This code calculates the CRC checksum of a specific Quake 3 game archive file and can be used to verify its integrity by comparing the result to known checksum values. It imports a checksum function, defines a test function, and exports the function for use in other parts of the application.

Run example

npm run import -- "test crc file"

test crc file

var importer = require('../Core')
var checksumZip = importer.import("crc checksum file")

var TEST_PK3 = '/Applications/ioquake3/baseq3/pak8a.pk3'

async function testCrcFile() {
    return await checksumZip(TEST_PK3)
}

/*
1566731103,
298122907,
412165236,
2991495316,
1197932710,
4087071573,
3709064859,
908855077,
977125798
*/

module.exports = testCrcFile

const fs = require('fs');
const crc32 = require('crc-32');
const path = require('path');

/**
 * Importer for core modules.
 */
const importer = require('../Core');

/**
 * Import the crc checksum file module.
 */
const checksumZip = importer.import('crc-checksum-file');

/**
 * Test the crc checksum file function.
 * 
 * @returns {Promise<number>} The crc checksum of the file at TEST_PK3.
 */
async function testCrcFile() {
  const filePath = '/Applications/ioquake3/baseq3/pak8a.pk3';
  const fileBuffer = await fs.promises.readFile(filePath);
  const crc = crc32.buf(fileBuffer);
  return crc & 0xFFFFFFFF;
}

/**
 * Example test data.
 * 
 * @type {number[]}
 */
const testData = [
  1566731103,
  298122907,
  412165236,
  2991495316,
  1197932710,
  4087071573,
  3709064859,
  908855077,
  977125798,
];

/**
 * Export the testCrcFile function.
 */
module.exports = testCrcFile;

// TODO: Implement a way to test the crc checksum file function with the test data
// TODO: Consider adding input validation for the file path

This code snippet defines an asynchronous function testCrcFile that calculates the CRC checksum of a Quake 3 game archive file (pak8a.pk3).

Here's a breakdown:

1. Imports:

   • It imports a checksumZip function from a module named crc checksum file using the importer object.

2. Test File:

   • It defines a constant TEST_PK3 pointing to the path of the Quake 3 archive file to be checked.

3. Checksum Function:

   • It defines an asynchronous function testCrcFile that calls the imported checksumZip function with the TEST_PK3 file path.
   • It returns the result of the checksum calculation.

4. Output:

   • The code includes a commented-out section that appears to be a list of expected CRC checksum values for the pak8a.pk3 file.

5. Export:

   • The testCrcFile function is exported as a module, making it available for use in other parts of the application.

Purpose:

This code snippet provides a simple utility for verifying the integrity of a Quake 3 game archive file by comparing its calculated CRC checksum to a known set of values.