This a migration from my MegaCalc repo (AppKit) to SwiftUI

This is still a Work in Progress as I continue to learn SwiftUI

• Add UI tests
• Support Light and Dark Themes
• Show number of digits for A, B and Result
• Implement Algo delegates to show progress, duration
• Improve UI to something like Neumorphic
• Refactor code using Clean Architecture Structure
• Implement Accessibility features with SwiftUI
• Add Unit tests for Algos

• No known issues...

• Async/Await is is not supported on MacOS < 12. So not using it as I want to support Big Sur (11.6)

I created a first version of this calculator in 1993.

At that time, I read in a magazine that someone was trying to break the World record for the biggest multiplication. The record was with 2 numbers of 22,000 digits in 24 hours.
Experimenting at that time in C++ on Windows, I already made a String based calculator for large numbers.
So I decided to see if I could come with a fast algorithm to beat that 22,000 digits multiplication records.

After 2 weeks where I:

• Flipped my algorithm inside-out
• Reached the 640K limit of MS-DOS

I was able to multiply two 500,000 digits numbers in less than 24 hours of computation.

In 1995, I used a Beta of Windows 95 to push that limit and I also made a Windows MegaCalc where the multiplications were interruptible and restartable.

Since then, I have implemented MegaCalc in:

• C#
• Java
• Swift

The Swift version has the following properties:

• Uses a simple Mac UI.
• Shows good example of TDD (Test Driven Development) where you build your tests before creating the code.
• Uses Xcode to run Unit tests and UI tests.

by Francois Robert