regex_traits.hpp

boost库提供标准的C++ API 配合dev c++使用,功能更加强大

#if !defined(BOOST_NO_STD_LOCALE)

namespace re_detail
{

template <class charT>
struct message_data;

template <>
struct message_data<char>;

template <>
struct message_data<regex_wchar_type>;

struct BOOST_REGEX_DECL cpp_regex_traits_base : public regex_traits_base
{
   enum char_class_type
   {
      char_class_none = 0,
      char_class_alnum = std::ctype_base::alnum,
      char_class_alpha = std::ctype_base::alpha,
      char_class_cntrl = std::ctype_base::cntrl,
      char_class_digit = std::ctype_base::digit,
      char_class_graph = std::ctype_base::graph,
      char_class_lower = std::ctype_base::lower,
      char_class_print = std::ctype_base::print,
      char_class_punct = std::ctype_base::punct,
      char_class_space = std::ctype_base::space,
      char_class_upper = std::ctype_base::upper,
      char_class_xdigit = std::ctype_base::xdigit,
      char_class_blank = 1<<12,
      char_class_underscore = 1<<13,
      char_class_word = std::ctype_base::alnum | char_class_underscore,
      char_class_unicode = 1<<14,
      char_class_all_base = char_class_alnum | char_class_alpha | char_class_cntrl
                         | char_class_digit | char_class_graph | char_class_lower
                         | char_class_print | char_class_punct | char_class_space
                         | char_class_upper | char_class_xdigit
   };

   static std::string BOOST_REGEX_CALL set_message_catalogue(const std::string& s);
protected:
   static char regex_message_cat[BOOST_REGEX_MAX_PATH];
};

} // namespace re_detail

template <class charT>
class cpp_regex_traits;

template<>
class BOOST_REGEX_DECL cpp_regex_traits<char> : public re_detail::cpp_regex_traits_base
{
   typedef re_detail::cpp_regex_traits_base base_type;
private:
   re_detail::message_data<char>* pmd;
   const unsigned char* psyntax;
   char* lower_map;
   const std::ctype<char>* pctype;
   const std::collate<char>* pcollate;
   std::locale locale_inst;
   unsigned sort_type;
   char sort_delim;

   cpp_regex_traits(const cpp_regex_traits&);
   cpp_regex_traits& operator=(const cpp_regex_traits&);

public:
   typedef char char_type;
   typedef unsigned char uchar_type;
   typedef unsigned int size_type;
   typedef std::string string_type;
   typedef std::locale locale_type;

   cpp_regex_traits();
   ~cpp_regex_traits();

   static std::size_t BOOST_REGEX_CALL length(const char_type* p)
   {
      return std::strlen(p);
   }
   unsigned int BOOST_REGEX_CALL syntax_type(size_type c)const
   {
      return psyntax[c];
   }
   char BOOST_REGEX_CALL translate(char c, bool icase)const
   {
      return icase ? lower_map[(size_type)(uchar_type)c] : c;
   }
   void BOOST_REGEX_CALL transform(std::string& out, const std::string& in)const
   {
      out = pcollate->transform(in.c_str(), in.c_str() + in.size()).c_str();
   }

   void BOOST_REGEX_CALL transform_primary(std::string& out, const std::string& in)const;

   static bool BOOST_REGEX_CALL is_separator(char c)
   {
      return BOOST_REGEX_MAKE_BOOL((c == '\n') || (c == '\r'));
   }

   static bool BOOST_REGEX_CALL is_combining(char)
   {
      return false;
   }
   
   bool BOOST_REGEX_CALL is_class(char c, boost::uint_fast32_t f)const
   {
      if(pctype->is((std::ctype<char>::mask)(f & char_class_all_base), c))
         return true;
      if((f & char_class_underscore) && (c == '_'))
         return true;
      if((f & char_class_blank) && ((c == ' ') || (c == '\t')))
         return true;
      return false;
   }

   int BOOST_REGEX_CALL toi(char c)const;
   int BOOST_REGEX_CALL toi(const char*& first, const char* last, int radix)const;

   boost::uint_fast32_t BOOST_REGEX_CALL lookup_classname(const char* first, const char* last)const;
   bool BOOST_REGEX_CALL lookup_collatename(std::string& s, const char* first, const char* last)const;

   std::string BOOST_REGEX_CALL error_string(unsigned id)const;
   locale_type BOOST_REGEX_CALL imbue(locale_type l);
   locale_type BOOST_REGEX_CALL getloc()const{ return locale_inst; }
   void swap(cpp_regex_traits&);

   struct sentry
   {
      sentry(const cpp_regex_traits<char>&){}
      operator void*() { return this; }
   };
};

#if !defined(BOOST_NO_WREGEX) && !defined(BOOST_NO_STD_WSTREAMBUF)
template<>
class BOOST_REGEX_DECL cpp_regex_traits<regex_wchar_type> : public re_detail::cpp_regex_traits_base
{
   typedef re_detail::cpp_regex_traits_base base_type;
public:
   typedef regex_wchar_type char_type;
   typedef unsigned short uchar_type;
   typedef unsigned int size_type;
   typedef std::basic_string<regex_wchar_type> string_type;
   typedef std::locale locale_type;

private:
   re_detail::message_data<regex_wchar_type>* pmd;
   const unsigned char* psyntax;
   regex_wchar_type* lower_map;
   const std::ctype<regex_wchar_type>* pctype;
   const std::collate<regex_wchar_type>* pcollate;
   const std::codecvt<regex_wchar_type, char, std::mbstate_t>* pcdv;
   std::locale locale_inst;
   unsigned int BOOST_REGEX_CALL do_syntax_type(size_type c)const;
   unsigned sort_type;
   regex_wchar_type sort_delim;

   cpp_regex_traits(const cpp_regex_traits&);
   cpp_regex_traits& operator=(const cpp_regex_traits&);

public:
#ifndef BOOST_REGEX_HAS_SHORT_WCHAR_T
   static std::size_t BOOST_REGEX_CALL length(const char_type* p)
   {
      return std::wcslen(p);
   }
#else
   static std::size_t BOOST_REGEX_CALL length(const char_type* p)
   {
      return std::wcslen(reinterpret_cast<const wchar_t*>(p));
   }
#endif
   unsigned int BOOST_REGEX_CALL syntax_type(size_type c)const
   {
      return (c < UCHAR_MAX) ? psyntax[c] : do_syntax_type(c);
   }
   regex_wchar_type BOOST_REGEX_CALL translate(regex_wchar_type c, bool icase)const
   {
      return icase ? (((uchar_type)c) <= UCHAR_MAX) ? lower_map[c] : pctype->tolower(c) : c;
   }
   void BOOST_REGEX_CALL transform(std::basic_string<regex_wchar_type>& out, const std::basic_string<regex_wchar_type>& in)const
   {
      out = pcollate->transform(in.c_str(), in.c_str() + in.size());
   }

   void BOOST_REGEX_CALL transform_primary(std::basic_string<regex_wchar_type>& out, const std::basic_string<regex_wchar_type>& in)const;

   static bool BOOST_REGEX_CALL is_separator(regex_wchar_type c)
   {
      return BOOST_REGEX_MAKE_BOOL((c == L'\n') || (c == L'\r') || (c == (regex_wchar_type)0x2028) || (c == (regex_wchar_type)0x2029));
   }

   static bool BOOST_REGEX_CALL is_combining(regex_wchar_type c)
   { return re_detail::is_combining(c); }
   
   bool BOOST_REGEX_CALL is_class(regex_wchar_type c, boost::uint_fast32_t f)const
   {
      if(pctype->is((std::ctype<regex_wchar_type>::mask)(f & char_class_all_base), c))
         return true;
      if((f & char_class_underscore) && (c == '_'))
         return true;
      if((f & char_class_blank) && ((c == ' ') || (c == '\t')))
         return true;
      if((f & char_class_unicode) && ((uchar_type)c > (uchar_type)255))
         return true;
      return false;
   }

   int BOOST_REGEX_CALL toi(regex_wchar_type c)const;
   int BOOST_REGEX_CALL toi(const regex_wchar_type*& first, const regex_wchar_type* last, int radix)const;

   boost::uint_fast32_t BOOST_REGEX_CALL lookup_classname(const regex_wchar_type* first, const regex_wchar_type* last)const;
   bool BOOST_REGEX_CALL lookup_collatename(std::basic_string<regex_wchar_type>& s, const regex_wchar_type* first, const regex_wchar_type* last)const;

   std::string BOOST_REGEX_CALL error_string(unsigned id)const;
   void swap(cpp_regex_traits&);
   cpp_regex_traits();
   ~cpp_regex_traits();
   locale_type BOOST_REGEX_CALL imbue(locale_type l);
   locale_type BOOST_REGEX_CALL getloc()const{ return locale_inst; }
   std::size_t BOOST_REGEX_CALL strwiden(regex_wchar_type *s1, std::size_t len, const char *s2)const;

   struct sentry
   {
      sentry(const cpp_regex_traits<regex_wchar_type>&){}
      operator void*() { return this; }
   };
};

#ifdef BOOST_REGEX_HAS_SHORT_WCHAR_T
//
// What follows here is Visual Studio specific - it is a thin wrapper
// that redirects calls to cpp_regex_traits<unsigned short> to
// cpp_regex_traits<__wchar_t>.  This allows the library to be built
// so that it supports programs built both with and without /Zc:wchar_t.
//
template<>
class cpp_regex_traits<unsigned short> : public re_detail::cpp_regex_traits_base
{
   typedef re_detail::cpp_regex_traits_base base_type;
public:
   typedef unsigned short char_type;
   typedef unsigned short uchar_type;
   typedef unsigned int size_type;
   typedef std::basic_string<unsigned short> string_type;
   typedef std::locale locale_type; 
   static std::size_t BOOST_REGEX_CALL length(const char_type* p)
   {
      return cpp_regex_traits<regex_wchar_type>::length(
         reinterpret_cast<const regex_wchar_type*>(p));
   }
   unsigned int BOOST_REGEX_CALL syntax_type(size_type c)const
   { 
      return m_imp.syntax_type(c); 
   }
   unsigned short BOOST_REGEX_CALL translate(unsigned short c, bool icase)const
   {
      return m_imp.translate(c, icase);
   }

   void BOOST_REGEX_CALL transform(std::basic_string<unsigned short>& out, const std::basic_string<unsigned short>& in)const
   { 
      m_imp.transform(
         reinterpret_cast<std::basic_string<regex_wchar_type>&>(out), 
         reinterpret_cast<const std::basic_string<regex_wchar_type>&>(in)); 
   }

   void BOOST_REGEX_CALL transform_primary(std::basic_string<unsigned short>& out, const std::basic_string<unsigned short>& in)const
   { 
      m_imp.transform_primary(
         reinterpret_cast<std::basic_string<regex_wchar_type>&>(out), 
         reinterpret_cast<const std::basic_string<regex_wchar_type>&>(in)); }

   static bool BOOST_REGEX_CALL is_separator(unsigned short c)
   {
      return cpp_regex_traits<regex_wchar_type>::is_separator(c);
   }

   static bool BOOST_REGEX_CALL is_combining(unsigned short c)
   { 
      return cpp_regex_traits<regex_wchar_type>::is_combining(c); 
   }
   
   bool BOOST_REGEX_CALL is_class(unsigned short c, boost::uint_fast32_t f)const
   {
      return m_imp.is_class(c, f);
   }

   int BOOST_REGEX_CALL toi(unsigned short c)const
   { 
      return m_imp.toi(c); 
   }
   int BOOST_REGEX_CALL toi(const unsigned short*& first, const unsigned short* last, int radix)const
   { 
      return m_imp.toi(
         reinterpret_cast<const regex_wchar_type*&>(first), 
         reinterpret_cast<const regex_wchar_type*>(last), 
         radix); 
   }

   boost::uint_fast32_t BOOST_REGEX_CALL lookup_classname(const unsigned short* first, const unsigned short* last)const
   {
      return m_imp.lookup_classname(
         reinterpret_cast<const regex_wchar_type*>(first), 
         reinterpret_cast<const regex_wchar_type*>(last));
   }

   bool BOOST_REGEX_CALL lookup_collatename(std::basic_string<unsigned short>& s, const unsigned short* first, const unsigned short* last)const
   {
      return m_imp.lookup_collatename(
         reinterpret_cast<std::basic_string<regex_wchar_type>&>(s), 
         reinterpret_cast<const regex_wchar_type*>(first), 
         reinterpret_cast<const regex_wchar_type*>(last));
   }

   locale_type BOOST_REGEX_CALL imbue(locale_type l)
   { 
      return m_imp.imbue(l); 
   }
   locale_type BOOST_REGEX_CALL getloc()const
   { 
      return m_imp.getloc(); 
   }

   struct sentry
   {
      sentry(const cpp_regex_traits<unsigned short>&){}
      operator void*() { return this; }
   };
   void swap(cpp_regex_traits& that)
   {
      m_imp.swap(that.m_imp);
   }
   cpp_regex_traits(){};
   ~cpp_regex_traits(){};
   std::size_t BOOST_REGEX_CALL strwiden(unsigned short *s1, std::size_t len, const char *s2)const
   { 
      return m_imp.strwiden(
         reinterpret_cast<regex_wchar_type *>(s1), len, s2); 
   }
   std::string BOOST_REGEX_CALL error_string(unsigned id)const
   {
      return m_imp.error_string(id);
   }

private:
   cpp_regex_traits<regex_wchar_type> m_imp;

};

#endif // BOOST_REGEX_HAS_SHORT_WCHAR_T
#endif // BOOST_NO_WREGEX

#endif // BOOST_NO_STD_LOCALE

#ifdef BOOST_REGEX_USE_WIN32_LOCALE

template <class charT>
class regex_traits : public w32_regex_traits<charT>
{
};

#elif defined(BOOST_REGEX_USE_C_LOCALE)

template <class charT>
class regex_traits : public c_regex_traits<charT>
{
};

#elif defined(BOOST_REGEX_USE_CPP_LOCALE)

template <class charT>
class regex_traits : public cpp_regex_traits<charT>
{
};

#else
#error No default localisation model defined
#endif

#ifdef BOOST_HAS_ABI_HEADERS
#  include BOOST_ABI_SUFFIX
#endif

} // namespace boost

#endif // include