+++ /dev/null
-/*
-** $Id: lvm.c,v 2.63.1.5 2011/08/17 20:43:11 roberto Exp $
-** Lua virtual machine
-** See Copyright Notice in lua.h
-*/
-
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#define lvm_c
-#define LUA_CORE
-
-#include "lua.h"
-
-#include "ldebug.h"
-#include "ldo.h"
-#include "lfunc.h"
-#include "lgc.h"
-#include "lobject.h"
-#include "lopcodes.h"
-#include "lstate.h"
-#include "lstring.h"
-#include "ltable.h"
-#include "ltm.h"
-#include "lvm.h"
-
-
-
-/* limit for table tag-method chains (to avoid loops) */
-#define MAXTAGLOOP 100
-
-
-const TValue *luaV_tonumber (const TValue *obj, TValue *n) {
- lua_Number num;
- if (ttisnumber(obj)) return obj;
- if (ttisstring(obj) && luaO_str2d(svalue(obj), &num)) {
- setnvalue(n, num);
- return n;
- }
- else
- return NULL;
-}
-
-
-int luaV_tostring (lua_State *L, StkId obj) {
- if (!ttisnumber(obj))
- return 0;
- else {
- char s[LUAI_MAXNUMBER2STR];
- lua_Number n = nvalue(obj);
- lua_number2str(s, n);
- setsvalue2s(L, obj, luaS_new(L, s));
- return 1;
- }
-}
-
-
-static void traceexec (lua_State *L, const Instruction *pc) {
- lu_byte mask = L->hookmask;
- const Instruction *oldpc = L->savedpc;
- L->savedpc = pc;
- if ((mask & LUA_MASKCOUNT) && L->hookcount == 0) {
- resethookcount(L);
- luaD_callhook(L, LUA_HOOKCOUNT, -1);
- }
- if (mask & LUA_MASKLINE) {
- Proto *p = ci_func(L->ci)->l.p;
- int npc = pcRel(pc, p);
- int newline = getline(p, npc);
- /* call linehook when enter a new function, when jump back (loop),
- or when enter a new line */
- if (npc == 0 || pc <= oldpc || newline != getline(p, pcRel(oldpc, p)))
- luaD_callhook(L, LUA_HOOKLINE, newline);
- }
-}
-
-
-static void callTMres (lua_State *L, StkId res, const TValue *f,
- const TValue *p1, const TValue *p2) {
- ptrdiff_t result = savestack(L, res);
- setobj2s(L, L->top, f); /* push function */
- setobj2s(L, L->top+1, p1); /* 1st argument */
- setobj2s(L, L->top+2, p2); /* 2nd argument */
- luaD_checkstack(L, 3);
- L->top += 3;
- luaD_call(L, L->top - 3, 1);
- res = restorestack(L, result);
- L->top--;
- setobjs2s(L, res, L->top);
-}
-
-
-
-static void callTM (lua_State *L, const TValue *f, const TValue *p1,
- const TValue *p2, const TValue *p3) {
- setobj2s(L, L->top, f); /* push function */
- setobj2s(L, L->top+1, p1); /* 1st argument */
- setobj2s(L, L->top+2, p2); /* 2nd argument */
- setobj2s(L, L->top+3, p3); /* 3th argument */
- luaD_checkstack(L, 4);
- L->top += 4;
- luaD_call(L, L->top - 4, 0);
-}
-
-
-void luaV_gettable (lua_State *L, const TValue *t, TValue *key, StkId val) {
- int loop;
- for (loop = 0; loop < MAXTAGLOOP; loop++) {
- const TValue *tm;
- if (ttistable(t)) { /* `t' is a table? */
- Table *h = hvalue(t);
- const TValue *res = luaH_get(h, key); /* do a primitive get */
- if (!ttisnil(res) || /* result is no nil? */
- (tm = fasttm(L, h->metatable, TM_INDEX)) == NULL) { /* or no TM? */
- setobj2s(L, val, res);
- return;
- }
- /* else will try the tag method */
- }
- else if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_INDEX)))
- luaG_typeerror(L, t, "index");
- if (ttisfunction(tm)) {
- callTMres(L, val, tm, t, key);
- return;
- }
- t = tm; /* else repeat with `tm' */
- }
- luaG_runerror(L, "loop in gettable");
-}
-
-
-void luaV_settable (lua_State *L, const TValue *t, TValue *key, StkId val) {
- int loop;
- TValue temp;
- for (loop = 0; loop < MAXTAGLOOP; loop++) {
- const TValue *tm;
- if (ttistable(t)) { /* `t' is a table? */
- Table *h = hvalue(t);
- TValue *oldval = luaH_set(L, h, key); /* do a primitive set */
- if (!ttisnil(oldval) || /* result is no nil? */
- (tm = fasttm(L, h->metatable, TM_NEWINDEX)) == NULL) { /* or no TM? */
- setobj2t(L, oldval, val);
- h->flags = 0;
- luaC_barriert(L, h, val);
- return;
- }
- /* else will try the tag method */
- }
- else if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_NEWINDEX)))
- luaG_typeerror(L, t, "index");
- if (ttisfunction(tm)) {
- callTM(L, tm, t, key, val);
- return;
- }
- /* else repeat with `tm' */
- setobj(L, &temp, tm); /* avoid pointing inside table (may rehash) */
- t = &temp;
- }
- luaG_runerror(L, "loop in settable");
-}
-
-
-static int call_binTM (lua_State *L, const TValue *p1, const TValue *p2,
- StkId res, TMS event) {
- const TValue *tm = luaT_gettmbyobj(L, p1, event); /* try first operand */
- if (ttisnil(tm))
- tm = luaT_gettmbyobj(L, p2, event); /* try second operand */
- if (ttisnil(tm)) return 0;
- callTMres(L, res, tm, p1, p2);
- return 1;
-}
-
-
-static const TValue *get_compTM (lua_State *L, Table *mt1, Table *mt2,
- TMS event) {
- const TValue *tm1 = fasttm(L, mt1, event);
- const TValue *tm2;
- if (tm1 == NULL) return NULL; /* no metamethod */
- if (mt1 == mt2) return tm1; /* same metatables => same metamethods */
- tm2 = fasttm(L, mt2, event);
- if (tm2 == NULL) return NULL; /* no metamethod */
- if (luaO_rawequalObj(tm1, tm2)) /* same metamethods? */
- return tm1;
- return NULL;
-}
-
-
-static int call_orderTM (lua_State *L, const TValue *p1, const TValue *p2,
- TMS event) {
- const TValue *tm1 = luaT_gettmbyobj(L, p1, event);
- const TValue *tm2;
- if (ttisnil(tm1)) return -1; /* no metamethod? */
- tm2 = luaT_gettmbyobj(L, p2, event);
- if (!luaO_rawequalObj(tm1, tm2)) /* different metamethods? */
- return -1;
- callTMres(L, L->top, tm1, p1, p2);
- return !l_isfalse(L->top);
-}
-
-
-static int l_strcmp (const TString *ls, const TString *rs) {
- const char *l = getstr(ls);
- size_t ll = ls->tsv.len;
- const char *r = getstr(rs);
- size_t lr = rs->tsv.len;
- for (;;) {
- int temp = strcoll(l, r);
- if (temp != 0) return temp;
- else { /* strings are equal up to a `\0' */
- size_t len = strlen(l); /* index of first `\0' in both strings */
- if (len == lr) /* r is finished? */
- return (len == ll) ? 0 : 1;
- else if (len == ll) /* l is finished? */
- return -1; /* l is smaller than r (because r is not finished) */
- /* both strings longer than `len'; go on comparing (after the `\0') */
- len++;
- l += len; ll -= len; r += len; lr -= len;
- }
- }
-}
-
-
-int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r) {
- int res;
- if (ttype(l) != ttype(r))
- return luaG_ordererror(L, l, r);
- else if (ttisnumber(l))
- return luai_numlt(nvalue(l), nvalue(r));
- else if (ttisstring(l))
- return l_strcmp(rawtsvalue(l), rawtsvalue(r)) < 0;
- else if ((res = call_orderTM(L, l, r, TM_LT)) != -1)
- return res;
- return luaG_ordererror(L, l, r);
-}
-
-
-static int lessequal (lua_State *L, const TValue *l, const TValue *r) {
- int res;
- if (ttype(l) != ttype(r))
- return luaG_ordererror(L, l, r);
- else if (ttisnumber(l))
- return luai_numle(nvalue(l), nvalue(r));
- else if (ttisstring(l))
- return l_strcmp(rawtsvalue(l), rawtsvalue(r)) <= 0;
- else if ((res = call_orderTM(L, l, r, TM_LE)) != -1) /* first try `le' */
- return res;
- else if ((res = call_orderTM(L, r, l, TM_LT)) != -1) /* else try `lt' */
- return !res;
- return luaG_ordererror(L, l, r);
-}
-
-
-int luaV_equalval (lua_State *L, const TValue *t1, const TValue *t2) {
- const TValue *tm;
- lua_assert(ttype(t1) == ttype(t2));
- switch (ttype(t1)) {
- case LUA_TNIL: return 1;
- case LUA_TNUMBER: return luai_numeq(nvalue(t1), nvalue(t2));
- case LUA_TBOOLEAN: return bvalue(t1) == bvalue(t2); /* true must be 1 !! */
- case LUA_TLIGHTUSERDATA: return pvalue(t1) == pvalue(t2);
- case LUA_TUSERDATA: {
- if (uvalue(t1) == uvalue(t2)) return 1;
- tm = get_compTM(L, uvalue(t1)->metatable, uvalue(t2)->metatable,
- TM_EQ);
- break; /* will try TM */
- }
- case LUA_TTABLE: {
- if (hvalue(t1) == hvalue(t2)) return 1;
- tm = get_compTM(L, hvalue(t1)->metatable, hvalue(t2)->metatable, TM_EQ);
- break; /* will try TM */
- }
- default: return gcvalue(t1) == gcvalue(t2);
- }
- if (tm == NULL) return 0; /* no TM? */
- callTMres(L, L->top, tm, t1, t2); /* call TM */
- return !l_isfalse(L->top);
-}
-
-
-void luaV_concat (lua_State *L, int total, int last) {
- do {
- StkId top = L->base + last + 1;
- int n = 2; /* number of elements handled in this pass (at least 2) */
- if (!(ttisstring(top-2) || ttisnumber(top-2)) || !tostring(L, top-1)) {
- if (!call_binTM(L, top-2, top-1, top-2, TM_CONCAT))
- luaG_concaterror(L, top-2, top-1);
- } else if (tsvalue(top-1)->len == 0) /* second op is empty? */
- (void)tostring(L, top - 2); /* result is first op (as string) */
- else {
- /* at least two string values; get as many as possible */
- size_t tl = tsvalue(top-1)->len;
- char *buffer;
- int i;
- /* collect total length */
- for (n = 1; n < total && tostring(L, top-n-1); n++) {
- size_t l = tsvalue(top-n-1)->len;
- if (l >= MAX_SIZET - tl) luaG_runerror(L, "string length overflow");
- tl += l;
- }
- buffer = luaZ_openspace(L, &G(L)->buff, tl);
- tl = 0;
- for (i=n; i>0; i--) { /* concat all strings */
- size_t l = tsvalue(top-i)->len;
- memcpy(buffer+tl, svalue(top-i), l);
- tl += l;
- }
- setsvalue2s(L, top-n, luaS_newlstr(L, buffer, tl));
- }
- total -= n-1; /* got `n' strings to create 1 new */
- last -= n-1;
- } while (total > 1); /* repeat until only 1 result left */
-}
-
-
-static void Arith (lua_State *L, StkId ra, const TValue *rb,
- const TValue *rc, TMS op) {
- TValue tempb, tempc;
- const TValue *b, *c;
- if ((b = luaV_tonumber(rb, &tempb)) != NULL &&
- (c = luaV_tonumber(rc, &tempc)) != NULL) {
- lua_Number nb = nvalue(b), nc = nvalue(c);
- switch (op) {
- case TM_ADD: setnvalue(ra, luai_numadd(nb, nc)); break;
- case TM_SUB: setnvalue(ra, luai_numsub(nb, nc)); break;
- case TM_MUL: setnvalue(ra, luai_nummul(nb, nc)); break;
- case TM_DIV: setnvalue(ra, luai_numdiv(nb, nc)); break;
- case TM_MOD: setnvalue(ra, luai_nummod(nb, nc)); break;
- case TM_POW: setnvalue(ra, luai_numpow(nb, nc)); break;
- case TM_UNM: setnvalue(ra, luai_numunm(nb)); break;
- default: lua_assert(0); break;
- }
- }
- else if (!call_binTM(L, rb, rc, ra, op))
- luaG_aritherror(L, rb, rc);
-}
-
-
-
-/*
-** some macros for common tasks in `luaV_execute'
-*/
-
-#define runtime_check(L, c) { if (!(c)) break; }
-
-#define RA(i) (base+GETARG_A(i))
-/* to be used after possible stack reallocation */
-#define RB(i) check_exp(getBMode(GET_OPCODE(i)) == OpArgR, base+GETARG_B(i))
-#define RC(i) check_exp(getCMode(GET_OPCODE(i)) == OpArgR, base+GETARG_C(i))
-#define RKB(i) check_exp(getBMode(GET_OPCODE(i)) == OpArgK, \
- ISK(GETARG_B(i)) ? k+INDEXK(GETARG_B(i)) : base+GETARG_B(i))
-#define RKC(i) check_exp(getCMode(GET_OPCODE(i)) == OpArgK, \
- ISK(GETARG_C(i)) ? k+INDEXK(GETARG_C(i)) : base+GETARG_C(i))
-#define KBx(i) check_exp(getBMode(GET_OPCODE(i)) == OpArgK, k+GETARG_Bx(i))
-
-
-#define dojump(L,pc,i) {(pc) += (i); luai_threadyield(L);}
-
-
-#define Protect(x) { L->savedpc = pc; {x;}; base = L->base; }
-
-
-#define arith_op(op,tm) { \
- TValue *rb = RKB(i); \
- TValue *rc = RKC(i); \
- if (ttisnumber(rb) && ttisnumber(rc)) { \
- lua_Number nb = nvalue(rb), nc = nvalue(rc); \
- setnvalue(ra, op(nb, nc)); \
- } \
- else \
- Protect(Arith(L, ra, rb, rc, tm)); \
- }
-
-
-
-void luaV_execute (lua_State *L, int nexeccalls) {
- LClosure *cl;
- StkId base;
- TValue *k;
- const Instruction *pc;
- reentry: /* entry point */
- lua_assert(isLua(L->ci));
- pc = L->savedpc;
- cl = &clvalue(L->ci->func)->l;
- base = L->base;
- k = cl->p->k;
- /* main loop of interpreter */
- for (;;) {
- const Instruction i = *pc++;
- StkId ra;
- if ((L->hookmask & (LUA_MASKLINE | LUA_MASKCOUNT)) &&
- (--L->hookcount == 0 || L->hookmask & LUA_MASKLINE)) {
- traceexec(L, pc);
- if (L->status == LUA_YIELD) { /* did hook yield? */
- L->savedpc = pc - 1;
- return;
- }
- base = L->base;
- }
- /* warning!! several calls may realloc the stack and invalidate `ra' */
- ra = RA(i);
- lua_assert(base == L->base && L->base == L->ci->base);
- lua_assert(base <= L->top && L->top <= L->stack + L->stacksize);
- lua_assert(L->top == L->ci->top || luaG_checkopenop(i));
- switch (GET_OPCODE(i)) {
- case OP_MOVE: {
- setobjs2s(L, ra, RB(i));
- continue;
- }
- case OP_LOADK: {
- setobj2s(L, ra, KBx(i));
- continue;
- }
- case OP_LOADBOOL: {
- setbvalue(ra, GETARG_B(i));
- if (GETARG_C(i)) pc++; /* skip next instruction (if C) */
- continue;
- }
- case OP_LOADNIL: {
- TValue *rb = RB(i);
- do {
- setnilvalue(rb--);
- } while (rb >= ra);
- continue;
- }
- case OP_GETUPVAL: {
- int b = GETARG_B(i);
- setobj2s(L, ra, cl->upvals[b]->v);
- continue;
- }
- case OP_GETGLOBAL: {
- TValue g;
- TValue *rb = KBx(i);
- sethvalue(L, &g, cl->env);
- lua_assert(ttisstring(rb));
- Protect(luaV_gettable(L, &g, rb, ra));
- continue;
- }
- case OP_GETTABLE: {
- Protect(luaV_gettable(L, RB(i), RKC(i), ra));
- continue;
- }
- case OP_SETGLOBAL: {
- TValue g;
- sethvalue(L, &g, cl->env);
- lua_assert(ttisstring(KBx(i)));
- Protect(luaV_settable(L, &g, KBx(i), ra));
- continue;
- }
- case OP_SETUPVAL: {
- UpVal *uv = cl->upvals[GETARG_B(i)];
- setobj(L, uv->v, ra);
- luaC_barrier(L, uv, ra);
- continue;
- }
- case OP_SETTABLE: {
- Protect(luaV_settable(L, ra, RKB(i), RKC(i)));
- continue;
- }
- case OP_NEWTABLE: {
- int b = GETARG_B(i);
- int c = GETARG_C(i);
- sethvalue(L, ra, luaH_new(L, luaO_fb2int(b), luaO_fb2int(c)));
- Protect(luaC_checkGC(L));
- continue;
- }
- case OP_SELF: {
- StkId rb = RB(i);
- setobjs2s(L, ra+1, rb);
- Protect(luaV_gettable(L, rb, RKC(i), ra));
- continue;
- }
- case OP_ADD: {
- arith_op(luai_numadd, TM_ADD);
- continue;
- }
- case OP_SUB: {
- arith_op(luai_numsub, TM_SUB);
- continue;
- }
- case OP_MUL: {
- arith_op(luai_nummul, TM_MUL);
- continue;
- }
- case OP_DIV: {
- arith_op(luai_numdiv, TM_DIV);
- continue;
- }
- case OP_MOD: {
- arith_op(luai_nummod, TM_MOD);
- continue;
- }
- case OP_POW: {
- arith_op(luai_numpow, TM_POW);
- continue;
- }
- case OP_UNM: {
- TValue *rb = RB(i);
- if (ttisnumber(rb)) {
- lua_Number nb = nvalue(rb);
- setnvalue(ra, luai_numunm(nb));
- }
- else {
- Protect(Arith(L, ra, rb, rb, TM_UNM));
- }
- continue;
- }
- case OP_NOT: {
- int res = l_isfalse(RB(i)); /* next assignment may change this value */
- setbvalue(ra, res);
- continue;
- }
- case OP_LEN: {
- const TValue *rb = RB(i);
- switch (ttype(rb)) {
- case LUA_TTABLE: {
- setnvalue(ra, cast_num(luaH_getn(hvalue(rb))));
- break;
- }
- case LUA_TSTRING: {
- setnvalue(ra, cast_num(tsvalue(rb)->len));
- break;
- }
- default: { /* try metamethod */
- Protect(
- if (!call_binTM(L, rb, luaO_nilobject, ra, TM_LEN))
- luaG_typeerror(L, rb, "get length of");
- )
- }
- }
- continue;
- }
- case OP_CONCAT: {
- int b = GETARG_B(i);
- int c = GETARG_C(i);
- Protect(luaV_concat(L, c-b+1, c); luaC_checkGC(L));
- setobjs2s(L, RA(i), base+b);
- continue;
- }
- case OP_JMP: {
- dojump(L, pc, GETARG_sBx(i));
- continue;
- }
- case OP_EQ: {
- TValue *rb = RKB(i);
- TValue *rc = RKC(i);
- Protect(
- if (equalobj(L, rb, rc) == GETARG_A(i))
- dojump(L, pc, GETARG_sBx(*pc));
- )
- pc++;
- continue;
- }
- case OP_LT: {
- Protect(
- if (luaV_lessthan(L, RKB(i), RKC(i)) == GETARG_A(i))
- dojump(L, pc, GETARG_sBx(*pc));
- )
- pc++;
- continue;
- }
- case OP_LE: {
- Protect(
- if (lessequal(L, RKB(i), RKC(i)) == GETARG_A(i))
- dojump(L, pc, GETARG_sBx(*pc));
- )
- pc++;
- continue;
- }
- case OP_TEST: {
- if (l_isfalse(ra) != GETARG_C(i))
- dojump(L, pc, GETARG_sBx(*pc));
- pc++;
- continue;
- }
- case OP_TESTSET: {
- TValue *rb = RB(i);
- if (l_isfalse(rb) != GETARG_C(i)) {
- setobjs2s(L, ra, rb);
- dojump(L, pc, GETARG_sBx(*pc));
- }
- pc++;
- continue;
- }
- case OP_CALL: {
- int b = GETARG_B(i);
- int nresults = GETARG_C(i) - 1;
- if (b != 0) L->top = ra+b; /* else previous instruction set top */
- L->savedpc = pc;
- switch (luaD_precall(L, ra, nresults)) {
- case PCRLUA: {
- nexeccalls++;
- goto reentry; /* restart luaV_execute over new Lua function */
- }
- case PCRC: {
- /* it was a C function (`precall' called it); adjust results */
- if (nresults >= 0) L->top = L->ci->top;
- base = L->base;
- continue;
- }
- default: {
- return; /* yield */
- }
- }
- }
- case OP_TAILCALL: {
- int b = GETARG_B(i);
- if (b != 0) L->top = ra+b; /* else previous instruction set top */
- L->savedpc = pc;
- lua_assert(GETARG_C(i) - 1 == LUA_MULTRET);
- switch (luaD_precall(L, ra, LUA_MULTRET)) {
- case PCRLUA: {
- /* tail call: put new frame in place of previous one */
- CallInfo *ci = L->ci - 1; /* previous frame */
- int aux;
- StkId func = ci->func;
- StkId pfunc = (ci+1)->func; /* previous function index */
- if (L->openupval) luaF_close(L, ci->base);
- L->base = ci->base = ci->func + ((ci+1)->base - pfunc);
- for (aux = 0; pfunc+aux < L->top; aux++) /* move frame down */
- setobjs2s(L, func+aux, pfunc+aux);
- ci->top = L->top = func+aux; /* correct top */
- lua_assert(L->top == L->base + clvalue(func)->l.p->maxstacksize);
- ci->savedpc = L->savedpc;
- ci->tailcalls++; /* one more call lost */
- L->ci--; /* remove new frame */
- goto reentry;
- }
- case PCRC: { /* it was a C function (`precall' called it) */
- base = L->base;
- continue;
- }
- default: {
- return; /* yield */
- }
- }
- }
- case OP_RETURN: {
- int b = GETARG_B(i);
- if (b != 0) L->top = ra+b-1;
- if (L->openupval) luaF_close(L, base);
- L->savedpc = pc;
- b = luaD_poscall(L, ra);
- if (--nexeccalls == 0) /* was previous function running `here'? */
- return; /* no: return */
- else { /* yes: continue its execution */
- if (b) L->top = L->ci->top;
- lua_assert(isLua(L->ci));
- lua_assert(GET_OPCODE(*((L->ci)->savedpc - 1)) == OP_CALL);
- goto reentry;
- }
- }
- case OP_FORLOOP: {
- lua_Number step = nvalue(ra+2);
- lua_Number idx = luai_numadd(nvalue(ra), step); /* increment index */
- lua_Number limit = nvalue(ra+1);
- if (luai_numlt(0, step) ? luai_numle(idx, limit)
- : luai_numle(limit, idx)) {
- dojump(L, pc, GETARG_sBx(i)); /* jump back */
- setnvalue(ra, idx); /* update internal index... */
- setnvalue(ra+3, idx); /* ...and external index */
- }
- continue;
- }
- case OP_FORPREP: {
- const TValue *init = ra;
- const TValue *plimit = ra+1;
- const TValue *pstep = ra+2;
- L->savedpc = pc; /* next steps may throw errors */
- if (!tonumber(init, ra))
- luaG_runerror(L, LUA_QL("for") " initial value must be a number");
- else if (!tonumber(plimit, ra+1))
- luaG_runerror(L, LUA_QL("for") " limit must be a number");
- else if (!tonumber(pstep, ra+2))
- luaG_runerror(L, LUA_QL("for") " step must be a number");
- setnvalue(ra, luai_numsub(nvalue(ra), nvalue(pstep)));
- dojump(L, pc, GETARG_sBx(i));
- continue;
- }
- case OP_TFORLOOP: {
- StkId cb = ra + 3; /* call base */
- setobjs2s(L, cb+2, ra+2);
- setobjs2s(L, cb+1, ra+1);
- setobjs2s(L, cb, ra);
- L->top = cb+3; /* func. + 2 args (state and index) */
- Protect(luaD_call(L, cb, GETARG_C(i)));
- L->top = L->ci->top;
- cb = RA(i) + 3; /* previous call may change the stack */
- if (!ttisnil(cb)) { /* continue loop? */
- setobjs2s(L, cb-1, cb); /* save control variable */
- dojump(L, pc, GETARG_sBx(*pc)); /* jump back */
- }
- pc++;
- continue;
- }
- case OP_SETLIST: {
- int n = GETARG_B(i);
- int c = GETARG_C(i);
- int last;
- Table *h;
- if (n == 0) {
- n = cast_int(L->top - ra) - 1;
- L->top = L->ci->top;
- }
- if (c == 0) c = cast_int(*pc++);
- runtime_check(L, ttistable(ra));
- h = hvalue(ra);
- last = ((c-1)*LFIELDS_PER_FLUSH) + n;
- if (last > h->sizearray) /* needs more space? */
- luaH_resizearray(L, h, last); /* pre-alloc it at once */
- for (; n > 0; n--) {
- TValue *val = ra+n;
- setobj2t(L, luaH_setnum(L, h, last--), val);
- luaC_barriert(L, h, val);
- }
- continue;
- }
- case OP_CLOSE: {
- luaF_close(L, ra);
- continue;
- }
- case OP_CLOSURE: {
- Proto *p;
- Closure *ncl;
- int nup, j;
- p = cl->p->p[GETARG_Bx(i)];
- nup = p->nups;
- ncl = luaF_newLclosure(L, nup, cl->env);
- ncl->l.p = p;
- for (j=0; j<nup; j++, pc++) {
- if (GET_OPCODE(*pc) == OP_GETUPVAL)
- ncl->l.upvals[j] = cl->upvals[GETARG_B(*pc)];
- else {
- lua_assert(GET_OPCODE(*pc) == OP_MOVE);
- ncl->l.upvals[j] = luaF_findupval(L, base + GETARG_B(*pc));
- }
- }
- setclvalue(L, ra, ncl);
- Protect(luaC_checkGC(L));
- continue;
- }
- case OP_VARARG: {
- int b = GETARG_B(i) - 1;
- int j;
- CallInfo *ci = L->ci;
- int n = cast_int(ci->base - ci->func) - cl->p->numparams - 1;
- if (b == LUA_MULTRET) {
- Protect(luaD_checkstack(L, n));
- ra = RA(i); /* previous call may change the stack */
- b = n;
- L->top = ra + n;
- }
- for (j = 0; j < b; j++) {
- if (j < n) {
- setobjs2s(L, ra + j, ci->base - n + j);
- }
- else {
- setnilvalue(ra + j);
- }
- }
- continue;
- }
- }
- }
-}
-
projects / ceph.git / blobdiff