Use a crc library

package.json

@@ -17,6 +17,7 @@
 		"build": "node ./bin/build.mjs"
 	},
 	"dependencies": {
+		"@hqtsm/crc": "^1.0.3",
 		"@xmldom/xmldom": "^0.8.10"
 	},
 	"devDependencies": {

util/crc64xz.mjs

@@ -1,46 +1,23 @@
-/* eslint-disable no-bitwise */
-
 import {Writable} from 'node:stream';
 
-function createTable() {
-	const table = new BigUint64Array(256);
-	let crc;
-	for (let i = 0n; i < 256n; i++) {
-		crc = i;
-		for (let j = 0; j < 8; j++) {
-			crc = crc & 1n ? 0xc96c5795d7870f42n ^ (crc >> 1n) : crc >> 1n;
-		}
-		table[i] = crc;
-	}
-	return table;
-}
-
-let TABLE;
+import CRC64 from '@hqtsm/crc/crc-64/xz';
 
 export class Crc64xz extends Writable {
 	constructor() {
 		super();
-
-		TABLE = TABLE || createTable();
-		this._state = 0xffffffffffffffffn;
+		this._state = CRC64.init();
 	}
 
 	update(chunk, encoding) {
-		let state = this._state;
 		const b = Buffer.from(chunk, encoding);
-		const {length} = b;
-		for (let i = 0; i < length; i++) {
-			state = TABLE[Number(state & 0xffn) ^ b[i]] ^ (state >> 8n);
-		}
-		this._state = state;
+		this._state = CRC64.update(this._state, b);
 	}
 
 	digest(encoding = null) {
-		let state = this._state;
-		state = state ^ 0xffffffffffffffffn;
+		const value = CRC64.finalize(this._state);
 		this._state = null;
 		const e = Buffer.alloc(8);
-		e.writeBigUint64BE(state);
+		e.writeBigUint64BE(value);
 		return encoding ? e.toString(encoding) : e;
 	}