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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the $MODULE$ of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, 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.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QSTRINGBUILDER_H
#define QSTRINGBUILDER_H
#include <QtCore/qstring.h>
#include <string.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Core)
// ### Qt 5: merge with QLatin1String
class QLatin1Literal
{
public:
template <int N>
QLatin1Literal(const char (&str)[N]) : m_size(N - 1), m_data(str) {}
inline int size() const { return m_size; }
inline const char *data() const { return m_data; }
private:
const int m_size;
const char *m_data;
};
template <typename T> class QConcatenable {};
template <typename A, typename B>
class QStringBuilder
{
public:
QStringBuilder(const A &a_, const B &b_) : a(a_), b(b_) {}
operator QString() const
{
QString s(QConcatenable< QStringBuilder<A, B> >::size(*this),
QString::Uninitialized());
QChar *d = s.data();
QConcatenable< QStringBuilder<A, B> >::appendTo(*this, d);
return s;
}
QByteArray toLatin1() const { return QString(*this).toLatin1(); }
const A &a;
const B &b;
};
template <> struct QConcatenable<char>
{
typedef char type;
static int size(const char) { return 1; }
static inline void appendTo(const char c, QChar *&out)
{
*out++ = QLatin1Char(c);
}
};
template <> struct QConcatenable<QLatin1Char>
{
typedef QLatin1Char type;
static int size(const QLatin1Char) { return 1; }
static inline void appendTo(const QLatin1Char c, QChar *&out)
{
*out++ = c;
}
};
template <> struct QConcatenable<QChar>
{
typedef QChar type;
static int size(const QChar) { return 1; }
static inline void appendTo(const QChar c, QChar *&out)
{
*out++ = c;
}
};
template <> struct QConcatenable<QLatin1String>
{
typedef QLatin1String type;
static int size(const QLatin1String &a) { return qstrlen(a.latin1()); }
static inline void appendTo(const QLatin1String &a, QChar *&out)
{
for (const char *s = a.latin1(); *s; )
*out++ = QLatin1Char(*s++);
}
};
template <> struct QConcatenable<QLatin1Literal>
{
typedef QLatin1Literal type;
static int size(const QLatin1Literal &a) { return a.size(); }
static inline void appendTo(const QLatin1Literal &a, QChar *&out)
{
for (const char *s = a.data(); *s; )
*out++ = QLatin1Char(*s++);
}
};
template <> struct QConcatenable<QString>
{
typedef QString type;
static int size(const QString &a) { return a.size(); }
static inline void appendTo(const QString &a, QChar *&out)
{
const int n = a.size();
memcpy(out, (char*)a.constData(), sizeof(QChar) * n);
out += n;
}
};
template <> struct QConcatenable<QStringRef>
{
typedef QStringRef type;
static int size(const QStringRef &a) { return a.size(); }
static inline void appendTo(QStringRef a, QChar *&out)
{
const int n = a.size();
memcpy(out, (char*)a.constData(), sizeof(QChar) * n);
out += n;
}
};
template <typename A, typename B>
struct QConcatenable< QStringBuilder<A, B> >
{
typedef QStringBuilder<A, B> type;
static int size(const type &p)
{
return QConcatenable<A>::size(p.a) + QConcatenable<B>::size(p.b);
}
static inline void appendTo(const QStringBuilder<A, B> &p, QChar *&out)
{
QConcatenable<A>::appendTo(p.a, out);
QConcatenable<B>::appendTo(p.b, out);
}
};
template <typename A, typename B>
QStringBuilder<typename QConcatenable<A>::type, typename QConcatenable<B>::type>
operator%(const A &a, const B &b)
{
return QStringBuilder<A, B>(a, b);
}
#ifdef QT_USE_FAST_OPERATOR_PLUS
template <typename A, typename B>
QStringBuilder<typename QConcatenable<A>::type, typename QConcatenable<B>::type>
operator+(const A &a, const B &b)
{
return QStringBuilder<A, B>(a, b);
}
#endif
QT_END_NAMESPACE
QT_END_HEADER
#endif // QSTRINGBUILDER_H
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