boost/date_time/gregorian/greg_facet.hpp
#ifndef GREGORIAN_FACET_HPP___ #define GREGORIAN_FACET_HPP___ /* Copyright (c) 2002,2003 CrystalClear Software, Inc. * Use, modification and distribution is subject to the * Boost Software License, Version 1.0. (See accompanying * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) * Author: Jeff Garland, Bart Garst * $Date: 2008-11-23 03:13:35 -0800 (Sun, 23 Nov 2008) $ */ #include "boost/date_time/gregorian/gregorian_types.hpp" #include "boost/date_time/date_formatting_locales.hpp" // sets BOOST_DATE_TIME_NO_LOCALE #include "boost/date_time/gregorian/parsers.hpp" //This file is basically commented out if locales are not supported #ifndef BOOST_DATE_TIME_NO_LOCALE #include <string> #include <memory> #include <locale> #include <iostream> #include <exception> namespace boost { namespace gregorian { //! Configuration of the output facet template struct greg_facet_config { typedef boost::gregorian::greg_month month_type; typedef boost::date_time::special_values special_value_enum; typedef boost::gregorian::months_of_year month_enum; typedef boost::date_time::weekdays weekday_enum; }; #if defined(USE_DATE_TIME_PRE_1_33_FACET_IO) //! Create the base facet type for gregorian::date typedef boost::date_time::date_names_put<greg_facet_config> greg_base_facet; //! ostream operator for gregorian::date /*! Uses the date facet to determine various output parameters including: * - string values for the month (eg: Jan, Feb, Mar) (default: English) * - string values for special values (eg: not-a-date-time) (default: English) * - selection of long, short strings, or numerical month representation (default: short string) * - month day year order (default yyyy-mmm-dd) */ template <class charT, class traits> inline std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& os, const date& d) { typedef boost::date_time::date_names_put<greg_facet_config, charT> facet_def; typedef boost::date_time::ostream_date_formatter<date, facet_def, charT> greg_ostream_formatter; greg_ostream_formatter::date_put(d, os); return os; } //! operator<< for gregorian::greg_month typically streaming: Jan, Feb, Mar... /*! Uses the date facet to determine output string as well as selection of long or short strings. * Default if no facet is installed is to output a 2 wide numeric value for the month * eg: 01 == Jan, 02 == Feb, ... 12 == Dec. */ template <class charT, class traits> inline std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& os, const greg_month& m) { typedef boost::date_time::date_names_put<greg_facet_config, charT> facet_def; typedef boost::date_time::ostream_month_formatter<facet_def, charT> greg_month_formatter; std::locale locale = os.getloc(); if (std::has_facet<facet_def>(locale)) { const facet_def& f = std::use_facet<facet_def>(locale); greg_month_formatter::format_month(m, os, f); } else { //default to numeric charT fill_char = '0'; os << std::setw(2) << std::setfill(fill_char) << m.as_number(); } return os; } //! operator<< for gregorian::greg_weekday typically streaming: Sun, Mon, Tue, ... /*! Uses the date facet to determine output string as well as selection of long or short string. * Default if no facet is installed is to output a 3 char english string for the * day of the week. */ template <class charT, class traits> inline std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& os, const greg_weekday& wd) { typedef boost::date_time::date_names_put<greg_facet_config, charT> facet_def; typedef boost::date_time::ostream_weekday_formatter<greg_weekday, facet_def, charT> greg_weekday_formatter; std::locale locale = os.getloc(); if (std::has_facet<facet_def>(locale)) { const facet_def& f = std::use_facet<facet_def>(locale); greg_weekday_formatter::format_weekday(wd.as_enum(), os, f, true); } else { //default to short English string eg: Sun, Mon, Tue, Wed... os << wd.as_short_string(); } return os; } //! operator<< for gregorian::date_period typical output: [2002-Jan-01/2002-Jan-31] /*! Uses the date facet to determine output string as well as selection of long * or short string fr dates. * Default if no facet is installed is to output a 3 char english string for the * day of the week. */ template <class charT, class traits> inline std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& os, const date_period& dp) { os << '['; //TODO: facet or manipulator for periods? os << dp.begin(); os << '/'; //TODO: facet or manipulator for periods? os << dp.last(); os << ']'; return os; } template <class charT, class traits> inline std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& os, const date_duration& dd) { //os << dd.days(); os << dd.get_rep(); return os; } //! operator<< for gregorian::partial_date. Output: "Jan 1" template <class charT, class traits> inline std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& os, const partial_date& pd) { os << std::setw(2) << std::setfill('0') << pd.day() << ' ' << pd.month().as_short_string() ; return os; } //! operator<< for gregorian::nth_kday_of_month. Output: "first Mon of Jun" template <class charT, class traits> inline std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& os, const nth_kday_of_month& nkd) { os << nkd.nth_week_as_str() << ' ' << nkd.day_of_week() << " of " << nkd.month().as_short_string() ; return os; } //! operator<< for gregorian::first_kday_of_month. Output: "first Mon of Jun" template <class charT, class traits> inline std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& os, const first_kday_of_month& fkd) { os << "first " << fkd.day_of_week() << " of " << fkd.month().as_short_string() ; return os; } //! operator<< for gregorian::last_kday_of_month. Output: "last Mon of Jun" template <class charT, class traits> inline std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& os, const last_kday_of_month& lkd) { os << "last " << lkd.day_of_week() << " of " << lkd.month().as_short_string() ; return os; } //! operator<< for gregorian::first_kday_after. Output: "first Mon after" template <class charT, class traits> inline std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& os, const first_kday_after& fka) { os << fka.day_of_week() << " after"; return os; } //! operator<< for gregorian::first_kday_before. Output: "first Mon before" template <class charT, class traits> inline std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& os, const first_kday_before& fkb) { os << fkb.day_of_week() << " before"; return os; } #endif // USE_DATE_TIME_PRE_1_33_FACET_IO /**************** Input Streaming ******************/ #if !defined(BOOST_NO_STD_ITERATOR_TRAITS) //! operator>> for gregorian::date template<class charT> inline std::basic_istream<charT>& operator>>(std::basic_istream<charT>& is, date& d) { std::istream_iterator<std::basic_string<charT>, charT> beg(is), eos; typedef boost::date_time::all_date_names_put<greg_facet_config, charT> facet_def; d = from_stream(beg, eos); return is; } #endif // BOOST_NO_STD_ITERATOR_TRAITS //! operator>> for gregorian::date_duration template<class charT> inline std::basic_istream<charT>& operator>>(std::basic_istream<charT>& is, date_duration& dd) { long v; is >> v; dd = date_duration(v); return is; } //! operator>> for gregorian::date_period template<class charT> inline std::basic_istream<charT>& operator>>(std::basic_istream<charT>& is, date_period& dp) { std::basic_string<charT> s; is >> s; dp = date_time::from_simple_string_type<date>(s); return is; } //! generates a locale with the set of gregorian name-strings of type char* BOOST_DATE_TIME_DECL std::locale generate_locale(std::locale& loc, char type); //! Returns a pointer to a facet with a default set of names (English) /* Necessary in the event an exception is thrown from op>> for * weekday or month. See comments in those functions for more info */ BOOST_DATE_TIME_DECL boost::date_time::all_date_names_put<greg_facet_config, char>* create_facet_def(char type); #ifndef BOOST_NO_STD_WSTRING //! generates a locale with the set of gregorian name-strings of type wchar_t* BOOST_DATE_TIME_DECL std::locale generate_locale(std::locale& loc, wchar_t type); //! Returns a pointer to a facet with a default set of names (English) /* Necessary in the event an exception is thrown from op>> for * weekday or month. See comments in those functions for more info */ BOOST_DATE_TIME_DECL boost::date_time::all_date_names_put<greg_facet_config, wchar_t>* create_facet_def(wchar_t type); #endif // BOOST_NO_STD_WSTRING //! operator>> for gregorian::greg_month - throws exception if invalid month given template<class charT> inline std::basic_istream<charT>& operator>>(std::basic_istream<charT>& is,greg_month& m) { typedef boost::date_time::all_date_names_put<greg_facet_config, charT> facet_def; std::basic_string<charT> s; is >> s; if(!std::has_facet<facet_def>(is.getloc())) { std::locale loc = is.getloc(); charT a = '\0'; is.imbue(generate_locale(loc, a)); } short num = 0; try{ const facet_def& f = std::use_facet<facet_def>(is.getloc()); num = date_time::find_match(f.get_short_month_names(), f.get_long_month_names(), (greg_month::max)(), s); // greg_month spans 1..12, so max returns the array size, // which is needed by find_match } /* bad_cast will be thrown if the desired facet is not accessible * so we can generate the facet. This has the drawback of using english * names as a default. */ catch(std::bad_cast&){ charT a = '\0'; std::auto_ptr< const facet_def > f(create_facet_def(a)); num = date_time::find_match(f->get_short_month_names(), f->get_long_month_names(), (greg_month::max)(), s); // greg_month spans 1..12, so max returns the array size, // which is needed by find_match } ++num; // months numbered 1-12 m = greg_month(num); return is; } //! operator>> for gregorian::greg_weekday - throws exception if invalid weekday given template<class charT> inline std::basic_istream<charT>& operator>>(std::basic_istream<charT>& is,greg_weekday& wd) { typedef boost::date_time::all_date_names_put<greg_facet_config, charT> facet_def; std::basic_string<charT> s; is >> s; if(!std::has_facet<facet_def>(is.getloc())) { std::locale loc = is.getloc(); charT a = '\0'; is.imbue(generate_locale(loc, a)); } short num = 0; try{ const facet_def& f = std::use_facet<facet_def>(is.getloc()); num = date_time::find_match(f.get_short_weekday_names(), f.get_long_weekday_names(), (greg_weekday::max)() + 1, s); // greg_weekday spans 0..6, so increment is needed // to form the array size which is needed by find_match } /* bad_cast will be thrown if the desired facet is not accessible * so we can generate the facet. This has the drawback of using english * names as a default. */ catch(std::bad_cast&){ charT a = '\0'; std::auto_ptr< const facet_def > f(create_facet_def(a)); num = date_time::find_match(f->get_short_weekday_names(), f->get_long_weekday_names(), (greg_weekday::max)() + 1, s); // greg_weekday spans 0..6, so increment is needed // to form the array size which is needed by find_match } wd = greg_weekday(num); // weekdays numbered 0-6 return is; } } } //namespace gregorian #endif #endif