mirror of
https://github.com/libretro/scummvm.git
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156 lines
4.1 KiB
C++
156 lines
4.1 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (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, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef SCUMM_FILE_H
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#define SCUMM_FILE_H
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#include "common/file.h"
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#include "common/stream.h"
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#include "scumm/detection.h"
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namespace Scumm {
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class ScummEngine;
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class BaseScummFile : public Common::SeekableReadStream {
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protected:
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byte _encbyte;
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Common::ScopedPtr<Common::SeekableReadStream> _baseStream;
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Common::String _debugName;
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public:
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BaseScummFile() : _encbyte(0) {}
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void setEnc(byte value) { _encbyte = value; }
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virtual bool open(const Common::Path &filename) = 0;
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virtual bool openSubFile(const Common::Path &filename) = 0;
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virtual void close();
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int64 pos() const override = 0;
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int64 size() const override = 0;
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bool seek(int64 offs, int whence = SEEK_SET) override = 0;
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Common::String getDebugName() const { return _debugName; }
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bool isOpen() const { return !!_baseStream; }
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// Unused
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#if 0
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virtual bool eos() const = 0;
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virtual uint32 read(void *dataPtr, uint32 dataSize) = 0;
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#endif
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};
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class ScummFile : public BaseScummFile {
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protected:
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int32 _subFileStart;
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int32 _subFileLen;
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bool _myEos; // Have we read past the end of the subfile?
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bool _isMac;
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void setSubfileRange(int32 start, int32 len);
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void resetSubfile();
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public:
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explicit ScummFile(const ScummEngine *vm);
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bool open(const Common::Path &filename) override;
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bool openSubFile(const Common::Path &filename) override;
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void clearErr() override { _myEos = false; BaseScummFile::clearErr(); }
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bool eos() const override;
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int64 pos() const override;
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int64 size() const override;
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bool seek(int64 offs, int whence = SEEK_SET) override;
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uint32 read(void *dataPtr, uint32 dataSize) override;
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};
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class ScummDiskImage : public BaseScummFile {
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private:
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Common::SeekableReadStream *_stream;
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byte _roomDisks[59], _roomTracks[59], _roomSectors[59];
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byte *_buf;
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const GameSettings _game;
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const Common::String _disk1, _disk2;
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int _openedDisk;
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int _numGlobalObjects;
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int _numRooms;
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int _numCostumes;
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int _numScripts;
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int _numSounds;
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const int *_resourcesPerFile;
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bool openDisk(char num);
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bool generateIndex();
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bool generateResource(int res);
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uint16 extractIndex(Common::WriteStream *out);
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uint16 extractResource(Common::WriteStream *out, int res);
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byte fileReadByte();
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uint16 fileReadUint16LE();
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public:
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ScummDiskImage(const char *disk1, const char *disk2, GameSettings game);
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bool open(const Common::Path &filename) override;
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bool openSubFile(const Common::Path &filename) override;
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void close() override;
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bool eos() const override { return _stream->eos(); }
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int64 pos() const override { return _stream->pos(); }
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int64 size() const override { return _stream->size(); }
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bool seek(int64 offs, int whence = SEEK_SET) override { return _stream->seek(offs, whence); }
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uint32 read(void *dataPtr, uint32 dataSize) override;
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};
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struct SteamIndexFile {
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byte id;
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Common::Platform platform;
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const char *pattern;
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const char *indexFileName;
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const char *executableName;
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int32 start;
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int32 len;
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};
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class ScummSteamFile : public ScummFile {
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private:
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const SteamIndexFile &_indexFile;
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bool openWithSubRange(const Common::Path &filename, int32 subFileStart, int32 subFileLen);
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public:
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ScummSteamFile(const ScummEngine *vm, const SteamIndexFile &indexFile) : ScummFile(vm), _indexFile(indexFile) {}
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bool open(const Common::Path &filename) override;
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};
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} // End of namespace Scumm
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#endif
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