commit vendor

vendor/laminas/laminas-mail/src/Header/HeaderName.php

@@ -0,0 +1,73 @@
+<?php
+
+/**
+ * @see       https://github.com/laminas/laminas-mail for the canonical source repository
+ * @copyright https://github.com/laminas/laminas-mail/blob/master/COPYRIGHT.md
+ * @license   https://github.com/laminas/laminas-mail/blob/master/LICENSE.md New BSD License
+ */
+
+namespace Laminas\Mail\Header;
+
+final class HeaderName
+{
+    /**
+     * No public constructor.
+     */
+    private function __construct()
+    {
+    }
+
+    /**
+     * Filter the header name according to RFC 2822
+     *
+     * @see    http://www.rfc-base.org/txt/rfc-2822.txt (section 2.2)
+     * @param  string $name
+     * @return string
+     */
+    public static function filter($name)
+    {
+        $result = '';
+        $tot    = strlen($name);
+        for ($i = 0; $i < $tot; $i += 1) {
+            $ord = ord($name[$i]);
+            if ($ord > 32 && $ord < 127 && $ord !== 58) {
+                $result .= $name[$i];
+            }
+        }
+        return $result;
+    }
+
+    /**
+     * Determine if the header name contains any invalid characters.
+     *
+     * @param string $name
+     * @return bool
+     */
+    public static function isValid($name)
+    {
+        $tot = strlen($name);
+        for ($i = 0; $i < $tot; $i += 1) {
+            $ord = ord($name[$i]);
+            if ($ord < 33 || $ord > 126 || $ord === 58) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    /**
+     * Assert that the header name is valid.
+     *
+     * Raises an exception if invalid.
+     *
+     * @param string $name
+     * @throws Exception\RuntimeException
+     * @return void
+     */
+    public static function assertValid($name)
+    {
+        if (! self::isValid($name)) {
+            throw new Exception\RuntimeException('Invalid header name detected');
+        }
+    }
+}