#ifndef BOOST_DATE_TIME_LOCAL_TIME_IO_HPP__

#define BOOST_DATE_TIME_LOCAL_TIME_IO_HPP__



/* Copyright (c) 2003-2004 CrystalClear Software, Inc.

 * 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: 2008-02-27 15:00:24 -0500 (Wed, 27 Feb 2008) $

 */



#include <iostream>

#include "boost/date_time/local_time/local_date_time.hpp"

#include "boost/date_time/local_time/posix_time_zone.hpp"

#include "boost/date_time/time_facet.hpp"

#include "boost/date_time/string_convert.hpp"

#include "boost/io/ios_state.hpp"



namespace boost {

namespace local_time {



  typedef boost::date_time::time_facet<local_date_time, wchar_t> wlocal_time_facet;

  typedef boost::date_time::time_facet<local_date_time, char>     local_time_facet;



  typedef boost::date_time::time_input_facet<local_date_time::utc_time_type,wchar_t> wlocal_time_input_facet;

  typedef boost::date_time::time_input_facet<local_date_time::utc_time_type,char>     local_time_input_facet;

  

  //! operator<< for local_date_time - see local_time docs for formatting details

  template<class CharT, class TraitsT>

  inline

  std::basic_ostream<CharT, TraitsT>&

  operator<<(std::basic_ostream<CharT, TraitsT>& os, const local_date_time& ldt)

  {

    boost::io::ios_flags_saver iflags(os);

    typedef local_date_time time_type;//::utc_time_type typename 

    typedef date_time::time_facet<time_type, CharT> custom_time_facet;

    typedef std::time_put<CharT> std_time_facet;

    std::ostreambuf_iterator<CharT> oitr(os);

    

    if(std::has_facet<custom_time_facet>(os.getloc())) {

      std::use_facet<custom_time_facet>(os.getloc()).put(oitr, 

                                                         os, 

                                                         os.fill(), 

                                                         ldt);

    }

    else {

      custom_time_facet* f = new custom_time_facet();

      std::locale l = std::locale(os.getloc(), f);

      os.imbue(l);

      f->put(oitr, os, os.fill(), ldt);

    }



    return os;

  }





  //! input operator for local_date_time

  template <class CharT, class Traits>

  inline

  std::basic_istream<CharT, Traits>&

  operator>>(std::basic_istream<CharT, Traits>& is, local_date_time& ldt)

  {

    boost::io::ios_flags_saver iflags(is);

    typename std::basic_istream<CharT, Traits>::sentry strm_sentry(is, false); 

    if (strm_sentry) {

      try {

        typedef typename local_date_time::utc_time_type utc_time_type;

        typedef typename date_time::time_input_facet<utc_time_type, CharT> time_input_facet;



        // intermediate objects

        std::basic_string<CharT> tz_str;

        utc_time_type pt(not_a_date_time); 

        

        std::istreambuf_iterator<CharT,Traits> sit(is), str_end;

        if(std::has_facet<time_input_facet>(is.getloc())) {

          std::use_facet<time_input_facet>(is.getloc()).get_local_time(sit, str_end, is, pt, tz_str);

        }

        else {

          time_input_facet* f = new time_input_facet();

          std::locale l = std::locale(is.getloc(), f);

          is.imbue(l);

          f->get_local_time(sit, str_end, is, pt, tz_str);

        }

        if(tz_str.empty()) {

          time_zone_ptr null_ptr;

          // a null time_zone_ptr creates a local_date_time that is UTC

          ldt = local_date_time(pt, null_ptr);

        }

        else {

          time_zone_ptr tz_ptr(new posix_time_zone(date_time::convert_string_type<CharT,char>(tz_str)));

          // the "date & time" constructor expects the time label to *not* be utc.

          // a posix_tz_string also expects the time label to *not* be utc.

          ldt = local_date_time(pt.date(), pt.time_of_day(), tz_ptr, local_date_time::EXCEPTION_ON_ERROR);

        }

      }

      catch(...) { 

        // mask tells us what exceptions are turned on

        std::ios_base::iostate exception_mask = is.exceptions();

        // if the user wants exceptions on failbit, we'll rethrow our 

        // date_time exception & set the failbit

        if(std::ios_base::failbit & exception_mask) {

          try { is.setstate(std::ios_base::failbit); } 

          catch(std::ios_base::failure&) {} // ignore this one

          throw; // rethrow original exception

        }

        else {

          // if the user want's to fail quietly, we simply set the failbit

          is.setstate(std::ios_base::failbit); 

        } 

            

      }

    }

    return is;

  }



  

} } // namespaces



#endif // BOOST_DATE_TIME_LOCAL_TIME_IO_HPP__

