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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2011 Tatsuhiro Tsujikawa
*
* 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) any later version.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#include "SocketRecvBuffer.h"
#include <cstring>
#include <cassert>
#include "SocketCore.h"
#include "LogFactory.h"
namespace aria2 {
SocketRecvBuffer::SocketRecvBuffer(std::shared_ptr<SocketCore> socket)
: socket_(std::move(socket)), pos_(buf_.data()), last_(pos_)
{
}
SocketRecvBuffer::~SocketRecvBuffer() {}
ssize_t SocketRecvBuffer::recv()
{
size_t n = std::end(buf_) - last_;
if (n == 0) {
A2_LOG_DEBUG("Buffer full");
return 0;
}
socket_->readData(last_, n);
last_ += n;
return n;
}
void SocketRecvBuffer::drain(size_t n)
{
assert(pos_ + n <= last_);
pos_ += n;
if (pos_ == last_) {
truncateBuffer();
}
}
void SocketRecvBuffer::truncateBuffer() { pos_ = last_ = buf_.data(); }
} // namespace aria2
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