386     usb_handle h;  in init_usb()  local
388     h.success = 0;  in init_usb()
389     h.callback = callback;  in init_usb()
427         if (try_device(device, &h) != 0) {  in init_usb()
433         if (h.success) {  in init_usb()
435             memcpy(*handle, &h, sizeof(usb_handle));  in init_usb()
465 int usb_close(usb_handle *h) {  in usb_close()  argument
470 int usb_read(usb_handle *h, void *data, int len) {  in usb_read()  argument
478     if (h == NULL) {  in usb_read()
482     if (h->interface == NULL) {  in usb_read()
487     if (h->bulkIn == 0) {  in usb_read()
492     result = (*h->interface)->ReadPipe(  in usb_read()
493             h->interface, h->bulkIn, data, &numBytes);  in usb_read()
504 int usb_write(usb_handle *h, const void *data, int len) {  in usb_write()  argument
511     if (h == NULL) {  in usb_write()
515     if (h->interface == NULL) {  in usb_write()
520     if (h->bulkOut == 0) {  in usb_write()
526     result = (*h->interface)->WritePipe(  in usb_write()
527             h->interface, h->bulkOut, (void *)data, len);  in usb_write()
540         result = (*h->interface)->WritePipe(  in usb_write()
541                 h->interface, h->bulkOut, (void *)data, lenToSend);  in usb_write()
550     if ((result == 0) && (h->zero_mask)) {  in usb_write()
552         if(!(len & h->zero_mask)) {  in usb_write()
553             result = (*h->interface)->WritePipe(  in usb_write()
554                     h->interface, h->bulkOut, (void *)data, 0);  in usb_write()