Added boost header

test/external/boost/date_time/special_values_parser.hpp

@@ -0,0 +1,159 @@
+
+#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__
+