refactor(Core): replace NULL with nullptr (#4593)

src/server/game/Maps/Map.cpp

@@ -185,11 +185,11 @@ void Map::LoadMap(int gx, int gy, bool reload)
         sScriptMgr->OnUnloadGridMap(this, GridMaps[gx][gy], gx, gy);
 
         delete (GridMaps[gx][gy]);
-        GridMaps[gx][gy] = NULL;
+        GridMaps[gx][gy] = nullptr;
     }
 
     // map file name
-    char* tmp = NULL;
+    char* tmp = nullptr;
     int len = sWorld->GetDataPath().length() + strlen("maps/%03u%02u%02u.map") + 1;
     tmp = new char[len];
     snprintf(tmp, len, (char*)(sWorld->GetDataPath() + "maps/%03u%02u%02u.map").c_str(), GetId(), gx, gy);
@@ -229,7 +229,7 @@ Map::Map(uint32 id, uint32 InstanceId, uint8 SpawnMode, Map* _parent) :
         for (unsigned int j = 0; j < MAX_NUMBER_OF_GRIDS; ++j)
         {
             //z code
-            GridMaps[idx][j] = NULL;
+            GridMaps[idx][j] = nullptr;
             setNGrid(nullptr, idx, j);
         }
     }
@@ -1909,7 +1909,7 @@ GridMap* Map::GetGrid(float x, float y)
     return GridMaps[gx][gy];
 }
 
-float Map::GetWaterOrGroundLevel(uint32 phasemask, float x, float y, float z, float* ground /*= NULL*/, bool /*swim = false*/, float collisionHeight) const
+float Map::GetWaterOrGroundLevel(uint32 phasemask, float x, float y, float z, float* ground /*= nullptr*/, bool /*swim = false*/, float collisionHeight) const
 {
     if (const_cast<Map*>(this)->GetGrid(x, y))
     {
@@ -3056,17 +3056,17 @@ void BattlegroundMap::RemoveAllPlayers()
 
 Player* Map::GetPlayer(uint64 guid)
 {
-    return ObjectAccessor::GetObjectInMap(guid, this, (Player*)NULL);
+    return ObjectAccessor::GetObjectInMap(guid, this, (Player*)nullptr);
 }
 
 Creature* Map::GetCreature(uint64 guid)
 {
-    return ObjectAccessor::GetObjectInMap(guid, this, (Creature*)NULL);
+    return ObjectAccessor::GetObjectInMap(guid, this, (Creature*)nullptr);
 }
 
 GameObject* Map::GetGameObject(uint64 guid)
 {
-    return ObjectAccessor::GetObjectInMap(guid, this, (GameObject*)NULL);
+    return ObjectAccessor::GetObjectInMap(guid, this, (GameObject*)nullptr);
 }
 
 Transport* Map::GetTransport(uint64 guid)
@@ -3080,17 +3080,17 @@ Transport* Map::GetTransport(uint64 guid)
 
 DynamicObject* Map::GetDynamicObject(uint64 guid)
 {
-    return ObjectAccessor::GetObjectInMap(guid, this, (DynamicObject*)NULL);
+    return ObjectAccessor::GetObjectInMap(guid, this, (DynamicObject*)nullptr);
 }
 
 Pet* Map::GetPet(uint64 guid)
 {
-    return ObjectAccessor::GetObjectInMap(guid, this, (Pet*)NULL);
+    return ObjectAccessor::GetObjectInMap(guid, this, (Pet*)nullptr);
 }
 
 Corpse* Map::GetCorpse(uint64 guid)
 {
-    return ObjectAccessor::GetObjectInMap(guid, this, (Corpse*)NULL);
+    return ObjectAccessor::GetObjectInMap(guid, this, (Corpse*)nullptr);
 }
 
 void Map::UpdateIteratorBack(Player* player)

src/server/game/Maps/MapInstanced.cpp

@@ -165,7 +165,7 @@ Map* MapInstanced::CreateInstanceForPlayer(const uint32 mapId, Player* player)
             uint32 newInstanceId = sMapMgr->GenerateInstanceId();
             ASSERT(!FindInstanceMap(newInstanceId)); // pussywizard: instance with new id can't exist
             Difficulty diff = player->GetGroup() ? player->GetGroup()->GetDifficulty(IsRaid()) : player->GetDifficulty(IsRaid());
-            map = CreateInstance(newInstanceId, NULL, diff);
+            map = CreateInstance(newInstanceId, nullptr, diff);
         }
     }
 

src/server/game/Maps/MapInstanced.h

@@ -31,7 +31,7 @@ public:
     Map* FindInstanceMap(uint32 instanceId) const
     {
         InstancedMaps::const_iterator i = m_InstancedMaps.find(instanceId);
-        return(i == m_InstancedMaps.end() ? NULL : i->second);
+        return(i == m_InstancedMaps.end() ? nullptr : i->second);
     }
     bool DestroyInstance(InstancedMaps::iterator& itr);
 

src/server/game/Maps/MapManager.h

@@ -32,7 +32,7 @@ public:
     Map* FindBaseMap(uint32 mapId) const // pussywizard: need this public for movemaps (mmaps)
     {
         MapMapType::const_iterator iter = i_maps.find(mapId);
-        return (iter == i_maps.end() ? NULL : iter->second);
+        return (iter == i_maps.end() ? nullptr : iter->second);
     }
 
     uint32 GetAreaId(uint32 mapid, float x, float y, float z) const

src/server/game/Maps/TransportMgr.cpp

@@ -344,7 +344,7 @@ void TransportMgr::AddPathNodeToTransport(uint32 transportEntry, uint32 timeSeg,
     animNode.Path[timeSeg] = node;
 }
 
-MotionTransport* TransportMgr::CreateTransport(uint32 entry, uint32 guid /*= 0*/, Map* map /*= NULL*/)
+MotionTransport* TransportMgr::CreateTransport(uint32 entry, uint32 guid /*= 0*/, Map* map /*= nullptr*/)
 {
     // instance case, execute GetGameObjectEntry hook
     if (map)