@tsxper/crc32
Advanced tools
Cycle Redundancy Check 32 (CRC32).
Calculates unsigned 32 bit checksum for 0xEDB88320 polynomial.
Speed optimization is done through using pre-calculated values from lookup tables.
Performance totally depends on the hardware. Results below are made on a very basic hardware with NodeJS v18.16.0, IntelCore i5 1.6 GHz CPU and DDR3 RAM.
| Processor | Rate | CRC32OPS | Input | Time |
|---|---|---|---|---|
| CRC32 | 1.2047 Gbit/s | 147059 | 10K random 1024-Bytes items | 68 msec |
| CRC32Streams | 850.1594 Mbit/s | - | 100MB random data file | 941 msec |
class CRC32
// Browser and NodeJS compatible.
class CRC32Streams
// Depends on NodeJS "stream" module.
"@tsxper/crc32" package is originally written in TypeScript. TypeScript type definitions are included.
UTF8 characters are fully supported.
crc32.calculate('español sí');
None.
const crc32 = new CRC32();
crc32.calculate('crc32 test');
// or
crc32.forString('crc32 test');
const crc32 = new CRC32();
crc32.forBytes(new TextEncoder().encode('crc32 test'));
Buffer extends Uint8Array.
const crc32 = new CRC32();
crc32.forBuffer(new TextEncoder().encode('crc32 test'));
const crc32 = new CRC32Streams();
const checksum = await crc32.forFile(filePath);
See "Compatibility".
HTML Copy/Paste Example
This example also shows how to calculate CRC32 for ArrayBuffer.
<!DOCTYPE html>
<html>
<body>
<p>Calculating crc32 for text "hello crc32": <span id="placeholder"></span></p>
<div>
<input type="file" id="input" />
<p>CRC32 of the file: <span id="filecrc32"></span></p>
</div>
<script type="importmap">
{
"imports": {
"@tsxper/crc32": "https://www.unpkg.com/@tsxper/crc32@2.1.0/esm/CRC32.js"
}
}
</script>
<script type="module">
import { CRC32 } from "@tsxper/crc32";
const crc32 = new CRC32();
function handleString() {
const crc = crc32.calculate("hello crc32");
document.getElementById('placeholder').innerText = crc;
}
handleString();
const fileInput = document.getElementById("input");
fileInput.addEventListener("change", handleFiles, false);
function handleFiles(e) {
if (!this.files.length) return;
const file = this.files[0];
const reader = new FileReader();
reader.onload = (e) => {
const buffer = e.target.result; // ArrayBuffer
const view = new Uint8Array(buffer);
document.getElementById('filecrc32').innerText = crc32.forBytes(view);
};
reader.readAsArrayBuffer(file);
}
</script>
</body>
</html>
For example, for sequence of events, converted into Uint8Array[] chunks.
const chunks = [new TextEncoder().encode('text1 text2')];
const crc32 = new CRC32();
let crc = 0;
for (const chunk of chunks) {
crc = crc32.forBytes(chunk, crc);
}
const crc32 = new CRC32();
const checksum10 = crc32.calculate("hi"); // 3633523372
const checksum16 = `0x${checksum10.toString(16)}`; // 0xd8932aac
Both, CommonJS and ESM modules are supported.
import { CRC32 } from '@tsxper/crc32';
// or
const { CRC32 } = require('@tsxper/crc32');
Supporting of the both module systems is done through "import", "require" and "default" conditions.
MIT License.
FAQs
Calculates unsigned CRC32. Optimized Cycle Redundancy Check.
The npm package @tsxper/crc32 receives a total of 5,421 weekly downloads. As such, @tsxper/crc32 popularity was classified as popular.
We found that @tsxper/crc32 demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Security News
Libxml2’s solo maintainer drops embargoed security fixes, highlighting the burden on unpaid volunteers who keep critical open source software secure.
Research
Security News
Socket researchers uncover how browser extensions in trusted stores are used to hijack sessions, redirect traffic, and manipulate user behavior.
Research
Security News
An in-depth analysis of credential stealers, crypto drainers, cryptojackers, and clipboard hijackers abusing open source package registries to compromise Web3 development environments.