ScriptObject* ScriptObject::getSlotObject(uint32_t slot)
{
Traits* traits = this->traits();
const TraitsBindingsp td = traits->getTraitsBindings();
void* p;
const SlotStorageType sst = td->calcSlotAddrAndSST(slot, (void*)this, p);
// based on profiling of Flex apps, it's *much* more common for the slot in this case
// to have a type (vs "atom"), so check for that first...
if (sst == SST_scriptobject)
{
return *((ScriptObject**)p);
}
else if (sst == SST_atom)
{
Atom const a = *((const Atom*)p);
// don't call AvmCore::isObject(); it checks for null, which we don't care about here
if (atomKind(a) == kObjectType)
return (ScriptObject*)atomPtr(a);
// else fall thru and return null
}
return NULL;
}
Atom ScriptObject::getSlotAtom(uint32_t slot)
{
Traits* traits = this->traits();
const TraitsBindingsp td = traits->getTraitsBindings();
// repeated if-else is actually more performant than a switch statement in this case.
// SST_atom is most common case, put it first
void* p;
const SlotStorageType sst = td->calcSlotAddrAndSST(slot, (void*)this, p);
if (sst == SST_atom)
{
return *((const Atom*)p);
}
else if (sst == SST_double)
{
return traits->core->doubleToAtom(*((const double*)p));
}
else if (sst == SST_int32)
{
return traits->core->intToAtom(*((const int32_t*)p));
}
else if (sst == SST_uint32)
{
return traits->core->uintToAtom(*((const int32_t*)p));
}
else if (sst == SST_bool32)
{
return (*((const int32_t*)p)<<3)|kBooleanType;
}
else if (sst == SST_string)
{
return (*((const Stringp*)p))->atom(); // may be null|kStringType, that's ok
}
else if (sst == SST_namespace)
{
return (*((const Namespacep*)p))->atom(); // may be null|kNamespaceType, no problemo
}
else // if (sst == SST_scriptobject)
{
AvmAssert(sst == SST_scriptobject);
return (*((const ScriptObject**)p))->atom(); // may be null|kObjectType, copacetic
}
}
// note: coerceAndSetSlotAtom now includes a simplified and streamlined version
// of Toplevel::coerce. If you modify that code, you might need to modify this code.
void ScriptObject::coerceAndSetSlotAtom(uint32_t slot, Atom value)
{
Traits* traits = this->traits();
const TraitsBindingsp td = traits->getTraitsBindings();
void* p;
const SlotStorageType sst = td->calcSlotAddrAndSST(slot, (void*)this, p);
// repeated if-else is actually more performant than a switch statement in this case.
// SST_atom is most common case, put it first
if (sst == SST_atom)
{
// no call to coerce() needed, since anything will fit here... with one exception:
// BUILTIN_object needs to convert undefined->null (though BUILTIN_any does not).
// it's cheaper to do that here than call out to coerce().
AvmAssert(td->getSlotTraits(slot) == NULL || td->getSlotTraits(slot)->builtinType == BUILTIN_object);
if (value == undefinedAtom && td->getSlotTraits(slot) != NULL)
value = nullObjectAtom;
WBATOM(traits->core->GetGC(), this, (Atom*)p, value);
}
else if (sst == SST_double)
{
*((double*)p) = AvmCore::number(value);
}
else if (sst == SST_int32)
{
*((int32_t*)p) = AvmCore::integer(value);
}
else if (sst == SST_uint32)
{
*((uint32_t*)p) = AvmCore::toUInt32(value);
}
else if (sst == SST_bool32)
{
*((int32_t*)p) = AvmCore::boolean(value);
}
else
{
// null/undefined -> NULL for all of these
if (AvmCore::isNullOrUndefined(value))
{
value = (Atom)0; // don't bother setting tag bits
}
else if (sst == SST_string)
{
value = (Atom)traits->core->string(value); // don't bother setting tag bits
}
else if (sst == SST_namespace)
{
// Namespace is final, so we don't have to do the hard work
if (atomKind(value) != kNamespaceType)
goto failure;
}
else // if (sst == SST_scriptobject)
{
AvmAssert(sst == SST_scriptobject);
if (atomKind(value) != kObjectType || !AvmCore::atomToScriptObject(value)->traits()->subtypeof(td->getSlotTraits(slot)))
goto failure;
}
WBRC(traits->core->GetGC(), this, p, atomPtr(value));
}
return;
failure:
toplevel()->throwTypeError(kCheckTypeFailedError, traits->core->atomToErrorString(value), traits->core->toErrorString(td->getSlotTraits(slot)));
return;
}