/* DLIFE Copyright (C) 2000 Richard W.M. Jones <rich@annexia.org>
 * and other authors listed in the ``AUTHORS'' file.
 *
 * 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.
 *
 * $Id: image.c,v 1.2 2002/04/05 16:47:12 rich Exp $
 */

#include "config.h"

#include <stdio.h>
#include <stdlib.h>

#include "image.h"
#include "state.h"
#include "cell.h"
#include "soup.h"

#define FILE_SAVE_VERSION 1

static void global_state_save (struct state *state, FILE *fp);
static void global_state_load (struct state *state, FILE *fp);

struct state *
image_load (const char *filename, int _soup_size, int thread_num)
{
  FILE *fp;
  struct state *state;

  fp = fopen (filename, "r");
  if (fp == 0) { perror (filename); return 0; }

  state = state_malloc (_soup_size, thread_num);

  global_state_load (state, fp);
  cell_state_load (state, fp);
  soup_state_load (state, fp);

  fclose (fp);

  return state;
}

int
image_save (struct state *state, const char *filename)
{
  FILE *fp;

  fp = fopen (filename, "w");
  if (fp == 0) { perror (filename); return -1; }

  global_state_save (state, fp);
  cell_state_save (state, fp);
  soup_state_save (state, fp);

  fclose (fp);

  return 0;
}

static void
global_state_save (struct state *state, FILE *fp)
{
  int version = FILE_SAVE_VERSION;

  fwrite (&version, sizeof version, 1, fp);
  fwrite (&state->cell_cycle, sizeof state->cell_cycle, 1, fp);
}

static void
global_state_load (struct state *state, FILE *fp)
{
  int version;

  if (fread (&version, sizeof version, 1, fp) != 1)
    {
      fprintf (stderr, "error in global state\n");
      abort ();
    }
  if (version != FILE_SAVE_VERSION)
    {
      fprintf (stderr, "soup image version numbers do not match\n");
      abort ();
    }

  if (fread (&state->cell_cycle, sizeof state->cell_cycle, 1, fp) != 1)
    {
      fprintf (stderr, "error in global state\n");
      abort ();
    }

  if (verbose) printf ("Total number of cycles executed so far: %LuB\n",
		       state->cell_cycle / 1000000000);
}