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savefile.h

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2002-2005 The ScummVM project
 *
 * 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 2
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $Header: /cvsroot/scummvm/scummvm/common/savefile.h,v 1.22.2.1 2005/10/18 02:11:18 sev Exp $
 *
 */

#ifndef COMMON_SAVEFILE_H
#define COMMON_SAVEFILE_H

#include "common/stdafx.h"
#include "common/scummsys.h"
#include "common/stream.h"

namespace Common {

/**
 * A class which allows game engines to load game state data.
 * That typically means "save games", but also includes things like the
 * IQ points in Indy3.
 */
00036 class InSaveFile : public Common::ReadStream {
public:
      virtual ~InSaveFile() {}

      /**
       * Skip over the specified (positive) amount of bytes in the input stream.
       */
      virtual void skip(uint32 offset) = 0;
};

/**
 * A class which allows game engines to save game state data.
 * That typically means "save games", but also includes things like the
 * IQ points in Indy3.
 */
00051 class OutSaveFile : public Common::WriteStream {
public:
      virtual ~OutSaveFile() {}
};

/**
 * Convenience intermediate class, to be removed.
 */
00059 class SaveFile : public InSaveFile, public OutSaveFile {
public:
};

class SaveFileManager {

public:
      virtual ~SaveFileManager() {}

      /**
       * Open the file with name filename in the given directory for saving.
       * @param filename      the filename
       * @return pointer to a SaveFile object, or NULL if an error occured.
       */
      virtual OutSaveFile *openForSaving(const char *filename) = 0;

      /**
       * Open the file with name filename in the given directory for loading.
       * @param filename      the filename
       * @return pointer to a SaveFile object, or NULL if an error occured.
       */
      virtual InSaveFile *openForLoading(const char *filename) = 0;

      virtual void listSavefiles(const char * /* prefix */, bool *marks, int num) = 0;

      /** Get the path to the save game directory. */
      virtual const char *getSavePath() const;
};

class DefaultSaveFileManager : public SaveFileManager {
public:
      virtual OutSaveFile *openForSaving(const char *filename);
      virtual InSaveFile *openForLoading(const char *filename);
      virtual void listSavefiles(const char * /* prefix */, bool *marks, int num);

protected:
      SaveFile *makeSaveFile(const char *filename, bool saveOrLoad);
};

} // End of namespace Common

#endif

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