refactor: improve code readability

vHeemstra · Aug 10, 2024 · 0390e9c · 0390e9c
1 parent f9dacba
commit 0390e9c
Showing 1 changed file with 10 additions and 13 deletions.
diff --git a/src/index.ts b/src/index.ts
@@ -38,25 +38,22 @@ export default function isApng(buffer: Buffer | Uint8Array): boolean {
   let firstIndex = 0
   let secondIndex = 0
   for (let i = 0; i < buffer.length; i++) {
-    if (
-      !foundFirst &&
-      (buffer[i] === sequences.animationControlChunk[firstIndex] ||
-        (firstIndex > 0 &&
-          ((firstIndex = 0) ||
-            buffer[i] === sequences.animationControlChunk[firstIndex])))
-    ) {
+    if (buffer[i] !== sequences.animationControlChunk[firstIndex]) {
+      firstIndex = 0
+    }
+
+    if (buffer[i] === sequences.animationControlChunk[firstIndex]) {
       firstIndex++
       if (firstIndex === sequences.animationControlChunk.length) {
         return true
       }
     }
 
-    if (
-      buffer[i] === sequences.imageDataChunk[secondIndex] ||
-      (secondIndex > 0 &&
-        ((secondIndex = 0) ||
-          buffer[i] === sequences.imageDataChunk[secondIndex]))
-    ) {
+    if (buffer[i] !== sequences.imageDataChunk[secondIndex]) {
+      secondIndex = 0
+    }
+
+    if (buffer[i] === sequences.imageDataChunk[secondIndex]) {
       secondIndex++
       if (secondIndex === sequences.imageDataChunk.length) {
         return false