--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/joystick/SDL_joystick.c	Thu Apr 26 16:45:43 2001 +0000
@@ -0,0 +1,582 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@devolution.com
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+/* This is the joystick API for Simple DirectMedia Layer */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "SDL_error.h"
+#include "SDL_events.h"
+#ifndef DISABLE_EVENTS
+#include "SDL_events_c.h"
+#endif
+#include "SDL_joystick_c.h"
+#include "SDL_sysjoystick.h"
+
+/* This is used for Quake III Arena */
+#ifdef DISABLE_EVENTS
+#define SDL_Lock_EventThread()
+#define SDL_Unlock_EventThread()
+#endif
+
+Uint8 SDL_numjoysticks = 0;
+SDL_Joystick **SDL_joysticks = NULL;
+static SDL_Joystick *default_joystick = NULL;
+
+int SDL_JoystickInit(void)
+{
+	int arraylen;
+	int status;
+
+	SDL_numjoysticks = 0;
+	status = SDL_SYS_JoystickInit();
+	if ( status >= 0 ) {
+		arraylen = (status+1)*sizeof(*SDL_joysticks);
+		SDL_joysticks = (SDL_Joystick **)malloc(arraylen);
+		if ( SDL_joysticks == NULL ) {
+			SDL_numjoysticks = 0;
+		} else {
+			memset(SDL_joysticks, 0, arraylen);
+		}
+		SDL_numjoysticks = status;
+		status = 0;
+	}
+	default_joystick = NULL;
+	return(status);
+}
+
+/*
+ * Count the number of joysticks attached to the system
+ */
+int SDL_NumJoysticks(void)
+{
+	return SDL_numjoysticks;
+}
+
+/*
+ * Get the implementation dependent name of a joystick
+ */
+const char *SDL_JoystickName(int device_index)
+{
+	if ( (device_index < 0) || (device_index >= SDL_numjoysticks) ) {
+		SDL_SetError("There are %d joysticks available",
+		             SDL_numjoysticks);
+		return(NULL);
+	}
+	return(SDL_SYS_JoystickName(device_index));
+}
+
+/*
+ * Open a joystick for use - the index passed as an argument refers to
+ * the N'th joystick on the system.  This index is the value which will
+ * identify this joystick in future joystick events.
+ *
+ * This function returns a joystick identifier, or NULL if an error occurred.
+ */
+SDL_Joystick *SDL_JoystickOpen(int device_index)
+{
+	int i;
+	SDL_Joystick *joystick;
+
+	if ( (device_index < 0) || (device_index >= SDL_numjoysticks) ) {
+		SDL_SetError("There are %d joysticks available",
+		             SDL_numjoysticks);
+		return(NULL);
+	}
+
+	/* If the joystick is already open, return it */
+	for ( i=0; SDL_joysticks[i]; ++i ) {
+		if ( device_index == SDL_joysticks[i]->index ) {
+			joystick = SDL_joysticks[i];
+			++joystick->ref_count;
+			return(joystick);
+		}
+	}
+
+	/* Create and initialize the joystick */
+	joystick = (SDL_Joystick *)malloc((sizeof *joystick));
+	if ( joystick != NULL ) {
+		memset(joystick, 0, (sizeof *joystick));
+		joystick->index = device_index;
+		if ( SDL_SYS_JoystickOpen(joystick) < 0 ) {
+			free(joystick);
+			joystick = NULL;
+		} else {
+			if ( joystick->naxes > 0 ) {
+				joystick->axes = (Sint16 *)malloc
+					(joystick->naxes*sizeof(Sint16));
+			}
+			if ( joystick->nhats > 0 ) {
+				joystick->hats = (Uint8 *)malloc
+					(joystick->nhats*sizeof(Uint8));
+			}
+			if ( joystick->nballs > 0 ) {
+				joystick->balls = (struct balldelta *)malloc
+				  (joystick->nballs*sizeof(*joystick->balls));
+			}
+			if ( joystick->nbuttons > 0 ) {
+				joystick->buttons = (Uint8 *)malloc
+					(joystick->nbuttons*sizeof(Uint8));
+			}
+			if ( ((joystick->naxes > 0) && !joystick->axes)
+			  || ((joystick->nhats > 0) && !joystick->hats)
+			  || ((joystick->nballs > 0) && !joystick->balls)
+			  || ((joystick->nbuttons > 0) && !joystick->buttons)) {
+				SDL_OutOfMemory();
+				SDL_JoystickClose(joystick);
+				joystick = NULL;
+			}
+			if ( joystick->axes ) {
+				memset(joystick->axes, 0,
+					joystick->naxes*sizeof(Sint16));
+			}
+			if ( joystick->hats ) {
+				memset(joystick->hats, 0,
+					joystick->nhats*sizeof(Uint8));
+			}
+			if ( joystick->balls ) {
+				memset(joystick->balls, 0,
+				  joystick->nballs*sizeof(*joystick->balls));
+			}
+			if ( joystick->buttons ) {
+				memset(joystick->buttons, 0,
+					joystick->nbuttons*sizeof(Uint8));
+			}
+		}
+	}
+	if ( joystick ) {
+		/* Add joystick to list */
+		++joystick->ref_count;
+		SDL_Lock_EventThread();
+		for ( i=0; SDL_joysticks[i]; ++i )
+			/* Skip to next joystick */;
+		SDL_joysticks[i] = joystick;
+		SDL_Unlock_EventThread();
+	}
+	return(joystick);
+}
+
+/*
+ * Returns 1 if the joystick has been opened, or 0 if it has not.
+ */
+int SDL_JoystickOpened(int device_index)
+{
+	int i, opened;
+
+	opened = 0;
+	for ( i=0; SDL_joysticks[i]; ++i ) {
+		if ( SDL_joysticks[i]->index == (Uint8)device_index ) {
+			opened = 1;
+			break;
+		}
+	}
+	return(opened);
+}
+
+static int ValidJoystick(SDL_Joystick **joystick)
+{
+	int valid;
+
+	if ( *joystick == NULL ) {
+		*joystick = default_joystick;
+	}
+	if ( *joystick == NULL ) {
+		SDL_SetError("Joystick hasn't been opened yet");
+		valid = 0;
+	} else {
+		valid = 1;
+	}
+	return valid;
+}
+
+/*
+ * Get the device index of an opened joystick.
+ */
+int SDL_JoystickIndex(SDL_Joystick *joystick)
+{
+	if ( ! ValidJoystick(&joystick) ) {
+		return(-1);
+	}
+	return(joystick->index);
+}
+
+/*
+ * Get the number of multi-dimensional axis controls on a joystick
+ */
+int SDL_JoystickNumAxes(SDL_Joystick *joystick)
+{
+	if ( ! ValidJoystick(&joystick) ) {
+		return(-1);
+	}
+	return(joystick->naxes);
+}
+
+/*
+ * Get the number of hats on a joystick
+ */
+int SDL_JoystickNumHats(SDL_Joystick *joystick)
+{
+	if ( ! ValidJoystick(&joystick) ) {
+		return(-1);
+	}
+	return(joystick->nhats);
+}
+
+/*
+ * Get the number of trackballs on a joystick
+ */
+int SDL_JoystickNumBalls(SDL_Joystick *joystick)
+{
+	if ( ! ValidJoystick(&joystick) ) {
+		return(-1);
+	}
+	return(joystick->nballs);
+}
+
+/*
+ * Get the number of buttons on a joystick
+ */
+int SDL_JoystickNumButtons(SDL_Joystick *joystick)
+{
+	if ( ! ValidJoystick(&joystick) ) {
+		return(-1);
+	}
+	return(joystick->nbuttons);
+}
+
+/*
+ * Get the current state of an axis control on a joystick
+ */
+Sint16 SDL_JoystickGetAxis(SDL_Joystick *joystick, int axis)
+{
+	Sint16 state;
+
+	if ( ! ValidJoystick(&joystick) ) {
+		return(0);
+	}
+	if ( axis < joystick->naxes ) {
+		state = joystick->axes[axis];
+	} else {
+		SDL_SetError("Joystick only has %d axes", joystick->naxes);
+		state = 0;
+	}
+	return(state);
+}
+
+/*
+ * Get the current state of a hat on a joystick
+ */
+Uint8 SDL_JoystickGetHat(SDL_Joystick *joystick, int hat)
+{
+	Uint8 state;
+
+	if ( ! ValidJoystick(&joystick) ) {
+		return(0);
+	}
+	if ( hat < joystick->nhats ) {
+		state = joystick->hats[hat];
+	} else {
+		SDL_SetError("Joystick only has %d hats", joystick->nhats);
+		state = 0;
+	}
+	return(state);
+}
+
+/*
+ * Get the ball axis change since the last poll
+ */
+int SDL_JoystickGetBall(SDL_Joystick *joystick, int ball, int *dx, int *dy)
+{
+	int retval;
+
+	if ( ! ValidJoystick(&joystick) ) {
+		return(-1);
+	}
+
+	retval = 0;
+	if ( ball < joystick->nballs ) {
+		if ( dx ) {
+			*dx = joystick->balls[ball].dx;
+		}
+		if ( dy ) {
+			*dy = joystick->balls[ball].dy;
+		}
+		joystick->balls[ball].dx = 0;
+		joystick->balls[ball].dy = 0;
+	} else {
+		SDL_SetError("Joystick only has %d balls", joystick->nballs);
+		retval = -1;
+	}
+	return(retval);
+}
+
+/*
+ * Get the current state of a button on a joystick
+ */
+Uint8 SDL_JoystickGetButton(SDL_Joystick *joystick, int button)
+{
+	Uint8 state;
+
+	if ( ! ValidJoystick(&joystick) ) {
+		return(0);
+	}
+	if ( button < joystick->nbuttons ) {
+		state = joystick->buttons[button];
+	} else {
+		SDL_SetError("Joystick only has %d buttons",joystick->nbuttons);
+		state = 0;
+	}
+	return(state);
+}
+
+/*
+ * Close a joystick previously opened with SDL_JoystickOpen()
+ */
+void SDL_JoystickClose(SDL_Joystick *joystick)
+{
+	int i;
+
+	if ( ! ValidJoystick(&joystick) ) {
+		return;
+	}
+
+	/* First decrement ref count */
+	if ( --joystick->ref_count > 0 ) {
+		return;
+	}
+
+	/* Lock the event queue - prevent joystick polling */
+	SDL_Lock_EventThread();
+
+	if ( joystick == default_joystick ) {
+		default_joystick = NULL;
+	}
+	SDL_SYS_JoystickClose(joystick);
+
+	/* Remove joystick from list */
+	for ( i=0; SDL_joysticks[i]; ++i ) {
+		if ( joystick == SDL_joysticks[i] ) {
+			memcpy(&SDL_joysticks[i], &SDL_joysticks[i+1],
+			       (SDL_numjoysticks-i)*sizeof(joystick));
+			break;
+		}
+	}
+
+	/* Let the event thread keep running */
+	SDL_Unlock_EventThread();
+
+	/* Free the data associated with this joystick */
+	if ( joystick->axes ) {
+		free(joystick->axes);
+	}
+	if ( joystick->hats ) {
+		free(joystick->hats);
+	}
+	if ( joystick->balls ) {
+		free(joystick->balls);
+	}
+	if ( joystick->buttons ) {
+		free(joystick->buttons);
+	}
+	free(joystick);
+}
+
+void SDL_JoystickQuit(void)
+{
+	/* Stop the event polling */
+	SDL_Lock_EventThread();
+	SDL_numjoysticks = 0;
+	SDL_Unlock_EventThread();
+
+	/* Quit the joystick setup */
+	SDL_SYS_JoystickQuit();
+	if ( SDL_joysticks ) {
+		free(SDL_joysticks);
+		SDL_joysticks = NULL;
+	}
+}
+
+
+/* These are global for SDL_sysjoystick.c and SDL_events.c */
+
+int SDL_PrivateJoystickAxis(SDL_Joystick *joystick, Uint8 axis, Sint16 value)
+{
+	int posted;
+
+	/* Update internal joystick state */
+	joystick->axes[axis] = value;
+
+	/* Post the event, if desired */
+	posted = 0;
+#ifndef DISABLE_EVENTS
+	if ( SDL_ProcessEvents[SDL_JOYAXISMOTION] == SDL_ENABLE ) {
+		SDL_Event event;
+		event.type = SDL_JOYAXISMOTION;
+		event.jaxis.which = joystick->index;
+		event.jaxis.axis = axis;
+		event.jaxis.value = value;
+		if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
+			posted = 1;
+			SDL_PushEvent(&event);
+		}
+	}
+#endif /* !DISABLE_EVENTS */
+	return(posted);
+}
+
+int SDL_PrivateJoystickHat(SDL_Joystick *joystick, Uint8 hat, Uint8 value)
+{
+	int posted;
+
+	/* Update internal joystick state */
+	joystick->hats[hat] = value;
+
+	/* Post the event, if desired */
+	posted = 0;
+#ifndef DISABLE_EVENTS
+	if ( SDL_ProcessEvents[SDL_JOYHATMOTION] == SDL_ENABLE ) {
+		SDL_Event event;
+		event.jhat.type = SDL_JOYHATMOTION;
+		event.jhat.which = joystick->index;
+		event.jhat.hat = hat;
+		event.jhat.value = value;
+		if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
+			posted = 1;
+			SDL_PushEvent(&event);
+		}
+	}
+#endif /* !DISABLE_EVENTS */
+	return(posted);
+}
+
+int SDL_PrivateJoystickBall(SDL_Joystick *joystick, Uint8 ball,
+					Sint16 xrel, Sint16 yrel)
+{
+	int posted;
+
+	/* Update internal mouse state */
+	joystick->balls[ball].dx += xrel;
+	joystick->balls[ball].dy += yrel;
+
+	/* Post the event, if desired */
+	posted = 0;
+#ifndef DISABLE_EVENTS
+	if ( SDL_ProcessEvents[SDL_JOYBALLMOTION] == SDL_ENABLE ) {
+		SDL_Event event;
+		event.jball.type = SDL_JOYBALLMOTION;
+		event.jball.which = joystick->index;
+		event.jball.ball = ball;
+		event.jball.xrel = xrel;
+		event.jball.yrel = yrel;
+		if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
+			posted = 1;
+			SDL_PushEvent(&event);
+		}
+	}
+#endif /* !DISABLE_EVENTS */
+	return(posted);
+}
+
+int SDL_PrivateJoystickButton(SDL_Joystick *joystick, Uint8 button, Uint8 state)
+{
+	int posted;
+#ifndef DISABLE_EVENTS
+	SDL_Event event;
+
+	switch ( state ) {
+		case SDL_PRESSED:
+			event.type = SDL_JOYBUTTONDOWN;
+			break;
+		case SDL_RELEASED:
+			event.type = SDL_JOYBUTTONUP;
+			break;
+		default:
+			/* Invalid state -- bail */
+			return(0);
+	}
+#endif /* !DISABLE_EVENTS */
+
+	/* Update internal joystick state */
+	joystick->buttons[button] = state;
+
+	/* Post the event, if desired */
+	posted = 0;
+#ifndef DISABLE_EVENTS
+	if ( SDL_ProcessEvents[event.type] == SDL_ENABLE ) {
+		event.jbutton.which = joystick->index;
+		event.jbutton.button = button;
+		event.jbutton.state = state;
+		if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
+			posted = 1;
+			SDL_PushEvent(&event);
+		}
+	}
+#endif /* !DISABLE_EVENTS */
+	return(posted);
+}
+
+void SDL_JoystickUpdate(void)
+{
+	int i;
+
+	for ( i=0; SDL_joysticks[i]; ++i ) {
+		SDL_SYS_JoystickUpdate(SDL_joysticks[i]);
+	}
+}
+
+int SDL_JoystickEventState(int state)
+{
+#ifdef DISABLE_EVENTS
+	return SDL_IGNORE;
+#else
+	const Uint8 event_list[] = {
+		SDL_JOYAXISMOTION, SDL_JOYBALLMOTION, SDL_JOYHATMOTION,
+		SDL_JOYBUTTONDOWN, SDL_JOYBUTTONUP,
+	};
+	int i;
+
+	switch (state) {
+		case SDL_QUERY:
+			state = SDL_IGNORE;
+			for ( i=0; i<SDL_TABLESIZE(event_list); ++i ) {
+				state = SDL_EventState(event_list[i],SDL_QUERY);
+				if ( state == SDL_ENABLE ) {
+					break;
+				}
+			}
+			break;
+		default:
+			for ( i=0; i<SDL_TABLESIZE(event_list); ++i ) {
+				SDL_EventState(event_list[i], state);
+			}
+			break;
+	}
+	return(state);
+#endif /* DISABLE_EVENTS */
+}