comparison DEPENDENCIES/generic/include/boost/date_time/date_parsing.hpp @ 16:2665513ce2d3

Add boost headers

+#ifndef _DATE_TIME_DATE_PARSING_HPP___
+#define _DATE_TIME_DATE_PARSING_HPP___
+
+/* Copyright (c) 2002,2003,2005 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: 2012-09-30 16:25:22 -0700 (Sun, 30 Sep 2012) $
+ */
+
+#include <string>
+#include <iterator>
+#include <algorithm>
+#include <boost/tokenizer.hpp>
+#include <boost/lexical_cast.hpp>
+#include <boost/date_time/compiler_config.hpp>
+#include <boost/date_time/parse_format_base.hpp>
+
+#if defined(BOOST_DATE_TIME_NO_LOCALE)
+#include <cctype> // ::tolower(int)
+#else
+#include <locale> // std::tolower(char, locale)
+#endif
+
+namespace boost {
+namespace date_time {
+
+  //! A function to replace the std::transform( , , ,tolower) construct
+  /*! This function simply takes a string, and changes all the characters
+   * in that string to lowercase (according to the default system locale).
+   * In the event that a compiler does not support locales, the old
+   * C style tolower() is used.
+   */
+  inline
+  std::string
+  convert_to_lower(std::string inp)
+  {
+#if !defined(BOOST_DATE_TIME_NO_LOCALE)
+    const std::locale loc(std::locale::classic());
+#endif
+    std::string::size_type i = 0, n = inp.length();
+    for (; i < n; ++i) {
+      inp[i] =
+#if defined(BOOST_DATE_TIME_NO_LOCALE)
+        static_cast<char>(std::tolower(inp[i]));
+#else
+        // tolower and others were brought in to std for borland >= v564
+        // in compiler_config.hpp
+        std::tolower(inp[i], loc);
+#endif
+    }
+    return inp;
+  }
+
+    //! Helper function for parse_date.
+    /* Used by-value parameter because we change the string and may
+     * want to preserve the original argument */
+    template<class month_type>
+    inline unsigned short
+    month_str_to_ushort(std::string const& s) {
+      if((s.at(0) >= '0') && (s.at(0) <= '9')) {
+        return boost::lexical_cast<unsigned short>(s);
+      }
+      else {
+        std::string str = convert_to_lower(s);
+        typename month_type::month_map_ptr_type ptr = month_type::get_month_map_ptr();
+        typename month_type::month_map_type::iterator iter = ptr->find(str);
+        if(iter != ptr->end()) { // required for STLport
+          return iter->second;
+        }
+      }
+      return 13; // intentionally out of range - name not found
+    }
+ 
+    //! Find index of a string in either of 2 arrays
+    /*! find_match searches both arrays for a match to 's'. Both arrays
+     * must contain 'size' elements. The index of the match is returned.
+     * If no match is found, 'size' is returned.
+     * Ex. "Jan" returns 0, "Dec" returns 11, "Tue" returns 2.
+     * 'size' can be sent in with: (greg_month::max)() (which 12),
+     * (greg_weekday::max)() + 1 (which is 7) or date_time::NumSpecialValues */
+    template<class charT>
+    short find_match(const charT* const* short_names,
+                     const charT* const* long_names,
+                     short size,
+                     const std::basic_string<charT>& s) {
+      for(short i = 0; i < size; ++i){
+        if(short_names[i] == s || long_names[i] == s){
+          return i;
+        }
+      }
+      return size; // not-found, return a value out of range
+    }
+
+    //! Generic function to parse a delimited date (eg: 2002-02-10)
+    /*! Accepted formats are: "2003-02-10" or " 2003-Feb-10" or
+     * "2003-Feburary-10"
+     * The order in which the Month, Day, & Year appear in the argument
+     * string can be accomodated by passing in the appropriate ymd_order_spec
+     */
+    template<class date_type>
+    date_type
+    parse_date(const std::string& s, int order_spec = ymd_order_iso) {
+      std::string spec_str;
+      if(order_spec == ymd_order_iso) {
+        spec_str = "ymd";
+      }
+      else if(order_spec == ymd_order_dmy) {
+        spec_str = "dmy";
+      }
+      else { // (order_spec == ymd_order_us)
+        spec_str = "mdy";
+      }
+
+      typedef typename date_type::year_type year_type;
+      typedef typename date_type::month_type month_type;
+      unsigned pos = 0;
+      unsigned short year(0), month(0), day(0);
+      typedef typename std::basic_string<char>::traits_type traits_type;
+      typedef boost::char_separator<char, traits_type> char_separator_type;
+      typedef boost::tokenizer<char_separator_type,
+                               std::basic_string<char>::const_iterator,
+                               std::basic_string<char> > tokenizer;
+      typedef boost::tokenizer<char_separator_type,
+                               std::basic_string<char>::const_iterator,
+                               std::basic_string<char> >::iterator tokenizer_iterator;
+      // may need more delimiters, these work for the regression tests
+      const char sep_char[] = {',','-','.',' ','/','\0'};
+      char_separator_type sep(sep_char);
+      tokenizer tok(s,sep);
+      for(tokenizer_iterator beg=tok.begin();
+          beg!=tok.end() && pos < spec_str.size();
+          ++beg, ++pos) {
+        switch(spec_str.at(pos)) {
+          case 'y':
+          {
+            year = boost::lexical_cast<unsigned short>(*beg);
+            break;
+          }
+          case 'm':
+          {
+            month = month_str_to_ushort<month_type>(*beg);
+            break;
+          }
+          case 'd':
+          {
+            day = boost::lexical_cast<unsigned short>(*beg);
+            break;
+          }
+          default: break;
+        } //switch
+      }
+      return date_type(year, month, day);
+    }
+
+    //! Generic function to parse undelimited date (eg: 20020201)
+    template<class date_type>
+    date_type
+    parse_undelimited_date(const std::string& s) {
+      int offsets[] = {4,2,2};
+      int pos = 0;
+      typedef typename date_type::year_type year_type;
+      //typename date_type::ymd_type ymd((year_type::min)(),1,1);
+      unsigned short y = 0, m = 0, d = 0;
+
+      /* The two bool arguments state that parsing will not wrap
+       * (only the first 8 characters will be parsed) and partial
+       * strings will not be parsed.
+       * Ex:
+       * "2005121" will parse 2005 & 12, but not the "1" */
+      boost::offset_separator osf(offsets, offsets+3, false, false);
+
+      typedef typename boost::tokenizer<boost::offset_separator,
+                                        std::basic_string<char>::const_iterator,
+                                        std::basic_string<char> > tokenizer_type;
+      tokenizer_type tok(s, osf);
+      for(typename tokenizer_type::iterator ti=tok.begin(); ti!=tok.end();++ti) {
+        unsigned short i = boost::lexical_cast<unsigned short>(*ti);
+        switch(pos) {
+        case 0: y = i; break;
+        case 1: m = i; break;
+        case 2: d = i; break;
+        default:       break;
+        }
+        pos++;
+      }
+      return date_type(y,m,d);
+    }
+
+    //! Helper function for 'date gregorian::from_stream()'
+    /*! Creates a string from the iterators that reference the
+     * begining & end of a char[] or string. All elements are
+     * used in output string */
+    template<class date_type, class iterator_type>
+    inline
+    date_type
+    from_stream_type(iterator_type& beg,
+                     iterator_type const& end,
+                     char)
+    {
+      std::ostringstream ss;
+      while(beg != end) {
+        ss << *beg++;
+      }
+      return parse_date<date_type>(ss.str());
+    }
+
+    //! Helper function for 'date gregorian::from_stream()'
+    /*! Returns the first string found in the stream referenced by the
+     * begining & end iterators */
+    template<class date_type, class iterator_type>
+    inline
+    date_type
+    from_stream_type(iterator_type& beg,
+                     iterator_type const& /* end */,
+                     std::string const&)
+    {
+      return parse_date<date_type>(*beg);
+    }
+
+    /* I believe the wchar stuff would be best elsewhere, perhaps in
+     * parse_date<>()? In the mean time this gets us started... */
+    //! Helper function for 'date gregorian::from_stream()'
+    /*! Creates a string from the iterators that reference the
+     * begining & end of a wstring. All elements are
+     * used in output string */
+    template<class date_type, class iterator_type>
+    inline
+    date_type from_stream_type(iterator_type& beg,
+                               iterator_type const& end,
+                               wchar_t)
+    {
+      std::ostringstream ss;
+#if !defined(BOOST_DATE_TIME_NO_LOCALE)
+      std::locale loc;
+      std::ctype<wchar_t> const& fac = std::use_facet<std::ctype<wchar_t> >(loc);
+      while(beg != end) {
+        ss << fac.narrow(*beg++, 'X'); // 'X' will cause exception to be thrown
+      }
+#else
+      while(beg != end) {
+        char c = 'X'; // 'X' will cause exception to be thrown
+        const wchar_t wc = *beg++;
+        if (wc >= 0 && wc <= 127)
+          c = static_cast< char >(wc);
+        ss << c;
+      }
+#endif
+      return parse_date<date_type>(ss.str());
+    }
+#ifndef BOOST_NO_STD_WSTRING
+    //! Helper function for 'date gregorian::from_stream()'
+    /*! Creates a string from the first wstring found in the stream
+     * referenced by the begining & end iterators */
+    template<class date_type, class iterator_type>
+    inline
+    date_type
+    from_stream_type(iterator_type& beg,
+                     iterator_type const& /* end */,
+                     std::wstring const&) {
+      std::wstring ws = *beg;
+      std::ostringstream ss;
+      std::wstring::iterator wsb = ws.begin(), wse = ws.end();
+#if !defined(BOOST_DATE_TIME_NO_LOCALE)
+      std::locale loc;
+      std::ctype<wchar_t> const& fac = std::use_facet<std::ctype<wchar_t> >(loc);
+      while(wsb != wse) {
+        ss << fac.narrow(*wsb++, 'X'); // 'X' will cause exception to be thrown
+      }
+#else
+      while(wsb != wse) {
+        char c = 'X'; // 'X' will cause exception to be thrown
+        const wchar_t wc = *wsb++;
+        if (wc >= 0 && wc <= 127)
+          c = static_cast< char >(wc);
+        ss << c;
+      }
+#endif
+      return parse_date<date_type>(ss.str());
+    }
+#endif // BOOST_NO_STD_WSTRING
+#if (defined(BOOST_MSVC) && (_MSC_VER < 1300))
+    // This function cannot be compiled with MSVC 6.0 due to internal compiler shorcomings
+#else
+    //! function called by wrapper functions: date_period_from_(w)string()
+    template<class date_type, class charT>
+    period<date_type, typename date_type::duration_type>
+    from_simple_string_type(const std::basic_string<charT>& s){
+      typedef typename std::basic_string<charT>::traits_type traits_type;
+      typedef typename boost::char_separator<charT, traits_type> char_separator;
+      typedef typename boost::tokenizer<char_separator,
+                                        typename std::basic_string<charT>::const_iterator,
+                                        std::basic_string<charT> > tokenizer;
+      const charT sep_list[4] = {'[','/',']','\0'};
+      char_separator sep(sep_list);
+      tokenizer tokens(s, sep);
+      typename tokenizer::iterator tok_it = tokens.begin();
+      std::basic_string<charT> date_string = *tok_it;
+      // get 2 string iterators and generate a date from them
+      typename std::basic_string<charT>::iterator date_string_start = date_string.begin(),
+                                                  date_string_end = date_string.end();
+      typedef typename std::iterator_traits<typename std::basic_string<charT>::iterator>::value_type value_type;
+      date_type d1 = from_stream_type<date_type>(date_string_start, date_string_end, value_type());
+      date_string = *(++tok_it); // next token
+      date_string_start = date_string.begin(), date_string_end = date_string.end();
+      date_type d2 = from_stream_type<date_type>(date_string_start, date_string_end, value_type());
+      return period<date_type, typename date_type::duration_type>(d1, d2);
+    }
+#endif
+
+} } //namespace date_time
+
+
+
+
+#endif
+