#ifndef ISO_FORMAT_HPP___

#define ISO_FORMAT_HPP___

/* Copyright (c) 2002,2003 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: 2008-02-27 15:00:24 -0500 (Wed, 27 Feb 2008) $

 */

#include "boost/date_time/parse_format_base.hpp"

namespace boost {

namespace date_time {

//! Class to provide common iso formatting spec

template<class charT>

class iso_format_base {

public:

  //! Describe month format -- its an integer in iso format

  static month_format_spec month_format()

  {

    return month_as_integer;

  }

  //! String used printed is date is invalid

  static const charT* not_a_date()

  {     

    return "not-a-date-time";

  }

  //! String used to for positive infinity value

  static const charT* pos_infinity()

  {

    return "+infinity";

  }

  //! String used to for positive infinity value

  static const charT* neg_infinity()

  {

    return "-infinity";

  }

  //! ISO char for a year -- used in durations

  static charT year_sep_char()

  {

    return 'Y';

  }

  //! ISO char for a month

  static charT month_sep_char()

  {

    return '-';

  }

  //! ISO char for a day

  static charT day_sep_char()

  {

    return '-';

  }

  //! char for minute

  static charT hour_sep_char()

  {

    return ':';

  }

  //! char for minute

  static charT minute_sep_char()

  {

    return ':';

  }

  //! char for second

  static charT second_sep_char()

  {

    return ':';

  }

  //! ISO char for a period

  static charT period_start_char()

  {

    return 'P';

  }

  //! Used in time in mixed strings to set start of time

  static charT time_start_char()

  {

    return 'T';

  }

  //! Used in mixed strings to identify start of a week number

  static charT week_start_char()

  {

    return 'W';

  }

  //! Separators for periods

  static charT period_sep_char()

  {

    return '/';

  }

  //! Separator for hh:mm:ss

  static charT time_sep_char()

  {

    return ':';

  }

  //! Preferred Separator for hh:mm:ss,decimal_fraction

  static charT fractional_time_sep_char()

  {

    return ',';

  }

  static bool is_component_sep(charT sep)

  {

    switch(sep) {

    case 'H':

    case 'M':

    case 'S':

    case 'W':

    case 'T':

    case 'Y':

    case 'D':return true;

    default:

      return false;

    }

  }

  static bool is_fractional_time_sep(charT sep)

  {

    switch(sep) {

    case ',':

    case '.': return true;

    default: return false;

    }

  }

  static bool is_timezone_sep(charT sep)

  {

    switch(sep) {

    case '+':

    case '-': return true;

    default: return false;

    }

  }

  static charT element_sep_char()

  {

    return '-';

  }

};

#ifndef BOOST_NO_STD_WSTRING

//! Class to provide common iso formatting spec

template<>

class iso_format_base<wchar_t> {

public:

  //! Describe month format -- its an integer in iso format

  static month_format_spec month_format()

  {

    return month_as_integer;

  }

  //! String used printed is date is invalid

  static const wchar_t* not_a_date()

  {      

    return L"not-a-date-time";

  }

  //! String used to for positive infinity value

  static const wchar_t* pos_infinity()

  {

    return L"+infinity";

  }

  //! String used to for positive infinity value

  static const wchar_t* neg_infinity()

  {

    return L"-infinity";

  }

  //! ISO char for a year -- used in durations

  static wchar_t year_sep_char()

  {

    return 'Y';

  }

  //! ISO char for a month

  static wchar_t month_sep_char()

  {

    return '-';

  }

  //! ISO char for a day

  static wchar_t day_sep_char()

  {

    return '-';

  }

  //! char for minute

  static wchar_t hour_sep_char()

  {

    return ':';

  }

  //! char for minute

  static wchar_t minute_sep_char()

  {

    return ':';

  }

  //! char for second

  static wchar_t second_sep_char()

  {

    return ':';

  }

  //! ISO char for a period

  static wchar_t period_start_char()

  {

    return 'P';

  }

  //! Used in time in mixed strings to set start of time

  static wchar_t time_start_char()

  {

    return 'T';

  }

  //! Used in mixed strings to identify start of a week number

  static wchar_t week_start_char()

  {

    return 'W';

  }

  //! Separators for periods

  static wchar_t period_sep_char()

  {

    return '/';

  }

  //! Separator for hh:mm:ss

  static wchar_t time_sep_char()

  {

    return ':';

  }

  //! Preferred Separator for hh:mm:ss,decimal_fraction

  static wchar_t fractional_time_sep_char()

  {

    return ',';

  }

  static bool is_component_sep(wchar_t sep)

  {

    switch(sep) {

    case 'H':

    case 'M':

    case 'S':

    case 'W':

    case 'T':

    case 'Y':

    case 'D':return true;

    default:

      return false;

    }

  }

  static bool is_fractional_time_sep(wchar_t sep)

  {

    switch(sep) {

    case ',':

    case '.': return true;

    default: return false;

    }

  }

  static bool is_timezone_sep(wchar_t sep)

  {

    switch(sep) {

    case '+':

    case '-': return true;

    default: return false;

    }

  }

  static wchar_t element_sep_char()

  {

    return '-';

  }

};

#endif // BOOST_NO_STD_WSTRING

//! Format description for iso normal YYYYMMDD

template<class charT>

class iso_format : public iso_format_base<charT> {

public:

  //! The ios standard format doesn't use char separators

  static bool has_date_sep_chars()

  {

    return false;

  }

};

//! Extended format uses seperators YYYY-MM-DD

template<class charT>

class iso_extended_format : public iso_format_base<charT> {

public:

  //! Extended format needs char separators

  static bool has_date_sep_chars()

  {

    return true;

  }

};

} } //namespace date_time

#endif