mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-17 07:07:10 +00:00
142 lines
2.8 KiB
C++
142 lines
2.8 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 3 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, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#ifndef PRIVATE_GRAMMAR_H
|
|
#define PRIVATE_GRAMMAR_H
|
|
|
|
#include "common/str.h"
|
|
#include "common/hash-str.h"
|
|
#include "common/hash-ptr.h"
|
|
#include "common/queue.h"
|
|
#include "common/list.h"
|
|
#include "common/array.h"
|
|
#include "common/rect.h"
|
|
|
|
#include "private/symbol.h"
|
|
|
|
#define NSTACK 256
|
|
#define NPROG 10000
|
|
|
|
namespace Private {
|
|
|
|
typedef struct Datum { /* interpreter stack type */
|
|
short type;
|
|
union {
|
|
int val;
|
|
const char *str;
|
|
Symbol *sym;
|
|
Common::Rect *rect;
|
|
} u;
|
|
} Datum;
|
|
|
|
typedef struct Arg {
|
|
int n;
|
|
int (** inst)();
|
|
} Arg;
|
|
|
|
typedef int (* Inst)(); /* machine instruction */
|
|
#define STOP (Inst) 0
|
|
|
|
typedef Common::HashMap<void *, Common::String *> PtrToName;
|
|
|
|
void initInsts();
|
|
void initFuncs();
|
|
|
|
namespace Settings {
|
|
|
|
typedef struct Setting {
|
|
Datum stack[NSTACK]; /* the stack */
|
|
Inst prog[NPROG]; /* the machine */
|
|
} Setting;
|
|
|
|
typedef Common::HashMap<Common::String, Setting *> SettingMap;
|
|
|
|
class SettingMaps {
|
|
public:
|
|
Setting *_setting;
|
|
SettingMap _map;
|
|
|
|
void init();
|
|
void save(const char *);
|
|
void load(const Common::String &);
|
|
};
|
|
|
|
extern SettingMaps *g_setts;
|
|
|
|
}
|
|
|
|
// Funtions
|
|
|
|
typedef Common::Array<Datum> ArgArray;
|
|
void call(const char *, const ArgArray &);
|
|
|
|
// Code Generation and Execution
|
|
|
|
namespace Gen {
|
|
|
|
class VM {
|
|
public:
|
|
Datum *_stack; /* the stack */
|
|
Datum *_stackp; /* next free spot on stack */
|
|
|
|
Inst *_progp; /* next free spot for code generation */
|
|
Inst *_prog; /* the machine */
|
|
Inst *_pc; /* program counter during execution */
|
|
void run(); /* run the virtual machine */
|
|
};
|
|
|
|
extern VM *g_vm;
|
|
|
|
Datum pop();
|
|
int push(const Datum &);
|
|
|
|
Inst *code(const Inst &);
|
|
int eval();
|
|
int add();
|
|
int negate();
|
|
int power();
|
|
int assign();
|
|
int bltin();
|
|
int varpush();
|
|
int constpush();
|
|
int strpush();
|
|
int funcpush();
|
|
int print();
|
|
int ifcode();
|
|
int fail();
|
|
int lt();
|
|
int gt();
|
|
int le();
|
|
int ge();
|
|
int eq();
|
|
int ne();
|
|
int randbool();
|
|
|
|
// Code Execution
|
|
|
|
void execute(Inst *);
|
|
|
|
}
|
|
|
|
} // End of namespace Private
|
|
|
|
#endif
|