1 // Locale support -*- C++ -*-
3 // Copyright (C) 2007, 2008, 2009 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 _GLIBCXX_BEGIN_NAMESPACE(std)
41 template<typename _Facet>
43 locale(const locale& __other, _Facet* __f)
45 _M_impl = new _Impl(*__other._M_impl, 1);
48 { _M_impl->_M_install_facet(&_Facet::id, __f); }
51 _M_impl->_M_remove_reference();
52 __throw_exception_again;
54 delete [] _M_impl->_M_names[0];
55 _M_impl->_M_names[0] = 0; // Unnamed.
58 template<typename _Facet>
61 combine(const locale& __other) const
63 _Impl* __tmp = new _Impl(*_M_impl, 1);
66 __tmp->_M_replace_facet(__other._M_impl, &_Facet::id);
70 __tmp->_M_remove_reference();
71 __throw_exception_again;
76 template<typename _CharT, typename _Traits, typename _Alloc>
79 operator()(const basic_string<_CharT, _Traits, _Alloc>& __s1,
80 const basic_string<_CharT, _Traits, _Alloc>& __s2) const
82 typedef std::collate<_CharT> __collate_type;
83 const __collate_type& __collate = use_facet<__collate_type>(*this);
84 return (__collate.compare(__s1.data(), __s1.data() + __s1.length(),
85 __s2.data(), __s2.data() + __s2.length()) < 0);
89 template<typename _Facet>
91 has_facet(const locale& __loc) throw()
93 const size_t __i = _Facet::id._M_id();
94 const locale::facet** __facets = __loc._M_impl->_M_facets;
95 return (__i < __loc._M_impl->_M_facets_size
97 && dynamic_cast<const _Facet*>(__facets[__i]));
99 && static_cast<const _Facet*>(__facets[__i]));
103 template<typename _Facet>
105 use_facet(const locale& __loc)
107 const size_t __i = _Facet::id._M_id();
108 const locale::facet** __facets = __loc._M_impl->_M_facets;
109 if (__i >= __loc._M_impl->_M_facets_size || !__facets[__i])
112 return dynamic_cast<const _Facet&>(*__facets[__i]);
114 return static_cast<const _Facet&>(*__facets[__i]);
119 // Generic version does nothing.
120 template<typename _CharT>
122 collate<_CharT>::_M_compare(const _CharT*, const _CharT*) const throw ()
125 // Generic version does nothing.
126 template<typename _CharT>
128 collate<_CharT>::_M_transform(_CharT*, const _CharT*, size_t) const throw ()
131 template<typename _CharT>
134 do_compare(const _CharT* __lo1, const _CharT* __hi1,
135 const _CharT* __lo2, const _CharT* __hi2) const
137 // strcoll assumes zero-terminated strings so we make a copy
138 // and then put a zero at the end.
139 const string_type __one(__lo1, __hi1);
140 const string_type __two(__lo2, __hi2);
142 const _CharT* __p = __one.c_str();
143 const _CharT* __pend = __one.data() + __one.length();
144 const _CharT* __q = __two.c_str();
145 const _CharT* __qend = __two.data() + __two.length();
147 // strcoll stops when it sees a nul character so we break
148 // the strings into zero-terminated substrings and pass those
152 const int __res = _M_compare(__p, __q);
156 __p += char_traits<_CharT>::length(__p);
157 __q += char_traits<_CharT>::length(__q);
158 if (__p == __pend && __q == __qend)
160 else if (__p == __pend)
162 else if (__q == __qend)
170 template<typename _CharT>
171 typename collate<_CharT>::string_type
173 do_transform(const _CharT* __lo, const _CharT* __hi) const
177 // strxfrm assumes zero-terminated strings so we make a copy
178 const string_type __str(__lo, __hi);
180 const _CharT* __p = __str.c_str();
181 const _CharT* __pend = __str.data() + __str.length();
183 size_t __len = (__hi - __lo) * 2;
185 _CharT* __c = new _CharT[__len];
189 // strxfrm stops when it sees a nul character so we break
190 // the string into zero-terminated substrings and pass those
194 // First try a buffer perhaps big enough.
195 size_t __res = _M_transform(__c, __p, __len);
196 // If the buffer was not large enough, try again with the
201 delete [] __c, __c = 0;
202 __c = new _CharT[__len];
203 __res = _M_transform(__c, __p, __len);
206 __ret.append(__c, __res);
207 __p += char_traits<_CharT>::length(__p);
212 __ret.push_back(_CharT());
218 __throw_exception_again;
226 template<typename _CharT>
229 do_hash(const _CharT* __lo, const _CharT* __hi) const
231 unsigned long __val = 0;
232 for (; __lo < __hi; ++__lo)
234 *__lo + ((__val << 7)
235 | (__val >> (__gnu_cxx::__numeric_traits<unsigned long>::
237 return static_cast<long>(__val);
240 // Inhibit implicit instantiations for required instantiations,
241 // which are defined via explicit instantiations elsewhere.
242 // NB: This syntax is a GNU extension.
243 #if _GLIBCXX_EXTERN_TEMPLATE
244 extern template class collate<char>;
245 extern template class collate_byname<char>;
249 use_facet<collate<char> >(const locale&);
253 has_facet<collate<char> >(const locale&);
255 #ifdef _GLIBCXX_USE_WCHAR_T
256 extern template class collate<wchar_t>;
257 extern template class collate_byname<wchar_t>;
260 const collate<wchar_t>&
261 use_facet<collate<wchar_t> >(const locale&);
265 has_facet<collate<wchar_t> >(const locale&);
269 _GLIBCXX_END_NAMESPACE