mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-21 09:21:08 +00:00
145 lines
3.6 KiB
C++
145 lines
3.6 KiB
C++
/* 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 KYRA_SCRIPT_H
|
|
#define KYRA_SCRIPT_H
|
|
|
|
#include "common/stream.h"
|
|
#include "common/array.h"
|
|
#include "common/func.h"
|
|
|
|
namespace Kyra {
|
|
|
|
struct EMCState;
|
|
typedef Common::Functor1<EMCState*, int> Opcode;
|
|
|
|
struct EMCData {
|
|
char filename[13];
|
|
|
|
byte *text;
|
|
uint16 *data;
|
|
uint16 *ordr;
|
|
uint16 dataSize;
|
|
|
|
const Common::Array<const Opcode*> *opcodes;
|
|
};
|
|
|
|
struct EMCState {
|
|
enum {
|
|
kStackSize = 100,
|
|
kStackLastEntry = kStackSize - 1
|
|
};
|
|
|
|
const uint16 *ip;
|
|
const EMCData *dataPtr;
|
|
int16 retValue;
|
|
uint16 bp;
|
|
uint16 sp;
|
|
int16 regs[30]; // VM registers
|
|
int16 stack[kStackSize]; // VM stack
|
|
};
|
|
|
|
#define stackPos(x) (script->stack[script->sp+x])
|
|
#define stackPosString(x) ((const char*)&script->dataPtr->text[READ_BE_UINT16(&script->dataPtr->text[stackPos(x)<<1])])
|
|
|
|
#define FORM_CHUNK 0x4D524F46
|
|
#define TEXT_CHUNK 0x54584554
|
|
#define DATA_CHUNK 0x41544144
|
|
#define ORDR_CHUNK 0x5244524F
|
|
#define AVTL_CHUNK 0x4C545641
|
|
|
|
class Resource;
|
|
class KyraEngine_v1;
|
|
|
|
class IFFParser {
|
|
public:
|
|
IFFParser() : _stream(0), _startOffset(0), _endOffset(0) {}
|
|
IFFParser(const char *filename, Resource *res) : _stream(0), _startOffset(0), _endOffset(0) { setFile(filename, res); }
|
|
~IFFParser() { destroy(); }
|
|
|
|
void setFile(const char *filename, Resource *res);
|
|
|
|
operator bool() const { return (_startOffset != _endOffset) && _stream; }
|
|
|
|
uint32 getFORMBlockSize();
|
|
uint32 getBlockSize(const uint32 chunk);
|
|
bool loadBlock(const uint32 chunk, void *loadTo, uint32 ptrSize);
|
|
private:
|
|
void destroy();
|
|
|
|
Common::SeekableReadStream *_stream;
|
|
uint32 _startOffset;
|
|
uint32 _endOffset;
|
|
};
|
|
|
|
class EMCInterpreter {
|
|
public:
|
|
EMCInterpreter(KyraEngine_v1 *vm);
|
|
|
|
bool load(const char *filename, EMCData *data, const Common::Array<const Opcode*> *opcodes);
|
|
void unload(EMCData *data);
|
|
|
|
void init(EMCState *scriptState, const EMCData *data);
|
|
bool start(EMCState *script, int function);
|
|
|
|
bool isValid(EMCState *script);
|
|
|
|
bool run(EMCState *script);
|
|
protected:
|
|
KyraEngine_v1 *_vm;
|
|
int16 _parameter;
|
|
|
|
typedef void (EMCInterpreter::*CommandProc)(EMCState*);
|
|
struct CommandEntry {
|
|
CommandProc proc;
|
|
const char *desc;
|
|
};
|
|
|
|
const CommandEntry *_commands;
|
|
private:
|
|
void cmd_jmpTo(EMCState*);
|
|
void cmd_setRetValue(EMCState*);
|
|
void cmd_pushRetOrPos(EMCState*);
|
|
void cmd_push(EMCState*);
|
|
void cmd_pushReg(EMCState*);
|
|
void cmd_pushBPNeg(EMCState*);
|
|
void cmd_pushBPAdd(EMCState*);
|
|
void cmd_popRetOrPos(EMCState*);
|
|
void cmd_popReg(EMCState*);
|
|
void cmd_popBPNeg(EMCState*);
|
|
void cmd_popBPAdd(EMCState*);
|
|
void cmd_addSP(EMCState*);
|
|
void cmd_subSP(EMCState*);
|
|
void cmd_execOpcode(EMCState*);
|
|
void cmd_ifNotJmp(EMCState*);
|
|
void cmd_negate(EMCState*);
|
|
void cmd_eval(EMCState*);
|
|
void cmd_setRetAndJmp(EMCState*);
|
|
};
|
|
} // end of namespace Kyra
|
|
|
|
#endif
|
|
|