Go Roman Numerals

This package was adapted from romannumeral to fit my specific minimal use-case.

All functionality except for the ability to convert integers to roman numerals has been removed.

Since I have less functionality to worry about, I was also able to implement vinculum notation support to extend the range of supported integers to 3,999,999. I also added the ability to choose between uppercase and lowercase roman numerals (optimized for lowercase due to my personal use-case).

If you need any additional functionality or further documentation, please see the original package.

Benchmark Results

Note that the benchmark results of this fork are slower than upstream due to the added vinculum notation support. This benchmark tests the highest supported integer (3,999,999) while upstream tests with 3,999.

goos: linux
goarch: amd64
pkg: github.com/rwinkhart/convertroman
cpu: AMD Ryzen 9 3900X 12-Core Processor
BenchmarkFromInt-24           	 5372720	       237.0 ns/op	      24 B/op	       1 allocs/op
BenchmarkFromIntCapital-24    	 2117424	       570.9 ns/op	      64 B/op	       3 allocs/op
PASS
ok  	github.com/rwinkhart/convertroman	4.098s

Example

package main

import (
	"fmt"
	rom "github.com/rwinkhart/convertroman"
)

func main() {
	var roman string

	// lowercase
	roman = rom.FromInt(4)
	if roman == "OOB" {
		panic("Input integer is out of bounds (greater than 3,999,999)")
	}
	fmt.Println(roman == "iv") // True

	// capital (slightly slower)
	// this example uses a number in vinculum notation to show that ANSI escape codes are used to provide the overline
	roman = rom.FromIntCapital(4)
	if roman == "OOB" {
		panic("Input integer is out of bounds (greater than 3,999,999)")
	}
	fmt.Println(roman == "\033[53mIV\033[0mLXV") // True
}