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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Script Generator project on Qt Labs.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, 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.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef SYMBOL_H
#define SYMBOL_H
#include <QtCore/QString>
#include <cstring>
#include <QtCore/QHash>
#include <QtCore/QPair>
struct NameSymbol
{
const char *data;
std::size_t count;
inline QString as_string() const
{
return QString::fromUtf8(data, (int) count);
}
inline bool operator == (const NameSymbol &other) const
{
return count == other.count
&& std::strncmp(data, other.data, count) == 0;
}
protected:
inline NameSymbol() {}
inline NameSymbol(const char *d, std::size_t c)
: data(d), count(c) {}
private:
void operator = (const NameSymbol &);
friend class NameTable;
};
inline uint qHash(const NameSymbol &r)
{
uint hash_value = 0;
for (std::size_t i=0; i<r.count; ++i)
hash_value = (hash_value << 5) - hash_value + r.data[i];
return hash_value;
}
inline uint qHash(const QPair<const char*, std::size_t> &r)
{
uint hash_value = 0;
for (std::size_t i=0; i<r.second; ++i)
hash_value = (hash_value << 5) - hash_value + r.first[i];
return hash_value;
}
class NameTable
{
public:
typedef QPair<const char *, std::size_t> KeyType;
typedef QHash<KeyType, NameSymbol*> ContainerType;
public:
NameTable() {}
~NameTable()
{
qDeleteAll(_M_storage);
}
inline const NameSymbol *findOrInsert(const char *str, std::size_t len)
{
KeyType key(str, len);
NameSymbol *name = _M_storage.value(key);
if (!name)
{
name = new NameSymbol(str, len);
_M_storage.insert(key, name);
}
return name;
}
inline std::size_t count() const
{
return _M_storage.size();
}
private:
ContainerType _M_storage;
private:
NameTable(const NameTable &other);
void operator = (const NameTable &other);
};
#endif // SYMBOL_H
// kate: space-indent on; indent-width 2; replace-tabs on;
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