/*
* We can reify non-escaping iterator objects instead of having to wrap them. This
* allows fast iteration over objects across a compartment boundary.
*/
static bool
CanReify(Value *vp)
{
JSObject *obj;
return vp->isObject() &&
(obj = &vp->toObject())->getClass() == &IteratorClass &&
(obj->getNativeIterator()->flags & JSITER_ENUMERATE);
}
static bool
Reify(JSContext *cx, JSCompartment *origin, Value *vp)
{
JSObject *iterObj = &vp->toObject();
NativeIterator *ni = iterObj->getNativeIterator();
/* Wrap the iteratee. */
JSObject *obj = ni->obj;
if (!origin->wrap(cx, &obj))
return false;
/*
* Wrap the elements in the iterator's snapshot.
* N.B. the order of closing/creating iterators is important due to the
* implicit cx->enumerators state.
*/
if (ni->isKeyIter()) {
size_t length = ni->numKeys();
AutoIdVector keys(cx);
if (length > 0) {
if (!keys.resize(length))
return false;
for (size_t i = 0; i < length; ++i) {
keys[i] = ni->beginKey()[i];
if (!origin->wrapId(cx, &keys[i]))
return false;
}
}
return js_CloseIterator(cx, iterObj) &&
VectorToKeyIterator(cx, obj, ni->flags, keys, vp);
}
size_t length = ni->numValues();
AutoValueVector vals(cx);
if (length > 0) {
if (!vals.resize(length))
return false;
for (size_t i = 0; i < length; ++i) {
vals[i] = ni->beginValue()[i];
if (!origin->wrap(cx, &vals[i]))
return false;
}
}
return js_CloseIterator(cx, iterObj) &&
VectorToValueIterator(cx, obj, ni->flags, vals, vp);
}
static bool
Reify(JSContext *cx, JSCompartment *origin, Value *vp)
{
JSObject *iterObj = &vp->toObject();
NativeIterator *ni = iterObj->getNativeIterator();
AutoCloseIterator close(cx, iterObj);
/* Wrap the iteratee. */
RootedVarObject obj(cx, ni->obj);
if (!origin->wrap(cx, obj.address()))
return false;
/*
* Wrap the elements in the iterator's snapshot.
* N.B. the order of closing/creating iterators is important due to the
* implicit cx->enumerators state.
*/
size_t length = ni->numKeys();
bool isKeyIter = ni->isKeyIter();
AutoIdVector keys(cx);
if (length > 0) {
if (!keys.reserve(length))
return false;
for (size_t i = 0; i < length; ++i) {
jsid id;
if (!ValueToId(cx, StringValue(ni->begin()[i]), &id))
return false;
id = js_CheckForStringIndex(id);
keys.infallibleAppend(id);
if (!origin->wrapId(cx, &keys[i]))
return false;
}
}
close.clear();
if (!CloseIterator(cx, iterObj))
return false;
if (isKeyIter)
return VectorToKeyIterator(cx, obj, ni->flags, keys, vp);
return VectorToValueIterator(cx, obj, ni->flags, keys, vp);
}
