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pakfs_save_manager.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 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.
 *
 * $URL: https://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-1-2-0/backends/platform/n64/pakfs_save_manager.h $
 * $Id: pakfs_save_manager.h 48286 2010-03-18 15:44:59Z fingolfin $
 *
 */

#ifndef __PAKFS_SAVE_MANAGER__
#define __PAKFS_SAVE_MANAGER__

#include <common/savefile.h>
#include <common/zlib.h>

#include <pakfs.h> // N64 PakFS library

bool pakfs_deleteSaveGame(const char *filename);

class InPAKSave : public Common::InSaveFile {
private:
      PAKFILE *fd;

      uint32 read(void *buf, uint32 cnt);
      bool skip(uint32 offset);
      bool seek(int32 offs, int whence);

public:
      InPAKSave() : fd(NULL) { }

      ~InPAKSave() {
            if (fd != NULL)
                  pakfs_close(fd);
      }

      bool eos() const {
            return pakfs_eof(fd);
      }
      void clearErr() {
            pakfs_clearerr(fd);
      }
      int32 pos() const {
            return pakfs_tell(fd);
      }
      int32 size() const {
            return fd->size;
      }

      bool readSaveGame(const char *filename) {
            fd = pakfs_open(filename, "r");
            return (fd != NULL);
      }
};

class OutPAKSave : public Common::OutSaveFile {
private:
      PAKFILE *fd;

public:
      uint32 write(const void *buf, uint32 cnt);

      OutPAKSave(const char *_filename) : fd(NULL) {
            fd = pakfs_open(_filename, "w");
      }

      ~OutPAKSave() {
            if (fd != NULL) {
                  finalize();
                  pakfs_close(fd);
                  flushCurrentPakData();
            }
      }

      bool err() const {
            if (fd)
                  return (pakfs_error(fd) == 1);
            else
                  return true;
      }
      void clearErr() {
            pakfs_clearerr(fd);
      }
      void finalize() {
            pakfs_flush(fd);
      }
};

class PAKSaveManager : public Common::SaveFileManager {
public:

      virtual Common::OutSaveFile *openForSaving(const Common::String &filename) {
            OutPAKSave *s = new OutPAKSave(filename.c_str());
            if (!s->err()) {
                  return Common::wrapCompressedWriteStream(s);
            } else {
                  delete s;
                  return NULL;
            }
      }

      virtual Common::InSaveFile *openForLoading(const Common::String &filename) {
            InPAKSave *s = new InPAKSave();
            if (s->readSaveGame(filename.c_str())) {
                  return Common::wrapCompressedReadStream(s);
            } else {
                  delete s;
                  return NULL;
            }
      }

      virtual bool removeSavefile(const Common::String &filename) {
            return ::pakfs_deleteSaveGame(filename.c_str());
      }

      virtual Common::StringArray listSavefiles(const Common::String &pattern);
};


#endif


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