source: trip-planner-front/node_modules/source-map-js/lib/base64.js@ 59329aa

Last change on this file since 59329aa was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
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1/* -*- Mode: js; js-indent-level: 2; -*- */
2/*
3 * Copyright 2011 Mozilla Foundation and contributors
4 * Licensed under the New BSD license. See LICENSE or:
5 * http://opensource.org/licenses/BSD-3-Clause
6 */
7
8var intToCharMap = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'.split('');
9
10/**
11 * Encode an integer in the range of 0 to 63 to a single base 64 digit.
12 */
13exports.encode = function (number) {
14 if (0 <= number && number < intToCharMap.length) {
15 return intToCharMap[number];
16 }
17 throw new TypeError("Must be between 0 and 63: " + number);
18};
19
20/**
21 * Decode a single base 64 character code digit to an integer. Returns -1 on
22 * failure.
23 */
24exports.decode = function (charCode) {
25 var bigA = 65; // 'A'
26 var bigZ = 90; // 'Z'
27
28 var littleA = 97; // 'a'
29 var littleZ = 122; // 'z'
30
31 var zero = 48; // '0'
32 var nine = 57; // '9'
33
34 var plus = 43; // '+'
35 var slash = 47; // '/'
36
37 var littleOffset = 26;
38 var numberOffset = 52;
39
40 // 0 - 25: ABCDEFGHIJKLMNOPQRSTUVWXYZ
41 if (bigA <= charCode && charCode <= bigZ) {
42 return (charCode - bigA);
43 }
44
45 // 26 - 51: abcdefghijklmnopqrstuvwxyz
46 if (littleA <= charCode && charCode <= littleZ) {
47 return (charCode - littleA + littleOffset);
48 }
49
50 // 52 - 61: 0123456789
51 if (zero <= charCode && charCode <= nine) {
52 return (charCode - zero + numberOffset);
53 }
54
55 // 62: +
56 if (charCode == plus) {
57 return 62;
58 }
59
60 // 63: /
61 if (charCode == slash) {
62 return 63;
63 }
64
65 // Invalid base64 digit.
66 return -1;
67};
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