date_facet.hpp

来自「support vector clustering for vc++」· HPP 代码 · 共 776 行 · 第 1/2 页

  template <class date_type, class CharT, class OutItrT>  
  const typename date_facet<date_type, CharT, OutItrT>::char_type 
  date_facet<date_type, CharT, OutItrT>::default_period_separator[4] = { ' ', '/', ' '};

  template <class date_type, class CharT, class OutItrT>  
  const typename date_facet<date_type, CharT, OutItrT>::char_type 
  date_facet<date_type, CharT, OutItrT>::standard_format_specifier[3] = 
    {'%', 'x' };

  template <class date_type, class CharT, class OutItrT>  
  const typename date_facet<date_type, CharT, OutItrT>::char_type 
  date_facet<date_type, CharT, OutItrT>::iso_format_specifier[7] = 
    {'%', 'Y', '%', 'm', '%', 'd' };

  template <class date_type, class CharT, class OutItrT>  
  const typename date_facet<date_type, CharT, OutItrT>::char_type 
  date_facet<date_type, CharT, OutItrT>::iso_format_extended_specifier[9] = 
    {'%', 'Y', '-', '%', 'm', '-', '%', 'd' };

  template <class date_type, class CharT, class OutItrT>  
  const typename date_facet<date_type, CharT, OutItrT>::char_type 
  date_facet<date_type, CharT, OutItrT>::default_date_format[9] = 
    {'%','Y','-','%','b','-','%','d'};



  //! Input facet
  template <class date_type,
            class CharT, 
            class InItrT = std::istreambuf_iterator<CharT, std::char_traits<CharT> > >
  class date_input_facet : public std::locale::facet {
  public:
    typedef typename date_type::duration_type duration_type;
    // greg_weekday is gregorian_calendar::day_of_week_type
    typedef typename date_type::day_of_week_type day_of_week_type;
    typedef typename date_type::day_type day_type;
    typedef typename date_type::month_type month_type;
    typedef typename date_type::year_type year_type;
    typedef boost::date_time::period<date_type,duration_type> period_type;
    typedef std::basic_string<CharT> string_type;
    typedef CharT                    char_type;
    typedef boost::date_time::period_parser<date_type, CharT>  period_parser_type;
    typedef special_values_parser<date_type,CharT> special_values_parser_type; 
    typedef std::vector<std::basic_string<CharT> > input_collection_type;
    typedef format_date_parser<date_type, CharT> format_date_parser_type;
    // date_generators stuff goes here
    typedef date_generator_parser<date_type, CharT> date_gen_parser_type;
    typedef partial_date<date_type>          partial_date_type;
    typedef nth_kday_of_month<date_type>     nth_kday_type;
    typedef first_kday_of_month<date_type>   first_kday_type;
    typedef last_kday_of_month<date_type>    last_kday_type;
    typedef first_kday_after<date_type>      kday_after_type;
    typedef first_kday_before<date_type>     kday_before_type;

    static const char_type long_weekday_format[3];
    static const char_type short_weekday_format[3];
    static const char_type long_month_format[3];
    static const char_type short_month_format[3];
    static const char_type four_digit_year_format[3];
    static const char_type two_digit_year_format[3];
    static const char_type default_period_separator[4];
    static const char_type standard_format_specifier[3];
    static const char_type iso_format_specifier[7];
    static const char_type iso_format_extended_specifier[9];
    static const char_type default_date_format[9]; // YYYY-Mon-DD
    static std::locale::id id;
    
    explicit date_input_facet(::size_t a_ref = 0) 
      : std::locale::facet(a_ref), 
        m_format(default_date_format),
        m_month_format(short_month_format),
        m_weekday_format(short_weekday_format),
        m_year_format(four_digit_year_format),
        m_parser(m_format, std::locale::classic())
        // default period_parser & special_values_parser used
    {}

    explicit date_input_facet(const string_type& format_str,
                              ::size_t a_ref = 0) 
      : std::locale::facet(a_ref), 
        m_format(format_str),
        m_month_format(short_month_format),
        m_weekday_format(short_weekday_format),
        m_year_format(four_digit_year_format),
        m_parser(m_format, std::locale::classic())
        // default period_parser & special_values_parser used
    {}

    explicit date_input_facet(const string_type& format_str,
                              const format_date_parser_type& date_parser,
                              const special_values_parser_type& sv_parser,
                              const period_parser_type& per_parser,
                              const date_gen_parser_type& date_gen_parser,
                              ::size_t ref_count = 0)
      : std::locale::facet(ref_count),
        m_format(format_str),
        m_month_format(short_month_format),
        m_weekday_format(short_weekday_format),
        m_year_format(four_digit_year_format),
        m_parser(date_parser),
        m_date_gen_parser(date_gen_parser),
        m_period_parser(per_parser),
        m_sv_parser(sv_parser)
    {}


    void format(const char_type* const format_str) {
      m_format = format_str;
    }
    virtual void set_iso_format()
    {
      m_format = iso_format_specifier;
    }
    virtual void set_iso_extended_format()
    {
      m_format = iso_format_extended_specifier;
    }
    void month_format(const char_type* const format_str) {
      m_month_format = format_str;
    }
    void weekday_format(const char_type* const format_str) {
      m_weekday_format = format_str;
    }
    void year_format(const char_type* const format_str) {
      m_year_format = format_str;
    }
    
    void period_parser(period_parser_type per_parser) {
      m_period_parser = per_parser;
    }
    void short_weekday_names(const input_collection_type& weekday_names)
    {
      m_parser.short_weekday_names(weekday_names);
    }
    void long_weekday_names(const input_collection_type& weekday_names)
    {
      m_parser.long_weekday_names(weekday_names);
    }

    void short_month_names(const input_collection_type& month_names)
    {
      m_parser.short_month_names(month_names);
    }

    void long_month_names(const input_collection_type& month_names)
    {
      m_parser.long_month_names(month_names);
    }

    void date_gen_element_strings(const input_collection_type& col)
    {
      m_date_gen_parser.element_strings(col);
    }
    void date_gen_element_strings(const string_type& first,
                                  const string_type& second,
                                  const string_type& third,
                                  const string_type& fourth,
                                  const string_type& fifth,
                                  const string_type& last,
                                  const string_type& before,
                                  const string_type& after,
                                  const string_type& of)
                           
    {
      m_date_gen_parser.element_strings(first,second,third,fourth,fifth,last,before,after,of);
    }

    void special_values_parser(special_values_parser_type sv_parser)
    {
      m_sv_parser = sv_parser;
    }

    InItrT get(InItrT& from, 
               InItrT& to, 
               std::ios_base& /*a_ios*/, 
               date_type& d) const
    {
      d = m_parser.parse_date(from, to, m_format, m_sv_parser);
      return from;
    }
    InItrT get(InItrT& from, 
               InItrT& to, 
               std::ios_base& /*a_ios*/, 
               month_type& m) const
    {
      m = m_parser.parse_month(from, to, m_month_format);
      return from;
    }
    InItrT get(InItrT& from, 
               InItrT& to, 
               std::ios_base& /*a_ios*/, 
               day_of_week_type& wd) const
    {
      wd = m_parser.parse_weekday(from, to, m_weekday_format);
      return from;
    }
    //! Expects 1 or 2 digit day range: 1-31
    InItrT get(InItrT& from, 
               InItrT& to, 
               std::ios_base& /*a_ios*/, 
               day_type& d) const
    {
      d = m_parser.parse_var_day_of_month(from, to);
      return from;
    }
    InItrT get(InItrT& from, 
               InItrT& to, 
               std::ios_base& /*a_ios*/, 
               year_type& y) const
    {
      y = m_parser.parse_year(from, to, m_year_format);
      return from;
    }
    InItrT get(InItrT& from, 
               InItrT& to, 
               std::ios_base& a_ios, 
               duration_type& dd) const
    {
      // skip leading whitespace
      while(std::isspace(*from) && from != to) { ++from; } 
     
      /* num_get.get() will always consume the first character if it 
       * is a sign indicator (+/-). Special value strings may begin 
       * with one of these signs so we'll need a copy of it
       * in case num_get.get() fails. */
      char_type c = '\0'; 
      // TODO Are these characters somewhere in the locale?
      if(*from == '-' || *from == '+') { 
        c = *from;
      }
      typedef std::num_get<CharT, InItrT> num_get;
      typename duration_type::duration_rep_type val = 0;
      std::ios_base::iostate err = std::ios_base::goodbit;
      
      if (std::has_facet<num_get>(a_ios.getloc())) {
        from = std::use_facet<num_get>(a_ios.getloc()).get(from, to, a_ios, err, val);
      }
      else {
        num_get* ng = new num_get();
        std::locale l = std::locale(a_ios.getloc(), ng);
        a_ios.imbue(l);
        from = ng->get(from, to, a_ios, err, val);
      }
      if(err & std::ios_base::failbit){
        typedef typename special_values_parser_type::match_results match_results;
        match_results mr;
        if(c == '-' || c == '+') { // was the first character consumed?
          mr.cache += c;
        }
        m_sv_parser.match(from, to, mr);
        if(mr.current_match == match_results::PARSE_ERROR) {
          throw std::ios_base::failure("Parse failed. No match found for '" + mr.cache + "'");
        }
        dd = duration_type(static_cast<special_values>(mr.current_match)); 
      }
      else {
        dd = duration_type(val);
      }
      return from;
    }
    InItrT get(InItrT& from, 
               InItrT& to, 
               std::ios_base& a_ios, 
               period_type& p) const
    {
      p = m_period_parser.get_period(from, to, a_ios, p, duration_type::unit(), *this);     
      return from;
    }
    InItrT get(InItrT& from, 
               InItrT& to, 
               std::ios_base& a_ios, 
               nth_kday_type& nkd) const
    {
      nkd = m_date_gen_parser.get_nth_kday_type(from, to, a_ios, *this);
      return from;
    }
    InItrT get(InItrT& from, 
               InItrT& to, 
               std::ios_base& a_ios, 
               partial_date_type& pd) const
    {

      pd = m_date_gen_parser.get_partial_date_type(from, to, a_ios, *this);
      return from;
    }
    InItrT get(InItrT& from, 
               InItrT& to, 
               std::ios_base& a_ios, 
               first_kday_type& fkd) const
    {
      fkd = m_date_gen_parser.get_first_kday_type(from, to, a_ios, *this);
      return from;
    }
    InItrT get(InItrT& from, 
               InItrT& to, 
               std::ios_base& a_ios, 
               last_kday_type& lkd) const
    {
      lkd = m_date_gen_parser.get_last_kday_type(from, to, a_ios, *this);
      return from;
    }
    InItrT get(InItrT& from, 
               InItrT& to, 
               std::ios_base& a_ios, 
               kday_before_type& fkb) const
    {
      fkb = m_date_gen_parser.get_kday_before_type(from, to, a_ios, *this);
      return from;
    }
    InItrT get(InItrT& from, 
               InItrT& to, 
               std::ios_base& a_ios, 
               kday_after_type& fka) const
    {
      fka = m_date_gen_parser.get_kday_after_type(from, to, a_ios, *this);
      return from;
    }

  protected:
    string_type                   m_format;
    string_type                   m_month_format;
    string_type                   m_weekday_format;
    string_type                   m_year_format;
    format_date_parser_type       m_parser;
    date_gen_parser_type          m_date_gen_parser;
    period_parser_type            m_period_parser;
    special_values_parser_type    m_sv_parser;
  private:
  };


  template <class date_type, class CharT, class OutItrT>
  std::locale::id date_input_facet<date_type, CharT, OutItrT>::id;

  template <class date_type, class CharT, class OutItrT>  
  const typename date_input_facet<date_type, CharT, OutItrT>::char_type 
  date_input_facet<date_type, CharT, OutItrT>::long_weekday_format[3] = {'%','A'};

  template <class date_type, class CharT, class OutItrT>  
  const typename date_input_facet<date_type, CharT, OutItrT>::char_type 
  date_input_facet<date_type, CharT, OutItrT>::short_weekday_format[3] = {'%','a'};

  template <class date_type, class CharT, class OutItrT>  
  const typename date_input_facet<date_type, CharT, OutItrT>::char_type 
  date_input_facet<date_type, CharT, OutItrT>::long_month_format[3] = {'%','B'};

  template <class date_type, class CharT, class OutItrT>  
  const typename date_input_facet<date_type, CharT, OutItrT>::char_type 
  date_input_facet<date_type, CharT, OutItrT>::short_month_format[3] = {'%','b'};

  template <class date_type, class CharT, class OutItrT>  
  const typename date_input_facet<date_type, CharT, OutItrT>::char_type 
  date_input_facet<date_type, CharT, OutItrT>::four_digit_year_format[3] = {'%','Y'};

  template <class date_type, class CharT, class OutItrT>  
  const typename date_input_facet<date_type, CharT, OutItrT>::char_type 
  date_input_facet<date_type, CharT, OutItrT>::two_digit_year_format[3] = {'%','y'};

  template <class date_type, class CharT, class OutItrT>  
  const typename date_input_facet<date_type, CharT, OutItrT>::char_type 
  date_input_facet<date_type, CharT, OutItrT>::default_period_separator[4] = { ' ', '/', ' '};

  template <class date_type, class CharT, class OutItrT>  
  const typename date_input_facet<date_type, CharT, OutItrT>::char_type 
  date_input_facet<date_type, CharT, OutItrT>::standard_format_specifier[3] = 
    {'%', 'x' };

  template <class date_type, class CharT, class OutItrT>  
  const typename date_input_facet<date_type, CharT, OutItrT>::char_type 
  date_input_facet<date_type, CharT, OutItrT>::iso_format_specifier[7] = 
    {'%', 'Y', '%', 'm', '%', 'd' };

  template <class date_type, class CharT, class OutItrT>  
  const typename date_input_facet<date_type, CharT, OutItrT>::char_type 
  date_input_facet<date_type, CharT, OutItrT>::iso_format_extended_specifier[9] = 
    {'%', 'Y', '-', '%', 'm', '-', '%', 'd' };

  template <class date_type, class CharT, class OutItrT>  
  const typename date_input_facet<date_type, CharT, OutItrT>::char_type 
  date_input_facet<date_type, CharT, OutItrT>::default_date_format[9] = 
    {'%','Y','-','%','b','-','%','d'};

} } // namespaces


#endif