[6a3a178] | 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 | // `ArrayBuffer.prototype.slice` method
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| 19 | // https://tc39.es/ecma262/#sec-arraybuffer.prototype.slice
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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); // FF fix
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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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