/* Some heuristics to see if the device is a keyboard. */
static bool
is_keyboard(int fd)
{
int i;
unsigned long evbits[NLONGS(EV_CNT)] = { 0 };
unsigned long keybits[NLONGS(KEY_CNT)] = { 0 };
errno = 0;
ioctl(fd, EVIOCGBIT(0, sizeof(evbits)), evbits);
if (errno)
return false;
if (!evdev_bit_is_set(evbits, EV_KEY))
return false;
errno = 0;
ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits);
if (errno)
return false;
for (i = KEY_RESERVED; i <= KEY_MIN_INTERESTING; i++)
if (evdev_bit_is_set(keybits, i))
return true;
return false;
}
static bool fill_joystick_buttons(ALLEGRO_JOYSTICK_LINUX *joy, int fd)
{
unsigned long key_bits[NLONGS(KEY_CNT)] = {0};
int b;
int i;
if (ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(key_bits)), key_bits) < 0)
return false;
b = 0;
for (i = LJOY_BTN_RANGE_START; i < LJOY_BTN_RANGE_END; i++) {
if (TEST_BIT(i, key_bits) && is_joystick_button(i)) {
joy->button_mapping[b].ev_code = i;
ALLEGRO_DEBUG("Input event code %d maps to button %d\n", i, b);
joy->parent.info.button[b].name = al_malloc(32);
snprintf((char *)joy->parent.info.button[b].name, 32, "B%d", b+1);
b++;
if (b == _AL_MAX_JOYSTICK_BUTTONS)
break;
}
}
joy->parent.info.num_buttons = b;
/* Clear the rest. */
for (; b < _AL_MAX_JOYSTICK_BUTTONS; b++) {
joy->button_mapping[b].ev_code = -1;
}
return true;
}
/* Check if the device has at least one joystick-related absolute axis.
* Some devices, like (wireless) keyboards, may actually have absolute axes
* such as a volume axis for the volume up/down buttons.
* Also, some devices like a PS3 controller report many unusual axes, probably
* used in nonstandard ways by the PS3 console. All such axes are ignored by
* this function and by this driver.
*/
static bool have_joystick_axis(int fd)
{
unsigned long abs_bits[NLONGS(ABS_CNT)] = {0};
int i;
if (ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(abs_bits)), abs_bits) < 0)
return false;
for (i = LJOY_AXIS_RANGE_START; i < LJOY_AXIS_RANGE_END; i++) {
if (TEST_BIT(i, abs_bits))
return true;
}
return false;
}
/* Check if the device has at least once joystick-related button. */
static bool have_joystick_button(int fd)
{
unsigned long key_bits[NLONGS(KEY_CNT)] = {0};
int i;
if (ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(key_bits)), key_bits) < 0)
return false;
for (i = LJOY_BTN_RANGE_START; i < LJOY_BTN_RANGE_END; i++) {
if (TEST_BIT(i, key_bits) && is_joystick_button(i))
return true;
}
return false;
}
qboolean evdev_ismouse( int fd )
{
long event_bits[NLONGS(EV_CNT)];
memset( event_bits, 0, sizeof( event_bits ) );
if( ioctl( fd, EVIOCGBIT(0, EV_MAX), event_bits) < 0 )
return qfalse; // jag vet inte
//show_bit( EV_REL, event_bits );
//show_bit( EV_KEY, event_bits );
//show_bit( EV_ABS, event_bits );
if( !test_bit( EV_REL, event_bits ) )
return qfalse;
if( !test_bit( EV_KEY, event_bits ) )
return qfalse;
return qtrue;
}
static bool fill_joystick_axes(ALLEGRO_JOYSTICK_LINUX *joy, int fd)
{
unsigned long abs_bits[NLONGS(ABS_CNT)] = {0};
int stick;
int axis;
int name_sticks;
int name_throttles;
int res, i;
/* Scan the axes to get their properties. */
res = ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(abs_bits)), abs_bits);
if (res < 0)
return false;
stick = 0;
axis = 0;
name_sticks = 0;
name_throttles = 0;
for (i = LJOY_AXIS_RANGE_START; i < LJOY_AXIS_RANGE_END; i++) {
struct input_absinfo absinfo;
if (!TEST_BIT(i, abs_bits))
continue;
if (ioctl(fd, EVIOCGABS(i), &absinfo) < 0)
continue;
if (is_single_axis_throttle(i)) {
/* One axis throttle. */
name_throttles++;
joy->parent.info.stick[stick].flags = ALLEGRO_JOYFLAG_ANALOGUE;
joy->parent.info.stick[stick].num_axes = 1;
joy->parent.info.stick[stick].axis[0].name = "X";
joy->parent.info.stick[stick].name = al_malloc(32);
snprintf((char *)joy->parent.info.stick[stick].name, 32,
"Throttle %d", name_throttles);
set_axis_mapping(&joy->axis_mapping[i], stick, 0, &absinfo);
stick++;
}
else {
/* Regular axis, two axis stick. */
if (axis == 0) {
/* First axis of new joystick. */
name_sticks++;
if (is_hat_axis(i)) {
joy->parent.info.stick[stick].flags = ALLEGRO_JOYFLAG_DIGITAL;
} else {
joy->parent.info.stick[stick].flags = ALLEGRO_JOYFLAG_ANALOGUE;
}
joy->parent.info.stick[stick].num_axes = 2;
joy->parent.info.stick[stick].axis[0].name = "X";
joy->parent.info.stick[stick].axis[1].name = "Y";
joy->parent.info.stick[stick].name = al_malloc(32);
snprintf((char *)joy->parent.info.stick[stick].name, 32,
"Stick %d", name_sticks);
set_axis_mapping(&joy->axis_mapping[i], stick, axis, &absinfo);
axis++;
}
else {
/* Second axis. */
ASSERT(axis == 1);
set_axis_mapping(&joy->axis_mapping[i], stick, axis, &absinfo);
stick++;
axis = 0;
}
}
}
joy->parent.info.num_sticks = stick;
return true;
}