sys_class.h

/* 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