//go:build ignore
// +build ignore

package main

import "os"
import cre "git.tebibyte.media/sashakoshka/creature"

func main() {
	// this is a simple echo program. it will take in input indefinetly and
	// repeat it. due to line buffering in the terminal however, it will
	// only print output once you have pressed enter.
	machine := cre.Machine[int]{}
	machine.LoadProgram([]int{
		cre.PUSH, 0,
		cre.CAL,

		cre.PUSH, 1,
		cre.CAL,

		cre.PUSH, 1,
		cre.PUSH, 0,
		cre.JMP,
	})

	machine.Register(0, read)
	machine.Register(1, write)
	err := machine.Execute(0)
	if err != nil {
		panic(err.Error())
	}
}

func read(machine *cre.Machine[int]) (stop bool) {
	ch := []byte{0}
	os.Stdin.Read(ch)
	machine.Push(int(ch[0]))
	return
}

func write(machine *cre.Machine[int]) (stop bool) {
	print(string(rune(machine.Pop())))
	return
}