misc/liblua/lvm.c
author sheepluva
Wed, 18 Jun 2014 17:06:40 +0200
changeset 10327 c3770d87311b
parent 10017 de822cd3df3a
permissions -rw-r--r--
reuse buffers
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/*
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** $Id: lvm.c,v 2.63.1.3 2007/12/28 15:32:23 roberto Exp $
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** Lua virtual machine
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** See Copyright Notice in lua.h
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define lvm_c
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#define LUA_CORE
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#include "lua.h"
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#include "ldebug.h"
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#include "ldo.h"
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#include "lfunc.h"
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#include "lgc.h"
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#include "lobject.h"
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#include "lopcodes.h"
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#include "lstate.h"
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#include "lstring.h"
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#include "ltable.h"
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#include "ltm.h"
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#include "lvm.h"
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/* limit for table tag-method chains (to avoid loops) */
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#define MAXTAGLOOP  100
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const TValue *luaV_tonumber (const TValue *obj, TValue *n) {
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  lua_Number num;
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  if (ttisnumber(obj)) return obj;
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  if (ttisstring(obj) && luaO_str2d(svalue(obj), &num)) {
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    setnvalue(n, num);
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    return n;
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  }
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  else
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    return NULL;
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}
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int luaV_tostring (lua_State *L, StkId obj) {
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  if (!ttisnumber(obj))
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    return 0;
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  else {
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    char s[LUAI_MAXNUMBER2STR];
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    lua_Number n = nvalue(obj);
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    lua_number2str(s, n);
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    setsvalue2s(L, obj, luaS_new(L, s));
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    return 1;
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  }
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}
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static void traceexec (lua_State *L, const Instruction *pc) {
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  lu_byte mask = L->hookmask;
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  const Instruction *oldpc = L->savedpc;
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  L->savedpc = pc;
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  if ((mask & LUA_MASKCOUNT) && L->hookcount == 0) {
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    resethookcount(L);
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    luaD_callhook(L, LUA_HOOKCOUNT, -1);
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  }
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  if (mask & LUA_MASKLINE) {
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    Proto *p = ci_func(L->ci)->l.p;
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    int npc = pcRel(pc, p);
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    int newline = getline(p, npc);
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    /* call linehook when enter a new function, when jump back (loop),
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       or when enter a new line */
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    if (npc == 0 || pc <= oldpc || newline != getline(p, pcRel(oldpc, p)))
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      luaD_callhook(L, LUA_HOOKLINE, newline);
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  }
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}
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static void callTMres (lua_State *L, StkId res, const TValue *f,
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                        const TValue *p1, const TValue *p2) {
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  ptrdiff_t result = savestack(L, res);
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  setobj2s(L, L->top, f);  /* push function */
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  setobj2s(L, L->top+1, p1);  /* 1st argument */
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  setobj2s(L, L->top+2, p2);  /* 2nd argument */
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  luaD_checkstack(L, 3);
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  L->top += 3;
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  luaD_call(L, L->top - 3, 1);
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  res = restorestack(L, result);
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  L->top--;
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  setobjs2s(L, res, L->top);
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}
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static void callTM (lua_State *L, const TValue *f, const TValue *p1,
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                    const TValue *p2, const TValue *p3) {
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  setobj2s(L, L->top, f);  /* push function */
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  setobj2s(L, L->top+1, p1);  /* 1st argument */
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  setobj2s(L, L->top+2, p2);  /* 2nd argument */
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  setobj2s(L, L->top+3, p3);  /* 3th argument */
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  luaD_checkstack(L, 4);
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  L->top += 4;
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  luaD_call(L, L->top - 4, 0);
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}
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void luaV_gettable (lua_State *L, const TValue *t, TValue *key, StkId val) {
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  int loop;
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  for (loop = 0; loop < MAXTAGLOOP; loop++) {
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    const TValue *tm;
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    if (ttistable(t)) {  /* `t' is a table? */
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      Table *h = hvalue(t);
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      const TValue *res = luaH_get(h, key); /* do a primitive get */
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      if (!ttisnil(res) ||  /* result is no nil? */
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          (tm = fasttm(L, h->metatable, TM_INDEX)) == NULL) { /* or no TM? */
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        setobj2s(L, val, res);
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        return;
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      }
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      /* else will try the tag method */
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    }
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    else if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_INDEX)))
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      luaG_typeerror(L, t, "index");
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    if (ttisfunction(tm)) {
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      callTMres(L, val, tm, t, key);
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      return;
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    }
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    t = tm;  /* else repeat with `tm' */
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  }
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  luaG_runerror(L, "loop in gettable");
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}
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void luaV_settable (lua_State *L, const TValue *t, TValue *key, StkId val) {
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  int loop;
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  for (loop = 0; loop < MAXTAGLOOP; loop++) {
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    const TValue *tm;
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    if (ttistable(t)) {  /* `t' is a table? */
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      Table *h = hvalue(t);
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      TValue *oldval = luaH_set(L, h, key); /* do a primitive set */
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      if (!ttisnil(oldval) ||  /* result is no nil? */
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          (tm = fasttm(L, h->metatable, TM_NEWINDEX)) == NULL) { /* or no TM? */
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        setobj2t(L, oldval, val);
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        luaC_barriert(L, h, val);
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        return;
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      }
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      /* else will try the tag method */
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    }
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    else if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_NEWINDEX)))
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      luaG_typeerror(L, t, "index");
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    if (ttisfunction(tm)) {
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      callTM(L, tm, t, key, val);
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      return;
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    }
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    t = tm;  /* else repeat with `tm' */
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  }
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  luaG_runerror(L, "loop in settable");
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}
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static int call_binTM (lua_State *L, const TValue *p1, const TValue *p2,
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                       StkId res, TMS event) {
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  const TValue *tm = luaT_gettmbyobj(L, p1, event);  /* try first operand */
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  if (ttisnil(tm))
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    tm = luaT_gettmbyobj(L, p2, event);  /* try second operand */
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  if (ttisnil(tm)) return 0;
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  callTMres(L, res, tm, p1, p2);
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  return 1;
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}
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static const TValue *get_compTM (lua_State *L, Table *mt1, Table *mt2,
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                                  TMS event) {
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  const TValue *tm1 = fasttm(L, mt1, event);
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  const TValue *tm2;
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  if (tm1 == NULL) return NULL;  /* no metamethod */
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  if (mt1 == mt2) return tm1;  /* same metatables => same metamethods */
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  tm2 = fasttm(L, mt2, event);
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  if (tm2 == NULL) return NULL;  /* no metamethod */
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  if (luaO_rawequalObj(tm1, tm2))  /* same metamethods? */
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    return tm1;
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  return NULL;
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}
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static int call_orderTM (lua_State *L, const TValue *p1, const TValue *p2,
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                         TMS event) {
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  const TValue *tm1 = luaT_gettmbyobj(L, p1, event);
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  const TValue *tm2;
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  if (ttisnil(tm1)) return -1;  /* no metamethod? */
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  tm2 = luaT_gettmbyobj(L, p2, event);
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  if (!luaO_rawequalObj(tm1, tm2))  /* different metamethods? */
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    return -1;
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  callTMres(L, L->top, tm1, p1, p2);
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  return !l_isfalse(L->top);
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}
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static int l_strcmp (const TString *ls, const TString *rs) {
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  const char *l = getstr(ls);
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  size_t ll = ls->tsv.len;
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  const char *r = getstr(rs);
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  size_t lr = rs->tsv.len;
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  for (;;) {
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    int temp = strcoll(l, r);
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    if (temp != 0) return temp;
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    else {  /* strings are equal up to a `\0' */
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      size_t len = strlen(l);  /* index of first `\0' in both strings */
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      if (len == lr)  /* r is finished? */
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        return (len == ll) ? 0 : 1;
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      else if (len == ll)  /* l is finished? */
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        return -1;  /* l is smaller than r (because r is not finished) */
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      /* both strings longer than `len'; go on comparing (after the `\0') */
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      len++;
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      l += len; ll -= len; r += len; lr -= len;
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    }
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  }
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}
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int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r) {
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  int res;
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  if (ttype(l) != ttype(r))
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    return luaG_ordererror(L, l, r);
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  else if (ttisnumber(l))
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    return luai_numlt(nvalue(l), nvalue(r));
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  else if (ttisstring(l))
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    return l_strcmp(rawtsvalue(l), rawtsvalue(r)) < 0;
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  else if ((res = call_orderTM(L, l, r, TM_LT)) != -1)
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    return res;
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  return luaG_ordererror(L, l, r);
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}
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static int lessequal (lua_State *L, const TValue *l, const TValue *r) {
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  int res;
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  if (ttype(l) != ttype(r))
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    return luaG_ordererror(L, l, r);
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  else if (ttisnumber(l))
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    return luai_numle(nvalue(l), nvalue(r));
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  else if (ttisstring(l))
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    return l_strcmp(rawtsvalue(l), rawtsvalue(r)) <= 0;
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  else if ((res = call_orderTM(L, l, r, TM_LE)) != -1)  /* first try `le' */
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    return res;
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  else if ((res = call_orderTM(L, r, l, TM_LT)) != -1)  /* else try `lt' */
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    return !res;
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  return luaG_ordererror(L, l, r);
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}
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int luaV_equalval (lua_State *L, const TValue *t1, const TValue *t2) {
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  const TValue *tm;
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  lua_assert(ttype(t1) == ttype(t2));
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  switch (ttype(t1)) {
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    case LUA_TNIL: return 1;
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    case LUA_TNUMBER: return luai_numeq(nvalue(t1), nvalue(t2));
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    case LUA_TBOOLEAN: return bvalue(t1) == bvalue(t2);  /* true must be 1 !! */
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    case LUA_TLIGHTUSERDATA: return pvalue(t1) == pvalue(t2);
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    case LUA_TUSERDATA: {
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      if (uvalue(t1) == uvalue(t2)) return 1;
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      tm = get_compTM(L, uvalue(t1)->metatable, uvalue(t2)->metatable,
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                         TM_EQ);
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      break;  /* will try TM */
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    }
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    case LUA_TTABLE: {
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      if (hvalue(t1) == hvalue(t2)) return 1;
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      tm = get_compTM(L, hvalue(t1)->metatable, hvalue(t2)->metatable, TM_EQ);
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      break;  /* will try TM */
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    }
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    default: return gcvalue(t1) == gcvalue(t2);
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  }
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  if (tm == NULL) return 0;  /* no TM? */
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  callTMres(L, L->top, tm, t1, t2);  /* call TM */
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  return !l_isfalse(L->top);
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}
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void luaV_concat (lua_State *L, int total, int last) {
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  do {
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    StkId top = L->base + last + 1;
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    int n = 2;  /* number of elements handled in this pass (at least 2) */
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    if (!(ttisstring(top-2) || ttisnumber(top-2)) || !tostring(L, top-1)) {
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      if (!call_binTM(L, top-2, top-1, top-2, TM_CONCAT))
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        luaG_concaterror(L, top-2, top-1);
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    } else if (tsvalue(top-1)->len == 0)  /* second op is empty? */
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      (void)tostring(L, top - 2);  /* result is first op (as string) */
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    else {
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      /* at least two string values; get as many as possible */
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      size_t tl = tsvalue(top-1)->len;
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      char *buffer;
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      int i;
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      /* collect total length */
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      for (n = 1; n < total && tostring(L, top-n-1); n++) {
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        size_t l = tsvalue(top-n-1)->len;
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        if (l >= MAX_SIZET - tl) luaG_runerror(L, "string length overflow");
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        tl += l;
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      }
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      buffer = luaZ_openspace(L, &G(L)->buff, tl);
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      tl = 0;
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      for (i=n; i>0; i--) {  /* concat all strings */
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        size_t l = tsvalue(top-i)->len;
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        memcpy(buffer+tl, svalue(top-i), l);
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        tl += l;
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      }
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      setsvalue2s(L, top-n, luaS_newlstr(L, buffer, tl));
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    }
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    total -= n-1;  /* got `n' strings to create 1 new */
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    last -= n-1;
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  } while (total > 1);  /* repeat until only 1 result left */
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}
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static void Arith (lua_State *L, StkId ra, const TValue *rb,
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                   const TValue *rc, TMS op) {
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  TValue tempb, tempc;
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  const TValue *b, *c;
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  if ((b = luaV_tonumber(rb, &tempb)) != NULL &&
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      (c = luaV_tonumber(rc, &tempc)) != NULL) {
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    lua_Number nb = nvalue(b), nc = nvalue(c);
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   320
    switch (op) {
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      case TM_ADD: setnvalue(ra, luai_numadd(nb, nc)); break;
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      case TM_SUB: setnvalue(ra, luai_numsub(nb, nc)); break;
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      case TM_MUL: setnvalue(ra, luai_nummul(nb, nc)); break;
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      case TM_DIV: setnvalue(ra, luai_numdiv(nb, nc)); break;
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      case TM_MOD: setnvalue(ra, luai_nummod(nb, nc)); break;
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      case TM_POW: setnvalue(ra, luai_numpow(nb, nc)); break;
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   327
      case TM_UNM: setnvalue(ra, luai_numunm(nb)); break;
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   328
      default: lua_assert(0); break;
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   329
    }
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   330
  }
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   331
  else if (!call_binTM(L, rb, rc, ra, op))
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   332
    luaG_aritherror(L, rb, rc);
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   333
}
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   334
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   335
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   336
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/*
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** some macros for common tasks in `luaV_execute'
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*/
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   340
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#define runtime_check(L, c) { if (!(c)) break; }
2812
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#define RA(i)   (base+GETARG_A(i))
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/* to be used after possible stack reallocation */
10017
de822cd3df3a fixwhitespace and dos2unix
koda
parents: 3697
diff changeset
   345
#define RB(i)   check_exp(getBMode(GET_OPCODE(i)) == OpArgR, base+GETARG_B(i))
de822cd3df3a fixwhitespace and dos2unix
koda
parents: 3697
diff changeset
   346
#define RC(i)   check_exp(getCMode(GET_OPCODE(i)) == OpArgR, base+GETARG_C(i))
de822cd3df3a fixwhitespace and dos2unix
koda
parents: 3697
diff changeset
   347
#define RKB(i)  check_exp(getBMode(GET_OPCODE(i)) == OpArgK, \
de822cd3df3a fixwhitespace and dos2unix
koda
parents: 3697
diff changeset
   348
    ISK(GETARG_B(i)) ? k+INDEXK(GETARG_B(i)) : base+GETARG_B(i))
de822cd3df3a fixwhitespace and dos2unix
koda
parents: 3697
diff changeset
   349
#define RKC(i)  check_exp(getCMode(GET_OPCODE(i)) == OpArgK, \
de822cd3df3a fixwhitespace and dos2unix
koda
parents: 3697
diff changeset
   350
    ISK(GETARG_C(i)) ? k+INDEXK(GETARG_C(i)) : base+GETARG_C(i))
de822cd3df3a fixwhitespace and dos2unix
koda
parents: 3697
diff changeset
   351
#define KBx(i)  check_exp(getBMode(GET_OPCODE(i)) == OpArgK, k+GETARG_Bx(i))
2812
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   352
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   353
10017
de822cd3df3a fixwhitespace and dos2unix
koda
parents: 3697
diff changeset
   354
#define dojump(L,pc,i)  {(pc) += (i); luai_threadyield(L);}
2812
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   355
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   356
10017
de822cd3df3a fixwhitespace and dos2unix
koda
parents: 3697
diff changeset
   357
#define Protect(x)  { L->savedpc = pc; {x;}; base = L->base; }
2812
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   358
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   359
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   360
#define arith_op(op,tm) { \
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   361
        TValue *rb = RKB(i); \
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   362
        TValue *rc = RKC(i); \
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   363
        if (ttisnumber(rb) && ttisnumber(rc)) { \
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   364
          lua_Number nb = nvalue(rb), nc = nvalue(rc); \
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   365
          setnvalue(ra, op(nb, nc)); \
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   366
        } \
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   367
        else \
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   368
          Protect(Arith(L, ra, rb, rc, tm)); \
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   369
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   370
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   371
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   372
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   373
void luaV_execute (lua_State *L, int nexeccalls) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   374
  LClosure *cl;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   375
  StkId base;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   376
  TValue *k;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   377
  const Instruction *pc;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   378
 reentry:  /* entry point */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   379
  lua_assert(isLua(L->ci));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   380
  pc = L->savedpc;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   381
  cl = &clvalue(L->ci->func)->l;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   382
  base = L->base;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   383
  k = cl->p->k;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   384
  /* main loop of interpreter */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   385
  for (;;) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   386
    const Instruction i = *pc++;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   387
    StkId ra;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   388
    if ((L->hookmask & (LUA_MASKLINE | LUA_MASKCOUNT)) &&
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   389
        (--L->hookcount == 0 || L->hookmask & LUA_MASKLINE)) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   390
      traceexec(L, pc);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   391
      if (L->status == LUA_YIELD) {  /* did hook yield? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   392
        L->savedpc = pc - 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   393
        return;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   394
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   395
      base = L->base;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   396
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   397
    /* warning!! several calls may realloc the stack and invalidate `ra' */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   398
    ra = RA(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   399
    lua_assert(base == L->base && L->base == L->ci->base);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   400
    lua_assert(base <= L->top && L->top <= L->stack + L->stacksize);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   401
    lua_assert(L->top == L->ci->top || luaG_checkopenop(i));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   402
    switch (GET_OPCODE(i)) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   403
      case OP_MOVE: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   404
        setobjs2s(L, ra, RB(i));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   405
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   406
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   407
      case OP_LOADK: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   408
        setobj2s(L, ra, KBx(i));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   409
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   410
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   411
      case OP_LOADBOOL: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   412
        setbvalue(ra, GETARG_B(i));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   413
        if (GETARG_C(i)) pc++;  /* skip next instruction (if C) */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   414
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   415
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   416
      case OP_LOADNIL: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   417
        TValue *rb = RB(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   418
        do {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   419
          setnilvalue(rb--);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   420
        } while (rb >= ra);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   421
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   422
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   423
      case OP_GETUPVAL: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   424
        int b = GETARG_B(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   425
        setobj2s(L, ra, cl->upvals[b]->v);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   426
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   427
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   428
      case OP_GETGLOBAL: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   429
        TValue g;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   430
        TValue *rb = KBx(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   431
        sethvalue(L, &g, cl->env);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   432
        lua_assert(ttisstring(rb));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   433
        Protect(luaV_gettable(L, &g, rb, ra));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   434
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   435
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   436
      case OP_GETTABLE: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   437
        Protect(luaV_gettable(L, RB(i), RKC(i), ra));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   438
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   439
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   440
      case OP_SETGLOBAL: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   441
        TValue g;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   442
        sethvalue(L, &g, cl->env);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   443
        lua_assert(ttisstring(KBx(i)));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   444
        Protect(luaV_settable(L, &g, KBx(i), ra));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   445
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   446
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   447
      case OP_SETUPVAL: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   448
        UpVal *uv = cl->upvals[GETARG_B(i)];
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   449
        setobj(L, uv->v, ra);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   450
        luaC_barrier(L, uv, ra);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   451
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   452
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   453
      case OP_SETTABLE: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   454
        Protect(luaV_settable(L, ra, RKB(i), RKC(i)));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   455
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   456
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   457
      case OP_NEWTABLE: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   458
        int b = GETARG_B(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   459
        int c = GETARG_C(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   460
        sethvalue(L, ra, luaH_new(L, luaO_fb2int(b), luaO_fb2int(c)));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   461
        Protect(luaC_checkGC(L));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   462
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   463
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   464
      case OP_SELF: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   465
        StkId rb = RB(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   466
        setobjs2s(L, ra+1, rb);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   467
        Protect(luaV_gettable(L, rb, RKC(i), ra));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   468
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   469
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   470
      case OP_ADD: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   471
        arith_op(luai_numadd, TM_ADD);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   472
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   473
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   474
      case OP_SUB: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   475
        arith_op(luai_numsub, TM_SUB);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   476
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   477
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   478
      case OP_MUL: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   479
        arith_op(luai_nummul, TM_MUL);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   480
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   481
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   482
      case OP_DIV: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   483
        arith_op(luai_numdiv, TM_DIV);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   484
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   485
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   486
      case OP_MOD: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   487
        arith_op(luai_nummod, TM_MOD);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   488
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   489
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   490
      case OP_POW: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   491
        arith_op(luai_numpow, TM_POW);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   492
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   493
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   494
      case OP_UNM: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   495
        TValue *rb = RB(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   496
        if (ttisnumber(rb)) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   497
          lua_Number nb = nvalue(rb);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   498
          setnvalue(ra, luai_numunm(nb));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   499
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   500
        else {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   501
          Protect(Arith(L, ra, rb, rb, TM_UNM));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   502
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   503
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   504
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   505
      case OP_NOT: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   506
        int res = l_isfalse(RB(i));  /* next assignment may change this value */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   507
        setbvalue(ra, res);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   508
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   509
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   510
      case OP_LEN: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   511
        const TValue *rb = RB(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   512
        switch (ttype(rb)) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   513
          case LUA_TTABLE: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   514
            setnvalue(ra, cast_num(luaH_getn(hvalue(rb))));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   515
            break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   516
          }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   517
          case LUA_TSTRING: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   518
            setnvalue(ra, cast_num(tsvalue(rb)->len));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   519
            break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   520
          }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   521
          default: {  /* try metamethod */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   522
            Protect(
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   523
              if (!call_binTM(L, rb, luaO_nilobject, ra, TM_LEN))
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   524
                luaG_typeerror(L, rb, "get length of");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   525
            )
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   526
          }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   527
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   528
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   529
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   530
      case OP_CONCAT: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   531
        int b = GETARG_B(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   532
        int c = GETARG_C(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   533
        Protect(luaV_concat(L, c-b+1, c); luaC_checkGC(L));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   534
        setobjs2s(L, RA(i), base+b);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   535
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   536
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   537
      case OP_JMP: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   538
        dojump(L, pc, GETARG_sBx(i));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   539
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   540
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   541
      case OP_EQ: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   542
        TValue *rb = RKB(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   543
        TValue *rc = RKC(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   544
        Protect(
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   545
          if (equalobj(L, rb, rc) == GETARG_A(i))
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   546
            dojump(L, pc, GETARG_sBx(*pc));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   547
        )
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   548
        pc++;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   549
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   550
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   551
      case OP_LT: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   552
        Protect(
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   553
          if (luaV_lessthan(L, RKB(i), RKC(i)) == GETARG_A(i))
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   554
            dojump(L, pc, GETARG_sBx(*pc));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   555
        )
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   556
        pc++;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   557
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   558
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   559
      case OP_LE: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   560
        Protect(
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   561
          if (lessequal(L, RKB(i), RKC(i)) == GETARG_A(i))
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   562
            dojump(L, pc, GETARG_sBx(*pc));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   563
        )
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   564
        pc++;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   565
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   566
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   567
      case OP_TEST: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   568
        if (l_isfalse(ra) != GETARG_C(i))
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   569
          dojump(L, pc, GETARG_sBx(*pc));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   570
        pc++;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   571
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   572
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   573
      case OP_TESTSET: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   574
        TValue *rb = RB(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   575
        if (l_isfalse(rb) != GETARG_C(i)) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   576
          setobjs2s(L, ra, rb);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   577
          dojump(L, pc, GETARG_sBx(*pc));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   578
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   579
        pc++;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   580
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   581
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   582
      case OP_CALL: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   583
        int b = GETARG_B(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   584
        int nresults = GETARG_C(i) - 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   585
        if (b != 0) L->top = ra+b;  /* else previous instruction set top */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   586
        L->savedpc = pc;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   587
        switch (luaD_precall(L, ra, nresults)) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   588
          case PCRLUA: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   589
            nexeccalls++;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   590
            goto reentry;  /* restart luaV_execute over new Lua function */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   591
          }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   592
          case PCRC: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   593
            /* it was a C function (`precall' called it); adjust results */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   594
            if (nresults >= 0) L->top = L->ci->top;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   595
            base = L->base;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   596
            continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   597
          }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   598
          default: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   599
            return;  /* yield */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   600
          }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   601
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   602
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   603
      case OP_TAILCALL: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   604
        int b = GETARG_B(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   605
        if (b != 0) L->top = ra+b;  /* else previous instruction set top */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   606
        L->savedpc = pc;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   607
        lua_assert(GETARG_C(i) - 1 == LUA_MULTRET);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   608
        switch (luaD_precall(L, ra, LUA_MULTRET)) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   609
          case PCRLUA: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   610
            /* tail call: put new frame in place of previous one */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   611
            CallInfo *ci = L->ci - 1;  /* previous frame */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   612
            int aux;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   613
            StkId func = ci->func;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   614
            StkId pfunc = (ci+1)->func;  /* previous function index */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   615
            if (L->openupval) luaF_close(L, ci->base);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   616
            L->base = ci->base = ci->func + ((ci+1)->base - pfunc);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   617
            for (aux = 0; pfunc+aux < L->top; aux++)  /* move frame down */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   618
              setobjs2s(L, func+aux, pfunc+aux);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   619
            ci->top = L->top = func+aux;  /* correct top */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   620
            lua_assert(L->top == L->base + clvalue(func)->l.p->maxstacksize);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   621
            ci->savedpc = L->savedpc;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   622
            ci->tailcalls++;  /* one more call lost */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   623
            L->ci--;  /* remove new frame */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   624
            goto reentry;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   625
          }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   626
          case PCRC: {  /* it was a C function (`precall' called it) */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   627
            base = L->base;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   628
            continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   629
          }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   630
          default: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   631
            return;  /* yield */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   632
          }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   633
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   634
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   635
      case OP_RETURN: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   636
        int b = GETARG_B(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   637
        if (b != 0) L->top = ra+b-1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   638
        if (L->openupval) luaF_close(L, base);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   639
        L->savedpc = pc;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   640
        b = luaD_poscall(L, ra);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   641
        if (--nexeccalls == 0)  /* was previous function running `here'? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   642
          return;  /* no: return */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   643
        else {  /* yes: continue its execution */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   644
          if (b) L->top = L->ci->top;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   645
          lua_assert(isLua(L->ci));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   646
          lua_assert(GET_OPCODE(*((L->ci)->savedpc - 1)) == OP_CALL);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   647
          goto reentry;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   648
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   649
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   650
      case OP_FORLOOP: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   651
        lua_Number step = nvalue(ra+2);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   652
        lua_Number idx = luai_numadd(nvalue(ra), step); /* increment index */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   653
        lua_Number limit = nvalue(ra+1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   654
        if (luai_numlt(0, step) ? luai_numle(idx, limit)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   655
                                : luai_numle(limit, idx)) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   656
          dojump(L, pc, GETARG_sBx(i));  /* jump back */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   657
          setnvalue(ra, idx);  /* update internal index... */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   658
          setnvalue(ra+3, idx);  /* ...and external index */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   659
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   660
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   661
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   662
      case OP_FORPREP: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   663
        const TValue *init = ra;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   664
        const TValue *plimit = ra+1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   665
        const TValue *pstep = ra+2;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   666
        L->savedpc = pc;  /* next steps may throw errors */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   667
        if (!tonumber(init, ra))
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   668
          luaG_runerror(L, LUA_QL("for") " initial value must be a number");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   669
        else if (!tonumber(plimit, ra+1))
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   670
          luaG_runerror(L, LUA_QL("for") " limit must be a number");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   671
        else if (!tonumber(pstep, ra+2))
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   672
          luaG_runerror(L, LUA_QL("for") " step must be a number");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   673
        setnvalue(ra, luai_numsub(nvalue(ra), nvalue(pstep)));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   674
        dojump(L, pc, GETARG_sBx(i));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   675
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   676
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   677
      case OP_TFORLOOP: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   678
        StkId cb = ra + 3;  /* call base */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   679
        setobjs2s(L, cb+2, ra+2);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   680
        setobjs2s(L, cb+1, ra+1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   681
        setobjs2s(L, cb, ra);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   682
        L->top = cb+3;  /* func. + 2 args (state and index) */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   683
        Protect(luaD_call(L, cb, GETARG_C(i)));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   684
        L->top = L->ci->top;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   685
        cb = RA(i) + 3;  /* previous call may change the stack */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   686
        if (!ttisnil(cb)) {  /* continue loop? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   687
          setobjs2s(L, cb-1, cb);  /* save control variable */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   688
          dojump(L, pc, GETARG_sBx(*pc));  /* jump back */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   689
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   690
        pc++;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   691
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   692
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   693
      case OP_SETLIST: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   694
        int n = GETARG_B(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   695
        int c = GETARG_C(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   696
        int last;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   697
        Table *h;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   698
        if (n == 0) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   699
          n = cast_int(L->top - ra) - 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   700
          L->top = L->ci->top;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   701
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   702
        if (c == 0) c = cast_int(*pc++);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   703
        runtime_check(L, ttistable(ra));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   704
        h = hvalue(ra);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   705
        last = ((c-1)*LFIELDS_PER_FLUSH) + n;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   706
        if (last > h->sizearray)  /* needs more space? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   707
          luaH_resizearray(L, h, last);  /* pre-alloc it at once */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   708
        for (; n > 0; n--) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   709
          TValue *val = ra+n;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   710
          setobj2t(L, luaH_setnum(L, h, last--), val);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   711
          luaC_barriert(L, h, val);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   712
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   713
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   714
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   715
      case OP_CLOSE: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   716
        luaF_close(L, ra);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   717
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   718
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   719
      case OP_CLOSURE: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   720
        Proto *p;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   721
        Closure *ncl;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   722
        int nup, j;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   723
        p = cl->p->p[GETARG_Bx(i)];
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   724
        nup = p->nups;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   725
        ncl = luaF_newLclosure(L, nup, cl->env);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   726
        ncl->l.p = p;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   727
        for (j=0; j<nup; j++, pc++) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   728
          if (GET_OPCODE(*pc) == OP_GETUPVAL)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   729
            ncl->l.upvals[j] = cl->upvals[GETARG_B(*pc)];
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   730
          else {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   731
            lua_assert(GET_OPCODE(*pc) == OP_MOVE);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   732
            ncl->l.upvals[j] = luaF_findupval(L, base + GETARG_B(*pc));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   733
          }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   734
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   735
        setclvalue(L, ra, ncl);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   736
        Protect(luaC_checkGC(L));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   737
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   738
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   739
      case OP_VARARG: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   740
        int b = GETARG_B(i) - 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   741
        int j;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   742
        CallInfo *ci = L->ci;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   743
        int n = cast_int(ci->base - ci->func) - cl->p->numparams - 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   744
        if (b == LUA_MULTRET) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   745
          Protect(luaD_checkstack(L, n));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   746
          ra = RA(i);  /* previous call may change the stack */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   747
          b = n;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   748
          L->top = ra + n;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   749
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   750
        for (j = 0; j < b; j++) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   751
          if (j < n) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   752
            setobjs2s(L, ra + j, ci->base - n + j);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   753
          }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   754
          else {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   755
            setnilvalue(ra + j);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   756
          }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   757
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   758
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   759
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   760
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   761
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   762
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   763