SparseArrayValueMap.h [plain text]
#ifndef SparseArrayValueMap_h
#define SparseArrayValueMap_h
#include "JSCell.h"
#include "JSTypeInfo.h"
#include "PropertyDescriptor.h"
#include "PutDirectIndexMode.h"
#include "WriteBarrier.h"
#include <wtf/HashMap.h>
#include <wtf/Platform.h>
namespace JSC {
class SparseArrayValueMap;
struct SparseArrayEntry : public WriteBarrier<Unknown> {
typedef WriteBarrier<Unknown> Base;
SparseArrayEntry() : attributes(0) { }
JSValue get(ExecState*, JSObject*) const;
void get(PropertySlot&) const;
void get(PropertyDescriptor&) const;
void put(ExecState*, JSValue thisValue, SparseArrayValueMap*, JSValue, bool shouldThrow);
JSValue getNonSparseMode() const;
unsigned attributes;
};
class SparseArrayValueMap : public JSCell {
public:
typedef JSCell Base;
private:
typedef HashMap<uint64_t, SparseArrayEntry, WTF::IntHash<uint64_t>, WTF::UnsignedWithZeroKeyHashTraits<uint64_t> > Map;
enum Flags {
Normal = 0,
SparseMode = 1,
LengthIsReadOnly = 2,
};
SparseArrayValueMap(VM&);
~SparseArrayValueMap();
void finishCreation(VM&);
static const unsigned StructureFlags = OverridesVisitChildren | JSCell::StructureFlags;
public:
static JS_EXPORTDATA const ClassInfo s_info;
typedef Map::iterator iterator;
typedef Map::const_iterator const_iterator;
typedef Map::AddResult AddResult;
static SparseArrayValueMap* create(VM&);
static const bool needsDestruction = true;
static const bool hasImmortalStructure = true;
static void destroy(JSCell*);
static Structure* createStructure(VM&, JSGlobalObject*, JSValue prototype);
static void visitChildren(JSCell*, SlotVisitor&);
bool sparseMode()
{
return m_flags & SparseMode;
}
void setSparseMode()
{
m_flags = static_cast<Flags>(m_flags | SparseMode);
}
bool lengthIsReadOnly()
{
return m_flags & LengthIsReadOnly;
}
void setLengthIsReadOnly()
{
m_flags = static_cast<Flags>(m_flags | LengthIsReadOnly);
}
void putEntry(ExecState*, JSObject*, unsigned, JSValue, bool shouldThrow);
bool putDirect(ExecState*, JSObject*, unsigned, JSValue, unsigned attributes, PutDirectIndexMode);
AddResult add(JSObject*, unsigned);
iterator find(unsigned i) { return m_map.find(i); }
void remove(iterator it) { m_map.remove(it); }
void remove(unsigned i) { m_map.remove(i); }
iterator notFound() { return m_map.end(); }
bool isEmpty() const { return m_map.isEmpty(); }
bool contains(unsigned i) const { return m_map.contains(i); }
size_t size() const { return m_map.size(); }
const_iterator begin() const { return m_map.begin(); }
const_iterator end() const { return m_map.end(); }
private:
Map m_map;
Flags m_flags;
size_t m_reportedCapacity;
};
}
#endif // SparseArrayValueMap_h