/****************************************************************************
 *  config.c
 *
 *  Genesis Plus GX configuration file support
 *
 *  code by Eke-Eke (2008)
 *
 *  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 "shared.h"

void config_save(void)
{
  /* open configuration file */
  char fname[MAXPATHLEN];
  sprintf (fname, "%s/config.ini", DEFAULT_PATH);
  FILE *fp = fopen(fname, "wb");
  if (fp)
  {
    /* write file */
    fwrite(&config, sizeof(config), 1, fp);
    fclose(fp);
  }
}

void config_load(void)
{
  /* open configuration file */
  char fname[MAXPATHLEN];
  sprintf (fname, "%s/config.ini", DEFAULT_PATH);
  FILE *fp = fopen(fname, "rb");
  if (fp)
  {
    /* read version */
    char version[16];
    fread(version, 16, 1, fp); 
    fclose(fp);
    if (strcmp(version,VERSION)) return;

    /* read file */
    fp = fopen(fname, "rb");
    if (fp)
    {
      fread(&config, sizeof(config), 1, fp);
      fclose(fp);
    }
  }
}

void config_default(void)
{
  /* version TAG */
  strncpy(config.version,VERSION,16);

  /* sound options */
  config.psg_preamp   = 150;
  config.fm_preamp    = 100;
  config.boost        = 1;
  config.hq_fm        = 1;
  config.filter       = 1;

  /* system options */
  config.region_detect  = 0;
  config.force_dtack    = 0;
  config.bios_enabled   = 0;

  /* video options */
  config.xshift   = 0;
  config.yshift   = 0;
  config.xscale   = 0;
  config.yscale   = 0;
  config.aspect   = 1;
  config.overscan = 1;
  config.render   = VIDEO_HaveComponentCable() ? 2 : 0;
  config.ntsc     = 0;
  config.bilinear = 1;

  /* controllers options */
  gx_input_SetDefault();
  config.gun_cursor   = 1;
  config.invert_mouse = 0;

  /* menu options */
#ifdef HW_RVL
  config.sram_auto  = 0; /* let's assume we always have a FAT device by default */
#else
  config.sram_auto  = -1;
#endif
  config.state_auto = -1;
  config.bg_color   = 0;
  config.bgm_volume = 100.0;
  config.sfx_volume = 100.0;

  /* restore saved configuration */
  config_load();
}