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   0
#define	tonumber(o, n)    (ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n))
#define	tointeger(o, i)    (ttisinteger(o) ? (*(i) = ivalue(o), 1) : luaV_tointeger(o,i,LUA_FLOORN2I))
#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_gettable(L, t, k, v)
#define	luaV_fastset(L, t, k, slot, f, v)
#define	luaV_settable(L, t, k, v)

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, int 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, StkId val, const TValue *slot)
LUAI_FUNC void	luaV_finishOp (lua_State *L)
LUAI_FUNC void	luaV_execute (lua_State *L)
LUAI_FUNC void	luaV_concat (lua_State *L, int total)
LUAI_FUNC lua_Integer	luaV_div (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_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-5.3.6/src/lvm.h.

Referenced by l_strton(), luaV_tointeger(), and luaV_tonumber_().

cvt2str

#define cvt2str

(

o

)

ttisnumber(o)

Definition at line 17 of file lua-5.3.6/src/lvm.h.

Referenced by lua_isstring(), lua_tolstring(), luaG_concaterror(), and luaV_concat().

intop

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

Definition at line 46 of file lua-5.3.6/src/lvm.h.

Referenced by intarith(), intarith(), luaV_div(), luaV_execute(), luaV_execute(), luaV_idiv(), and luaV_shiftl().

LUA_FLOORN2I

#define LUA_FLOORN2I   0

Definition at line 36 of file lua-5.3.6/src/lvm.h.

Referenced by luaG_tointerror(), and validop().

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 */  \
      !ttisnil(slot)))  /* result not nil? */

Definition at line 58 of file lua-5.3.6/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 */  \
      !ttisnil(slot)))  /* result not nil? */

Referenced by auxgetstr(), auxgetstr(), auxsetstr(), lua_geti(), lua_gettable(), lua_settable(), luaV_execute(), luaV_execute(), luaV_finishget(), and luaV_finishset().

luaV_fastset

#define luaV_fastset	(		L,
			t,
			k,
			slot,
			f,
			v )

Value:

  (!ttistable(t) \
   ? (slot = NULL, 0) \
   : (slot = f(hvalue(t), k), \
     ttisnil(slot) ? 0 \
     : (luaC_barrierback(L, hvalue(t), v), \
        setobj2t(L, cast(TValue *,slot), v), \
        1)))

Definition at line 80 of file lua-5.3.6/src/lvm.h.

#define luaV_fastset(L,t,k,slot,f,v) \
  (!ttistable(t) \
   ? (slot = NULL, 0) \
   : (slot = f(hvalue(t), k), \
     ttisnil(slot) ? 0 \
     : (luaC_barrierback(L, hvalue(t), v), \
        setobj2t(L, cast(TValue *,slot), v), \
        1)))

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

luaV_gettable

#define luaV_gettable	(		L,
			t,
			k,
			v )

Value:

  { const TValue *slot; \
  if (luaV_fastget(L,t,k,slot,luaH_get)) { setobj2s(L, v, slot); } \
  else luaV_finishget(L,t,k,v,slot); }

Definition at line 67 of file lua-5.3.6/src/lvm.h.

#define luaV_gettable(L,t,k,v) { const TValue *slot; \
  if (luaV_fastget(L,t,k,slot,luaH_get)) { setobj2s(L, v, slot); } \
  else luaV_finishget(L,t,k,v,slot); }

Referenced by lua_getfield(), lua_getglobal(), lua_gettable(), luaV_execute(), and luaV_execute().

luaV_rawequalobj

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

Definition at line 48 of file lua-5.3.6/src/lvm.h.

luaV_settable

#define luaV_settable	(		L,
			t,
			k,
			v )

Value:

  { const TValue *slot; \
  if (!luaV_fastset(L,t,k,slot,luaH_get,v)) \
    luaV_finishset(L,t,k,v,slot); }

Definition at line 90 of file lua-5.3.6/src/lvm.h.

#define luaV_settable(L,t,k,v) { const TValue *slot; \
  if (!luaV_fastset(L,t,k,slot,luaH_get,v)) \
    luaV_finishset(L,t,k,v,slot); }

Referenced by lua_setfield(), lua_setglobal(), lua_settable(), luaV_execute(), and luaV_execute().

tointeger

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

Definition at line 43 of file lua-5.3.6/src/lvm.h.

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

Referenced by lua_tointegerx(), luaG_tointerror(), luaO_arith(), luaV_equalobj(), luaV_execute(), and validop().

tonumber

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

Definition at line 40 of file lua-5.3.6/src/lvm.h.

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

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 */
}

luaV_div()

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

Definition at line 552 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 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_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);
}

luaV_execute()

LUAI_FUNC void luaV_execute

(

lua_State *

L

)

Definition at line 534 of file lua-5.2.4/src/lvm.c.

                                 {
  CallInfo *ci = L->ci;
  LClosure *cl;
  TValue *k;
  StkId base;
 newframe:  /* reentry point when frame changes (call/return) */
  lua_assert(ci == L->ci);
  cl = clLvalue(ci->func);
  k = cl->p->k;
  base = ci->u.l.base;
  /* main loop of interpreter */
  for (;;) {
    Instruction i = *(ci->u.l.savedpc++);
    StkId ra;
    if ((L->hookmask & (LUA_MASKLINE | LUA_MASKCOUNT)) &&
        (--L->hookcount == 0 || L->hookmask & LUA_MASKLINE)) {
      Protect(traceexec(L));
    }
    /* WARNING: several calls may realloc the stack and invalidate `ra' */
    ra = RA(i);
    lua_assert(base == ci->u.l.base);
    lua_assert(base <= L->top && L->top < L->stack + L->stacksize);
    vmdispatch (GET_OPCODE(i)) {
      vmcase(OP_MOVE,
        setobjs2s(L, ra, RB(i));
      )
      vmcase(OP_LOADK,
        TValue *rb = k + GETARG_Bx(i);
        setobj2s(L, ra, rb);
      )
      vmcase(OP_LOADKX,
        TValue *rb;
        lua_assert(GET_OPCODE(*ci->u.l.savedpc) == OP_EXTRAARG);
        rb = k + GETARG_Ax(*ci->u.l.savedpc++);
        setobj2s(L, ra, rb);
      )
      vmcase(OP_LOADBOOL,
        setbvalue(ra, GETARG_B(i));
        if (GETARG_C(i)) ci->u.l.savedpc++;  /* skip next instruction (if C) */
      )
      vmcase(OP_LOADNIL,
        int b = GETARG_B(i);
        do {
          setnilvalue(ra++);
        } while (b--);
      )
      vmcase(OP_GETUPVAL,
        int b = GETARG_B(i);
        setobj2s(L, ra, cl->upvals[b]->v);
      )
      vmcase(OP_GETTABUP,
        int b = GETARG_B(i);
        Protect(luaV_gettable(L, cl->upvals[b]->v, RKC(i), ra));
      )
      vmcase(OP_GETTABLE,
        Protect(luaV_gettable(L, RB(i), RKC(i), ra));
      )
      vmcase(OP_SETTABUP,
        int a = GETARG_A(i);
        Protect(luaV_settable(L, cl->upvals[a]->v, RKB(i), RKC(i)));
      )
      vmcase(OP_SETUPVAL,
        UpVal *uv = cl->upvals[GETARG_B(i)];
        setobj(L, uv->v, ra);
        luaC_barrier(L, uv, ra);
      )
      vmcase(OP_SETTABLE,
        Protect(luaV_settable(L, ra, RKB(i), RKC(i)));
      )
      vmcase(OP_NEWTABLE,
        int b = GETARG_B(i);
        int c = GETARG_C(i);
        Table *t = luaH_new(L);
        sethvalue(L, ra, t);
        if (b != 0 || c != 0)
          luaH_resize(L, t, luaO_fb2int(b), luaO_fb2int(c));
        checkGC(L, ra + 1);
      )
      vmcase(OP_SELF,
        StkId rb = RB(i);
        setobjs2s(L, ra+1, rb);
        Protect(luaV_gettable(L, rb, RKC(i), ra));
      )
      vmcase(OP_ADD,
        arith_op(luai_numadd, TM_ADD);
      )
      vmcase(OP_SUB,
        arith_op(luai_numsub, TM_SUB);
      )
      vmcase(OP_MUL,
        arith_op(luai_nummul, TM_MUL);
      )
      vmcase(OP_DIV,
        arith_op(luai_numdiv, TM_DIV);
      )
      vmcase(OP_MOD,
        arith_op(luai_nummod, TM_MOD);
      )
      vmcase(OP_POW,
        arith_op(luai_numpow, TM_POW);
      )
      vmcase(OP_UNM,
        TValue *rb = RB(i);
        if (ttisnumber(rb)) {
          lua_Number nb = nvalue(rb);
          setnvalue(ra, luai_numunm(L, nb));
        }
        else {
          Protect(luaV_arith(L, ra, rb, rb, TM_UNM));
        }
      )
      vmcase(OP_NOT,
        TValue *rb = RB(i);
        int res = l_isfalse(rb);  /* next assignment may change this value */
        setbvalue(ra, res);
      )
      vmcase(OP_LEN,
        Protect(luaV_objlen(L, ra, RB(i)));
      )
      vmcase(OP_CONCAT,
        int b = GETARG_B(i);
        int c = GETARG_C(i);
        StkId rb;
        L->top = base + c + 1;  /* mark the end of concat operands */
        Protect(luaV_concat(L, c - b + 1));
        ra = RA(i);  /* 'luav_concat' may invoke TMs and move the stack */
        rb = b + base;
        setobjs2s(L, ra, rb);
        checkGC(L, (ra >= rb ? ra + 1 : rb));
        L->top = ci->top;  /* restore top */
      )
      vmcase(OP_JMP,
        dojump(ci, i, 0);
      )
      vmcase(OP_EQ,
        TValue *rb = RKB(i);
        TValue *rc = RKC(i);
        Protect(
          if (cast_int(equalobj(L, rb, rc)) != GETARG_A(i))
            ci->u.l.savedpc++;
          else
            donextjump(ci);
        )
      )
      vmcase(OP_LT,
        Protect(
          if (luaV_lessthan(L, RKB(i), RKC(i)) != GETARG_A(i))
            ci->u.l.savedpc++;
          else
            donextjump(ci);
        )
      )
      vmcase(OP_LE,
        Protect(
          if (luaV_lessequal(L, RKB(i), RKC(i)) != GETARG_A(i))
            ci->u.l.savedpc++;
          else
            donextjump(ci);
        )
      )
      vmcase(OP_TEST,
        if (GETARG_C(i) ? l_isfalse(ra) : !l_isfalse(ra))
            ci->u.l.savedpc++;
          else
          donextjump(ci);
      )
      vmcase(OP_TESTSET,
        TValue *rb = RB(i);
        if (GETARG_C(i) ? l_isfalse(rb) : !l_isfalse(rb))
          ci->u.l.savedpc++;
        else {
          setobjs2s(L, ra, rb);
          donextjump(ci);
        }
      )
      vmcase(OP_CALL,
        int b = GETARG_B(i);
        int nresults = GETARG_C(i) - 1;
        if (b != 0) L->top = ra+b;  /* else previous instruction set top */
        if (luaD_precall(L, ra, nresults)) {  /* C function? */
          if (nresults >= 0) L->top = ci->top;  /* adjust results */
          base = ci->u.l.base;
        }
        else {  /* Lua function */
          ci = L->ci;
          ci->callstatus |= CIST_REENTRY;
          goto newframe;  /* restart luaV_execute over new Lua function */
        }
      )
      vmcase(OP_TAILCALL,
        int b = GETARG_B(i);
        if (b != 0) L->top = ra+b;  /* else previous instruction set top */
        lua_assert(GETARG_C(i) - 1 == LUA_MULTRET);
        if (luaD_precall(L, ra, LUA_MULTRET))  /* C function? */
          base = ci->u.l.base;
        else {
          /* tail call: put called frame (n) in place of caller one (o) */
          CallInfo *nci = L->ci;  /* called frame */
          CallInfo *oci = nci->previous;  /* caller frame */
          StkId nfunc = nci->func;  /* called function */
          StkId ofunc = oci->func;  /* caller function */
          /* last stack slot filled by 'precall' */
          StkId lim = nci->u.l.base + getproto(nfunc)->numparams;
          int aux;
          /* close all upvalues from previous call */
          if (cl->p->sizep > 0) luaF_close(L, oci->u.l.base);
          /* move new frame into old one */
          for (aux = 0; nfunc + aux < lim; aux++)
            setobjs2s(L, ofunc + aux, nfunc + aux);
          oci->u.l.base = ofunc + (nci->u.l.base - nfunc);  /* correct base */
          oci->top = L->top = ofunc + (L->top - nfunc);  /* correct top */
          oci->u.l.savedpc = nci->u.l.savedpc;
          oci->callstatus |= CIST_TAIL;  /* function was tail called */
          ci = L->ci = oci;  /* remove new frame */
          lua_assert(L->top == oci->u.l.base + getproto(ofunc)->maxstacksize);
          goto newframe;  /* restart luaV_execute over new Lua function */
        }
      )
      vmcasenb(OP_RETURN,
        int b = GETARG_B(i);
        if (b != 0) L->top = ra+b-1;
        if (cl->p->sizep > 0) luaF_close(L, base);
        b = luaD_poscall(L, ra);
        if (!(ci->callstatus & CIST_REENTRY))  /* 'ci' still the called one */
          return;  /* external invocation: return */
        else {  /* invocation via reentry: continue execution */
          ci = L->ci;
          if (b) L->top = ci->top;
          lua_assert(isLua(ci));
          lua_assert(GET_OPCODE(*((ci)->u.l.savedpc - 1)) == OP_CALL);
          goto newframe;  /* restart luaV_execute over new Lua function */
        }
      )
      vmcase(OP_FORLOOP,
        lua_Number step = nvalue(ra+2);
        lua_Number idx = luai_numadd(L, nvalue(ra), step); /* increment index */
        lua_Number limit = nvalue(ra+1);
        if (luai_numlt(L, 0, step) ? luai_numle(L, idx, limit)
                                   : luai_numle(L, limit, idx)) {
          ci->u.l.savedpc += GETARG_sBx(i);  /* jump back */
          setnvalue(ra, idx);  /* update internal index... */
          setnvalue(ra+3, idx);  /* ...and external index */
        }
      )
      vmcase(OP_FORPREP,
        const TValue *init = ra;
        const TValue *plimit = ra+1;
        const TValue *pstep = ra+2;
        if (!tonumber(init, ra))
          luaG_runerror(L, LUA_QL("for") " initial value must be a number");
        else if (!tonumber(plimit, ra+1))
          luaG_runerror(L, LUA_QL("for") " limit must be a number");
        else if (!tonumber(pstep, ra+2))
          luaG_runerror(L, LUA_QL("for") " step must be a number");
        setnvalue(ra, luai_numsub(L, nvalue(ra), nvalue(pstep)));
        ci->u.l.savedpc += GETARG_sBx(i);
      )
      vmcasenb(OP_TFORCALL,
        StkId cb = ra + 3;  /* call base */
        setobjs2s(L, cb+2, ra+2);
        setobjs2s(L, cb+1, ra+1);
        setobjs2s(L, cb, ra);
        L->top = cb + 3;  /* func. + 2 args (state and index) */
        Protect(luaD_call(L, cb, GETARG_C(i), 1));
        L->top = ci->top;
        i = *(ci->u.l.savedpc++);  /* go to next instruction */
        ra = RA(i);
        lua_assert(GET_OPCODE(i) == OP_TFORLOOP);
        goto l_tforloop;
      )
      vmcase(OP_TFORLOOP,
        l_tforloop:
        if (!ttisnil(ra + 1)) {  /* continue loop? */
          setobjs2s(L, ra, ra + 1);  /* save control variable */
           ci->u.l.savedpc += GETARG_sBx(i);  /* jump back */
        }
      )
      vmcase(OP_SETLIST,
        int n = GETARG_B(i);
        int c = GETARG_C(i);
        int last;
        Table *h;
        if (n == 0) n = cast_int(L->top - ra) - 1;
        if (c == 0) {
          lua_assert(GET_OPCODE(*ci->u.l.savedpc) == OP_EXTRAARG);
          c = GETARG_Ax(*ci->u.l.savedpc++);
        }
        luai_runtimecheck(L, ttistable(ra));
        h = hvalue(ra);
        last = ((c-1)*LFIELDS_PER_FLUSH) + n;
        if (last > h->sizearray)  /* needs more space? */
          luaH_resizearray(L, h, last);  /* pre-allocate it at once */
        for (; n > 0; n--) {
          TValue *val = ra+n;
          luaH_setint(L, h, last--, val);
          luaC_barrierback(L, obj2gco(h), val);
        }
        L->top = ci->top;  /* correct top (in case of previous open call) */
      )
      vmcase(OP_CLOSURE,
        Proto *p = cl->p->p[GETARG_Bx(i)];
        Closure *ncl = getcached(p, cl->upvals, base);  /* cached closure */
        if (ncl == NULL)  /* no match? */
          pushclosure(L, p, cl->upvals, base, ra);  /* create a new one */
        else
          setclLvalue(L, ra, ncl);  /* push cashed closure */
        checkGC(L, ra + 1);
      )
      vmcase(OP_VARARG,
        int b = GETARG_B(i) - 1;
        int j;
        int n = cast_int(base - ci->func) - cl->p->numparams - 1;
        if (b < 0) {  /* B == 0? */
          b = n;  /* get all var. arguments */
          Protect(luaD_checkstack(L, n));
          ra = RA(i);  /* previous call may change the stack */
          L->top = ra + n;
        }
        for (j = 0; j < b; j++) {
          if (j < n) {
            setobjs2s(L, ra + j, base - n + j);
          }
          else {
            setnilvalue(ra + j);
          }
        }
      )
      vmcase(OP_EXTRAARG,
        lua_assert(0);
      )
    }
  }
}

References arith_op, CallInfo::base, CallInfo::callstatus, cast_int, checkGC, chgfltvalue, chgivalue, lua_State::ci, CIST_FRESH, CIST_REENTRY, CIST_TAIL, clLvalue, dojump, donextjump, equalobj, fltvalue, forlimit(), CallInfo::func, GET_OPCODE, GETARG_A, GETARG_Ax, GETARG_B, GETARG_Bx, GETARG_C, GETARG_sBx, getcached(), getcached(), getproto, gettableProtected, lua_State::hookcount, lua_State::hookmask, hvalue, intop, isLua, ivalue, Proto::k, CallInfo::l, l_castS2U, l_isfalse, LFIELDS_PER_FLUSH, lua_assert, LUA_MASKCOUNT, LUA_MASKLINE, LUA_MULTRET, LUA_QL, luaC_barrier, luaC_barrierback, luaC_upvalbarrier, luaD_call(), luaD_checkstack, luaD_poscall(), luaD_precall(), luaF_close(), luaG_runerror(), luaH_getstr(), luaH_new(), luaH_resize(), luaH_resizearray(), luaH_setint(), luai_numadd, luai_numdiv, luai_numidiv, luai_numle, luai_numlt, luai_nummod, luai_nummul, luai_numpow, luai_numsub, luai_numunm, luai_runtimecheck, luaO_fb2int(), luaT_trybinTM(), luaV_arith(), luaV_concat(), luaV_div(), luaV_equalobj(), luaV_fastget, luaV_finishget(), luaV_gettable, luaV_lessequal(), luaV_lessthan(), luaV_mod(), luaV_objlen(), luaV_settable, luaV_shiftl(), NULL, Proto::numparams, nvalue, obj2gco, OP_ADD, OP_BAND, OP_BNOT, OP_BOR, OP_BXOR, OP_CALL, OP_CLOSURE, OP_CONCAT, OP_DIV, OP_EQ, OP_EXTRAARG, OP_FORLOOP, OP_FORPREP, OP_GETTABLE, OP_GETTABUP, OP_GETUPVAL, OP_IDIV, OP_JMP, OP_LE, OP_LEN, OP_LOADBOOL, OP_LOADK, OP_LOADKX, OP_LOADNIL, OP_LT, OP_MOD, OP_MOVE, OP_MUL, OP_NEWTABLE, OP_NOT, OP_POW, OP_RETURN, OP_SELF, OP_SETLIST, OP_SETTABLE, OP_SETTABUP, OP_SETUPVAL, OP_SHL, OP_SHR, OP_SUB, OP_TAILCALL, OP_TEST, OP_TESTSET, OP_TFORCALL, OP_TFORLOOP, OP_UNM, OP_VARARG, Proto::p, LClosure::p, CallInfo::previous, Protect, pushclosure(), pushclosure(), RA, RB, RKB, RKC, CallInfo::savedpc, setbvalue, setclLvalue, setfltvalue, sethvalue, setivalue, setnilvalue, setnvalue, setobj, setobj2s, setobjs2s, settableProtected, Table::sizearray, Proto::sizep, lua_State::stack, lua_State::stacksize, TM_ADD, TM_BAND, TM_BNOT, TM_BOR, TM_BXOR, TM_DIV, TM_IDIV, TM_MOD, TM_MUL, TM_POW, TM_SHL, TM_SHR, TM_SUB, TM_UNM, tointeger, tonumber, CallInfo::top, lua_State::top, traceexec(), tsvalue, ttisinteger, ttisnil, ttisnumber, ttistable, CallInfo::u, LClosure::upvals, UpVal::v, vmbreak, vmcase, vmcasenb, vmdispatch, and vmfetch.

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");
}

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);
  }
}

luaV_finishset()

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

Definition at line 203 of file lua-5.3.6/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(ttisnil(slot));  /* old value must be nil */
      tm = fasttm(L, h->metatable, TM_NEWINDEX);  /* get metamethod */
      if (tm == NULL) {  /* no metamethod? */
        if (slot == luaO_nilobject)  /* no previous entry? */
          slot = luaH_newkey(L, h, key);  /* create one */
        /* no metamethod and (now) there is an entry with given key */
        setobj2t(L, cast(TValue *, slot), val);  /* set its new value */
        invalidateTMcache(h);
        luaC_barrierback(L, h, val);
        return;
      }
      /* else will try the metamethod */
    }
    else {  /* not a table; check metamethod */
      if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_NEWINDEX)))
        luaG_typeerror(L, t, "index");
    }
    /* try the metamethod */
    if (ttisfunction(tm)) {
      luaT_callTM(L, tm, t, key, val, 0);
      return;
    }
    t = tm;  /* else repeat assignment over 'tm' */
    if (luaV_fastset(L, t, key, slot, luaH_get, val))
      return;  /* done */
    /* else loop */
  }
  luaG_runerror(L, "'__newindex' chain too long; possible loop");
}

References cast, fasttm, hvalue, invalidateTMcache, lua_assert, luaC_barrierback, luaG_runerror(), luaG_typeerror(), luaH_get(), luaH_newkey(), luaO_nilobject, luaT_callTM(), luaT_gettmbyobj(), luaV_fastset, MAXTAGLOOP, Table::metatable, NULL, setobj2t, TM_NEWINDEX, ttisfunction, and ttisnil.

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

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;
}

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);
}

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;
  }
}

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);
}

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);
  }
}

luaV_tointeger()

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

Definition at line 94 of file lua-5.3.6/src/lvm.c.

                                                                 {
  TValue v;
 again:
  if (ttisfloat(obj)) {
    lua_Number n = fltvalue(obj);
    lua_Number f = l_floor(n);
    if (n != f) {  /* not an integral value? */
      if (mode == 0) return 0;  /* fails if mode demands integral value */
      else if (mode > 1)  /* needs ceil? */
        f += 1;  /* convert floor to ceil (remember: n != f) */
    }
    return lua_numbertointeger(f, p);
  }
  else if (ttisinteger(obj)) {
    *p = ivalue(obj);
    return 1;
  }
  else if (cvt2num(obj) &&
            luaO_str2num(svalue(obj), &v) == vslen(obj) + 1) {
    obj = &v;
    goto again;  /* convert result from 'luaO_str2num' to an integer */
  }
  return 0;  /* conversion failed */
}

References cvt2num, fltvalue, ivalue, l_floor, lua_numbertointeger, luaO_str2num(), svalue, ttisfloat, ttisinteger, and vslen.

Referenced by forlimit(), luaH_get(), and luaH_newkey().

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 */
}