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- /* -*- Mode: js; js-indent-level: 2; -*- */
- /*
- * Copyright 2011 Mozilla Foundation and contributors
- * Licensed under the New BSD license. See LICENSE or:
- * http://opensource.org/licenses/BSD-3-Clause
- */
- if (typeof define !== 'function') {
- var define = require('amdefine')(module, require);
- }
- define(function (require, exports, module) {
- var charToIntMap = {};
- var intToCharMap = {};
- 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
- .split('')
- .forEach(function (ch, index) {
- charToIntMap[ch] = index;
- intToCharMap[index] = ch;
- });
- /**
- * Encode an integer in the range of 0 to 63 to a single base 64 digit.
- */
- exports.encode = function base64_encode(aNumber) {
- if (aNumber in intToCharMap) {
- return intToCharMap[aNumber];
- }
- throw new TypeError("Must be between 0 and 63: " + aNumber);
- };
- /**
- * Decode a single base 64 digit to an integer.
- */
- exports.decode = function base64_decode(aChar) {
- if (aChar in charToIntMap) {
- return charToIntMap[aChar];
- }
- throw new TypeError("Not a valid base 64 digit: " + aChar);
- };
- });
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