Function Osiris_RestoreSystemState

Descent3/OsirisLoadandBind.cpp:2686–2823

Osiris_RestoreSystemState Purpose: Restore the state of the system from file (does not restore scripts!)

//	Purpose:
//		Restore the state of the system from file (does not restore scripts!)
bool Osiris_RestoreSystemState(CFILE *file) {
  int i;
  int restore_start = cftell(file);
  int num_bytes_to_be_restored;

  char tag[256];
  cf_ReadString(tag, 256, file);
  if (strcmp(tag, "OSIRIS")) {
    // Things aren't right...our tag is not here
    mprintf(0, "Missing OSIRIS tag\n");
    Int3();
    return false;
  }

  uint8_t version = (uint8_t)cf_ReadByte(file);

  num_bytes_to_be_restored = cf_ReadInt(file);

  Osiris_timer_counter = cf_ReadInt(file);

  // restore timer state
  for (i = 0; i < MAX_OSIRIS_TIMERS; i++) {
    if (cf_ReadByte(file)) {
      // timer is used
      OsirisTimers[i].flags = cf_ReadShort(file);
      OsirisTimers[i].id = cf_ReadInt(file);
      OsirisTimers[i].repeat_count = cf_ReadInt(file);
      OsirisTimers[i].timer_interval = cf_ReadFloat(file);
      OsirisTimers[i].timer_next_signal = cf_ReadFloat(file);
      OsirisTimers[i].timer_end = cf_ReadFloat(file);
      OsirisTimers[i].objhandle = cf_ReadInt(file);
      OsirisTimers[i].objhandle_detonator = cf_ReadInt(file);
      OsirisTimers[i].handle = cf_ReadInt(file);

    } else {
      OsirisTimers[i].flags = 0;
    }
  }

  // restore auto-saved memory chunks
  Osiris_RestoreMemoryChunks(file);

  // now we need to restore the global state of the DLLs
  // byte offset	size		description
  //	0			1			Number of loaded DLLs
  //		...
  //	+1			1			String length of module name
  //	+2			x			Name of the module
  //	+2+x		4			Size of global data stored
  //	+6+x		y			global data
  //		...
  int loaded_module_count = 0;
  for (i = 0; i < MAX_LOADED_MODULES; i++) {
    if (OSIRIS_loaded_modules[i].flags & OSIMF_INUSE) {
      // this is a loaded module
      loaded_module_count++;
    }
  }