kdeconnect-kde/core/backends/bluetooth/multiplexchannel.cpp

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2019-01-20 11:23:50 +00:00
/**
* Copyright 2019 Matthijs Tijink <matthijstijink@gmail.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License or (at your option) version 3 or any later version
* accepted by the membership of KDE e.V. (or its successor approved
* by the membership of KDE e.V.), which shall act as a proxy
* defined in Section 14 of version 3 of the license.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "multiplexchannel.h"
#include "multiplexchannelstate.h"
#include "core_debug.h"
MultiplexChannel::MultiplexChannel(QSharedPointer<MultiplexChannelState> state) : state{state} {
QIODevice::open(QIODevice::ReadWrite);
connect(this, &QIODevice::aboutToClose, state.data(), &MultiplexChannelState::requestClose);
connect(state.data(), &MultiplexChannelState::readyRead, this, &QIODevice::readyRead);
connect(state.data(), &MultiplexChannelState::bytesWritten, this, &QIODevice::bytesWritten);
connect(state.data(), &MultiplexChannelState::disconnected, this, &MultiplexChannel::disconnect);
}
MultiplexChannel::~MultiplexChannel() {}
bool MultiplexChannel::atEnd() const {
return !isOpen() || (!state->connected && state->read_buffer.isEmpty());
}
void MultiplexChannel::disconnect() {
state->connected = false;
setOpenMode(QIODevice::ReadOnly);
Q_EMIT state->readyRead();
Q_EMIT state->requestClose();
if (state->read_buffer.isEmpty()) {
close();
}
}
qint64 MultiplexChannel::bytesAvailable() const {
return state->read_buffer.size() + QIODevice::bytesAvailable();
}
qint64 MultiplexChannel::bytesToWrite() const {
return state->write_buffer.size() + QIODevice::bytesToWrite();
}
qint64 MultiplexChannel::readData(char* data, qint64 maxlen) {
if (maxlen <= state->read_buffer.size()) {
for (int i = 0; i < maxlen; ++i) {
data[i] = state->read_buffer[i];
}
state->read_buffer.remove(0, maxlen);
Q_EMIT state->readAvailable();
if (!state->connected && state->read_buffer.isEmpty()) {
close();
}
return maxlen;
} else if (state->read_buffer.size() > 0) {
auto num_to_read = state->read_buffer.size();
for (int i = 0; i < num_to_read; ++i) {
data[i] = state->read_buffer[i];
}
state->read_buffer.remove(0, num_to_read);
Q_EMIT state->readAvailable();
if (!state->connected && state->read_buffer.isEmpty()) {
close();
}
return num_to_read;
} else if (isOpen() && state->connected) {
if (state->requestedReadAmount < BUFFER_SIZE) {
Q_EMIT state->readAvailable();
}
return 0;
} else {
close();
return -1;
}
}
qint64 MultiplexChannel::writeData(const char* data, qint64 len) {
state->write_buffer.append(data, len);
Q_EMIT state->writeAvailable();
return len;
}
bool MultiplexChannel::canReadLine() const {
return isReadable() && (QIODevice::canReadLine() || state->read_buffer.contains('\n'));
}
bool MultiplexChannel::isSequential() const {
return true;
}