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- '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/15.0/#sec-typedarraygetelement
- module.exports = function TypedArrayGetElement(O, index) {
- if (!isTypedArray(O)) {
- throw new $TypeError('Assertion failed: `O` must be a TypedArray instance');
- }
- if (typeof index !== 'number') {
- throw new $TypeError('Assertion failed: `index` must be a Number');
- }
- if (!IsValidIntegerIndex(O, index)) {
- return undefined; // step 1
- }
- var offset = typedArrayByteOffset(O); // step 2
- var elementSize = TypedArrayElementSize(O); // step 3
- var byteIndexInBuffer = (index * elementSize) + offset; // step 4
- var elementType = TypedArrayElementType(O); // step 5
- return GetValueFromBuffer(typedArrayBuffer(O), byteIndexInBuffer, elementType, true, 'UNORDERED'); // step 6
- };
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