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29 lines
957 B
29 lines
957 B
'use strict'; |
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var $TypeError = require('es-errors/type'); |
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var callBound = require('call-bound'); |
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var $arrayBufferResizable = callBound('%ArrayBuffer.prototype.resizable%', true); |
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var $sharedArrayGrowable = callBound('%SharedArrayBuffer.prototype.growable%', true); |
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var isArrayBuffer = require('is-array-buffer'); |
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var isSharedArrayBuffer = require('is-shared-array-buffer'); |
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// https://262.ecma-international.org/15.0/#sec-isfixedlengtharraybuffer |
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module.exports = function IsFixedLengthArrayBuffer(arrayBuffer) { |
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var isAB = isArrayBuffer(arrayBuffer); |
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var isSAB = isSharedArrayBuffer(arrayBuffer); |
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if (!isAB && !isSAB) { |
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throw new $TypeError('Assertion failed: `arrayBuffer` must be an ArrayBuffer or SharedArrayBuffer'); |
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} |
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if (isAB && $arrayBufferResizable) { |
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return !$arrayBufferResizable(arrayBuffer); // step 1 |
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} |
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if (isSAB && $sharedArrayGrowable) { |
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return !$sharedArrayGrowable(arrayBuffer); // step 1 |
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} |
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return true; // step 2 |
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};
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