Completely rewritten code.

Implement read-only zip file - class \PhpZip\ZipFile, create and update zip file - \PhpZip\ZipOutputFile.
Supports ZIP64 ext, Traditional PKWARE Encryption, WinZip AES Encryption.

src/PhpZip/Mapper/PositionMapper.php

@@ -0,0 +1,29 @@
+<?php
+namespace PhpZip\Mapper;
+
+/**
+ * Maps a given position.
+ *
+ * @author Ne-Lexa alexey@nelexa.ru
+ * @license MIT
+ */
+class PositionMapper
+{
+    /**
+     * @param int $position
+     * @return int
+     */
+    public function map($position)
+    {
+        return $position;
+    }
+
+    /**
+     * @param int $position
+     * @return int
+     */
+    public function unmap($position)
+    {
+        return $position;
+    }
+}