#ifndef DATE_TIME_STRINGS_FROM_FACET__HPP___ #define DATE_TIME_STRINGS_FROM_FACET__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 * $Date$ */ #include <sstream> #include <string> #include <vector> #include <locale> namespace boost { namespace date_time { //! This function gathers up all the month strings from a std::locale /*! Using the time_put facet, this function creates a collection of * all the month strings from a locale. This is handy when building * custom date parsers or formatters that need to be localized. * *@param charT The type of char to use when gathering typically char * or wchar_t. *@param locale The locale to use when gathering the strings *@param short_strings True(default) to gather short strings, * false for long strings. *@return A vector of strings containing the strings in order. eg: * Jan, Feb, Mar, etc. */ template<typename charT> std::vector<std::basic_string<charT> > gather_month_strings(const std::locale& locale, bool short_strings=true) { typedef std::basic_string<charT> string_type; typedef std::vector<string_type> collection_type; typedef std::ostreambuf_iterator<charT> ostream_iter_type; typedef std::basic_ostringstream<charT> stringstream_type; typedef std::time_put<charT> time_put_facet_type; charT short_fmt[3] = { '%', 'b' }; charT long_fmt[3] = { '%', 'B' }; collection_type months; string_type outfmt(short_fmt); if (!short_strings) { outfmt = long_fmt; } { //grab the needed strings by using the locale to //output each month const charT* p_outfmt = outfmt.c_str(), *p_outfmt_end = p_outfmt + outfmt.size(); tm tm_value; memset(&tm_value, 0, sizeof(tm_value)); for (int m=0; m < 12; m++) { tm_value.tm_mon = m; stringstream_type ss; ostream_iter_type oitr(ss); std::use_facet<time_put_facet_type>(locale).put(oitr, ss, ss.fill(), &tm_value, p_outfmt, p_outfmt_end); months.push_back(ss.str()); } } return months; } //! This function gathers up all the weekday strings from a std::locale /*! Using the time_put facet, this function creates a collection of * all the weekday strings from a locale starting with the string for * 'Sunday'. This is handy when building custom date parsers or * formatters that need to be localized. * *@param charT The type of char to use when gathering typically char * or wchar_t. *@param locale The locale to use when gathering the strings *@param short_strings True(default) to gather short strings, * false for long strings. *@return A vector of strings containing the weekdays in order. eg: * Sun, Mon, Tue, Wed, Thu, Fri, Sat */ template<typename charT> std::vector<std::basic_string<charT> > gather_weekday_strings(const std::locale& locale, bool short_strings=true) { typedef std::basic_string<charT> string_type; typedef std::vector<string_type> collection_type; typedef std::ostreambuf_iterator<charT> ostream_iter_type; typedef std::basic_ostringstream<charT> stringstream_type; typedef std::time_put<charT> time_put_facet_type; charT short_fmt[3] = { '%', 'a' }; charT long_fmt[3] = { '%', 'A' }; collection_type weekdays; string_type outfmt(short_fmt); if (!short_strings) { outfmt = long_fmt; } { //grab the needed strings by using the locale to //output each month / weekday const charT* p_outfmt = outfmt.c_str(), *p_outfmt_end = p_outfmt + outfmt.size(); tm tm_value; memset(&tm_value, 0, sizeof(tm_value)); for (int i=0; i < 7; i++) { tm_value.tm_wday = i; stringstream_type ss; ostream_iter_type oitr(ss); std::use_facet<time_put_facet_type>(locale).put(oitr, ss, ss.fill(), &tm_value, p_outfmt, p_outfmt_end); weekdays.push_back(ss.str()); } } return weekdays; } } } //namespace #endif