lix-website/themes/lix/assets/bootstrap/node_modules/es-abstract/2024/IsValidIntegerIndex.js

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2024-04-27 03:39:10 +00:00
'use strict';
var $TypeError = require('es-errors/type');
var IsDetachedBuffer = require('./IsDetachedBuffer');
var IsIntegralNumber = require('./IsIntegralNumber');
var IsTypedArrayOutOfBounds = require('./IsTypedArrayOutOfBounds');
var MakeTypedArrayWithBufferWitnessRecord = require('./MakeTypedArrayWithBufferWitnessRecord');
var TypedArrayLength = require('./TypedArrayLength');
var isNegativeZero = require('../helpers/isNegativeZero');
var isTypedArray = require('is-typed-array');
var typedArrayBuffer = require('typed-array-buffer');
// https://262.ecma-international.org/15.0/#sec-isvalidintegerindex
module.exports = function IsValidIntegerIndex(O, index) {
if (!isTypedArray(O)) {
throw new $TypeError('Assertion failed: `O` is not a TypedArray object');
}
if (typeof index !== 'number') {
throw new $TypeError('Assertion failed: `index` is not a Number');
}
var buffer = typedArrayBuffer(O);
if (IsDetachedBuffer(buffer)) { return false; } // step 1
if (!IsIntegralNumber(index)) { return false; } // step 2
if (isNegativeZero(index)) { return false; } // step 3
var taRecord = MakeTypedArrayWithBufferWitnessRecord(O, 'UNORDERED'); // step 4
if (IsTypedArrayOutOfBounds(taRecord)) {
return false; // step 6
}
var length = TypedArrayLength(taRecord); // step 7
if (index < 0 || index >= length) { return false; } // step 8
return true; // step 9
};