msgpass.c

clips源代码

           WatchHandler(theEnv,WTRACE,MessageHandlerData(theEnv)->CurrentCore,BEGIN_TRACE);
#endif
         if (CheckHandlerArgCount(theEnv))
           {
#if PROFILING_FUNCTIONS
            StartProfile(theEnv,&profileFrame,
                         &MessageHandlerData(theEnv)->CurrentCore->hnd->usrData,
                         ProfileFunctionData(theEnv)->ProfileConstructs);
#endif

            EvaluateProcActions(theEnv,MessageHandlerData(theEnv)->CurrentCore->hnd->cls->header.whichModule->theModule,
                               MessageHandlerData(theEnv)->CurrentCore->hnd->actions,
                               MessageHandlerData(theEnv)->CurrentCore->hnd->localVarCount,
                               result,UnboundHandlerErr);
#if PROFILING_FUNCTIONS
            EndProfile(theEnv,&profileFrame);
#endif
           }
#if DEBUGGING_FUNCTIONS
         if (MessageHandlerData(theEnv)->CurrentCore->hnd->trace)
           WatchHandler(theEnv,WTRACE,MessageHandlerData(theEnv)->CurrentCore,END_TRACE);
#endif
        }
      else
        CallHandlers(theEnv,result);
     }
   else
     {
      MessageHandlerData(theEnv)->CurrentCore = MessageHandlerData(theEnv)->NextInCore;
      MessageHandlerData(theEnv)->NextInCore = MessageHandlerData(theEnv)->NextInCore->nxt;
#if DEBUGGING_FUNCTIONS
      if (MessageHandlerData(theEnv)->CurrentCore->hnd->trace)
        WatchHandler(theEnv,WTRACE,MessageHandlerData(theEnv)->CurrentCore,BEGIN_TRACE);
#endif
      if (CheckHandlerArgCount(theEnv))
        {
#if PROFILING_FUNCTIONS
        StartProfile(theEnv,&profileFrame,
                     &MessageHandlerData(theEnv)->CurrentCore->hnd->usrData,
                     ProfileFunctionData(theEnv)->ProfileConstructs);
#endif

        EvaluateProcActions(theEnv,MessageHandlerData(theEnv)->CurrentCore->hnd->cls->header.whichModule->theModule,
                            MessageHandlerData(theEnv)->CurrentCore->hnd->actions,
                            MessageHandlerData(theEnv)->CurrentCore->hnd->localVarCount,
                            result,UnboundHandlerErr);
#if PROFILING_FUNCTIONS
         EndProfile(theEnv,&profileFrame);
#endif
        }

#if DEBUGGING_FUNCTIONS
      if (MessageHandlerData(theEnv)->CurrentCore->hnd->trace)
        WatchHandler(theEnv,WTRACE,MessageHandlerData(theEnv)->CurrentCore,END_TRACE);
#endif
     }
   MessageHandlerData(theEnv)->NextInCore = oldNext;
   MessageHandlerData(theEnv)->CurrentCore = oldCurrent;
   if (overridep)
     PopProcParameters(theEnv);
   ProcedureFunctionData(theEnv)->ReturnFlag = FALSE;
  }

/*************************************************************************
  NAME         : FindApplicableOfName
  DESCRIPTION  : Groups all handlers of all types of the specified
                   class of the specified name into the applicable handler
                   list
  INPUTS       : 1) The class address
                 2-3) The tops and bottoms of the four handler type lists:
                      around, before, primary and after
                 4) The message name symbol
  RETURNS      : Nothing useful
  SIDE EFFECTS : Modifies the handler lists to include applicable handlers
  NOTES        : None
 *************************************************************************/
globle void FindApplicableOfName(
  void *theEnv,
  DEFCLASS *cls,
  HANDLER_LINK *tops[4],
  HANDLER_LINK *bots[4],
  SYMBOL_HN *mname)
  {
   register int i;
   register int e;
   HANDLER *hnd;
   unsigned *arr;
   HANDLER_LINK *tmp;

   i = FindHandlerNameGroup(cls,mname);
   if (i == -1)
     return;
   e = ((int) cls->handlerCount) - 1;
   hnd = cls->handlers;
   arr = cls->handlerOrderMap;
   for ( ; i <= e ; i++)
     {
      if (hnd[arr[i]].name != mname)
        break;

      tmp = get_struct(theEnv,messageHandlerLink);
      hnd[arr[i]].busy++;
      IncrementDefclassBusyCount(theEnv,(void *) hnd[arr[i]].cls);
      tmp->hnd = &hnd[arr[i]];
      if (tops[tmp->hnd->type] == NULL)
        {
         tmp->nxt = NULL;
         tops[tmp->hnd->type] = bots[tmp->hnd->type] = tmp;
        }

      else if (tmp->hnd->type == MAFTER)
        {
         tmp->nxt = tops[tmp->hnd->type];
         tops[tmp->hnd->type] = tmp;
        }

      else
        {
         bots[tmp->hnd->type]->nxt = tmp;
         bots[tmp->hnd->type] = tmp;
         tmp->nxt = NULL;
        }
     }
  }

/*************************************************************************
  NAME         : JoinHandlerLinks
  DESCRIPTION  : Joins the queues of different handlers together
  INPUTS       : 1-2) The tops and bottoms of the four handler type lists:
                      around, before, primary and after
                 3) The message name symbol
  RETURNS      : The top of the joined lists, NULL on errors
  SIDE EFFECTS : Links all the handler type lists together, or all the
                   lists are destroyed if there are no primary handlers
  NOTES        : None
 *************************************************************************/
globle HANDLER_LINK *JoinHandlerLinks(
  void *theEnv,
  HANDLER_LINK *tops[4],
  HANDLER_LINK *bots[4],
  SYMBOL_HN *mname)
  {
   register int i;
   HANDLER_LINK *mlink;

   if (tops[MPRIMARY] == NULL)
    {
     PrintNoHandlerError(theEnv,ValueToString(mname));
     for (i = MAROUND ; i <= MAFTER ; i++)
       DestroyHandlerLinks(theEnv,tops[i]);
     SetEvaluationError(theEnv,TRUE);
     return(NULL);
    }

   mlink = tops[MPRIMARY];

   if (tops[MBEFORE] != NULL)
     {
      bots[MBEFORE]->nxt = mlink;
      mlink = tops[MBEFORE];
     }

   if (tops[MAROUND] != NULL)
     {
      bots[MAROUND]->nxt = mlink;
      mlink = tops[MAROUND];
     }

   bots[MPRIMARY]->nxt = tops[MAFTER];

   return(mlink);
  }

/***************************************************
  NAME         : PrintHandlerSlotGetFunction
  DESCRIPTION  : Developer access function for
                 printing direct slot references
                 in message-handlers
  INPUTS       : 1) The logical name of the output
                 2) The bitmap expression
  RETURNS      : Nothing useful
  SIDE EFFECTS : Expression printed
  NOTES        : None
 ***************************************************/
#if IBM_TBC && (! DEVELOPER)
#pragma argsused
#endif
globle void PrintHandlerSlotGetFunction(
  void *theEnv,
  char *logicalName,
  void *theValue)
  {
#if DEVELOPER
   HANDLER_SLOT_REFERENCE *theReference;
   DEFCLASS *theDefclass;
   SLOT_DESC *sd;

   theReference = (HANDLER_SLOT_REFERENCE *) ValueToBitMap(theValue);
   EnvPrintRouter(theEnv,logicalName,"?self:[");
   theDefclass = DefclassData(theEnv)->ClassIDMap[theReference->classID];
   EnvPrintRouter(theEnv,logicalName,ValueToString(theDefclass->header.name));
   EnvPrintRouter(theEnv,logicalName,"]");
   sd = theDefclass->instanceTemplate[theDefclass->slotNameMap[theReference->slotID] - 1];
   EnvPrintRouter(theEnv,logicalName,ValueToString(sd->slotName->name));
#else
#if MAC_MCW || IBM_MCW || MAC_XCD
#pragma unused(theEnv)
#pragma unused(logicalName)
#pragma unused(theValue)
#endif
#endif
  }

/***************************************************
  NAME         : HandlerSlotGetFunction
  DESCRIPTION  : Access function for handling the
                 statically-bound direct slot
                 references in message-handlers
  INPUTS       : 1) The bitmap expression
                 2) A data object buffer
  RETURNS      : TRUE if OK, FALSE
                 on errors
  SIDE EFFECTS : Data object buffer gets value of
                 slot. On errors, buffer gets
                 symbol FALSE, EvaluationError
                 is set and error messages are
                 printed
  NOTES        : It is possible for a handler
                 (attached to a superclass of
                  the currently active instance)
                 containing these static references
                 to be called for an instance
                 which does not contain the slots
                 (e.g., an instance of a subclass
                  where the original slot was
                  no-inherit or the subclass
                  overrode the original slot)
 ***************************************************/
globle intBool HandlerSlotGetFunction(
  void *theEnv,
  void *theValue,
  DATA_OBJECT *theResult)
  {
   HANDLER_SLOT_REFERENCE *theReference;
   DEFCLASS *theDefclass;
   INSTANCE_TYPE *theInstance;
   INSTANCE_SLOT *sp;
   unsigned instanceSlotIndex;

   theReference = (HANDLER_SLOT_REFERENCE *) ValueToBitMap(theValue);
   theInstance = (INSTANCE_TYPE *) ProceduralPrimitiveData(theEnv)->ProcParamArray[0].value;
   theDefclass = DefclassData(theEnv)->ClassIDMap[theReference->classID];

   if (theInstance->garbage)
     {
      StaleInstanceAddress(theEnv,"for slot get",0);
      theResult->type = SYMBOL;
      theResult->value = EnvFalseSymbol(theEnv);
      SetEvaluationError(theEnv,TRUE);
      return(FALSE);
     }

   if (theInstance->cls == theDefclass)
     {
      instanceSlotIndex = theInstance->cls->slotNameMap[theReference->slotID];
      sp = theInstance->slotAddresses[instanceSlotIndex - 1];
     }
   else
     {
      if (theReference->slotID > theInstance->cls->maxSlotNameID)
        goto HandlerGetError;
      instanceSlotIndex = theInstance->cls->slotNameMap[theReference->slotID];
      if (instanceSlotIndex == 0)
        goto HandlerGetError;
      instanceSlotIndex--;
      sp = theInstance->slotAddresses[instanceSlotIndex];
      if (sp->desc->cls != theDefclass)
        goto HandlerGetError;
     }
   theResult->type = (unsigned short) sp->type;
   theResult->value = sp->value;
   if (sp->type == MULTIFIELD)
     {
      theResult->begin = 0;
      SetpDOEnd(theResult,GetInstanceSlotLength(sp));
     }
   return(TRUE);

HandlerGetError:
   EarlySlotBindError(theEnv,theInstance,theDefclass,theReference->slotID);
   theResult->type = SYMBOL;
   theResult->value = EnvFalseSymbol(theEnv);
   SetEvaluationError(theEnv,TRUE);
   return(FALSE);
  }

/***************************************************
  NAME         : PrintHandlerSlotPutFunction
  DESCRIPTION  : Developer access function for
                 printing direct slot bindings
                 in message-handlers
  INPUTS       : 1) The logical name of the output
                 2) The bitmap expression
  RETURNS      : Nothing useful
  SIDE EFFECTS : Expression printed
  NOTES        : None
 ***************************************************/
#if IBM_TBC && (! DEVELOPER)
#pragma argsused
#endif
globle void PrintHandlerSlotPutFunction(
  void *theEnv,
  char *logicalName,
  void *theValue)
  {
#if DEVELOPER
   HANDLER_SLOT_REFERENCE *theReference;
   DEFCLASS *theDefclass;
   SLOT_DESC *sd;

   theReference = (HANDLER_SLOT_REFERENCE *) ValueToBitMap(theValue);
   EnvPrintRouter(theEnv,logicalName,"(bind ?self:[");
   theDefclass = DefclassData(theEnv)->ClassIDMap[theReference->classID];
   EnvPrintRouter(theEnv,logicalName,ValueToString(theDefclass->header.name));
   EnvPrintRouter(theEnv,logicalName,"]");
   sd = theDefclass->instanceTemplate[theDefclass->slotNameMap[theReference->slotID] - 1];
   EnvPrintRouter(theEnv,logicalName,ValueToString(sd->slotName->name));
   if (GetFirstArgument() != NULL)
     {
      EnvPrintRouter(theEnv,logicalName," ");
      PrintExpression(theEnv,logicalName,GetFirstArgument());
     }
   EnvPrintRouter(theEnv,logicalName,")");
#else
#if MAC_MCW || IBM_MCW || MAC_XCD
#pragma unused(theEnv)
#pragma unused(logicalName)
#pragma unused(theValue)
#endif
#endif
  }

/***************************************************
  NAME         : HandlerSlotPutFunction