lix-website/themes/lix/assets/bootstrap/node_modules/es-abstract/2023/IntegerIndexedElementGet.js
2024-04-26 22:49:34 -06:00

39 lines
1.2 KiB
JavaScript

'use strict';
var $TypeError = require('es-errors/type');
var GetValueFromBuffer = require('./GetValueFromBuffer');
var IsValidIntegerIndex = require('./IsValidIntegerIndex');
var TypedArrayElementSize = require('./TypedArrayElementSize');
var TypedArrayElementType = require('./TypedArrayElementType');
var isTypedArray = require('is-typed-array');
var typedArrayBuffer = require('typed-array-buffer');
var typedArrayByteOffset = require('typed-array-byte-offset');
// https://262.ecma-international.org/13.0/#sec-integerindexedelementget
module.exports = function IntegerIndexedElementGet(O, index) {
if (!isTypedArray(O)) {
throw new $TypeError('Assertion failed: `O` must be a TypedArray');
}
if (typeof index !== 'number') {
throw new $TypeError('Assertion failed: `index` must be a Number');
}
if (!IsValidIntegerIndex(O, index)) {
return void undefined; // step 1
}
var offset = typedArrayByteOffset(O); // step 2
var elementSize = TypedArrayElementSize(O); // step 3
var indexedPosition = (index * elementSize) + offset; // step 4
var elementType = TypedArrayElementType(O); // step 5
return GetValueFromBuffer(typedArrayBuffer(O), indexedPosition, elementType, true, 'Unordered'); // step 11
};