Whitespace cleanup
diff --git a/examples/dpfp.c b/examples/dpfp.c
index bd9702a..1970f10 100644
--- a/examples/dpfp.c
+++ b/examples/dpfp.c
@@ -169,7 +169,7 @@
 
 	if (!buf)
 		return -ENOMEM;
-	
+
 	transfer = libusb_alloc_transfer(0);
 	if (!transfer) {
 		free(buf);
@@ -208,7 +208,7 @@
 }
 
 static int sync_intr(unsigned char type)
-{	
+{
 	int r;
 	unsigned char data[INTR_LENGTH];
 
@@ -396,7 +396,7 @@
 	img_transfer = libusb_alloc_transfer(0);
 	if (!img_transfer)
 		return -ENOMEM;
-	
+
 	irq_transfer = libusb_alloc_transfer(0);
 	if (!irq_transfer)
 		return -ENOMEM;
@@ -411,7 +411,7 @@
 
 static void sighandler(int signum)
 {
-	do_exit = 1;	
+	do_exit = 1;
 }
 
 int main(void)
@@ -470,7 +470,7 @@
 	}
 
 	printf("shutting down...\n");
-	
+
 	if (irq_transfer) {
 		r = libusb_cancel_transfer(irq_transfer);
 		if (r < 0)
@@ -482,11 +482,11 @@
 		if (r < 0)
 			goto out_deinit;
 	}
-	
+
 	while (irq_transfer || img_transfer)
 		if (libusb_handle_events(NULL) < 0)
 			break;
-	
+
 	if (do_exit == 1)
 		r = 0;
 	else
diff --git a/libusb/io.c b/libusb/io.c
index ce661ad..f627bcf 100644
--- a/libusb/io.c
+++ b/libusb/io.c
@@ -120,7 +120,7 @@
  *
  * For details on how to use the synchronous API, see the
  * \ref syncio "synchronous I/O API documentation" pages.
- * 
+ *
  * \section async The asynchronous interface
  *
  * Asynchronous I/O is the most significant new feature in libusb-1.0.
@@ -241,7 +241,7 @@
  * -# <b>Completion handling</b>: examine transfer results in the
  *    libusb_transfer structure
  * -# <b>Deallocation</b>: clean up resources
- * 
+ *
  *
  * \subsection asyncalloc Allocation
  *
@@ -394,7 +394,7 @@
  * request was not supported.
  *
  * \section asyncintr Considerations for interrupt transfers
- * 
+ *
  * All interrupt transfers are performed using the polling interval presented
  * by the bInterval value of the endpoint descriptor.
  *
@@ -512,12 +512,12 @@
  * -# Repeatedly call libusb_handle_events() in blocking mode from a dedicated
  *    thread.
  *
- * The first option is plainly not very nice, and will cause unnecessary 
+ * The first option is plainly not very nice, and will cause unnecessary
  * CPU wakeups leading to increased power usage and decreased battery life.
  * The second option is not very nice either, but may be the nicest option
  * available to you if the "proper" approach can not be applied to your
  * application (read on...).
- * 
+ *
  * The recommended option is to integrate libusb with your application main
  * event loop. libusb exposes a set of file descriptors which allow you to do
  * this. Your main loop is probably already calling poll() or select() or a
@@ -757,7 +757,7 @@
  * the loop, <em>up to 120 seconds later.</em> Clearly a two-minute delay is
  * undesirable, and don't even think about using short timeouts to circumvent
  * this issue!
- * 
+ *
  * The solution here is to ensure that no two threads are ever polling the
  * file descriptors at the same time. A naive implementation of this would
  * impact the capabilities of the library, so libusb offers the scheme
@@ -765,7 +765,7 @@
  *
  * Before we go any further, it is worth mentioning that all libusb-wrapped
  * event handling procedures fully adhere to the scheme documented below.
- * This includes libusb_handle_events() and all the synchronous I/O functions - 
+ * This includes libusb_handle_events() and all the synchronous I/O functions -
  * libusb hides this headache from you. You do not need to worry about any
  * of these issues if you stick to that level.
  *
@@ -853,7 +853,7 @@
 			libusb_unlock_event_waiters(ctx);
 			goto retry;
 		}
-	
+
 		libusb_wait_for_event(ctx);
 	}
 	libusb_unlock_event_waiters(ctx);
@@ -1461,7 +1461,7 @@
 	if (r)
 		return 1;
 
-	ctx->event_handler_active = 1;	
+	ctx->event_handler_active = 1;
 	return 0;
 }
 
@@ -1727,7 +1727,7 @@
 				(cur_tv->tv_sec == systime.tv_sec &&
 					cur_tv->tv_usec > systime.tv_usec))
 			return 0;
-	
+
 		/* otherwise, we've got an expired timeout to handle */
 		handle_timeout(transfer);
 	}
@@ -2058,7 +2058,7 @@
  * need to use this function if you are calling poll() or select() or similar
  * on libusb's file descriptors yourself - you do not need to use it if you
  * are calling libusb_handle_events() or a variant directly.
- * 
+ *
  * You should call this function in your main loop in order to determine how
  * long to wait for select() or poll() to return results. libusb needs to be
  * called into at this timeout, so you should use it as an upper bound on
@@ -2275,7 +2275,7 @@
 
 	/* terminate all pending transfers with the LIBUSB_TRANSFER_NO_DEVICE
 	 * status code.
-	 * 
+	 *
 	 * this is a bit tricky because:
 	 * 1. we can't do transfer completion while holding flying_transfers_lock
 	 * 2. the transfers list can change underneath us - if we were to build a
diff --git a/libusb/libusbi.h b/libusb/libusbi.h
index 740e249..9dcca2f 100644
--- a/libusb/libusbi.h
+++ b/libusb/libusbi.h
@@ -39,10 +39,10 @@
 	struct list_head *prev, *next;
 };
 
-/* Get an entry from the list 
- * 	ptr - the address of this list_head element in "type" 
+/* Get an entry from the list
+ * 	ptr - the address of this list_head element in "type"
  * 	type - the data type that contains "member"
- * 	member - the list_head element in "type" 
+ * 	member - the list_head element in "type"
  */
 #define list_entry(ptr, type, member) \
 	((type *)((char *)(ptr) - (unsigned long)(&((type *)0L)->member)))
@@ -160,7 +160,7 @@
 	struct list_head open_devs;
 	usbi_mutex_t open_devs_lock;
 
-	/* this is a list of in-flight transfer handles, sorted by timeout 
+	/* this is a list of in-flight transfer handles, sorted by timeout
 	 * expiration. URBs to timeout the soonest are placed at the beginning of
 	 * the list, URBs that will time out later are placed after, and urbs with
 	 * infinite timeout are always placed at the very end. */
@@ -663,7 +663,7 @@
 	 */
 	int (*kernel_driver_active)(struct libusb_device_handle *handle,
 		int interface);
-	
+
 	/* Detach a kernel driver from an interface. Optional.
 	 *
 	 * After detaching a kernel driver, the interface should be available
diff --git a/libusb/os/darwin_usb.c b/libusb/os/darwin_usb.c
index 517b77d..0e65385 100644
--- a/libusb/os/darwin_usb.c
+++ b/libusb/os/darwin_usb.c
@@ -140,7 +140,7 @@
 
   /* No pipe found with the correct endpoint address */
   usbi_warn (HANDLE_CTX(dev_handle), "no pipeRef found with endpoint address 0x%02x.", ep);
-  
+
   return -1;
 }
 
@@ -178,7 +178,7 @@
 
   (*plugInInterface)->Stop(plugInInterface);
   IODestroyPlugInInterface (plugInInterface);
-  
+
   (*(device))->GetLocationID(device, locationp);
 
   return device;
@@ -211,7 +211,7 @@
 
 
 
-static void darwin_devices_detached (void *ptr, io_iterator_t rem_devices) {  
+static void darwin_devices_detached (void *ptr, io_iterator_t rem_devices) {
   struct libusb_context *ctx = (struct libusb_context *)ptr;
   struct libusb_device_handle *handle;
   struct darwin_device_priv *dpriv;
@@ -279,7 +279,7 @@
 					      IOServiceMatching(kIOUSBDeviceClassName),
 					      (IOServiceMatchingCallback)darwin_devices_detached,
 					      (void *)ctx, &libusb_rem_device_iterator);
- 
+
   if (kresult != kIOReturnSuccess) {
     usbi_err (ctx, "could not add hotplug event source: %s", darwin_error_str (kresult));
 
@@ -437,7 +437,7 @@
 
 static int process_new_device (struct libusb_context *ctx, usb_device_t **device, UInt32 locationID, struct discovered_devs **_discdevs) {
   struct darwin_device_priv *priv;
-  struct libusb_device *dev; 
+  struct libusb_device *dev;
   struct discovered_devs *discdevs;
   UInt16                address, idVendor, idProduct;
   UInt8                 bDeviceClass, bDeviceSubClass;
@@ -467,7 +467,7 @@
     req.wIndex        = 0;
     req.wLength       = sizeof(IOUSBDeviceDescriptor);
     req.pData         = &(priv->dev_descriptor);
-    
+
     (*(device))->GetDeviceAddress (device, (USBDeviceAddress *)&address);
     (*(device))->GetDeviceProduct (device, &idProduct);
     (*(device))->GetDeviceVendor (device, &idVendor);
@@ -511,7 +511,7 @@
     }
 
     /**** end: retrieve device descriptors ****/
-    
+
     /* catch buggy hubs (which appear to be virtual). Apple's own USB prober has problems with these devices. */
     if (libusb_le16_to_cpu (priv->dev_descriptor.idProduct) != idProduct) {
       /* not a valid device */
@@ -538,9 +538,9 @@
       ret = LIBUSB_ERROR_NO_MEM;
       break;
     }
-    
+
     *_discdevs = discdevs;
-  
+
     usbi_info (ctx, "found device with address %d at %s", dev->device_address, priv->sys_path);
   } while (0);
 
@@ -558,7 +558,7 @@
 
   if (!libusb_darwin_mp)
     return LIBUSB_ERROR_INVALID_PARAM;
-  
+
   kresult = usb_setup_device_iterator (&deviceIterator);
   if (kresult != kIOReturnSuccess)
     return darwin_to_libusb (kresult);
@@ -670,7 +670,7 @@
 	usbi_err (HANDLE_CTX (dev_handle), "USBDeviceClose: %s", darwin_error_str(kresult));
       }
     }
-  
+
     kresult = (*(dpriv->device))->Release(dpriv->device);
     if (kresult) {
       /* Log the fact that we had a problem closing the file, however failing a
@@ -733,7 +733,7 @@
   io_iterator_t             interface_iterator;
 
   *usbInterfacep = IO_OBJECT_NULL;
-  
+
   /* Setup the Interface Request */
   request.bInterfaceClass    = kIOUSBFindInterfaceDontCare;
   request.bInterfaceSubClass = kIOUSBFindInterfaceDontCare;
@@ -746,10 +746,10 @@
 
   for ( current_interface = 0 ; current_interface <= ifc ; current_interface++ )
     *usbInterfacep = IOIteratorNext(interface_iterator);
-  
+
   /* done with the interface iterator */
   IOObjectRelease(interface_iterator);
-  
+
   return 0;
 }
 
@@ -767,7 +767,7 @@
   int i;
 
   usbi_info (HANDLE_CTX (dev_handle), "building table of endpoints.");
-  
+
   /* retrieve the total number of endpoints on this interface */
   kresult = (*(cInterface->interface))->GetNumEndpoints(cInterface->interface, &numep);
   if (kresult) {
@@ -792,7 +792,7 @@
   }
 
   cInterface->num_endpoints = numep;
-  
+
   return 0;
 }
 
@@ -827,7 +827,7 @@
       usbi_err (HANDLE_CTX (dev_handle), "GetNumberOfConfigurations: %s", darwin_error_str(kresult));
       return darwin_to_libusb(kresult);
     }
-    
+
     if (nConfig < 1) {
       usbi_err (HANDLE_CTX (dev_handle), "GetNumberOfConfigurations: no configurations");
       return LIBUSB_ERROR_OTHER;
@@ -866,7 +866,7 @@
     usbi_err (HANDLE_CTX (dev_handle), "interface not found");
     return LIBUSB_ERROR_NOT_FOUND;
   }
-  
+
   /* get an interface to the device's interface */
   kresult = IOCreatePlugInInterfaceForService (usbInterface, kIOUSBInterfaceUserClientTypeID,
 					       kIOCFPlugInInterfaceID, &plugInInterface, &score);
@@ -882,7 +882,7 @@
 
   /* ignore release error */
   (void)IOObjectRelease (usbInterface);
-  
+
   /* Do the actual claim */
   kresult = (*plugInInterface)->QueryInterface(plugInInterface,
 					       CFUUIDGetUUIDBytes(kIOUSBInterfaceInterfaceID),
@@ -891,7 +891,7 @@
     usbi_err (HANDLE_CTX (dev_handle), "QueryInterface: %s", darwin_error_str(kresult));
     return darwin_to_libusb (kresult);
   }
-  
+
   /* We no longer need the intermediate plug-in */
   (*plugInInterface)->Release(plugInInterface);
 
@@ -945,7 +945,7 @@
 
   /* clean up endpoint data */
   cInterface->num_endpoints = 0;
-  
+
   /* delete the interface's async event source */
   if (cInterface->cfSource) {
     CFRunLoopRemoveSource (libusb_darwin_acfl, cInterface->cfSource, kCFRunLoopDefaultMode);
@@ -1043,7 +1043,7 @@
 
     return darwin_to_libusb (kresult);
   }
-  
+
   driver = IORegistryEntryCreateCFProperty (usbInterface, kIOBundleIdentifierKey, kCFAllocatorDefault, 0);
   IOObjectRelease (usbInterface);
 
@@ -1084,7 +1084,7 @@
 
   /* are we reading or writing? */
   is_read = transfer->endpoint & LIBUSB_ENDPOINT_IN;
-  
+
   if (ep_to_pipeRef (transfer->dev_handle, transfer->endpoint, &pipeRef, &iface) != 0) {
     usbi_err (TRANSFER_CTX (transfer), "endpoint not found on any open interface");
 
@@ -1095,7 +1095,7 @@
 
   (*(cInterface->interface))->GetPipeProperties (cInterface->interface, pipeRef, &direction, &number,
 						 &transferType, &maxPacketSize, &interval);
-  
+
   /* submit the request */
   /* timeouts are unavailable on interrupt endpoints */
   if (transferType == kUSBInterrupt) {
@@ -1139,7 +1139,7 @@
 
   /* are we reading or writing? */
   is_read = transfer->endpoint & LIBUSB_ENDPOINT_IN;
-  
+
   /* construct an array of IOUSBIsocFrames */
   tpriv->isoc_framelist = (IOUSBIsocFrame*) calloc (transfer->num_iso_packets, sizeof(IOUSBIsocFrame));
   if (!tpriv->isoc_framelist)
@@ -1170,7 +1170,7 @@
 
   /* schedule for a frame a little in the future */
   frame += 2;
-	
+
   /* submit the request */
   if (is_read)
     kresult = (*(cInterface->interface))->ReadIsochPipeAsync(cInterface->interface, pipeRef, transfer->buffer, frame,
@@ -1191,7 +1191,7 @@
   return darwin_to_libusb (kresult);
 }
 
-static int submit_control_transfer(struct usbi_transfer *itransfer) {  
+static int submit_control_transfer(struct usbi_transfer *itransfer) {
   struct libusb_transfer *transfer = __USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
   struct libusb_control_setup *setup = (struct libusb_control_setup *) transfer->buffer;
   struct darwin_device_priv *dpriv = (struct darwin_device_priv *)transfer->dev_handle->dev->os_priv;
@@ -1218,7 +1218,7 @@
 
   if (kresult != kIOReturnSuccess)
     usbi_err (TRANSFER_CTX (transfer), "control request failed: %s", darwin_error_str(kresult));
-  
+
   return darwin_to_libusb (kresult);
 }
 
@@ -1270,7 +1270,7 @@
 
   /* abort transactions */
   (*(cInterface->interface))->AbortPipe (cInterface->interface, pipeRef);
-  
+
   usbi_info (ITRANSFER_CTX (itransfer), "calling clear pipe stall to clear the data toggle bit");
 
   /* clear the data toggle bit */
@@ -1426,7 +1426,7 @@
 
       usbi_remove_pollfd(HANDLE_CTX(handle), hpriv->fds[0]);
       usbi_handle_disconnect(handle);
-      
+
       /* done with this device */
       continue;
     case MESSAGE_ASYNC_IO_COMPLETE:
diff --git a/libusb/sync.c b/libusb/sync.c
index bd4d970..a978b47 100644
--- a/libusb/sync.c
+++ b/libusb/sync.c
@@ -80,7 +80,7 @@
 
 	if (!transfer)
 		return LIBUSB_ERROR_NO_MEM;
-	
+
 	buffer = malloc(LIBUSB_CONTROL_SETUP_SIZE + wLength);
 	if (!buffer) {
 		libusb_free_transfer(transfer);