/*
** $Id: lcode.h,v 1.64.1.1 2017/04/19 17:20:42 roberto Exp $
** Code generator for Lua
** See Copyright Notice in lua.h
*/

#ifndef lcode_h
#define lcode_h

#include "llex.h"
#include "lobject.h"
#include "lopcodes.h"
#include "lparser.h"


/*
** Marks the end of a patch list. It is an invalid value both as an absolute
** address, and as a list link (would link an element to itself).
*/
#define NO_JUMP (-1)


/*
** grep "ORDER OPR" if you change these enums  (ORDER OP)
*/
typedef enum BinOpr {
    OPR_ADD, OPR_SUB, OPR_MUL, OPR_MOD, OPR_POW,
    OPR_DIV,
    OPR_IDIV,
    OPR_BAND, OPR_BOR, OPR_BXOR,
    OPR_SHL, OPR_SHR,
    OPR_CONCAT,
    OPR_EQ, OPR_LT, OPR_LE,
    OPR_NE, OPR_GT, OPR_GE,
    OPR_AND, OPR_OR,
    OPR_NOBINOPR
} BinOpr;


typedef enum UnOpr {
    OPR_MINUS,   // 代表一元负号运算符 -，用于取一个数的相反数
    OPR_BNOT,    // 代表一元按位取反运算符 ~，用于对一个整数的每个位进行取反。
    OPR_NOT,     // 代表一元逻辑非运算符 !，用于取一个布尔值的逻辑非。
    OPR_LEN,     // 代表长度运算符 #，用于获取一个表（Lua 中的数组或字典）的长度或元素数量。
    OPR_NOUNOPR  // 代表没有一元运算符的情况，可能用于表示一个特定的操作不涉及一元运算符。
} UnOpr;


/* get (pointer to) instruction of given 'expdesc' */
#define getinstruction(fs, e)  ((fs)->f->code[(e)->u.info])

#define luaK_codeAsBx(fs, o, A, sBx)  luaK_codeABx(fs,o,A,(sBx)+MAXARG_sBx)

#define luaK_setmultret(fs, e)  luaK_setreturns(fs, e, LUA_MULTRET)

#define luaK_jumpto(fs, t)  luaK_patchlist(fs, luaK_jump(fs), t)

LUAI_FUNC int luaK_codeABx(FuncState *fs, OpCode o, int A, unsigned int Bx);

LUAI_FUNC int luaK_codeABC(FuncState *fs, OpCode o, int A, int B, int C);

LUAI_FUNC int luaK_codek(FuncState *fs, int reg, int k);

LUAI_FUNC void luaK_fixline(FuncState *fs, int line);

LUAI_FUNC void luaK_nil(FuncState *fs, int from, int n);

LUAI_FUNC void luaK_reserveregs(FuncState *fs, int n);

LUAI_FUNC void luaK_checkstack(FuncState *fs, int n);

LUAI_FUNC int luaK_stringK(FuncState *fs, TString *s);

LUAI_FUNC int luaK_intK(FuncState *fs, lua_Integer n);

LUAI_FUNC void luaK_dischargevars(FuncState *fs, expdesc *e);

LUAI_FUNC int luaK_exp2anyreg(FuncState *fs, expdesc *e);

LUAI_FUNC void luaK_exp2anyregup(FuncState *fs, expdesc *e);

LUAI_FUNC void luaK_exp2nextreg(FuncState *fs, expdesc *e);

LUAI_FUNC void luaK_exp2val(FuncState *fs, expdesc *e);

LUAI_FUNC int luaK_exp2RK(FuncState *fs, expdesc *e);

LUAI_FUNC void luaK_self(FuncState *fs, expdesc *e, expdesc *key);

LUAI_FUNC void luaK_indexed(FuncState *fs, expdesc *t, expdesc *k);

LUAI_FUNC void luaK_goiftrue(FuncState *fs, expdesc *e);

LUAI_FUNC void luaK_goiffalse(FuncState *fs, expdesc *e);

LUAI_FUNC void luaK_storevar(FuncState *fs, expdesc *var, expdesc *e);

LUAI_FUNC void luaK_setreturns(FuncState *fs, expdesc *e, int nresults);

LUAI_FUNC void luaK_setoneret(FuncState *fs, expdesc *e);

LUAI_FUNC int luaK_jump(FuncState *fs);

LUAI_FUNC void luaK_ret(FuncState *fs, int first, int nret);

LUAI_FUNC void luaK_patchlist(FuncState *fs, int list, int target);

LUAI_FUNC void luaK_patchtohere(FuncState *fs, int list);

LUAI_FUNC void luaK_patchclose(FuncState *fs, int list, int level);

LUAI_FUNC void luaK_concat(FuncState *fs, int *l1, int l2);

LUAI_FUNC int luaK_getlabel(FuncState *fs);

LUAI_FUNC void luaK_prefix(FuncState *fs, UnOpr op, expdesc *v, int line);

LUAI_FUNC void luaK_infix(FuncState *fs, BinOpr op, expdesc *v);

LUAI_FUNC void luaK_posfix(FuncState *fs, BinOpr op, expdesc *v1,
                           expdesc *v2, int line);

LUAI_FUNC void luaK_setlist(FuncState *fs, int base, int nelems, int tostore);


#endif