1 files changed, 41 insertions, 0 deletions
diff --git a/lib/nes/app/input/input-buffer.hh b/lib/nes/app/input/input-buffer.hh
new file mode 100644
index 0000000..68fca6b
--- /dev/null
+++ b/lib/nes/app/input/input-buffer.hh
@@ -0,0 +1,41 @@
+#pragma once
+
+#include "nes/app/input/key.hh"
+#include "nes/common/list.hh"
+
+namespace nes::app
+{
+	class input_event;
+
+	class input_buffer
+	{
+		struct event final : list<event>::node
+		{
+			bool pressed{ false };
+		};
+
+		event key_events_[key_count]{};
+		list<event> event_queue_;
+
+	public:
+		explicit input_buffer() = default;
+
+		input_buffer(input_buffer const&) = delete;
+		input_buffer(input_buffer&&) = delete;
+		auto operator=(input_buffer const&) -> input_buffer& = delete;
+		auto operator=(input_buffer&&) -> input_buffer& = delete;
+
+		/// Record a key-down event.
+		auto key_down(key) -> void;
+		/// Record a key-up event.
+		auto key_up(key) -> void;
+
+		auto read_key(key) -> bool;
+		auto poll_event() -> input_event;
+
+	private:
+		auto get_event(key) -> event&;
+		auto get_key(event const&) -> key;
+		auto set_pressed(key, bool) -> void;
+	};
+} // namespace nes::app
+\ No newline at end of file