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/****************************************************************************
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**
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** Copyright (C) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the Qt Script Generator project on Qt Labs.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** 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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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef SYMBOL_H
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#define SYMBOL_H
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#include <QtCore/QString>
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#include <cstring>
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#include <QtCore/QHash>
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#include <QtCore/QPair>
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struct NameSymbol
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{
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const char *data;
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std::size_t count;
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inline QString as_string() const
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{
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return QString::fromUtf8(data, (int) count);
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}
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inline bool operator == (const NameSymbol &other) const
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{
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return count == other.count
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&& std::strncmp(data, other.data, count) == 0;
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}
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protected:
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inline NameSymbol() {}
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inline NameSymbol(const char *d, std::size_t c)
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: data(d), count(c) {}
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private:
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void operator = (const NameSymbol &);
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friend class NameTable;
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};
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inline uint qHash(const NameSymbol &r)
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{
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uint hash_value = 0;
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for (std::size_t i=0; i<r.count; ++i)
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hash_value = (hash_value << 5) - hash_value + r.data[i];
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return hash_value;
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}
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inline uint qHash(const QPair<const char*, std::size_t> &r)
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{
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uint hash_value = 0;
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for (std::size_t i=0; i<r.second; ++i)
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hash_value = (hash_value << 5) - hash_value + r.first[i];
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return hash_value;
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}
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class NameTable
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{
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public:
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typedef QPair<const char *, std::size_t> KeyType;
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typedef QHash<KeyType, NameSymbol*> ContainerType;
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public:
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NameTable() {}
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~NameTable()
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{
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qDeleteAll(_M_storage);
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}
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inline const NameSymbol *findOrInsert(const char *str, std::size_t len)
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{
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KeyType key(str, len);
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NameSymbol *name = _M_storage.value(key);
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if (!name)
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{
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name = new NameSymbol(str, len);
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_M_storage.insert(key, name);
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}
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return name;
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}
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inline std::size_t count() const
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{
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return _M_storage.size();
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}
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private:
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ContainerType _M_storage;
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private:
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NameTable(const NameTable &other);
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void operator = (const NameTable &other);
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};
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#endif // SYMBOL_H
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// kate: space-indent on; indent-width 2; replace-tabs on;
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