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)
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 namespace std {
28 // For STLport on WinCE, BOOST_NO_STDC_NAMESPACE can get defined if STLport is putting symbols in its own namespace.
29 // In the case of codecvt, however, this does not mean that codecvt is in the global namespace (it will be in STLport's namespace)
30 #  if !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
31     using ::codecvt;
32 #  endif
33     using ::mbstate_t;
34     using ::size_t;
35 } // namespace
36 #endif
37 
38 #ifdef BOOST_MSVC
39 #  pragma warning(push)
40 #  pragma warning(disable : 4511 4512)
41 #endif
42 
43 namespace boost {
44 namespace archive {
45 
46 template<class Ch>
47 class codecvt_null;
48 
49 template<>
50 class codecvt_null<char> : public std::codecvt<char, char, std::mbstate_t>
51 {
do_always_noconv() const52     virtual bool do_always_noconv() const throw() {
53         return true;
54     }
55 public:
codecvt_null(std::size_t no_locale_manage=0)56     explicit codecvt_null(std::size_t no_locale_manage = 0) :
57         std::codecvt<char, char, std::mbstate_t>(no_locale_manage)
58     {}
59 };
60 
61 template<>
62 class codecvt_null<wchar_t> : public std::codecvt<wchar_t, char, std::mbstate_t>
63 {
64     virtual BOOST_WARCHIVE_DECL std::codecvt_base::result
65     do_out(
66         std::mbstate_t & state,
67         const wchar_t * first1,
68         const wchar_t * last1,
69         const wchar_t * & next1,
70         char * first2,
71         char * last2,
72         char * & next2
73     ) const;
74     virtual BOOST_WARCHIVE_DECL std::codecvt_base::result
75     do_in(
76         std::mbstate_t & state,
77         const char * first1,
78         const char * last1,
79         const char * & next1,
80         wchar_t * first2,
81         wchar_t * last2,
82         wchar_t * & next2
83     ) const;
do_encoding() const84     virtual int do_encoding( ) const throw( ){
85         return sizeof(wchar_t) / sizeof(char);
86     }
do_max_length() const87     virtual int do_max_length( ) const throw( ){
88         return do_encoding();
89     }
90 public:
codecvt_null(std::size_t no_locale_manage=0)91     explicit codecvt_null(std::size_t no_locale_manage = 0) :
92         std::codecvt<wchar_t, char, std::mbstate_t>(no_locale_manage)
93     {}
94 };
95 
96 } // namespace archive
97 } // namespace boost
98 
99 #ifdef BOOST_MSVC
100 #  pragma warning(pop)
101 #endif
102 #include <boost/archive/detail/abi_suffix.hpp> // pop pragmas
103 
104 #endif //BOOST_ARCHIVE_CODECVT_NULL_HPP
105