kc3-lang/SDL

diff --git a/CMakeLists.txt b/CMakeLists.txt
index dd131af..badb861 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2783,6 +2783,13 @@ elseif(N3DS)
     set(HAVE_SDL_TIMERS TRUE)
   endif()
 
+  if(SDL_SENSOR)
+    set(SDL_SENSOR_N3DS 1)
+    file(GLOB N3DS_SENSOR_SOURCES ${SDL2_SOURCE_DIR}/src/sensor/n3ds/*.c)
+    list(APPEND SOURCE_FILES ${N3DS_SENSOR_SOURCES})
+    set(HAVE_SDL_SENSORS TRUE)
+  endif()
+
   if(SDL_VIDEO)
     set(SDL_VIDEO_DRIVER_N3DS 1)
     file(GLOB N3DS_VIDEO_SOURCES ${SDL2_SOURCE_DIR}/src/video/n3ds/*.c)
diff --git a/include/SDL_config.h.cmake b/include/SDL_config.h.cmake
index 6dc89a4..6daeadf 100644
--- a/include/SDL_config.h.cmake
+++ b/include/SDL_config.h.cmake
@@ -365,6 +365,7 @@
 #cmakedefine SDL_SENSOR_WINDOWS @SDL_SENSOR_WINDOWS@
 #cmakedefine SDL_SENSOR_DUMMY @SDL_SENSOR_DUMMY@
 #cmakedefine SDL_SENSOR_VITA @SDL_SENSOR_VITA@
+#cmakedefine SDL_SENSOR_N3DS @SDL_SENSOR_N3DS@
 
 /* Enable various shared object loading systems */
 #cmakedefine SDL_LOADSO_DLOPEN @SDL_LOADSO_DLOPEN@
diff --git a/src/joystick/n3ds/SDL_sysjoystick.c b/src/joystick/n3ds/SDL_sysjoystick.c
index 3f2d5a2..1b98462 100644
--- a/src/joystick/n3ds/SDL_sysjoystick.c
+++ b/src/joystick/n3ds/SDL_sysjoystick.c
@@ -51,23 +51,17 @@ typedef struct N3DSJoystickState
     u32 kUp;
     circlePosition circlePos;
     circlePosition cStickPos;
-    accelVector acceleration;
-    angularRate rate;
 } N3DSJoystickState;
 
 SDL_FORCE_INLINE void UpdateAxis(SDL_Joystick *joystick, N3DSJoystickState *previous_state);
 SDL_FORCE_INLINE void UpdateButtons(SDL_Joystick *joystick, N3DSJoystickState *previous_state);
-SDL_FORCE_INLINE void UpdateSensors(SDL_Joystick *joystick, N3DSJoystickState *previous_state);
 
 static N3DSJoystickState current_state;
-static SDL_bool sensors_enabled = SDL_FALSE;
 
 static int
 N3DS_JoystickInit(void)
 {
     hidInit();
-    HIDUSER_EnableAccelerometer();
-    HIDUSER_EnableGyroscope();
     return 0;
 }
 
@@ -104,17 +98,13 @@ N3DS_JoystickOpen(SDL_Joystick *joystick, int device_index)
     joystick->nhats = 0;
     joystick->instance_id = device_index;
 
-    SDL_PrivateJoystickAddSensor(joystick, SDL_SENSOR_ACCEL, 0.0f);
-    SDL_PrivateJoystickAddSensor(joystick, SDL_SENSOR_GYRO, 0.0f);
-
     return 0;
 }
 
 static int
 N3DS_JoystickSetSensorsEnabled(SDL_Joystick *joystick, SDL_bool enabled)
 {
-    sensors_enabled = enabled;
-    return 0;
+    return SDL_Unsupported();
 }
 
 static void
@@ -124,10 +114,6 @@ N3DS_JoystickUpdate(SDL_Joystick *joystick)
 
     UpdateAxis(joystick, &previous_state);
     UpdateButtons(joystick, &previous_state);
-
-    if (sensors_enabled) {
-        UpdateSensors(joystick, &previous_state);
-    }
 }
 
 SDL_FORCE_INLINE void
@@ -184,30 +170,6 @@ UpdateButtons(SDL_Joystick *joystick, N3DSJoystickState *previous_state)
     }
 }
 
-SDL_FORCE_INLINE void
-UpdateSensors(SDL_Joystick *joystick, N3DSJoystickState *previous_state)
-{
-    float data[3];
-
-    hidAccelRead(&current_state.acceleration);
-    if (SDL_memcmp(&previous_state->acceleration, &current_state.acceleration, sizeof(accelVector)) != 0) {
-        SDL_memcpy(&previous_state->acceleration, &current_state.acceleration, sizeof(accelVector));
-        data[0] = (float) current_state.acceleration.x * SDL_STANDARD_GRAVITY;
-        data[1] = (float) current_state.acceleration.y * SDL_STANDARD_GRAVITY;
-        data[2] = (float) current_state.acceleration.z * SDL_STANDARD_GRAVITY;
-        SDL_PrivateJoystickSensor(joystick, SDL_SENSOR_ACCEL, data, sizeof data);
-    }
-
-    hidGyroRead(&current_state.rate);
-    if (SDL_memcmp(&previous_state->rate, &current_state.rate, sizeof(angularRate)) != 0) {
-        SDL_memcpy(&previous_state->rate, &current_state.rate, sizeof(angularRate));
-        data[0] = (float) current_state.rate.y;
-        data[1] = (float) current_state.rate.z;
-        data[2] = (float) current_state.rate.x;
-        SDL_PrivateJoystickSensor(joystick, SDL_SENSOR_GYRO, data, sizeof data);
-    }
-}
-
 static void
 N3DS_JoystickClose(SDL_Joystick *joystick)
 {
@@ -216,8 +178,6 @@ N3DS_JoystickClose(SDL_Joystick *joystick)
 static void
 N3DS_JoystickQuit(void)
 {
-    HIDUSER_DisableGyroscope();
-    HIDUSER_DisableAccelerometer();
     hidExit();
 }
 
diff --git a/src/sensor/SDL_sensor.c b/src/sensor/SDL_sensor.c
index ba86528..6db4c63 100644
--- a/src/sensor/SDL_sensor.c
+++ b/src/sensor/SDL_sensor.c
@@ -41,12 +41,15 @@ static SDL_SensorDriver *SDL_sensor_drivers[] = {
 #ifdef SDL_SENSOR_WINDOWS
     &SDL_WINDOWS_SensorDriver,
 #endif
+#ifdef SDL_SENSOR_VITA
+    &SDL_VITA_SensorDriver,
+#endif
+#ifdef SDL_SENSOR_N3DS
+    &SDL_N3DS_SensorDriver,
+#endif
 #if defined(SDL_SENSOR_DUMMY) || defined(SDL_SENSOR_DISABLED)
     &SDL_DUMMY_SensorDriver
 #endif
-#if defined(SDL_SENSOR_VITA)
-    &SDL_VITA_SensorDriver
-#endif
 };
 static SDL_Sensor *SDL_sensors = NULL;
 static SDL_bool SDL_updating_sensor = SDL_FALSE;
diff --git a/src/sensor/SDL_syssensor.h b/src/sensor/SDL_syssensor.h
index 6e601a2..30d4400 100644
--- a/src/sensor/SDL_syssensor.h
+++ b/src/sensor/SDL_syssensor.h
@@ -102,6 +102,7 @@ extern SDL_SensorDriver SDL_COREMOTION_SensorDriver;
 extern SDL_SensorDriver SDL_WINDOWS_SensorDriver;
 extern SDL_SensorDriver SDL_DUMMY_SensorDriver;
 extern SDL_SensorDriver SDL_VITA_SensorDriver;
+extern SDL_SensorDriver SDL_N3DS_SensorDriver;
 
 #endif /* SDL_syssensor_h_ */
 
diff --git a/src/sensor/n3ds/SDL_n3dssensor.c b/src/sensor/n3ds/SDL_n3dssensor.c
new file mode 100644
index 0000000..7204fcc
--- /dev/null
+++ b/src/sensor/n3ds/SDL_n3dssensor.c
@@ -0,0 +1,218 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "../../SDL_internal.h"
+
+#ifdef SDL_SENSOR_N3DS
+
+#include <3ds.h>
+
+#include "../SDL_syssensor.h"
+
+/* 1 accelerometer and 1 gyroscope */
+#define N3DS_SENSOR_COUNT 2
+
+typedef struct
+{
+    SDL_SensorType type;
+    SDL_SensorID instance_id;
+} SDL_N3DSSensor;
+
+static SDL_N3DSSensor N3DS_sensors[N3DS_SENSOR_COUNT];
+
+SDL_FORCE_INLINE int InitN3DSServices(void);
+SDL_FORCE_INLINE void UpdateN3DSAccelerometer(SDL_Sensor *sensor);
+SDL_FORCE_INLINE void UpdateN3DSGyroscope(SDL_Sensor *sensor);
+
+SDL_FORCE_INLINE SDL_bool
+IsDeviceIndexValid(int device_index)
+{
+    return device_index >= 0 && device_index < N3DS_SENSOR_COUNT;
+}
+
+static int
+N3DS_SensorInit(void)
+{
+    if (InitN3DSServices() < 0) {
+        return SDL_SetError("Failed to initialise N3DS services");
+    }
+
+    N3DS_sensors[0].type = SDL_SENSOR_ACCEL;
+    N3DS_sensors[0].instance_id = SDL_GetNextSensorInstanceID();
+    N3DS_sensors[1].type = SDL_SENSOR_GYRO;
+    N3DS_sensors[1].instance_id = SDL_GetNextSensorInstanceID();
+    return 0;
+}
+
+SDL_FORCE_INLINE int
+InitN3DSServices(void)
+{
+    if (R_FAILED(hidInit())) {
+        return -1;
+    }
+
+    if (R_FAILED(HIDUSER_EnableAccelerometer())) {
+        return -1;
+    }
+
+    if (R_FAILED(HIDUSER_EnableGyroscope())) {
+        return -1;
+    }
+    return 0;
+}
+
+static int
+N3DS_SensorGetCount(void)
+{
+    return N3DS_SENSOR_COUNT;
+}
+
+static void
+N3DS_SensorDetect(void)
+{
+}
+
+static const char *
+N3DS_SensorGetDeviceName(int device_index)
+{
+    if (IsDeviceIndexValid(device_index)) {
+        switch (N3DS_sensors[device_index].type) {
+        case SDL_SENSOR_ACCEL:
+            return "Accelerometer";
+        case SDL_SENSOR_GYRO:
+            return "Gyroscope";
+        default:
+            return "Unknown";
+        }
+    }
+
+    return NULL;
+}
+
+static SDL_SensorType
+N3DS_SensorGetDeviceType(int device_index)
+{
+    if (IsDeviceIndexValid(device_index)) {
+        return N3DS_sensors[device_index].type;
+    }
+    return SDL_SENSOR_INVALID;
+}
+
+static int
+N3DS_SensorGetDeviceNonPortableType(int device_index)
+{
+    return (int) N3DS_SensorGetDeviceType(device_index);
+}
+
+static SDL_SensorID
+N3DS_SensorGetDeviceInstanceID(int device_index)
+{
+    if (IsDeviceIndexValid(device_index)) {
+        return N3DS_sensors[device_index].instance_id;
+    }
+    return -1;
+}
+
+static int
+N3DS_SensorOpen(SDL_Sensor *sensor, int device_index)
+{
+    return 0;
+}
+
+static void
+N3DS_SensorUpdate(SDL_Sensor *sensor)
+{
+    switch (sensor->type) {
+    case SDL_SENSOR_ACCEL:
+        UpdateN3DSAccelerometer(sensor);
+        break;
+    case SDL_SENSOR_GYRO:
+        UpdateN3DSGyroscope(sensor);
+        break;
+    default:
+        break;
+    }
+}
+
+SDL_FORCE_INLINE void
+UpdateN3DSAccelerometer(SDL_Sensor *sensor)
+{
+    static accelVector previous_state = { 0, 0, 0 };
+    accelVector current_state;
+    float data[3];
+
+    hidAccelRead(&current_state);
+    if (SDL_memcmp(&previous_state, &current_state, sizeof(accelVector)) != 0) {
+        SDL_memcpy(&previous_state, &current_state, sizeof(accelVector));
+        data[0] = (float) current_state.x * SDL_STANDARD_GRAVITY;
+        data[1] = (float) current_state.y * SDL_STANDARD_GRAVITY;
+        data[2] = (float) current_state.z * SDL_STANDARD_GRAVITY;
+        SDL_PrivateSensorUpdate(sensor, data, sizeof data);
+    }
+}
+
+SDL_FORCE_INLINE void
+UpdateN3DSGyroscope(SDL_Sensor *sensor)
+{
+    static angularRate previous_state = { 0, 0, 0 };
+    angularRate current_state;
+    float data[3];
+
+    hidGyroRead(&current_state);
+    if (SDL_memcmp(&previous_state, &current_state, sizeof(angularRate)) != 0) {
+        SDL_memcpy(&previous_state, &current_state, sizeof(angularRate));
+        data[0] = (float) current_state.x;
+        data[1] = (float) current_state.y;
+        data[2] = (float) current_state.z;
+        SDL_PrivateSensorUpdate(sensor, data, sizeof data);
+    }
+}
+
+static void
+N3DS_SensorClose(SDL_Sensor *sensor)
+{
+}
+
+static void
+N3DS_SensorQuit(void)
+{
+    HIDUSER_DisableGyroscope();
+    HIDUSER_DisableAccelerometer();
+    hidExit();
+}
+
+SDL_SensorDriver SDL_N3DS_SensorDriver = {
+    N3DS_SensorInit,
+    N3DS_SensorGetCount,
+    N3DS_SensorDetect,
+    N3DS_SensorGetDeviceName,
+    N3DS_SensorGetDeviceType,
+    N3DS_SensorGetDeviceNonPortableType,
+    N3DS_SensorGetDeviceInstanceID,
+    N3DS_SensorOpen,
+    N3DS_SensorUpdate,
+    N3DS_SensorClose,
+    N3DS_SensorQuit,
+};
+
+#endif /* SDL_SENSOR_N3DS */
+
+/* vi: set ts=4 sw=4 expandtab: */