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1 | #ifndef BOOST_SYSTEM_DETAIL_SYSTEM_CATEGORY_MESSAGE_WIN32_HPP_INCLUDED |
2 | #define BOOST_SYSTEM_DETAIL_SYSTEM_CATEGORY_MESSAGE_WIN32_HPP_INCLUDED | |
3 | ||
4 | // Copyright Beman Dawes 2002, 2006 | |
5 | // Copyright (c) Microsoft Corporation 2014 | |
6 | // Copyright 2018, 2020 Peter Dimov | |
7 | // | |
8 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
9 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
10 | // | |
11 | // See library home page at http://www.boost.org/libs/system | |
12 | ||
1e59de90 | 13 | #include <boost/system/detail/snprintf.hpp> |
20effc67 TL |
14 | #include <boost/winapi/error_handling.hpp> |
15 | #include <boost/winapi/character_code_conversion.hpp> | |
16 | #include <boost/winapi/local_memory.hpp> | |
17 | #include <boost/config.hpp> | |
18 | #include <cstdio> | |
19 | ||
20 | // | |
21 | ||
22 | namespace boost | |
23 | { | |
24 | ||
25 | namespace system | |
26 | { | |
27 | ||
28 | namespace detail | |
29 | { | |
30 | ||
20effc67 TL |
31 | inline char const * unknown_message_win32( int ev, char * buffer, std::size_t len ) |
32 | { | |
1e59de90 | 33 | detail::snprintf( buffer, len, "Unknown error (%d)", ev ); |
20effc67 | 34 | return buffer; |
20effc67 TL |
35 | } |
36 | ||
20effc67 TL |
37 | inline boost::winapi::UINT_ message_cp_win32() |
38 | { | |
39 | #if defined(BOOST_SYSTEM_USE_UTF8) | |
40 | ||
41 | return boost::winapi::CP_UTF8_; | |
42 | ||
43 | #else | |
44 | ||
45 | return boost::winapi::CP_ACP_; | |
46 | ||
47 | #endif | |
48 | } | |
49 | ||
50 | inline char const * system_category_message_win32( int ev, char * buffer, std::size_t len ) BOOST_NOEXCEPT | |
51 | { | |
52 | if( len == 0 ) | |
53 | { | |
54 | return buffer; | |
55 | } | |
56 | ||
57 | if( len == 1 ) | |
58 | { | |
59 | buffer[0] = 0; | |
60 | return buffer; | |
61 | } | |
62 | ||
63 | boost::winapi::UINT_ const code_page = message_cp_win32(); | |
64 | ||
65 | int r = 0; | |
66 | ||
67 | #if !defined(BOOST_NO_ANSI_APIS) | |
68 | ||
69 | if( code_page == boost::winapi::CP_ACP_ ) | |
70 | { | |
71 | using namespace boost::winapi; | |
72 | ||
73 | DWORD_ retval = boost::winapi::FormatMessageA( | |
74 | FORMAT_MESSAGE_FROM_SYSTEM_ | FORMAT_MESSAGE_IGNORE_INSERTS_, | |
75 | NULL, | |
76 | ev, | |
77 | MAKELANGID_( LANG_NEUTRAL_, SUBLANG_DEFAULT_ ), // Default language | |
78 | buffer, | |
79 | static_cast<DWORD_>( len ), | |
80 | NULL | |
81 | ); | |
82 | ||
83 | r = static_cast<int>( retval ); | |
84 | } | |
85 | else | |
86 | ||
87 | #endif | |
88 | ||
89 | { | |
90 | using namespace boost::winapi; | |
91 | ||
92 | wchar_t * lpMsgBuf = 0; | |
93 | ||
94 | DWORD_ retval = boost::winapi::FormatMessageW( | |
95 | FORMAT_MESSAGE_ALLOCATE_BUFFER_ | FORMAT_MESSAGE_FROM_SYSTEM_ | FORMAT_MESSAGE_IGNORE_INSERTS_, | |
96 | NULL, | |
97 | ev, | |
98 | MAKELANGID_( LANG_NEUTRAL_, SUBLANG_DEFAULT_ ), // Default language | |
99 | (LPWSTR_) &lpMsgBuf, | |
100 | 0, | |
101 | NULL | |
102 | ); | |
103 | ||
104 | if( retval != 0 ) | |
105 | { | |
106 | r = boost::winapi::WideCharToMultiByte( code_page, 0, lpMsgBuf, -1, buffer, static_cast<int>( len ), NULL, NULL ); | |
107 | boost::winapi::LocalFree( lpMsgBuf ); | |
108 | if ( r != 0 ) --r; // exclude null terminator | |
109 | } | |
110 | } | |
111 | ||
112 | if( r == 0 ) | |
113 | { | |
114 | return unknown_message_win32( ev, buffer, len ); | |
115 | } | |
116 | ||
117 | while( r > 0 && ( buffer[ r-1 ] == '\n' || buffer[ r-1 ] == '\r' ) ) | |
118 | { | |
119 | buffer[ --r ] = 0; | |
120 | } | |
121 | ||
122 | if( r > 0 && buffer[ r-1 ] == '.' ) | |
123 | { | |
124 | buffer[ --r ] = 0; | |
125 | } | |
126 | ||
127 | return buffer; | |
128 | } | |
129 | ||
130 | struct local_free | |
131 | { | |
132 | void * p_; | |
133 | ||
134 | ~local_free() | |
135 | { | |
136 | boost::winapi::LocalFree( p_ ); | |
137 | } | |
138 | }; | |
139 | ||
140 | inline std::string unknown_message_win32( int ev ) | |
141 | { | |
142 | char buffer[ 38 ]; | |
143 | return unknown_message_win32( ev, buffer, sizeof( buffer ) ); | |
144 | } | |
145 | ||
146 | inline std::string system_category_message_win32( int ev ) | |
147 | { | |
148 | using namespace boost::winapi; | |
149 | ||
150 | wchar_t * lpMsgBuf = 0; | |
151 | ||
152 | DWORD_ retval = boost::winapi::FormatMessageW( | |
153 | FORMAT_MESSAGE_ALLOCATE_BUFFER_ | FORMAT_MESSAGE_FROM_SYSTEM_ | FORMAT_MESSAGE_IGNORE_INSERTS_, | |
154 | NULL, | |
155 | ev, | |
156 | MAKELANGID_( LANG_NEUTRAL_, SUBLANG_DEFAULT_ ), // Default language | |
157 | (LPWSTR_) &lpMsgBuf, | |
158 | 0, | |
159 | NULL | |
160 | ); | |
161 | ||
162 | if( retval == 0 ) | |
163 | { | |
164 | return unknown_message_win32( ev ); | |
165 | } | |
166 | ||
167 | local_free lf_ = { lpMsgBuf }; | |
168 | (void)lf_; | |
169 | ||
170 | UINT_ const code_page = message_cp_win32(); | |
171 | ||
172 | int r = boost::winapi::WideCharToMultiByte( code_page, 0, lpMsgBuf, -1, 0, 0, NULL, NULL ); | |
173 | ||
174 | if( r == 0 ) | |
175 | { | |
176 | return unknown_message_win32( ev ); | |
177 | } | |
178 | ||
179 | std::string buffer( r, char() ); | |
180 | ||
181 | r = boost::winapi::WideCharToMultiByte( code_page, 0, lpMsgBuf, -1, &buffer[0], r, NULL, NULL ); | |
182 | ||
183 | if( r == 0 ) | |
184 | { | |
185 | return unknown_message_win32( ev ); | |
186 | } | |
187 | ||
188 | --r; // exclude null terminator | |
189 | ||
190 | while( r > 0 && ( buffer[ r-1 ] == '\n' || buffer[ r-1 ] == '\r' ) ) | |
191 | { | |
192 | --r; | |
193 | } | |
194 | ||
195 | if( r > 0 && buffer[ r-1 ] == '.' ) | |
196 | { | |
197 | --r; | |
198 | } | |
199 | ||
200 | buffer.resize( r ); | |
201 | ||
202 | return buffer; | |
203 | } | |
204 | ||
205 | } // namespace detail | |
206 | ||
207 | } // namespace system | |
208 | ||
209 | } // namespace boost | |
210 | ||
211 | #endif // #ifndef BOOST_SYSTEM_DETAIL_SYSTEM_CATEGORY_MESSAGE_WIN32_HPP_INCLUDED |