Moved cache drivers outside core to extensions (plugins)

plugins/cache-redis/Predis/Protocol/Text/Handler/IntegerResponse.php

@@ -0,0 +1,45 @@
+<?php
+
+/*
+ * This file is part of the Predis package.
+ *
+ * (c) Daniele Alessandri <suppakilla@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Predis\Protocol\Text\Handler;
+
+use Predis\CommunicationException;
+use Predis\Connection\CompositeConnectionInterface;
+use Predis\Protocol\ProtocolException;
+
+/**
+ * Handler for the integer response type in the standard Redis wire protocol.
+ * It translates the payload an integer or NULL.
+ *
+ * @link http://redis.io/topics/protocol
+ *
+ * @author Daniele Alessandri <suppakilla@gmail.com>
+ */
+class IntegerResponse implements ResponseHandlerInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function handle(CompositeConnectionInterface $connection, $payload)
+    {
+        if (is_numeric($payload)) {
+            return (int) $payload;
+        }
+
+        if ($payload !== 'nil') {
+            CommunicationException::handle(new ProtocolException(
+                $connection, "Cannot parse '$payload' as a valid numeric response."
+            ));
+        }
+
+        return;
+    }
+}