355 lines
13 KiB
C++
355 lines
13 KiB
C++
#ifndef GREGORIAN_FACET_HPP___
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#define GREGORIAN_FACET_HPP___
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/* Copyright (c) 2002,2003 CrystalClear Software, Inc.
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* Use, modification and distribution is subject to the
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* Boost Software License, Version 1.0. (See accompanying
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* file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
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* Author: Jeff Garland, Bart Garst
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* $Date: 2008-11-23 06:13:35 -0500 (Sun, 23 Nov 2008) $
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*/
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#include "boost/date_time/gregorian/gregorian_types.hpp"
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#include "boost/date_time/date_formatting_locales.hpp" // sets BOOST_DATE_TIME_NO_LOCALE
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#include "boost/date_time/gregorian/parsers.hpp"
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//This file is basically commented out if locales are not supported
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#ifndef BOOST_DATE_TIME_NO_LOCALE
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#include <string>
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#include <memory>
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#include <locale>
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#include <iostream>
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#include <exception>
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namespace boost {
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namespace gregorian {
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//! Configuration of the output facet template
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struct greg_facet_config
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{
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typedef boost::gregorian::greg_month month_type;
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typedef boost::date_time::special_values special_value_enum;
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typedef boost::gregorian::months_of_year month_enum;
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typedef boost::date_time::weekdays weekday_enum;
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};
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#if defined(USE_DATE_TIME_PRE_1_33_FACET_IO)
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//! Create the base facet type for gregorian::date
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typedef boost::date_time::date_names_put<greg_facet_config> greg_base_facet;
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//! ostream operator for gregorian::date
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/*! Uses the date facet to determine various output parameters including:
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* - string values for the month (eg: Jan, Feb, Mar) (default: English)
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* - string values for special values (eg: not-a-date-time) (default: English)
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* - selection of long, short strings, or numerical month representation (default: short string)
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* - month day year order (default yyyy-mmm-dd)
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*/
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template <class charT, class traits>
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inline
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std::basic_ostream<charT, traits>&
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operator<<(std::basic_ostream<charT, traits>& os, const date& d)
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{
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typedef boost::date_time::date_names_put<greg_facet_config, charT> facet_def;
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typedef boost::date_time::ostream_date_formatter<date, facet_def, charT> greg_ostream_formatter;
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greg_ostream_formatter::date_put(d, os);
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return os;
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}
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//! operator<< for gregorian::greg_month typically streaming: Jan, Feb, Mar...
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/*! Uses the date facet to determine output string as well as selection of long or short strings.
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* Default if no facet is installed is to output a 2 wide numeric value for the month
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* eg: 01 == Jan, 02 == Feb, ... 12 == Dec.
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*/
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template <class charT, class traits>
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inline
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std::basic_ostream<charT, traits>&
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operator<<(std::basic_ostream<charT, traits>& os, const greg_month& m)
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{
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typedef boost::date_time::date_names_put<greg_facet_config, charT> facet_def;
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typedef boost::date_time::ostream_month_formatter<facet_def, charT> greg_month_formatter;
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std::locale locale = os.getloc();
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if (std::has_facet<facet_def>(locale)) {
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const facet_def& f = std::use_facet<facet_def>(locale);
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greg_month_formatter::format_month(m, os, f);
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}
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else { //default to numeric
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charT fill_char = '0';
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os << std::setw(2) << std::setfill(fill_char) << m.as_number();
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}
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return os;
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}
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//! operator<< for gregorian::greg_weekday typically streaming: Sun, Mon, Tue, ...
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/*! Uses the date facet to determine output string as well as selection of long or short string.
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* Default if no facet is installed is to output a 3 char english string for the
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* day of the week.
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*/
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template <class charT, class traits>
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inline
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std::basic_ostream<charT, traits>&
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operator<<(std::basic_ostream<charT, traits>& os, const greg_weekday& wd)
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{
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typedef boost::date_time::date_names_put<greg_facet_config, charT> facet_def;
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typedef boost::date_time::ostream_weekday_formatter<greg_weekday, facet_def, charT> greg_weekday_formatter;
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std::locale locale = os.getloc();
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if (std::has_facet<facet_def>(locale)) {
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const facet_def& f = std::use_facet<facet_def>(locale);
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greg_weekday_formatter::format_weekday(wd.as_enum(), os, f, true);
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}
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else { //default to short English string eg: Sun, Mon, Tue, Wed...
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os << wd.as_short_string();
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}
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return os;
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}
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//! operator<< for gregorian::date_period typical output: [2002-Jan-01/2002-Jan-31]
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/*! Uses the date facet to determine output string as well as selection of long
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* or short string fr dates.
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* Default if no facet is installed is to output a 3 char english string for the
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* day of the week.
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*/
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template <class charT, class traits>
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inline
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std::basic_ostream<charT, traits>&
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operator<<(std::basic_ostream<charT, traits>& os, const date_period& dp)
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{
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os << '['; //TODO: facet or manipulator for periods?
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os << dp.begin();
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os << '/'; //TODO: facet or manipulator for periods?
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os << dp.last();
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os << ']';
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return os;
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}
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template <class charT, class traits>
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inline
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std::basic_ostream<charT, traits>&
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operator<<(std::basic_ostream<charT, traits>& os, const date_duration& dd)
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{
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//os << dd.days();
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os << dd.get_rep();
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return os;
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}
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//! operator<< for gregorian::partial_date. Output: "Jan 1"
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template <class charT, class traits>
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inline
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std::basic_ostream<charT, traits>&
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operator<<(std::basic_ostream<charT, traits>& os, const partial_date& pd)
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{
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os << std::setw(2) << std::setfill('0') << pd.day() << ' '
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<< pd.month().as_short_string() ;
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return os;
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}
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//! operator<< for gregorian::nth_kday_of_month. Output: "first Mon of Jun"
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template <class charT, class traits>
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inline
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std::basic_ostream<charT, traits>&
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operator<<(std::basic_ostream<charT, traits>& os,
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const nth_kday_of_month& nkd)
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{
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os << nkd.nth_week_as_str() << ' '
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<< nkd.day_of_week() << " of "
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<< nkd.month().as_short_string() ;
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return os;
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}
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//! operator<< for gregorian::first_kday_of_month. Output: "first Mon of Jun"
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template <class charT, class traits>
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inline
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std::basic_ostream<charT, traits>&
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operator<<(std::basic_ostream<charT, traits>& os,
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const first_kday_of_month& fkd)
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{
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os << "first " << fkd.day_of_week() << " of "
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<< fkd.month().as_short_string() ;
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return os;
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}
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//! operator<< for gregorian::last_kday_of_month. Output: "last Mon of Jun"
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template <class charT, class traits>
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inline
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std::basic_ostream<charT, traits>&
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operator<<(std::basic_ostream<charT, traits>& os,
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const last_kday_of_month& lkd)
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{
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os << "last " << lkd.day_of_week() << " of "
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<< lkd.month().as_short_string() ;
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return os;
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}
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//! operator<< for gregorian::first_kday_after. Output: "first Mon after"
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template <class charT, class traits>
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inline
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std::basic_ostream<charT, traits>&
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operator<<(std::basic_ostream<charT, traits>& os,
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const first_kday_after& fka)
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{
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os << fka.day_of_week() << " after";
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return os;
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}
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//! operator<< for gregorian::first_kday_before. Output: "first Mon before"
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template <class charT, class traits>
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inline
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std::basic_ostream<charT, traits>&
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operator<<(std::basic_ostream<charT, traits>& os,
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const first_kday_before& fkb)
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{
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os << fkb.day_of_week() << " before";
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return os;
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}
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#endif // USE_DATE_TIME_PRE_1_33_FACET_IO
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/**************** Input Streaming ******************/
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#if !defined(BOOST_NO_STD_ITERATOR_TRAITS)
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//! operator>> for gregorian::date
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template<class charT>
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inline
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std::basic_istream<charT>& operator>>(std::basic_istream<charT>& is, date& d)
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{
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std::istream_iterator<std::basic_string<charT>, charT> beg(is), eos;
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typedef boost::date_time::all_date_names_put<greg_facet_config, charT> facet_def;
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d = from_stream(beg, eos);
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return is;
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}
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#endif // BOOST_NO_STD_ITERATOR_TRAITS
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//! operator>> for gregorian::date_duration
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template<class charT>
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inline
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std::basic_istream<charT>& operator>>(std::basic_istream<charT>& is,
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date_duration& dd)
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{
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long v;
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is >> v;
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dd = date_duration(v);
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return is;
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}
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//! operator>> for gregorian::date_period
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template<class charT>
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inline
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std::basic_istream<charT>& operator>>(std::basic_istream<charT>& is,
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date_period& dp)
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{
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std::basic_string<charT> s;
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is >> s;
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dp = date_time::from_simple_string_type<date>(s);
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return is;
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}
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//! generates a locale with the set of gregorian name-strings of type char*
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BOOST_DATE_TIME_DECL std::locale generate_locale(std::locale& loc, char type);
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//! Returns a pointer to a facet with a default set of names (English)
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/* Necessary in the event an exception is thrown from op>> for
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* weekday or month. See comments in those functions for more info */
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BOOST_DATE_TIME_DECL boost::date_time::all_date_names_put<greg_facet_config, char>* create_facet_def(char type);
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#ifndef BOOST_NO_STD_WSTRING
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//! generates a locale with the set of gregorian name-strings of type wchar_t*
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BOOST_DATE_TIME_DECL std::locale generate_locale(std::locale& loc, wchar_t type);
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//! Returns a pointer to a facet with a default set of names (English)
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/* Necessary in the event an exception is thrown from op>> for
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* weekday or month. See comments in those functions for more info */
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BOOST_DATE_TIME_DECL boost::date_time::all_date_names_put<greg_facet_config, wchar_t>* create_facet_def(wchar_t type);
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#endif // BOOST_NO_STD_WSTRING
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//! operator>> for gregorian::greg_month - throws exception if invalid month given
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template<class charT>
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inline
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std::basic_istream<charT>& operator>>(std::basic_istream<charT>& is,greg_month& m)
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{
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typedef boost::date_time::all_date_names_put<greg_facet_config, charT> facet_def;
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std::basic_string<charT> s;
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is >> s;
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if(!std::has_facet<facet_def>(is.getloc())) {
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std::locale loc = is.getloc();
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charT a = '\0';
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is.imbue(generate_locale(loc, a));
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}
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short num = 0;
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try{
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const facet_def& f = std::use_facet<facet_def>(is.getloc());
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num = date_time::find_match(f.get_short_month_names(),
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f.get_long_month_names(),
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(greg_month::max)(), s); // greg_month spans 1..12, so max returns the array size,
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// which is needed by find_match
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}
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/* bad_cast will be thrown if the desired facet is not accessible
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* so we can generate the facet. This has the drawback of using english
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* names as a default. */
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catch(std::bad_cast&){
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charT a = '\0';
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std::auto_ptr< const facet_def > f(create_facet_def(a));
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num = date_time::find_match(f->get_short_month_names(),
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f->get_long_month_names(),
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(greg_month::max)(), s); // greg_month spans 1..12, so max returns the array size,
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// which is needed by find_match
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}
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++num; // months numbered 1-12
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m = greg_month(num);
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return is;
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}
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//! operator>> for gregorian::greg_weekday - throws exception if invalid weekday given
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template<class charT>
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inline
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std::basic_istream<charT>& operator>>(std::basic_istream<charT>& is,greg_weekday& wd)
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{
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typedef boost::date_time::all_date_names_put<greg_facet_config, charT> facet_def;
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std::basic_string<charT> s;
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is >> s;
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if(!std::has_facet<facet_def>(is.getloc())) {
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std::locale loc = is.getloc();
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charT a = '\0';
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is.imbue(generate_locale(loc, a));
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}
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short num = 0;
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try{
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const facet_def& f = std::use_facet<facet_def>(is.getloc());
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num = date_time::find_match(f.get_short_weekday_names(),
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f.get_long_weekday_names(),
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(greg_weekday::max)() + 1, s); // greg_weekday spans 0..6, so increment is needed
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// to form the array size which is needed by find_match
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}
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/* bad_cast will be thrown if the desired facet is not accessible
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* so we can generate the facet. This has the drawback of using english
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* names as a default. */
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catch(std::bad_cast&){
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charT a = '\0';
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std::auto_ptr< const facet_def > f(create_facet_def(a));
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num = date_time::find_match(f->get_short_weekday_names(),
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f->get_long_weekday_names(),
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(greg_weekday::max)() + 1, s); // greg_weekday spans 0..6, so increment is needed
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// to form the array size which is needed by find_match
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}
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wd = greg_weekday(num); // weekdays numbered 0-6
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return is;
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}
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} } //namespace gregorian
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#endif
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#endif
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