C++ PairStream::getFirstItem方法代码示例

// Get the next free bomb of type 'bombType'
Bomb* SimpleStoresMgr::getSpecificBomb(const Basic::String* const bombType)
{
   Bomb* bomb = 0;
   if (bombType != 0)  {

      Basic::PairStream* list = getWeapons();
      if (list != 0)  {

         // Find the first free (inactive) bomb
         Basic::List::Item* item = list->getFirstItem();
         while (item != 0 && bomb == 0) {
            Basic::Pair* pair = (Basic::Pair*)(item->getValue());
            Bomb* p = dynamic_cast<Bomb*>( pair->object() );
            if (p != 0 && p->isInactive()) {
               // Ok, we have a bomb, but is it the type we want?
               if (*p->getType() == *bombType) {
                  p->ref();
                  bomb = p;
               }
            }
            item = item->getNext();
         }

         list->unref();
      }

   }
   return bomb;
}

// Default external equipment jettison event handler
bool Stores::onJettisonEvent(ExternalStore* const sys)
{
   bool ok = false;
   if (sys != 0) {

      Basic::PairStream* list = getStores();
      if (list != 0) {

         // First, make sure it's one of ours!
         bool found = false;
         Basic::List::Item* item = list->getFirstItem();
         while (item != 0 && !found) {
            Basic::Pair* pair = static_cast<Basic::Pair*>(item->getValue());
            found = (sys == pair->object());  // is it a match?
            item = item->getNext();
         }

         if (found) {
            // Send a jettison event to the system
            ok = sys->event(JETTISON_EVENT);
         }

         list->unref();
         list = 0;
      }
   }
   return ok;
}

// Get the next free weapon of this 'type'
Weapon* SimpleStoresMgr::getSpecificWeapon(const std::type_info& type)
{
   Weapon* wpn = 0;
   if (&type != 0) {

      Basic::PairStream* list = getWeapons();
      if (list != 0) {

         // Find the first free (inactive) bomb
         Basic::List::Item* item = list->getFirstItem();
         while (item != 0 && wpn == 0) {
            Basic::Pair* pair = (Basic::Pair*)(item->getValue());
            Weapon* p = dynamic_cast<Weapon*>( pair->object() );
            if (p != 0 && p->isInactive() && p->isClassType(type)) {
               p->ref();
               wpn = p;
            }
            item = item->getNext();
         }

         list->unref();
      }

   }
   return wpn;
}

//------------------------------------------------------------------------------
// setSlotReversed() -- 
//------------------------------------------------------------------------------                          
bool Field::setSlotReversed(const Basic::Number* const srobj)
{
   
    if (srobj != 0) {

        // Set our mode
        if (srobj->getBoolean()) {
            setDisplayMode(reversed);
            setDisplayMode(reversed1);
        }
        else {
            clearDisplayMode(reversed);
            clearDisplayMode(reversed1);
        }

        // Set our children's mode
        Basic::PairStream* subcomponents = getComponents();
        if (subcomponents != 0) {

            const Basic::List::Item* item = subcomponents->getFirstItem();
            while (item != 0) {
                Basic::Pair* p = (Basic::Pair*) item->getValue();
                Field* child = dynamic_cast<Field*>(p->object());
                if (child != 0) child->setSlotReversed(srobj);
                item = item->getNext();
            }

            subcomponents->unref();
            subcomponents = 0;
        }
    }
    return true;
}

// Get the next free missile of type 'missileType'
Missile* SimpleStoresMgr::getSpecificMissile(const Basic::String* const missileType)
{
   Missile* msl = 0;
   if (missileType != 0) {

      Basic::PairStream* list = getWeapons();
      if (list != 0) {

         // Find the first free (inactive) missile of type weaponType
         Basic::List::Item* item = list->getFirstItem();
         while (item != 0 && msl == 0) {
            Basic::Pair* pair = (Basic::Pair*)(item->getValue());
            Missile* p = dynamic_cast<Missile*>( pair->object() );
            if (p != 0 && p->isInactive()) {
               // Ok, we have a missile, but is it the type we want?
               if (*p->getType() == *missileType) {
                  p->ref();
                  msl = p;
               }
            }
            item = item->getNext();
         }

         list->unref();
      }

   }
   return msl;
}

//------------------------------------------------------------------------------
// setSlotHighlight() -- 
//------------------------------------------------------------------------------                          
bool Field::setSlotHighlight(const Basic::Number* const shobj)
{
    if (shobj != 0) {
        // Set our mode
        if (shobj->getBoolean()) {
            setDisplayMode(highlight);
            setDisplayMode(highlight1);
        }
        else {
            setDisplayMode(highlight);
            setDisplayMode(highlight1);
        }

        Basic::PairStream* subcomponents = getComponents();
        if (subcomponents != 0) {

            const Basic::List::Item* item = subcomponents->getFirstItem();
            while (item != 0) {
                Basic::Pair* p = (Basic::Pair*) item->getValue();
                Field* child = dynamic_cast<Field*>(p->object());
                if (child != 0) child->setSlotHighlight(shobj); //changed from obj
                item = item->getNext();
            }

            subcomponents->unref();
            subcomponents = 0;
        }
    }
    return true;
}   

//------------------------------------------------------------------------------
// stepOwnshipPlayer() -- Step to the next local player
//------------------------------------------------------------------------------
void SimStation::stepOwnshipPlayer()
{
   Basic::PairStream* pl = getSimulation()->getPlayers();
   if (pl != nullptr) {

      Simulation::Player* f = nullptr;
      Simulation::Player* n = nullptr;
      bool found = false;

      // Find the next player
      Basic::List::Item* item = pl->getFirstItem();
      while (item != nullptr) {
         Basic::Pair* pair = static_cast<Basic::Pair*>(item->getValue());
         if (pair != nullptr) {
            Simulation::Player* ip = static_cast<Simulation::Player*>(pair->object());
            if ( ip->isMode(Simulation::Player::ACTIVE) &&
               ip->isLocalPlayer() &&
               ip->isClassType(typeid(Simulation::AirVehicle))
               ) {
                  if (f == nullptr) { f = ip; }  // Remember the first
                  if (found)        { n = ip; ; break; }
                  if (ip == getOwnship()) found = true;
            }
         }
         item = item->getNext();
      }
      if (found && n == nullptr) n = f;
      if (n != nullptr) setOwnshipPlayer(n);

      pl->unref();
    }
}

//------------------------------------------------------------------------------
// updateData()
//------------------------------------------------------------------------------
void Instrument::updateData(const LCreal dt)
{
   // update our base class
   BaseClass::updateData(dt);

   // check for a color rotary, just in case we need one
   BasicGL::ColorRotary* cr = dynamic_cast<BasicGL::ColorRotary*>(getColor());
   if (cr != 0) cr->determineColor(preScaleInstVal);

   // only tell the rest of our instruments our value if we want them to know it
   if (allowPassing) {
      // sort out the instruments from our components
      Basic::PairStream* ps = getComponents();
      if (ps != 0) {
         Basic::List::Item* item = ps->getFirstItem();
         while(item != 0) {
            Basic::Pair* pair = (Basic::Pair*) item->getValue();
            if (pair != 0) {
               // send the value down to all of our instrument components
               Instrument* myInst = dynamic_cast<Instrument*>(pair->object());
               Basic::Number n = preScaleInstVal;
               if (myInst != 0) myInst->event(UPDATE_INSTRUMENTS, &n);
            }
            item = item->getNext();
         }
         ps->unref();
         ps = 0;
      }
   }
}

//------------------------------------------------------------------------------
// Compute nav steering data for each steerpoint.
//------------------------------------------------------------------------------
void Route::computeSteerpointData(const LCreal, const Navigation* const nav)
{
   if (nav != nullptr) {
      Basic::PairStream* steerpoints = getComponents();
      if (steerpoints != nullptr) {

         // Until we pass the 'to' steerpoint, the 'from' pointer will be
         // null(0) and the steerpoint's compute() function will compute
         // direct-to the steerpoint.  After the 'to' steerpoint, the 'from'
         // pointer will help compute each from-to leg of the route.
         Steerpoint* from = nullptr;

         Basic::List::Item* item = steerpoints->getFirstItem();
         while (item != nullptr) {
            Basic::Pair* pair = static_cast<Basic::Pair*>(item->getValue());
            Steerpoint* stpt = static_cast<Steerpoint*>(pair->object());
            stpt->compute(nav,from);
            if (pair == to || from != nullptr) from = stpt;
            item = item->getNext();
         }

         steerpoints->unref();
         steerpoints = nullptr;
      }
   }
}

//------------------------------------------------------------------------------
// Set slot functions
//------------------------------------------------------------------------------
bool StoresMgr::setSlotStores(const Basic::PairStream* const msg)
{
   // First let our base class do everything that it needs to.
   BaseClass::setSlotStores(msg);

   // ---
   // Clear all previous stores and assigned weapons
   // ---
   weaponsList = 0;
   externalList = 0;
   fuelList = 0;
   gunPtr = 0;

   // ---
   // Use the stores list that the Stores class just processed.
   Basic::PairStream* stores = getStores();
   if (stores != 0){

      // Create the new weapons list that contains all weapons
      {
         Basic::PairStream* newWeapons = new Basic::PairStream();
         searchAndAdd(stores, typeid(Weapon), newWeapons);
         if (newWeapons->entries() > 0) weaponsList = newWeapons;
         newWeapons->unref();
      }

      // Create the new external stores list that contains all
      // non-weapon, external stores (e.g., fuel tanks, pods, guns)
      {
         Basic::PairStream* newExternal = new Basic::PairStream();
         searchAndAdd(stores, typeid(ExternalStore), newExternal);
         if (newExternal->entries() > 0) externalList = newExternal;
         newExternal->unref();
      }

      // Create the new fuel tank list that contains all fuel tanks
      {
         Basic::PairStream* newFuel = new Basic::PairStream();
         searchAndAdd(stores, typeid(FuelTank), newFuel);
         if (newFuel->entries() > 0) fuelList = newFuel;
         newFuel->unref();
      }

      // Find the primary gun; i.e., the first gun found on our stores
      Basic::List::Item* item = stores->getFirstItem();
      while (item != 0 && gunPtr == 0) {
         Basic::Pair* pair = (Basic::Pair*)(item->getValue());

         Gun* p = dynamic_cast<Gun*>( pair->object() );
         if (p != 0) gunPtr = p;

         item = item->getNext();
      }

      stores->unref();
      stores = 0;
   }

   return true;
}

//------------------------------------------------------------------------------
// getSteerpoints() -- Get the route we're flying to (starting at 'to')
//------------------------------------------------------------------------------
unsigned int Route::getSteerpoints(Basic::safe_ptr<Steerpoint>* const stptList, const unsigned int max)
{
    unsigned int i = 0;
    Basic::PairStream* steerpoints = getComponents();
    if (stptList != nullptr && max > 0 && steerpoints != nullptr) {

        // Find our 'to' steerpoint
        bool found = false;
        Basic::List::Item* item = steerpoints->getFirstItem();
        while (item != nullptr && !found) {
            Basic::Pair* pair = static_cast<Basic::Pair*>(item->getValue());
            found = (pair == to);
            if (!found) {
                item = item->getNext();
            }
        }

        // Get the route we're flying 'to'
        while (item != nullptr && i < max) {
            Basic::Pair* pair = static_cast<Basic::Pair*>(item->getValue());
            Steerpoint* p = dynamic_cast<Steerpoint*>(pair->object());
            if (p != nullptr) {
                stptList[i++] = p;
            }
            item = item->getNext();
        }
    }

    if (steerpoints != nullptr) {
       steerpoints->unref();
       steerpoints = nullptr;
    }

    return i;
}

// Default weapon jettison event handler
bool Stores::onJettisonEvent(Weapon* const wpn)
{
   bool ok = false;
   if (wpn != nullptr) {

      Basic::PairStream* list = getStores();
      if (list != nullptr) {

         // First, make sure it's one of ours!
         bool found = false;
         Basic::List::Item* item = list->getFirstItem();
         while (item != nullptr && !found) {
            Basic::Pair* pair = static_cast<Basic::Pair*>(item->getValue());
            found = (wpn == pair->object());  // is it a match?
            item = item->getNext();
         }

         if (found) {
            // Send a jettison event to the weapon
            ok = wpn->event(JETTISON_EVENT);
         }

         list->unref();
         list = nullptr;
      }
   }
   return ok;
}

//------------------------------------------------------------------------------
// setOwnshipPlayer() -- set this player as our ownship
//------------------------------------------------------------------------------
bool Station::setOwnshipPlayer(Player* const newOS)
{
    // Is it already own ownship?  Yes, then nothing else to do.
    if (newOS == ownship) return true;

    // When we're just setting a null(0) ownship ...
    if (newOS == 0) {
        // Unref the old player
        if (ownshipName != 0) { ownshipName->unref(); ownshipName = 0; }
        if (ownship != 0) {
            ownship->event(ON_OWNSHIP_DISCONNECT);
            ownship->unref();
            ownship = 0;
        }
        return true;
    }

    // Look for this ownship in our list of players
    bool set = false;
    Basic::PairStream* pl = sim->getPlayers();
    if (pl != 0) {
        Basic::List::Item* item = pl->getFirstItem();
        while (item != 0 && !set) {
            Basic::Pair* pair = dynamic_cast<Basic::Pair*>(item->getValue());
            if (pair != 0) {
                Player* ip = dynamic_cast<Player*>( pair->object() );
                if (ip == newOS && ip->isLocalPlayer()) {
                    // Unref the old stuff
                    if (ownshipName != 0) { ownshipName->unref(); ownshipName = 0; }
                    if (ownship != 0) {
                        ownship->event(ON_OWNSHIP_DISCONNECT);
                        ownship->unref();
                        ownship = 0;
                    }
                    // Ok, we found the player -- make it our ownship
                    ownship = newOS;
                    ownship->ref();
                    ownshipName = pair->slot();
                    ownshipName->ref();
                    ownship->event(ON_OWNSHIP_CONNECT);
                    set = true;
                }
            }
            item = item->getNext();
        }

        pl->unref();
        pl = 0;
    }
    return set;
}

//------------------------------------------------------------------------------
// killedNotification() -- Default killed notification handler
//------------------------------------------------------------------------------
bool System::killedNotification(Player* const p)
{
   // Just let all of our subcomponents know that we were just killed
   Basic::PairStream* subcomponents = getComponents();
   if(subcomponents != 0) {
      for (Basic::List::Item* item = subcomponents->getFirstItem(); item != 0; item = item->getNext()) {
         Basic::Pair* pair = (Basic::Pair*)(item->getValue());
         Basic::Component* sc = (Basic::Component*) pair->object();
         sc->event(KILL_EVENT, p);
      }
      subcomponents->unref();
      subcomponents = 0;
   }
   return true;
}

// DATALINK_MESSAGE event handler
bool Datalink::onDatalinkMessageEvent(Basic::Object* const msg)
{
   // Just pass it down to all of our subcomponents
   Basic::PairStream* subcomponents = getComponents();
   if (subcomponents != 0) {
      for (Basic::List::Item* item = subcomponents->getFirstItem(); item != 0; item = item->getNext()) {
         Basic::Pair* pair = static_cast<Basic::Pair*>(item->getValue());
         Basic::Component* sc = static_cast<Basic::Component*>(pair->object());
         sc->event(DATALINK_MESSAGE, msg);
      }
      subcomponents->unref();
      subcomponents = 0;
   }
   return true;
}