Just the sysjoystick file for the iPhone accelerometer. It doesn't re…

…veal anything under NDA, but I just wanted to make sure that adding files to the repository is working under XCode right now.

src/joystick/iphoneos/SDL_sysjoystick.m

@@ -0,0 +1,125 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2006 Sam Lantinga
+
+    This library 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 2.1 of the License, or (at your option) any later version.
+
+    This library 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 this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+/* This is the system specific header for the SDL joystick API */
+
+#include "SDL_joystick.h"
+#include "../SDL_sysjoystick.h"
+#include "../SDL_joystick_c.h"
+#import "SDLUIAccelerationDelegate.h"
+
+const char *accelerometerName = "iPhone 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)
+{
+    SDL_numjoysticks = 1;
+    return (1);
+}
+
+/* Function to get the device-dependent name of a joystick */
+const char *
+SDL_SYS_JoystickName(int index)
+{
+	switch(index) {
+		case 0:
+			return accelerometerName;
+		default:
+			SDL_SetError("No joystick available with that index");
+			return NULL;
+	}
+}
+
+/* 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)
+{
+	if (joystick->index == 0) {
+		joystick->naxes = 3;
+		joystick->nhats = 0;
+		joystick->nballs = 0;
+		joystick->nbuttons = 0;
+		joystick->name  = accelerometerName;
+		[[SDLUIAccelerationDelegate sharedDelegate] startup];
+		return 0;
+	}
+	else {
+		SDL_SetError("No joystick available with that index");
+		return (-1);
+	}
+
+}
+
+/* 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)
+{
+
+	Sint16 orientation[3];
+	[[SDLUIAccelerationDelegate sharedDelegate] getLastOrientation: orientation];
+
+	if ([[SDLUIAccelerationDelegate sharedDelegate] hasNewData]) {
+
+		[[SDLUIAccelerationDelegate sharedDelegate] setHasNewData: NO];
+
+		SDL_PrivateJoystickAxis(joystick, 0, orientation[0]);
+		SDL_PrivateJoystickAxis(joystick, 1, orientation[1]);
+		SDL_PrivateJoystickAxis(joystick, 2, orientation[2]);
+
+	}
+
+    return;
+}
+
+/* Function to close a joystick after use */
+void
+SDL_SYS_JoystickClose(SDL_Joystick * joystick)
+{
+	if (joystick->index == 0 && [[SDLUIAccelerationDelegate sharedDelegate] isRunning]) {
+		[[SDLUIAccelerationDelegate sharedDelegate] shutdown];
+	}
+	SDL_SetError("No joystick open with that index");
+
+    return;
+}
+
+/* Function to perform any system-specific joystick related cleanup */
+void
+SDL_SYS_JoystickQuit(void)
+{
+    return;
+}
+/* vi: set ts=4 sw=4 expandtab: */