diff options
Diffstat (limited to 'ext/boost/date_time/date_generator_parser.hpp')
| -rw-r--r-- | ext/boost/date_time/date_generator_parser.hpp | 330 |
1 files changed, 330 insertions, 0 deletions
diff --git a/ext/boost/date_time/date_generator_parser.hpp b/ext/boost/date_time/date_generator_parser.hpp new file mode 100644 index 0000000000..f11eb42d52 --- /dev/null +++ b/ext/boost/date_time/date_generator_parser.hpp @@ -0,0 +1,330 @@ + +#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__ + |