Source/WebCore/dom/QualifiedNameCache.cpp

/*
 * Copyright (C) 2017 Apple Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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#include "config.h"
#include "QualifiedNameCache.h"

namespace WebCore {

struct QNameComponentsTranslator {
    static unsigned hash(const QualifiedNameComponents& components)
    {
        return computeHash(components);
    }
    static bool equal(QualifiedName::QualifiedNameImpl* name, const QualifiedNameComponents& c)
    {
        return c.m_prefix == name->m_prefix.impl() && c.m_localName == name->m_localName.impl() && c.m_namespace == name->m_namespace.impl();
    }
    static void translate(QualifiedName::QualifiedNameImpl*& location, const QualifiedNameComponents& components, unsigned)
    {
        location = &QualifiedName::QualifiedNameImpl::create(components.m_prefix, components.m_localName, components.m_namespace).leakRef();
    }
};

Ref<QualifiedName::QualifiedNameImpl> QualifiedNameCache::getOrCreate(const QualifiedNameComponents& components)
{
    QNameSet::AddResult addResult = m_cache.add<QNameComponentsTranslator>(components);
    return addResult.isNewEntry ? adoptRef(**addResult.iterator) : Ref<QualifiedName::QualifiedNameImpl> { **addResult.iterator };
}

void QualifiedNameCache::remove(QualifiedName::QualifiedNameImpl& impl)
{
    m_cache.remove(&impl);
}

} // namespace WebCore