bool Array::isValidMultiname(const multiname& name, uint32_t& index)
{
//First of all the multiname has to contain the null namespace
//As the namespace vector is sorted, we check only the first one
assert_and_throw(name.ns.size()!=0);
if(!name.ns[0].hasEmptyName())
return false;
if (name.name_type == multiname::NAME_STRING &&
!isIntegerWithoutLeadingZeros(name.normalizedName()))
return false;
return name.toUInt(index);
}
void variables_map::killObjVar(const multiname& mname)
{
uint32_t name=mname.normalizedNameId();
//The namespaces in the multiname are ordered. So it's possible to use lower_bound
//to find the first candidate one and move from it
assert(!mname.ns.empty());
var_iterator ret=Variables.lower_bound(varName(name,mname.ns.front()));
auto nsIt=mname.ns.begin();
//Find the namespace
while(ret!=Variables.end() && ret->first.nameId==name)
{
//breaks when the namespace is not found
const nsNameAndKind& ns=ret->first.ns;
if(ns==*nsIt)
{
Variables.erase(ret);
return;
}
else if(*nsIt<ns)
{
++nsIt;
if(nsIt==mname.ns.end())
break;
}
else if(ns<*nsIt)
++ret;
}
throw RunTimeException("Variable to kill not found");
}
void variables_map::initializeVar(const multiname& mname, ASObject* obj, multiname* typemname, ABCContext* context, TRAIT_KIND traitKind)
{
const Type* type = NULL;
/* If typename is a builtin type, we coerce obj.
* It it's not it must be a user defined class,
* so we only allow Null and Undefined (which are both coerced to Null) */
type = Type::getBuiltinType(typemname);
if(type==NULL)
{
assert_and_throw(obj->is<Null>() || obj->is<Undefined>());
if(obj->is<Undefined>())
{
//Casting undefined to an object (of unknown class)
//results in Null
obj->decRef();
obj = getSys()->getNullRef();
}
}
else
obj = type->coerce(obj);
assert(traitKind==DECLARED_TRAIT || traitKind==CONSTANT_TRAIT);
uint32_t name=mname.normalizedNameId();
Variables.insert(make_pair(varName(name, mname.ns[0]), variable(traitKind, obj, typemname, type)));
}
_NR<ASObject> Proxy::getVariableByMultiname(const multiname& name, GET_VARIABLE_OPTION opt)
{
//It seems that various kind of implementation works only with the empty namespace
assert_and_throw(name.ns.size()>0);
if(!name.ns[0].hasEmptyName() || ASObject::hasPropertyByMultiname(name, true, true) || !implEnable || (opt & ASObject::SKIP_IMPL)!=0)
return ASObject::getVariableByMultiname(name,opt);
//Check if there is a custom getter defined, skipping implementation to avoid recursive calls
multiname getPropertyName(NULL);
getPropertyName.name_type=multiname::NAME_STRING;
getPropertyName.name_s_id=getSys()->getUniqueStringId("getProperty");
getPropertyName.ns.push_back(nsNameAndKind(flash_proxy,NAMESPACE));
_NR<ASObject> o=getVariableByMultiname(getPropertyName,ASObject::SKIP_IMPL);
if(o.isNull())
return ASObject::getVariableByMultiname(name,opt);
assert_and_throw(o->getObjectType()==T_FUNCTION);
IFunction* f=static_cast<IFunction*>(o.getPtr());
//Well, I don't how to pass multiname to an as function. I'll just pass the name as a string
ASObject* arg=Class<ASString>::getInstanceS(name.normalizedName());
//We now suppress special handling
implEnable=false;
LOG(LOG_CALLS,"Proxy::getProperty");
incRef();
_NR<ASObject> ret=_MNR(f->call(this,&arg,1));
implEnable=true;
return ret;
}
bool Vector::isValidMultiname(const multiname& name, uint32_t& index)
{
//First of all the multiname has to contain the null namespace
//As the namespace vector is sorted, we check only the first one
assert_and_throw(name.ns.size()!=0);
if(!name.ns[0].hasEmptyName())
return false;
bool validIndex=name.toUInt(index, true);
// Don't throw for non-numeric NAME_STRING or NAME_OBJECT
// because they can still be valid built-in property names.
if(!validIndex && (name.name_type==multiname::NAME_INT || name.name_type==multiname::NAME_NUMBER))
throwError<RangeError>(kOutOfRangeError, name.normalizedName(), "?");
return validIndex;
}
bool Proxy::deleteVariableByMultiname(const multiname& name)
{
//If a variable named like this already exist, use that
if(ASObject::hasPropertyByMultiname(name, true, false) || !implEnable)
{
return ASObject::deleteVariableByMultiname(name);
}
//Check if there is a custom deleter defined, skipping implementation to avoid recursive calls
multiname deletePropertyName(NULL);
deletePropertyName.name_type=multiname::NAME_STRING;
deletePropertyName.name_s_id=getSys()->getUniqueStringId("deleteProperty");
deletePropertyName.ns.push_back(nsNameAndKind(flash_proxy,NAMESPACE));
_NR<ASObject> proxyDeleter=getVariableByMultiname(deletePropertyName,ASObject::SKIP_IMPL);
if(proxyDeleter.isNull())
{
return ASObject::deleteVariableByMultiname(name);
}
assert_and_throw(proxyDeleter->getObjectType()==T_FUNCTION);
IFunction* f=static_cast<IFunction*>(proxyDeleter.getPtr());
//Well, I don't how to pass multiname to an as function. I'll just pass the name as a string
ASObject* arg=Class<ASString>::getInstanceS(name.normalizedName());
//We now suppress special handling
implEnable=false;
LOG(LOG_CALLS,_("Proxy::deleteProperty"));
incRef();
_NR<ASObject> ret=_MNR(f->call(this,&arg,1));
implEnable=true;
Boolean* b = static_cast<Boolean*>(ret.getPtr());
return b->val;
}
void Array::setVariableByMultiname(const multiname& name, ASObject* o, CONST_ALLOWED_FLAG allowConst)
{
assert_and_throw(implEnable);
uint32_t index=0;
if(!isValidMultiname(name,index))
return ASObject::setVariableByMultiname(name,o,allowConst);
// Derived classes may be sealed!
if (getClass() && getClass()->isSealed)
throwError<ReferenceError>(kWriteSealedError,
name.normalizedName(),
getClass()->getQualifiedClassName());
if (index==0xFFFFFFFF)
return;
if(index>=size())
resize((uint64_t)index+1);
if(data.count(index) && data[index].type==DATA_OBJECT && data[index].data)
data[index].data->decRef();
if(!data.count(index))
data[index] = data_slot();
if(o->getObjectType()==T_INTEGER)
{
Integer* i=static_cast<Integer*>(o);
data[index].data_i=i->val;
data[index].type=DATA_INT;
o->decRef();
}
else
{
data[index].data=o;
data[index].type=DATA_OBJECT;
}
}
void variables_map::initializeVar(const multiname& mname, ASObject* obj, multiname* typemname)
{
tiny_string name=mname.normalizedName();
const Type* type = NULL;
/* If typename is resolvable right now, we coerce obj.
* It it's not resolvable, then it must be a user defined class,
* so we only allow Null and Undefined (which are both coerced to Null) */
if(!Type::isTypeResolvable(typemname))
{
assert_and_throw(obj->is<Null>() || obj->is<Undefined>());
if(obj->is<Undefined>())
{
//Casting undefined to an object (of unknown class)
//results in Null
obj->decRef();
obj = new Null;
}
}
else
{
type = Type::getTypeFromMultiname(typemname);
obj = type->coerce(obj);
}
Variables.insert(make_pair(name, variable(mname.ns[0], DECLARED_TRAIT, obj, typemname, type)));
}
bool Array::isValidMultiname(const multiname& name, uint32_t& index)
{
//First of all the multiname has to contain the null namespace
//As the namespace vector is sorted, we check only the first one
assert_and_throw(name.ns.size()!=0);
if(!name.ns[0].hasEmptyName())
return false;
return name.toUInt(index);
}
bool Vector::isValidMultiname(SystemState* sys,const multiname& name, uint32_t& index)
{
//First of all the multiname has to contain the null namespace
//As the namespace vector is sorted, we check only the first one
assert_and_throw(name.ns.size()!=0);
if(!name.ns[0].hasEmptyName())
return false;
bool validIndex=name.toUInt(sys,index, true);
return validIndex;
}
void Vector::setVariableByMultiname(const multiname& name, ASObject* o, CONST_ALLOWED_FLAG allowConst)
{
assert_and_throw(name.ns.size()>0);
if(!name.ns[0].hasEmptyName())
return ASObject::setVariableByMultiname(name, o, allowConst);
unsigned int index=0;
if(!Vector::isValidMultiname(getSystemState(),name,index))
{
if (name.name_type == multiname::NAME_INT ||
(name.name_type == multiname::NAME_NUMBER && Number::isInteger(name.name_d)))
throwError<RangeError>(kOutOfRangeError,name.normalizedName(getSystemState()),Integer::toString(vec.size()));
if (!ASObject::hasPropertyByMultiname(name,false,true))
throwError<ReferenceError>(kWriteSealedError, name.normalizedName(getSystemState()), this->getClass()->getQualifiedClassName());
return ASObject::setVariableByMultiname(name, o, allowConst);
}
ASObject* o2 = this->vec_type->coerce(o);
if(index < vec.size())
{
if (vec[index])
vec[index]->decRef();
vec[index] = o2;
}
else if(!fixed && index == vec.size())
{
vec.push_back( o2 );
}
else
{
/* Spec says: one may not set a value with an index more than
* one beyond the current final index. */
throwError<RangeError>(kOutOfRangeError,
Integer::toString(index),
Integer::toString(vec.size()));
}
}
bool Proxy::hasPropertyByMultiname(const multiname& name, bool considerDynamic, bool considerPrototype)
{
if (name.normalizedName() == "isAttribute")
return true;
//If a variable named like this already exist, use that
bool asobject_has_property=ASObject::hasPropertyByMultiname(name, considerDynamic, considerPrototype);
if(asobject_has_property || !implEnable)
return asobject_has_property;
//Check if there is a custom hasProperty defined, skipping implementation to avoid recursive calls
multiname hasPropertyName(NULL);
hasPropertyName.name_type=multiname::NAME_STRING;
hasPropertyName.name_s_id=getSys()->getUniqueStringId("hasProperty");
hasPropertyName.ns.push_back(nsNameAndKind(flash_proxy,NAMESPACE));
_NR<ASObject> proxyHasProperty=getVariableByMultiname(hasPropertyName,ASObject::SKIP_IMPL);
if(proxyHasProperty.isNull())
{
return false;
}
assert_and_throw(proxyHasProperty->getObjectType()==T_FUNCTION);
IFunction* f=static_cast<IFunction*>(proxyHasProperty.getPtr());
ASObject* namearg = Class<ASString>::getInstanceS(name.normalizedName());
namearg->setProxyProperty(name);
ASObject* arg = namearg;
//We now suppress special handling
implEnable=false;
LOG(LOG_CALLS,_("Proxy::hasProperty"));
incRef();
_NR<ASObject> ret=_MNR(f->call(this,&arg,1));
implEnable=true;
Boolean* b = static_cast<Boolean*>(ret.getPtr());
return b->val;
}
void variables_map::killObjVar(const multiname& mname)
{
tiny_string name=mname.normalizedName();
const pair<var_iterator, var_iterator> ret=Variables.equal_range(name);
assert_and_throw(ret.first!=ret.second);
//Find the namespace
var_iterator start=ret.first;
for(;start!=ret.second;++start)
{
if(!is_disjoint(mname.ns,start->second.ns))
{
Variables.erase(start);
return;
}
}
throw RunTimeException("Variable to kill not found");
}
/* this handles the [] operator, because vec[12] becomes vec.12 in bytecode */
_NR<ASObject> Vector::getVariableByMultiname(const multiname& name, GET_VARIABLE_OPTION opt)
{
if((opt & SKIP_IMPL)!=0 || !implEnable)
return ASObject::getVariableByMultiname(name,opt);
assert_and_throw(name.ns.size()>0);
if(!name.ns[0].hasEmptyName())
return ASObject::getVariableByMultiname(name,opt);
unsigned int index=0;
if(!Vector::isValidMultiname(getSystemState(),name,index) || index == UINT32_MAX)
{
if (name.name_type == multiname::NAME_INT ||
(name.name_type == multiname::NAME_NUMBER && Number::isInteger(name.name_d)))
throwError<RangeError>(kOutOfRangeError,Integer::toString(name.name_i),Integer::toString(vec.size()));
_NR<ASObject> ret = ASObject::getVariableByMultiname(name,opt);
if (ret.isNull())
throwError<ReferenceError>(kReadSealedError, name.normalizedName(getSystemState()), this->getClass()->getQualifiedClassName());
return ret;
}
if(index < vec.size())
{
if (vec[index])
{
vec[index]->incRef();
return _MNR(vec[index]);
}
else
return _MNR(vec_type->coerce( getSystemState()->getNullRef() ));
}
else
{
throwError<RangeError>(kOutOfRangeError,
Integer::toString(index),
Integer::toString(vec.size()));
}
return NullRef;
}
void Proxy::setVariableByMultiname(const multiname& name, ASObject* o, CONST_ALLOWED_FLAG allowConst)
{
//If a variable named like this already exist, use that
if(ASObject::hasPropertyByMultiname(name, true, false) || !implEnable)
{
ASObject::setVariableByMultiname(name,o,allowConst);
return;
}
//Check if there is a custom setter defined, skipping implementation to avoid recursive calls
multiname setPropertyName(NULL);
setPropertyName.name_type=multiname::NAME_STRING;
setPropertyName.name_s_id=getSys()->getUniqueStringId("setProperty");
setPropertyName.ns.push_back(nsNameAndKind(flash_proxy,NAMESPACE));
_NR<ASObject> proxySetter=getVariableByMultiname(setPropertyName,ASObject::SKIP_IMPL);
if(proxySetter.isNull())
{
ASObject::setVariableByMultiname(name,o,allowConst);
return;
}
assert_and_throw(proxySetter->getObjectType()==T_FUNCTION);
IFunction* f=static_cast<IFunction*>(proxySetter.getPtr());
ASObject* namearg = Class<ASString>::getInstanceS(name.normalizedName());
namearg->setProxyProperty(name);
ASObject* args[2];
args[0]=namearg;
args[1]=o;
//We now suppress special handling
implEnable=false;
LOG(LOG_CALLS,_("Proxy::setProperty"));
incRef();
_R<ASObject> ret=_MR( f->call(this,args,2) );
assert_and_throw(ret->is<Undefined>());
implEnable=true;
}
void ASObject::setVariableByMultiname(const multiname& name, ASObject* o, Class_base* cls)
{
check();
assert(!cls || classdef->isSubClass(cls));
//NOTE: we assume that [gs]etSuper and [sg]etProperty correctly manipulate the cur_level (for getActualClass)
bool has_getter=false;
variable* obj=findSettable(name, false, &has_getter);
if(!obj && cls)
{
//Look for borrowed traits before
//It's valid to override only a getter, so keep
//looking for a settable even if a super class sets
//has_getter to true.
obj=cls->findSettable(name,true,&has_getter);
}
if(!obj && cls)
{
//Look in prototype chain
ASObject* proto = cls->prototype.getPtr();
while(proto)
{
variable* tmp = proto->findSettable(name, false, NULL /*prototypes never have getters/setters*/);
if(tmp)
{
if (tmp->kind != DYNAMIC_TRAIT) // dynamic prototype properties can be overridden
obj = tmp;
break;
}
proto = proto->getprop_prototype();
}
}
if(!obj)
{
if(has_getter)
{
tiny_string err=tiny_string("Error #1074: Illegal write to read-only property ")+name.normalizedName();
if(cls)
err+=tiny_string(" on type ")+cls->getQualifiedClassName();
throw Class<ReferenceError>::getInstanceS(err);
}
//Create a new dynamic variable
obj=Variables.findObjVar(name,DYNAMIC_TRAIT,DYNAMIC_TRAIT);
}
if(obj->setter)
{
//Call the setter
LOG(LOG_CALLS,_("Calling the setter"));
//Overriding function is automatically done by using cur_level
IFunction* setter=obj->setter;
//One argument can be passed without creating an array
ASObject* target=this;
target->incRef();
_R<ASObject> ret= _MR( setter->call(target,&o,1) );
assert_and_throw(ret->is<Undefined>());
LOG(LOG_CALLS,_("End of setter"));
}
else
{
assert_and_throw(!obj->getter);
obj->setVar(o);
}
}
int JSON::parse(const tiny_string &jsonstring, int pos, ASObject** parent , const multiname& key, IFunction *reviver)
{
while (jsonstring.charAt(pos) == ' ' ||
jsonstring.charAt(pos) == '\t' ||
jsonstring.charAt(pos) == '\n' ||
jsonstring.charAt(pos) == '\r'
)
pos++;
int len = jsonstring.numBytes();
if (pos < len)
{
char c = jsonstring.charAt(pos);
switch(c)
{
case '{':
pos = parseObject(jsonstring,pos,parent,key, reviver);
break;
case '[':
pos = parseArray(jsonstring,pos,parent,key, reviver);
break;
case '"':
pos = parseString(jsonstring,pos,parent,key);
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case '-':
pos = parseNumber(jsonstring,pos,parent,key);
break;
case 't':
pos = parseTrue(jsonstring,pos,parent,key);
break;
case 'f':
pos = parseFalse(jsonstring,pos,parent,key);
break;
case 'n':
pos = parseNull(jsonstring,pos,parent,key);
break;
default:
throwError<SyntaxError>(kJSONInvalidParseInput);
}
}
if (reviver)
{
bool haskey = key.name_type!= multiname::NAME_OBJECT;
ASObject* params[2];
if (haskey)
{
params[0] = Class<ASString>::getInstanceS(key.normalizedName());
if ((*parent)->hasPropertyByMultiname(key,true,false))
{
params[1] = (*parent)->getVariableByMultiname(key).getPtr();
params[1]->incRef();
}
else
params[1] = getSys()->getNullRef();
}
else
{
params[0] = Class<ASString>::getInstanceS("");
params[1] = *parent;
params[1]->incRef();
}
ASObject *funcret=reviver->call(getSys()->getNullRef(), params, 2);
if(funcret)
{
if (haskey)
{
if (funcret->is<Undefined>())
{
(*parent)->deleteVariableByMultiname(key);
funcret->decRef();
}
else
{
(*parent)->setVariableByMultiname(key,funcret,ASObject::CONST_NOT_ALLOWED);
}
}
else
*parent= funcret;
}
}
return pos;
}
void ASObject::setVariableByMultiname(const multiname& name, ASObject* o, CONST_ALLOWED_FLAG allowConst, Class_base* cls)
{
check();
assert(!cls || classdef->isSubClass(cls));
//NOTE: we assume that [gs]etSuper and [sg]etProperty correctly manipulate the cur_level (for getActualClass)
bool has_getter=false;
variable* obj=findSettable(name, &has_getter);
if (obj && (obj->kind == CONSTANT_TRAIT && allowConst==CONST_NOT_ALLOWED))
{
tiny_string err=tiny_string("Error #1074: Illegal write to read-only property ")+name.normalizedName();
if(classdef)
err+=tiny_string(" on type ")+classdef->as<Class_base>()->getQualifiedClassName();
throw Class<ReferenceError>::getInstanceS(err);
}
if(!obj && cls)
{
//Look for borrowed traits before
//It's valid to override only a getter, so keep
//looking for a settable even if a super class sets
//has_getter to true.
obj=cls->findBorrowedSettable(name,&has_getter);
if(obj && cls->isFinal && !obj->setter)
{
tiny_string err=tiny_string("Error #1037: Cannot assign to a method ")+name.normalizedName()+tiny_string(" on ")+cls->getQualifiedClassName();
throw Class<ReferenceError>::getInstanceS(err);
}
}
//Do not lookup in the prototype chain. This is tested behaviour
if(!obj)
{
if(has_getter)
{
tiny_string err=tiny_string("Error #1074: Illegal write to read-only property ")+name.normalizedName();
if(cls)
err+=tiny_string(" on type ")+cls->getQualifiedClassName();
throw Class<ReferenceError>::getInstanceS(err);
}
//Create a new dynamic variable
obj=Variables.findObjVar(name,DYNAMIC_TRAIT,DYNAMIC_TRAIT);
}
if(obj->setter)
{
//Call the setter
LOG(LOG_CALLS,_("Calling the setter"));
//Overriding function is automatically done by using cur_level
IFunction* setter=obj->setter;
//One argument can be passed without creating an array
ASObject* target=this;
target->incRef();
_R<ASObject> ret= _MR( setter->call(target,&o,1) );
assert_and_throw(ret->is<Undefined>());
LOG(LOG_CALLS,_("End of setter"));
}
else
{
assert_and_throw(!obj->getter);
obj->setVar(o);
}
}
