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/****************************************************************************
**
** Copyright (C) 2020 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#if 0
// keep existing syncqt header working after the move of the class
// into qstringconverter_base
#pragma qt_class(QStringConverter)
#pragma qt_class(QStringConverterBase)
#endif
#ifndef QSTRINGCONVERTER_H
#define QSTRINGCONVERTER_H
#include <QtCore/qstringconverter_base.h>
#include <QtCore/qstring.h>
#if defined(QT_USE_FAST_OPERATOR_PLUS) || defined(QT_USE_QSTRINGBUILDER)
#include <QtCore/qstringbuilder.h>
#endif
QT_BEGIN_NAMESPACE
class QStringEncoder : public QStringConverter
{
protected:
constexpr explicit QStringEncoder(const Interface *i) noexcept
: QStringConverter(i)
{}
public:
constexpr QStringEncoder() noexcept
: QStringConverter()
{}
constexpr explicit QStringEncoder(Encoding encoding, Flags flags = Flag::Default)
: QStringConverter(encoding, flags)
{}
explicit QStringEncoder(const char *name, Flags flags = Flag::Default) noexcept
: QStringConverter(name, flags)
{}
#if defined(Q_QDOC)
QByteArray operator()(const QString &in);
QByteArray operator()(QStringView in);
QByteArray encode(const QString &in);
QByteArray encode(QStringView in);
#else
template<typename T>
struct DecodedData
{
QStringEncoder *encoder;
T data;
operator QByteArray() const { return encoder->encodeAsByteArray(data); }
};
Q_WEAK_OVERLOAD
DecodedData<const QString &> operator()(const QString &str)
{ return DecodedData<const QString &>{this, str}; }
DecodedData<QStringView> operator()(QStringView in)
{ return DecodedData<QStringView>{this, in}; }
Q_WEAK_OVERLOAD
DecodedData<const QString &> encode(const QString &str)
{ return DecodedData<const QString &>{this, str}; }
DecodedData<QStringView> encode(QStringView in)
{ return DecodedData<QStringView>{this, in}; }
#endif
qsizetype requiredSpace(qsizetype inputLength) const
{ return iface->fromUtf16Len(inputLength); }
char *appendToBuffer(char *out, QStringView in)
{ return iface->fromUtf16(out, in, &state); }
private:
QByteArray encodeAsByteArray(QStringView in)
{
QByteArray result(iface->fromUtf16Len(in.size()), Qt::Uninitialized);
char *out = result.data();
out = iface->fromUtf16(out, in, &state);
result.truncate(out - result.constData());
return result;
}
};
class QStringDecoder : public QStringConverter
{
protected:
constexpr explicit QStringDecoder(const Interface *i) noexcept
: QStringConverter(i)
{}
public:
constexpr explicit QStringDecoder(Encoding encoding, Flags flags = Flag::Default)
: QStringConverter(encoding, flags)
{}
constexpr QStringDecoder() noexcept
: QStringConverter()
{}
explicit QStringDecoder(const char *name, Flags f = Flag::Default) noexcept
: QStringConverter(name, f)
{}
#if defined(Q_QDOC)
QString operator()(const QByteArray &ba);
QString operator()(QByteArrayView ba);
QString decode(const QByteArray &ba);
QString decode(QByteArrayView ba);
#else
template<typename T>
struct EncodedData
{
QStringDecoder *decoder;
T data;
operator QString() const { return decoder->decodeAsString(data); }
};
Q_WEAK_OVERLOAD
EncodedData<const QByteArray &> operator()(const QByteArray &ba)
{ return EncodedData<const QByteArray &>{this, ba}; }
EncodedData<QByteArrayView> operator()(QByteArrayView ba)
{ return EncodedData<QByteArrayView>{this, ba}; }
Q_WEAK_OVERLOAD
EncodedData<const QByteArray &> decode(const QByteArray &ba)
{ return EncodedData<const QByteArray &>{this, ba}; }
EncodedData<QByteArrayView> decode(QByteArrayView ba)
{ return EncodedData<QByteArrayView>{this, ba}; }
#endif
qsizetype requiredSpace(qsizetype inputLength) const
{ return iface->toUtf16Len(inputLength); }
QChar *appendToBuffer(QChar *out, QByteArrayView ba)
{ return iface->toUtf16(out, ba, &state); }
private:
QString decodeAsString(QByteArrayView in)
{
QString result(iface->toUtf16Len(in.size()), Qt::Uninitialized);
const QChar *out = iface->toUtf16(result.data(), in, &state);
result.truncate(out - result.constData());
return result;
}
};
#if defined(QT_USE_FAST_OPERATOR_PLUS) || defined(QT_USE_QSTRINGBUILDER)
template <typename T>
struct QConcatenable<QStringDecoder::EncodedData<T>>
: private QAbstractConcatenable
{
typedef QChar type;
typedef QString ConvertTo;
enum { ExactSize = false };
static qsizetype size(const QStringDecoder::EncodedData<T> &s) { return s.decoder->requiredSpace(s.data.size()); }
static inline void appendTo(const QStringDecoder::EncodedData<T> &s, QChar *&out)
{
out = s.decoder->appendToBuffer(out, s.data);
}
};
template <typename T>
struct QConcatenable<QStringEncoder::DecodedData<T>>
: private QAbstractConcatenable
{
typedef char type;
typedef QByteArray ConvertTo;
enum { ExactSize = false };
static qsizetype size(const QStringEncoder::DecodedData<T> &s) { return s.encoder->requiredSpace(s.data.size()); }
static inline void appendTo(const QStringEncoder::DecodedData<T> &s, char *&out)
{
out = s.encoder->appendToBuffer(out, s.data);
}
};
template <typename T>
QString &operator+=(QString &a, const QStringDecoder::EncodedData<T> &b)
{
qsizetype len = a.size() + QConcatenable<QStringDecoder::EncodedData<T>>::size(b);
a.reserve(len);
QChar *it = a.data() + a.size();
QConcatenable<QStringDecoder::EncodedData<T>>::appendTo(b, it);
a.resize(qsizetype(it - a.constData())); //may be smaller than len
return a;
}
template <typename T>
QByteArray &operator+=(QByteArray &a, const QStringEncoder::DecodedData<T> &b)
{
qsizetype len = a.size() + QConcatenable<QStringEncoder::DecodedData<T>>::size(b);
a.reserve(len);
char *it = a.data() + a.size();
QConcatenable<QStringEncoder::DecodedData<T>>::appendTo(b, it);
a.resize(qsizetype(it - a.constData())); //may be smaller than len
return a;
}
#endif
QT_END_NAMESPACE
#endif
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