Backed out changeset: a500a9dbfb41

src/joystick/android/SDL_sysjoystick.c

@@ -0,0 +1,156 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2013 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_config.h"
+
+#ifdef SDL_JOYSTICK_ANDROID
+
+/* This is the system specific header for the SDL joystick API */
+#include <stdio.h>              /* For the definition of NULL */
+
+#include "SDL_error.h"
+#include "SDL_events.h"
+#include "SDL_joystick.h"
+#include "../SDL_sysjoystick.h"
+#include "../SDL_joystick_c.h"
+#include "../../core/android/SDL_android.h"
+
+static const char *accelerometerName = "Android accelerometer";
+
+/* Function to scan the system for joysticks.
+ * This function should set SDL_numjoysticks to the number of available
+ * joysticks.  Joystick 0 should be the system default joystick.
+ * It should return 0, or -1 on an unrecoverable fatal error.
+ */
+int
+SDL_SYS_JoystickInit(void)
+{
+    return (1);
+}
+
+int SDL_SYS_NumJoysticks()
+{
+    return 1;
+}
+
+void SDL_SYS_JoystickDetect()
+{
+}
+
+SDL_bool SDL_SYS_JoystickNeedsPolling()
+{
+    return SDL_FALSE;
+}
+
+/* Function to get the device-dependent name of a joystick */
+const char *
+SDL_SYS_JoystickNameForDeviceIndex(int device_index)
+{
+    return accelerometerName;
+}
+
+/* Function to perform the mapping from device index to the instance id for this index */
+SDL_JoystickID SDL_SYS_GetInstanceIdOfDeviceIndex(int device_index)
+{
+    return device_index;
+}
+
+/* Function to open a joystick for use.
+   The joystick to open is specified by the index field of the joystick.
+   This should fill the nbuttons and naxes fields of the joystick structure.
+   It returns 0, or -1 if there is an error.
+ */
+int
+SDL_SYS_JoystickOpen(SDL_Joystick * joystick, int device_index)
+{
+    if (device_index == 0) {
+        joystick->nbuttons = 0;
+        joystick->nhats = 0;
+        joystick->nballs = 0;
+        joystick->naxes = 3;
+        return 0;
+	} else {
+		SDL_SetError("No joystick available with that index");
+		return (-1);
+	}
+}
+
+/* Function to determine is this joystick is attached to the system right now */
+SDL_bool SDL_SYS_JoystickAttached(SDL_Joystick *joystick)
+{
+    return SDL_TRUE;
+}
+
+/* Function to update the state of a joystick - called as a device poll.
+ * This function shouldn't update the joystick structure directly,
+ * but instead should call SDL_PrivateJoystick*() to deliver events
+ * and update joystick device state.
+ */
+void
+SDL_SYS_JoystickUpdate(SDL_Joystick * joystick)
+{
+    int i;
+    Sint16 value;
+    float values[3];
+
+    if (Android_JNI_GetAccelerometerValues(values)) {
+        for ( i = 0; i < 3; i++ ) {
+            value = (Sint16)(values[i] * 32767.0f);
+            SDL_PrivateJoystickAxis(joystick, i, value);
+        }
+    }
+}
+
+/* Function to close a joystick after use */
+void
+SDL_SYS_JoystickClose(SDL_Joystick * joystick)
+{
+}
+
+/* Function to perform any system-specific joystick related cleanup */
+void
+SDL_SYS_JoystickQuit(void)
+{
+}
+
+SDL_JoystickGUID SDL_SYS_JoystickGetDeviceGUID( int device_index )
+{
+    SDL_JoystickGUID guid;
+    // the GUID is just the first 16 chars of the name for now
+    const char *name = SDL_SYS_JoystickNameForDeviceIndex( device_index );
+    SDL_zero( guid );
+    SDL_memcpy( &guid, name, SDL_min( sizeof(guid), SDL_strlen( name ) ) );
+    return guid;
+}
+
+SDL_JoystickGUID SDL_SYS_JoystickGetGUID(SDL_Joystick * joystick)
+{
+    SDL_JoystickGUID guid;
+    // the GUID is just the first 16 chars of the name for now
+    const char *name = joystick->name;
+    SDL_zero( guid );
+    SDL_memcpy( &guid, name, SDL_min( sizeof(guid), SDL_strlen( name ) ) );
+    return guid;
+}
+
+#endif /* SDL_JOYSTICK_ANDROID */
+
+/* vi: set ts=4 sw=4 expandtab: */