FCL/sf/os/ossrv: comparison ossrv_pub/boost_apis/boost/date_time/date_generator

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+:e4d67989cc36
+#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__