From 0f24863561b7c609395b59ab73e634509d3111d8 Mon Sep 17 00:00:00 2001
From: Hannes Schulze <haschu0103@outlook.de>
Date: Thu, 23 Jan 2025 22:10:55 +0100
Subject: copy reference implementation

---
 lib/nes/ref/controller.cc | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 lib/nes/ref/controller.cc

(limited to 'lib/nes/ref/controller.cc')

diff --git a/lib/nes/ref/controller.cc b/lib/nes/ref/controller.cc
new file mode 100644
index 0000000..70d6ba2
--- /dev/null
+++ b/lib/nes/ref/controller.cc
@@ -0,0 +1,18 @@
+#include "nes/ref/controller.hh"
+
+namespace nes::ref
+{
+	auto controller::read() -> std::uint8_t
+	{
+		auto const res = index_ < 8 ? (pressed_.get_raw_value() >> index_) & 1 : 0;
+		index_ += 1;
+		if (strobing_) { index_ = 0; }
+		return static_cast<std::uint8_t>(res);
+	}
+
+	auto controller::write(std::uint8_t const value) -> void
+	{
+		strobing_ = value & 1;
+		if (strobing_) { index_ = 0; }
+	}
+} // namespace nes::ref
\ No newline at end of file
-- 
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