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SqMod/external/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 "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])
#define TARGET _stack._vals[_stackbase+arg0]
#define STK(a) _stack._vals[_stackbase+(a)]
bool SQVM::BW_OP(SQUnsignedInteger op,SQObjectPtr &trg,const SQObjectPtr &o1,const SQObjectPtr &o2)
{
SQInteger res;
if((sq_type(o1)| sq_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 = sq_type(o1)|sq_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 = sq_type(o1)|sq_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 = sq_type(o1)| sq_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; }
else if (i2 == -1 && i1 == INT_MIN) { Raise_Error(_SC("integer overflow")); return false; }
res = i1 / i2;
break;
case '*': res = i1 * i2; break;
case '%': if (i2 == 0) { Raise_Error(_SC("modulo by zero")); return false; }
else if (i2 == -1 && i1 == INT_MIN) { res = 0; break; }
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<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(sq_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 = sq_type(o1), t2 = sq_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(sq_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(sq_type(o)) {
case OT_STRING:
res = o;
return true;
case OT_FLOAT:
scsprintf(_sp(sq_rsl(NUMBER_MAX_CHAR+1)),sq_rsl(NUMBER_MAX_CHAR),_SC("%g"),_float(o));
break;
case OT_INTEGER:
scsprintf(_sp(sq_rsl(NUMBER_MAX_CHAR+1)),sq_rsl(NUMBER_MAX_CHAR),_PRINT_INT_FMT,_integer(o));
break;
case OT_BOOL:
scsprintf(_sp(sq_rsl(6)),sq_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(sq_type(res) == OT_STRING)
return true;
}
else {
return false;
}
}
}
default:
scsprintf(_sp(sq_rsl((sizeof(void*)*2)+NUMBER_MAX_CHAR)),sq_rsl((sizeof(void*)*2)+NUMBER_MAX_CHAR),_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(sq_rsl(l + ol + 1));
memcpy(s, _stringval(a), sq_rsl(l));
memcpy(s + l, _stringval(b), sq_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 (%d passed, at least %d required)"),
(int)nargs, (int)paramssize);
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 (%d passed, %d required)"),
(int)nargs, (int)paramssize);
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, 0, 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)*((const signed char *)&_i_._arg0))
#define arg1 (_i_._arg1)
#define sarg1 (*((const SQInt32 *)&_i_._arg1))
#define arg2 (_i_._arg2)
#define arg3 (_i_._arg3)
#define sarg3 ((SQInteger)*((const 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 SQ_UNUSED_ARG(arg_2),int exitpos,int &jump)
{
SQInteger nrefidx;
switch(sq_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(sq_type(itr) == OT_NULL) _FINISH(exitpos);
if(!Get(o1, itr, o3, 0, 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(sq_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<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(sq_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(sq_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)
{
SQObjectType t1 = sq_type(o1), t2 = sq_type(o2);
if(t1 == t2) {
if (t1 == OT_FLOAT) {
res = (_float(o1) == _float(o2));
}
else {
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(((sq_type(o) & SQOBJECT_CANBEFALSE)
&& ( ((sq_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)((SQInt32)arg1); continue;
#endif
case _OP_LOADFLOAT: TARGET = *((const SQFloat *)&arg1); continue;
case _OP_DLOAD: TARGET = ci->_literals[arg1]; STK(arg2) = ci->_literals[arg3];continue;
case _OP_TAILCALL:{
SQObjectPtr &t = STK(arg1);
if (sq_type(t) == OT_CLOSURE
&& (!_closure(t)->_function->_bgenerator)){
SQObjectPtr clo = t;
SQInteger last_top = _top;
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));
if (last_top >= _top) {
_top = last_top;
}
continue;
}
}
case _OP_CALL: {
SQObjectPtr clo = STK(arg1);
switch (sq_type(clo)) {
case OT_CLOSURE:
_GUARD(StartCall(_closure(clo), sarg0, arg3, _stackbase+arg2, false));
continue;
case OT_NATIVECLOSURE: {
bool suspend;
bool tailcall;
_GUARD(CallNative(_nativeclosure(clo), arg3, _stackbase+arg2, clo, (SQInt32)sarg0, suspend, tailcall));
if(suspend){
_suspended = SQTrue;
_suspended_target = sarg0;
_suspended_root = ci->_root;
_suspended_traps = traps;
outres = clo;
return true;
}
if(sarg0 != -1 && !tailcall) {
STK(arg0) = clo;
}
}
continue;
case OT_CLASS:{
SQObjectPtr inst;
_GUARD(CreateClassInstance(_class(clo),inst,clo));
if(sarg0 != -1) {
STK(arg0) = inst;
}
SQInteger stkbase;
switch(sq_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 dummy;
stkbase = _stackbase+arg2;
_stack._vals[stkbase] = inst;
_GUARD(CallNative(_nativeclosure(clo), arg3, stkbase, clo, -1, dummy, dummy));
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,0,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, 0,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, 0,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(sq_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)((SQInt32)arg1);
#endif
break;
case AAT_FLOAT:
val._type = OT_FLOAT;
val._unVal.fFloat = *((const SQFloat *)&arg1);
break;
case AAT_BOOL:
val._type = OT_BOOL;
val._unVal.nInteger = arg1;
break;
default: val._type = OT_INTEGER; 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(sq_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(sq_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, GET_FLAG_DO_NOT_RAISE_ERROR | GET_FLAG_RAW, DONT_FALL_BACK) ? true : false; continue;
case _OP_INSTANCEOF:
if(sq_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 = (sq_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(sq_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);
if (_openouters) CloseOuters(&_stack._vals[_stackbase]);
_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(sq_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(sq_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(sq_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 = sq_type(func->_sourcename) == OT_STRING?_stringval(func->_sourcename):NULL;
const SQChar *fname = sq_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, SQInt32 target,bool &suspend, bool &tailcall)
{
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) && !(sq_type(_stack._vals[newbase+i]) & tc._vals[i])) {
Raise_ParamTypeError(i,tc._vals[i], sq_type(_stack._vals[newbase+i]));
return false;
}
}
}
if(!EnterFrame(newbase, newtop, false)) return false;
ci->_closure = nclosure;
ci->_target = target;
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;
tailcall = false;
if (ret == SQ_TAILCALL_FLAG) {
tailcall = true;
return true;
}
else 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;
}
bool SQVM::TailCall(SQClosure *closure, SQInteger parambase,SQInteger nparams)
{
SQInteger last_top = _top;
SQObjectPtr clo = closure;
if (ci->_root)
{
Raise_Error("root calls cannot invoke tailcalls");
return false;
}
for (SQInteger i = 0; i < nparams; i++) STK(i) = STK(parambase + i);
bool ret = StartCall(closure, ci->_target, nparams, _stackbase, true);
if (last_top >= _top) {
_top = last_top;
}
return ret;
}
#define FALLBACK_OK 0
#define FALLBACK_NO_MATCH 1
#define FALLBACK_ERROR 2
bool SQVM::Get(const SQObjectPtr &self, const SQObjectPtr &key, SQObjectPtr &dest, SQUnsignedInteger getflags, SQInteger selfidx)
{
switch(sq_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 ((getflags & GET_FLAG_DO_NOT_RAISE_ERROR) == 0) 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);
SQInteger len = _string(self)->_len;
if (n < 0) { n += len; }
if (n >= 0 && n < len) {
dest = SQInteger(_stringval(self)[n]);
return true;
}
if ((getflags & GET_FLAG_DO_NOT_RAISE_ERROR) == 0) Raise_IdxError(key);
return false;
}
break;
default:break; //shut up compiler
}
if ((getflags & GET_FLAG_RAW) == 0) {
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(sq_type(w->_obj) != OT_NULL)
{
if(Get(*((const SQObjectPtr *)&w->_obj),key,dest,0,DONT_FALL_BACK)) return true;
}
}
//#endif
if ((getflags & GET_FLAG_DO_NOT_RAISE_ERROR) == 0) Raise_IdxError(key);
return false;
}
bool SQVM::InvokeDefaultDelegate(const SQObjectPtr &self,const SQObjectPtr &key,SQObjectPtr &dest)
{
SQTable *ddel = NULL;
switch(sq_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(sq_type(self)){
case OT_TABLE:
case OT_USERDATA:
//delegation
if(_delegable(self)->_delegate) {
if(Get(SQObjectPtr(_delegable(self)->_delegate),key,dest,0,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(sq_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(sq_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;
case OT_USERDATA: break; // must fall back
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(sq_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 {
Pop(3);
if(sq_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::Clone(const SQObjectPtr &self,SQObjectPtr &target)
{
SQObjectPtr temp_reg;
SQObjectPtr newobj;
switch(sq_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(sq_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(sq_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(sq_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(sq_type(key) == OT_NULL) { Raise_Error(_SC("null cannot be used as index")); return false; }
switch(sq_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(sq_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(sq_type(self) == OT_TABLE) {
if(_table(self)->Get(key,t)) {
_table(self)->Remove(key);
}
else {
Raise_IdxError((const 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(sq_type(closure)) {
case OT_CLOSURE:
return Execute(closure, nparams, stackbase, outres, raiseerror);
break;
case OT_NATIVECLOSURE:{
bool dummy;
return CallNative(_nativeclosure(closure), nparams, stackbase, outres, -1, dummy, dummy);
}
break;
case OT_CLASS: {
SQObjectPtr constr;
SQObjectPtr temp;
CreateClassInstance(_class(closure),outres,constr);
SQObjectType ctype = sq_type(constr);
if (ctype == OT_NATIVECLOSURE || ctype == OT_CLOSURE) {
_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 SQ_UNUSED_ARG(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(newtop + (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("[" _PRINT_INT_FMT "]:"),n);
switch(sq_type(obj)){
case OT_FLOAT: scprintf(_SC("FLOAT %.3f"),_float(obj));break;
case OT_INTEGER: scprintf(_SC("INTEGER " _PRINT_INT_FMT),_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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