refactor: susun semula struktur folder — Laravel source ke src/

vendor/intervention/gif/src/Decoders/CommentExtensionDecoder.php

@@ -0,0 +1,65 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Intervention\Gif\Decoders;
+
+use Intervention\Gif\Blocks\CommentExtension;
+use Intervention\Gif\Exceptions\DecoderException;
+
+class CommentExtensionDecoder extends AbstractDecoder
+{
+    /**
+     * Decode current source.
+     *
+     * @throws DecoderException
+     */
+    public function decode(): CommentExtension
+    {
+        $this->nextBytesOrFail(2); // skip marker & label
+
+        $extension = new CommentExtension();
+        foreach ($this->decodeComments() as $comment) {
+            $extension->addComment($comment);
+        }
+
+        return $extension;
+    }
+
+    /**
+     * Decode comment from current source.
+     *
+     * @throws DecoderException
+     * @return array<string>
+     */
+    protected function decodeComments(): array
+    {
+        $comments = [];
+
+        do {
+            $byte = $this->nextByteOrFail();
+            $size = $this->decodeBlocksize($byte);
+            if ($size > 0) {
+                $comments[] = $this->nextBytesOrFail($size);
+            }
+        } while ($byte !== CommentExtension::TERMINATOR);
+
+        return $comments;
+    }
+
+    /**
+     * Decode blocksize of following comment.
+     *
+     * @throws DecoderException
+     */
+    protected function decodeBlocksize(string $byte): int
+    {
+        $unpacked = @unpack('C', $byte);
+
+        if ($unpacked === false || !array_key_exists(1, $unpacked)) {
+            throw new DecoderException('Failed to decode block size of comment extension');
+        }
+
+        return intval($unpacked[1]);
+    }
+}