/
lostSun
/
project-client-server-apps
Обзор
Документация
Войти
/
lostSun
/
project-client-server-apps
Код
Запросы
0
Задачи
Вики
Пакеты
0
Релизы
0
CI/CD
Аналитика
Безопасность
master
node_modules/es-abstract/2024/ArrayBufferByteLength.js
38 строк
2 KB
1lostsun
initial commit
05 май 2025, 11:35
05 май 2025, 11:35
fe8f535
Код
Авторство
О чём код?
'use strict'; var $TypeError = require('es-errors/type'); // https://262.ecma-international.org/15.0/#sec-arraybufferbytelength var IsDetachedBuffer = require('./IsDetachedBuffer'); var isArrayBuffer = require('is-array-buffer'); var isSharedArrayBuffer = require('is-shared-array-buffer'); var arrayBufferByteLength = require('array-buffer-byte-length'); var isGrowable = false; // TODO: support this module.exports = function ArrayBufferByteLength(arrayBuffer, order) { var isSAB = isSharedArrayBuffer(arrayBuffer); if (!isArrayBuffer(arrayBuffer) && !isSAB) { throw new $TypeError('Assertion failed: `arrayBuffer` must be an ArrayBuffer or a SharedArrayBuffer'); } if (order !== 'SEQ-CST' && order !== 'UNORDERED') { throw new $TypeError('Assertion failed: `order` must be ~SEQ-CST~ or ~UNORDERED~'); } // 1. If IsSharedArrayBuffer(arrayBuffer) is true and arrayBuffer has an [[ArrayBufferByteLengthData]] internal slot, then // TODO: see if IsFixedLengthArrayBuffer can be used here in the spec instead if (isSAB && isGrowable) { // step 1 // a. Let bufferByteLengthBlock be arrayBuffer.[[ArrayBufferByteLengthData]]. // b. Let rawLength be GetRawBytesFromSharedBlock(bufferByteLengthBlock, 0, BIGUINT64, true, order). // c. Let isLittleEndian be the value of the [[LittleEndian]] field of the surrounding agent's Agent Record. // d. Return ℝ(RawBytesToNumeric(BIGUINT64, rawLength, isLittleEndian)). } if (IsDetachedBuffer(arrayBuffer)) { throw new $TypeError('Assertion failed: `arrayBuffer` must not be detached'); // step 2 } return arrayBufferByteLength(arrayBuffer); };