/*
   Copyright (C) 2004 T. Scott Dattalo

This file is part of gpsim.

gpsim 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, or (at your option)
any later version.

gpsim 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 gpasm; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

#include "../config.h"
#include "xref.h"
#include "gpsim_interface.h"
#include "value.h"

//-------------------------------------------------------------------
XrefObject::XrefObject()
{
    data=0;
}
XrefObject::XrefObject(gpsimValue *value)
{
    data=value;
}

XrefObject::~XrefObject()
{
    list<void*>::iterator ioi;

    ioi=xrefs.begin();
    for(;ioi!=xrefs.end();ioi++) {
      gi.remove_object(*ioi);
      // Fixme - deleting the memory here causes SEGV because
      // the objects being cross referenced were new'd outside
      // of the context of this class.
      // delete *ioi;
    }
}

void XrefObject::_add(void *xref)
{
  xrefs.push_back(xref);
}

void XrefObject::clear(void *xref)
{
    xrefs.remove(xref);
}

void XrefObject::_update()
{
  list<void*>::iterator ioi;

  ioi=xrefs.begin();
  for(;ioi!=xrefs.end();++ioi)
  {
    gpointer *xref = (gpointer *) *ioi;

    gi.update_object(xref,get_val());
  }
}


int XrefObject::get_val(void)
{

  if(data)
    return data->get_value();

  return 0;
}

void XrefObject::assign_data(gpsimValue *new_data)
{

  data = new_data;
}