Add IInputSystem and IInputInternal interfaces.

Signed-off-by: aixxe <me@aixxe.net>

include/cstrike/Interfaces/IInputInternal.h

@@ -0,0 +1,21 @@
+#pragma once
+
+typedef ButtonCode_t KeyCode;
+typedef ButtonCode_t MouseCode;
+
+enum MouseCodeState_t {
+	BUTTON_RELEASED = 0,
+	BUTTON_PRESSED,
+	BUTTON_DOUBLECLICKED
+};
+
+class IInputInternal {
+	public:
+		void SetKeyCodeState(KeyCode code, bool pressed) {
+			GetVirtualFunction<void(*)(IInputInternal*, KeyCode, bool)>(this, 83)(this, code, pressed);
+		}
+
+		void SetMouseCodeState(MouseCode code, MouseCodeState_t state) {
+			GetVirtualFunction<void(*)(IInputInternal*, MouseCode, MouseCodeState_t)>(this, 84)(this, code, state);
+		}
+};

include/cstrike/Interfaces/IInputSystem.h

@@ -0,0 +1,10 @@
+#pragma once
+
+enum ButtonCode_t;
+
+class IInputSystem {
+	public:
+		bool IsButtonDown(ButtonCode_t button) {
+			return GetVirtualFunction<bool(*)(void*, ButtonCode_t)>(this, 11)(this, button);
+		}
+};