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gcc/libstdc++-v3/include/bits/localefwd.h

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// Locale support -*- C++ -*-
// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
// 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_LOCCORE_H
#define _CPP_BITS_LOCCORE_H 1
#pragma GCC system_header
#include <bits/c++config.h>
#include <bits/c++locale.h> // Defines __c_locale, config-specific includes
#include <climits> // For CHAR_BIT
#include <cctype> // For isspace, etc.
#include <string> // For string.
#include <bits/functexcept.h>
#include <bits/atomicity.h>
namespace std
{
// 22.1.1 Locale
class locale;
// 22.1.3 Convenience interfaces
template<typename _CharT>
inline bool
isspace(_CharT, const locale&);
template<typename _CharT>
inline bool
isprint(_CharT, const locale&);
template<typename _CharT>
inline bool
iscntrl(_CharT, const locale&);
template<typename _CharT>
inline bool
isupper(_CharT, const locale&);
template<typename _CharT>
inline bool
islower(_CharT, const locale&);
template<typename _CharT>
inline bool
isalpha(_CharT, const locale&);
template<typename _CharT>
inline bool
isdigit(_CharT, const locale&);
template<typename _CharT>
inline bool
ispunct(_CharT, const locale&);
template<typename _CharT>
inline bool
isxdigit(_CharT, const locale&);
template<typename _CharT>
inline bool
isalnum(_CharT, const locale&);
template<typename _CharT>
inline bool
isgraph(_CharT, const locale&);
template<typename _CharT>
inline _CharT
toupper(_CharT, const locale&);
template<typename _CharT>
inline _CharT
tolower(_CharT, const locale&);
// 22.2.1 and 22.2.1.3 ctype
class ctype_base;
template<typename _CharT>
class ctype;
template<> class ctype<char>;
#ifdef _GLIBCPP_USE_WCHAR_T
template<> class ctype<wchar_t>;
#endif
template<typename _CharT>
class ctype_byname;
// NB: Specialized for char and wchar_t in locale_facets.h.
class codecvt_base;
class __enc_traits;
template<typename _InternT, typename _ExternT, typename _StateT>
class codecvt;
template<> class codecvt<char, char, mbstate_t>;
#ifdef _GLIBCPP_USE_WCHAR_T
template<> class codecvt<wchar_t, char, mbstate_t>;
#endif
template<typename _InternT, typename _ExternT, typename _StateT>
class codecvt_byname;
// 22.2.2 and 22.2.3 numeric
template<typename _CharT, typename _InIter = istreambuf_iterator<_CharT> >
class num_get;
template<typename _CharT, typename _OutIter = ostreambuf_iterator<_CharT> >
class num_put;
template<typename _CharT> class numpunct;
template<typename _CharT> class numpunct_byname;
// 22.2.4 collation
template<typename _CharT>
class collate;
template<typename _CharT> class
collate_byname;
// 22.2.5 date and time
class time_base;
template<typename _CharT, typename _InIter = istreambuf_iterator<_CharT> >
class time_get;
template<typename _CharT, typename _InIter = istreambuf_iterator<_CharT> >
class time_get_byname;
template<typename _CharT, typename _OutIter = ostreambuf_iterator<_CharT> >
class time_put;
template<typename _CharT, typename _OutIter = ostreambuf_iterator<_CharT> >
class time_put_byname;
// 22.2.6 money
class money_base;
template<typename _CharT, typename _InIter = istreambuf_iterator<_CharT> >
class money_get;
template<typename _CharT, typename _OutIter = ostreambuf_iterator<_CharT> >
class money_put;
template<typename _CharT, bool _Intl = false>
class moneypunct;
template<typename _CharT, bool _Intl = false>
class moneypunct_byname;
// 22.2.7 message retrieval
class messages_base;
template<typename _CharT>
class messages;
template<typename _CharT>
class messages_byname;
// 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 reference 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 default "C"
// or "POSIX" locale.
static __c_locale _S_c_locale;
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;
}
};
template<typename _Facet>
const _Facet&
use_facet(const locale& __loc);
template<typename _Facet>
bool
has_facet(const locale& __loc) throw();
} // namespace std
#endif
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