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extension UIDevice {
    func systemVersion() -> String {
        let os = switch self.userInterfaceIdiom {
        case .pad: "iPadOS"
        case .mac: "Mac Catalyst"
        case .tv: "tvOS"
        case .vision: "visionOS"
        default: "iOS"
        }
        let version = "\(os) \(self.systemVersion)"

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import Foundation

/// 四字符码，也称四字代码、FCC、4CC，大量运用于文件格式和经典 Mac OS API 中。
///
/// Darwin 提供 `FourCharCode` 数据类型用于保存四字符码，但 `FourCharCode` 只是 32 位整数 (`UInt32`, `CUnsignedInt`)
/// 的类型别名。在编程中，四字符码通常以字符串（例如：`"avc1"`）而非整数（例如：`1635148593`）表示，因此
/// `FourCharCode` 难以使用；也由于 `FourCharCode` 并非独立类型，向其添加扩展将导致扩展方法在所有整数上可用，极易引起误解且污染
/// Swift 标准类型 API。
///
/// ``FourCC`` 声明了新的类型，提供对 `FourCharCode` 的封装。``FourCC`` 可在源代码中通过字符串构造、或在运行时通过 `FourCharCode`

VaslD

#!/usr/bin/swift

import Foundation
import Security

let manager = FileManager.default

// Print usage if called with no arguments.
var inputs = CommandLine.arguments
if let command = inputs.first {

VaslD

import Foundation
import Network

/// TCP 监听（服务端）
public final class TCPServer: Sendable {
    let queue: DispatchQueue
    let listener: NWListener

    public init(port: Int) throws {
        guard let unsigned = UInt16(exactly: port), let port = NWEndpoint.Port(rawValue: unsigned) else {

VaslD

import Foundation
import Network

public typealias TCPClient = TCPConnection

/// TCP 节点（客户端）连接
///
/// 由于 TCP 是全双工通讯，服务端也需要作为节点建立连接。
public final class TCPConnection: Sendable {
    let queue: DispatchQueue

VaslD

import UIKit

open class UICollectionViewPlus: UICollectionView, UICollectionViewDelegate {
    // MARK: Scroll

    override public init(frame: CGRect, collectionViewLayout layout: UICollectionViewLayout) {
        super.init(frame: frame, collectionViewLayout: layout)
        super.delegate = self
    }

VaslD

import UIKit

open class UITableViewPlus: UITableView, UITableViewDelegate {
    // MARK: Scroll

    override public init(frame: CGRect, style: UITableView.Style) {
        super.init(frame: frame, style: style)
        super.delegate = self
    }

VaslD

import CommonCrypto
import CryptoKit
import Foundation

// MARK: - AES.CBC

public extension AES {
    enum CBC {}
}

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import AppleArchive
import CryptoKit
import Foundation
import System

public enum AA {
    public static let version = Int(APPLE_ARCHIVE_API_VERSION)

    static let fields = ArchiveHeader.FieldKeySet("TYP,PAT,LNK,DEV,UID,GID,MOD,FLG,MTM,CTM,SH2,DAT,SIZ")!

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import Foundation
import ArgumentParser

public enum Path {
    static let path = ProcessInfo.processInfo.environment["PATH"]!.components(separatedBy: ":")

    public static func find(_ command: String) throws -> URL {
        let files = FileManager.default
        for path in Self.path {
            let executable = URL(fileURLWithPath: path).appendingPathComponent(command, isDirectory: false)