1 | /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8 |
2 | // codecvt_null.cpp |
3 | |
4 | // Copyright (c) 2004 Robert Ramey, Indiana University (garcia@osl.iu.edu) |
5 | // Andrew Lumsdaine, Indiana University (lums@osl.iu.edu). |
6 | // Use, modification and distribution is subject to the Boost Software |
7 | // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
8 | // http://www.boost.org/LICENSE_1_0.txt) |
9 | |
10 | #define BOOST_WARCHIVE_SOURCE |
11 | #include <boost/serialization/config.hpp> |
12 | #include <boost/archive/codecvt_null.hpp> |
13 | |
14 | // codecvt implementation for passing wchar_t objects to char output |
15 | // without any translation whatever. Used to implement binary output |
16 | // of wchar_t objects. |
17 | |
18 | namespace boost { |
19 | namespace archive { |
20 | |
21 | BOOST_SYMBOL_EXPORT std::codecvt_base::result |
22 | codecvt_null<wchar_t>::do_out( |
23 | std::mbstate_t & /*state*/, |
24 | const wchar_t * first1, |
25 | const wchar_t * last1, |
26 | const wchar_t * & next1, |
27 | char * first2, |
28 | char * last2, |
29 | char * & next2 |
30 | ) const { |
31 | while(first1 != last1){ |
32 | // Per std::22.2.1.5.2/2, we can store no more that |
33 | // last2-first2 characters. If we need to more encode |
34 | // next internal char type, return 'partial'. |
35 | if(static_cast<int>(sizeof(wchar_t)) > (last2 - first2)){ |
36 | next1 = first1; |
37 | next2 = first2; |
38 | return std::codecvt_base::partial; |
39 | } |
40 | * reinterpret_cast<wchar_t *>(first2) = * first1++; |
41 | first2 += sizeof(wchar_t); |
42 | |
43 | } |
44 | next1 = first1; |
45 | next2 = first2; |
46 | return std::codecvt_base::ok; |
47 | } |
48 | |
49 | BOOST_SYMBOL_EXPORT std::codecvt_base::result |
50 | codecvt_null<wchar_t>::do_in( |
51 | std::mbstate_t & /*state*/, |
52 | const char * first1, |
53 | const char * last1, |
54 | const char * & next1, |
55 | wchar_t * first2, |
56 | wchar_t * last2, |
57 | wchar_t * & next2 |
58 | ) const { |
59 | // Process input characters until we've run of them, |
60 | // or the number of remaining characters is not |
61 | // enough to construct another output character, |
62 | // or we've run out of place for output characters. |
63 | while(first2 != last2){ |
64 | // Have we converted all input characters? |
65 | // Return with 'ok', if so. |
66 | if (first1 == last1) |
67 | break; |
68 | // Do we have less input characters than needed |
69 | // for a single output character? |
70 | if(static_cast<int>(sizeof(wchar_t)) > (last1 - first1)){ |
71 | next1 = first1; |
72 | next2 = first2; |
73 | return std::codecvt_base::partial; |
74 | } |
75 | *first2++ = * reinterpret_cast<const wchar_t *>(first1); |
76 | first1 += sizeof(wchar_t); |
77 | } |
78 | next1 = first1; |
79 | next2 = first2; |
80 | return std::codecvt_base::ok; |
81 | } |
82 | |
83 | BOOST_SYMBOL_EXPORT codecvt_null<wchar_t>::codecvt_null(std::size_t no_locale_manage) : |
84 | std::codecvt<wchar_t, char, std::mbstate_t>(no_locale_manage) |
85 | {} |
86 | |
87 | BOOST_SYMBOL_EXPORT codecvt_null<wchar_t>::~codecvt_null() |
88 | {} |
89 | |
90 | } // namespace archive |
91 | } // namespace boost |
92 | |