Assign sequential object IDs at Max export time

Sources/Plasma/PubUtilLib/plResMgr/plRegistryKeyList.cpp

@@ -201,6 +201,16 @@ bool plRegistryKeyList::SetKeyUnused(plKeyImp* key, LoadStatus& loadStatusChange
     return foundKey != nullptr;
 }
 
+void plRegistryKeyList::PrepForWrite()
+{
+    uint32_t objectID = 1;
+    for (plKeyImp* key : fKeys) {
+        if (key->ObjectIsLoaded()) {
+            key->SetObjectID(objectID++);
+        }
+    }
+}
+
 void plRegistryKeyList::Read(hsStream* s)
 {
     uint32_t keyListLen = s->ReadLE32();

Sources/Plasma/PubUtilLib/plResMgr/plRegistryKeyList.h

@@ -97,6 +97,10 @@ class plRegistryKeyList
     void SetKeyUsed(plKeyImp* key) { ++fReffedKeys; }
     bool SetKeyUnused(plKeyImp* key, LoadStatus& loadStatusChange);
 
+    // Export time only.  Before we write to disk, assign all the loaded keys
+    // sequential object IDs that they can use to do fast lookups at load time.
+    void PrepForWrite();
+
     void Read(hsStream* s);
     void Write(hsStream* s);
 };

Sources/Plasma/PubUtilLib/plResMgr/plRegistryNode.cpp

@@ -204,6 +204,15 @@ void plRegistryPageNode::UnloadKeys()
     fLoadedTypes = 0;
 }
 
+void plRegistryPageNode::PrepForWrite()
+{
+    if (!fIsNewPage)
+        return;
+
+    for (auto [idx, keyList] : fKeyLists)
+        keyList->PrepForWrite();
+}
+
 //// plWriteIterator /////////////////////////////////////////////////////////
 //  Key iterator for writing objects
 class plWriteIterator : public plRegistryKeyIterator

Sources/Plasma/PubUtilLib/plResMgr/plRegistryNode.h

@@ -139,6 +139,10 @@ class plRegistryPageNode
     hsStream*   OpenStream();
     void        CloseStream();
 
+    // Export time only.  Before we write to disk, assign all the loaded keys
+    // sequential object IDs that they can use to do fast lookups at load time.
+    void PrepForWrite();
+
     // Takes care of everything involved in writing this page to disk
     void Write();
     void DeleteSource();

Sources/Tools/MaxMain/plPluginResManager.cpp

@@ -373,6 +373,18 @@ plLocation plPluginResManager::ICreateLocation(const ST::string& age, const ST::
     return newLoc;
 }
 
+class plObjectIDSortingPageIterator : public plRegistryPageIterator
+{
+public:
+    plObjectIDSortingPageIterator() {}
+    bool EatPage(plRegistryPageNode *page) override
+    {
+        if (page->GetPageInfo().GetLocation() != plLocation::kGlobalFixedLoc)
+            page->PrepForWrite();
+        return true;
+    }
+};
+
 class plWritePageIterator : public plRegistryPageIterator
 {
 public:
@@ -387,6 +399,9 @@ class plWritePageIterator : public plRegistryPageIterator
 
 void plPluginResManager::WriteAllPages()
 {
+    plObjectIDSortingPageIterator idSort;
+    IteratePages(&idSort);
+
     plWritePageIterator iter;
     IteratePages(&iter);
 }