1 | 'use strict';
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2 | var $ = require('../internals/export');
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3 | var fails = require('../internals/fails');
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4 | var ArrayBufferModule = require('../internals/array-buffer');
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5 | var anObject = require('../internals/an-object');
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6 | var toAbsoluteIndex = require('../internals/to-absolute-index');
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7 | var toLength = require('../internals/to-length');
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8 | var speciesConstructor = require('../internals/species-constructor');
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9 |
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10 | var ArrayBuffer = ArrayBufferModule.ArrayBuffer;
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11 | var DataView = ArrayBufferModule.DataView;
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12 | var nativeArrayBufferSlice = ArrayBuffer.prototype.slice;
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13 |
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14 | var INCORRECT_SLICE = fails(function () {
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15 | return !new ArrayBuffer(2).slice(1, undefined).byteLength;
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16 | });
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17 |
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18 |
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19 |
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20 | $({ target: 'ArrayBuffer', proto: true, unsafe: true, forced: INCORRECT_SLICE }, {
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21 | slice: function slice(start, end) {
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22 | if (nativeArrayBufferSlice !== undefined && end === undefined) {
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23 | return nativeArrayBufferSlice.call(anObject(this), start);
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24 | }
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25 | var length = anObject(this).byteLength;
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26 | var first = toAbsoluteIndex(start, length);
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27 | var fin = toAbsoluteIndex(end === undefined ? length : end, length);
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28 | var result = new (speciesConstructor(this, ArrayBuffer))(toLength(fin - first));
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29 | var viewSource = new DataView(this);
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30 | var viewTarget = new DataView(result);
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31 | var index = 0;
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32 | while (first < fin) {
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33 | viewTarget.setUint8(index++, viewSource.getUint8(first++));
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34 | } return result;
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35 | }
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36 | });
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