lvm.c File Reference

#include "lprefix.h"
#include <float.h>
#include <limits.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "lua.h"
#include "ldebug.h"
#include "ldo.h"
#include "lfunc.h"
#include "lgc.h"
#include "lobject.h"
#include "lopcodes.h"
#include "lstate.h"
#include "lstring.h"
#include "ltable.h"
#include "ltm.h"
#include "lvm.h"

Go to the source code of this file.

Macros
#define	lvm_c
#define	LUA_CORE
#define	LUA_USE_JUMPTABLE   0
#define	MAXTAGLOOP   2000
#define	NBM   (l_floatatt(MANT_DIG))
#define	l_intfitsf(i)   1
#define	tostring(L, o)    (ttisstring(o) || (cvt2str(o) && (luaO_tostring(L, o), 1)))
#define	isemptystr(o)   (ttisshrstring(o) && tsvalue(o)->shrlen == 0)
#define	NBITS   cast_int(sizeof(lua_Integer) * CHAR_BIT)
#define	luaV_shiftr(x, y)   luaV_shiftl(x,-(y))
#define	l_addi(L, a, b)   intop(+, a, b)
#define	l_subi(L, a, b)   intop(-, a, b)
#define	l_muli(L, a, b)   intop(*, a, b)
#define	l_band(a, b)   intop(&, a, b)
#define	l_bor(a, b)   intop(|, a, b)
#define	l_bxor(a, b)   intop(^, a, b)
#define	l_lti(a, b)   (a < b)
#define	l_lei(a, b)   (a <= b)
#define	l_gti(a, b)   (a > b)
#define	l_gei(a, b)   (a >= b)
#define	op_arithI(L, iop, fop)
#define	op_arithf_aux(L, v1, v2, fop)
#define	op_arithf(L, fop)
#define	op_arithfK(L, fop)
#define	op_arith_aux(L, v1, v2, iop, fop)
#define	op_arith(L, iop, fop)
#define	op_arithK(L, iop, fop)
#define	op_bitwiseK(L, op)
#define	op_bitwise(L, op)
#define	op_order(L, opi, opn, other)
#define	op_orderI(L, opi, opf, inv, tm)
#define	RA(i)   (base+GETARG_A(i))
#define	RB(i)   (base+GETARG_B(i))
#define	vRB(i)   s2v(RB(i))
#define	KB(i)   (k+GETARG_B(i))
#define	RC(i)   (base+GETARG_C(i))
#define	vRC(i)   s2v(RC(i))
#define	KC(i)   (k+GETARG_C(i))
#define	RKC(i)   ((TESTARG_k(i)) ? k + GETARG_C(i) : s2v(base + GETARG_C(i)))
#define	updatetrap(ci)   (trap = ci->u.l.trap)
#define	updatebase(ci)   (base = ci->func + 1)
#define	updatestack(ci)    { if (l_unlikely(trap)) { updatebase(ci); ra = RA(i); } }
#define	dojump(ci, i, e)   { pc += GETARG_sJ(i) + e; updatetrap(ci); }
#define	donextjump(ci)   { Instruction ni = *pc; dojump(ci, ni, 1); }
#define	docondjump()   if (cond != GETARG_k(i)) pc++; else donextjump(ci);
#define	savepc(L)   (ci->u.l.savedpc = pc)
#define	savestate(L, ci)   (savepc(L), L->top = ci->top)
#define	Protect(exp)   (savestate(L,ci), (exp), updatetrap(ci))
#define	ProtectNT(exp)   (savepc(L), (exp), updatetrap(ci))
#define	halfProtect(exp)   (savestate(L,ci), (exp))
#define	checkGC(L, c)
#define	vmfetch()
#define	vmdispatch(o)   switch(o)
#define	vmcase(l)   case l:
#define	vmbreak   break

Functions
static int	l_strton (const TValue *obj, TValue *result)
int	luaV_tonumber_ (const TValue *obj, lua_Number *n)
int	luaV_flttointeger (lua_Number n, lua_Integer *p, F2Imod mode)
int	luaV_tointegerns (const TValue *obj, lua_Integer *p, F2Imod mode)
int	luaV_tointeger (const TValue *obj, lua_Integer *p, F2Imod mode)
static int	forlimit (lua_State *L, lua_Integer init, const TValue *lim, lua_Integer *p, lua_Integer step)
static int	forprep (lua_State *L, StkId ra)
static int	floatforloop (StkId ra)
void	luaV_finishget (lua_State *L, const TValue *t, TValue *key, StkId val, const TValue *slot)
void	luaV_finishset (lua_State *L, const TValue *t, TValue *key, TValue *val, const TValue *slot)
static int	l_strcmp (const TString *ls, const TString *rs)
static int	LTintfloat (lua_Integer i, lua_Number f)
static int	LEintfloat (lua_Integer i, lua_Number f)
static int	LTfloatint (lua_Number f, lua_Integer i)
static int	LEfloatint (lua_Number f, lua_Integer i)
static int	LTnum (const TValue *l, const TValue *r)
static int	LEnum (const TValue *l, const TValue *r)
static int	lessthanothers (lua_State *L, const TValue *l, const TValue *r)
int	luaV_lessthan (lua_State *L, const TValue *l, const TValue *r)
static int	lessequalothers (lua_State *L, const TValue *l, const TValue *r)
int	luaV_lessequal (lua_State *L, const TValue *l, const TValue *r)
int	luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2)
static void	copy2buff (StkId top, int n, char *buff)
void	luaV_concat (lua_State *L, int total)
void	luaV_objlen (lua_State *L, StkId ra, const TValue *rb)
lua_Integer	luaV_idiv (lua_State *L, lua_Integer m, lua_Integer n)
lua_Integer	luaV_mod (lua_State *L, lua_Integer m, lua_Integer n)
lua_Number	luaV_modf (lua_State *L, lua_Number m, lua_Number n)
lua_Integer	luaV_shiftl (lua_Integer x, lua_Integer y)
static void	pushclosure (lua_State *L, Proto *p, UpVal **encup, StkId base, StkId ra)
void	luaV_finishOp (lua_State *L)
void	luaV_execute (lua_State *L, CallInfo *ci)

Macro Definition Documentation

checkGC

#define checkGC	(		L,
			c )

Value:

    { luaC_condGC(L, (savepc(L), L->top = (c)), \
                         updatetrap(ci)); \
           luai_threadyield(L); }

Definition at line 1108 of file lua-5.4.3/src/lvm.c.

#define checkGC(L,c)  \
    { luaC_condGC(L, (savepc(L), L->top = (c)), \
                         updatetrap(ci)); \
           luai_threadyield(L); }

Referenced by luaV_execute().

docondjump

#define docondjump

(

)

if (cond != GETARG_k(i)) pc++; else donextjump(ci);

Definition at line 1076 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

dojump

#define dojump	(		ci,
			i,
			e )   { pc += GETARG_sJ(i) + e; updatetrap(ci); }

Definition at line 1065 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

donextjump

#define donextjump

(

ci

)

{ Instruction ni = *pc; dojump(ci, ni, 1); }

Definition at line 1069 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

halfProtect

#define halfProtect

(

exp

)

(savestate(L,ci), (exp))

Definition at line 1105 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

isemptystr

#define isemptystr

(

o

)

(ttisshrstring(o) && tsvalue(o)->shrlen == 0)

Definition at line 621 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_concat().

KB

#define KB

(

i

)

(k+GETARG_B(i))

Definition at line 1044 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

KC

#define KC

(

i

)

(k+GETARG_C(i))

Definition at line 1047 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

l_addi

#define l_addi	(		L,
			a,
			b )   intop(+, a, b)

Definition at line 873 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

l_band

#define l_band	(		a,
			b )   intop(&, a, b)

Definition at line 876 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

l_bor

#define l_bor	(		a,
			b )   intop(|, a, b)

Definition at line 877 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

l_bxor

#define l_bxor	(		a,
			b )   intop(^, a, b)

Definition at line 878 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

l_gei

#define l_gei	(		a,
			b )   (a >= b)

Definition at line 883 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

l_gti

#define l_gti	(		a,
			b )   (a > b)

Definition at line 882 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

l_intfitsf

#define l_intfitsf

(

i

)

1

Definition at line 78 of file lua-5.4.3/src/lvm.c.

Referenced by LEfloatint(), LEintfloat(), LEintfloat(), LTfloatint(), LTintfloat(), and LTintfloat().

l_lei

#define l_lei	(		a,
			b )   (a <= b)

Definition at line 881 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

l_lti

#define l_lti	(		a,
			b )   (a < b)

Definition at line 880 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

l_muli

#define l_muli	(		L,
			a,
			b )   intop(*, a, b)

Definition at line 875 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

l_subi

#define l_subi	(		L,
			a,
			b )   intop(-, a, b)

Definition at line 874 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

LUA_CORE

#define LUA_CORE

Definition at line 8 of file lua-5.4.3/src/lvm.c.

LUA_USE_JUMPTABLE

#define LUA_USE_JUMPTABLE   0

Definition at line 42 of file lua-5.4.3/src/lvm.c.

luaV_shiftr

#define luaV_shiftr	(		x,
			y )   luaV_shiftl(x,-(y))

Definition at line 769 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

lvm_c

#define lvm_c

Definition at line 7 of file lua-5.4.3/src/lvm.c.

MAXTAGLOOP

#define MAXTAGLOOP   2000

Definition at line 49 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_finishget(), and luaV_finishset().

NBITS

#define NBITS   cast_int(sizeof(lua_Integer) * CHAR_BIT)

Definition at line 764 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_shiftl().

NBM

#define NBM   (l_floatatt(MANT_DIG))

Definition at line 58 of file lua-5.4.3/src/lvm.c.

op_arith

#define op_arith	(		L,
			iop,
			fop )

Value:

  {  \
  TValue *v1 = vRB(i);  \
  TValue *v2 = vRC(i);  \
  op_arith_aux(L, v1, v2, iop, fop); }

Definition at line 947 of file lua-5.4.3/src/lvm.c.

#define op_arith(L,iop,fop) {  \
  TValue *v1 = vRB(i);  \
  TValue *v2 = vRC(i);  \
  op_arith_aux(L, v1, v2, iop, fop); }

Referenced by luaV_execute().

op_arith_aux

#define op_arith_aux	(		L,
			v1,
			v2,
			iop,
			fop )

Value:

  {  \
  if (ttisinteger(v1) && ttisinteger(v2)) {  \
    lua_Integer i1 = ivalue(v1); lua_Integer i2 = ivalue(v2);  \
    pc++; setivalue(s2v(ra), iop(L, i1, i2));  \
  }  \
  else op_arithf_aux(L, v1, v2, fop); }

Definition at line 936 of file lua-5.4.3/src/lvm.c.

#define op_arith_aux(L,v1,v2,iop,fop) {  \
  if (ttisinteger(v1) && ttisinteger(v2)) {  \
    lua_Integer i1 = ivalue(v1); lua_Integer i2 = ivalue(v2);  \
    pc++; setivalue(s2v(ra), iop(L, i1, i2));  \
  }  \
  else op_arithf_aux(L, v1, v2, fop); }

op_arithf

#define op_arithf	(		L,
			fop )

Value:

  {  \
  TValue *v1 = vRB(i);  \
  TValue *v2 = vRC(i);  \
  op_arithf_aux(L, v1, v2, fop); }

Definition at line 918 of file lua-5.4.3/src/lvm.c.

#define op_arithf(L,fop) {  \
  TValue *v1 = vRB(i);  \
  TValue *v2 = vRC(i);  \
  op_arithf_aux(L, v1, v2, fop); }

Referenced by luaV_execute().

op_arithf_aux

#define op_arithf_aux	(		L,
			v1,
			v2,
			fop )

Value:

  {  \
  lua_Number n1; lua_Number n2;  \
  if (tonumberns(v1, n1) && tonumberns(v2, n2)) {  \
    pc++; setfltvalue(s2v(ra), fop(L, n1, n2));  \
  }}

Definition at line 908 of file lua-5.4.3/src/lvm.c.

#define op_arithf_aux(L,v1,v2,fop) {  \
  lua_Number n1; lua_Number n2;  \
  if (tonumberns(v1, n1) && tonumberns(v2, n2)) {  \
    pc++; setfltvalue(s2v(ra), fop(L, n1, n2));  \
  }}

op_arithfK

#define op_arithfK	(		L,
			fop )

Value:

  {  \
  TValue *v1 = vRB(i);  \
  TValue *v2 = KC(i); lua_assert(ttisnumber(v2));  \
  op_arithf_aux(L, v1, v2, fop); }

Definition at line 927 of file lua-5.4.3/src/lvm.c.

#define op_arithfK(L,fop) {  \
  TValue *v1 = vRB(i);  \
  TValue *v2 = KC(i); lua_assert(ttisnumber(v2));  \
  op_arithf_aux(L, v1, v2, fop); }

Referenced by luaV_execute().

op_arithI

#define op_arithI	(		L,
			iop,
			fop )

Value:

  {  \
  TValue *v1 = vRB(i);  \
  int imm = GETARG_sC(i);  \
  if (ttisinteger(v1)) {  \
    lua_Integer iv1 = ivalue(v1);  \
    pc++; setivalue(s2v(ra), iop(L, iv1, imm));  \
  }  \
  else if (ttisfloat(v1)) {  \
    lua_Number nb = fltvalue(v1);  \
    lua_Number fimm = cast_num(imm);  \
    pc++; setfltvalue(s2v(ra), fop(L, nb, fimm)); \
  }}

Definition at line 890 of file lua-5.4.3/src/lvm.c.

#define op_arithI(L,iop,fop) {  \
  TValue *v1 = vRB(i);  \
  int imm = GETARG_sC(i);  \
  if (ttisinteger(v1)) {  \
    lua_Integer iv1 = ivalue(v1);  \
    pc++; setivalue(s2v(ra), iop(L, iv1, imm));  \
  }  \
  else if (ttisfloat(v1)) {  \
    lua_Number nb = fltvalue(v1);  \
    lua_Number fimm = cast_num(imm);  \
    pc++; setfltvalue(s2v(ra), fop(L, nb, fimm)); \
  }}

Referenced by luaV_execute().

op_arithK

#define op_arithK	(		L,
			iop,
			fop )

Value:

  {  \
  TValue *v1 = vRB(i);  \
  TValue *v2 = KC(i); lua_assert(ttisnumber(v2));  \
  op_arith_aux(L, v1, v2, iop, fop); }

Definition at line 956 of file lua-5.4.3/src/lvm.c.

#define op_arithK(L,iop,fop) {  \
  TValue *v1 = vRB(i);  \
  TValue *v2 = KC(i); lua_assert(ttisnumber(v2));  \
  op_arith_aux(L, v1, v2, iop, fop); }

Referenced by luaV_execute().

op_bitwise

#define op_bitwise	(		L,
			op )

Value:

  {  \
  TValue *v1 = vRB(i);  \
  TValue *v2 = vRC(i);  \
  lua_Integer i1; lua_Integer i2;  \
  if (tointegerns(v1, &i1) && tointegerns(v2, &i2)) {  \
    pc++; setivalue(s2v(ra), op(i1, i2));  \
  }}

Definition at line 978 of file lua-5.4.3/src/lvm.c.

#define op_bitwise(L,op) {  \
  TValue *v1 = vRB(i);  \
  TValue *v2 = vRC(i);  \
  lua_Integer i1; lua_Integer i2;  \
  if (tointegerns(v1, &i1) && tointegerns(v2, &i2)) {  \
    pc++; setivalue(s2v(ra), op(i1, i2));  \
  }}

Referenced by luaV_execute().

op_bitwiseK

#define op_bitwiseK	(		L,
			op )

Value:

  {  \
  TValue *v1 = vRB(i);  \
  TValue *v2 = KC(i);  \
  lua_Integer i1;  \
  lua_Integer i2 = ivalue(v2);  \
  if (tointegerns(v1, &i1)) {  \
    pc++; setivalue(s2v(ra), op(i1, i2));  \
  }}

Definition at line 965 of file lua-5.4.3/src/lvm.c.

#define op_bitwiseK(L,op) {  \
  TValue *v1 = vRB(i);  \
  TValue *v2 = KC(i);  \
  lua_Integer i1;  \
  lua_Integer i2 = ivalue(v2);  \
  if (tointegerns(v1, &i1)) {  \
    pc++; setivalue(s2v(ra), op(i1, i2));  \
  }}

Referenced by luaV_execute().

op_order

#define op_order	(		L,
			opi,
			opn,
			other )

Value:

        {  \
        int cond;  \
        TValue *rb = vRB(i);  \
        if (ttisinteger(s2v(ra)) && ttisinteger(rb)) {  \
          lua_Integer ia = ivalue(s2v(ra));  \
          lua_Integer ib = ivalue(rb);  \
          cond = opi(ia, ib);  \
        }  \
        else if (ttisnumber(s2v(ra)) && ttisnumber(rb))  \
          cond = opn(s2v(ra), rb);  \
        else  \
          Protect(cond = other(L, s2v(ra), rb));  \
        docondjump(); }

Definition at line 992 of file lua-5.4.3/src/lvm.c.

#define op_order(L,opi,opn,other) {  \
        int cond;  \
        TValue *rb = vRB(i);  \
        if (ttisinteger(s2v(ra)) && ttisinteger(rb)) {  \
          lua_Integer ia = ivalue(s2v(ra));  \
          lua_Integer ib = ivalue(rb);  \
          cond = opi(ia, ib);  \
        }  \
        else if (ttisnumber(s2v(ra)) && ttisnumber(rb))  \
          cond = opn(s2v(ra), rb);  \
        else  \
          Protect(cond = other(L, s2v(ra), rb));  \
        docondjump(); }

Referenced by luaV_execute().

op_orderI

#define op_orderI	(		L,
			opi,
			opf,
			inv,
			tm )

Value:

        {  \
        int cond;  \
        int im = GETARG_sB(i);  \
        if (ttisinteger(s2v(ra)))  \
          cond = opi(ivalue(s2v(ra)), im);  \
        else if (ttisfloat(s2v(ra))) {  \
          lua_Number fa = fltvalue(s2v(ra));  \
          lua_Number fim = cast_num(im);  \
          cond = opf(fa, fim);  \
        }  \
        else {  \
          int isf = GETARG_C(i);  \
          Protect(cond = luaT_callorderiTM(L, s2v(ra), im, inv, isf, tm));  \
        }  \
        docondjump(); }

Definition at line 1011 of file lua-5.4.3/src/lvm.c.

#define op_orderI(L,opi,opf,inv,tm) {  \
        int cond;  \
        int im = GETARG_sB(i);  \
        if (ttisinteger(s2v(ra)))  \
          cond = opi(ivalue(s2v(ra)), im);  \
        else if (ttisfloat(s2v(ra))) {  \
          lua_Number fa = fltvalue(s2v(ra));  \
          lua_Number fim = cast_num(im);  \
          cond = opf(fa, fim);  \
        }  \
        else {  \
          int isf = GETARG_C(i);  \
          Protect(cond = luaT_callorderiTM(L, s2v(ra), im, inv, isf, tm));  \
        }  \
        docondjump(); }

Referenced by luaV_execute().

Protect

#define Protect

(

exp

)

(savestate(L,ci), (exp), updatetrap(ci))

Definition at line 1096 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

ProtectNT

#define ProtectNT

(

exp

)

(savepc(L), (exp), updatetrap(ci))

Definition at line 1099 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

RA

#define RA

(

i

)

(base+GETARG_A(i))

Definition at line 1041 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

RB

#define RB

(

i

)

(base+GETARG_B(i))

Definition at line 1042 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

RC

#define RC

(

i

)

(base+GETARG_C(i))

Definition at line 1045 of file lua-5.4.3/src/lvm.c.

RKC

#define RKC

(

i

)

((TESTARG_k(i)) ? k + GETARG_C(i) : s2v(base + GETARG_C(i)))

Definition at line 1048 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

savepc

#define savepc

(

L

)

(ci->u.l.savedpc = pc)

Definition at line 1082 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

savestate

#define savestate	(		L,
			ci )   (savepc(L), L->top = ci->top)

Definition at line 1089 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

tostring

#define tostring	(		L,
			o )    (ttisstring(o) || (cvt2str(o) && (luaO_tostring(L, o), 1)))

Definition at line 618 of file lua-5.4.3/src/lvm.c.

#define tostring(L,o)  \
    (ttisstring(o) || (cvt2str(o) && (luaO_tostring(L, o), 1)))

Referenced by luaV_concat().

updatebase

#define updatebase

(

ci

)

(base = ci->func + 1)

Definition at line 1054 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

updatestack

#define updatestack

(

ci

)

{ if (l_unlikely(trap)) { updatebase(ci); ra = RA(i); } }

Definition at line 1057 of file lua-5.4.3/src/lvm.c.

#define updatestack(ci)  \
    { if (l_unlikely(trap)) { updatebase(ci); ra = RA(i); } }

Referenced by luaV_execute().

updatetrap

#define updatetrap

(

ci

)

(trap = ci->u.l.trap)

Definition at line 1052 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

vmbreak

#define vmbreak   break

Definition at line 1126 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

vmcase

#define vmcase

(

l

)

case l:

Definition at line 1125 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

vmdispatch

#define vmdispatch

(

o

)

switch(o)

Definition at line 1124 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

vmfetch

#define vmfetch

(

)

Value:

  { \
  if (l_unlikely(trap)) {  /* stack reallocation or hooks? */ \
    trap = luaG_traceexec(L, pc);  /* handle hooks */ \
    updatebase(ci);  /* correct stack */ \
  } \
  i = *(pc++); \
  ra = RA(i); /* WARNING: any stack reallocation invalidates 'ra' */ \
}

Definition at line 1115 of file lua-5.4.3/src/lvm.c.

#define vmfetch()   { \
  if (l_unlikely(trap)) {  /* stack reallocation or hooks? */ \
    trap = luaG_traceexec(L, pc);  /* handle hooks */ \
    updatebase(ci);  /* correct stack */ \
  } \
  i = *(pc++); \
  ra = RA(i); /* WARNING: any stack reallocation invalidates 'ra' */ \
}

Referenced by luaV_execute().

vRB

#define vRB

(

i

)

s2v(RB(i))

Definition at line 1043 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

vRC

#define vRC

(

i

)

s2v(RC(i))

Definition at line 1046 of file lua-5.4.3/src/lvm.c.

Referenced by luaV_execute().

Function Documentation

copy2buff()

static void copy2buff ( StkId top, int n, char * buff )

static

Definition at line 624 of file lua-5.4.3/src/lvm.c.

                                                     {
  size_t tl = 0;  /* size already copied */
  do {
    size_t l = vslen(s2v(top - n));  /* length of string being copied */
    memcpy(buff + tl, svalue(s2v(top - n)), l * sizeof(char));
    tl += l;
  } while (--n > 0);
}

References s2v, svalue, and vslen.

Referenced by luaV_concat().

floatforloop()

static int floatforloop ( StkId ra )

static

Definition at line 266 of file lua-5.4.3/src/lvm.c.

                                   {
  lua_Number step = fltvalue(s2v(ra + 2));
  lua_Number limit = fltvalue(s2v(ra + 1));
  lua_Number idx = fltvalue(s2v(ra));  /* internal index */
  idx = luai_numadd(L, idx, step);  /* increment index */
  if (luai_numlt(0, step) ? luai_numle(idx, limit)
                          : luai_numle(limit, idx)) {
    chgfltvalue(s2v(ra), idx);  /* update internal index */
    setfltvalue(s2v(ra + 3), idx);  /* and control variable */
    return 1;  /* jump back */
  }
  else
    return 0;  /* finish the loop */
}

References chgfltvalue, fltvalue, luai_numadd, luai_numle, luai_numlt, s2v, and setfltvalue.

Referenced by luaV_execute().

forlimit()

static int forlimit ( lua_State * L, lua_Integer init, const TValue * lim, lua_Integer * p, lua_Integer step )

static

Definition at line 176 of file lua-5.4.3/src/lvm.c.

                                                                     {
  if (!luaV_tointeger(lim, p, (step < 0 ? F2Iceil : F2Ifloor))) {
    /* not coercible to in integer */
    lua_Number flim;  /* try to convert to float */
    if (!tonumber(lim, &flim)) /* cannot convert to float? */
      luaG_forerror(L, lim, "limit");
    /* else 'flim' is a float out of integer bounds */
    if (luai_numlt(0, flim)) {  /* if it is positive, it is too large */
      if (step < 0) return 1;  /* initial value must be less than it */
      *p = LUA_MAXINTEGER;  /* truncate */
    }
    else {  /* it is less than min integer */
      if (step > 0) return 1;  /* initial value must be greater than it */
      *p = LUA_MININTEGER;  /* truncate */
    }
  }
  return (step > 0 ? init > *p : init < *p);  /* not to run? */
}

References F2Iceil, F2Ifloor, luaG_forerror(), luai_numlt, luaV_tointeger(), and tonumber.

Referenced by forprep().

forprep()

static int forprep ( lua_State * L, StkId ra )

static

Definition at line 206 of file lua-5.4.3/src/lvm.c.

                                            {
  TValue *pinit = s2v(ra);
  TValue *plimit = s2v(ra + 1);
  TValue *pstep = s2v(ra + 2);
  if (ttisinteger(pinit) && ttisinteger(pstep)) { /* integer loop? */
    lua_Integer init = ivalue(pinit);
    lua_Integer step = ivalue(pstep);
    lua_Integer limit;
    if (step == 0)
      luaG_runerror(L, "'for' step is zero");
    setivalue(s2v(ra + 3), init);  /* control variable */
    if (forlimit(L, init, plimit, &limit, step))
      return 1;  /* skip the loop */
    else {  /* prepare loop counter */
      lua_Unsigned count;
      if (step > 0) {  /* ascending loop? */
        count = l_castS2U(limit) - l_castS2U(init);
        if (step != 1)  /* avoid division in the too common case */
          count /= l_castS2U(step);
      }
      else {  /* step < 0; descending loop */
        count = l_castS2U(init) - l_castS2U(limit);
        /* 'step+1' avoids negating 'mininteger' */
        count /= l_castS2U(-(step + 1)) + 1u;
      }
      /* store the counter in place of the limit (which won't be
         needed anymore) */
      setivalue(plimit, l_castU2S(count));
    }
  }
  else {  /* try making all values floats */
    lua_Number init; lua_Number limit; lua_Number step;
    if (l_unlikely(!tonumber(plimit, &limit)))
      luaG_forerror(L, plimit, "limit");
    if (l_unlikely(!tonumber(pstep, &step)))
      luaG_forerror(L, pstep, "step");
    if (l_unlikely(!tonumber(pinit, &init)))
      luaG_forerror(L, pinit, "initial value");
    if (step == 0)
      luaG_runerror(L, "'for' step is zero");
    if (luai_numlt(0, step) ? luai_numlt(limit, init)
                            : luai_numlt(init, limit))
      return 1;  /* skip the loop */
    else {
      /* make sure internal values are all floats */
      setfltvalue(plimit, limit);
      setfltvalue(pstep, step);
      setfltvalue(s2v(ra), init);  /* internal index */
      setfltvalue(s2v(ra + 3), init);  /* control variable */
    }
  }
  return 0;
}

References forlimit(), ivalue, l_castS2U, l_castU2S, luaG_forerror(), luaG_runerror(), luai_numlt, s2v, setfltvalue, setivalue, tonumber, and ttisinteger.

Referenced by forbody(), and luaV_execute().

l_strcmp()

static int l_strcmp ( const TString * ls, const TString * rs )

static

Definition at line 375 of file lua-5.4.3/src/lvm.c.

                                                           {
  const char *l = getstr(ls);
  size_t ll = tsslen(ls);
  const char *r = getstr(rs);
  size_t lr = tsslen(rs);
  for (;;) {  /* for each segment */
    int temp = strcoll(l, r);
    if (temp != 0)  /* not equal? */
      return temp;  /* done */
    else {  /* strings are equal up to a '\0' */
      size_t len = strlen(l);  /* index of first '\0' in both strings */
      if (len == lr)  /* 'rs' is finished? */
        return (len == ll) ? 0 : 1;  /* check 'ls' */
      else if (len == ll)  /* 'ls' is finished? */
        return -1;  /* 'ls' is less than 'rs' ('rs' is not finished) */
      /* both strings longer than 'len'; go on comparing after the '\0' */
      len++;
      l += len; ll -= len; r += len; lr -= len;
    }
  }
}

References getstr, and tsslen.

Referenced by lessequalothers(), and lessthanothers().

l_strton()

static int l_strton ( const TValue * obj, TValue * result )

static

Definition at line 90 of file lua-5.4.3/src/lvm.c.

                                                        {
  lua_assert(obj != result);
  if (!cvt2num(obj))  /* is object not a string? */
    return 0;
  else
    return (luaO_str2num(svalue(obj), result) == vslen(obj) + 1);
}

References cvt2num, lua_assert, luaO_str2num(), svalue, and vslen.

Referenced by luaV_tointeger(), and luaV_tonumber_().

LEfloatint()

static int LEfloatint ( lua_Number f, lua_Integer i )

static

Definition at line 460 of file lua-5.4.3/src/lvm.c.

                                                    {
  if (l_intfitsf(i))
    return luai_numle(f, cast_num(i));  /* compare them as floats */
  else {  /* f <= i <=> ceil(f) <= i */
    lua_Integer fi;
    if (luaV_flttointeger(f, &fi, F2Iceil))  /* fi = ceil(f) */
      return fi <= i;   /* compare them as integers */
    else  /* 'f' is either greater or less than all integers */
      return f < 0;  /* less? */
  }
}

References cast_num, F2Iceil, l_intfitsf, luai_numle, and luaV_flttointeger().

Referenced by LEnum().

LEintfloat()

static int LEintfloat ( lua_Integer i, lua_Number f )

static

Definition at line 426 of file lua-5.4.3/src/lvm.c.

                                                    {
  if (l_intfitsf(i))
    return luai_numle(cast_num(i), f);  /* compare them as floats */
  else {  /* i <= f <=> i <= floor(f) */
    lua_Integer fi;
    if (luaV_flttointeger(f, &fi, F2Ifloor))  /* fi = floor(f) */
      return i <= fi;   /* compare them as integers */
    else  /* 'f' is either greater or less than all integers */
      return f > 0;  /* greater? */
  }
}

References cast_num, F2Ifloor, l_intfitsf, luai_numle, and luaV_flttointeger().

Referenced by LEnum().

LEnum()

static int LEnum ( const TValue * l, const TValue * r )

static

Definition at line 498 of file lua-5.4.3/src/lvm.c.

                                                    {
  lua_assert(ttisnumber(l) && ttisnumber(r));
  if (ttisinteger(l)) {
    lua_Integer li = ivalue(l);
    if (ttisinteger(r))
      return li <= ivalue(r);  /* both are integers */
    else  /* 'l' is int and 'r' is float */
      return LEintfloat(li, fltvalue(r));  /* l <= r ? */
  }
  else {
    lua_Number lf = fltvalue(l);  /* 'l' must be float */
    if (ttisfloat(r))
      return luai_numle(lf, fltvalue(r));  /* both are float */
    else  /* 'l' is float and 'r' is int */
      return LEfloatint(lf, ivalue(r));
  }
}

References fltvalue, ivalue, LEfloatint(), LEintfloat(), lua_assert, luai_numle, ttisfloat, ttisinteger, and ttisnumber.

Referenced by luaV_execute(), and luaV_lessequal().

lessequalothers()

static int lessequalothers ( lua_State * L, const TValue * l, const TValue * r )

static

Definition at line 542 of file lua-5.4.3/src/lvm.c.

                                                                            {
  lua_assert(!ttisnumber(l) || !ttisnumber(r));
  if (ttisstring(l) && ttisstring(r))  /* both are strings? */
    return l_strcmp(tsvalue(l), tsvalue(r)) <= 0;
  else
    return luaT_callorderTM(L, l, r, TM_LE);
}

References l_strcmp(), lua_assert, luaT_callorderTM(), TM_LE, tsvalue, ttisnumber, and ttisstring.

Referenced by luaV_execute(), and luaV_lessequal().

lessthanothers()

static int lessthanothers ( lua_State * L, const TValue * l, const TValue * r )

static

Definition at line 520 of file lua-5.4.3/src/lvm.c.

                                                                           {
  lua_assert(!ttisnumber(l) || !ttisnumber(r));
  if (ttisstring(l) && ttisstring(r))  /* both are strings? */
    return l_strcmp(tsvalue(l), tsvalue(r)) < 0;
  else
    return luaT_callorderTM(L, l, r, TM_LT);
}

References l_strcmp(), lua_assert, luaT_callorderTM(), TM_LT, tsvalue, ttisnumber, and ttisstring.

Referenced by luaV_execute(), and luaV_lessthan().

LTfloatint()

static int LTfloatint ( lua_Number f, lua_Integer i )

static

Definition at line 443 of file lua-5.4.3/src/lvm.c.

                                                    {
  if (l_intfitsf(i))
    return luai_numlt(f, cast_num(i));  /* compare them as floats */
  else {  /* f < i <=> floor(f) < i */
    lua_Integer fi;
    if (luaV_flttointeger(f, &fi, F2Ifloor))  /* fi = floor(f) */
      return fi < i;   /* compare them as integers */
    else  /* 'f' is either greater or less than all integers */
      return f < 0;  /* less? */
  }
}

References cast_num, F2Ifloor, l_intfitsf, luai_numlt, and luaV_flttointeger().

Referenced by LTnum().

LTintfloat()

static int LTintfloat ( lua_Integer i, lua_Number f )

static

Definition at line 409 of file lua-5.4.3/src/lvm.c.

                                                    {
  if (l_intfitsf(i))
    return luai_numlt(cast_num(i), f);  /* compare them as floats */
  else {  /* i < f <=> i < ceil(f) */
    lua_Integer fi;
    if (luaV_flttointeger(f, &fi, F2Iceil))  /* fi = ceil(f) */
      return i < fi;   /* compare them as integers */
    else  /* 'f' is either greater or less than all integers */
      return f > 0;  /* greater? */
  }
}

References cast_num, F2Iceil, l_intfitsf, luai_numlt, and luaV_flttointeger().

Referenced by LTnum().

LTnum()

static int LTnum ( const TValue * l, const TValue * r )

static

Definition at line 476 of file lua-5.4.3/src/lvm.c.

                                                    {
  lua_assert(ttisnumber(l) && ttisnumber(r));
  if (ttisinteger(l)) {
    lua_Integer li = ivalue(l);
    if (ttisinteger(r))
      return li < ivalue(r);  /* both are integers */
    else  /* 'l' is int and 'r' is float */
      return LTintfloat(li, fltvalue(r));  /* l < r ? */
  }
  else {
    lua_Number lf = fltvalue(l);  /* 'l' must be float */
    if (ttisfloat(r))
      return luai_numlt(lf, fltvalue(r));  /* both are float */
    else  /* 'l' is float and 'r' is int */
      return LTfloatint(lf, ivalue(r));
  }
}

References fltvalue, ivalue, LTfloatint(), LTintfloat(), lua_assert, luai_numlt, ttisfloat, ttisinteger, and ttisnumber.

Referenced by luaV_execute(), and luaV_lessthan().

luaV_concat()

void luaV_concat	(	lua_State *	L,
		int	total )

Definition at line 638 of file lua-5.4.3/src/lvm.c.

                                           {
  if (total == 1)
    return;  /* "all" values already concatenated */
  do {
    StkId top = L->top;
    int n = 2;  /* number of elements handled in this pass (at least 2) */
    if (!(ttisstring(s2v(top - 2)) || cvt2str(s2v(top - 2))) ||
        !tostring(L, s2v(top - 1)))
      luaT_tryconcatTM(L);
    else if (isemptystr(s2v(top - 1)))  /* second operand is empty? */
      cast_void(tostring(L, s2v(top - 2)));  /* result is first operand */
    else if (isemptystr(s2v(top - 2))) {  /* first operand is empty string? */
      setobjs2s(L, top - 2, top - 1);  /* result is second op. */
    }
    else {
      /* at least two non-empty string values; get as many as possible */
      size_t tl = vslen(s2v(top - 1));
      TString *ts;
      /* collect total length and number of strings */
      for (n = 1; n < total && tostring(L, s2v(top - n - 1)); n++) {
        size_t l = vslen(s2v(top - n - 1));
        if (l_unlikely(l >= (MAX_SIZE/sizeof(char)) - tl))
          luaG_runerror(L, "string length overflow");
        tl += l;
      }
      if (tl <= LUAI_MAXSHORTLEN) {  /* is result a short string? */
        char buff[LUAI_MAXSHORTLEN];
        copy2buff(top, n, buff);  /* copy strings to buffer */
        ts = luaS_newlstr(L, buff, tl);
      }
      else {  /* long string; copy strings directly to final result */
        ts = luaS_createlngstrobj(L, tl);
        copy2buff(top, n, getstr(ts));
      }
      setsvalue2s(L, top - n, ts);  /* create result */
    }
    total -= n-1;  /* got 'n' strings to create 1 new */
    L->top -= n-1;  /* popped 'n' strings and pushed one */
  } while (total > 1);  /* repeat until only 1 result left */
}

References cast_void, copy2buff(), cvt2str, getstr, isemptystr, luaG_runerror(), LUAI_MAXSHORTLEN, luaS_createlngstrobj(), luaS_newlstr(), luaT_tryconcatTM(), MAX_SIZE, s2v, setobjs2s, setsvalue2s, lua_State::top, tostring, ttisstring, and vslen.

Referenced by luaV_execute(), and luaV_finishOp().

luaV_equalobj()

int luaV_equalobj	(	lua_State *	L,
		const TValue *	t1,
		const TValue *	t2 )

Definition at line 565 of file lua-5.4.3/src/lvm.c.

                                                                     {
  const TValue *tm;
  if (ttypetag(t1) != ttypetag(t2)) {  /* not the same variant? */
    if (ttype(t1) != ttype(t2) || ttype(t1) != LUA_TNUMBER)
      return 0;  /* only numbers can be equal with different variants */
    else {  /* two numbers with different variants */
      /* One of them is an integer. If the other does not have an
         integer value, they cannot be equal; otherwise, compare their
         integer values. */
      lua_Integer i1, i2;
      return (luaV_tointegerns(t1, &i1, F2Ieq) &&
              luaV_tointegerns(t2, &i2, F2Ieq) &&
              i1 == i2);
    }
  }
  /* values have same type and same variant */
  switch (ttypetag(t1)) {
    case LUA_VNIL: case LUA_VFALSE: case LUA_VTRUE: return 1;
    case LUA_VNUMINT: return (ivalue(t1) == ivalue(t2));
    case LUA_VNUMFLT: return luai_numeq(fltvalue(t1), fltvalue(t2));
    case LUA_VLIGHTUSERDATA: return pvalue(t1) == pvalue(t2);
    case LUA_VLCF: return fvalue(t1) == fvalue(t2);
    case LUA_VSHRSTR: return eqshrstr(tsvalue(t1), tsvalue(t2));
    case LUA_VLNGSTR: return luaS_eqlngstr(tsvalue(t1), tsvalue(t2));
    case LUA_VUSERDATA: {
      if (uvalue(t1) == uvalue(t2)) return 1;
      else if (L == NULL) return 0;
      tm = fasttm(L, uvalue(t1)->metatable, TM_EQ);
      if (tm == NULL)
        tm = fasttm(L, uvalue(t2)->metatable, TM_EQ);
      break;  /* will try TM */
    }
    case LUA_VTABLE: {
      if (hvalue(t1) == hvalue(t2)) return 1;
      else if (L == NULL) return 0;
      tm = fasttm(L, hvalue(t1)->metatable, TM_EQ);
      if (tm == NULL)
        tm = fasttm(L, hvalue(t2)->metatable, TM_EQ);
      break;  /* will try TM */
    }
    default:
      return gcvalue(t1) == gcvalue(t2);
  }
  if (tm == NULL)  /* no TM? */
    return 0;  /* objects are different */
  else {
    luaT_callTMres(L, tm, t1, t2, L->top);  /* call TM */
    return !l_isfalse(s2v(L->top));
  }
}

References eqshrstr, F2Ieq, fasttm, fltvalue, fvalue, gcvalue, hvalue, ivalue, l_isfalse, LUA_TNUMBER, LUA_VFALSE, LUA_VLCF, LUA_VLIGHTUSERDATA, LUA_VLNGSTR, LUA_VNIL, LUA_VNUMFLT, LUA_VNUMINT, LUA_VSHRSTR, LUA_VTABLE, LUA_VTRUE, LUA_VUSERDATA, luai_numeq, luaS_eqlngstr(), luaT_callTMres(), luaV_tointegerns(), NULL, pvalue, s2v, TM_EQ, lua_State::top, tsvalue, ttype, ttypetag, and uvalue.

Referenced by luaV_execute().

luaV_execute()

void luaV_execute	(	lua_State *	L,
		CallInfo *	ci )

Definition at line 1129 of file lua-5.4.3/src/lvm.c.

                                               {
  LClosure *cl;
  TValue *k;
  StkId base;
  const Instruction *pc;
  int trap;
#if LUA_USE_JUMPTABLE
#include "ljumptab.h"
#endif
 startfunc:
  trap = L->hookmask;
 returning:  /* trap already set */
  cl = clLvalue(s2v(ci->func));
  k = cl->p->k;
  pc = ci->u.l.savedpc;
  if (l_unlikely(trap)) {
    if (pc == cl->p->code) {  /* first instruction (not resuming)? */
      if (cl->p->is_vararg)
        trap = 0;  /* hooks will start after VARARGPREP instruction */
      else  /* check 'call' hook */
        luaD_hookcall(L, ci);
    }
    ci->u.l.trap = 1;  /* assume trap is on, for now */
  }
  base = ci->func + 1;
  /* main loop of interpreter */
  for (;;) {
    Instruction i;  /* instruction being executed */
    StkId ra;  /* instruction's A register */
    vmfetch();
// low-level line tracing for debugging Lua
// printf("line: %d\n", luaG_getfuncline(cl->p, pcRel(pc, cl->p)));
    lua_assert(base == ci->func + 1);
    lua_assert(base <= L->top && L->top < L->stack_last);
    /* invalidate top for instructions not expecting it */
    lua_assert(isIT(i) || (cast_void(L->top = base), 1));
    vmdispatch (GET_OPCODE(i)) {
      vmcase(OP_MOVE) {
        setobjs2s(L, ra, RB(i));
        vmbreak;
      }
      vmcase(OP_LOADI) {
        lua_Integer b = GETARG_sBx(i);
        setivalue(s2v(ra), b);
        vmbreak;
      }
      vmcase(OP_LOADF) {
        int b = GETARG_sBx(i);
        setfltvalue(s2v(ra), cast_num(b));
        vmbreak;
      }
      vmcase(OP_LOADK) {
        TValue *rb = k + GETARG_Bx(i);
        setobj2s(L, ra, rb);
        vmbreak;
      }
      vmcase(OP_LOADKX) {
        TValue *rb;
        rb = k + GETARG_Ax(*pc); pc++;
        setobj2s(L, ra, rb);
        vmbreak;
      }
      vmcase(OP_LOADFALSE) {
        setbfvalue(s2v(ra));
        vmbreak;
      }
      vmcase(OP_LFALSESKIP) {
        setbfvalue(s2v(ra));
        pc++;  /* skip next instruction */
        vmbreak;
      }
      vmcase(OP_LOADTRUE) {
        setbtvalue(s2v(ra));
        vmbreak;
      }
      vmcase(OP_LOADNIL) {
        int b = GETARG_B(i);
        do {
          setnilvalue(s2v(ra++));
        } while (b--);
        vmbreak;
      }
      vmcase(OP_GETUPVAL) {
        int b = GETARG_B(i);
        setobj2s(L, ra, cl->upvals[b]->v);
        vmbreak;
      }
      vmcase(OP_SETUPVAL) {
        UpVal *uv = cl->upvals[GETARG_B(i)];
        setobj(L, uv->v, s2v(ra));
        luaC_barrier(L, uv, s2v(ra));
        vmbreak;
      }
      vmcase(OP_GETTABUP) {
        const TValue *slot;
        TValue *upval = cl->upvals[GETARG_B(i)]->v;
        TValue *rc = KC(i);
        TString *key = tsvalue(rc);  /* key must be a string */
        if (luaV_fastget(L, upval, key, slot, luaH_getshortstr)) {
          setobj2s(L, ra, slot);
        }
        else
          Protect(luaV_finishget(L, upval, rc, ra, slot));
        vmbreak;
      }
      vmcase(OP_GETTABLE) {
        const TValue *slot;
        TValue *rb = vRB(i);
        TValue *rc = vRC(i);
        lua_Unsigned n;
        if (ttisinteger(rc)  /* fast track for integers? */
            ? (cast_void(n = ivalue(rc)), luaV_fastgeti(L, rb, n, slot))
            : luaV_fastget(L, rb, rc, slot, luaH_get)) {
          setobj2s(L, ra, slot);
        }
        else
          Protect(luaV_finishget(L, rb, rc, ra, slot));
        vmbreak;
      }
      vmcase(OP_GETI) {
        const TValue *slot;
        TValue *rb = vRB(i);
        int c = GETARG_C(i);
        if (luaV_fastgeti(L, rb, c, slot)) {
          setobj2s(L, ra, slot);
        }
        else {
          TValue key;
          setivalue(&key, c);
          Protect(luaV_finishget(L, rb, &key, ra, slot));
        }
        vmbreak;
      }
      vmcase(OP_GETFIELD) {
        const TValue *slot;
        TValue *rb = vRB(i);
        TValue *rc = KC(i);
        TString *key = tsvalue(rc);  /* key must be a string */
        if (luaV_fastget(L, rb, key, slot, luaH_getshortstr)) {
          setobj2s(L, ra, slot);
        }
        else
          Protect(luaV_finishget(L, rb, rc, ra, slot));
        vmbreak;
      }
      vmcase(OP_SETTABUP) {
        const TValue *slot;
        TValue *upval = cl->upvals[GETARG_A(i)]->v;
        TValue *rb = KB(i);
        TValue *rc = RKC(i);
        TString *key = tsvalue(rb);  /* key must be a string */
        if (luaV_fastget(L, upval, key, slot, luaH_getshortstr)) {
          luaV_finishfastset(L, upval, slot, rc);
        }
        else
          Protect(luaV_finishset(L, upval, rb, rc, slot));
        vmbreak;
      }
      vmcase(OP_SETTABLE) {
        const TValue *slot;
        TValue *rb = vRB(i);  /* key (table is in 'ra') */
        TValue *rc = RKC(i);  /* value */
        lua_Unsigned n;
        if (ttisinteger(rb)  /* fast track for integers? */
            ? (cast_void(n = ivalue(rb)), luaV_fastgeti(L, s2v(ra), n, slot))
            : luaV_fastget(L, s2v(ra), rb, slot, luaH_get)) {
          luaV_finishfastset(L, s2v(ra), slot, rc);
        }
        else
          Protect(luaV_finishset(L, s2v(ra), rb, rc, slot));
        vmbreak;
      }
      vmcase(OP_SETI) {
        const TValue *slot;
        int c = GETARG_B(i);
        TValue *rc = RKC(i);
        if (luaV_fastgeti(L, s2v(ra), c, slot)) {
          luaV_finishfastset(L, s2v(ra), slot, rc);
        }
        else {
          TValue key;
          setivalue(&key, c);
          Protect(luaV_finishset(L, s2v(ra), &key, rc, slot));
        }
        vmbreak;
      }
      vmcase(OP_SETFIELD) {
        const TValue *slot;
        TValue *rb = KB(i);
        TValue *rc = RKC(i);
        TString *key = tsvalue(rb);  /* key must be a string */
        if (luaV_fastget(L, s2v(ra), key, slot, luaH_getshortstr)) {
          luaV_finishfastset(L, s2v(ra), slot, rc);
        }
        else
          Protect(luaV_finishset(L, s2v(ra), rb, rc, slot));
        vmbreak;
      }
      vmcase(OP_NEWTABLE) {
        int b = GETARG_B(i);  /* log2(hash size) + 1 */
        int c = GETARG_C(i);  /* array size */
        Table *t;
        if (b > 0)
          b = 1 << (b - 1);  /* size is 2^(b - 1) */
        lua_assert((!TESTARG_k(i)) == (GETARG_Ax(*pc) == 0));
        if (TESTARG_k(i))  /* non-zero extra argument? */
          c += GETARG_Ax(*pc) * (MAXARG_C + 1);  /* add it to size */
        pc++;  /* skip extra argument */
        L->top = ra + 1;  /* correct top in case of emergency GC */
        t = luaH_new(L);  /* memory allocation */
        sethvalue2s(L, ra, t);
        if (b != 0 || c != 0)
          luaH_resize(L, t, c, b);  /* idem */
        checkGC(L, ra + 1);
        vmbreak;
      }
      vmcase(OP_SELF) {
        const TValue *slot;
        TValue *rb = vRB(i);
        TValue *rc = RKC(i);
        TString *key = tsvalue(rc);  /* key must be a string */
        setobj2s(L, ra + 1, rb);
        if (luaV_fastget(L, rb, key, slot, luaH_getstr)) {
          setobj2s(L, ra, slot);
        }
        else
          Protect(luaV_finishget(L, rb, rc, ra, slot));
        vmbreak;
      }
      vmcase(OP_ADDI) {
        op_arithI(L, l_addi, luai_numadd);
        vmbreak;
      }
      vmcase(OP_ADDK) {
        op_arithK(L, l_addi, luai_numadd);
        vmbreak;
      }
      vmcase(OP_SUBK) {
        op_arithK(L, l_subi, luai_numsub);
        vmbreak;
      }
      vmcase(OP_MULK) {
        op_arithK(L, l_muli, luai_nummul);
        vmbreak;
      }
      vmcase(OP_MODK) {
        op_arithK(L, luaV_mod, luaV_modf);
        vmbreak;
      }
      vmcase(OP_POWK) {
        op_arithfK(L, luai_numpow);
        vmbreak;
      }
      vmcase(OP_DIVK) {
        op_arithfK(L, luai_numdiv);
        vmbreak;
      }
      vmcase(OP_IDIVK) {
        op_arithK(L, luaV_idiv, luai_numidiv);
        vmbreak;
      }
      vmcase(OP_BANDK) {
        op_bitwiseK(L, l_band);
        vmbreak;
      }
      vmcase(OP_BORK) {
        op_bitwiseK(L, l_bor);
        vmbreak;
      }
      vmcase(OP_BXORK) {
        op_bitwiseK(L, l_bxor);
        vmbreak;
      }
      vmcase(OP_SHRI) {
        TValue *rb = vRB(i);
        int ic = GETARG_sC(i);
        lua_Integer ib;
        if (tointegerns(rb, &ib)) {
          pc++; setivalue(s2v(ra), luaV_shiftl(ib, -ic));
        }
        vmbreak;
      }
      vmcase(OP_SHLI) {
        TValue *rb = vRB(i);
        int ic = GETARG_sC(i);
        lua_Integer ib;
        if (tointegerns(rb, &ib)) {
          pc++; setivalue(s2v(ra), luaV_shiftl(ic, ib));
        }
        vmbreak;
      }
      vmcase(OP_ADD) {
        op_arith(L, l_addi, luai_numadd);
        vmbreak;
      }
      vmcase(OP_SUB) {
        op_arith(L, l_subi, luai_numsub);
        vmbreak;
      }
      vmcase(OP_MUL) {
        op_arith(L, l_muli, luai_nummul);
        vmbreak;
      }
      vmcase(OP_MOD) {
        op_arith(L, luaV_mod, luaV_modf);
        vmbreak;
      }
      vmcase(OP_POW) {
        op_arithf(L, luai_numpow);
        vmbreak;
      }
      vmcase(OP_DIV) {  /* float division (always with floats) */
        op_arithf(L, luai_numdiv);
        vmbreak;
      }
      vmcase(OP_IDIV) {  /* floor division */
        op_arith(L, luaV_idiv, luai_numidiv);
        vmbreak;
      }
      vmcase(OP_BAND) {
        op_bitwise(L, l_band);
        vmbreak;
      }
      vmcase(OP_BOR) {
        op_bitwise(L, l_bor);
        vmbreak;
      }
      vmcase(OP_BXOR) {
        op_bitwise(L, l_bxor);
        vmbreak;
      }
      vmcase(OP_SHR) {
        op_bitwise(L, luaV_shiftr);
        vmbreak;
      }
      vmcase(OP_SHL) {
        op_bitwise(L, luaV_shiftl);
        vmbreak;
      }
      vmcase(OP_MMBIN) {
        Instruction pi = *(pc - 2);  /* original arith. expression */
        TValue *rb = vRB(i);
        TMS tm = (TMS)GETARG_C(i);
        StkId result = RA(pi);
        lua_assert(OP_ADD <= GET_OPCODE(pi) && GET_OPCODE(pi) <= OP_SHR);
        Protect(luaT_trybinTM(L, s2v(ra), rb, result, tm));
        vmbreak;
      }
      vmcase(OP_MMBINI) {
        Instruction pi = *(pc - 2);  /* original arith. expression */
        int imm = GETARG_sB(i);
        TMS tm = (TMS)GETARG_C(i);
        int flip = GETARG_k(i);
        StkId result = RA(pi);
        Protect(luaT_trybiniTM(L, s2v(ra), imm, flip, result, tm));
        vmbreak;
      }
      vmcase(OP_MMBINK) {
        Instruction pi = *(pc - 2);  /* original arith. expression */
        TValue *imm = KB(i);
        TMS tm = (TMS)GETARG_C(i);
        int flip = GETARG_k(i);
        StkId result = RA(pi);
        Protect(luaT_trybinassocTM(L, s2v(ra), imm, flip, result, tm));
        vmbreak;
      }
      vmcase(OP_UNM) {
        TValue *rb = vRB(i);
        lua_Number nb;
        if (ttisinteger(rb)) {
          lua_Integer ib = ivalue(rb);
          setivalue(s2v(ra), intop(-, 0, ib));
        }
        else if (tonumberns(rb, nb)) {
          setfltvalue(s2v(ra), luai_numunm(L, nb));
        }
        else
          Protect(luaT_trybinTM(L, rb, rb, ra, TM_UNM));
        vmbreak;
      }
      vmcase(OP_BNOT) {
        TValue *rb = vRB(i);
        lua_Integer ib;
        if (tointegerns(rb, &ib)) {
          setivalue(s2v(ra), intop(^, ~l_castS2U(0), ib));
        }
        else
          Protect(luaT_trybinTM(L, rb, rb, ra, TM_BNOT));
        vmbreak;
      }
      vmcase(OP_NOT) {
        TValue *rb = vRB(i);
        if (l_isfalse(rb))
          setbtvalue(s2v(ra));
        else
          setbfvalue(s2v(ra));
        vmbreak;
      }
      vmcase(OP_LEN) {
        Protect(luaV_objlen(L, ra, vRB(i)));
        vmbreak;
      }
      vmcase(OP_CONCAT) {
        int n = GETARG_B(i);  /* number of elements to concatenate */
        L->top = ra + n;  /* mark the end of concat operands */
        ProtectNT(luaV_concat(L, n));
        checkGC(L, L->top); /* 'luaV_concat' ensures correct top */
        vmbreak;
      }
      vmcase(OP_CLOSE) {
        Protect(luaF_close(L, ra, LUA_OK, 1));
        vmbreak;
      }
      vmcase(OP_TBC) {
        /* create new to-be-closed upvalue */
        halfProtect(luaF_newtbcupval(L, ra));
        vmbreak;
      }
      vmcase(OP_JMP) {
        dojump(ci, i, 0);
        vmbreak;
      }
      vmcase(OP_EQ) {
        int cond;
        TValue *rb = vRB(i);
        Protect(cond = luaV_equalobj(L, s2v(ra), rb));
        docondjump();
        vmbreak;
      }
      vmcase(OP_LT) {
        op_order(L, l_lti, LTnum, lessthanothers);
        vmbreak;
      }
      vmcase(OP_LE) {
        op_order(L, l_lei, LEnum, lessequalothers);
        vmbreak;
      }
      vmcase(OP_EQK) {
        TValue *rb = KB(i);
        /* basic types do not use '__eq'; we can use raw equality */
        int cond = luaV_rawequalobj(s2v(ra), rb);
        docondjump();
        vmbreak;
      }
      vmcase(OP_EQI) {
        int cond;
        int im = GETARG_sB(i);
        if (ttisinteger(s2v(ra)))
          cond = (ivalue(s2v(ra)) == im);
        else if (ttisfloat(s2v(ra)))
          cond = luai_numeq(fltvalue(s2v(ra)), cast_num(im));
        else
          cond = 0;  /* other types cannot be equal to a number */
        docondjump();
        vmbreak;
      }
      vmcase(OP_LTI) {
        op_orderI(L, l_lti, luai_numlt, 0, TM_LT);
        vmbreak;
      }
      vmcase(OP_LEI) {
        op_orderI(L, l_lei, luai_numle, 0, TM_LE);
        vmbreak;
      }
      vmcase(OP_GTI) {
        op_orderI(L, l_gti, luai_numgt, 1, TM_LT);
        vmbreak;
      }
      vmcase(OP_GEI) {
        op_orderI(L, l_gei, luai_numge, 1, TM_LE);
        vmbreak;
      }
      vmcase(OP_TEST) {
        int cond = !l_isfalse(s2v(ra));
        docondjump();
        vmbreak;
      }
      vmcase(OP_TESTSET) {
        TValue *rb = vRB(i);
        if (l_isfalse(rb) == GETARG_k(i))
          pc++;
        else {
          setobj2s(L, ra, rb);
          donextjump(ci);
        }
        vmbreak;
      }
      vmcase(OP_CALL) {
        CallInfo *newci;
        int b = GETARG_B(i);
        int nresults = GETARG_C(i) - 1;
        if (b != 0)  /* fixed number of arguments? */
          L->top = ra + b;  /* top signals number of arguments */
        /* else previous instruction set top */
        savepc(L);  /* in case of errors */
        if ((newci = luaD_precall(L, ra, nresults)) == NULL)
          updatetrap(ci);  /* C call; nothing else to be done */
        else {  /* Lua call: run function in this same C frame */
          ci = newci;
          ci->callstatus = 0;  /* call re-uses 'luaV_execute' */
          goto startfunc;
        }
        vmbreak;
      }
      vmcase(OP_TAILCALL) {
        int b = GETARG_B(i);  /* number of arguments + 1 (function) */
        int nparams1 = GETARG_C(i);
        /* delta is virtual 'func' - real 'func' (vararg functions) */
        int delta = (nparams1) ? ci->u.l.nextraargs + nparams1 : 0;
        if (b != 0)
          L->top = ra + b;
        else  /* previous instruction set top */
          b = cast_int(L->top - ra);
        savepc(ci);  /* several calls here can raise errors */
        if (TESTARG_k(i)) {
          luaF_closeupval(L, base);  /* close upvalues from current call */
          lua_assert(L->tbclist < base);  /* no pending tbc variables */
          lua_assert(base == ci->func + 1);
        }
        while (!ttisfunction(s2v(ra))) {  /* not a function? */
          luaD_tryfuncTM(L, ra);  /* try '__call' metamethod */
          b++;  /* there is now one extra argument */
          checkstackGCp(L, 1, ra);
        }
        if (!ttisLclosure(s2v(ra))) {  /* C function? */
          luaD_precall(L, ra, LUA_MULTRET);  /* call it */
          updatetrap(ci);
          updatestack(ci);  /* stack may have been relocated */
          ci->func -= delta;  /* restore 'func' (if vararg) */
          luaD_poscall(L, ci, cast_int(L->top - ra));  /* finish caller */
          updatetrap(ci);  /* 'luaD_poscall' can change hooks */
          goto ret;  /* caller returns after the tail call */
        }
        ci->func -= delta;  /* restore 'func' (if vararg) */
        luaD_pretailcall(L, ci, ra, b);  /* prepare call frame */
        goto startfunc;  /* execute the callee */
      }
      vmcase(OP_RETURN) {
        int n = GETARG_B(i) - 1;  /* number of results */
        int nparams1 = GETARG_C(i);
        if (n < 0)  /* not fixed? */
          n = cast_int(L->top - ra);  /* get what is available */
        savepc(ci);
        if (TESTARG_k(i)) {  /* may there be open upvalues? */
          if (L->top < ci->top)
            L->top = ci->top;
          luaF_close(L, base, CLOSEKTOP, 1);
          updatetrap(ci);
          updatestack(ci);
        }
        if (nparams1)  /* vararg function? */
          ci->func -= ci->u.l.nextraargs + nparams1;
        L->top = ra + n;  /* set call for 'luaD_poscall' */
        luaD_poscall(L, ci, n);
        updatetrap(ci);  /* 'luaD_poscall' can change hooks */
        goto ret;
      }
      vmcase(OP_RETURN0) {
        if (l_unlikely(L->hookmask)) {
          L->top = ra;
          savepc(ci);
          luaD_poscall(L, ci, 0);  /* no hurry... */
          trap = 1;
        }
        else {  /* do the 'poscall' here */
          int nres;
          L->ci = ci->previous;  /* back to caller */
          L->top = base - 1;
          for (nres = ci->nresults; l_unlikely(nres > 0); nres--)
            setnilvalue(s2v(L->top++));  /* all results are nil */
        }
        goto ret;
      }
      vmcase(OP_RETURN1) {
        if (l_unlikely(L->hookmask)) {
          L->top = ra + 1;
          savepc(ci);
          luaD_poscall(L, ci, 1);  /* no hurry... */
          trap = 1;
        }
        else {  /* do the 'poscall' here */
          int nres = ci->nresults;
          L->ci = ci->previous;  /* back to caller */
          if (nres == 0)
            L->top = base - 1;  /* asked for no results */
          else {
            setobjs2s(L, base - 1, ra);  /* at least this result */
            L->top = base;
            for (; l_unlikely(nres > 1); nres--)
              setnilvalue(s2v(L->top++));  /* complete missing results */
          }
        }
       ret:  /* return from a Lua function */
        if (ci->callstatus & CIST_FRESH)
          return;  /* end this frame */
        else {
          ci = ci->previous;
          goto returning;  /* continue running caller in this frame */
        }
      }
      vmcase(OP_FORLOOP) {
        if (ttisinteger(s2v(ra + 2))) {  /* integer loop? */
          lua_Unsigned count = l_castS2U(ivalue(s2v(ra + 1)));
          if (count > 0) {  /* still more iterations? */
            lua_Integer step = ivalue(s2v(ra + 2));
            lua_Integer idx = ivalue(s2v(ra));  /* internal index */
            chgivalue(s2v(ra + 1), count - 1);  /* update counter */
            idx = intop(+, idx, step);  /* add step to index */
            chgivalue(s2v(ra), idx);  /* update internal index */
            setivalue(s2v(ra + 3), idx);  /* and control variable */
            pc -= GETARG_Bx(i);  /* jump back */
          }
        }
        else if (floatforloop(ra))  /* float loop */
          pc -= GETARG_Bx(i);  /* jump back */
        updatetrap(ci);  /* allows a signal to break the loop */
        vmbreak;
      }
      vmcase(OP_FORPREP) {
        savestate(L, ci);  /* in case of errors */
        if (forprep(L, ra))
          pc += GETARG_Bx(i) + 1;  /* skip the loop */
        vmbreak;
      }
      vmcase(OP_TFORPREP) {
        /* create to-be-closed upvalue (if needed) */
        halfProtect(luaF_newtbcupval(L, ra + 3));
        pc += GETARG_Bx(i);
        i = *(pc++);  /* go to next instruction */
        lua_assert(GET_OPCODE(i) == OP_TFORCALL && ra == RA(i));
        goto l_tforcall;
      }
      vmcase(OP_TFORCALL) {
       l_tforcall:
        /* 'ra' has the iterator function, 'ra + 1' has the state,
           'ra + 2' has the control variable, and 'ra + 3' has the
           to-be-closed variable. The call will use the stack after
           these values (starting at 'ra + 4')
        */
        /* push function, state, and control variable */
        memcpy(ra + 4, ra, 3 * sizeof(*ra));
        L->top = ra + 4 + 3;
        ProtectNT(luaD_call(L, ra + 4, GETARG_C(i)));  /* do the call */
        updatestack(ci);  /* stack may have changed */
        i = *(pc++);  /* go to next instruction */
        lua_assert(GET_OPCODE(i) == OP_TFORLOOP && ra == RA(i));
        goto l_tforloop;
      }
      vmcase(OP_TFORLOOP) {
        l_tforloop:
        if (!ttisnil(s2v(ra + 4))) {  /* continue loop? */
          setobjs2s(L, ra + 2, ra + 4);  /* save control variable */
          pc -= GETARG_Bx(i);  /* jump back */
        }
        vmbreak;
      }
      vmcase(OP_SETLIST) {
        int n = GETARG_B(i);
        unsigned int last = GETARG_C(i);
        Table *h = hvalue(s2v(ra));
        if (n == 0)
          n = cast_int(L->top - ra) - 1;  /* get up to the top */
        else
          L->top = ci->top;  /* correct top in case of emergency GC */
        last += n;
        if (TESTARG_k(i)) {
          last += GETARG_Ax(*pc) * (MAXARG_C + 1);
          pc++;
        }
        if (last > luaH_realasize(h))  /* needs more space? */
          luaH_resizearray(L, h, last);  /* preallocate it at once */
        for (; n > 0; n--) {
          TValue *val = s2v(ra + n);
          setobj2t(L, &h->array[last - 1], val);
          last--;
          luaC_barrierback(L, obj2gco(h), val);
        }
        vmbreak;
      }
      vmcase(OP_CLOSURE) {
        Proto *p = cl->p->p[GETARG_Bx(i)];
        halfProtect(pushclosure(L, p, cl->upvals, base, ra));
        checkGC(L, ra + 1);
        vmbreak;
      }
      vmcase(OP_VARARG) {
        int n = GETARG_C(i) - 1;  /* required results */
        Protect(luaT_getvarargs(L, ci, ra, n));
        vmbreak;
      }
      vmcase(OP_VARARGPREP) {
        ProtectNT(luaT_adjustvarargs(L, GETARG_A(i), ci, cl->p));
        if (l_unlikely(trap)) {  /* previous "Protect" updated trap */
          luaD_hookcall(L, ci);
          L->oldpc = 1;  /* next opcode will be seen as a "new" line */
        }
        updatebase(ci);  /* function has new base after adjustment */
        vmbreak;
      }
      vmcase(OP_EXTRAARG) {
        lua_assert(0);
        vmbreak;
      }
    }
  }
}

References Table::array, CallInfo::callstatus, cast_int, cast_num, cast_void, checkGC, checkstackGCp, chgivalue, lua_State::ci, CIST_FRESH, clLvalue, CLOSEKTOP, Proto::code, cond(), docondjump, dojump, donextjump, floatforloop(), fltvalue, forprep(), CallInfo::func, GET_OPCODE, GETARG_A, GETARG_Ax, GETARG_B, GETARG_Bx, GETARG_C, GETARG_k, GETARG_sB, GETARG_sBx, GETARG_sC, halfProtect, lua_State::hookmask, hvalue, intop, Proto::is_vararg, isIT, ivalue, Proto::k, KB, KC, CallInfo::l, l_addi, l_band, l_bor, l_bxor, l_castS2U, l_gei, l_gti, l_isfalse, l_lei, l_lti, l_muli, l_subi, LEnum(), lessequalothers(), lessthanothers(), LTnum(), lua_assert, LUA_MULTRET, LUA_OK, luaC_barrier, luaC_barrierback, luaD_call(), luaD_hookcall(), luaD_poscall(), luaD_precall(), luaD_pretailcall(), luaD_tryfuncTM(), luaF_close(), luaF_closeupval(), luaF_newtbcupval(), luaH_get(), luaH_getshortstr(), luaH_getstr(), luaH_new(), luaH_realasize(), luaH_resize(), luaH_resizearray(), luai_numadd, luai_numdiv, luai_numeq, luai_numge, luai_numgt, luai_numidiv, luai_numle, luai_numlt, luai_nummul, luai_numpow, luai_numsub, luai_numunm, luaT_adjustvarargs(), luaT_getvarargs(), luaT_trybinassocTM(), luaT_trybiniTM(), luaT_trybinTM(), luaV_concat(), luaV_equalobj(), luaV_fastget, luaV_fastgeti, luaV_finishfastset, luaV_finishget(), luaV_finishset(), luaV_idiv(), luaV_mod(), luaV_modf(), luaV_objlen(), luaV_rawequalobj, luaV_shiftl(), luaV_shiftr, MAXARG_C, CallInfo::nextraargs, CallInfo::nresults, NULL, obj2gco, lua_State::oldpc, OP_ADD, OP_ADDI, OP_ADDK, op_arith, op_arithf, op_arithfK, op_arithI, op_arithK, OP_BAND, OP_BANDK, op_bitwise, op_bitwiseK, OP_BNOT, OP_BOR, OP_BORK, OP_BXOR, OP_BXORK, OP_CALL, OP_CLOSE, OP_CLOSURE, OP_CONCAT, OP_DIV, OP_DIVK, OP_EQ, OP_EQI, OP_EQK, OP_EXTRAARG, OP_FORLOOP, OP_FORPREP, OP_GEI, OP_GETFIELD, OP_GETI, OP_GETTABLE, OP_GETTABUP, OP_GETUPVAL, OP_GTI, OP_IDIV, OP_IDIVK, OP_JMP, OP_LE, OP_LEI, OP_LEN, OP_LFALSESKIP, OP_LOADF, OP_LOADFALSE, OP_LOADI, OP_LOADK, OP_LOADKX, OP_LOADNIL, OP_LOADTRUE, OP_LT, OP_LTI, OP_MMBIN, OP_MMBINI, OP_MMBINK, OP_MOD, OP_MODK, OP_MOVE, OP_MUL, OP_MULK, OP_NEWTABLE, OP_NOT, op_order, op_orderI, OP_POW, OP_POWK, OP_RETURN, OP_RETURN0, OP_RETURN1, OP_SELF, OP_SETFIELD, OP_SETI, OP_SETLIST, OP_SETTABLE, OP_SETTABUP, OP_SETUPVAL, OP_SHL, OP_SHLI, OP_SHR, OP_SHRI, OP_SUB, OP_SUBK, OP_TAILCALL, OP_TBC, OP_TEST, OP_TESTSET, OP_TFORCALL, OP_TFORLOOP, OP_TFORPREP, OP_UNM, OP_VARARG, OP_VARARGPREP, Proto::p, LClosure::p, CallInfo::previous, Protect, ProtectNT, pushclosure(), RA, RB, RKC, s2v, CallInfo::savedpc, savepc, savestate, setbfvalue, setbtvalue, setfltvalue, sethvalue2s, setivalue, setnilvalue, setobj, setobj2s, setobj2t, setobjs2s, lua_State::stack_last, lua_State::tbclist, TESTARG_k, TM_BNOT, TM_LE, TM_LT, TM_UNM, tointegerns, tonumberns, CallInfo::top, lua_State::top, CallInfo::trap, tsvalue, ttisfloat, ttisfunction, ttisinteger, ttisLclosure, ttisnil, CallInfo::u, updatebase, updatestack, updatetrap, LClosure::upvals, UpVal::v, vmbreak, vmcase, vmdispatch, vmfetch, vRB, and vRC.

luaV_finishget()

void luaV_finishget	(	lua_State *	L,
		const TValue *	t,
		TValue *	key,
		StkId	val,
		const TValue *	slot )

Definition at line 287 of file lua-5.4.3/src/lvm.c.

                                          {
  int loop;  /* counter to avoid infinite loops */
  const TValue *tm;  /* metamethod */
  for (loop = 0; loop < MAXTAGLOOP; loop++) {
    if (slot == NULL) {  /* 't' is not a table? */
      lua_assert(!ttistable(t));
      tm = luaT_gettmbyobj(L, t, TM_INDEX);
      if (l_unlikely(notm(tm)))
        luaG_typeerror(L, t, "index");  /* no metamethod */
      /* else will try the metamethod */
    }
    else {  /* 't' is a table */
      lua_assert(isempty(slot));
      tm = fasttm(L, hvalue(t)->metatable, TM_INDEX);  /* table's metamethod */
      if (tm == NULL) {  /* no metamethod? */
        setnilvalue(s2v(val));  /* result is nil */
        return;
      }
      /* else will try the metamethod */
    }
    if (ttisfunction(tm)) {  /* is metamethod a function? */
      luaT_callTMres(L, tm, t, key, val);  /* call it */
      return;
    }
    t = tm;  /* else try to access 'tm[key]' */
    if (luaV_fastget(L, t, key, slot, luaH_get)) {  /* fast track? */
      setobj2s(L, val, slot);  /* done */
      return;
    }
    /* else repeat (tail call 'luaV_finishget') */
  }
  luaG_runerror(L, "'__index' chain too long; possible loop");
}

References fasttm, hvalue, isempty, lua_assert, luaG_runerror(), luaG_typeerror(), luaH_get(), luaT_callTMres(), luaT_gettmbyobj(), luaV_fastget, MAXTAGLOOP, notm, NULL, s2v, setnilvalue, setobj2s, TM_INDEX, ttisfunction, and ttistable.

Referenced by luaV_execute().

luaV_finishOp()

void luaV_finishOp

(

lua_State *

L

)

Definition at line 808 of file lua-5.4.3/src/lvm.c.

                                  {
  CallInfo *ci = L->ci;
  StkId base = ci->func + 1;
  Instruction inst = *(ci->u.l.savedpc - 1);  /* interrupted instruction */
  OpCode op = GET_OPCODE(inst);
  switch (op) {  /* finish its execution */
    case OP_MMBIN: case OP_MMBINI: case OP_MMBINK: {
      setobjs2s(L, base + GETARG_A(*(ci->u.l.savedpc - 2)), --L->top);
      break;
    }
    case OP_UNM: case OP_BNOT: case OP_LEN:
    case OP_GETTABUP: case OP_GETTABLE: case OP_GETI:
    case OP_GETFIELD: case OP_SELF: {
      setobjs2s(L, base + GETARG_A(inst), --L->top);
      break;
    }
    case OP_LT: case OP_LE:
    case OP_LTI: case OP_LEI:
    case OP_GTI: case OP_GEI:
    case OP_EQ: {  /* note that 'OP_EQI'/'OP_EQK' cannot yield */
      int res = !l_isfalse(s2v(L->top - 1));
      L->top--;
#if defined(LUA_COMPAT_LT_LE)
      if (ci->callstatus & CIST_LEQ) {  /* "<=" using "<" instead? */
        ci->callstatus ^= CIST_LEQ;  /* clear mark */
        res = !res;  /* negate result */
      }
#endif
      lua_assert(GET_OPCODE(*ci->u.l.savedpc) == OP_JMP);
      if (res != GETARG_k(inst))  /* condition failed? */
        ci->u.l.savedpc++;  /* skip jump instruction */
      break;
    }
    case OP_CONCAT: {
      StkId top = L->top - 1;  /* top when 'luaT_tryconcatTM' was called */
      int a = GETARG_A(inst);      /* first element to concatenate */
      int total = cast_int(top - 1 - (base + a));  /* yet to concatenate */
      setobjs2s(L, top - 2, top);  /* put TM result in proper position */
      L->top = top - 1;  /* top is one after last element (at top-2) */
      luaV_concat(L, total);  /* concat them (may yield again) */
      break;
    }
    case OP_CLOSE:  case OP_RETURN: {  /* yielded closing variables */
      ci->u.l.savedpc--;  /* repeat instruction to close other vars. */
      break;
    }
    default: {
      /* only these other opcodes can yield */
      lua_assert(op == OP_TFORCALL || op == OP_CALL ||
           op == OP_TAILCALL || op == OP_SETTABUP || op == OP_SETTABLE ||
           op == OP_SETI || op == OP_SETFIELD);
      break;
    }
  }
}

References CallInfo::callstatus, cast_int, lua_State::ci, CIST_LEQ, CallInfo::func, GET_OPCODE, GETARG_A, GETARG_k, CallInfo::l, l_isfalse, lua_assert, luaV_concat(), OP_BNOT, OP_CALL, OP_CLOSE, OP_CONCAT, OP_EQ, OP_GEI, OP_GETFIELD, OP_GETI, OP_GETTABLE, OP_GETTABUP, OP_GTI, OP_JMP, OP_LE, OP_LEI, OP_LEN, OP_LT, OP_LTI, OP_MMBIN, OP_MMBINI, OP_MMBINK, OP_RETURN, OP_SELF, OP_SETFIELD, OP_SETI, OP_SETTABLE, OP_SETTABUP, OP_TAILCALL, OP_TFORCALL, OP_UNM, s2v, CallInfo::savedpc, setobjs2s, lua_State::top, and CallInfo::u.

luaV_finishset()

void luaV_finishset	(	lua_State *	L,
		const TValue *	t,
		TValue *	key,
		TValue *	val,
		const TValue *	slot )

Definition at line 330 of file lua-5.4.3/src/lvm.c.

                                                      {
  int loop;  /* counter to avoid infinite loops */
  for (loop = 0; loop < MAXTAGLOOP; loop++) {
    const TValue *tm;  /* '__newindex' metamethod */
    if (slot != NULL) {  /* is 't' a table? */
      Table *h = hvalue(t);  /* save 't' table */
      lua_assert(isempty(slot));  /* slot must be empty */
      tm = fasttm(L, h->metatable, TM_NEWINDEX);  /* get metamethod */
      if (tm == NULL) {  /* no metamethod? */
        luaH_finishset(L, h, key, slot, val);  /* set new value */
        invalidateTMcache(h);
        luaC_barrierback(L, obj2gco(h), val);
        return;
      }
      /* else will try the metamethod */
    }
    else {  /* not a table; check metamethod */
      tm = luaT_gettmbyobj(L, t, TM_NEWINDEX);
      if (l_unlikely(notm(tm)))
        luaG_typeerror(L, t, "index");
    }
    /* try the metamethod */
    if (ttisfunction(tm)) {
      luaT_callTM(L, tm, t, key, val);
      return;
    }
    t = tm;  /* else repeat assignment over 'tm' */
    if (luaV_fastget(L, t, key, slot, luaH_get)) {
      luaV_finishfastset(L, t, slot, val);
      return;  /* done */
    }
    /* else 'return luaV_finishset(L, t, key, val, slot)' (loop) */
  }
  luaG_runerror(L, "'__newindex' chain too long; possible loop");
}

References fasttm, hvalue, invalidateTMcache, isempty, lua_assert, luaC_barrierback, luaG_runerror(), luaG_typeerror(), luaH_finishset(), luaH_get(), luaT_callTM(), luaT_gettmbyobj(), luaV_fastget, luaV_finishfastset, MAXTAGLOOP, Table::metatable, notm, NULL, obj2gco, TM_NEWINDEX, and ttisfunction.

Referenced by luaV_execute().

luaV_flttointeger()

int luaV_flttointeger	(	lua_Number	n,
		lua_Integer *	p,
		F2Imod	mode )

Definition at line 121 of file lua-5.4.3/src/lvm.c.

                                                                  {
  lua_Number f = l_floor(n);
  if (n != f) {  /* not an integral value? */
    if (mode == F2Ieq) return 0;  /* fails if mode demands integral value */
    else if (mode == F2Iceil)  /* needs ceil? */
      f += 1;  /* convert floor to ceil (remember: n != f) */
  }
  return lua_numbertointeger(f, p);
}

References F2Iceil, F2Ieq, l_floor, and lua_numbertointeger.

Referenced by isSCnumber(), LEfloatint(), LEintfloat(), LTfloatint(), LTintfloat(), luaH_get(), luaH_newkey(), luaK_float(), and luaV_tointegerns().

luaV_idiv()

lua_Integer luaV_idiv	(	lua_State *	L,
		lua_Integer	m,
		lua_Integer	n )

Definition at line 718 of file lua-5.4.3/src/lvm.c.

                                                                   {
  if (l_unlikely(l_castS2U(n) + 1u <= 1u)) {  /* special cases: -1 or 0 */
    if (n == 0)
      luaG_runerror(L, "attempt to divide by zero");
    return intop(-, 0, m);   /* n==-1; avoid overflow with 0x80000...//-1 */
  }
  else {
    lua_Integer q = m / n;  /* perform C division */
    if ((m ^ n) < 0 && m % n != 0)  /* 'm/n' would be negative non-integer? */
      q -= 1;  /* correct result for different rounding */
    return q;
  }
}

References intop, l_castS2U, and luaG_runerror().

Referenced by intarith(), and luaV_execute().

luaV_lessequal()

int luaV_lessequal	(	lua_State *	L,
		const TValue *	l,
		const TValue *	r )

Definition at line 554 of file lua-5.4.3/src/lvm.c.

                                                                    {
  if (ttisnumber(l) && ttisnumber(r))  /* both operands are numbers? */
    return LEnum(l, r);
  else return lessequalothers(L, l, r);
}

References LEnum(), lessequalothers(), and ttisnumber.

luaV_lessthan()

int luaV_lessthan	(	lua_State *	L,
		const TValue *	l,
		const TValue *	r )

Definition at line 532 of file lua-5.4.3/src/lvm.c.

                                                                   {
  if (ttisnumber(l) && ttisnumber(r))  /* both operands are numbers? */
    return LTnum(l, r);
  else return lessthanothers(L, l, r);
}

References lessthanothers(), LTnum(), and ttisnumber.

luaV_mod()

lua_Integer luaV_mod	(	lua_State *	L,
		lua_Integer	m,
		lua_Integer	n )

Definition at line 738 of file lua-5.4.3/src/lvm.c.

                                                                  {
  if (l_unlikely(l_castS2U(n) + 1u <= 1u)) {  /* special cases: -1 or 0 */
    if (n == 0)
      luaG_runerror(L, "attempt to perform 'n%%0'");
    return 0;   /* m % -1 == 0; avoid overflow with 0x80000...%-1 */
  }
  else {
    lua_Integer r = m % n;
    if (r != 0 && (r ^ n) < 0)  /* 'm/n' would be non-integer negative? */
      r += n;  /* correct result for different rounding */
    return r;
  }
}

References l_castS2U, and luaG_runerror().

Referenced by luaV_execute().

luaV_modf()

lua_Number luaV_modf	(	lua_State *	L,
		lua_Number	m,
		lua_Number	n )

Definition at line 756 of file lua-5.4.3/src/lvm.c.

                                                                {
  lua_Number r;
  luai_nummod(L, m, n, r);
  return r;
}

References luai_nummod.

Referenced by luaV_execute(), and numarith().

luaV_objlen()

void luaV_objlen	(	lua_State *	L,
		StkId	ra,
		const TValue *	rb )

Definition at line 683 of file lua-5.4.3/src/lvm.c.

                                                            {
  const TValue *tm;
  switch (ttypetag(rb)) {
    case LUA_VTABLE: {
      Table *h = hvalue(rb);
      tm = fasttm(L, h->metatable, TM_LEN);
      if (tm) break;  /* metamethod? break switch to call it */
      setivalue(s2v(ra), luaH_getn(h));  /* else primitive len */
      return;
    }
    case LUA_VSHRSTR: {
      setivalue(s2v(ra), tsvalue(rb)->shrlen);
      return;
    }
    case LUA_VLNGSTR: {
      setivalue(s2v(ra), tsvalue(rb)->u.lnglen);
      return;
    }
    default: {  /* try metamethod */
      tm = luaT_gettmbyobj(L, rb, TM_LEN);
      if (l_unlikely(notm(tm)))  /* no metamethod? */
        luaG_typeerror(L, rb, "get length of");
      break;
    }
  }
  luaT_callTMres(L, tm, rb, rb, ra);
}

References fasttm, hvalue, LUA_VLNGSTR, LUA_VSHRSTR, LUA_VTABLE, luaG_typeerror(), luaH_getn(), luaT_callTMres(), luaT_gettmbyobj(), Table::metatable, notm, s2v, setivalue, TM_LEN, tsvalue, and ttypetag.

Referenced by luaV_execute().

luaV_shiftl()

lua_Integer luaV_shiftl	(	lua_Integer	x,
		lua_Integer	y )

Definition at line 771 of file lua-5.4.3/src/lvm.c.

                                                       {
  if (y < 0) {  /* shift right? */
    if (y <= -NBITS) return 0;
    else return intop(>>, x, -y);
  }
  else {  /* shift left */
    if (y >= NBITS) return 0;
    else return intop(<<, x, y);
  }
}

References intop, and NBITS.

Referenced by luaV_execute().

luaV_tointeger()

int luaV_tointeger	(	const TValue *	obj,
		lua_Integer *	p,
		F2Imod	mode )

Definition at line 152 of file lua-5.4.3/src/lvm.c.

                                                                    {
  TValue v;
  if (l_strton(obj, &v))  /* does 'obj' point to a numerical string? */
    obj = &v;  /* change it to point to its corresponding number */
  return luaV_tointegerns(obj, p, mode);
}

References l_strton(), and luaV_tointegerns().

Referenced by forlimit().

luaV_tointegerns()

int luaV_tointegerns	(	const TValue *	obj,
		lua_Integer *	p,
		F2Imod	mode )

Definition at line 137 of file lua-5.4.3/src/lvm.c.

                                                                      {
  if (ttisfloat(obj))
    return luaV_flttointeger(fltvalue(obj), p, mode);
  else if (ttisinteger(obj)) {
    *p = ivalue(obj);
    return 1;
  }
  else
    return 0;
}

References fltvalue, ivalue, luaV_flttointeger(), ttisfloat, and ttisinteger.

Referenced by luaG_tointerror(), luaV_equalobj(), luaV_tointeger(), and validop().

luaV_tonumber_()

int luaV_tonumber_	(	const TValue *	obj,
		lua_Number *	n )

Definition at line 103 of file lua-5.4.3/src/lvm.c.

                                                      {
  TValue v;
  if (ttisinteger(obj)) {
    *n = cast_num(ivalue(obj));
    return 1;
  }
  else if (l_strton(obj, &v)) {  /* string coercible to number? */
    *n = nvalue(&v);  /* convert result of 'luaO_str2num' to a float */
    return 1;
  }
  else
    return 0;  /* conversion failed */
}

References cast_num, ivalue, l_strton(), nvalue, and ttisinteger.

pushclosure()

static void pushclosure ( lua_State * L, Proto * p, UpVal ** encup, StkId base, StkId ra )

static

Definition at line 787 of file lua-5.4.3/src/lvm.c.

                                   {
  int nup = p->sizeupvalues;
  Upvaldesc *uv = p->upvalues;
  int i;
  LClosure *ncl = luaF_newLclosure(L, nup);
  ncl->p = p;
  setclLvalue2s(L, ra, ncl);  /* anchor new closure in stack */
  for (i = 0; i < nup; i++) {  /* fill in its upvalues */
    if (uv[i].instack)  /* upvalue refers to local variable? */
      ncl->upvals[i] = luaF_findupval(L, base + uv[i].idx);
    else  /* get upvalue from enclosing function */
      ncl->upvals[i] = encup[uv[i].idx];
    luaC_objbarrier(L, ncl, ncl->upvals[i]);
  }
}

References Upvaldesc::idx, luaC_objbarrier, luaF_findupval(), luaF_newLclosure(), LClosure::p, setclLvalue2s, Proto::sizeupvalues, LClosure::upvals, and Proto::upvalues.

Referenced by luaV_execute().