2 see copyright notice in squirrel.h
4 #include "sqpcheader.h"
8 #include "sqfuncproto.h"
10 #include "sqclosure.h"
13 #include "squserdata.h"
17 #define TOP() (_stack[_top-1])
19 bool SQVM::BW_OP(unsigned int op,SQObjectPtr &trg,const SQObjectPtr &o1,const SQObjectPtr &o2)
22 SQInteger i1 = _integer(o1), i2 = _integer(o2);
23 if((type(o1)==OT_INTEGER) && (type(o2)==OT_INTEGER))
26 case BW_AND: res = i1 & i2; break;
27 case BW_OR: res = i1 | i2; break;
28 case BW_XOR: res = i1 ^ i2; break;
29 case BW_SHIFTL: res = i1 << i2; break;
30 case BW_SHIFTR: res = i1 >> i2; break;
31 case BW_USHIFTR:res = (SQInteger)(*((unsigned int*)&i1) >> i2); break;
32 default: { Raise_Error(_SC("internal vm error bitwise op failed")); return false; }
35 else { Raise_Error(_SC("bitwise op between '%s' and '%s'"),GetTypeName(o1),GetTypeName(o2)); return false;}
40 bool SQVM::ARITH_OP(unsigned int op,SQObjectPtr &trg,const SQObjectPtr &o1,const SQObjectPtr &o2)
42 if(sq_isnumeric(o1) && sq_isnumeric(o2)) {
43 if((type(o1)==OT_INTEGER) && (type(o2)==OT_INTEGER)) {
45 case '+': trg = _integer(o1) + _integer(o2); break;
46 case '-': trg = _integer(o1) - _integer(o2); break;
47 case '/': if(_integer(o2) == 0) { Raise_Error(_SC("division by zero")); return false; }
48 trg = _integer(o1) / _integer(o2);
50 case '*': trg = _integer(o1) * _integer(o2); break;
51 case '%': trg = _integer(o1) % _integer(o2); break;
55 case '+': trg = tofloat(o1) + tofloat(o2); break;
56 case '-': trg = tofloat(o1) - tofloat(o2); break;
57 case '/': trg = tofloat(o1) / tofloat(o2); break;
58 case '*': trg = tofloat(o1) * tofloat(o2); break;
59 case '%': trg = SQFloat(fmod((double)tofloat(o1),(double)tofloat(o2))); break;
63 if(op == '+' && (type(o1) == OT_STRING || type(o2) == OT_STRING)){
64 if(!StringCat(o1, o2, trg)) return false;
66 else if(!ArithMetaMethod(op,o1,o2,trg)) {
67 Raise_Error(_SC("arith op %c on between '%s' and '%s'"),op,GetTypeName(o1),GetTypeName(o2)); return false;
73 SQObjectPtr &stack_get(HSQUIRRELVM v,int idx){return ((idx>=0)?(v->GetAt(idx+v->_stackbase-1)):(v->GetUp(idx)));}
75 SQVM::SQVM(SQSharedState *ss)
80 _suspended_root = SQFalse;
86 _errorhandler = _null_;
88 INIT_CHAIN();ADD_TO_CHAIN(&_ss(this)->_gc_chain,this);
95 _errorhandler = _null_;
98 int size=_stack.size();
99 for(int i=0;i<size;i++)
106 REMOVE_FROM_CHAIN(&_ss(this)->_gc_chain,this);
109 bool SQVM::ArithMetaMethod(int op,const SQObjectPtr &o1,const SQObjectPtr &o2,SQObjectPtr &dest)
113 case _SC('+'): mm=MT_ADD; break;
114 case _SC('-'): mm=MT_SUB; break;
115 case _SC('/'): mm=MT_DIV; break;
116 case _SC('*'): mm=MT_MUL; break;
117 case _SC('%'): mm=MT_MODULO; break;
119 if(is_delegable(o1) && _delegable(o1)->_delegate) {
121 return CallMetaMethod(_delegable(o1),mm,2,dest);
126 bool SQVM::NEG_OP(SQObjectPtr &trg,const SQObjectPtr &o)
139 if(_delegable(o)->_delegate) {
141 if(CallMetaMethod(_delegable(o), MT_UNM, 1, temp_reg)) {
149 Raise_Error(_SC("attempt to negate a %s"), GetTypeName(o));
153 #define _RET_SUCCEED(exp) { result = (exp); return true; }
154 bool SQVM::ObjCmp(const SQObjectPtr &o1,const SQObjectPtr &o2,int &result)
156 if(type(o1)==type(o2)){
157 if(_userpointer(o1)==_userpointer(o2))_RET_SUCCEED(0);
161 _RET_SUCCEED(scstrcmp(_stringval(o1),_stringval(o2)));
163 _RET_SUCCEED(_integer(o1)-_integer(o2));
165 _RET_SUCCEED((_float(o1)<_float(o2))?-1:1);
170 if(_delegable(o1)->_delegate)CallMetaMethod(_delegable(o1),MT_CMP,2,res);
173 if(type(res)!=OT_INTEGER) { Raise_CompareError(o1,o2); return false; }
174 _RET_SUCCEED(_integer(res));
177 if(sq_isnumeric(o1) && sq_isnumeric(o2)){
178 if((type(o1)==OT_INTEGER) && (type(o2)==OT_FLOAT)) {
179 if( _integer(o1)==_float(o2) ) { _RET_SUCCEED(0); }
180 else if( _integer(o1)<_float(o2) ) { _RET_SUCCEED(-1); }
184 if( _float(o1)==_integer(o2) ) { _RET_SUCCEED(0); }
185 else if( _float(o1)<_integer(o2) ) { _RET_SUCCEED(-1); }
189 else if(type(o1)==OT_NULL) {_RET_SUCCEED(-1);}
190 else if(type(o2)==OT_NULL) {_RET_SUCCEED(1);}
191 else { Raise_CompareError(o1,o2); return false; }
195 _RET_SUCCEED(0); //cannot happen
198 bool SQVM::CMP_OP(CmpOP op, const SQObjectPtr &o1,const SQObjectPtr &o2,SQObjectPtr &res)
201 if(ObjCmp(o1,o2,r)) {
203 case CMP_G: res = (r > 0)?_true_:_false_; return true;
204 case CMP_GE: res = (r >= 0)?_true_:_false_; return true;
205 case CMP_L: res = (r < 0)?_true_:_false_; return true;
206 case CMP_LE: res = (r <= 0)?_true_:_false_; return true;
214 bool SQVM::StringCat(const SQObjectPtr &str,const SQObjectPtr &obj,SQObjectPtr &dest)
221 int l=_string(str)->_len,ol=_string(obj)->_len;
222 SQChar *s=_sp(rsl(l+ol+1));
223 memcpy(s,_stringval(str),rsl(l));memcpy(s+l,_stringval(obj),rsl(ol));s[l+ol]=_SC('\0');
227 scsprintf(_sp(rsl(NUMBER_MAX_CHAR+_string(obj)->_len+1)),_SC("%g%s"),_float(str),_stringval(obj));
230 scsprintf(_sp(rsl(NUMBER_MAX_CHAR+_string(obj)->_len+1)),_SC("%d%s"),_integer(str),_stringval(obj));
233 Raise_Error(_SC("string concatenation between '%s' and '%s'"),GetTypeName(str),GetTypeName(obj));
236 dest=SQString::Create(_ss(this),_spval);
239 scsprintf(_sp(rsl(NUMBER_MAX_CHAR+_string(str)->_len+1)),_SC("%s%g"),_stringval(str),_float(obj));
240 dest=SQString::Create(_ss(this),_spval);
243 scsprintf(_sp(rsl(NUMBER_MAX_CHAR+_string(str)->_len+1)),_SC("%s%d"),_stringval(str),_integer(obj));
244 dest=SQString::Create(_ss(this),_spval);
247 Raise_Error(_SC("string concatenation between '%s' and '%s'"),GetTypeName(str),GetTypeName(obj));
253 const SQChar *IdType2Name(SQObjectType type)
255 switch(_RAW_TYPE(type))
257 case _RT_NULL:return _SC("null");
258 case _RT_INTEGER:return _SC("integer");
259 case _RT_FLOAT:return _SC("float");
260 case _RT_BOOL:return _SC("bool");
261 case _RT_STRING:return _SC("string");
262 case _RT_TABLE:return _SC("table");
263 case _RT_ARRAY:return _SC("array");
264 case _RT_GENERATOR:return _SC("generator");
266 case _RT_NATIVECLOSURE:
267 return _SC("function");
269 case _RT_USERPOINTER:
270 return _SC("userdata");
271 case _RT_THREAD: return _SC("thread");
272 case _RT_FUNCPROTO: return _SC("function");
273 case _RT_CLASS: return _SC("class");
274 case _RT_INSTANCE: return _SC("instance");
280 const SQChar *GetTypeName(const SQObjectPtr &obj1)
282 return IdType2Name(type(obj1));
285 void SQVM::TypeOf(const SQObjectPtr &obj1,SQObjectPtr &dest)
287 if(is_delegable(obj1) && _delegable(obj1)->_delegate) {
289 if(CallMetaMethod(_delegable(obj1),MT_TYPEOF,1,dest))
292 dest = SQString::Create(_ss(this),GetTypeName(obj1));
295 bool SQVM::Init(SQVM *friendvm, int stacksize)
297 _stack.resize(stacksize);
298 _callsstack.reserve(4);
302 _roottable = SQTable::Create(_ss(this), 0);
304 _roottable = friendvm->_roottable;
305 _errorhandler = friendvm->_errorhandler;
306 _debughook = friendvm->_debughook;
309 sq_base_register(this);
313 extern SQInstructionDesc g_InstrDesc[];
315 bool SQVM::StartCall(SQClosure *closure,int target,int nargs,int stackbase,bool tailcall)
317 SQFunctionProto *func = _funcproto(closure->_function);
318 //const int outerssize = func->_outervalues.size();
320 const int paramssize = func->_parameters.size();
321 const int oldtop = _top;
322 const int newtop = stackbase + func->_stacksize;
327 if (nargs < paramssize) {
328 Raise_Error(_SC("wrong number of parameters"));
331 for(int n = 0; n < nargs - paramssize; n++) {
332 _vargsstack.push_back(_stack[stackbase+paramssize+n]);
333 _stack[stackbase+paramssize+n] = _null_;
337 if (paramssize != nargs) {
338 Raise_Error(_SC("wrong number of parameters"));
345 PUSH_CALLINFO(this, CallInfo());
347 ci->_prevstkbase = stackbase - _stackbase;
348 ci->_target = target;
349 ci->_prevtop = _top - _stackbase;
356 ci->_vargs.size = (nargs - paramssize);
357 ci->_vargs.base = _vargsstack.size()-(nargs - paramssize);
358 ci->_closure._unVal.pClosure = closure;
359 ci->_closure._type = OT_CLOSURE;
360 ci->_iv = &func->_instructions;
361 ci->_literals = &func->_literals;
362 //grows the stack if needed
363 if (((unsigned int)newtop + (func->_stacksize<<1)) > _stack.size()) {
364 _stack.resize(_stack.size() + (func->_stacksize<<1));
368 _stackbase = stackbase;
369 ci->_ip = ci->_iv->_vals;
373 bool SQVM::Return(int _arg0, int _arg1, SQObjectPtr &retval)
375 if (type(_debughook) != OT_NULL && _rawval(_debughook) != _rawval(ci->_closure))
376 for(int i=0;i<ci->_ncalls;i++)
377 CallDebugHook(_SC('r'));
379 SQBool broot = ci->_root;
381 int target = ci->_target;
382 int oldstackbase = _stackbase;
383 _stackbase -= ci->_prevstkbase;
384 _top = _stackbase + ci->_prevtop;
385 if(ci->_vargs.size) PopVarArgs(ci->_vargs);
388 if (_arg0 != MAX_FUNC_STACKSIZE) retval = _stack[oldstackbase+_arg1];
389 else retval = _null_;
392 if (_arg0 != MAX_FUNC_STACKSIZE)
393 STK(target) = _stack[oldstackbase+_arg1];
395 STK(target) = _null_;
398 while (last_top >= _top) _stack[last_top--].Null();
399 assert(oldstackbase >= _stackbase);
400 return broot?true:false;
403 #define _RET_ON_FAIL(exp) { if(!exp) return false; }
405 bool SQVM::LOCAL_INC(int op,SQObjectPtr &target, SQObjectPtr &a, SQObjectPtr &incr)
407 _RET_ON_FAIL(ARITH_OP( op , target, a, incr));
412 bool SQVM::PLOCAL_INC(int op,SQObjectPtr &target, SQObjectPtr &a, SQObjectPtr &incr)
415 _RET_ON_FAIL(ARITH_OP( op , trg, a, incr));
421 bool SQVM::DerefInc(int op,SQObjectPtr &target, SQObjectPtr &self, SQObjectPtr &key, SQObjectPtr &incr, bool postfix)
423 SQObjectPtr tmp, tself = self, tkey = key;
424 if (!Get(tself, tkey, tmp, false, true)) { Raise_IdxError(tkey); return false; }
425 _RET_ON_FAIL(ARITH_OP( op , target, tmp, incr))
426 Set(tself, tkey, target,true);
427 if (postfix) target = tmp;
431 #define arg0 (_i_._arg0)
432 #define arg1 (_i_._arg1)
433 #define sarg1 (*((int *)&_i_._arg1))
434 #define arg2 (_i_._arg2)
435 #define arg3 (_i_._arg3)
436 #define sarg3 (*((char *)&_i_._arg3))
438 SQRESULT SQVM::Suspend()
441 return sq_throwerror(this, _SC("cannot suspend an already suspended vm"));
442 if (_nnativecalls!=2)
443 return sq_throwerror(this, _SC("cannot suspend through native calls/metamethods"));
444 return SQ_SUSPEND_FLAG;
447 void SQVM::PopVarArgs(VarArgs &vargs)
449 for(int n = 0; n< vargs.size; n++)
450 _vargsstack.pop_back();
453 #define _FINISH(stoploop) {finished = stoploop; return true; }
454 bool SQVM::FOREACH_OP(SQObjectPtr &o1,SQObjectPtr &o2,SQObjectPtr
455 &o3,SQObjectPtr &o4,int arg_2,bool &finished)
460 if((nrefidx = _table(o1)->Next(o4, o2, o3)) == -1) _FINISH(true);
461 o4 = (SQInteger)nrefidx; _FINISH(false);
463 if((nrefidx = _array(o1)->Next(o4, o2, o3)) == -1) _FINISH(true);
464 o4 = (SQInteger) nrefidx; _FINISH(false);
466 if((nrefidx = _string(o1)->Next(o4, o2, o3)) == -1)_FINISH(true);
467 o4 = (SQInteger)nrefidx; _FINISH(false);
469 if((nrefidx = _class(o1)->Next(o4, o2, o3)) == -1)_FINISH(true);
470 o4 = (SQInteger)nrefidx; _FINISH(false);
473 if(_delegable(o1)->_delegate) {
477 if(CallMetaMethod(_delegable(o1), MT_NEXTI, 2, itr)){
479 if(type(itr) == OT_NULL) _FINISH(true);
480 if(!Get(o1, itr, o3, false,false)) {
481 Raise_Error(_SC("_nexti returned an invalid idx"));
486 Raise_Error(_SC("_nexti failed"));
491 if(_generator(o1)->_state == SQGenerator::eDead) _FINISH(true);
492 if(_generator(o1)->_state == SQGenerator::eSuspended) {
494 if(type(o4) == OT_INTEGER) {
495 idx = _integer(o4) + 1;
499 _generator(o1)->Resume(this, arg_2+1);
503 Raise_Error(_SC("cannot iterate %s"), GetTypeName(o1));
504 return false; //cannot be hit(just to avoid warnings)
507 bool SQVM::DELEGATE_OP(SQObjectPtr &trg,SQObjectPtr &o1,SQObjectPtr &o2)
509 if(type(o1) != OT_TABLE) { Raise_Error(_SC("delegating a '%s'"), GetTypeName(o1)); return false; }
512 if(!_table(o1)->SetDelegate(_table(o2))){
513 Raise_Error(_SC("delegate cycle detected"));
518 _table(o1)->SetDelegate(NULL);
521 Raise_Error(_SC("using '%s' as delegate"), GetTypeName(o2));
528 #define COND_LITERAL (arg3!=0?(*ci->_literals)[arg1]:STK(arg1))
530 #define _GUARD(exp) { if(!exp) { Raise_Error(_lasterror); SQ_THROW();} }
532 #define SQ_THROW() { goto exception_trap; }
534 bool SQVM::CLOSURE_OP(SQObjectPtr &target, SQFunctionProto *func)
537 SQClosure *closure = SQClosure::Create(_ss(this), func);
538 if(nouters = func->_outervalues.size()) {
539 closure->_outervalues.reserve(nouters);
540 for(int i = 0; i<nouters; i++) {
541 SQOuterVar &v = func->_outervalues[i];
544 closure->_outervalues.push_back(_null_);
545 if(!Get(_stack._vals[_stackbase]/*STK(0)*/, v._src, closure->_outervalues.top(), false,true))
546 {Raise_IdxError(v._src); return false; }
549 closure->_outervalues.push_back(_stack._vals[_stackbase+_integer(v._src)]);
552 closure->_outervalues.push_back(_closure(ci->_closure)->_outervalues[_integer(v._src)]);
562 bool SQVM::GETVARGV_OP(SQObjectPtr &target,SQObjectPtr &index,CallInfo *ci)
564 if(ci->_vargs.size == 0) {
565 Raise_Error(_SC("the function doesn't have var args"));
568 if(!sq_isnumeric(index)){
569 Raise_Error(_SC("indexing 'vargv' with %s"),GetTypeName(index));
572 int idx = tointeger(index);
573 if(idx < 0 || idx >= ci->_vargs.size){ Raise_Error(_SC("vargv index out of range")); return false; }
574 target = _vargsstack[ci->_vargs.base+idx];
578 bool SQVM::CLASS_OP(SQObjectPtr &target,int baseclass,int attributes)
580 SQClass *base = NULL;
582 if(baseclass != MAX_LITERALS) {
583 if(type(_stack._vals[_stackbase+baseclass]) != OT_CLASS) { Raise_Error(_SC("trying to inherit from a %s"),GetTypeName(_stack._vals[_stackbase+baseclass])); return false; }
584 base = _class(_stack._vals[_stackbase + baseclass]);
586 if(attributes != MAX_FUNC_STACKSIZE) {
587 attrs = _stack._vals[_stackbase+attributes];
589 target = SQClass::Create(_ss(this),base);
590 _class(target)->_attributes = attrs;
594 bool SQVM::IsFalse(SQObjectPtr &o)
596 SQObjectType t = type(o);
597 if((t & SQOBJECT_CANBEFALSE)
598 && ((t == OT_NULL) || ((t == OT_INTEGER || t == OT_BOOL) && _integer(o) == 0)
599 || (t == OT_FLOAT && _float(o) == SQFloat(0.0)))) {
605 bool SQVM::IsEqual(SQObjectPtr &o1,SQObjectPtr &o2,bool &res)
607 if(type(o1) == type(o2)) {
608 res = ((_userpointer(o1) == _userpointer(o2)?true:false));
611 if(sq_isnumeric(o1) && sq_isnumeric(o2)) {
613 if(!ObjCmp(o1, o2,cmpres)) return false;
623 bool SQVM::Execute(SQObjectPtr &closure, int target, int nargs, int stackbase,SQObjectPtr &outres, ExecutionType et)
625 if ((_nnativecalls + 1) > MAX_NATIVE_CALLS) { Raise_Error(_SC("Native stack overflow")); return false; }
627 AutoDec ad(&_nnativecalls);
629 //temp_reg vars for OP_CALL
635 if(!StartCall(_closure(closure), _top - nargs, nargs, stackbase, false)) {
636 //call the handler if there are no calls in the stack, if not relies on the previous node
637 if(ci == NULL) CallErrorHandler(_lasterror);
642 case ET_RESUME_GENERATOR: _generator(closure)->Resume(this, target); ci->_root = SQTrue; traps += ci->_etraps; break;
644 traps = _suspended_traps;
645 ci->_root = _suspended_root;
646 _suspended = SQFalse;
655 const SQInstruction &_i_ = *ci->_ip++;
656 //dumpstack(_stackbase);
657 //scprintf("\n[%d] %s %d %d %d %d\n",ci->_ip-ci->_iv->_vals,g_InstrDesc[_i_.op].name,arg0,arg1,arg2,arg3);
661 if(type(_debughook) != OT_NULL && _rawval(_debughook) != _rawval(ci->_closure))
662 CallDebugHook(_SC('l'),arg1);
664 case _OP_LOAD: TARGET = (*ci->_literals)[arg1]; continue;
666 temp_reg = STK(arg1);
667 if (type(temp_reg) == OT_CLOSURE){
669 if(ci->_vargs.size) PopVarArgs(ci->_vargs);
670 for (int i = 0; i < arg3; i++) STK(i) = STK(arg2 + i);
671 ct_target = ci->_target;
677 temp_reg = STK(arg1);
680 switch (type(temp_reg)) {
682 _GUARD(StartCall(_closure(temp_reg), ct_target, arg3, ct_tailcall?_stackbase:_stackbase+arg2, ct_tailcall));
683 if (_funcproto(_closure(temp_reg)->_function)->_bgenerator) {
684 SQGenerator *gen = SQGenerator::Create(_ss(this), _closure(temp_reg));
685 _GUARD(gen->Yield(this));
686 Return(1, ct_target, temp_reg);
687 STK(ct_target) = gen;
688 while (last_top >= _top) _stack[last_top--].Null();
691 if (type(_debughook) != OT_NULL && _rawval(_debughook) != _rawval(ci->_closure))
692 CallDebugHook(_SC('c'));
695 case OT_NATIVECLOSURE: {
697 _GUARD(CallNative(_nativeclosure(temp_reg), arg3, _stackbase+arg2, ct_tailcall, temp_reg,suspend));
700 _suspended_target = ct_target;
701 _suspended_root = ci->_root;
702 _suspended_traps = traps;
706 STK(ct_target) = temp_reg;
710 _GUARD(CreateClassInstance(_class(temp_reg),arg3,_stackbase+arg2,STK(ct_target)));
718 for (int i = 0; i < arg3; i++) Push(STK(arg2 + i));
719 if (_delegable(temp_reg) && CallMetaMethod(_delegable(temp_reg), MT_CALL, arg3+1, temp_reg)){
720 STK(ct_target) = temp_reg;
723 Raise_Error(_SC("attempt to call '%s'"), GetTypeName(temp_reg));
727 Raise_Error(_SC("attempt to call '%s'"), GetTypeName(temp_reg));
733 if (!Get(STK(arg2), STK(arg1), temp_reg, false,true))
734 { Raise_IdxError(STK(arg1)); SQ_THROW(); }
735 goto common_prepcall;
737 if (!Get(STK(arg2), (*ci->_literals)[arg1], temp_reg,false,true)) {
738 if(type(STK(arg2)) == OT_CLASS) { //hack?
739 if(_class_ddel->Get((*ci->_literals)[arg1],temp_reg)) {
740 STK(arg3) = STK(arg2);
745 { Raise_IdxError((*ci->_literals)[arg1]); SQ_THROW();}
748 if(type(STK(arg2)) == OT_CLASS) {
749 STK(arg3) = STK(0); // this
752 STK(arg3) = STK(arg2);
757 if (!Get(STK(arg2), (*ci->_literals)[arg1], temp_reg, false,true)) { Raise_IdxError((*ci->_literals)[arg1]); SQ_THROW();}
760 case _OP_MOVE: TARGET = STK(arg1); continue;
762 _GUARD(NewSlot(STK(arg1), STK(arg2), STK(arg3)));
763 if(arg0 != arg3) TARGET = STK(arg3);
765 case _OP_DELETE: _GUARD(DeleteSlot(STK(arg1), STK(arg2), TARGET)); continue;
767 if (!Set(STK(arg1), STK(arg2), STK(arg3),true)) { Raise_IdxError(STK(arg2)); SQ_THROW(); }
768 if (arg0 != arg3) TARGET = STK(arg3);
771 if (!Get(STK(arg1), STK(arg2), temp_reg, false,true)) { Raise_IdxError(STK(arg2)); SQ_THROW(); }
776 if(!IsEqual(STK(arg2),COND_LITERAL,res)) { SQ_THROW(); }
777 TARGET = res?_true_:_false_;
781 if(!IsEqual(STK(arg2),COND_LITERAL,res)) { SQ_THROW(); }
782 TARGET = (!res)?_true_:_false_;
784 case _OP_ARITH: _GUARD(ARITH_OP( arg3 , temp_reg, STK(arg2), STK(arg1))); TARGET = temp_reg; continue;
785 case _OP_BITW: _GUARD(BW_OP( arg3,TARGET,STK(arg2),STK(arg1))); continue;
787 if(type((ci)->_generator) == OT_GENERATOR) {
788 _generator((ci)->_generator)->Kill();
790 if(Return(arg0, arg1, temp_reg)){
796 case _OP_LOADNULLS:{ for(unsigned int n=0;n<arg1;n++) STK(arg0+n) = _null_; }continue;
797 case _OP_LOADROOTTABLE: TARGET = _roottable; continue;
798 case _OP_LOADBOOL: TARGET = arg1?_true_:_false_; continue;
799 case _OP_DMOVE: STK(arg0) = STK(arg1); STK(arg2) = STK(arg3); continue;
800 case _OP_JMP: ci->_ip += (sarg1); continue;
801 case _OP_JNZ: if(!IsFalse(STK(arg0))) ci->_ip+=(sarg1); continue;
802 case _OP_JZ: if(IsFalse(STK(arg0))) ci->_ip+=(sarg1); continue;
803 case _OP_LOADFREEVAR: TARGET = _closure(ci->_closure)->_outervalues[arg1]; continue;
804 case _OP_VARGC: TARGET = SQInteger(ci->_vargs.size); continue;
806 if(!GETVARGV_OP(TARGET,STK(arg1),ci)) { SQ_THROW(); }
808 case _OP_NEWTABLE: TARGET = SQTable::Create(_ss(this), arg1); continue;
809 case _OP_NEWARRAY: TARGET = SQArray::Create(_ss(this), 0); _array(TARGET)->Reserve(arg1); continue;
810 case _OP_APPENDARRAY: _array(STK(arg0))->Append(COND_LITERAL); continue;
812 switch(type(STK(arg1))) {
814 TARGET = _table(STK(arg1))->_delegate?SQObjectPtr(_table(STK(arg1))->_delegate):_null_;
816 case OT_CLASS: TARGET = _class(STK(arg1))->_base?_class(STK(arg1))->_base:_null_;
819 Raise_Error(_SC("the %s type doesn't have a parent slot"), GetTypeName(STK(arg1)));
822 case _OP_COMPARITH: _GUARD(DerefInc(arg3, TARGET, STK((((unsigned int)arg1&0xFFFF0000)>>16)), STK(arg2), STK(arg1&0x0000FFFF), false)); continue;
823 case _OP_COMPARITHL: _GUARD(LOCAL_INC(arg3, TARGET, STK(arg1), STK(arg2))); continue;
824 case _OP_INC: {SQObjectPtr o(sarg3); _GUARD(DerefInc('+',TARGET, STK(arg1), STK(arg2), o, false));} continue;
825 case _OP_INCL: {SQObjectPtr o(sarg3); _GUARD(LOCAL_INC('+',TARGET, STK(arg1), o));} continue;
826 case _OP_PINC: {SQObjectPtr o(sarg3); _GUARD(DerefInc('+',TARGET, STK(arg1), STK(arg2), o, true));} continue;
827 case _OP_PINCL: {SQObjectPtr o(sarg3); _GUARD(PLOCAL_INC('+',TARGET, STK(arg1), o));} continue;
828 case _OP_CMP: _GUARD(CMP_OP((CmpOP)arg3,STK(arg2),STK(arg1),TARGET)) continue;
829 case _OP_EXISTS: TARGET = Get(STK(arg1), STK(arg2), temp_reg, true,false)?_true_:_false_;continue;
831 if(type(STK(arg1)) != OT_CLASS || type(STK(arg2)) != OT_INSTANCE)
832 {Raise_Error(_SC("cannot apply instanceof between a %s and a %s"),GetTypeName(STK(arg1)),GetTypeName(STK(arg2))); SQ_THROW();}
833 TARGET = _instance(STK(arg2))->InstanceOf(_class(STK(arg1)))?_true_:_false_;
836 if(IsFalse(STK(arg2))) {
842 if(!IsFalse(STK(arg2))) {
847 case _OP_NEG: _GUARD(NEG_OP(TARGET,STK(arg1))); continue;
848 case _OP_NOT: TARGET = (IsFalse(STK(arg1))?_true_:_false_); continue;
850 if(type(STK(arg1)) == OT_INTEGER) {
851 TARGET = SQInteger(~_integer(STK(arg1)));
854 Raise_Error(_SC("attempt to perform a bitwise op on a %s"), GetTypeName(STK(arg1)));
857 SQClosure *c = ci->_closure._unVal.pClosure;
858 SQFunctionProto *fp = c->_function._unVal.pFunctionProto;
859 if(!CLOSURE_OP(TARGET,fp->_functions[arg1]._unVal.pFunctionProto)) { SQ_THROW(); }
863 if(type(ci->_generator) == OT_GENERATOR) {
864 if(sarg1 != MAX_FUNC_STACKSIZE) temp_reg = STK(arg1);
865 _GUARD(_generator(ci->_generator)->Yield(this));
866 traps -= ci->_etraps;
867 if(sarg1 != MAX_FUNC_STACKSIZE) STK(arg1) = temp_reg;
869 else { Raise_Error(_SC("trying to yield a '%s',only genenerator can be yielded"), GetTypeName(ci->_generator)); SQ_THROW();}
870 if(Return(arg0, arg1, temp_reg)){
879 if(type(STK(arg1)) != OT_GENERATOR){ Raise_Error(_SC("trying to resume a '%s',only genenerator can be resumed"), GetTypeName(STK(arg1))); SQ_THROW();}
880 _GUARD(_generator(STK(arg1))->Resume(this, arg0));
881 traps += ci->_etraps;
883 case _OP_FOREACH:{ bool finished;
884 _GUARD(FOREACH_OP(STK(arg0),STK(arg2),STK(arg2+1),STK(arg2+2),arg2,finished));
885 if(finished) ci->_ip += sarg1; }
887 case _OP_DELEGATE: _GUARD(DELEGATE_OP(TARGET,STK(arg1),STK(arg2))); continue;
889 if(!Clone(STK(arg1), TARGET))
890 { Raise_Error(_SC("cloning a %s"), GetTypeName(STK(arg1))); SQ_THROW();}
892 case _OP_TYPEOF: TypeOf(STK(arg1), TARGET); continue;
894 _etraps.push_back(SQExceptionTrap(_top,_stackbase, &ci->_iv->_vals[(ci->_ip-ci->_iv->_vals)+arg1], arg0)); traps++;
898 for(int i=0; i<arg0; i++) {
899 _etraps.pop_back(); traps--;
903 case _OP_THROW: Raise_Error(TARGET); SQ_THROW(); continue;
904 case _OP_CLASS: _GUARD(CLASS_OP(TARGET,arg1,arg2)); continue;
906 _GUARD(NewSlot(STK(arg1), STK(arg2), STK(arg3)));
907 _class(STK(arg1))->SetAttributes(STK(arg2),STK(arg2-1));
908 if(arg0 != arg3) TARGET = STK(arg3);
916 SQObjectPtr currerror = _lasterror;
917 // dumpstack(_stackbase);
923 if(ci->_etraps > 0) {
924 SQExceptionTrap &et = _etraps.top();
926 _top = et._stacksize;
927 _stackbase = et._stackbase;
928 _stack[_stackbase+et._extarget] = currerror;
929 _etraps.pop_back(); traps--; ci->_etraps--;
930 while(last_top >= _top) _stack[last_top--].Null();
931 goto exception_restore;
933 //if is a native closure
934 if(type(ci->_closure) != OT_CLOSURE && n)
936 if(type(ci->_generator) == OT_GENERATOR) _generator(ci->_generator)->Kill();
937 PopVarArgs(ci->_vargs);
940 }while(_callsstack.size());
943 CallErrorHandler(currerror);
944 //remove call stack until a C function is found or the cstack is empty
946 SQBool exitafterthisone = ci->_root;
947 if(type(ci->_generator) == OT_GENERATOR) _generator(ci->_generator)->Kill();
948 _stackbase -= ci->_prevstkbase;
949 _top = _stackbase + ci->_prevtop;
950 PopVarArgs(ci->_vargs);
952 if( (ci && type(ci->_closure) != OT_CLOSURE) || exitafterthisone) break;
953 }while(_callsstack.size());
955 while(last_top >= _top) _stack[last_top--].Null();
957 _lasterror = currerror;
963 bool SQVM::CreateClassInstance(SQClass *theclass, int nargs, int stackbase, SQObjectPtr &retval)
966 SQObjectPtr inst = theclass->CreateInstance();
967 _stack[stackbase] = inst;
968 if(theclass->Get(_ss(this)->_constructoridx,constr)) {
969 if(!Call(constr,nargs,stackbase,constr))
976 void SQVM::CallErrorHandler(SQObjectPtr &error)
978 if(type(_errorhandler) != OT_NULL) {
980 Push(_roottable); Push(error);
981 Call(_errorhandler, 2, _top-2, out);
986 void SQVM::CallDebugHook(int type,int forcedline)
988 SQObjectPtr temp_reg;
990 SQFunctionProto *func=_funcproto(_closure(ci->_closure)->_function);
991 Push(_roottable); Push(type); Push(func->_sourcename); Push(forcedline?forcedline:func->GetLine(ci->_ip)); Push(func->_name);
992 Call(_debughook,nparams,_top-nparams,temp_reg);
996 bool SQVM::CallNative(SQNativeClosure *nclosure,int nargs,int stackbase,bool tailcall,SQObjectPtr &retval,bool &suspend)
998 if (_nnativecalls + 1 > MAX_NATIVE_CALLS) { Raise_Error(_SC("Native stack overflow")); return false; }
999 int nparamscheck = nclosure->_nparamscheck;
1000 if(((nparamscheck > 0) && (nparamscheck != nargs))
1001 || ((nparamscheck < 0) && (nargs < (-nparamscheck)))) {
1002 Raise_Error(_SC("wrong number of parameters"));
1007 if(tcs = nclosure->_typecheck.size()) {
1008 for(int i = 0; i < nargs && i < tcs; i++)
1009 if((nclosure->_typecheck[i] != -1) && !(type(_stack[stackbase+i]) & nclosure->_typecheck[i])) {
1010 Raise_ParamTypeError(i,nclosure->_typecheck[i],type(_stack[stackbase+i]));
1015 if ((_top + MIN_STACK_OVERHEAD) > (int)_stack.size()) {
1016 _stack.resize(_stack.size() + (MIN_STACK_OVERHEAD<<1));
1019 int oldstackbase = _stackbase;
1020 _top = stackbase + nargs;
1021 PUSH_CALLINFO(this, CallInfo());
1023 ci->_closure._unVal.pNativeClosure = nclosure;
1024 ci->_closure._type = OT_NATIVECLOSURE;
1025 ci->_prevstkbase = stackbase - _stackbase;
1027 _stackbase = stackbase;
1028 //push free variables
1029 int outers = nclosure->_outervalues.size();
1030 for (int i = 0; i < outers; i++) {
1031 Push(nclosure->_outervalues[i]);
1033 ci->_prevtop = (oldtop - oldstackbase);
1034 int ret = (nclosure->_function)(this);
1037 if( ret == SQ_SUSPEND_FLAG) suspend = true;
1039 _stackbase = oldstackbase;
1042 Raise_Error(_lasterror);
1046 if (ret != 0){ retval = TOP(); }
1047 else { retval = _null_; }
1048 _stackbase = oldstackbase;
1054 bool SQVM::Get(const SQObjectPtr &self,const SQObjectPtr &key,SQObjectPtr &dest,bool raw, bool fetchroot)
1058 if(_table(self)->Get(key,dest))return true;
1061 if(sq_isnumeric(key)){
1062 return _array(self)->Get(tointeger(key),dest);
1066 if(_instance(self)->Get(key,dest)) return true;
1069 if(FallBackGet(self,key,dest,raw)) return true;
1072 if(_rawval(STK(0)) == _rawval(self) &&
1073 type(STK(0)) == type(self)) {
1074 return _table(_roottable)->Get(key,dest);
1080 bool SQVM::FallBackGet(const SQObjectPtr &self,const SQObjectPtr &key,SQObjectPtr &dest,bool raw)
1084 return _class(self)->Get(key,dest);
1089 if(_delegable(self)->_delegate) {
1090 if(Get(SQObjectPtr(_delegable(self)->_delegate),key,dest,raw,false))
1092 if(raw)return false;
1093 Push(self);Push(key);
1094 if(CallMetaMethod(_delegable(self),MT_GET,2,dest))
1097 if(type(self) == OT_TABLE) {
1098 if(raw) return false;
1099 return _table_ddel->Get(key,dest);
1104 if(raw)return false;
1105 return _array_ddel->Get(key,dest);
1107 if(sq_isnumeric(key)){
1108 SQInteger n=tointeger(key);
1109 if(abs(n)<_string(self)->_len){
1110 if(n<0)n=_string(self)->_len-n;
1111 dest=SQInteger(_stringval(self)[n]);
1117 if(raw)return false;
1118 return _string_ddel->Get(key,dest);
1122 if(raw)return false;
1123 Push(self);Push(key);
1124 if(!CallMetaMethod(_delegable(self),MT_GET,2,dest)) {
1125 return _instance_ddel->Get(key,dest);
1128 case OT_INTEGER:case OT_FLOAT:case OT_BOOL:
1129 if(raw)return false;
1130 return _number_ddel->Get(key,dest);
1132 if(raw)return false;
1133 return _generator_ddel->Get(key,dest);
1134 case OT_CLOSURE: case OT_NATIVECLOSURE:
1135 if(raw)return false;
1136 return _closure_ddel->Get(key,dest);
1138 if(raw)return false;
1139 return _thread_ddel->Get(key,dest);
1140 default:return false;
1145 bool SQVM::Set(const SQObjectPtr &self,const SQObjectPtr &key,const SQObjectPtr &val,bool fetchroot)
1149 if(_table(self)->Set(key,val))
1151 if(_table(self)->_delegate) {
1152 if(Set(_table(self)->_delegate,key,val,false)) {
1158 if(_delegable(self)->_delegate) {
1160 Push(self);Push(key);Push(val);
1161 if(CallMetaMethod(_delegable(self),MT_SET,3,t)) return true;
1165 if(_instance(self)->Set(key,val))
1168 Push(self);Push(key);Push(val);
1169 if(CallMetaMethod(_delegable(self),MT_SET,3,t)) return true;
1173 if(!sq_isnumeric(key)) {Raise_Error(_SC("indexing %s with %s"),GetTypeName(self),GetTypeName(key)); return false; }
1174 return _array(self)->Set(tointeger(key),val);
1176 Raise_Error(_SC("trying to set '%s'"),GetTypeName(self));
1180 if(_rawval(STK(0)) == _rawval(self) &&
1181 type(STK(0)) == type(self)) {
1182 return _table(_roottable)->Set(key,val);
1188 bool SQVM::Clone(const SQObjectPtr &self,SQObjectPtr &target)
1190 SQObjectPtr temp_reg;
1193 target = _table(self)->Clone();
1196 target = _instance(self)->Clone(_ss(this));
1198 if(_delegable(target)->_delegate){
1201 CallMetaMethod(_delegable(target),MT_CLONED,2,temp_reg);
1205 target=_array(self)->Clone();
1207 default: return false;
1211 bool SQVM::NewSlot(const SQObjectPtr &self,const SQObjectPtr &key,const SQObjectPtr &val)
1213 if(type(key) == OT_NULL) { Raise_Error(_SC("null cannot be used as index")); return false; }
1214 switch(type(self)) {
1216 bool rawcall = true;
1217 if(_table(self)->_delegate) {
1219 if(!_table(self)->Get(key,res)) {
1220 Push(self);Push(key);Push(val);
1221 rawcall = !CallMetaMethod(_table(self),MT_NEWSLOT,3,res);
1224 if(rawcall) _table(self)->NewSlot(key,val); //cannot fail
1228 if(!_class(self)->NewSlot(key,val)) {
1229 if(_class(self)->_locked) {
1230 Raise_Error(_SC("trying to modify a class that has already been instantiated"));
1234 SQObjectPtr oval = PrintObjVal(key);
1235 Raise_Error(_SC("the property '%s' already exists"),_stringval(oval));
1241 Raise_Error(_SC("indexing %s with %s"),GetTypeName(self),GetTypeName(key));
1248 bool SQVM::DeleteSlot(const SQObjectPtr &self,const SQObjectPtr &key,SQObjectPtr &res)
1250 switch(type(self)) {
1255 bool handled = false;
1256 if(_delegable(self)->_delegate) {
1257 Push(self);Push(key);
1258 handled = CallMetaMethod(_delegable(self),MT_DELSLOT,2,t);
1262 if(type(self) == OT_TABLE) {
1263 if(_table(self)->Get(key,t)) {
1264 _table(self)->Remove(key);
1267 Raise_IdxError((SQObject &)key);
1272 Raise_Error(_SC("cannot delete a slot from %s"),GetTypeName(self));
1280 Raise_Error(_SC("attempt to delete a slot from a %s"),GetTypeName(self));
1286 bool SQVM::Call(SQObjectPtr &closure,int nparams,int stackbase,SQObjectPtr &outres)
1289 int prevstackbase = _stackbase;
1291 switch(type(closure)) {
1293 return Execute(closure, _top - nparams, nparams, stackbase,outres);
1295 case OT_NATIVECLOSURE:{
1297 return CallNative(_nativeclosure(closure), nparams, stackbase, false, outres,suspend);
1302 return CreateClassInstance(_class(closure),nparams,stackbase,outres);
1309 assert(_stackbase == prevstackbase);
1315 bool SQVM::CallMetaMethod(SQDelegable *del,SQMetaMethod mm,int nparams,SQObjectPtr &outres)
1317 SQObjectPtr closure;
1318 if(del->GetMetaMethod(mm, closure)) {
1319 if(Call(closure, nparams, _top - nparams, outres)) {
1328 void SQVM::Remove(int n) {
1329 n = (n >= 0)?n + _stackbase - 1:_top + n;
1330 for(int i = n; i < _top; i++){
1331 _stack[i] = _stack[i+1];
1333 _stack[_top] = _null_;
1339 void SQVM::dumpstack(int stackbase,bool dumpall)
1341 int size=dumpall?_stack.size():_top;
1343 scprintf(_SC("\n>>>>stack dump<<<<\n"));
1344 CallInfo &ci=_callsstack.back();
1345 scprintf(_SC("IP: %d\n"),ci._ip);
1346 scprintf(_SC("prev stack base: %d\n"),ci._prevstkbase);
1347 scprintf(_SC("prev top: %d\n"),ci._prevtop);
1348 for(int i=0;i<size;i++){
1349 SQObjectPtr &obj=_stack[i];
1350 if(stackbase==i)scprintf(_SC(">"));else scprintf(_SC(" "));
1351 scprintf(_SC("[%d]:"),n);
1353 case OT_FLOAT: scprintf(_SC("FLOAT %.3f"),_float(obj));break;
1354 case OT_INTEGER: scprintf(_SC("INTEGER %d"),_integer(obj));break;
1355 case OT_BOOL: scprintf(_SC("BOOL %s"),_integer(obj)?"true":"false");break;
1356 case OT_STRING: scprintf(_SC("STRING %s"),_stringval(obj));break;
1357 case OT_NULL: scprintf(_SC("NULL")); break;
1358 case OT_TABLE: scprintf(_SC("TABLE %p[%p]"),_table(obj),_table(obj)->_delegate);break;
1359 case OT_ARRAY: scprintf(_SC("ARRAY %p"),_array(obj));break;
1360 case OT_CLOSURE: scprintf(_SC("CLOSURE [%p]"),_closure(obj));break;
1361 case OT_NATIVECLOSURE: scprintf(_SC("NATIVECLOSURE"));break;
1362 case OT_USERDATA: scprintf(_SC("USERDATA %p[%p]"),_userdataval(obj),_userdata(obj)->_delegate);break;
1363 case OT_GENERATOR: scprintf(_SC("GENERATOR"));break;
1364 case OT_THREAD: scprintf(_SC("THREAD [%p]"),_thread(obj));break;
1365 case OT_USERPOINTER: scprintf(_SC("USERPOINTER %p"),_userpointer(obj));break;
1366 case OT_CLASS: scprintf(_SC("CLASS %p"),_class(obj));break;
1367 case OT_INSTANCE: scprintf(_SC("INSTANCE %p"),_instance(obj));break;
1372 scprintf(_SC("\n"));