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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 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.
*
*/
#ifndef GARGOYLE_STREAMS_H
#define GARGOYLE_STREAMS_H
#include "common/scummsys.h"
#include "gargoyle/glk_types.h"
namespace Gargoyle {
class GargoyleEngine;
class Window;
class Streams;
struct StreamResult {
uint32 _readCount;
uint32 _writeCount;
};
/**
* Base class for streams
*/
class Stream {
public:
Streams *_streams;
Stream *_prev;
Stream *_next;
uint32 _rock;
bool _unicode;
uint32 _readCount;
uint32 _writeCount;
bool _readable, _writable;
public:
/**
* Constructor
*/
Stream(Streams *streams, bool readable, bool writable, uint32 rock, bool unicode);
/**
* Destructor
*/
virtual ~Stream();
/**
* Get the next stream
*/
Stream *getNext(uint32 *rock) const;
/**
* Get the rock value for the stream
*/
uint32 getRock() const { return _rock; }
/**
* Fill out the total amount read and/or written
*/
void fillResult(StreamResult *result);
/**
* Close and delete the stream
*/
void close(StreamResult *result = nullptr);
/**
* Write a character
*/
virtual void writeChar(unsigned char ch) = 0;
/**
* Write a unicode character
*/
virtual void writeCharUni(uint32 ch) = 0;
};
typedef Stream *strid_t;
/**
* Implements the stream for writing text to a window
*/
class WindowStream : public Stream {
private:
Window *_window;
public:
/**
* Constructor
*/
WindowStream(Streams *streams, Window *window, uint32 rock = 0, bool unicode = true) :
Stream(streams, true, false, rock, unicode), _window(window) {}
/**
* Close the stream
*/
virtual void close(StreamResult *result = nullptr);
/**
* Write a character
*/
virtual void writeChar(unsigned char ch) override;
/**
* Write a unicode character
*/
virtual void writeCharUni(uint32 ch) override;
};
/**
* Implements an in-memory stream
*/
class MemoryStream : public Stream {
private:
void *_buf; ///< unsigned char* for latin1, glui32* for unicode
void *_bufptr;
void *_bufend;
void *_bufeof;
size_t _buflen; ///< # of bytes for latin1, # of 4-byte words for unicode
public:
/**
* Constructor
*/
MemoryStream(Streams *streams, void *buf, size_t buflen, FileMode mode, uint32 rock = 0, bool unicode = true);
/**
* Write a character
*/
virtual void writeChar(unsigned char ch);
/**
* Write a unicode character
*/
virtual void writeCharUni(uint32 ch);
};
/**
* Streams manager
*/
class Streams {
friend class Stream;
private:
GargoyleEngine *_engine;
Stream *_streamList;
Stream *_currentStream;
private:
/**
* Adds a created stream to the list
*/
void addStream(Stream *stream);
/**
* Remove a stream
*/
void removeStream(Stream *stream);
public:
/**
* Constructor
*/
Streams(GargoyleEngine *engine);
/**
* Destructor
*/
~Streams();
/**
* Add a window stream
*/
WindowStream *addWindowStream(Window *window);
/**
* Add a memory stream
*/
MemoryStream *addMemoryStream(void *buf, size_t buflen, FileMode mode, uint32 rock = 0, bool unicode = true);
/**
* Delete a stream
*/
void deleteStream(Stream *stream) {
delete stream;
}
/**
* Start an Iteration through streams
*/
Stream *getFirst(uint32 *rock);
/**
* Set the current output stream
*/
void setCurrent(Stream *stream) {
assert(stream->_writable);
_currentStream = stream;
}
/**
* Gets the current output stream
*/
Stream *getCurrent() const { return _currentStream; }
};
} // End of namespace Gargoyle
#endif
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