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26 lines
936 B
26 lines
936 B
'use strict'; |
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var $TypeError = require('es-errors/type'); |
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var ArrayBufferByteLength = require('./ArrayBufferByteLength'); |
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var IsDetachedBuffer = require('./IsDetachedBuffer'); |
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var dataViewBuffer = require('data-view-buffer'); |
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var isDataView = require('is-data-view'); |
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// https://262.ecma-international.org/15.0/#sec-makedataviewwithbufferwitnessrecord |
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module.exports = function MakeDataViewWithBufferWitnessRecord(obj, order) { |
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if (!isDataView(obj)) { |
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throw new $TypeError('MakeDataViewWithBufferWitnessRecord called with non-DataView'); |
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} |
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if (order !== 'SEQ-CST' && order !== 'UNORDERED') { |
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throw new $TypeError('Assertion failed: `order` must be ~SEQ-CST~ or ~UNORDERED~'); |
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} |
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var buffer = dataViewBuffer(obj); // step 1 |
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var byteLength = IsDetachedBuffer(buffer) ? 'DETACHED' : ArrayBufferByteLength(buffer, order); // steps 2 - 3 |
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return { '[[Object]]': obj, '[[CachedBufferByteLength]]': byteLength }; // step 4 |
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};
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