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/* 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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef GLK_QUETZAL
#define GLK_QUETZAL
#include "common/array.h"
#include "common/endian.h"
#include "common/memstream.h"
#include "common/stream.h"
#include "engines/savestate.h"
#include "glk/blorb.h"
#include "glk/glk_types.h"
namespace Glk {
enum QueztalTag {
ID_IFSF = MKTAG('I', 'F', 'S', 'F'),
ID_IFZS = MKTAG('I', 'F', 'Z', 'S'),
ID_IFhd = MKTAG('I', 'F', 'h', 'd'),
ID_UMem = MKTAG('U', 'M', 'e', 'm'),
ID_CMem = MKTAG('C', 'M', 'e', 'm'),
ID_Stks = MKTAG('S', 't', 'k', 's'),
ID_SCVM = MKTAG('S', 'C', 'V', 'M')
};
class QuetzalBase {
public:
static uint32 getInterpreterTag(InterpreterType interpType);
};
/**
* Quetzal save file reader
*/
class QuetzalReader : public QuetzalBase {
struct Chunk {
uint32 _id;
size_t _offset, _size;
};
public:
/**
* Iterator for the chunks list
*/
struct Iterator {
private:
Common::SeekableReadStream *_stream;
Common::Array<Chunk> &_chunks;
int _index;
public:
/**
* Constructor
*/
Iterator(Common::SeekableReadStream *stream, Common::Array<Chunk> &chunks, int index) :
_stream(stream), _chunks(chunks), _index(index) {}
/**
* Deference
*/
Chunk &operator*() const { return _chunks[_index]; }
/**
* Incrementer
*/
Iterator &operator++() {
++_index;
return *this;
}
/**
* Decrementer
*/
Iterator &operator--() {
--_index;
return *this;
}
/**
* Equality test
*/
bool operator==(const Iterator &rhs) { return _index == rhs._index; }
/**
* Inequality test
*/
bool operator!=(const Iterator &rhs) { return _index != rhs._index; }
/**
* Get a read stream for the contents of a chunk
*/
Common::SeekableReadStream *getStream() {
_stream->seek(_chunks[_index]._offset);
return (_chunks[_index]._size == 0) ?
new Common::MemoryReadStream(nullptr, 0, DisposeAfterUse::YES) :
_stream->readStream(_chunks[_index]._size);
}
};
private:
Common::SeekableReadStream *_stream;
Common::Array<Chunk> _chunks;
public:
/**
* Constructor
*/
QuetzalReader() : _stream(nullptr) {}
/**
* Clear
*/
void clear();
/**
* Opens a Quetzal file for access
*/
bool open(Common::SeekableReadStream *stream, uint32 formType = 0);
/**
* Return an iterator for the beginning of the chunks list
*/
Iterator begin() { return Iterator(_stream, _chunks, 0); }
/**
* Return an iterator for the beginning of the chunks list
*/
Iterator end() { return Iterator(_stream, _chunks, _chunks.size()); }
/**
* Loads a Quetzal save and extracts it's description from an ANNO chunk
*/
static bool getSavegameDescription(Common::SeekableReadStream *rs, Common::String &saveName);
/**
* Loads a Quetzal save and extract's it's description and meta info
*/
static bool getSavegameMetaInfo(Common::SeekableReadStream *rs, SaveStateDescriptor &ssd);
/**
* Support method for reading a string from a stream
*/
static Common::String readString(Common::ReadStream *src);
};
/**
* Quetzal save file writer
*/
class QuetzalWriter : public QuetzalBase {
/**
* Chunk entry
*/
struct Chunk {
uint32 _id;
Common::MemoryWriteStreamDynamic _stream;
/**
* Constructor
*/
Chunk() : _id(0), _stream(DisposeAfterUse::YES) {}
/**
* Constructor
*/
Chunk(uint32 id) : _id(id), _stream(DisposeAfterUse::YES) {}
};
private:
Common::Array<Chunk> _chunks;
/**
* Add chunks common to all Glk savegames
*/
void addCommonChunks(const Common::String &saveName);
public:
/**
* Clear
*/
void clear() { _chunks.clear(); }
/**
* Add a chunk
*/
Common::WriteStream &add(uint32 chunkId);
/**
* Save the added chunks to file
*/
void save(Common::WriteStream *out, const Common::String &saveName, uint32 formType = ID_IFSF);
};
} // End of namespace Glk
#endif
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