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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 GLK_ALAN2
#define GLK_ALAN2
#include "common/scummsys.h"
#include "common/stack.h"
#include "glk/glk_api.h"
#include "glk/alan2/acode.h"
#include "glk/alan2/types.h"
namespace Glk {
namespace Alan2 {
typedef Common::FixedStack<Aptr, 100> Alan2Stack;
class Decode;
class Execute;
class Interpreter;
class SaveLoad;
#define N_EVTS 100
/**
* Alan2 game interpreter
*/
class Alan2 : public GlkAPI {
public:
Common::SeekableReadStream *_gameFile;
bool vm_exited_cleanly;
private:
/**
* Validates the game file, and if it's invalid, displays an error dialog
*/
bool is_gamefile_valid();
public:
/**
* Constructor
*/
Alan2(OSystem *syst, const GlkGameDescription &gameDesc);
/**
* Run the game
*/
void runGame(Common::SeekableReadStream *gameFile);
/**
* Returns the running interpreter type
*/
virtual InterpreterType getInterpreterType() const override { return INTERPRETER_ALAN2; }
/**
* Load a savegame from the passed stream
*/
virtual Common::Error loadGameData(strid_t file) override;
/**
* Save the game to the passed stream
*/
virtual Common::Error saveGameData(strid_t file, const Common::String &desc) override;
/**
* Output a string to the screen
*/
void output(const Common::String str);
/**
* Print a message from the message table
*/
void printMessage(MsgKind msg);
/**
* Print an error from the message table, force new player input and abort
*/
void printError(MsgKind msg);
/**
* Make a new paragraph, i.e one empty line (one or two newlines)
*/
void paragraph();
/**
* Print the the status line on the top of the screen
*/
void statusLine();
/**
* Make a newline, but check for screen full
*/
void newLine();
// Engine variables
Alan2Stack *_stack;
int pc;
ParamElem *params;
Aword *memory; // The Amachine memory
int memTop; // Top of memory
CurVars cur; // Amachine variables
int col;
bool fail;
int scores[100]; // FIXME: type + size
AcdHdr *header;
bool _needSpace; // originally "needsp"
EvtElem *evts; // Event table pointer
bool looking; // LOOKING? flag
int dscrstkp; // Describe-stack pointer
Common::File *_txtFile;
bool _anyOutput;
winid_t _bottomWindow;
Decode *_decode;
Execute *_execute;
Interpreter *_interpreter;
SaveLoad *_saveLoad;
};
extern Alan2 *_vm;
} // End of namespace Alan2
} // End of namespace Glk
#endif
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