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Last change
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| 1 | /* -*- Mode: js; js-indent-level: 2; -*- */
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| 2 | /*
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| 3 | * Copyright 2011 Mozilla Foundation and contributors
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| 4 | * Licensed under the New BSD license. See LICENSE or:
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| 5 | * http://opensource.org/licenses/BSD-3-Clause
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| 6 | */
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| 7 |
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| 8 | const intToCharMap = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".split("");
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| 9 |
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| 10 | /**
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| 11 | * Encode an integer in the range of 0 to 63 to a single base 64 digit.
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| 12 | */
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| 13 | exports.encode = function(number) {
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| 14 | if (0 <= number && number < intToCharMap.length) {
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| 15 | return intToCharMap[number];
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| 16 | }
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| 17 | throw new TypeError("Must be between 0 and 63: " + number);
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| 18 | };
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