libstdc++
messages_members.h
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1 // std::messages implementation details, GNU version -*- C++ -*-
2 
3 // Copyright (C) 2001-2015 Free Software Foundation, Inc.
4 //
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
9 // any later version.
10 
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
15 
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
19 
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
24 
25 /** @file bits/messages_members.h
26  * This is an internal header file, included by other library headers.
27  * Do not attempt to use it directly. @headername{locale}
28  */
29 
30 //
31 // ISO C++ 14882: 22.2.7.1.2 messages functions
32 //
33 
34 // Written by Benjamin Kosnik <[email protected]>
35 
36 #include <libintl.h>
37 
38 namespace std _GLIBCXX_VISIBILITY(default)
39 {
40 _GLIBCXX_BEGIN_NAMESPACE_VERSION
41 
42  // Non-virtual member functions.
43  template<typename _CharT>
45  : facet(__refs), _M_c_locale_messages(_S_get_c_locale()),
46  _M_name_messages(_S_get_c_name())
47  { }
48 
49  template<typename _CharT>
50  messages<_CharT>::messages(__c_locale __cloc, const char* __s,
51  size_t __refs)
52  : facet(__refs), _M_c_locale_messages(0), _M_name_messages(0)
53  {
54  if (__builtin_strcmp(__s, _S_get_c_name()) != 0)
55  {
56  const size_t __len = __builtin_strlen(__s) + 1;
57  char* __tmp = new char[__len];
58  __builtin_memcpy(__tmp, __s, __len);
59  _M_name_messages = __tmp;
60  }
61  else
62  _M_name_messages = _S_get_c_name();
63 
64  // Last to avoid leaking memory if new throws.
65  _M_c_locale_messages = _S_clone_c_locale(__cloc);
66  }
67 
68  template<typename _CharT>
69  typename messages<_CharT>::catalog
70  messages<_CharT>::open(const basic_string<char>& __s, const locale& __loc,
71  const char* __dir) const
72  {
73  bindtextdomain(__s.c_str(), __dir);
74  return this->do_open(__s, __loc);
75  }
76 
77  // Virtual member functions.
78  template<typename _CharT>
80  {
81  if (_M_name_messages != _S_get_c_name())
82  delete [] _M_name_messages;
83  _S_destroy_c_locale(_M_c_locale_messages);
84  }
85 
86  template<typename _CharT>
87  typename messages<_CharT>::catalog
89  const locale&) const
90  {
91  // No error checking is done, assume the catalog exists and can
92  // be used.
93  textdomain(__s.c_str());
94  return 0;
95  }
96 
97  template<typename _CharT>
98  void
99  messages<_CharT>::do_close(catalog) const
100  { }
101 
102  // messages_byname
103  template<typename _CharT>
104  messages_byname<_CharT>::messages_byname(const char* __s, size_t __refs)
105  : messages<_CharT>(__refs)
106  {
107  if (this->_M_name_messages != locale::facet::_S_get_c_name())
108  {
109  delete [] this->_M_name_messages;
110  if (__builtin_strcmp(__s, locale::facet::_S_get_c_name()) != 0)
111  {
112  const size_t __len = __builtin_strlen(__s) + 1;
113  char* __tmp = new char[__len];
114  __builtin_memcpy(__tmp, __s, __len);
115  this->_M_name_messages = __tmp;
116  }
117  else
118  this->_M_name_messages = locale::facet::_S_get_c_name();
119  }
120 
121  if (__builtin_strcmp(__s, "C") != 0
122  && __builtin_strcmp(__s, "POSIX") != 0)
123  {
124  this->_S_destroy_c_locale(this->_M_c_locale_messages);
125  this->_S_create_c_locale(this->_M_c_locale_messages, __s);
126  }
127  }
128 
129  //Specializations.
130  template<>
131  typename messages<char>::catalog
133  const locale&) const;
134 
135  template<>
136  void
137  messages<char>::do_close(catalog) const;
138 
139 #ifdef _GLIBCXX_USE_WCHAR_T
140  template<>
141  typename messages<wchar_t>::catalog
143  const locale&) const;
144 
145  template<>
146  void
147  messages<wchar_t>::do_close(catalog) const;
148 #endif
149 
150 _GLIBCXX_END_NAMESPACE_VERSION
151 } // namespace
Primary class template messages.This facet encapsulates the code to retrieve messages from message ca...
messages(size_t __refs=0)
Constructor performs initialization.
const _CharT * c_str() const noexcept
Return const pointer to null-terminated contents.
virtual ~messages()
Destructor.
class messages_byname [22.2.7.2].
Container class for localization functionality.The locale class is first a class wrapper for C librar...
ISO C++ entities toplevel namespace is std.
facet(size_t __refs=0)
Facet constructor.