Function PushMap

Plugins/UnLua/Source/UnLua/Private/UnLuaBase.cpp:437–470

* Push an untyped map (same memory layout with TMap). see PushArray */

     * Push an untyped map (same memory layout with TMap). see PushArray
     */
    int32 PushMap(lua_State *L, const FScriptMap *ScriptMap, TSharedPtr<ITypeInterface> KeyInterface, TSharedPtr<ITypeInterface> ValueInterface, bool bCreateCopy)
    {
        if (!L || !ScriptMap || !KeyInterface || !ValueInterface)
        {
            return 0;
        }

        const auto Registry = FLuaEnv::FindEnvChecked(L).GetContainerRegistry();
        if (bCreateCopy)
        {
            int32 Num = ScriptMap->Num();
            FLuaMap SrcMap(ScriptMap, KeyInterface, ValueInterface, FLuaMap::OwnedByOther);
            FLuaMap *DestMap = Registry->NewMap(L, KeyInterface, ValueInterface, FLuaMap::OwnedBySelf);
            DestMap->Clear(Num);
            for (int32 SrcIndex = 0; Num; ++SrcIndex)
            {
                if (ScriptMap->IsValidIndex(SrcIndex))
                {
                    int32 DestIndex = DestMap->AddDefaultValue_Invalid_NeedsRehash();
                    uint8 *SrcData = SrcMap.GetData(SrcIndex);
                    uint8 *DestData = DestMap->GetData(DestIndex);
                    KeyInterface->Copy(DestData, SrcData);
                    ValueInterface->Copy(DestData + DestMap->MapLayout.ValueOffset, SrcData + SrcMap.MapLayout.ValueOffset);
                    --Num;
                }
            }
            DestMap->Rehash();
        }
        else
        {
            Registry->FindOrAdd(L, (FScriptMap*)ScriptMap, KeyInterface, ValueInterface);
        }
        return 1;
    }

    /**
     * Get an untyped dynamic array at the given stack index