char source_filename[BCTEXTLEN], index_filename[BCTEXTLEN];
IndexFile::get_index_filename(source_filename,
index_directory, index_filename, asset->path, ".toc");
char source_filename[BCTEXTLEN], index_filename[BCTEXTLEN];
IndexFile::get_index_filename(source_filename,
index_directory, index_filename, asset->path, ".toc");