// +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] { Program: []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
}