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19 lines
578 B
19 lines
578 B
/* -*- Mode: js; js-indent-level: 2; -*- */
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/*
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* Copyright 2011 Mozilla Foundation and contributors
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* Licensed under the New BSD license. See LICENSE or:
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* http://opensource.org/licenses/BSD-3-Clause
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*/
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const intToCharMap =
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'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'.split('')
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/**
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* Encode an integer in the range of 0 to 63 to a single base 64 digit.
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*/
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exports.encode = function (number) {
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if (0 <= number && number < intToCharMap.length) {
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return intToCharMap[number]
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}
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throw new TypeError('Must be between 0 and 63: ' + number)
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}
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