Initial commit

engines/wintermute/system/sys_class.cpp

@@ -0,0 +1,215 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/*
+ * This file is based on WME Lite.
+ * http://dead-code.org/redir.php?target=wmelite
+ * Copyright (c) 2011 Jan Nedoma
+ */
+
+#include "engines/wintermute/persistent.h"
+#include "engines/wintermute/system/sys_instance.h"
+#include "engines/wintermute/system/sys_class.h"
+#include "engines/wintermute/system/sys_class_registry.h"
+#include "engines/wintermute/base/base_game.h"
+#include "engines/wintermute/base/base_persistence_manager.h"
+
+namespace Wintermute {
+
+//////////////////////////////////////////////////////////////////////////
+SystemClass::SystemClass(const AnsiString &name, PERSISTBUILD build, PERSISTLOAD load, bool persistentClass) {
+	_name = name;
+
+	_build = build;
+	_load = load;
+	_next = nullptr;
+	_savedId = -1;
+	_persistent = persistentClass;
+	_numInst = 0;
+
+	SystemClassRegistry::getInstance()->registerClass(this);
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+SystemClass::~SystemClass() {
+	SystemClassRegistry::getInstance()->unregisterClass(this);
+	removeAllInstances();
+}
+
+//////////////////////////////////////////////////////////////////////////
+bool SystemClass::removeAllInstances() {
+	Instances::iterator it;
+	for (it = _instances.begin(); it != _instances.end(); ++it) {
+		delete(it->_value);
+	}
+	_instances.clear();
+	_instanceMap.clear();
+
+	return true;
+}
+
+//////////////////////////////////////////////////////////////////////////
+SystemInstance *SystemClass::addInstance(void *instance, int id, int savedId) {
+	SystemInstance *inst = new SystemInstance(instance, id, this);
+	inst->setSavedId(savedId);
+	_instances[inst] = (inst);
+
+	_instanceMap[instance] = inst;
+
+	SystemClassRegistry::getInstance()->addInstanceToTable(inst, instance);
+
+	return inst;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+bool SystemClass::removeInstance(void *instance) {
+	InstanceMap::iterator mapIt = _instanceMap.find(instance);
+	if (mapIt == _instanceMap.end()) {
+		return false;
+	}
+
+	Instances::iterator it = _instances.find((mapIt->_value));
+	if (it != _instances.end()) {
+		delete(it->_value);
+		_instances.erase(it);
+	}
+
+	_instanceMap.erase(mapIt);
+
+	return false;
+}
+
+//////////////////////////////////////////////////////////////////////////
+int SystemClass::getInstanceId(void *pointer) {
+	InstanceMap::iterator mapIt = _instanceMap.find(pointer);
+	if (mapIt == _instanceMap.end()) {
+		return -1;
+	} else {
+		return (mapIt->_value)->getId();
+	}
+}
+
+//////////////////////////////////////////////////////////////////////////
+void *SystemClass::idToPointer(int savedID) {
+	//slow
+	Instances::iterator it;
+	for (it = _instances.begin(); it != _instances.end(); ++it) {
+		if ((it->_value)->getSavedId() == savedID) {
+			return (it->_value)->getInstance();
+		}
+	}
+	return nullptr;
+}
+
+//////////////////////////////////////////////////////////////////////////
+int SystemClass::getNumInstances() {
+	return _instances.size();
+}
+
+//////////////////////////////////////////////////////////////////////////
+void SystemClass::dump(Common::WriteStream *stream) {
+	Common::String str;
+	str = Common::String::format("%03d %c %-20s instances: %d\n", _id, _persistent ? 'p' : ' ', _name.c_str(), getNumInstances());
+	stream->write(str.c_str(), str.size());
+}
+
+//////////////////////////////////////////////////////////////////////////
+void SystemClass::saveTable(BaseGame *game, BasePersistenceManager *persistMgr) {
+	persistMgr->putString(_name.c_str());
+	persistMgr->putDWORD(_id);
+	persistMgr->putDWORD(_instances.size());
+
+	Instances::iterator it;
+	for (it = _instances.begin(); it != _instances.end(); ++it) {
+		persistMgr->putDWORD((it->_value)->getId());
+	}
+}
+
+//////////////////////////////////////////////////////////////////////////
+void SystemClass::loadTable(BaseGame *game, BasePersistenceManager *persistMgr) {
+	_savedId = persistMgr->getDWORD();
+	int numInstances = persistMgr->getDWORD();
+
+	for (int i = 0; i < numInstances; i++) {
+		int instId = persistMgr->getDWORD();
+		if (_persistent) {
+
+			if (i > 0) {
+				game->LOG(0, "Warning: attempting to load multiple instances of persistent class %s (%d)", _name.c_str(), numInstances);
+				continue;
+			}
+
+			Instances::iterator it = _instances.begin();
+			if (it != _instances.end()) {
+				(it->_value)->setSavedId(instId);
+				SystemClassRegistry::getInstance()->addInstanceToTable((it->_value), (it->_value)->getInstance());
+			} else {
+				game->LOG(0, "Warning: instance %d of persistent class %s not found", i, _name.c_str());
+			}
+		}
+		// normal instances, create empty objects
+		else {
+			void *emptyObject = _build();
+			addInstance(emptyObject, SystemClassRegistry::getInstance()->getNextId(), instId);
+		}
+
+	}
+}
+
+//////////////////////////////////////////////////////////////////////////
+void SystemClass::saveInstances(BaseGame *game, BasePersistenceManager *persistMgr) {
+	Instances::iterator it;
+	for (it = _instances.begin(); it != _instances.end(); ++it) {
+		// write instace header
+		persistMgr->putString("<INSTANCE_HEAD>");
+		persistMgr->putDWORD(_id);
+		persistMgr->putDWORD((it->_value)->getId());
+		persistMgr->putString("</INSTANCE_HEAD>");
+		_load((it->_value)->getInstance(), persistMgr);
+		persistMgr->putString("</INSTANCE>");
+	}
+}
+
+//////////////////////////////////////////////////////////////////////////
+void SystemClass::loadInstance(void *instance, BasePersistenceManager *persistMgr) {
+	_load(instance, persistMgr);
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+void SystemClass::resetSavedIDs() {
+	Instances::iterator it;
+	for (it = _instances.begin(); it != _instances.end(); ++it) {
+		(it->_value)->setSavedId(-1);
+	}
+}
+
+//////////////////////////////////////////////////////////////////////////
+void SystemClass::instanceCallback(SYS_INSTANCE_CALLBACK lpCallback, void *lpData) {
+	Instances::iterator it;
+	for (it = _instances.begin(); it != _instances.end(); ++it) {
+		lpCallback((it->_value)->getInstance(), lpData);
+	}
+}
+
+} // End of namespace Wintermute

engines/wintermute/system/sys_class.h

@@ -0,0 +1,129 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/*
+ * This file is based on WME Lite.
+ * http://dead-code.org/redir.php?target=wmelite
+ * Copyright (c) 2011 Jan Nedoma
+ */
+
+#ifndef WINTERMUTE_SYSCLASS_H
+#define WINTERMUTE_SYSCLASS_H
+
+#include "engines/wintermute/persistent.h"
+#include "engines/wintermute/dctypes.h"
+#include "common/hashmap.h"
+#include "common/func.h"
+#include "common/stream.h"
+
+namespace Wintermute {
+class SystemInstance;
+class BaseGame;
+class BasePersistenceManager;
+class SystemClass;
+
+}
+
+namespace Common {
+template<typename T> struct Hash;
+
+template<> struct Hash<void *> : public UnaryFunction<void *, uint> {
+	uint operator()(void *val) const {
+		return (uint)((size_t)val);
+	}
+};
+
+template<> struct Hash<Wintermute::SystemInstance *> : public UnaryFunction<Wintermute::SystemInstance *, uint> {
+	uint operator()(Wintermute::SystemInstance *val) const {
+		return (uint)((size_t)val);
+	}
+};
+
+
+}
+
+namespace Wintermute {
+
+class SystemClass {
+public:
+	SystemClass(const AnsiString &name, PERSISTBUILD build, PERSISTLOAD load, bool persistentClass);
+	~SystemClass();
+
+	int getNumInstances();
+	bool removeInstance(void *instance);
+	SystemInstance *addInstance(void *instance, int id, int savedId = -1);
+	bool removeAllInstances();
+
+	int getInstanceId(void *pointer);
+	void *idToPointer(int savedId);
+
+	void setId(int id) {
+		_id = id;
+	}
+	int getId() const {
+		return _id;
+	}
+
+	int getSavedId() const {
+		return _savedId;
+	}
+
+	bool isPersistent() const {
+		return _persistent;
+	}
+
+	AnsiString getName() const {
+		return _name;
+	}
+
+	void saveTable(BaseGame *game, BasePersistenceManager *persistMgr);
+	void loadTable(BaseGame *game, BasePersistenceManager *persistMgr);
+
+	void saveInstances(BaseGame *game, BasePersistenceManager *persistMgr);
+	void loadInstance(void *instance, BasePersistenceManager *persistMgr);
+
+	void instanceCallback(SYS_INSTANCE_CALLBACK lpCallback, void *lpData);
+
+	void resetSavedIDs();
+
+	void dump(Common::WriteStream *stream);
+
+private:
+	int _numInst;
+	bool _persistent;
+	SystemClass *_next;
+	int _id{};
+	int _savedId;
+	AnsiString _name;
+	PERSISTBUILD _build;
+	PERSISTLOAD _load;
+
+	//typedef std::set<SystemInstance *> Instances;
+	typedef Common::HashMap<SystemInstance *, SystemInstance *> Instances;
+	Instances _instances;
+
+	typedef Common::HashMap<void *, SystemInstance *> InstanceMap;
+	InstanceMap _instanceMap;
+};
+
+} // End of namespace Wintermute
+
+#endif

engines/wintermute/system/sys_class_registry.cpp

@@ -0,0 +1,344 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/*
+ * This file is based on WME Lite.
+ * http://dead-code.org/redir.php?target=wmelite
+ * Copyright (c) 2011 Jan Nedoma
+ */
+
+#include "engines/wintermute/base/base_game.h"
+#include "engines/wintermute/platform_osystem.h"
+#include "engines/wintermute/base/base_engine.h"
+#include "engines/wintermute/base/gfx/base_renderer.h"
+#include "engines/wintermute/system/sys_instance.h"
+#include "engines/wintermute/system/sys_class_registry.h"
+#include "engines/wintermute/system/sys_class.h"
+#include "engines/wintermute/wintermute.h"
+#include "common/stream.h"
+
+namespace Wintermute {
+
+//////////////////////////////////////////////////////////////////////////
+SystemClassRegistry::SystemClassRegistry() {
+	_count = 0;
+	_disabled = false;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+SystemClassRegistry::~SystemClassRegistry() {
+	unregisterClasses();
+}
+
+//////////////////////////////////////////////////////////////////////////
+SystemClassRegistry *SystemClassRegistry::getInstance() {
+	return BaseEngine::instance().getClassRegistry();
+}
+
+void SystemClassRegistry::unregisterClasses() {
+	// SystemClass calls UnregisterClass upon destruction.
+	while (_classes.size() > 0) {
+		delete _classes.begin()->_value;
+	}
+}
+
+//////////////////////////////////////////////////////////////////////////
+bool SystemClassRegistry::registerClass(SystemClass *classObj) {
+	classObj->setId(_count++);
+	//_classes.insert(classObj);
+	_classes[classObj] = classObj;
+
+	_nameMap[classObj->getName()] = classObj;
+	_idMap[classObj->getId()] = classObj;
+
+	return true;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+bool SystemClassRegistry::unregisterClass(SystemClass *classObj) {
+
+	Classes::iterator it = _classes.find(classObj);
+	if (it == _classes.end()) {
+		return false;
+	}
+
+	if (classObj->getNumInstances() != 0) {
+		debugC(Wintermute::kWintermuteDebugSaveGame, "Memory leak@class %-20s: %d instance(s) left\n", classObj->getName().c_str(), classObj->getNumInstances());
+	}
+	_classes.erase(it);
+
+	NameMap::iterator mapIt = _nameMap.find(classObj->getName());
+	if (mapIt != _nameMap.end()) {
+		_nameMap.erase(mapIt);
+	}
+
+	IdMap::iterator idIt = _idMap.find(classObj->getId());
+	if (idIt != _idMap.end()) {
+		_idMap.erase(idIt);
+	}
+
+
+	return true;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+bool SystemClassRegistry::registerInstance(const char *className, void *instance) {
+	if (_disabled) {
+		return true;
+	}
+
+	NameMap::iterator mapIt = _nameMap.find(className);
+	if (mapIt == _nameMap.end()) {
+		return false;
+	}
+
+	SystemInstance *inst = (*mapIt)._value->addInstance(instance, _count++);
+	return (inst != nullptr);
+}
+
+//////////////////////////////////////////////////////////////////////////
+void SystemClassRegistry::addInstanceToTable(SystemInstance *instance, void *pointer) {
+	_instanceMap[pointer] = instance;
+
+	if (instance->getSavedId() >= 0) {
+		_savedInstanceMap[instance->getSavedId()] = instance;
+	}
+}
+
+//////////////////////////////////////////////////////////////////////////
+int SystemClassRegistry::getNextId() {
+	return _count++;
+}
+
+//////////////////////////////////////////////////////////////////////////
+bool SystemClassRegistry::unregisterInstance(const char *className, void *instance) {
+	NameMap::iterator mapIt = _nameMap.find(className);
+	if (mapIt == _nameMap.end()) {
+		return false;
+	}
+	(*mapIt)._value->removeInstance(instance);
+
+	InstanceMap::iterator instIt = _instanceMap.find(instance);
+	if (instIt != _instanceMap.end()) {
+		_instanceMap.erase(instIt);
+		return true;
+	} else {
+		return false;
+	}
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+bool SystemClassRegistry::getPointerID(void *pointer, int *classID, int *instanceID) {
+	if (pointer == nullptr) {
+		return true;
+	}
+
+	InstanceMap::iterator it = _instanceMap.find(pointer);
+	if (it == _instanceMap.end()) {
+		return false;
+	}
+
+
+	SystemInstance *inst = (*it)._value;
+	*instanceID = inst->getId();
+	*classID = inst->getClass()->getId();
+
+	return true;
+}
+
+//////////////////////////////////////////////////////////////////////////
+void *SystemClassRegistry::idToPointer(int classID, int instanceID) {
+	SavedInstanceMap::iterator it = _savedInstanceMap.find(instanceID);
+	if (it == _savedInstanceMap.end()) {
+		return nullptr;
+	} else {
+		return (*it)._value->getInstance();
+	}
+}
+
+bool checkHeader(const char *tag, BasePersistenceManager *pm) {
+	char *test = pm->getString();
+	Common::String verify = test;
+	delete[] test;
+	bool retVal = (verify == tag);
+	if (!retVal) {
+		error("Expected %s in Save-file not found", tag);
+	}
+	return retVal;
+}
+
+//////////////////////////////////////////////////////////////////////////
+bool SystemClassRegistry::saveTable(BaseGame *game, BasePersistenceManager *persistMgr, bool quickSave) {
+	persistMgr->putString("<CLASS_REGISTRY_TABLE>");
+	persistMgr->putDWORD(_classes.size());
+
+	int counter = 0;
+
+	Classes::iterator it;
+	for (it = _classes.begin(); it != _classes.end(); ++it) {
+		counter++;
+
+		if (!quickSave) {
+			game->setIndicatorVal((int)(50.0f / (float)((float)_classes.size() / (float)counter)));
+		}
+
+		(it->_value)->saveTable(game, persistMgr);
+	}
+	persistMgr->putString("</CLASS_REGISTRY_TABLE>");
+	return STATUS_OK;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+bool SystemClassRegistry::loadTable(BaseGame *game, BasePersistenceManager *persistMgr) {
+	checkHeader("<CLASS_REGISTRY_TABLE>", persistMgr);
+
+	// reset SavedID of current instances
+	Classes::iterator it;
+	for (it = _classes.begin(); it != _classes.end(); ++it) {
+		(it->_value)->resetSavedIDs();
+	}
+
+	for (it = _classes.begin(); it != _classes.end(); ++it) {
+		if ((it->_value)->isPersistent()) {
+			continue;
+		}
+		(it->_value)->removeAllInstances();
+	}
+
+	_instanceMap.clear();
+
+	uint32 numClasses = persistMgr->getDWORD();
+
+	for (uint32 i = 0; i < numClasses; i++) {
+		game->setIndicatorVal((int)(50.0f / (float)((float)numClasses / (float)(i + 1))));
+
+		Common::String className = persistMgr->getStringObj();
+
+		// WA to be removed later
+		// This allow load save games where SXVlink class reference is stored
+		if (className == "SXVlink" && !game->_targetName.contains("sunrise")) {
+			persistMgr->getDWORD(); // saveId
+			persistMgr->getDWORD(); // numInstances
+			continue;
+		}
+
+		NameMap::iterator mapIt = _nameMap.find(className);
+		if (mapIt != _nameMap.end()) {
+			(*mapIt)._value->loadTable(game,  persistMgr);
+		}
+	}
+
+	checkHeader("</CLASS_REGISTRY_TABLE>", persistMgr);
+
+	return STATUS_OK;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+bool SystemClassRegistry::saveInstances(BaseGame *game, BasePersistenceManager *persistMgr, bool quickSave) {
+
+	Classes::iterator it;
+
+	// count total instances
+	int numInstances = 0;
+	for (it = _classes.begin(); it != _classes.end(); ++it) {
+		numInstances += (it->_value)->getNumInstances();
+	}
+
+	persistMgr->putDWORD(numInstances);
+
+	int counter = 0;
+	for (it = _classes.begin(); it != _classes.end(); ++it) {
+		counter++;
+
+		if (!quickSave) {
+			if (counter % 20 == 0) {
+				game->setIndicatorVal((int)(50.0f + 50.0f / (float)((float)_classes.size() / (float)counter)));
+			}
+		}
+		game->miniUpdate();
+
+		(it->_value)->saveInstances(game,  persistMgr);
+	}
+
+	return STATUS_OK;
+}
+
+//////////////////////////////////////////////////////////////////////////
+bool SystemClassRegistry::loadInstances(BaseGame *game, BasePersistenceManager *persistMgr) {
+	// get total instances
+	int numInstances = persistMgr->getDWORD();
+
+	for (int i = 0; i < numInstances; i++) {
+		if (i % 20 == 0) {
+			game->setIndicatorVal((int)(50.0f + 50.0f / (float)((float)numInstances / (float)(i + 1))));
+		}
+
+		checkHeader("<INSTANCE_HEAD>", persistMgr);
+
+		int classID = persistMgr->getDWORD();
+		int instanceID = persistMgr->getDWORD();
+		void *instance = idToPointer(classID, instanceID);
+
+		checkHeader("</INSTANCE_HEAD>", persistMgr);
+
+		Classes::iterator it;
+		for (it = _classes.begin(); it != _classes.end(); ++it) {
+			if ((it->_value)->getSavedId() == classID) {
+				(it->_value)->loadInstance(instance, persistMgr);
+				break;
+			}
+		}
+		checkHeader("</INSTANCE>", persistMgr);
+	}
+
+	_savedInstanceMap.clear();
+
+	return STATUS_OK;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+bool SystemClassRegistry::enumInstances(SYS_INSTANCE_CALLBACK lpCallback, const char *className, void *lpData) {
+	NameMap::iterator mapIt = _nameMap.find(className);
+	if (mapIt == _nameMap.end()) {
+		return STATUS_FAILED;
+	}
+
+	(*mapIt)._value->instanceCallback(lpCallback, lpData);
+	return STATUS_OK;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+void SystemClassRegistry::dumpClasses(Common::WriteStream *stream) {
+	Classes::iterator it;
+	for (it = _classes.begin(); it != _classes.end(); ++it) {
+		(it->_value)->dump(stream);
+	}
+}
+
+} // End of namespace Wintermute

engines/wintermute/system/sys_class_registry.h

@@ -0,0 +1,108 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/*
+ * This file is based on WME Lite.
+ * http://dead-code.org/redir.php?target=wmelite
+ * Copyright (c) 2011 Jan Nedoma
+ */
+
+#ifndef WINTERMUTE_SYSCLASSREGISTRY_H
+#define WINTERMUTE_SYSCLASSREGISTRY_H
+
+#include "engines/wintermute/wintypes.h"
+#include "engines/wintermute/dctypes.h"
+#include "engines/wintermute/system/sys_class.h"
+#include "common/hashmap.h"
+#include "common/hash-str.h"
+#include "common/func.h"
+#include "common/stream.h"
+
+namespace Wintermute {
+class SystemClass;
+}
+
+namespace Common {
+template<typename T> struct Hash;
+template<> struct Hash<Wintermute::SystemClass *> : public UnaryFunction<Wintermute::SystemClass *, uint> {
+	uint operator()(Wintermute::SystemClass *val) const {
+		return (uint)((size_t)val);
+	}
+};
+
+}
+
+namespace Wintermute {
+
+class BaseGame;
+class BasePersistenceManager;
+class SystemInstance;
+
+class SystemClassRegistry {
+	void unregisterClasses();
+public:
+	void registerClasses(); // persistent.cpp
+#ifdef ENABLE_WME3D
+	void register3DClasses(); // persistent.cpp
+#endif
+	static SystemClassRegistry *getInstance();
+
+	bool enumInstances(SYS_INSTANCE_CALLBACK lpCallback, const char *className, void *lpData);
+	bool loadTable(BaseGame *game, BasePersistenceManager *persistMgr);
+	bool saveTable(BaseGame *game, BasePersistenceManager *persistMgr, bool quickSave);
+	bool loadInstances(BaseGame *game, BasePersistenceManager *persistMgr);
+	bool saveInstances(BaseGame *game, BasePersistenceManager *persistMgr, bool quickSave);
+	void *idToPointer(int classID, int instanceId);
+	bool getPointerID(void *pointer, int *classId, int *instanceId);
+	bool registerClass(SystemClass *classObj);
+	bool unregisterClass(SystemClass *classObj);
+	bool registerInstance(const char *className, void *instance);
+	bool unregisterInstance(const char *className, void *instance);
+	void dumpClasses(Common::WriteStream *stream);
+	int getNextId();
+	void addInstanceToTable(SystemInstance *instance, void *pointer);
+
+	SystemClassRegistry();
+	virtual ~SystemClassRegistry();
+
+	bool _disabled;
+	int _count;
+
+	typedef Common::HashMap<SystemClass *, SystemClass *> Classes;
+	Classes _classes;
+
+	typedef Common::HashMap<AnsiString, SystemClass *> NameMap;
+	NameMap _nameMap;
+
+	typedef Common::HashMap<int, SystemClass *> IdMap;
+	IdMap _idMap;
+
+	typedef Common::HashMap<void *, SystemInstance *> InstanceMap;
+	InstanceMap _instanceMap;
+
+	typedef Common::HashMap<int, SystemInstance *> SavedInstanceMap;
+	SavedInstanceMap _savedInstanceMap;
+
+};
+
+} // End of namespace Wintermute
+
+#endif

engines/wintermute/system/sys_instance.cpp

@@ -0,0 +1,48 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/*
+ * This file is based on WME Lite.
+ * http://dead-code.org/redir.php?target=wmelite
+ * Copyright (c) 2011 Jan Nedoma
+ */
+
+#include "engines/wintermute/system/sys_instance.h"
+#include "engines/wintermute/system/sys_class_registry.h"
+#include "engines/wintermute/system/sys_class.h"
+
+namespace Wintermute {
+
+//////////////////////////////////////////////////////////////////////////
+SystemInstance::SystemInstance(void *instance, int id, SystemClass *sysClass) {
+	_instance = instance;
+	_id = id;
+	_savedId = -1;
+	_class = sysClass;
+
+	_used = false;
+}
+
+//////////////////////////////////////////////////////////////////////////
+SystemInstance::~SystemInstance() {
+}
+
+} // End of namespace Wintermute

engines/wintermute/system/sys_instance.h

@@ -0,0 +1,67 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/*
+ * This file is based on WME Lite.
+ * http://dead-code.org/redir.php?target=wmelite
+ * Copyright (c) 2011 Jan Nedoma
+ */
+
+#ifndef WINTERMUTE_SYSINSTANCE_H
+#define WINTERMUTE_SYSINSTANCE_H
+
+namespace Wintermute {
+
+class SystemClass;
+
+class SystemInstance {
+public:
+	SystemInstance(void *instance, int id, SystemClass *sysClass);
+	virtual ~SystemInstance();
+
+	int getId() const {
+		return _id;
+	}
+	int getSavedId() const {
+		return _savedId;
+	}
+	void *getInstance() const {
+		return _instance;
+	}
+	SystemClass *getClass() const {
+		return _class;
+	}
+
+	void setSavedId(int id) {
+		_savedId = id;
+	}
+
+private:
+	bool _used;
+	int _id;
+	int _savedId;
+	void *_instance;
+	SystemClass *_class;
+};
+
+} // End of namespace Wintermute
+
+#endif