| #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: 2009-06-04 04:24:49 -0400 (Thu, 04 Jun 2009) $ |
| */ |
| |
| #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; |
| } |
| } //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; |
| } |
| 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 |
| |