(function () {
- var b64Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+ var encTable = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+ var decTable = new Array(
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
+ 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
+ -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
+ 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
+ -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
+ 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1);
Rakka.encodeBase64 = function (src) {
var len = src.length;
var c1 = src.charCodeAt(i++);
if (i == len) {
- ret += b64Chars.charAt(c1 >> 2);
- ret += b64Chars.charAt((c1 & 0x03) << 4);
+ ret += encTable.charAt(c1 >> 2);
+ ret += encTable.charAt((c1 & 0x03) << 4);
ret += "==";
}
else {
var c2 = src.charCodeAt(i++);
if (i == len) {
- ret += b64Chars.charAt(c1 >> 2);
- ret += b64Chars.charAt(((c1 & 0x03) << 4) | ((c2 & 0xF0) >> 4));
- ret += b64Chars.charAt((c2 & 0x0F) << 2);
+ ret += encTable.charAt(c1 >> 2);
+ ret += encTable.charAt(((c1 & 0x03) << 4) | ((c2 & 0xF0) >> 4));
+ ret += encTable.charAt((c2 & 0x0F) << 2);
ret += "=";
}
else {
var c3 = src.charCodeAt(i++);
- ret += b64Chars.charAt(c1 >> 2);
- ret += b64Chars.charAt(((c1 & 0x03) << 4) | ((c2 & 0xF0) >> 4));
- ret += b64Chars.charAt(((c2 & 0x0F) << 2) | ((c3 & 0xC0) >> 6));
- ret += b64Chars.charAt(c3 & 0x3F);
+ ret += encTable.charAt(c1 >> 2);
+ ret += encTable.charAt(((c1 & 0x03) << 4) | ((c2 & 0xF0) >> 4));
+ ret += encTable.charAt(((c2 & 0x0F) << 2) | ((c3 & 0xC0) >> 6));
+ ret += encTable.charAt(c3 & 0x3F);
+ }
+ }
+ }
+
+ return ret;
+ };
+
+ Rakka.decodeBase64 = function (src) {
+ var len = src.length;
+ var i = 0;
+ var ret = "";
+
+ while (i < len) {
+ var c1;
+ do {
+ c1 = decTable[src.charCodeAt(i++)];
+ } while (i < len && c1 == -1);
+
+ if (c1 != -1) {
+ var c2;
+ do {
+ c2 = decTable[src.charCodeAt(i++)];
+ } while (i < len && c2 == -1);
+
+ if (c2 != -1) {
+
+ ret += String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4));
+
+ var c3;
+ do {
+ c3 = src.charCodeAt(i++);
+ if (c3 == 61) {
+ return ret;
+ }
+ c3 = decTable[c3];
+ } while (i < len && c3 == -1);
+
+ if (c3 != -1) {
+ ret += String.fromCharCode(((c2 & 0x0F) << 4) | ((c3 & 0x3C) >> 2));
+
+ var c4;
+ do {
+ c4 = src.charCodeAt(i++);
+ if (c4 == 61) {
+ return ret;
+ }
+ c4 = decTable[c4];
+ } while (i < len && c4 == -1);
+
+ if (c4 != -1) {
+ ret += String.fromCharCode(((c3 & 0x03) << 6) | c4);
+ }
+ }
}
}
}