Now.hpp

   1 #ifndef NOW_DOT_HPP
   2 #define NOW_DOT_HPP
   3
   4 #include <sys/time.h>
   5
   6 #include <glog/logging.h>
   7
   8 class Now {
   9 public:
  10   Now();
  11
  12   auto        sec() const { return tv_.tv_sec; }
  13   auto        usec() const { return tv_.tv_usec; }
  14   const char* c_str() const { return c_str_; }
  15
  16 private:
  17   timeval tv_;
  18   char    c_str_[32]; // RFC 5322 date-time section 3.3.
  19
  20   friend std::ostream& operator<<(std::ostream& s, Now const& now)
  21   {
  22     return s << now.c_str_;
  23   }
  24 };
  25
  26 inline Now::Now()
  27 {
  28   PCHECK(gettimeofday(&tv_, nullptr) == 0);
  29   tm* ptm = CHECK_NOTNULL(localtime(&tv_.tv_sec));
  30   CHECK_EQ(strftime(c_str_, sizeof c_str_, "%a, %d %b %Y %H:%M:%S %z", ptm),
  31            sizeof(c_str_) - 1);
  32 }
  33
  34 #endif // NOW_DOT_HPP