static int convert_coordinate (std::string);
static std::list<SubRipSubtitlePiece> convert_content (std::list<std::string>);
static void maybe_content (std::list<SubRipSubtitlePiece> &, SubRipSubtitlePiece &);
static int convert_coordinate (std::string);
static std::list<SubRipSubtitlePiece> convert_content (std::list<std::string>);
static void maybe_content (std::list<SubRipSubtitlePiece> &, SubRipSubtitlePiece &);