/* 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.
*/
static __inline__ void JS_HandleEvents(SDL_Joystick *joystick)
{
struct js_event events[32];
int i, len;
Uint8 other_axis;
#ifndef NO_LOGICAL_JOYSTICKS
if (SDL_joylist[joystick->index].fname == NULL) {
SDL_joylist_head(i, joystick->index);
JS_HandleEvents(SDL_joylist[i].joy);
return;
}
#endif
while ((len=read(joystick->hwdata->fd, events, (sizeof events))) > 0) {
len /= sizeof(events[0]);
for ( i=0; i<len; ++i ) {
switch (events[i].type & ~JS_EVENT_INIT) {
case JS_EVENT_AXIS:
if ( events[i].number < joystick->naxes ) {
#ifndef NO_LOGICAL_JOYSTICKS
if (!LogicalJoystickAxis(joystick,
events[i].number, events[i].value))
#endif
SDL_PrivateJoystickAxis(joystick,
events[i].number, events[i].value);
break;
}
events[i].number -= joystick->naxes;
other_axis = (events[i].number / 2);
if ( other_axis < joystick->nhats ) {
HandleHat(joystick, other_axis,
events[i].number%2,
events[i].value);
break;
}
events[i].number -= joystick->nhats*2;
other_axis = (events[i].number / 2);
if ( other_axis < joystick->nballs ) {
HandleBall(joystick, other_axis,
events[i].number%2,
events[i].value);
break;
}
break;
case JS_EVENT_BUTTON:
#ifndef NO_LOGICAL_JOYSTICKS
if (!LogicalJoystickButton(joystick,
events[i].number, events[i].value))
#endif
SDL_PrivateJoystickButton(joystick,
events[i].number, events[i].value);
break;
default:
/* ?? */
break;
}
}
}
}
void STJoystick::Sys_Update()
{
int i;
#if SDL_INPUT_LINUXEV
if ( joystick_data->hwdata->is_hid )
EV_HandleEvents(this->joystick_data);
else
#endif
JS_HandleEvents(this->joystick_data);
/* Deliver ball motion updates */
for ( i=0; i<joystick_data->nballs; ++i ) {
int xrel, yrel;
xrel = joystick_data->hwdata->balls[i].axis[0];
yrel = joystick_data->hwdata->balls[i].axis[1];
if ( xrel || yrel ) {
joystick_data->hwdata->balls[i].axis[0] = 0;
joystick_data->hwdata->balls[i].axis[1] = 0;
joystick_data->balls[i].dx = xrel;
joystick_data->balls[i].dy = yrel;
}
}
}
void
SDL_SYS_JoystickUpdate(SDL_Joystick * joystick)
{
int i;
#if SDL_INPUT_LINUXEV
if (joystick->hwdata->is_hid)
EV_HandleEvents(joystick);
else
#endif
JS_HandleEvents(joystick);
/* Deliver ball motion updates */
for (i = 0; i < joystick->nballs; ++i) {
int xrel, yrel;
xrel = joystick->hwdata->balls[i].axis[0];
yrel = joystick->hwdata->balls[i].axis[1];
if (xrel || yrel) {
joystick->hwdata->balls[i].axis[0] = 0;
joystick->hwdata->balls[i].axis[1] = 0;
SDL_PrivateJoystickBall(joystick, (Uint8) i, xrel, yrel);
}
}
}
