SteveTrewick

import Foundation

/*
  Hex Dumper
*/


public struct HexDump {
  
  /*

SteveTrewick

// if we have a type param, can we get the bits we need out of it,
// like length?
let xtype = UInt16.self

// MemoryLayout<xtype> etc, no no no, so ...

func sizeof<T>(_ value: T.Type) -> Int {
  MemoryLayout<T>.size
}
let sz = sizeof(xtype)

SteveTrewick

// hex bytes of swift int in memory order (LSB->MSB)
func memhex<T: BinaryInteger>(_ value: T) -> String {
  
  var value = value
  var hex = ""
  
  withUnsafeBytes(of: &value) { bytes in
    for byte in bytes {
      hex += String(format:"%02x", byte) + " "
    }

SteveTrewick

import Foundation

/*
  Generate the I and Q components for a local oscillator
*/

public class IQ_Oscillator {
  
  let tau = 2 * Double.pi
  

SteveTrewick

import Foundation


/*
  Demo implementation of the famous Goertzel algorithm in Swift
  NB it is not currently possible to make this generic without
  also pulling in the Swift Numerics package.
 

SteveTrewick

// couple of useful functions for dealing with an AVCaptureSession
// chucked out there for posterity and search

// What led to me to do this      : Set size of AVCaptureAudioDataOutput buffer
// What might also lead you here  : Swift AudioValueTranslation


// PLEASE NOTE : There are no error checks in this code, demo purposes only.

import AVFoundation

SteveTrewick

import Foundation
import CoreAudio
import OSLog

/*

  So you want to get a list of audio input and output devices on macOS do you?
  Should be easy right?

SteveTrewick

func reverse <T: FixedWidthInteger> ( word: T ) -> T {
    
    var word = word
    var rev : T = 0
    
    for _ in (0..<word.bitWidth) {
        rev = (rev << 1) + (word & 0b1)
        word >>= 1
    }
    return rev

SteveTrewick

import Foundation

// so the main limitation of the previous efforts was that we couldn't do e.g.
// p { "here is " em { "some" } "emphasis" }
// without starting to write crazy amounts of buildBlock functions, so...

extension XMLNode {
    
    func named(_ name: String) -> XMLNode {

SteveTrewick

import Foundation


extension XMLNode {
    
    func named(_ name: String) -> XMLNode {
        self.name = name
        return self
    }