text: #ifndef __UTIL_HPP
  #define __UTIL_HPP
  
  #include <cstdint>
  #include <string>
  
  namespace lance {
  namespace util {
  
  struct unit_info;
  
  static std::string format_unit(long double metric, int precision, const unit_info&);
  std::string format_byte(uint64_t byte, int precision);
  std::string format_time(uint64_t time, int precision);
  std::string format_nano_second(uint64_t time, int precision);
  std::string format_second(double time, int precision);
  }
  }
  
  #endif
  