80 lines
2.2 KiB
C++
80 lines
2.2 KiB
C++
/*
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SPDX-FileCopyrightText: 2008-2010 Volker Lanz <vl@fidra.de>
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SPDX-FileCopyrightText: 2015 Teo Mrnjavac <teo@kde.org>
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SPDX-FileCopyrightText: 2016 Chantara Tith <tith.chantara@gmail.com>
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SPDX-FileCopyrightText: 2017-2018 Andrius Štikonas <andrius@stikonas.eu>
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SPDX-FileCopyrightText: 2018 Huzaifa Faruqui <huzaifafaruqui@gmail.com>
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SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#include "core/copysourcedevice.h"
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#include "backend/corebackend.h"
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#include "backend/corebackendmanager.h"
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#include "core/copytarget.h"
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#include "core/copytargetdevice.h"
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#include "core/device.h"
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/** Constructs a CopySource on the given Device
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@param d Device from which to copy
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@param firstbyte the first byte that will be copied
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@param lastbyte the last byte that will be copied
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*/
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CopySourceDevice::CopySourceDevice(Device& d, qint64 firstbyte, qint64 lastbyte) :
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CopySource(),
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m_Device(d),
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m_FirstByte(firstbyte),
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m_LastByte(lastbyte),
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m_BackendDevice(nullptr)
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{
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}
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/** Opens the Device
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@return true if the Device could be successfully opened
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*/
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bool CopySourceDevice::open()
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{
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m_BackendDevice = CoreBackendManager::self()->backend()->openDeviceExclusive(device());
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return m_BackendDevice != nullptr;
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}
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/** Returns the length of this CopySource
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@return length of the copy source
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*/
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qint64 CopySourceDevice::length() const
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{
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return lastByte() - firstByte() + 1;
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}
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/** Checks if this CopySourceDevice overlaps with the given CopyTarget
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@param target the CopyTarget to check overlapping with
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@return true if overlaps
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*/
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bool CopySourceDevice::overlaps(const CopyTarget& target) const
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{
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try {
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const CopyTargetDevice& t = dynamic_cast<const CopyTargetDevice&>(target);
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if (device().deviceNode() != t.device().deviceNode())
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return false;
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// overlapping at the front?
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if (firstByte() <= t.firstByte() && lastByte() >= t.firstByte())
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return true;
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// overlapping at the back?
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if (firstByte() <= t.lastByte() && lastByte() >= t.lastByte())
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return true;
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} catch (...) {
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}
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return false;
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}
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QString CopySourceDevice::path() const
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{
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return m_Device.deviceNode();
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}
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