boost/date_time/date_generator_formatter.hpp
#ifndef _DATE_TIME_DATE_GENERATOR_FORMATTER__HPP___ #define _DATE_TIME_DATE_GENERATOR_FORMATTER__HPP___ /* Copyright (c) 2004 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 * $Date$ */ #include <iostream> #include <string> #include <vector> #include <algorithm> #include "boost/date_time/date_generators.hpp" namespace boost { namespace date_time { //! Formats date_generators for output /*! Formatting of date_generators follows specific orders for the * various types of date_generators. * - partial_date => "dd Month" * - nth_day_of_the_week_in_month => "nth weekday of month" * - first_day_of_the_week_in_month => "first weekday of month" * - last_day_of_the_week_in_month => "last weekday of month" * - first_day_of_the_week_after => "weekday after" * - first_day_of_the_week_before => "weekday before" * While the order of the elements in these phrases cannot be changed, * the elements themselves can be. Weekday and Month get their formats * and names from the date_facet. The remaining elements are stored in * the date_generator_formatter and can be customized upon construction * or via a member function. The default elements are those shown in the * examples above. */ template <class date_type, class CharT, class OutItrT = std::ostreambuf_iterator<CharT, std::char_traits<CharT> > > class date_generator_formatter { public: 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; typedef CharT char_type; typedef std::basic_string<char_type> string_type; typedef std::vector<string_type> collection_type; static const char_type first_string[6]; static const char_type second_string[7]; static const char_type third_string[6]; static const char_type fourth_string[7]; static const char_type fifth_string[6]; static const char_type last_string[5]; static const char_type before_string[8]; static const char_type after_string[6]; static const char_type of_string[3]; enum phrase_elements {first=0, second, third, fourth, fifth, last, before, after, of, number_of_phrase_elements}; //! Default format elements used date_generator_formatter() { phrase_strings.reserve(number_of_phrase_elements); phrase_strings.push_back(string_type(first_string)); phrase_strings.push_back(string_type(second_string)); phrase_strings.push_back(string_type(third_string)); phrase_strings.push_back(string_type(fourth_string)); phrase_strings.push_back(string_type(fifth_string)); phrase_strings.push_back(string_type(last_string)); phrase_strings.push_back(string_type(before_string)); phrase_strings.push_back(string_type(after_string)); phrase_strings.push_back(string_type(of_string)); } //! Constructor that allows for a custom set of phrase elements date_generator_formatter(const string_type& first_str, const string_type& second_str, const string_type& third_str, const string_type& fourth_str, const string_type& fifth_str, const string_type& last_str, const string_type& before_str, const string_type& after_str, const string_type& of_str) { phrase_strings.reserve(number_of_phrase_elements); phrase_strings.push_back(first_str); phrase_strings.push_back(second_str); phrase_strings.push_back(third_str); phrase_strings.push_back(fourth_str); phrase_strings.push_back(fifth_str); phrase_strings.push_back(last_str); phrase_strings.push_back(before_str); phrase_strings.push_back(after_str); phrase_strings.push_back(of_str); } //! Replace the set of phrase elements with those contained in new_strings /*! The order of the strings in the given collection is important. * They must follow: * - first, second, third, fourth, fifth, last, before, after, of. * * It is not necessary to send in a complete set if only a few * elements are to be replaced as long as the correct beg_pos is used. * * Ex: To keep the default first through fifth elements, but replace * the rest with a collection of: * - "final", "prior", "following", "in". * The beg_pos of date_generator_formatter::last would be used. */ void elements(const collection_type& new_strings, phrase_elements beg_pos=first) { if(beg_pos < number_of_phrase_elements) { typename collection_type::iterator itr = phrase_strings.begin(); itr += beg_pos; std::copy(new_strings.begin(), new_strings.end(), itr); //phrase_strings.begin()); } } //!Put a partial_date => "dd Month" template<class facet_type> OutItrT put_partial_date(OutItrT next, std::ios_base& a_ios, CharT a_fill, const partial_date_type& pd, const facet_type& facet) const { facet.put(next, a_ios, a_fill, pd.day()); next = a_fill; //TODO change this ??? facet.put(next, a_ios, a_fill, pd.month()); return next; } //! Put an nth_day_of_the_week_in_month => "nth weekday of month" template<class facet_type> OutItrT put_nth_kday(OutItrT next, std::ios_base& a_ios, CharT a_fill, const nth_kday_type& nkd, const facet_type& facet) const { put_string(next, phrase_strings[nkd.nth_week() -1]); next = a_fill; //TODO change this ??? facet.put(next, a_ios, a_fill, nkd.day_of_week()); next = a_fill; //TODO change this ??? put_string(next, string_type(of_string)); next = a_fill; //TODO change this ??? facet.put(next, a_ios, a_fill, nkd.month()); return next; } //! Put a first_day_of_the_week_in_month => "first weekday of month" template<class facet_type> OutItrT put_first_kday(OutItrT next, std::ios_base& a_ios, CharT a_fill, const first_kday_type& fkd, const facet_type& facet) const { put_string(next, phrase_strings[first]); next = a_fill; //TODO change this ??? facet.put(next, a_ios, a_fill, fkd.day_of_week()); next = a_fill; //TODO change this ??? put_string(next, string_type(of_string)); next = a_fill; //TODO change this ??? facet.put(next, a_ios, a_fill, fkd.month()); return next; } //! Put a last_day_of_the_week_in_month => "last weekday of month" template<class facet_type> OutItrT put_last_kday(OutItrT next, std::ios_base& a_ios, CharT a_fill, const last_kday_type& lkd, const facet_type& facet) const { put_string(next, phrase_strings[last]); next = a_fill; //TODO change this ??? facet.put(next, a_ios, a_fill, lkd.day_of_week()); next = a_fill; //TODO change this ??? put_string(next, string_type(of_string)); next = a_fill; //TODO change this ??? facet.put(next, a_ios, a_fill, lkd.month()); return next; } //! Put a first_day_of_the_week_before => "weekday before" template<class facet_type> OutItrT put_kday_before(OutItrT next, std::ios_base& a_ios, CharT a_fill, const kday_before_type& fkb, const facet_type& facet) const { facet.put(next, a_ios, a_fill, fkb.day_of_week()); next = a_fill; //TODO change this ??? put_string(next, phrase_strings[before]); return next; } //! Put a first_day_of_the_week_after => "weekday after" template<class facet_type> OutItrT put_kday_after(OutItrT next, std::ios_base& a_ios, CharT a_fill, const kday_after_type& fka, const facet_type& facet) const { facet.put(next, a_ios, a_fill, fka.day_of_week()); next = a_fill; //TODO change this ??? put_string(next, phrase_strings[after]); return next; } private: collection_type phrase_strings; //! helper function to put the various member string into stream OutItrT put_string(OutItrT next, const string_type& str) const { typename string_type::const_iterator itr = str.begin(); while(itr != str.end()) { *next = *itr; ++itr; ++next; } return next; } }; template<class date_type, class CharT, class OutItrT> const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type date_generator_formatter<date_type, CharT, OutItrT>::first_string[6] = {'f','i','r','s','t'}; template<class date_type, class CharT, class OutItrT> const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type date_generator_formatter<date_type, CharT, OutItrT>::second_string[7] = {'s','e','c','o','n','d'}; template<class date_type, class CharT, class OutItrT> const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type date_generator_formatter<date_type, CharT, OutItrT>::third_string[6] = {'t','h','i','r','d'}; template<class date_type, class CharT, class OutItrT> const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type date_generator_formatter<date_type, CharT, OutItrT>::fourth_string[7] = {'f','o','u','r','t','h'}; template<class date_type, class CharT, class OutItrT> const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type date_generator_formatter<date_type, CharT, OutItrT>::fifth_string[6] = {'f','i','f','t','h'}; template<class date_type, class CharT, class OutItrT> const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type date_generator_formatter<date_type, CharT, OutItrT>::last_string[5] = {'l','a','s','t'}; template<class date_type, class CharT, class OutItrT> const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type date_generator_formatter<date_type, CharT, OutItrT>::before_string[8] = {'b','e','f','o','r','e'}; template<class date_type, class CharT, class OutItrT> const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type date_generator_formatter<date_type, CharT, OutItrT>::after_string[6] = {'a','f','t','e','r'}; template<class date_type, class CharT, class OutItrT> const typename date_generator_formatter<date_type, CharT, OutItrT>::char_type date_generator_formatter<date_type, CharT, OutItrT>::of_string[3] = {'o','f'}; } } // namespaces #endif // _DATE_TIME_DATE_GENERATOR_FORMATTER__HPP___