use raw bitwise instead of buffers

src/plugins/ircColors/index.ts

@@ -21,27 +21,22 @@ import { Devs } from "@utils/constants";
 import definePlugin, { OptionType } from "@utils/types";
 
 // Compute a 64-bit FNV-1a hash of the passed data
-function hash(data: ArrayBuffer) {
+function hash(id: bigint) {
     const fnvPrime = 1099511628211n;
     const offsetBasis = 14695981039346656037n;
 
     let result = offsetBasis;
-    for (const byte of new Uint8Array(data)) {
-        result ^= BigInt(byte);
-        result = (result * fnvPrime) % 2n**32n;
+    for (let i = 7n; i >= 0n; i--) {
+        result ^= (id >> (8n * i)) & 0xffn;
+        result = (result * fnvPrime) % 2n ** 32n;
     }
 
     return result;
 }
 
 // Calculate a CSS color string based on the user ID
 function calculateNameColorForUser(id: bigint) {
-    const idBuffer = new ArrayBuffer(8);
-    {
-        const idView = new DataView(idBuffer);
-        idView.setBigUint64(0, id);
-    }
-    const idHash = hash(idBuffer);
+    const idHash = hash(id);
 
     return `hsl(${idHash % 360n}, 100%, ${settings.store.lightness}%)`;
 }