/*
** $Id: lcode.h $
** 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 {
    /* arithmetic operators */
    OPR_ADD, OPR_SUB, OPR_MUL, OPR_MOD, OPR_POW,
    OPR_DIV, OPR_IDIV,
    /* bitwise operators */
    OPR_BAND, OPR_BOR, OPR_BXOR,
    OPR_SHL, OPR_SHR,
    /* string operator */
    OPR_CONCAT,
    /* comparison operators */
    OPR_EQ, OPR_LT, OPR_LE,
    OPR_NE, OPR_GT, OPR_GE,
    /* logical operators */
    OPR_AND, OPR_OR,
    OPR_NOBINOPR
} BinOpr;


/* true if operation is foldable (that is, it is arithmetic or bitwise) */
#define foldbinop(op)	((op) <= OPR_SHR)


#define luaK_codeABC(fs,o,a,b,c)	luaK_codeABCk(fs,o,a,b,c,0)


typedef enum UnOpr { OPR_MINUS, OPR_BNOT, OPR_NOT, OPR_LEN, OPR_NOUNOPR } UnOpr;


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


#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_code(FuncState *fs, Instruction i);
LUAI_FUNC int luaK_codeABx(FuncState *fs, OpCode o, int A, unsigned int Bx);
LUAI_FUNC int luaK_codeABCk(FuncState *fs, OpCode o, int A,
                            int B, int C, int k);
LUAI_FUNC int luaK_exp2const(FuncState *fs, const expdesc *e, TValue *v);
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 void luaK_int(FuncState *fs, int reg, 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 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_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_settablesize(FuncState *fs, int pc,
                                 int ra, int asize, int hsize);
LUAI_FUNC void luaK_setlist(FuncState *fs, int base, int nelems, int tostore);
LUAI_FUNC void luaK_finish(FuncState *fs);
LUAI_FUNC l_noret luaK_semerror(LexState *ls, const char *msg);


#endif