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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.
*
* $URL$
* $Id$
*
*/
#ifndef SCI_INCLUDE_ENGINE_H
#define SCI_INCLUDE_ENGINE_H
#include "common/scummsys.h"
#include "common/array.h"
#include "common/serializer.h"
#include "common/str-array.h"
namespace Common {
class SeekableReadStream;
class WriteStream;
}
#include "sci/sci.h"
#include "sci/engine/seg_manager.h"
#include "sci/parser/vocabulary.h"
#ifdef USE_OLD_MUSIC_FUNCTIONS
#include "sci/sound/iterator/core.h"
#endif
#include "sci/sound/soundcmd.h"
namespace Sci {
class SciEvent;
class MessageState;
class SoundCommandParser;
class DirSeeker {
protected:
reg_t _outbuffer;
Common::StringArray _savefiles;
Common::StringArray::const_iterator _iter;
public:
DirSeeker() {
_outbuffer = NULL_REG;
_iter = _savefiles.begin();
}
reg_t firstFile(const Common::String &mask, reg_t buffer, SegManager *segMan);
reg_t nextFile(SegManager *segMan);
};
enum {
MAX_SAVE_DIR_SIZE = MAXPATHLEN
};
/** values for EngineState.restarting_flag */
enum {
SCI_GAME_IS_NOT_RESTARTING = 0,
SCI_GAME_WAS_RESTARTED = 1,
SCI_GAME_IS_RESTARTING_NOW = 2
};
class FileHandle {
public:
Common::String _name;
Common::SeekableReadStream *_in;
Common::WriteStream *_out;
public:
FileHandle();
~FileHandle();
void close();
bool isOpen() const;
};
struct EngineState : public Common::Serializable {
public:
EngineState(Vocabulary *voc, SegManager *segMan);
virtual ~EngineState();
virtual void saveLoadWithSerializer(Common::Serializer &ser);
public:
SegManager *_segMan; /**< The segment manager */
Vocabulary *_voc;
/* Non-VM information */
SciEvent *_event; // Event handling
#ifdef USE_OLD_MUSIC_FUNCTIONS
SfxState _sound; /**< sound subsystem */
int sfx_init_flags; /**< flags the sfx subsystem was initialised with */
#endif
SoundCommandParser *_soundCmd;
byte restarting_flags; /**< Flags used for restarting */
uint32 game_start_time; /**< The time at which the interpreter was started */
uint32 last_wait_time; /**< The last time the game invoked Wait() */
void wait(int16 ticks);
uint32 _throttleCounter; /**< total times kAnimate was invoked */
uint32 _throttleLastTime; /**< last time kAnimate was invoked */
bool _throttleTrigger;
/* Kernel File IO stuff */
Common::Array<FileHandle> _fileHandles; /**< Array of file handles. Dynamically increased if required. */
DirSeeker _dirseeker;
public:
/* VM Information */
Common::List<ExecStack> _executionStack; /**< The execution stack */
/**
* When called from kernel functions, the vm is re-started recursively on
* the same stack. This variable contains the stack base for the current vm.
*/
int execution_stack_base;
bool _executionStackPosChanged; /**< Set to true if the execution stack position should be re-evaluated by the vm */
reg_t r_acc; /**< Accumulator */
int16 restAdjust; /**< &rest register (only used for save games) */
reg_t r_prev; /**< previous comparison result */
StackPtr stack_base; /**< Pointer to the least stack element */
StackPtr stack_top; /**< First invalid stack element */
Script *script_000; /**< script 000, e.g. for globals */
uint16 currentRoomNumber() const;
void setRoomNumber(uint16 roomNumber);
/**
* Shrink execution stack to size.
* Contains an assert it is not already smaller.
*/
void shrinkStackToBase();
/* System strings */
SegmentId sys_strings_segment;
SystemStrings *sys_strings;
reg_t _gameObj; /**< Pointer to the game object */
int gc_countdown; /**< Number of kernel calls until next gc */
public:
MessageState *_msgState;
// MemorySegment provides access to a 256-byte block of memory that remains
// intact across restarts and restores
enum {
kMemorySegmentMax = 256
};
uint _memorySegmentSize;
byte _memorySegment[kMemorySegmentMax];
EngineState *successor; /**< Successor of this state: Used for restoring */
};
} // End of namespace Sci
#endif // SCI_INCLUDE_ENGINE_H
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