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/*
* Copyright (C) 2006-2019 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#pragma once
#include "Identifier.h"
#include <wtf/HashSet.h>
#include <wtf/Vector.h>
namespace JSC {
// FIXME: Rename to PropertyNameArray.
class PropertyNameArrayData : public RefCounted<PropertyNameArrayData> {
public:
typedef Vector<Identifier, 20> PropertyNameVector;
static Ref<PropertyNameArrayData> create() { return adoptRef(*new PropertyNameArrayData); }
PropertyNameVector& propertyNameVector() { return m_propertyNameVector; }
private:
PropertyNameArrayData()
{
}
PropertyNameVector m_propertyNameVector;
};
// FIXME: Rename to PropertyNameArrayBuilder.
class PropertyNameArray {
public:
PropertyNameArray(VM& vm, PropertyNameMode propertyNameMode, PrivateSymbolMode privateSymbolMode)
: m_data(PropertyNameArrayData::create())
, m_vm(vm)
, m_propertyNameMode(propertyNameMode)
, m_privateSymbolMode(privateSymbolMode)
{
}
VM& vm() { return m_vm; }
void add(uint32_t index)
{
add(Identifier::from(m_vm, index));
}
void add(const Identifier&);
void add(UniquedStringImpl*);
void addUnchecked(UniquedStringImpl*);
Identifier& operator[](unsigned i) { return m_data->propertyNameVector()[i]; }
const Identifier& operator[](unsigned i) const { return m_data->propertyNameVector()[i]; }
PropertyNameArrayData* data() { return m_data.get(); }
RefPtr<PropertyNameArrayData> releaseData() { return WTFMove(m_data); }
// FIXME: Remove these functions.
bool canAddKnownUniqueForStructure() const { return m_data->propertyNameVector().isEmpty(); }
typedef PropertyNameArrayData::PropertyNameVector::const_iterator const_iterator;
size_t size() const { return m_data->propertyNameVector().size(); }
const_iterator begin() const { return m_data->propertyNameVector().begin(); }
const_iterator end() const { return m_data->propertyNameVector().end(); }
bool includeSymbolProperties() const;
bool includeStringProperties() const;
PropertyNameMode propertyNameMode() const { return m_propertyNameMode; }
PrivateSymbolMode privateSymbolMode() const { return m_privateSymbolMode; }
private:
void addUncheckedInternal(UniquedStringImpl*);
bool isUidMatchedToTypeMode(UniquedStringImpl* identifier);
RefPtr<PropertyNameArrayData> m_data;
UncheckedKeyHashSet<UniquedStringImpl*> m_set;
VM& m_vm;
PropertyNameMode m_propertyNameMode;
PrivateSymbolMode m_privateSymbolMode;
};
ALWAYS_INLINE void PropertyNameArray::add(const Identifier& identifier)
{
add(identifier.impl());
}
ALWAYS_INLINE void PropertyNameArray::addUncheckedInternal(UniquedStringImpl* identifier)
{
m_data->propertyNameVector().append(Identifier::fromUid(m_vm, identifier));
}
ALWAYS_INLINE void PropertyNameArray::addUnchecked(UniquedStringImpl* identifier)
{
if (!isUidMatchedToTypeMode(identifier))
return;
addUncheckedInternal(identifier);
}
ALWAYS_INLINE void PropertyNameArray::add(UniquedStringImpl* identifier)
{
static constexpr unsigned setThreshold = 20;
ASSERT(identifier);
if (!isUidMatchedToTypeMode(identifier))
return;
if (size() < setThreshold) {
if (m_data->propertyNameVector().contains(identifier))
return;
} else {
if (m_set.isEmpty()) {
for (Identifier& name : m_data->propertyNameVector())
m_set.add(name.impl());
}
if (!m_set.add(identifier).isNewEntry)
return;
}
addUncheckedInternal(identifier);
}
ALWAYS_INLINE bool PropertyNameArray::isUidMatchedToTypeMode(UniquedStringImpl* identifier)
{
if (identifier->isSymbol()) {
if (!includeSymbolProperties())
return false;
if (UNLIKELY(m_privateSymbolMode == PrivateSymbolMode::Include))
return true;
return !static_cast<SymbolImpl*>(identifier)->isPrivate();
}
return includeStringProperties();
}
ALWAYS_INLINE bool PropertyNameArray::includeSymbolProperties() const
{
return static_cast<std::underlying_type<PropertyNameMode>::type>(m_propertyNameMode) & static_cast<std::underlying_type<PropertyNameMode>::type>(PropertyNameMode::Symbols);
}
ALWAYS_INLINE bool PropertyNameArray::includeStringProperties() const
{
return static_cast<std::underlying_type<PropertyNameMode>::type>(m_propertyNameMode) & static_cast<std::underlying_type<PropertyNameMode>::type>(PropertyNameMode::Strings);
}
} // namespace JSC
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