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39 
40 #ifndef QIOPIPE_P_H
41 #define QIOPIPE_P_H
42 
43 //
44 //  W A R N I N G
45 //  -------------
46 //
47 // This file is not part of the Qt API.  It exists purely as an
48 // implementation detail.  This header file may change from version to
49 // version without notice, or even be removed.
50 //
51 // We mean it.
52 //
53 
54 #include <QtCore/qiodevice.h>
55 #include <QtCore/qbytearray.h>
56 #include <QtCore/private/qiodevice_p.h>
57 
58 QT_BEGIN_NAMESPACE
59 
60 class QObject;
61 class QIOPipePrivate;
62 
63 class QIOPipe : public QIODevice
64 {
65     Q_OBJECT
66 
67 public:
68     enum Mode {
69         EndPipe = 0x0000,
70         ProxyPipe = 0x0001
71     };
72 
73      explicit QIOPipe(QIODevice *parent, Mode mode = EndPipe);
74     ~QIOPipe() override;
75 
76     bool open(OpenMode openMode) override;
77     bool isSequential() const override;
78     void setReadChannelCount(int count);
79     void addChildPipe(QIOPipe *childPipe);
80 
81 protected:
82     qint64 readData(char *data, qint64 maxlen) override;
83     qint64 writeData(const char *data, qint64 len) override;
84 
85 private:
86     Q_DECLARE_PRIVATE(QIOPipe)
87     Q_DISABLE_COPY(QIOPipe)
88 };
89 
90 class QIOPipePrivate : public QIODevicePrivate
91 {
92     Q_DECLARE_PUBLIC(QIOPipe)
93 
94 public:
95     explicit QIOPipePrivate(QIODevice *iodevice, bool proxying);
96     ~QIOPipePrivate() override;
97 
98     void initialize();
99     bool readAvailableData();
100     void pumpData(const QByteArray &ba);
101     void pushData(const QByteArray &ba);
102     void _q_onReadyRead();
103     void addChildPipe(QIOPipe *childPipe);
104     void removeChildPipe(QIOPipe *childPipe);
105 
106     bool m_proxying = false;
107     QPointer<QIODevice> source;
108     QVector<QPointer<QIOPipe>> childPipes;
109 };
110 
111 #endif // QIOPIPE_P_H
112 
113 QT_END_NAMESPACE
114