script.js

function to_binary(number){
    return (number).toString(2);
}

function to_decimal(binary){
    return parseInt(binary, 2);
}

function extend_to_bits(binary, bits = 32){
    var result = bits - binary.length;
    var zero_fill = "0".repeat(result);

    return zero_fill+binary;
    
}

function to_binaryC2(number, bits = 32){
    if (number >= 0){
        number = to_binary(number);
        return extend_to_bits(number, bits);
    }
    else{
        number = Math.pow(2, bits) + number;
        number = to_binary(number);
        return extend_to_bits(number, bits);
    }
}

function to_decimalC2(binary){
    bits = binary.length;
    decimal = to_decimal(binary);

    if (binary[0] == '0'){
        return decimal;
    }
    else{
        return -(Math.pow(2, bits)) + decimal;
    }
}


f1.addEventListener("submit", verifyNumber);
function verifyNumber(e){

    var bits = parseInt(document.f1.bits.value);
    if (bits > 32 || bits <2){
        alert("Valor Máximo = 32 e Valor minímo = 2");
        document.f1.bits.value = 32;
        bits = 32;
    } 
    var b = bits -1;
    var num = parseInt(document.f1.num.value);
    if ((num >= Math.pow(2,b) || (num < - Math.pow(2,b)))){
        alert("Número Inválido!");
    }
    else{
        updateHist(num, bits);
        writeResult(num, bits);
    }   

    e.preventDefault();
};

function updateHist(num, bits){
    var binNum = to_binaryC2(num, bits);
    var tr = document.createElement("tr");
    var tdN = document.createElement("td");
    var tdB = document.createElement("td");

    tr.setAttribute("class", "trHist");
    tdN.setAttribute("class", "tdN");
    tdB.setAttribute("class", "tdB");

    var nodeN = document.createTextNode(num);
    var nodeB = document.createTextNode(binNum);    

    tdN.appendChild(nodeN);
    tdB.appendChild(nodeB);
    tr.appendChild(tdN);
    tr.appendChild(tdB);    

    var data = document.getElementById("tData");

    data.appendChild(tr);    
}

function writeResult(num, bits){
    var binNum = to_binaryC2(num, bits);

    var pRes = document.getElementById("pRes");

    pRes.innerHTML = "Resultado:"+'\n'+binNum;
};

// seqGen = document.getElementById("bt1");
fSeq.addEventListener("submit", writeHist);
function writeHist(e){
    var min = parseInt(document.fSeq.min.value);
    var max = parseInt(document.fSeq.max.value);
    var bits = parseInt(document.f1.bits.value)
    for(var i = min; i <= max; i++){
        updateHist(i,bits);
    }

    e.preventDefault();
};

function clearHist(){
    document.getElementById("tData").innerHTML = "";
}

function clearItem(){
    alert(document.getElementById("tData").target.id);
}

fToDec.addEventListener("submit", writeDec);
function writeDec(e){
    var bin = document.fToDec.binValue.value;
    var len = bin.length;
    var number = to_decimalC2(bin);

    resToDec = document.getElementById("pToDec");
    
    if (bin == to_binaryC2(number,len)) {
        pToDec.innerHTML = "resultado:"+"<br>"+number;
    }
    else {
        pToDec.innerHTML = "O número que você digitou não é um número binário";
    }

    e.preventDefault();
}