diff options
Diffstat (limited to 'sources/pyside6/PySide6/QtCore/glue/qiopipe.cpp')
-rw-r--r-- | sources/pyside6/PySide6/QtCore/glue/qiopipe.cpp | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/sources/pyside6/PySide6/QtCore/glue/qiopipe.cpp b/sources/pyside6/PySide6/QtCore/glue/qiopipe.cpp new file mode 100644 index 000000000..6799c0f32 --- /dev/null +++ b/sources/pyside6/PySide6/QtCore/glue/qiopipe.cpp @@ -0,0 +1,142 @@ +// Copyright (C) 2024 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only + +#include "qiopipe.h" + +#include <QtCore/private/qobject_p.h> +#include <QtCore/qdebug.h> +#include <QtCore/qiodevice.h> +#include <QtCore/qpointer.h> + +#include <memory> + +QT_BEGIN_NAMESPACE + +namespace QtCoreHelper +{ + +class QPipeEndPoint : public QIODevice +{ + Q_OBJECT + +public: + bool isSequential() const override; + qint64 bytesAvailable() const override; + + void setRemoteEndPoint(QPipeEndPoint *other); + +protected: + qint64 readData(char *data, qint64 maxlen) override; + qint64 writeData(const char *data, qint64 len) override; + +private: + QByteArray m_buffer; + QPointer<QPipeEndPoint> m_remoteEndPoint; +}; + +class QIOPipePrivate final : public QObjectPrivate +{ + Q_DECLARE_PUBLIC(QIOPipe) +public: + QIOPipePrivate(); + ~QIOPipePrivate() {}; + + std::unique_ptr<QPipeEndPoint> end1; + std::unique_ptr<QPipeEndPoint> end2; +}; + +QIOPipe::QIOPipe(QObject *parent) : QObject(*(new QIOPipePrivate()), parent) { } + +bool QIOPipe::open(QIODevice::OpenMode mode) +{ + Q_D(QIOPipe); + + if (!d->end1->open(mode)) + return false; + switch (mode & QIODevice::ReadWrite) { + case QIODevice::WriteOnly: + case QIODevice::ReadOnly: + return d->end2->open(mode ^ QIODevice::ReadWrite); + default: + return d->end2->open(mode); + } +} + +QIODevice *QIOPipe::end1() const +{ + Q_D(const QIOPipe); + return d->end1.get(); +} + +QIODevice *QIOPipe::end2() const +{ + Q_D(const QIOPipe); + return d->end2.get(); +} + +QIOPipePrivate::QIOPipePrivate() : end1(std::make_unique<QPipeEndPoint>()), + end2(std::make_unique<QPipeEndPoint>()) +{ + end1->setRemoteEndPoint(end2.get()); + end2->setRemoteEndPoint(end1.get()); +} + +bool QPipeEndPoint::isSequential() const +{ + return true; +} + +qint64 QPipeEndPoint::bytesAvailable() const +{ + return m_buffer.size() + QIODevice::bytesAvailable(); +} + +void QPipeEndPoint::setRemoteEndPoint(QPipeEndPoint *other) +{ + m_remoteEndPoint = other; +} + +qint64 QPipeEndPoint::readData(char *data, qint64 maxlen) +{ + maxlen = qMin(maxlen, static_cast<qint64>(m_buffer.size())); + if (maxlen <= 0) + return 0; + + Q_ASSERT(maxlen > 0); + memcpy(data, m_buffer.data(), static_cast<size_t>(maxlen)); + m_buffer = m_buffer.mid(maxlen); + return maxlen; +} + +qint64 QPipeEndPoint::writeData(const char *data, qint64 len) +{ + if (!m_remoteEndPoint) + return -1; + + if (len <= 0) + return 0; + + QByteArray &buffer = m_remoteEndPoint->m_buffer; + const qint64 prevLen = buffer.size(); + Q_ASSERT(prevLen >= 0); + len = qMin(len, std::numeric_limits<int>::max() - prevLen); + + if (len == 0) + return 0; + + Q_ASSERT(len > 0); + Q_ASSERT(prevLen + len > 0); + Q_ASSERT(prevLen + len <= std::numeric_limits<int>::max()); + + buffer.resize(prevLen + len); + memcpy(buffer.data() + prevLen, data, static_cast<size_t>(len)); + Q_EMIT bytesWritten(len); + Q_EMIT m_remoteEndPoint->readyRead(); + return len; +} + +} // namespace QtCoreHelper + +QT_END_NAMESPACE + +#include "qiopipe.moc" |