jnk/Now-C++.hpp

   1 /*
   2
   3 This version of Now added 103040 bytes of text (code) and 488 bytes of
   4 data to my smtp program vs. the old school C/Unix style code in the
   5 version I'm using.  Plus, it's dynamic memory for the string, etc.  It
   6 seems to just call the same strftime from libc anyhow.
   7
   8 Also: this went away:
   9
  10 ==32766== Conditional jump or move depends on uninitialised value(s)
  11 ==32766==    at 0x844FF22: __strftime_internal (strftime_l.c:543)
  12 ==32766==    by 0x8451FA5: strftime_l (strftime_l.c:459)
  13 ==32766==    by 0x7B81C88: std::__timepunct<char>::_M_put(char*, unsigned long,
  14 char const*, tm const*) const (time_members.cc:47)
  15 ==32766==    by 0x7BD7621: std::time_put<char, std::ostreambuf_iterator<char,
  16 std::char_traits<char> > >::do_put(std::ostreambuf_iterator<char,
  17 std::char_traits<char> >, std::ios_base&, char, tm const*, char, char) const
  18 (locale_facets_nonio.tcc:1343)
  19 ==32766==    by 0x7BD5BC6: std::time_put<char, std::ostreambuf_iterator<char,
  20 std::char_traits<char> > >::put(std::ostreambuf_iterator<char,
  21 std::char_traits<char> >, std::ios_base&, char, tm const*, char const*, char
  22 const*) const (locale_facets_nonio.tcc:1302)
  23 ==32766==    by 0x415C71: RFC5321::Ctx::new_msg() (in
  24 /z/home/gene/work/ghsmtp/smtp)
  25 ==32766==    by 0x4187A3: bool
  26 tao::pegtl::internal::seq<tao::pegtl::sor<RFC5321::bogus_cmd_short,
  27 RFC5321::data, RFC5321::quit, RFC5321::rset, RFC5321::noop, RFC5321::vrfy,
  28 RFC5321::help, RFC5321::helo, RFC5321::ehlo, RFC5321::bdat, RFC5321::bdat_last,
  29 RFC5321::starttls, RFC5321::rcpt_to, RFC5321::mail_from,
  30 RFC5321::bogus_cmd_long, RFC5321::anything_else>,
  31 tao::pegtl::discard>::match<(tao::pegtl::apply_mode)1,
  32 (tao::pegtl::rewind_mode)1, RFC5321::action, tao::pegtl::normal,
  33 tao::pegtl::istream_input<tao::pegtl::ascii::eol::crlf>,
  34 RFC5321::Ctx&>(tao::pegtl::istream_input<tao::pegtl::ascii::eol::crlf>&,
  35 RFC5321::Ctx&) (in /z/home/gene/work/ghsmtp/smtp)
  36 ==32766==    by 0x41092A: main (in /z/home/gene/work/ghsmtp/smtp)
  37 ==32766==
  38
  39 */
  40
  41 // This on x86_64 using gcc version 7.1.1.
  42
  43 #ifndef NOW_DOT_HPP
  44 #define NOW_DOT_HPP
  45
  46 #include <chrono>
  47 #include <iostream>
  48
  49 #include <glog/logging.h>
  50
  51 #include "date/tz.h"
  52
  53 class Now {
  54 public:
  55   Now()
  56     : v_{std::chrono::system_clock::now()}
  57     , str_{
  58           // RFC 5322 section 3.3 date-time.
  59           date::format("%a, %d %b %Y %H:%M:%S %z",
  60                        date::make_zoned(date::current_zone(),
  61                                         date::floor<std::chrono::seconds>(v_)))}
  62   {
  63     CHECK_EQ(str_.length(), 31) << str_ << " is the wrong length";
  64   }
  65
  66   auto sec() const
  67   {
  68     return std::chrono::duration_cast<std::chrono::seconds>(
  69                v_.time_since_epoch())
  70         .count();
  71   }
  72   auto usec() const
  73   {
  74     return std::chrono::duration_cast<std::chrono::microseconds>(
  75                v_.time_since_epoch())
  76         .count();
  77   }
  78
  79   std::string const& string() const { return str_; }
  80
  81   bool operator==(Now const& that) const { return v_ == that.v_; }
  82   bool operator!=(Now const& that) const { return !(*this == that); }
  83
  84 private:
  85   std::chrono::time_point<std::chrono::system_clock> v_;
  86   std::string str_;
  87
  88   friend std::ostream& operator<<(std::ostream& s, Now const& now)
  89   {
  90     return s << now.str_;
  91   }
  92 };
  93
  94 #endif // NOW_DOT_HPP