third_party/boost/include/boost/date_time/date_generator_parser.hpp - webm/webmlive - Git at Google


 #ifndef DATE_TIME_DATE_GENERATOR_PARSER_HPP__
 #define DATE_TIME_DATE_GENERATOR_PARSER_HPP__

 /* Copyright (c) 2005 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: 2008-11-12 14:37:53 -0500 (Wed, 12 Nov 2008) $
  */

 #include <string>
 #include <vector>
 #include <iterator> // istreambuf_iterator
 #include <boost/throw_exception.hpp>
 #include <boost/date_time/compiler_config.hpp>
 #include <boost/date_time/string_parse_tree.hpp>
 #include <boost/date_time/date_generators.hpp>
 #include <boost/date_time/format_date_parser.hpp>

 namespace boost { namespace date_time {

   //! Class for date_generator parsing
   /*! The elements of a date_generator "phrase" are parsed from the input stream in a
    *  particular order. All elements are required and the order in which they appear
    *  cannot change, however, the elements themselves can be changed. The default
    *  elements and their order are as follows:
    *
    * - partial_date                     => "dd Month"
    * - nth_day_of_the_week_in_month     => "nth weekday of month"
    * - first_day_of_the_week_in_month   => "first weekday of month"
    * - last_day_of_the_week_in_month    => "last weekday of month"
    * - first_day_of_the_week_after      => "weekday after"
    * - first_day_of_the_week_before     => "weekday before"
    *
    * Weekday and Month names and formats are handled via the date_input_facet.
    *
    */
   template<class date_type, typename charT>
   class date_generator_parser
   {
    public:
     typedef std::basic_string<charT>        string_type;
     typedef std::istreambuf_iterator<charT> stream_itr_type;

     typedef typename date_type::month_type       month_type;
     typedef typename date_type::day_of_week_type day_of_week_type;
     typedef typename date_type::day_type         day_type;

     typedef string_parse_tree<charT>                          parse_tree_type;
     typedef typename parse_tree_type::parse_match_result_type match_results;
     typedef std::vector<std::basic_string<charT> >            collection_type;

     typedef partial_date<date_type>          partial_date_type;
     typedef nth_kday_of_month<date_type>     nth_kday_type;
     typedef first_kday_of_month<date_type>   first_kday_type;
     typedef last_kday_of_month<date_type>    last_kday_type;
     typedef first_kday_after<date_type>      kday_after_type;
     typedef first_kday_before<date_type>     kday_before_type;

     typedef charT char_type;
     static const char_type first_string[6];
     static const char_type second_string[7];
     static const char_type third_string[6];
     static const char_type fourth_string[7];
     static const char_type fifth_string[6];
     static const char_type last_string[5];
     static const char_type before_string[8];
     static const char_type after_string[6];
     static const char_type of_string[3];

     enum phrase_elements {first=0, second, third, fourth, fifth, last,
                           before, after, of, number_of_phrase_elements};

     //! Creates a date_generator_parser with the default set of "element_strings"
     date_generator_parser()
     {
       element_strings(string_type(first_string),
                       string_type(second_string),
                       string_type(third_string),
                       string_type(fourth_string),
                       string_type(fifth_string),
                       string_type(last_string),
                       string_type(before_string),
                       string_type(after_string),
                       string_type(of_string));
     }

     //! Creates a date_generator_parser using a user defined set of element strings
     date_generator_parser(const string_type& first_str,
                           const string_type& second_str,
                           const string_type& third_str,
                           const string_type& fourth_str,
                           const string_type& fifth_str,
                           const string_type& last_str,
                           const string_type& before_str,
                           const string_type& after_str,
                           const string_type& of_str)
     {
       element_strings(first_str, second_str, third_str, fourth_str, fifth_str,
                       last_str, before_str, after_str, of_str);
     }

     //! Replace strings that determine nth week for generator
     void element_strings(const string_type& first_str,
                          const string_type& second_str,
                          const string_type& third_str,
                          const string_type& fourth_str,
                          const string_type& fifth_str,
                          const string_type& last_str,
                          const string_type& before_str,
                          const string_type& after_str,
                          const string_type& of_str)
     {
       collection_type phrases;
       phrases.push_back(first_str);
       phrases.push_back(second_str);
       phrases.push_back(third_str);
       phrases.push_back(fourth_str);
       phrases.push_back(fifth_str);
       phrases.push_back(last_str);
       phrases.push_back(before_str);
       phrases.push_back(after_str);
       phrases.push_back(of_str);
       m_element_strings = parse_tree_type(phrases, this->first); // enum first
     }

     void element_strings(const collection_type& col)
     {
       m_element_strings = parse_tree_type(col, this->first); // enum first
     }

     //! returns partial_date parsed from stream
     template<class facet_type>
     partial_date_type
     get_partial_date_type(stream_itr_type& sitr,
                           stream_itr_type& stream_end,
                           std::ios_base& a_ios,
                           const facet_type& facet) const
     {
       // skip leading whitespace
       while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; }

       day_type d(1);
       month_type m(1);
       facet.get(sitr, stream_end, a_ios, d);
       facet.get(sitr, stream_end, a_ios, m);

       return partial_date_type(d,m);
     }

     //! returns nth_kday_of_week parsed from stream
     template<class facet_type>
     nth_kday_type
     get_nth_kday_type(stream_itr_type& sitr,
                       stream_itr_type& stream_end,
                       std::ios_base& a_ios,
                       const facet_type& facet) const
     {
       // skip leading whitespace
       while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; }

       typename nth_kday_type::week_num wn;
       day_of_week_type wd(0); // no default constructor
       month_type m(1);        // no default constructor

       match_results mr = m_element_strings.match(sitr, stream_end);
       switch(mr.current_match) {
         case first  : { wn = nth_kday_type::first; break; }
         case second : { wn = nth_kday_type::second; break; }
         case third  : { wn = nth_kday_type::third; break; }
         case fourth : { wn = nth_kday_type::fourth; break; }
         case fifth  : { wn = nth_kday_type::fifth; break; }
         default:
         {
           boost::throw_exception(std::ios_base::failure("Parse failed. No match found for '" + mr.cache + "'"));
           BOOST_DATE_TIME_UNREACHABLE_EXPRESSION(wn = nth_kday_type::first);
         }
       }                                         // week num
       facet.get(sitr, stream_end, a_ios, wd);   // day_of_week
       extract_element(sitr, stream_end, of);    // "of" element
       facet.get(sitr, stream_end, a_ios, m);    // month

       return nth_kday_type(wn, wd, m);
     }

     //! returns first_kday_of_week parsed from stream
     template<class facet_type>
     first_kday_type
     get_first_kday_type(stream_itr_type& sitr,
                         stream_itr_type& stream_end,
                         std::ios_base& a_ios,
                         const facet_type& facet) const
     {
       // skip leading whitespace
       while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; }

       day_of_week_type wd(0); // no default constructor
       month_type m(1);        // no default constructor

       extract_element(sitr, stream_end, first); // "first" element
       facet.get(sitr, stream_end, a_ios, wd);   // day_of_week
       extract_element(sitr, stream_end, of);    // "of" element
       facet.get(sitr, stream_end, a_ios, m);    // month


       return first_kday_type(wd, m);
     }

     //! returns last_kday_of_week parsed from stream
     template<class facet_type>
     last_kday_type
     get_last_kday_type(stream_itr_type& sitr,
                        stream_itr_type& stream_end,
                        std::ios_base& a_ios,
                        const facet_type& facet) const
     {
       // skip leading whitespace
       while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; }

       day_of_week_type wd(0); // no default constructor
       month_type m(1);        // no default constructor

       extract_element(sitr, stream_end, last); // "last" element
       facet.get(sitr, stream_end, a_ios, wd);  // day_of_week
       extract_element(sitr, stream_end, of);   // "of" element
       facet.get(sitr, stream_end, a_ios, m);   // month


       return last_kday_type(wd, m);
     }

     //! returns first_kday_of_week parsed from stream
     template<class facet_type>
     kday_before_type
     get_kday_before_type(stream_itr_type& sitr,
                          stream_itr_type& stream_end,
                          std::ios_base& a_ios,
                          const facet_type& facet) const
     {
       // skip leading whitespace
       while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; }

       day_of_week_type wd(0); // no default constructor

       facet.get(sitr, stream_end, a_ios, wd);   // day_of_week
       extract_element(sitr, stream_end, before);// "before" element

       return kday_before_type(wd);
     }

     //! returns first_kday_of_week parsed from stream
     template<class facet_type>
     kday_after_type
     get_kday_after_type(stream_itr_type& sitr,
                         stream_itr_type& stream_end,
                         std::ios_base& a_ios,
                         const facet_type& facet) const
     {
       // skip leading whitespace
       while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; }

       day_of_week_type wd(0); // no default constructor

       facet.get(sitr, stream_end, a_ios, wd);   // day_of_week
       extract_element(sitr, stream_end, after); // "after" element

       return kday_after_type(wd);
     }

    private:
     parse_tree_type m_element_strings;

     //! Extracts phrase element from input. Throws ios_base::failure on error.
     void extract_element(stream_itr_type& sitr,
                          stream_itr_type& stream_end,
                          typename date_generator_parser::phrase_elements ele) const
     {
       // skip leading whitespace
       while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; }
       match_results mr = m_element_strings.match(sitr, stream_end);
       if(mr.current_match != ele) {
         boost::throw_exception(std::ios_base::failure("Parse failed. No match found for '" + mr.cache + "'"));
       }
     }

   };

   template<class date_type, class CharT>
   const typename date_generator_parser<date_type, CharT>::char_type
   date_generator_parser<date_type, CharT>::first_string[6] =
     {'f','i','r','s','t'};
   template<class date_type, class CharT>
   const typename date_generator_parser<date_type, CharT>::char_type
   date_generator_parser<date_type, CharT>::second_string[7] =
     {'s','e','c','o','n','d'};
   template<class date_type, class CharT>
   const typename date_generator_parser<date_type, CharT>::char_type
   date_generator_parser<date_type, CharT>::third_string[6] =
     {'t','h','i','r','d'};
   template<class date_type, class CharT>
   const typename date_generator_parser<date_type, CharT>::char_type
   date_generator_parser<date_type, CharT>::fourth_string[7] =
     {'f','o','u','r','t','h'};
   template<class date_type, class CharT>
   const typename date_generator_parser<date_type, CharT>::char_type
   date_generator_parser<date_type, CharT>::fifth_string[6] =
     {'f','i','f','t','h'};
   template<class date_type, class CharT>
   const typename date_generator_parser<date_type, CharT>::char_type
   date_generator_parser<date_type, CharT>::last_string[5] =
     {'l','a','s','t'};
   template<class date_type, class CharT>
   const typename date_generator_parser<date_type, CharT>::char_type
   date_generator_parser<date_type, CharT>::before_string[8] =
     {'b','e','f','o','r','e'};
   template<class date_type, class CharT>
   const typename date_generator_parser<date_type, CharT>::char_type
   date_generator_parser<date_type, CharT>::after_string[6] =
     {'a','f','t','e','r'};
   template<class date_type, class CharT>
   const typename date_generator_parser<date_type, CharT>::char_type
   date_generator_parser<date_type, CharT>::of_string[3] =
     {'o','f'};

 } } //namespace

 #endif // DATE_TIME_DATE_GENERATOR_PARSER_HPP__

	#ifndef DATE_TIME_DATE_GENERATOR_PARSER_HPP__
	#define DATE_TIME_DATE_GENERATOR_PARSER_HPP__

	/* Copyright (c) 2005 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: 2008-11-12 14:37:53 -0500 (Wed, 12 Nov 2008) $
	*/

	#include <string>
	#include <vector>
	#include <iterator> // istreambuf_iterator
	#include <boost/throw_exception.hpp>
	#include <boost/date_time/compiler_config.hpp>
	#include <boost/date_time/string_parse_tree.hpp>
	#include <boost/date_time/date_generators.hpp>
	#include <boost/date_time/format_date_parser.hpp>

	namespace boost { namespace date_time {

	//! Class for date_generator parsing
	/*! The elements of a date_generator "phrase" are parsed from the input stream in a
	* particular order. All elements are required and the order in which they appear
	* cannot change, however, the elements themselves can be changed. The default
	* elements and their order are as follows:
	*
	* - partial_date => "dd Month"
	* - nth_day_of_the_week_in_month => "nth weekday of month"
	* - first_day_of_the_week_in_month => "first weekday of month"
	* - last_day_of_the_week_in_month => "last weekday of month"
	* - first_day_of_the_week_after => "weekday after"
	* - first_day_of_the_week_before => "weekday before"
	*
	* Weekday and Month names and formats are handled via the date_input_facet.
	*
	*/
	template<class date_type, typename charT>
	class date_generator_parser
	{
	public:
	typedef std::basic_string<charT> string_type;
	typedef std::istreambuf_iterator<charT> stream_itr_type;

	typedef typename date_type::month_type month_type;
	typedef typename date_type::day_of_week_type day_of_week_type;
	typedef typename date_type::day_type day_type;

	typedef string_parse_tree<charT> parse_tree_type;
	typedef typename parse_tree_type::parse_match_result_type match_results;
	typedef std::vector<std::basic_string<charT> > collection_type;

	typedef partial_date<date_type> partial_date_type;
	typedef nth_kday_of_month<date_type> nth_kday_type;
	typedef first_kday_of_month<date_type> first_kday_type;
	typedef last_kday_of_month<date_type> last_kday_type;
	typedef first_kday_after<date_type> kday_after_type;
	typedef first_kday_before<date_type> kday_before_type;

	typedef charT char_type;
	static const char_type first_string[6];
	static const char_type second_string[7];
	static const char_type third_string[6];
	static const char_type fourth_string[7];
	static const char_type fifth_string[6];
	static const char_type last_string[5];
	static const char_type before_string[8];
	static const char_type after_string[6];
	static const char_type of_string[3];

	enum phrase_elements {first=0, second, third, fourth, fifth, last,
	before, after, of, number_of_phrase_elements};

	//! Creates a date_generator_parser with the default set of "element_strings"
	date_generator_parser()
	{
	element_strings(string_type(first_string),
	string_type(second_string),
	string_type(third_string),
	string_type(fourth_string),
	string_type(fifth_string),
	string_type(last_string),
	string_type(before_string),
	string_type(after_string),
	string_type(of_string));
	}

	//! Creates a date_generator_parser using a user defined set of element strings
	date_generator_parser(const string_type& first_str,
	const string_type& second_str,
	const string_type& third_str,
	const string_type& fourth_str,
	const string_type& fifth_str,
	const string_type& last_str,
	const string_type& before_str,
	const string_type& after_str,
	const string_type& of_str)
	{
	element_strings(first_str, second_str, third_str, fourth_str, fifth_str,
	last_str, before_str, after_str, of_str);
	}

	//! Replace strings that determine nth week for generator
	void element_strings(const string_type& first_str,
	const string_type& second_str,
	const string_type& third_str,
	const string_type& fourth_str,
	const string_type& fifth_str,
	const string_type& last_str,
	const string_type& before_str,
	const string_type& after_str,
	const string_type& of_str)
	{
	collection_type phrases;
	phrases.push_back(first_str);
	phrases.push_back(second_str);
	phrases.push_back(third_str);
	phrases.push_back(fourth_str);
	phrases.push_back(fifth_str);
	phrases.push_back(last_str);
	phrases.push_back(before_str);
	phrases.push_back(after_str);
	phrases.push_back(of_str);
	m_element_strings = parse_tree_type(phrases, this->first); // enum first
	}

	void element_strings(const collection_type& col)
	{
	m_element_strings = parse_tree_type(col, this->first); // enum first
	}

	//! returns partial_date parsed from stream
	template<class facet_type>
	partial_date_type
	get_partial_date_type(stream_itr_type& sitr,
	stream_itr_type& stream_end,
	std::ios_base& a_ios,
	const facet_type& facet) const
	{
	// skip leading whitespace
	while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; }

	day_type d(1);
	month_type m(1);
	facet.get(sitr, stream_end, a_ios, d);
	facet.get(sitr, stream_end, a_ios, m);

	return partial_date_type(d,m);
	}

	//! returns nth_kday_of_week parsed from stream
	template<class facet_type>
	nth_kday_type
	get_nth_kday_type(stream_itr_type& sitr,
	stream_itr_type& stream_end,
	std::ios_base& a_ios,
	const facet_type& facet) const
	{
	// skip leading whitespace
	while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; }

	typename nth_kday_type::week_num wn;
	day_of_week_type wd(0); // no default constructor
	month_type m(1); // no default constructor

	match_results mr = m_element_strings.match(sitr, stream_end);
	switch(mr.current_match) {
	case first : { wn = nth_kday_type::first; break; }
	case second : { wn = nth_kday_type::second; break; }
	case third : { wn = nth_kday_type::third; break; }
	case fourth : { wn = nth_kday_type::fourth; break; }
	case fifth : { wn = nth_kday_type::fifth; break; }
	default:
	{
	boost::throw_exception(std::ios_base::failure("Parse failed. No match found for '" + mr.cache + "'"));
	BOOST_DATE_TIME_UNREACHABLE_EXPRESSION(wn = nth_kday_type::first);
	}
	} // week num
	facet.get(sitr, stream_end, a_ios, wd); // day_of_week
	extract_element(sitr, stream_end, of); // "of" element
	facet.get(sitr, stream_end, a_ios, m); // month

	return nth_kday_type(wn, wd, m);
	}

	//! returns first_kday_of_week parsed from stream
	template<class facet_type>
	first_kday_type
	get_first_kday_type(stream_itr_type& sitr,
	stream_itr_type& stream_end,
	std::ios_base& a_ios,
	const facet_type& facet) const
	{
	// skip leading whitespace
	while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; }

	day_of_week_type wd(0); // no default constructor
	month_type m(1); // no default constructor

	extract_element(sitr, stream_end, first); // "first" element
	facet.get(sitr, stream_end, a_ios, wd); // day_of_week
	extract_element(sitr, stream_end, of); // "of" element
	facet.get(sitr, stream_end, a_ios, m); // month


	return first_kday_type(wd, m);
	}

	//! returns last_kday_of_week parsed from stream
	template<class facet_type>
	last_kday_type
	get_last_kday_type(stream_itr_type& sitr,
	stream_itr_type& stream_end,
	std::ios_base& a_ios,
	const facet_type& facet) const
	{
	// skip leading whitespace
	while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; }

	day_of_week_type wd(0); // no default constructor
	month_type m(1); // no default constructor

	extract_element(sitr, stream_end, last); // "last" element
	facet.get(sitr, stream_end, a_ios, wd); // day_of_week
	extract_element(sitr, stream_end, of); // "of" element
	facet.get(sitr, stream_end, a_ios, m); // month


	return last_kday_type(wd, m);
	}

	//! returns first_kday_of_week parsed from stream
	template<class facet_type>
	kday_before_type
	get_kday_before_type(stream_itr_type& sitr,
	stream_itr_type& stream_end,
	std::ios_base& a_ios,
	const facet_type& facet) const
	{
	// skip leading whitespace
	while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; }

	day_of_week_type wd(0); // no default constructor

	facet.get(sitr, stream_end, a_ios, wd); // day_of_week
	extract_element(sitr, stream_end, before);// "before" element

	return kday_before_type(wd);
	}

	//! returns first_kday_of_week parsed from stream
	template<class facet_type>
	kday_after_type
	get_kday_after_type(stream_itr_type& sitr,
	stream_itr_type& stream_end,
	std::ios_base& a_ios,
	const facet_type& facet) const
	{
	// skip leading whitespace
	while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; }

	day_of_week_type wd(0); // no default constructor

	facet.get(sitr, stream_end, a_ios, wd); // day_of_week
	extract_element(sitr, stream_end, after); // "after" element

	return kday_after_type(wd);
	}

	private:
	parse_tree_type m_element_strings;

	//! Extracts phrase element from input. Throws ios_base::failure on error.
	void extract_element(stream_itr_type& sitr,
	stream_itr_type& stream_end,
	typename date_generator_parser::phrase_elements ele) const
	{
	// skip leading whitespace
	while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; }
	match_results mr = m_element_strings.match(sitr, stream_end);
	if(mr.current_match != ele) {
	boost::throw_exception(std::ios_base::failure("Parse failed. No match found for '" + mr.cache + "'"));
	}
	}

	};

	template<class date_type, class CharT>
	const typename date_generator_parser<date_type, CharT>::char_type
	date_generator_parser<date_type, CharT>::first_string[6] =
	{'f','i','r','s','t'};
	template<class date_type, class CharT>
	const typename date_generator_parser<date_type, CharT>::char_type
	date_generator_parser<date_type, CharT>::second_string[7] =
	{'s','e','c','o','n','d'};
	template<class date_type, class CharT>
	const typename date_generator_parser<date_type, CharT>::char_type
	date_generator_parser<date_type, CharT>::third_string[6] =
	{'t','h','i','r','d'};
	template<class date_type, class CharT>
	const typename date_generator_parser<date_type, CharT>::char_type
	date_generator_parser<date_type, CharT>::fourth_string[7] =
	{'f','o','u','r','t','h'};
	template<class date_type, class CharT>
	const typename date_generator_parser<date_type, CharT>::char_type
	date_generator_parser<date_type, CharT>::fifth_string[6] =
	{'f','i','f','t','h'};
	template<class date_type, class CharT>
	const typename date_generator_parser<date_type, CharT>::char_type
	date_generator_parser<date_type, CharT>::last_string[5] =
	{'l','a','s','t'};
	template<class date_type, class CharT>
	const typename date_generator_parser<date_type, CharT>::char_type
	date_generator_parser<date_type, CharT>::before_string[8] =
	{'b','e','f','o','r','e'};
	template<class date_type, class CharT>
	const typename date_generator_parser<date_type, CharT>::char_type
	date_generator_parser<date_type, CharT>::after_string[6] =
	{'a','f','t','e','r'};
	template<class date_type, class CharT>
	const typename date_generator_parser<date_type, CharT>::char_type
	date_generator_parser<date_type, CharT>::of_string[3] =
	{'o','f'};

	} } //namespace

	#endif // DATE_TIME_DATE_GENERATOR_PARSER_HPP__