cpp_regex_traits.hpp

C++的一个好库。。。现在很流行

         cpp_regex_traits_implementation<charT>::mask_word,
         cpp_regex_traits_implementation<charT>::mask_unicode,
      };
#else
      static const char_class_type masks[14] = 
      {
         ::boost::re_detail::char_class_alnum,
         ::boost::re_detail::char_class_alpha,
         ::boost::re_detail::char_class_cntrl,
         ::boost::re_detail::char_class_digit,
         ::boost::re_detail::char_class_graph,
         ::boost::re_detail::char_class_lower,
         ::boost::re_detail::char_class_print,
         ::boost::re_detail::char_class_punct,
         ::boost::re_detail::char_class_space,
         ::boost::re_detail::char_class_upper,
         ::boost::re_detail::char_class_xdigit,
         ::boost::re_detail::char_class_blank,
         ::boost::re_detail::char_class_word,
         ::boost::re_detail::char_class_unicode,
      };
#endif
      static const string_type null_string;
      for(unsigned int j = 0; j <= 13; ++j)
      {
         string_type s(this->m_pmessages->get(cat, 0, j+300, null_string));
         if(s.size())
            this->m_custom_class_names[s] = masks[j];
      }
   }
#endif
   //
   // get the collation format used by m_pcollate:
   //
   m_collate_type = re_detail::find_sort_syntax(this, &m_collate_delim);
}

template <class charT>
typename cpp_regex_traits_implementation<charT>::char_class_type 
   cpp_regex_traits_implementation<charT>::lookup_classname_imp(const charT* p1, const charT* p2) const
{
#ifndef BOOST_REGEX_BUGGY_CTYPE_FACET
   static const char_class_type masks[20] = 
   {
      0,
      std::ctype<char>::alnum, 
      std::ctype<char>::alpha,
      cpp_regex_traits_implementation<charT>::mask_blank,
      std::ctype<char>::cntrl,
      std::ctype<char>::digit,
      std::ctype<char>::digit,
      std::ctype<char>::graph,
      std::ctype<char>::lower,
      std::ctype<char>::lower,
      std::ctype<char>::print,
      std::ctype<char>::punct,
      std::ctype<char>::space,
      std::ctype<char>::space,
      std::ctype<char>::upper,
      cpp_regex_traits_implementation<charT>::mask_unicode,
      std::ctype<char>::upper,
      std::ctype<char>::alnum | cpp_regex_traits_implementation<charT>::mask_word, 
      std::ctype<char>::alnum | cpp_regex_traits_implementation<charT>::mask_word, 
      std::ctype<char>::xdigit,
   };
#else
   static const char_class_type masks[20] = 
   {
      0,
      ::boost::re_detail::char_class_alnum, 
      ::boost::re_detail::char_class_alpha,
      ::boost::re_detail::char_class_blank,
      ::boost::re_detail::char_class_cntrl,
      ::boost::re_detail::char_class_digit,
      ::boost::re_detail::char_class_digit,
      ::boost::re_detail::char_class_graph,
      ::boost::re_detail::char_class_lower,
      ::boost::re_detail::char_class_lower,
      ::boost::re_detail::char_class_print,
      ::boost::re_detail::char_class_punct,
      ::boost::re_detail::char_class_space,
      ::boost::re_detail::char_class_space,
      ::boost::re_detail::char_class_upper,
      ::boost::re_detail::char_class_unicode,
      ::boost::re_detail::char_class_upper,
      ::boost::re_detail::char_class_alnum | ::boost::re_detail::char_class_word, 
      ::boost::re_detail::char_class_alnum | ::boost::re_detail::char_class_word, 
      ::boost::re_detail::char_class_xdigit,
   };
#endif
   if(m_custom_class_names.size())
   {
      typedef typename std::map<std::basic_string<charT>, char_class_type>::const_iterator map_iter;
      map_iter pos = m_custom_class_names.find(string_type(p1, p2));
      if(pos != m_custom_class_names.end())
         return pos->second;
   }
   std::size_t id = 1 + re_detail::get_default_class_id(p1, p2);
   BOOST_ASSERT(id < sizeof(masks) / sizeof(masks[0]));
   return masks[id];
}

#ifdef BOOST_REGEX_BUGGY_CTYPE_FACET
template <class charT>
bool cpp_regex_traits_implementation<charT>::isctype(const charT c, char_class_type mask) const
{
   return
      ((mask & ::boost::re_detail::char_class_space) && (m_pctype->is(std::ctype<charT>::space, c)))
      || ((mask & ::boost::re_detail::char_class_print) && (m_pctype->is(std::ctype<charT>::print, c)))
      || ((mask & ::boost::re_detail::char_class_cntrl) && (m_pctype->is(std::ctype<charT>::cntrl, c)))
      || ((mask & ::boost::re_detail::char_class_upper) && (m_pctype->is(std::ctype<charT>::upper, c)))
      || ((mask & ::boost::re_detail::char_class_lower) && (m_pctype->is(std::ctype<charT>::lower, c)))
      || ((mask & ::boost::re_detail::char_class_alpha) && (m_pctype->is(std::ctype<charT>::alpha, c)))
      || ((mask & ::boost::re_detail::char_class_digit) && (m_pctype->is(std::ctype<charT>::digit, c)))
      || ((mask & ::boost::re_detail::char_class_punct) && (m_pctype->is(std::ctype<charT>::punct, c)))
      || ((mask & ::boost::re_detail::char_class_xdigit) && (m_pctype->is(std::ctype<charT>::xdigit, c)))
      || ((mask & ::boost::re_detail::char_class_blank) && (m_pctype->is(std::ctype<charT>::space, c)) && !::boost::re_detail::is_separator(c))
      || ((mask & ::boost::re_detail::char_class_word) && (c == '_'))
      || ((mask & ::boost::re_detail::char_class_unicode) && ::boost::re_detail::is_extended(c));
}
#endif


template <class charT>
inline boost::shared_ptr<cpp_regex_traits_implementation<charT> > create_cpp_regex_traits(const std::locale& l BOOST_APPEND_EXPLICIT_TEMPLATE_TYPE(charT))
{
   cpp_regex_traits_base<charT> key(l);
   return ::boost::object_cache<cpp_regex_traits_base<charT>, cpp_regex_traits_implementation<charT> >::get(key, 5);
}

} // re_detail

template <class charT>
class cpp_regex_traits
{
private:
   typedef std::ctype<charT>            ctype_type;
public:
   typedef charT                        char_type;
   typedef std::size_t                  size_type;
   typedef std::basic_string<char_type> string_type;
   typedef std::locale                  locale_type;
   typedef boost::uint_least32_t        char_class_type;

   struct boost_extensions_tag{};

   cpp_regex_traits()
      : m_pimpl(re_detail::create_cpp_regex_traits<charT>(std::locale()))
   { }
   static size_type length(const char_type* p)
   {
      return std::char_traits<charT>::length(p);
   }
   regex_constants::syntax_type syntax_type(charT c)const
   {
      return m_pimpl->syntax_type(c);
   }
   regex_constants::escape_syntax_type escape_syntax_type(charT c) const
   {
      return m_pimpl->escape_syntax_type(c);
   }
   charT translate(charT c) const
   {
      return c;
   }
   charT translate_nocase(charT c) const
   {
      return m_pimpl->m_pctype->tolower(c);
   }
   charT translate(charT c, bool icase) const
   {
      return icase ? m_pimpl->m_pctype->tolower(c) : c;
   }
   charT tolower(charT c) const
   {
      return m_pimpl->m_pctype->tolower(c);
   }
   charT toupper(charT c) const
   {
      return m_pimpl->m_pctype->toupper(c);
   }
   string_type transform(const charT* p1, const charT* p2) const
   {
      return m_pimpl->transform(p1, p2);
   }
   string_type transform_primary(const charT* p1, const charT* p2) const
   {
      return m_pimpl->transform_primary(p1, p2);
   }
   char_class_type lookup_classname(const charT* p1, const charT* p2) const
   {
      return m_pimpl->lookup_classname(p1, p2);
   }
   string_type lookup_collatename(const charT* p1, const charT* p2) const
   {
      return m_pimpl->lookup_collatename(p1, p2);
   }
   bool isctype(charT c, char_class_type f) const
   {
#ifndef BOOST_REGEX_BUGGY_CTYPE_FACET
      typedef typename std::ctype<charT>::mask ctype_mask;

      static const ctype_mask mask_base = 
         static_cast<ctype_mask>(
            std::ctype<charT>::alnum 
            | std::ctype<charT>::alpha
            | std::ctype<charT>::cntrl
            | std::ctype<charT>::digit
            | std::ctype<charT>::graph
            | std::ctype<charT>::lower
            | std::ctype<charT>::print
            | std::ctype<charT>::punct
            | std::ctype<charT>::space
            | std::ctype<charT>::upper
            | std::ctype<charT>::xdigit);

      if((f & mask_base) 
         && (m_pimpl->m_pctype->is(
            static_cast<ctype_mask>(f & mask_base), c)))
         return true;
      else if((f & re_detail::cpp_regex_traits_implementation<charT>::mask_unicode) && re_detail::is_extended(c))
         return true;
      else if((f & re_detail::cpp_regex_traits_implementation<charT>::mask_word) && (c == '_'))
         return true;
      else if((f & re_detail::cpp_regex_traits_implementation<charT>::mask_blank) 
         && m_pimpl->m_pctype->is(std::ctype<charT>::space, c)
         && !re_detail::is_separator(c))
         return true;
      return false;
#else
      return m_pimpl->isctype(c, f);
#endif
   }
   int toi(const charT*& p1, const charT* p2, int radix)const;
   int value(charT c, int radix)const
   {
      const charT* pc = &c;
      return toi(pc, pc + 1, radix);
   }
   locale_type imbue(locale_type l)
   {
      std::locale result(getloc());
      m_pimpl = re_detail::create_cpp_regex_traits<charT>(l);
      return result;
   }
   locale_type getloc()const
   {
      return m_pimpl->m_locale;
   }
   std::string error_string(regex_constants::error_type n) const
   {
      return m_pimpl->error_string(n);
   }

   //
   // extension:
   // set the name of the message catalog in use (defaults to "boost_regex").
   //
   static std::string catalog_name(const std::string& name);
   static std::string get_catalog_name();

private:
   boost::shared_ptr<re_detail::cpp_regex_traits_implementation<charT> > m_pimpl;
   //
   // catalog name handler:
   //
   static std::string& get_catalog_name_inst();

#ifdef BOOST_HAS_THREADS
   static static_mutex& get_mutex_inst();
#endif
};


template <class charT>
int cpp_regex_traits<charT>::toi(const charT*& first, const charT* last, int radix)const
{
   // we do NOT want to parse any thousands separators inside the stream:
   last = std::find(first, last, BOOST_USE_FACET(std::numpunct<charT>, m_pimpl->m_is.getloc()).thousands_sep());
   m_pimpl->m_sbuf.pubsetbuf(const_cast<charT*>(static_cast<const charT*>(first)), static_cast<std::streamsize>(last-first));
   m_pimpl->m_is.clear();
   if(std::abs(radix) == 16) m_pimpl->m_is >> std::hex;
   else if(std::abs(radix) == 8) m_pimpl->m_is >> std::oct;
   else m_pimpl->m_is >> std::dec;
   int val;
   if(m_pimpl->m_is >> val)
   {
      first = first + ((last - first) - m_pimpl->m_sbuf.in_avail());
      return val;
   }
   else
      return -1;
}

template <class charT>
std::string cpp_regex_traits<charT>::catalog_name(const std::string& name)
{
#ifdef BOOST_HAS_THREADS
   static_mutex::scoped_lock lk(get_mutex_inst());
#endif
   std::string result(get_catalog_name_inst());
   get_catalog_name_inst() = name;
   return result;
}

template <class charT>
std::string& cpp_regex_traits<charT>::get_catalog_name_inst()
{
   static std::string s_name;
   return s_name;
}

template <class charT>
std::string cpp_regex_traits<charT>::get_catalog_name()
{
#ifdef BOOST_HAS_THREADS
   static_mutex::scoped_lock lk(get_mutex_inst());
#endif
   std::string result(get_catalog_name_inst());
   return result;
}

#ifdef BOOST_HAS_THREADS
template <class charT>
static_mutex& cpp_regex_traits<charT>::get_mutex_inst()
{
   static static_mutex s_mutex = BOOST_STATIC_MUTEX_INIT;
   return s_mutex;
}
#endif


} // boost

#ifdef BOOST_MSVC
#pragma warning(pop)
#endif

#ifdef BOOST_HAS_ABI_HEADERS
#  include BOOST_ABI_SUFFIX
#endif

#endif

#endif