main.ts

import chalk from "chalk"

let arr = Array.from(new Uint8ClampedArray(40000),x=>0)
let outArr:number[] = []
let pointer = 0
let loopArr:number[] = []
let instructionIndex = 0
let inIndex = 0

function execute(char:string,inArr:number[]){
    if(char == '+'){
        arr[pointer] ++
    }else if(char == '-'){
        arr[pointer]--
    }else if(char == '>'){
        pointer++
    }else if(char == '<'){
        pointer--
    }else if(char == '.'){
       outArr.push(arr[pointer])
    }else if(char == ','){
        arr[pointer] = inArr[inIndex]
        if(inArr[inIndex] == undefined) arr[pointer] = 0
        inIndex++
    }else if(char == '['){
        loopArr.push(instructionIndex)
    }else if(char == ']'){
			if(loopArr.length == 0){ console.log("\x1b[31m","ERROR: unmatched ]"); process.exit()}
        if(arr[pointer] != 0){
            instructionIndex = loopArr[loopArr.length-1]
        }else{
            loopArr.pop()
        }
    }
}

export async function interpret(program:string[],inputArr:number[]){
    while(instructionIndex <= program.length){
        execute(program[instructionIndex],inputArr)
        instructionIndex++
    }
    console.log(chalk.blueBright("interpretation completed"))
    console.log("Memory Dump:",arr)
    console.log(`Pointer: ${pointer}, Value: ${arr[pointer]}`)
    console.log(`\nOutput: ${new TextDecoder().decode(new Uint8ClampedArray(outArr))}`)
}