File indexing completed on 2024-06-23 05:14:19

 /* utils/windowsprocessdevice.h
     This file is part of Kleopatra, the KDE keymanager
     SPDX-FileCopyrightText: 2019 g 10code GmbH
 
     SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #if defined(WIN32) || defined(Q_MOC_RUN)
 #ifndef WINDOWSPROCESSDEVICE_H
 #define WINDOWSPROCESSDEVICE_H
 
 #include <memory>
 
 #include <QIODevice>
 
 class QString;
 #include <QStringList>
 
 namespace Kleo
 {
 /* Simplistic anonymous pipe io device
  *
  * Create an IODevice using Windows Create Process and pipes
  * this class serves as an alternative to use QProcess on
  * Windows which event driven nature does not play well
  * in our threading and IPC model.
  *
  * This class was written with gpgtar in mind and mostly
  * a reaction to multiple issues we had with QProcess
  * and gpgtar in GPGME on Windows. It was so hard to debug them
  * that we decided for a simple approach that gives us
  * full control.
  *
  * As there are use cases streaming terrabytes through this
  * even the control of the buffer size is an advantage.
  *
  **/
 class WindowsProcessDevice : public QIODevice
 {
     Q_OBJECT
 public:
     WindowsProcessDevice(const QString &path, const QStringList &args, const QString &wd);
 
     /* Starts the process. Only supports
        QIODevice::ReadOnly
        QIODevice::WriteOnly
        QIODevice::ReadWrite */
     bool open(OpenMode mode) override;
 
     /* Terminates the process */
     void close() override;
 
     bool isSequential() const override;
 
     /* Closes the write channel */
     void closeWriteChannel();
 
     /* Get the an error string either stderr or a windows error */
     QString errorString();
 
 protected:
     /* Blocking read */
     qint64 readData(char *data, qint64 maxSize) override;
     /* Blocking write */
     qint64 writeData(const char *data, qint64 size) override;
 
 private:
     Q_DISABLE_COPY(WindowsProcessDevice)
     class Private;
     std::shared_ptr<Private> d;
 };
 
 } // namespace Kleo
 
 #endif // WINDOWSPROCESSDEVICE_H
 #endif // WIN32