122 lines
3.4 KiB
C++
122 lines
3.4 KiB
C++
#ifndef DATE_TIME_DATE_FORMATTING_LIMITED_HPP___
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#define DATE_TIME_DATE_FORMATTING_LIMITED_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: 2008-02-27 12:00:24 -0800 (Wed, 27 Feb 2008) $
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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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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>
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class month_formatter
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{
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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 std::ostream& format_month(const month_type& month,
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std::ostream& 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('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>
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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::string 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::ostringstream ss;
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ss << ymd.year;
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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>::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('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>
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class date_formatter
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{
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public:
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//! Convert to a date to standard string using format policies
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static std::string 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 format_type::not_a_date();
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}
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if (d.is_neg_infinity()) {
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return format_type::neg_infinity();
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}
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if (d.is_pos_infinity()) {
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return 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>::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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