main
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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Property mode
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100644
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File size:
966 bytes
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[d565449] | 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 callBound = require('call-bind/callBound');
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| 6 |
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| 7 | var $arrayBufferResizable = callBound('%ArrayBuffer.prototype.resizable%', true);
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| 8 | var $sharedArrayGrowable = callBound('%SharedArrayBuffer.prototype.growable%', true);
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| 9 |
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| 10 | var isArrayBuffer = require('is-array-buffer');
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| 11 | var isSharedArrayBuffer = require('is-shared-array-buffer');
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| 12 |
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| 13 | // https://262.ecma-international.org/15.0/#sec-isfixedlengtharraybuffer
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| 14 |
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| 15 | module.exports = function IsFixedLengthArrayBuffer(arrayBuffer) {
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| 16 | var isAB = isArrayBuffer(arrayBuffer);
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| 17 | var isSAB = isSharedArrayBuffer(arrayBuffer);
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| 18 | if (!isAB && !isSAB) {
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| 19 | throw new $TypeError('Assertion failed: `arrayBuffer` must be an ArrayBuffer or SharedArrayBuffer');
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| 20 | }
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| 21 |
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| 22 | if (isAB && $arrayBufferResizable) {
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| 23 | return !$arrayBufferResizable(arrayBuffer); // step 1
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| 24 | }
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| 25 | if (isSAB && $sharedArrayGrowable) {
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| 26 | return !$sharedArrayGrowable(arrayBuffer); // step 1
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| 27 | }
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| 28 | return true; // step 2
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| 29 | };
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