/*
Copyright (C) 1998 Pyrosoft Inc. (www.pyrosoftgames.com), Matthew Bogue
 
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 <config.h>

#include "UnitOpcodeDecoder.hpp"
#include "Util/Log.hpp"

UnitOpcodeDecoder::UnitOpcodeDecoder()
{
    memset(&opcode_message, 0, sizeof(opcode_message));
    reset();
}

UnitOpcodeDecoder::~UnitOpcodeDecoder()
{
}

void
UnitOpcodeDecoder::reset()
{
    opcode_index = 0;
}

void
UnitOpcodeDecoder::setMessage(const NetMessage* message)
{
    if(message->getSize() > sizeof(opcode_message)) {
        LOGGER.warning("Opcodemessage too big.");
        memset(&opcode_message, 0, sizeof(opcode_message));
        reset();
        return;
    }

    memcpy(&opcode_message, message, message->getSize());
    reset();
}

bool
UnitOpcodeDecoder::decode(UnitOpcode** opcode)
{
    if(opcode_index + opcode_message.getHeaderSize() >=
            opcode_message.getSize())
        return false;
    
    *opcode = (UnitOpcode*) (opcode_message.data + opcode_index);
    opcode_index += UnitOpcode::getSize();
    return true;
}