From 61ea8f83377952a8ca8e1cb5cf8ec1099ca8369f Mon Sep 17 00:00:00 2001
From: bruvzg <7645683+bruvzg@users.noreply.github.com>
Date: Mon, 10 Jan 2022 13:43:44 +0200
Subject: [PATCH] Add joystick button index boundary check. Increase max.
 button number to 128 (max. buttons supported by DirectInput).

---
 core/input/input.cpp         | 3 ++-
 core/input/input_enums.h     | 2 +-
 doc/classes/@GlobalScope.xml | 7 +++++--
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/core/input/input.cpp b/core/input/input.cpp
index c5540f926df..507a686cab1 100644
--- a/core/input/input.cpp
+++ b/core/input/input.cpp
@@ -892,7 +892,8 @@ void Input::set_event_dispatch_function(EventDispatchFunc p_function) {
 void Input::joy_button(int p_device, JoyButton p_button, bool p_pressed) {
 	_THREAD_SAFE_METHOD_;
 	Joypad &joy = joy_names[p_device];
-	//printf("got button %i, mapping is %i\n", p_button, joy.mapping);
+	ERR_FAIL_INDEX((int)p_button, (int)JoyButton::MAX);
+
 	if (joy.last_buttons[(size_t)p_button] == p_pressed) {
 		return;
 	}
diff --git a/core/input/input_enums.h b/core/input/input_enums.h
index aa55316ec87..0282de21760 100644
--- a/core/input/input_enums.h
+++ b/core/input/input_enums.h
@@ -83,7 +83,7 @@ enum class JoyButton {
 	PADDLE4 = 19,
 	TOUCHPAD = 20,
 	SDL_MAX = 21,
-	MAX = 36, // Android supports up to 36 buttons.
+	MAX = 128, // Android supports up to 36 buttons. DirectInput supports up to 128 buttons.
 };
 
 enum class MIDIMessage {
diff --git a/doc/classes/@GlobalScope.xml b/doc/classes/@GlobalScope.xml
index 20a371c3d0e..be7ac1164e8 100644
--- a/doc/classes/@GlobalScope.xml
+++ b/doc/classes/@GlobalScope.xml
@@ -2134,8 +2134,11 @@
 		<constant name="JOY_BUTTON_SDL_MAX" value="21" enum="JoyButton">
 			The number of SDL game controller buttons.
 		</constant>
-		<constant name="JOY_BUTTON_MAX" value="36" enum="JoyButton">
-			The maximum number of game controller buttons: Android supports up to 36 buttons.
+		<constant name="JOY_BUTTON_MAX" value="128" enum="JoyButton">
+			The maximum number of game controller buttons supported by the engine. The actual limit may be lower on specific platforms:
+			- Android: Up to 36 buttons.
+			- Linux: Up to 80 buttons.
+			- Windows and macOS: Up to 128 buttons.
 		</constant>
 		<constant name="JOY_AXIS_INVALID" value="-1" enum="JoyAxis">
 			An invalid game controller axis.