boost/archive/codecvt_null.hpp

   1 #ifndef BOOST_ARCHIVE_CODECVT_NULL_HPP
   2 #define BOOST_ARCHIVE_CODECVT_NULL_HPP
   3
   4 // MS compatible compilers support #pragma once
   5 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
   6 # pragma once
   7 #endif
   8
   9 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
  10 // codecvt_null.hpp:
  11
  12 // (C) Copyright 2004 Robert Ramey - http://www.rrsd.com .
  13 // Use, modification and distribution is subject to the Boost Software
  14 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  15 // http://www.boost.org/LICENSE_1_0.txt)
  16
  17 //  See http://www.boost.org for updates, documentation, and revision history.
  18
  19 #include <locale>
  20 #include <cstddef> // NULL, size_t
  21 #include <cwchar>   // for mbstate_t
  22 #include <boost/config.hpp>
  23 #include <boost/archive/detail/auto_link_archive.hpp>
  24 #include <boost/archive/detail/abi_prefix.hpp> // must be the last header
  25
  26 #if defined(BOOST_NO_STDC_NAMESPACE)
  27 // For STLport on WinCE, BOOST_NO_STDC_NAMESPACE can get defined if STLport is putting symbols in its own namespace.
  28 // In the case of codecvt, however, this does not mean that codecvt is in the global namespace (it will be in STLport's namespace)
  29 #  if !defined(UNDER_CE) || (!defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION))
  30     using ::codecvt;
  31 #  endif
  32     using ::mbstate_t;
  33     using ::size_t;
  34 #endif
  35
  36 namespace boost {
  37 namespace archive {
  38
  39 template<class Ch>
  40 class codecvt_null;
  41
  42 template<>
  43 class codecvt_null<char> : public std::codecvt<char, char, std::mbstate_t>
  44 {
  45     virtual bool do_always_noconv() const throw() {
  46         return true;
  47     }
  48 public:
  49     explicit codecvt_null(std::size_t no_locale_manage = 0) :
  50         std::codecvt<char, char, std::mbstate_t>(no_locale_manage)
  51     {}
  52 };
  53
  54 template<>
  55 class codecvt_null<wchar_t> : public std::codecvt<wchar_t, char, std::mbstate_t>
  56 {
  57     virtual BOOST_WARCHIVE_DECL(std::codecvt_base::result)
  58     do_out(
  59         std::mbstate_t & state,
  60         const wchar_t * first1,
  61         const wchar_t * last1,
  62         const wchar_t * & next1,
  63         char * first2,
  64         char * last2,
  65         char * & next2
  66     ) const;
  67     virtual BOOST_WARCHIVE_DECL(std::codecvt_base::result)
  68     do_in(
  69         std::mbstate_t & state,
  70         const char * first1,
  71         const char * last1,
  72         const char * & next1,
  73         wchar_t * first2,
  74         wchar_t * last2,
  75         wchar_t * & next2
  76     ) const;
  77     virtual int do_encoding( ) const throw( ){
  78         return sizeof(wchar_t) / sizeof(char);
  79     }
  80     virtual int do_max_length( ) const throw( ){
  81         return do_encoding();
  82     }
  83 };
  84
  85 } // namespace archive
  86 } // namespace boost
  87
  88 #include <boost/archive/detail/abi_suffix.hpp> // pop pragmas
  89
  90 #endif //BOOST_ARCHIVE_CODECVT_NULL_HPP