'use strict';
|
|
var GetIntrinsic = require('get-intrinsic');
|
|
var $RangeError = GetIntrinsic('%RangeError%');
|
var $TypeError = GetIntrinsic('%TypeError%');
|
|
var callBound = require('call-bind/callBound');
|
|
// node 0.10 doesn't have a prototype method
|
var $byteOffset = callBound('%TypedArray.prototype.byteOffset%', true) || function (x) { return x.byteOffset; };
|
|
var ToIndex = require('./ToIndex');
|
var TypedArrayElementSize = require('./TypedArrayElementSize');
|
|
var isTypedArray = require('is-typed-array');
|
var typedArrayLength = require('typed-array-length');
|
|
// https://262.ecma-international.org/13.0/#sec-validateatomicaccess
|
|
module.exports = function ValidateAtomicAccess(typedArray, requestIndex) {
|
if (!isTypedArray(typedArray)) {
|
throw new $TypeError('Assertion failed: `typedArray` must be a TypedArray');
|
}
|
|
var length = typedArrayLength(typedArray); // step 1
|
|
var accessIndex = ToIndex(requestIndex); // step 2
|
|
/*
|
// this assertion can never be reached
|
if (!(accessIndex >= 0)) {
|
throw new $TypeError('Assertion failed: accessIndex >= 0'); // step 4
|
}
|
*/
|
|
if (accessIndex >= length) {
|
throw new $RangeError('index out of range'); // step 4
|
}
|
|
var elementSize = TypedArrayElementSize(typedArray); // step 5
|
|
var offset = $byteOffset(typedArray); // step 6
|
|
return (accessIndex * elementSize) + offset; // step 7
|
};
|
