Class ::tm

src/thundersvm/util/log.cpp:1108–1108

            std::string DateTime::timevalToString(struct timeval tval, const char* format,
                                                  const el::base::SubsecondPrecision* ssPrec) {
                struct ::tm timeInfo;
                buildTimeInfo(&tval, &timeInfo);
                const int kBuffSize = 30;
                char buff_[kBuffSize] = "";