1 // Copyright (C) 1997-2013 Free Software Foundation, Inc.
3 // This file is part of the GNU ISO C++ Library. This library is free
4 // software; you can redistribute it and/or modify it under the
5 // terms of the GNU General Public License as published by the
6 // Free Software Foundation; either version 3, or (at your option)
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // Under Section 7 of GPL version 3, you are granted additional
15 // permissions described in the GCC Runtime Library Exception, version
16 // 3.1, as published by the Free Software Foundation.
18 // You should have received a copy of the GNU General Public License and
19 // a copy of the GCC Runtime Library Exception along with this program;
20 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
21 // <http://www.gnu.org/licenses/>.
28 namespace std _GLIBCXX_VISIBILITY(default)
30 _GLIBCXX_BEGIN_NAMESPACE_VERSION
32 using namespace __gnu_cxx;
34 locale::locale(const char* __s) : _M_impl(0)
39 if (std::strcmp(__s, "C") == 0 || std::strcmp(__s, "POSIX") == 0)
40 (_M_impl = _S_classic)->_M_add_reference();
41 else if (std::strcmp(__s, "") != 0)
42 _M_impl = new _Impl(__s, 1);
45 // Get it from the environment.
46 char* __env = std::getenv("LC_ALL");
47 // If LC_ALL is set we are done.
48 if (__env && std::strcmp(__env, "") != 0)
50 if (std::strcmp(__env, "C") == 0
51 || std::strcmp(__env, "POSIX") == 0)
52 (_M_impl = _S_classic)->_M_add_reference();
54 _M_impl = new _Impl(__env, 1);
58 // LANG may set a default different from "C".
60 __env = std::getenv("LANG");
61 if (!__env || std::strcmp(__env, "") == 0
62 || std::strcmp(__env, "C") == 0
63 || std::strcmp(__env, "POSIX") == 0)
68 // Scan the categories looking for the first one
69 // different from LANG.
72 for (; __i < _S_categories_size; ++__i)
74 __env = std::getenv(_S_categories[__i]);
75 if (__env && std::strcmp(__env, "") != 0
76 && std::strcmp(__env, "C") != 0
77 && std::strcmp(__env, "POSIX") != 0)
81 for (; __i < _S_categories_size; ++__i)
83 __env = std::getenv(_S_categories[__i]);
84 if (__env && std::strcmp(__env, "") != 0
89 // If one is found, build the complete string of
90 // the form LC_CTYPE=xxx;LC_NUMERIC=yyy; and so on...
91 if (__i < _S_categories_size)
95 for (size_t __j = 0; __j < __i; ++__j)
97 __str += _S_categories[__j];
102 __str += _S_categories[__i];
107 for (; __i < _S_categories_size; ++__i)
109 __env = std::getenv(_S_categories[__i]);
110 __str += _S_categories[__i];
111 if (!__env || std::strcmp(__env, "") == 0)
117 else if (std::strcmp(__env, "C") == 0
118 || std::strcmp(__env, "POSIX") == 0)
127 __str.erase(__str.end() - 1);
128 _M_impl = new _Impl(__str.c_str(), 1);
130 // ... otherwise either an additional instance of
131 // the "C" locale or LANG.
132 else if (__lang == "C")
133 (_M_impl = _S_classic)->_M_add_reference();
135 _M_impl = new _Impl(__lang.c_str(), 1);
140 __throw_runtime_error(__N("locale::locale null not valid"));
143 locale::locale(const locale& __base, const char* __s, category __cat)
146 // NB: There are complicated, yet more efficient ways to do
147 // this. Building up locales on a per-category way is tedious, so
148 // let's do it this way until people complain.
150 _M_coalesce(__base, __add, __cat);
153 locale::locale(const locale& __base, const locale& __add, category __cat)
155 { _M_coalesce(__base, __add, __cat); }
158 locale::_M_coalesce(const locale& __base, const locale& __add,
161 __cat = _S_normalize_category(__cat);
162 _M_impl = new _Impl(*__base._M_impl, 1);
165 { _M_impl->_M_replace_categories(__add._M_impl, __cat); }
168 _M_impl->_M_remove_reference();
169 __throw_exception_again;
173 // Construct named _Impl.
175 _Impl(const char* __s, size_t __refs)
176 : _M_refcount(__refs), _M_facets(0), _M_facets_size(_GLIBCXX_NUM_FACETS),
177 _M_caches(0), _M_names(0)
179 // Initialize the underlying locale model, which also checks to
180 // see if the given name is valid.
182 locale::facet::_S_create_c_locale(__cloc, __s);
183 __c_locale __clocm = __cloc;
187 _M_facets = new const facet*[_M_facets_size];
188 for (size_t __i = 0; __i < _M_facets_size; ++__i)
190 _M_caches = new const facet*[_M_facets_size];
191 for (size_t __j = 0; __j < _M_facets_size; ++__j)
193 _M_names = new char*[_S_categories_size];
194 for (size_t __k = 0; __k < _S_categories_size; ++__k)
197 // Name the categories.
198 const char* __smon = __s;
199 const size_t __len = std::strlen(__s);
200 if (!std::memchr(__s, ';', __len))
202 _M_names[0] = new char[__len + 1];
203 std::memcpy(_M_names[0], __s, __len + 1);
207 const char* __end = __s;
208 bool __found_ctype = false;
209 bool __found_monetary = false;
210 size_t __ci = 0, __mi = 0;
211 for (size_t __i = 0; __i < _S_categories_size; ++__i)
213 const char* __beg = std::strchr(__end + 1, '=') + 1;
214 __end = std::strchr(__beg, ';');
217 _M_names[__i] = new char[__end - __beg + 1];
218 std::memcpy(_M_names[__i], __beg, __end - __beg);
219 _M_names[__i][__end - __beg] = '\0';
221 && *(__beg - 2) == 'E' && *(__beg - 3) == 'P')
223 __found_ctype = true;
226 else if (!__found_monetary && *(__beg - 2) == 'Y')
228 __found_monetary = true;
233 if (std::strcmp(_M_names[__ci], _M_names[__mi]))
235 __smon = _M_names[__mi];
236 __clocm = locale::facet::_S_lc_ctype_c_locale(__cloc,
241 // Construct all standard facets and add them to _M_facets.
242 _M_init_facet(new std::ctype<char>(__cloc, 0, false));
243 _M_init_facet(new codecvt<char, char, mbstate_t>(__cloc));
244 _M_init_facet(new numpunct<char>(__cloc));
245 _M_init_facet(new num_get<char>);
246 _M_init_facet(new num_put<char>);
247 _M_init_facet(new std::collate<char>(__cloc));
248 _M_init_facet(new moneypunct<char, false>(__cloc, 0));
249 _M_init_facet(new moneypunct<char, true>(__cloc, 0));
250 _M_init_facet(new money_get<char>);
251 _M_init_facet(new money_put<char>);
252 _M_init_facet(new __timepunct<char>(__cloc, __s));
253 _M_init_facet(new time_get<char>);
254 _M_init_facet(new time_put<char>);
255 _M_init_facet(new std::messages<char>(__cloc, __s));
257 #ifdef _GLIBCXX_USE_WCHAR_T
258 _M_init_facet(new std::ctype<wchar_t>(__cloc));
259 _M_init_facet(new codecvt<wchar_t, char, mbstate_t>(__cloc));
260 _M_init_facet(new numpunct<wchar_t>(__cloc));
261 _M_init_facet(new num_get<wchar_t>);
262 _M_init_facet(new num_put<wchar_t>);
263 _M_init_facet(new std::collate<wchar_t>(__cloc));
264 _M_init_facet(new moneypunct<wchar_t, false>(__clocm, __smon));
265 _M_init_facet(new moneypunct<wchar_t, true>(__clocm, __smon));
266 _M_init_facet(new money_get<wchar_t>);
267 _M_init_facet(new money_put<wchar_t>);
268 _M_init_facet(new __timepunct<wchar_t>(__cloc, __s));
269 _M_init_facet(new time_get<wchar_t>);
270 _M_init_facet(new time_put<wchar_t>);
271 _M_init_facet(new std::messages<wchar_t>(__cloc, __s));
273 locale::facet::_S_destroy_c_locale(__cloc);
274 if (__clocm != __cloc)
275 locale::facet::_S_destroy_c_locale(__clocm);
279 locale::facet::_S_destroy_c_locale(__cloc);
280 if (__clocm != __cloc)
281 locale::facet::_S_destroy_c_locale(__clocm);
283 __throw_exception_again;
289 _M_replace_categories(const _Impl* __imp, category __cat)
292 if (!_M_names[0] || !__imp->_M_names[0])
296 delete [] _M_names[0];
297 _M_names[0] = 0; // Unnamed.
300 for (size_t __ix = 0; __ix < _S_categories_size; ++__ix, __mask <<= 1)
303 // Need to replace entry in _M_facets with other locale's info.
304 _M_replace_category(__imp, _S_facet_categories[__ix]);
311 // A full set of _M_names must be prepared, all identical
312 // to _M_names[0] to begin with. Then, below, a few will
313 // be replaced by the corresponding __imp->_M_names. I.e.,
314 // not a "simple" locale anymore (see locale::operator==).
315 const size_t __len = std::strlen(_M_names[0]) + 1;
316 for (size_t __i = 1; __i < _S_categories_size; ++__i)
318 _M_names[__i] = new char[__len];
319 std::memcpy(_M_names[__i], _M_names[0], __len);
323 for (size_t __ix = 0; __ix < _S_categories_size; ++__ix, __mask <<= 1)
327 // Need to replace entry in _M_facets with other locale's info.
328 _M_replace_category(__imp, _S_facet_categories[__ix]);
330 // FIXME: Hack for libstdc++/29217: the numerical encodings
331 // of the time and collate categories are swapped vs the
332 // order of the names in locale::_S_categories. We'd like to
333 // adjust the former (the latter is dictated by compatibility
334 // with glibc) but we can't for binary compatibility.
335 size_t __ix_name = __ix;
336 if (__ix == 2 || __ix == 3)
337 __ix_name = 5 - __ix;
339 char* __src = __imp->_M_names[__ix_name] ?
340 __imp->_M_names[__ix_name] : __imp->_M_names[0];
341 const size_t __len = std::strlen(__src) + 1;
342 char* __new = new char[__len];
343 std::memcpy(__new, __src, __len);
344 delete [] _M_names[__ix_name];
345 _M_names[__ix_name] = __new;
351 _GLIBCXX_END_NAMESPACE_VERSION