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https://github.com/libretro/scummvm.git
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130 lines
3.3 KiB
C++
130 lines
3.3 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2002-2005 The ScummVM project
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header$
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*
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*/
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#ifndef SCUMM_UTIL_H
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#define SCUMM_UTIL_H
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#include "common/file.h"
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#include "common/stream.h"
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namespace Scumm {
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class BaseScummFile : public File {
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public:
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virtual void setEnc(byte value) = 0;
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virtual bool open(const char *filename, AccessMode mode = kFileReadMode) = 0;
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virtual bool openSubFile(const char *filename) = 0;
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virtual bool eof() = 0;
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virtual uint32 pos() = 0;
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virtual uint32 size() = 0;
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virtual void seek(int32 offs, int whence = SEEK_SET) = 0;
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virtual uint32 read(void *ptr, uint32 size) = 0;
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virtual uint32 write(const void *ptr, uint32 size) = 0;
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};
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class ScummFile : public BaseScummFile {
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private:
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byte _encbyte;
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uint32 _subFileStart;
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uint32 _subFileLen;
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public:
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ScummFile();
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void setEnc(byte value);
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void setSubfileRange(uint32 start, uint32 len);
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void resetSubfile();
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bool open(const char *filename, AccessMode mode = kFileReadMode);
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bool openSubFile(const char *filename);
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bool eof();
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uint32 pos();
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uint32 size();
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void seek(int32 offs, int whence = SEEK_SET);
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uint32 read(void *ptr, uint32 size);
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uint32 write(const void *ptr, uint32 size);
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};
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class ScummNESFile : public BaseScummFile {
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public:
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enum ROMset {
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kROMsetUSA,
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kROMsetEurope,
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kROMsetSweden,
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kROMsetFrance,
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kROMsetNum
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};
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struct Resource;
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private:
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Common::MemoryReadStream *_stream;
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ROMset _ROMset;
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byte *_buf;
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bool generateIndex();
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bool generateResource(int res);
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uint16 extractResource(Common::WriteStream *out, Resource *res);
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uint32 resOffset(Resource *res);
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uint16 resLength(Resource *res);
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byte fileReadByte();
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uint16 fileReadUint16LE();
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public:
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ScummNESFile();
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void setEnc(byte value);
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bool open(const char *filename, AccessMode mode = kFileReadMode);
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bool openSubFile(const char *filename);
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void close();
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bool eof() { return _stream->eos(); }
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uint32 pos() { return _stream->pos(); }
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uint32 size() { return _stream->size(); }
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void seek(int32 offs, int whence = SEEK_SET) { _stream->seek(offs, whence); }
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uint32 read(void *ptr, uint32 len) { return _stream->read(ptr, len); }
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uint32 write(const void *ptr, uint32 size);
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};
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// This is a constant lookup table of reverse bit masks
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extern const byte revBitMask[8];
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/* Direction conversion functions (between old dir and new dir format) */
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int newDirToOldDir(int dir);
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int oldDirToNewDir(int dir);
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int normalizeAngle(int angle);
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int fromSimpleDir(int dirtype, int dir);
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int toSimpleDir(int dirtype, int dir);
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void checkRange(int max, int min, int no, const char *str);
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const char *tag2str(uint32 tag);
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} // End of namespace Scumm
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#endif
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