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
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
52
|
//>>built
define("dojox/encoding/easy64", ["dojo/_base/lang"], function(lang) {
var easy64 = lang.getObject("dojox.encoding.easy64", true);
/*=====
easy64 = dojox.encoding.easy64;
=====*/
var c = function(input, length, result){
for(var i = 0; i < length; i += 3){
result.push(
String.fromCharCode((input[i] >>> 2) + 33),
String.fromCharCode(((input[i] & 3) << 4) + (input[i + 1] >>> 4) + 33),
String.fromCharCode(((input[i + 1] & 15) << 2) + (input[i + 2] >>> 6) + 33),
String.fromCharCode((input[i + 2] & 63) + 33)
);
}
};
easy64.encode = function(input){
// summary: encodes input data in easy64 string
// input: Array: an array of numbers (0-255) to encode
var result = [], reminder = input.length % 3, length = input.length - reminder;
c(input, length, result);
if(reminder){
var t = input.slice(length);
while(t.length < 3){ t.push(0); }
c(t, 3, result);
for(var i = 3; i > reminder; result.pop(), --i);
}
return result.join(""); // String
};
easy64.decode = function(input){
// summary: decodes the input string back to array of numbers
// input: String: the input string to decode
var n = input.length, r = [], b = [0, 0, 0, 0], i, j, d;
for(i = 0; i < n; i += 4){
for(j = 0; j < 4; ++j){ b[j] = input.charCodeAt(i + j) - 33; }
d = n - i;
for(j = d; j < 4; b[++j] = 0);
r.push(
(b[0] << 2) + (b[1] >>> 4),
((b[1] & 15) << 4) + (b[2] >>> 2),
((b[2] & 3) << 6) + b[3]
);
for(j = d; j < 4; ++j, r.pop());
}
return r;
};
return easy64;
});
|
