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util.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/scumm/util.h,v 2.14.2.1 2005/10/18 02:11:25 sev Exp $
 *
 */

#ifndef SCUMM_UTIL_H
#define SCUMM_UTIL_H

#include "common/file.h"
#include "common/stream.h"

namespace Scumm {

#define revBitMask(x)   (0x80 >> (x))

class BaseScummFile : public Common::File {
public:
      virtual void setEnc(byte value) = 0;

      virtual bool open(const char *filename, AccessMode mode = kFileReadMode) = 0;
      virtual bool openSubFile(const char *filename) = 0;

      virtual bool eof() = 0;
      virtual uint32 pos() = 0;
      virtual uint32 size() = 0;
      virtual void seek(int32 offs, int whence = SEEK_SET) = 0;
      virtual uint32 read(void *dataPtr, uint32 dataSize) = 0;
      virtual uint32 write(const void *dataPtr, uint32 dataSize) = 0;
};

class ScummFile : public BaseScummFile {
private:
      byte _encbyte;
      uint32      _subFileStart;
      uint32      _subFileLen;
public:
      ScummFile();
      void setEnc(byte value);

      void setSubfileRange(uint32 start, uint32 len);
      void resetSubfile();

      bool open(const char *filename, AccessMode mode = kFileReadMode);
      bool openSubFile(const char *filename);

      bool eof();
      uint32 pos();
      uint32 size();
      void seek(int32 offs, int whence = SEEK_SET);
      uint32 read(void *dataPtr, uint32 dataSize);
      uint32 write(const void *dataPtr, uint32 dataSize);
};

class ScummNESFile : public BaseScummFile {
public:
      enum ROMset {
            kROMsetUSA,
            kROMsetEurope,
            kROMsetSweden,
            kROMsetFrance,
            kROMsetNum
      };

      struct Resource;

private:
      Common::MemoryReadStream *_stream;
      ROMset _ROMset;
      byte *_buf;

      bool generateIndex();
      bool generateResource(int res);
      uint16 extractResource(Common::WriteStream *out, Resource *res);

      uint32 resOffset(Resource *res);
      uint16 resLength(Resource *res);

      byte fileReadByte();
      uint16 fileReadUint16LE();

public:
      ScummNESFile();
      void setEnc(byte value);

      bool open(const char *filename, AccessMode mode = kFileReadMode);
      bool openSubFile(const char *filename);

      void close();
      bool eof() { return _stream->eos(); }
      uint32 pos() { return _stream->pos(); }
      uint32 size() { return _stream->size(); }
      void seek(int32 offs, int whence = SEEK_SET) { _stream->seek(offs, whence); }
      uint32 read(void *dataPtr, uint32 dataSize) { return _stream->read(dataPtr, dataSize); }
      uint32 write(const void *dataPtr, uint32 dataSize);
};


class ScummC64File : public BaseScummFile {
private:
      Common::MemoryReadStream *_stream;
      byte _roomDisks[59], _roomTracks[59], _roomSectors[59];

      byte *_buf;

      bool _maniac;
      Common::String _disk1, _disk2;
      int _openedDisk;

      int _numGlobalObjects;
      int _numRooms;
      int _numCostumes;
      int _numScripts;
      int _numSounds;
      const int *_resourcesPerFile;

      bool openDisk(char num);

      bool generateIndex();
      bool generateResource(int res);

      uint16 extractIndex(Common::WriteStream *out);
      uint16 extractResource(Common::WriteStream *out, int res);

      byte fileReadByte();
      uint16 fileReadUint16LE();

public:
      ScummC64File(char *disk1, char *disk2, bool maniac);
      void setEnc(byte value);

      bool open(const char *filename, AccessMode mode = kFileReadMode);
      bool openSubFile(const char *filename);

      void close();
      bool eof() { return _stream->eos(); }
      uint32 pos() { return _stream->pos(); }
      uint32 size() { return _stream->size(); }
      void seek(int32 offs, int whence = SEEK_SET) { _stream->seek(offs, whence); }
      uint32 read(void *dataPtr, uint32 dataSize) { return _stream->read(dataPtr, dataSize); }
      uint32 write(const void *dataPtr, uint32 dataSize);
};


/* Direction conversion functions (between old dir and new dir format) */
int newDirToOldDir(int dir);
int oldDirToNewDir(int dir);

int normalizeAngle(int angle);
int fromSimpleDir(int dirtype, int dir);
int toSimpleDir(int dirtype, int dir);

void checkRange(int max, int min, int no, const char *str);

const char *tag2str(uint32 tag);

} // End of namespace Scumm

#endif

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