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288 lines
8.1 KiB
288 lines
8.1 KiB
/****************************************************************************
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**
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** Copyright (C) 2010 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 QtCore module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial Usage
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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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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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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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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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QSTRINGBUILDER_H
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#define QSTRINGBUILDER_H
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#include <QtCore/qstring.h>
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#if defined(Q_CC_GNU) && !defined(Q_CC_INTEL)
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# if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ == 0)
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# include <QtCore/qmap.h>
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# endif
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#endif
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#include <string.h>
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QT_BEGIN_HEADER
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QT_BEGIN_NAMESPACE
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QT_MODULE(Core)
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// ### Qt 5: merge with QLatin1String
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class QLatin1Literal
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{
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public:
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int size() const { return m_size; }
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const char *data() const { return m_data; }
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template <int N>
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QLatin1Literal(const char (&str)[N])
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: m_size(N - 1), m_data(str) {}
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private:
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const int m_size;
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const char *m_data;
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};
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struct Q_CORE_EXPORT QAbstractConcatenable
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{
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protected:
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static void convertFromAscii(const char *a, int len, QChar *&out);
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static inline void convertFromAscii(char a, QChar *&out)
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{
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#ifndef QT_NO_TEXTCODEC
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if (QString::codecForCStrings)
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*out++ = QChar::fromAscii(a);
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else
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#endif
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*out++ = QLatin1Char(a);
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}
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};
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template <typename T> struct QConcatenable {};
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template <typename A, typename B>
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class QStringBuilder
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{
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public:
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QStringBuilder(const A &a_, const B &b_) : a(a_), b(b_) {}
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operator QString() const
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{
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QString s(QConcatenable< QStringBuilder<A, B> >::size(*this),
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Qt::Uninitialized);
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QChar *d = s.data();
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QConcatenable< QStringBuilder<A, B> >::appendTo(*this, d);
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// this resize is necessary since we allocate a bit too much
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// when dealing with variable sized 8-bit encodings
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s.resize(d - s.data());
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return s;
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}
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QByteArray toLatin1() const { return QString(*this).toLatin1(); }
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const A &a;
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const B &b;
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};
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template <> struct QConcatenable<char> : private QAbstractConcatenable
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{
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typedef char type;
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static int size(const char) { return 1; }
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static inline void appendTo(const char c, QChar *&out)
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{
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QAbstractConcatenable::convertFromAscii(c, out);
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}
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};
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template <> struct QConcatenable<QLatin1Char>
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{
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typedef QLatin1Char type;
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static int size(const QLatin1Char) { return 1; }
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static inline void appendTo(const QLatin1Char c, QChar *&out)
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{
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*out++ = c;
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}
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};
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template <> struct QConcatenable<QChar>
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{
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typedef QChar type;
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static int size(const QChar) { return 1; }
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static inline void appendTo(const QChar c, QChar *&out)
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{
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*out++ = c;
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}
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};
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template <> struct QConcatenable<QCharRef>
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{
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typedef QCharRef type;
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static int size(const QCharRef &) { return 1; }
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static inline void appendTo(const QCharRef &c, QChar *&out)
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{
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*out++ = QChar(c);
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}
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};
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template <> struct QConcatenable<QLatin1String>
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{
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typedef QLatin1String type;
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static int size(const QLatin1String &a) { return qstrlen(a.latin1()); }
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static inline void appendTo(const QLatin1String &a, QChar *&out)
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{
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for (const char *s = a.latin1(); *s; )
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*out++ = QLatin1Char(*s++);
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}
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};
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template <> struct QConcatenable<QLatin1Literal>
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{
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typedef QLatin1Literal type;
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static int size(const QLatin1Literal &a) { return a.size(); }
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static inline void appendTo(const QLatin1Literal &a, QChar *&out)
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{
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for (const char *s = a.data(); *s; )
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*out++ = QLatin1Char(*s++);
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}
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};
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template <> struct QConcatenable<QString>
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{
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typedef QString type;
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static int size(const QString &a) { return a.size(); }
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static inline void appendTo(const QString &a, QChar *&out)
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{
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const int n = a.size();
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memcpy(out, reinterpret_cast<const char*>(a.constData()), sizeof(QChar) * n);
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out += n;
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}
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};
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template <> struct QConcatenable<QStringRef>
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{
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typedef QStringRef type;
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static int size(const QStringRef &a) { return a.size(); }
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static inline void appendTo(QStringRef a, QChar *&out)
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{
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const int n = a.size();
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memcpy(out, reinterpret_cast<const char*>(a.constData()), sizeof(QChar) * n);
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out += n;
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}
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};
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#ifndef QT_NO_CAST_FROM_ASCII
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template <int N> struct QConcatenable<char[N]> : private QAbstractConcatenable
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{
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typedef char type[N];
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static int size(const char[N])
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{
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return N - 1;
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}
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static inline void appendTo(const char a[N], QChar *&out)
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{
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QAbstractConcatenable::convertFromAscii(a, N, out);
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}
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};
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template <int N> struct QConcatenable<const char[N]> : private QAbstractConcatenable
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{
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typedef const char type[N];
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static int size(const char[N]) { return N - 1; }
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static inline void appendTo(const char a[N], QChar *&out)
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{
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QAbstractConcatenable::convertFromAscii(a, N, out);
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}
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};
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template <> struct QConcatenable<const char *> : private QAbstractConcatenable
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{
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typedef char const *type;
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static int size(const char *a) { return qstrlen(a); }
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static inline void appendTo(const char *a, QChar *&out)
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{
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QAbstractConcatenable::convertFromAscii(a, -1, out);
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}
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};
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template <> struct QConcatenable<QByteArray> : private QAbstractConcatenable
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{
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typedef QByteArray type;
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static int size(const QByteArray &ba) { return qstrnlen(ba.constData(), ba.size()); }
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static inline void appendTo(const QByteArray &ba, QChar *&out)
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{
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QAbstractConcatenable::convertFromAscii(ba.constData(), -1, out);
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}
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};
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#endif
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template <typename A, typename B>
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struct QConcatenable< QStringBuilder<A, B> >
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{
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typedef QStringBuilder<A, B> type;
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static int size(const type &p)
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{
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return QConcatenable<A>::size(p.a) + QConcatenable<B>::size(p.b);
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}
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static inline void appendTo(const QStringBuilder<A, B> &p, QChar *&out)
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{
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QConcatenable<A>::appendTo(p.a, out);
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QConcatenable<B>::appendTo(p.b, out);
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}
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};
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template <typename A, typename B>
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QStringBuilder<typename QConcatenable<A>::type, typename QConcatenable<B>::type>
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operator%(const A &a, const B &b)
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{
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return QStringBuilder<typename QConcatenable<A>::type, typename QConcatenable<B>::type>(a, b);
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}
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#ifdef QT_USE_FAST_OPERATOR_PLUS
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template <typename A, typename B>
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QStringBuilder<typename QConcatenable<A>::type, typename QConcatenable<B>::type>
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operator+(const A &a, const B &b)
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{
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return QStringBuilder<typename QConcatenable<A>::type, typename QConcatenable<B>::type>(a, b);
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}
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#endif
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QT_END_NAMESPACE
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QT_END_HEADER
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#endif // QSTRINGBUILDER_H
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