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133 lines
4.0 KiB
133 lines
4.0 KiB
#ifndef DATE_TIME_DATE_FORMATTING_HPP___ |
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#define DATE_TIME_DATE_FORMATTING_HPP___ |
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/* Copyright (c) 2002-2004 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: 2011-11-13 01:10:55 -0500 (Sun, 13 Nov 2011) $ |
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*/ |
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#include "boost/date_time/iso_format.hpp" |
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#include "boost/date_time/compiler_config.hpp" |
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#include <string> |
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#include <sstream> |
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#include <iomanip> |
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/* NOTE: "formatter" code for older compilers, ones that define |
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* BOOST_DATE_TIME_INCLUDE_LIMITED_HEADERS, is located in |
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* date_formatting_limited.hpp |
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*/ |
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namespace boost { |
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namespace date_time { |
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//! Formats a month as as string into an ostream |
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template<class month_type, class format_type, class charT=char> |
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class month_formatter |
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{ |
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typedef std::basic_ostream<charT> ostream_type; |
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public: |
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//! Formats a month as as string into an ostream |
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/*! This function demands that month_type provide |
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* functions for converting to short and long strings |
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* if that capability is used. |
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*/ |
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static ostream_type& format_month(const month_type& month, |
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ostream_type &os) |
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{ |
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switch (format_type::month_format()) |
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{ |
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case month_as_short_string: |
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{ |
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os << month.as_short_string(); |
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break; |
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} |
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case month_as_long_string: |
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{ |
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os << month.as_long_string(); |
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break; |
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} |
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case month_as_integer: |
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{ |
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os << std::setw(2) << std::setfill(os.widen('0')) << month.as_number(); |
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break; |
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} |
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} |
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return os; |
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} // format_month |
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}; |
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//! Convert ymd to a standard string formatting policies |
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template<class ymd_type, class format_type, class charT=char> |
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class ymd_formatter |
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{ |
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public: |
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//! Convert ymd to a standard string formatting policies |
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/*! This is standard code for handling date formatting with |
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* year-month-day based date information. This function |
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* uses the format_type to control whether the string will |
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* contain separator characters, and if so what the character |
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* will be. In addtion, it can format the month as either |
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* an integer or a string as controled by the formatting |
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* policy |
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*/ |
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static std::basic_string<charT> ymd_to_string(ymd_type ymd) |
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{ |
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typedef typename ymd_type::month_type month_type; |
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std::basic_ostringstream<charT> ss; |
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// Temporarily switch to classic locale to prevent possible formatting |
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// of year with comma or other character (for example 2,008). |
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ss.imbue(std::locale::classic()); |
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ss << ymd.year; |
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ss.imbue(std::locale()); |
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if (format_type::has_date_sep_chars()) { |
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ss << format_type::month_sep_char(); |
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} |
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//this name is a bit ugly, oh well.... |
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month_formatter<month_type,format_type,charT>::format_month(ymd.month, ss); |
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if (format_type::has_date_sep_chars()) { |
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ss << format_type::day_sep_char(); |
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} |
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ss << std::setw(2) << std::setfill(ss.widen('0')) |
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<< ymd.day; |
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return ss.str(); |
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} |
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}; |
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//! Convert a date to string using format policies |
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template<class date_type, class format_type, class charT=char> |
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class date_formatter |
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{ |
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public: |
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typedef std::basic_string<charT> string_type; |
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//! Convert to a date to standard string using format policies |
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static string_type date_to_string(date_type d) |
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{ |
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typedef typename date_type::ymd_type ymd_type; |
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if (d.is_not_a_date()) { |
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return string_type(format_type::not_a_date()); |
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} |
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if (d.is_neg_infinity()) { |
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return string_type(format_type::neg_infinity()); |
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} |
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if (d.is_pos_infinity()) { |
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return string_type(format_type::pos_infinity()); |
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} |
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ymd_type ymd = d.year_month_day(); |
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return ymd_formatter<ymd_type, format_type, charT>::ymd_to_string(ymd); |
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} |
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}; |
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} } //namespace date_time |
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#endif |
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