Function DemoReadHeader

Descent3/demofile.cpp:738–892

extern bool IsRestoredGame;
int DemoReadHeader() {
  char szsig[10];
  int16_t ver;
  char demo_mission[_MAX_PATH];
  int level_num;
  int frame_count;
  float demo_gametime;
  mprintf(0, "Reading demo header...\n");
  ASSERT(Demo_flags == DF_PLAYBACK);
  cf_ReadString((char *)szsig, 10, Demo_cfp);
  ver = cf_ReadShort(Demo_cfp);

  if (strcmp(szsig, D3_DEMO_SIG) != 0) {
    if (strcmp(szsig, D3_DEMO_SIG_NEW) != 0) {
      mprintf(0, "Bad demo header signature!\n");
      return 0;
    }
  }

  if (ver > GAMESAVE_VERSION) {
    // This file version is too new!
    // return 0;
  }

  cf_ReadString(demo_mission, _MAX_PATH, Demo_cfp);
  level_num = cf_ReadInt(Demo_cfp);
  demo_gametime = cf_ReadFloat(Demo_cfp);
  frame_count = cf_ReadInt(Demo_cfp);

  // Now load the mission
  Osiris_DisableCreateEvents();
  IsRestoredGame = true;
  if (LoadMission((const char *)demo_mission)) {
    mng_LoadAddonPages();

    SetCurrentLevel(level_num);
    if (!LoadAndStartCurrentLevel()) {
      mprintf(0, "Couldn't start new level to play back the demo!\n");
      Osiris_EnableCreateEvents();
      return 0;
    }
  } else {
    mprintf(0, "Couldn't load the level to play back the demo!\n");
    Osiris_EnableCreateEvents();
    return 0;
  }
  Osiris_EnableCreateEvents();

  FrameCount = frame_count;
  Demo_next_frame = demo_gametime;

  if (gs_Xlates)
    mem_free(gs_Xlates);
  gs_Xlates = (struct gs_tables *)mem_malloc(sizeof(gs_tables));

  try {
    LGSXlateTables(Demo_cfp);