/***************************************************************************
                          messagebuffer.cpp  -  Raw message containing type and data
                             -------------------
    begin                : Thu Dec 5 2002
    copyright            : (C) 2002 by bones
    email                : boesemar@users.sourceforge.net

 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/


/*
   ---
   header
   -----
   Uint8 type id
   Uint8 Acknowledge flag
   Uint16 counter

   ----
   data
   ----
   var length


   header + data = buffer

*/

#include "messagebuffer.h"


CMessageBuffer::CMessageBuffer()
{
	s_msg_header h;
	h.ac = 0;
	setHeader(h);
}

CMessageBuffer::~CMessageBuffer()
{
}

bool CMessageBuffer::setType(const eMessageType t)
{
	s_msg_header m = getHeader();
	m.tid = (Uint8) t;
	return setHeader(m);
}

bool CMessageBuffer::setAC(const Uint8 acflag)
{
	s_msg_header m = getHeader();
	m.ac = (Uint8) acflag;
	return setHeader(m);
}

bool CMessageBuffer::setCounter(const Uint16 counter)
{
	s_msg_header m = getHeader();
	m.counter =  counter;
	return setHeader(m);
}


bool CMessageBuffer::setData(const CBinBuffer & b)
{
	resize(b.size() + getHeaderLength());
	for (unsigned int i=0;i<b.size();i++)
		(*this)[getHeaderLength()+i] = b[i];

	return (true);
}

CBinBuffer CMessageBuffer::getData() const
{
	return substr(this->getHeaderLength());
}


CMessageBuffer::s_msg_header CMessageBuffer::getHeader() const
{
	s_msg_header res;
	res.ac = 255;
	if (size() < sizeof(s_msg_header)) return res;
	unsigned int pos = 0;
	res.tid = getUint8(pos);
	res.ac = getUint8(pos);
	res.counter = getUint16(pos);
	return res;
}

CMessageBuffer::eMessageType CMessageBuffer::getType() const
{
	s_msg_header m = getHeader();
	if (m.ac == 255) return badMessage;
	return ((CMessageBuffer::eMessageType) m.tid);
}

Uint8 CMessageBuffer::getAC() const
{
	s_msg_header m = getHeader();
	if (m.ac == 255) return badMessage;
	return m.ac;
}

Uint16 CMessageBuffer::getCounter() const
{
	s_msg_header m = getHeader();
	if (m.ac == 255) return badMessage;
	return m.counter;
}



bool CMessageBuffer::setHeader(s_msg_header & h)
{
	CBinBuffer tmp;
	tmp.empty();
	tmp+=h.tid;
	tmp+=h.ac;
	tmp+=h.counter;
	if (size() < tmp.size()) resize(tmp.size());
	for (unsigned int i=0;i<tmp.size();i++)
		(*this)[i] = tmp[i];

	return true;
}


bool CMessageBuffer::setBuffer(const CBinBuffer & b)
{
	if (size() < b.size())
		resize(b.size());

	for (unsigned int i=0;i<b.size();i++)
		(*this)[i] = b[i];

	return true;
}

CBinBuffer CMessageBuffer::getBuffer()
{
	return (*this);
}

CMessageBuffer::CMessageBuffer(const CMessageBuffer::eMessageType & t)
{
	s_msg_header h;
	h.tid = (Uint8) t;
	setHeader(h);
}


int CMessageBuffer::getHeaderLength() const
{
	return sizeof(s_msg_header);
}