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lru_simulator.html
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<!DOCTYPE html>
<html>
<head>
<title>LRU</title>
<meta charset="utf-8">
<link rel="stylesheet" href="css/simulator.css">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.5.2/animate.min.css">
<link href="css/bootstrap.min.css" rel="stylesheet">
<link href="https://fonts.googleapis.com/css?family=PT+Sans" rel="stylesheet">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.0/jquery.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.3/css/all.min.css"/>
<link href="https://fonts.googleapis.com/css2?family=Baloo+Bhai+2:wght@700&family=PT+Sans&display=swap" rel="stylesheet">
</head>
<body>
<div class="final">
<div class="navbar">
<ul>
<li><a href="index.html">GO BACK TO HOME</a></li>
</ul>
</div>
<div class="imageContainer container-fluid" align="center" id="design">
<div class="heading">
<h1>SIMULATOR</h1>
</div>
<h1 style="padding:40px;">
Least Recently Used (LRU)
</h1>
<form>
<div class"container-fluid">
<div class="form-group row" style="margin-left:40px;width:25vw;display:block">
<input type="number" id="frames" class="form-control" placeholder="Number of frames:">
</div>
<div class="form-group row" style="margin-left:40px;width:25vw;display:block">
<input type="text" id="rs" class="form-control" placeholder="Page Reference string:">
</div>
<input type="button" style="margin-left:40px; margin-bottom:20px" class="btn btn-primary" onclick="lru()" value="Simulate" id="sim">
<input type="reset" style="margin-left:40px; margin-bottom:20px; display:none;" class="btn btn-primary" onClick="window.location.reload()" id="resetbtn" value="Reset">
<div id="div1" class="table-responsive" style="width:80vw;margin:auto;text-align:center"></div>
<div id="sp1"></div>
<div id="sp2"></div>
</div>
</form>
<div id="bottom"></div>
</div>
</body>
<!-- <script type="text/javascript" src="index.js"></script> -->
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
<script>
var count = 0;
var pages = [];
var pf;
var ph;
var f;
var rs;
var txt;
function lru() {
f = document.getElementById("frames").value;
rs = document.getElementById("rs").value;
var isnum = /^\d+$/.test(rs);
if (f <= 0) {
alert("Invalid input!");
return;
} else if (!isnum) {
alert("Use a number string (like 4761761272)");
return;
}
var x = document.getElementById("resetbtn").style.display = "block";;
var prev;
pf = 0;
ph = 0;
var k = 0;
var l;
var least;
var index;
var i, row = Number(f) + 1,
j, col = rs.length;
pages = new Array(row);
for (i = 0; i < row; i++)
pages[i] = new Array(col);
for (i = 0; i < row - 1; i++) {
for (j = 0; j < col; j++)
pages[i][j] = "--";
}
for (j = 0; j < col; j++) {
var smallest = -1;
var flag = false;
if (j > 0) {
for (i = 0; i < row - 1; i++)
pages[i][j] = pages[i][j - 1];
}
for (i = 0; i < row - 1; i++) {
if (rs[k] == pages[i][j])
flag = true;
}
if (flag == false) {
for (i = 0; i < row - 1; i++) {
if (pages[i][j] == "--") {
smallest = i;
break;
}
}
if (smallest != -1) {
pages[smallest][j] = rs[k];
} else {
index = 9999;
for (i = 0; i < row - 1; i++) {
for (l = j - 1; l >= 0; l--) {
if (pages[i][j] == rs[l]) {
least = l;
break;
}
}
if (index > least)
index = least;
}
for (i = 0; i < row - 1; i++) {
if (pages[i][j] == rs[index])
break;
}
pages[i][j] = rs[k];
}
pages[row - 1][j] = "PF";
k++;
pf++;
console.log("pf=", pf);
} else {
ph++;
k++;
console.log("ph=", ph);
pages[row - 1][j] = "PH";
}
}
txt = " ";
var real;
var m = 0;
var $table = $("<table border='2'></table>");
$table.addClass('table');
$tbody = $("<tbody></tbody>");
for (i = 0; i < row; i++) {
var line = $("<tr></tr>");
// line.css({'background-color': getRandomColor()});
for (j = 0; j < col; j++) {
if (i == row - 1) {
if (("PH".localeCompare(pages[i][j]) == 0)) {
line.append('<td style="color:green">' + 'PH' + '</td>');
} else {
line.append('<td style="color:red">' + 'PF' + '</td>');
}
$tbody.prepend(line);
} else {
line.append($("<td></td>").html(pages[i][j] + ""));
$tbody.prepend(line);
}
}
}
$table.append($tbody);
$table.appendTo($("#div1"));
$("#sp1").html('<p style="text-align:center">' + "<b>The no of page faults is:</b>" + " " + '<span style="color:red">' + pf + '</span>' + '</p>')
$("#sp2").html('<p style="text-align:center">' + "<b>The no of page hits is:</b>" + " " + '<span style="color:green">' + ph + '</span>' + '</p>')
document.getElementById('bottom').scrollIntoView();
txt = txt + "\n";
console.log(txt);
document.getElementById("sim").style.display = "none";
document.getElementById("frames").disabled = true;
document.getElementById("rs").disabled = true;
}
</script>
</html>