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Check that the linux 2.4 event interface is available before creating 

a dinput device based on it.
This commit is contained in:
Ove Kaaven 2001-01-26 20:39:07 +00:00 committed by Alexandre Julliard
parent 8a65170c37
commit 36d3aa3d10
1 changed files with 38 additions and 0 deletions
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38
dlls/dinput/joystick/linuxinput.c
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@ -183,6 +183,44 @@ static JoystickAImpl *alloc_device(REFGUID rguid, ICOM_VTABLE(IDirectInputDevice
static HRESULT joydev_create_device(IDirectInputAImpl *dinput, REFGUID rguid, REFIID riid, LPDIRECTINPUTDEVICEA* pdev)
{
int i, fd, havejoy = 0;
for (i=0;i<64;i++) {
char buf[200];
BYTE absbits[(ABS_MAX+7)/8],keybits[(KEY_MAX+7)/8];
sprintf(buf,EVDEVPREFIX"%d",i);
if (-1!=(fd=open(buf,O_RDONLY))) {
if (-1==ioctl(fd,EVIOCGBIT(EV_ABS,sizeof(absbits)),absbits)) {
perror("EVIOCGBIT EV_ABS");
close(fd);
continue;
}
if (-1==ioctl(fd,EVIOCGBIT(EV_KEY,sizeof(keybits)),keybits)) {
perror("EVIOCGBIT EV_KEY");
close(fd);
continue;
}
/* A true joystick has at least axis X and Y, and at least 1
* button. copied from linux/drivers/input/joydev.c */
if (test_bit(absbits,ABS_X) && test_bit(absbits,ABS_Y) &&
( test_bit(keybits,BTN_TRIGGER) ||
test_bit(keybits,BTN_A) ||
test_bit(keybits,BTN_1)
)
) {
FIXME("found a joystick at %s!\n",buf);
havejoy = 1;
}
close(fd);
}
if (havejoy || (errno==ENODEV))
break;
}
if (!havejoy)
return DIERR_DEVICENOTREG;
if ((IsEqualGUID(&GUID_Joystick,rguid)) ||
(IsEqualGUID(&DInput_Wine_Joystick_GUID,rguid))) {
if ((riid == NULL) || (IsEqualGUID(&IID_IDirectInputDevice2A,riid)) || (IsEqualGUID(&IID_IDirectInputDevice2A,riid))) {