handle input devices in the c++ application

1 files changed, 44 insertions, 0 deletions

diff --git a/lib/nes/app/input/input-device.hh b/lib/nes/app/input/input-device.hh
new file mode 100644
index 0000000..9ac7423
--- /dev/null
+++ b/lib/nes/app/input/input-device.hh
@@ -0,0 +1,44 @@
+#pragma once
+
+#include "nes/sys/types/button-mask.hh"
+
+namespace nes
+{
+	/// An abstract input device which can be used to play games.
+	class input_device
+	{
+	public:
+		virtual ~input_device() = default;
+
+		input_device(input_device const&) = delete;
+		input_device(input_device&&) = delete;
+		auto operator=(input_device const&) -> input_device& = delete;
+		auto operator=(input_device&&) -> input_device& = delete;
+
+		virtual auto read_key_up() -> bool = 0;
+		virtual auto read_key_down() -> bool = 0;
+		virtual auto read_key_left() -> bool = 0;
+		virtual auto read_key_right() -> bool = 0;
+		virtual auto read_key_a() -> bool = 0;
+		virtual auto read_key_b() -> bool = 0;
+		virtual auto read_key_select() -> bool = 0;
+		virtual auto read_key_start() -> bool = 0;
+
+		auto read_mask() -> button_mask
+		{
+			auto res = button_mask{};
+			if (read_key_up()) { res.add(buttons::up); }
+			if (read_key_down()) { res.add(buttons::down); }
+			if (read_key_left()) { res.add(buttons::left); }
+			if (read_key_right()) { res.add(buttons::right); }
+			if (read_key_a()) { res.add(buttons::a); }
+			if (read_key_b()) { res.add(buttons::b); }
+			if (read_key_select()) { res.add(buttons::select); }
+			if (read_key_start()) { res.add(buttons::start); }
+			return res;
+		}
+
+	protected:
+		explicit input_device() = default;
+	};
+} // namespace nes
\ No newline at end of file