From 5e11ee1c46f6b59d26fed43109213a47e678d96f Mon Sep 17 00:00:00 2001
From: jwellbelove <github@wellbelove.co.uk>
Date: Mon, 8 Dec 2014 20:10:13 +0000
Subject: [PATCH] Added error handler functionality

---
 error_handler.cpp | 57 ++++++++++++++++++++++++++++++++
 error_handler.h   | 83 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 140 insertions(+)
 create mode 100644 error_handler.cpp
 create mode 100644 error_handler.h

diff --git a/error_handler.cpp b/error_handler.cpp
new file mode 100644
index 00000000..84ee431e
--- /dev/null
+++ b/error_handler.cpp
@@ -0,0 +1,57 @@
+///\file
+
+/******************************************************************************
+The MIT License(MIT)
+
+Embedded Template Library.
+
+Copyright(c) 2014 jwellbelove
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files(the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions :
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+******************************************************************************/
+
+#include "error_handler.h"
+#include "nullptr.h"
+
+//*****************************************************************************
+/// The error function callback pointer.
+//*****************************************************************************
+etl::ifunction<const etl::exception&>* etl::error_handler::p_ifunction = nullptr;
+
+//*****************************************************************************
+/// Sets the error callback function.
+///\param f A reference to an etl::function object that will handler errors.
+//*****************************************************************************
+void etl::error_handler::set_callback(ifunction<const etl::exception&>& f)
+{
+  p_ifunction = &f;
+}
+
+//*****************************************************************************
+/// Sends the exception error to the user's handler function.
+///\param e The exception error.
+//*****************************************************************************
+void etl::error_handler::error(const etl::exception& e)
+{
+  if (p_ifunction != nullptr)
+  {
+    (*p_ifunction)(e);
+  }
+}
+
diff --git a/error_handler.h b/error_handler.h
new file mode 100644
index 00000000..2fa71698
--- /dev/null
+++ b/error_handler.h
@@ -0,0 +1,83 @@
+
+///\file
+
+/******************************************************************************
+The MIT License(MIT)
+
+Embedded Template Library.
+
+Copyright(c) 2014 jwellbelove
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files(the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions :
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+******************************************************************************/
+
+#ifndef __ETL_ERROR_HANDLER__
+#define __ETL_ERROR_HANDLER__
+
+///\defgroup error_handler error_handler
+/// Error handler for when throwing exceptions is not required.
+///\ingroup utilities
+
+#include "exception.h"
+#include "function.h"
+
+namespace etl
+{
+  //***************************************************************************
+  /// Error handler for when throwing exceptions is not required.
+  ///\ingroup error_handler
+  //***************************************************************************
+  class error_handler
+  {
+  public:
+
+    //*************************************************************************
+    /// Callback class for free handler functions.
+    //*************************************************************************
+    struct free_function : public function<void, const exception&>
+    {
+      free_function(void (*p_function)(const exception&))
+        : function<void, const exception&>(p_function)
+      {
+      }
+    };
+
+    //*************************************************************************
+    /// Callback class for member handler functions.
+    //*************************************************************************
+    template <typename TObject>
+    struct member_function : public function<TObject, const exception&>
+    {
+      member_function(TObject& object, void(TObject::*p_function)(const exception&))
+        : function<TObject, const exception&>(object, p_function)
+      {
+      }
+    };
+
+    static void set_callback(ifunction<const exception&>& f);
+    static void error(const exception& e);
+
+  private:
+
+    static ifunction<const exception&>* p_ifunction;
+  };
+}
+
+#endif
+