/* see copyright notice in squirrel.h */ #include "sqpcheader.h" #include #include #include "sqopcodes.h" #include "sqvm.h" #include "sqfuncproto.h" #include "sqclosure.h" #include "sqstring.h" #include "sqtable.h" #include "squserdata.h" #include "sqarray.h" #include "sqclass.h" #define TOP() (_stack._vals[_top-1]) bool SQVM::BW_OP(SQUnsignedInteger op,SQObjectPtr &trg,const SQObjectPtr &o1,const SQObjectPtr &o2) { SQInteger res; if((type(o1)|type(o2)) == OT_INTEGER) { SQInteger i1 = _integer(o1), i2 = _integer(o2); switch(op) { case BW_AND: res = i1 & i2; break; case BW_OR: res = i1 | i2; break; case BW_XOR: res = i1 ^ i2; break; case BW_SHIFTL: res = i1 << i2; break; case BW_SHIFTR: res = i1 >> i2; break; case BW_USHIFTR:res = (SQInteger)(*((SQUnsignedInteger*)&i1) >> i2); break; default: { Raise_Error(_SC("internal vm error bitwise op failed")); return false; } } } else { Raise_Error(_SC("bitwise op between '%s' and '%s'"),GetTypeName(o1),GetTypeName(o2)); return false;} trg = res; return true; } #define _ARITH_(op,trg,o1,o2) \ { \ SQInteger tmask = type(o1)|type(o2); \ switch(tmask) { \ case OT_INTEGER: trg = _integer(o1) op _integer(o2);break; \ case (OT_FLOAT|OT_INTEGER): \ case (OT_FLOAT): trg = tofloat(o1) op tofloat(o2); break;\ default: _GUARD(ARITH_OP((#op)[0],trg,o1,o2)); break;\ } \ } #define _ARITH_NOZERO(op,trg,o1,o2,err) \ { \ SQInteger tmask = type(o1)|type(o2); \ switch(tmask) { \ case OT_INTEGER: { SQInteger i2 = _integer(o2); if(i2 == 0) { Raise_Error(err); SQ_THROW(); } trg = _integer(o1) op i2; } break;\ case (OT_FLOAT|OT_INTEGER): \ case (OT_FLOAT): trg = tofloat(o1) op tofloat(o2); break;\ default: _GUARD(ARITH_OP((#op)[0],trg,o1,o2)); break;\ } \ } bool SQVM::ARITH_OP(SQUnsignedInteger op,SQObjectPtr &trg,const SQObjectPtr &o1,const SQObjectPtr &o2) { SQInteger tmask = type(o1)|type(o2); switch(tmask) { case OT_INTEGER:{ SQInteger res, i1 = _integer(o1), i2 = _integer(o2); switch(op) { case '+': res = i1 + i2; break; case '-': res = i1 - i2; break; case '/': if(i2 == 0) { Raise_Error(_SC("division by zero")); return false; } res = i1 / i2; break; case '*': res = i1 * i2; break; case '%': if(i2 == 0) { Raise_Error(_SC("modulo by zero")); return false; } res = i1 % i2; break; default: res = 0xDEADBEEF; } trg = res; } break; case (OT_FLOAT|OT_INTEGER): case (OT_FLOAT):{ SQFloat res, f1 = tofloat(o1), f2 = tofloat(o2); switch(op) { case '+': res = f1 + f2; break; case '-': res = f1 - f2; break; case '/': res = f1 / f2; break; case '*': res = f1 * f2; break; case '%': res = SQFloat(fmod((double)f1,(double)f2)); break; default: res = 0x0f; } trg = res; } break; default: if(op == '+' && (tmask & _RT_STRING)){ if(!StringCat(o1, o2, trg)) return false; } else if(!ArithMetaMethod(op,o1,o2,trg)) { return false; } } return true; } SQVM::SQVM(SQSharedState *ss) { _sharedstate=ss; _suspended = SQFalse; _suspended_target = -1; _suspended_root = SQFalse; _suspended_traps = -1; _foreignptr = NULL; _nnativecalls = 0; _nmetamethodscall = 0; _lasterror.Null(); _errorhandler.Null(); _debughook = false; _debughook_native = NULL; _debughook_closure.Null(); _openouters = NULL; ci = NULL; _releasehook = NULL; INIT_CHAIN();ADD_TO_CHAIN(&_ss(this)->_gc_chain,this); } void SQVM::Finalize() { if(_releasehook) { _releasehook(_foreignptr,0); _releasehook = NULL; } if(_openouters) CloseOuters(&_stack._vals[0]); _roottable.Null(); _lasterror.Null(); _errorhandler.Null(); _debughook = false; _debughook_native = NULL; _debughook_closure.Null(); temp_reg.Null(); _callstackdata.resize(0); SQInteger size=_stack.size(); for(SQInteger i=0;i_gc_chain,this); } bool SQVM::ArithMetaMethod(SQInteger op,const SQObjectPtr &o1,const SQObjectPtr &o2,SQObjectPtr &dest) { SQMetaMethod mm; switch(op){ case _SC('+'): mm=MT_ADD; break; case _SC('-'): mm=MT_SUB; break; case _SC('/'): mm=MT_DIV; break; case _SC('*'): mm=MT_MUL; break; case _SC('%'): mm=MT_MODULO; break; default: mm = MT_ADD; assert(0); break; //shutup compiler } if(is_delegable(o1) && _delegable(o1)->_delegate) { SQObjectPtr closure; if(_delegable(o1)->GetMetaMethod(this, mm, closure)) { Push(o1);Push(o2); return CallMetaMethod(closure,mm,2,dest); } } Raise_Error(_SC("arith op %c on between '%s' and '%s'"),op,GetTypeName(o1),GetTypeName(o2)); return false; } bool SQVM::NEG_OP(SQObjectPtr &trg,const SQObjectPtr &o) { switch(type(o)) { case OT_INTEGER: trg = -_integer(o); return true; case OT_FLOAT: trg = -_float(o); return true; case OT_TABLE: case OT_USERDATA: case OT_INSTANCE: if(_delegable(o)->_delegate) { SQObjectPtr closure; if(_delegable(o)->GetMetaMethod(this, MT_UNM, closure)) { Push(o); if(!CallMetaMethod(closure, MT_UNM, 1, temp_reg)) return false; _Swap(trg,temp_reg); return true; } } default:break; //shutup compiler } Raise_Error(_SC("attempt to negate a %s"), GetTypeName(o)); return false; } #define _RET_SUCCEED(exp) { result = (exp); return true; } bool SQVM::ObjCmp(const SQObjectPtr &o1,const SQObjectPtr &o2,SQInteger &result) { SQObjectType t1 = type(o1), t2 = type(o2); if(t1 == t2) { if(_rawval(o1) == _rawval(o2))_RET_SUCCEED(0); SQObjectPtr res; switch(t1){ case OT_STRING: _RET_SUCCEED(scstrcmp(_stringval(o1),_stringval(o2))); case OT_INTEGER: _RET_SUCCEED((_integer(o1)<_integer(o2))?-1:1); case OT_FLOAT: _RET_SUCCEED((_float(o1)<_float(o2))?-1:1); case OT_TABLE: case OT_USERDATA: case OT_INSTANCE: if(_delegable(o1)->_delegate) { SQObjectPtr closure; if(_delegable(o1)->GetMetaMethod(this, MT_CMP, closure)) { Push(o1);Push(o2); if(CallMetaMethod(closure,MT_CMP,2,res)) { if(type(res) != OT_INTEGER) { Raise_Error(_SC("_cmp must return an integer")); return false; } _RET_SUCCEED(_integer(res)) } return false; } } //continues through (no break needed) default: _RET_SUCCEED( _userpointer(o1) < _userpointer(o2)?-1:1 ); } assert(0); //if(type(res)!=OT_INTEGER) { Raise_CompareError(o1,o2); return false; } // _RET_SUCCEED(_integer(res)); } else{ if(sq_isnumeric(o1) && sq_isnumeric(o2)){ if((t1==OT_INTEGER) && (t2==OT_FLOAT)) { if( _integer(o1)==_float(o2) ) { _RET_SUCCEED(0); } else if( _integer(o1)<_float(o2) ) { _RET_SUCCEED(-1); } _RET_SUCCEED(1); } else{ if( _float(o1)==_integer(o2) ) { _RET_SUCCEED(0); } else if( _float(o1)<_integer(o2) ) { _RET_SUCCEED(-1); } _RET_SUCCEED(1); } } else if(t1==OT_NULL) {_RET_SUCCEED(-1);} else if(t2==OT_NULL) {_RET_SUCCEED(1);} else { Raise_CompareError(o1,o2); return false; } } assert(0); _RET_SUCCEED(0); //cannot happen } bool SQVM::CMP_OP(CmpOP op, const SQObjectPtr &o1,const SQObjectPtr &o2,SQObjectPtr &res) { SQInteger r; if(ObjCmp(o1,o2,r)) { switch(op) { case CMP_G: res = (r > 0); return true; case CMP_GE: res = (r >= 0); return true; case CMP_L: res = (r < 0); return true; case CMP_LE: res = (r <= 0); return true; case CMP_3W: res = r; return true; } assert(0); } return false; } bool SQVM::ToString(const SQObjectPtr &o,SQObjectPtr &res) { switch(type(o)) { case OT_STRING: res = o; return true; case OT_FLOAT: scsprintf(_sp(rsl(NUMBER_MAX_CHAR+1)),rsl(NUMBER_MAX_CHAR),_SC("%g"),_float(o)); break; case OT_INTEGER: scsprintf(_sp(rsl(NUMBER_MAX_CHAR+1)),rsl(NUMBER_MAX_CHAR),_PRINT_INT_FMT,_integer(o)); break; case OT_BOOL: scsprintf(_sp(rsl(6)),rsl(6),_integer(o)?_SC("true"):_SC("false")); break; case OT_TABLE: case OT_USERDATA: case OT_INSTANCE: if(_delegable(o)->_delegate) { SQObjectPtr closure; if(_delegable(o)->GetMetaMethod(this, MT_TOSTRING, closure)) { Push(o); if(CallMetaMethod(closure,MT_TOSTRING,1,res)) {; if(type(res) == OT_STRING) return true; } else { return false; } } } default: scsprintf(_sp(rsl(sizeof(void*)+20)),rsl(sizeof(void*)+20),_SC("(%s : 0x%p)"),GetTypeName(o),(void*)_rawval(o)); } res = SQString::Create(_ss(this),_spval); return true; } bool SQVM::StringCat(const SQObjectPtr &str,const SQObjectPtr &obj,SQObjectPtr &dest) { SQObjectPtr a, b; if(!ToString(str, a)) return false; if(!ToString(obj, b)) return false; SQInteger l = _string(a)->_len , ol = _string(b)->_len; SQChar *s = _sp(rsl(l + ol + 1)); memcpy(s, _stringval(a), rsl(l)); memcpy(s + l, _stringval(b), rsl(ol)); dest = SQString::Create(_ss(this), _spval, l + ol); return true; } bool SQVM::TypeOf(const SQObjectPtr &obj1,SQObjectPtr &dest) { if(is_delegable(obj1) && _delegable(obj1)->_delegate) { SQObjectPtr closure; if(_delegable(obj1)->GetMetaMethod(this, MT_TYPEOF, closure)) { Push(obj1); return CallMetaMethod(closure,MT_TYPEOF,1,dest); } } dest = SQString::Create(_ss(this),GetTypeName(obj1)); return true; } bool SQVM::Init(SQVM *friendvm, SQInteger stacksize) { _stack.resize(stacksize); _alloccallsstacksize = 4; _callstackdata.resize(_alloccallsstacksize); _callsstacksize = 0; _callsstack = &_callstackdata[0]; _stackbase = 0; _top = 0; if(!friendvm) { _roottable = SQTable::Create(_ss(this), 0); sq_base_register(this); } else { _roottable = friendvm->_roottable; _errorhandler = friendvm->_errorhandler; _debughook = friendvm->_debughook; _debughook_native = friendvm->_debughook_native; _debughook_closure = friendvm->_debughook_closure; } return true; } bool SQVM::StartCall(SQClosure *closure,SQInteger target,SQInteger args,SQInteger stackbase,bool tailcall) { SQFunctionProto *func = closure->_function; SQInteger paramssize = func->_nparameters; const SQInteger newtop = stackbase + func->_stacksize; SQInteger nargs = args; if(func->_varparams) { paramssize--; if (nargs < paramssize) { Raise_Error(_SC("wrong number of parameters")); return false; } //dumpstack(stackbase); SQInteger nvargs = nargs - paramssize; SQArray *arr = SQArray::Create(_ss(this),nvargs); SQInteger pbase = stackbase+paramssize; for(SQInteger n = 0; n < nvargs; n++) { arr->_values[n] = _stack._vals[pbase]; _stack._vals[pbase].Null(); pbase++; } _stack._vals[stackbase+paramssize] = arr; //dumpstack(stackbase); } else if (paramssize != nargs) { SQInteger ndef = func->_ndefaultparams; SQInteger diff; if(ndef && nargs < paramssize && (diff = paramssize - nargs) <= ndef) { for(SQInteger n = ndef - diff; n < ndef; n++) { _stack._vals[stackbase + (nargs++)] = closure->_defaultparams[n]; } } else { Raise_Error(_SC("wrong number of parameters")); return false; } } if(closure->_env) { _stack._vals[stackbase] = closure->_env->_obj; } if(!EnterFrame(stackbase, newtop, tailcall)) return false; ci->_closure = closure; ci->_literals = func->_literals; ci->_ip = func->_instructions; ci->_target = (SQInt32)target; if (_debughook) { CallDebugHook(_SC('c')); } if (closure->_function->_bgenerator) { SQFunctionProto *f = closure->_function; SQGenerator *gen = SQGenerator::Create(_ss(this), closure); if(!gen->Yield(this,f->_stacksize)) return false; SQObjectPtr temp; Return(1, target, temp); STK(target) = gen; } return true; } bool SQVM::Return(SQInteger _arg0, SQInteger _arg1, SQObjectPtr &retval) { SQBool _isroot = ci->_root; SQInteger callerbase = _stackbase - ci->_prevstkbase; if (_debughook) { for(SQInteger i=0; i_ncalls; i++) { CallDebugHook(_SC('r')); } } SQObjectPtr *dest; if (_isroot) { dest = &(retval); } else if (ci->_target == -1) { dest = NULL; } else { dest = &_stack._vals[callerbase + ci->_target]; } if (dest) { if(_arg0 != 0xFF) { *dest = _stack._vals[_stackbase+_arg1]; } else { dest->Null(); } //*dest = (_arg0 != 0xFF) ? _stack._vals[_stackbase+_arg1] : _null_; } LeaveFrame(); return _isroot ? true : false; } #define _RET_ON_FAIL(exp) { if(!exp) return false; } bool SQVM::PLOCAL_INC(SQInteger op,SQObjectPtr &target, SQObjectPtr &a, SQObjectPtr &incr) { SQObjectPtr trg; _RET_ON_FAIL(ARITH_OP( op , trg, a, incr)); target = a; a = trg; return true; } bool SQVM::DerefInc(SQInteger op,SQObjectPtr &target, SQObjectPtr &self, SQObjectPtr &key, SQObjectPtr &incr, bool postfix,SQInteger selfidx) { SQObjectPtr tmp, tself = self, tkey = key; if (!Get(tself, tkey, tmp, false, selfidx)) { return false; } _RET_ON_FAIL(ARITH_OP( op , target, tmp, incr)) if (!Set(tself, tkey, target,selfidx)) { return false; } if (postfix) target = tmp; return true; } #define arg0 (_i_._arg0) #define sarg0 ((SQInteger)*((signed char *)&_i_._arg0)) #define arg1 (_i_._arg1) #define sarg1 (*((SQInt32 *)&_i_._arg1)) #define arg2 (_i_._arg2) #define arg3 (_i_._arg3) #define sarg3 ((SQInteger)*((signed char *)&_i_._arg3)) SQRESULT SQVM::Suspend() { if (_suspended) return sq_throwerror(this, _SC("cannot suspend an already suspended vm")); if (_nnativecalls!=2) return sq_throwerror(this, _SC("cannot suspend through native calls/metamethods")); return SQ_SUSPEND_FLAG; } #define _FINISH(howmuchtojump) {jump = howmuchtojump; return true; } bool SQVM::FOREACH_OP(SQObjectPtr &o1,SQObjectPtr &o2,SQObjectPtr &o3,SQObjectPtr &o4,SQInteger arg_2,int exitpos,int &jump) { SQInteger nrefidx; switch(type(o1)) { case OT_TABLE: if((nrefidx = _table(o1)->Next(false,o4, o2, o3)) == -1) _FINISH(exitpos); o4 = (SQInteger)nrefidx; _FINISH(1); case OT_ARRAY: if((nrefidx = _array(o1)->Next(o4, o2, o3)) == -1) _FINISH(exitpos); o4 = (SQInteger) nrefidx; _FINISH(1); case OT_STRING: if((nrefidx = _string(o1)->Next(o4, o2, o3)) == -1)_FINISH(exitpos); o4 = (SQInteger)nrefidx; _FINISH(1); case OT_CLASS: if((nrefidx = _class(o1)->Next(o4, o2, o3)) == -1)_FINISH(exitpos); o4 = (SQInteger)nrefidx; _FINISH(1); case OT_USERDATA: case OT_INSTANCE: if(_delegable(o1)->_delegate) { SQObjectPtr itr; SQObjectPtr closure; if(_delegable(o1)->GetMetaMethod(this, MT_NEXTI, closure)) { Push(o1); Push(o4); if(CallMetaMethod(closure, MT_NEXTI, 2, itr)) { o4 = o2 = itr; if(type(itr) == OT_NULL) _FINISH(exitpos); if(!Get(o1, itr, o3, false, DONT_FALL_BACK)) { Raise_Error(_SC("_nexti returned an invalid idx")); // cloud be changed return false; } _FINISH(1); } else { return false; } } Raise_Error(_SC("_nexti failed")); return false; } break; case OT_GENERATOR: if(_generator(o1)->_state == SQGenerator::eDead) _FINISH(exitpos); if(_generator(o1)->_state == SQGenerator::eSuspended) { SQInteger idx = 0; if(type(o4) == OT_INTEGER) { idx = _integer(o4) + 1; } o2 = idx; o4 = idx; _generator(o1)->Resume(this, o3); _FINISH(0); } default: Raise_Error(_SC("cannot iterate %s"), GetTypeName(o1)); } return false; //cannot be hit(just to avoid warnings) } #define COND_LITERAL (arg3!=0?ci->_literals[arg1]:STK(arg1)) #define SQ_THROW() { goto exception_trap; } #define _GUARD(exp) { if(!exp) { SQ_THROW();} } bool SQVM::CLOSURE_OP(SQObjectPtr &target, SQFunctionProto *func) { SQInteger nouters; SQClosure *closure = SQClosure::Create(_ss(this), func,_table(_roottable)->GetWeakRef(OT_TABLE)); if((nouters = func->_noutervalues)) { for(SQInteger i = 0; i_outervalues[i]; switch(v._type){ case otLOCAL: FindOuter(closure->_outervalues[i], &STK(_integer(v._src))); break; case otOUTER: closure->_outervalues[i] = _closure(ci->_closure)->_outervalues[_integer(v._src)]; break; } } } SQInteger ndefparams; if((ndefparams = func->_ndefaultparams)) { for(SQInteger i = 0; i < ndefparams; i++) { SQInteger spos = func->_defaultparams[i]; closure->_defaultparams[i] = _stack._vals[_stackbase + spos]; } } target = closure; return true; } bool SQVM::CLASS_OP(SQObjectPtr &target,SQInteger baseclass,SQInteger attributes) { SQClass *base = NULL; SQObjectPtr attrs; if(baseclass != -1) { if(type(_stack._vals[_stackbase+baseclass]) != OT_CLASS) { Raise_Error(_SC("trying to inherit from a %s"),GetTypeName(_stack._vals[_stackbase+baseclass])); return false; } base = _class(_stack._vals[_stackbase + baseclass]); } if(attributes != MAX_FUNC_STACKSIZE) { attrs = _stack._vals[_stackbase+attributes]; } target = SQClass::Create(_ss(this),base); if(type(_class(target)->_metamethods[MT_INHERITED]) != OT_NULL) { int nparams = 2; SQObjectPtr ret; Push(target); Push(attrs); if(!Call(_class(target)->_metamethods[MT_INHERITED],nparams,_top - nparams, ret, false)) { Pop(nparams); return false; } Pop(nparams); } _class(target)->_attributes = attrs; return true; } bool SQVM::IsEqual(const SQObjectPtr &o1,const SQObjectPtr &o2,bool &res) { if(type(o1) == type(o2)) { res = (_rawval(o1) == _rawval(o2)); } else { if(sq_isnumeric(o1) && sq_isnumeric(o2)) { res = (tofloat(o1) == tofloat(o2)); } else { res = false; } } return true; } bool SQVM::IsFalse(SQObjectPtr &o) { if(((type(o) & SQOBJECT_CANBEFALSE) && ( ((type(o) == OT_FLOAT) && (_float(o) == SQFloat(0.0))) )) #if !defined(SQUSEDOUBLE) || (defined(SQUSEDOUBLE) && defined(_SQ64)) || (_integer(o) == 0) ) //OT_NULL|OT_INTEGER|OT_BOOL #else || (((type(o) != OT_FLOAT) && (_integer(o) == 0))) ) //OT_NULL|OT_INTEGER|OT_BOOL #endif { return true; } return false; } extern SQInstructionDesc g_InstrDesc[]; bool SQVM::Execute(SQObjectPtr &closure, SQInteger nargs, SQInteger stackbase,SQObjectPtr &outres, SQBool raiseerror,ExecutionType et) { if ((_nnativecalls + 1) > MAX_NATIVE_CALLS) { Raise_Error(_SC("Native stack overflow")); return false; } _nnativecalls++; AutoDec ad(&_nnativecalls); SQInteger traps = 0; CallInfo *prevci = ci; switch(et) { case ET_CALL: { temp_reg = closure; if(!StartCall(_closure(temp_reg), _top - nargs, nargs, stackbase, false)) { //call the handler if there are no calls in the stack, if not relies on the previous node if(ci == NULL) CallErrorHandler(_lasterror); return false; } if(ci == prevci) { outres = STK(_top-nargs); return true; } ci->_root = SQTrue; } break; case ET_RESUME_GENERATOR: _generator(closure)->Resume(this, outres); ci->_root = SQTrue; traps += ci->_etraps; break; case ET_RESUME_VM: case ET_RESUME_THROW_VM: traps = _suspended_traps; ci->_root = _suspended_root; _suspended = SQFalse; if(et == ET_RESUME_THROW_VM) { SQ_THROW(); } break; } exception_restore: // { for(;;) { const SQInstruction &_i_ = *ci->_ip++; //dumpstack(_stackbase); //scprintf("\n[%d] %s %d %d %d %d\n",ci->_ip-_closure(ci->_closure)->_function->_instructions,g_InstrDesc[_i_.op].name,arg0,arg1,arg2,arg3); switch(_i_.op) { case _OP_LINE: if (_debughook) CallDebugHook(_SC('l'),arg1); continue; case _OP_LOAD: TARGET = ci->_literals[arg1]; continue; case _OP_LOADINT: #ifndef _SQ64 TARGET = (SQInteger)arg1; continue; #else TARGET = (SQInteger)((SQUnsignedInteger32)arg1); continue; #endif case _OP_LOADFLOAT: TARGET = *((SQFloat *)&arg1); continue; case _OP_DLOAD: TARGET = ci->_literals[arg1]; STK(arg2) = ci->_literals[arg3];continue; case _OP_TAILCALL:{ SQObjectPtr &t = STK(arg1); if (type(t) == OT_CLOSURE && (!_closure(t)->_function->_bgenerator)){ SQObjectPtr clo = t; if(_openouters) CloseOuters(&(_stack._vals[_stackbase])); for (SQInteger i = 0; i < arg3; i++) STK(i) = STK(arg2 + i); _GUARD(StartCall(_closure(clo), ci->_target, arg3, _stackbase, true)); continue; } } case _OP_CALL: { SQObjectPtr clo = STK(arg1); switch (type(clo)) { case OT_CLOSURE: _GUARD(StartCall(_closure(clo), sarg0, arg3, _stackbase+arg2, false)); continue; case OT_NATIVECLOSURE: { bool suspend; _GUARD(CallNative(_nativeclosure(clo), arg3, _stackbase+arg2, clo,suspend)); if(suspend){ _suspended = SQTrue; _suspended_target = sarg0; _suspended_root = ci->_root; _suspended_traps = traps; outres = clo; return true; } if(sarg0 != -1) { STK(arg0) = clo; } } continue; case OT_CLASS:{ SQObjectPtr inst; _GUARD(CreateClassInstance(_class(clo),inst,clo)); if(sarg0 != -1) { STK(arg0) = inst; } SQInteger stkbase; switch(type(clo)) { case OT_CLOSURE: stkbase = _stackbase+arg2; _stack._vals[stkbase] = inst; _GUARD(StartCall(_closure(clo), -1, arg3, stkbase, false)); break; case OT_NATIVECLOSURE: bool suspend; stkbase = _stackbase+arg2; _stack._vals[stkbase] = inst; _GUARD(CallNative(_nativeclosure(clo), arg3, stkbase, clo,suspend)); break; default: break; //shutup GCC 4.x } } break; case OT_TABLE: case OT_USERDATA: case OT_INSTANCE:{ SQObjectPtr closure; if(_delegable(clo)->_delegate && _delegable(clo)->GetMetaMethod(this,MT_CALL,closure)) { Push(clo); for (SQInteger i = 0; i < arg3; i++) Push(STK(arg2 + i)); if(!CallMetaMethod(closure, MT_CALL, arg3+1, clo)) SQ_THROW(); if(sarg0 != -1) { STK(arg0) = clo; } break; } //Raise_Error(_SC("attempt to call '%s'"), GetTypeName(clo)); //SQ_THROW(); } default: Raise_Error(_SC("attempt to call '%s'"), GetTypeName(clo)); SQ_THROW(); } } continue; case _OP_PREPCALL: case _OP_PREPCALLK: { SQObjectPtr &key = _i_.op == _OP_PREPCALLK?(ci->_literals)[arg1]:STK(arg1); SQObjectPtr &o = STK(arg2); if (!Get(o, key, temp_reg,false,arg2)) { SQ_THROW(); } STK(arg3) = o; _Swap(TARGET,temp_reg);//TARGET = temp_reg; } continue; case _OP_GETK: if (!Get(STK(arg2), ci->_literals[arg1], temp_reg, false,arg2)) { SQ_THROW();} _Swap(TARGET,temp_reg);//TARGET = temp_reg; continue; case _OP_MOVE: TARGET = STK(arg1); continue; case _OP_NEWSLOT: _GUARD(NewSlot(STK(arg1), STK(arg2), STK(arg3),false)); if(arg0 != 0xFF) TARGET = STK(arg3); continue; case _OP_DELETE: _GUARD(DeleteSlot(STK(arg1), STK(arg2), TARGET)); continue; case _OP_SET: if (!Set(STK(arg1), STK(arg2), STK(arg3),arg1)) { SQ_THROW(); } if (arg0 != 0xFF) TARGET = STK(arg3); continue; case _OP_GET: if (!Get(STK(arg1), STK(arg2), temp_reg, false,arg1)) { SQ_THROW(); } _Swap(TARGET,temp_reg);//TARGET = temp_reg; continue; case _OP_EQ:{ bool res; if(!IsEqual(STK(arg2),COND_LITERAL,res)) { SQ_THROW(); } TARGET = res?true:false; }continue; case _OP_NE:{ bool res; if(!IsEqual(STK(arg2),COND_LITERAL,res)) { SQ_THROW(); } TARGET = (!res)?true:false; } continue; case _OP_ADD: _ARITH_(+,TARGET,STK(arg2),STK(arg1)); continue; case _OP_SUB: _ARITH_(-,TARGET,STK(arg2),STK(arg1)); continue; case _OP_MUL: _ARITH_(*,TARGET,STK(arg2),STK(arg1)); continue; case _OP_DIV: _ARITH_NOZERO(/,TARGET,STK(arg2),STK(arg1),_SC("division by zero")); continue; case _OP_MOD: ARITH_OP('%',TARGET,STK(arg2),STK(arg1)); continue; case _OP_BITW: _GUARD(BW_OP( arg3,TARGET,STK(arg2),STK(arg1))); continue; case _OP_RETURN: if((ci)->_generator) { (ci)->_generator->Kill(); } if(Return(arg0, arg1, temp_reg)){ assert(traps==0); //outres = temp_reg; _Swap(outres,temp_reg); return true; } continue; case _OP_LOADNULLS:{ for(SQInt32 n=0; n < arg1; n++) STK(arg0+n).Null(); }continue; case _OP_LOADROOT: { SQWeakRef *w = _closure(ci->_closure)->_root; if(type(w->_obj) != OT_NULL) { TARGET = w->_obj; } else { TARGET = _roottable; //shoud this be like this? or null } } continue; case _OP_LOADBOOL: TARGET = arg1?true:false; continue; case _OP_DMOVE: STK(arg0) = STK(arg1); STK(arg2) = STK(arg3); continue; case _OP_JMP: ci->_ip += (sarg1); continue; //case _OP_JNZ: if(!IsFalse(STK(arg0))) ci->_ip+=(sarg1); continue; case _OP_JCMP: _GUARD(CMP_OP((CmpOP)arg3,STK(arg2),STK(arg0),temp_reg)); if(IsFalse(temp_reg)) ci->_ip+=(sarg1); continue; case _OP_JZ: if(IsFalse(STK(arg0))) ci->_ip+=(sarg1); continue; case _OP_GETOUTER: { SQClosure *cur_cls = _closure(ci->_closure); SQOuter *otr = _outer(cur_cls->_outervalues[arg1]); TARGET = *(otr->_valptr); } continue; case _OP_SETOUTER: { SQClosure *cur_cls = _closure(ci->_closure); SQOuter *otr = _outer(cur_cls->_outervalues[arg1]); *(otr->_valptr) = STK(arg2); if(arg0 != 0xFF) { TARGET = STK(arg2); } } continue; case _OP_NEWOBJ: switch(arg3) { case NOT_TABLE: TARGET = SQTable::Create(_ss(this), arg1); continue; case NOT_ARRAY: TARGET = SQArray::Create(_ss(this), 0); _array(TARGET)->Reserve(arg1); continue; case NOT_CLASS: _GUARD(CLASS_OP(TARGET,arg1,arg2)); continue; default: assert(0); continue; } case _OP_APPENDARRAY: { SQObject val; val._unVal.raw = 0; switch(arg2) { case AAT_STACK: val = STK(arg1); break; case AAT_LITERAL: val = ci->_literals[arg1]; break; case AAT_INT: val._type = OT_INTEGER; #ifndef _SQ64 val._unVal.nInteger = (SQInteger)arg1; #else val._unVal.nInteger = (SQInteger)((SQUnsignedInteger32)arg1); #endif break; case AAT_FLOAT: val._type = OT_FLOAT; val._unVal.fFloat = *((SQFloat *)&arg1); break; case AAT_BOOL: val._type = OT_BOOL; val._unVal.nInteger = arg1; break; default: assert(0); break; } _array(STK(arg0))->Append(val); continue; } case _OP_COMPARITH: { SQInteger selfidx = (((SQUnsignedInteger)arg1&0xFFFF0000)>>16); _GUARD(DerefInc(arg3, TARGET, STK(selfidx), STK(arg2), STK(arg1&0x0000FFFF), false, selfidx)); } continue; case _OP_INC: {SQObjectPtr o(sarg3); _GUARD(DerefInc('+',TARGET, STK(arg1), STK(arg2), o, false, arg1));} continue; case _OP_INCL: { SQObjectPtr &a = STK(arg1); if(type(a) == OT_INTEGER) { a._unVal.nInteger = _integer(a) + sarg3; } else { SQObjectPtr o(sarg3); //_GUARD(LOCAL_INC('+',TARGET, STK(arg1), o)); _ARITH_(+,a,a,o); } } continue; case _OP_PINC: {SQObjectPtr o(sarg3); _GUARD(DerefInc('+',TARGET, STK(arg1), STK(arg2), o, true, arg1));} continue; case _OP_PINCL: { SQObjectPtr &a = STK(arg1); if(type(a) == OT_INTEGER) { TARGET = a; a._unVal.nInteger = _integer(a) + sarg3; } else { SQObjectPtr o(sarg3); _GUARD(PLOCAL_INC('+',TARGET, STK(arg1), o)); } } continue; case _OP_CMP: _GUARD(CMP_OP((CmpOP)arg3,STK(arg2),STK(arg1),TARGET)) continue; case _OP_EXISTS: TARGET = Get(STK(arg1), STK(arg2), temp_reg, true, EXISTS_FALL_BACK)?true:false;continue; case _OP_INSTANCEOF: if(type(STK(arg1)) != OT_CLASS) {Raise_Error(_SC("cannot apply instanceof between a %s and a %s"),GetTypeName(STK(arg1)),GetTypeName(STK(arg2))); SQ_THROW();} TARGET = (type(STK(arg2)) == OT_INSTANCE) ? (_instance(STK(arg2))->InstanceOf(_class(STK(arg1)))?true:false) : false; continue; case _OP_AND: if(IsFalse(STK(arg2))) { TARGET = STK(arg2); ci->_ip += (sarg1); } continue; case _OP_OR: if(!IsFalse(STK(arg2))) { TARGET = STK(arg2); ci->_ip += (sarg1); } continue; case _OP_NEG: _GUARD(NEG_OP(TARGET,STK(arg1))); continue; case _OP_NOT: TARGET = IsFalse(STK(arg1)); continue; case _OP_BWNOT: if(type(STK(arg1)) == OT_INTEGER) { SQInteger t = _integer(STK(arg1)); TARGET = SQInteger(~t); continue; } Raise_Error(_SC("attempt to perform a bitwise op on a %s"), GetTypeName(STK(arg1))); SQ_THROW(); case _OP_CLOSURE: { SQClosure *c = ci->_closure._unVal.pClosure; SQFunctionProto *fp = c->_function; if(!CLOSURE_OP(TARGET,fp->_functions[arg1]._unVal.pFunctionProto)) { SQ_THROW(); } continue; } case _OP_YIELD:{ if(ci->_generator) { if(sarg1 != MAX_FUNC_STACKSIZE) temp_reg = STK(arg1); _GUARD(ci->_generator->Yield(this,arg2)); traps -= ci->_etraps; if(sarg1 != MAX_FUNC_STACKSIZE) _Swap(STK(arg1),temp_reg);//STK(arg1) = temp_reg; } else { Raise_Error(_SC("trying to yield a '%s',only genenerator can be yielded"), GetTypeName(ci->_generator)); SQ_THROW();} if(Return(arg0, arg1, temp_reg)){ assert(traps == 0); outres = temp_reg; return true; } } continue; case _OP_RESUME: if(type(STK(arg1)) != OT_GENERATOR){ Raise_Error(_SC("trying to resume a '%s',only genenerator can be resumed"), GetTypeName(STK(arg1))); SQ_THROW();} _GUARD(_generator(STK(arg1))->Resume(this, TARGET)); traps += ci->_etraps; continue; case _OP_FOREACH:{ int tojump; _GUARD(FOREACH_OP(STK(arg0),STK(arg2),STK(arg2+1),STK(arg2+2),arg2,sarg1,tojump)); ci->_ip += tojump; } continue; case _OP_POSTFOREACH: assert(type(STK(arg0)) == OT_GENERATOR); if(_generator(STK(arg0))->_state == SQGenerator::eDead) ci->_ip += (sarg1 - 1); continue; case _OP_CLONE: _GUARD(Clone(STK(arg1), TARGET)); continue; case _OP_TYPEOF: _GUARD(TypeOf(STK(arg1), TARGET)) continue; case _OP_PUSHTRAP:{ SQInstruction *_iv = _closure(ci->_closure)->_function->_instructions; _etraps.push_back(SQExceptionTrap(_top,_stackbase, &_iv[(ci->_ip-_iv)+arg1], arg0)); traps++; ci->_etraps++; } continue; case _OP_POPTRAP: { for(SQInteger i = 0; i < arg0; i++) { _etraps.pop_back(); traps--; ci->_etraps--; } } continue; case _OP_THROW: Raise_Error(TARGET); SQ_THROW(); continue; case _OP_NEWSLOTA: _GUARD(NewSlotA(STK(arg1),STK(arg2),STK(arg3),(arg0&NEW_SLOT_ATTRIBUTES_FLAG) ? STK(arg2-1) : SQObjectPtr(),(arg0&NEW_SLOT_STATIC_FLAG)?true:false,false)); continue; case _OP_GETBASE:{ SQClosure *clo = _closure(ci->_closure); if(clo->_base) { TARGET = clo->_base; } else { TARGET.Null(); } continue; } case _OP_CLOSE: if(_openouters) CloseOuters(&(STK(arg1))); continue; } } } exception_trap: { SQObjectPtr currerror = _lasterror; // dumpstack(_stackbase); // SQInteger n = 0; SQInteger last_top = _top; if(_ss(this)->_notifyallexceptions || (!traps && raiseerror)) CallErrorHandler(currerror); while( ci ) { if(ci->_etraps > 0) { SQExceptionTrap &et = _etraps.top(); ci->_ip = et._ip; _top = et._stacksize; _stackbase = et._stackbase; _stack._vals[_stackbase + et._extarget] = currerror; _etraps.pop_back(); traps--; ci->_etraps--; while(last_top >= _top) _stack._vals[last_top--].Null(); goto exception_restore; } else if (_debughook) { //notify debugger of a "return" //even if it really an exception unwinding the stack for(SQInteger i = 0; i < ci->_ncalls; i++) { CallDebugHook(_SC('r')); } } if(ci->_generator) ci->_generator->Kill(); bool mustbreak = ci && ci->_root; LeaveFrame(); if(mustbreak) break; } _lasterror = currerror; return false; } assert(0); } bool SQVM::CreateClassInstance(SQClass *theclass, SQObjectPtr &inst, SQObjectPtr &constructor) { inst = theclass->CreateInstance(); if(!theclass->GetConstructor(constructor)) { constructor.Null(); } return true; } void SQVM::CallErrorHandler(SQObjectPtr &error) { if(type(_errorhandler) != OT_NULL) { SQObjectPtr out; Push(_roottable); Push(error); Call(_errorhandler, 2, _top-2, out,SQFalse); Pop(2); } } void SQVM::CallDebugHook(SQInteger type,SQInteger forcedline) { _debughook = false; SQFunctionProto *func=_closure(ci->_closure)->_function; if(_debughook_native) { const SQChar *src = type(func->_sourcename) == OT_STRING?_stringval(func->_sourcename):NULL; const SQChar *fname = type(func->_name) == OT_STRING?_stringval(func->_name):NULL; SQInteger line = forcedline?forcedline:func->GetLine(ci->_ip); _debughook_native(this,type,src,line,fname); } else { SQObjectPtr temp_reg; SQInteger nparams=5; Push(_roottable); Push(type); Push(func->_sourcename); Push(forcedline?forcedline:func->GetLine(ci->_ip)); Push(func->_name); Call(_debughook_closure,nparams,_top-nparams,temp_reg,SQFalse); Pop(nparams); } _debughook = true; } bool SQVM::CallNative(SQNativeClosure *nclosure, SQInteger nargs, SQInteger newbase, SQObjectPtr &retval, bool &suspend) { SQInteger nparamscheck = nclosure->_nparamscheck; SQInteger newtop = newbase + nargs + nclosure->_noutervalues; if (_nnativecalls + 1 > MAX_NATIVE_CALLS) { Raise_Error(_SC("Native stack overflow")); return false; } if(nparamscheck && (((nparamscheck > 0) && (nparamscheck != nargs)) || ((nparamscheck < 0) && (nargs < (-nparamscheck))))) { Raise_Error(_SC("wrong number of parameters")); return false; } SQInteger tcs; SQIntVec &tc = nclosure->_typecheck; if((tcs = tc.size())) { for(SQInteger i = 0; i < nargs && i < tcs; i++) { if((tc._vals[i] != -1) && !(type(_stack._vals[newbase+i]) & tc._vals[i])) { Raise_ParamTypeError(i,tc._vals[i],type(_stack._vals[newbase+i])); return false; } } } if(!EnterFrame(newbase, newtop, false)) return false; ci->_closure = nclosure; SQInteger outers = nclosure->_noutervalues; for (SQInteger i = 0; i < outers; i++) { _stack._vals[newbase+nargs+i] = nclosure->_outervalues[i]; } if(nclosure->_env) { _stack._vals[newbase] = nclosure->_env->_obj; } _nnativecalls++; SQInteger ret = (nclosure->_function)(this); _nnativecalls--; suspend = false; if (ret == SQ_SUSPEND_FLAG) { suspend = true; } else if (ret < 0) { LeaveFrame(); Raise_Error(_lasterror); return false; } if(ret) { retval = _stack._vals[_top-1]; } else { retval.Null(); } //retval = ret ? _stack._vals[_top-1] : _null_; LeaveFrame(); return true; } #define FALLBACK_OK 0 #define FALLBACK_NO_MATCH 1 #define FALLBACK_ERROR 2 bool SQVM::Get(const SQObjectPtr &self,const SQObjectPtr &key,SQObjectPtr &dest,bool raw, SQInteger selfidx) { switch(type(self)){ case OT_TABLE: if(_table(self)->Get(key,dest))return true; break; case OT_ARRAY: if(sq_isnumeric(key)) { if(_array(self)->Get(tointeger(key),dest)) { return true; } if(selfidx != EXISTS_FALL_BACK) Raise_IdxError(key); return false; } break; case OT_INSTANCE: if(_instance(self)->Get(key,dest)) return true; break; case OT_CLASS: if(_class(self)->Get(key,dest)) return true; break; case OT_STRING: if(sq_isnumeric(key)){ SQInteger n = tointeger(key); if(abs((int)n) < _string(self)->_len) { if(n < 0) n = _string(self)->_len - n; dest = SQInteger(_stringval(self)[n]); return true; } if(selfidx != EXISTS_FALL_BACK) Raise_IdxError(key); return false; } break; default:break; //shut up compiler } if(!raw) { switch(FallBackGet(self,key,dest)) { case FALLBACK_OK: return true; //okie case FALLBACK_NO_MATCH: break; //keep falling back case FALLBACK_ERROR: return false; // the metamethod failed } if(InvokeDefaultDelegate(self,key,dest)) { return true; } } //#ifdef ROOT_FALLBACK if(selfidx == 0) { SQWeakRef *w = _closure(ci->_closure)->_root; if(type(w->_obj) != OT_NULL) { if(Get(*((const SQObjectPtr *)&w->_obj),key,dest,false,DONT_FALL_BACK)) return true; } } //#endif if(selfidx != EXISTS_FALL_BACK) Raise_IdxError(key); return false; } bool SQVM::InvokeDefaultDelegate(const SQObjectPtr &self,const SQObjectPtr &key,SQObjectPtr &dest) { SQTable *ddel = NULL; switch(type(self)) { case OT_CLASS: ddel = _class_ddel; break; case OT_TABLE: ddel = _table_ddel; break; case OT_ARRAY: ddel = _array_ddel; break; case OT_STRING: ddel = _string_ddel; break; case OT_INSTANCE: ddel = _instance_ddel; break; case OT_INTEGER:case OT_FLOAT:case OT_BOOL: ddel = _number_ddel; break; case OT_GENERATOR: ddel = _generator_ddel; break; case OT_CLOSURE: case OT_NATIVECLOSURE: ddel = _closure_ddel; break; case OT_THREAD: ddel = _thread_ddel; break; case OT_WEAKREF: ddel = _weakref_ddel; break; default: return false; } return ddel->Get(key,dest); } SQInteger SQVM::FallBackGet(const SQObjectPtr &self,const SQObjectPtr &key,SQObjectPtr &dest) { switch(type(self)){ case OT_TABLE: case OT_USERDATA: //delegation if(_delegable(self)->_delegate) { if(Get(SQObjectPtr(_delegable(self)->_delegate),key,dest,false,DONT_FALL_BACK)) return FALLBACK_OK; } else { return FALLBACK_NO_MATCH; } //go through case OT_INSTANCE: { SQObjectPtr closure; if(_delegable(self)->GetMetaMethod(this, MT_GET, closure)) { Push(self);Push(key); _nmetamethodscall++; AutoDec ad(&_nmetamethodscall); if(Call(closure, 2, _top - 2, dest, SQFalse)) { Pop(2); return FALLBACK_OK; } else { Pop(2); if(type(_lasterror) != OT_NULL) { //NULL means "clean failure" (not found) return FALLBACK_ERROR; } } } } break; default: break;//shutup GCC 4.x } // no metamethod or no fallback type return FALLBACK_NO_MATCH; } bool SQVM::Set(const SQObjectPtr &self,const SQObjectPtr &key,const SQObjectPtr &val,SQInteger selfidx) { switch(type(self)){ case OT_TABLE: if(_table(self)->Set(key,val)) return true; break; case OT_INSTANCE: if(_instance(self)->Set(key,val)) return true; break; case OT_ARRAY: if(!sq_isnumeric(key)) { Raise_Error(_SC("indexing %s with %s"),GetTypeName(self),GetTypeName(key)); return false; } if(!_array(self)->Set(tointeger(key),val)) { Raise_IdxError(key); return false; } return true; default: Raise_Error(_SC("trying to set '%s'"),GetTypeName(self)); return false; } switch(FallBackSet(self,key,val)) { case FALLBACK_OK: return true; //okie case FALLBACK_NO_MATCH: break; //keep falling back case FALLBACK_ERROR: return false; // the metamethod failed } if(selfidx == 0) { if(_table(_roottable)->Set(key,val)) return true; } Raise_IdxError(key); return false; } SQInteger SQVM::FallBackSet(const SQObjectPtr &self,const SQObjectPtr &key,const SQObjectPtr &val) { switch(type(self)) { case OT_TABLE: if(_table(self)->_delegate) { if(Set(_table(self)->_delegate,key,val,DONT_FALL_BACK)) return FALLBACK_OK; } //keps on going case OT_INSTANCE: case OT_USERDATA:{ SQObjectPtr closure; SQObjectPtr t; if(_delegable(self)->GetMetaMethod(this, MT_SET, closure)) { Push(self);Push(key);Push(val); _nmetamethodscall++; AutoDec ad(&_nmetamethodscall); if(Call(closure, 3, _top - 3, t, SQFalse)) { Pop(3); return FALLBACK_OK; } else { if(type(_lasterror) != OT_NULL) { //NULL means "clean failure" (not found) //error Pop(3); return FALLBACK_ERROR; } } } } break; default: break;//shutup GCC 4.x } // no metamethod or no fallback type return FALLBACK_NO_MATCH; } bool SQVM::Clone(const SQObjectPtr &self,SQObjectPtr &target) { SQObjectPtr temp_reg; SQObjectPtr newobj; switch(type(self)){ case OT_TABLE: newobj = _table(self)->Clone(); goto cloned_mt; case OT_INSTANCE: { newobj = _instance(self)->Clone(_ss(this)); cloned_mt: SQObjectPtr closure; if(_delegable(newobj)->_delegate && _delegable(newobj)->GetMetaMethod(this,MT_CLONED,closure)) { Push(newobj); Push(self); if(!CallMetaMethod(closure,MT_CLONED,2,temp_reg)) return false; } } target = newobj; return true; case OT_ARRAY: target = _array(self)->Clone(); return true; default: Raise_Error(_SC("cloning a %s"), GetTypeName(self)); return false; } } bool SQVM::NewSlotA(const SQObjectPtr &self,const SQObjectPtr &key,const SQObjectPtr &val,const SQObjectPtr &attrs,bool bstatic,bool raw) { if(type(self) != OT_CLASS) { Raise_Error(_SC("object must be a class")); return false; } SQClass *c = _class(self); if(!raw) { SQObjectPtr &mm = c->_metamethods[MT_NEWMEMBER]; if(type(mm) != OT_NULL ) { Push(self); Push(key); Push(val); Push(attrs); Push(bstatic); return CallMetaMethod(mm,MT_NEWMEMBER,5,temp_reg); } } if(!NewSlot(self, key, val,bstatic)) return false; if(type(attrs) != OT_NULL) { c->SetAttributes(key,attrs); } return true; } bool SQVM::NewSlot(const SQObjectPtr &self,const SQObjectPtr &key,const SQObjectPtr &val,bool bstatic) { if(type(key) == OT_NULL) { Raise_Error(_SC("null cannot be used as index")); return false; } switch(type(self)) { case OT_TABLE: { bool rawcall = true; if(_table(self)->_delegate) { SQObjectPtr res; if(!_table(self)->Get(key,res)) { SQObjectPtr closure; if(_delegable(self)->_delegate && _delegable(self)->GetMetaMethod(this,MT_NEWSLOT,closure)) { Push(self);Push(key);Push(val); if(!CallMetaMethod(closure,MT_NEWSLOT,3,res)) { return false; } rawcall = false; } else { rawcall = true; } } } if(rawcall) _table(self)->NewSlot(key,val); //cannot fail break;} case OT_INSTANCE: { SQObjectPtr res; SQObjectPtr closure; if(_delegable(self)->_delegate && _delegable(self)->GetMetaMethod(this,MT_NEWSLOT,closure)) { Push(self);Push(key);Push(val); if(!CallMetaMethod(closure,MT_NEWSLOT,3,res)) { return false; } break; } Raise_Error(_SC("class instances do not support the new slot operator")); return false; break;} case OT_CLASS: if(!_class(self)->NewSlot(_ss(this),key,val,bstatic)) { if(_class(self)->_locked) { Raise_Error(_SC("trying to modify a class that has already been instantiated")); return false; } else { SQObjectPtr oval = PrintObjVal(key); Raise_Error(_SC("the property '%s' already exists"),_stringval(oval)); return false; } } break; default: Raise_Error(_SC("indexing %s with %s"),GetTypeName(self),GetTypeName(key)); return false; break; } return true; } bool SQVM::DeleteSlot(const SQObjectPtr &self,const SQObjectPtr &key,SQObjectPtr &res) { switch(type(self)) { case OT_TABLE: case OT_INSTANCE: case OT_USERDATA: { SQObjectPtr t; //bool handled = false; SQObjectPtr closure; if(_delegable(self)->_delegate && _delegable(self)->GetMetaMethod(this,MT_DELSLOT,closure)) { Push(self);Push(key); return CallMetaMethod(closure,MT_DELSLOT,2,res); } else { if(type(self) == OT_TABLE) { if(_table(self)->Get(key,t)) { _table(self)->Remove(key); } else { Raise_IdxError((SQObject &)key); return false; } } else { Raise_Error(_SC("cannot delete a slot from %s"),GetTypeName(self)); return false; } } res = t; } break; default: Raise_Error(_SC("attempt to delete a slot from a %s"),GetTypeName(self)); return false; } return true; } bool SQVM::Call(SQObjectPtr &closure,SQInteger nparams,SQInteger stackbase,SQObjectPtr &outres,SQBool raiseerror) { #ifdef _DEBUG SQInteger prevstackbase = _stackbase; #endif switch(type(closure)) { case OT_CLOSURE: return Execute(closure, nparams, stackbase, outres, raiseerror); break; case OT_NATIVECLOSURE:{ bool suspend; return CallNative(_nativeclosure(closure), nparams, stackbase, outres,suspend); } break; case OT_CLASS: { SQObjectPtr constr; SQObjectPtr temp; CreateClassInstance(_class(closure),outres,constr); if(type(constr) != OT_NULL) { _stack[stackbase] = outres; return Call(constr,nparams,stackbase,temp,raiseerror); } return true; } break; default: return false; } #ifdef _DEBUG if(!_suspended) { assert(_stackbase == prevstackbase); } #endif return true; } bool SQVM::CallMetaMethod(SQObjectPtr &closure,SQMetaMethod mm,SQInteger nparams,SQObjectPtr &outres) { //SQObjectPtr closure; _nmetamethodscall++; if(Call(closure, nparams, _top - nparams, outres, SQFalse)) { _nmetamethodscall--; Pop(nparams); return true; } _nmetamethodscall--; //} Pop(nparams); return false; } void SQVM::FindOuter(SQObjectPtr &target, SQObjectPtr *stackindex) { SQOuter **pp = &_openouters; SQOuter *p; SQOuter *otr; while ((p = *pp) != NULL && p->_valptr >= stackindex) { if (p->_valptr == stackindex) { target = SQObjectPtr(p); return; } pp = &p->_next; } otr = SQOuter::Create(_ss(this), stackindex); otr->_next = *pp; otr->_idx = (stackindex - _stack._vals); __ObjAddRef(otr); *pp = otr; target = SQObjectPtr(otr); } bool SQVM::EnterFrame(SQInteger newbase, SQInteger newtop, bool tailcall) { if( !tailcall ) { if( _callsstacksize == _alloccallsstacksize ) { GrowCallStack(); } ci = &_callsstack[_callsstacksize++]; ci->_prevstkbase = (SQInt32)(newbase - _stackbase); ci->_prevtop = (SQInt32)(_top - _stackbase); ci->_etraps = 0; ci->_ncalls = 1; ci->_generator = NULL; ci->_root = SQFalse; } else { ci->_ncalls++; } _stackbase = newbase; _top = newtop; if(newtop + MIN_STACK_OVERHEAD > (SQInteger)_stack.size()) { if(_nmetamethodscall) { Raise_Error(_SC("stack overflow, cannot resize stack while in a metamethod")); return false; } _stack.resize(_stack.size() + (MIN_STACK_OVERHEAD << 2)); RelocateOuters(); } return true; } void SQVM::LeaveFrame() { SQInteger last_top = _top; SQInteger last_stackbase = _stackbase; SQInteger css = --_callsstacksize; /* First clean out the call stack frame */ ci->_closure.Null(); _stackbase -= ci->_prevstkbase; _top = _stackbase + ci->_prevtop; ci = (css) ? &_callsstack[css-1] : NULL; if(_openouters) CloseOuters(&(_stack._vals[last_stackbase])); while (last_top >= _top) { _stack._vals[last_top--].Null(); } } void SQVM::RelocateOuters() { SQOuter *p = _openouters; while (p) { p->_valptr = _stack._vals + p->_idx; p = p->_next; } } void SQVM::CloseOuters(SQObjectPtr *stackindex) { SQOuter *p; while ((p = _openouters) != NULL && p->_valptr >= stackindex) { p->_value = *(p->_valptr); p->_valptr = &p->_value; _openouters = p->_next; __ObjRelease(p); } } void SQVM::Remove(SQInteger n) { n = (n >= 0)?n + _stackbase - 1:_top + n; for(SQInteger i = n; i < _top; i++){ _stack[i] = _stack[i+1]; } _stack[_top].Null(); _top--; } void SQVM::Pop() { _stack[--_top].Null(); } void SQVM::Pop(SQInteger n) { for(SQInteger i = 0; i < n; i++){ _stack[--_top].Null(); } } void SQVM::PushNull() { _stack[_top++].Null(); } void SQVM::Push(const SQObjectPtr &o) { _stack[_top++] = o; } SQObjectPtr &SQVM::Top() { return _stack[_top-1]; } SQObjectPtr &SQVM::PopGet() { return _stack[--_top]; } SQObjectPtr &SQVM::GetUp(SQInteger n) { return _stack[_top+n]; } SQObjectPtr &SQVM::GetAt(SQInteger n) { return _stack[n]; } #ifdef _DEBUG_DUMP void SQVM::dumpstack(SQInteger stackbase,bool dumpall) { SQInteger size=dumpall?_stack.size():_top; SQInteger n=0; scprintf(_SC("\n>>>>stack dump<<<<\n")); CallInfo &ci=_callsstack[_callsstacksize-1]; scprintf(_SC("IP: %p\n"),ci._ip); scprintf(_SC("prev stack base: %d\n"),ci._prevstkbase); scprintf(_SC("prev top: %d\n"),ci._prevtop); for(SQInteger i=0;i"));else scprintf(_SC(" ")); scprintf(_SC("[%d]:"),n); switch(type(obj)){ case OT_FLOAT: scprintf(_SC("FLOAT %.3f"),_float(obj));break; case OT_INTEGER: scprintf(_SC("INTEGER %d"),_integer(obj));break; case OT_BOOL: scprintf(_SC("BOOL %s"),_integer(obj)?"true":"false");break; case OT_STRING: scprintf(_SC("STRING %s"),_stringval(obj));break; case OT_NULL: scprintf(_SC("NULL")); break; case OT_TABLE: scprintf(_SC("TABLE %p[%p]"),_table(obj),_table(obj)->_delegate);break; case OT_ARRAY: scprintf(_SC("ARRAY %p"),_array(obj));break; case OT_CLOSURE: scprintf(_SC("CLOSURE [%p]"),_closure(obj));break; case OT_NATIVECLOSURE: scprintf(_SC("NATIVECLOSURE"));break; case OT_USERDATA: scprintf(_SC("USERDATA %p[%p]"),_userdataval(obj),_userdata(obj)->_delegate);break; case OT_GENERATOR: scprintf(_SC("GENERATOR %p"),_generator(obj));break; case OT_THREAD: scprintf(_SC("THREAD [%p]"),_thread(obj));break; case OT_USERPOINTER: scprintf(_SC("USERPOINTER %p"),_userpointer(obj));break; case OT_CLASS: scprintf(_SC("CLASS %p"),_class(obj));break; case OT_INSTANCE: scprintf(_SC("INSTANCE %p"),_instance(obj));break; case OT_WEAKREF: scprintf(_SC("WEAKERF %p"),_weakref(obj));break; default: assert(0); break; }; scprintf(_SC("\n")); ++n; } } #endif