/**************************************************************************** ** ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the QtCore 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 1.1, 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. ** ** If you have questions regarding the use of this file, please contact ** Nokia at qt-info@nokia.com. ** $QT_END_LICENSE$ ** ****************************************************************************/ #ifndef QSTRINGBUILDER_H #define QSTRINGBUILDER_H #include <QtCore/qstring.h> #if defined(Q_CC_GNU) && !defined(Q_CC_INTEL) # if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ == 0) # include <QtCore/qmap.h> # endif #endif #include <string.h> QT_BEGIN_HEADER QT_BEGIN_NAMESPACE QT_MODULE(Core) // ### Qt 5: merge with QLatin1String class QLatin1Literal { public: int size() const { return m_size; } const char *data() const { return m_data; } template <int N> QLatin1Literal(const char (&str)[N]) : m_size(N - 1), m_data(str) {} private: const int m_size; const char *m_data; }; struct Q_CORE_EXPORT QAbstractConcatenable { protected: static void convertFromAscii(const char *a, int len, QChar *&out); static inline void convertFromAscii(char a, QChar *&out) { #ifndef QT_NO_TEXTCODEC if (QString::codecForCStrings) *out++ = QChar::fromAscii(a); else #endif *out++ = QLatin1Char(a); } }; template <typename T> struct 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), Qt::Uninitialized); QChar *d = s.data(); QConcatenable< QStringBuilder<A, B> >::appendTo(*this, d); // this resize is necessary since we allocate a bit too much // when dealing with variable sized 8-bit encodings s.resize(d - s.data()); return s; } QByteArray toLatin1() const { return QString(*this).toLatin1(); } const A &a; const B &b; }; template <> struct QConcatenable<char> : private QAbstractConcatenable { typedef char type; static int size(const char) { return 1; } static inline void appendTo(const char c, QChar *&out) { QAbstractConcatenable::convertFromAscii(c, out); } }; 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<QCharRef> { typedef QCharRef type; static int size(const QCharRef &) { return 1; } static inline void appendTo(const QCharRef &c, QChar *&out) { *out++ = QChar(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, reinterpret_cast<const 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, reinterpret_cast<const char*>(a.constData()), sizeof(QChar) * n); out += n; } }; #ifndef QT_NO_CAST_FROM_ASCII template <int N> struct QConcatenable<char[N]> : private QAbstractConcatenable { typedef char type[N]; static int size(const char[N]) { return N - 1; } static inline void appendTo(const char a[N], QChar *&out) { QAbstractConcatenable::convertFromAscii(a, N, out); } }; template <int N> struct QConcatenable<const char[N]> : private QAbstractConcatenable { typedef const char type[N]; static int size(const char[N]) { return N - 1; } static inline void appendTo(const char a[N], QChar *&out) { QAbstractConcatenable::convertFromAscii(a, N, out); } }; template <> struct QConcatenable<const char *> : private QAbstractConcatenable { typedef char const *type; static int size(const char *a) { return qstrlen(a); } static inline void appendTo(const char *a, QChar *&out) { QAbstractConcatenable::convertFromAscii(a, -1, out); } }; template <> struct QConcatenable<QByteArray> : private QAbstractConcatenable { typedef QByteArray type; static int size(const QByteArray &ba) { return qstrnlen(ba.constData(), ba.size()); } static inline void appendTo(const QByteArray &ba, QChar *&out) { QAbstractConcatenable::convertFromAscii(ba.constData(), -1, out); } }; #endif 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<typename QConcatenable<A>::type, typename QConcatenable<B>::type>(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<typename QConcatenable<A>::type, typename QConcatenable<B>::type>(a, b); } #endif QT_END_NAMESPACE QT_END_HEADER #endif // QSTRINGBUILDER_H