third_party/boost/include/boost/date_time/date_parsing.hpp - webm/webmlive - Git at Google

 #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
	#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