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32 lines
846 B
32 lines
846 B
'use strict'; |
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var $TypeError = require('es-errors/type'); |
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var IsInteger = require('./IsInteger'); |
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var isNegativeZero = require('math-intrinsics/isNegativeZero'); |
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var isTypedArray = require('is-typed-array'); |
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var typedArrayBuffer = require('typed-array-buffer'); |
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// https://262.ecma-international.org/11.0/#sec-isvalidintegerindex |
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module.exports = function IsValidIntegerIndex(O, index) { |
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if (!isTypedArray) { |
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throw new $TypeError('Assertion failed: `O` must be a Typed Array'); |
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} |
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typedArrayBuffer(O); // step 1 |
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if (typeof index !== 'number') { |
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throw new $TypeError('Assertion failed: Type(index) is not Number'); // step 2 |
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} |
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if (!IsInteger(index)) { return false; } // step 3 |
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if (isNegativeZero(index)) { return false; } // step 4 |
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if (index < 0 || index >= O.length) { return false; } // step 5 |
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return true; // step 6 |
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};
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