Function Osiris_SaveSystemState

Descent3/OsirisLoadandBind.cpp:2575–2681

Osiris_SaveSystemState Purpose: Saves the current state of the system (not the scripts!) to file

//	Purpose:
//		Saves the current state of the system (not the scripts!) to file
void Osiris_SaveSystemState(CFILE *file) {
  int i;
  int save_start = cftell(file);
  int checksum_pos;

  cf_WriteString(file, "OSIRIS");

  cf_WriteByte(file, OSIRIS_SYSTEM_FILEVERSION);

  checksum_pos = cftell(file);
  cf_WriteInt(file, 0); // this will be # of bytes writtens

  cf_WriteInt(file, Osiris_timer_counter);

  // save out the timer state
  for (i = 0; i < MAX_OSIRIS_TIMERS; i++) {
    if (OsirisTimers[i].flags & OITF_USED) {
      // write out information about this timer
      cf_WriteByte(file, 1); // timer exists
      cf_WriteShort(file, OsirisTimers[i].flags);
      cf_WriteInt(file, OsirisTimers[i].id);
      cf_WriteInt(file, OsirisTimers[i].repeat_count);
      cf_WriteFloat(file, OsirisTimers[i].timer_interval);
      cf_WriteFloat(file, OsirisTimers[i].timer_next_signal);
      cf_WriteFloat(file, OsirisTimers[i].timer_end);
      cf_WriteInt(file, OsirisTimers[i].objhandle);
      cf_WriteInt(file, OsirisTimers[i].objhandle_detonator);
      cf_WriteInt(file, OsirisTimers[i].handle);
    } else {
      cf_WriteByte(file, 0);
    }
  }

  // auto-save script mallocs
  Osiris_SaveMemoryChunks(file);

  // go through all loaded DLLs and save states
  // this is touchy, we need to make sure all DLL modules that are currently
  // loaded, be loaded when we restore states.  As a safety precaution, the Global
  // state will be saved as the following (an array of the following):
  // 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
  //		...

  // first count up the number of loaded modules
  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++;
    }
  }