/*
Copyright_License {

  XCSoar Glide Computer - http://www.xcsoar.org/
  Copyright (C) 2000-2013 The XCSoar Project
  A detailed list of copyright holders can be found in the file "AUTHORS".

  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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
}
*/

#include "Device/Internal.hpp"

#include "Port/Port.hpp"
#include "NMEA/Checksum.hpp"

#include <assert.h>
#include <stdio.h>
#include <string.h>

bool
PortWriteNMEA(Port &port, const char *line, OperationEnvironment &env)
{
  assert(line != NULL);

  /* reasonable hard-coded timeout; do we need to make this a
     parameter? */
  const unsigned timeout_ms = 1000;

  if (!port.Write('$') ||
      !port.FullWrite(line, strlen(line), env, timeout_ms))
    return false;

  char checksum[16];
  sprintf(checksum, "*%02X\r\n", NMEAChecksum(line));
  return port.FullWrite(checksum, strlen(checksum), env, timeout_ms);
}
