197 lines
6.4 KiB
C++
197 lines
6.4 KiB
C++
// basic_ios locale and locale-related member functions -*- C++ -*-
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// Copyright (C) 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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#ifndef _CPP_BITS_BASICIOS_TCC
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#define _CPP_BITS_BASICIOS_TCC 1
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#pragma GCC system_header
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namespace std
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{
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template<typename _CharT, typename _Traits>
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void
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basic_ios<_CharT, _Traits>::clear(iostate __state)
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{
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if (this->rdbuf())
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_M_streambuf_state = __state;
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else
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_M_streambuf_state = __state | badbit;
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if ((this->rdstate() & this->exceptions()))
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__throw_ios_failure("basic_ios::clear(iostate) caused exception");
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}
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template<typename _CharT, typename _Traits>
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basic_streambuf<_CharT, _Traits>*
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basic_ios<_CharT, _Traits>::rdbuf(basic_streambuf<_CharT, _Traits>* __sb)
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{
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basic_streambuf<_CharT, _Traits>* __old = _M_streambuf;
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_M_streambuf = __sb;
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this->clear();
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return __old;
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}
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template<typename _CharT, typename _Traits>
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basic_ios<_CharT, _Traits>&
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basic_ios<_CharT, _Traits>::copyfmt(const basic_ios& __rhs)
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{
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// Per 27.1.1.1, do not call imbue, yet must trash all caches
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// associated with imbue()
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// Alloc any new word array first, so if it fails we have "rollback".
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_Words* __words = (__rhs._M_word_size <= _S_local_word_size) ?
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_M_local_word : new _Words[__rhs._M_word_size];
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// Bump refs before doing callbacks, for safety.
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_Callback_list* __cb = __rhs._M_callbacks;
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if (__cb)
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__cb->_M_add_reference();
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_M_call_callbacks(erase_event);
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if (_M_word != _M_local_word)
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{
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delete [] _M_word;
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_M_word = 0;
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}
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_M_dispose_callbacks();
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_M_callbacks = __cb; // NB: Don't want any added during above.
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for (int __i = 0; __i < __rhs._M_word_size; ++__i)
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__words[__i] = __rhs._M_word[__i];
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if (_M_word != _M_local_word)
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{
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delete [] _M_word;
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_M_word = 0;
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}
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_M_word = __words;
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_M_word_size = __rhs._M_word_size;
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this->flags(__rhs.flags());
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this->width(__rhs.width());
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this->precision(__rhs.precision());
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this->tie(__rhs.tie());
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this->fill(__rhs.fill());
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// The next is required to be the last assignment.
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this->exceptions(__rhs.exceptions());
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_M_call_callbacks(copyfmt_event);
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return *this;
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}
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template<typename _CharT, typename _Traits>
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char
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basic_ios<_CharT, _Traits>::narrow(char_type __c, char __dfault) const
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{
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char __ret = __dfault;
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if (_M_check_facet(_M_fctype))
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__ret = _M_fctype->narrow(__c, __dfault);
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return __ret;
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}
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template<typename _CharT, typename _Traits>
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_CharT
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basic_ios<_CharT, _Traits>::widen(char __c) const
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{
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char_type __ret = char_type();
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if (_M_check_facet(_M_fctype))
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__ret = _M_fctype->widen(__c);
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return __ret;
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}
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// Locales:
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template<typename _CharT, typename _Traits>
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locale
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basic_ios<_CharT, _Traits>::imbue(const locale& __loc)
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{
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locale __old(this->getloc());
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ios_base::imbue(__loc);
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_M_cache_facets(__loc);
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if (this->rdbuf() != 0)
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this->rdbuf()->pubimbue(__loc);
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return __old;
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}
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template<typename _CharT, typename _Traits>
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void
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basic_ios<_CharT, _Traits>::init(basic_streambuf<_CharT, _Traits>* __sb)
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{
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// NB: This may be called more than once on the same object.
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ios_base::_M_init();
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_M_cache_facets(_M_ios_locale);
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_M_tie = 0;
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// NB: The 27.4.4.1 Postconditions Table specifies requirements
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// after basic_ios::init() has been called. As part of this,
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// fill() must return widen(' ') any time after init() has been
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// called, which needs an imbued ctype facet of char_type to
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// return without throwing an exception. Unfortunately,
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// ctype<char_type> is not necessarily a required facet, so
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// streams with char_type != [char, wchar_t] will not have it by
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// default. Because of this, the correct value for _M_fill is
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// constructed on the first call of fill(). That way,
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// unformatted input and output with non-required basic_ios
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// instantiations is possible even without imbuing the expected
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// ctype<char_type> facet.
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_M_fill = _CharT();
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_M_fill_init = false;
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_M_exception = goodbit;
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_M_streambuf = __sb;
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_M_streambuf_state = __sb ? goodbit : badbit;
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}
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template<typename _CharT, typename _Traits>
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void
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basic_ios<_CharT, _Traits>::_M_cache_facets(const locale& __loc)
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{
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if (has_facet<__ctype_type>(__loc))
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_M_fctype = &use_facet<__ctype_type>(__loc);
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else
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_M_fctype = 0;
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// Should be filled in by ostream and istream, respectively.
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if (has_facet<__numput_type>(__loc))
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_M_fnumput = &use_facet<__numput_type>(__loc);
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else
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_M_fnumput = 0;
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if (has_facet<__numget_type>(__loc))
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_M_fnumget = &use_facet<__numget_type>(__loc);
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else
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_M_fnumget = 0;
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}
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// Inhibit implicit instantiations for required instantiations,
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// which are defined via explicit instantiations elsewhere.
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// NB: This syntax is a GNU extension.
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extern template class basic_ios<char>;
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#ifdef _GLIBCPP_USE_WCHAR_T
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extern template class basic_ios<wchar_t>;
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#endif
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} // namespace std
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#endif
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