cp866 to utf8 converter

src/PhpZip/Stream/ZipInputStream.php

@@ -311,7 +311,7 @@ class ZipInputStream implements ZipInputStreamInterface
             fread($this->in, 42)
         );
 
-//        $utf8 = 0 !== ($data['gpbf'] & self::GPBF_UTF8);
+//        $utf8 = ($data['gpbf'] & ZipEntry::GPBF_UTF8) !== 0;
 
         // See appendix D of PKWARE's ZIP File Format Specification.
         $name = fread($this->in, $data['fileLength']);

src/PhpZip/Util/StringUtil.php

@@ -28,4 +28,29 @@ class StringUtil
         return $needle === "" || (($temp = strlen($haystack) - strlen($needle)) >= 0
                 && strpos($haystack, $needle, $temp) !== false);
     }
+
+    /**
+     * @param string $str
+     * @return string
+     */
+    public static function cp866toUtf8($str)
+    {
+        if (function_exists('iconv')) {
+            /** @noinspection PhpComposerExtensionStubsInspection */
+            return iconv('CP866', 'UTF-8//IGNORE', $str);
+        } elseif (function_exists('mb_convert_encoding')) {
+            /** @noinspection PhpComposerExtensionStubsInspection */
+            return mb_convert_encoding($str, 'UTF-8', 'CP866');
+        } elseif (class_exists('UConverter')) {
+            /** @noinspection PhpComposerExtensionStubsInspection */
+            $converter = new \UConverter('UTF-8', 'CP866');
+            return $converter->convert($str, false);
+        } else {
+            static $cp866Utf8Pairs;
+            if (empty($cp866Utf8Pairs)) {
+                $cp866Utf8Pairs = require __DIR__ . '/encodings/cp866-utf8.php';
+            }
+            return strtr($str, $cp866Utf8Pairs);
+        }
+    }
 }