SparseArrayValueMap.cpp [plain text]
#include "config.h"
#include "SparseArrayValueMap.h"
#include "ClassInfo.h"
#include "GetterSetter.h"
#include "JSObject.h"
#include "JSCInlines.h"
#include "PropertySlot.h"
#include "Reject.h"
#include "SlotVisitor.h"
#include "Structure.h"
namespace JSC {
const ClassInfo SparseArrayValueMap::s_info = { "SparseArrayValueMap", 0, 0, 0, CREATE_METHOD_TABLE(SparseArrayValueMap) };
SparseArrayValueMap::SparseArrayValueMap(VM& vm)
: Base(vm, vm.sparseArrayValueMapStructure.get())
, m_flags(Normal)
, m_reportedCapacity(0)
{
}
SparseArrayValueMap::~SparseArrayValueMap()
{
}
void SparseArrayValueMap::finishCreation(VM& vm)
{
Base::finishCreation(vm);
}
SparseArrayValueMap* SparseArrayValueMap::create(VM& vm)
{
SparseArrayValueMap* result = new (NotNull, allocateCell<SparseArrayValueMap>(vm.heap)) SparseArrayValueMap(vm);
result->finishCreation(vm);
return result;
}
void SparseArrayValueMap::destroy(JSCell* cell)
{
static_cast<SparseArrayValueMap*>(cell)->SparseArrayValueMap::~SparseArrayValueMap();
}
Structure* SparseArrayValueMap::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(CompoundType, StructureFlags), info());
}
SparseArrayValueMap::AddResult SparseArrayValueMap::add(JSObject* array, unsigned i)
{
SparseArrayEntry entry;
entry.setWithoutWriteBarrier(jsUndefined());
AddResult result = m_map.add(i, entry);
size_t capacity = m_map.capacity();
if (capacity != m_reportedCapacity) {
Heap::heap(array)->reportExtraMemoryCost((capacity - m_reportedCapacity) * (sizeof(unsigned) + sizeof(WriteBarrier<Unknown>)));
m_reportedCapacity = capacity;
}
return result;
}
void SparseArrayValueMap::putEntry(ExecState* exec, JSObject* array, unsigned i, JSValue value, bool shouldThrow)
{
AddResult result = add(array, i);
SparseArrayEntry& entry = result.iterator->value;
if (result.isNewEntry && !array->isExtensible()) {
remove(result.iterator);
if (shouldThrow)
throwTypeError(exec, StrictModeReadonlyPropertyWriteError);
return;
}
entry.put(exec, array, this, value, shouldThrow);
}
bool SparseArrayValueMap::putDirect(ExecState* exec, JSObject* array, unsigned i, JSValue value, unsigned attributes, PutDirectIndexMode mode)
{
AddResult result = add(array, i);
SparseArrayEntry& entry = result.iterator->value;
if (mode != PutDirectIndexLikePutDirect && result.isNewEntry && !array->isExtensible()) {
remove(result.iterator);
return reject(exec, mode == PutDirectIndexShouldThrow, "Attempting to define property on object that is not extensible.");
}
entry.attributes = attributes;
entry.set(exec->vm(), this, value);
return true;
}
void SparseArrayEntry::get(JSObject* thisObject, PropertySlot& slot) const
{
JSValue value = Base::get();
ASSERT(value);
if (LIKELY(!value.isGetterSetter())) {
slot.setValue(thisObject, attributes, value);
return;
}
slot.setGetterSlot(thisObject, attributes, jsCast<GetterSetter*>(value));
}
void SparseArrayEntry::get(PropertyDescriptor& descriptor) const
{
descriptor.setDescriptor(Base::get(), attributes);
}
JSValue SparseArrayEntry::get(ExecState* exec, JSObject* array) const
{
JSValue value = Base::get();
ASSERT(value);
if (LIKELY(!value.isGetterSetter()))
return value;
return callGetter(exec, array, jsCast<GetterSetter*>(value));
}
void SparseArrayEntry::put(ExecState* exec, JSValue thisValue, SparseArrayValueMap* map, JSValue value, bool shouldThrow)
{
if (!(attributes & Accessor)) {
if (attributes & ReadOnly) {
if (shouldThrow)
throwTypeError(exec, StrictModeReadonlyPropertyWriteError);
return;
}
set(exec->vm(), map, value);
return;
}
callSetter(exec, thisValue, Base::get(), value, shouldThrow ? StrictMode : NotStrictMode);
}
JSValue SparseArrayEntry::getNonSparseMode() const
{
ASSERT(!attributes);
return Base::get();
}
void SparseArrayValueMap::visitChildren(JSCell* thisObject, SlotVisitor& visitor)
{
Base::visitChildren(thisObject, visitor);
SparseArrayValueMap* thisMap = jsCast<SparseArrayValueMap*>(thisObject);
iterator end = thisMap->m_map.end();
for (iterator it = thisMap->m_map.begin(); it != end; ++it)
visitor.append(&it->value);
}
}