Last change
on this file since 571e0df was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
initial commit
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Property mode
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100644
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File size:
1.1 KB
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1 | function _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); } }
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2 |
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3 | function _toArray(arr) { return Array.isArray(arr) ? arr : Array.from(arr); }
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4 |
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5 | function con(n) {
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6 | return 0x80 | n & 0x3f;
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7 | }
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8 |
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9 | export function encode(str) {
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10 | var arr = str.split("").map(function (x) {
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11 | return x.charCodeAt(0);
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12 | });
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13 | return _encode(arr);
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14 | }
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15 |
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16 | function _encode(arr) {
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17 | if (arr.length === 0) {
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18 | return [];
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19 | }
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20 |
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21 | var _arr = _toArray(arr),
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22 | n = _arr[0],
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23 | ns = _arr.slice(1);
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24 |
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25 | if (n < 0) {
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26 | throw new Error("utf8");
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27 | }
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28 |
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29 | if (n < 0x80) {
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30 | return [n].concat(_toConsumableArray(_encode(ns)));
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31 | }
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32 |
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33 | if (n < 0x800) {
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34 | return [0xc0 | n >>> 6, con(n)].concat(_toConsumableArray(_encode(ns)));
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35 | }
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36 |
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37 | if (n < 0x10000) {
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38 | return [0xe0 | n >>> 12, con(n >>> 6), con(n)].concat(_toConsumableArray(_encode(ns)));
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39 | }
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40 |
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41 | if (n < 0x110000) {
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42 | return [0xf0 | n >>> 18, con(n >>> 12), con(n >>> 6), con(n)].concat(_toConsumableArray(_encode(ns)));
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43 | }
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44 |
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45 | throw new Error("utf8");
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46 | } |
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