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authorRemko Tronçon <git@el-tramo.be>2009-06-01 08:48:42 (GMT)
committerRemko Tronçon <git@el-tramo.be>2009-06-01 09:24:28 (GMT)
commit2812bddd81f8a1b804c7460f4e14cd0aa393d129 (patch)
treed46294f35150c4f0f43deaf2d31fceaf945ae715 /3rdParty/Boost/boost/date_time/special_values_parser.hpp
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+
+#ifndef DATE_TIME_SPECIAL_VALUES_PARSER_HPP__
+#define DATE_TIME_SPECIAL_VALUES_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:
+ */
+
+
+#include "boost/date_time/string_parse_tree.hpp"
+#include "boost/date_time/special_defs.hpp"
+#include <string>
+#include <vector>
+
+namespace boost { namespace date_time {
+
+ //! Class for special_value parsing
+ /*!
+ * TODO: add doc-comments for which elements can be changed
+ * Parses input stream for strings representing special_values.
+ * Special values parsed are:
+ * - not_a_date_time
+ * - neg_infin
+ * - pod_infin
+ * - min_date_time
+ * - max_date_time
+ */
+ template<class date_type, typename charT>
+ class special_values_parser
+ {
+ public:
+ typedef std::basic_string<charT> string_type;
+ //typedef std::basic_stringstream<charT> stringstream_type;
+ typedef std::istreambuf_iterator<charT> stream_itr_type;
+ //typedef typename string_type::const_iterator const_itr;
+ //typedef typename date_type::year_type year_type;
+ //typedef typename date_type::month_type month_type;
+ typedef typename date_type::duration_type duration_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 charT char_type;
+ static const char_type nadt_string[16];
+ static const char_type neg_inf_string[10];
+ static const char_type pos_inf_string[10];
+ static const char_type min_date_time_string[18];
+ static const char_type max_date_time_string[18];
+
+ //! Creates a special_values_parser with the default set of "sv_strings"
+ special_values_parser()
+ {
+ sv_strings(string_type(nadt_string),
+ string_type(neg_inf_string),
+ string_type(pos_inf_string),
+ string_type(min_date_time_string),
+ string_type(max_date_time_string));
+ }
+
+ //! Creates a special_values_parser using a user defined set of element strings
+ special_values_parser(const string_type& nadt_str,
+ const string_type& neg_inf_str,
+ const string_type& pos_inf_str,
+ const string_type& min_dt_str,
+ const string_type& max_dt_str)
+ {
+ sv_strings(nadt_str, neg_inf_str, pos_inf_str, min_dt_str, max_dt_str);
+ }
+
+ special_values_parser(typename collection_type::iterator beg, typename collection_type::iterator end)
+ {
+ collection_type phrases;
+ std::copy(beg, end, std::back_inserter(phrases));
+ m_sv_strings = parse_tree_type(phrases, static_cast<int>(not_a_date_time));
+ }
+
+ special_values_parser(const special_values_parser<date_type,charT>& svp)
+ {
+ this->m_sv_strings = svp.m_sv_strings;
+ }
+
+ //! Replace special value strings
+ void sv_strings(const string_type& nadt_str,
+ const string_type& neg_inf_str,
+ const string_type& pos_inf_str,
+ const string_type& min_dt_str,
+ const string_type& max_dt_str)
+ {
+ collection_type phrases;
+ phrases.push_back(nadt_str);
+ phrases.push_back(neg_inf_str);
+ phrases.push_back(pos_inf_str);
+ phrases.push_back(min_dt_str);
+ phrases.push_back(max_dt_str);
+ m_sv_strings = parse_tree_type(phrases, static_cast<int>(not_a_date_time));
+ }
+
+ /* Does not return a special_value because if the parsing fails,
+ * the return value will always be not_a_date_time
+ * (mr.current_match retains its default value of -1 on a failed
+ * parse and that casts to not_a_date_time). */
+ //! Sets match_results.current_match to the corresponding special_value or -1
+ bool match(stream_itr_type& sitr,
+ stream_itr_type& str_end,
+ match_results& mr) const
+ {
+ unsigned int level = 0;
+ m_sv_strings.match(sitr, str_end, mr, level);
+ return (mr.current_match != match_results::PARSE_ERROR);
+ }
+ /*special_values match(stream_itr_type& sitr,
+ stream_itr_type& str_end,
+ match_results& mr) const
+ {
+ unsigned int level = 0;
+ m_sv_strings.match(sitr, str_end, mr, level);
+ if(mr.current_match == match_results::PARSE_ERROR) {
+ throw std::ios_base::failure("Parse failed. No match found for '" + mr.cache + "'");
+ }
+ return static_cast<special_values>(mr.current_match);
+ }*/
+
+
+ private:
+ parse_tree_type m_sv_strings;
+
+ };
+
+ template<class date_type, class CharT>
+ const typename special_values_parser<date_type, CharT>::char_type
+ special_values_parser<date_type, CharT>::nadt_string[16] =
+ {'n','o','t','-','a','-','d','a','t','e','-','t','i','m','e'};
+ template<class date_type, class CharT>
+ const typename special_values_parser<date_type, CharT>::char_type
+ special_values_parser<date_type, CharT>::neg_inf_string[10] =
+ {'-','i','n','f','i','n','i','t','y'};
+ template<class date_type, class CharT>
+ const typename special_values_parser<date_type, CharT>::char_type
+ special_values_parser<date_type, CharT>::pos_inf_string[10] =
+ {'+','i','n','f','i','n','i','t','y'};
+ template<class date_type, class CharT>
+ const typename special_values_parser<date_type, CharT>::char_type
+ special_values_parser<date_type, CharT>::min_date_time_string[18] =
+ {'m','i','n','i','m','u','m','-','d','a','t','e','-','t','i','m','e'};
+ template<class date_type, class CharT>
+ const typename special_values_parser<date_type, CharT>::char_type
+ special_values_parser<date_type, CharT>::max_date_time_string[18] =
+ {'m','a','x','i','m','u','m','-','d','a','t','e','-','t','i','m','e'};
+
+} } //namespace
+
+#endif // DATE_TIME_SPECIAL_VALUES_PARSER_HPP__
+