2016-08-25 19:08:12 +02:00
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<!DOCTYPE html>
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<html>
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<head>
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<title>ArduinoJson - JsonBuffer size calculator</title>
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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</head>
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<body>
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<div class="container">
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<div class="jumbotron">
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<h1>JsonBuffer size calculator</h1>
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</div>
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<div id='error' class="alert alert-danger" role="alert">
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Please paste your JSON in the "input" box
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</div>
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<div class="row">
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<div class="col-md-6">
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<h2>Input</h2>
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<textarea class="form-control" rows=30 id='input'></textarea><br>
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</div>
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<div id='results' class="col-md-6" style='display:none'>
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<h2>Result</h2>
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<h3>Expression</h3>
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<p><code id='resultexpr'></code></p>
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<table class="table">
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<thead>
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<th>Platform</th>
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<th>Size (in bytes)</th>
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</thead>
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<tbody>
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<tr>
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<td>AVR 8-bit</td>
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<td id='sizeavr8'></td>
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</tr>
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<tr>
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<td>ESP8266</td>
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<td id='sizeesp8266'></td>
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</tr>
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<tr>
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<td>x86</td>
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<td id='sizex86'></td>
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</tr>
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<tr>
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<td>x64</td>
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<td id='sizex64'></td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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</div>
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</body>
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<script type="text/javascript">
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function getExpression(obj) {
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var elements = [];
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if (obj instanceof Array) {
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elements.push("JSON_ARRAY_SIZE(" + obj.length + ")");
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for (var i = 0; i<obj.length; i++) {
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elements.push(getExpression(obj[i]))
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}
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}
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2016-08-26 10:10:19 +02:00
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else if (obj instanceof Object) {
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2016-08-25 19:08:12 +02:00
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elements.push("JSON_OBJECT_SIZE(" + Object.keys(obj).length + ")");
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for (var key in obj) {
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elements.push(getExpression(obj[key]))
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}
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}
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return elements.filter(function(x){return x.length > 0}).join(" + ");
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}
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input.oninput = function(e) {
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results.style.display = 'none';
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error.style.visibility = 'hidden';
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try {
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var obj = JSON.parse(input.value);
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var expression = getExpression(obj);
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resultexpr.innerText = expression;
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sizeavr8.innerText = eval(
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"function JSON_ARRAY_SIZE(n) { return 4 + 8*n }" +
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"function JSON_OBJECT_SIZE(n) { return 4 + 10*n }" +
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expression
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);
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sizeesp8266.innerText = eval(
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"function JSON_ARRAY_SIZE(n) { return 8 + 12*n }" +
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"function JSON_OBJECT_SIZE(n) { return 8 + 16*n }" +
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expression
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);
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sizex86.innerText = eval(
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"function JSON_ARRAY_SIZE(n) { return 12 + 24*n }" +
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"function JSON_OBJECT_SIZE(n) { return 12 + 32*n }" +
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expression
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);
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sizex64.innerText = eval(
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"function JSON_ARRAY_SIZE(n) { return 24 + 24*n }" +
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"function JSON_OBJECT_SIZE(n) { return 24 + 32*n }" +
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expression
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);
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results.style.display = 'block';
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}
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catch (ex) {
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error.innerText = "ERROR: " + ex.message;
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error.style.visibility = 'visible';
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}
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}
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</script>
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</html>
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