#ifndef _GREGORIAN__CONVERSION_HPP___
#define _GREGORIAN__CONVERSION_HPP___
/* Copyright (c) 2004-2005 CrystalClear Software, Inc.
* Use, modification and distribution is subject to the
* Boost Software License, Version 1.0. (See accompanying
* file LICENSE-1.0 or http://www.boost.org/LICENSE-1.0)
* Author: Jeff Garland, Bart Garst
* $Date: 2005/05/25 14:15:41 $
*/
#include <exception>
#include "boost/date_time/gregorian/gregorian_types.hpp"
#include "boost/date_time/c_time.hpp"
#if defined(USE_DATE_TIME_PRE_1_33_FACET_IO)
# if defined(BOOST_DATE_TIME_INCLUDE_LIMITED_HEADERS)
# include "boost/date_time/gregorian/formatters_limited.hpp"
# else
# include "boost/date_time/gregorian/formatters.hpp"
# endif // BOOST_DATE_TIME_INCLUDE_LIMITED_HEADERS
#else
# include <sstream>
# include "boost/date_time/gregorian/gregorian_io.hpp"
#endif // USE_DATE_TIME_PRE_1_33_FACET_IO
namespace boost {
namespace gregorian {
//! Converts a date to a tm struct. Throws out_of_range exception if date is a special value
inline
tm to_tm(const date& d)
{
if(d.is_pos_infinity() || d.is_neg_infinity() || d.is_not_a_date()){
#if defined(USE_DATE_TIME_PRE_1_33_FACET_IO)
std::string s("tm unable to handle date value of " + to_simple_string(d));
throw std::out_of_range(s);
#else
std::stringstream ss;
ss << "tm unable to handle date value of " << d;
throw std::out_of_range(ss.str());
#endif // USE_DATE_TIME_PRE_1_33_FACET_IO
}
tm datetm;
boost::gregorian::date::ymd_type ymd = d.year_month_day();
datetm.tm_year = ymd.year-1900;
datetm.tm_mon = ymd.month-1;
datetm.tm_mday = ymd.day;
datetm.tm_wday = d.day_of_week();
datetm.tm_yday = d.day_of_year()-1;
datetm.tm_hour = datetm.tm_min = datetm.tm_sec = 0;
datetm.tm_isdst = -1; // negative because not enough info to set tm_isdst
return datetm;
}
//! Converts a tm structure into a date dropping the any time values.
inline
date date_from_tm(const tm& datetm)
{
return date(static_cast<unsigned short>(datetm.tm_year+1900),
static_cast<unsigned short>(datetm.tm_mon+1),
static_cast<unsigned short>(datetm.tm_mday));
}
} } //namespace boost::gregorian
#endif