--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ossrv_pub/boost_apis/boost/date_time/date_generator_parser.hpp Tue Feb 02 02:01:42 2010 +0200
@@ -0,0 +1,329 @@
+
+#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 or http://www.boost.org/LICENSE-1.0)
+ * Author: Jeff Garland, Bart Garst
+ * $Date: 2005/08/20 18:22:06 $
+ */
+
+
+#include "boost/date_time/string_parse_tree.hpp"
+#include "boost/date_time/date_generators.hpp"
+#include "boost/date_time/format_date_parser.hpp"
+#include <string>
+#include <vector>
+
+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:
+ {
+ throw std::ios_base::failure("Parse failed. No match found for '" + mr.cache + "'");
+ break;
+ }
+ } // 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) {
+ throw 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__
+