qv4identifierhash_p.h

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// Copyright (C) 2016 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

// Qt-Security score:significant

#ifndef QV4IDENTIFIERHASH_P_H

#define QV4IDENTIFIERHASH_P_H

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists purely as an

// implementation detail.  This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#include <private/qv4global_p.h>

#include <private/qv4propertykey_p.h>

#include <QtCore/qstring.h>

QT_BEGIN_NAMESPACE

namespace QV4 {

struct IdentifierHashEntry;

struct IdentifierHashData;

struct IdentifierHash

    IdentifierHash() = default;

    IdentifierHash(ExecutionEngine *engine);

    IdentifierHash(const IdentifierHash &other);

    IdentifierHash(IdentifierHash &&other) noexcept : d(std::exchange(other.d, nullptr)) {}

    ~IdentifierHash();

    IdentifierHash &operator=(const IdentifierHash &other);

    void swap(IdentifierHash &other) noexcept { qt_ptr_swap(d, other.d); }

    QT_MOVE_ASSIGNMENT_OPERATOR_IMPL_VIA_MOVE_AND_SWAP(IdentifierHash)

    bool isValid() const { return d; }

    int size() const;

    void add(const QString &str, int value) { addEntry(toIdentifier(str), value); }

    void add(Heap::String *str, int value) { addEntry(toIdentifier(str), value); }

    int value(const QString &str) const { return lookup(toIdentifier(str)); }

    int value(Heap::String *str) const { return lookup(toIdentifier(str)); }

    template<typename String>

    String key(int value) const { return toString<String>(reverseLookup(value)); }

private:

    void addEntry(PropertyKey i, int value);

    int lookup(PropertyKey identifier) const;

    PropertyKey reverseLookup(int value) const;

    PropertyKey toIdentifier(const QString &str) const;

    PropertyKey toIdentifier(Heap::String *str) const;

    template<typename String>

    String toString(PropertyKey key) const;

    IdentifierHashData *d = nullptr;

};

template<> Heap::String *IdentifierHash::toString<Heap::String *>(PropertyKey key) const;

template<> QString IdentifierHash::toString<QString>(PropertyKey key) const;

} // namespace QV4

QT_END_NAMESPACE

#endif // QV4_IDENTIFIERHASH_P_H