source: imaps-frontend/node_modules/es-abstract/2020/IntegerIndexedElementGet.js@ d565449

'use strict';

var $TypeError = require('es-errors/type');

var GetValueFromBuffer = require('./GetValueFromBuffer');
var IsDetachedBuffer = require('./IsDetachedBuffer');
var IsValidIntegerIndex = require('./IsValidIntegerIndex');

var typedArrayLength = require('typed-array-length');
var typedArrayBuffer = require('typed-array-buffer');
var typedArrayByteOffset = require('typed-array-byte-offset');
var whichTypedArray = require('which-typed-array');

var tableTAO = require('./tables/typed-array-objects');

// https://262.ecma-international.org/11.0/#sec-integerindexedelementget

module.exports = function IntegerIndexedElementGet(O, index) {
        var arrayTypeName = whichTypedArray(O); // step 7
        if (!arrayTypeName) {
                throw new $TypeError('`O` must be a TypedArray'); // step 1
        }

        if (typeof index !== 'number') {
                throw new $TypeError('`index` must be a Number'); // step 2
        }

        var buffer = typedArrayBuffer(O); // step 3

        if (IsDetachedBuffer(buffer)) {
                throw new $TypeError('`O` has a detached buffer'); // step 4
        }

        if (!IsValidIntegerIndex(O, index)) {
                return void undefined; // step 5
        }

        var offset = typedArrayByteOffset(O); // step 6

        var length = typedArrayLength(O); // step 7

        if (index < 0 || index >= length) {
                return void undefined; // step 8
        }

        var elementType = tableTAO.name['$' + arrayTypeName]; // step 10

        var elementSize = tableTAO.size['$' + elementType]; // step 8

        var indexedPosition = (index * elementSize) + offset; // step 9

        return GetValueFromBuffer(buffer, indexedPosition, elementType, true, 'Unordered'); // step 11
};