lvm.h File Reference

#include "ldo.h"
#include "lobject.h"
#include "ltm.h"

Go to the source code of this file.

Macros
#define	cvt2str(o)   ttisnumber(o)
#define	cvt2num(o)   ttisstring(o)
#define	LUA_FLOORN2I   F2Ieq
#define	tonumber(o, n)    (ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n))
#define	tonumberns(o, n)
#define	tointeger(o, i)
#define	tointegerns(o, i)
#define	intop(op, v1, v2)   l_castU2S(l_castS2U(v1) op l_castS2U(v2))
#define	luaV_rawequalobj(t1, t2)   luaV_equalobj(NULL,t1,t2)
#define	luaV_fastget(L, t, k, slot, f)
#define	luaV_fastgeti(L, t, k, slot)
#define	luaV_finishfastset(L, t, slot, v)

Enumerations
enum	F2Imod { F2Ieq , F2Ifloor , F2Iceil }

Functions
LUAI_FUNC int	luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2)
LUAI_FUNC int	luaV_lessthan (lua_State *L, const TValue *l, const TValue *r)
LUAI_FUNC int	luaV_lessequal (lua_State *L, const TValue *l, const TValue *r)
LUAI_FUNC int	luaV_tonumber_ (const TValue *obj, lua_Number *n)
LUAI_FUNC int	luaV_tointeger (const TValue *obj, lua_Integer *p, F2Imod mode)
LUAI_FUNC int	luaV_tointegerns (const TValue *obj, lua_Integer *p, F2Imod mode)
LUAI_FUNC int	luaV_flttointeger (lua_Number n, lua_Integer *p, F2Imod mode)
LUAI_FUNC void	luaV_finishget (lua_State *L, const TValue *t, TValue *key, StkId val, const TValue *slot)
LUAI_FUNC void	luaV_finishset (lua_State *L, const TValue *t, TValue *key, TValue *val, const TValue *slot)
LUAI_FUNC void	luaV_finishOp (lua_State *L)
LUAI_FUNC void	luaV_execute (lua_State *L, CallInfo *ci)
LUAI_FUNC void	luaV_concat (lua_State *L, int total)
LUAI_FUNC lua_Integer	luaV_idiv (lua_State *L, lua_Integer x, lua_Integer y)
LUAI_FUNC lua_Integer	luaV_mod (lua_State *L, lua_Integer x, lua_Integer y)
LUAI_FUNC lua_Number	luaV_modf (lua_State *L, lua_Number x, lua_Number y)
LUAI_FUNC lua_Integer	luaV_shiftl (lua_Integer x, lua_Integer y)
LUAI_FUNC void	luaV_objlen (lua_State *L, StkId ra, const TValue *rb)

Macro Definition Documentation

cvt2num

#define cvt2num

(

o

)

ttisstring(o)

Definition at line 24 of file lua-5.4.3/src/lvm.h.

cvt2str

#define cvt2str

(

o

)

ttisnumber(o)

Definition at line 17 of file lua-5.4.3/src/lvm.h.

intop

#define intop	(		op,
			v1,
			v2 )   l_castU2S(l_castS2U(v1) op l_castS2U(v2))

Definition at line 73 of file lua-5.4.3/src/lvm.h.

LUA_FLOORN2I

#define LUA_FLOORN2I   F2Ieq

Definition at line 36 of file lua-5.4.3/src/lvm.h.

luaV_fastget

#define luaV_fastget	(		L,
			t,
			k,
			slot,
			f )

Value:

  (!ttistable(t)  \
   ? (slot = NULL, 0)  /* not a table; 'slot' is NULL and result is 0 */  \
   : (slot = f(hvalue(t), k),  /* else, do raw access */  \
      !isempty(slot)))  /* result not empty? */

Definition at line 85 of file lua-5.4.3/src/lvm.h.

#define luaV_fastget(L,t,k,slot,f) \
  (!ttistable(t)  \
   ? (slot = NULL, 0)  /* not a table; 'slot' is NULL and result is 0 */  \
   : (slot = f(hvalue(t), k),  /* else, do raw access */  \
      !isempty(slot)))  /* result not empty? */

luaV_fastgeti

#define luaV_fastgeti	(		L,
			t,
			k,
			slot )

Value:

  (!ttistable(t)  \
   ? (slot = NULL, 0)  /* not a table; 'slot' is NULL and result is 0 */  \
   : (slot = (l_castS2U(k) - 1u < hvalue(t)->alimit) \
              ? &hvalue(t)->array[k - 1] : luaH_getint(hvalue(t), k), \
      !isempty(slot)))  /* result not empty? */

Definition at line 96 of file lua-5.4.3/src/lvm.h.

#define luaV_fastgeti(L,t,k,slot) \
  (!ttistable(t)  \
   ? (slot = NULL, 0)  /* not a table; 'slot' is NULL and result is 0 */  \
   : (slot = (l_castS2U(k) - 1u < hvalue(t)->alimit) \
              ? &hvalue(t)->array[k - 1] : luaH_getint(hvalue(t), k), \
      !isempty(slot)))  /* result not empty? */

Referenced by lua_geti(), lua_seti(), and luaV_execute().

luaV_finishfastset

#define luaV_finishfastset	(		L,
			t,
			slot,
			v )

Value:

    { setobj2t(L, cast(TValue *,slot), v); \
      luaC_barrierback(L, gcvalue(t), v); }

Definition at line 108 of file lua-5.4.3/src/lvm.h.

#define luaV_finishfastset(L,t,slot,v) \
    { setobj2t(L, cast(TValue *,slot), v); \
      luaC_barrierback(L, gcvalue(t), v); }

Referenced by auxsetstr(), lua_seti(), lua_settable(), luaV_execute(), and luaV_finishset().

luaV_rawequalobj

#define luaV_rawequalobj	(		t1,
			t2 )   luaV_equalobj(NULL,t1,t2)

Definition at line 75 of file lua-5.4.3/src/lvm.h.

tointeger

#define tointeger	(		o,
			i )

Value:

  (l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \
                          : luaV_tointeger(o,i,LUA_FLOORN2I))

Definition at line 62 of file lua-5.4.3/src/lvm.h.

#define tointeger(o,i) \
  (l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \
                          : luaV_tointeger(o,i,LUA_FLOORN2I))

tointegerns

#define tointegerns	(		o,
			i )

Value:

  (l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \
                          : luaV_tointegerns(o,i,LUA_FLOORN2I))

Definition at line 68 of file lua-5.4.3/src/lvm.h.

#define tointegerns(o,i) \
  (l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \
                          : luaV_tointegerns(o,i,LUA_FLOORN2I))

Referenced by luaO_rawarith(), and luaV_execute().

tonumber

#define tonumber	(		o,
			n )    (ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n))

Definition at line 51 of file lua-5.4.3/src/lvm.h.

#define tonumber(o,n) \
    (ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n))

tonumberns

#define tonumberns	(		o,
			n )

Value:

    (ttisfloat(o) ? ((n) = fltvalue(o), 1) : \
    (ttisinteger(o) ? ((n) = cast_num(ivalue(o)), 1) : 0))

Definition at line 56 of file lua-5.4.3/src/lvm.h.

#define tonumberns(o,n) \
    (ttisfloat(o) ? ((n) = fltvalue(o), 1) : \
    (ttisinteger(o) ? ((n) = cast_num(ivalue(o)), 1) : 0))

Referenced by luaO_rawarith(), and luaV_execute().

Enumeration Type Documentation

F2Imod

enum F2Imod

Enumerator
F2Ieq
F2Ifloor
F2Iceil

Definition at line 43 of file lua-5.4.3/src/lvm.h.

             {
  F2Ieq,     /* no rounding; accepts only integral values */
  F2Ifloor,  /* takes the floor of the number */
  F2Iceil    /* takes the ceil of the number */
} F2Imod;

Function Documentation

luaV_concat()

LUAI_FUNC void luaV_concat	(	lua_State *	L,
		int	total )

Definition at line 293 of file lua-5.2.4/src/lvm.c.

                                           {
  lua_assert(total >= 2);
  do {
    StkId top = L->top;
    int n = 2;  /* number of elements handled in this pass (at least 2) */
    if (!(ttisstring(top-2) || ttisnumber(top-2)) || !tostring(L, top-1)) {
      if (!call_binTM(L, top-2, top-1, top-2, TM_CONCAT))
        luaG_concaterror(L, top-2, top-1);
    }
    else if (tsvalue(top-1)->len == 0)  /* second operand is empty? */
      (void)tostring(L, top - 2);  /* result is first operand */
    else if (ttisstring(top-2) && tsvalue(top-2)->len == 0) {
      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 = tsvalue(top-1)->len;
      char *buffer;
      int i;
      /* collect total length */
      for (i = 1; i < total && tostring(L, top-i-1); i++) {
        size_t l = tsvalue(top-i-1)->len;
        if (l >= (MAX_SIZET/sizeof(char)) - tl)
          luaG_runerror(L, "string length overflow");
        tl += l;
      }
      buffer = luaZ_openspace(L, &G(L)->buff, tl);
      tl = 0;
      n = i;
      do {  /* concat all strings */
        size_t l = tsvalue(top-i)->len;
        memcpy(buffer+tl, svalue(top-i), l * sizeof(char));
        tl += l;
      } while (--i > 0);
      setsvalue2s(L, top-n, luaS_newlstr(L, buffer, tl));
    }
    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 call_binTM(), cast_void, copy2buff(), copy2buff(), cvt2str, G, getstr, isemptystr, lua_assert, luaG_concaterror(), luaG_runerror(), LUAI_MAXSHORTLEN, luaS_createlngstrobj(), luaS_newlstr(), luaT_trybinTM(), luaT_tryconcatTM(), luaZ_openspace(), MAX_SIZE, MAX_SIZET, s2v, setobjs2s, setsvalue2s, svalue, TM_CONCAT, lua_State::top, tostring, tsvalue, ttisnumber, ttisstring, and vslen.

Referenced by luaV_execute(), luaV_execute(), and luaV_finishOp().

luaV_equalobj()

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

Definition at line 407 of file lua-5.3.6/src/lvm.c.

                                                                     {
  const TValue *tm;
  if (ttype(t1) != ttype(t2)) {  /* not the same variant? */
    if (ttnov(t1) != ttnov(t2) || ttnov(t1) != LUA_TNUMBER)
      return 0;  /* only numbers can be equal with different variants */
    else {  /* two numbers with different variants */
      lua_Integer i1, i2;  /* compare them as integers */
      return (tointeger(t1, &i1) && tointeger(t2, &i2) && i1 == i2);
    }
  }
  /* values have same type and same variant */
  switch (ttype(t1)) {
    case LUA_TNIL: return 1;
    case LUA_TNUMINT: return (ivalue(t1) == ivalue(t2));
    case LUA_TNUMFLT: return luai_numeq(fltvalue(t1), fltvalue(t2));
    case LUA_TBOOLEAN: return bvalue(t1) == bvalue(t2);  /* true must be 1 !! */
    case LUA_TLIGHTUSERDATA: return pvalue(t1) == pvalue(t2);
    case LUA_TLCF: return fvalue(t1) == fvalue(t2);
    case LUA_TSHRSTR: return eqshrstr(tsvalue(t1), tsvalue(t2));
    case LUA_TLNGSTR: return luaS_eqlngstr(tsvalue(t1), tsvalue(t2));
    case LUA_TUSERDATA: {
      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_TTABLE: {
      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 */
  luaT_callTM(L, tm, t1, t2, L->top, 1);  /* call TM */
  return !l_isfalse(L->top);
}

References bvalue, eqshrstr, F2Ieq, fasttm, fltvalue, fvalue, gcvalue, hvalue, ivalue, l_isfalse, LUA_TBOOLEAN, LUA_TLCF, LUA_TLIGHTUSERDATA, LUA_TLNGSTR, LUA_TNIL, LUA_TNUMBER, LUA_TNUMFLT, LUA_TNUMINT, LUA_TSHRSTR, LUA_TTABLE, LUA_TUSERDATA, 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_callTM(), luaT_callTMres(), luaV_tointegerns(), NULL, pvalue, s2v, TM_EQ, tointeger, lua_State::top, tsvalue, ttnov, ttype, ttypetag, and uvalue.

Referenced by lua_compare(), luaV_execute(), and luaV_execute().

luaV_execute()

LUAI_FUNC 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()

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

Definition at line 160 of file lua-5.3.6/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 (ttisnil(tm))
        luaG_typeerror(L, t, "index");  /* no metamethod */
      /* else will try the metamethod */
    }
    else {  /* 't' is a table */
      lua_assert(ttisnil(slot));
      tm = fasttm(L, hvalue(t)->metatable, TM_INDEX);  /* table's metamethod */
      if (tm == NULL) {  /* no metamethod? */
        setnilvalue(val);  /* result is nil */
        return;
      }
      /* else will try the metamethod */
    }
    if (ttisfunction(tm)) {  /* is metamethod a function? */
      luaT_callTM(L, tm, t, key, val, 1);  /* 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_callTM(), luaT_callTMres(), luaT_gettmbyobj(), luaV_fastget, MAXTAGLOOP, notm, NULL, s2v, setnilvalue, setobj2s, TM_INDEX, ttisfunction, ttisnil, and ttistable.

Referenced by auxgetstr(), auxgetstr(), lua_geti(), lua_gettable(), luaV_execute(), and luaV_execute().

luaV_finishOp()

LUAI_FUNC void luaV_finishOp

(

lua_State *

L

)

Definition at line 423 of file lua-5.2.4/src/lvm.c.

                                  {
  CallInfo *ci = L->ci;
  StkId base = ci->u.l.base;
  Instruction inst = *(ci->u.l.savedpc - 1);  /* interrupted instruction */
  OpCode op = GET_OPCODE(inst);
  switch (op) {  /* finish its execution */
    case OP_ADD: case OP_SUB: case OP_MUL: case OP_DIV:
    case OP_MOD: case OP_POW: case OP_UNM: case OP_LEN:
    case OP_GETTABUP: case OP_GETTABLE: case OP_SELF: {
      setobjs2s(L, base + GETARG_A(inst), --L->top);
      break;
    }
    case OP_LE: case OP_LT: case OP_EQ: {
      int res = !l_isfalse(L->top - 1);
      L->top--;
      /* metamethod should not be called when operand is K */
      lua_assert(!ISK(GETARG_B(inst)));
      if (op == OP_LE &&  /* "<=" using "<" instead? */
          ttisnil(luaT_gettmbyobj(L, base + GETARG_B(inst), TM_LE)))
        res = !res;  /* invert result */
      lua_assert(GET_OPCODE(*ci->u.l.savedpc) == OP_JMP);
      if (res != GETARG_A(inst))  /* condition failed? */
        ci->u.l.savedpc++;  /* skip jump instruction */
      break;
    }
    case OP_CONCAT: {
      StkId top = L->top - 1;  /* top when 'call_binTM' was called */
      int b = GETARG_B(inst);      /* first element to concatenate */
      int total = cast_int(top - 1 - (base + b));  /* yet to concatenate */
      setobj2s(L, top - 2, top);  /* put TM result in proper position */
      if (total > 1) {  /* are there elements to concat? */
        L->top = top - 1;  /* top is one after last element (at top-2) */
        luaV_concat(L, total);  /* concat them (may yield again) */
      }
      /* move final result to final position */
      setobj2s(L, ci->u.l.base + GETARG_A(inst), L->top - 1);
      L->top = ci->top;  /* restore top */
      break;
    }
    case OP_TFORCALL: {
      lua_assert(GET_OPCODE(*ci->u.l.savedpc) == OP_TFORLOOP);
      L->top = ci->top;  /* correct top */
      break;
    }
    case OP_CALL: {
      if (GETARG_C(inst) - 1 >= 0)  /* nresults >= 0? */
        L->top = ci->top;  /* adjust results */
      break;
    }
    case OP_TAILCALL: case OP_SETTABUP: case OP_SETTABLE:
      break;
    default: lua_assert(0);
  }
}

References CallInfo::base, CallInfo::callstatus, cast_int, lua_State::ci, CIST_LEQ, CallInfo::func, GET_OPCODE, GETARG_A, GETARG_B, GETARG_C, GETARG_k, ISK, CallInfo::l, l_isfalse, lua_assert, luaT_gettmbyobj(), luaV_concat(), OP_ADD, OP_BAND, OP_BNOT, OP_BOR, OP_BXOR, OP_CALL, OP_CLOSE, OP_CONCAT, OP_DIV, OP_EQ, OP_GEI, OP_GETFIELD, OP_GETI, OP_GETTABLE, OP_GETTABUP, OP_GTI, OP_IDIV, OP_JMP, OP_LE, OP_LEI, OP_LEN, OP_LT, OP_LTI, OP_MMBIN, OP_MMBINI, OP_MMBINK, OP_MOD, OP_MUL, OP_POW, OP_RETURN, OP_SELF, OP_SETFIELD, OP_SETI, OP_SETTABLE, OP_SETTABUP, OP_SHL, OP_SHR, OP_SUB, OP_TAILCALL, OP_TFORCALL, OP_TFORLOOP, OP_UNM, s2v, CallInfo::savedpc, setobj2s, setobjs2s, TM_LE, CallInfo::top, lua_State::top, ttisnil, and CallInfo::u.

Referenced by unroll(), unroll(), and unroll().

luaV_finishset()

LUAI_FUNC 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()

LUAI_FUNC 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()

LUAI_FUNC lua_Integer luaV_idiv	(	lua_State *	L,
		lua_Integer	x,
		lua_Integer	y )

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()

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

Definition at line 243 of file lua-5.2.4/src/lvm.c.

                                                                    {
  int res;
  if (ttisnumber(l) && ttisnumber(r))
    return luai_numle(L, nvalue(l), nvalue(r));
  else if (ttisstring(l) && ttisstring(r))
    return l_strcmp(rawtsvalue(l), rawtsvalue(r)) <= 0;
  else if ((res = call_orderTM(L, l, r, TM_LE)) >= 0)  /* first try `le' */
    return res;
  else if ((res = call_orderTM(L, r, l, TM_LT)) < 0)  /* else try `lt' */
    luaG_ordererror(L, l, r);
  return !res;
}

References call_orderTM(), CallInfo::callstatus, lua_State::ci, CIST_LEQ, l_strcmp(), l_strcmp(), LEnum(), LEnum(), lessequalothers(), luaG_ordererror(), luai_numle, luaT_callorderTM(), nvalue, rawtsvalue, TM_LE, TM_LT, tsvalue, ttisnumber, and ttisstring.

Referenced by lua_compare(), and luaV_execute().

luaV_lessthan()

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

Definition at line 225 of file lua-5.1.5/src/lvm.c.

                                                                   {
  int res;
  if (ttype(l) != ttype(r))
    return luaG_ordererror(L, l, r);
  else if (ttisnumber(l))
    return luai_numlt(nvalue(l), nvalue(r));
  else if (ttisstring(l))
    return l_strcmp(rawtsvalue(l), rawtsvalue(r)) < 0;
  else if ((res = call_orderTM(L, l, r, TM_LT)) != -1)
    return res;
  return luaG_ordererror(L, l, r);
}

References call_orderTM(), call_orderTM(), l_strcmp(), l_strcmp(), l_strcmp(), lessthanothers(), LTnum(), LTnum(), luaG_ordererror(), luai_numlt, luaT_callorderTM(), nvalue, rawtsvalue, TM_LT, tsvalue, ttisnumber, ttisstring, and ttype.

Referenced by lua_compare(), lua_lessthan(), luaV_execute(), and luaV_execute().

luaV_mod()

LUAI_FUNC lua_Integer luaV_mod	(	lua_State *	L,
		lua_Integer	x,
		lua_Integer	y )

Definition at line 572 of file lua-5.3.6/src/lvm.c.

                                                                  {
  if (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 && (m ^ 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 intarith(), intarith(), luaV_execute(), and luaV_execute().

luaV_modf()

LUAI_FUNC lua_Number luaV_modf	(	lua_State *	L,
		lua_Number	x,
		lua_Number	y )

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()

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

Definition at line 335 of file lua-5.2.4/src/lvm.c.

                                                            {
  const TValue *tm;
  switch (ttypenv(rb)) {
    case LUA_TTABLE: {
      Table *h = hvalue(rb);
      tm = fasttm(L, h->metatable, TM_LEN);
      if (tm) break;  /* metamethod? break switch to call it */
      setnvalue(ra, cast_num(luaH_getn(h)));  /* else primitive len */
      return;
    }
    case LUA_TSTRING: {
      setnvalue(ra, cast_num(tsvalue(rb)->len));
      return;
    }
    default: {  /* try metamethod */
      tm = luaT_gettmbyobj(L, rb, TM_LEN);
      if (ttisnil(tm))  /* no metamethod? */
        luaG_typeerror(L, rb, "get length of");
      break;
    }
  }
  callTM(L, tm, rb, rb, ra, 1);
}

References callTM(), cast_num, fasttm, hvalue, LUA_TLNGSTR, LUA_TSHRSTR, LUA_TSTRING, LUA_TTABLE, LUA_VLNGSTR, LUA_VSHRSTR, LUA_VTABLE, luaG_typeerror(), luaH_getn(), luaT_callTM(), luaT_callTMres(), luaT_gettmbyobj(), Table::metatable, notm, s2v, setivalue, setnvalue, TM_LEN, tsvalue, ttisnil, ttype, ttypenv, and ttypetag.

Referenced by lua_len(), luaV_execute(), and luaV_execute().

luaV_shiftl()

LUAI_FUNC lua_Integer luaV_shiftl	(	lua_Integer	x,
		lua_Integer	y )

Definition at line 593 of file lua-5.3.6/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 intarith(), intarith(), luaV_execute(), and luaV_execute().

luaV_tointeger()

LUAI_FUNC 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()

LUAI_FUNC 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_()

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

Definition at line 72 of file lua-5.3.6/src/lvm.c.

                                                      {
  TValue v;
  if (ttisinteger(obj)) {
    *n = cast_num(ivalue(obj));
    return 1;
  }
  else if (cvt2num(obj) &&  /* string convertible to number? */
            luaO_str2num(svalue(obj), &v) == vslen(obj) + 1) {
    *n = nvalue(&v);  /* convert result of 'luaO_str2num' to a float */
    return 1;
  }
  else
    return 0;  /* conversion failed */
}

References cast_num, cvt2num, ivalue, l_strton(), luaO_str2num(), nvalue, svalue, ttisinteger, and vslen.