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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 DRACI_SCRIPT_H
#define DRACI_SCRIPT_H
#include "common/str.h"
#include "common/stream.h"
#include "common/queue.h"
namespace Draci {
/** The maximum number of parameters for a GPL command */
const int kMaxParams = 3;
class DraciEngine;
class Script;
enum {
kNumCommands = 55
};
// TODO(spalek): shouldn't modify params passed by reference. Either make it const or copy the parameter.
typedef void (Script::*GPLHandler)(Common::Queue<int> &);
typedef int (Script::*GPLOperatorHandler)(int, int) const;
typedef int (Script::*GPLFunctionHandler)(int) const;
/**
* Represents a single command in the GPL scripting language bytecode.
* Each command is represented in the bytecode by a command number and a
* subnumber.
*/
struct GPL2Command {
byte _number;
byte _subNumber;
const char *_name;
uint16 _numParams;
int _paramTypes[kMaxParams];
GPLHandler _handler;
};
struct GPL2Operator {
const char *_name;
GPLOperatorHandler _handler;
};
struct GPL2Function {
const char *_name;
GPLFunctionHandler _handler;
};
/**
* A convenience data type that holds both the actual bytecode and the
* length of the bytecode. Passed to Script::run().
*/
struct GPL2Program {
GPL2Program() : _bytecode(NULL), _length(0) {}
byte *_bytecode;
uint16 _length;
};
class Script {
public:
Script(DraciEngine *vm) : _vm(vm), _jump(0) { setupCommandList(); };
int run(const GPL2Program &program, uint16 offset);
bool testExpression(const GPL2Program &program, uint16 offset) const;
void endCurrentProgram();
private:
int _jump;
bool _endProgram;
/** List of all GPL commands. Initialised in the constructor. */
const GPL2Command *_commandList;
const GPL2Operator *_operatorList;
const GPL2Function *_functionList;
void c_If(Common::Queue<int> ¶ms);
void c_Goto(Common::Queue<int> ¶ms);
void c_Let(Common::Queue<int> ¶ms);
void load(Common::Queue<int> ¶ms);
void start(Common::Queue<int> ¶ms);
void mark(Common::Queue<int> ¶ms);
void release(Common::Queue<int> ¶ms);
void icoStat(Common::Queue<int> ¶ms);
void objStat(Common::Queue<int> ¶ms);
void objStatOn(Common::Queue<int> ¶ms);
void execInit(Common::Queue<int> ¶ms);
void execLook(Common::Queue<int> ¶ms);
void execUse(Common::Queue<int> ¶ms);
void walkOn(Common::Queue<int> ¶ms);
void walkOnPlay(Common::Queue<int> ¶ms);
void play(Common::Queue<int> ¶ms);
void startPlay(Common::Queue<int> ¶ms);
void newRoom(Common::Queue<int> ¶ms);
void talk(Common::Queue<int> ¶ms);
void loadMap(Common::Queue<int> ¶ms);
void roomMap(Common::Queue<int> ¶ms);
void dialogue(Common::Queue<int> ¶ms);
void exitDialogue(Common::Queue<int> ¶ms);
void resetDialogue(Common::Queue<int> ¶ms);
void resetDialogueFrom(Common::Queue<int> ¶ms);
void resetBlock(Common::Queue<int> ¶ms);
void setPalette(Common::Queue<int> ¶ms);
void blackPalette(Common::Queue<int> ¶ms);
void loadPalette(Common::Queue<int> ¶ms);
int operAnd(int op1, int op2) const;
int operOr(int op1, int op2) const;
int operXor(int op1, int op2) const;
int operSub(int op1, int op2) const;
int operAdd(int op1, int op2) const;
int operDiv(int op1, int op2) const;
int operMul(int op1, int op2) const;
int operEqual(int op1, int op2) const;
int operNotEqual(int op1, int op2) const;
int operGreater(int op1, int op2) const;
int operLess(int op1, int op2) const;
int operGreaterOrEqual(int op1, int op2) const;
int operLessOrEqual(int op1, int op2) const;
int operMod(int op1, int op2) const;
int funcRandom(int n) const;
int funcNot(int n) const;
int funcIsIcoOn(int iconID) const;
int funcIcoStat(int iconID) const;
int funcActIco(int iconID) const;
int funcIsIcoAct(int iconID) const;
int funcIsObjOn(int objID) const;
int funcIsObjOff(int objID) const;
int funcIsObjAway(int objID) const;
int funcActPhase(int objID) const;
int funcObjStat(int objID) const;
int funcLastBlock(int blockID) const;
int funcAtBegin(int yesno) const;
int funcBlockVar(int blockID) const;
int funcHasBeen(int blockID) const;
int funcMaxLine(int lines) const;
void setupCommandList();
const GPL2Command *findCommand(byte num, byte subnum) const;
int handleMathExpression(Common::MemoryReadStream *reader) const;
DraciEngine *_vm;
};
} // end of namespace Draci
#endif // DRACI_SCRIPT_H
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