1 // filesystem windows_file_codecvt.cpp -----------------------------------------//
2
3 // Copyright Beman Dawes 2009
4
5 // Distributed under the Boost Software License, Version 1.0.
6 // See http://www.boost.org/LICENSE_1_0.txt
7
8 // Library home page: http://www.boost.org/libs/filesystem
9
10 //--------------------------------------------------------------------------------------//
11
12 #include "platform_config.hpp"
13
14 #include <cwchar> // for mbstate_t
15
16 #ifdef BOOST_WINDOWS_API
17
18 #include "windows_file_codecvt.hpp"
19
20 #include <windows.h>
21
do_in(std::mbstate_t &,const char * from,const char * from_end,const char * & from_next,wchar_t * to,wchar_t * to_end,wchar_t * & to_next) const22 std::codecvt_base::result windows_file_codecvt::do_in(
23 std::mbstate_t &,
24 const char* from, const char* from_end, const char*& from_next,
25 wchar_t* to, wchar_t* to_end, wchar_t*& to_next) const
26 {
27 UINT codepage = AreFileApisANSI() ? CP_ACP : CP_OEMCP;
28
29 int count;
30 if ((count = ::MultiByteToWideChar(codepage, MB_PRECOMPOSED, from,
31 static_cast<int>(from_end - from), to, static_cast<int>(to_end - to))) == 0)
32 {
33 return error; // conversion failed
34 }
35
36 from_next = from_end;
37 to_next = to + count;
38 *to_next = L'\0';
39 return ok;
40 }
41
do_out(std::mbstate_t &,const wchar_t * from,const wchar_t * from_end,const wchar_t * & from_next,char * to,char * to_end,char * & to_next) const42 std::codecvt_base::result windows_file_codecvt::do_out(
43 std::mbstate_t &,
44 const wchar_t* from, const wchar_t* from_end, const wchar_t* & from_next,
45 char* to, char* to_end, char* & to_next) const
46 {
47 UINT codepage = AreFileApisANSI() ? CP_ACP : CP_OEMCP;
48
49 int count;
50 if ((count = ::WideCharToMultiByte(codepage, WC_NO_BEST_FIT_CHARS, from,
51 static_cast<int>(from_end - from), to, static_cast<int>(to_end - to), 0, 0)) == 0)
52 {
53 return error; // conversion failed
54 }
55
56 from_next = from_end;
57 to_next = to + count;
58 *to_next = '\0';
59 return ok;
60 }
61
62 #endif // BOOST_WINDOWS_API
63