Function LoadGroup

editor/Group.cpp:753–847

Loads a group from disk

// Loads a group from disk
group *LoadGroup(char *filename) {
  CFILE *ifile;
  char tag[4];
  int version, level_version;
  group *g;
  int i;

  ifile = cfopen(filename, "rb");

  if (!ifile)
    return NULL;

  // Read & check tag
  cf_ReadBytes((uint8_t *)tag, 4, ifile);
  if (strncmp(tag, GROUP_FILE_TAG, 4)) {
    cfclose(ifile);
    return NULL;
  }

  // Read & check version number
  version = cf_ReadInt(ifile);
  if (version > GROUP_FILE_VERSION) {
    cfclose(ifile);
    return NULL;
  }

  // Check for out-of-date groups
  if (version < 2) {
    OutrageMessageBox("Sorry - segment groups no longer supported.");
    cfclose(ifile);
    return NULL;
  }

  // Read & check level file version number
  level_version = cf_ReadInt(ifile);
  if (level_version > LEVEL_FILE_VERSION) {
    cfclose(ifile);
    return NULL;
  }

  // Read the textures & build xlate table
  ReadTextureList(ifile);

  // Allocate group
  g = (group *)mem_malloc(sizeof(*g));

  // Read group info
  g->nrooms = cf_ReadInt(ifile);
  g->attachroom = cf_ReadInt(ifile);
  g->attachface = cf_ReadInt(ifile);

  // Read object, door, & trigger info
  if (version >= 3) {
    g->nobjects = cf_ReadInt(ifile);
    g->ndoors = cf_ReadInt(ifile);
    g->ntriggers = cf_ReadInt(ifile);
  } else
    g->nobjects = g->ndoors = g->ntriggers = 0;