Ignore exception if string desc unavailable

Author: manuelbl

java-does-usb/src/main/java/net/codecrete/usb/windows/WindowsUSBDeviceRegistry.java

@@ -8,6 +8,7 @@
 package net.codecrete.usb.windows;
 
 import net.codecrete.usb.USBDevice;
+import net.codecrete.usb.USBException;
 import net.codecrete.usb.common.ForeignMemory;
 import net.codecrete.usb.common.USBDeviceImpl;
 import net.codecrete.usb.common.USBDeviceRegistry;
@@ -347,6 +348,9 @@ private String getStringDescriptor(Addressable hubHandle, int usbPortNumber, int
             var stringDesc = new StringDescriptor(getDescriptor(hubHandle, usbPortNumber, STRING_DESCRIPTOR_TYPE, index,
                     DEFAULT_LANGUAGE, session));
             return stringDesc.string();
+        } catch (USBException e) {
+            System.err.printf("Info: [JavaDoesUSB] failed to retrieve string descriptor %d (%s) - ignoring%n", index, e.getMessage());
+            return null;
         }
     }
 

java-does-usb/src/main/java/net/codecrete/usb/windows/WindowsUSBException.java

@@ -75,9 +75,11 @@ static void throwLastError(String message, Object... args) {
     private static String getErrorMessage(int errorCode) {
         try (var session = MemorySession.openConfined()) {
             var messagePointerHolder = session.allocate(ADDRESS);
-            Kernel32.FormatMessageW(Kernel32.FORMAT_MESSAGE_ALLOCATE_BUFFER()
+            int res = Kernel32.FormatMessageW(Kernel32.FORMAT_MESSAGE_ALLOCATE_BUFFER()
                             | Kernel32.FORMAT_MESSAGE_FROM_SYSTEM() | Kernel32.FORMAT_MESSAGE_IGNORE_INSERTS(),
                     NULL, errorCode, 0, messagePointerHolder, 0, NULL);
+            if (res == 0)
+                return "unspecified error";
             var messagePointer = messagePointerHolder.get(ADDRESS, 0);
             String message = Win.createStringFromSegment(MemorySegment.ofAddress(messagePointer, 4000, session));
             Kernel32.LocalFree(messagePointer);