211 lines
5.5 KiB
C++
211 lines
5.5 KiB
C++
// Iostreams base classes -*- C++ -*-
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// Copyright (C) 1997, 1998, 1999, 2001, 2002 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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/** @file basic_ios.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_BASICIOS_H
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#define _CPP_BITS_BASICIOS_H 1
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#pragma GCC system_header
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#include <bits/streambuf_iterator.h>
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#include <bits/locale_facets.h>
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namespace std
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{
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// 27.4.5 Template class basic_ios
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template<typename _CharT, typename _Traits>
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class basic_ios : public ios_base
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{
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public:
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// Types:
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typedef _CharT char_type;
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typedef typename _Traits::int_type int_type;
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typedef typename _Traits::pos_type pos_type;
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typedef typename _Traits::off_type off_type;
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typedef _Traits traits_type;
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// Non-standard Types:
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typedef ctype<_CharT> __ctype_type;
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typedef ostreambuf_iterator<_CharT, _Traits> __ostreambuf_iter;
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typedef num_put<_CharT, __ostreambuf_iter> __numput_type;
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typedef istreambuf_iterator<_CharT, _Traits> __istreambuf_iter;
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typedef num_get<_CharT, __istreambuf_iter> __numget_type;
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// Data members:
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protected:
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basic_ostream<_CharT, _Traits>* _M_tie;
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mutable char_type _M_fill;
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mutable bool _M_fill_init;
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basic_streambuf<_CharT, _Traits>* _M_streambuf;
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// Cached use_facet<ctype>, which is based on the current locale info.
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const __ctype_type* _M_fctype;
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// From ostream.
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const __numput_type* _M_fnumput;
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// From istream.
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const __numget_type* _M_fnumget;
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public:
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operator void*() const
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{ return this->fail() ? 0 : const_cast<basic_ios*>(this); }
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bool
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operator!() const
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{ return this->fail(); }
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iostate
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rdstate() const
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{ return _M_streambuf_state; }
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void
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clear(iostate __state = goodbit);
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void
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setstate(iostate __state)
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{ this->clear(this->rdstate() | __state); }
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bool
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good() const
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{ return this->rdstate() == 0; }
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bool
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eof() const
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{ return (this->rdstate() & eofbit) != 0; }
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bool
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fail() const
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{ return (this->rdstate() & (badbit | failbit)) != 0; }
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bool
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bad() const
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{ return (this->rdstate() & badbit) != 0; }
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iostate
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exceptions() const
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{ return _M_exception; }
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void
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exceptions(iostate __except)
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{
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_M_exception = __except;
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this->clear(_M_streambuf_state);
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}
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// Constructor/destructor:
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explicit
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basic_ios(basic_streambuf<_CharT, _Traits>* __sb) : ios_base()
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{ this->init(__sb); }
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virtual
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~basic_ios() { }
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// Members:
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basic_ostream<_CharT, _Traits>*
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tie() const
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{ return _M_tie; }
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basic_ostream<_CharT, _Traits>*
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tie(basic_ostream<_CharT, _Traits>* __tiestr)
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{
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basic_ostream<_CharT, _Traits>* __old = _M_tie;
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_M_tie = __tiestr;
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return __old;
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}
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basic_streambuf<_CharT, _Traits>*
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rdbuf() const
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{ return _M_streambuf; }
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basic_streambuf<_CharT, _Traits>*
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rdbuf(basic_streambuf<_CharT, _Traits>* __sb);
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basic_ios&
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copyfmt(const basic_ios& __rhs);
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char_type
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fill() const
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{
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if (!_M_fill_init)
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{
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_M_fill = this->widen(' ');
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_M_fill_init = true;
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}
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return _M_fill;
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}
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char_type
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fill(char_type __ch)
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{
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char_type __old = this->fill();
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_M_fill = __ch;
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return __old;
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}
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// Locales:
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locale
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imbue(const locale& __loc);
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char
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narrow(char_type __c, char __dfault) const;
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char_type
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widen(char __c) const;
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protected:
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// 27.4.5.1 basic_ios constructors
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basic_ios() : ios_base()
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{ }
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void
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init(basic_streambuf<_CharT, _Traits>* __sb);
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bool
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_M_check_facet(const locale::facet* __f) const
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{
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if (!__f)
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__throw_bad_cast();
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return true;
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}
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void
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_M_cache_facets(const locale& __loc);
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};
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} // namespace std
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#ifdef _GLIBCPP_NO_TEMPLATE_EXPORT
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# define export
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#include <bits/basic_ios.tcc>
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#endif
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#endif /* _CPP_BITS_BASICIOS_H */
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