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+// Locale support -*- C++ -*-
+
+// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
+// Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 2, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING. If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction. Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License. This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+//
+// ISO C++ 14882: 22.1 Locales
+//
+
+/** @file localefwd.h
+ * This is an internal header file, included by other library headers.
+ * You should not attempt to use it directly.
+ */
+
+#ifndef _CPP_BITS_LOCALE_CLASSES_H
+#define _CPP_BITS_LOCALE_CLASSES_H 1
+
+#pragma GCC system_header
+
+#include <bits/localefwd.h>
+#include <cstring> // For strcmp.
+#include <string>
+#include <bits/atomicity.h>
+
+namespace std
+{
+ // 22.1.1 Class locale
+ class locale
+ {
+ public:
+ // Types:
+ typedef unsigned int category;
+
+ // Forward decls and friends:
+ class facet;
+ class id;
+ class _Impl;
+
+ friend class facet;
+ friend class _Impl;
+
+ template<typename _Facet>
+ friend const _Facet&
+ use_facet(const locale&);
+
+ template<typename _Facet>
+ friend bool
+ has_facet(const locale&) throw();
+
+ // Category values:
+ // NB: Order must match _S_facet_categories definition in locale.cc
+ static const category none = 0;
+ static const category ctype = 1L << 0;
+ static const category numeric = 1L << 1;
+ static const category collate = 1L << 2;
+ static const category time = 1L << 3;
+ static const category monetary = 1L << 4;
+ static const category messages = 1L << 5;
+ static const category all = (ctype | numeric | collate |
+ time | monetary | messages);
+
+ // Construct/copy/destroy:
+ locale() throw();
+
+ locale(const locale& __other) throw();
+
+ explicit
+ locale(const char* __s);
+
+ locale(const locale& __base, const char* __s, category __cat);
+
+ locale(const locale& __base, const locale& __add, category __cat);
+
+ template<typename _Facet>
+ locale(const locale& __other, _Facet* __f);
+
+ ~locale() throw();
+
+ const locale&
+ operator=(const locale& __other) throw();
+
+ template<typename _Facet>
+ locale
+ combine(const locale& __other) const;
+
+ // Locale operations:
+ string
+ name() const;
+
+ bool
+ operator==(const locale& __other) const throw ();
+
+ inline bool
+ operator!=(const locale& __other) const throw ()
+ { return !(this->operator==(__other)); }
+
+ template<typename _Char, typename _Traits, typename _Alloc>
+ bool
+ operator()(const basic_string<_Char, _Traits, _Alloc>& __s1,
+ const basic_string<_Char, _Traits, _Alloc>& __s2) const;
+
+ // Global locale objects:
+ static locale
+ global(const locale&);
+
+ static const locale&
+ classic();
+
+ private:
+ // The (shared) implementation
+ _Impl* _M_impl;
+
+ // The "C" reference locale
+ static _Impl* _S_classic;
+
+ // Current global locale
+ static _Impl* _S_global;
+
+ // Number of standard categories. For C++, these categories are
+ // collate, ctype, monetary, numeric, time, and messages. These
+ // directly correspond to ISO C99 macros LC_COLLATE, LC_CTYPE,
+ // LC_MONETARY, LC_NUMERIC, and LC_TIME. In addition, POSIX (IEEE
+ // 1003.1-2001) specifies LC_MESSAGES.
+ static const size_t _S_categories_size = 6;
+
+ // In addition to the standard categories, the underlying
+ // operating system is allowed to define extra LC_*
+ // macros. For GNU systems, the following are also valid:
+ // LC_PAPER, LC_NAME, LC_ADDRESS, LC_TELEPHONE, LC_MEASUREMENT,
+ // and LC_IDENTIFICATION.
+ static const size_t _S_extra_categories_size = _GLIBCPP_NUM_CATEGORIES;
+
+ // Names of underlying locale categories.
+ // NB: locale::global() has to know how to modify all the
+ // underlying categories, not just the ones required by the C++
+ // standard.
+ static const char* _S_categories[_S_categories_size
+ + _S_extra_categories_size];
+
+ explicit
+ locale(_Impl*) throw();
+
+ static inline void
+ _S_initialize()
+ {
+ if (!_S_classic)
+ classic();
+ }
+
+ static category
+ _S_normalize_category(category);
+
+ void
+ _M_coalesce(const locale& __base, const locale& __add, category __cat);
+ };
+
+
+ // Implementation object for locale
+ class locale::_Impl
+ {
+ public:
+ // Friends.
+ friend class locale;
+ friend class locale::facet;
+
+ template<typename _Facet>
+ friend const _Facet&
+ use_facet(const locale&);
+
+ template<typename _Facet>
+ friend bool
+ has_facet(const locale&) throw();
+
+ private:
+ // Data Members.
+ _Atomic_word _M_references;
+ facet** _M_facets;
+ size_t _M_facets_size;
+
+ char* _M_names[_S_categories_size
+ + _S_extra_categories_size];
+ static const locale::id* const _S_id_ctype[];
+ static const locale::id* const _S_id_numeric[];
+ static const locale::id* const _S_id_collate[];
+ static const locale::id* const _S_id_time[];
+ static const locale::id* const _S_id_monetary[];
+ static const locale::id* const _S_id_messages[];
+ static const locale::id* const* const _S_facet_categories[];
+
+ inline void
+ _M_add_reference() throw()
+ { __atomic_add(&_M_references, 1); }
+
+ inline void
+ _M_remove_reference() throw()
+ {
+ if (__exchange_and_add(&_M_references, -1) == 1)
+ {
+ try
+ { delete this; }
+ catch(...)
+ { }
+ }
+ }
+
+ _Impl(const _Impl&, size_t);
+ _Impl(const char*, size_t);
+ _Impl(facet**, size_t, bool);
+
+ ~_Impl() throw();
+
+ _Impl(const _Impl&); // Not defined.
+
+ void
+ operator=(const _Impl&); // Not defined.
+
+ inline bool
+ _M_check_same_name()
+ {
+ bool __ret = true;
+ for (size_t __i = 0;
+ __ret && __i < _S_categories_size + _S_extra_categories_size - 1;
+ ++__i)
+ __ret &= (strcmp(_M_names[__i], _M_names[__i + 1]) == 0);
+ return __ret;
+ }
+
+ void
+ _M_replace_categories(const _Impl*, category);
+
+ void
+ _M_replace_category(const _Impl*, const locale::id* const*);
+
+ void
+ _M_replace_facet(const _Impl*, const locale::id*);
+
+ void
+ _M_install_facet(const locale::id*, facet*);
+
+ template<typename _Facet>
+ inline void
+ _M_init_facet(_Facet* __facet)
+ { _M_install_facet(&_Facet::id, __facet); }
+ };
+
+ template<typename _Facet>
+ locale::locale(const locale& __other, _Facet* __f)
+ {
+ _M_impl = new _Impl(*__other._M_impl, 1);
+ _M_impl->_M_install_facet(&_Facet::id, __f);
+ for (size_t __i = 0;
+ __i < _S_categories_size + _S_extra_categories_size; ++__i)
+ {
+ delete [] _M_impl->_M_names[__i];
+ char* __new = new char[2];
+ strcpy(__new, "*");
+ _M_impl->_M_names[__i] = __new;
+ }
+ }
+
+
+ // 22.1.1.1.2 Class locale::facet
+ class locale::facet
+ {
+ private:
+ friend class locale;
+ friend class locale::_Impl;
+
+ _Atomic_word _M_references;
+
+ protected:
+ // Contains data from the underlying "C" library for the classic locale.
+ static __c_locale _S_c_locale;
+
+ // String literal for the name of the classic locale.
+ static char _S_c_name[2];
+
+ explicit
+ facet(size_t __refs = 0) throw();
+
+ virtual
+ ~facet();
+
+ static void
+ _S_create_c_locale(__c_locale& __cloc, const char* __s,
+ __c_locale __old = 0);
+
+ static __c_locale
+ _S_clone_c_locale(__c_locale& __cloc);
+
+ static void
+ _S_destroy_c_locale(__c_locale& __cloc);
+
+ private:
+ void
+ _M_add_reference() throw();
+
+ void
+ _M_remove_reference() throw();
+
+ facet(const facet&); // Not defined.
+
+ void
+ operator=(const facet&); // Not defined.
+ };
+
+
+ // 22.1.1.1.3 Class locale::id
+ class locale::id
+ {
+ private:
+ friend class locale;
+ friend class locale::_Impl;
+ template<typename _Facet>
+ friend const _Facet&
+ use_facet(const locale&);
+ template<typename _Facet>
+ friend bool
+ has_facet(const locale&) throw ();
+
+ // NB: There is no accessor for _M_index because it may be used
+ // before the constructor is run; the effect of calling a member
+ // function (even an inline) would be undefined.
+ mutable size_t _M_index;
+
+ // Last id number assigned.
+ static _Atomic_word _S_highwater;
+
+ void
+ operator=(const id&); // Not defined.
+
+ id(const id&); // Not defined.
+
+ public:
+ // NB: This class is always a static data member, and thus can be
+ // counted on to be zero-initialized.
+ id();
+
+ inline size_t
+ _M_id() const
+ {
+ if (!_M_index)
+ _M_index = 1 + __exchange_and_add(&_S_highwater, 1);
+ return _M_index - 1;
+ }
+ };
+} // namespace std
+
+#endif
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