Module: FW

Defined in:
lib/fw.rb,
ext/macosx/fwext.c

Defined Under Namespace

Classes: FWDevice

Class Method Summary collapse

Class Method Details

.scanbus ⇒ Object

Scan the FW bus and enumerate the devices



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# File 'ext/macosx/fwext.c', line 122

static VALUE scanbus()
{
  VALUE ret = rb_ary_new();
  
  mach_port_t master_port;
  io_iterator_t iterator;
  kern_return_t result = IOMasterPort(MACH_PORT_NULL, &master_port);
  CFMutableDictionaryRef matchingDictionary = IOServiceMatching("IOFireWireDevice");
  result = IOServiceGetMatchingServices(master_port, matchingDictionary, &iterator);
  
  io_object_t device;
  while((device = IOIteratorNext(iterator)))
  {
    CFNumberRef guidRef = IORegistryEntryCreateCFProperty(device, CFSTR("GUID"), NULL, 0);
    CFStringRef vendornameRef = IORegistryEntryCreateCFProperty(device, CFSTR("FireWire Vendor Name"), NULL, 0);
    CFNumberRef speedRef = IORegistryEntryCreateCFProperty(device, CFSTR("FireWire Speed"), NULL, 0);
    CFNumberRef nodeidRef = IORegistryEntryCreateCFProperty(device, CFSTR("FireWire Node ID"), NULL, 0);
    CFNumberRef vendoridRef = IORegistryEntryCreateCFProperty(device, CFSTR("Vendor_ID"), NULL, 0);

    CFIndex vendorname_len = CFStringGetLength(vendornameRef);
    char *vendorname = (char*)malloc(vendorname_len + 1);
    memset(vendorname, 0, vendorname_len);
    long long guid;
    SInt32 speed, vendorid, nodeid;
    if(guidRef
      && CFNumberGetValue(guidRef, kCFNumberLongLongType, &guid)
      && vendornameRef
      && CFStringGetCString(vendornameRef, vendorname, vendorname_len + 1, kCFStringEncodingMacRoman)
      && speedRef
      && CFNumberGetValue(speedRef, kCFNumberSInt32Type, &speed)
      && nodeidRef
      && CFNumberGetValue(nodeidRef, kCFNumberSInt32Type, &nodeid)
      && vendoridRef
      && CFNumberGetValue(vendoridRef, kCFNumberSInt32Type, &vendorid)
      )
    {
      VALUE fwdevice = FWDevice_new(device, guid, vendorname, vendorid, nodeid, speed);
      rb_ary_push(ret, fwdevice);
      CFRelease(guidRef);
      CFRelease(vendornameRef);
      CFRelease(speedRef);
      CFRelease(nodeidRef);
      CFRelease(vendoridRef);
    }
  }
  return ret;
}