From d45dad482dc19b31a2e37c9e30fd70eddaf10b20 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Isma=C3=AFl=20Dogru?= <is.dogru@gmail.com>
Date: Fri, 22 May 2026 14:30:47 +0100
Subject: [PATCH] Add ng-input.h with edge-detect helpers around
 bios_p1current/change
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Three static inline helpers (ng_p1_held / pressed / released) wrap
the standard BIOS input convention so it's named in one place.

Signed-off-by: Ismaïl Dogru <is.dogru@gmail.com>
---
 include/ngdevkit/ng-input.h | 51 +++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 include/ngdevkit/ng-input.h

diff --git a/include/ngdevkit/ng-input.h b/include/ngdevkit/ng-input.h
new file mode 100644
index 0000000..1807a05
--- /dev/null
+++ b/include/ngdevkit/ng-input.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2026 Ismaïl Dogru
+ * This file is part of ngdevkit
+ *
+ * ngdevkit is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * ngdevkit is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with ngdevkit.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __NGDEVKIT_NG_INPUT_H__
+#define __NGDEVKIT_NG_INPUT_H__
+
+#include <ngdevkit/bios-ram.h>
+#include <ngdevkit/types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/// True while any bit in mask is currently held on player 1
+static inline u8 ng_p1_held(u8 mask)
+{
+    return (bios_p1current & mask) != 0;
+}
+
+/// True on the single frame any bit in mask transitions released -> held
+static inline u8 ng_p1_pressed(u8 mask)
+{
+    return (bios_p1current & ~bios_p1previous & mask) != 0;
+}
+
+/// True on the single frame any bit in mask transitions held -> released
+static inline u8 ng_p1_released(u8 mask)
+{
+    return (bios_p1previous & ~bios_p1current & mask) != 0;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __NGDEVKIT_NG_INPUT_H__ */