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<h1 class="page-title">Source: encoding/base64.js</h1>
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<pre class="prettyprint source"><code>/* OpenPGP radix-64/base64 string encoding/decoding
* Copyright 2005 Herbert Hanewinkel, www.haneWIN.de
* version 1.0, check www.haneWIN.de for the latest version
*
* This software is provided as-is, without express or implied warranty.
* Permission to use, copy, modify, distribute or sell this software, with or
* without fee, for any purpose and by any individual or organization, is hereby
* granted, provided that the above copyright notice and this paragraph appear
* in all copies. Distribution as a part of an application or binary must
* include the above copyright notice in the documentation and/or other materials
* provided with the application or distribution.
*/
/** @module encoding/base64 */
var b64s = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
function s2r(t) {
var a, c, n;
var r = '',
l = 0,
s = 0;
var tl = t.length;
for (n = 0; n < tl; n++) {
c = t.charCodeAt(n);
if (s == 0) {
r += b64s.charAt((c >> 2) & 63);
a = (c & 3) << 4;
} else if (s == 1) {
r += b64s.charAt((a | (c >> 4) & 15));
a = (c & 15) << 2;
} else if (s == 2) {
r += b64s.charAt(a | ((c >> 6) & 3));
l += 1;
if ((l % 60) == 0)
r += "\n";
r += b64s.charAt(c & 63);
}
l += 1;
if ((l % 60) == 0)
r += "\n";
s += 1;
if (s == 3)
s = 0;
}
if (s > 0) {
r += b64s.charAt(a);
l += 1;
if ((l % 60) == 0)
r += "\n";
r += '=';
l += 1;
}
if (s == 1) {
if ((l % 60) == 0)
r += "\n";
r += '=';
}
return r;
}
function r2s(t) {
var c, n;
var r = '',
s = 0,
a = 0;
var tl = t.length;
for (n = 0; n < tl; n++) {
c = b64s.indexOf(t.charAt(n));
if (c >= 0) {
if (s)
r += String.fromCharCode(a | (c >> (6 - s)) & 255);
s = (s + 2) & 7;
a = (c << s) & 255;
}
}
return r;
}
module.exports = {
encode: s2r,
decode: r2s
}
</code></pre>
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