package.helpers.defaultEndianness.js Maven / Gradle / Ivy

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ECMAScript spec abstract operations.

There is a newer version: 1.22.3

'use strict';

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

var $Uint8Array = GetIntrinsic('%Uint8Array%', true);
var $Uint32Array = GetIntrinsic('%Uint32Array%', true);

var typedArrayBuffer = require('typed-array-buffer');

var uInt32 = $Uint32Array && new $Uint32Array([0x12345678]);
var uInt8 = uInt32 && new $Uint8Array(typedArrayBuffer(uInt32));

module.exports = uInt8
	? uInt8[0] === 0x78
		? 'little'
		: uInt8[0] === 0x12
			? 'big'
			: uInt8[0] === 0x34
				? 'mixed' // https://developer.mozilla.org/en-US/docs/Glossary/Endianness
				: 'unknown' // ???
	: 'indeterminate'; // no way to know