 0, c1 = 0, c2 = 0, 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('');
+    }
+
+};