//
//  Int+OAuthSwift.swift
//  OAuthSwift
//
//  Created by Dongri Jin on 1/28/15.
//  Copyright (c) 2015 Dongri Jin. All rights reserved.
//

import Foundation

extension Int {
    public func bytes(_ totalBytes: Int = MemoryLayout<Int>.size) -> [UInt8] {
        return arrayOfBytes(self, length: totalBytes)
    }
}

private func arrayOfBytes<T>(_ value: T, length: Int? = nil) -> [UInt8] {
    let totalBytes = length ?? MemoryLayout<T>.size

    let valuePointer = UnsafeMutablePointer<T>.allocate(capacity: 1)
    valuePointer.pointee = value

    let bytesPointer = UnsafeMutablePointer<UInt8>(OpaquePointer(valuePointer))
    var bytes = [UInt8](repeating: 0, count: totalBytes)
    for j in 0..<min(MemoryLayout<T>.size, totalBytes) {
        bytes[totalBytes - 1 - j] = (bytesPointer + j).pointee
    }

    valuePointer.deinitialize(count: 1)
    valuePointer.deallocate()

    return bytes
}