diff options
Diffstat (limited to 'squirrel_3_0_1_stable/squirrel/sqvm.cpp')
| -rw-r--r-- | squirrel_3_0_1_stable/squirrel/sqvm.cpp | 1714 |
1 files changed, 1714 insertions, 0 deletions
diff --git a/squirrel_3_0_1_stable/squirrel/sqvm.cpp b/squirrel_3_0_1_stable/squirrel/sqvm.cpp new file mode 100644 index 000000000..bd8ebcc1a --- /dev/null +++ b/squirrel_3_0_1_stable/squirrel/sqvm.cpp @@ -0,0 +1,1714 @@ +/*
+ see copyright notice in squirrel.h
+*/
+#include "sqpcheader.h"
+#include <math.h>
+#include <stdlib.h>
+#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;
+ INIT_CHAIN();ADD_TO_CHAIN(&_ss(this)->_gc_chain,this);
+}
+
+void SQVM::Finalize()
+{
+ 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<size;i++)
+ _stack[i].Null();
+}
+
+SQVM::~SQVM()
+{
+ Finalize();
+ REMOVE_FROM_CHAIN(&_ss(this)->_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));
+ 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)) return false;
+ }
+ break;
+ }
+ //continues through (no break needed)
+ default:
+ _RET_SUCCEED( _userpointer(o1) < _userpointer(o2)?-1:1 );
+ }
+ 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)),_SC("%g"),_float(o));
+ break;
+ case OT_INTEGER:
+ scsprintf(_sp(rsl(NUMBER_MAX_CHAR+1)),_PRINT_INT_FMT,_integer(o));
+ break;
+ case OT_BOOL:
+ scsprintf(_sp(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)),_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);
+ else {
+ _roottable = friendvm->_roottable;
+ _errorhandler = friendvm->_errorhandler;
+ _debughook = friendvm->_debughook;
+ _debughook_native = friendvm->_debughook_native;
+ _debughook_closure = friendvm->_debughook_closure;
+ }
+
+ sq_base_register(this);
+ 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<ci->_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);
+ if((nouters = func->_noutervalues)) {
+ for(SQInteger i = 0; i<nouters; i++) {
+ SQOuterVar &v = func->_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);
+ Call(_class(target)->_metamethods[MT_INHERITED],nparams,_top - nparams, ret, 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;
+}
+
+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-ci->_iv->_vals,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: TARGET = _roottable; 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,DONT_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: {
+ bool bstatic = (arg0&NEW_SLOT_STATIC_FLAG)?true:false;
+ if(type(STK(arg1)) == OT_CLASS) {
+ if(type(_class(STK(arg1))->_metamethods[MT_NEWMEMBER]) != OT_NULL ) {
+ Push(STK(arg1)); Push(STK(arg2)); Push(STK(arg3));
+ Push((arg0&NEW_SLOT_ATTRIBUTES_FLAG) ? STK(arg2-1) : SQObjectPtr());
+ Push(bstatic);
+ int nparams = 5;
+ if(Call(_class(STK(arg1))->_metamethods[MT_NEWMEMBER], nparams, _top - nparams, temp_reg,SQFalse)) {
+ Pop(nparams);
+ continue;
+ }
+ else {
+ SQ_THROW();
+ }
+ }
+ }
+ _GUARD(NewSlot(STK(arg1), STK(arg2), STK(arg3),bstatic));
+ if((arg0&NEW_SLOT_ATTRIBUTES_FLAG)) {
+ _class(STK(arg1))->SetAttributes(STK(arg2),STK(arg2-1));
+ }
+ }
+ 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; } 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;
+ }
+ 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) {
+ if(_table(_roottable)->Get(key,dest)) return true;
+ }
+//#endif
+ 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 {
+ if(type(_lasterror) != OT_NULL) { //NULL means "clean failure" (not found)
+ //error
+ Pop(2);
+ 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::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<size;i++){
+ SQObjectPtr &obj=_stack[i];
+ if(stackbase==i)scprintf(_SC(">"));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
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