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8d9254fc 1// Copyright (C) 1997-2020 Free Software Foundation, Inc.
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2//
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
748086b7 6// Free Software Foundation; either version 3, or (at your option)
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7// any later version.
8
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.
13
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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.
b2dad0e3 17
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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/>.
b2dad0e3 22
34a2b755 23#define _GLIBCXX_USE_CXX11_ABI 1
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24#include <clocale>
25#include <cstring>
4ba851b5 26#include <cstdlib>
54c1bf78 27#include <locale>
b2dad0e3 28
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29namespace std _GLIBCXX_VISIBILITY(default)
30{
31_GLIBCXX_BEGIN_NAMESPACE_VERSION
3cbc7af0 32
a7817e1d 33 using namespace __gnu_cxx;
d3a193e3 34
26c691a8 35 locale::locale(const char* __s) : _M_impl(0)
e4cc8659 36 {
c755e77d 37 if (__s)
91675f9d 38 {
f92ab29f 39 _S_initialize();
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40 if (std::strcmp(__s, "C") == 0 || std::strcmp(__s, "POSIX") == 0)
41 (_M_impl = _S_classic)->_M_add_reference();
42 else if (std::strcmp(__s, "") != 0)
43 _M_impl = new _Impl(__s, 1);
44 else
91675f9d 45 {
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46 // Get it from the environment.
47 char* __env = std::getenv("LC_ALL");
48 // If LC_ALL is set we are done.
49 if (__env && std::strcmp(__env, "") != 0)
50 {
f92ab29f 51 if (std::strcmp(__env, "C") == 0
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52 || std::strcmp(__env, "POSIX") == 0)
53 (_M_impl = _S_classic)->_M_add_reference();
54 else
55 _M_impl = new _Impl(__env, 1);
56 }
57 else
58 {
c755e77d 59 // LANG may set a default different from "C".
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60 string __lang;
61 __env = std::getenv("LANG");
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62 if (!__env || std::strcmp(__env, "") == 0
63 || std::strcmp(__env, "C") == 0
c755e77d 64 || std::strcmp(__env, "POSIX") == 0)
17c08c32 65 __lang = "C";
f92ab29f 66 else
17c08c32 67 __lang = __env;
f92ab29f 68
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69 // Scan the categories looking for the first one
70 // different from LANG.
71 size_t __i = 0;
17c08c32 72 if (__lang == "C")
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73 for (; __i < _S_categories_size; ++__i)
74 {
75 __env = std::getenv(_S_categories[__i]);
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76 if (__env && std::strcmp(__env, "") != 0
77 && std::strcmp(__env, "C") != 0
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78 && std::strcmp(__env, "POSIX") != 0)
79 break;
80 }
81 else
82 for (; __i < _S_categories_size; ++__i)
83 {
84 __env = std::getenv(_S_categories[__i]);
85 if (__env && std::strcmp(__env, "") != 0
17c08c32 86 && __lang != __env)
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87 break;
88 }
f92ab29f 89
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90 // If one is found, build the complete string of
91 // the form LC_CTYPE=xxx;LC_NUMERIC=yyy; and so on...
92 if (__i < _S_categories_size)
93 {
94 string __str;
4df9c41d 95 __str.reserve(128);
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96 for (size_t __j = 0; __j < __i; ++__j)
97 {
98 __str += _S_categories[__j];
99 __str += '=';
17c08c32 100 __str += __lang;
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101 __str += ';';
102 }
103 __str += _S_categories[__i];
104 __str += '=';
105 __str += __env;
106 __str += ';';
17c08c32 107 ++__i;
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108 for (; __i < _S_categories_size; ++__i)
109 {
110 __env = std::getenv(_S_categories[__i]);
17c08c32 111 __str += _S_categories[__i];
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112 if (!__env || std::strcmp(__env, "") == 0)
113 {
c755e77d 114 __str += '=';
17c08c32 115 __str += __lang;
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116 __str += ';';
117 }
118 else if (std::strcmp(__env, "C") == 0
119 || std::strcmp(__env, "POSIX") == 0)
17c08c32 120 __str += "=C;";
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121 else
122 {
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123 __str += '=';
124 __str += __env;
125 __str += ';';
126 }
127 }
128 __str.erase(__str.end() - 1);
129 _M_impl = new _Impl(__str.c_str(), 1);
130 }
131 // ... otherwise either an additional instance of
132 // the "C" locale or LANG.
17c08c32 133 else if (__lang == "C")
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134 (_M_impl = _S_classic)->_M_add_reference();
135 else
17c08c32 136 _M_impl = new _Impl(__lang.c_str(), 1);
c755e77d 137 }
91675f9d 138 }
73c4dcc6 139 }
c755e77d 140 else
8fc81078 141 __throw_runtime_error(__N("locale::locale null not valid"));
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142 }
143
144 locale::locale(const locale& __base, const char* __s, category __cat)
26c691a8 145 : _M_impl(0)
f92ab29f 146 {
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147 // NB: There are complicated, yet more efficient ways to do
148 // this. Building up locales on a per-category way is tedious, so
149 // let's do it this way until people complain.
150 locale __add(__s);
151 _M_coalesce(__base, __add, __cat);
152 }
153
154 locale::locale(const locale& __base, const locale& __add, category __cat)
26c691a8 155 : _M_impl(0)
3ecaae52 156 { _M_coalesce(__base, __add, __cat); }
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157
158 void
f92ab29f 159 locale::_M_coalesce(const locale& __base, const locale& __add,
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160 category __cat)
161 {
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162 __cat = _S_normalize_category(__cat);
163 _M_impl = new _Impl(*__base._M_impl, 1);
c755e77d 164
f92ab29f 165 __try
c755e77d 166 { _M_impl->_M_replace_categories(__add._M_impl, __cat); }
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167 __catch(...)
168 {
169 _M_impl->_M_remove_reference();
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170 __throw_exception_again;
171 }
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172 }
173
bb93f35d 174const int num_facets = _GLIBCXX_NUM_FACETS + _GLIBCXX_NUM_UNICODE_FACETS
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175 + (_GLIBCXX_USE_DUAL_ABI ? _GLIBCXX_NUM_CXX11_FACETS : 0);
176
d3a193e3 177 // Construct named _Impl.
22b9554c 178 locale::_Impl::
17c08c32 179 _Impl(const char* __s, size_t __refs)
34a2b755 180 : _M_refcount(__refs), _M_facets(0), _M_facets_size(num_facets),
17c08c32 181 _M_caches(0), _M_names(0)
7dc08a20 182 {
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183 // Initialize the underlying locale model, which also checks to
184 // see if the given name is valid.
def9790d 185 __c_locale __cloc;
d3a193e3 186 locale::facet::_S_create_c_locale(__cloc, __s);
c8036448 187 __c_locale __clocm = __cloc;
def9790d 188
bc2631e0 189 __try
215f9e28 190 {
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191 _M_facets = new const facet*[_M_facets_size]();
192 _M_caches = new const facet*[_M_facets_size]();
193 _M_names = new char*[_S_categories_size]();
215f9e28 194
4df9c41d 195 // Name the categories.
c8036448 196 const char* __smon = __s;
91675f9d 197 const size_t __len = std::strlen(__s);
17c08c32 198 if (!std::memchr(__s, ';', __len))
aa53f832 199 {
4df9c41d 200 _M_names[0] = new char[__len + 1];
c8036448 201 std::memcpy(_M_names[0], __s, __len + 1);
aa53f832 202 }
91675f9d 203 else
aa53f832 204 {
2d91a076 205 const char* __end = __s;
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206 bool __found_ctype = false;
207 bool __found_monetary = false;
208 size_t __ci = 0, __mi = 0;
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209 for (size_t __i = 0; __i < _S_categories_size; ++__i)
210 {
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211 const char* __beg = std::strchr(__end + 1, '=') + 1;
212 __end = std::strchr(__beg, ';');
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213 if (!__end)
214 __end = __s + __len;
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215 _M_names[__i] = new char[__end - __beg + 1];
216 std::memcpy(_M_names[__i], __beg, __end - __beg);
217 _M_names[__i][__end - __beg] = '\0';
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218 if (!__found_ctype
219 && *(__beg - 2) == 'E' && *(__beg - 3) == 'P')
220 {
221 __found_ctype = true;
222 __ci = __i;
223 }
224 else if (!__found_monetary && *(__beg - 2) == 'Y')
225 {
226 __found_monetary = true;
227 __mi = __i;
228 }
229 }
230
231 if (std::strcmp(_M_names[__ci], _M_names[__mi]))
232 {
233 __smon = _M_names[__mi];
234 __clocm = locale::facet::_S_lc_ctype_c_locale(__cloc,
235 __smon);
91675f9d 236 }
aa53f832 237 }
f92ab29f 238
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239 // Construct all standard facets and add them to _M_facets.
240 _M_init_facet(new std::ctype<char>(__cloc, 0, false));
241 _M_init_facet(new codecvt<char, char, mbstate_t>(__cloc));
242 _M_init_facet(new numpunct<char>(__cloc));
243 _M_init_facet(new num_get<char>);
244 _M_init_facet(new num_put<char>);
245 _M_init_facet(new std::collate<char>(__cloc));
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246 _M_init_facet(new moneypunct<char, false>(__cloc, 0));
247 _M_init_facet(new moneypunct<char, true>(__cloc, 0));
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248 _M_init_facet(new money_get<char>);
249 _M_init_facet(new money_put<char>);
250 _M_init_facet(new __timepunct<char>(__cloc, __s));
251 _M_init_facet(new time_get<char>);
252 _M_init_facet(new time_put<char>);
253 _M_init_facet(new std::messages<char>(__cloc, __s));
f92ab29f 254
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255#ifdef _GLIBCXX_USE_WCHAR_T
256 _M_init_facet(new std::ctype<wchar_t>(__cloc));
257 _M_init_facet(new codecvt<wchar_t, char, mbstate_t>(__cloc));
258 _M_init_facet(new numpunct<wchar_t>(__cloc));
259 _M_init_facet(new num_get<wchar_t>);
260 _M_init_facet(new num_put<wchar_t>);
261 _M_init_facet(new std::collate<wchar_t>(__cloc));
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262 _M_init_facet(new moneypunct<wchar_t, false>(__clocm, __smon));
263 _M_init_facet(new moneypunct<wchar_t, true>(__clocm, __smon));
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264 _M_init_facet(new money_get<wchar_t>);
265 _M_init_facet(new money_put<wchar_t>);
266 _M_init_facet(new __timepunct<wchar_t>(__cloc, __s));
267 _M_init_facet(new time_get<wchar_t>);
268 _M_init_facet(new time_put<wchar_t>);
269 _M_init_facet(new std::messages<wchar_t>(__cloc, __s));
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270#endif
271
612c9c70 272#if _GLIBCXX_NUM_UNICODE_FACETS != 0
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273 _M_init_facet(new codecvt<char16_t, char, mbstate_t>);
274 _M_init_facet(new codecvt<char32_t, char, mbstate_t>);
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275
276#ifdef _GLIBCXX_USE_CHAR8_T
277 _M_init_facet(new codecvt<char16_t, char8_t, mbstate_t>);
278 _M_init_facet(new codecvt<char32_t, char8_t, mbstate_t>);
279#endif
280
bb93f35d 281#endif
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282
283#if _GLIBCXX_USE_DUAL_ABI
284 _M_init_extra(&__cloc, &__clocm, __s, __smon);
285#endif
286
70863cbd 287 locale::facet::_S_destroy_c_locale(__cloc);
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288 if (__clocm != __cloc)
289 locale::facet::_S_destroy_c_locale(__clocm);
aa53f832 290 }
bc2631e0 291 __catch(...)
91675f9d 292 {
70863cbd 293 locale::facet::_S_destroy_c_locale(__cloc);
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294 if (__clocm != __cloc)
295 locale::facet::_S_destroy_c_locale(__clocm);
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296 this->~_Impl();
297 __throw_exception_again;
f92ab29f 298 }
b2dad0e3 299 }
d3a193e3 300
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301 void
302 locale::_Impl::
d358ecd0 303 _M_replace_categories(const _Impl* __imp, category __cat)
e4cc8659 304 {
4df9c41d 305 category __mask = 1;
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306 if (!_M_names[0] || !__imp->_M_names[0])
307 {
308 if (_M_names[0])
309 {
310 delete [] _M_names[0];
311 _M_names[0] = 0; // Unnamed.
312 }
313
314 for (size_t __ix = 0; __ix < _S_categories_size; ++__ix, __mask <<= 1)
315 {
316 if (__mask & __cat)
317 // Need to replace entry in _M_facets with other locale's info.
318 _M_replace_category(__imp, _S_facet_categories[__ix]);
319 }
320 }
321 else
e4cc8659 322 {
3ecaae52 323 if (!_M_names[1])
e4cc8659 324 {
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325 // A full set of _M_names must be prepared, all identical
326 // to _M_names[0] to begin with. Then, below, a few will
327 // be replaced by the corresponding __imp->_M_names. I.e.,
328 // not a "simple" locale anymore (see locale::operator==).
329 const size_t __len = std::strlen(_M_names[0]) + 1;
330 for (size_t __i = 1; __i < _S_categories_size; ++__i)
aa53f832 331 {
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332 _M_names[__i] = new char[__len];
333 std::memcpy(_M_names[__i], _M_names[0], __len);
334 }
335 }
336
337 for (size_t __ix = 0; __ix < _S_categories_size; ++__ix, __mask <<= 1)
338 {
339 if (__mask & __cat)
340 {
341 // Need to replace entry in _M_facets with other locale's info.
342 _M_replace_category(__imp, _S_facet_categories[__ix]);
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343
344 // FIXME: Hack for libstdc++/29217: the numerical encodings
345 // of the time and collate categories are swapped vs the
346 // order of the names in locale::_S_categories. We'd like to
347 // adjust the former (the latter is dictated by compatibility
348 // with glibc) but we can't for binary compatibility.
349 size_t __ix_name = __ix;
350 if (__ix == 2 || __ix == 3)
351 __ix_name = 5 - __ix;
352
353 char* __src = __imp->_M_names[__ix_name] ?
354 __imp->_M_names[__ix_name] : __imp->_M_names[0];
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355 const size_t __len = std::strlen(__src) + 1;
356 char* __new = new char[__len];
357 std::memcpy(__new, __src, __len);
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358 delete [] _M_names[__ix_name];
359 _M_names[__ix_name] = __new;
aa53f832 360 }
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361 }
362 }
363 }
3cbc7af0 364
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365_GLIBCXX_END_NAMESPACE_VERSION
366} // namespace