| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the documentation of the Qt Toolkit. |
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| ** BSD License Usage |
| ** Alternatively, you may use this file under the terms of the BSD license |
| ** as follows: |
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| ****************************************************************************/ |
| |
| //! [0] |
| QProcess gzip; |
| gzip.start("gzip", QStringList() << "-c"); |
| if (!gzip.waitForStarted()) |
| return false; |
| |
| gzip.write("uncompressed data"); |
| |
| QByteArray compressed; |
| while (gzip.waitForReadyRead()) |
| compressed += gzip.readAll(); |
| //! [0] |
| |
| |
| //! [1] |
| qint64 CustomDevice::bytesAvailable() const |
| { |
| return buffer.size() + QIODevice::bytesAvailable(); |
| } |
| //! [1] |
| |
| |
| //! [2] |
| QFile file("box.txt"); |
| if (file.open(QFile::ReadOnly)) { |
| char buf[1024]; |
| qint64 lineLength = file.readLine(buf, sizeof(buf)); |
| if (lineLength != -1) { |
| // the line is available in buf |
| } |
| } |
| //! [2] |
| |
| |
| //! [3] |
| bool CustomDevice::canReadLine() const |
| { |
| return buffer.contains('\n') || QIODevice::canReadLine(); |
| } |
| //! [3] |
| |
| |
| //! [4] |
| bool isExeFile(QFile *file) |
| { |
| char buf[2]; |
| if (file->peek(buf, sizeof(buf)) == sizeof(buf)) |
| return (buf[0] == 'M' && buf[1] == 'Z'); |
| return false; |
| } |
| //! [4] |
| |
| |
| //! [5] |
| bool isExeFile(QFile *file) |
| { |
| return file->peek(2) == "MZ"; |
| } |
| //! [5] |