108 lines
2.7 KiB
Swift
108 lines
2.7 KiB
Swift
//
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// DataUnit.swift
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// TunnelKit
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//
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// Created by Davide De Rosa on 3/30/18.
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// Copyright (c) 2023 Davide De Rosa. All rights reserved.
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//
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// https://github.com/passepartoutvpn
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//
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// This file is part of TunnelKit.
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//
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// TunnelKit is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// TunnelKit is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with TunnelKit. If not, see <http://www.gnu.org/licenses/>.
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//
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import Foundation
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/// Helps expressing integers in bytes, kB, MB, GB.
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public enum DataUnit: UInt, CustomStringConvertible {
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case byte = 1
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case kilobyte = 1024
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case megabyte = 1048576
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case gigabyte = 1073741824
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fileprivate var showsDecimals: Bool {
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switch self {
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case .byte, .kilobyte:
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return false
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case .megabyte, .gigabyte:
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return true
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}
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}
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fileprivate var boundary: UInt {
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return UInt(0.1 * Double(rawValue))
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}
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// MARK: CustomStringConvertible
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public var description: String {
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switch self {
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case .byte:
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return "B"
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case .kilobyte:
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return "kB"
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case .megabyte:
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return "MB"
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case .gigabyte:
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return "GB"
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}
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}
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}
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/// Supports being represented in data unit.
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public protocol DataUnitRepresentable {
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/// Returns self expressed in bytes, kB, MB, GB.
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var descriptionAsDataUnit: String { get }
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}
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extension UInt: DataUnitRepresentable {
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private static let allUnits: [DataUnit] = [
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.gigabyte,
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.megabyte,
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.kilobyte,
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.byte
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]
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public var descriptionAsDataUnit: String {
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if self == 0 {
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return "0B"
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}
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for u in Self.allUnits {
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if self >= u.boundary {
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if !u.showsDecimals {
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return "\(self / u.rawValue)\(u)"
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}
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let count = Double(self) / Double(u.rawValue)
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return String(format: "%.2f%@", count, u.description)
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}
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}
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fatalError("Number is negative")
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}
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}
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extension Int: DataUnitRepresentable {
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public var descriptionAsDataUnit: String {
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return UInt(self).descriptionAsDataUnit
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}
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}
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