mirror of
https://github.com/libretro/scummvm.git
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142 lines
2.8 KiB
C++
142 lines
2.8 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef PRIVATE_GRAMMAR_H
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#define PRIVATE_GRAMMAR_H
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#include "common/str.h"
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#include "common/hash-str.h"
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#include "common/hash-ptr.h"
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#include "common/queue.h"
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#include "common/list.h"
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#include "common/array.h"
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#include "common/rect.h"
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#include "private/symbol.h"
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#define NSTACK 256
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#define NPROG 10000
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namespace Private {
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typedef struct Datum { /* interpreter stack type */
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short type;
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union {
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int val;
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const char *str;
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Symbol *sym;
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Common::Rect *rect;
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} u;
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} Datum;
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typedef struct Arg {
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int n;
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int (** inst)();
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} Arg;
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typedef int (* Inst)(); /* machine instruction */
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#define STOP (Inst) 0
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typedef Common::HashMap<void *, Common::String *> PtrToName;
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void initInsts();
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void initFuncs();
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namespace Settings {
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typedef struct Setting {
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Datum stack[NSTACK]; /* the stack */
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Inst prog[NPROG]; /* the machine */
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} Setting;
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typedef Common::HashMap<Common::String, Setting *> SettingMap;
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class SettingMaps {
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public:
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Setting *_setting;
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SettingMap _map;
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void init();
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void save(const char *);
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void load(const Common::String &);
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};
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extern SettingMaps *g_setts;
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}
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// Funtions
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typedef Common::Array<Datum> ArgArray;
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void call(const char *, const ArgArray &);
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// Code Generation and Execution
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namespace Gen {
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class VM {
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public:
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Datum *_stack; /* the stack */
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Datum *_stackp; /* next free spot on stack */
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Inst *_progp; /* next free spot for code generation */
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Inst *_prog; /* the machine */
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Inst *_pc; /* program counter during execution */
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void run(); /* run the virtual machine */
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};
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extern VM *g_vm;
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Datum pop();
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int push(const Datum &);
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Inst *code(const Inst &);
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int eval();
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int add();
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int negate();
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int power();
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int assign();
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int bltin();
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int varpush();
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int constpush();
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int strpush();
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int funcpush();
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int print();
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int ifcode();
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int fail();
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int lt();
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int gt();
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int le();
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int ge();
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int eq();
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int ne();
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int randbool();
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// Code Execution
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void execute(Inst *);
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}
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} // End of namespace Private
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#endif
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