Fix various compatibility issues with PHP 8

libs/swiftmailer/classes/Swift/Mime/ContentEncoder/RawContentEncoder.php

@@ -0,0 +1,64 @@
+<?php
+
+/*
+ * This file is part of SwiftMailer.
+ * (c) 2004-2009 Chris Corbyn
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Handles raw Transfer Encoding in Swift Mailer.
+ *
+ *
+ * @author Sebastiaan Stok <s.stok@rollerscapes.net>
+ */
+class Swift_Mime_ContentEncoder_RawContentEncoder implements Swift_Mime_ContentEncoder
+{
+    /**
+     * Encode a given string to produce an encoded string.
+     *
+     * @param string $string
+     * @param int    $firstLineOffset ignored
+     * @param int    $maxLineLength   ignored
+     *
+     * @return string
+     */
+    public function encodeString($string, $firstLineOffset = 0, $maxLineLength = 0)
+    {
+        return $string;
+    }
+
+    /**
+     * Encode stream $in to stream $out.
+     *
+     * @param Swift_OutputByteStream $in
+     * @param Swift_InputByteStream  $out
+     * @param int                    $firstLineOffset ignored
+     * @param int                    $maxLineLength   ignored
+     */
+    public function encodeByteStream(Swift_OutputByteStream $os, Swift_InputByteStream $is, $firstLineOffset = 0, $maxLineLength = 0)
+    {
+        while (false !== ($bytes = $os->read(8192))) {
+            $is->write($bytes);
+        }
+    }
+
+    /**
+     * Get the name of this encoding scheme.
+     *
+     * @return string
+     */
+    public function getName()
+    {
+        return 'raw';
+    }
+
+    /**
+     * Not used.
+     */
+    public function charsetChanged($charset)
+    {
+    }
+}