date_time/gregorian/greg_weekday.hpp

0001 #ifndef GREG_WEEKDAY_HPP___
0002 #define GREG_WEEKDAY_HPP___
0003
0004 /* Copyright (c) 2002,2003,2020 CrystalClear Software, Inc.
0005  * Use, modification and distribution is subject to the
0006  * Boost Software License, Version 1.0. (See accompanying
0007  * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
0008  * Author: Jeff Garland, Bart Garst
0009  * $Date$
0010  */
0011
0012 #include <boost/date_time/constrained_value.hpp>
0013 #include <boost/date_time/date_defs.hpp>
0014 #include <boost/date_time/compiler_config.hpp>
0015 #include <stdexcept>
0016 #include <string>
0017
0018 namespace boost {
0019 namespace gregorian {
0020
0021   //bring enum values into the namespace
0022   using date_time::Sunday;
0023   using date_time::Monday;
0024   using date_time::Tuesday;
0025   using date_time::Wednesday;
0026   using date_time::Thursday;
0027   using date_time::Friday;
0028   using date_time::Saturday;
0029
0030
0031   //! Exception that flags that a weekday number is incorrect
0032   struct BOOST_SYMBOL_VISIBLE bad_weekday : public std::out_of_range
0033   {
0034     bad_weekday() : std::out_of_range(std::string("Weekday is out of range 0..6")) {}
0035   };
0036   typedef CV::simple_exception_policy<unsigned short, 0, 6, bad_weekday> greg_weekday_policies;
0037   typedef CV::constrained_value<greg_weekday_policies> greg_weekday_rep;
0038
0039
0040   //! Represent a day within a week (range 0==Sun to 6==Sat)
0041   class BOOST_SYMBOL_VISIBLE greg_weekday : public greg_weekday_rep {
0042   public:
0043     typedef boost::date_time::weekdays weekday_enum;
0044     BOOST_CXX14_CONSTEXPR greg_weekday(value_type day_of_week_num) :
0045       greg_weekday_rep(day_of_week_num)
0046     {}
0047
0048     BOOST_CXX14_CONSTEXPR value_type as_number() const {return value_;}
0049     BOOST_CXX14_CONSTEXPR weekday_enum as_enum() const {return static_cast<weekday_enum>(value_);}
0050
0051     //! Return a 3 digit english string of the day of week (eg: Sun)
0052     const char* as_short_string() const
0053     {
0054       static const char* const short_weekday_names[]
0055         = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
0056
0057       return short_weekday_names[value_];
0058     }
0059
0060     //! Return a point to a long english string representing day of week
0061     const char* as_long_string() const
0062     {
0063       static const char* const long_weekday_names[]
0064         = {"Sunday","Monday","Tuesday","Wednesday", "Thursday", "Friday", "Saturday"};
0065
0066       return long_weekday_names[value_];
0067     }
0068
0069
0070 #ifndef BOOST_NO_STD_WSTRING
0071
0072     //! Return a 3 digit english wchar_t string of the day of week (eg: Sun)
0073     const wchar_t* as_short_wstring() const
0074     {
0075       static const wchar_t* const w_short_weekday_names[]={L"Sun", L"Mon", L"Tue",
0076                                                            L"Wed", L"Thu", L"Fri", L"Sat"};
0077       return w_short_weekday_names[value_];
0078     }
0079
0080     //! Return a point to a long english wchar_t string representing day of week
0081     const wchar_t* as_long_wstring()  const
0082     {
0083       static const wchar_t* const w_long_weekday_names[]= {L"Sunday",L"Monday",L"Tuesday",
0084                                                            L"Wednesday", L"Thursday",
0085                                                            L"Friday", L"Saturday"};
0086       return w_long_weekday_names[value_];
0087     }
0088
0089 #endif // BOOST_NO_STD_WSTRING
0090
0091
0092   };
0093
0094
0095
0096 } } //namespace gregorian
0097
0098
0099
0100 #endif