vasilito
cf12defd28
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
74 lines
1.7 KiB
C++
74 lines
1.7 KiB
C++
/* This file is part of the KDE libraries
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SPDX-FileCopyrightText: 2001, 2002, 2007 David Faure <faure@kde.org>
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SPDX-License-Identifier: LGPL-2.0-or-later
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*/
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#include "klimitediodevice_p.h"
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#include "loggingcategory.h"
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KLimitedIODevice::KLimitedIODevice(QIODevice *dev, qint64 start, qint64 length)
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: m_dev(dev)
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, m_start(start)
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, m_length(length)
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{
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// qCDebug(KArchiveLog) << "start=" << start << "length=" << length;
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open(QIODevice::ReadOnly); // krazy:exclude=syscalls
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}
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bool KLimitedIODevice::open(QIODevice::OpenMode m)
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{
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// qCDebug(KArchiveLog) << "m=" << m;
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if (m & QIODevice::ReadOnly) {
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/*bool ok = false;
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if ( m_dev->isOpen() )
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ok = ( m_dev->mode() == QIODevice::ReadOnly );
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else
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ok = m_dev->open( m );
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if ( ok )*/
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m_dev->seek(m_start); // No concurrent access !
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} else {
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// qCWarning(KArchiveLog) << "KLimitedIODevice::open only supports QIODevice::ReadOnly!";
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}
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setOpenMode(QIODevice::ReadOnly);
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return true;
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}
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void KLimitedIODevice::close()
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{
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}
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qint64 KLimitedIODevice::size() const
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{
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return m_length;
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}
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qint64 KLimitedIODevice::readData(char *data, qint64 maxlen)
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{
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maxlen = qMin(maxlen, m_length - pos()); // Apply upper limit
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return m_dev->read(data, maxlen);
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}
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bool KLimitedIODevice::seek(qint64 pos)
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{
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Q_ASSERT(pos <= m_length);
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pos = qMin(pos, m_length); // Apply upper limit
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bool ret = m_dev->seek(m_start + pos);
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if (ret) {
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QIODevice::seek(pos);
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}
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return ret;
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}
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qint64 KLimitedIODevice::bytesAvailable() const
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{
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return QIODevice::bytesAvailable();
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}
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bool KLimitedIODevice::isSequential() const
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{
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return m_dev->isSequential();
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}
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#include "moc_klimitediodevice_p.cpp"
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