only check left byte to know if status code is good

opcua/ua/status_codes.py

 #AUTOGENERATED!!!
 
 from opcua.common.uaerrors import UaStatusCodeError
+from opcua.ua import ua_binary as uabin
 
 class StatusCodes(object):
     Good = 0
@@ -473,4 +474,7 @@ def get_name_and_doc(val):
     if val in code_to_name_doc:
         return code_to_name_doc[val]
     else:
-        return 'UnknownUaError', 'Unknown StatusCode value: {}'.format(val)
+        if uabin.test_bit(val, 31):
+            return 'Bad', 'Unknown StatusCode value: {}'.format(val)
+        else:
+            return 'Good', 'Unknown StatusCode value: {}'.format(val)

opcua/ua/uatypes.py

@@ -222,16 +222,17 @@ class StatusCode(FrozenClass):
 
         Use the is_good() method if you do not want an exception.
         """
-        if self.value != 0:
+        if not self.is_good():
             raise UaStatusCodeError(self.value)
 
     def is_good(self):
         """
         return True if status is Good.
         """
-        if self.value == 0:
+        if uabin.test_bit(self.value, 31):
+            return False
+        else:
             return True
-        return False
 
     def __str__(self):
         return 'StatusCode({})'.format(self.name)

schemas/generate_statuscode.py

@@ -22,7 +22,8 @@ if __name__ == "__main__":
     outputfile = open("../opcua/ua/status_codes.py", "w")
     outputfile.write("#AUTOGENERATED!!!\n")
     outputfile.write("\n")
-    outputfile.write("from opcua.common.uaerrors import UAStatusCodeError\n")
+    outputfile.write("from opcua.common.uaerrors import UaStatusCodeError\n")
+    outputfile.write("from opcua.ua import ua_binary as uabin\n")
     #outputfile.write("from enum import Enum\n")
     outputfile.write("\n")
 
@@ -46,7 +47,10 @@ if __name__ == "__main__":
     if val in code_to_name_doc:
         return code_to_name_doc[val]
     else:
-        return 'UnknownUaError', 'Unknown StatusCode value: {}'.format(val)
+        if uabin.test_bit(val, 31):
+            return 'Bad', 'Unknown StatusCode value: {}'.format(val)
+        else:
+            return 'Good', 'Unknown StatusCode value: {}'.format(val)
 """)