/* static */ bool
ObjectElements::ConvertElementsToDoubles(JSContext *cx, uintptr_t elementsPtr)
{
/*
* This function is infallible, but has a fallible interface so that it can
* be called directly from Ion code. Only arrays can have their dense
* elements converted to doubles, and arrays never have empty elements.
*/
HeapSlot *elementsHeapPtr = (HeapSlot *) elementsPtr;
JS_ASSERT(elementsHeapPtr != emptyObjectElements);
ObjectElements *header = ObjectElements::fromElements(elementsHeapPtr);
JS_ASSERT(!header->shouldConvertDoubleElements());
// Note: the elements can be mutated in place even for copy on write
// arrays. See comment on ObjectElements.
Value *vp = (Value *) elementsPtr;
for (size_t i = 0; i < header->initializedLength; i++) {
if (vp[i].isInt32())
vp[i].setDouble(vp[i].toInt32());
}
header->setShouldConvertDoubleElements();
return true;
}
