6 files changed, 60 insertions, 0 deletions
diff --git a/src/entities/Building.cpp b/src/entities/Building.cpp
index 3c096636..3217e684 100644
--- a/src/entities/Building.cpp
+++ b/src/entities/Building.cpp
@@ -20,3 +20,25 @@ CBuilding::ReplaceWithNewModel(int32 id)
 		if(m_level == LEVEL_NONE || m_level == CGame::currLevel)
 			CStreaming::RequestModel(id, STREAMFLAGS_DONT_REMOVE);
 }
+
+bool
+IsBuildingPointerValid(CBuilding* pBuilding)
+{
+	if (!pBuilding)
+		return false;
+	if (pBuilding->GetIsATreadable()) {
+		int index = CPools::GetTreadablePool()->GetJustIndex((CTreadable*)pBuilding);
+#ifdef FIX_BUGS
+		return index >= 0 && index < CPools::GetTreadablePool()->GetSize();
+#else
+		return index >= 0 && index <= CPools::GetTreadablePool()->GetSize();
+#endif
+	} else {
+		int index = CPools::GetBuildingPool()->GetJustIndex(pBuilding);
+#ifdef FIX_BUGS
+		return index >= 0 && index < CPools::GetBuildingPool()->GetSize();
+#else
+		return index >= 0 && index <= CPools::GetBuildingPool()->GetSize();
+#endif
+	}
+}
diff --git a/src/entities/Building.h b/src/entities/Building.h
index 29608c10..2c2dfb1f 100644
--- a/src/entities/Building.h
+++ b/src/entities/Building.h
@@ -16,3 +16,5 @@ public:
 
 	virtual bool GetIsATreadable(void) { return false; }
 };
+
+bool IsBuildingPointerValid(CBuilding*);
diff --git a/src/entities/Dummy.cpp b/src/entities/Dummy.cpp
index 8a4bfd5f..92b69761 100644
--- a/src/entities/Dummy.cpp
+++ b/src/entities/Dummy.cpp
@@ -50,3 +50,18 @@ CDummy::Remove(void)
 		m_entryInfoList.DeleteNode(node);
 	}
 }
+
+bool
+IsDummyPointerValid(CDummy* pDummy)
+{
+	if (!pDummy)
+		return false;
+	int index = CPools::GetDummyPool()->GetJustIndex(pDummy);
+#ifdef FIX_BUGS
+	if (index < 0 || index >= CPools::GetDummyPool()->GetSize())
+#else
+	if (index < 0 || index > CPools::GetDummyPool()->GetSize())
+#endif
+		return false;
+	return pDummy->m_entryInfoList.first;
+}
diff --git a/src/entities/Dummy.h b/src/entities/Dummy.h
index 7998a748..84b1ce1a 100644
--- a/src/entities/Dummy.h
+++ b/src/entities/Dummy.h
@@ -15,3 +15,5 @@ public:
 	static void *operator new(size_t);
 	static void operator delete(void*, size_t);
 };
+
+bool IsDummyPointerValid(CDummy* pDummy);
diff --git a/src/entities/Entity.cpp b/src/entities/Entity.cpp
index b35ddb25..e83df204 100644
--- a/src/entities/Entity.cpp
+++ b/src/entities/Entity.cpp
@@ -28,6 +28,8 @@
 #include "Bones.h"
 #include "Debug.h"
 #include "Renderer.h"
+#include "Ped.h"
+#include "Dummy.h"
 
 int gBuildings;
 
@@ -1028,3 +1030,18 @@ CEntity::LoadEntityFlags(uint8*& buf)
 }
 
 #endif
+
+bool IsEntityPointerValid(CEntity* pEntity)
+{
+	if (!pEntity)
+		return false;
+	switch (pEntity->GetType()) {
+	case ENTITY_TYPE_NOTHING: return false;
+	case ENTITY_TYPE_BUILDING: return IsBuildingPointerValid((CBuilding*)pEntity);
+	case ENTITY_TYPE_VEHICLE: return IsVehiclePointerValid((CVehicle*)pEntity);
+	case ENTITY_TYPE_PED: return IsPedPointerValid((CPed*)pEntity);
+	case ENTITY_TYPE_OBJECT: return IsObjectPointerValid((CObject*)pEntity);
+	case ENTITY_TYPE_DUMMY: return IsDummyPointerValid((CDummy*)pEntity);
+	}
+	return false;
+}
diff --git a/src/entities/Entity.h b/src/entities/Entity.h
index fa57519e..dc5378a5 100644
--- a/src/entities/Entity.h
+++ b/src/entities/Entity.h
@@ -180,3 +180,5 @@ public:
 
 	static void AddSteamsFromGround(CPtrList& list);
 };
+
+bool IsEntityPointerValid(CEntity*);