Fast version of dynamic_cast for MWClass

apps/openmw/mwclass/container.cpp

@@ -27,23 +27,26 @@
 
 #include "../mwmechanics/npcstats.hpp"
 
-namespace
+namespace MWClass
 {
-    struct ContainerCustomData : public MWWorld::CustomData
+    class ContainerCustomData : public MWWorld::CustomData
     {
+    public:
         MWWorld::ContainerStore mContainerStore;
 
         virtual MWWorld::CustomData *clone() const;
+
+        virtual ContainerCustomData& asContainerCustomData()
+        {
+            return *this;
+        }
     };
 
     MWWorld::CustomData *ContainerCustomData::clone() const
     {
         return new ContainerCustomData (*this);
     }
-}
 
-namespace MWClass
-{
     std::string Container::getId (const MWWorld::Ptr& ptr) const
     {
         return ptr.get<ESM::Container>()->mBase->mId;
@@ -202,7 +205,7 @@ namespace MWClass
     {
         ensureCustomData (ptr);
 
-        return dynamic_cast<ContainerCustomData&> (*ptr.getRefData().getCustomData()).mContainerStore;
+        return ptr.getRefData().getCustomData()->asContainerCustomData().mContainerStore;
     }
 
     std::string Container::getScript (const MWWorld::Ptr& ptr) const

apps/openmw/mwclass/creature.cpp

@@ -40,14 +40,29 @@
 
 namespace
 {
-    struct CreatureCustomData : public MWWorld::CustomData
+    bool isFlagBitSet(const MWWorld::Ptr &ptr, ESM::Creature::Flags bitMask)
+    {
+        return (ptr.get<ESM::Creature>()->mBase->mFlags & bitMask) != 0;
+    }
+}
+
+namespace MWClass
+{
+
+    class CreatureCustomData : public MWWorld::CustomData
     {
+    public:
         MWMechanics::CreatureStats mCreatureStats;
         MWWorld::ContainerStore* mContainerStore; // may be InventoryStore for some creatures
         MWMechanics::Movement mMovement;
 
         virtual MWWorld::CustomData *clone() const;
 
+        virtual CreatureCustomData& asCreatureCustomData()
+        {
+            return *this;
+        }
+
         CreatureCustomData() : mContainerStore(0) {}
         virtual ~CreatureCustomData() { delete mContainerStore; }
     };
@@ -59,14 +74,6 @@ namespace
         return cloned;
     }
 
-    bool isFlagBitSet(const MWWorld::Ptr &ptr, ESM::Creature::Flags bitMask)
-    {
-        return (ptr.get<ESM::Creature>()->mBase->mFlags & bitMask) != 0;
-    }
-}
-
-namespace MWClass
-{
     const Creature::GMST& Creature::getGmst()
     {
         static GMST gmst;
@@ -193,7 +200,7 @@ namespace MWClass
     {
         ensureCustomData (ptr);
 
-        return dynamic_cast<CreatureCustomData&> (*ptr.getRefData().getCustomData()).mCreatureStats;
+        return ptr.getRefData().getCustomData()->asCreatureCustomData().mCreatureStats;
     }
 
 
@@ -421,7 +428,7 @@ namespace MWClass
     {
         ensureCustomData (ptr);
 
-        return *dynamic_cast<CreatureCustomData&> (*ptr.getRefData().getCustomData()).mContainerStore;
+        return *ptr.getRefData().getCustomData()->asCreatureCustomData().mContainerStore;
     }
 
     MWWorld::InventoryStore& Creature::getInventoryStore(const MWWorld::Ptr &ptr) const
@@ -511,7 +518,7 @@ namespace MWClass
     {
         ensureCustomData (ptr);
 
-        return dynamic_cast<CreatureCustomData&> (*ptr.getRefData().getCustomData()).mMovement;
+        return ptr.getRefData().getCustomData()->asCreatureCustomData().mMovement;
     }
 
     MWGui::ToolTipInfo Creature::getToolTipInfo (const MWWorld::Ptr& ptr) const
@@ -711,7 +718,7 @@ namespace MWClass
         else
             ensureCustomData(ptr); // in openmw 0.30 savegames not all state was saved yet, so need to load it regardless.
 
-        CreatureCustomData& customData = dynamic_cast<CreatureCustomData&> (*ptr.getRefData().getCustomData());
+        CreatureCustomData& customData = ptr.getRefData().getCustomData()->asCreatureCustomData();
 
         customData.mContainerStore->readState (state2.mInventory);
         customData.mCreatureStats.readState (state2.mCreatureStats);
@@ -730,7 +737,7 @@ namespace MWClass
 
         ensureCustomData (ptr);
 
-        CreatureCustomData& customData = dynamic_cast<CreatureCustomData&> (*ptr.getRefData().getCustomData());
+        CreatureCustomData& customData = ptr.getRefData().getCustomData()->asCreatureCustomData();
 
         customData.mContainerStore->writeState (state2.mInventory);
         customData.mCreatureStats.writeState (state2.mCreatureStats);

apps/openmw/mwclass/creaturelevlist.cpp

@@ -7,25 +7,28 @@
 
 #include "../mwworld/customdata.hpp"
 
-namespace
+namespace MWClass
 {
-    struct CreatureLevListCustomData : public MWWorld::CustomData
+    class CreatureLevListCustomData : public MWWorld::CustomData
     {
+    public:
         // actorId of the creature we spawned
         int mSpawnActorId;
         bool mSpawn; // Should a new creature be spawned?
 
         virtual MWWorld::CustomData *clone() const;
+
+        virtual CreatureLevListCustomData& asCreatureLevListCustomData()
+        {
+            return *this;
+        }
     };
 
     MWWorld::CustomData *CreatureLevListCustomData::clone() const
     {
         return new CreatureLevListCustomData (*this);
     }
-}
 
-namespace MWClass
-{
     std::string CreatureLevList::getId (const MWWorld::Ptr& ptr) const
     {
         return ptr.get<ESM::CreatureLevList>()->mBase->mId;
@@ -40,7 +43,7 @@ namespace MWClass
     {
         ensureCustomData(ptr);
 
-        CreatureLevListCustomData& customData = dynamic_cast<CreatureLevListCustomData&> (*ptr.getRefData().getCustomData());
+        CreatureLevListCustomData& customData = ptr.getRefData().getCustomData()->asCreatureLevListCustomData();
         customData.mSpawn = true;
     }
 
@@ -55,7 +58,7 @@ namespace MWClass
     {
         ensureCustomData(ptr);
 
-        CreatureLevListCustomData& customData = dynamic_cast<CreatureLevListCustomData&> (*ptr.getRefData().getCustomData());
+        CreatureLevListCustomData& customData = ptr.getRefData().getCustomData()->asCreatureLevListCustomData();
         if (!customData.mSpawn)
             return;
 
@@ -104,7 +107,7 @@ namespace MWClass
         const ESM::CreatureLevListState& state2 = dynamic_cast<const ESM::CreatureLevListState&> (state);
 
         ensureCustomData(ptr);
-        CreatureLevListCustomData& customData = dynamic_cast<CreatureLevListCustomData&> (*ptr.getRefData().getCustomData());
+        CreatureLevListCustomData& customData = ptr.getRefData().getCustomData()->asCreatureLevListCustomData();
         customData.mSpawnActorId = state2.mSpawnActorId;
         customData.mSpawn = state2.mSpawn;
     }
@@ -115,7 +118,7 @@ namespace MWClass
         ESM::CreatureLevListState& state2 = dynamic_cast<ESM::CreatureLevListState&> (state);
 
         ensureCustomData(ptr);
-        CreatureLevListCustomData& customData = dynamic_cast<CreatureLevListCustomData&> (*ptr.getRefData().getCustomData());
+        CreatureLevListCustomData& customData = ptr.getRefData().getCustomData()->asCreatureLevListCustomData();
         state2.mSpawnActorId = customData.mSpawnActorId;
         state2.mSpawn = customData.mSpawn;
     }

apps/openmw/mwclass/door.cpp

@@ -28,23 +28,26 @@
 
 #include "../mwmechanics/actorutil.hpp"
 
-namespace
+namespace MWClass
 {
-    struct DoorCustomData : public MWWorld::CustomData
+    class DoorCustomData : public MWWorld::CustomData
     {
+    public:
         int mDoorState; // 0 = nothing, 1 = opening, 2 = closing
 
         virtual MWWorld::CustomData *clone() const;
+
+        virtual DoorCustomData& asDoorCustomData()
+        {
+            return *this;
+        }
     };
 
     MWWorld::CustomData *DoorCustomData::clone() const
     {
         return new DoorCustomData (*this);
     }
-}
 
-namespace MWClass
-{
     std::string Door::getId (const MWWorld::Ptr& ptr) const
     {
         return ptr.get<ESM::Door>()->mBase->mId;
@@ -65,7 +68,7 @@ namespace MWClass
         // Resume the door's opening/closing animation if it wasn't finished
         if (ptr.getRefData().getCustomData())
         {
-            const DoorCustomData& customData = dynamic_cast<const DoorCustomData&>(*ptr.getRefData().getCustomData());
+            const DoorCustomData& customData = ptr.getRefData().getCustomData()->asDoorCustomData();
             if (customData.mDoorState > 0)
             {
                 MWBase::Environment::get().getWorld()->activateDoor(ptr, customData.mDoorState);
@@ -324,7 +327,7 @@ namespace MWClass
     int Door::getDoorState (const MWWorld::Ptr &ptr) const
     {
         ensureCustomData(ptr);
-        const DoorCustomData& customData = dynamic_cast<const DoorCustomData&>(*ptr.getRefData().getCustomData());
+        const DoorCustomData& customData = ptr.getRefData().getCustomData()->asDoorCustomData();
         return customData.mDoorState;
     }
 
@@ -334,14 +337,14 @@ namespace MWClass
             throw std::runtime_error("load doors can't be moved");
 
         ensureCustomData(ptr);
-        DoorCustomData& customData = dynamic_cast<DoorCustomData&>(*ptr.getRefData().getCustomData());
+        DoorCustomData& customData = ptr.getRefData().getCustomData()->asDoorCustomData();
         customData.mDoorState = state;
     }
 
     void Door::readAdditionalState (const MWWorld::Ptr& ptr, const ESM::ObjectState& state) const
     {
         ensureCustomData(ptr);
-        DoorCustomData& customData = dynamic_cast<DoorCustomData&>(*ptr.getRefData().getCustomData());
+        DoorCustomData& customData = ptr.getRefData().getCustomData()->asDoorCustomData();
 
         const ESM::DoorState& state2 = dynamic_cast<const ESM::DoorState&>(state);
         customData.mDoorState = state2.mDoorState;
@@ -350,7 +353,7 @@ namespace MWClass
     void Door::writeAdditionalState (const MWWorld::Ptr& ptr, ESM::ObjectState& state) const
     {
         ensureCustomData(ptr);
-        const DoorCustomData& customData = dynamic_cast<const DoorCustomData&>(*ptr.getRefData().getCustomData());
+        const DoorCustomData& customData = ptr.getRefData().getCustomData()->asDoorCustomData();
 
         ESM::DoorState& state2 = dynamic_cast<ESM::DoorState&>(state);
         state2.mDoorState = customData.mDoorState;

apps/openmw/mwclass/npc.cpp

@@ -42,19 +42,6 @@
 
 namespace
 {
-    struct NpcCustomData : public MWWorld::CustomData
-    {
-        MWMechanics::NpcStats mNpcStats;
-        MWMechanics::Movement mMovement;
-        MWWorld::InventoryStore mInventoryStore;
-
-        virtual MWWorld::CustomData *clone() const;
-    };
-
-    MWWorld::CustomData *NpcCustomData::clone() const
-    {
-        return new NpcCustomData (*this);
-    }
 
     int is_even(double d) {
         double int_part;
@@ -251,6 +238,27 @@ namespace
 
 namespace MWClass
 {
+
+    class NpcCustomData : public MWWorld::CustomData
+    {
+    public:
+        MWMechanics::NpcStats mNpcStats;
+        MWMechanics::Movement mMovement;
+        MWWorld::InventoryStore mInventoryStore;
+
+        virtual MWWorld::CustomData *clone() const;
+
+        virtual NpcCustomData& asNpcCustomData()
+        {
+            return *this;
+        }
+    };
+
+    MWWorld::CustomData *NpcCustomData::clone() const
+    {
+        return new NpcCustomData (*this);
+    }
+
     const Npc::GMST& Npc::getGmst()
     {
         static GMST gmst;
@@ -446,14 +454,14 @@ namespace MWClass
     {
         ensureCustomData (ptr);
 
-        return dynamic_cast<NpcCustomData&> (*ptr.getRefData().getCustomData()).mNpcStats;
+        return ptr.getRefData().getCustomData()->asNpcCustomData().mNpcStats;
     }
 
     MWMechanics::NpcStats& Npc::getNpcStats (const MWWorld::Ptr& ptr) const
     {
         ensureCustomData (ptr);
 
-        return dynamic_cast<NpcCustomData&> (*ptr.getRefData().getCustomData()).mNpcStats;
+        return ptr.getRefData().getCustomData()->asNpcCustomData().mNpcStats;
     }
 
 
@@ -780,7 +788,7 @@ namespace MWClass
     {
         ensureCustomData (ptr);
 
-        return dynamic_cast<NpcCustomData&> (*ptr.getRefData().getCustomData()).mInventoryStore;
+        return ptr.getRefData().getCustomData()->asNpcCustomData().mInventoryStore;
     }
 
     MWWorld::InventoryStore& Npc::getInventoryStore (const MWWorld::Ptr& ptr)
@@ -788,7 +796,7 @@ namespace MWClass
     {
         ensureCustomData (ptr);
 
-        return dynamic_cast<NpcCustomData&> (*ptr.getRefData().getCustomData()).mInventoryStore;
+        return ptr.getRefData().getCustomData()->asNpcCustomData().mInventoryStore;
     }
 
     std::string Npc::getScript (const MWWorld::Ptr& ptr) const
@@ -897,7 +905,7 @@ namespace MWClass
     {
         ensureCustomData (ptr);
 
-        return dynamic_cast<NpcCustomData&> (*ptr.getRefData().getCustomData()).mMovement;
+        return ptr.getRefData().getCustomData()->asNpcCustomData().mMovement;
     }
 
     bool Npc::isEssential (const MWWorld::Ptr& ptr) const
@@ -1161,7 +1169,7 @@ namespace MWClass
         else
             ensureCustomData(ptr); // in openmw 0.30 savegames not all state was saved yet, so need to load it regardless.
 
-        NpcCustomData& customData = dynamic_cast<NpcCustomData&> (*ptr.getRefData().getCustomData());
+        NpcCustomData& customData = ptr.getRefData().getCustomData()->asNpcCustomData();
 
         customData.mInventoryStore.readState (state2.mInventory);
         customData.mNpcStats.readState (state2.mNpcStats);
@@ -1181,7 +1189,7 @@ namespace MWClass
 
         ensureCustomData (ptr);
 
-        NpcCustomData& customData = dynamic_cast<NpcCustomData&> (*ptr.getRefData().getCustomData());
+        NpcCustomData& customData = ptr.getRefData().getCustomData()->asNpcCustomData();
 
         customData.mInventoryStore.writeState (state2.mInventory);
         customData.mNpcStats.writeState (state2.mNpcStats);

apps/openmw/mwworld/customdata.cpp

@@ -0,0 +1,46 @@
+#include "customdata.hpp"
+
+#include <stdexcept>
+#include <sstream>
+#include <typeinfo>
+
+namespace MWWorld
+{
+
+MWClass::CreatureCustomData &CustomData::asCreatureCustomData()
+{
+    std::stringstream error;
+    error << "bad cast " << typeid(this).name() << " to CreatureCustomData";
+    throw std::logic_error(error.str());
+}
+
+MWClass::NpcCustomData &CustomData::asNpcCustomData()
+{
+    std::stringstream error;
+    error << "bad cast " << typeid(this).name() << " to NpcCustomData";
+    throw std::logic_error(error.str());
+}
+
+MWClass::ContainerCustomData &CustomData::asContainerCustomData()
+{
+    std::stringstream error;
+    error << "bad cast " << typeid(this).name() << " to ContainerCustomData";
+    throw std::logic_error(error.str());
+}
+
+MWClass::DoorCustomData &CustomData::asDoorCustomData()
+{
+    std::stringstream error;
+    error << "bad cast " << typeid(this).name() << " to DoorCustomData";
+    throw std::logic_error(error.str());
+}
+
+MWClass::CreatureLevListCustomData &CustomData::asCreatureLevListCustomData()
+{
+    std::stringstream error;
+    error << "bad cast " << typeid(this).name() << " to CreatureLevListCustomData";
+    throw std::logic_error(error.str());
+}
+
+
+}

apps/openmw/mwworld/customdata.hpp

@@ -1,6 +1,15 @@
 #ifndef GAME_MWWORLD_CUSTOMDATA_H
 #define GAME_MWWORLD_CUSTOMDATA_H
 
+namespace MWClass
+{
+    class CreatureCustomData;
+    class NpcCustomData;
+    class ContainerCustomData;
+    class DoorCustomData;
+    class CreatureLevListCustomData;
+}
+
 namespace MWWorld
 {
     /// \brief Base class for the MW-class-specific part of RefData
@@ -11,6 +20,18 @@ namespace MWWorld
             virtual ~CustomData() {}
 
             virtual CustomData *clone() const = 0;
+
+            // Fast version of dynamic_cast<X&>. Needs to be overridden in the respective class.
+
+            virtual MWClass::CreatureCustomData& asCreatureCustomData();
+
+            virtual MWClass::NpcCustomData& asNpcCustomData();
+
+            virtual MWClass::ContainerCustomData& asContainerCustomData();
+
+            virtual MWClass::DoorCustomData& asDoorCustomData();
+
+            virtual MWClass::CreatureLevListCustomData& asCreatureLevListCustomData();
     };
 }