/*
* Get the number of buttons on a joystick
*/
int SDL_JoystickNumButtons(SDL_Joystick *joystick)
{
if ( ! ValidJoystick(&joystick) ) {
return(-1);
}
return(joystick->nbuttons);
}
/*
* 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 hats on a joystick
*/
int SDL_JoystickNumHats(SDL_Joystick *joystick)
{
if ( ! ValidJoystick(&joystick) ) {
return(-1);
}
return(joystick->nhats);
}
/*
* 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 device index of an opened joystick.
*/
int SDL_JoystickIndex(SDL_Joystick *joystick)
{
if ( ! ValidJoystick(&joystick) ) {
return(-1);
}
return(joystick->index);
}
/*
* 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);
}
/*
* 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 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);
}
/*
* 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_JoystickClose(SDL_Joystick *joystick)
{
int i;
if ( ! ValidJoystick(&joystick) ) {
return;
}
if ( --joystick->ref_count > 0 ) {
return;
}
SDL_Lock_EventThread();
SDL_SYS_JoystickClose(joystick);
for ( i=0; SDL_joysticks[i]; ++i ) {
if ( joystick == SDL_joysticks[i] ) {
SDL_memmove(&SDL_joysticks[i], &SDL_joysticks[i+1],
(SDL_allocatedjoysticks-i)*sizeof(joystick));
break;
}
}
SDL_Unlock_EventThread();
if ( joystick->axes ) {
SDL_free(joystick->axes);
}
if ( joystick->hats ) {
SDL_free(joystick->hats);
}
if ( joystick->balls ) {
SDL_free(joystick->balls);
}
if ( joystick->buttons ) {
SDL_free(joystick->buttons);
}
SDL_free(joystick);
}
/*
* 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);
}
