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00008 #include <stdio.h>
00009 #include <stdlib.h>
00010 #include <string.h>
00011
00012 #define lvm_c
00013 #define LUA_CORE
00014
00015 #include "lua.h"
00016
00017 #include "ldebug.h"
00018 #include "ldo.h"
00019 #include "lfunc.h"
00020 #include "lgc.h"
00021 #include "lobject.h"
00022 #include "lopcodes.h"
00023 #include "lstate.h"
00024 #include "lstring.h"
00025 #include "ltable.h"
00026 #include "ltm.h"
00027 #include "lvm.h"
00028
00029
00030
00031
00032 #define MAXTAGLOOP 100
00033
00034
00035 const TValue *luaV_tonumber (const TValue *obj, TValue *n) {
00036 lua_Number num;
00037 if (ttisnumber(obj)) return obj;
00038 if (ttisstring(obj) && luaO_str2d(svalue(obj), &num)) {
00039 setnvalue(n, num);
00040 return n;
00041 }
00042 else
00043 return NULL;
00044 }
00045
00046
00047 int luaV_tostring (lua_State *L, StkId obj) {
00048 if (!ttisnumber(obj))
00049 return 0;
00050 else {
00051 char s[LUAI_MAXNUMBER2STR];
00052 lua_Number n = nvalue(obj);
00053 lua_number2str(s, n);
00054 setsvalue2s(L, obj, luaS_new(L, s));
00055 return 1;
00056 }
00057 }
00058
00059
00060 static void traceexec (lua_State *L, const Instruction *pc) {
00061 lu_byte mask = L->hookmask;
00062 const Instruction *oldpc = L->savedpc;
00063 L->savedpc = pc;
00064 if ((mask & LUA_MASKCOUNT) && L->hookcount == 0) {
00065 resethookcount(L);
00066 luaD_callhook(L, LUA_HOOKCOUNT, -1);
00067 }
00068 if (mask & LUA_MASKLINE) {
00069 Proto *p = ci_func(L->ci)->l.p;
00070 int npc = pcRel(pc, p);
00071 int newline = getline(p, npc);
00072
00073
00074 if (npc == 0 || pc <= oldpc || newline != getline(p, pcRel(oldpc, p)))
00075 luaD_callhook(L, LUA_HOOKLINE, newline);
00076 }
00077 }
00078
00079
00080 static void callTMres (lua_State *L, StkId res, const TValue *f,
00081 const TValue *p1, const TValue *p2) {
00082 ptrdiff_t result = savestack(L, res);
00083 setobj2s(L, L->top, f);
00084 setobj2s(L, L->top+1, p1);
00085 setobj2s(L, L->top+2, p2);
00086 luaD_checkstack(L, 3);
00087 L->top += 3;
00088 luaD_call(L, L->top - 3, 1);
00089 res = restorestack(L, result);
00090 L->top--;
00091 setobjs2s(L, res, L->top);
00092 }
00093
00094
00095
00096 static void callTM (lua_State *L, const TValue *f, const TValue *p1,
00097 const TValue *p2, const TValue *p3) {
00098 setobj2s(L, L->top, f);
00099 setobj2s(L, L->top+1, p1);
00100 setobj2s(L, L->top+2, p2);
00101 setobj2s(L, L->top+3, p3);
00102 luaD_checkstack(L, 4);
00103 L->top += 4;
00104 luaD_call(L, L->top - 4, 0);
00105 }
00106
00107
00108 void luaV_gettable (lua_State *L, const TValue *t, TValue *key, StkId val) {
00109 int loop;
00110 for (loop = 0; loop < MAXTAGLOOP; loop++) {
00111 const TValue *tm;
00112 if (ttistable(t)) {
00113 Table *h = hvalue(t);
00114 const TValue *res = luaH_get(h, key);
00115 if (!ttisnil(res) ||
00116 (tm = fasttm(L, h->metatable, TM_INDEX)) == NULL) {
00117 setobj2s(L, val, res);
00118 return;
00119 }
00120
00121 }
00122 else if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_INDEX)))
00123 luaG_typeerror(L, t, "index");
00124 if (ttisfunction(tm)) {
00125 callTMres(L, val, tm, t, key);
00126 return;
00127 }
00128 t = tm;
00129 }
00130 luaG_runerror(L, "loop in gettable");
00131 }
00132
00133
00134 void luaV_settable (lua_State *L, const TValue *t, TValue *key, StkId val) {
00135 int loop;
00136 for (loop = 0; loop < MAXTAGLOOP; loop++) {
00137 const TValue *tm;
00138 if (ttistable(t)) {
00139 Table *h = hvalue(t);
00140 TValue *oldval = luaH_set(L, h, key);
00141 if (!ttisnil(oldval) ||
00142 (tm = fasttm(L, h->metatable, TM_NEWINDEX)) == NULL) {
00143 setobj2t(L, oldval, val);
00144 luaC_barriert(L, h, val);
00145 return;
00146 }
00147
00148 }
00149 else if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_NEWINDEX)))
00150 luaG_typeerror(L, t, "index");
00151 if (ttisfunction(tm)) {
00152 callTM(L, tm, t, key, val);
00153 return;
00154 }
00155 t = tm;
00156 }
00157 luaG_runerror(L, "loop in settable");
00158 }
00159
00160
00161 static int call_binTM (lua_State *L, const TValue *p1, const TValue *p2,
00162 StkId res, TMS event) {
00163 const TValue *tm = luaT_gettmbyobj(L, p1, event);
00164 if (ttisnil(tm))
00165 tm = luaT_gettmbyobj(L, p2, event);
00166 if (ttisnil(tm)) return 0;
00167 callTMres(L, res, tm, p1, p2);
00168 return 1;
00169 }
00170
00171
00172 static const TValue *get_compTM (lua_State *L, Table *mt1, Table *mt2,
00173 TMS event) {
00174 const TValue *tm1 = fasttm(L, mt1, event);
00175 const TValue *tm2;
00176 if (tm1 == NULL) return NULL;
00177 if (mt1 == mt2) return tm1;
00178 tm2 = fasttm(L, mt2, event);
00179 if (tm2 == NULL) return NULL;
00180 if (luaO_rawequalObj(tm1, tm2))
00181 return tm1;
00182 return NULL;
00183 }
00184
00185
00186 static int call_orderTM (lua_State *L, const TValue *p1, const TValue *p2,
00187 TMS event) {
00188 const TValue *tm1 = luaT_gettmbyobj(L, p1, event);
00189 const TValue *tm2;
00190 if (ttisnil(tm1)) return -1;
00191 tm2 = luaT_gettmbyobj(L, p2, event);
00192 if (!luaO_rawequalObj(tm1, tm2))
00193 return -1;
00194 callTMres(L, L->top, tm1, p1, p2);
00195 return !l_isfalse(L->top);
00196 }
00197
00198
00199 static int l_strcmp (const TString *ls, const TString *rs) {
00200 const char *l = getstr(ls);
00201 size_t ll = ls->tsv.len;
00202 const char *r = getstr(rs);
00203 size_t lr = rs->tsv.len;
00204 for (;;) {
00205 int temp = strcoll(l, r);
00206 if (temp != 0) return temp;
00207 else {
00208 size_t len = strlen(l);
00209 if (len == lr)
00210 return (len == ll) ? 0 : 1;
00211 else if (len == ll)
00212 return -1;
00213
00214 len++;
00215 l += len; ll -= len; r += len; lr -= len;
00216 }
00217 }
00218 }
00219
00220
00221 int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r) {
00222 int res;
00223 if (ttype(l) != ttype(r))
00224 return luaG_ordererror(L, l, r);
00225 else if (ttisnumber(l))
00226 return luai_numlt(nvalue(l), nvalue(r));
00227 else if (ttisstring(l))
00228 return l_strcmp(rawtsvalue(l), rawtsvalue(r)) < 0;
00229 else if ((res = call_orderTM(L, l, r, TM_LT)) != -1)
00230 return res;
00231 return luaG_ordererror(L, l, r);
00232 }
00233
00234
00235 static int lessequal (lua_State *L, const TValue *l, const TValue *r) {
00236 int res;
00237 if (ttype(l) != ttype(r))
00238 return luaG_ordererror(L, l, r);
00239 else if (ttisnumber(l))
00240 return luai_numle(nvalue(l), nvalue(r));
00241 else if (ttisstring(l))
00242 return l_strcmp(rawtsvalue(l), rawtsvalue(r)) <= 0;
00243 else if ((res = call_orderTM(L, l, r, TM_LE)) != -1)
00244 return res;
00245 else if ((res = call_orderTM(L, r, l, TM_LT)) != -1)
00246 return !res;
00247 return luaG_ordererror(L, l, r);
00248 }
00249
00250
00251 int luaV_equalval (lua_State *L, const TValue *t1, const TValue *t2) {
00252 const TValue *tm;
00253 lua_assert(ttype(t1) == ttype(t2));
00254 switch (ttype(t1)) {
00255 case LUA_TNIL: return 1;
00256 case LUA_TNUMBER: return luai_numeq(nvalue(t1), nvalue(t2));
00257 case LUA_TBOOLEAN: return bvalue(t1) == bvalue(t2);
00258 case LUA_TLIGHTUSERDATA: return pvalue(t1) == pvalue(t2);
00259 case LUA_TUSERDATA: {
00260 if (uvalue(t1) == uvalue(t2)) return 1;
00261 tm = get_compTM(L, uvalue(t1)->metatable, uvalue(t2)->metatable,
00262 TM_EQ);
00263 break;
00264 }
00265 case LUA_TTABLE: {
00266 if (hvalue(t1) == hvalue(t2)) return 1;
00267 tm = get_compTM(L, hvalue(t1)->metatable, hvalue(t2)->metatable, TM_EQ);
00268 break;
00269 }
00270 default: return gcvalue(t1) == gcvalue(t2);
00271 }
00272 if (tm == NULL) return 0;
00273 callTMres(L, L->top, tm, t1, t2);
00274 return !l_isfalse(L->top);
00275 }
00276
00277
00278 void luaV_concat (lua_State *L, int total, int last) {
00279 do {
00280 StkId top = L->base + last + 1;
00281 int n = 2;
00282 if (!(ttisstring(top-2) || ttisnumber(top-2)) || !tostring(L, top-1)) {
00283 if (!call_binTM(L, top-2, top-1, top-2, TM_CONCAT))
00284 luaG_concaterror(L, top-2, top-1);
00285 } else if (tsvalue(top-1)->len == 0)
00286 (void)tostring(L, top - 2);
00287 else {
00288
00289 size_t tl = tsvalue(top-1)->len;
00290 char *buffer;
00291 int i;
00292
00293 for (n = 1; n < total && tostring(L, top-n-1); n++) {
00294 size_t l = tsvalue(top-n-1)->len;
00295 if (l >= MAX_SIZET - tl) luaG_runerror(L, "string length overflow");
00296 tl += l;
00297 }
00298 buffer = luaZ_openspace(L, &G(L)->buff, tl);
00299 tl = 0;
00300 for (i=n; i>0; i--) {
00301 size_t l = tsvalue(top-i)->len;
00302 memcpy(buffer+tl, svalue(top-i), l);
00303 tl += l;
00304 }
00305 setsvalue2s(L, top-n, luaS_newlstr(L, buffer, tl));
00306 }
00307 total -= n-1;
00308 last -= n-1;
00309 } while (total > 1);
00310 }
00311
00312
00313 static void Arith (lua_State *L, StkId ra, const TValue *rb,
00314 const TValue *rc, TMS op) {
00315 TValue tempb, tempc;
00316 const TValue *b, *c;
00317 if ((b = luaV_tonumber(rb, &tempb)) != NULL &&
00318 (c = luaV_tonumber(rc, &tempc)) != NULL) {
00319 lua_Number nb = nvalue(b), nc = nvalue(c);
00320 switch (op) {
00321 case TM_ADD: setnvalue(ra, luai_numadd(nb, nc)); break;
00322 case TM_SUB: setnvalue(ra, luai_numsub(nb, nc)); break;
00323 case TM_MUL: setnvalue(ra, luai_nummul(nb, nc)); break;
00324 case TM_DIV: setnvalue(ra, luai_numdiv(nb, nc)); break;
00325 case TM_MOD: setnvalue(ra, luai_nummod(nb, nc)); break;
00326 case TM_POW: setnvalue(ra, luai_numpow(nb, nc)); break;
00327 case TM_UNM: setnvalue(ra, luai_numunm(nb)); break;
00328 default: lua_assert(0); break;
00329 }
00330 }
00331 else if (!call_binTM(L, rb, rc, ra, op))
00332 luaG_aritherror(L, rb, rc);
00333 }
00334
00335
00336
00337
00338
00339
00340
00341 #define runtime_check(L, c) { if (!(c)) break; }
00342
00343 #define RA(i) (base+GETARG_A(i))
00344
00345 #define RB(i) check_exp(getBMode(GET_OPCODE(i)) == OpArgR, base+GETARG_B(i))
00346 #define RC(i) check_exp(getCMode(GET_OPCODE(i)) == OpArgR, base+GETARG_C(i))
00347 #define RKB(i) check_exp(getBMode(GET_OPCODE(i)) == OpArgK, \
00348 ISK(GETARG_B(i)) ? k+INDEXK(GETARG_B(i)) : base+GETARG_B(i))
00349 #define RKC(i) check_exp(getCMode(GET_OPCODE(i)) == OpArgK, \
00350 ISK(GETARG_C(i)) ? k+INDEXK(GETARG_C(i)) : base+GETARG_C(i))
00351 #define KBx(i) check_exp(getBMode(GET_OPCODE(i)) == OpArgK, k+GETARG_Bx(i))
00352
00353
00354 #define dojump(L,pc,i) {(pc) += (i); luai_threadyield(L);}
00355
00356
00357 #define Protect(x) { L->savedpc = pc; {x;}; base = L->base; }
00358
00359
00360 #define arith_op(op,tm) { \
00361 TValue *rb = RKB(i); \
00362 TValue *rc = RKC(i); \
00363 if (ttisnumber(rb) && ttisnumber(rc)) { \
00364 lua_Number nb = nvalue(rb), nc = nvalue(rc); \
00365 setnvalue(ra, op(nb, nc)); \
00366 } \
00367 else \
00368 Protect(Arith(L, ra, rb, rc, tm)); \
00369 }
00370
00371
00372
00373 void luaV_execute (lua_State *L, int nexeccalls) {
00374 LClosure *cl;
00375 StkId base;
00376 TValue *k;
00377 const Instruction *pc;
00378 reentry:
00379 lua_assert(isLua(L->ci));
00380 pc = L->savedpc;
00381 cl = &clvalue(L->ci->func)->l;
00382 base = L->base;
00383 k = cl->p->k;
00384
00385 for (;;) {
00386 const Instruction i = *pc++;
00387 StkId ra;
00388 if ((L->hookmask & (LUA_MASKLINE | LUA_MASKCOUNT)) &&
00389 (--L->hookcount == 0 || L->hookmask & LUA_MASKLINE)) {
00390 traceexec(L, pc);
00391 if (L->status == LUA_YIELD) {
00392 L->savedpc = pc - 1;
00393 return;
00394 }
00395 base = L->base;
00396 }
00397
00398 ra = RA(i);
00399 lua_assert(base == L->base && L->base == L->ci->base);
00400 lua_assert(base <= L->top && L->top <= L->stack + L->stacksize);
00401 lua_assert(L->top == L->ci->top || luaG_checkopenop(i));
00402 switch (GET_OPCODE(i)) {
00403 case OP_MOVE: {
00404 setobjs2s(L, ra, RB(i));
00405 continue;
00406 }
00407 case OP_LOADK: {
00408 setobj2s(L, ra, KBx(i));
00409 continue;
00410 }
00411 case OP_LOADBOOL: {
00412 setbvalue(ra, GETARG_B(i));
00413 if (GETARG_C(i)) pc++;
00414 continue;
00415 }
00416 case OP_LOADNIL: {
00417 TValue *rb = RB(i);
00418 do {
00419 setnilvalue(rb--);
00420 } while (rb >= ra);
00421 continue;
00422 }
00423 case OP_GETUPVAL: {
00424 int b = GETARG_B(i);
00425 setobj2s(L, ra, cl->upvals[b]->v);
00426 continue;
00427 }
00428 case OP_GETGLOBAL: {
00429 TValue g;
00430 TValue *rb = KBx(i);
00431 sethvalue(L, &g, cl->env);
00432 lua_assert(ttisstring(rb));
00433 Protect(luaV_gettable(L, &g, rb, ra));
00434 continue;
00435 }
00436 case OP_GETTABLE: {
00437 Protect(luaV_gettable(L, RB(i), RKC(i), ra));
00438 continue;
00439 }
00440 case OP_SETGLOBAL: {
00441 TValue g;
00442 sethvalue(L, &g, cl->env);
00443 lua_assert(ttisstring(KBx(i)));
00444 Protect(luaV_settable(L, &g, KBx(i), ra));
00445 continue;
00446 }
00447 case OP_SETUPVAL: {
00448 UpVal *uv = cl->upvals[GETARG_B(i)];
00449 setobj(L, uv->v, ra);
00450 luaC_barrier(L, uv, ra);
00451 continue;
00452 }
00453 case OP_SETTABLE: {
00454 Protect(luaV_settable(L, ra, RKB(i), RKC(i)));
00455 continue;
00456 }
00457 case OP_NEWTABLE: {
00458 int b = GETARG_B(i);
00459 int c = GETARG_C(i);
00460 sethvalue(L, ra, luaH_new(L, luaO_fb2int(b), luaO_fb2int(c)));
00461 Protect(luaC_checkGC(L));
00462 continue;
00463 }
00464 case OP_SELF: {
00465 StkId rb = RB(i);
00466 setobjs2s(L, ra+1, rb);
00467 Protect(luaV_gettable(L, rb, RKC(i), ra));
00468 continue;
00469 }
00470 case OP_ADD: {
00471 arith_op(luai_numadd, TM_ADD);
00472 continue;
00473 }
00474 case OP_SUB: {
00475 arith_op(luai_numsub, TM_SUB);
00476 continue;
00477 }
00478 case OP_MUL: {
00479 arith_op(luai_nummul, TM_MUL);
00480 continue;
00481 }
00482 case OP_DIV: {
00483 arith_op(luai_numdiv, TM_DIV);
00484 continue;
00485 }
00486 case OP_MOD: {
00487 arith_op(luai_nummod, TM_MOD);
00488 continue;
00489 }
00490 case OP_POW: {
00491 arith_op(luai_numpow, TM_POW);
00492 continue;
00493 }
00494 case OP_UNM: {
00495 TValue *rb = RB(i);
00496 if (ttisnumber(rb)) {
00497 lua_Number nb = nvalue(rb);
00498 setnvalue(ra, luai_numunm(nb));
00499 }
00500 else {
00501 Protect(Arith(L, ra, rb, rb, TM_UNM));
00502 }
00503 continue;
00504 }
00505 case OP_NOT: {
00506 int res = l_isfalse(RB(i));
00507 setbvalue(ra, res);
00508 continue;
00509 }
00510 case OP_LEN: {
00511 const TValue *rb = RB(i);
00512 switch (ttype(rb)) {
00513 case LUA_TTABLE: {
00514 setnvalue(ra, cast_num(luaH_getn(hvalue(rb))));
00515 break;
00516 }
00517 case LUA_TSTRING: {
00518 setnvalue(ra, cast_num(tsvalue(rb)->len));
00519 break;
00520 }
00521 default: {
00522 Protect(
00523 if (!call_binTM(L, rb, luaO_nilobject, ra, TM_LEN))
00524 luaG_typeerror(L, rb, "get length of");
00525 )
00526 }
00527 }
00528 continue;
00529 }
00530 case OP_CONCAT: {
00531 int b = GETARG_B(i);
00532 int c = GETARG_C(i);
00533 Protect(luaV_concat(L, c-b+1, c); luaC_checkGC(L));
00534 setobjs2s(L, RA(i), base+b);
00535 continue;
00536 }
00537 case OP_JMP: {
00538 dojump(L, pc, GETARG_sBx(i));
00539 continue;
00540 }
00541 case OP_EQ: {
00542 TValue *rb = RKB(i);
00543 TValue *rc = RKC(i);
00544 Protect(
00545 if (equalobj(L, rb, rc) == GETARG_A(i))
00546 dojump(L, pc, GETARG_sBx(*pc));
00547 )
00548 pc++;
00549 continue;
00550 }
00551 case OP_LT: {
00552 Protect(
00553 if (luaV_lessthan(L, RKB(i), RKC(i)) == GETARG_A(i))
00554 dojump(L, pc, GETARG_sBx(*pc));
00555 )
00556 pc++;
00557 continue;
00558 }
00559 case OP_LE: {
00560 Protect(
00561 if (lessequal(L, RKB(i), RKC(i)) == GETARG_A(i))
00562 dojump(L, pc, GETARG_sBx(*pc));
00563 )
00564 pc++;
00565 continue;
00566 }
00567 case OP_TEST: {
00568 if (l_isfalse(ra) != GETARG_C(i))
00569 dojump(L, pc, GETARG_sBx(*pc));
00570 pc++;
00571 continue;
00572 }
00573 case OP_TESTSET: {
00574 TValue *rb = RB(i);
00575 if (l_isfalse(rb) != GETARG_C(i)) {
00576 setobjs2s(L, ra, rb);
00577 dojump(L, pc, GETARG_sBx(*pc));
00578 }
00579 pc++;
00580 continue;
00581 }
00582 case OP_CALL: {
00583 int b = GETARG_B(i);
00584 int nresults = GETARG_C(i) - 1;
00585 if (b != 0) L->top = ra+b;
00586 L->savedpc = pc;
00587 switch (luaD_precall(L, ra, nresults)) {
00588 case PCRLUA: {
00589 nexeccalls++;
00590 goto reentry;
00591 }
00592 case PCRC: {
00593
00594 if (nresults >= 0) L->top = L->ci->top;
00595 base = L->base;
00596 continue;
00597 }
00598 default: {
00599 return;
00600 }
00601 }
00602 }
00603 case OP_TAILCALL: {
00604 int b = GETARG_B(i);
00605 if (b != 0) L->top = ra+b;
00606 L->savedpc = pc;
00607 lua_assert(GETARG_C(i) - 1 == LUA_MULTRET);
00608 switch (luaD_precall(L, ra, LUA_MULTRET)) {
00609 case PCRLUA: {
00610
00611 CallInfo *ci = L->ci - 1;
00612 int aux;
00613 StkId func = ci->func;
00614 StkId pfunc = (ci+1)->func;
00615 if (L->openupval) luaF_close(L, ci->base);
00616 L->base = ci->base = ci->func + ((ci+1)->base - pfunc);
00617 for (aux = 0; pfunc+aux < L->top; aux++)
00618 setobjs2s(L, func+aux, pfunc+aux);
00619 ci->top = L->top = func+aux;
00620 lua_assert(L->top == L->base + clvalue(func)->l.p->maxstacksize);
00621 ci->savedpc = L->savedpc;
00622 ci->tailcalls++;
00623 L->ci--;
00624 goto reentry;
00625 }
00626 case PCRC: {
00627 base = L->base;
00628 continue;
00629 }
00630 default: {
00631 return;
00632 }
00633 }
00634 }
00635 case OP_RETURN: {
00636 int b = GETARG_B(i);
00637 if (b != 0) L->top = ra+b-1;
00638 if (L->openupval) luaF_close(L, base);
00639 L->savedpc = pc;
00640 b = luaD_poscall(L, ra);
00641 if (--nexeccalls == 0)
00642 return;
00643 else {
00644 if (b) L->top = L->ci->top;
00645 lua_assert(isLua(L->ci));
00646 lua_assert(GET_OPCODE(*((L->ci)->savedpc - 1)) == OP_CALL);
00647 goto reentry;
00648 }
00649 }
00650 case OP_FORLOOP: {
00651 lua_Number step = nvalue(ra+2);
00652 lua_Number idx = luai_numadd(nvalue(ra), step);
00653 lua_Number limit = nvalue(ra+1);
00654 if (luai_numlt(0, step) ? luai_numle(idx, limit)
00655 : luai_numle(limit, idx)) {
00656 dojump(L, pc, GETARG_sBx(i));
00657 setnvalue(ra, idx);
00658 setnvalue(ra+3, idx);
00659 }
00660 continue;
00661 }
00662 case OP_FORPREP: {
00663 const TValue *init = ra;
00664 const TValue *plimit = ra+1;
00665 const TValue *pstep = ra+2;
00666 L->savedpc = pc;
00667 if (!tonumber(init, ra))
00668 luaG_runerror(L, LUA_QL("for") " initial value must be a number");
00669 else if (!tonumber(plimit, ra+1))
00670 luaG_runerror(L, LUA_QL("for") " limit must be a number");
00671 else if (!tonumber(pstep, ra+2))
00672 luaG_runerror(L, LUA_QL("for") " step must be a number");
00673 setnvalue(ra, luai_numsub(nvalue(ra), nvalue(pstep)));
00674 dojump(L, pc, GETARG_sBx(i));
00675 continue;
00676 }
00677 case OP_TFORLOOP: {
00678 StkId cb = ra + 3;
00679 setobjs2s(L, cb+2, ra+2);
00680 setobjs2s(L, cb+1, ra+1);
00681 setobjs2s(L, cb, ra);
00682 L->top = cb+3;
00683 Protect(luaD_call(L, cb, GETARG_C(i)));
00684 L->top = L->ci->top;
00685 cb = RA(i) + 3;
00686 if (!ttisnil(cb)) {
00687 setobjs2s(L, cb-1, cb);
00688 dojump(L, pc, GETARG_sBx(*pc));
00689 }
00690 pc++;
00691 continue;
00692 }
00693 case OP_SETLIST: {
00694 int n = GETARG_B(i);
00695 int c = GETARG_C(i);
00696 int last;
00697 Table *h;
00698 if (n == 0) {
00699 n = cast_int(L->top - ra) - 1;
00700 L->top = L->ci->top;
00701 }
00702 if (c == 0) c = cast_int(*pc++);
00703 runtime_check(L, ttistable(ra));
00704 h = hvalue(ra);
00705 last = ((c-1)*LFIELDS_PER_FLUSH) + n;
00706 if (last > h->sizearray)
00707 luaH_resizearray(L, h, last);
00708 for (; n > 0; n--) {
00709 TValue *val = ra+n;
00710 setobj2t(L, luaH_setnum(L, h, last--), val);
00711 luaC_barriert(L, h, val);
00712 }
00713 continue;
00714 }
00715 case OP_CLOSE: {
00716 luaF_close(L, ra);
00717 continue;
00718 }
00719 case OP_CLOSURE: {
00720 Proto *p;
00721 Closure *ncl;
00722 int nup, j;
00723 p = cl->p->p[GETARG_Bx(i)];
00724 nup = p->nups;
00725 ncl = luaF_newLclosure(L, nup, cl->env);
00726 ncl->l.p = p;
00727 for (j=0; j<nup; j++, pc++) {
00728 if (GET_OPCODE(*pc) == OP_GETUPVAL)
00729 ncl->l.upvals[j] = cl->upvals[GETARG_B(*pc)];
00730 else {
00731 lua_assert(GET_OPCODE(*pc) == OP_MOVE);
00732 ncl->l.upvals[j] = luaF_findupval(L, base + GETARG_B(*pc));
00733 }
00734 }
00735 setclvalue(L, ra, ncl);
00736 Protect(luaC_checkGC(L));
00737 continue;
00738 }
00739 case OP_VARARG: {
00740 int b = GETARG_B(i) - 1;
00741 int j;
00742 CallInfo *ci = L->ci;
00743 int n = cast_int(ci->base - ci->func) - cl->p->numparams - 1;
00744 if (b == LUA_MULTRET) {
00745 Protect(luaD_checkstack(L, n));
00746 ra = RA(i);
00747 b = n;
00748 L->top = ra + n;
00749 }
00750 for (j = 0; j < b; j++) {
00751 if (j < n) {
00752 setobjs2s(L, ra + j, ci->base - n + j);
00753 }
00754 else {
00755 setnilvalue(ra + j);
00756 }
00757 }
00758 continue;
00759 }
00760 }
00761 }
00762 }
00763