int wiiuse_os_read(struct wiimote_t* wm, byte* buf, int len) {
DWORD b, r;
if (!wm || !WIIMOTE_IS_CONNECTED(wm)) {
return 0;
}
if (!ReadFile(wm->dev_handle, buf, len, &b, &wm->hid_overlap)) {
/* partial read */
b = GetLastError();
if ((b == ERROR_HANDLE_EOF) || (b == ERROR_DEVICE_NOT_CONNECTED)) {
/* remote disconnect */
wiiuse_disconnected(wm);
return 0;
}
r = WaitForSingleObject(wm->hid_overlap.hEvent, wm->timeout);
if (r == WAIT_TIMEOUT) {
/* timeout - cancel and continue */
if (*buf) {
WIIUSE_WARNING("Packet ignored. This may indicate a problem (timeout is %i ms).", wm->timeout);
}
CancelIo(wm->dev_handle);
ResetEvent(wm->hid_overlap.hEvent);
return 0;
} else if (r == WAIT_FAILED) {
WIIUSE_WARNING("A wait error occurred on reading from wiimote %i.", wm->unid);
return 0;
}
if (!GetOverlappedResult(wm->dev_handle, &wm->hid_overlap, &b, 0)) {
return 0;
}
/* log the received data */
#ifdef WITH_WIIUSE_DEBUG
{
DWORD i;
printf("[DEBUG] (id %i) RECV: (%.2x) ", wm->unid, buf[0]);
for (i = 1; i < b; i++) {
printf("%.2x ", buf[i]);
}
printf("\n");
}
#endif
}
ResetEvent(wm->hid_overlap.hEvent);
return 1;
}
int wiiuse_io_read(struct wiimote_t* wm) {
DWORD b, r;
if (!wm || !WIIMOTE_IS_CONNECTED(wm))
return 0;
if (!ReadFile(wm->dev_handle, wm->event_buf, sizeof(wm->event_buf), &b, &wm->hid_overlap)) {
/* partial read */
b = GetLastError();
if ((b == ERROR_HANDLE_EOF) || (b == ERROR_DEVICE_NOT_CONNECTED)) {
/* remote disconnect */
wiiuse_disconnected(wm);
return 0;
}
r = WaitForSingleObject(wm->hid_overlap.hEvent, wm->timeout);
if (r == WAIT_TIMEOUT) {
/* timeout - cancel and continue */
if (*wm->event_buf)
WIIUSE_WARNING("Packet ignored. This may indicate a problem (timeout is %i ms).", wm->timeout);
CancelIo(wm->dev_handle);
ResetEvent(wm->hid_overlap.hEvent);
return 0;
} else if (r == WAIT_FAILED) {
WIIUSE_WARNING("A wait error occured on reading from wiimote %i.", wm->unid);
return 0;
}
if (!GetOverlappedResult(wm->dev_handle, &wm->hid_overlap, &b, 0))
return 0;
}
ResetEvent(wm->hid_overlap.hEvent);
return 1;
}
