/* <!-- copyright */
/*
 * aria2 - The high speed download utility
 *
 * Copyright (C) 2006 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 "SocketBuffer.h"

#include <cassert>

#include "SocketCore.h"
#include "DlAbortEx.h"
#include "message.h"
#include "StringFormat.h"

namespace aria2 {

SocketBuffer::SocketBuffer(const SharedHandle<SocketCore>& socket):
  _socket(socket) {}

SocketBuffer::~SocketBuffer() {}

void SocketBuffer::feedSendBuffer(const std::string& data)
{
  _sendbuf += data;
}

ssize_t SocketBuffer::feedAndSend(const std::string& data)
{
  feedSendBuffer(data);
  return send();
}

ssize_t SocketBuffer::send()
{
  if(_sendbuf.empty()) {
    return 0;
  }
  ssize_t len = _socket->writeData(_sendbuf.c_str(),
                                   _sendbuf.size());
  if(len == 0 && !_socket->wantRead() && !_socket->wantWrite()) {
    throw DL_ABORT_EX(StringFormat(EX_SOCKET_SEND, "Connection closed.").str());
  }
  _sendbuf.erase(0, len);
  return len;
}

bool SocketBuffer::sendBufferIsEmpty() const
{
  return _sendbuf.empty();
}

} // namespace aria2