SWCompression/Sources/Extensions.swift

//
//  DataExtension.swift
//  SWCompression
//
//  Created by Timofey Solomko on 19.09.16.
//  Copyright © 2017 Timofey Solomko. All rights reserved.
//

import Foundation

extension Data {

    func to<T>(type: T.Type) -> T {
        return self.withUnsafeBytes { $0.pointee }
    }

    func toArray<T>(type: T.Type) -> [T] {
        return self.withUnsafeBytes {
            [T](UnsafeBufferPointer(start: $0, count: self.count/MemoryLayout<T>.size))
        }
    }

}

extension UInt8 {

    func toInt() -> Int {
        return Int(bitPattern: UInt(self))
    }

}

extension Int {

    func toUInt8() -> UInt8 {
        return UInt8(truncatingBitPattern: UInt(self))
    }

    func reverseBytes() -> Int {
        var result = 0
        for i in 0..<4 {
            let byte = ((self & (0xFF << (i * 8))) >> (i * 8))
            result += byte << (8 * (3 - i))
        }
        return result
    }

}

extension String {

    subscript (index: Int) -> Character {
        let charIndex = self.index(self.startIndex, offsetBy: index)
        return self[charIndex]
    }

    subscript (range: Range<Int>) -> String {
        let startIndex = self.index(self.startIndex, offsetBy: range.lowerBound)
        let endIndex = self.index(startIndex, offsetBy: range.count)

        return self[startIndex..<endIndex]
    }

}