Register to callback function for external proc

asn1_value_editor/sdlHandler.py

@@ -287,6 +287,8 @@ class sdlHandler(QObject):
         # In the simulation panel, set the buttons to send paramless TC/timers
         self.set_paramless_tc()
         self.set_paramless_tm()
+        # Add handler to callback functions for SDL external procedure calls
+        self.register_external_procedures()
         self.get_sdl_state = getattr(value,
                                      '{}_state'.format(self.proc.processName))
         self.get_sdl_state.restype = ctypes.c_char_p
@@ -599,6 +601,11 @@ class sdlHandler(QObject):
         self.add_to_msc('in', tm_name)
         self.log_area.addItem('Received event "{}"'.format(tm_name))
 
+    def external_proc_handler(self, name, *args):
+        ''' Callback function when an external procedure is called '''
+        self.log_area.addItem('Call to external procedure {}'.format(name))
+
+
     def set_timer(self, name, duration):
         ''' Callback function when the SDL model sets a timer '''
         self.add_to_msc('set', 'SET_{}_{}'.format(name, duration))
@@ -648,6 +655,21 @@ class sdlHandler(QObject):
                                                    .format(each['name']))
                 register_func(self.tm_func)
 
+    def register_external_procedures(self):
+        ''' Once the DLL is loaded, register the external procedures
+        specified in the SDL model and connect them to handling function '''
+        # External procedures have a non-fixed number of parameters
+        # but the first one is always a char string (name of procedure)
+        func = ctypes.CFUNCTYPE(None, ctypes.c_char_p)
+        self.proc_handler = func(self.external_proc_handler)
+        for each in self.proc.procedures:
+            if not each.external:
+                continue
+            register_func = getattr(self.dll, "register_{}"
+                                              .format(each.inputString))
+            register_func(self.proc_handler)
+
+
     def init_timers(self):
         ''' When loading the DLL, initialize timers/set callbacks, etc '''
         # Define a single function to handle all timer SET functions