id.cpp 2.67 KB
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/**************************************************************************
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**
** This file is part of Qt Creator
**
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** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Nokia Corporation (info@qt.nokia.com)
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**
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**
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** GNU Lesser General Public License Usage
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**
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** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this file.
** Please review the following information to ensure the GNU Lesser General
** Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
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** Other Usage
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** Alternatively, this file may be used in accordance with the terms and
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** If you have questions regarding the use of this file, please contact
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** Nokia at info@qt.nokia.com.
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**
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**************************************************************************/
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#include "id.h"
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#include "coreconstants.h"
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#include "icontext.h"
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#include <utils/qtcassert.h>

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#include <QtCore/QHash>
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#include <QtCore/QDebug>
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namespace Core {
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/*!
    \class Core::Id
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    \brief The class Id encapsulates an identifier. It is used as a type-safe
    helper class instead of a \c QString or \c QByteArray. The internal
    representation of the id is assumed to be plain 7-bit-clean ASCII.

*/

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static int lastUid = 0;
static QVector<QByteArray> stringFromId;
static QHash<QByteArray, int> idFromString;
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static int theId(const QByteArray &ba)
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{
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    QTC_ASSERT(!ba.isEmpty(), /**/);
    int res = idFromString.value(ba);
    if (res == 0) {
        if (lastUid == 0)
            stringFromId.append(QByteArray());
        res = ++lastUid;
        idFromString[ba] = res;
        stringFromId.append(ba);
    }
    return res;
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}

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Id::Id(const char *name)
    : m_id(theId(name))
{}
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Id::Id(const QString &name)
   : m_id(theId(name.toLatin1()))
{}

QByteArray Id::name() const
{
    return stringFromId.at(m_id);
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}

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QString Id::toString() const
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{
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    return QString::fromLatin1(stringFromId[m_id]);
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}

Context::Context(const char *id, int offset)
{
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    d.append(Id(QString(id) + QString::number(offset)).uniqueIdentifier());
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}

void Context::add(const char *id)
{
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    d.append(Id(id).uniqueIdentifier());
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}

bool Context::contains(const char *id) const
{
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    return d.contains(Id(id).uniqueIdentifier());
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}
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} // namespace Core