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bluecore/squirrel/squirrel/sqvm.cpp

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/*
see copyright notice in squirrel.h
*/
#include "sqpcheader.h"
#include <math.h>
#include <stdlib.h>
#include "sqopcodes.h"
#include "sqfuncproto.h"
#include "sqvm.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;
SQInteger i1 = _integer(o1), i2 = _integer(o2);
if((type(o1)==OT_INTEGER) && (type(o2)==OT_INTEGER))
{
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;
}
bool SQVM::ARITH_OP(SQUnsignedInteger op,SQObjectPtr &trg,const SQObjectPtr &o1,const SQObjectPtr &o2)
{
if(sq_isnumeric(o1) && sq_isnumeric(o2)) {
if((type(o1)==OT_INTEGER) && (type(o2)==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 '%': res = i1 % i2; break;
default: res = 0xDEADBEEF;
}
trg = res;
}else{
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;
}
} else {
if(op == '+' && (type(o1) == OT_STRING || type(o2) == OT_STRING)){
if(!StringCat(o1, o2, trg)) return false;
}
else if(!ArithMetaMethod(op,o1,o2,trg)) {
Raise_Error(_SC("arith op %c on between '%s' and '%s'"),op,GetTypeName(o1),GetTypeName(o2)); 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;
_lasterror = _null_;
_errorhandler = _null_;
_debughook = _null_;
ci = NULL;
INIT_CHAIN();ADD_TO_CHAIN(&_ss(this)->_gc_chain,this);
}
void SQVM::Finalize()
{
_roottable = _null_;
_lasterror = _null_;
_errorhandler = _null_;
_debughook = _null_;
temp_reg = _null_;
SQInteger size=_stack.size();
for(SQInteger i=0;i<size;i++)
_stack[i]=_null_;
}
SQVM::~SQVM()
{
Finalize();
sq_free(_callsstack,_alloccallsstacksize*sizeof(CallInfo));
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) {
Push(o1);Push(o2);
return CallMetaMethod(_delegable(o1),mm,2,dest);
}
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) {
Push(o);
if(CallMetaMethod(_delegable(o), MT_UNM, 1, temp_reg)) {
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)
{
if(type(o1)==type(o2)){
if(_userpointer(o1)==_userpointer(o2))_RET_SUCCEED(0);
SQObjectPtr res;
switch(type(o1)){
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:
Push(o1);Push(o2);
if(_delegable(o1)->_delegate)CallMetaMethod(_delegable(o1),MT_CMP,2,res);
break;
default: break; //shutup compiler
}
if(type(res)!=OT_INTEGER) { Raise_CompareError(o1,o2); return false; }
_RET_SUCCEED(_integer(res));
}
else{
if(sq_isnumeric(o1) && sq_isnumeric(o2)){
if((type(o1)==OT_INTEGER) && (type(o2)==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(type(o1)==OT_NULL) {_RET_SUCCEED(-1);}
else if(type(o2)==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)?_true_:_false_; return true;
case CMP_GE: res = (r >= 0)?_true_:_false_; return true;
case CMP_L: res = (r < 0)?_true_:_false_; return true;
case CMP_LE: res = (r <= 0)?_true_:_false_; return true;
}
assert(0);
}
return false;
}
void SQVM::ToString(const SQObjectPtr &o,SQObjectPtr &res)
{
switch(type(o)) {
case OT_STRING:
res = o;
return;
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)),_SC("%d"),_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) {
Push(o);
if(CallMetaMethod(_delegable(o),MT_TOSTRING,1,res)) {
if(type(res) == OT_STRING)
return;
//else keeps going to the default
}
}
default:
scsprintf(_sp(rsl(sizeof(void*)+20)),_SC("(%s : 0x%p)"),GetTypeName(o),(void*)_rawval(o));
}
res = SQString::Create(_ss(this),_spval);
}
bool SQVM::StringCat(const SQObjectPtr &str,const SQObjectPtr &obj,SQObjectPtr &dest)
{
SQObjectPtr a, b;
ToString(str, a);
ToString(obj, b);
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;
}
const SQChar *IdType2Name(SQObjectType type)
{
switch(_RAW_TYPE(type))
{
case _RT_NULL:return _SC("null");
case _RT_INTEGER:return _SC("integer");
case _RT_FLOAT:return _SC("float");
case _RT_BOOL:return _SC("bool");
case _RT_STRING:return _SC("string");
case _RT_TABLE:return _SC("table");
case _RT_ARRAY:return _SC("array");
case _RT_GENERATOR:return _SC("generator");
case _RT_CLOSURE:
case _RT_NATIVECLOSURE:
return _SC("function");
case _RT_USERDATA:
case _RT_USERPOINTER:
return _SC("userdata");
case _RT_THREAD: return _SC("thread");
case _RT_FUNCPROTO: return _SC("function");
case _RT_CLASS: return _SC("class");
case _RT_INSTANCE: return _SC("instance");
case _RT_WEAKREF: return _SC("weakref");
default:
return NULL;
}
}
const SQChar *GetTypeName(const SQObjectPtr &obj1)
{
return IdType2Name(type(obj1));
}
void SQVM::TypeOf(const SQObjectPtr &obj1,SQObjectPtr &dest)
{
if(is_delegable(obj1) && _delegable(obj1)->_delegate) {
Push(obj1);
if(CallMetaMethod(_delegable(obj1),MT_TYPEOF,1,dest))
return;
}
dest = SQString::Create(_ss(this),GetTypeName(obj1));
}
bool SQVM::Init(SQVM *friendvm, SQInteger stacksize)
{
_stack.resize(stacksize);
//_callsstack.reserve(4);
_alloccallsstacksize = 4;
_callsstacksize = 0;
_callsstack = (CallInfo*)sq_malloc(_alloccallsstacksize*sizeof(CallInfo));
_stackbase = 0;
_top = 0;
if(!friendvm)
_roottable = SQTable::Create(_ss(this), 0);
else {
_roottable = friendvm->_roottable;
_errorhandler = friendvm->_errorhandler;
_debughook = friendvm->_debughook;
}
sq_base_register(this);
return true;
}
extern SQInstructionDesc g_InstrDesc[];
bool SQVM::StartCall(SQClosure *closure,SQInteger target,SQInteger nargs,SQInteger stackbase,bool tailcall)
{
SQFunctionProto *func = _funcproto(closure->_function);
const SQInteger paramssize = func->_nparameters;
const SQInteger newtop = stackbase + func->_stacksize;
if (paramssize != nargs) {
if(func->_varparams)
{
if (nargs < paramssize) {
Raise_Error(_SC("wrong number of parameters"));
return false;
}
for(SQInteger n = 0; n < nargs - paramssize; n++) {
_vargsstack.push_back(_stack._vals[stackbase+paramssize+n]);
_stack._vals[stackbase+paramssize+n] = _null_;
}
}
else {
Raise_Error(_SC("wrong number of parameters"));
return false;
}
}
if(type(closure->_env) == OT_WEAKREF) {
_stack._vals[stackbase] = _weakref(closure->_env)->_obj;
}
if (!tailcall) {
CallInfo lc;
lc._etraps = 0;
lc._prevstkbase = (SQInt32) ( stackbase - _stackbase );
lc._target = (SQInt32) target;
lc._prevtop = (SQInt32) (_top - _stackbase);
lc._ncalls = 1;
lc._root = SQFalse;
PUSH_CALLINFO(this, lc);
}
else {
ci->_ncalls++;
}
ci->_vargs.size = (SQInt32)(nargs - paramssize);
ci->_vargs.base = (SQInt32) (_vargsstack.size()-(ci->_vargs.size));
ci->_closure._unVal.pClosure = closure;
ci->_closure._type = OT_CLOSURE;
ci->_literals = func->_literals;
ci->_ip = func->_instructions;
//grows the stack if needed
if (((SQUnsignedInteger)newtop + (func->_stacksize<<1)) > _stack.size()) {
_stack.resize(_stack.size() + (func->_stacksize<<1));
}
_top = newtop;
_stackbase = stackbase;
return true;
}
bool SQVM::Return(SQInteger _arg0, SQInteger _arg1, SQObjectPtr &retval)
{
if (type(_debughook) != OT_NULL && _rawval(_debughook) != _rawval(ci->_closure))
for(SQInteger i=0;i<ci->_ncalls;i++)
CallDebugHook(_SC('r'));
SQBool broot = ci->_root;
SQInteger last_top = _top;
SQInteger target = ci->_target;
SQInteger oldstackbase = _stackbase;
_stackbase -= ci->_prevstkbase;
_top = _stackbase + ci->_prevtop;
if(ci->_vargs.size) PopVarArgs(ci->_vargs);
POP_CALLINFO(this);
if (broot) {
if (_arg0 != MAX_FUNC_STACKSIZE) retval = _stack._vals[oldstackbase+_arg1];
else retval = _null_;
}
else {
if(target != -1) { //-1 is when a class contructor ret value has to be ignored
if (_arg0 != MAX_FUNC_STACKSIZE)
STK(target) = _stack._vals[oldstackbase+_arg1];
else
STK(target) = _null_;
}
}
while (last_top >= _top) _stack._vals[last_top--].Null();
assert(oldstackbase >= _stackbase);
return broot?true:false;
}
#define _RET_ON_FAIL(exp) { if(!exp) return false; }
bool SQVM::LOCAL_INC(SQInteger op,SQObjectPtr &target, SQObjectPtr &a, SQObjectPtr &incr)
{
_RET_ON_FAIL(ARITH_OP( op , target, a, incr));
a = target;
return true;
}
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)
{
SQObjectPtr tmp, tself = self, tkey = key;
if (!Get(tself, tkey, tmp, false, true)) { Raise_IdxError(tkey); return false; }
_RET_ON_FAIL(ARITH_OP( op , target, tmp, incr))
Set(tself, tkey, target,true);
if (postfix) target = tmp;
return true;
}
#define arg0 (_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;
}
void SQVM::PopVarArgs(VarArgs &vargs)
{
for(SQInteger n = 0; n< vargs.size; n++)
_vargsstack.pop_back();
}
#define _FINISH(stoploop) {finished = stoploop; return true; }
bool SQVM::FOREACH_OP(SQObjectPtr &o1,SQObjectPtr &o2,SQObjectPtr
&o3,SQObjectPtr &o4,SQInteger arg_2,bool &finished)
{
SQInteger nrefidx;
switch(type(o1)) {
case OT_TABLE:
if((nrefidx = _table(o1)->Next(false,o4, o2, o3)) == -1) _FINISH(true);
o4 = (SQInteger)nrefidx; _FINISH(false);
case OT_ARRAY:
if((nrefidx = _array(o1)->Next(o4, o2, o3)) == -1) _FINISH(true);
o4 = (SQInteger) nrefidx; _FINISH(false);
case OT_STRING:
if((nrefidx = _string(o1)->Next(o4, o2, o3)) == -1)_FINISH(true);
o4 = (SQInteger)nrefidx; _FINISH(false);
case OT_CLASS:
if((nrefidx = _class(o1)->Next(o4, o2, o3)) == -1)_FINISH(true);
o4 = (SQInteger)nrefidx; _FINISH(false);
case OT_USERDATA:
case OT_INSTANCE:
if(_delegable(o1)->_delegate) {
SQObjectPtr itr;
Push(o1);
Push(o4);
if(CallMetaMethod(_delegable(o1), MT_NEXTI, 2, itr)){
o4 = o2 = itr;
if(type(itr) == OT_NULL) _FINISH(true);
if(!Get(o1, itr, o3, false,false)) {
Raise_Error(_SC("_nexti returned an invalid idx"));
return false;
}
_FINISH(false);
}
Raise_Error(_SC("_nexti failed"));
return false;
}
break;
case OT_GENERATOR:
if(_generator(o1)->_state == SQGenerator::eDead) _FINISH(true);
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, arg_2+1);
_FINISH(false);
}
default:
Raise_Error(_SC("cannot iterate %s"), GetTypeName(o1));
}
return false; //cannot be hit(just to avoid warnings)
}
bool SQVM::DELEGATE_OP(SQObjectPtr &trg,SQObjectPtr &o1,SQObjectPtr &o2)
{
if(type(o1) != OT_TABLE) { Raise_Error(_SC("delegating a '%s'"), GetTypeName(o1)); return false; }
switch(type(o2)) {
case OT_TABLE:
if(!_table(o1)->SetDelegate(_table(o2))){
Raise_Error(_SC("delegate cycle detected"));
return false;
}
break;
case OT_NULL:
_table(o1)->SetDelegate(NULL);
break;
default:
Raise_Error(_SC("using '%s' as delegate"), GetTypeName(o2));
return false;
break;
}
trg = o1;
return true;
}
#define COND_LITERAL (arg3!=0?ci->_literals[arg1]:STK(arg1))
#define _GUARD(exp) { if(!exp) { Raise_Error(_lasterror); SQ_THROW();} }
#define SQ_THROW() { goto exception_trap; }
bool SQVM::CLOSURE_OP(SQObjectPtr &target, SQFunctionProto *func)
{
SQInteger nouters;
SQClosure *closure = SQClosure::Create(_ss(this), func);
if((nouters = func->_noutervalues)) {
closure->_outervalues.reserve(nouters);
for(SQInteger i = 0; i<nouters; i++) {
SQOuterVar &v = func->_outervalues[i];
switch(v._type){
case otSYMBOL:
closure->_outervalues.push_back(_null_);
if(!Get(_stack._vals[_stackbase]/*STK(0)*/, v._src, closure->_outervalues.top(), false,true))
{Raise_IdxError(v._src); return false; }
break;
case otLOCAL:
closure->_outervalues.push_back(_stack._vals[_stackbase+_integer(v._src)]);
break;
case otOUTER:
closure->_outervalues.push_back(_closure(ci->_closure)->_outervalues[_integer(v._src)]);
break;
}
}
}
target = closure;
return true;
}
bool SQVM::GETVARGV_OP(SQObjectPtr &target,SQObjectPtr &index,CallInfo *ci)
{
if(ci->_vargs.size == 0) {
Raise_Error(_SC("the function doesn't have var args"));
return false;
}
if(!sq_isnumeric(index)){
Raise_Error(_SC("indexing 'vargv' with %s"),GetTypeName(index));
return false;
}
SQInteger idx = tointeger(index);
if(idx < 0 || idx >= ci->_vargs.size){ Raise_Error(_SC("vargv index out of range")); return false; }
target = _vargsstack[ci->_vargs.base+idx];
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(SQObjectPtr &o1,SQObjectPtr &o2,bool &res)
{
if(type(o1) == type(o2)) {
res = ((_userpointer(o1) == _userpointer(o2)?true:false));
}
else {
if(sq_isnumeric(o1) && sq_isnumeric(o2)) {
SQInteger cmpres;
if(!ObjCmp(o1, o2,cmpres)) return false;
res = (cmpres == 0);
}
else {
res = false;
}
}
return true;
}
bool SQVM::IsFalse(SQObjectPtr &o)
{
if((type(o) & SQOBJECT_CANBEFALSE) && ( (type(o) == OT_FLOAT) && (_float(o) == SQFloat(0.0)) )
|| (_integer(o) == 0) ) { //OT_NULL|OT_INTEGER|OT_BOOL
return true;
}
return false;
}
bool SQVM::GETPARENT_OP(SQObjectPtr &o,SQObjectPtr &target)
{
switch(type(o)) {
case OT_TABLE: target = _table(o)->_delegate?SQObjectPtr(_table(o)->_delegate):_null_;
break;
case OT_CLASS: target = _class(o)->_base?_class(o)->_base:_null_;
break;
default:
Raise_Error(_SC("the %s type doesn't have a parent slot"), GetTypeName(o));
return false;
}
return true;
}
bool SQVM::Execute(SQObjectPtr &closure, SQInteger target, 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;
//temp_reg vars for OP_CALL
SQInteger ct_target;
SQInteger ct_stackbase;
bool ct_tailcall;
switch(et) {
case ET_CALL:
if(!StartCall(_closure(closure), _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;
}
ci->_root = SQTrue;
break;
case ET_RESUME_GENERATOR: _generator(closure)->Resume(this, target); ci->_root = SQTrue; traps += ci->_etraps; break;
case ET_RESUME_VM:
traps = _suspended_traps;
ci->_root = _suspended_root;
ci->_vargs = _suspend_varargs;
_suspended = SQFalse;
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(type(_debughook) != OT_NULL && _rawval(_debughook) != _rawval(ci->_closure))
CallDebugHook(_SC('l'),arg1);
continue;
case _OP_LOAD: TARGET = ci->_literals[arg1]; continue;
case _OP_LOADINT: TARGET = (SQInteger)arg1; continue;
case _OP_LOADFLOAT: TARGET = *((SQFloat *)&arg1); continue;
case _OP_DLOAD: TARGET = ci->_literals[arg1]; STK(arg2) = ci->_literals[arg3];continue;
case _OP_TAILCALL:
temp_reg = STK(arg1);
if (type(temp_reg) == OT_CLOSURE){
ct_tailcall = true;
if(ci->_vargs.size) PopVarArgs(ci->_vargs);
for (SQInteger i = 0; i < arg3; i++) STK(i) = STK(arg2 + i);
ct_target = ci->_target;
ct_stackbase = _stackbase;
goto common_call;
}
case _OP_CALL: {
ct_tailcall = false;
ct_target = arg0;
temp_reg = STK(arg1);
ct_stackbase = _stackbase+arg2;
common_call:
SQInteger last_top = _top;
switch (type(temp_reg)) {
case OT_CLOSURE:{
_GUARD(StartCall(_closure(temp_reg), ct_target, arg3, ct_stackbase, ct_tailcall));
if (_funcproto(_closure(temp_reg)->_function)->_bgenerator) {
SQGenerator *gen = SQGenerator::Create(_ss(this), _closure(temp_reg));
_GUARD(gen->Yield(this));
Return(1, ct_target, temp_reg);
STK(ct_target) = gen;
while (last_top >= _top) _stack._vals[last_top--].Null();
continue;
}
if (type(_debughook) != OT_NULL && _rawval(_debughook) != _rawval(ci->_closure))
CallDebugHook(_SC('c'));
}
continue;
case OT_NATIVECLOSURE: {
bool suspend;
_GUARD(CallNative(_nativeclosure(temp_reg), arg3, ct_stackbase, ct_tailcall, temp_reg,suspend));
if(suspend){
_suspended = SQTrue;
_suspended_target = ct_target;
_suspended_root = ci->_root;
_suspended_traps = traps;
_suspend_varargs = ci->_vargs;
outres = temp_reg;
return true;
}
if(ct_target != -1) { //skip return value for constructors
STK(ct_target) = temp_reg;
}
}
continue;
case OT_CLASS:{
SQObjectPtr inst;
_GUARD(CreateClassInstance(_class(temp_reg),inst,temp_reg));
STK(ct_target) = inst;
ct_target = -1; //fakes return value target so that is not overwritten by the constructor
if(type(temp_reg) != OT_NULL) {
_stack._vals[ct_stackbase] = inst;
goto common_call; //hard core spaghetti code(reissues the OP_CALL to invoke the constructor)
}
}
break;
case OT_TABLE:
case OT_USERDATA:
case OT_INSTANCE:
{
Push(temp_reg);
for (SQInteger i = 0; i < arg3; i++) Push(STK(arg2 + i));
if (_delegable(temp_reg) && CallMetaMethod(_delegable(temp_reg), MT_CALL, arg3+1, temp_reg)){
STK(ct_target) = temp_reg;
break;
}
Raise_Error(_SC("attempt to call '%s'"), GetTypeName(temp_reg));
SQ_THROW();
}
default:
Raise_Error(_SC("attempt to call '%s'"), GetTypeName(temp_reg));
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,true)) {
if(type(o) == OT_CLASS) { //hack?
if(_class_ddel->Get(key,temp_reg)) {
STK(arg3) = o;
TARGET = temp_reg;
continue;
}
}
{ Raise_IdxError(key); SQ_THROW();}
}
STK(arg3) = type(o) == OT_CLASS?STK(0):o;
TARGET = temp_reg;
}
continue;
case _OP_GETK:
if (!Get(STK(arg2), ci->_literals[arg1], temp_reg, false,true)) { Raise_IdxError(ci->_literals[arg1]); SQ_THROW();}
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 != arg3) 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),true)) { Raise_IdxError(STK(arg2)); SQ_THROW(); }
if (arg0 != arg3) TARGET = STK(arg3);
continue;
case _OP_GET:
if (!Get(STK(arg1), STK(arg2), temp_reg, false,true)) { Raise_IdxError(STK(arg2)); SQ_THROW(); }
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_ARITH: _GUARD(ARITH_OP( arg3 , temp_reg, STK(arg2), STK(arg1))); TARGET = temp_reg; continue;
case _OP_BITW: _GUARD(BW_OP( arg3,TARGET,STK(arg2),STK(arg1))); continue;
case _OP_RETURN:
if(type((ci)->_generator) == OT_GENERATOR) {
_generator((ci)->_generator)->Kill();
}
if(Return(arg0, arg1, temp_reg)){
assert(traps==0);
outres = temp_reg;
return true;
}
continue;
case _OP_LOADNULLS:{ for(SQInt32 n=0; n < arg1; n++) STK(arg0+n) = _null_; }continue;
case _OP_LOADROOTTABLE: 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_JZ: if(IsFalse(STK(arg0))) ci->_ip+=(sarg1); continue;
case _OP_LOADFREEVAR: TARGET = _closure(ci->_closure)->_outervalues[arg1]; continue;
case _OP_VARGC: TARGET = SQInteger(ci->_vargs.size); continue;
case _OP_GETVARGV:
if(!GETVARGV_OP(TARGET,STK(arg1),ci)) { SQ_THROW(); }
continue;
case _OP_NEWTABLE: TARGET = SQTable::Create(_ss(this), arg1); continue;
case _OP_NEWARRAY: TARGET = SQArray::Create(_ss(this), 0); _array(TARGET)->Reserve(arg1); continue;
case _OP_APPENDARRAY: _array(STK(arg0))->Append(COND_LITERAL); continue;
case _OP_GETPARENT: _GUARD(GETPARENT_OP(STK(arg1),TARGET)); continue;
case _OP_COMPARITH: _GUARD(DerefInc(arg3, TARGET, STK((((SQUnsignedInteger)arg1&0xFFFF0000)>>16)), STK(arg2), STK(arg1&0x0000FFFF), false)); continue;
case _OP_COMPARITHL: _GUARD(LOCAL_INC(arg3, TARGET, STK(arg1), STK(arg2))); continue;
case _OP_INC: {SQObjectPtr o(sarg3); _GUARD(DerefInc('+',TARGET, STK(arg1), STK(arg2), o, false));} continue;
case _OP_INCL: {SQObjectPtr o(sarg3); _GUARD(LOCAL_INC('+',TARGET, STK(arg1), o));} continue;
case _OP_PINC: {SQObjectPtr o(sarg3); _GUARD(DerefInc('+',TARGET, STK(arg1), STK(arg2), o, true));} continue;
case _OP_PINCL: {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,false)?_true_:_false_;continue;
case _OP_INSTANCEOF:
if(type(STK(arg1)) != OT_CLASS || type(STK(arg2)) != OT_INSTANCE)
{Raise_Error(_SC("cannot apply instanceof between a %s and a %s"),GetTypeName(STK(arg1)),GetTypeName(STK(arg2))); SQ_THROW();}
TARGET = _instance(STK(arg2))->InstanceOf(_class(STK(arg1)))?_true_:_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))?_true_:_false_); 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._unVal.pFunctionProto;
if(!CLOSURE_OP(TARGET,fp->_functions[arg1]._unVal.pFunctionProto)) { SQ_THROW(); }
continue;
}
case _OP_YIELD:{
if(type(ci->_generator) == OT_GENERATOR) {
if(sarg1 != MAX_FUNC_STACKSIZE) temp_reg = STK(arg1);
_GUARD(_generator(ci->_generator)->Yield(this));
traps -= ci->_etraps;
if(sarg1 != MAX_FUNC_STACKSIZE) 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, arg0));
traps += ci->_etraps;
continue;
case _OP_FOREACH:{ bool finished;
_GUARD(FOREACH_OP(STK(arg0),STK(arg2),STK(arg2+1),STK(arg2+2),arg2,finished));
if(finished) ci->_ip += sarg1; }
continue;
case _OP_DELEGATE: _GUARD(DELEGATE_OP(TARGET,STK(arg1),STK(arg2))); continue;
case _OP_CLONE:
if(!Clone(STK(arg1), TARGET))
{ Raise_Error(_SC("cloning a %s"), GetTypeName(STK(arg1))); SQ_THROW();}
continue;
case _OP_TYPEOF: TypeOf(STK(arg1), TARGET); continue;
case _OP_PUSHTRAP:{
SQInstruction *_iv = _funcproto(_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_CLASS: _GUARD(CLASS_OP(TARGET,arg1,arg2)); 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) : _null_);
int nparams = 4;
if(Call(_class(STK(arg1))->_metamethods[MT_NEWMEMBER], nparams, _top - nparams, temp_reg,SQFalse)) {
Pop(nparams);
continue;
}
}
}
_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;
}
}
}
exception_trap:
{
SQObjectPtr currerror = _lasterror;
// dumpstack(_stackbase);
SQInteger n = 0;
SQInteger last_top = _top;
if(ci) {
if(_ss(this)->_notifyallexceptions) CallErrorHandler(currerror);
if(traps) {
do {
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;
}
//if is a native closure
if(type(ci->_closure) != OT_CLOSURE && n)
break;
if(type(ci->_generator) == OT_GENERATOR) _generator(ci->_generator)->Kill();
PopVarArgs(ci->_vargs);
POP_CALLINFO(this);
n++;
} while(_callsstacksize);
}
else {
//call the hook
if(raiseerror && !_ss(this)->_notifyallexceptions)
CallErrorHandler(currerror);
}
//remove call stack until a C function is found or the cstack is empty
if(ci) do {
SQBool exitafterthisone = ci->_root;
if(type(ci->_generator) == OT_GENERATOR) _generator(ci->_generator)->Kill();
_stackbase -= ci->_prevstkbase;
_top = _stackbase + ci->_prevtop;
PopVarArgs(ci->_vargs);
POP_CALLINFO(this);
if( (ci && type(ci->_closure) != OT_CLOSURE) || exitafterthisone) break;
} while(_callsstacksize);
while(last_top >= _top) _stack._vals[last_top--].Null();
}
_lasterror = currerror;
return false;
}
assert(0);
}
bool SQVM::CreateClassInstance(SQClass *theclass, SQObjectPtr &inst, SQObjectPtr &constructor)
{
inst = theclass->CreateInstance();
if(!theclass->Get(_ss(this)->_constructoridx,constructor)) {
//if(!Call(constr,nargs,stackbase,constr,false))
// return false;
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)
{
SQObjectPtr temp_reg;
SQInteger nparams=5;
SQFunctionProto *func=_funcproto(_closure(ci->_closure)->_function);
Push(_roottable); Push(type); Push(func->_sourcename); Push(forcedline?forcedline:func->GetLine(ci->_ip)); Push(func->_name);
Call(_debughook,nparams,_top-nparams,temp_reg,SQFalse);
Pop(nparams);
}
bool SQVM::CallNative(SQNativeClosure *nclosure,SQInteger nargs,SQInteger stackbase,bool tailcall,SQObjectPtr &retval,bool &suspend)
{
if (_nnativecalls + 1 > MAX_NATIVE_CALLS) { Raise_Error(_SC("Native stack overflow")); return false; }
SQInteger nparamscheck = nclosure->_nparamscheck;
if(((nparamscheck > 0) && (nparamscheck != nargs))
|| ((nparamscheck < 0) && (nargs < (-nparamscheck)))) {
Raise_Error(_SC("wrong number of parameters"));
return false;
}
SQInteger tcs;
if((tcs = nclosure->_typecheck.size())) {
for(SQInteger i = 0; i < nargs && i < tcs; i++)
if((nclosure->_typecheck._vals[i] != -1) && !(type(_stack._vals[stackbase+i]) & nclosure->_typecheck[i])) {
Raise_ParamTypeError(i,nclosure->_typecheck._vals[i],type(_stack._vals[stackbase+i]));
return false;
}
}
_nnativecalls++;
if ((_top + MIN_STACK_OVERHEAD) > (SQInteger)_stack.size()) {
_stack.resize(_stack.size() + (MIN_STACK_OVERHEAD<<1));
}
SQInteger oldtop = _top;
SQInteger oldstackbase = _stackbase;
_top = stackbase + nargs;
CallInfo lci;
lci._etraps = 0;
lci._closure._unVal.pNativeClosure = nclosure;
lci._closure._type = OT_NATIVECLOSURE;
lci._prevstkbase = (SQInt32) (stackbase - _stackbase);
lci._ncalls = 1;
lci._prevtop = (SQInt32) (oldtop - oldstackbase);
PUSH_CALLINFO(this, lci);
_stackbase = stackbase;
//push free variables
SQInteger outers = nclosure->_outervalues.size();
for (SQInteger i = 0; i < outers; i++) {
Push(nclosure->_outervalues[i]);
}
if(type(nclosure->_env) == OT_WEAKREF) {
_stack[stackbase] = _weakref(nclosure->_env)->_obj;
}
SQInteger ret = (nclosure->_function)(this);
_nnativecalls--;
suspend = false;
if( ret == SQ_SUSPEND_FLAG) suspend = true;
else if (ret < 0) {
_stackbase = oldstackbase;
_top = oldtop;
POP_CALLINFO(this);
Raise_Error(_lasterror);
return false;
}
if (ret != 0){ retval = TOP(); }
else { retval = _null_; }
_stackbase = oldstackbase;
_top = oldtop;
POP_CALLINFO(this);
return true;
}
bool SQVM::Get(const SQObjectPtr &self,const SQObjectPtr &key,SQObjectPtr &dest,bool raw, bool fetchroot)
{
switch(type(self)){
case OT_TABLE:
if(_table(self)->Get(key,dest))return true;
break;
case OT_ARRAY:
if(sq_isnumeric(key)){
return _array(self)->Get(tointeger(key),dest);
}
break;
case OT_INSTANCE:
if(_instance(self)->Get(key,dest)) return true;
break;
default:break; //shut up compiler
}
if(FallBackGet(self,key,dest,raw)) return true;
if(fetchroot) {
if(_rawval(STK(0)) == _rawval(self) &&
type(STK(0)) == type(self)) {
return _table(_roottable)->Get(key,dest);
}
}
return false;
}
bool SQVM::FallBackGet(const SQObjectPtr &self,const SQObjectPtr &key,SQObjectPtr &dest,bool raw)
{
switch(type(self)){
case OT_CLASS:
return _class(self)->Get(key,dest);
break;
case OT_TABLE:
case OT_USERDATA:
//delegation
if(_delegable(self)->_delegate) {
if(Get(SQObjectPtr(_delegable(self)->_delegate),key,dest,raw,false))
return true;
if(raw)return false;
Push(self);Push(key);
if(CallMetaMethod(_delegable(self),MT_GET,2,dest))
return true;
}
if(type(self) == OT_TABLE) {
if(raw) return false;
return _table_ddel->Get(key,dest);
}
return false;
break;
case OT_ARRAY:
if(raw)return false;
return _array_ddel->Get(key,dest);
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;
}
return false;
}
else {
if(raw)return false;
return _string_ddel->Get(key,dest);
}
break;
case OT_INSTANCE:
if(raw)return false;
Push(self);Push(key);
if(!CallMetaMethod(_delegable(self),MT_GET,2,dest)) {
return _instance_ddel->Get(key,dest);
}
return true;
case OT_INTEGER:case OT_FLOAT:case OT_BOOL:
if(raw)return false;
return _number_ddel->Get(key,dest);
case OT_GENERATOR:
if(raw)return false;
return _generator_ddel->Get(key,dest);
case OT_CLOSURE: case OT_NATIVECLOSURE:
if(raw)return false;
return _closure_ddel->Get(key,dest);
case OT_THREAD:
if(raw)return false;
return _thread_ddel->Get(key,dest);
case OT_WEAKREF:
if(raw)return false;
return _weakref_ddel->Get(key,dest);
default:return false;
}
return false;
}
bool SQVM::Set(const SQObjectPtr &self,const SQObjectPtr &key,const SQObjectPtr &val,bool fetchroot)
{
switch(type(self)){
case OT_TABLE:
if(_table(self)->Set(key,val))
return true;
if(_table(self)->_delegate) {
if(Set(_table(self)->_delegate,key,val,false)) {
return true;
}
}
//keeps going
case OT_USERDATA:
if(_delegable(self)->_delegate) {
SQObjectPtr t;
Push(self);Push(key);Push(val);
if(CallMetaMethod(_delegable(self),MT_SET,3,t)) return true;
}
break;
case OT_INSTANCE:{
if(_instance(self)->Set(key,val))
return true;
SQObjectPtr t;
Push(self);Push(key);Push(val);
if(CallMetaMethod(_delegable(self),MT_SET,3,t)) return true;
}
break;
case OT_ARRAY:
if(!sq_isnumeric(key)) {Raise_Error(_SC("indexing %s with %s"),GetTypeName(self),GetTypeName(key)); return false; }
return _array(self)->Set(tointeger(key),val);
default:
Raise_Error(_SC("trying to set '%s'"),GetTypeName(self));
return false;
}
if(fetchroot) {
if(_rawval(STK(0)) == _rawval(self) &&
type(STK(0)) == type(self)) {
return _table(_roottable)->Set(key,val);
}
}
return false;
}
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:
if(_delegable(newobj)->_delegate){
Push(newobj);
Push(self);
CallMetaMethod(_delegable(newobj),MT_CLONED,2,temp_reg);
}
target = newobj;
return true;
case OT_ARRAY:
target = _array(self)->Clone();
return true;
default: 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)) {
Push(self);Push(key);Push(val);
rawcall = !CallMetaMethod(_table(self),MT_NEWSLOT,3,res);
}
}
if(rawcall) _table(self)->NewSlot(key,val); //cannot fail
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;
if(_delegable(self)->_delegate) {
Push(self);Push(key);
handled = CallMetaMethod(_delegable(self),MT_DELSLOT,2,t);
}
if(!handled) {
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, _top - nparams, nparams, stackbase,outres,raiseerror);
break;
case OT_NATIVECLOSURE:{
bool suspend;
return CallNative(_nativeclosure(closure), nparams, stackbase, false, 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(SQDelegable *del,SQMetaMethod mm,SQInteger nparams,SQObjectPtr &outres)
{
SQObjectPtr closure;
if(del->GetMetaMethod(this, mm, closure)) {
if(Call(closure, nparams, _top - nparams, outres, SQFalse)) {
Pop(nparams);
return true;
}
}
Pop(nparams);
return false;
}
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::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"));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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