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Last change
on this file was d565449, checked in by stefan toskovski <stefantoska84@…>, 4 weeks ago |
Update repo after prototype presentation
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File size:
936 bytes
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1 | 'use strict';
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2 |
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3 | var $TypeError = require('es-errors/type');
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4 |
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5 | var ArrayBufferByteLength = require('./ArrayBufferByteLength');
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6 | var IsDetachedBuffer = require('./IsDetachedBuffer');
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7 |
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8 | var dataViewBuffer = require('data-view-buffer');
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9 | var isDataView = require('is-data-view');
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10 |
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11 | // https://262.ecma-international.org/15.0/#sec-makedataviewwithbufferwitnessrecord
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12 |
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13 | module.exports = function MakeDataViewWithBufferWitnessRecord(obj, order) {
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14 | if (!isDataView(obj)) {
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15 | throw new $TypeError('MakeDataViewWithBufferWitnessRecord called with non-DataView');
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16 | }
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17 | if (order !== 'SEQ-CST' && order !== 'UNORDERED') {
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18 | throw new $TypeError('Assertion failed: `order` must be ~SEQ-CST~ or ~UNORDERED~');
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19 | }
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20 |
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21 | var buffer = dataViewBuffer(obj); // step 1
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22 |
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23 | var byteLength = IsDetachedBuffer(buffer) ? 'DETACHED' : ArrayBufferByteLength(buffer, order); // steps 2 - 3
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24 |
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25 | return { '[[Object]]': obj, '[[CachedBufferByteLength]]': byteLength }; // step 4
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26 | };
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