diff --git a/CMakeLists.txt b/CMakeLists.txt
index 74a506a..2b75b11 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -45,6 +45,7 @@ add_executable(${PROJECT_NAME}
 	src/moversine.cpp
 	src/gameplaysceneclassic.cpp
 	src/moverrelative.cpp
+	src/inputbag.cpp
 )
 
 target_link_libraries(${PROJECT_NAME}
diff --git a/src/inputbag.cpp b/src/inputbag.cpp
new file mode 100644
index 0000000..e1cc74f
--- /dev/null
+++ b/src/inputbag.cpp
@@ -0,0 +1,69 @@
+#include "inputbag.hpp"
+#include "key.hpp"
+#include <vector>
+#include <map>
+#include <cassert>
+
+namespace cloonel {
+	struct Action {
+		Key key;
+		const std::string name;
+		InputBag::ActionStateType state;
+	};
+
+	struct InputBag::LocalData {
+		std::vector<Action> actions;
+		std::map<int, Action*> mappings;
+	};
+
+	namespace {
+		///----------------------------------------------------------------------
+		///When actions vector is reallocated, update pointers in mappings.
+		///----------------------------------------------------------------------
+		void UpdatePointers (Action* parOldAddrStart, Action* parNewAddress, std::map<int, Action*>& parUpdate, int parOffset) {
+			for (auto itMap : parUpdate) {
+				if (itMap.second >= parOldAddrStart) {
+					itMap.second = parNewAddress + (itMap.second - parOldAddrStart) + parOffset;
+				}
+			}
+		}
+	} //unnamed namespace
+
+	///--------------------------------------------------------------------------
+	///--------------------------------------------------------------------------
+	InputBag::InputBag() :
+		m_localdata(new LocalData)
+	{
+	}
+
+	///--------------------------------------------------------------------------
+	///--------------------------------------------------------------------------
+	InputBag::~InputBag() {
+	}
+
+	///--------------------------------------------------------------------------
+	///--------------------------------------------------------------------------
+	void InputBag::AddAction (int parAction, const Key& parKey, std::string&& parName) {
+		Action* const oldBuff = m_localdata->actions.data();
+		m_localdata->actions.push_back(Action({parKey, parName, ActionState_Released}));
+		Action* const newBuff = m_localdata->actions.data();
+		if (oldBuff != newBuff) {
+			UpdatePointers(oldBuff, newBuff, m_localdata->mappings, 0);
+		}
+		m_localdata->mappings[parAction] = &m_localdata->actions.back();
+	}
+
+	///--------------------------------------------------------------------------
+	///--------------------------------------------------------------------------
+	InputBag::ActionStateType InputBag::ActionState (int parAction) const {
+		assert(m_localdata->mappings.find(parAction) != m_localdata->mappings.end());
+		return m_localdata->mappings[parAction]->state;
+	}
+
+	///--------------------------------------------------------------------------
+	///--------------------------------------------------------------------------
+	void InputBag::Clear() {
+		m_localdata->actions.clear();
+		m_localdata->mappings.clear();
+	}
+} //namespace cloonel
diff --git a/src/inputbag.hpp b/src/inputbag.hpp
new file mode 100644
index 0000000..f1dbed4
--- /dev/null
+++ b/src/inputbag.hpp
@@ -0,0 +1,32 @@
+#ifndef idF4E67FC292A5480DA4305B806170F520
+#define idF4E67FC292A5480DA4305B806170F520
+
+#include <memory>
+
+namespace cloonel {
+	struct Key;
+
+	class InputBag {
+	public:
+		enum ActionStateType {
+			ActionState_Released,
+			ActionState_Pressed,
+			ActionState_JustPressed,
+			ActionState_JustReleased
+		};
+
+		InputBag ( void );
+		~InputBag ( void ) noexcept;
+
+		void AddAction ( int parAction, const Key& parKey, std::string&& parName );
+		ActionStateType ActionState ( int parAction ) const;
+		void Clear ( void );
+
+	private:
+		struct LocalData;
+
+		const std::unique_ptr<LocalData> m_localdata;
+	};
+} //namespace cloonel
+
+#endif
diff --git a/src/key.hpp b/src/key.hpp
new file mode 100644
index 0000000..0124df7
--- /dev/null
+++ b/src/key.hpp
@@ -0,0 +1,40 @@
+#ifndef id8F6145D6CFBA40338C5804DEC032CE16
+#define id8F6145D6CFBA40338C5804DEC032CE16
+
+#include <ciso646>
+
+namespace cloonel {
+	struct Key {
+		enum KeyDevice {
+			KeyDevice_Keyboard
+		};
+
+		Key ( void ) = default;
+		Key ( KeyDevice parDev, int parScancode, const char parLabel[4] ) :
+			srcdevice(parDev),
+			scancode(parScancode)
+		{
+			label[0] = parLabel[0];
+			label[1] = parLabel[1];
+			label[2] = parLabel[2];
+			label[3] = parLabel[3];
+		}
+		~Key ( void ) noexcept = default;
+
+		bool operator== ( const Key& parOther ) const {
+			return srcdevice == parOther.srcdevice and scancode == parOther.srcdevice;
+		}
+		bool operator!= ( const Key& parOther ) const {
+			return not this->operator==(parOther);
+		}
+		bool operator< ( const Key& parOther ) const {
+			return (srcdevice == parOther.srcdevice and scancode < parOther.scancode) or (srcdevice < parOther.srcdevice);
+		}
+
+		KeyDevice srcdevice;
+		int scancode;
+		char label[4];
+	};
+} //namespace cloonel
+
+#endif