SxsnPC/node_modules/es-abstract/2017/SetValueInBuffer.js

'use strict';

var GetIntrinsic = require('get-intrinsic');

var $SyntaxError = require('es-errors/syntax');
var $TypeError = require('es-errors/type');
var $Uint8Array = GetIntrinsic('%Uint8Array%', true);

var isInteger = require('math-intrinsics/isInteger');

var IsDetachedBuffer = require('./IsDetachedBuffer');
var NumberToRawBytes = require('./NumberToRawBytes');

var isArrayBuffer = require('is-array-buffer');
var isSharedArrayBuffer = require('is-shared-array-buffer');
var hasOwn = require('hasown');

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

var defaultEndianness = require('../helpers/defaultEndianness');
var forEach = require('../helpers/forEach');

// https://262.ecma-international.org/8.0/#sec-setvalueinbuffer

/* eslint max-params: 0 */

module.exports = function SetValueInBuffer(arrayBuffer, byteIndex, type, value, isTypedArray, order) {
	var isSAB = isSharedArrayBuffer(arrayBuffer);
	if (!isArrayBuffer(arrayBuffer) && !isSAB) {
		throw new $TypeError('Assertion failed: `arrayBuffer` must be an ArrayBuffer or a SharedArrayBuffer');
	}

	if (!isInteger(byteIndex)) {
		throw new $TypeError('Assertion failed: `byteIndex` must be an integer');
	}

	if (typeof type !== 'string' || !hasOwn(tableTAO.size, '$' + type)) {
		throw new $TypeError('Assertion failed: `type` must be one of ' + tableTAO.choices);
	}

	if (typeof value !== 'number') {
		throw new $TypeError('Assertion failed: `value` must be a number');
	}

	if (typeof isTypedArray !== 'boolean') {
		throw new $TypeError('Assertion failed: `isTypedArray` must be a boolean');
	}
	if (order !== 'SeqCst' && order !== 'Unordered' && order !== 'Init') {
		throw new $TypeError('Assertion failed: `order` must be `"SeqCst"`, `"Unordered"`, or `"Init"`');
	}

	if (arguments.length > 6 && typeof arguments[6] !== 'boolean') {
		throw new $TypeError('Assertion failed: `isLittleEndian` must be a boolean, if present');
	}

	if (IsDetachedBuffer(arrayBuffer)) {
		throw new $TypeError('Assertion failed: ArrayBuffer is detached'); // step 1
	}

	// 2. Assert: There are sufficient bytes in arrayBuffer starting at byteIndex to represent a value of type.

	if (byteIndex < 0) {
		throw new $TypeError('Assertion failed: `byteIndex` must be non-negative'); // step 3
	}

	// 4. Assert: Type(value) is Number.

	// 5. Let block be arrayBuffer.[[ArrayBufferData]].

	var elementSize = tableTAO.size['$' + type]; // step 6

	// 7. If isLittleEndian is not present, set isLittleEndian to to the value of the [[LittleEndian]] field of the surrounding agent's Agent Record.
	var isLittleEndian = arguments.length > 6 ? arguments[6] : defaultEndianness === 'little'; // step 8

	var rawBytes = NumberToRawBytes(type, value, isLittleEndian); // step 8

	if (isSAB) { // step 9
		/*
			Let execution be the [[CandidateExecution]] field of the surrounding agent's Agent Record.
			Let eventList be the [[EventList]] field of the element in execution.[[EventsRecords]] whose [[AgentSignifier]] is AgentSignifier().
			If isTypedArray is true and IsNoTearConfiguration(type, order) is true, let noTear be true; otherwise let noTear be false.
			Append WriteSharedMemory { [[Order]]: order, [[NoTear]]: noTear, [[Block]]: block, [[ByteIndex]]: byteIndex, [[ElementSize]]: elementSize, [[Payload]]: rawBytes } to eventList.
		*/
		throw new $SyntaxError('SharedArrayBuffer is not supported by this implementation');
	} else {
		// 10. Store the individual bytes of rawBytes into block, in order, starting at block[byteIndex].
		var arr = new $Uint8Array(arrayBuffer, byteIndex, elementSize);
		forEach(rawBytes, function (rawByte, i) {
			arr[i] = rawByte;
		});
	}

	// 11. Return NormalCompletion(undefined).
};