/*
 *   Copyright (C) 2015 by Jonathan Naylor G4KLX
 *
 *   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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "DStarEcho.h"

CDStarEcho::CDStarEcho(unsigned int delay, unsigned int space) :
m_buffer(space),
m_timer(1000U, delay)
{
}

CDStarEcho::~CDStarEcho()
{
}

unsigned int CDStarEcho::readData(unsigned char* data)
{
	if (!hasData())
		return 0U;

	unsigned char len;
	m_buffer.getData(&len, 1U);

	m_buffer.getData(data, len);

	if (!hasData())
		m_timer.stop();

	return len;
}

bool CDStarEcho::writeData(const unsigned char* data, unsigned int length)
{
	bool ret = m_buffer.hasSpace(length + 1U);
	if (!ret)
		return false;

	unsigned char len = length;
	m_buffer.addData(&len, 1U);

	m_buffer.addData(data, length);

	m_timer.start();

	return true;
}

bool CDStarEcho::hasData()
{
	if (m_timer.isRunning() && m_timer.hasExpired())
		return m_buffer.hasData();
	else
		return false;
}

void CDStarEcho::clock(unsigned int ms)
{
	m_timer.clock(ms);
}