source: trip-planner-front/node_modules/@webassemblyjs/utf8/lib/decoder.js@ eed0bf8

Last change on this file since eed0bf8 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 2.1 KB
Line 
1"use strict";
2
3Object.defineProperty(exports, "__esModule", {
4 value: true
5});
6exports.decode = decode;
7
8function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }
9
10function _toArray(arr) { return Array.isArray(arr) ? arr : Array.from(arr); }
11
12function con(b) {
13 if ((b & 0xc0) === 0x80) {
14 return b & 0x3f;
15 } else {
16 throw new Error("invalid UTF-8 encoding");
17 }
18}
19
20function code(min, n) {
21 if (n < min || 0xd800 <= n && n < 0xe000 || n >= 0x10000) {
22 throw new Error("invalid UTF-8 encoding");
23 } else {
24 return n;
25 }
26}
27
28function decode(bytes) {
29 return _decode(bytes).map(function (x) {
30 return String.fromCharCode(x);
31 }).join("");
32}
33
34function _decode(bytes) {
35 if (bytes.length === 0) {
36 return [];
37 }
38 /**
39 * 1 byte
40 */
41
42
43 {
44 var _bytes = _toArray(bytes),
45 b1 = _bytes[0],
46 bs = _bytes.slice(1);
47
48 if (b1 < 0x80) {
49 return [code(0x0, b1)].concat(_toConsumableArray(_decode(bs)));
50 }
51
52 if (b1 < 0xc0) {
53 throw new Error("invalid UTF-8 encoding");
54 }
55 }
56 /**
57 * 2 bytes
58 */
59
60 {
61 var _bytes2 = _toArray(bytes),
62 _b = _bytes2[0],
63 b2 = _bytes2[1],
64 _bs = _bytes2.slice(2);
65
66 if (_b < 0xe0) {
67 return [code(0x80, ((_b & 0x1f) << 6) + con(b2))].concat(_toConsumableArray(_decode(_bs)));
68 }
69 }
70 /**
71 * 3 bytes
72 */
73
74 {
75 var _bytes3 = _toArray(bytes),
76 _b2 = _bytes3[0],
77 _b3 = _bytes3[1],
78 b3 = _bytes3[2],
79 _bs2 = _bytes3.slice(3);
80
81 if (_b2 < 0xf0) {
82 return [code(0x800, ((_b2 & 0x0f) << 12) + (con(_b3) << 6) + con(b3))].concat(_toConsumableArray(_decode(_bs2)));
83 }
84 }
85 /**
86 * 4 bytes
87 */
88
89 {
90 var _bytes4 = _toArray(bytes),
91 _b4 = _bytes4[0],
92 _b5 = _bytes4[1],
93 _b6 = _bytes4[2],
94 b4 = _bytes4[3],
95 _bs3 = _bytes4.slice(4);
96
97 if (_b4 < 0xf8) {
98 return [code(0x10000, (((_b4 & 0x07) << 18) + con(_b5) << 12) + (con(_b6) << 6) + con(b4))].concat(_toConsumableArray(_decode(_bs3)));
99 }
100 }
101 throw new Error("invalid UTF-8 encoding");
102}
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