1 // Locale support -*- C++ -*-
3 // Copyright (C) 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
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)
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.
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.
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/>.
25 /** @file bits/locale_classes.tcc
26 * This is an internal header file, included by other library headers.
27 * Do not attempt to use it directly. @headername{locale}
31 // ISO C++ 14882: 22.1 Locales
34 #ifndef _LOCALE_CLASSES_TCC
35 #define _LOCALE_CLASSES_TCC 1
37 #pragma GCC system_header
39 namespace std _GLIBCXX_VISIBILITY(default)
41 _GLIBCXX_BEGIN_NAMESPACE_VERSION
43 template<typename _Facet>
45 locale(const locale& __other, _Facet* __f)
47 _M_impl = new _Impl(*__other._M_impl, 1);
50 { _M_impl->_M_install_facet(&_Facet::id, __f); }
53 _M_impl->_M_remove_reference();
54 __throw_exception_again;
56 delete [] _M_impl->_M_names[0];
57 _M_impl->_M_names[0] = 0; // Unnamed.
60 template<typename _Facet>
63 combine(const locale& __other) const
65 _Impl* __tmp = new _Impl(*_M_impl, 1);
68 __tmp->_M_replace_facet(__other._M_impl, &_Facet::id);
72 __tmp->_M_remove_reference();
73 __throw_exception_again;
78 template<typename _CharT, typename _Traits, typename _Alloc>
81 operator()(const basic_string<_CharT, _Traits, _Alloc>& __s1,
82 const basic_string<_CharT, _Traits, _Alloc>& __s2) const
84 typedef std::collate<_CharT> __collate_type;
85 const __collate_type& __collate = use_facet<__collate_type>(*this);
86 return (__collate.compare(__s1.data(), __s1.data() + __s1.length(),
87 __s2.data(), __s2.data() + __s2.length()) < 0);
91 template<typename _Facet>
93 has_facet(const locale& __loc) throw()
95 const size_t __i = _Facet::id._M_id();
96 const locale::facet** __facets = __loc._M_impl->_M_facets;
97 return (__i < __loc._M_impl->_M_facets_size
99 && dynamic_cast<const _Facet*>(__facets[__i]));
101 && static_cast<const _Facet*>(__facets[__i]));
105 template<typename _Facet>
107 use_facet(const locale& __loc)
109 const size_t __i = _Facet::id._M_id();
110 const locale::facet** __facets = __loc._M_impl->_M_facets;
111 if (__i >= __loc._M_impl->_M_facets_size || !__facets[__i])
114 return dynamic_cast<const _Facet&>(*__facets[__i]);
116 return static_cast<const _Facet&>(*__facets[__i]);
121 // Generic version does nothing.
122 template<typename _CharT>
124 collate<_CharT>::_M_compare(const _CharT*, const _CharT*) const throw ()
127 // Generic version does nothing.
128 template<typename _CharT>
130 collate<_CharT>::_M_transform(_CharT*, const _CharT*, size_t) const throw ()
133 template<typename _CharT>
136 do_compare(const _CharT* __lo1, const _CharT* __hi1,
137 const _CharT* __lo2, const _CharT* __hi2) const
139 // strcoll assumes zero-terminated strings so we make a copy
140 // and then put a zero at the end.
141 const string_type __one(__lo1, __hi1);
142 const string_type __two(__lo2, __hi2);
144 const _CharT* __p = __one.c_str();
145 const _CharT* __pend = __one.data() + __one.length();
146 const _CharT* __q = __two.c_str();
147 const _CharT* __qend = __two.data() + __two.length();
149 // strcoll stops when it sees a nul character so we break
150 // the strings into zero-terminated substrings and pass those
154 const int __res = _M_compare(__p, __q);
158 __p += char_traits<_CharT>::length(__p);
159 __q += char_traits<_CharT>::length(__q);
160 if (__p == __pend && __q == __qend)
162 else if (__p == __pend)
164 else if (__q == __qend)
172 template<typename _CharT>
173 typename collate<_CharT>::string_type
175 do_transform(const _CharT* __lo, const _CharT* __hi) const
179 // strxfrm assumes zero-terminated strings so we make a copy
180 const string_type __str(__lo, __hi);
182 const _CharT* __p = __str.c_str();
183 const _CharT* __pend = __str.data() + __str.length();
185 size_t __len = (__hi - __lo) * 2;
187 _CharT* __c = new _CharT[__len];
191 // strxfrm stops when it sees a nul character so we break
192 // the string into zero-terminated substrings and pass those
196 // First try a buffer perhaps big enough.
197 size_t __res = _M_transform(__c, __p, __len);
198 // If the buffer was not large enough, try again with the
203 delete [] __c, __c = 0;
204 __c = new _CharT[__len];
205 __res = _M_transform(__c, __p, __len);
208 __ret.append(__c, __res);
209 __p += char_traits<_CharT>::length(__p);
214 __ret.push_back(_CharT());
220 __throw_exception_again;
228 template<typename _CharT>
231 do_hash(const _CharT* __lo, const _CharT* __hi) const
233 unsigned long __val = 0;
234 for (; __lo < __hi; ++__lo)
236 *__lo + ((__val << 7)
237 | (__val >> (__gnu_cxx::__numeric_traits<unsigned long>::
239 return static_cast<long>(__val);
242 // Inhibit implicit instantiations for required instantiations,
243 // which are defined via explicit instantiations elsewhere.
244 #if _GLIBCXX_EXTERN_TEMPLATE
245 extern template class collate<char>;
246 extern template class collate_byname<char>;
250 use_facet<collate<char> >(const locale&);
254 has_facet<collate<char> >(const locale&);
256 #ifdef _GLIBCXX_USE_WCHAR_T
257 extern template class collate<wchar_t>;
258 extern template class collate_byname<wchar_t>;
261 const collate<wchar_t>&
262 use_facet<collate<wchar_t> >(const locale&);
266 has_facet<collate<wchar_t> >(const locale&);
270 _GLIBCXX_END_NAMESPACE_VERSION