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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
//! [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]
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