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ramsave.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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

#ifndef _RAMSAVE_H_
#define _RAMSAVE_H_

#include "common/system.h"
#include "common/savefile.h"

// SaveFileManager class

#define DS_MAX_SAVE_SIZE 150000

class DSSaveFile : public Common::InSaveFile, public Common::OutSaveFile {
      int address;
      int ptr;
      bool ownsData;
      bool saveCompressed;

      struct SCUMMSave {
            u32 magic;        // 4
            bool isValid;     // 5
            bool pad;         // 6
            char name[16];    // 22
            u32 size;         // 26
            u32 compressedSize; // 30
            u16 extraMagic;   // 32
            u32 reserved;     // 36
      } __attribute__ ((packed));

      SCUMMSave save;
      u8* saveData;
      SCUMMSave* origHeader;
      bool isOpenFlag;
      bool isTempFile;
      bool eosReached;

public:
      DSSaveFile();
      DSSaveFile(SCUMMSave* s, bool saveCompressed, u8* data);
      ~DSSaveFile();

      void reset();

      bool isOpen() const { return isOpenFlag; }
      virtual bool eos() const;
      virtual void clearErr();
      virtual bool skip(uint32 size);

      virtual int32 pos() const;
      virtual int32 size() const;
      virtual bool seek(int32 pos, int whence);

      uint32 read(void *buf, uint32 size);
      uint32 write(const void *buf, uint32 size);

      void setName(char *name);
      char* getName() { return save.name; }

      bool isValid() { return save.isValid; }
      bool isTemp() { return isTempFile; }
      bool matches(const char *prefix, int num);
      bool matches(const char *filename);

      void clearData();
      void compress();

      int getRamUsage() { return sizeof(save) + save.compressedSize; }
      char* getRamImage() { return (char *) &save; }

      int getSize() { return save.size; }

      DSSaveFile* clone();

      bool loadFromSaveRAM(vu8* address);
      int saveToSaveRAM(vu8* address);



      void deleteFile();

      void operator delete(void *p) {
//          consolePrintf("Finished! size=%d\n", ((DSSaveFile *) (p))->save->size);
      }



};



class DSSaveFileManager : public Common::SaveFileManager {

      DSSaveFile gbaSave[8];
      static DSSaveFileManager* instancePtr;
      int sramBytesFree;

public:
      DSSaveFileManager();
      ~DSSaveFileManager();

      static DSSaveFileManager* instance() { return instancePtr; }

      DSSaveFile *openSavefile(const char *filename, bool saveOrLoad);

      virtual Common::OutSaveFile* openForSaving(const char* filename) { return openSavefile(filename, true); }
      virtual Common::InSaveFile* openForLoading(const char* filename) { return openSavefile(filename, false); }

      virtual bool removeSavefile(const char *filename);
      virtual Common::StringList listSavefiles(const char *pattern);

      void flushToSaveRAM();

      void addBytesFree(int size) { sramBytesFree += size; }
      int getBytesFree() { return sramBytesFree; }

      void deleteFile(char* name);
      void listFiles();
      void formatSram();

      void loadAllFromSRAM();

      static bool isExtraDataPresent();
      static int getExtraData();
      static void setExtraData(int data);

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

#endif

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