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#ifndef DATE_TIME_DATE_FORMATTING_HPP___
#define DATE_TIME_DATE_FORMATTING_HPP___
/* Copyright (c) 2002-2004 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: 2012-09-30 16:25:22 -0700 (Sun, 30 Sep 2012) $
*/
#include "boost/date_time/iso_format.hpp"
#include "boost/date_time/compiler_config.hpp"
#include <string>
#include <sstream>
#include <iomanip>
/* NOTE: "formatter" code for older compilers, ones that define
* BOOST_DATE_TIME_INCLUDE_LIMITED_HEADERS, is located in
* date_formatting_limited.hpp
*/
namespace boost {
namespace date_time {
//! Formats a month as as string into an ostream
template<class month_type, class format_type, class charT=char>
class month_formatter
{
typedef std::basic_ostream<charT> ostream_type;
public:
//! Formats a month as as string into an ostream
/*! This function demands that month_type provide
* functions for converting to short and long strings
* if that capability is used.
*/
static ostream_type& format_month(const month_type& month,
ostream_type &os)
{
switch (format_type::month_format())
{
case month_as_short_string:
{
os << month.as_short_string();
break;
}
case month_as_long_string:
{
os << month.as_long_string();
break;
}
case month_as_integer:
{
os << std::setw(2) << std::setfill(os.widen('0')) << month.as_number();
break;
}
default:
break;
}
return os;
} // format_month
};
//! Convert ymd to a standard string formatting policies
template<class ymd_type, class format_type, class charT=char>
class ymd_formatter
{
public:
//! Convert ymd to a standard string formatting policies
/*! This is standard code for handling date formatting with
* year-month-day based date information. This function
* uses the format_type to control whether the string will
* contain separator characters, and if so what the character
* will be. In addtion, it can format the month as either
* an integer or a string as controled by the formatting
* policy
*/
static std::basic_string<charT> ymd_to_string(ymd_type ymd)
{
typedef typename ymd_type::month_type month_type;
std::basic_ostringstream<charT> ss;
// Temporarily switch to classic locale to prevent possible formatting
// of year with comma or other character (for example 2,008).
ss.imbue(std::locale::classic());
ss << ymd.year;
ss.imbue(std::locale());
if (format_type::has_date_sep_chars()) {
ss << format_type::month_sep_char();
}
//this name is a bit ugly, oh well....
month_formatter<month_type,format_type,charT>::format_month(ymd.month, ss);
if (format_type::has_date_sep_chars()) {
ss << format_type::day_sep_char();
}
ss << std::setw(2) << std::setfill(ss.widen('0'))
<< ymd.day;
return ss.str();
}
};
//! Convert a date to string using format policies
template<class date_type, class format_type, class charT=char>
class date_formatter
{
public:
typedef std::basic_string<charT> string_type;
//! Convert to a date to standard string using format policies
static string_type date_to_string(date_type d)
{
typedef typename date_type::ymd_type ymd_type;
if (d.is_not_a_date()) {
return string_type(format_type::not_a_date());
}
if (d.is_neg_infinity()) {
return string_type(format_type::neg_infinity());
}
if (d.is_pos_infinity()) {
return string_type(format_type::pos_infinity());
}
ymd_type ymd = d.year_month_day();
return ymd_formatter<ymd_type, format_type, charT>::ymd_to_string(ymd);
}
};
} } //namespace date_time
#endif
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