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/* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#ifndef SCUMM_UTIL_H
#define SCUMM_UTIL_H
#include "common/file.h"
#include "common/stream.h"
namespace Scumm {
class BaseScummFile : public 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 *ptr, uint32 size) = 0;
virtual uint32 write(const void *ptr, uint32 size) = 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 *ptr, uint32 size);
uint32 write(const void *ptr, uint32 size);
};
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::MemoryWriteStream *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 *ptr, uint32 len) { return _stream->read(ptr, len); }
uint32 write(const void *ptr, uint32 size);
};
// This is a constant lookup table of reverse bit masks
extern const byte revBitMask[8];
/* 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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