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gcc/libstdc++-v3/bits/localefwd.h
Benjamin Kosnik b2dad0e372 libstdc++-v3: New directory. 
2000-04-21  Benjamin Kosnik  <bkoz@redhat.com>

	* libstdc++-v3: New directory.

From-SVN: r33317
2000-04-21 20:33:34 +00:00

498 lines
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// Locale support -*- C++ -*-
// Copyright (C) 1997-2000 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
//
#ifndef _CPP_BITS_LOCCORE_H
#define _CPP_BITS_LOCCORE_H 1
#include <bits/c++config.h>
#include <bits/std_climits.h> // For CHAR_BIT
#include <bits/std_string.h> // For string
#include <bits/std_cctype.h> // For isspace, etc.
namespace std
{
// _Count_ones: compile-time computation of number of 1-bits in a value N
// This takes only 5 (or 6) instantiations, doing recursive descent
// in parallel -- ncm
template<unsigned _Num, int _Shift = (sizeof(unsigned) * CHAR_BIT)/2,
unsigned _Mask = (~0u >> _Shift) >
struct _Count_ones;
template<unsigned _Num, unsigned _Mask>
struct _Count_ones<_Num,0,_Mask>
{ static const unsigned _S_count = _Num; };
template<unsigned _Num, int _Shift, unsigned _Mask>
struct _Count_ones
{
static const unsigned _S_halfcount =
_Count_ones<_Num, _Shift/2, (_Mask^((~_Mask)>>(_Shift/2))) >::_S_count;
static const unsigned _S_count
= (_S_halfcount&_Mask) + ((_S_halfcount>>_Shift)&_Mask);
};
// 22.1.1 Locale
template<typename _Tp> class allocator;
template<typename _Tp, typename _Alloc> class vector;
class locale;
template<typename _Facet>
const _Facet&
use_facet(const locale&);
template<typename _Facet>
bool
has_facet(const locale&) throw();
// 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 locfacets.h.
class codecvt_base;
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;
template<> class codecvt_byname<char, char, mbstate_t>;
#ifdef _GLIBCPP_USE_WCHAR_T
template<> class codecvt_byname<wchar_t, char, mbstate_t>;
#endif
// 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<> class collate<char>;
#ifdef _GLIBCPP_USE_WCHAR_T
template<> class collate<wchar_t>;
#endif
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
{
// Forwrd decls and friends:
class _Impl;
friend _Impl;
template<typename _Facet>
friend const _Facet&
use_facet(const locale&);
template<typename _Facet>
friend bool
has_facet(const locale&) throw();
public:
// Types:
class facet;
class id;
typedef int category;
// Category values:
// NB much depends on the order in which these appear:
static const category none = 0;
static const category collate = 0x0100;
static const category ctype = 0x0200;
static const category monetary = 0x0400;
static const category numeric = 0x0800;
static const category time = 0x1000;
static const category messages = 0x2000;
static const category all = (collate | ctype | monetary |
numeric | time | messages);
// Construct/copy/destroy:
inline
locale() throw();
inline
locale(const locale& __other) throw();
explicit
locale(const char* __std_name);
locale(const locale& __other, const char* __std_name, category __cats);
locale(const locale& __other, const locale& __one, category __cats);
template<typename _Facet>
locale(const locale& __other, _Facet* __f);
inline
~locale() throw();
const locale&
operator=(const locale& __other) throw();
template<typename _Facet>
locale
combine(const locale& __other);
// Locale operations:
string
name() const;
bool
operator==(const locale& __other) const throw ();
inline bool
operator!=(const locale& __other) const throw ()
{ return !(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:
_Impl* _M_impl; // The (shared) implementation
static _Impl* _S_classic; // The one true C reference locale
static _Impl* _S_global; // Current global reference locale
explicit
locale(_Impl*) throw();
static inline void
_S_initialize()
{ if (!_S_classic) classic(); }
static int
_S_normalize_category(int);
static const int
_S_num_categories = _Count_ones<all>::_S_count;
};
// locale implementation object
class locale::_Impl
{
typedef vector<facet*, allocator<facet*> > __vec_facet;
typedef vector<string, allocator<string> > __vec_string;
// Friends:
friend class locale;
friend class facet;
template<typename _Facet>
friend const _Facet&
use_facet(const locale&);
template<typename _Facet>
friend bool
has_facet(const locale&) throw();
size_t _M_num_references;
__vec_facet* _M_facets;
__vec_string* _M_category_names;
bool _M_has_name;
bool _M_cached_name_ok;
string _M_cached_name;
inline void
_M_add_reference() throw()
{ ++_M_num_references; } // XXX MT
inline void
_M_remove_reference() throw()
{
if (_M_num_references-- == 0) // XXX MT
{
try {
delete this;
}
catch(...) {
}
}
}
_Impl(const _Impl&, size_t __refs);
_Impl(const _Impl&, const string&, category, size_t __refs);
_Impl(size_t __facets, size_t __refs);
~_Impl() throw();
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); }
void
_M_construct_collate(const char*);
void
_M_construct_ctype(const char*);
void
_M_construct_monetary(const char*);
void
_M_construct_numeric(const char*);
void
_M_construct_time(const char*);
void
_M_construct_messages(const char*);
category
_M_normalize_category_names(const string&, category __cats);
static const locale::id* const _S_id_collate[];
static const locale::id* const _S_id_ctype[];
static const locale::id* const _S_id_monetary[];
static const locale::id* const _S_id_numeric[];
static const locale::id* const _S_id_time[];
static const locale::id* const _S_id_messages[];
static const locale::id* const* const _S_facet_categories[];
};
// class locale inlines, that need declaration of locale::_Imp
locale::locale() throw()
{
_S_initialize();
(_M_impl = _S_global)->_M_add_reference();
} // XXX MT
locale::locale(const locale& __other) throw()
{ (_M_impl = __other._M_impl)->_M_add_reference(); }
template<typename _Facet>
locale::locale(const locale& __other, _Facet* __f)
{
_M_impl = new _Impl(*__other._M_impl, 0);
_M_impl->_M_install_facet(&_Facet::id, __f);
_M_impl->_M_has_name = false;
}
locale::~locale() throw()
{ _M_impl->_M_remove_reference(); }
// 22.1.1.1.2 Class locale::facet
class locale::facet
{
friend class locale;
friend class locale::_Impl;
protected:
explicit
facet(size_t __refs = 0) throw();
virtual
~facet() {};
private:
size_t _M_num_references;
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
{
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 ();
public:
id() {};
private:
// 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;
static size_t _S_highwater; // last id number assigned
void
operator=(const id&); // not defined
id(const id&); // not defined
};
template<typename _Facet>
const _Facet&
use_facet(const locale& __loc);
template<typename _Facet>
bool
has_facet(const locale& __loc) throw();
} // namespace std
#endif /* _CPP_BITS_LOCCORE_H */
// Local Variables:
// mode:c++
// End:
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