--- a/lib/Protobuf-PHP/library/DrSlump/Protobuf.php
+++ b/lib/Protobuf-PHP/library/DrSlump/Protobuf.php
@@ -1,1 +1,167 @@
+<?php
 
+namespace DrSlump;
+
+use DrSlump\Protobuf;
+
+class Protobuf
+{
+    const VERSION = '@package_version@';
+
+    const RULE_OPTIONAL = 1;
+    const RULE_REQUIRED = 2;
+    const RULE_REPEATED = 3;
+    const RULE_UNKNOWN  = -1;
+
+    const TYPE_DOUBLE   = 1;
+    const TYPE_FLOAT    = 2;
+    const TYPE_INT64    = 3;
+    const TYPE_UINT64   = 4;
+    const TYPE_INT32    = 5;
+    const TYPE_FIXED64  = 6;
+    const TYPE_FIXED32  = 7;
+    const TYPE_BOOL     = 8;
+    const TYPE_STRING   = 9;
+    const TYPE_GROUP    = 10;
+    const TYPE_MESSAGE  = 11;
+    const TYPE_BYTES    = 12;
+    const TYPE_UINT32   = 13;
+    const TYPE_ENUM     = 14;
+    const TYPE_SFIXED32 = 15;
+    const TYPE_SFIXED64 = 16;
+    const TYPE_SINT32   = 17;
+    const TYPE_SINT64   = 18;
+    const TYPE_UNKNOWN  = -1;
+
+
+    static protected $codecs = array();
+
+
+    /**
+     * Setup SPL autoloader for Protobuf library classes
+     *
+     * @static
+     * @return void
+     */
+    static public function autoload()
+    {
+        spl_autoload_register(function($class){
+            $prefix = __CLASS__ . '\\';
+            if (strpos($class, $prefix) === 0) {
+                // Remove vendor from name
+                $class = substr($class, strlen(__NAMESPACE__)+1);
+                // Convert namespace separator to directory ones
+                $class = str_replace('\\', DIRECTORY_SEPARATOR, $class);
+                // Prefix with this file's directory
+                $class = __DIR__ . DIRECTORY_SEPARATOR . $class;
+
+                include($class . '.php');
+                return true;
+            }
+
+            return false;
+        });
+    }
+
+    /**
+     * Obtain an instance of the descriptor's registry
+     *
+     * @static
+     * @return Protobuf\Registry
+     */
+    static public function getRegistry()
+    {
+        static $registry = NULL;
+
+        if (NULL === $registry) {
+            $registry = new Protobuf\Registry();
+        }
+
+        return $registry;
+    }
+
+
+    static public function getCodec($codec = null)
+    {
+        if ($codec instanceof Protobuf\CodecInterface) {
+            return $codec;
+        }
+
+        // Bootstrap the library's default codec if none is available
+        if (!isset(self::$codecs['default'])) {
+            $default = new Protobuf\Codec\Binary();
+            self::registerCodec('default', $default);
+            self::registerCodec('binary', $default);
+        }
+
+        if (is_string($codec)) {
+            $codec = strtolower($codec);
+            if (!isset(self::$codecs[$codec])) {
+                throw new Protobuf\Exception('No codec found by name "' . $codec . '"');
+            }
+            return self::$codecs[$codec];
+        }
+
+        return self::getCodec('default');
+    }
+
+    static public function setDefaultCodec($codec)
+    {
+        if (is_string($codec)) {
+            $codec = self::getCodec($codec);
+        }
+
+        if ($codec instanceof Protobuf\CodecInterface) {
+            self::registerCodec('default', $codec);
+        } else {
+            throw new Protobuf\Exception('Codec must implement DrSlump\Protobuf\CodecInterface');
+        }
+    }
+
+    static public function registerCodec($name, Protobuf\CodecInterface $codec)
+    {
+        $name = strtolower($name);
+        self::$codecs[$name] = $codec;
+    }
+
+    static public function unregisterCodec($name)
+    {
+        $name = strtolower($name);
+        if (isset(self::$codecs[$name])) {
+            unset(self::$codecs[$name]);
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Encodes a message using the default codec
+     *
+     * @static
+     * @param \DrSlump\Protobuf\Message $message
+     * @return string
+     */
+    static public function encode(Protobuf\Message $message)
+    {
+        $codec = self::getCodec();
+        return $codec->encode($message);
+    }
+
+    /**
+     * @static
+     * @param String|Message $message
+     * @param String $data
+     * @return \DrSlump\Protobuf\Message
+     */
+    static public function decode($message, $data)
+    {
+        if (is_string($message)) {
+            $message = '\\' . ltrim($message, '\\');
+            $message = new $message;
+        }
+
+        $codec = self::getCodec();
+        return $codec->decode($message, $data);
+    }
+}
+