152 lines
8.8 KiB
HTML
152 lines
8.8 KiB
HTML
<!DOCTYPE html>
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<title>JSDoc: Source: encoding/base64.js</title>
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<h1 class="page-title">Source: encoding/base64.js</h1>
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<section>
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<article>
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<pre class="prettyprint source"><code>/* OpenPGP radix-64/base64 string encoding/decoding
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* Copyright 2005 Herbert Hanewinkel, www.haneWIN.de
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* version 1.0, check www.haneWIN.de for the latest version
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*
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* This software is provided as-is, without express or implied warranty.
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* Permission to use, copy, modify, distribute or sell this software, with or
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* without fee, for any purpose and by any individual or organization, is hereby
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* granted, provided that the above copyright notice and this paragraph appear
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* in all copies. Distribution as a part of an application or binary must
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* include the above copyright notice in the documentation and/or other materials
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* provided with the application or distribution.
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*/
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/**
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* @module encoding/base64
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*/
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var b64s = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
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/**
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* Convert binary string to radix-64
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* @param {String} t binary string to convert
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* @returns {string} radix-64 version of input string
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* @static
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*/
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function s2r(t) {
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var a, c, n;
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var r = '',
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l = 0,
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s = 0;
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var tl = t.length;
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for (n = 0; n < tl; n++) {
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c = t.charCodeAt(n);
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if (s === 0) {
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r += b64s.charAt((c >> 2) & 63);
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a = (c & 3) << 4;
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} else if (s == 1) {
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r += b64s.charAt((a | (c >> 4) & 15));
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a = (c & 15) << 2;
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} else if (s == 2) {
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r += b64s.charAt(a | ((c >> 6) & 3));
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l += 1;
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if ((l % 60) === 0)
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r += "\n";
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r += b64s.charAt(c & 63);
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}
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l += 1;
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if ((l % 60) === 0)
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r += "\n";
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s += 1;
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if (s == 3)
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s = 0;
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}
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if (s > 0) {
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r += b64s.charAt(a);
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l += 1;
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if ((l % 60) === 0)
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r += "\n";
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r += '=';
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l += 1;
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}
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if (s == 1) {
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if ((l % 60) === 0)
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r += "\n";
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r += '=';
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}
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return r;
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}
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/**
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* Convert radix-64 to binary string
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* @param {String} t radix-64 string to convert
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* @returns {string} binary version of input string
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* @static
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*/
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function r2s(t) {
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var c, n;
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var r = '',
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s = 0,
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a = 0;
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var tl = t.length;
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for (n = 0; n < tl; n++) {
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c = b64s.indexOf(t.charAt(n));
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if (c >= 0) {
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if (s)
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r += String.fromCharCode(a | (c >> (6 - s)) & 255);
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s = (s + 2) & 7;
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a = (c << s) & 255;
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}
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}
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return r;
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}
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module.exports = {
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encode: s2r,
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decode: r2s
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};
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</code></pre>
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</article>
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</section>
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Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.2.0</a> on Sun Jan 05 2014 23:07:43 GMT-0800 (PST)
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