//
|
// CryptoSwift
|
//
|
// Copyright (C) 2014-2022 Marcin Krzyżanowski <marcin@krzyzanowskim.com>
|
// This software is provided 'as-is', without any express or implied warranty.
|
//
|
// In no event will the authors be held liable for any damages arising from the use of this software.
|
//
|
// Permission is granted to anyone to use this software for any purpose,including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:
|
//
|
// - The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation is required.
|
// - Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
|
// - This notice may not be removed or altered from any source or binary distribution.
|
//
|
|
/*
|
Bit shifting with overflow protection using overflow operator "&".
|
Approach is consistent with standard overflow operators &+, &-, &*, &/
|
and introduce new overflow operators for shifting: &<<, &>>
|
|
Note: Works with unsigned integers values only
|
|
Usage
|
|
var i = 1 // init
|
var j = i &<< 2 //shift left
|
j &<<= 2 //shift left and assign
|
|
@see: https://medium.com/@krzyzanowskim/swiftly-shift-bits-and-protect-yourself-be33016ce071
|
|
This fuctonality is now implemented as part of Swift 3, SE-0104 https://github.com/apple/swift-evolution/blob/master/proposals/0104-improved-integers.md
|
*/
|
