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diff --git a/src/nativefunction.h b/src/nativefunction.h
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+/**
+ *  NativeFunction.h
+ *
+ *  The NativeFunction class is an extension of the Function class that
+ *  forwards the function call directly to a native function in C/C++
+ *
+ *  @author Emiel Bruijntjes <emiel.bruijntjes@copernica.com>
+ *  @copyright 2013 Copernica BV
+ */
+
+/**
+ *  Set up namespace
+ */
+namespace Php {
+
+/**
+ *  Class definition
+ */
+class NativeFunction : public Function
+{
+public:
+    /**
+     *  Constructor
+     *  @param  function
+     */
+    NativeFunction(native_callback_0 function) : _type(0) { _function.f0 = function; }
+    NativeFunction(native_callback_1 function) : _type(1) { _function.f1 = function; }
+    NativeFunction(native_callback_2 function) : _type(2) { _function.f2 = function; }
+    NativeFunction(native_callback_3 function) : _type(3) { _function.f3 = function; }
+    NativeFunction(native_callback_4 function) : _type(4) { _function.f4 = function; }
+    NativeFunction(native_callback_5 function) : _type(5) { _function.f5 = function; }
+    NativeFunction(native_callback_6 function) : _type(6) { _function.f6 = function; }
+    NativeFunction(native_callback_7 function) : _type(7) { _function.f7 = function; }
+
+    /**
+     *  Destructor
+     */
+    virtual ~NativeFunction() {}
+
+    /**
+     *  Method that gets called every time the function is executed
+     *  @param  request     Request environment
+     *  @param  params      The parameters that were passed
+     *  @return Variable    Return value
+     */
+    virtual Value invoke(Request &request, Parameters &params)
+    {
+        switch (_type) {
+        case 0:     _function.f0(); return Value();
+        case 1:     _function.f1(params); return Value();
+        case 2:     _function.f2(request); return Value();
+        case 3:     _function.f3(request, params); return Value();
+        case 4:     return _function.f4();
+        case 5:     return _function.f5(params);
+        case 6:     return _function.f6(request);
+        case 7:     return _function.f7(request, params);
+        default:    return Value();
+        }
+    }
+
+private:
+    /**
+     *  Union of supported callbacks
+     *  One of the callbacks will be set 
+     */
+    union {
+        native_callback_0 f0;
+        native_callback_1 f1;
+        native_callback_2 f2;
+        native_callback_3 f3;
+        native_callback_4 f4;
+        native_callback_5 f5;
+        native_callback_6 f6;
+        native_callback_7 f7;
+    } _function;
+    
+    /**
+     *  The callback that is set
+     *  @var integer
+     */
+    int _type;
+};
+
+/**
+ *  End of namespace
+ */
+}
+