static std::string DicomString(const char *s, size_t l);
static std::string DicomString(const char *s);
static bool DicomStringEqual(const std::string &s1, const char *s2);
static std::string DicomString(const char *s, size_t l);
static std::string DicomString(const char *s);
static bool DicomStringEqual(const std::string &s1, const char *s2);