509 lines
13 KiB
C++
509 lines
13 KiB
C++
// Locale support -*- C++ -*-
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// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
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// Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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//
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// ISO C++ 14882: 22.1 Locales
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//
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/** @file localefwd.h
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* This is an internal header file, included by other library headers.
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* You should not attempt to use it directly.
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*/
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#ifndef _CPP_BITS_LOCCORE_H
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#define _CPP_BITS_LOCCORE_H 1
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#pragma GCC system_header
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#include <bits/c++config.h>
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#include <bits/c++locale.h> // Defines __c_locale, config-specific includes
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#include <climits> // For CHAR_BIT
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#include <cctype> // For isspace, etc.
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#include <string> // For string.
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#include <bits/functexcept.h>
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#include <bits/atomicity.h>
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namespace std
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{
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// 22.1.1 Locale
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class locale;
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// 22.1.3 Convenience interfaces
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template<typename _CharT>
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inline bool
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isspace(_CharT, const locale&);
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template<typename _CharT>
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inline bool
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isprint(_CharT, const locale&);
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template<typename _CharT>
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inline bool
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iscntrl(_CharT, const locale&);
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template<typename _CharT>
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inline bool
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isupper(_CharT, const locale&);
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template<typename _CharT>
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inline bool
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islower(_CharT, const locale&);
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template<typename _CharT>
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inline bool
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isalpha(_CharT, const locale&);
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template<typename _CharT>
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inline bool
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isdigit(_CharT, const locale&);
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template<typename _CharT>
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inline bool
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ispunct(_CharT, const locale&);
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template<typename _CharT>
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inline bool
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isxdigit(_CharT, const locale&);
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template<typename _CharT>
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inline bool
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isalnum(_CharT, const locale&);
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template<typename _CharT>
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inline bool
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isgraph(_CharT, const locale&);
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template<typename _CharT>
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inline _CharT
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toupper(_CharT, const locale&);
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template<typename _CharT>
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inline _CharT
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tolower(_CharT, const locale&);
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// 22.2.1 and 22.2.1.3 ctype
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class ctype_base;
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template<typename _CharT>
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class ctype;
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template<> class ctype<char>;
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#ifdef _GLIBCPP_USE_WCHAR_T
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template<> class ctype<wchar_t>;
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#endif
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template<typename _CharT>
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class ctype_byname;
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// NB: Specialized for char and wchar_t in locale_facets.h.
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class codecvt_base;
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class __enc_traits;
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template<typename _InternT, typename _ExternT, typename _StateT>
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class codecvt;
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template<> class codecvt<char, char, mbstate_t>;
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#ifdef _GLIBCPP_USE_WCHAR_T
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template<> class codecvt<wchar_t, char, mbstate_t>;
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#endif
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template<typename _InternT, typename _ExternT, typename _StateT>
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class codecvt_byname;
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// 22.2.2 and 22.2.3 numeric
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template<typename _CharT, typename _InIter = istreambuf_iterator<_CharT> >
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class num_get;
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template<typename _CharT, typename _OutIter = ostreambuf_iterator<_CharT> >
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class num_put;
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template<typename _CharT> class numpunct;
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template<typename _CharT> class numpunct_byname;
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// 22.2.4 collation
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template<typename _CharT>
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class collate;
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template<typename _CharT> class
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collate_byname;
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// 22.2.5 date and time
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class time_base;
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template<typename _CharT, typename _InIter = istreambuf_iterator<_CharT> >
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class time_get;
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template<typename _CharT, typename _InIter = istreambuf_iterator<_CharT> >
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class time_get_byname;
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template<typename _CharT, typename _OutIter = ostreambuf_iterator<_CharT> >
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class time_put;
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template<typename _CharT, typename _OutIter = ostreambuf_iterator<_CharT> >
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class time_put_byname;
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// 22.2.6 money
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class money_base;
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template<typename _CharT, typename _InIter = istreambuf_iterator<_CharT> >
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class money_get;
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template<typename _CharT, typename _OutIter = ostreambuf_iterator<_CharT> >
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class money_put;
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template<typename _CharT, bool _Intl = false>
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class moneypunct;
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template<typename _CharT, bool _Intl = false>
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class moneypunct_byname;
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// 22.2.7 message retrieval
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class messages_base;
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template<typename _CharT>
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class messages;
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template<typename _CharT>
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class messages_byname;
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// 22.1.1 Class locale
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class locale
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{
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public:
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// Types:
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typedef unsigned int category;
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// Forward decls and friends:
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class facet;
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class id;
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class _Impl;
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friend class facet;
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friend class _Impl;
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template<typename _Facet>
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friend const _Facet&
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use_facet(const locale&);
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template<typename _Facet>
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friend bool
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has_facet(const locale&) throw();
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// Category values:
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// NB: Order must match _S_facet_categories definition in locale.cc
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static const category none = 0;
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static const category ctype = 1L << 0;
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static const category numeric = 1L << 1;
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static const category collate = 1L << 2;
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static const category time = 1L << 3;
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static const category monetary = 1L << 4;
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static const category messages = 1L << 5;
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static const category all = (ctype | numeric | collate |
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time | monetary | messages);
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// Construct/copy/destroy:
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locale() throw();
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locale(const locale& __other) throw();
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explicit
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locale(const char* __s);
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locale(const locale& __base, const char* __s, category __cat);
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locale(const locale& __base, const locale& __add, category __cat);
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template<typename _Facet>
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locale(const locale& __other, _Facet* __f);
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~locale() throw();
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const locale&
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operator=(const locale& __other) throw();
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template<typename _Facet>
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locale
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combine(const locale& __other) const;
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// Locale operations:
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string
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name() const;
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bool
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operator==(const locale& __other) const throw ();
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inline bool
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operator!=(const locale& __other) const throw ()
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{ return !(this->operator==(__other)); }
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template<typename _Char, typename _Traits, typename _Alloc>
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bool
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operator()(const basic_string<_Char, _Traits, _Alloc>& __s1,
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const basic_string<_Char, _Traits, _Alloc>& __s2) const;
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// Global locale objects:
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static locale
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global(const locale&);
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static const locale&
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classic();
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private:
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// The (shared) implementation
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_Impl* _M_impl;
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// The "C" reference locale
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static _Impl* _S_classic;
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// Current global locale
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static _Impl* _S_global;
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// Number of standard categories. For C++, these categories are
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// collate, ctype, monetary, numeric, time, and messages. These
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// directly correspond to ISO C99 macros LC_COLLATE, LC_CTYPE,
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// LC_MONETARY, LC_NUMERIC, and LC_TIME. In addition, POSIX (IEEE
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// 1003.1-2001) specifies LC_MESSAGES.
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static const size_t _S_categories_size = 6;
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// In addition to the standard categories, the underlying
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// operating system is allowed to define extra LC_*
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// macros. For GNU systems, the following are also valid:
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// LC_PAPER, LC_NAME, LC_ADDRESS, LC_TELEPHONE, LC_MEASUREMENT,
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// and LC_IDENTIFICATION.
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static const size_t _S_extra_categories_size = _GLIBCPP_NUM_CATEGORIES;
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// Names of underlying locale categories.
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// NB: locale::global() has to know how to modify all the
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// underlying categories, not just the ones required by the C++
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// standard.
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static const char* _S_categories[_S_categories_size
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+ _S_extra_categories_size];
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explicit
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locale(_Impl*) throw();
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static inline void
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_S_initialize()
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{
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if (!_S_classic)
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classic();
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}
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static category
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_S_normalize_category(category);
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void
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_M_coalesce(const locale& __base, const locale& __add, category __cat);
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};
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// Implementation object for locale
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class locale::_Impl
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{
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public:
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// Friends.
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friend class locale;
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friend class locale::facet;
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template<typename _Facet>
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friend const _Facet&
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use_facet(const locale&);
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template<typename _Facet>
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friend bool
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has_facet(const locale&) throw();
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private:
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// Data Members.
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_Atomic_word _M_references;
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facet** _M_facets;
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size_t _M_facets_size;
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char* _M_names[_S_categories_size
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+ _S_extra_categories_size];
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static const locale::id* const _S_id_ctype[];
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static const locale::id* const _S_id_numeric[];
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static const locale::id* const _S_id_collate[];
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static const locale::id* const _S_id_time[];
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static const locale::id* const _S_id_monetary[];
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static const locale::id* const _S_id_messages[];
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static const locale::id* const* const _S_facet_categories[];
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inline void
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_M_add_reference() throw()
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{ __atomic_add(&_M_references, 1); }
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inline void
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_M_remove_reference() throw()
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{
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if (__exchange_and_add(&_M_references, -1) == 1)
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{
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try
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{ delete this; }
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catch(...)
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{ }
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}
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}
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_Impl(const _Impl&, size_t);
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_Impl(const char*, size_t);
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_Impl(facet**, size_t, bool);
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~_Impl() throw();
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_Impl(const _Impl&); // Not defined.
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void
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operator=(const _Impl&); // Not defined.
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inline bool
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_M_check_same_name()
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{
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bool __ret = true;
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for (size_t __i = 0;
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__ret && __i < _S_categories_size + _S_extra_categories_size - 1;
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++__i)
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__ret &= (strcmp(_M_names[__i], _M_names[__i + 1]) == 0);
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return __ret;
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}
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void
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_M_replace_categories(const _Impl*, category);
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void
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_M_replace_category(const _Impl*, const locale::id* const*);
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void
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_M_replace_facet(const _Impl*, const locale::id*);
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void
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_M_install_facet(const locale::id*, facet*);
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template<typename _Facet>
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inline void
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_M_init_facet(_Facet* __facet)
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{ _M_install_facet(&_Facet::id, __facet); }
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};
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template<typename _Facet>
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locale::locale(const locale& __other, _Facet* __f)
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{
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_M_impl = new _Impl(*__other._M_impl, 1);
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_M_impl->_M_install_facet(&_Facet::id, __f);
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for (size_t __i = 0;
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__i < _S_categories_size + _S_extra_categories_size; ++__i)
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{
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delete [] _M_impl->_M_names[__i];
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char* __new = new char[2];
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strcpy(__new, "*");
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_M_impl->_M_names[__i] = __new;
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}
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}
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// 22.1.1.1.2 Class locale::facet
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class locale::facet
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{
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private:
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friend class locale;
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friend class locale::_Impl;
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_Atomic_word _M_references;
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protected:
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// Contains data from the underlying "C" library for for the
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// classic locale.
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static __c_locale _S_c_locale;
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// String literal for the name of the classic locale.
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static char _S_c_name[2];
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explicit
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facet(size_t __refs = 0) throw();
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virtual
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~facet();
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static void
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_S_create_c_locale(__c_locale& __cloc, const char* __s,
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__c_locale __old = 0);
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static __c_locale
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_S_clone_c_locale(__c_locale& __cloc);
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static void
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_S_destroy_c_locale(__c_locale& __cloc);
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private:
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void
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_M_add_reference() throw();
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void
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_M_remove_reference() throw();
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facet(const facet&); // Not defined.
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void
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operator=(const facet&); // Not defined.
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};
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// 22.1.1.1.3 Class locale::id
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class locale::id
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{
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private:
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friend class locale;
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friend class locale::_Impl;
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template<typename _Facet>
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friend const _Facet&
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use_facet(const locale&);
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template<typename _Facet>
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friend bool
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has_facet(const locale&) throw ();
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// NB: There is no accessor for _M_index because it may be used
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// before the constructor is run; the effect of calling a member
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// function (even an inline) would be undefined.
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mutable size_t _M_index;
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// Last id number assigned.
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static _Atomic_word _S_highwater;
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void
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operator=(const id&); // Not defined.
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id(const id&); // Not defined.
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public:
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// NB: This class is always a static data member, and thus can be
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// counted on to be zero-initialized.
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id();
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inline size_t
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_M_id() const
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{
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if (!_M_index)
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_M_index = 1 + __exchange_and_add(&_S_highwater, 1);
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return _M_index - 1;
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}
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};
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template<typename _Facet>
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const _Facet&
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use_facet(const locale& __loc);
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template<typename _Facet>
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bool
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has_facet(const locale& __loc) throw();
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} // namespace std
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#endif
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